| 1 | /* Window creation, deletion and examination for GNU Emacs. |
| 2 | Does not include redisplay. |
| 3 | Copyright (C) 1985-1987, 1993-1998, 2000-2013 Free Software |
| 4 | Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | |
| 25 | #include "lisp.h" |
| 26 | #include "character.h" |
| 27 | #include "buffer.h" |
| 28 | #include "keyboard.h" |
| 29 | #include "keymap.h" |
| 30 | #include "frame.h" |
| 31 | #include "window.h" |
| 32 | #include "commands.h" |
| 33 | #include "indent.h" |
| 34 | #include "termchar.h" |
| 35 | #include "disptab.h" |
| 36 | #include "dispextern.h" |
| 37 | #include "blockinput.h" |
| 38 | #include "intervals.h" |
| 39 | #include "termhooks.h" /* For FRAME_TERMINAL. */ |
| 40 | #ifdef HAVE_WINDOW_SYSTEM |
| 41 | #include TERM_HEADER |
| 42 | #endif /* HAVE_WINDOW_SYSTEM */ |
| 43 | #ifdef MSDOS |
| 44 | #include "msdos.h" |
| 45 | #endif |
| 46 | |
| 47 | Lisp_Object Qwindowp, Qwindow_live_p; |
| 48 | static Lisp_Object Qwindow_valid_p; |
| 49 | static Lisp_Object Qwindow_configuration_p; |
| 50 | static Lisp_Object Qrecord_window_buffer; |
| 51 | static Lisp_Object Qwindow_deletable_p, Qdelete_window, Qdisplay_buffer; |
| 52 | static Lisp_Object Qreplace_buffer_in_windows, Qget_mru_window; |
| 53 | static Lisp_Object Qwindow_resize_root_window, Qwindow_resize_root_window_vertically; |
| 54 | static Lisp_Object Qscroll_up, Qscroll_down, Qscroll_command; |
| 55 | static Lisp_Object Qsafe, Qabove, Qbelow, Qwindow_size, Qclone_of; |
| 56 | |
| 57 | static int displayed_window_lines (struct window *); |
| 58 | static int count_windows (struct window *); |
| 59 | static int get_leaf_windows (struct window *, struct window **, int); |
| 60 | static void window_scroll (Lisp_Object, EMACS_INT, bool, int); |
| 61 | static void window_scroll_pixel_based (Lisp_Object, int, bool, int); |
| 62 | static void window_scroll_line_based (Lisp_Object, int, bool, int); |
| 63 | static Lisp_Object window_list (void); |
| 64 | static int add_window_to_list (struct window *, void *); |
| 65 | static Lisp_Object next_window (Lisp_Object, Lisp_Object, |
| 66 | Lisp_Object, int); |
| 67 | static void decode_next_window_args (Lisp_Object *, Lisp_Object *, |
| 68 | Lisp_Object *); |
| 69 | static void foreach_window (struct frame *, |
| 70 | int (* fn) (struct window *, void *), |
| 71 | void *); |
| 72 | static int foreach_window_1 (struct window *, |
| 73 | int (* fn) (struct window *, void *), |
| 74 | void *); |
| 75 | static Lisp_Object window_list_1 (Lisp_Object, Lisp_Object, Lisp_Object); |
| 76 | static int window_resize_check (struct window *, bool); |
| 77 | static void window_resize_apply (struct window *, bool); |
| 78 | static Lisp_Object select_window (Lisp_Object, Lisp_Object, int); |
| 79 | static void select_window_1 (Lisp_Object, bool); |
| 80 | |
| 81 | static struct window *set_window_fringes (struct window *, Lisp_Object, |
| 82 | Lisp_Object, Lisp_Object); |
| 83 | static struct window *set_window_margins (struct window *, Lisp_Object, |
| 84 | Lisp_Object); |
| 85 | static struct window *set_window_scroll_bars (struct window *, Lisp_Object, |
| 86 | Lisp_Object, Lisp_Object); |
| 87 | static void apply_window_adjustment (struct window *); |
| 88 | |
| 89 | /* This is the window in which the terminal's cursor should |
| 90 | be left when nothing is being done with it. This must |
| 91 | always be a leaf window, and its buffer is selected by |
| 92 | the top level editing loop at the end of each command. |
| 93 | |
| 94 | This value is always the same as |
| 95 | FRAME_SELECTED_WINDOW (selected_frame). */ |
| 96 | Lisp_Object selected_window; |
| 97 | |
| 98 | /* A list of all windows for use by next_window and Fwindow_list. |
| 99 | Functions creating or deleting windows should invalidate this cache |
| 100 | by setting it to nil. */ |
| 101 | Lisp_Object Vwindow_list; |
| 102 | |
| 103 | /* The mini-buffer window of the selected frame. |
| 104 | Note that you cannot test for mini-bufferness of an arbitrary window |
| 105 | by comparing against this; but you can test for mini-bufferness of |
| 106 | the selected window. */ |
| 107 | Lisp_Object minibuf_window; |
| 108 | |
| 109 | /* Non-nil means it is the window whose mode line should be |
| 110 | shown as the selected window when the minibuffer is selected. */ |
| 111 | Lisp_Object minibuf_selected_window; |
| 112 | |
| 113 | /* Hook run at end of temp_output_buffer_show. */ |
| 114 | static Lisp_Object Qtemp_buffer_show_hook; |
| 115 | |
| 116 | /* Nonzero after init_window_once has finished. */ |
| 117 | static int window_initialized; |
| 118 | |
| 119 | /* Hook to run when window config changes. */ |
| 120 | static Lisp_Object Qwindow_configuration_change_hook; |
| 121 | |
| 122 | /* Used by the function window_scroll_pixel_based */ |
| 123 | static int window_scroll_pixel_based_preserve_x; |
| 124 | static int window_scroll_pixel_based_preserve_y; |
| 125 | |
| 126 | /* Same for window_scroll_line_based. */ |
| 127 | static EMACS_INT window_scroll_preserve_hpos; |
| 128 | static EMACS_INT window_scroll_preserve_vpos; |
| 129 | \f |
| 130 | static void |
| 131 | CHECK_WINDOW_CONFIGURATION (Lisp_Object x) |
| 132 | { |
| 133 | CHECK_TYPE (WINDOW_CONFIGURATIONP (x), Qwindow_configuration_p, x); |
| 134 | } |
| 135 | |
| 136 | /* These setters are used only in this file, so they can be private. */ |
| 137 | static void |
| 138 | wset_combination_limit (struct window *w, Lisp_Object val) |
| 139 | { |
| 140 | w->combination_limit = val; |
| 141 | } |
| 142 | static void |
| 143 | wset_dedicated (struct window *w, Lisp_Object val) |
| 144 | { |
| 145 | w->dedicated = val; |
| 146 | } |
| 147 | static void |
| 148 | wset_display_table (struct window *w, Lisp_Object val) |
| 149 | { |
| 150 | w->display_table = val; |
| 151 | } |
| 152 | static void |
| 153 | wset_new_normal (struct window *w, Lisp_Object val) |
| 154 | { |
| 155 | w->new_normal = val; |
| 156 | } |
| 157 | static void |
| 158 | wset_new_total (struct window *w, Lisp_Object val) |
| 159 | { |
| 160 | w->new_total = val; |
| 161 | } |
| 162 | static void |
| 163 | wset_normal_cols (struct window *w, Lisp_Object val) |
| 164 | { |
| 165 | w->normal_cols = val; |
| 166 | } |
| 167 | static void |
| 168 | wset_normal_lines (struct window *w, Lisp_Object val) |
| 169 | { |
| 170 | w->normal_lines = val; |
| 171 | } |
| 172 | static void |
| 173 | wset_parent (struct window *w, Lisp_Object val) |
| 174 | { |
| 175 | w->parent = val; |
| 176 | } |
| 177 | static void |
| 178 | wset_pointm (struct window *w, Lisp_Object val) |
| 179 | { |
| 180 | w->pointm = val; |
| 181 | } |
| 182 | static void |
| 183 | wset_start (struct window *w, Lisp_Object val) |
| 184 | { |
| 185 | w->start = val; |
| 186 | } |
| 187 | static void |
| 188 | wset_temslot (struct window *w, Lisp_Object val) |
| 189 | { |
| 190 | w->temslot = val; |
| 191 | } |
| 192 | static void |
| 193 | wset_vertical_scroll_bar_type (struct window *w, Lisp_Object val) |
| 194 | { |
| 195 | w->vertical_scroll_bar_type = val; |
| 196 | } |
| 197 | static void |
| 198 | wset_window_parameters (struct window *w, Lisp_Object val) |
| 199 | { |
| 200 | w->window_parameters = val; |
| 201 | } |
| 202 | static void |
| 203 | wset_combination (struct window *w, bool horflag, Lisp_Object val) |
| 204 | { |
| 205 | /* Since leaf windows never becomes non-leaf, there should |
| 206 | be no buffer and markers in start and pointm fields of W. */ |
| 207 | eassert (!BUFFERP (w->contents) && NILP (w->start) && NILP (w->pointm)); |
| 208 | w->contents = val; |
| 209 | /* When an internal window is deleted and VAL is nil, HORFLAG |
| 210 | is meaningless. */ |
| 211 | if (!NILP (val)) |
| 212 | w->horizontal = horflag; |
| 213 | } |
| 214 | |
| 215 | /* Nonzero if leaf window W doesn't reflect the actual state |
| 216 | of displayed buffer due to its text or overlays change. */ |
| 217 | |
| 218 | bool |
| 219 | window_outdated (struct window *w) |
| 220 | { |
| 221 | struct buffer *b = XBUFFER (w->contents); |
| 222 | return (w->last_modified < BUF_MODIFF (b) |
| 223 | || w->last_overlay_modified < BUF_OVERLAY_MODIFF (b)); |
| 224 | } |
| 225 | |
| 226 | struct window * |
| 227 | decode_live_window (register Lisp_Object window) |
| 228 | { |
| 229 | if (NILP (window)) |
| 230 | return XWINDOW (selected_window); |
| 231 | |
| 232 | CHECK_LIVE_WINDOW (window); |
| 233 | return XWINDOW (window); |
| 234 | } |
| 235 | |
| 236 | struct window * |
| 237 | decode_any_window (register Lisp_Object window) |
| 238 | { |
| 239 | struct window *w; |
| 240 | |
| 241 | if (NILP (window)) |
| 242 | return XWINDOW (selected_window); |
| 243 | |
| 244 | CHECK_WINDOW (window); |
| 245 | w = XWINDOW (window); |
| 246 | return w; |
| 247 | } |
| 248 | |
| 249 | static struct window * |
| 250 | decode_valid_window (register Lisp_Object window) |
| 251 | { |
| 252 | struct window *w; |
| 253 | |
| 254 | if (NILP (window)) |
| 255 | return XWINDOW (selected_window); |
| 256 | |
| 257 | CHECK_VALID_WINDOW (window); |
| 258 | w = XWINDOW (window); |
| 259 | return w; |
| 260 | } |
| 261 | |
| 262 | /* Called when W's buffer slot is changed. ARG -1 means that W is about to |
| 263 | cease its buffer, and 1 means that W is about to set up the new one. */ |
| 264 | |
| 265 | static void |
| 266 | adjust_window_count (struct window *w, int arg) |
| 267 | { |
| 268 | eassert (eabs (arg) == 1); |
| 269 | if (BUFFERP (w->contents)) |
| 270 | { |
| 271 | struct buffer *b = XBUFFER (w->contents); |
| 272 | |
| 273 | if (b->base_buffer) |
| 274 | b = b->base_buffer; |
| 275 | b->window_count += arg; |
| 276 | eassert (b->window_count >= 0); |
| 277 | /* These should be recalculated by redisplay code. */ |
| 278 | w->window_end_valid = 0; |
| 279 | w->base_line_pos = 0; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | /* Set W's buffer slot to VAL and recompute number |
| 284 | of windows showing VAL if it is a buffer. */ |
| 285 | |
| 286 | void |
| 287 | wset_buffer (struct window *w, Lisp_Object val) |
| 288 | { |
| 289 | adjust_window_count (w, -1); |
| 290 | if (BUFFERP (val)) |
| 291 | /* Make sure that we do not assign the buffer |
| 292 | to an internal window. */ |
| 293 | eassert (MARKERP (w->start) && MARKERP (w->pointm)); |
| 294 | w->contents = val; |
| 295 | adjust_window_count (w, 1); |
| 296 | } |
| 297 | |
| 298 | DEFUN ("windowp", Fwindowp, Swindowp, 1, 1, 0, |
| 299 | doc: /* Return t if OBJECT is a window and nil otherwise. */) |
| 300 | (Lisp_Object object) |
| 301 | { |
| 302 | return WINDOWP (object) ? Qt : Qnil; |
| 303 | } |
| 304 | |
| 305 | DEFUN ("window-valid-p", Fwindow_valid_p, Swindow_valid_p, 1, 1, 0, |
| 306 | doc: /* Return t if OBJECT is a valid window and nil otherwise. |
| 307 | A valid window is either a window that displays a buffer or an internal |
| 308 | window. Deleted windows are not live. */) |
| 309 | (Lisp_Object object) |
| 310 | { |
| 311 | return WINDOW_VALID_P (object) ? Qt : Qnil; |
| 312 | } |
| 313 | |
| 314 | DEFUN ("window-live-p", Fwindow_live_p, Swindow_live_p, 1, 1, 0, |
| 315 | doc: /* Return t if OBJECT is a live window and nil otherwise. |
| 316 | A live window is a window that displays a buffer. |
| 317 | Internal windows and deleted windows are not live. */) |
| 318 | (Lisp_Object object) |
| 319 | { |
| 320 | return WINDOW_LIVE_P (object) ? Qt : Qnil; |
| 321 | } |
| 322 | \f |
| 323 | /* Frames and windows. */ |
| 324 | DEFUN ("window-frame", Fwindow_frame, Swindow_frame, 0, 1, 0, |
| 325 | doc: /* Return the frame that window WINDOW is on. |
| 326 | WINDOW must be a valid window and defaults to the selected one. */) |
| 327 | (Lisp_Object window) |
| 328 | { |
| 329 | return decode_valid_window (window)->frame; |
| 330 | } |
| 331 | |
| 332 | DEFUN ("frame-root-window", Fframe_root_window, Sframe_root_window, 0, 1, 0, |
| 333 | doc: /* Return the root window of FRAME-OR-WINDOW. |
| 334 | If omitted, FRAME-OR-WINDOW defaults to the currently selected frame. |
| 335 | With a frame argument, return that frame's root window. |
| 336 | With a window argument, return the root window of that window's frame. */) |
| 337 | (Lisp_Object frame_or_window) |
| 338 | { |
| 339 | Lisp_Object window; |
| 340 | |
| 341 | if (NILP (frame_or_window)) |
| 342 | window = SELECTED_FRAME ()->root_window; |
| 343 | else if (WINDOW_VALID_P (frame_or_window)) |
| 344 | window = XFRAME (XWINDOW (frame_or_window)->frame)->root_window; |
| 345 | else |
| 346 | { |
| 347 | CHECK_LIVE_FRAME (frame_or_window); |
| 348 | window = XFRAME (frame_or_window)->root_window; |
| 349 | } |
| 350 | |
| 351 | return window; |
| 352 | } |
| 353 | |
| 354 | DEFUN ("minibuffer-window", Fminibuffer_window, Sminibuffer_window, 0, 1, 0, |
| 355 | doc: /* Return the minibuffer window for frame FRAME. |
| 356 | If FRAME is omitted or nil, it defaults to the selected frame. */) |
| 357 | (Lisp_Object frame) |
| 358 | { |
| 359 | return FRAME_MINIBUF_WINDOW (decode_live_frame (frame)); |
| 360 | } |
| 361 | |
| 362 | DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p, |
| 363 | Swindow_minibuffer_p, 0, 1, 0, |
| 364 | doc: /* Return non-nil if WINDOW is a minibuffer window. |
| 365 | WINDOW must be a valid window and defaults to the selected one. */) |
| 366 | (Lisp_Object window) |
| 367 | { |
| 368 | return MINI_WINDOW_P (decode_valid_window (window)) ? Qt : Qnil; |
| 369 | } |
| 370 | |
| 371 | /* Don't move this to window.el - this must be a safe routine. */ |
| 372 | DEFUN ("frame-first-window", Fframe_first_window, Sframe_first_window, 0, 1, 0, |
| 373 | doc: /* Return the topmost, leftmost live window on FRAME-OR-WINDOW. |
| 374 | If omitted, FRAME-OR-WINDOW defaults to the currently selected frame. |
| 375 | Else if FRAME-OR-WINDOW denotes a valid window, return the first window |
| 376 | of that window's frame. If FRAME-OR-WINDOW denotes a live frame, return |
| 377 | the first window of that frame. */) |
| 378 | (Lisp_Object frame_or_window) |
| 379 | { |
| 380 | Lisp_Object window; |
| 381 | |
| 382 | if (NILP (frame_or_window)) |
| 383 | window = SELECTED_FRAME ()->root_window; |
| 384 | else if (WINDOW_VALID_P (frame_or_window)) |
| 385 | window = XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window)))->root_window; |
| 386 | else |
| 387 | { |
| 388 | CHECK_LIVE_FRAME (frame_or_window); |
| 389 | window = XFRAME (frame_or_window)->root_window; |
| 390 | } |
| 391 | |
| 392 | while (WINDOWP (XWINDOW (window)->contents)) |
| 393 | window = XWINDOW (window)->contents; |
| 394 | |
| 395 | return window; |
| 396 | } |
| 397 | |
| 398 | DEFUN ("frame-selected-window", Fframe_selected_window, |
| 399 | Sframe_selected_window, 0, 1, 0, |
| 400 | doc: /* Return the selected window of FRAME-OR-WINDOW. |
| 401 | If omitted, FRAME-OR-WINDOW defaults to the currently selected frame. |
| 402 | Else if FRAME-OR-WINDOW denotes a valid window, return the selected |
| 403 | window of that window's frame. If FRAME-OR-WINDOW denotes a live frame, |
| 404 | return the selected window of that frame. */) |
| 405 | (Lisp_Object frame_or_window) |
| 406 | { |
| 407 | Lisp_Object window; |
| 408 | |
| 409 | if (NILP (frame_or_window)) |
| 410 | window = SELECTED_FRAME ()->selected_window; |
| 411 | else if (WINDOW_VALID_P (frame_or_window)) |
| 412 | window = XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window)))->selected_window; |
| 413 | else |
| 414 | { |
| 415 | CHECK_LIVE_FRAME (frame_or_window); |
| 416 | window = XFRAME (frame_or_window)->selected_window; |
| 417 | } |
| 418 | |
| 419 | return window; |
| 420 | } |
| 421 | |
| 422 | DEFUN ("set-frame-selected-window", Fset_frame_selected_window, |
| 423 | Sset_frame_selected_window, 2, 3, 0, |
| 424 | doc: /* Set selected window of FRAME to WINDOW. |
| 425 | FRAME must be a live frame and defaults to the selected one. If FRAME |
| 426 | is the selected frame, this makes WINDOW the selected window. Optional |
| 427 | argument NORECORD non-nil means to neither change the order of recently |
| 428 | selected windows nor the buffer list. WINDOW must denote a live window. |
| 429 | Return WINDOW. */) |
| 430 | (Lisp_Object frame, Lisp_Object window, Lisp_Object norecord) |
| 431 | { |
| 432 | if (NILP (frame)) |
| 433 | frame = selected_frame; |
| 434 | |
| 435 | CHECK_LIVE_FRAME (frame); |
| 436 | CHECK_LIVE_WINDOW (window); |
| 437 | |
| 438 | if (! EQ (frame, WINDOW_FRAME (XWINDOW (window)))) |
| 439 | error ("In `set-frame-selected-window', WINDOW is not on FRAME"); |
| 440 | |
| 441 | if (EQ (frame, selected_frame)) |
| 442 | return Fselect_window (window, norecord); |
| 443 | else |
| 444 | { |
| 445 | fset_selected_window (XFRAME (frame), window); |
| 446 | return window; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | DEFUN ("selected-window", Fselected_window, Sselected_window, 0, 0, 0, |
| 451 | doc: /* Return the selected window. |
| 452 | The selected window is the window in which the standard cursor for |
| 453 | selected windows appears and to which many commands apply. */) |
| 454 | (void) |
| 455 | { |
| 456 | return selected_window; |
| 457 | } |
| 458 | |
| 459 | int window_select_count; |
| 460 | |
| 461 | /* If select_window is called with inhibit_point_swap non-zero it will |
| 462 | not store point of the old selected window's buffer back into that |
| 463 | window's pointm slot. This is needed by Fset_window_configuration to |
| 464 | avoid that the display routine is called with selected_window set to |
| 465 | Qnil causing a subsequent crash. */ |
| 466 | static Lisp_Object |
| 467 | select_window (Lisp_Object window, Lisp_Object norecord, int inhibit_point_swap) |
| 468 | { |
| 469 | register struct window *w; |
| 470 | struct frame *sf; |
| 471 | |
| 472 | CHECK_LIVE_WINDOW (window); |
| 473 | |
| 474 | w = XWINDOW (window); |
| 475 | |
| 476 | /* Make the selected window's buffer current. */ |
| 477 | Fset_buffer (w->contents); |
| 478 | |
| 479 | if (EQ (window, selected_window) && !inhibit_point_swap) |
| 480 | /* `switch-to-buffer' uses (select-window (selected-window)) as a "clever" |
| 481 | way to call record_buffer from Elisp, so it's important that we call |
| 482 | record_buffer before returning here. */ |
| 483 | goto record_and_return; |
| 484 | |
| 485 | sf = SELECTED_FRAME (); |
| 486 | if (XFRAME (WINDOW_FRAME (w)) != sf) |
| 487 | { |
| 488 | fset_selected_window (XFRAME (WINDOW_FRAME (w)), window); |
| 489 | /* Use this rather than Fhandle_switch_frame |
| 490 | so that FRAME_FOCUS_FRAME is moved appropriately as we |
| 491 | move around in the state where a minibuffer in a separate |
| 492 | frame is active. */ |
| 493 | Fselect_frame (WINDOW_FRAME (w), norecord); |
| 494 | /* Fselect_frame called us back so we've done all the work already. */ |
| 495 | eassert (EQ (window, selected_window)); |
| 496 | return window; |
| 497 | } |
| 498 | else |
| 499 | fset_selected_window (sf, window); |
| 500 | |
| 501 | select_window_1 (window, inhibit_point_swap); |
| 502 | bset_last_selected_window (XBUFFER (w->contents), window); |
| 503 | windows_or_buffers_changed++; |
| 504 | |
| 505 | record_and_return: |
| 506 | /* record_buffer can run QUIT, so make sure it is run only after we have |
| 507 | re-established the invariant between selected_window and selected_frame, |
| 508 | otherwise the temporary broken invariant might "escape" (bug#14161). */ |
| 509 | if (NILP (norecord)) |
| 510 | { |
| 511 | w->use_time = ++window_select_count; |
| 512 | record_buffer (w->contents); |
| 513 | } |
| 514 | |
| 515 | return window; |
| 516 | } |
| 517 | |
| 518 | /* Select window with a minimum of fuss, i.e. don't record the change anywhere |
| 519 | (not even for redisplay's benefit), and assume that the window's frame is |
| 520 | already selected. */ |
| 521 | static void |
| 522 | select_window_1 (Lisp_Object window, bool inhibit_point_swap) |
| 523 | { |
| 524 | /* Store the old selected window's buffer's point in pointm of the old |
| 525 | selected window. It belongs to that window, and when the window is |
| 526 | not selected, must be in the window. */ |
| 527 | if (!inhibit_point_swap) |
| 528 | { |
| 529 | struct window *ow = XWINDOW (selected_window); |
| 530 | if (BUFFERP (ow->contents)) |
| 531 | set_marker_both (ow->pointm, ow->contents, |
| 532 | BUF_PT (XBUFFER (ow->contents)), |
| 533 | BUF_PT_BYTE (XBUFFER (ow->contents))); |
| 534 | } |
| 535 | |
| 536 | selected_window = window; |
| 537 | |
| 538 | /* Go to the point recorded in the window. |
| 539 | This is important when the buffer is in more |
| 540 | than one window. It also matters when |
| 541 | redisplay_window has altered point after scrolling, |
| 542 | because it makes the change only in the window. */ |
| 543 | set_point_from_marker (XWINDOW (window)->pointm); |
| 544 | } |
| 545 | |
| 546 | DEFUN ("select-window", Fselect_window, Sselect_window, 1, 2, 0, |
| 547 | doc: /* Select WINDOW which must be a live window. |
| 548 | Also make WINDOW's frame the selected frame and WINDOW that frame's |
| 549 | selected window. In addition, make WINDOW's buffer current and set that |
| 550 | buffer's value of `point' to the value of WINDOW's `window-point'. |
| 551 | Return WINDOW. |
| 552 | |
| 553 | Optional second arg NORECORD non-nil means do not put this buffer at the |
| 554 | front of the buffer list and do not make this window the most recently |
| 555 | selected one. |
| 556 | |
| 557 | Note that the main editor command loop sets the current buffer to the |
| 558 | buffer of the selected window before each command. */) |
| 559 | (register Lisp_Object window, Lisp_Object norecord) |
| 560 | { |
| 561 | return select_window (window, norecord, 0); |
| 562 | } |
| 563 | \f |
| 564 | DEFUN ("window-buffer", Fwindow_buffer, Swindow_buffer, 0, 1, 0, |
| 565 | doc: /* Return the buffer displayed in window WINDOW. |
| 566 | If WINDOW is omitted or nil, it defaults to the selected window. |
| 567 | Return nil for an internal window or a deleted window. */) |
| 568 | (Lisp_Object window) |
| 569 | { |
| 570 | struct window *w = decode_any_window (window); |
| 571 | return WINDOW_LEAF_P (w) ? w->contents : Qnil; |
| 572 | } |
| 573 | |
| 574 | DEFUN ("window-parent", Fwindow_parent, Swindow_parent, 0, 1, 0, |
| 575 | doc: /* Return the parent window of window WINDOW. |
| 576 | WINDOW must be a valid window and defaults to the selected one. |
| 577 | Return nil for a window with no parent (e.g. a root window). */) |
| 578 | (Lisp_Object window) |
| 579 | { |
| 580 | return decode_valid_window (window)->parent; |
| 581 | } |
| 582 | |
| 583 | DEFUN ("window-top-child", Fwindow_top_child, Swindow_top_child, 0, 1, 0, |
| 584 | doc: /* Return the topmost child window of window WINDOW. |
| 585 | WINDOW must be a valid window and defaults to the selected one. |
| 586 | Return nil if WINDOW is a live window (live windows have no children). |
| 587 | Return nil if WINDOW is an internal window whose children form a |
| 588 | horizontal combination. */) |
| 589 | (Lisp_Object window) |
| 590 | { |
| 591 | struct window *w = decode_valid_window (window); |
| 592 | return WINDOW_VERTICAL_COMBINATION_P (w) ? w->contents : Qnil; |
| 593 | } |
| 594 | |
| 595 | DEFUN ("window-left-child", Fwindow_left_child, Swindow_left_child, 0, 1, 0, |
| 596 | doc: /* Return the leftmost child window of window WINDOW. |
| 597 | WINDOW must be a valid window and defaults to the selected one. |
| 598 | Return nil if WINDOW is a live window (live windows have no children). |
| 599 | Return nil if WINDOW is an internal window whose children form a |
| 600 | vertical combination. */) |
| 601 | (Lisp_Object window) |
| 602 | { |
| 603 | struct window *w = decode_valid_window (window); |
| 604 | return WINDOW_HORIZONTAL_COMBINATION_P (w) ? w->contents : Qnil; |
| 605 | } |
| 606 | |
| 607 | DEFUN ("window-next-sibling", Fwindow_next_sibling, Swindow_next_sibling, 0, 1, 0, |
| 608 | doc: /* Return the next sibling window of window WINDOW. |
| 609 | WINDOW must be a valid window and defaults to the selected one. |
| 610 | Return nil if WINDOW has no next sibling. */) |
| 611 | (Lisp_Object window) |
| 612 | { |
| 613 | return decode_valid_window (window)->next; |
| 614 | } |
| 615 | |
| 616 | DEFUN ("window-prev-sibling", Fwindow_prev_sibling, Swindow_prev_sibling, 0, 1, 0, |
| 617 | doc: /* Return the previous sibling window of window WINDOW. |
| 618 | WINDOW must be a valid window and defaults to the selected one. |
| 619 | Return nil if WINDOW has no previous sibling. */) |
| 620 | (Lisp_Object window) |
| 621 | { |
| 622 | return decode_valid_window (window)->prev; |
| 623 | } |
| 624 | |
| 625 | DEFUN ("window-combination-limit", Fwindow_combination_limit, Swindow_combination_limit, 1, 1, 0, |
| 626 | doc: /* Return combination limit of window WINDOW. |
| 627 | WINDOW must be a valid window used in horizontal or vertical combination. |
| 628 | If the return value is nil, child windows of WINDOW can be recombined with |
| 629 | WINDOW's siblings. A return value of t means that child windows of |
| 630 | WINDOW are never \(re-)combined with WINDOW's siblings. */) |
| 631 | (Lisp_Object window) |
| 632 | { |
| 633 | struct window *w; |
| 634 | |
| 635 | CHECK_VALID_WINDOW (window); |
| 636 | w = XWINDOW (window); |
| 637 | if (WINDOW_LEAF_P (w)) |
| 638 | error ("Combination limit is meaningful for internal windows only"); |
| 639 | return w->combination_limit; |
| 640 | } |
| 641 | |
| 642 | DEFUN ("set-window-combination-limit", Fset_window_combination_limit, Sset_window_combination_limit, 2, 2, 0, |
| 643 | doc: /* Set combination limit of window WINDOW to LIMIT; return LIMIT. |
| 644 | WINDOW must be a valid window used in horizontal or vertical combination. |
| 645 | If LIMIT is nil, child windows of WINDOW can be recombined with WINDOW's |
| 646 | siblings. LIMIT t means that child windows of WINDOW are never |
| 647 | \(re-)combined with WINDOW's siblings. Other values are reserved for |
| 648 | future use. */) |
| 649 | (Lisp_Object window, Lisp_Object limit) |
| 650 | { |
| 651 | struct window *w; |
| 652 | |
| 653 | CHECK_VALID_WINDOW (window); |
| 654 | w = XWINDOW (window); |
| 655 | if (WINDOW_LEAF_P (w)) |
| 656 | error ("Combination limit is meaningful for internal windows only"); |
| 657 | wset_combination_limit (w, limit); |
| 658 | return limit; |
| 659 | } |
| 660 | |
| 661 | DEFUN ("window-use-time", Fwindow_use_time, Swindow_use_time, 0, 1, 0, |
| 662 | doc: /* Return the use time of window WINDOW. |
| 663 | WINDOW must be a live window and defaults to the selected one. |
| 664 | The window with the highest use time is the most recently selected |
| 665 | one. The window with the lowest use time is the least recently |
| 666 | selected one. */) |
| 667 | (Lisp_Object window) |
| 668 | { |
| 669 | return make_number (decode_live_window (window)->use_time); |
| 670 | } |
| 671 | \f |
| 672 | DEFUN ("window-total-height", Fwindow_total_height, Swindow_total_height, 0, 1, 0, |
| 673 | doc: /* Return the total height, in lines, of window WINDOW. |
| 674 | WINDOW must be a valid window and defaults to the selected one. |
| 675 | |
| 676 | The return value includes the mode line and header line, if any. |
| 677 | If WINDOW is an internal window, the total height is the height |
| 678 | of the screen areas spanned by its children. |
| 679 | |
| 680 | On a graphical display, this total height is reported as an |
| 681 | integer multiple of the default character height. */) |
| 682 | (Lisp_Object window) |
| 683 | { |
| 684 | return make_number (decode_valid_window (window)->total_lines); |
| 685 | } |
| 686 | |
| 687 | DEFUN ("window-total-width", Fwindow_total_width, Swindow_total_width, 0, 1, 0, |
| 688 | doc: /* Return the total width, in columns, of window WINDOW. |
| 689 | WINDOW must be a valid window and defaults to the selected one. |
| 690 | |
| 691 | The return value includes any vertical dividers or scroll bars |
| 692 | belonging to WINDOW. If WINDOW is an internal window, the total width |
| 693 | is the width of the screen areas spanned by its children. |
| 694 | |
| 695 | On a graphical display, this total width is reported as an |
| 696 | integer multiple of the default character width. */) |
| 697 | (Lisp_Object window) |
| 698 | { |
| 699 | return make_number (decode_valid_window (window)->total_cols); |
| 700 | } |
| 701 | |
| 702 | DEFUN ("window-new-total", Fwindow_new_total, Swindow_new_total, 0, 1, 0, |
| 703 | doc: /* Return the new total size of window WINDOW. |
| 704 | WINDOW must be a valid window and defaults to the selected one. */) |
| 705 | (Lisp_Object window) |
| 706 | { |
| 707 | return decode_valid_window (window)->new_total; |
| 708 | } |
| 709 | |
| 710 | DEFUN ("window-normal-size", Fwindow_normal_size, Swindow_normal_size, 0, 2, 0, |
| 711 | doc: /* Return the normal height of window WINDOW. |
| 712 | WINDOW must be a valid window and defaults to the selected one. |
| 713 | If HORIZONTAL is non-nil, return the normal width of WINDOW. */) |
| 714 | (Lisp_Object window, Lisp_Object horizontal) |
| 715 | { |
| 716 | struct window *w = decode_valid_window (window); |
| 717 | |
| 718 | return NILP (horizontal) ? w->normal_lines : w->normal_cols; |
| 719 | } |
| 720 | |
| 721 | DEFUN ("window-new-normal", Fwindow_new_normal, Swindow_new_normal, 0, 1, 0, |
| 722 | doc: /* Return new normal size of window WINDOW. |
| 723 | WINDOW must be a valid window and defaults to the selected one. */) |
| 724 | (Lisp_Object window) |
| 725 | { |
| 726 | return decode_valid_window (window)->new_normal; |
| 727 | } |
| 728 | |
| 729 | DEFUN ("window-left-column", Fwindow_left_column, Swindow_left_column, 0, 1, 0, |
| 730 | doc: /* Return left column of window WINDOW. |
| 731 | This is the distance, in columns, between the left edge of WINDOW and |
| 732 | the left edge of the frame's window area. For instance, the return |
| 733 | value is 0 if there is no window to the left of WINDOW. |
| 734 | |
| 735 | WINDOW must be a valid window and defaults to the selected one. */) |
| 736 | (Lisp_Object window) |
| 737 | { |
| 738 | return make_number (decode_valid_window (window)->left_col); |
| 739 | } |
| 740 | |
| 741 | DEFUN ("window-top-line", Fwindow_top_line, Swindow_top_line, 0, 1, 0, |
| 742 | doc: /* Return top line of window WINDOW. |
| 743 | This is the distance, in lines, between the top of WINDOW and the top |
| 744 | of the frame's window area. For instance, the return value is 0 if |
| 745 | there is no window above WINDOW. |
| 746 | |
| 747 | WINDOW must be a valid window and defaults to the selected one. */) |
| 748 | (Lisp_Object window) |
| 749 | { |
| 750 | return make_number (decode_valid_window (window)->top_line); |
| 751 | } |
| 752 | |
| 753 | /* Return the number of lines of W's body. Don't count any mode or |
| 754 | header line of W. */ |
| 755 | |
| 756 | static int |
| 757 | window_body_lines (struct window *w) |
| 758 | { |
| 759 | int height = w->total_lines; |
| 760 | |
| 761 | if (!MINI_WINDOW_P (w)) |
| 762 | { |
| 763 | if (WINDOW_WANTS_MODELINE_P (w)) |
| 764 | --height; |
| 765 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
| 766 | --height; |
| 767 | } |
| 768 | |
| 769 | return height; |
| 770 | } |
| 771 | |
| 772 | /* Return the number of columns of W's body. Don't count columns |
| 773 | occupied by the scroll bar or the vertical bar separating W from its |
| 774 | right sibling. On window-systems don't count fringes or display |
| 775 | margins either. */ |
| 776 | |
| 777 | int |
| 778 | window_body_cols (struct window *w) |
| 779 | { |
| 780 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 781 | int width = w->total_cols; |
| 782 | |
| 783 | if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w)) |
| 784 | /* Scroll bars occupy a few columns. */ |
| 785 | width -= WINDOW_CONFIG_SCROLL_BAR_COLS (w); |
| 786 | else if (!FRAME_WINDOW_P (f) |
| 787 | && !WINDOW_RIGHTMOST_P (w) && !WINDOW_FULL_WIDTH_P (w)) |
| 788 | /* The column of `|' characters separating side-by-side windows |
| 789 | occupies one column only. */ |
| 790 | width -= 1; |
| 791 | |
| 792 | /* Display margins cannot be used for normal text. */ |
| 793 | width -= WINDOW_LEFT_MARGIN_COLS (w) + WINDOW_RIGHT_MARGIN_COLS (w); |
| 794 | |
| 795 | if (FRAME_WINDOW_P (f)) |
| 796 | /* On window-systems, fringes cannot be used for normal text. */ |
| 797 | width -= WINDOW_FRINGE_COLS (w); |
| 798 | |
| 799 | return width; |
| 800 | } |
| 801 | |
| 802 | DEFUN ("window-body-height", Fwindow_body_height, Swindow_body_height, 0, 1, 0, |
| 803 | doc: /* Return the height, in lines, of WINDOW's text area. |
| 804 | WINDOW must be a live window and defaults to the selected one. |
| 805 | |
| 806 | The returned height does not include the mode line or header line. |
| 807 | On a graphical display, the height is expressed as an integer multiple |
| 808 | of the default character height. If a line at the bottom of the text |
| 809 | area is only partially visible, that counts as a whole line; to |
| 810 | exclude partially-visible lines, use `window-text-height'. */) |
| 811 | (Lisp_Object window) |
| 812 | { |
| 813 | return make_number (window_body_lines (decode_live_window (window))); |
| 814 | } |
| 815 | |
| 816 | DEFUN ("window-body-width", Fwindow_body_width, Swindow_body_width, 0, 1, 0, |
| 817 | doc: /* Return the width, in columns, of WINDOW's text area. |
| 818 | WINDOW must be a live window and defaults to the selected one. |
| 819 | |
| 820 | The return value does not include any vertical dividers, fringe or |
| 821 | marginal areas, or scroll bars. On a graphical display, the width is |
| 822 | expressed as an integer multiple of the default character width. */) |
| 823 | (Lisp_Object window) |
| 824 | { |
| 825 | return make_number (window_body_cols (decode_live_window (window))); |
| 826 | } |
| 827 | |
| 828 | DEFUN ("window-hscroll", Fwindow_hscroll, Swindow_hscroll, 0, 1, 0, |
| 829 | doc: /* Return the number of columns by which WINDOW is scrolled from left margin. |
| 830 | WINDOW must be a live window and defaults to the selected one. */) |
| 831 | (Lisp_Object window) |
| 832 | { |
| 833 | return make_number (decode_live_window (window)->hscroll); |
| 834 | } |
| 835 | |
| 836 | /* Set W's horizontal scroll amount to HSCROLL clipped to a reasonable |
| 837 | range, returning the new amount as a fixnum. */ |
| 838 | static Lisp_Object |
| 839 | set_window_hscroll (struct window *w, EMACS_INT hscroll) |
| 840 | { |
| 841 | /* Horizontal scrolling has problems with large scroll amounts. |
| 842 | It's too slow with long lines, and even with small lines the |
| 843 | display can be messed up. For now, though, impose only the limits |
| 844 | required by the internal representation: horizontal scrolling must |
| 845 | fit in fixnum (since it's visible to Elisp) and into ptrdiff_t |
| 846 | (since it's stored in a ptrdiff_t). */ |
| 847 | ptrdiff_t hscroll_max = min (MOST_POSITIVE_FIXNUM, PTRDIFF_MAX); |
| 848 | ptrdiff_t new_hscroll = clip_to_bounds (0, hscroll, hscroll_max); |
| 849 | |
| 850 | /* Prevent redisplay shortcuts when changing the hscroll. */ |
| 851 | if (w->hscroll != new_hscroll) |
| 852 | XBUFFER (w->contents)->prevent_redisplay_optimizations_p = 1; |
| 853 | |
| 854 | w->hscroll = new_hscroll; |
| 855 | return make_number (new_hscroll); |
| 856 | } |
| 857 | |
| 858 | DEFUN ("set-window-hscroll", Fset_window_hscroll, Sset_window_hscroll, 2, 2, 0, |
| 859 | doc: /* Set number of columns WINDOW is scrolled from left margin to NCOL. |
| 860 | WINDOW must be a live window and defaults to the selected one. |
| 861 | Clip the number to a reasonable value if out of range. |
| 862 | Return the new number. NCOL should be zero or positive. |
| 863 | |
| 864 | Note that if `automatic-hscrolling' is non-nil, you cannot scroll the |
| 865 | window so that the location of point moves off-window. */) |
| 866 | (Lisp_Object window, Lisp_Object ncol) |
| 867 | { |
| 868 | CHECK_NUMBER (ncol); |
| 869 | return set_window_hscroll (decode_live_window (window), XINT (ncol)); |
| 870 | } |
| 871 | |
| 872 | DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger, |
| 873 | Swindow_redisplay_end_trigger, 0, 1, 0, |
| 874 | doc: /* Return WINDOW's redisplay end trigger value. |
| 875 | WINDOW must be a live window and defaults to the selected one. |
| 876 | See `set-window-redisplay-end-trigger' for more information. */) |
| 877 | (Lisp_Object window) |
| 878 | { |
| 879 | return decode_live_window (window)->redisplay_end_trigger; |
| 880 | } |
| 881 | |
| 882 | DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger, |
| 883 | Sset_window_redisplay_end_trigger, 2, 2, 0, |
| 884 | doc: /* Set WINDOW's redisplay end trigger value to VALUE. |
| 885 | WINDOW must be a live window and defaults to the selected one. VALUE |
| 886 | should be a buffer position (typically a marker) or nil. If it is a |
| 887 | buffer position, then if redisplay in WINDOW reaches a position beyond |
| 888 | VALUE, the functions in `redisplay-end-trigger-functions' are called |
| 889 | with two arguments: WINDOW, and the end trigger value. Afterwards the |
| 890 | end-trigger value is reset to nil. */) |
| 891 | (register Lisp_Object window, Lisp_Object value) |
| 892 | { |
| 893 | wset_redisplay_end_trigger (decode_live_window (window), value); |
| 894 | return value; |
| 895 | } |
| 896 | |
| 897 | DEFUN ("window-edges", Fwindow_edges, Swindow_edges, 0, 1, 0, |
| 898 | doc: /* Return a list of the edge coordinates of WINDOW. |
| 899 | WINDOW must be a valid window and defaults to the selected one. |
| 900 | |
| 901 | The returned list has the form (LEFT TOP RIGHT BOTTOM). TOP and BOTTOM |
| 902 | count by lines, and LEFT and RIGHT count by columns, all relative to 0, |
| 903 | 0 at top left corner of frame. |
| 904 | |
| 905 | RIGHT is one more than the rightmost column occupied by WINDOW. BOTTOM |
| 906 | is one more than the bottommost row occupied by WINDOW. The edges |
| 907 | include the space used by WINDOW's scroll bar, display margins, fringes, |
| 908 | header line, and/or mode line. For the edges of just the text area, use |
| 909 | `window-inside-edges'. */) |
| 910 | (Lisp_Object window) |
| 911 | { |
| 912 | register struct window *w = decode_valid_window (window); |
| 913 | |
| 914 | return list4i (WINDOW_LEFT_EDGE_COL (w), WINDOW_TOP_EDGE_LINE (w), |
| 915 | WINDOW_RIGHT_EDGE_COL (w), WINDOW_BOTTOM_EDGE_LINE (w)); |
| 916 | } |
| 917 | |
| 918 | DEFUN ("window-pixel-edges", Fwindow_pixel_edges, Swindow_pixel_edges, 0, 1, 0, |
| 919 | doc: /* Return a list of the edge pixel coordinates of WINDOW. |
| 920 | WINDOW must be a valid window and defaults to the selected one. |
| 921 | |
| 922 | The returned list has the form (LEFT TOP RIGHT BOTTOM), all relative to |
| 923 | 0, 0 at the top left corner of the frame. |
| 924 | |
| 925 | RIGHT is one more than the rightmost x position occupied by WINDOW. |
| 926 | BOTTOM is one more than the bottommost y position occupied by WINDOW. |
| 927 | The pixel edges include the space used by WINDOW's scroll bar, display |
| 928 | margins, fringes, header line, and/or mode line. For the pixel edges |
| 929 | of just the text area, use `window-inside-pixel-edges'. */) |
| 930 | (Lisp_Object window) |
| 931 | { |
| 932 | register struct window *w = decode_valid_window (window); |
| 933 | |
| 934 | return list4i (WINDOW_LEFT_EDGE_X (w), WINDOW_TOP_EDGE_Y (w), |
| 935 | WINDOW_RIGHT_EDGE_X (w), WINDOW_BOTTOM_EDGE_Y (w)); |
| 936 | } |
| 937 | |
| 938 | static void |
| 939 | calc_absolute_offset (struct window *w, int *add_x, int *add_y) |
| 940 | { |
| 941 | struct frame *f = XFRAME (w->frame); |
| 942 | *add_y = f->top_pos; |
| 943 | #ifdef FRAME_MENUBAR_HEIGHT |
| 944 | *add_y += FRAME_MENUBAR_HEIGHT (f); |
| 945 | #endif |
| 946 | #ifdef FRAME_TOOLBAR_TOP_HEIGHT |
| 947 | *add_y += FRAME_TOOLBAR_TOP_HEIGHT (f); |
| 948 | #elif FRAME_TOOLBAR_HEIGHT |
| 949 | *add_y += FRAME_TOOLBAR_HEIGHT (f); |
| 950 | #endif |
| 951 | #ifdef FRAME_NS_TITLEBAR_HEIGHT |
| 952 | *add_y += FRAME_NS_TITLEBAR_HEIGHT (f); |
| 953 | #endif |
| 954 | *add_x = f->left_pos; |
| 955 | #ifdef FRAME_TOOLBAR_LEFT_WIDTH |
| 956 | *add_x += FRAME_TOOLBAR_LEFT_WIDTH (f); |
| 957 | #endif |
| 958 | } |
| 959 | |
| 960 | DEFUN ("window-absolute-pixel-edges", Fwindow_absolute_pixel_edges, |
| 961 | Swindow_absolute_pixel_edges, 0, 1, 0, |
| 962 | doc: /* Return a list of the edge pixel coordinates of WINDOW. |
| 963 | WINDOW must be a valid window and defaults to the selected one. |
| 964 | |
| 965 | The returned list has the form (LEFT TOP RIGHT BOTTOM), all relative to |
| 966 | 0, 0 at the top left corner of the display. |
| 967 | |
| 968 | RIGHT is one more than the rightmost x position occupied by WINDOW. |
| 969 | BOTTOM is one more than the bottommost y position occupied by WINDOW. |
| 970 | The pixel edges include the space used by WINDOW's scroll bar, display |
| 971 | margins, fringes, header line, and/or mode line. For the pixel edges |
| 972 | of just the text area, use `window-inside-absolute-pixel-edges'. */) |
| 973 | (Lisp_Object window) |
| 974 | { |
| 975 | register struct window *w = decode_valid_window (window); |
| 976 | int add_x, add_y; |
| 977 | |
| 978 | calc_absolute_offset (w, &add_x, &add_y); |
| 979 | |
| 980 | return list4i (WINDOW_LEFT_EDGE_X (w) + add_x, |
| 981 | WINDOW_TOP_EDGE_Y (w) + add_y, |
| 982 | WINDOW_RIGHT_EDGE_X (w) + add_x, |
| 983 | WINDOW_BOTTOM_EDGE_Y (w) + add_y); |
| 984 | } |
| 985 | |
| 986 | DEFUN ("window-inside-edges", Fwindow_inside_edges, Swindow_inside_edges, 0, 1, 0, |
| 987 | doc: /* Return a list of the edge coordinates of WINDOW. |
| 988 | WINDOW must be a live window and defaults to the selected one. |
| 989 | |
| 990 | The returned list has the form (LEFT TOP RIGHT BOTTOM). TOP and BOTTOM |
| 991 | count by lines, and LEFT and RIGHT count by columns, all relative to 0, |
| 992 | 0 at top left corner of frame. |
| 993 | |
| 994 | RIGHT is one more than the rightmost column of WINDOW's text area. |
| 995 | BOTTOM is one more than the bottommost row of WINDOW's text area. The |
| 996 | inside edges do not include the space used by the WINDOW's scroll bar, |
| 997 | display margins, fringes, header line, and/or mode line. */) |
| 998 | (Lisp_Object window) |
| 999 | { |
| 1000 | register struct window *w = decode_live_window (window); |
| 1001 | |
| 1002 | return list4i ((WINDOW_BOX_LEFT_EDGE_COL (w) |
| 1003 | + WINDOW_LEFT_MARGIN_COLS (w) |
| 1004 | + WINDOW_LEFT_FRINGE_COLS (w)), |
| 1005 | (WINDOW_TOP_EDGE_LINE (w) |
| 1006 | + WINDOW_HEADER_LINE_LINES (w)), |
| 1007 | (WINDOW_BOX_RIGHT_EDGE_COL (w) |
| 1008 | - WINDOW_RIGHT_MARGIN_COLS (w) |
| 1009 | - WINDOW_RIGHT_FRINGE_COLS (w)), |
| 1010 | (WINDOW_BOTTOM_EDGE_LINE (w) |
| 1011 | - WINDOW_MODE_LINE_LINES (w))); |
| 1012 | } |
| 1013 | |
| 1014 | DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges, Swindow_inside_pixel_edges, 0, 1, 0, |
| 1015 | doc: /* Return a list of the edge pixel coordinates of WINDOW's text area. |
| 1016 | WINDOW must be a live window and defaults to the selected one. |
| 1017 | |
| 1018 | The returned list has the form (LEFT TOP RIGHT BOTTOM), all relative to |
| 1019 | (0,0) at the top left corner of the frame's window area. |
| 1020 | |
| 1021 | RIGHT is one more than the rightmost x position of WINDOW's text area. |
| 1022 | BOTTOM is one more than the bottommost y position of WINDOW's text area. |
| 1023 | The inside edges do not include the space used by WINDOW's scroll bar, |
| 1024 | display margins, fringes, header line, and/or mode line. */) |
| 1025 | (Lisp_Object window) |
| 1026 | { |
| 1027 | register struct window *w = decode_live_window (window); |
| 1028 | |
| 1029 | return list4i ((WINDOW_BOX_LEFT_EDGE_X (w) |
| 1030 | + WINDOW_LEFT_MARGIN_WIDTH (w) |
| 1031 | + WINDOW_LEFT_FRINGE_WIDTH (w)), |
| 1032 | (WINDOW_TOP_EDGE_Y (w) |
| 1033 | + WINDOW_HEADER_LINE_HEIGHT (w)), |
| 1034 | (WINDOW_BOX_RIGHT_EDGE_X (w) |
| 1035 | - WINDOW_RIGHT_MARGIN_WIDTH (w) |
| 1036 | - WINDOW_RIGHT_FRINGE_WIDTH (w)), |
| 1037 | (WINDOW_BOTTOM_EDGE_Y (w) |
| 1038 | - WINDOW_MODE_LINE_HEIGHT (w))); |
| 1039 | } |
| 1040 | |
| 1041 | DEFUN ("window-inside-absolute-pixel-edges", |
| 1042 | Fwindow_inside_absolute_pixel_edges, |
| 1043 | Swindow_inside_absolute_pixel_edges, 0, 1, 0, |
| 1044 | doc: /* Return a list of the edge pixel coordinates of WINDOW's text area. |
| 1045 | WINDOW must be a live window and defaults to the selected one. |
| 1046 | |
| 1047 | The returned list has the form (LEFT TOP RIGHT BOTTOM), all relative to |
| 1048 | (0,0) at the top left corner of the frame's window area. |
| 1049 | |
| 1050 | RIGHT is one more than the rightmost x position of WINDOW's text area. |
| 1051 | BOTTOM is one more than the bottommost y position of WINDOW's text area. |
| 1052 | The inside edges do not include the space used by WINDOW's scroll bar, |
| 1053 | display margins, fringes, header line, and/or mode line. */) |
| 1054 | (Lisp_Object window) |
| 1055 | { |
| 1056 | register struct window *w = decode_live_window (window); |
| 1057 | int add_x, add_y; |
| 1058 | |
| 1059 | calc_absolute_offset (w, &add_x, &add_y); |
| 1060 | |
| 1061 | return list4i ((WINDOW_BOX_LEFT_EDGE_X (w) |
| 1062 | + WINDOW_LEFT_MARGIN_WIDTH (w) |
| 1063 | + WINDOW_LEFT_FRINGE_WIDTH (w) + add_x), |
| 1064 | (WINDOW_TOP_EDGE_Y (w) |
| 1065 | + WINDOW_HEADER_LINE_HEIGHT (w) + add_y), |
| 1066 | (WINDOW_BOX_RIGHT_EDGE_X (w) |
| 1067 | - WINDOW_RIGHT_MARGIN_WIDTH (w) |
| 1068 | - WINDOW_RIGHT_FRINGE_WIDTH (w) + add_x), |
| 1069 | (WINDOW_BOTTOM_EDGE_Y (w) |
| 1070 | - WINDOW_MODE_LINE_HEIGHT (w) + add_y)); |
| 1071 | } |
| 1072 | |
| 1073 | /* Test if the character at column X, row Y is within window W. |
| 1074 | If it is not, return ON_NOTHING; |
| 1075 | if it is in the window's text area, return ON_TEXT; |
| 1076 | if it is on the window's modeline, return ON_MODE_LINE; |
| 1077 | if it is on the border between the window and its right sibling, |
| 1078 | return ON_VERTICAL_BORDER. |
| 1079 | if it is on a scroll bar, return ON_SCROLL_BAR. |
| 1080 | if it is on the window's top line, return ON_HEADER_LINE; |
| 1081 | if it is in left or right fringe of the window, |
| 1082 | return ON_LEFT_FRINGE or ON_RIGHT_FRINGE; |
| 1083 | if it is in the marginal area to the left/right of the window, |
| 1084 | return ON_LEFT_MARGIN or ON_RIGHT_MARGIN. |
| 1085 | |
| 1086 | X and Y are frame relative pixel coordinates. */ |
| 1087 | |
| 1088 | static enum window_part |
| 1089 | coordinates_in_window (register struct window *w, int x, int y) |
| 1090 | { |
| 1091 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 1092 | enum window_part part; |
| 1093 | int ux = FRAME_COLUMN_WIDTH (f); |
| 1094 | int left_x = WINDOW_LEFT_EDGE_X (w); |
| 1095 | int right_x = WINDOW_RIGHT_EDGE_X (w); |
| 1096 | int top_y = WINDOW_TOP_EDGE_Y (w); |
| 1097 | int bottom_y = WINDOW_BOTTOM_EDGE_Y (w); |
| 1098 | /* The width of the area where the vertical line can be dragged. |
| 1099 | (Between mode lines for instance. */ |
| 1100 | int grabbable_width = ux; |
| 1101 | int lmargin_width, rmargin_width, text_left, text_right; |
| 1102 | |
| 1103 | /* Outside any interesting row or column? */ |
| 1104 | if (y < top_y || y >= bottom_y || x < left_x || x >= right_x) |
| 1105 | return ON_NOTHING; |
| 1106 | |
| 1107 | /* On the mode line or header line? */ |
| 1108 | if ((WINDOW_WANTS_MODELINE_P (w) |
| 1109 | && y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w) |
| 1110 | && (part = ON_MODE_LINE)) |
| 1111 | || (WINDOW_WANTS_HEADER_LINE_P (w) |
| 1112 | && y < top_y + CURRENT_HEADER_LINE_HEIGHT (w) |
| 1113 | && (part = ON_HEADER_LINE))) |
| 1114 | { |
| 1115 | /* If it's under/over the scroll bar portion of the mode/header |
| 1116 | line, say it's on the vertical line. That's to be able to |
| 1117 | resize windows horizontally in case we're using toolkit scroll |
| 1118 | bars. Note: If scrollbars are on the left, the window that |
| 1119 | must be eventually resized is that on the left of WINDOW. */ |
| 1120 | if ((WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w) |
| 1121 | && !WINDOW_LEFTMOST_P (w) |
| 1122 | && eabs (x - left_x) < grabbable_width) |
| 1123 | || (!WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w) |
| 1124 | && !WINDOW_RIGHTMOST_P (w) |
| 1125 | && eabs (x - right_x) < grabbable_width)) |
| 1126 | return ON_VERTICAL_BORDER; |
| 1127 | else |
| 1128 | return part; |
| 1129 | } |
| 1130 | |
| 1131 | /* In what's below, we subtract 1 when computing right_x because we |
| 1132 | want the rightmost pixel, which is given by left_pixel+width-1. */ |
| 1133 | if (w->pseudo_window_p) |
| 1134 | { |
| 1135 | left_x = 0; |
| 1136 | right_x = WINDOW_TOTAL_WIDTH (w) - 1; |
| 1137 | } |
| 1138 | else |
| 1139 | { |
| 1140 | left_x = WINDOW_BOX_LEFT_EDGE_X (w); |
| 1141 | right_x = WINDOW_BOX_RIGHT_EDGE_X (w) - 1; |
| 1142 | } |
| 1143 | |
| 1144 | /* Outside any interesting column? */ |
| 1145 | if (x < left_x || x > right_x) |
| 1146 | return ON_SCROLL_BAR; |
| 1147 | |
| 1148 | lmargin_width = window_box_width (w, LEFT_MARGIN_AREA); |
| 1149 | rmargin_width = window_box_width (w, RIGHT_MARGIN_AREA); |
| 1150 | |
| 1151 | text_left = window_box_left (w, TEXT_AREA); |
| 1152 | text_right = text_left + window_box_width (w, TEXT_AREA); |
| 1153 | |
| 1154 | if (FRAME_WINDOW_P (f)) |
| 1155 | { |
| 1156 | if (!w->pseudo_window_p |
| 1157 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w) |
| 1158 | && !WINDOW_RIGHTMOST_P (w) |
| 1159 | && (eabs (x - right_x) < grabbable_width)) |
| 1160 | return ON_VERTICAL_BORDER; |
| 1161 | } |
| 1162 | /* Need to say "x > right_x" rather than >=, since on character |
| 1163 | terminals, the vertical line's x coordinate is right_x. */ |
| 1164 | else if (!w->pseudo_window_p |
| 1165 | && !WINDOW_RIGHTMOST_P (w) |
| 1166 | && x > right_x - ux) |
| 1167 | return ON_VERTICAL_BORDER; |
| 1168 | |
| 1169 | if (x < text_left) |
| 1170 | { |
| 1171 | if (lmargin_width > 0 |
| 1172 | && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
| 1173 | ? (x >= left_x + WINDOW_LEFT_FRINGE_WIDTH (w)) |
| 1174 | : (x < left_x + lmargin_width))) |
| 1175 | return ON_LEFT_MARGIN; |
| 1176 | |
| 1177 | return ON_LEFT_FRINGE; |
| 1178 | } |
| 1179 | |
| 1180 | if (x >= text_right) |
| 1181 | { |
| 1182 | if (rmargin_width > 0 |
| 1183 | && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
| 1184 | ? (x < right_x - WINDOW_RIGHT_FRINGE_WIDTH (w)) |
| 1185 | : (x >= right_x - rmargin_width))) |
| 1186 | return ON_RIGHT_MARGIN; |
| 1187 | |
| 1188 | return ON_RIGHT_FRINGE; |
| 1189 | } |
| 1190 | |
| 1191 | /* Everything special ruled out - must be on text area */ |
| 1192 | return ON_TEXT; |
| 1193 | } |
| 1194 | |
| 1195 | /* Take X is the frame-relative pixel x-coordinate, and return the |
| 1196 | x-coordinate relative to part PART of window W. */ |
| 1197 | int |
| 1198 | window_relative_x_coord (struct window *w, enum window_part part, int x) |
| 1199 | { |
| 1200 | int left_x = (w->pseudo_window_p) ? 0 : WINDOW_BOX_LEFT_EDGE_X (w); |
| 1201 | |
| 1202 | switch (part) |
| 1203 | { |
| 1204 | case ON_TEXT: |
| 1205 | return x - window_box_left (w, TEXT_AREA); |
| 1206 | |
| 1207 | case ON_LEFT_FRINGE: |
| 1208 | return x - left_x; |
| 1209 | |
| 1210 | case ON_RIGHT_FRINGE: |
| 1211 | return x - left_x - WINDOW_LEFT_FRINGE_WIDTH (w); |
| 1212 | |
| 1213 | case ON_LEFT_MARGIN: |
| 1214 | return (x - left_x |
| 1215 | - ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)) |
| 1216 | ? WINDOW_LEFT_FRINGE_WIDTH (w) : 0)); |
| 1217 | |
| 1218 | case ON_RIGHT_MARGIN: |
| 1219 | return (x + 1 |
| 1220 | - ((w->pseudo_window_p) |
| 1221 | ? WINDOW_TOTAL_WIDTH (w) |
| 1222 | : WINDOW_BOX_RIGHT_EDGE_X (w)) |
| 1223 | + window_box_width (w, RIGHT_MARGIN_AREA) |
| 1224 | + ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)) |
| 1225 | ? WINDOW_RIGHT_FRINGE_WIDTH (w) : 0)); |
| 1226 | } |
| 1227 | |
| 1228 | /* ON_SCROLL_BAR, ON_NOTHING, and ON_VERTICAL_BORDER: */ |
| 1229 | return 0; |
| 1230 | } |
| 1231 | |
| 1232 | |
| 1233 | DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p, |
| 1234 | Scoordinates_in_window_p, 2, 2, 0, |
| 1235 | doc: /* Return non-nil if COORDINATES are in WINDOW. |
| 1236 | WINDOW must be a live window and defaults to the selected one. |
| 1237 | COORDINATES is a cons of the form (X . Y), X and Y being distances |
| 1238 | measured in characters from the upper-left corner of the frame. |
| 1239 | \(0 . 0) denotes the character in the upper left corner of the |
| 1240 | frame. |
| 1241 | If COORDINATES are in the text portion of WINDOW, |
| 1242 | the coordinates relative to the window are returned. |
| 1243 | If they are in the mode line of WINDOW, `mode-line' is returned. |
| 1244 | If they are in the top mode line of WINDOW, `header-line' is returned. |
| 1245 | If they are in the left fringe of WINDOW, `left-fringe' is returned. |
| 1246 | If they are in the right fringe of WINDOW, `right-fringe' is returned. |
| 1247 | If they are on the border between WINDOW and its right sibling, |
| 1248 | `vertical-line' is returned. |
| 1249 | If they are in the windows's left or right marginal areas, `left-margin'\n\ |
| 1250 | or `right-margin' is returned. */) |
| 1251 | (register Lisp_Object coordinates, Lisp_Object window) |
| 1252 | { |
| 1253 | struct window *w; |
| 1254 | struct frame *f; |
| 1255 | int x, y; |
| 1256 | Lisp_Object lx, ly; |
| 1257 | |
| 1258 | w = decode_live_window (window); |
| 1259 | f = XFRAME (w->frame); |
| 1260 | CHECK_CONS (coordinates); |
| 1261 | lx = Fcar (coordinates); |
| 1262 | ly = Fcdr (coordinates); |
| 1263 | CHECK_NUMBER_OR_FLOAT (lx); |
| 1264 | CHECK_NUMBER_OR_FLOAT (ly); |
| 1265 | x = FRAME_PIXEL_X_FROM_CANON_X (f, lx) + FRAME_INTERNAL_BORDER_WIDTH (f); |
| 1266 | y = FRAME_PIXEL_Y_FROM_CANON_Y (f, ly) + FRAME_INTERNAL_BORDER_WIDTH (f); |
| 1267 | |
| 1268 | switch (coordinates_in_window (w, x, y)) |
| 1269 | { |
| 1270 | case ON_NOTHING: |
| 1271 | return Qnil; |
| 1272 | |
| 1273 | case ON_TEXT: |
| 1274 | /* Convert X and Y to window relative pixel coordinates, and |
| 1275 | return the canonical char units. */ |
| 1276 | x -= window_box_left (w, TEXT_AREA); |
| 1277 | y -= WINDOW_TOP_EDGE_Y (w); |
| 1278 | return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f, x), |
| 1279 | FRAME_CANON_Y_FROM_PIXEL_Y (f, y)); |
| 1280 | |
| 1281 | case ON_MODE_LINE: |
| 1282 | return Qmode_line; |
| 1283 | |
| 1284 | case ON_VERTICAL_BORDER: |
| 1285 | return Qvertical_line; |
| 1286 | |
| 1287 | case ON_HEADER_LINE: |
| 1288 | return Qheader_line; |
| 1289 | |
| 1290 | case ON_LEFT_FRINGE: |
| 1291 | return Qleft_fringe; |
| 1292 | |
| 1293 | case ON_RIGHT_FRINGE: |
| 1294 | return Qright_fringe; |
| 1295 | |
| 1296 | case ON_LEFT_MARGIN: |
| 1297 | return Qleft_margin; |
| 1298 | |
| 1299 | case ON_RIGHT_MARGIN: |
| 1300 | return Qright_margin; |
| 1301 | |
| 1302 | case ON_SCROLL_BAR: |
| 1303 | /* Historically we are supposed to return nil in this case. */ |
| 1304 | return Qnil; |
| 1305 | |
| 1306 | default: |
| 1307 | emacs_abort (); |
| 1308 | } |
| 1309 | } |
| 1310 | |
| 1311 | |
| 1312 | /* Callback for foreach_window, used in window_from_coordinates. |
| 1313 | Check if window W contains coordinates specified by USER_DATA which |
| 1314 | is actually a pointer to a struct check_window_data CW. |
| 1315 | |
| 1316 | Check if window W contains coordinates *CW->x and *CW->y. If it |
| 1317 | does, return W in *CW->window, as Lisp_Object, and return in |
| 1318 | *CW->part the part of the window under coordinates *X,*Y. Return |
| 1319 | zero from this function to stop iterating over windows. */ |
| 1320 | |
| 1321 | struct check_window_data |
| 1322 | { |
| 1323 | Lisp_Object *window; |
| 1324 | int x, y; |
| 1325 | enum window_part *part; |
| 1326 | }; |
| 1327 | |
| 1328 | static int |
| 1329 | check_window_containing (struct window *w, void *user_data) |
| 1330 | { |
| 1331 | struct check_window_data *cw = user_data; |
| 1332 | enum window_part found; |
| 1333 | int continue_p = 1; |
| 1334 | |
| 1335 | found = coordinates_in_window (w, cw->x, cw->y); |
| 1336 | if (found != ON_NOTHING) |
| 1337 | { |
| 1338 | *cw->part = found; |
| 1339 | XSETWINDOW (*cw->window, w); |
| 1340 | continue_p = 0; |
| 1341 | } |
| 1342 | |
| 1343 | return continue_p; |
| 1344 | } |
| 1345 | |
| 1346 | |
| 1347 | /* Find the window containing frame-relative pixel position X/Y and |
| 1348 | return it as a Lisp_Object. |
| 1349 | |
| 1350 | If X, Y is on one of the window's special `window_part' elements, |
| 1351 | set *PART to the id of that element. |
| 1352 | |
| 1353 | If there is no window under X, Y return nil and leave *PART |
| 1354 | unmodified. TOOL_BAR_P non-zero means detect tool-bar windows. |
| 1355 | |
| 1356 | This function was previously implemented with a loop cycling over |
| 1357 | windows with Fnext_window, and starting with the frame's selected |
| 1358 | window. It turned out that this doesn't work with an |
| 1359 | implementation of next_window using Vwindow_list, because |
| 1360 | FRAME_SELECTED_WINDOW (F) is not always contained in the window |
| 1361 | tree of F when this function is called asynchronously from |
| 1362 | note_mouse_highlight. The original loop didn't terminate in this |
| 1363 | case. */ |
| 1364 | |
| 1365 | Lisp_Object |
| 1366 | window_from_coordinates (struct frame *f, int x, int y, |
| 1367 | enum window_part *part, bool tool_bar_p) |
| 1368 | { |
| 1369 | Lisp_Object window; |
| 1370 | struct check_window_data cw; |
| 1371 | enum window_part dummy; |
| 1372 | |
| 1373 | if (part == 0) |
| 1374 | part = &dummy; |
| 1375 | |
| 1376 | window = Qnil; |
| 1377 | cw.window = &window, cw.x = x, cw.y = y; cw.part = part; |
| 1378 | foreach_window (f, check_window_containing, &cw); |
| 1379 | |
| 1380 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
| 1381 | /* If not found above, see if it's in the tool bar window, if a tool |
| 1382 | bar exists. */ |
| 1383 | if (NILP (window) |
| 1384 | && tool_bar_p |
| 1385 | && WINDOWP (f->tool_bar_window) |
| 1386 | && WINDOW_TOTAL_LINES (XWINDOW (f->tool_bar_window)) > 0 |
| 1387 | && (coordinates_in_window (XWINDOW (f->tool_bar_window), x, y) |
| 1388 | != ON_NOTHING)) |
| 1389 | { |
| 1390 | *part = ON_TEXT; |
| 1391 | window = f->tool_bar_window; |
| 1392 | } |
| 1393 | #endif |
| 1394 | |
| 1395 | return window; |
| 1396 | } |
| 1397 | |
| 1398 | DEFUN ("window-at", Fwindow_at, Swindow_at, 2, 3, 0, |
| 1399 | doc: /* Return window containing coordinates X and Y on FRAME. |
| 1400 | FRAME must be a live frame and defaults to the selected one. |
| 1401 | The top left corner of the frame is considered to be row 0, |
| 1402 | column 0. */) |
| 1403 | (Lisp_Object x, Lisp_Object y, Lisp_Object frame) |
| 1404 | { |
| 1405 | struct frame *f = decode_live_frame (frame); |
| 1406 | |
| 1407 | /* Check that arguments are integers or floats. */ |
| 1408 | CHECK_NUMBER_OR_FLOAT (x); |
| 1409 | CHECK_NUMBER_OR_FLOAT (y); |
| 1410 | |
| 1411 | return window_from_coordinates (f, |
| 1412 | (FRAME_PIXEL_X_FROM_CANON_X (f, x) |
| 1413 | + FRAME_INTERNAL_BORDER_WIDTH (f)), |
| 1414 | (FRAME_PIXEL_Y_FROM_CANON_Y (f, y) |
| 1415 | + FRAME_INTERNAL_BORDER_WIDTH (f)), |
| 1416 | 0, 0); |
| 1417 | } |
| 1418 | |
| 1419 | DEFUN ("window-point", Fwindow_point, Swindow_point, 0, 1, 0, |
| 1420 | doc: /* Return current value of point in WINDOW. |
| 1421 | WINDOW must be a live window and defaults to the selected one. |
| 1422 | |
| 1423 | For a nonselected window, this is the value point would have if that |
| 1424 | window were selected. |
| 1425 | |
| 1426 | Note that, when WINDOW is selected, the value returned is the same as |
| 1427 | that returned by `point' for WINDOW's buffer. It would be more strictly |
| 1428 | correct to return the top-level value of `point', outside of any |
| 1429 | `save-excursion' forms. But that is hard to define. */) |
| 1430 | (Lisp_Object window) |
| 1431 | { |
| 1432 | register struct window *w = decode_live_window (window); |
| 1433 | |
| 1434 | if (w == XWINDOW (selected_window)) |
| 1435 | return make_number (BUF_PT (XBUFFER (w->contents))); |
| 1436 | else |
| 1437 | return Fmarker_position (w->pointm); |
| 1438 | } |
| 1439 | |
| 1440 | DEFUN ("window-start", Fwindow_start, Swindow_start, 0, 1, 0, |
| 1441 | doc: /* Return position at which display currently starts in WINDOW. |
| 1442 | WINDOW must be a live window and defaults to the selected one. |
| 1443 | This is updated by redisplay or by calling `set-window-start'. */) |
| 1444 | (Lisp_Object window) |
| 1445 | { |
| 1446 | return Fmarker_position (decode_live_window (window)->start); |
| 1447 | } |
| 1448 | |
| 1449 | /* This is text temporarily removed from the doc string below. |
| 1450 | |
| 1451 | This function returns nil if the position is not currently known. |
| 1452 | That happens when redisplay is preempted and doesn't finish. |
| 1453 | If in that case you want to compute where the end of the window would |
| 1454 | have been if redisplay had finished, do this: |
| 1455 | (save-excursion |
| 1456 | (goto-char (window-start window)) |
| 1457 | (vertical-motion (1- (window-height window)) window) |
| 1458 | (point))") */ |
| 1459 | |
| 1460 | DEFUN ("window-end", Fwindow_end, Swindow_end, 0, 2, 0, |
| 1461 | doc: /* Return position at which display currently ends in WINDOW. |
| 1462 | WINDOW must be a live window and defaults to the selected one. |
| 1463 | This is updated by redisplay, when it runs to completion. |
| 1464 | Simply changing the buffer text or setting `window-start' |
| 1465 | does not update this value. |
| 1466 | Return nil if there is no recorded value. (This can happen if the |
| 1467 | last redisplay of WINDOW was preempted, and did not finish.) |
| 1468 | If UPDATE is non-nil, compute the up-to-date position |
| 1469 | if it isn't already recorded. */) |
| 1470 | (Lisp_Object window, Lisp_Object update) |
| 1471 | { |
| 1472 | Lisp_Object value; |
| 1473 | struct window *w = decode_live_window (window); |
| 1474 | Lisp_Object buf; |
| 1475 | struct buffer *b; |
| 1476 | |
| 1477 | buf = w->contents; |
| 1478 | CHECK_BUFFER (buf); |
| 1479 | b = XBUFFER (buf); |
| 1480 | |
| 1481 | if (! NILP (update) |
| 1482 | && (windows_or_buffers_changed |
| 1483 | || !w->window_end_valid |
| 1484 | || b->clip_changed |
| 1485 | || b->prevent_redisplay_optimizations_p |
| 1486 | || window_outdated (w)) |
| 1487 | && !noninteractive) |
| 1488 | { |
| 1489 | struct text_pos startp; |
| 1490 | struct it it; |
| 1491 | struct buffer *old_buffer = NULL; |
| 1492 | void *itdata = NULL; |
| 1493 | |
| 1494 | /* Cannot use Fvertical_motion because that function doesn't |
| 1495 | cope with variable-height lines. */ |
| 1496 | if (b != current_buffer) |
| 1497 | { |
| 1498 | old_buffer = current_buffer; |
| 1499 | set_buffer_internal (b); |
| 1500 | } |
| 1501 | |
| 1502 | /* In case W->start is out of the range, use something |
| 1503 | reasonable. This situation occurred when loading a file with |
| 1504 | `-l' containing a call to `rmail' with subsequent other |
| 1505 | commands. At the end, W->start happened to be BEG, while |
| 1506 | rmail had already narrowed the buffer. */ |
| 1507 | CLIP_TEXT_POS_FROM_MARKER (startp, w->start); |
| 1508 | |
| 1509 | itdata = bidi_shelve_cache (); |
| 1510 | start_display (&it, w, startp); |
| 1511 | move_it_vertically (&it, window_box_height (w)); |
| 1512 | if (it.current_y < it.last_visible_y) |
| 1513 | move_it_past_eol (&it); |
| 1514 | value = make_number (IT_CHARPOS (it)); |
| 1515 | bidi_unshelve_cache (itdata, 0); |
| 1516 | |
| 1517 | if (old_buffer) |
| 1518 | set_buffer_internal (old_buffer); |
| 1519 | } |
| 1520 | else |
| 1521 | XSETINT (value, BUF_Z (b) - w->window_end_pos); |
| 1522 | |
| 1523 | return value; |
| 1524 | } |
| 1525 | |
| 1526 | DEFUN ("set-window-point", Fset_window_point, Sset_window_point, 2, 2, 0, |
| 1527 | doc: /* Make point value in WINDOW be at position POS in WINDOW's buffer. |
| 1528 | WINDOW must be a live window and defaults to the selected one. |
| 1529 | Return POS. */) |
| 1530 | (Lisp_Object window, Lisp_Object pos) |
| 1531 | { |
| 1532 | register struct window *w = decode_live_window (window); |
| 1533 | |
| 1534 | /* Type of POS is checked by Fgoto_char or set_marker_restricted ... */ |
| 1535 | |
| 1536 | if (w == XWINDOW (selected_window)) |
| 1537 | { |
| 1538 | if (XBUFFER (w->contents) == current_buffer) |
| 1539 | Fgoto_char (pos); |
| 1540 | else |
| 1541 | { |
| 1542 | struct buffer *old_buffer = current_buffer; |
| 1543 | |
| 1544 | /* ... but here we want to catch type error before buffer change. */ |
| 1545 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1546 | set_buffer_internal (XBUFFER (w->contents)); |
| 1547 | Fgoto_char (pos); |
| 1548 | set_buffer_internal (old_buffer); |
| 1549 | } |
| 1550 | } |
| 1551 | else |
| 1552 | { |
| 1553 | set_marker_restricted (w->pointm, pos, w->contents); |
| 1554 | /* We have to make sure that redisplay updates the window to show |
| 1555 | the new value of point. */ |
| 1556 | ++windows_or_buffers_changed; |
| 1557 | } |
| 1558 | |
| 1559 | return pos; |
| 1560 | } |
| 1561 | |
| 1562 | DEFUN ("set-window-start", Fset_window_start, Sset_window_start, 2, 3, 0, |
| 1563 | doc: /* Make display in WINDOW start at position POS in WINDOW's buffer. |
| 1564 | WINDOW must be a live window and defaults to the selected one. Return |
| 1565 | POS. Optional third arg NOFORCE non-nil inhibits next redisplay from |
| 1566 | overriding motion of point in order to display at this exact start. */) |
| 1567 | (Lisp_Object window, Lisp_Object pos, Lisp_Object noforce) |
| 1568 | { |
| 1569 | register struct window *w = decode_live_window (window); |
| 1570 | |
| 1571 | set_marker_restricted (w->start, pos, w->contents); |
| 1572 | /* This is not right, but much easier than doing what is right. */ |
| 1573 | w->start_at_line_beg = 0; |
| 1574 | if (NILP (noforce)) |
| 1575 | w->force_start = 1; |
| 1576 | w->update_mode_line = 1; |
| 1577 | if (w != XWINDOW (selected_window)) |
| 1578 | /* Enforce full redisplay. FIXME: make it more selective. */ |
| 1579 | windows_or_buffers_changed++; |
| 1580 | |
| 1581 | return pos; |
| 1582 | } |
| 1583 | |
| 1584 | DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p, |
| 1585 | Spos_visible_in_window_p, 0, 3, 0, |
| 1586 | doc: /* Return non-nil if position POS is currently on the frame in WINDOW. |
| 1587 | WINDOW must be a live window and defaults to the selected one. |
| 1588 | |
| 1589 | Return nil if that position is scrolled vertically out of view. If a |
| 1590 | character is only partially visible, nil is returned, unless the |
| 1591 | optional argument PARTIALLY is non-nil. If POS is only out of view |
| 1592 | because of horizontal scrolling, return non-nil. If POS is t, it |
| 1593 | specifies the position of the last visible glyph in WINDOW. POS |
| 1594 | defaults to point in WINDOW; WINDOW defaults to the selected window. |
| 1595 | |
| 1596 | If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil, |
| 1597 | the return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]), |
| 1598 | where X and Y are the pixel coordinates relative to the top left corner |
| 1599 | of the window. The remaining elements are omitted if the character after |
| 1600 | POS is fully visible; otherwise, RTOP and RBOT are the number of pixels |
| 1601 | off-window at the top and bottom of the screen line ("row") containing |
| 1602 | POS, ROWH is the visible height of that row, and VPOS is the row number |
| 1603 | \(zero-based). */) |
| 1604 | (Lisp_Object pos, Lisp_Object window, Lisp_Object partially) |
| 1605 | { |
| 1606 | register struct window *w; |
| 1607 | register EMACS_INT posint; |
| 1608 | register struct buffer *buf; |
| 1609 | struct text_pos top; |
| 1610 | Lisp_Object in_window = Qnil; |
| 1611 | int rtop, rbot, rowh, vpos, fully_p = 1; |
| 1612 | int x, y; |
| 1613 | |
| 1614 | w = decode_live_window (window); |
| 1615 | buf = XBUFFER (w->contents); |
| 1616 | SET_TEXT_POS_FROM_MARKER (top, w->start); |
| 1617 | |
| 1618 | if (EQ (pos, Qt)) |
| 1619 | posint = -1; |
| 1620 | else if (!NILP (pos)) |
| 1621 | { |
| 1622 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1623 | posint = XINT (pos); |
| 1624 | } |
| 1625 | else if (w == XWINDOW (selected_window)) |
| 1626 | posint = PT; |
| 1627 | else |
| 1628 | posint = marker_position (w->pointm); |
| 1629 | |
| 1630 | /* If position is above window start or outside buffer boundaries, |
| 1631 | or if window start is out of range, position is not visible. */ |
| 1632 | if ((EQ (pos, Qt) |
| 1633 | || (posint >= CHARPOS (top) && posint <= BUF_ZV (buf))) |
| 1634 | && CHARPOS (top) >= BUF_BEGV (buf) |
| 1635 | && CHARPOS (top) <= BUF_ZV (buf) |
| 1636 | && pos_visible_p (w, posint, &x, &y, &rtop, &rbot, &rowh, &vpos) |
| 1637 | && (fully_p = !rtop && !rbot, (!NILP (partially) || fully_p))) |
| 1638 | in_window = Qt; |
| 1639 | |
| 1640 | if (!NILP (in_window) && !NILP (partially)) |
| 1641 | { |
| 1642 | Lisp_Object part = Qnil; |
| 1643 | if (!fully_p) |
| 1644 | part = list4i (rtop, rbot, rowh, vpos); |
| 1645 | in_window = Fcons (make_number (x), |
| 1646 | Fcons (make_number (y), part)); |
| 1647 | } |
| 1648 | |
| 1649 | return in_window; |
| 1650 | } |
| 1651 | |
| 1652 | DEFUN ("window-line-height", Fwindow_line_height, |
| 1653 | Swindow_line_height, 0, 2, 0, |
| 1654 | doc: /* Return height in pixels of text line LINE in window WINDOW. |
| 1655 | WINDOW must be a live window and defaults to the selected one. |
| 1656 | |
| 1657 | Return height of current line if LINE is omitted or nil. Return height of |
| 1658 | header or mode line if LINE is `header-line' or `mode-line'. |
| 1659 | Otherwise, LINE is a text line number starting from 0. A negative number |
| 1660 | counts from the end of the window. |
| 1661 | |
| 1662 | Value is a list (HEIGHT VPOS YPOS OFFBOT), where HEIGHT is the height |
| 1663 | in pixels of the visible part of the line, VPOS and YPOS are the |
| 1664 | vertical position in lines and pixels of the line, relative to the top |
| 1665 | of the first text line, and OFFBOT is the number of off-window pixels at |
| 1666 | the bottom of the text line. If there are off-window pixels at the top |
| 1667 | of the (first) text line, YPOS is negative. |
| 1668 | |
| 1669 | Return nil if window display is not up-to-date. In that case, use |
| 1670 | `pos-visible-in-window-p' to obtain the information. */) |
| 1671 | (Lisp_Object line, Lisp_Object window) |
| 1672 | { |
| 1673 | register struct window *w; |
| 1674 | register struct buffer *b; |
| 1675 | struct glyph_row *row, *end_row; |
| 1676 | int max_y, crop, i; |
| 1677 | EMACS_INT n; |
| 1678 | |
| 1679 | w = decode_live_window (window); |
| 1680 | |
| 1681 | if (noninteractive || w->pseudo_window_p) |
| 1682 | return Qnil; |
| 1683 | |
| 1684 | CHECK_BUFFER (w->contents); |
| 1685 | b = XBUFFER (w->contents); |
| 1686 | |
| 1687 | /* Fail if current matrix is not up-to-date. */ |
| 1688 | if (!w->window_end_valid |
| 1689 | || windows_or_buffers_changed |
| 1690 | || b->clip_changed |
| 1691 | || b->prevent_redisplay_optimizations_p |
| 1692 | || window_outdated (w)) |
| 1693 | return Qnil; |
| 1694 | |
| 1695 | if (NILP (line)) |
| 1696 | { |
| 1697 | i = w->cursor.vpos; |
| 1698 | if (i < 0 || i >= w->current_matrix->nrows |
| 1699 | || (row = MATRIX_ROW (w->current_matrix, i), !row->enabled_p)) |
| 1700 | return Qnil; |
| 1701 | max_y = window_text_bottom_y (w); |
| 1702 | goto found_row; |
| 1703 | } |
| 1704 | |
| 1705 | if (EQ (line, Qheader_line)) |
| 1706 | { |
| 1707 | if (!WINDOW_WANTS_HEADER_LINE_P (w)) |
| 1708 | return Qnil; |
| 1709 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
| 1710 | return row->enabled_p ? list4i (row->height, 0, 0, 0) : Qnil; |
| 1711 | } |
| 1712 | |
| 1713 | if (EQ (line, Qmode_line)) |
| 1714 | { |
| 1715 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
| 1716 | return (row->enabled_p ? |
| 1717 | list4i (row->height, |
| 1718 | 0, /* not accurate */ |
| 1719 | (WINDOW_HEADER_LINE_HEIGHT (w) |
| 1720 | + window_text_bottom_y (w)), |
| 1721 | 0) |
| 1722 | : Qnil); |
| 1723 | } |
| 1724 | |
| 1725 | CHECK_NUMBER (line); |
| 1726 | n = XINT (line); |
| 1727 | |
| 1728 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
| 1729 | end_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); |
| 1730 | max_y = window_text_bottom_y (w); |
| 1731 | i = 0; |
| 1732 | |
| 1733 | while ((n < 0 || i < n) |
| 1734 | && row <= end_row && row->enabled_p |
| 1735 | && row->y + row->height < max_y) |
| 1736 | row++, i++; |
| 1737 | |
| 1738 | if (row > end_row || !row->enabled_p) |
| 1739 | return Qnil; |
| 1740 | |
| 1741 | if (++n < 0) |
| 1742 | { |
| 1743 | if (-n > i) |
| 1744 | return Qnil; |
| 1745 | row += n; |
| 1746 | i += n; |
| 1747 | } |
| 1748 | |
| 1749 | found_row: |
| 1750 | crop = max (0, (row->y + row->height) - max_y); |
| 1751 | return list4i (row->height + min (0, row->y) - crop, i, row->y, crop); |
| 1752 | } |
| 1753 | |
| 1754 | DEFUN ("window-dedicated-p", Fwindow_dedicated_p, Swindow_dedicated_p, |
| 1755 | 0, 1, 0, |
| 1756 | doc: /* Return non-nil when WINDOW is dedicated to its buffer. |
| 1757 | More precisely, return the value assigned by the last call of |
| 1758 | `set-window-dedicated-p' for WINDOW. Return nil if that function was |
| 1759 | never called with WINDOW as its argument, or the value set by that |
| 1760 | function was internally reset since its last call. WINDOW must be a |
| 1761 | live window and defaults to the selected one. |
| 1762 | |
| 1763 | When a window is dedicated to its buffer, `display-buffer' will refrain |
| 1764 | from displaying another buffer in it. `get-lru-window' and |
| 1765 | `get-largest-window' treat dedicated windows specially. |
| 1766 | `delete-windows-on', `replace-buffer-in-windows', `quit-window' and |
| 1767 | `kill-buffer' can delete a dedicated window and the containing frame. |
| 1768 | |
| 1769 | Functions like `set-window-buffer' may change the buffer displayed by a |
| 1770 | window, unless that window is "strongly" dedicated to its buffer, that |
| 1771 | is the value returned by `window-dedicated-p' is t. */) |
| 1772 | (Lisp_Object window) |
| 1773 | { |
| 1774 | return decode_live_window (window)->dedicated; |
| 1775 | } |
| 1776 | |
| 1777 | DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p, |
| 1778 | Sset_window_dedicated_p, 2, 2, 0, |
| 1779 | doc: /* Mark WINDOW as dedicated according to FLAG. |
| 1780 | WINDOW must be a live window and defaults to the selected one. FLAG |
| 1781 | non-nil means mark WINDOW as dedicated to its buffer. FLAG nil means |
| 1782 | mark WINDOW as non-dedicated. Return FLAG. |
| 1783 | |
| 1784 | When a window is dedicated to its buffer, `display-buffer' will refrain |
| 1785 | from displaying another buffer in it. `get-lru-window' and |
| 1786 | `get-largest-window' treat dedicated windows specially. |
| 1787 | `delete-windows-on', `replace-buffer-in-windows', `quit-window', |
| 1788 | `quit-restore-window' and `kill-buffer' can delete a dedicated window |
| 1789 | and the containing frame. |
| 1790 | |
| 1791 | As a special case, if FLAG is t, mark WINDOW as "strongly" dedicated to |
| 1792 | its buffer. Functions like `set-window-buffer' may change the buffer |
| 1793 | displayed by a window, unless that window is strongly dedicated to its |
| 1794 | buffer. If and when `set-window-buffer' displays another buffer in a |
| 1795 | window, it also makes sure that the window is no more dedicated. */) |
| 1796 | (Lisp_Object window, Lisp_Object flag) |
| 1797 | { |
| 1798 | wset_dedicated (decode_live_window (window), flag); |
| 1799 | return flag; |
| 1800 | } |
| 1801 | |
| 1802 | DEFUN ("window-prev-buffers", Fwindow_prev_buffers, Swindow_prev_buffers, |
| 1803 | 0, 1, 0, |
| 1804 | doc: /* Return buffers previously shown in WINDOW. |
| 1805 | WINDOW must be a live window and defaults to the selected one. |
| 1806 | |
| 1807 | The return value is a list of elements (BUFFER WINDOW-START POS), |
| 1808 | where BUFFER is a buffer, WINDOW-START is the start position of the |
| 1809 | window for that buffer, and POS is a window-specific point value. */) |
| 1810 | (Lisp_Object window) |
| 1811 | { |
| 1812 | return decode_live_window (window)->prev_buffers; |
| 1813 | } |
| 1814 | |
| 1815 | DEFUN ("set-window-prev-buffers", Fset_window_prev_buffers, |
| 1816 | Sset_window_prev_buffers, 2, 2, 0, |
| 1817 | doc: /* Set WINDOW's previous buffers to PREV-BUFFERS. |
| 1818 | WINDOW must be a live window and defaults to the selected one. |
| 1819 | |
| 1820 | PREV-BUFFERS should be a list of elements (BUFFER WINDOW-START POS), |
| 1821 | where BUFFER is a buffer, WINDOW-START is the start position of the |
| 1822 | window for that buffer, and POS is a window-specific point value. */) |
| 1823 | (Lisp_Object window, Lisp_Object prev_buffers) |
| 1824 | { |
| 1825 | wset_prev_buffers (decode_live_window (window), prev_buffers); |
| 1826 | return prev_buffers; |
| 1827 | } |
| 1828 | |
| 1829 | DEFUN ("window-next-buffers", Fwindow_next_buffers, Swindow_next_buffers, |
| 1830 | 0, 1, 0, |
| 1831 | doc: /* Return list of buffers recently re-shown in WINDOW. |
| 1832 | WINDOW must be a live window and defaults to the selected one. */) |
| 1833 | (Lisp_Object window) |
| 1834 | { |
| 1835 | return decode_live_window (window)->next_buffers; |
| 1836 | } |
| 1837 | |
| 1838 | DEFUN ("set-window-next-buffers", Fset_window_next_buffers, |
| 1839 | Sset_window_next_buffers, 2, 2, 0, |
| 1840 | doc: /* Set WINDOW's next buffers to NEXT-BUFFERS. |
| 1841 | WINDOW must be a live window and defaults to the selected one. |
| 1842 | NEXT-BUFFERS should be a list of buffers. */) |
| 1843 | (Lisp_Object window, Lisp_Object next_buffers) |
| 1844 | { |
| 1845 | wset_next_buffers (decode_live_window (window), next_buffers); |
| 1846 | return next_buffers; |
| 1847 | } |
| 1848 | |
| 1849 | DEFUN ("window-parameters", Fwindow_parameters, Swindow_parameters, |
| 1850 | 0, 1, 0, |
| 1851 | doc: /* Return the parameters of WINDOW and their values. |
| 1852 | WINDOW must be a valid window and defaults to the selected one. The |
| 1853 | return value is a list of elements of the form (PARAMETER . VALUE). */) |
| 1854 | (Lisp_Object window) |
| 1855 | { |
| 1856 | return Fcopy_alist (decode_valid_window (window)->window_parameters); |
| 1857 | } |
| 1858 | |
| 1859 | DEFUN ("window-parameter", Fwindow_parameter, Swindow_parameter, |
| 1860 | 2, 2, 0, |
| 1861 | doc: /* Return WINDOW's value for PARAMETER. |
| 1862 | WINDOW can be any window and defaults to the selected one. */) |
| 1863 | (Lisp_Object window, Lisp_Object parameter) |
| 1864 | { |
| 1865 | Lisp_Object result; |
| 1866 | |
| 1867 | result = Fassq (parameter, decode_any_window (window)->window_parameters); |
| 1868 | return CDR_SAFE (result); |
| 1869 | } |
| 1870 | |
| 1871 | DEFUN ("set-window-parameter", Fset_window_parameter, |
| 1872 | Sset_window_parameter, 3, 3, 0, |
| 1873 | doc: /* Set WINDOW's value of PARAMETER to VALUE. |
| 1874 | WINDOW can be any window and defaults to the selected one. |
| 1875 | Return VALUE. */) |
| 1876 | (Lisp_Object window, Lisp_Object parameter, Lisp_Object value) |
| 1877 | { |
| 1878 | register struct window *w = decode_any_window (window); |
| 1879 | Lisp_Object old_alist_elt; |
| 1880 | |
| 1881 | old_alist_elt = Fassq (parameter, w->window_parameters); |
| 1882 | if (NILP (old_alist_elt)) |
| 1883 | wset_window_parameters |
| 1884 | (w, Fcons (Fcons (parameter, value), w->window_parameters)); |
| 1885 | else |
| 1886 | Fsetcdr (old_alist_elt, value); |
| 1887 | return value; |
| 1888 | } |
| 1889 | |
| 1890 | DEFUN ("window-display-table", Fwindow_display_table, Swindow_display_table, |
| 1891 | 0, 1, 0, |
| 1892 | doc: /* Return the display-table that WINDOW is using. |
| 1893 | WINDOW must be a live window and defaults to the selected one. */) |
| 1894 | (Lisp_Object window) |
| 1895 | { |
| 1896 | return decode_live_window (window)->display_table; |
| 1897 | } |
| 1898 | |
| 1899 | /* Get the display table for use on window W. This is either W's |
| 1900 | display table or W's buffer's display table. Ignore the specified |
| 1901 | tables if they are not valid; if no valid table is specified, |
| 1902 | return 0. */ |
| 1903 | |
| 1904 | struct Lisp_Char_Table * |
| 1905 | window_display_table (struct window *w) |
| 1906 | { |
| 1907 | struct Lisp_Char_Table *dp = NULL; |
| 1908 | |
| 1909 | if (DISP_TABLE_P (w->display_table)) |
| 1910 | dp = XCHAR_TABLE (w->display_table); |
| 1911 | else if (BUFFERP (w->contents)) |
| 1912 | { |
| 1913 | struct buffer *b = XBUFFER (w->contents); |
| 1914 | |
| 1915 | if (DISP_TABLE_P (BVAR (b, display_table))) |
| 1916 | dp = XCHAR_TABLE (BVAR (b, display_table)); |
| 1917 | else if (DISP_TABLE_P (Vstandard_display_table)) |
| 1918 | dp = XCHAR_TABLE (Vstandard_display_table); |
| 1919 | } |
| 1920 | |
| 1921 | return dp; |
| 1922 | } |
| 1923 | |
| 1924 | DEFUN ("set-window-display-table", Fset_window_display_table, Sset_window_display_table, 2, 2, 0, |
| 1925 | doc: /* Set WINDOW's display-table to TABLE. |
| 1926 | WINDOW must be a live window and defaults to the selected one. */) |
| 1927 | (register Lisp_Object window, Lisp_Object table) |
| 1928 | { |
| 1929 | wset_display_table (decode_live_window (window), table); |
| 1930 | return table; |
| 1931 | } |
| 1932 | \f |
| 1933 | /* Record info on buffer window W is displaying |
| 1934 | when it is about to cease to display that buffer. */ |
| 1935 | static void |
| 1936 | unshow_buffer (register struct window *w) |
| 1937 | { |
| 1938 | Lisp_Object buf = w->contents; |
| 1939 | struct buffer *b = XBUFFER (buf); |
| 1940 | |
| 1941 | eassert (b == XMARKER (w->pointm)->buffer); |
| 1942 | |
| 1943 | #if 0 |
| 1944 | if (w == XWINDOW (selected_window) |
| 1945 | || ! EQ (buf, XWINDOW (selected_window)->contents)) |
| 1946 | /* Do this except when the selected window's buffer |
| 1947 | is being removed from some other window. */ |
| 1948 | #endif |
| 1949 | /* last_window_start records the start position that this buffer |
| 1950 | had in the last window to be disconnected from it. |
| 1951 | Now that this statement is unconditional, |
| 1952 | it is possible for the buffer to be displayed in the |
| 1953 | selected window, while last_window_start reflects another |
| 1954 | window which was recently showing the same buffer. |
| 1955 | Some people might say that might be a good thing. Let's see. */ |
| 1956 | b->last_window_start = marker_position (w->start); |
| 1957 | |
| 1958 | /* Point in the selected window's buffer |
| 1959 | is actually stored in that buffer, and the window's pointm isn't used. |
| 1960 | So don't clobber point in that buffer. */ |
| 1961 | if (! EQ (buf, XWINDOW (selected_window)->contents) |
| 1962 | /* Don't clobber point in current buffer either (this could be |
| 1963 | useful in connection with bug#12208). |
| 1964 | && XBUFFER (buf) != current_buffer */ |
| 1965 | /* This line helps to fix Horsley's testbug.el bug. */ |
| 1966 | && !(WINDOWP (BVAR (b, last_selected_window)) |
| 1967 | && w != XWINDOW (BVAR (b, last_selected_window)) |
| 1968 | && EQ (buf, XWINDOW (BVAR (b, last_selected_window))->contents))) |
| 1969 | temp_set_point_both (b, |
| 1970 | clip_to_bounds (BUF_BEGV (b), |
| 1971 | marker_position (w->pointm), |
| 1972 | BUF_ZV (b)), |
| 1973 | clip_to_bounds (BUF_BEGV_BYTE (b), |
| 1974 | marker_byte_position (w->pointm), |
| 1975 | BUF_ZV_BYTE (b))); |
| 1976 | |
| 1977 | if (WINDOWP (BVAR (b, last_selected_window)) |
| 1978 | && w == XWINDOW (BVAR (b, last_selected_window))) |
| 1979 | bset_last_selected_window (b, Qnil); |
| 1980 | } |
| 1981 | |
| 1982 | /* Put NEW into the window structure in place of OLD. SETFLAG zero |
| 1983 | means change window structure only. Otherwise store geometry and |
| 1984 | other settings as well. */ |
| 1985 | static void |
| 1986 | replace_window (Lisp_Object old, Lisp_Object new, int setflag) |
| 1987 | { |
| 1988 | register Lisp_Object tem; |
| 1989 | register struct window *o = XWINDOW (old), *n = XWINDOW (new); |
| 1990 | |
| 1991 | /* If OLD is its frame's root window, then NEW is the new |
| 1992 | root window for that frame. */ |
| 1993 | if (EQ (old, FRAME_ROOT_WINDOW (XFRAME (o->frame)))) |
| 1994 | fset_root_window (XFRAME (o->frame), new); |
| 1995 | |
| 1996 | if (setflag) |
| 1997 | { |
| 1998 | n->left_col = o->left_col; |
| 1999 | n->top_line = o->top_line; |
| 2000 | n->total_cols = o->total_cols; |
| 2001 | n->total_lines = o->total_lines; |
| 2002 | wset_normal_cols (n, o->normal_cols); |
| 2003 | wset_normal_cols (o, make_float (1.0)); |
| 2004 | wset_normal_lines (n, o->normal_lines); |
| 2005 | wset_normal_lines (o, make_float (1.0)); |
| 2006 | n->desired_matrix = n->current_matrix = 0; |
| 2007 | n->vscroll = 0; |
| 2008 | memset (&n->cursor, 0, sizeof (n->cursor)); |
| 2009 | memset (&n->phys_cursor, 0, sizeof (n->phys_cursor)); |
| 2010 | n->last_cursor_vpos = 0; |
| 2011 | n->phys_cursor_type = -1; |
| 2012 | n->phys_cursor_width = -1; |
| 2013 | n->must_be_updated_p = 0; |
| 2014 | n->pseudo_window_p = 0; |
| 2015 | n->window_end_vpos = 0; |
| 2016 | n->window_end_pos = 0; |
| 2017 | n->window_end_valid = 0; |
| 2018 | } |
| 2019 | |
| 2020 | tem = o->next; |
| 2021 | wset_next (n, tem); |
| 2022 | if (!NILP (tem)) |
| 2023 | wset_prev (XWINDOW (tem), new); |
| 2024 | |
| 2025 | tem = o->prev; |
| 2026 | wset_prev (n, tem); |
| 2027 | if (!NILP (tem)) |
| 2028 | wset_next (XWINDOW (tem), new); |
| 2029 | |
| 2030 | tem = o->parent; |
| 2031 | wset_parent (n, tem); |
| 2032 | if (!NILP (tem) && EQ (XWINDOW (tem)->contents, old)) |
| 2033 | wset_combination (XWINDOW (tem), XWINDOW (tem)->horizontal, new); |
| 2034 | } |
| 2035 | |
| 2036 | /* If window WINDOW and its parent window are iso-combined, merge |
| 2037 | WINDOW's children into those of its parent window and mark WINDOW as |
| 2038 | deleted. */ |
| 2039 | |
| 2040 | static void |
| 2041 | recombine_windows (Lisp_Object window) |
| 2042 | { |
| 2043 | struct window *w, *p, *c; |
| 2044 | Lisp_Object parent, child; |
| 2045 | bool horflag; |
| 2046 | |
| 2047 | w = XWINDOW (window); |
| 2048 | parent = w->parent; |
| 2049 | if (!NILP (parent) && NILP (w->combination_limit)) |
| 2050 | { |
| 2051 | p = XWINDOW (parent); |
| 2052 | if (WINDOWP (p->contents) && WINDOWP (w->contents) |
| 2053 | && p->horizontal == w->horizontal) |
| 2054 | /* WINDOW and PARENT are both either a vertical or a horizontal |
| 2055 | combination. */ |
| 2056 | { |
| 2057 | horflag = WINDOW_HORIZONTAL_COMBINATION_P (w); |
| 2058 | child = w->contents; |
| 2059 | c = XWINDOW (child); |
| 2060 | |
| 2061 | /* Splice WINDOW's children into its parent's children and |
| 2062 | assign new normal sizes. */ |
| 2063 | if (NILP (w->prev)) |
| 2064 | wset_combination (p, horflag, child); |
| 2065 | else |
| 2066 | { |
| 2067 | wset_prev (c, w->prev); |
| 2068 | wset_next (XWINDOW (w->prev), child); |
| 2069 | } |
| 2070 | |
| 2071 | while (c) |
| 2072 | { |
| 2073 | wset_parent (c, parent); |
| 2074 | |
| 2075 | if (horflag) |
| 2076 | wset_normal_cols (c, |
| 2077 | make_float ((double) c->total_cols |
| 2078 | / (double) p->total_cols)); |
| 2079 | else |
| 2080 | wset_normal_lines (c, |
| 2081 | make_float ((double) c->total_lines |
| 2082 | / (double) p->total_lines)); |
| 2083 | |
| 2084 | if (NILP (c->next)) |
| 2085 | { |
| 2086 | if (!NILP (w->next)) |
| 2087 | { |
| 2088 | wset_next (c, w->next); |
| 2089 | wset_prev (XWINDOW (c->next), child); |
| 2090 | } |
| 2091 | |
| 2092 | c = 0; |
| 2093 | } |
| 2094 | else |
| 2095 | { |
| 2096 | child = c->next; |
| 2097 | c = XWINDOW (child); |
| 2098 | } |
| 2099 | } |
| 2100 | |
| 2101 | /* WINDOW can be deleted now. */ |
| 2102 | wset_combination (w, 0, Qnil); |
| 2103 | } |
| 2104 | } |
| 2105 | } |
| 2106 | |
| 2107 | /* If WINDOW can be deleted, delete it. */ |
| 2108 | static void |
| 2109 | delete_deletable_window (Lisp_Object window) |
| 2110 | { |
| 2111 | if (!NILP (call1 (Qwindow_deletable_p, window))) |
| 2112 | call1 (Qdelete_window, window); |
| 2113 | } |
| 2114 | \f |
| 2115 | /*********************************************************************** |
| 2116 | Window List |
| 2117 | ***********************************************************************/ |
| 2118 | |
| 2119 | /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object |
| 2120 | pointer. This is a callback function for foreach_window, used in |
| 2121 | the window_list function. */ |
| 2122 | |
| 2123 | static int |
| 2124 | add_window_to_list (struct window *w, void *user_data) |
| 2125 | { |
| 2126 | Lisp_Object *list = user_data; |
| 2127 | Lisp_Object window; |
| 2128 | XSETWINDOW (window, w); |
| 2129 | *list = Fcons (window, *list); |
| 2130 | return 1; |
| 2131 | } |
| 2132 | |
| 2133 | |
| 2134 | /* Return a list of all windows, for use by next_window. If |
| 2135 | Vwindow_list is a list, return that list. Otherwise, build a new |
| 2136 | list, cache it in Vwindow_list, and return that. */ |
| 2137 | |
| 2138 | static Lisp_Object |
| 2139 | window_list (void) |
| 2140 | { |
| 2141 | if (!CONSP (Vwindow_list)) |
| 2142 | { |
| 2143 | Lisp_Object tail, frame; |
| 2144 | |
| 2145 | Vwindow_list = Qnil; |
| 2146 | FOR_EACH_FRAME (tail, frame) |
| 2147 | { |
| 2148 | Lisp_Object args[2]; |
| 2149 | |
| 2150 | /* We are visiting windows in canonical order, and add |
| 2151 | new windows at the front of args[1], which means we |
| 2152 | have to reverse this list at the end. */ |
| 2153 | args[1] = Qnil; |
| 2154 | foreach_window (XFRAME (frame), add_window_to_list, &args[1]); |
| 2155 | args[0] = Vwindow_list; |
| 2156 | args[1] = Fnreverse (args[1]); |
| 2157 | Vwindow_list = Fnconc (2, args); |
| 2158 | } |
| 2159 | } |
| 2160 | |
| 2161 | return Vwindow_list; |
| 2162 | } |
| 2163 | |
| 2164 | |
| 2165 | /* Value is non-zero if WINDOW satisfies the constraints given by |
| 2166 | OWINDOW, MINIBUF and ALL_FRAMES. |
| 2167 | |
| 2168 | MINIBUF t means WINDOW may be minibuffer windows. |
| 2169 | `lambda' means WINDOW may not be a minibuffer window. |
| 2170 | a window means a specific minibuffer window |
| 2171 | |
| 2172 | ALL_FRAMES t means search all frames, |
| 2173 | nil means search just current frame, |
| 2174 | `visible' means search just visible frames on the |
| 2175 | current terminal, |
| 2176 | 0 means search visible and iconified frames on the |
| 2177 | current terminal, |
| 2178 | a window means search the frame that window belongs to, |
| 2179 | a frame means consider windows on that frame, only. */ |
| 2180 | |
| 2181 | static bool |
| 2182 | candidate_window_p (Lisp_Object window, Lisp_Object owindow, |
| 2183 | Lisp_Object minibuf, Lisp_Object all_frames) |
| 2184 | { |
| 2185 | struct window *w = XWINDOW (window); |
| 2186 | struct frame *f = XFRAME (w->frame); |
| 2187 | bool candidate_p = 1; |
| 2188 | |
| 2189 | if (!BUFFERP (w->contents)) |
| 2190 | candidate_p = 0; |
| 2191 | else if (MINI_WINDOW_P (w) |
| 2192 | && (EQ (minibuf, Qlambda) |
| 2193 | || (WINDOWP (minibuf) && !EQ (minibuf, window)))) |
| 2194 | { |
| 2195 | /* If MINIBUF is `lambda' don't consider any mini-windows. |
| 2196 | If it is a window, consider only that one. */ |
| 2197 | candidate_p = 0; |
| 2198 | } |
| 2199 | else if (EQ (all_frames, Qt)) |
| 2200 | candidate_p = 1; |
| 2201 | else if (NILP (all_frames)) |
| 2202 | { |
| 2203 | eassert (WINDOWP (owindow)); |
| 2204 | candidate_p = EQ (w->frame, XWINDOW (owindow)->frame); |
| 2205 | } |
| 2206 | else if (EQ (all_frames, Qvisible)) |
| 2207 | { |
| 2208 | candidate_p = FRAME_VISIBLE_P (f) |
| 2209 | && (FRAME_TERMINAL (XFRAME (w->frame)) |
| 2210 | == FRAME_TERMINAL (XFRAME (selected_frame))); |
| 2211 | |
| 2212 | } |
| 2213 | else if (INTEGERP (all_frames) && XINT (all_frames) == 0) |
| 2214 | { |
| 2215 | candidate_p = (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f) |
| 2216 | #ifdef HAVE_X_WINDOWS |
| 2217 | /* Yuck!! If we've just created the frame and the |
| 2218 | window-manager requested the user to place it |
| 2219 | manually, the window may still not be considered |
| 2220 | `visible'. I'd argue it should be at least |
| 2221 | something like `iconified', but don't know how to do |
| 2222 | that yet. --Stef */ |
| 2223 | || (FRAME_X_P (f) && f->output_data.x->asked_for_visible |
| 2224 | && !f->output_data.x->has_been_visible) |
| 2225 | #endif |
| 2226 | ) |
| 2227 | && (FRAME_TERMINAL (XFRAME (w->frame)) |
| 2228 | == FRAME_TERMINAL (XFRAME (selected_frame))); |
| 2229 | } |
| 2230 | else if (WINDOWP (all_frames)) |
| 2231 | candidate_p = (EQ (FRAME_MINIBUF_WINDOW (f), all_frames) |
| 2232 | || EQ (XWINDOW (all_frames)->frame, w->frame) |
| 2233 | || EQ (XWINDOW (all_frames)->frame, FRAME_FOCUS_FRAME (f))); |
| 2234 | else if (FRAMEP (all_frames)) |
| 2235 | candidate_p = EQ (all_frames, w->frame); |
| 2236 | |
| 2237 | return candidate_p; |
| 2238 | } |
| 2239 | |
| 2240 | |
| 2241 | /* Decode arguments as allowed by Fnext_window, Fprevious_window, and |
| 2242 | Fwindow_list. See candidate_window_p for the meaning of WINDOW, |
| 2243 | MINIBUF, and ALL_FRAMES. */ |
| 2244 | |
| 2245 | static void |
| 2246 | decode_next_window_args (Lisp_Object *window, Lisp_Object *minibuf, Lisp_Object *all_frames) |
| 2247 | { |
| 2248 | struct window *w = decode_live_window (*window); |
| 2249 | |
| 2250 | XSETWINDOW (*window, w); |
| 2251 | /* MINIBUF nil may or may not include minibuffers. Decide if it |
| 2252 | does. */ |
| 2253 | if (NILP (*minibuf)) |
| 2254 | *minibuf = minibuf_level ? minibuf_window : Qlambda; |
| 2255 | else if (!EQ (*minibuf, Qt)) |
| 2256 | *minibuf = Qlambda; |
| 2257 | |
| 2258 | /* Now *MINIBUF can be t => count all minibuffer windows, `lambda' |
| 2259 | => count none of them, or a specific minibuffer window (the |
| 2260 | active one) to count. */ |
| 2261 | |
| 2262 | /* ALL_FRAMES nil doesn't specify which frames to include. */ |
| 2263 | if (NILP (*all_frames)) |
| 2264 | *all_frames |
| 2265 | = (!EQ (*minibuf, Qlambda) |
| 2266 | ? FRAME_MINIBUF_WINDOW (XFRAME (w->frame)) |
| 2267 | : Qnil); |
| 2268 | else if (EQ (*all_frames, Qvisible)) |
| 2269 | ; |
| 2270 | else if (EQ (*all_frames, make_number (0))) |
| 2271 | ; |
| 2272 | else if (FRAMEP (*all_frames)) |
| 2273 | ; |
| 2274 | else if (!EQ (*all_frames, Qt)) |
| 2275 | *all_frames = Qnil; |
| 2276 | } |
| 2277 | |
| 2278 | |
| 2279 | /* Return the next or previous window of WINDOW in cyclic ordering |
| 2280 | of windows. NEXT_P non-zero means return the next window. See the |
| 2281 | documentation string of next-window for the meaning of MINIBUF and |
| 2282 | ALL_FRAMES. */ |
| 2283 | |
| 2284 | static Lisp_Object |
| 2285 | next_window (Lisp_Object window, Lisp_Object minibuf, Lisp_Object all_frames, int next_p) |
| 2286 | { |
| 2287 | decode_next_window_args (&window, &minibuf, &all_frames); |
| 2288 | |
| 2289 | /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just |
| 2290 | return the first window on the frame. */ |
| 2291 | if (FRAMEP (all_frames) |
| 2292 | && !EQ (all_frames, XWINDOW (window)->frame)) |
| 2293 | return Fframe_first_window (all_frames); |
| 2294 | |
| 2295 | if (next_p) |
| 2296 | { |
| 2297 | Lisp_Object list; |
| 2298 | |
| 2299 | /* Find WINDOW in the list of all windows. */ |
| 2300 | list = Fmemq (window, window_list ()); |
| 2301 | |
| 2302 | /* Scan forward from WINDOW to the end of the window list. */ |
| 2303 | if (CONSP (list)) |
| 2304 | for (list = XCDR (list); CONSP (list); list = XCDR (list)) |
| 2305 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
| 2306 | break; |
| 2307 | |
| 2308 | /* Scan from the start of the window list up to WINDOW. */ |
| 2309 | if (!CONSP (list)) |
| 2310 | for (list = Vwindow_list; |
| 2311 | CONSP (list) && !EQ (XCAR (list), window); |
| 2312 | list = XCDR (list)) |
| 2313 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
| 2314 | break; |
| 2315 | |
| 2316 | if (CONSP (list)) |
| 2317 | window = XCAR (list); |
| 2318 | } |
| 2319 | else |
| 2320 | { |
| 2321 | Lisp_Object candidate, list; |
| 2322 | |
| 2323 | /* Scan through the list of windows for candidates. If there are |
| 2324 | candidate windows in front of WINDOW, the last one of these |
| 2325 | is the one we want. If there are candidates following WINDOW |
| 2326 | in the list, again the last one of these is the one we want. */ |
| 2327 | candidate = Qnil; |
| 2328 | for (list = window_list (); CONSP (list); list = XCDR (list)) |
| 2329 | { |
| 2330 | if (EQ (XCAR (list), window)) |
| 2331 | { |
| 2332 | if (WINDOWP (candidate)) |
| 2333 | break; |
| 2334 | } |
| 2335 | else if (candidate_window_p (XCAR (list), window, minibuf, |
| 2336 | all_frames)) |
| 2337 | candidate = XCAR (list); |
| 2338 | } |
| 2339 | |
| 2340 | if (WINDOWP (candidate)) |
| 2341 | window = candidate; |
| 2342 | } |
| 2343 | |
| 2344 | return window; |
| 2345 | } |
| 2346 | |
| 2347 | |
| 2348 | DEFUN ("next-window", Fnext_window, Snext_window, 0, 3, 0, |
| 2349 | doc: /* Return live window after WINDOW in the cyclic ordering of windows. |
| 2350 | WINDOW must be a live window and defaults to the selected one. The |
| 2351 | optional arguments MINIBUF and ALL-FRAMES specify the set of windows to |
| 2352 | consider. |
| 2353 | |
| 2354 | MINIBUF nil or omitted means consider the minibuffer window only if the |
| 2355 | minibuffer is active. MINIBUF t means consider the minibuffer window |
| 2356 | even if the minibuffer is not active. Any other value means do not |
| 2357 | consider the minibuffer window even if the minibuffer is active. |
| 2358 | |
| 2359 | ALL-FRAMES nil or omitted means consider all windows on WINDOW's frame, |
| 2360 | plus the minibuffer window if specified by the MINIBUF argument. If the |
| 2361 | minibuffer counts, consider all windows on all frames that share that |
| 2362 | minibuffer too. The following non-nil values of ALL-FRAMES have special |
| 2363 | meanings: |
| 2364 | |
| 2365 | - t means consider all windows on all existing frames. |
| 2366 | |
| 2367 | - `visible' means consider all windows on all visible frames. |
| 2368 | |
| 2369 | - 0 (the number zero) means consider all windows on all visible and |
| 2370 | iconified frames. |
| 2371 | |
| 2372 | - A frame means consider all windows on that frame only. |
| 2373 | |
| 2374 | Anything else means consider all windows on WINDOW's frame and no |
| 2375 | others. |
| 2376 | |
| 2377 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use |
| 2378 | `next-window' to iterate through the entire cycle of acceptable |
| 2379 | windows, eventually ending up back at the window you started with. |
| 2380 | `previous-window' traverses the same cycle, in the reverse order. */) |
| 2381 | (Lisp_Object window, Lisp_Object minibuf, Lisp_Object all_frames) |
| 2382 | { |
| 2383 | return next_window (window, minibuf, all_frames, 1); |
| 2384 | } |
| 2385 | |
| 2386 | |
| 2387 | DEFUN ("previous-window", Fprevious_window, Sprevious_window, 0, 3, 0, |
| 2388 | doc: /* Return live window before WINDOW in the cyclic ordering of windows. |
| 2389 | WINDOW must be a live window and defaults to the selected one. The |
| 2390 | optional arguments MINIBUF and ALL-FRAMES specify the set of windows to |
| 2391 | consider. |
| 2392 | |
| 2393 | MINIBUF nil or omitted means consider the minibuffer window only if the |
| 2394 | minibuffer is active. MINIBUF t means consider the minibuffer window |
| 2395 | even if the minibuffer is not active. Any other value means do not |
| 2396 | consider the minibuffer window even if the minibuffer is active. |
| 2397 | |
| 2398 | ALL-FRAMES nil or omitted means consider all windows on WINDOW's frame, |
| 2399 | plus the minibuffer window if specified by the MINIBUF argument. If the |
| 2400 | minibuffer counts, consider all windows on all frames that share that |
| 2401 | minibuffer too. The following non-nil values of ALL-FRAMES have special |
| 2402 | meanings: |
| 2403 | |
| 2404 | - t means consider all windows on all existing frames. |
| 2405 | |
| 2406 | - `visible' means consider all windows on all visible frames. |
| 2407 | |
| 2408 | - 0 (the number zero) means consider all windows on all visible and |
| 2409 | iconified frames. |
| 2410 | |
| 2411 | - A frame means consider all windows on that frame only. |
| 2412 | |
| 2413 | Anything else means consider all windows on WINDOW's frame and no |
| 2414 | others. |
| 2415 | |
| 2416 | If you use consistent values for MINIBUF and ALL-FRAMES, you can |
| 2417 | use `previous-window' to iterate through the entire cycle of |
| 2418 | acceptable windows, eventually ending up back at the window you |
| 2419 | started with. `next-window' traverses the same cycle, in the |
| 2420 | reverse order. */) |
| 2421 | (Lisp_Object window, Lisp_Object minibuf, Lisp_Object all_frames) |
| 2422 | { |
| 2423 | return next_window (window, minibuf, all_frames, 0); |
| 2424 | } |
| 2425 | |
| 2426 | |
| 2427 | /* Return a list of windows in cyclic ordering. Arguments are like |
| 2428 | for `next-window'. */ |
| 2429 | |
| 2430 | static Lisp_Object |
| 2431 | window_list_1 (Lisp_Object window, Lisp_Object minibuf, Lisp_Object all_frames) |
| 2432 | { |
| 2433 | Lisp_Object tail, list, rest; |
| 2434 | |
| 2435 | decode_next_window_args (&window, &minibuf, &all_frames); |
| 2436 | list = Qnil; |
| 2437 | |
| 2438 | for (tail = window_list (); CONSP (tail); tail = XCDR (tail)) |
| 2439 | if (candidate_window_p (XCAR (tail), window, minibuf, all_frames)) |
| 2440 | list = Fcons (XCAR (tail), list); |
| 2441 | |
| 2442 | /* Rotate the list to start with WINDOW. */ |
| 2443 | list = Fnreverse (list); |
| 2444 | rest = Fmemq (window, list); |
| 2445 | if (!NILP (rest) && !EQ (rest, list)) |
| 2446 | { |
| 2447 | for (tail = list; !EQ (XCDR (tail), rest); tail = XCDR (tail)) |
| 2448 | ; |
| 2449 | XSETCDR (tail, Qnil); |
| 2450 | list = nconc2 (rest, list); |
| 2451 | } |
| 2452 | return list; |
| 2453 | } |
| 2454 | |
| 2455 | |
| 2456 | DEFUN ("window-list", Fwindow_list, Swindow_list, 0, 3, 0, |
| 2457 | doc: /* Return a list of windows on FRAME, starting with WINDOW. |
| 2458 | FRAME nil or omitted means use the selected frame. |
| 2459 | WINDOW nil or omitted means use the window selected within FRAME. |
| 2460 | MINIBUF t means include the minibuffer window, even if it isn't active. |
| 2461 | MINIBUF nil or omitted means include the minibuffer window only |
| 2462 | if it's active. |
| 2463 | MINIBUF neither nil nor t means never include the minibuffer window. */) |
| 2464 | (Lisp_Object frame, Lisp_Object minibuf, Lisp_Object window) |
| 2465 | { |
| 2466 | if (NILP (window)) |
| 2467 | window = FRAMEP (frame) ? XFRAME (frame)->selected_window : selected_window; |
| 2468 | CHECK_WINDOW (window); |
| 2469 | if (NILP (frame)) |
| 2470 | frame = selected_frame; |
| 2471 | |
| 2472 | if (!EQ (frame, XWINDOW (window)->frame)) |
| 2473 | error ("Window is on a different frame"); |
| 2474 | |
| 2475 | return window_list_1 (window, minibuf, frame); |
| 2476 | } |
| 2477 | |
| 2478 | |
| 2479 | DEFUN ("window-list-1", Fwindow_list_1, Swindow_list_1, 0, 3, 0, |
| 2480 | doc: /* Return a list of all live windows. |
| 2481 | WINDOW specifies the first window to list and defaults to the selected |
| 2482 | window. |
| 2483 | |
| 2484 | Optional argument MINIBUF nil or omitted means consider the minibuffer |
| 2485 | window only if the minibuffer is active. MINIBUF t means consider the |
| 2486 | minibuffer window even if the minibuffer is not active. Any other value |
| 2487 | means do not consider the minibuffer window even if the minibuffer is |
| 2488 | active. |
| 2489 | |
| 2490 | Optional argument ALL-FRAMES nil or omitted means consider all windows |
| 2491 | on WINDOW's frame, plus the minibuffer window if specified by the |
| 2492 | MINIBUF argument. If the minibuffer counts, consider all windows on all |
| 2493 | frames that share that minibuffer too. The following non-nil values of |
| 2494 | ALL-FRAMES have special meanings: |
| 2495 | |
| 2496 | - t means consider all windows on all existing frames. |
| 2497 | |
| 2498 | - `visible' means consider all windows on all visible frames. |
| 2499 | |
| 2500 | - 0 (the number zero) means consider all windows on all visible and |
| 2501 | iconified frames. |
| 2502 | |
| 2503 | - A frame means consider all windows on that frame only. |
| 2504 | |
| 2505 | Anything else means consider all windows on WINDOW's frame and no |
| 2506 | others. |
| 2507 | |
| 2508 | If WINDOW is not on the list of windows returned, some other window will |
| 2509 | be listed first but no error is signaled. */) |
| 2510 | (Lisp_Object window, Lisp_Object minibuf, Lisp_Object all_frames) |
| 2511 | { |
| 2512 | return window_list_1 (window, minibuf, all_frames); |
| 2513 | } |
| 2514 | \f |
| 2515 | /* Look at all windows, performing an operation specified by TYPE |
| 2516 | with argument OBJ. |
| 2517 | If FRAMES is Qt, look at all frames; |
| 2518 | Qnil, look at just the selected frame; |
| 2519 | Qvisible, look at visible frames; |
| 2520 | a frame, just look at windows on that frame. |
| 2521 | If MINI is non-zero, perform the operation on minibuffer windows too. */ |
| 2522 | |
| 2523 | enum window_loop |
| 2524 | { |
| 2525 | WINDOW_LOOP_UNUSED, |
| 2526 | GET_BUFFER_WINDOW, /* Arg is buffer */ |
| 2527 | REPLACE_BUFFER_IN_WINDOWS_SAFELY, /* Arg is buffer */ |
| 2528 | REDISPLAY_BUFFER_WINDOWS, /* Arg is buffer */ |
| 2529 | CHECK_ALL_WINDOWS /* Arg is ignored */ |
| 2530 | }; |
| 2531 | |
| 2532 | static Lisp_Object |
| 2533 | window_loop (enum window_loop type, Lisp_Object obj, int mini, Lisp_Object frames) |
| 2534 | { |
| 2535 | Lisp_Object window, windows, best_window, frame_arg; |
| 2536 | int frame_best_window_flag = 0; |
| 2537 | struct frame *f; |
| 2538 | struct gcpro gcpro1; |
| 2539 | |
| 2540 | /* If we're only looping through windows on a particular frame, |
| 2541 | frame points to that frame. If we're looping through windows |
| 2542 | on all frames, frame is 0. */ |
| 2543 | if (FRAMEP (frames)) |
| 2544 | f = XFRAME (frames); |
| 2545 | else if (NILP (frames)) |
| 2546 | f = SELECTED_FRAME (); |
| 2547 | else |
| 2548 | f = NULL; |
| 2549 | |
| 2550 | if (f) |
| 2551 | frame_arg = Qlambda; |
| 2552 | else if (EQ (frames, make_number (0))) |
| 2553 | frame_arg = frames; |
| 2554 | else if (EQ (frames, Qvisible)) |
| 2555 | frame_arg = frames; |
| 2556 | else |
| 2557 | frame_arg = Qt; |
| 2558 | |
| 2559 | /* frame_arg is Qlambda to stick to one frame, |
| 2560 | Qvisible to consider all visible frames, |
| 2561 | or Qt otherwise. */ |
| 2562 | |
| 2563 | /* Pick a window to start with. */ |
| 2564 | if (WINDOWP (obj)) |
| 2565 | window = obj; |
| 2566 | else if (f) |
| 2567 | window = FRAME_SELECTED_WINDOW (f); |
| 2568 | else |
| 2569 | window = FRAME_SELECTED_WINDOW (SELECTED_FRAME ()); |
| 2570 | |
| 2571 | windows = window_list_1 (window, mini ? Qt : Qnil, frame_arg); |
| 2572 | GCPRO1 (windows); |
| 2573 | best_window = Qnil; |
| 2574 | |
| 2575 | for (; CONSP (windows); windows = XCDR (windows)) |
| 2576 | { |
| 2577 | struct window *w; |
| 2578 | |
| 2579 | window = XCAR (windows); |
| 2580 | w = XWINDOW (window); |
| 2581 | |
| 2582 | /* Note that we do not pay attention here to whether the frame |
| 2583 | is visible, since Fwindow_list skips non-visible frames if |
| 2584 | that is desired, under the control of frame_arg. */ |
| 2585 | if (!MINI_WINDOW_P (w) |
| 2586 | /* For REPLACE_BUFFER_IN_WINDOWS_SAFELY, we must always |
| 2587 | consider all windows. */ |
| 2588 | || type == REPLACE_BUFFER_IN_WINDOWS_SAFELY |
| 2589 | || (mini && minibuf_level > 0)) |
| 2590 | switch (type) |
| 2591 | { |
| 2592 | case GET_BUFFER_WINDOW: |
| 2593 | if (EQ (w->contents, obj) |
| 2594 | /* Don't find any minibuffer window except the one that |
| 2595 | is currently in use. */ |
| 2596 | && (MINI_WINDOW_P (w) ? EQ (window, minibuf_window) : 1)) |
| 2597 | { |
| 2598 | if (EQ (window, selected_window)) |
| 2599 | /* Preferably return the selected window. */ |
| 2600 | RETURN_UNGCPRO (window); |
| 2601 | else if (EQ (XWINDOW (window)->frame, selected_frame) |
| 2602 | && !frame_best_window_flag) |
| 2603 | /* Prefer windows on the current frame (but don't |
| 2604 | choose another one if we have one already). */ |
| 2605 | { |
| 2606 | best_window = window; |
| 2607 | frame_best_window_flag = 1; |
| 2608 | } |
| 2609 | else if (NILP (best_window)) |
| 2610 | best_window = window; |
| 2611 | } |
| 2612 | break; |
| 2613 | |
| 2614 | case REPLACE_BUFFER_IN_WINDOWS_SAFELY: |
| 2615 | /* We could simply check whether the buffer shown by window |
| 2616 | is live, and show another buffer in case it isn't. */ |
| 2617 | if (EQ (w->contents, obj)) |
| 2618 | { |
| 2619 | /* Undedicate WINDOW. */ |
| 2620 | wset_dedicated (w, Qnil); |
| 2621 | /* Make WINDOW show the buffer returned by |
| 2622 | other_buffer_safely, don't run any hooks. */ |
| 2623 | set_window_buffer |
| 2624 | (window, other_buffer_safely (w->contents), 0, 0); |
| 2625 | /* If WINDOW is the selected window, make its buffer |
| 2626 | current. But do so only if the window shows the |
| 2627 | current buffer (Bug#6454). */ |
| 2628 | if (EQ (window, selected_window) |
| 2629 | && XBUFFER (w->contents) == current_buffer) |
| 2630 | Fset_buffer (w->contents); |
| 2631 | } |
| 2632 | break; |
| 2633 | |
| 2634 | case REDISPLAY_BUFFER_WINDOWS: |
| 2635 | if (EQ (w->contents, obj)) |
| 2636 | { |
| 2637 | mark_window_display_accurate (window, 0); |
| 2638 | w->update_mode_line = 1; |
| 2639 | XBUFFER (obj)->prevent_redisplay_optimizations_p = 1; |
| 2640 | ++update_mode_lines; |
| 2641 | best_window = window; |
| 2642 | } |
| 2643 | break; |
| 2644 | |
| 2645 | /* Check for a leaf window that has a killed buffer |
| 2646 | or broken markers. */ |
| 2647 | case CHECK_ALL_WINDOWS: |
| 2648 | if (BUFFERP (w->contents)) |
| 2649 | { |
| 2650 | struct buffer *b = XBUFFER (w->contents); |
| 2651 | |
| 2652 | if (!BUFFER_LIVE_P (b)) |
| 2653 | emacs_abort (); |
| 2654 | if (!MARKERP (w->start) || XMARKER (w->start)->buffer != b) |
| 2655 | emacs_abort (); |
| 2656 | if (!MARKERP (w->pointm) || XMARKER (w->pointm)->buffer != b) |
| 2657 | emacs_abort (); |
| 2658 | } |
| 2659 | break; |
| 2660 | |
| 2661 | case WINDOW_LOOP_UNUSED: |
| 2662 | break; |
| 2663 | } |
| 2664 | } |
| 2665 | |
| 2666 | UNGCPRO; |
| 2667 | return best_window; |
| 2668 | } |
| 2669 | |
| 2670 | /* Used for debugging. Abort if any window has a dead buffer. */ |
| 2671 | |
| 2672 | extern void check_all_windows (void) EXTERNALLY_VISIBLE; |
| 2673 | void |
| 2674 | check_all_windows (void) |
| 2675 | { |
| 2676 | window_loop (CHECK_ALL_WINDOWS, Qnil, 1, Qt); |
| 2677 | } |
| 2678 | |
| 2679 | DEFUN ("get-buffer-window", Fget_buffer_window, Sget_buffer_window, 0, 2, 0, |
| 2680 | doc: /* Return a window currently displaying BUFFER-OR-NAME, or nil if none. |
| 2681 | BUFFER-OR-NAME may be a buffer or a buffer name and defaults to |
| 2682 | the current buffer. |
| 2683 | |
| 2684 | The optional argument ALL-FRAMES specifies the frames to consider: |
| 2685 | |
| 2686 | - t means consider all windows on all existing frames. |
| 2687 | |
| 2688 | - `visible' means consider all windows on all visible frames. |
| 2689 | |
| 2690 | - 0 (the number zero) means consider all windows on all visible |
| 2691 | and iconified frames. |
| 2692 | |
| 2693 | - A frame means consider all windows on that frame only. |
| 2694 | |
| 2695 | Any other value of ALL-FRAMES means consider all windows on the |
| 2696 | selected frame and no others. */) |
| 2697 | (Lisp_Object buffer_or_name, Lisp_Object all_frames) |
| 2698 | { |
| 2699 | Lisp_Object buffer; |
| 2700 | |
| 2701 | if (NILP (buffer_or_name)) |
| 2702 | buffer = Fcurrent_buffer (); |
| 2703 | else |
| 2704 | buffer = Fget_buffer (buffer_or_name); |
| 2705 | |
| 2706 | if (BUFFERP (buffer)) |
| 2707 | return window_loop (GET_BUFFER_WINDOW, buffer, 1, all_frames); |
| 2708 | else |
| 2709 | return Qnil; |
| 2710 | } |
| 2711 | |
| 2712 | static Lisp_Object |
| 2713 | resize_root_window (Lisp_Object window, Lisp_Object delta, Lisp_Object horizontal, Lisp_Object ignore) |
| 2714 | { |
| 2715 | return call4 (Qwindow_resize_root_window, window, delta, horizontal, ignore); |
| 2716 | } |
| 2717 | |
| 2718 | |
| 2719 | DEFUN ("delete-other-windows-internal", Fdelete_other_windows_internal, |
| 2720 | Sdelete_other_windows_internal, 0, 2, "", |
| 2721 | doc: /* Make WINDOW fill its frame. |
| 2722 | Only the frame WINDOW is on is affected. WINDOW must be a valid window |
| 2723 | and defaults to the selected one. |
| 2724 | |
| 2725 | Optional argument ROOT, if non-nil, must specify an internal window such |
| 2726 | that WINDOW is in its window subtree. If this is the case, replace ROOT |
| 2727 | by WINDOW and leave alone any windows not part of ROOT's subtree. |
| 2728 | |
| 2729 | When WINDOW is live try to reduce display jumps by keeping the text |
| 2730 | previously visible in WINDOW in the same place on the frame. Doing this |
| 2731 | depends on the value of (window-start WINDOW), so if calling this |
| 2732 | function in a program gives strange scrolling, make sure the |
| 2733 | window-start value is reasonable when this function is called. */) |
| 2734 | (Lisp_Object window, Lisp_Object root) |
| 2735 | { |
| 2736 | struct window *w, *r, *s; |
| 2737 | struct frame *f; |
| 2738 | Lisp_Object sibling, pwindow, swindow IF_LINT (= Qnil), delta; |
| 2739 | ptrdiff_t startpos IF_LINT (= 0), startbyte IF_LINT (= 0); |
| 2740 | int top IF_LINT (= 0), new_top, resize_failed; |
| 2741 | |
| 2742 | w = decode_valid_window (window); |
| 2743 | XSETWINDOW (window, w); |
| 2744 | f = XFRAME (w->frame); |
| 2745 | |
| 2746 | if (NILP (root)) |
| 2747 | /* ROOT is the frame's root window. */ |
| 2748 | { |
| 2749 | root = FRAME_ROOT_WINDOW (f); |
| 2750 | r = XWINDOW (root); |
| 2751 | } |
| 2752 | else |
| 2753 | /* ROOT must be an ancestor of WINDOW. */ |
| 2754 | { |
| 2755 | r = decode_valid_window (root); |
| 2756 | pwindow = XWINDOW (window)->parent; |
| 2757 | while (!NILP (pwindow)) |
| 2758 | if (EQ (pwindow, root)) |
| 2759 | break; |
| 2760 | else |
| 2761 | pwindow = XWINDOW (pwindow)->parent; |
| 2762 | if (!EQ (pwindow, root)) |
| 2763 | error ("Specified root is not an ancestor of specified window"); |
| 2764 | } |
| 2765 | |
| 2766 | if (EQ (window, root)) |
| 2767 | /* A noop. */ |
| 2768 | return Qnil; |
| 2769 | /* I don't understand the "top > 0" part below. If we deal with a |
| 2770 | standalone minibuffer it would have been caught by the preceding |
| 2771 | test. */ |
| 2772 | else if (MINI_WINDOW_P (w)) /* && top > 0) */ |
| 2773 | error ("Can't expand minibuffer to full frame"); |
| 2774 | |
| 2775 | if (BUFFERP (w->contents)) |
| 2776 | { |
| 2777 | startpos = marker_position (w->start); |
| 2778 | startbyte = marker_byte_position (w->start); |
| 2779 | top = WINDOW_TOP_EDGE_LINE (w) |
| 2780 | - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
| 2781 | /* Make sure WINDOW is the frame's selected window. */ |
| 2782 | if (!EQ (window, FRAME_SELECTED_WINDOW (f))) |
| 2783 | { |
| 2784 | if (EQ (selected_frame, w->frame)) |
| 2785 | Fselect_window (window, Qnil); |
| 2786 | else |
| 2787 | fset_selected_window (f, window); |
| 2788 | } |
| 2789 | } |
| 2790 | else |
| 2791 | { |
| 2792 | /* See if the frame's selected window is a part of the window |
| 2793 | subtree rooted at WINDOW, by finding all the selected window's |
| 2794 | parents and comparing each one with WINDOW. If it isn't we |
| 2795 | need a new selected window for this frame. */ |
| 2796 | swindow = FRAME_SELECTED_WINDOW (f); |
| 2797 | while (1) |
| 2798 | { |
| 2799 | pwindow = swindow; |
| 2800 | while (!NILP (pwindow) && !EQ (window, pwindow)) |
| 2801 | pwindow = XWINDOW (pwindow)->parent; |
| 2802 | |
| 2803 | if (EQ (window, pwindow)) |
| 2804 | /* If WINDOW is an ancestor of SWINDOW, then SWINDOW is ok |
| 2805 | as the new selected window. */ |
| 2806 | break; |
| 2807 | else |
| 2808 | /* Else try the previous window of SWINDOW. */ |
| 2809 | swindow = Fprevious_window (swindow, Qlambda, Qnil); |
| 2810 | } |
| 2811 | |
| 2812 | if (!EQ (swindow, FRAME_SELECTED_WINDOW (f))) |
| 2813 | { |
| 2814 | if (EQ (selected_frame, w->frame)) |
| 2815 | Fselect_window (swindow, Qnil); |
| 2816 | else |
| 2817 | fset_selected_window (f, swindow); |
| 2818 | } |
| 2819 | } |
| 2820 | |
| 2821 | block_input (); |
| 2822 | if (!FRAME_INITIAL_P (f)) |
| 2823 | { |
| 2824 | Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f); |
| 2825 | |
| 2826 | /* We are going to free the glyph matrices of WINDOW, and with |
| 2827 | that we might lose any information about glyph rows that have |
| 2828 | some of their glyphs highlighted in mouse face. (These rows |
| 2829 | are marked with a non-zero mouse_face_p flag.) If WINDOW |
| 2830 | indeed has some glyphs highlighted in mouse face, signal to |
| 2831 | frame's up-to-date hook that mouse highlight was overwritten, |
| 2832 | so that it will arrange for redisplaying the highlight. */ |
| 2833 | if (EQ (hlinfo->mouse_face_window, window)) |
| 2834 | reset_mouse_highlight (hlinfo); |
| 2835 | } |
| 2836 | free_window_matrices (r); |
| 2837 | |
| 2838 | windows_or_buffers_changed++; |
| 2839 | Vwindow_list = Qnil; |
| 2840 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 2841 | resize_failed = 0; |
| 2842 | |
| 2843 | if (!WINDOW_LEAF_P (w)) |
| 2844 | { |
| 2845 | /* Resize child windows vertically. */ |
| 2846 | XSETINT (delta, r->total_lines - w->total_lines); |
| 2847 | w->top_line = r->top_line; |
| 2848 | resize_root_window (window, delta, Qnil, Qnil); |
| 2849 | if (window_resize_check (w, 0)) |
| 2850 | window_resize_apply (w, 0); |
| 2851 | else |
| 2852 | { |
| 2853 | resize_root_window (window, delta, Qnil, Qt); |
| 2854 | if (window_resize_check (w, 0)) |
| 2855 | window_resize_apply (w, 0); |
| 2856 | else |
| 2857 | resize_failed = 1; |
| 2858 | } |
| 2859 | |
| 2860 | /* Resize child windows horizontally. */ |
| 2861 | if (!resize_failed) |
| 2862 | { |
| 2863 | w->left_col = r->left_col; |
| 2864 | XSETINT (delta, r->total_cols - w->total_cols); |
| 2865 | resize_root_window (window, delta, Qt, Qnil); |
| 2866 | if (window_resize_check (w, 1)) |
| 2867 | window_resize_apply (w, 1); |
| 2868 | else |
| 2869 | { |
| 2870 | resize_root_window (window, delta, Qt, Qt); |
| 2871 | if (window_resize_check (w, 1)) |
| 2872 | window_resize_apply (w, 1); |
| 2873 | else |
| 2874 | resize_failed = 1; |
| 2875 | } |
| 2876 | } |
| 2877 | |
| 2878 | if (resize_failed) |
| 2879 | /* Play safe, if we still can ... */ |
| 2880 | { |
| 2881 | window = swindow; |
| 2882 | w = XWINDOW (window); |
| 2883 | } |
| 2884 | } |
| 2885 | |
| 2886 | /* Cleanly unlink WINDOW from window-tree. */ |
| 2887 | if (!NILP (w->prev)) |
| 2888 | /* Get SIBLING above (on the left of) WINDOW. */ |
| 2889 | { |
| 2890 | sibling = w->prev; |
| 2891 | s = XWINDOW (sibling); |
| 2892 | wset_next (s, w->next); |
| 2893 | if (!NILP (s->next)) |
| 2894 | wset_prev (XWINDOW (s->next), sibling); |
| 2895 | } |
| 2896 | else |
| 2897 | /* Get SIBLING below (on the right of) WINDOW. */ |
| 2898 | { |
| 2899 | sibling = w->next; |
| 2900 | s = XWINDOW (sibling); |
| 2901 | wset_prev (s, Qnil); |
| 2902 | wset_combination (XWINDOW (w->parent), |
| 2903 | XWINDOW (w->parent)->horizontal, sibling); |
| 2904 | } |
| 2905 | |
| 2906 | /* Delete ROOT and all child windows of ROOT. */ |
| 2907 | if (WINDOWP (r->contents)) |
| 2908 | { |
| 2909 | delete_all_child_windows (r->contents); |
| 2910 | wset_combination (r, 0, Qnil); |
| 2911 | } |
| 2912 | |
| 2913 | replace_window (root, window, 1); |
| 2914 | |
| 2915 | /* This must become SWINDOW anyway ....... */ |
| 2916 | if (BUFFERP (w->contents) && !resize_failed) |
| 2917 | { |
| 2918 | /* Try to minimize scrolling, by setting the window start to the |
| 2919 | point will cause the text at the old window start to be at the |
| 2920 | same place on the frame. But don't try to do this if the |
| 2921 | window start is outside the visible portion (as might happen |
| 2922 | when the display is not current, due to typeahead). */ |
| 2923 | new_top = WINDOW_TOP_EDGE_LINE (w) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
| 2924 | if (new_top != top |
| 2925 | && startpos >= BUF_BEGV (XBUFFER (w->contents)) |
| 2926 | && startpos <= BUF_ZV (XBUFFER (w->contents))) |
| 2927 | { |
| 2928 | struct position pos; |
| 2929 | struct buffer *obuf = current_buffer; |
| 2930 | |
| 2931 | Fset_buffer (w->contents); |
| 2932 | /* This computation used to temporarily move point, but that |
| 2933 | can have unwanted side effects due to text properties. */ |
| 2934 | pos = *vmotion (startpos, startbyte, -top, w); |
| 2935 | |
| 2936 | set_marker_both (w->start, w->contents, pos.bufpos, pos.bytepos); |
| 2937 | w->window_end_valid = 0; |
| 2938 | w->start_at_line_beg = (pos.bytepos == BEGV_BYTE |
| 2939 | || FETCH_BYTE (pos.bytepos - 1) == '\n'); |
| 2940 | /* We need to do this, so that the window-scroll-functions |
| 2941 | get called. */ |
| 2942 | w->optional_new_start = 1; |
| 2943 | |
| 2944 | set_buffer_internal (obuf); |
| 2945 | } |
| 2946 | } |
| 2947 | |
| 2948 | adjust_frame_glyphs (f); |
| 2949 | unblock_input (); |
| 2950 | |
| 2951 | run_window_configuration_change_hook (f); |
| 2952 | |
| 2953 | return Qnil; |
| 2954 | } |
| 2955 | |
| 2956 | |
| 2957 | void |
| 2958 | replace_buffer_in_windows (Lisp_Object buffer) |
| 2959 | { |
| 2960 | call1 (Qreplace_buffer_in_windows, buffer); |
| 2961 | } |
| 2962 | |
| 2963 | /* If BUFFER is shown in a window, safely replace it with some other |
| 2964 | buffer in all windows of all frames, even those on other keyboards. */ |
| 2965 | |
| 2966 | void |
| 2967 | replace_buffer_in_windows_safely (Lisp_Object buffer) |
| 2968 | { |
| 2969 | if (buffer_window_count (XBUFFER (buffer))) |
| 2970 | { |
| 2971 | Lisp_Object tail, frame; |
| 2972 | |
| 2973 | /* A single call to window_loop won't do the job because it only |
| 2974 | considers frames on the current keyboard. So loop manually over |
| 2975 | frames, and handle each one. */ |
| 2976 | FOR_EACH_FRAME (tail, frame) |
| 2977 | window_loop (REPLACE_BUFFER_IN_WINDOWS_SAFELY, buffer, 1, frame); |
| 2978 | } |
| 2979 | } |
| 2980 | |
| 2981 | /* If *ROWS or *COLS are too small a size for FRAME, set them to the |
| 2982 | minimum allowable size. */ |
| 2983 | |
| 2984 | void |
| 2985 | check_frame_size (struct frame *frame, int *rows, int *cols) |
| 2986 | { |
| 2987 | /* For height, we have to see: |
| 2988 | how many windows the frame has at minimum (one or two), |
| 2989 | and whether it has a menu bar or other special stuff at the top. */ |
| 2990 | int min_height |
| 2991 | = ((FRAME_MINIBUF_ONLY_P (frame) || ! FRAME_HAS_MINIBUF_P (frame)) |
| 2992 | ? MIN_SAFE_WINDOW_HEIGHT |
| 2993 | : 2 * MIN_SAFE_WINDOW_HEIGHT); |
| 2994 | |
| 2995 | if (FRAME_TOP_MARGIN (frame) > 0) |
| 2996 | min_height += FRAME_TOP_MARGIN (frame); |
| 2997 | |
| 2998 | if (*rows < min_height) |
| 2999 | *rows = min_height; |
| 3000 | if (*cols < MIN_SAFE_WINDOW_WIDTH) |
| 3001 | *cols = MIN_SAFE_WINDOW_WIDTH; |
| 3002 | } |
| 3003 | |
| 3004 | /* Adjust the margins of window W if text area is too small. |
| 3005 | Return 1 if window width is ok after adjustment; 0 if window |
| 3006 | is still too narrow. */ |
| 3007 | |
| 3008 | static int |
| 3009 | adjust_window_margins (struct window *w) |
| 3010 | { |
| 3011 | int box_cols = (WINDOW_TOTAL_COLS (w) |
| 3012 | - WINDOW_FRINGE_COLS (w) |
| 3013 | - WINDOW_SCROLL_BAR_COLS (w)); |
| 3014 | int margin_cols = (WINDOW_LEFT_MARGIN_COLS (w) |
| 3015 | + WINDOW_RIGHT_MARGIN_COLS (w)); |
| 3016 | |
| 3017 | if (box_cols - margin_cols >= MIN_SAFE_WINDOW_WIDTH) |
| 3018 | return 1; |
| 3019 | |
| 3020 | if (margin_cols < 0 || box_cols < MIN_SAFE_WINDOW_WIDTH) |
| 3021 | return 0; |
| 3022 | |
| 3023 | /* Window's text area is too narrow, but reducing the window |
| 3024 | margins will fix that. */ |
| 3025 | margin_cols = box_cols - MIN_SAFE_WINDOW_WIDTH; |
| 3026 | if (WINDOW_RIGHT_MARGIN_COLS (w) > 0) |
| 3027 | { |
| 3028 | if (WINDOW_LEFT_MARGIN_COLS (w) > 0) |
| 3029 | w->left_margin_cols = w->right_margin_cols = margin_cols / 2; |
| 3030 | else |
| 3031 | w->right_margin_cols = margin_cols; |
| 3032 | } |
| 3033 | else |
| 3034 | w->left_margin_cols = margin_cols; |
| 3035 | return 1; |
| 3036 | } |
| 3037 | \f |
| 3038 | /* The following three routines are needed for running a window's |
| 3039 | configuration change hook. */ |
| 3040 | static void |
| 3041 | run_funs (Lisp_Object funs) |
| 3042 | { |
| 3043 | for (; CONSP (funs); funs = XCDR (funs)) |
| 3044 | if (!EQ (XCAR (funs), Qt)) |
| 3045 | call0 (XCAR (funs)); |
| 3046 | } |
| 3047 | |
| 3048 | static void |
| 3049 | select_window_norecord (Lisp_Object window) |
| 3050 | { |
| 3051 | if (WINDOW_LIVE_P (window)) |
| 3052 | Fselect_window (window, Qt); |
| 3053 | } |
| 3054 | |
| 3055 | static void |
| 3056 | select_frame_norecord (Lisp_Object frame) |
| 3057 | { |
| 3058 | if (FRAME_LIVE_P (XFRAME (frame))) |
| 3059 | Fselect_frame (frame, Qt); |
| 3060 | } |
| 3061 | |
| 3062 | void |
| 3063 | run_window_configuration_change_hook (struct frame *f) |
| 3064 | { |
| 3065 | ptrdiff_t count = SPECPDL_INDEX (); |
| 3066 | Lisp_Object frame, global_wcch |
| 3067 | = Fdefault_value (Qwindow_configuration_change_hook); |
| 3068 | XSETFRAME (frame, f); |
| 3069 | |
| 3070 | if (NILP (Vrun_hooks) || !NILP (inhibit_lisp_code)) |
| 3071 | return; |
| 3072 | |
| 3073 | /* Use the right buffer. Matters when running the local hooks. */ |
| 3074 | if (current_buffer != XBUFFER (Fwindow_buffer (Qnil))) |
| 3075 | { |
| 3076 | record_unwind_current_buffer (); |
| 3077 | Fset_buffer (Fwindow_buffer (Qnil)); |
| 3078 | } |
| 3079 | |
| 3080 | if (SELECTED_FRAME () != f) |
| 3081 | { |
| 3082 | record_unwind_protect (select_frame_norecord, selected_frame); |
| 3083 | select_frame_norecord (frame); |
| 3084 | } |
| 3085 | |
| 3086 | /* Look for buffer-local values. */ |
| 3087 | { |
| 3088 | Lisp_Object windows = Fwindow_list (frame, Qlambda, Qnil); |
| 3089 | for (; CONSP (windows); windows = XCDR (windows)) |
| 3090 | { |
| 3091 | Lisp_Object window = XCAR (windows); |
| 3092 | Lisp_Object buffer = Fwindow_buffer (window); |
| 3093 | if (!NILP (Flocal_variable_p (Qwindow_configuration_change_hook, |
| 3094 | buffer))) |
| 3095 | { |
| 3096 | ptrdiff_t inner_count = SPECPDL_INDEX (); |
| 3097 | record_unwind_protect (select_window_norecord, selected_window); |
| 3098 | select_window_norecord (window); |
| 3099 | run_funs (Fbuffer_local_value (Qwindow_configuration_change_hook, |
| 3100 | buffer)); |
| 3101 | unbind_to (inner_count, Qnil); |
| 3102 | } |
| 3103 | } |
| 3104 | } |
| 3105 | |
| 3106 | run_funs (global_wcch); |
| 3107 | unbind_to (count, Qnil); |
| 3108 | } |
| 3109 | |
| 3110 | DEFUN ("run-window-configuration-change-hook", Frun_window_configuration_change_hook, |
| 3111 | Srun_window_configuration_change_hook, 0, 1, 0, |
| 3112 | doc: /* Run `window-configuration-change-hook' for FRAME. |
| 3113 | If FRAME is omitted or nil, it defaults to the selected frame. */) |
| 3114 | (Lisp_Object frame) |
| 3115 | { |
| 3116 | run_window_configuration_change_hook (decode_live_frame (frame)); |
| 3117 | return Qnil; |
| 3118 | } |
| 3119 | |
| 3120 | /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero |
| 3121 | means it's allowed to run hooks. See make_frame for a case where |
| 3122 | it's not allowed. KEEP_MARGINS_P non-zero means that the current |
| 3123 | margins, fringes, and scroll-bar settings of the window are not |
| 3124 | reset from the buffer's local settings. */ |
| 3125 | |
| 3126 | void |
| 3127 | set_window_buffer (Lisp_Object window, Lisp_Object buffer, |
| 3128 | bool run_hooks_p, bool keep_margins_p) |
| 3129 | { |
| 3130 | struct window *w = XWINDOW (window); |
| 3131 | struct buffer *b = XBUFFER (buffer); |
| 3132 | ptrdiff_t count = SPECPDL_INDEX (); |
| 3133 | int samebuf = EQ (buffer, w->contents); |
| 3134 | |
| 3135 | wset_buffer (w, buffer); |
| 3136 | |
| 3137 | if (EQ (window, selected_window)) |
| 3138 | bset_last_selected_window (b, window); |
| 3139 | |
| 3140 | /* Let redisplay errors through. */ |
| 3141 | b->display_error_modiff = 0; |
| 3142 | |
| 3143 | /* Update time stamps of buffer display. */ |
| 3144 | if (INTEGERP (BVAR (b, display_count))) |
| 3145 | bset_display_count (b, make_number (XINT (BVAR (b, display_count)) + 1)); |
| 3146 | bset_display_time (b, Fcurrent_time ()); |
| 3147 | |
| 3148 | w->window_end_pos = 0; |
| 3149 | w->window_end_vpos = 0; |
| 3150 | w->last_cursor_vpos = 0; |
| 3151 | |
| 3152 | if (!(keep_margins_p && samebuf)) |
| 3153 | { /* If we're not actually changing the buffer, don't reset hscroll and |
| 3154 | vscroll. This case happens for example when called from |
| 3155 | change_frame_size_1, where we use a dummy call to |
| 3156 | Fset_window_buffer on the frame's selected window (and no other) |
| 3157 | just in order to run window-configuration-change-hook. |
| 3158 | Resetting hscroll and vscroll here is problematic for things like |
| 3159 | image-mode and doc-view-mode since it resets the image's position |
| 3160 | whenever we resize the frame. */ |
| 3161 | w->hscroll = w->min_hscroll = 0; |
| 3162 | w->vscroll = 0; |
| 3163 | set_marker_both (w->pointm, buffer, BUF_PT (b), BUF_PT_BYTE (b)); |
| 3164 | set_marker_restricted (w->start, |
| 3165 | make_number (b->last_window_start), |
| 3166 | buffer); |
| 3167 | w->start_at_line_beg = 0; |
| 3168 | w->force_start = 0; |
| 3169 | } |
| 3170 | /* Maybe we could move this into the `if' but it's not obviously safe and |
| 3171 | I doubt it's worth the trouble. */ |
| 3172 | windows_or_buffers_changed++; |
| 3173 | |
| 3174 | /* We must select BUFFER for running the window-scroll-functions. */ |
| 3175 | /* We can't check ! NILP (Vwindow_scroll_functions) here |
| 3176 | because that might itself be a local variable. */ |
| 3177 | if (window_initialized) |
| 3178 | { |
| 3179 | record_unwind_current_buffer (); |
| 3180 | Fset_buffer (buffer); |
| 3181 | } |
| 3182 | |
| 3183 | XMARKER (w->pointm)->insertion_type = !NILP (Vwindow_point_insertion_type); |
| 3184 | |
| 3185 | if (!keep_margins_p) |
| 3186 | { |
| 3187 | /* Set left and right marginal area width etc. from buffer. */ |
| 3188 | set_window_fringes (w, BVAR (b, left_fringe_width), |
| 3189 | BVAR (b, right_fringe_width), |
| 3190 | BVAR (b, fringes_outside_margins)); |
| 3191 | set_window_scroll_bars (w, BVAR (b, scroll_bar_width), |
| 3192 | BVAR (b, vertical_scroll_bar_type), Qnil); |
| 3193 | set_window_margins (w, BVAR (b, left_margin_cols), |
| 3194 | BVAR (b, right_margin_cols)); |
| 3195 | apply_window_adjustment (w); |
| 3196 | } |
| 3197 | |
| 3198 | if (run_hooks_p) |
| 3199 | { |
| 3200 | if (! NILP (Vwindow_scroll_functions)) |
| 3201 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
| 3202 | Fmarker_position (w->start)); |
| 3203 | run_window_configuration_change_hook (XFRAME (WINDOW_FRAME (w))); |
| 3204 | } |
| 3205 | |
| 3206 | unbind_to (count, Qnil); |
| 3207 | } |
| 3208 | |
| 3209 | DEFUN ("set-window-buffer", Fset_window_buffer, Sset_window_buffer, 2, 3, 0, |
| 3210 | doc: /* Make WINDOW display BUFFER-OR-NAME as its contents. |
| 3211 | WINDOW must be a live window and defaults to the selected one. |
| 3212 | BUFFER-OR-NAME must be a buffer or the name of an existing buffer. |
| 3213 | |
| 3214 | Optional third argument KEEP-MARGINS non-nil means that WINDOW's current |
| 3215 | display margins, fringe widths, and scroll bar settings are preserved; |
| 3216 | the default is to reset these from the local settings for BUFFER-OR-NAME |
| 3217 | or the frame defaults. Return nil. |
| 3218 | |
| 3219 | This function throws an error when WINDOW is strongly dedicated to its |
| 3220 | buffer (that is `window-dedicated-p' returns t for WINDOW) and does not |
| 3221 | already display BUFFER-OR-NAME. |
| 3222 | |
| 3223 | This function runs `window-scroll-functions' before running |
| 3224 | `window-configuration-change-hook'. */) |
| 3225 | (register Lisp_Object window, Lisp_Object buffer_or_name, Lisp_Object keep_margins) |
| 3226 | { |
| 3227 | register Lisp_Object tem, buffer; |
| 3228 | register struct window *w = decode_live_window (window); |
| 3229 | |
| 3230 | XSETWINDOW (window, w); |
| 3231 | buffer = Fget_buffer (buffer_or_name); |
| 3232 | CHECK_BUFFER (buffer); |
| 3233 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
| 3234 | error ("Attempt to display deleted buffer"); |
| 3235 | |
| 3236 | tem = w->contents; |
| 3237 | if (NILP (tem)) |
| 3238 | error ("Window is deleted"); |
| 3239 | else |
| 3240 | { |
| 3241 | if (!EQ (tem, buffer)) |
| 3242 | { |
| 3243 | if (EQ (w->dedicated, Qt)) |
| 3244 | /* WINDOW is strongly dedicated to its buffer, signal an |
| 3245 | error. */ |
| 3246 | error ("Window is dedicated to `%s'", SDATA (BVAR (XBUFFER (tem), name))); |
| 3247 | else |
| 3248 | /* WINDOW is weakly dedicated to its buffer, reset |
| 3249 | dedication. */ |
| 3250 | wset_dedicated (w, Qnil); |
| 3251 | |
| 3252 | call1 (Qrecord_window_buffer, window); |
| 3253 | } |
| 3254 | |
| 3255 | unshow_buffer (w); |
| 3256 | } |
| 3257 | |
| 3258 | set_window_buffer (window, buffer, 1, !NILP (keep_margins)); |
| 3259 | |
| 3260 | return Qnil; |
| 3261 | } |
| 3262 | \f |
| 3263 | static Lisp_Object |
| 3264 | display_buffer (Lisp_Object buffer, Lisp_Object not_this_window_p, Lisp_Object override_frame) |
| 3265 | { |
| 3266 | return call3 (Qdisplay_buffer, buffer, not_this_window_p, override_frame); |
| 3267 | } |
| 3268 | |
| 3269 | DEFUN ("force-window-update", Fforce_window_update, Sforce_window_update, |
| 3270 | 0, 1, 0, |
| 3271 | doc: /* Force all windows to be updated on next redisplay. |
| 3272 | If optional arg OBJECT is a window, force redisplay of that window only. |
| 3273 | If OBJECT is a buffer or buffer name, force redisplay of all windows |
| 3274 | displaying that buffer. */) |
| 3275 | (Lisp_Object object) |
| 3276 | { |
| 3277 | if (NILP (object)) |
| 3278 | { |
| 3279 | windows_or_buffers_changed++; |
| 3280 | update_mode_lines++; |
| 3281 | return Qt; |
| 3282 | } |
| 3283 | |
| 3284 | if (WINDOWP (object)) |
| 3285 | { |
| 3286 | struct window *w = XWINDOW (object); |
| 3287 | mark_window_display_accurate (object, 0); |
| 3288 | w->update_mode_line = 1; |
| 3289 | if (BUFFERP (w->contents)) |
| 3290 | XBUFFER (w->contents)->prevent_redisplay_optimizations_p = 1; |
| 3291 | ++update_mode_lines; |
| 3292 | return Qt; |
| 3293 | } |
| 3294 | |
| 3295 | if (STRINGP (object)) |
| 3296 | object = Fget_buffer (object); |
| 3297 | if (BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object)) |
| 3298 | && buffer_window_count (XBUFFER (object))) |
| 3299 | { |
| 3300 | /* If buffer is live and shown in at least one window, find |
| 3301 | all windows showing this buffer and force update of them. */ |
| 3302 | object = window_loop (REDISPLAY_BUFFER_WINDOWS, object, 0, Qvisible); |
| 3303 | return NILP (object) ? Qnil : Qt; |
| 3304 | } |
| 3305 | |
| 3306 | /* If nothing suitable was found, just return. |
| 3307 | We could signal an error, but this feature will typically be used |
| 3308 | asynchronously in timers or process sentinels, so we don't. */ |
| 3309 | return Qnil; |
| 3310 | } |
| 3311 | |
| 3312 | /* Obsolete since 24.3. */ |
| 3313 | void |
| 3314 | temp_output_buffer_show (register Lisp_Object buf) |
| 3315 | { |
| 3316 | register struct buffer *old = current_buffer; |
| 3317 | register Lisp_Object window; |
| 3318 | register struct window *w; |
| 3319 | |
| 3320 | bset_directory (XBUFFER (buf), BVAR (current_buffer, directory)); |
| 3321 | |
| 3322 | Fset_buffer (buf); |
| 3323 | BUF_SAVE_MODIFF (XBUFFER (buf)) = MODIFF; |
| 3324 | BEGV = BEG; |
| 3325 | ZV = Z; |
| 3326 | SET_PT (BEG); |
| 3327 | set_buffer_internal (old); |
| 3328 | |
| 3329 | if (!NILP (Vtemp_buffer_show_function)) |
| 3330 | call1 (Vtemp_buffer_show_function, buf); |
| 3331 | else if (WINDOW_LIVE_P (window = display_buffer (buf, Qnil, Qnil))) |
| 3332 | { |
| 3333 | if (!EQ (XWINDOW (window)->frame, selected_frame)) |
| 3334 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window))); |
| 3335 | Vminibuf_scroll_window = window; |
| 3336 | w = XWINDOW (window); |
| 3337 | w->hscroll = 0; |
| 3338 | w->min_hscroll = 0; |
| 3339 | set_marker_restricted_both (w->start, buf, BEG, BEG); |
| 3340 | set_marker_restricted_both (w->pointm, buf, BEG, BEG); |
| 3341 | |
| 3342 | /* Run temp-buffer-show-hook, with the chosen window selected |
| 3343 | and its buffer current. */ |
| 3344 | { |
| 3345 | ptrdiff_t count = SPECPDL_INDEX (); |
| 3346 | Lisp_Object prev_window, prev_buffer; |
| 3347 | prev_window = selected_window; |
| 3348 | XSETBUFFER (prev_buffer, old); |
| 3349 | |
| 3350 | /* Select the window that was chosen, for running the hook. |
| 3351 | Note: Both Fselect_window and select_window_norecord may |
| 3352 | set-buffer to the buffer displayed in the window, |
| 3353 | so we need to save the current buffer. --stef */ |
| 3354 | record_unwind_protect (restore_buffer, prev_buffer); |
| 3355 | record_unwind_protect (select_window_norecord, prev_window); |
| 3356 | Fselect_window (window, Qt); |
| 3357 | Fset_buffer (w->contents); |
| 3358 | Frun_hooks (1, &Qtemp_buffer_show_hook); |
| 3359 | unbind_to (count, Qnil); |
| 3360 | } |
| 3361 | } |
| 3362 | } |
| 3363 | \f |
| 3364 | /* Make new window, have it replace WINDOW in window-tree, and make |
| 3365 | WINDOW its only vertical child (HORFLAG 1 means make WINDOW its only |
| 3366 | horizontal child). */ |
| 3367 | static void |
| 3368 | make_parent_window (Lisp_Object window, bool horflag) |
| 3369 | { |
| 3370 | Lisp_Object parent; |
| 3371 | register struct window *o, *p; |
| 3372 | |
| 3373 | o = XWINDOW (window); |
| 3374 | p = allocate_window (); |
| 3375 | memcpy ((char *) p + sizeof (struct vectorlike_header), |
| 3376 | (char *) o + sizeof (struct vectorlike_header), |
| 3377 | word_size * VECSIZE (struct window)); |
| 3378 | /* P's buffer slot may change from nil to a buffer... */ |
| 3379 | adjust_window_count (p, 1); |
| 3380 | XSETWINDOW (parent, p); |
| 3381 | |
| 3382 | replace_window (window, parent, 1); |
| 3383 | |
| 3384 | wset_next (o, Qnil); |
| 3385 | wset_prev (o, Qnil); |
| 3386 | wset_parent (o, parent); |
| 3387 | /* ...but now P becomes an internal window. */ |
| 3388 | wset_start (p, Qnil); |
| 3389 | wset_pointm (p, Qnil); |
| 3390 | wset_buffer (p, Qnil); |
| 3391 | wset_combination (p, horflag, window); |
| 3392 | wset_combination_limit (p, Qnil); |
| 3393 | wset_window_parameters (p, Qnil); |
| 3394 | } |
| 3395 | |
| 3396 | /* Make new window from scratch. */ |
| 3397 | Lisp_Object |
| 3398 | make_window (void) |
| 3399 | { |
| 3400 | Lisp_Object window; |
| 3401 | register struct window *w; |
| 3402 | |
| 3403 | w = allocate_window (); |
| 3404 | /* Initialize Lisp data. Note that allocate_window initializes all |
| 3405 | Lisp data to nil, so do it only for slots which should not be nil. */ |
| 3406 | wset_normal_lines (w, make_float (1.0)); |
| 3407 | wset_normal_cols (w, make_float (1.0)); |
| 3408 | wset_new_total (w, make_number (0)); |
| 3409 | wset_new_normal (w, make_number (0)); |
| 3410 | wset_start (w, Fmake_marker ()); |
| 3411 | wset_pointm (w, Fmake_marker ()); |
| 3412 | wset_vertical_scroll_bar_type (w, Qt); |
| 3413 | /* These Lisp fields are marked specially so they're not set to nil by |
| 3414 | allocate_window. */ |
| 3415 | wset_prev_buffers (w, Qnil); |
| 3416 | wset_next_buffers (w, Qnil); |
| 3417 | |
| 3418 | /* Initialize non-Lisp data. Note that allocate_window zeroes out all |
| 3419 | non-Lisp data, so do it only for slots which should not be zero. */ |
| 3420 | w->nrows_scale_factor = w->ncols_scale_factor = 1; |
| 3421 | w->left_fringe_width = w->right_fringe_width = -1; |
| 3422 | w->mode_line_height = w->header_line_height = -1; |
| 3423 | w->phys_cursor_type = -1; |
| 3424 | w->phys_cursor_width = -1; |
| 3425 | w->scroll_bar_width = -1; |
| 3426 | w->column_number_displayed = -1; |
| 3427 | |
| 3428 | /* Reset window_list. */ |
| 3429 | Vwindow_list = Qnil; |
| 3430 | /* Return window. */ |
| 3431 | XSETWINDOW (window, w); |
| 3432 | return window; |
| 3433 | } |
| 3434 | \f |
| 3435 | DEFUN ("set-window-new-total", Fset_window_new_total, Sset_window_new_total, 2, 3, 0, |
| 3436 | doc: /* Set new total size of WINDOW to SIZE. |
| 3437 | WINDOW must be a valid window and defaults to the selected one. |
| 3438 | Return SIZE. |
| 3439 | |
| 3440 | Optional argument ADD non-nil means add SIZE to the new total size of |
| 3441 | WINDOW and return the sum. |
| 3442 | |
| 3443 | Note: This function does not operate on any child windows of WINDOW. */) |
| 3444 | (Lisp_Object window, Lisp_Object size, Lisp_Object add) |
| 3445 | { |
| 3446 | struct window *w = decode_valid_window (window); |
| 3447 | |
| 3448 | CHECK_NUMBER (size); |
| 3449 | if (NILP (add)) |
| 3450 | wset_new_total (w, size); |
| 3451 | else |
| 3452 | wset_new_total (w, make_number (XINT (w->new_total) + XINT (size))); |
| 3453 | |
| 3454 | return w->new_total; |
| 3455 | } |
| 3456 | |
| 3457 | DEFUN ("set-window-new-normal", Fset_window_new_normal, Sset_window_new_normal, 1, 2, 0, |
| 3458 | doc: /* Set new normal size of WINDOW to SIZE. |
| 3459 | WINDOW must be a valid window and defaults to the selected one. |
| 3460 | Return SIZE. |
| 3461 | |
| 3462 | Note: This function does not operate on any child windows of WINDOW. */) |
| 3463 | (Lisp_Object window, Lisp_Object size) |
| 3464 | { |
| 3465 | wset_new_normal (decode_valid_window (window), size); |
| 3466 | return size; |
| 3467 | } |
| 3468 | |
| 3469 | /* Return 1 if setting w->total_lines (w->total_cols if HORFLAG is |
| 3470 | non-zero) to w->new_total would result in correct heights (widths) |
| 3471 | for window W and recursively all child windows of W. |
| 3472 | |
| 3473 | Note: This function does not check any of `window-fixed-size-p', |
| 3474 | `window-min-height' or `window-min-width'. It does check that window |
| 3475 | sizes do not drop below one line (two columns). */ |
| 3476 | static int |
| 3477 | window_resize_check (struct window *w, bool horflag) |
| 3478 | { |
| 3479 | struct window *c; |
| 3480 | |
| 3481 | if (WINDOW_VERTICAL_COMBINATION_P (w)) |
| 3482 | /* W is a vertical combination. */ |
| 3483 | { |
| 3484 | c = XWINDOW (w->contents); |
| 3485 | if (horflag) |
| 3486 | /* All child windows of W must have the same width as W. */ |
| 3487 | { |
| 3488 | while (c) |
| 3489 | { |
| 3490 | if ((XINT (c->new_total) != XINT (w->new_total)) |
| 3491 | || !window_resize_check (c, horflag)) |
| 3492 | return 0; |
| 3493 | c = NILP (c->next) ? 0 : XWINDOW (c->next); |
| 3494 | } |
| 3495 | return 1; |
| 3496 | } |
| 3497 | else |
| 3498 | /* The sum of the heights of the child windows of W must equal |
| 3499 | W's height. */ |
| 3500 | { |
| 3501 | int sum_of_sizes = 0; |
| 3502 | while (c) |
| 3503 | { |
| 3504 | if (!window_resize_check (c, horflag)) |
| 3505 | return 0; |
| 3506 | sum_of_sizes = sum_of_sizes + XINT (c->new_total); |
| 3507 | c = NILP (c->next) ? 0 : XWINDOW (c->next); |
| 3508 | } |
| 3509 | return (sum_of_sizes == XINT (w->new_total)); |
| 3510 | } |
| 3511 | } |
| 3512 | else if (WINDOW_HORIZONTAL_COMBINATION_P (w)) |
| 3513 | /* W is a horizontal combination. */ |
| 3514 | { |
| 3515 | c = XWINDOW (w->contents); |
| 3516 | if (horflag) |
| 3517 | /* The sum of the widths of the child windows of W must equal W's |
| 3518 | width. */ |
| 3519 | { |
| 3520 | int sum_of_sizes = 0; |
| 3521 | while (c) |
| 3522 | { |
| 3523 | if (!window_resize_check (c, horflag)) |
| 3524 | return 0; |
| 3525 | sum_of_sizes = sum_of_sizes + XINT (c->new_total); |
| 3526 | c = NILP (c->next) ? 0 : XWINDOW (c->next); |
| 3527 | } |
| 3528 | return (sum_of_sizes == XINT (w->new_total)); |
| 3529 | } |
| 3530 | else |
| 3531 | /* All child windows of W must have the same height as W. */ |
| 3532 | { |
| 3533 | while (c) |
| 3534 | { |
| 3535 | if ((XINT (c->new_total) != XINT (w->new_total)) |
| 3536 | || !window_resize_check (c, horflag)) |
| 3537 | return 0; |
| 3538 | c = NILP (c->next) ? 0 : XWINDOW (c->next); |
| 3539 | } |
| 3540 | return 1; |
| 3541 | } |
| 3542 | } |
| 3543 | else |
| 3544 | /* A leaf window. Make sure it's not too small. The following |
| 3545 | hardcodes the values of `window-safe-min-width' (2) and |
| 3546 | `window-safe-min-height' (1) which are defined in window.el. */ |
| 3547 | return XINT (w->new_total) >= (horflag ? 2 : 1); |
| 3548 | } |
| 3549 | |
| 3550 | /* Set w->total_lines (w->total_cols if HORIZONTAL is non-zero) to |
| 3551 | w->new_total for window W and recursively all child windows of W. |
| 3552 | Also calculate and assign the new vertical (horizontal) start |
| 3553 | positions of each of these windows. |
| 3554 | |
| 3555 | This function does not perform any error checks. Make sure you have |
| 3556 | run window_resize_check on W before applying this function. */ |
| 3557 | static void |
| 3558 | window_resize_apply (struct window *w, bool horflag) |
| 3559 | { |
| 3560 | struct window *c; |
| 3561 | int pos; |
| 3562 | |
| 3563 | /* Note: Assigning new_normal requires that the new total size of the |
| 3564 | parent window has been set *before*. */ |
| 3565 | if (horflag) |
| 3566 | { |
| 3567 | w->total_cols = XFASTINT (w->new_total); |
| 3568 | if (NUMBERP (w->new_normal)) |
| 3569 | wset_normal_cols (w, w->new_normal); |
| 3570 | |
| 3571 | pos = w->left_col; |
| 3572 | } |
| 3573 | else |
| 3574 | { |
| 3575 | w->total_lines = XFASTINT (w->new_total); |
| 3576 | if (NUMBERP (w->new_normal)) |
| 3577 | wset_normal_lines (w, w->new_normal); |
| 3578 | |
| 3579 | pos = w->top_line; |
| 3580 | } |
| 3581 | |
| 3582 | if (WINDOW_VERTICAL_COMBINATION_P (w)) |
| 3583 | /* W is a vertical combination. */ |
| 3584 | { |
| 3585 | c = XWINDOW (w->contents); |
| 3586 | while (c) |
| 3587 | { |
| 3588 | if (horflag) |
| 3589 | c->left_col = pos; |
| 3590 | else |
| 3591 | c->top_line = pos; |
| 3592 | window_resize_apply (c, horflag); |
| 3593 | if (!horflag) |
| 3594 | pos = pos + c->total_lines; |
| 3595 | c = NILP (c->next) ? 0 : XWINDOW (c->next); |
| 3596 | } |
| 3597 | } |
| 3598 | else if (WINDOW_HORIZONTAL_COMBINATION_P (w)) |
| 3599 | /* W is a horizontal combination. */ |
| 3600 | { |
| 3601 | c = XWINDOW (w->contents); |
| 3602 | while (c) |
| 3603 | { |
| 3604 | if (horflag) |
| 3605 | c->left_col = pos; |
| 3606 | else |
| 3607 | c->top_line = pos; |
| 3608 | window_resize_apply (c, horflag); |
| 3609 | if (horflag) |
| 3610 | pos = pos + c->total_cols; |
| 3611 | c = NILP (c->next) ? 0 : XWINDOW (c->next); |
| 3612 | } |
| 3613 | } |
| 3614 | } |
| 3615 | |
| 3616 | |
| 3617 | DEFUN ("window-resize-apply", Fwindow_resize_apply, Swindow_resize_apply, 0, 2, 0, |
| 3618 | doc: /* Apply requested size values for window-tree of FRAME. |
| 3619 | If FRAME is omitted or nil, it defaults to the selected frame. |
| 3620 | |
| 3621 | Optional argument HORIZONTAL omitted or nil means apply requested |
| 3622 | height values. HORIZONTAL non-nil means apply requested width values. |
| 3623 | |
| 3624 | This function checks whether the requested values sum up to a valid |
| 3625 | window layout, recursively assigns the new sizes of all child windows |
| 3626 | and calculates and assigns the new start positions of these windows. |
| 3627 | |
| 3628 | Note: This function does not check any of `window-fixed-size-p', |
| 3629 | `window-min-height' or `window-min-width'. All these checks have to |
| 3630 | be applied on the Elisp level. */) |
| 3631 | (Lisp_Object frame, Lisp_Object horizontal) |
| 3632 | { |
| 3633 | struct frame *f = decode_live_frame (frame); |
| 3634 | struct window *r = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 3635 | bool horflag = !NILP (horizontal); |
| 3636 | |
| 3637 | if (!window_resize_check (r, horflag) |
| 3638 | || (XINT (r->new_total) |
| 3639 | != (horflag ? r->total_cols : r->total_lines))) |
| 3640 | return Qnil; |
| 3641 | |
| 3642 | block_input (); |
| 3643 | window_resize_apply (r, horflag); |
| 3644 | |
| 3645 | windows_or_buffers_changed++; |
| 3646 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 3647 | |
| 3648 | adjust_frame_glyphs (f); |
| 3649 | unblock_input (); |
| 3650 | |
| 3651 | run_window_configuration_change_hook (f); |
| 3652 | |
| 3653 | return Qt; |
| 3654 | } |
| 3655 | |
| 3656 | |
| 3657 | /* Resize frame F's windows when number of lines of F is set to SIZE. |
| 3658 | HORFLAG 1 means resize windows when number of columns of F is set to |
| 3659 | SIZE. |
| 3660 | |
| 3661 | This function can delete all windows but the selected one in order to |
| 3662 | satisfy the request. The result will be meaningful if and only if |
| 3663 | F's windows have meaningful sizes when you call this. */ |
| 3664 | void |
| 3665 | resize_frame_windows (struct frame *f, int size, bool horflag) |
| 3666 | { |
| 3667 | Lisp_Object root = f->root_window; |
| 3668 | struct window *r = XWINDOW (root); |
| 3669 | Lisp_Object mini = f->minibuffer_window; |
| 3670 | struct window *m; |
| 3671 | /* new_size is the new size of the frame's root window. */ |
| 3672 | int new_size = (horflag |
| 3673 | ? size |
| 3674 | : (size |
| 3675 | - FRAME_TOP_MARGIN (f) |
| 3676 | - ((FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
| 3677 | ? 1 : 0))); |
| 3678 | |
| 3679 | r->top_line = FRAME_TOP_MARGIN (f); |
| 3680 | if (WINDOW_LEAF_P (r)) |
| 3681 | /* For a leaf root window just set the size. */ |
| 3682 | if (horflag) |
| 3683 | r->total_cols = new_size; |
| 3684 | else |
| 3685 | r->total_lines = new_size; |
| 3686 | else |
| 3687 | { |
| 3688 | /* old_size is the old size of the frame's root window. */ |
| 3689 | int old_size = horflag ? r->total_cols : r->total_lines; |
| 3690 | Lisp_Object delta; |
| 3691 | |
| 3692 | XSETINT (delta, new_size - old_size); |
| 3693 | /* Try a "normal" resize first. */ |
| 3694 | resize_root_window (root, delta, horflag ? Qt : Qnil, Qnil); |
| 3695 | if (window_resize_check (r, horflag) |
| 3696 | && new_size == XINT (r->new_total)) |
| 3697 | window_resize_apply (r, horflag); |
| 3698 | else |
| 3699 | { |
| 3700 | /* Try with "reasonable" minimum sizes next. */ |
| 3701 | resize_root_window (root, delta, horflag ? Qt : Qnil, Qt); |
| 3702 | if (window_resize_check (r, horflag) |
| 3703 | && new_size == XINT (r->new_total)) |
| 3704 | window_resize_apply (r, horflag); |
| 3705 | else |
| 3706 | { |
| 3707 | /* Finally, try with "safe" minimum sizes. */ |
| 3708 | resize_root_window (root, delta, horflag ? Qt : Qnil, Qsafe); |
| 3709 | if (window_resize_check (r, horflag) |
| 3710 | && new_size == XINT (r->new_total)) |
| 3711 | window_resize_apply (r, horflag); |
| 3712 | else |
| 3713 | { |
| 3714 | /* We lost. Delete all windows but the frame's |
| 3715 | selected one. */ |
| 3716 | root = f->selected_window; |
| 3717 | Fdelete_other_windows_internal (root, Qnil); |
| 3718 | if (horflag) |
| 3719 | XWINDOW (root)->total_cols = new_size; |
| 3720 | else |
| 3721 | XWINDOW (root)->total_lines = new_size; |
| 3722 | } |
| 3723 | } |
| 3724 | } |
| 3725 | } |
| 3726 | |
| 3727 | if (FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f)) |
| 3728 | { |
| 3729 | m = XWINDOW (mini); |
| 3730 | if (horflag) |
| 3731 | m->total_cols = size; |
| 3732 | else |
| 3733 | { |
| 3734 | /* Are we sure we always want 1 line here? */ |
| 3735 | m->total_lines = 1; |
| 3736 | m->top_line = r->top_line + r->total_lines; |
| 3737 | } |
| 3738 | } |
| 3739 | |
| 3740 | windows_or_buffers_changed++; |
| 3741 | } |
| 3742 | |
| 3743 | |
| 3744 | DEFUN ("split-window-internal", Fsplit_window_internal, Ssplit_window_internal, 4, 4, 0, |
| 3745 | doc: /* Split window OLD. |
| 3746 | Second argument TOTAL-SIZE specifies the number of lines or columns of the |
| 3747 | new window. In any case TOTAL-SIZE must be a positive integer. |
| 3748 | |
| 3749 | Third argument SIDE nil (or `below') specifies that the new window shall |
| 3750 | be located below WINDOW. SIDE `above' means the new window shall be |
| 3751 | located above WINDOW. In both cases TOTAL-SIZE specifies the number of |
| 3752 | lines of the new window including space reserved for the mode and/or |
| 3753 | header line. |
| 3754 | |
| 3755 | SIDE t (or `right') specifies that the new window shall be located on |
| 3756 | the right side of WINDOW. SIDE `left' means the new window shall be |
| 3757 | located on the left of WINDOW. In both cases TOTAL-SIZE specifies the |
| 3758 | number of columns of the new window including space reserved for fringes |
| 3759 | and the scrollbar or a divider column. |
| 3760 | |
| 3761 | Fourth argument NORMAL-SIZE specifies the normal size of the new window |
| 3762 | according to the SIDE argument. |
| 3763 | |
| 3764 | The new total and normal sizes of all involved windows must have been |
| 3765 | set correctly. See the code of `split-window' for how this is done. */) |
| 3766 | (Lisp_Object old, Lisp_Object total_size, Lisp_Object side, Lisp_Object normal_size) |
| 3767 | { |
| 3768 | /* OLD (*o) is the window we have to split. (*p) is either OLD's |
| 3769 | parent window or an internal window we have to install as OLD's new |
| 3770 | parent. REFERENCE (*r) must denote a live window, or is set to OLD |
| 3771 | provided OLD is a leaf window, or to the frame's selected window. |
| 3772 | NEW (*n) is the new window created with some parameters taken from |
| 3773 | REFERENCE (*r). */ |
| 3774 | register Lisp_Object new, frame, reference; |
| 3775 | register struct window *o, *p, *n, *r; |
| 3776 | struct frame *f; |
| 3777 | bool horflag |
| 3778 | /* HORFLAG is 1 when we split side-by-side, 0 otherwise. */ |
| 3779 | = EQ (side, Qt) || EQ (side, Qleft) || EQ (side, Qright); |
| 3780 | int combination_limit = 0; |
| 3781 | |
| 3782 | CHECK_WINDOW (old); |
| 3783 | o = XWINDOW (old); |
| 3784 | frame = WINDOW_FRAME (o); |
| 3785 | f = XFRAME (frame); |
| 3786 | |
| 3787 | CHECK_NUMBER (total_size); |
| 3788 | |
| 3789 | /* Set combination_limit to 1 if we have to make a new parent window. |
| 3790 | We do that if either `window-combination-limit' is t, or OLD has no |
| 3791 | parent, or OLD is ortho-combined. */ |
| 3792 | combination_limit = |
| 3793 | EQ (Vwindow_combination_limit, Qt) |
| 3794 | || NILP (o->parent) |
| 3795 | || (horflag |
| 3796 | ? WINDOW_VERTICAL_COMBINATION_P (XWINDOW (o->parent)) |
| 3797 | : WINDOW_HORIZONTAL_COMBINATION_P (XWINDOW (o->parent))); |
| 3798 | |
| 3799 | /* We need a live reference window to initialize some parameters. */ |
| 3800 | if (WINDOW_LIVE_P (old)) |
| 3801 | /* OLD is live, use it as reference window. */ |
| 3802 | reference = old; |
| 3803 | else |
| 3804 | /* Use the frame's selected window as reference window. */ |
| 3805 | reference = FRAME_SELECTED_WINDOW (f); |
| 3806 | r = XWINDOW (reference); |
| 3807 | |
| 3808 | /* The following bugs are caught by `split-window'. */ |
| 3809 | if (MINI_WINDOW_P (o)) |
| 3810 | error ("Attempt to split minibuffer window"); |
| 3811 | else if (XINT (total_size) < (horflag ? 2 : 1)) |
| 3812 | error ("Size of new window too small (after split)"); |
| 3813 | else if (!combination_limit && !NILP (Vwindow_combination_resize)) |
| 3814 | /* `window-combination-resize' non-nil means try to resize OLD's siblings |
| 3815 | proportionally. */ |
| 3816 | { |
| 3817 | p = XWINDOW (o->parent); |
| 3818 | /* Temporarily pretend we split the parent window. */ |
| 3819 | wset_new_total |
| 3820 | (p, make_number ((horflag ? p->total_cols : p->total_lines) |
| 3821 | - XINT (total_size))); |
| 3822 | if (!window_resize_check (p, horflag)) |
| 3823 | error ("Window sizes don't fit"); |
| 3824 | else |
| 3825 | /* Undo the temporary pretension. */ |
| 3826 | wset_new_total (p, make_number |
| 3827 | (horflag ? p->total_cols : p->total_lines)); |
| 3828 | } |
| 3829 | else |
| 3830 | { |
| 3831 | if (!window_resize_check (o, horflag)) |
| 3832 | error ("Resizing old window failed"); |
| 3833 | else if (XINT (total_size) + XINT (o->new_total) |
| 3834 | != (horflag ? o->total_cols : o->total_lines)) |
| 3835 | error ("Sum of sizes of old and new window don't fit"); |
| 3836 | } |
| 3837 | |
| 3838 | /* This is our point of no return. */ |
| 3839 | if (combination_limit) |
| 3840 | { |
| 3841 | /* Save the old value of o->normal_cols/lines. It gets corrupted |
| 3842 | by make_parent_window and we need it below for assigning it to |
| 3843 | p->new_normal. */ |
| 3844 | Lisp_Object new_normal |
| 3845 | = horflag ? o->normal_cols : o->normal_lines; |
| 3846 | |
| 3847 | make_parent_window (old, horflag); |
| 3848 | p = XWINDOW (o->parent); |
| 3849 | if (EQ (Vwindow_combination_limit, Qt)) |
| 3850 | /* Store t in the new parent's combination_limit slot to avoid |
| 3851 | that its children get merged into another window. */ |
| 3852 | wset_combination_limit (p, Qt); |
| 3853 | /* These get applied below. */ |
| 3854 | wset_new_total (p, make_number |
| 3855 | (horflag ? o->total_cols : o->total_lines)); |
| 3856 | wset_new_normal (p, new_normal); |
| 3857 | } |
| 3858 | else |
| 3859 | p = XWINDOW (o->parent); |
| 3860 | |
| 3861 | windows_or_buffers_changed++; |
| 3862 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 3863 | new = make_window (); |
| 3864 | n = XWINDOW (new); |
| 3865 | wset_frame (n, frame); |
| 3866 | wset_parent (n, o->parent); |
| 3867 | |
| 3868 | if (EQ (side, Qabove) || EQ (side, Qleft)) |
| 3869 | { |
| 3870 | wset_prev (n, o->prev); |
| 3871 | if (NILP (n->prev)) |
| 3872 | wset_combination (p, horflag, new); |
| 3873 | else |
| 3874 | wset_next (XWINDOW (n->prev), new); |
| 3875 | wset_next (n, old); |
| 3876 | wset_prev (o, new); |
| 3877 | } |
| 3878 | else |
| 3879 | { |
| 3880 | wset_next (n, o->next); |
| 3881 | if (!NILP (n->next)) |
| 3882 | wset_prev (XWINDOW (n->next), new); |
| 3883 | wset_prev (n, old); |
| 3884 | wset_next (o, new); |
| 3885 | } |
| 3886 | |
| 3887 | n->window_end_valid = 0; |
| 3888 | n->last_cursor_vpos = 0; |
| 3889 | |
| 3890 | /* Get special geometry settings from reference window. */ |
| 3891 | n->left_margin_cols = r->left_margin_cols; |
| 3892 | n->right_margin_cols = r->right_margin_cols; |
| 3893 | n->left_fringe_width = r->left_fringe_width; |
| 3894 | n->right_fringe_width = r->right_fringe_width; |
| 3895 | n->fringes_outside_margins = r->fringes_outside_margins; |
| 3896 | n->scroll_bar_width = r->scroll_bar_width; |
| 3897 | wset_vertical_scroll_bar_type (n, r->vertical_scroll_bar_type); |
| 3898 | |
| 3899 | /* Directly assign orthogonal coordinates and sizes. */ |
| 3900 | if (horflag) |
| 3901 | { |
| 3902 | n->top_line = o->top_line; |
| 3903 | n->total_lines = o->total_lines; |
| 3904 | } |
| 3905 | else |
| 3906 | { |
| 3907 | n->left_col = o->left_col; |
| 3908 | n->total_cols = o->total_cols; |
| 3909 | } |
| 3910 | |
| 3911 | /* Iso-coordinates and sizes are assigned by window_resize_apply, |
| 3912 | get them ready here. */ |
| 3913 | wset_new_total (n, total_size); |
| 3914 | wset_new_normal (n, normal_size); |
| 3915 | |
| 3916 | block_input (); |
| 3917 | window_resize_apply (p, horflag); |
| 3918 | adjust_frame_glyphs (f); |
| 3919 | /* Set buffer of NEW to buffer of reference window. Don't run |
| 3920 | any hooks. */ |
| 3921 | set_window_buffer (new, r->contents, 0, 1); |
| 3922 | unblock_input (); |
| 3923 | |
| 3924 | /* Maybe we should run the scroll functions in Elisp (which already |
| 3925 | runs the configuration change hook). */ |
| 3926 | if (! NILP (Vwindow_scroll_functions)) |
| 3927 | run_hook_with_args_2 (Qwindow_scroll_functions, new, |
| 3928 | Fmarker_position (n->start)); |
| 3929 | /* Return NEW. */ |
| 3930 | return new; |
| 3931 | } |
| 3932 | |
| 3933 | |
| 3934 | DEFUN ("delete-window-internal", Fdelete_window_internal, Sdelete_window_internal, 1, 1, 0, |
| 3935 | doc: /* Remove WINDOW from its frame. |
| 3936 | WINDOW defaults to the selected window. Return nil. |
| 3937 | Signal an error when WINDOW is the only window on its frame. */) |
| 3938 | (register Lisp_Object window) |
| 3939 | { |
| 3940 | register Lisp_Object parent, sibling, frame, root; |
| 3941 | struct window *w, *p, *s, *r; |
| 3942 | struct frame *f; |
| 3943 | bool horflag, before_sibling = 0; |
| 3944 | |
| 3945 | w = decode_any_window (window); |
| 3946 | XSETWINDOW (window, w); |
| 3947 | if (NILP (w->contents)) |
| 3948 | /* It's a no-op to delete an already deleted window. */ |
| 3949 | return Qnil; |
| 3950 | |
| 3951 | parent = w->parent; |
| 3952 | if (NILP (parent)) |
| 3953 | /* Never delete a minibuffer or frame root window. */ |
| 3954 | error ("Attempt to delete minibuffer or sole ordinary window"); |
| 3955 | else if (NILP (w->prev) && NILP (w->next)) |
| 3956 | /* Rather bow out here, this case should be handled on the Elisp |
| 3957 | level. */ |
| 3958 | error ("Attempt to delete sole window of parent"); |
| 3959 | |
| 3960 | p = XWINDOW (parent); |
| 3961 | horflag = WINDOW_HORIZONTAL_COMBINATION_P (p); |
| 3962 | |
| 3963 | frame = WINDOW_FRAME (w); |
| 3964 | f = XFRAME (frame); |
| 3965 | |
| 3966 | root = FRAME_ROOT_WINDOW (f); |
| 3967 | r = XWINDOW (root); |
| 3968 | |
| 3969 | /* Unlink WINDOW from window tree. */ |
| 3970 | if (NILP (w->prev)) |
| 3971 | /* Get SIBLING below (on the right of) WINDOW. */ |
| 3972 | { |
| 3973 | /* before_sibling 1 means WINDOW is the first child of its |
| 3974 | parent and thus before the sibling. */ |
| 3975 | before_sibling = 1; |
| 3976 | sibling = w->next; |
| 3977 | s = XWINDOW (sibling); |
| 3978 | wset_prev (s, Qnil); |
| 3979 | wset_combination (p, horflag, sibling); |
| 3980 | } |
| 3981 | else |
| 3982 | /* Get SIBLING above (on the left of) WINDOW. */ |
| 3983 | { |
| 3984 | sibling = w->prev; |
| 3985 | s = XWINDOW (sibling); |
| 3986 | wset_next (s, w->next); |
| 3987 | if (!NILP (s->next)) |
| 3988 | wset_prev (XWINDOW (s->next), sibling); |
| 3989 | } |
| 3990 | |
| 3991 | if (window_resize_check (r, horflag) |
| 3992 | && (XINT (r->new_total) |
| 3993 | == (horflag ? r->total_cols : r->total_lines))) |
| 3994 | /* We can delete WINDOW now. */ |
| 3995 | { |
| 3996 | |
| 3997 | /* Block input. */ |
| 3998 | block_input (); |
| 3999 | window_resize_apply (p, horflag); |
| 4000 | |
| 4001 | /* If this window is referred to by the dpyinfo's mouse |
| 4002 | highlight, invalidate that slot to be safe (Bug#9904). */ |
| 4003 | if (!FRAME_INITIAL_P (f)) |
| 4004 | { |
| 4005 | Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f); |
| 4006 | |
| 4007 | if (EQ (hlinfo->mouse_face_window, window)) |
| 4008 | hlinfo->mouse_face_window = Qnil; |
| 4009 | } |
| 4010 | |
| 4011 | windows_or_buffers_changed++; |
| 4012 | Vwindow_list = Qnil; |
| 4013 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 4014 | |
| 4015 | wset_next (w, Qnil); /* Don't delete w->next too. */ |
| 4016 | free_window_matrices (w); |
| 4017 | |
| 4018 | if (WINDOWP (w->contents)) |
| 4019 | { |
| 4020 | delete_all_child_windows (w->contents); |
| 4021 | wset_combination (w, 0, Qnil); |
| 4022 | } |
| 4023 | else |
| 4024 | { |
| 4025 | unshow_buffer (w); |
| 4026 | unchain_marker (XMARKER (w->pointm)); |
| 4027 | unchain_marker (XMARKER (w->start)); |
| 4028 | wset_buffer (w, Qnil); |
| 4029 | } |
| 4030 | |
| 4031 | if (NILP (s->prev) && NILP (s->next)) |
| 4032 | /* A matrjoshka where SIBLING has become the only child of |
| 4033 | PARENT. */ |
| 4034 | { |
| 4035 | /* Put SIBLING into PARENT's place. */ |
| 4036 | replace_window (parent, sibling, 0); |
| 4037 | /* Have SIBLING inherit the following three slot values from |
| 4038 | PARENT (the combination_limit slot is not inherited). */ |
| 4039 | wset_normal_cols (s, p->normal_cols); |
| 4040 | wset_normal_lines (s, p->normal_lines); |
| 4041 | /* Mark PARENT as deleted. */ |
| 4042 | wset_combination (p, 0, Qnil); |
| 4043 | /* Try to merge SIBLING into its new parent. */ |
| 4044 | recombine_windows (sibling); |
| 4045 | } |
| 4046 | |
| 4047 | adjust_frame_glyphs (f); |
| 4048 | |
| 4049 | if (!WINDOW_LIVE_P (FRAME_SELECTED_WINDOW (f))) |
| 4050 | /* We deleted the frame's selected window. */ |
| 4051 | { |
| 4052 | /* Use the frame's first window as fallback ... */ |
| 4053 | Lisp_Object new_selected_window = Fframe_first_window (frame); |
| 4054 | /* ... but preferably use its most recently used window. */ |
| 4055 | Lisp_Object mru_window; |
| 4056 | |
| 4057 | /* `get-mru-window' might fail for some reason so play it safe |
| 4058 | - promote the first window _without recording it_ first. */ |
| 4059 | if (EQ (FRAME_SELECTED_WINDOW (f), selected_window)) |
| 4060 | Fselect_window (new_selected_window, Qt); |
| 4061 | else |
| 4062 | fset_selected_window (f, new_selected_window); |
| 4063 | |
| 4064 | unblock_input (); |
| 4065 | |
| 4066 | /* Now look whether `get-mru-window' gets us something. */ |
| 4067 | mru_window = call1 (Qget_mru_window, frame); |
| 4068 | if (WINDOW_LIVE_P (mru_window) |
| 4069 | && EQ (XWINDOW (mru_window)->frame, frame)) |
| 4070 | new_selected_window = mru_window; |
| 4071 | |
| 4072 | /* If all ended up well, we now promote the mru window. */ |
| 4073 | if (EQ (FRAME_SELECTED_WINDOW (f), selected_window)) |
| 4074 | Fselect_window (new_selected_window, Qnil); |
| 4075 | else |
| 4076 | fset_selected_window (f, new_selected_window); |
| 4077 | } |
| 4078 | else |
| 4079 | unblock_input (); |
| 4080 | |
| 4081 | /* Must be run by the caller: |
| 4082 | run_window_configuration_change_hook (f); */ |
| 4083 | } |
| 4084 | else |
| 4085 | /* We failed: Relink WINDOW into window tree. */ |
| 4086 | { |
| 4087 | if (before_sibling) |
| 4088 | { |
| 4089 | wset_prev (s, window); |
| 4090 | wset_combination (p, horflag, window); |
| 4091 | } |
| 4092 | else |
| 4093 | { |
| 4094 | wset_next (s, window); |
| 4095 | if (!NILP (w->next)) |
| 4096 | wset_prev (XWINDOW (w->next), window); |
| 4097 | } |
| 4098 | error ("Deletion failed"); |
| 4099 | } |
| 4100 | |
| 4101 | return Qnil; |
| 4102 | } |
| 4103 | \f |
| 4104 | /*********************************************************************** |
| 4105 | Resizing Mini-Windows |
| 4106 | ***********************************************************************/ |
| 4107 | |
| 4108 | /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we |
| 4109 | can. */ |
| 4110 | void |
| 4111 | grow_mini_window (struct window *w, int delta) |
| 4112 | { |
| 4113 | struct frame *f = XFRAME (w->frame); |
| 4114 | struct window *r; |
| 4115 | Lisp_Object root, value; |
| 4116 | |
| 4117 | eassert (MINI_WINDOW_P (w)); |
| 4118 | eassert (delta >= 0); |
| 4119 | |
| 4120 | root = FRAME_ROOT_WINDOW (f); |
| 4121 | r = XWINDOW (root); |
| 4122 | value = call2 (Qwindow_resize_root_window_vertically, |
| 4123 | root, make_number (- delta)); |
| 4124 | if (INTEGERP (value) && window_resize_check (r, 0)) |
| 4125 | { |
| 4126 | block_input (); |
| 4127 | window_resize_apply (r, 0); |
| 4128 | |
| 4129 | /* Grow the mini-window. */ |
| 4130 | w->top_line = r->top_line + r->total_lines; |
| 4131 | w->total_lines -= XINT (value); |
| 4132 | /* Enforce full redisplay. FIXME: make it more selective. */ |
| 4133 | windows_or_buffers_changed++; |
| 4134 | adjust_frame_glyphs (f); |
| 4135 | unblock_input (); |
| 4136 | } |
| 4137 | } |
| 4138 | |
| 4139 | |
| 4140 | /* Shrink mini-window W. */ |
| 4141 | void |
| 4142 | shrink_mini_window (struct window *w) |
| 4143 | { |
| 4144 | struct frame *f = XFRAME (w->frame); |
| 4145 | struct window *r; |
| 4146 | Lisp_Object root, value; |
| 4147 | EMACS_INT size; |
| 4148 | |
| 4149 | eassert (MINI_WINDOW_P (w)); |
| 4150 | |
| 4151 | size = w->total_lines; |
| 4152 | if (size > 1) |
| 4153 | { |
| 4154 | root = FRAME_ROOT_WINDOW (f); |
| 4155 | r = XWINDOW (root); |
| 4156 | value = call2 (Qwindow_resize_root_window_vertically, |
| 4157 | root, make_number (size - 1)); |
| 4158 | if (INTEGERP (value) && window_resize_check (r, 0)) |
| 4159 | { |
| 4160 | block_input (); |
| 4161 | window_resize_apply (r, 0); |
| 4162 | |
| 4163 | /* Shrink the mini-window. */ |
| 4164 | w->top_line = r->top_line + r->total_lines; |
| 4165 | w->total_lines = 1; |
| 4166 | /* Enforce full redisplay. FIXME: make it more selective. */ |
| 4167 | windows_or_buffers_changed++; |
| 4168 | adjust_frame_glyphs (f); |
| 4169 | unblock_input (); |
| 4170 | } |
| 4171 | /* If the above failed for whatever strange reason we must make a |
| 4172 | one window frame here. The same routine will be needed when |
| 4173 | shrinking the frame (and probably when making the initial |
| 4174 | *scratch* window). For the moment leave things as they are. */ |
| 4175 | } |
| 4176 | } |
| 4177 | |
| 4178 | DEFUN ("resize-mini-window-internal", Fresize_mini_window_internal, Sresize_mini_window_internal, 1, 1, 0, |
| 4179 | doc: /* Resize minibuffer window WINDOW. */) |
| 4180 | (Lisp_Object window) |
| 4181 | { |
| 4182 | struct window *w = XWINDOW (window); |
| 4183 | struct window *r; |
| 4184 | struct frame *f; |
| 4185 | int height; |
| 4186 | |
| 4187 | CHECK_WINDOW (window); |
| 4188 | f = XFRAME (w->frame); |
| 4189 | |
| 4190 | if (!EQ (FRAME_MINIBUF_WINDOW (XFRAME (w->frame)), window)) |
| 4191 | error ("Not a valid minibuffer window"); |
| 4192 | else if (FRAME_MINIBUF_ONLY_P (f)) |
| 4193 | error ("Cannot resize a minibuffer-only frame"); |
| 4194 | |
| 4195 | r = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 4196 | height = r->total_lines + w->total_lines; |
| 4197 | if (window_resize_check (r, 0) |
| 4198 | && XINT (w->new_total) > 0 |
| 4199 | && height == XINT (r->new_total) + XINT (w->new_total)) |
| 4200 | { |
| 4201 | block_input (); |
| 4202 | window_resize_apply (r, 0); |
| 4203 | |
| 4204 | w->total_lines = XFASTINT (w->new_total); |
| 4205 | w->top_line = r->top_line + r->total_lines; |
| 4206 | |
| 4207 | windows_or_buffers_changed++; |
| 4208 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 4209 | adjust_frame_glyphs (f); |
| 4210 | unblock_input (); |
| 4211 | |
| 4212 | run_window_configuration_change_hook (f); |
| 4213 | return Qt; |
| 4214 | } |
| 4215 | else error ("Failed to resize minibuffer window"); |
| 4216 | } |
| 4217 | \f |
| 4218 | /* Mark window cursors off for all windows in the window tree rooted |
| 4219 | at W by setting their phys_cursor_on_p flag to zero. Called from |
| 4220 | xterm.c, e.g. when a frame is cleared and thereby all cursors on |
| 4221 | the frame are cleared. */ |
| 4222 | |
| 4223 | void |
| 4224 | mark_window_cursors_off (struct window *w) |
| 4225 | { |
| 4226 | while (w) |
| 4227 | { |
| 4228 | if (WINDOWP (w->contents)) |
| 4229 | mark_window_cursors_off (XWINDOW (w->contents)); |
| 4230 | else |
| 4231 | w->phys_cursor_on_p = 0; |
| 4232 | |
| 4233 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 4234 | } |
| 4235 | } |
| 4236 | |
| 4237 | |
| 4238 | /* Return number of lines of text (not counting mode lines) in W. */ |
| 4239 | |
| 4240 | int |
| 4241 | window_internal_height (struct window *w) |
| 4242 | { |
| 4243 | int ht = w->total_lines; |
| 4244 | |
| 4245 | if (!MINI_WINDOW_P (w)) |
| 4246 | { |
| 4247 | if (!NILP (w->parent) |
| 4248 | || WINDOWP (w->contents) |
| 4249 | || !NILP (w->next) |
| 4250 | || !NILP (w->prev) |
| 4251 | || WINDOW_WANTS_MODELINE_P (w)) |
| 4252 | --ht; |
| 4253 | |
| 4254 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
| 4255 | --ht; |
| 4256 | } |
| 4257 | |
| 4258 | return ht; |
| 4259 | } |
| 4260 | \f |
| 4261 | /************************************************************************ |
| 4262 | Window Scrolling |
| 4263 | ***********************************************************************/ |
| 4264 | |
| 4265 | /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll |
| 4266 | N screen-fulls, which is defined as the height of the window minus |
| 4267 | next_screen_context_lines. If WHOLE is zero, scroll up N lines |
| 4268 | instead. Negative values of N mean scroll down. NOERROR non-zero |
| 4269 | means don't signal an error if we try to move over BEGV or ZV, |
| 4270 | respectively. */ |
| 4271 | |
| 4272 | static void |
| 4273 | window_scroll (Lisp_Object window, EMACS_INT n, bool whole, int noerror) |
| 4274 | { |
| 4275 | immediate_quit = 1; |
| 4276 | n = clip_to_bounds (INT_MIN, n, INT_MAX); |
| 4277 | |
| 4278 | /* If we must, use the pixel-based version which is much slower than |
| 4279 | the line-based one but can handle varying line heights. */ |
| 4280 | if (FRAME_WINDOW_P (XFRAME (XWINDOW (window)->frame))) |
| 4281 | window_scroll_pixel_based (window, n, whole, noerror); |
| 4282 | else |
| 4283 | window_scroll_line_based (window, n, whole, noerror); |
| 4284 | |
| 4285 | immediate_quit = 0; |
| 4286 | } |
| 4287 | |
| 4288 | |
| 4289 | /* Implementation of window_scroll that works based on pixel line |
| 4290 | heights. See the comment of window_scroll for parameter |
| 4291 | descriptions. */ |
| 4292 | |
| 4293 | static void |
| 4294 | window_scroll_pixel_based (Lisp_Object window, int n, bool whole, int noerror) |
| 4295 | { |
| 4296 | struct it it; |
| 4297 | struct window *w = XWINDOW (window); |
| 4298 | struct text_pos start; |
| 4299 | int this_scroll_margin; |
| 4300 | /* True if we fiddled the window vscroll field without really scrolling. */ |
| 4301 | int vscrolled = 0; |
| 4302 | int x, y, rtop, rbot, rowh, vpos; |
| 4303 | void *itdata = NULL; |
| 4304 | int window_total_lines; |
| 4305 | int frame_line_height = default_line_pixel_height (w); |
| 4306 | |
| 4307 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 4308 | /* Scrolling a minibuffer window via scroll bar when the echo area |
| 4309 | shows long text sometimes resets the minibuffer contents behind |
| 4310 | our backs. */ |
| 4311 | if (CHARPOS (start) > ZV) |
| 4312 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); |
| 4313 | |
| 4314 | /* If PT is not visible in WINDOW, move back one half of |
| 4315 | the screen. Allow PT to be partially visible, otherwise |
| 4316 | something like (scroll-down 1) with PT in the line before |
| 4317 | the partially visible one would recenter. */ |
| 4318 | |
| 4319 | if (!pos_visible_p (w, PT, &x, &y, &rtop, &rbot, &rowh, &vpos)) |
| 4320 | { |
| 4321 | itdata = bidi_shelve_cache (); |
| 4322 | /* Move backward half the height of the window. Performance note: |
| 4323 | vmotion used here is about 10% faster, but would give wrong |
| 4324 | results for variable height lines. */ |
| 4325 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); |
| 4326 | it.current_y = it.last_visible_y; |
| 4327 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
| 4328 | |
| 4329 | /* The function move_iterator_vertically may move over more than |
| 4330 | the specified y-distance. If it->w is small, e.g. a |
| 4331 | mini-buffer window, we may end up in front of the window's |
| 4332 | display area. This is the case when Start displaying at the |
| 4333 | start of the line containing PT in this case. */ |
| 4334 | if (it.current_y <= 0) |
| 4335 | { |
| 4336 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); |
| 4337 | move_it_vertically_backward (&it, 0); |
| 4338 | it.current_y = 0; |
| 4339 | } |
| 4340 | |
| 4341 | start = it.current.pos; |
| 4342 | bidi_unshelve_cache (itdata, 0); |
| 4343 | } |
| 4344 | else if (auto_window_vscroll_p) |
| 4345 | { |
| 4346 | if (rtop || rbot) /* partially visible */ |
| 4347 | { |
| 4348 | int px; |
| 4349 | int dy = frame_line_height; |
| 4350 | if (whole) |
| 4351 | dy = max ((window_box_height (w) |
| 4352 | - next_screen_context_lines * dy), |
| 4353 | dy); |
| 4354 | dy *= n; |
| 4355 | |
| 4356 | if (n < 0) |
| 4357 | { |
| 4358 | /* Only vscroll backwards if already vscrolled forwards. */ |
| 4359 | if (w->vscroll < 0 && rtop > 0) |
| 4360 | { |
| 4361 | px = max (0, -w->vscroll - min (rtop, -dy)); |
| 4362 | Fset_window_vscroll (window, make_number (px), Qt); |
| 4363 | return; |
| 4364 | } |
| 4365 | } |
| 4366 | if (n > 0) |
| 4367 | { |
| 4368 | /* Do vscroll if already vscrolled or only display line. */ |
| 4369 | if (rbot > 0 && (w->vscroll < 0 || vpos == 0)) |
| 4370 | { |
| 4371 | px = max (0, -w->vscroll + min (rbot, dy)); |
| 4372 | Fset_window_vscroll (window, make_number (px), Qt); |
| 4373 | return; |
| 4374 | } |
| 4375 | |
| 4376 | /* Maybe modify window start instead of scrolling. */ |
| 4377 | if (rbot > 0 || w->vscroll < 0) |
| 4378 | { |
| 4379 | ptrdiff_t spos; |
| 4380 | |
| 4381 | Fset_window_vscroll (window, make_number (0), Qt); |
| 4382 | /* If there are other text lines above the current row, |
| 4383 | move window start to current row. Else to next row. */ |
| 4384 | if (rbot > 0) |
| 4385 | spos = XINT (Fline_beginning_position (Qnil)); |
| 4386 | else |
| 4387 | spos = min (XINT (Fline_end_position (Qnil)) + 1, ZV); |
| 4388 | set_marker_restricted (w->start, make_number (spos), |
| 4389 | w->contents); |
| 4390 | w->start_at_line_beg = 1; |
| 4391 | w->update_mode_line = 1; |
| 4392 | /* Set force_start so that redisplay_window will run the |
| 4393 | window-scroll-functions. */ |
| 4394 | w->force_start = 1; |
| 4395 | return; |
| 4396 | } |
| 4397 | } |
| 4398 | } |
| 4399 | /* Cancel previous vscroll. */ |
| 4400 | Fset_window_vscroll (window, make_number (0), Qt); |
| 4401 | } |
| 4402 | |
| 4403 | itdata = bidi_shelve_cache (); |
| 4404 | /* If scroll_preserve_screen_position is non-nil, we try to set |
| 4405 | point in the same window line as it is now, so get that line. */ |
| 4406 | if (!NILP (Vscroll_preserve_screen_position)) |
| 4407 | { |
| 4408 | /* We preserve the goal pixel coordinate across consecutive |
| 4409 | calls to scroll-up, scroll-down and other commands that |
| 4410 | have the `scroll-command' property. This avoids the |
| 4411 | possibility of point becoming "stuck" on a tall line when |
| 4412 | scrolling by one line. */ |
| 4413 | if (window_scroll_pixel_based_preserve_y < 0 |
| 4414 | || !SYMBOLP (KVAR (current_kboard, Vlast_command)) |
| 4415 | || NILP (Fget (KVAR (current_kboard, Vlast_command), Qscroll_command))) |
| 4416 | { |
| 4417 | start_display (&it, w, start); |
| 4418 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); |
| 4419 | window_scroll_pixel_based_preserve_y = it.current_y; |
| 4420 | window_scroll_pixel_based_preserve_x = it.current_x; |
| 4421 | } |
| 4422 | } |
| 4423 | else |
| 4424 | window_scroll_pixel_based_preserve_y |
| 4425 | = window_scroll_pixel_based_preserve_x = -1; |
| 4426 | |
| 4427 | /* Move iterator it from start the specified distance forward or |
| 4428 | backward. The result is the new window start. */ |
| 4429 | start_display (&it, w, start); |
| 4430 | if (whole) |
| 4431 | { |
| 4432 | ptrdiff_t start_pos = IT_CHARPOS (it); |
| 4433 | int dy = frame_line_height; |
| 4434 | dy = max ((window_box_height (w) |
| 4435 | - next_screen_context_lines * dy), |
| 4436 | dy) * n; |
| 4437 | |
| 4438 | /* Note that move_it_vertically always moves the iterator to the |
| 4439 | start of a line. So, if the last line doesn't have a newline, |
| 4440 | we would end up at the start of the line ending at ZV. */ |
| 4441 | if (dy <= 0) |
| 4442 | { |
| 4443 | move_it_vertically_backward (&it, -dy); |
| 4444 | /* Ensure we actually do move, e.g. in case we are currently |
| 4445 | looking at an image that is taller that the window height. */ |
| 4446 | while (start_pos == IT_CHARPOS (it) |
| 4447 | && start_pos > BEGV) |
| 4448 | move_it_by_lines (&it, -1); |
| 4449 | } |
| 4450 | else if (dy > 0) |
| 4451 | { |
| 4452 | move_it_to (&it, ZV, -1, it.current_y + dy, -1, |
| 4453 | MOVE_TO_POS | MOVE_TO_Y); |
| 4454 | /* Ensure we actually do move, e.g. in case we are currently |
| 4455 | looking at an image that is taller that the window height. */ |
| 4456 | while (start_pos == IT_CHARPOS (it) |
| 4457 | && start_pos < ZV) |
| 4458 | move_it_by_lines (&it, 1); |
| 4459 | } |
| 4460 | } |
| 4461 | else |
| 4462 | move_it_by_lines (&it, n); |
| 4463 | |
| 4464 | /* We failed if we find ZV is already on the screen (scrolling up, |
| 4465 | means there's nothing past the end), or if we can't start any |
| 4466 | earlier (scrolling down, means there's nothing past the top). */ |
| 4467 | if ((n > 0 && IT_CHARPOS (it) == ZV) |
| 4468 | || (n < 0 && IT_CHARPOS (it) == CHARPOS (start))) |
| 4469 | { |
| 4470 | if (IT_CHARPOS (it) == ZV) |
| 4471 | { |
| 4472 | if (it.current_y < it.last_visible_y |
| 4473 | && (it.current_y + it.max_ascent + it.max_descent |
| 4474 | > it.last_visible_y)) |
| 4475 | { |
| 4476 | /* The last line was only partially visible, make it fully |
| 4477 | visible. */ |
| 4478 | w->vscroll = (it.last_visible_y |
| 4479 | - it.current_y + it.max_ascent + it.max_descent); |
| 4480 | adjust_frame_glyphs (it.f); |
| 4481 | } |
| 4482 | else |
| 4483 | { |
| 4484 | bidi_unshelve_cache (itdata, 0); |
| 4485 | if (noerror) |
| 4486 | return; |
| 4487 | else if (n < 0) /* could happen with empty buffers */ |
| 4488 | xsignal0 (Qbeginning_of_buffer); |
| 4489 | else |
| 4490 | xsignal0 (Qend_of_buffer); |
| 4491 | } |
| 4492 | } |
| 4493 | else |
| 4494 | { |
| 4495 | if (w->vscroll != 0) |
| 4496 | /* The first line was only partially visible, make it fully |
| 4497 | visible. */ |
| 4498 | w->vscroll = 0; |
| 4499 | else |
| 4500 | { |
| 4501 | bidi_unshelve_cache (itdata, 0); |
| 4502 | if (noerror) |
| 4503 | return; |
| 4504 | else |
| 4505 | xsignal0 (Qbeginning_of_buffer); |
| 4506 | } |
| 4507 | } |
| 4508 | |
| 4509 | /* If control gets here, then we vscrolled. */ |
| 4510 | |
| 4511 | XBUFFER (w->contents)->prevent_redisplay_optimizations_p = 1; |
| 4512 | |
| 4513 | /* Don't try to change the window start below. */ |
| 4514 | vscrolled = 1; |
| 4515 | } |
| 4516 | |
| 4517 | if (! vscrolled) |
| 4518 | { |
| 4519 | ptrdiff_t pos = IT_CHARPOS (it); |
| 4520 | ptrdiff_t bytepos; |
| 4521 | |
| 4522 | /* If in the middle of a multi-glyph character move forward to |
| 4523 | the next character. */ |
| 4524 | if (in_display_vector_p (&it)) |
| 4525 | { |
| 4526 | ++pos; |
| 4527 | move_it_to (&it, pos, -1, -1, -1, MOVE_TO_POS); |
| 4528 | } |
| 4529 | |
| 4530 | /* Set the window start, and set up the window for redisplay. */ |
| 4531 | set_marker_restricted_both (w->start, w->contents, IT_CHARPOS (it), |
| 4532 | IT_BYTEPOS (it)); |
| 4533 | bytepos = marker_byte_position (w->start); |
| 4534 | w->start_at_line_beg = (pos == BEGV || FETCH_BYTE (bytepos - 1) == '\n'); |
| 4535 | w->update_mode_line = 1; |
| 4536 | /* Set force_start so that redisplay_window will run the |
| 4537 | window-scroll-functions. */ |
| 4538 | w->force_start = 1; |
| 4539 | } |
| 4540 | |
| 4541 | /* The rest of this function uses current_y in a nonstandard way, |
| 4542 | not including the height of the header line if any. */ |
| 4543 | it.current_y = it.vpos = 0; |
| 4544 | |
| 4545 | /* Move PT out of scroll margins. |
| 4546 | This code wants current_y to be zero at the window start position |
| 4547 | even if there is a header line. */ |
| 4548 | window_total_lines |
| 4549 | = w->total_lines * WINDOW_FRAME_LINE_HEIGHT (w) / frame_line_height; |
| 4550 | this_scroll_margin = max (0, scroll_margin); |
| 4551 | this_scroll_margin |
| 4552 | = min (this_scroll_margin, window_total_lines / 4); |
| 4553 | this_scroll_margin *= frame_line_height; |
| 4554 | |
| 4555 | if (n > 0) |
| 4556 | { |
| 4557 | /* We moved the window start towards ZV, so PT may be now |
| 4558 | in the scroll margin at the top. */ |
| 4559 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); |
| 4560 | if (IT_CHARPOS (it) == PT && it.current_y >= this_scroll_margin |
| 4561 | && (NILP (Vscroll_preserve_screen_position) |
| 4562 | || EQ (Vscroll_preserve_screen_position, Qt))) |
| 4563 | /* We found PT at a legitimate height. Leave it alone. */ |
| 4564 | ; |
| 4565 | else if (window_scroll_pixel_based_preserve_y >= 0) |
| 4566 | { |
| 4567 | /* If we have a header line, take account of it. |
| 4568 | This is necessary because we set it.current_y to 0, above. */ |
| 4569 | move_it_to (&it, -1, |
| 4570 | window_scroll_pixel_based_preserve_x, |
| 4571 | window_scroll_pixel_based_preserve_y |
| 4572 | - (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0 ), |
| 4573 | -1, MOVE_TO_Y | MOVE_TO_X); |
| 4574 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4575 | } |
| 4576 | else |
| 4577 | { |
| 4578 | while (it.current_y < this_scroll_margin) |
| 4579 | { |
| 4580 | int prev = it.current_y; |
| 4581 | move_it_by_lines (&it, 1); |
| 4582 | if (prev == it.current_y) |
| 4583 | break; |
| 4584 | } |
| 4585 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4586 | } |
| 4587 | } |
| 4588 | else if (n < 0) |
| 4589 | { |
| 4590 | ptrdiff_t charpos, bytepos; |
| 4591 | int partial_p; |
| 4592 | |
| 4593 | /* Save our position, for the |
| 4594 | window_scroll_pixel_based_preserve_y case. */ |
| 4595 | charpos = IT_CHARPOS (it); |
| 4596 | bytepos = IT_BYTEPOS (it); |
| 4597 | |
| 4598 | /* We moved the window start towards BEGV, so PT may be now |
| 4599 | in the scroll margin at the bottom. */ |
| 4600 | move_it_to (&it, PT, -1, |
| 4601 | (it.last_visible_y - CURRENT_HEADER_LINE_HEIGHT (w) |
| 4602 | - this_scroll_margin - 1), |
| 4603 | -1, |
| 4604 | MOVE_TO_POS | MOVE_TO_Y); |
| 4605 | |
| 4606 | /* Save our position, in case it's correct. */ |
| 4607 | charpos = IT_CHARPOS (it); |
| 4608 | bytepos = IT_BYTEPOS (it); |
| 4609 | |
| 4610 | /* See if point is on a partially visible line at the end. */ |
| 4611 | if (it.what == IT_EOB) |
| 4612 | partial_p = it.current_y + it.ascent + it.descent > it.last_visible_y; |
| 4613 | else |
| 4614 | { |
| 4615 | move_it_by_lines (&it, 1); |
| 4616 | partial_p = it.current_y > it.last_visible_y; |
| 4617 | } |
| 4618 | |
| 4619 | if (charpos == PT && !partial_p |
| 4620 | && (NILP (Vscroll_preserve_screen_position) |
| 4621 | || EQ (Vscroll_preserve_screen_position, Qt))) |
| 4622 | /* We found PT before we found the display margin, so PT is ok. */ |
| 4623 | ; |
| 4624 | else if (window_scroll_pixel_based_preserve_y >= 0) |
| 4625 | { |
| 4626 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 4627 | start_display (&it, w, start); |
| 4628 | /* It would be wrong to subtract CURRENT_HEADER_LINE_HEIGHT |
| 4629 | here because we called start_display again and did not |
| 4630 | alter it.current_y this time. */ |
| 4631 | move_it_to (&it, -1, window_scroll_pixel_based_preserve_x, |
| 4632 | window_scroll_pixel_based_preserve_y, -1, |
| 4633 | MOVE_TO_Y | MOVE_TO_X); |
| 4634 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4635 | } |
| 4636 | else |
| 4637 | { |
| 4638 | if (partial_p) |
| 4639 | /* The last line was only partially visible, so back up two |
| 4640 | lines to make sure we're on a fully visible line. */ |
| 4641 | { |
| 4642 | move_it_by_lines (&it, -2); |
| 4643 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4644 | } |
| 4645 | else |
| 4646 | /* No, the position we saved is OK, so use it. */ |
| 4647 | SET_PT_BOTH (charpos, bytepos); |
| 4648 | } |
| 4649 | } |
| 4650 | bidi_unshelve_cache (itdata, 0); |
| 4651 | } |
| 4652 | |
| 4653 | |
| 4654 | /* Implementation of window_scroll that works based on screen lines. |
| 4655 | See the comment of window_scroll for parameter descriptions. */ |
| 4656 | |
| 4657 | static void |
| 4658 | window_scroll_line_based (Lisp_Object window, int n, bool whole, int noerror) |
| 4659 | { |
| 4660 | register struct window *w = XWINDOW (window); |
| 4661 | /* Fvertical_motion enters redisplay, which can trigger |
| 4662 | fontification, which in turn can modify buffer text (e.g., if the |
| 4663 | fontification functions replace escape sequences with faces, as |
| 4664 | in `grep-mode-font-lock-keywords'). So we use a marker to record |
| 4665 | the old point position, to prevent crashes in SET_PT_BOTH. */ |
| 4666 | Lisp_Object opoint_marker = Fpoint_marker (); |
| 4667 | register ptrdiff_t pos, pos_byte; |
| 4668 | register int ht = window_internal_height (w); |
| 4669 | register Lisp_Object tem; |
| 4670 | bool lose; |
| 4671 | Lisp_Object bolp; |
| 4672 | ptrdiff_t startpos = marker_position (w->start); |
| 4673 | ptrdiff_t startbyte = marker_byte_position (w->start); |
| 4674 | Lisp_Object original_pos = Qnil; |
| 4675 | |
| 4676 | /* If scrolling screen-fulls, compute the number of lines to |
| 4677 | scroll from the window's height. */ |
| 4678 | if (whole) |
| 4679 | n *= max (1, ht - next_screen_context_lines); |
| 4680 | |
| 4681 | if (!NILP (Vscroll_preserve_screen_position)) |
| 4682 | { |
| 4683 | if (window_scroll_preserve_vpos <= 0 |
| 4684 | || !SYMBOLP (KVAR (current_kboard, Vlast_command)) |
| 4685 | || NILP (Fget (KVAR (current_kboard, Vlast_command), Qscroll_command))) |
| 4686 | { |
| 4687 | struct position posit |
| 4688 | = *compute_motion (startpos, startbyte, 0, 0, 0, |
| 4689 | PT, ht, 0, -1, w->hscroll, 0, w); |
| 4690 | window_scroll_preserve_vpos = posit.vpos; |
| 4691 | window_scroll_preserve_hpos = posit.hpos + w->hscroll; |
| 4692 | } |
| 4693 | |
| 4694 | original_pos = Fcons (make_number (window_scroll_preserve_hpos), |
| 4695 | make_number (window_scroll_preserve_vpos)); |
| 4696 | } |
| 4697 | |
| 4698 | XSETFASTINT (tem, PT); |
| 4699 | tem = Fpos_visible_in_window_p (tem, window, Qnil); |
| 4700 | |
| 4701 | if (NILP (tem)) |
| 4702 | { |
| 4703 | Fvertical_motion (make_number (- (ht / 2)), window); |
| 4704 | startpos = PT; |
| 4705 | startbyte = PT_BYTE; |
| 4706 | } |
| 4707 | |
| 4708 | SET_PT_BOTH (startpos, startbyte); |
| 4709 | lose = n < 0 && PT == BEGV; |
| 4710 | Fvertical_motion (make_number (n), window); |
| 4711 | pos = PT; |
| 4712 | pos_byte = PT_BYTE; |
| 4713 | bolp = Fbolp (); |
| 4714 | SET_PT_BOTH (marker_position (opoint_marker), |
| 4715 | marker_byte_position (opoint_marker)); |
| 4716 | |
| 4717 | if (lose) |
| 4718 | { |
| 4719 | if (noerror) |
| 4720 | return; |
| 4721 | else |
| 4722 | xsignal0 (Qbeginning_of_buffer); |
| 4723 | } |
| 4724 | |
| 4725 | if (pos < ZV) |
| 4726 | { |
| 4727 | /* Don't use a scroll margin that is negative or too large. */ |
| 4728 | int this_scroll_margin = |
| 4729 | max (0, min (scroll_margin, w->total_lines / 4)); |
| 4730 | |
| 4731 | set_marker_restricted_both (w->start, w->contents, pos, pos_byte); |
| 4732 | w->start_at_line_beg = !NILP (bolp); |
| 4733 | w->update_mode_line = 1; |
| 4734 | /* Set force_start so that redisplay_window will run |
| 4735 | the window-scroll-functions. */ |
| 4736 | w->force_start = 1; |
| 4737 | |
| 4738 | if (!NILP (Vscroll_preserve_screen_position) |
| 4739 | && (whole || !EQ (Vscroll_preserve_screen_position, Qt))) |
| 4740 | { |
| 4741 | SET_PT_BOTH (pos, pos_byte); |
| 4742 | Fvertical_motion (original_pos, window); |
| 4743 | } |
| 4744 | /* If we scrolled forward, put point enough lines down |
| 4745 | that it is outside the scroll margin. */ |
| 4746 | else if (n > 0) |
| 4747 | { |
| 4748 | int top_margin; |
| 4749 | |
| 4750 | if (this_scroll_margin > 0) |
| 4751 | { |
| 4752 | SET_PT_BOTH (pos, pos_byte); |
| 4753 | Fvertical_motion (make_number (this_scroll_margin), window); |
| 4754 | top_margin = PT; |
| 4755 | } |
| 4756 | else |
| 4757 | top_margin = pos; |
| 4758 | |
| 4759 | if (top_margin <= marker_position (opoint_marker)) |
| 4760 | SET_PT_BOTH (marker_position (opoint_marker), |
| 4761 | marker_byte_position (opoint_marker)); |
| 4762 | else if (!NILP (Vscroll_preserve_screen_position)) |
| 4763 | { |
| 4764 | SET_PT_BOTH (pos, pos_byte); |
| 4765 | Fvertical_motion (original_pos, window); |
| 4766 | } |
| 4767 | else |
| 4768 | SET_PT (top_margin); |
| 4769 | } |
| 4770 | else if (n < 0) |
| 4771 | { |
| 4772 | int bottom_margin; |
| 4773 | |
| 4774 | /* If we scrolled backward, put point near the end of the window |
| 4775 | but not within the scroll margin. */ |
| 4776 | SET_PT_BOTH (pos, pos_byte); |
| 4777 | tem = Fvertical_motion (make_number (ht - this_scroll_margin), window); |
| 4778 | if (XFASTINT (tem) == ht - this_scroll_margin) |
| 4779 | bottom_margin = PT; |
| 4780 | else |
| 4781 | bottom_margin = PT + 1; |
| 4782 | |
| 4783 | if (bottom_margin > marker_position (opoint_marker)) |
| 4784 | SET_PT_BOTH (marker_position (opoint_marker), |
| 4785 | marker_byte_position (opoint_marker)); |
| 4786 | else |
| 4787 | { |
| 4788 | if (!NILP (Vscroll_preserve_screen_position)) |
| 4789 | { |
| 4790 | SET_PT_BOTH (pos, pos_byte); |
| 4791 | Fvertical_motion (original_pos, window); |
| 4792 | } |
| 4793 | else |
| 4794 | Fvertical_motion (make_number (-1), window); |
| 4795 | } |
| 4796 | } |
| 4797 | } |
| 4798 | else |
| 4799 | { |
| 4800 | if (noerror) |
| 4801 | return; |
| 4802 | else |
| 4803 | xsignal0 (Qend_of_buffer); |
| 4804 | } |
| 4805 | } |
| 4806 | |
| 4807 | |
| 4808 | /* Scroll selected_window up or down. If N is nil, scroll a |
| 4809 | screen-full which is defined as the height of the window minus |
| 4810 | next_screen_context_lines. If N is the symbol `-', scroll. |
| 4811 | DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll |
| 4812 | up. This is the guts of Fscroll_up and Fscroll_down. */ |
| 4813 | |
| 4814 | static void |
| 4815 | scroll_command (Lisp_Object n, int direction) |
| 4816 | { |
| 4817 | ptrdiff_t count = SPECPDL_INDEX (); |
| 4818 | |
| 4819 | eassert (eabs (direction) == 1); |
| 4820 | |
| 4821 | /* If selected window's buffer isn't current, make it current for |
| 4822 | the moment. But don't screw up if window_scroll gets an error. */ |
| 4823 | if (XBUFFER (XWINDOW (selected_window)->contents) != current_buffer) |
| 4824 | { |
| 4825 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 4826 | Fset_buffer (XWINDOW (selected_window)->contents); |
| 4827 | |
| 4828 | /* Make redisplay consider other windows than just selected_window. */ |
| 4829 | ++windows_or_buffers_changed; |
| 4830 | } |
| 4831 | |
| 4832 | if (NILP (n)) |
| 4833 | window_scroll (selected_window, direction, 1, 0); |
| 4834 | else if (EQ (n, Qminus)) |
| 4835 | window_scroll (selected_window, -direction, 1, 0); |
| 4836 | else |
| 4837 | { |
| 4838 | n = Fprefix_numeric_value (n); |
| 4839 | window_scroll (selected_window, XINT (n) * direction, 0, 0); |
| 4840 | } |
| 4841 | |
| 4842 | unbind_to (count, Qnil); |
| 4843 | } |
| 4844 | |
| 4845 | DEFUN ("scroll-up", Fscroll_up, Sscroll_up, 0, 1, "^P", |
| 4846 | doc: /* Scroll text of selected window upward ARG lines. |
| 4847 | If ARG is omitted or nil, scroll upward by a near full screen. |
| 4848 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 4849 | Negative ARG means scroll downward. |
| 4850 | If ARG is the atom `-', scroll downward by nearly full screen. |
| 4851 | When calling from a program, supply as argument a number, nil, or `-'. */) |
| 4852 | (Lisp_Object arg) |
| 4853 | { |
| 4854 | scroll_command (arg, 1); |
| 4855 | return Qnil; |
| 4856 | } |
| 4857 | |
| 4858 | DEFUN ("scroll-down", Fscroll_down, Sscroll_down, 0, 1, "^P", |
| 4859 | doc: /* Scroll text of selected window down ARG lines. |
| 4860 | If ARG is omitted or nil, scroll down by a near full screen. |
| 4861 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 4862 | Negative ARG means scroll upward. |
| 4863 | If ARG is the atom `-', scroll upward by nearly full screen. |
| 4864 | When calling from a program, supply as argument a number, nil, or `-'. */) |
| 4865 | (Lisp_Object arg) |
| 4866 | { |
| 4867 | scroll_command (arg, -1); |
| 4868 | return Qnil; |
| 4869 | } |
| 4870 | \f |
| 4871 | DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling, Sother_window_for_scrolling, 0, 0, 0, |
| 4872 | doc: /* Return the other window for \"other window scroll\" commands. |
| 4873 | If `other-window-scroll-buffer' is non-nil, a window |
| 4874 | showing that buffer is used. |
| 4875 | If in the minibuffer, `minibuffer-scroll-window' if non-nil |
| 4876 | specifies the window. This takes precedence over |
| 4877 | `other-window-scroll-buffer'. */) |
| 4878 | (void) |
| 4879 | { |
| 4880 | Lisp_Object window; |
| 4881 | |
| 4882 | if (MINI_WINDOW_P (XWINDOW (selected_window)) |
| 4883 | && !NILP (Vminibuf_scroll_window)) |
| 4884 | window = Vminibuf_scroll_window; |
| 4885 | /* If buffer is specified, scroll that buffer. */ |
| 4886 | else if (!NILP (Vother_window_scroll_buffer)) |
| 4887 | { |
| 4888 | window = Fget_buffer_window (Vother_window_scroll_buffer, Qnil); |
| 4889 | if (NILP (window)) |
| 4890 | window = display_buffer (Vother_window_scroll_buffer, Qt, Qnil); |
| 4891 | } |
| 4892 | else |
| 4893 | { |
| 4894 | /* Nothing specified; look for a neighboring window on the same |
| 4895 | frame. */ |
| 4896 | window = Fnext_window (selected_window, Qnil, Qnil); |
| 4897 | |
| 4898 | if (EQ (window, selected_window)) |
| 4899 | /* That didn't get us anywhere; look for a window on another |
| 4900 | visible frame. */ |
| 4901 | do |
| 4902 | window = Fnext_window (window, Qnil, Qt); |
| 4903 | while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window)))) |
| 4904 | && ! EQ (window, selected_window)); |
| 4905 | } |
| 4906 | |
| 4907 | CHECK_LIVE_WINDOW (window); |
| 4908 | |
| 4909 | if (EQ (window, selected_window)) |
| 4910 | error ("There is no other window"); |
| 4911 | |
| 4912 | return window; |
| 4913 | } |
| 4914 | |
| 4915 | DEFUN ("scroll-other-window", Fscroll_other_window, Sscroll_other_window, 0, 1, "P", |
| 4916 | doc: /* Scroll next window upward ARG lines; or near full screen if no ARG. |
| 4917 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 4918 | The next window is the one below the current one; or the one at the top |
| 4919 | if the current one is at the bottom. Negative ARG means scroll downward. |
| 4920 | If ARG is the atom `-', scroll downward by nearly full screen. |
| 4921 | When calling from a program, supply as argument a number, nil, or `-'. |
| 4922 | |
| 4923 | If `other-window-scroll-buffer' is non-nil, scroll the window |
| 4924 | showing that buffer, popping the buffer up if necessary. |
| 4925 | If in the minibuffer, `minibuffer-scroll-window' if non-nil |
| 4926 | specifies the window to scroll. This takes precedence over |
| 4927 | `other-window-scroll-buffer'. */) |
| 4928 | (Lisp_Object arg) |
| 4929 | { |
| 4930 | Lisp_Object window; |
| 4931 | struct window *w; |
| 4932 | ptrdiff_t count = SPECPDL_INDEX (); |
| 4933 | |
| 4934 | window = Fother_window_for_scrolling (); |
| 4935 | w = XWINDOW (window); |
| 4936 | |
| 4937 | /* Don't screw up if window_scroll gets an error. */ |
| 4938 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 4939 | ++windows_or_buffers_changed; |
| 4940 | |
| 4941 | Fset_buffer (w->contents); |
| 4942 | SET_PT_BOTH (marker_position (w->pointm), marker_byte_position (w->pointm)); |
| 4943 | |
| 4944 | if (NILP (arg)) |
| 4945 | window_scroll (window, 1, 1, 1); |
| 4946 | else if (EQ (arg, Qminus)) |
| 4947 | window_scroll (window, -1, 1, 1); |
| 4948 | else |
| 4949 | { |
| 4950 | if (CONSP (arg)) |
| 4951 | arg = XCAR (arg); |
| 4952 | CHECK_NUMBER (arg); |
| 4953 | window_scroll (window, XINT (arg), 0, 1); |
| 4954 | } |
| 4955 | |
| 4956 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
| 4957 | unbind_to (count, Qnil); |
| 4958 | |
| 4959 | return Qnil; |
| 4960 | } |
| 4961 | \f |
| 4962 | DEFUN ("scroll-left", Fscroll_left, Sscroll_left, 0, 2, "^P\np", |
| 4963 | doc: /* Scroll selected window display ARG columns left. |
| 4964 | Default for ARG is window width minus 2. |
| 4965 | Value is the total amount of leftward horizontal scrolling in |
| 4966 | effect after the change. |
| 4967 | If SET-MINIMUM is non-nil, the new scroll amount becomes the |
| 4968 | lower bound for automatic scrolling, i.e. automatic scrolling |
| 4969 | will not scroll a window to a column less than the value returned |
| 4970 | by this function. This happens in an interactive call. */) |
| 4971 | (register Lisp_Object arg, Lisp_Object set_minimum) |
| 4972 | { |
| 4973 | struct window *w = XWINDOW (selected_window); |
| 4974 | EMACS_INT requested_arg = (NILP (arg) |
| 4975 | ? window_body_cols (w) - 2 |
| 4976 | : XINT (Fprefix_numeric_value (arg))); |
| 4977 | Lisp_Object result = set_window_hscroll (w, w->hscroll + requested_arg); |
| 4978 | |
| 4979 | if (!NILP (set_minimum)) |
| 4980 | w->min_hscroll = w->hscroll; |
| 4981 | |
| 4982 | return result; |
| 4983 | } |
| 4984 | |
| 4985 | DEFUN ("scroll-right", Fscroll_right, Sscroll_right, 0, 2, "^P\np", |
| 4986 | doc: /* Scroll selected window display ARG columns right. |
| 4987 | Default for ARG is window width minus 2. |
| 4988 | Value is the total amount of leftward horizontal scrolling in |
| 4989 | effect after the change. |
| 4990 | If SET-MINIMUM is non-nil, the new scroll amount becomes the |
| 4991 | lower bound for automatic scrolling, i.e. automatic scrolling |
| 4992 | will not scroll a window to a column less than the value returned |
| 4993 | by this function. This happens in an interactive call. */) |
| 4994 | (register Lisp_Object arg, Lisp_Object set_minimum) |
| 4995 | { |
| 4996 | struct window *w = XWINDOW (selected_window); |
| 4997 | EMACS_INT requested_arg = (NILP (arg) |
| 4998 | ? window_body_cols (w) - 2 |
| 4999 | : XINT (Fprefix_numeric_value (arg))); |
| 5000 | Lisp_Object result = set_window_hscroll (w, w->hscroll - requested_arg); |
| 5001 | |
| 5002 | if (!NILP (set_minimum)) |
| 5003 | w->min_hscroll = w->hscroll; |
| 5004 | |
| 5005 | return result; |
| 5006 | } |
| 5007 | |
| 5008 | DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window, Sminibuffer_selected_window, 0, 0, 0, |
| 5009 | doc: /* Return the window which was selected when entering the minibuffer. |
| 5010 | Returns nil, if selected window is not a minibuffer window. */) |
| 5011 | (void) |
| 5012 | { |
| 5013 | if (minibuf_level > 0 |
| 5014 | && MINI_WINDOW_P (XWINDOW (selected_window)) |
| 5015 | && WINDOW_LIVE_P (minibuf_selected_window)) |
| 5016 | return minibuf_selected_window; |
| 5017 | |
| 5018 | return Qnil; |
| 5019 | } |
| 5020 | |
| 5021 | /* Value is the number of lines actually displayed in window W, |
| 5022 | as opposed to its height. */ |
| 5023 | |
| 5024 | static int |
| 5025 | displayed_window_lines (struct window *w) |
| 5026 | { |
| 5027 | struct it it; |
| 5028 | struct text_pos start; |
| 5029 | int height = window_box_height (w); |
| 5030 | struct buffer *old_buffer; |
| 5031 | int bottom_y; |
| 5032 | void *itdata = NULL; |
| 5033 | |
| 5034 | if (XBUFFER (w->contents) != current_buffer) |
| 5035 | { |
| 5036 | old_buffer = current_buffer; |
| 5037 | set_buffer_internal (XBUFFER (w->contents)); |
| 5038 | } |
| 5039 | else |
| 5040 | old_buffer = NULL; |
| 5041 | |
| 5042 | /* In case W->start is out of the accessible range, do something |
| 5043 | reasonable. This happens in Info mode when Info-scroll-down |
| 5044 | calls (recenter -1) while W->start is 1. */ |
| 5045 | CLIP_TEXT_POS_FROM_MARKER (start, w->start); |
| 5046 | |
| 5047 | itdata = bidi_shelve_cache (); |
| 5048 | start_display (&it, w, start); |
| 5049 | move_it_vertically (&it, height); |
| 5050 | bottom_y = line_bottom_y (&it); |
| 5051 | bidi_unshelve_cache (itdata, 0); |
| 5052 | |
| 5053 | /* rms: On a non-window display, |
| 5054 | the value of it.vpos at the bottom of the screen |
| 5055 | seems to be 1 larger than window_box_height (w). |
| 5056 | This kludge fixes a bug whereby (move-to-window-line -1) |
| 5057 | when ZV is on the last screen line |
| 5058 | moves to the previous screen line instead of the last one. */ |
| 5059 | if (! FRAME_WINDOW_P (XFRAME (w->frame))) |
| 5060 | height++; |
| 5061 | |
| 5062 | /* Add in empty lines at the bottom of the window. */ |
| 5063 | if (bottom_y < height) |
| 5064 | { |
| 5065 | int uy = FRAME_LINE_HEIGHT (it.f); |
| 5066 | it.vpos += (height - bottom_y + uy - 1) / uy; |
| 5067 | } |
| 5068 | |
| 5069 | if (old_buffer) |
| 5070 | set_buffer_internal (old_buffer); |
| 5071 | |
| 5072 | return it.vpos; |
| 5073 | } |
| 5074 | |
| 5075 | |
| 5076 | DEFUN ("recenter", Frecenter, Srecenter, 0, 1, "P", |
| 5077 | doc: /* Center point in selected window and maybe redisplay frame. |
| 5078 | With a numeric prefix argument ARG, recenter putting point on screen line ARG |
| 5079 | relative to the selected window. If ARG is negative, it counts up from the |
| 5080 | bottom of the window. (ARG should be less than the height of the window.) |
| 5081 | |
| 5082 | If ARG is omitted or nil, then recenter with point on the middle line of |
| 5083 | the selected window; if the variable `recenter-redisplay' is non-nil, |
| 5084 | also erase the entire frame and redraw it (when `auto-resize-tool-bars' |
| 5085 | is set to `grow-only', this resets the tool-bar's height to the minimum |
| 5086 | height needed); if `recenter-redisplay' has the special value `tty', |
| 5087 | then only tty frames are redrawn. |
| 5088 | |
| 5089 | Just C-u as prefix means put point in the center of the window |
| 5090 | and redisplay normally--don't erase and redraw the frame. */) |
| 5091 | (register Lisp_Object arg) |
| 5092 | { |
| 5093 | struct window *w = XWINDOW (selected_window); |
| 5094 | struct buffer *buf = XBUFFER (w->contents); |
| 5095 | struct buffer *obuf = current_buffer; |
| 5096 | bool center_p = 0; |
| 5097 | ptrdiff_t charpos, bytepos; |
| 5098 | EMACS_INT iarg IF_LINT (= 0); |
| 5099 | int this_scroll_margin; |
| 5100 | |
| 5101 | /* If redisplay is suppressed due to an error, try again. */ |
| 5102 | obuf->display_error_modiff = 0; |
| 5103 | |
| 5104 | if (NILP (arg)) |
| 5105 | { |
| 5106 | if (!NILP (Vrecenter_redisplay) |
| 5107 | && (!EQ (Vrecenter_redisplay, Qtty) |
| 5108 | || !NILP (Ftty_type (selected_frame)))) |
| 5109 | { |
| 5110 | ptrdiff_t i; |
| 5111 | |
| 5112 | /* Invalidate pixel data calculated for all compositions. */ |
| 5113 | for (i = 0; i < n_compositions; i++) |
| 5114 | composition_table[i]->font = NULL; |
| 5115 | #if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS) |
| 5116 | WINDOW_XFRAME (w)->minimize_tool_bar_window_p = 1; |
| 5117 | #endif |
| 5118 | Fredraw_frame (WINDOW_FRAME (w)); |
| 5119 | SET_FRAME_GARBAGED (WINDOW_XFRAME (w)); |
| 5120 | } |
| 5121 | |
| 5122 | center_p = 1; |
| 5123 | } |
| 5124 | else if (CONSP (arg)) /* Just C-u. */ |
| 5125 | center_p = 1; |
| 5126 | else |
| 5127 | { |
| 5128 | arg = Fprefix_numeric_value (arg); |
| 5129 | CHECK_NUMBER (arg); |
| 5130 | iarg = XINT (arg); |
| 5131 | } |
| 5132 | |
| 5133 | set_buffer_internal (buf); |
| 5134 | |
| 5135 | /* Do this after making BUF current |
| 5136 | in case scroll_margin is buffer-local. */ |
| 5137 | this_scroll_margin = |
| 5138 | max (0, min (scroll_margin, w->total_lines / 4)); |
| 5139 | |
| 5140 | /* Handle centering on a graphical frame specially. Such frames can |
| 5141 | have variable-height lines and centering point on the basis of |
| 5142 | line counts would lead to strange effects. */ |
| 5143 | if (FRAME_WINDOW_P (XFRAME (w->frame))) |
| 5144 | { |
| 5145 | if (center_p) |
| 5146 | { |
| 5147 | struct it it; |
| 5148 | struct text_pos pt; |
| 5149 | void *itdata = bidi_shelve_cache (); |
| 5150 | |
| 5151 | SET_TEXT_POS (pt, PT, PT_BYTE); |
| 5152 | start_display (&it, w, pt); |
| 5153 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
| 5154 | charpos = IT_CHARPOS (it); |
| 5155 | bytepos = IT_BYTEPOS (it); |
| 5156 | bidi_unshelve_cache (itdata, 0); |
| 5157 | } |
| 5158 | else if (iarg < 0) |
| 5159 | { |
| 5160 | struct it it; |
| 5161 | struct text_pos pt; |
| 5162 | ptrdiff_t nlines = min (PTRDIFF_MAX, -iarg); |
| 5163 | int extra_line_spacing; |
| 5164 | int h = window_box_height (w); |
| 5165 | void *itdata = bidi_shelve_cache (); |
| 5166 | |
| 5167 | iarg = - max (-iarg, this_scroll_margin); |
| 5168 | |
| 5169 | SET_TEXT_POS (pt, PT, PT_BYTE); |
| 5170 | start_display (&it, w, pt); |
| 5171 | |
| 5172 | /* Be sure we have the exact height of the full line containing PT. */ |
| 5173 | move_it_by_lines (&it, 0); |
| 5174 | |
| 5175 | /* The amount of pixels we have to move back is the window |
| 5176 | height minus what's displayed in the line containing PT, |
| 5177 | and the lines below. */ |
| 5178 | it.current_y = 0; |
| 5179 | it.vpos = 0; |
| 5180 | move_it_by_lines (&it, nlines); |
| 5181 | |
| 5182 | if (it.vpos == nlines) |
| 5183 | h -= it.current_y; |
| 5184 | else |
| 5185 | { |
| 5186 | /* Last line has no newline */ |
| 5187 | h -= line_bottom_y (&it); |
| 5188 | it.vpos++; |
| 5189 | } |
| 5190 | |
| 5191 | /* Don't reserve space for extra line spacing of last line. */ |
| 5192 | extra_line_spacing = it.max_extra_line_spacing; |
| 5193 | |
| 5194 | /* If we can't move down NLINES lines because we hit |
| 5195 | the end of the buffer, count in some empty lines. */ |
| 5196 | if (it.vpos < nlines) |
| 5197 | { |
| 5198 | nlines -= it.vpos; |
| 5199 | extra_line_spacing = it.extra_line_spacing; |
| 5200 | h -= nlines * (FRAME_LINE_HEIGHT (it.f) + extra_line_spacing); |
| 5201 | } |
| 5202 | if (h <= 0) |
| 5203 | { |
| 5204 | bidi_unshelve_cache (itdata, 0); |
| 5205 | return Qnil; |
| 5206 | } |
| 5207 | |
| 5208 | /* Now find the new top line (starting position) of the window. */ |
| 5209 | start_display (&it, w, pt); |
| 5210 | it.current_y = 0; |
| 5211 | move_it_vertically_backward (&it, h); |
| 5212 | |
| 5213 | /* If extra line spacing is present, we may move too far |
| 5214 | back. This causes the last line to be only partially |
| 5215 | visible (which triggers redisplay to recenter that line |
| 5216 | in the middle), so move forward. |
| 5217 | But ignore extra line spacing on last line, as it is not |
| 5218 | considered to be part of the visible height of the line. |
| 5219 | */ |
| 5220 | h += extra_line_spacing; |
| 5221 | while (-it.current_y > h) |
| 5222 | move_it_by_lines (&it, 1); |
| 5223 | |
| 5224 | charpos = IT_CHARPOS (it); |
| 5225 | bytepos = IT_BYTEPOS (it); |
| 5226 | |
| 5227 | bidi_unshelve_cache (itdata, 0); |
| 5228 | } |
| 5229 | else |
| 5230 | { |
| 5231 | struct position pos; |
| 5232 | |
| 5233 | iarg = max (iarg, this_scroll_margin); |
| 5234 | |
| 5235 | pos = *vmotion (PT, PT_BYTE, -iarg, w); |
| 5236 | charpos = pos.bufpos; |
| 5237 | bytepos = pos.bytepos; |
| 5238 | } |
| 5239 | } |
| 5240 | else |
| 5241 | { |
| 5242 | struct position pos; |
| 5243 | int ht = window_internal_height (w); |
| 5244 | |
| 5245 | if (center_p) |
| 5246 | iarg = ht / 2; |
| 5247 | else if (iarg < 0) |
| 5248 | iarg += ht; |
| 5249 | |
| 5250 | /* Don't let it get into the margin at either top or bottom. */ |
| 5251 | iarg = clip_to_bounds (this_scroll_margin, iarg, |
| 5252 | ht - this_scroll_margin - 1); |
| 5253 | |
| 5254 | pos = *vmotion (PT, PT_BYTE, - iarg, w); |
| 5255 | charpos = pos.bufpos; |
| 5256 | bytepos = pos.bytepos; |
| 5257 | } |
| 5258 | |
| 5259 | /* Set the new window start. */ |
| 5260 | set_marker_both (w->start, w->contents, charpos, bytepos); |
| 5261 | w->window_end_valid = 0; |
| 5262 | |
| 5263 | w->optional_new_start = 1; |
| 5264 | |
| 5265 | w->start_at_line_beg = (bytepos == BEGV_BYTE || |
| 5266 | FETCH_BYTE (bytepos - 1) == '\n'); |
| 5267 | |
| 5268 | set_buffer_internal (obuf); |
| 5269 | return Qnil; |
| 5270 | } |
| 5271 | |
| 5272 | DEFUN ("window-text-height", Fwindow_text_height, Swindow_text_height, |
| 5273 | 0, 1, 0, |
| 5274 | doc: /* Return the height in lines of the text display area of WINDOW. |
| 5275 | WINDOW must be a live window and defaults to the selected one. |
| 5276 | |
| 5277 | The returned height does not include the mode line, any header line, |
| 5278 | nor any partial-height lines at the bottom of the text area. */) |
| 5279 | (Lisp_Object window) |
| 5280 | { |
| 5281 | struct window *w = decode_live_window (window); |
| 5282 | int pixel_height = window_box_height (w); |
| 5283 | int line_height = pixel_height / FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
| 5284 | return make_number (line_height); |
| 5285 | } |
| 5286 | |
| 5287 | |
| 5288 | \f |
| 5289 | DEFUN ("move-to-window-line", Fmove_to_window_line, Smove_to_window_line, |
| 5290 | 1, 1, "P", |
| 5291 | doc: /* Position point relative to window. |
| 5292 | ARG nil means position point at center of window. |
| 5293 | Else, ARG specifies vertical position within the window; |
| 5294 | zero means top of window, negative means relative to bottom of window. */) |
| 5295 | (Lisp_Object arg) |
| 5296 | { |
| 5297 | struct window *w = XWINDOW (selected_window); |
| 5298 | int lines, start; |
| 5299 | Lisp_Object window; |
| 5300 | #if 0 |
| 5301 | int this_scroll_margin; |
| 5302 | #endif |
| 5303 | |
| 5304 | if (!(BUFFERP (w->contents) && XBUFFER (w->contents) == current_buffer)) |
| 5305 | /* This test is needed to make sure PT/PT_BYTE make sense in w->contents |
| 5306 | when passed below to set_marker_both. */ |
| 5307 | error ("move-to-window-line called from unrelated buffer"); |
| 5308 | |
| 5309 | window = selected_window; |
| 5310 | start = marker_position (w->start); |
| 5311 | if (start < BEGV || start > ZV) |
| 5312 | { |
| 5313 | int height = window_internal_height (w); |
| 5314 | Fvertical_motion (make_number (- (height / 2)), window); |
| 5315 | set_marker_both (w->start, w->contents, PT, PT_BYTE); |
| 5316 | w->start_at_line_beg = !NILP (Fbolp ()); |
| 5317 | w->force_start = 1; |
| 5318 | } |
| 5319 | else |
| 5320 | Fgoto_char (w->start); |
| 5321 | |
| 5322 | lines = displayed_window_lines (w); |
| 5323 | |
| 5324 | #if 0 |
| 5325 | this_scroll_margin = max (0, min (scroll_margin, lines / 4)); |
| 5326 | #endif |
| 5327 | |
| 5328 | if (NILP (arg)) |
| 5329 | XSETFASTINT (arg, lines / 2); |
| 5330 | else |
| 5331 | { |
| 5332 | EMACS_INT iarg = XINT (Fprefix_numeric_value (arg)); |
| 5333 | |
| 5334 | if (iarg < 0) |
| 5335 | iarg = iarg + lines; |
| 5336 | |
| 5337 | #if 0 /* This code would prevent move-to-window-line from moving point |
| 5338 | to a place inside the scroll margins (which would cause the |
| 5339 | next redisplay to scroll). I wrote this code, but then concluded |
| 5340 | it is probably better not to install it. However, it is here |
| 5341 | inside #if 0 so as not to lose it. -- rms. */ |
| 5342 | |
| 5343 | /* Don't let it get into the margin at either top or bottom. */ |
| 5344 | iarg = max (iarg, this_scroll_margin); |
| 5345 | iarg = min (iarg, lines - this_scroll_margin - 1); |
| 5346 | #endif |
| 5347 | |
| 5348 | arg = make_number (iarg); |
| 5349 | } |
| 5350 | |
| 5351 | /* Skip past a partially visible first line. */ |
| 5352 | if (w->vscroll) |
| 5353 | XSETINT (arg, XINT (arg) + 1); |
| 5354 | |
| 5355 | return Fvertical_motion (arg, window); |
| 5356 | } |
| 5357 | |
| 5358 | |
| 5359 | \f |
| 5360 | /*********************************************************************** |
| 5361 | Window Configuration |
| 5362 | ***********************************************************************/ |
| 5363 | |
| 5364 | struct save_window_data |
| 5365 | { |
| 5366 | struct vectorlike_header header; |
| 5367 | Lisp_Object selected_frame; |
| 5368 | Lisp_Object current_window; |
| 5369 | Lisp_Object current_buffer; |
| 5370 | Lisp_Object minibuf_scroll_window; |
| 5371 | Lisp_Object minibuf_selected_window; |
| 5372 | Lisp_Object root_window; |
| 5373 | Lisp_Object focus_frame; |
| 5374 | /* A vector, each of whose elements is a struct saved_window |
| 5375 | for one window. */ |
| 5376 | Lisp_Object saved_windows; |
| 5377 | |
| 5378 | /* All fields above are traced by the GC. |
| 5379 | From `frame-cols' down, the fields are ignored by the GC. */ |
| 5380 | |
| 5381 | int frame_cols, frame_lines, frame_menu_bar_lines; |
| 5382 | int frame_tool_bar_lines; |
| 5383 | }; |
| 5384 | |
| 5385 | /* This is saved as a Lisp_Vector */ |
| 5386 | struct saved_window |
| 5387 | { |
| 5388 | struct vectorlike_header header; |
| 5389 | |
| 5390 | Lisp_Object window, buffer, start, pointm, mark; |
| 5391 | Lisp_Object left_col, top_line, total_cols, total_lines; |
| 5392 | Lisp_Object normal_cols, normal_lines; |
| 5393 | Lisp_Object hscroll, min_hscroll; |
| 5394 | Lisp_Object parent, prev; |
| 5395 | Lisp_Object start_at_line_beg; |
| 5396 | Lisp_Object display_table; |
| 5397 | Lisp_Object left_margin_cols, right_margin_cols; |
| 5398 | Lisp_Object left_fringe_width, right_fringe_width, fringes_outside_margins; |
| 5399 | Lisp_Object scroll_bar_width, vertical_scroll_bar_type, dedicated; |
| 5400 | Lisp_Object combination_limit, window_parameters; |
| 5401 | }; |
| 5402 | |
| 5403 | #define SAVED_WINDOW_N(swv,n) \ |
| 5404 | ((struct saved_window *) (XVECTOR ((swv)->u.contents[(n)]))) |
| 5405 | |
| 5406 | DEFUN ("window-configuration-p", Fwindow_configuration_p, Swindow_configuration_p, 1, 1, 0, |
| 5407 | doc: /* Return t if OBJECT is a window-configuration object. */) |
| 5408 | (Lisp_Object object) |
| 5409 | { |
| 5410 | return WINDOW_CONFIGURATIONP (object) ? Qt : Qnil; |
| 5411 | } |
| 5412 | |
| 5413 | DEFUN ("window-configuration-frame", Fwindow_configuration_frame, Swindow_configuration_frame, 1, 1, 0, |
| 5414 | doc: /* Return the frame that CONFIG, a window-configuration object, is about. */) |
| 5415 | (Lisp_Object config) |
| 5416 | { |
| 5417 | register struct save_window_data *data; |
| 5418 | struct Lisp_Vector *saved_windows; |
| 5419 | |
| 5420 | CHECK_WINDOW_CONFIGURATION (config); |
| 5421 | |
| 5422 | data = (struct save_window_data *) XVECTOR (config); |
| 5423 | saved_windows = XVECTOR (data->saved_windows); |
| 5424 | return XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 5425 | } |
| 5426 | |
| 5427 | DEFUN ("set-window-configuration", Fset_window_configuration, |
| 5428 | Sset_window_configuration, 1, 1, 0, |
| 5429 | doc: /* Set the configuration of windows and buffers as specified by CONFIGURATION. |
| 5430 | CONFIGURATION must be a value previously returned |
| 5431 | by `current-window-configuration' (which see). |
| 5432 | If CONFIGURATION was made from a frame that is now deleted, |
| 5433 | only frame-independent values can be restored. In this case, |
| 5434 | the return value is nil. Otherwise the value is t. */) |
| 5435 | (Lisp_Object configuration) |
| 5436 | { |
| 5437 | register struct save_window_data *data; |
| 5438 | struct Lisp_Vector *saved_windows; |
| 5439 | Lisp_Object new_current_buffer; |
| 5440 | Lisp_Object frame; |
| 5441 | struct frame *f; |
| 5442 | ptrdiff_t old_point = -1; |
| 5443 | |
| 5444 | CHECK_WINDOW_CONFIGURATION (configuration); |
| 5445 | |
| 5446 | data = (struct save_window_data *) XVECTOR (configuration); |
| 5447 | saved_windows = XVECTOR (data->saved_windows); |
| 5448 | |
| 5449 | new_current_buffer = data->current_buffer; |
| 5450 | if (!BUFFER_LIVE_P (XBUFFER (new_current_buffer))) |
| 5451 | new_current_buffer = Qnil; |
| 5452 | else |
| 5453 | { |
| 5454 | if (XBUFFER (new_current_buffer) == current_buffer) |
| 5455 | /* The code further down "preserves point" by saving here PT in |
| 5456 | old_point and then setting it later back into PT. When the |
| 5457 | current-selected-window and the final-selected-window both show |
| 5458 | the current buffer, this suffers from the problem that the |
| 5459 | current PT is the window-point of the current-selected-window, |
| 5460 | while the final PT is the point of the final-selected-window, so |
| 5461 | this copy from one PT to the other would end up moving the |
| 5462 | window-point of the final-selected-window to the window-point of |
| 5463 | the current-selected-window. So we have to be careful which |
| 5464 | point of the current-buffer we copy into old_point. */ |
| 5465 | if (EQ (XWINDOW (data->current_window)->contents, new_current_buffer) |
| 5466 | && WINDOWP (selected_window) |
| 5467 | && EQ (XWINDOW (selected_window)->contents, new_current_buffer) |
| 5468 | && !EQ (selected_window, data->current_window)) |
| 5469 | old_point = marker_position (XWINDOW (data->current_window)->pointm); |
| 5470 | else |
| 5471 | old_point = PT; |
| 5472 | else |
| 5473 | /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of |
| 5474 | point in new_current_buffer as of the last time this buffer was |
| 5475 | used. This can be non-deterministic since it can be changed by |
| 5476 | things like jit-lock by mere temporary selection of some random |
| 5477 | window that happens to show this buffer. |
| 5478 | So if possible we want this arbitrary choice of "which point" to |
| 5479 | be the one from the to-be-selected-window so as to prevent this |
| 5480 | window's cursor from being copied from another window. */ |
| 5481 | if (EQ (XWINDOW (data->current_window)->contents, new_current_buffer) |
| 5482 | /* If current_window = selected_window, its point is in BUF_PT. */ |
| 5483 | && !EQ (selected_window, data->current_window)) |
| 5484 | old_point = marker_position (XWINDOW (data->current_window)->pointm); |
| 5485 | else |
| 5486 | old_point = BUF_PT (XBUFFER (new_current_buffer)); |
| 5487 | } |
| 5488 | |
| 5489 | frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 5490 | f = XFRAME (frame); |
| 5491 | |
| 5492 | /* If f is a dead frame, don't bother rebuilding its window tree. |
| 5493 | However, there is other stuff we should still try to do below. */ |
| 5494 | if (FRAME_LIVE_P (f)) |
| 5495 | { |
| 5496 | Lisp_Object window; |
| 5497 | Lisp_Object dead_windows = Qnil; |
| 5498 | register Lisp_Object tem, par, pers; |
| 5499 | register struct window *w; |
| 5500 | register struct saved_window *p; |
| 5501 | struct window *root_window; |
| 5502 | struct window **leaf_windows; |
| 5503 | int n_leaf_windows; |
| 5504 | ptrdiff_t k; |
| 5505 | int i, n; |
| 5506 | |
| 5507 | /* If the frame has been resized since this window configuration was |
| 5508 | made, we change the frame to the size specified in the |
| 5509 | configuration, restore the configuration, and then resize it |
| 5510 | back. We keep track of the prevailing height in these variables. */ |
| 5511 | int previous_frame_lines = FRAME_LINES (f); |
| 5512 | int previous_frame_cols = FRAME_COLS (f); |
| 5513 | int previous_frame_menu_bar_lines = FRAME_MENU_BAR_LINES (f); |
| 5514 | int previous_frame_tool_bar_lines = FRAME_TOOL_BAR_LINES (f); |
| 5515 | |
| 5516 | /* Don't do this within the main loop below: This may call Lisp |
| 5517 | code and is thus potentially unsafe while input is blocked. */ |
| 5518 | for (k = 0; k < saved_windows->header.size; k++) |
| 5519 | { |
| 5520 | p = SAVED_WINDOW_N (saved_windows, k); |
| 5521 | window = p->window; |
| 5522 | w = XWINDOW (window); |
| 5523 | if (BUFFERP (w->contents) |
| 5524 | && !EQ (w->contents, p->buffer) |
| 5525 | && BUFFER_LIVE_P (XBUFFER (p->buffer))) |
| 5526 | /* If a window we restore gets another buffer, record the |
| 5527 | window's old buffer. */ |
| 5528 | call1 (Qrecord_window_buffer, window); |
| 5529 | } |
| 5530 | |
| 5531 | /* The mouse highlighting code could get screwed up |
| 5532 | if it runs during this. */ |
| 5533 | block_input (); |
| 5534 | |
| 5535 | if (data->frame_lines != previous_frame_lines |
| 5536 | || data->frame_cols != previous_frame_cols) |
| 5537 | change_frame_size (f, data->frame_lines, |
| 5538 | data->frame_cols, 0, 0, 0); |
| 5539 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 5540 | if (data->frame_menu_bar_lines |
| 5541 | != previous_frame_menu_bar_lines) |
| 5542 | x_set_menu_bar_lines (f, make_number (data->frame_menu_bar_lines), |
| 5543 | make_number (0)); |
| 5544 | #ifdef HAVE_WINDOW_SYSTEM |
| 5545 | if (data->frame_tool_bar_lines |
| 5546 | != previous_frame_tool_bar_lines) |
| 5547 | x_set_tool_bar_lines (f, make_number (data->frame_tool_bar_lines), |
| 5548 | make_number (0)); |
| 5549 | #endif |
| 5550 | #endif |
| 5551 | |
| 5552 | /* "Swap out" point from the selected window's buffer |
| 5553 | into the window itself. (Normally the pointm of the selected |
| 5554 | window holds garbage.) We do this now, before |
| 5555 | restoring the window contents, and prevent it from |
| 5556 | being done later on when we select a new window. */ |
| 5557 | if (! NILP (XWINDOW (selected_window)->contents)) |
| 5558 | { |
| 5559 | w = XWINDOW (selected_window); |
| 5560 | set_marker_both (w->pointm, |
| 5561 | w->contents, |
| 5562 | BUF_PT (XBUFFER (w->contents)), |
| 5563 | BUF_PT_BYTE (XBUFFER (w->contents))); |
| 5564 | } |
| 5565 | |
| 5566 | windows_or_buffers_changed++; |
| 5567 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 5568 | |
| 5569 | /* Problem: Freeing all matrices and later allocating them again |
| 5570 | is a serious redisplay flickering problem. What we would |
| 5571 | really like to do is to free only those matrices not reused |
| 5572 | below. */ |
| 5573 | root_window = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 5574 | leaf_windows = alloca (count_windows (root_window) |
| 5575 | * sizeof *leaf_windows); |
| 5576 | n_leaf_windows = get_leaf_windows (root_window, leaf_windows, 0); |
| 5577 | |
| 5578 | /* Kludge Alert! |
| 5579 | Mark all windows now on frame as "deleted". |
| 5580 | Restoring the new configuration "undeletes" any that are in it. |
| 5581 | |
| 5582 | Save their current buffers in their height fields, since we may |
| 5583 | need it later, if a buffer saved in the configuration is now |
| 5584 | dead. */ |
| 5585 | delete_all_child_windows (FRAME_ROOT_WINDOW (f)); |
| 5586 | |
| 5587 | for (k = 0; k < saved_windows->header.size; k++) |
| 5588 | { |
| 5589 | p = SAVED_WINDOW_N (saved_windows, k); |
| 5590 | window = p->window; |
| 5591 | w = XWINDOW (window); |
| 5592 | wset_next (w, Qnil); |
| 5593 | |
| 5594 | if (!NILP (p->parent)) |
| 5595 | wset_parent |
| 5596 | (w, SAVED_WINDOW_N (saved_windows, XFASTINT (p->parent))->window); |
| 5597 | else |
| 5598 | wset_parent (w, Qnil); |
| 5599 | |
| 5600 | if (!NILP (p->prev)) |
| 5601 | { |
| 5602 | wset_prev |
| 5603 | (w, SAVED_WINDOW_N (saved_windows, XFASTINT (p->prev))->window); |
| 5604 | wset_next (XWINDOW (w->prev), p->window); |
| 5605 | } |
| 5606 | else |
| 5607 | { |
| 5608 | wset_prev (w, Qnil); |
| 5609 | if (!NILP (w->parent)) |
| 5610 | wset_combination (XWINDOW (w->parent), |
| 5611 | (XINT (p->total_cols) |
| 5612 | != XWINDOW (w->parent)->total_cols), |
| 5613 | p->window); |
| 5614 | } |
| 5615 | |
| 5616 | /* If we squirreled away the buffer, restore it now. */ |
| 5617 | if (BUFFERP (w->combination_limit)) |
| 5618 | wset_buffer (w, w->combination_limit); |
| 5619 | w->left_col = XFASTINT (p->left_col); |
| 5620 | w->top_line = XFASTINT (p->top_line); |
| 5621 | w->total_cols = XFASTINT (p->total_cols); |
| 5622 | w->total_lines = XFASTINT (p->total_lines); |
| 5623 | wset_normal_cols (w, p->normal_cols); |
| 5624 | wset_normal_lines (w, p->normal_lines); |
| 5625 | w->hscroll = XFASTINT (p->hscroll); |
| 5626 | w->min_hscroll = XFASTINT (p->min_hscroll); |
| 5627 | wset_display_table (w, p->display_table); |
| 5628 | w->left_margin_cols = XINT (p->left_margin_cols); |
| 5629 | w->right_margin_cols = XINT (p->right_margin_cols); |
| 5630 | w->left_fringe_width = XINT (p->left_fringe_width); |
| 5631 | w->right_fringe_width = XINT (p->right_fringe_width); |
| 5632 | w->fringes_outside_margins = !NILP (p->fringes_outside_margins); |
| 5633 | w->scroll_bar_width = XINT (p->scroll_bar_width); |
| 5634 | wset_vertical_scroll_bar_type (w, p->vertical_scroll_bar_type); |
| 5635 | wset_dedicated (w, p->dedicated); |
| 5636 | wset_combination_limit (w, p->combination_limit); |
| 5637 | /* Restore any window parameters that have been saved. |
| 5638 | Parameters that have not been saved are left alone. */ |
| 5639 | for (tem = p->window_parameters; CONSP (tem); tem = XCDR (tem)) |
| 5640 | { |
| 5641 | pers = XCAR (tem); |
| 5642 | if (CONSP (pers)) |
| 5643 | { |
| 5644 | if (NILP (XCDR (pers))) |
| 5645 | { |
| 5646 | par = Fassq (XCAR (pers), w->window_parameters); |
| 5647 | if (CONSP (par) && !NILP (XCDR (par))) |
| 5648 | /* Reset a parameter to nil if and only if it |
| 5649 | has a non-nil association. Don't make new |
| 5650 | associations. */ |
| 5651 | Fsetcdr (par, Qnil); |
| 5652 | } |
| 5653 | else |
| 5654 | /* Always restore a non-nil value. */ |
| 5655 | Fset_window_parameter (window, XCAR (pers), XCDR (pers)); |
| 5656 | } |
| 5657 | } |
| 5658 | |
| 5659 | if (BUFFERP (p->buffer) && BUFFER_LIVE_P (XBUFFER (p->buffer))) |
| 5660 | /* If saved buffer is alive, install it. */ |
| 5661 | { |
| 5662 | wset_buffer (w, p->buffer); |
| 5663 | w->start_at_line_beg = !NILP (p->start_at_line_beg); |
| 5664 | set_marker_restricted (w->start, p->start, w->contents); |
| 5665 | set_marker_restricted (w->pointm, p->pointm, |
| 5666 | w->contents); |
| 5667 | Fset_marker (BVAR (XBUFFER (w->contents), mark), |
| 5668 | p->mark, w->contents); |
| 5669 | |
| 5670 | /* As documented in Fcurrent_window_configuration, don't |
| 5671 | restore the location of point in the buffer which was |
| 5672 | current when the window configuration was recorded. */ |
| 5673 | if (!EQ (p->buffer, new_current_buffer) |
| 5674 | && XBUFFER (p->buffer) == current_buffer) |
| 5675 | Fgoto_char (w->pointm); |
| 5676 | } |
| 5677 | else if (BUFFERP (w->contents) && BUFFER_LIVE_P (XBUFFER (w->contents))) |
| 5678 | /* Keep window's old buffer; make sure the markers are real. */ |
| 5679 | { |
| 5680 | /* Set window markers at start of visible range. */ |
| 5681 | if (XMARKER (w->start)->buffer == 0) |
| 5682 | set_marker_restricted_both (w->start, w->contents, 0, 0); |
| 5683 | if (XMARKER (w->pointm)->buffer == 0) |
| 5684 | set_marker_restricted_both |
| 5685 | (w->pointm, w->contents, |
| 5686 | BUF_PT (XBUFFER (w->contents)), |
| 5687 | BUF_PT_BYTE (XBUFFER (w->contents))); |
| 5688 | w->start_at_line_beg = 1; |
| 5689 | } |
| 5690 | else if (!NILP (w->start)) |
| 5691 | /* Leaf window has no live buffer, get one. */ |
| 5692 | { |
| 5693 | /* Get the buffer via other_buffer_safely in order to |
| 5694 | avoid showing an unimportant buffer and, if necessary, to |
| 5695 | recreate *scratch* in the course (part of Juanma's bs-show |
| 5696 | scenario from March 2011). */ |
| 5697 | wset_buffer (w, other_buffer_safely (Fcurrent_buffer ())); |
| 5698 | /* This will set the markers to beginning of visible |
| 5699 | range. */ |
| 5700 | set_marker_restricted_both (w->start, w->contents, 0, 0); |
| 5701 | set_marker_restricted_both (w->pointm, w->contents, 0, 0); |
| 5702 | w->start_at_line_beg = 1; |
| 5703 | if (!NILP (w->dedicated)) |
| 5704 | /* Record this window as dead. */ |
| 5705 | dead_windows = Fcons (window, dead_windows); |
| 5706 | /* Make sure window is no more dedicated. */ |
| 5707 | wset_dedicated (w, Qnil); |
| 5708 | } |
| 5709 | } |
| 5710 | |
| 5711 | fset_root_window (f, data->root_window); |
| 5712 | /* Arrange *not* to restore point in the buffer that was |
| 5713 | current when the window configuration was saved. */ |
| 5714 | if (EQ (XWINDOW (data->current_window)->contents, new_current_buffer)) |
| 5715 | set_marker_restricted (XWINDOW (data->current_window)->pointm, |
| 5716 | make_number (old_point), |
| 5717 | XWINDOW (data->current_window)->contents); |
| 5718 | |
| 5719 | /* In the following call to `select-window', prevent "swapping out |
| 5720 | point" in the old selected window using the buffer that has |
| 5721 | been restored into it. We already swapped out that point from |
| 5722 | that window's old buffer. */ |
| 5723 | select_window (data->current_window, Qnil, 1); |
| 5724 | BVAR (XBUFFER (XWINDOW (selected_window)->contents), last_selected_window) |
| 5725 | = selected_window; |
| 5726 | |
| 5727 | if (NILP (data->focus_frame) |
| 5728 | || (FRAMEP (data->focus_frame) |
| 5729 | && FRAME_LIVE_P (XFRAME (data->focus_frame)))) |
| 5730 | Fredirect_frame_focus (frame, data->focus_frame); |
| 5731 | |
| 5732 | /* Set the screen height to the value it had before this function. */ |
| 5733 | if (previous_frame_lines != FRAME_LINES (f) |
| 5734 | || previous_frame_cols != FRAME_COLS (f)) |
| 5735 | change_frame_size (f, previous_frame_lines, previous_frame_cols, |
| 5736 | 0, 0, 0); |
| 5737 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 5738 | if (previous_frame_menu_bar_lines != FRAME_MENU_BAR_LINES (f)) |
| 5739 | x_set_menu_bar_lines (f, make_number (previous_frame_menu_bar_lines), |
| 5740 | make_number (0)); |
| 5741 | #ifdef HAVE_WINDOW_SYSTEM |
| 5742 | if (previous_frame_tool_bar_lines != FRAME_TOOL_BAR_LINES (f)) |
| 5743 | x_set_tool_bar_lines (f, make_number (previous_frame_tool_bar_lines), |
| 5744 | make_number (0)); |
| 5745 | #endif |
| 5746 | #endif |
| 5747 | |
| 5748 | /* Now, free glyph matrices in windows that were not reused. */ |
| 5749 | for (i = n = 0; i < n_leaf_windows; ++i) |
| 5750 | { |
| 5751 | if (NILP (leaf_windows[i]->contents)) |
| 5752 | free_window_matrices (leaf_windows[i]); |
| 5753 | else if (EQ (leaf_windows[i]->contents, new_current_buffer)) |
| 5754 | ++n; |
| 5755 | } |
| 5756 | |
| 5757 | adjust_frame_glyphs (f); |
| 5758 | unblock_input (); |
| 5759 | |
| 5760 | /* Scan dead buffer windows. */ |
| 5761 | for (; CONSP (dead_windows); dead_windows = XCDR (dead_windows)) |
| 5762 | { |
| 5763 | window = XCAR (dead_windows); |
| 5764 | if (WINDOW_LIVE_P (window) && !EQ (window, FRAME_ROOT_WINDOW (f))) |
| 5765 | delete_deletable_window (window); |
| 5766 | } |
| 5767 | |
| 5768 | /* Fselect_window will have made f the selected frame, so we |
| 5769 | reselect the proper frame here. Fhandle_switch_frame will change the |
| 5770 | selected window too, but that doesn't make the call to |
| 5771 | Fselect_window above totally superfluous; it still sets f's |
| 5772 | selected window. */ |
| 5773 | if (FRAME_LIVE_P (XFRAME (data->selected_frame))) |
| 5774 | do_switch_frame (data->selected_frame, 0, 0, Qnil); |
| 5775 | |
| 5776 | run_window_configuration_change_hook (f); |
| 5777 | } |
| 5778 | |
| 5779 | if (!NILP (new_current_buffer)) |
| 5780 | { |
| 5781 | Fset_buffer (new_current_buffer); |
| 5782 | /* If the new current buffer doesn't appear in the selected |
| 5783 | window, go to its old point (see bug#12208). */ |
| 5784 | if (!EQ (XWINDOW (data->current_window)->contents, new_current_buffer)) |
| 5785 | Fgoto_char (make_number (old_point)); |
| 5786 | } |
| 5787 | |
| 5788 | Vminibuf_scroll_window = data->minibuf_scroll_window; |
| 5789 | minibuf_selected_window = data->minibuf_selected_window; |
| 5790 | |
| 5791 | return (FRAME_LIVE_P (f) ? Qt : Qnil); |
| 5792 | } |
| 5793 | |
| 5794 | void |
| 5795 | restore_window_configuration (Lisp_Object configuration) |
| 5796 | { |
| 5797 | Fset_window_configuration (configuration); |
| 5798 | } |
| 5799 | |
| 5800 | |
| 5801 | /* If WINDOW is an internal window, recursively delete all child windows |
| 5802 | reachable via the next and contents slots of WINDOW. Otherwise setup |
| 5803 | WINDOW to not show any buffer. */ |
| 5804 | |
| 5805 | void |
| 5806 | delete_all_child_windows (Lisp_Object window) |
| 5807 | { |
| 5808 | register struct window *w; |
| 5809 | |
| 5810 | w = XWINDOW (window); |
| 5811 | |
| 5812 | if (!NILP (w->next)) |
| 5813 | /* Delete WINDOW's siblings (we traverse postorderly). */ |
| 5814 | delete_all_child_windows (w->next); |
| 5815 | |
| 5816 | if (WINDOWP (w->contents)) |
| 5817 | { |
| 5818 | delete_all_child_windows (w->contents); |
| 5819 | wset_combination (w, 0, Qnil); |
| 5820 | } |
| 5821 | else if (BUFFERP (w->contents)) |
| 5822 | { |
| 5823 | unshow_buffer (w); |
| 5824 | unchain_marker (XMARKER (w->pointm)); |
| 5825 | unchain_marker (XMARKER (w->start)); |
| 5826 | /* Since combination limit makes sense for an internal windows |
| 5827 | only, we use this slot to save the buffer for the sake of |
| 5828 | possible resurrection in Fset_window_configuration. */ |
| 5829 | wset_combination_limit (w, w->contents); |
| 5830 | wset_buffer (w, Qnil); |
| 5831 | } |
| 5832 | |
| 5833 | Vwindow_list = Qnil; |
| 5834 | } |
| 5835 | \f |
| 5836 | static int |
| 5837 | count_windows (register struct window *window) |
| 5838 | { |
| 5839 | register int count = 1; |
| 5840 | if (!NILP (window->next)) |
| 5841 | count += count_windows (XWINDOW (window->next)); |
| 5842 | if (WINDOWP (window->contents)) |
| 5843 | count += count_windows (XWINDOW (window->contents)); |
| 5844 | return count; |
| 5845 | } |
| 5846 | |
| 5847 | |
| 5848 | /* Fill vector FLAT with leaf windows under W, starting at index I. |
| 5849 | Value is last index + 1. */ |
| 5850 | static int |
| 5851 | get_leaf_windows (struct window *w, struct window **flat, int i) |
| 5852 | { |
| 5853 | while (w) |
| 5854 | { |
| 5855 | if (WINDOWP (w->contents)) |
| 5856 | i = get_leaf_windows (XWINDOW (w->contents), flat, i); |
| 5857 | else |
| 5858 | flat[i++] = w; |
| 5859 | |
| 5860 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 5861 | } |
| 5862 | |
| 5863 | return i; |
| 5864 | } |
| 5865 | |
| 5866 | |
| 5867 | /* Return a pointer to the glyph W's physical cursor is on. Value is |
| 5868 | null if W's current matrix is invalid, so that no meaningful glyph |
| 5869 | can be returned. */ |
| 5870 | struct glyph * |
| 5871 | get_phys_cursor_glyph (struct window *w) |
| 5872 | { |
| 5873 | struct glyph_row *row; |
| 5874 | struct glyph *glyph; |
| 5875 | int hpos = w->phys_cursor.hpos; |
| 5876 | |
| 5877 | if (!(w->phys_cursor.vpos >= 0 |
| 5878 | && w->phys_cursor.vpos < w->current_matrix->nrows)) |
| 5879 | return NULL; |
| 5880 | |
| 5881 | row = MATRIX_ROW (w->current_matrix, w->phys_cursor.vpos); |
| 5882 | if (!row->enabled_p) |
| 5883 | return NULL; |
| 5884 | |
| 5885 | if (w->hscroll) |
| 5886 | { |
| 5887 | /* When the window is hscrolled, cursor hpos can legitimately be |
| 5888 | out of bounds, but we draw the cursor at the corresponding |
| 5889 | window margin in that case. */ |
| 5890 | if (!row->reversed_p && hpos < 0) |
| 5891 | hpos = 0; |
| 5892 | if (row->reversed_p && hpos >= row->used[TEXT_AREA]) |
| 5893 | hpos = row->used[TEXT_AREA] - 1; |
| 5894 | } |
| 5895 | |
| 5896 | if (0 <= hpos && hpos < row->used[TEXT_AREA]) |
| 5897 | glyph = row->glyphs[TEXT_AREA] + hpos; |
| 5898 | else |
| 5899 | glyph = NULL; |
| 5900 | |
| 5901 | return glyph; |
| 5902 | } |
| 5903 | |
| 5904 | |
| 5905 | static int |
| 5906 | save_window_save (Lisp_Object window, struct Lisp_Vector *vector, int i) |
| 5907 | { |
| 5908 | register struct saved_window *p; |
| 5909 | register struct window *w; |
| 5910 | register Lisp_Object tem, pers, par; |
| 5911 | |
| 5912 | for (; !NILP (window); window = w->next) |
| 5913 | { |
| 5914 | p = SAVED_WINDOW_N (vector, i); |
| 5915 | w = XWINDOW (window); |
| 5916 | |
| 5917 | wset_temslot (w, make_number (i)); i++; |
| 5918 | p->window = window; |
| 5919 | p->buffer = (WINDOW_LEAF_P (w) ? w->contents : Qnil); |
| 5920 | p->left_col = make_number (w->left_col); |
| 5921 | p->top_line = make_number (w->top_line); |
| 5922 | p->total_cols = make_number (w->total_cols); |
| 5923 | p->total_lines = make_number (w->total_lines); |
| 5924 | p->normal_cols = w->normal_cols; |
| 5925 | p->normal_lines = w->normal_lines; |
| 5926 | XSETFASTINT (p->hscroll, w->hscroll); |
| 5927 | XSETFASTINT (p->min_hscroll, w->min_hscroll); |
| 5928 | p->display_table = w->display_table; |
| 5929 | p->left_margin_cols = make_number (w->left_margin_cols); |
| 5930 | p->right_margin_cols = make_number (w->right_margin_cols); |
| 5931 | p->left_fringe_width = make_number (w->left_fringe_width); |
| 5932 | p->right_fringe_width = make_number (w->right_fringe_width); |
| 5933 | p->fringes_outside_margins = w->fringes_outside_margins ? Qt : Qnil; |
| 5934 | p->scroll_bar_width = make_number (w->scroll_bar_width); |
| 5935 | p->vertical_scroll_bar_type = w->vertical_scroll_bar_type; |
| 5936 | p->dedicated = w->dedicated; |
| 5937 | p->combination_limit = w->combination_limit; |
| 5938 | p->window_parameters = Qnil; |
| 5939 | |
| 5940 | if (!NILP (Vwindow_persistent_parameters)) |
| 5941 | { |
| 5942 | /* Run cycle detection on Vwindow_persistent_parameters. */ |
| 5943 | Lisp_Object tortoise, hare; |
| 5944 | |
| 5945 | hare = tortoise = Vwindow_persistent_parameters; |
| 5946 | while (CONSP (hare)) |
| 5947 | { |
| 5948 | hare = XCDR (hare); |
| 5949 | if (!CONSP (hare)) |
| 5950 | break; |
| 5951 | |
| 5952 | hare = XCDR (hare); |
| 5953 | tortoise = XCDR (tortoise); |
| 5954 | |
| 5955 | if (EQ (hare, tortoise)) |
| 5956 | /* Reset Vwindow_persistent_parameters to Qnil. */ |
| 5957 | { |
| 5958 | Vwindow_persistent_parameters = Qnil; |
| 5959 | break; |
| 5960 | } |
| 5961 | } |
| 5962 | |
| 5963 | for (tem = Vwindow_persistent_parameters; CONSP (tem); |
| 5964 | tem = XCDR (tem)) |
| 5965 | { |
| 5966 | pers = XCAR (tem); |
| 5967 | /* Save values for persistent window parameters. */ |
| 5968 | if (CONSP (pers) && !NILP (XCDR (pers))) |
| 5969 | { |
| 5970 | par = Fassq (XCAR (pers), w->window_parameters); |
| 5971 | if (NILP (par)) |
| 5972 | /* If the window has no value for the parameter, |
| 5973 | make one. */ |
| 5974 | p->window_parameters = Fcons (Fcons (XCAR (pers), Qnil), |
| 5975 | p->window_parameters); |
| 5976 | else |
| 5977 | /* If the window has a value for the parameter, |
| 5978 | save it. */ |
| 5979 | p->window_parameters = Fcons (Fcons (XCAR (par), |
| 5980 | XCDR (par)), |
| 5981 | p->window_parameters); |
| 5982 | } |
| 5983 | } |
| 5984 | } |
| 5985 | |
| 5986 | if (BUFFERP (w->contents)) |
| 5987 | { |
| 5988 | /* Save w's value of point in the window configuration. If w |
| 5989 | is the selected window, then get the value of point from |
| 5990 | the buffer; pointm is garbage in the selected window. */ |
| 5991 | if (EQ (window, selected_window)) |
| 5992 | p->pointm = build_marker (XBUFFER (w->contents), |
| 5993 | BUF_PT (XBUFFER (w->contents)), |
| 5994 | BUF_PT_BYTE (XBUFFER (w->contents))); |
| 5995 | else |
| 5996 | p->pointm = Fcopy_marker (w->pointm, Qnil); |
| 5997 | XMARKER (p->pointm)->insertion_type |
| 5998 | = !NILP (Vwindow_point_insertion_type); |
| 5999 | |
| 6000 | p->start = Fcopy_marker (w->start, Qnil); |
| 6001 | p->start_at_line_beg = w->start_at_line_beg ? Qt : Qnil; |
| 6002 | |
| 6003 | tem = BVAR (XBUFFER (w->contents), mark); |
| 6004 | p->mark = Fcopy_marker (tem, Qnil); |
| 6005 | } |
| 6006 | else |
| 6007 | { |
| 6008 | p->pointm = Qnil; |
| 6009 | p->start = Qnil; |
| 6010 | p->mark = Qnil; |
| 6011 | p->start_at_line_beg = Qnil; |
| 6012 | } |
| 6013 | |
| 6014 | if (NILP (w->parent)) |
| 6015 | p->parent = Qnil; |
| 6016 | else |
| 6017 | p->parent = XWINDOW (w->parent)->temslot; |
| 6018 | |
| 6019 | if (NILP (w->prev)) |
| 6020 | p->prev = Qnil; |
| 6021 | else |
| 6022 | p->prev = XWINDOW (w->prev)->temslot; |
| 6023 | |
| 6024 | if (WINDOWP (w->contents)) |
| 6025 | i = save_window_save (w->contents, vector, i); |
| 6026 | } |
| 6027 | |
| 6028 | return i; |
| 6029 | } |
| 6030 | |
| 6031 | DEFUN ("current-window-configuration", Fcurrent_window_configuration, |
| 6032 | Scurrent_window_configuration, 0, 1, 0, |
| 6033 | doc: /* Return an object representing the current window configuration of FRAME. |
| 6034 | If FRAME is nil or omitted, use the selected frame. |
| 6035 | This describes the number of windows, their sizes and current buffers, |
| 6036 | and for each displayed buffer, where display starts, and the positions of |
| 6037 | point and mark. An exception is made for point in the current buffer: |
| 6038 | its value is -not- saved. |
| 6039 | This also records the currently selected frame, and FRAME's focus |
| 6040 | redirection (see `redirect-frame-focus'). The variable |
| 6041 | `window-persistent-parameters' specifies which window parameters are |
| 6042 | saved by this function. */) |
| 6043 | (Lisp_Object frame) |
| 6044 | { |
| 6045 | register Lisp_Object tem; |
| 6046 | register int n_windows; |
| 6047 | register struct save_window_data *data; |
| 6048 | register int i; |
| 6049 | struct frame *f = decode_live_frame (frame); |
| 6050 | |
| 6051 | n_windows = count_windows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 6052 | data = ALLOCATE_PSEUDOVECTOR (struct save_window_data, frame_cols, |
| 6053 | PVEC_WINDOW_CONFIGURATION); |
| 6054 | |
| 6055 | data->frame_cols = FRAME_COLS (f); |
| 6056 | data->frame_lines = FRAME_LINES (f); |
| 6057 | data->frame_menu_bar_lines = FRAME_MENU_BAR_LINES (f); |
| 6058 | data->frame_tool_bar_lines = FRAME_TOOL_BAR_LINES (f); |
| 6059 | data->selected_frame = selected_frame; |
| 6060 | data->current_window = FRAME_SELECTED_WINDOW (f); |
| 6061 | XSETBUFFER (data->current_buffer, current_buffer); |
| 6062 | data->minibuf_scroll_window = minibuf_level > 0 ? Vminibuf_scroll_window : Qnil; |
| 6063 | data->minibuf_selected_window = minibuf_level > 0 ? minibuf_selected_window : Qnil; |
| 6064 | data->root_window = FRAME_ROOT_WINDOW (f); |
| 6065 | data->focus_frame = FRAME_FOCUS_FRAME (f); |
| 6066 | tem = make_uninit_vector (n_windows); |
| 6067 | data->saved_windows = tem; |
| 6068 | for (i = 0; i < n_windows; i++) |
| 6069 | ASET (tem, i, |
| 6070 | Fmake_vector (make_number (VECSIZE (struct saved_window)), Qnil)); |
| 6071 | save_window_save (FRAME_ROOT_WINDOW (f), XVECTOR (tem), 0); |
| 6072 | XSETWINDOW_CONFIGURATION (tem, data); |
| 6073 | return (tem); |
| 6074 | } |
| 6075 | |
| 6076 | /* Called after W's margins, fringes or scroll bars was adjusted. */ |
| 6077 | |
| 6078 | static void |
| 6079 | apply_window_adjustment (struct window *w) |
| 6080 | { |
| 6081 | eassert (w); |
| 6082 | adjust_window_margins (w); |
| 6083 | clear_glyph_matrix (w->current_matrix); |
| 6084 | w->window_end_valid = 0; |
| 6085 | windows_or_buffers_changed++; |
| 6086 | adjust_frame_glyphs (XFRAME (WINDOW_FRAME (w))); |
| 6087 | } |
| 6088 | |
| 6089 | \f |
| 6090 | /*********************************************************************** |
| 6091 | Marginal Areas |
| 6092 | ***********************************************************************/ |
| 6093 | |
| 6094 | static struct window * |
| 6095 | set_window_margins (struct window *w, Lisp_Object left_width, |
| 6096 | Lisp_Object right_width) |
| 6097 | { |
| 6098 | int left, right; |
| 6099 | |
| 6100 | /* FIXME: what about margins that are too wide? */ |
| 6101 | left = (NILP (left_width) ? 0 |
| 6102 | : (CHECK_NATNUM (left_width), XINT (left_width))); |
| 6103 | right = (NILP (right_width) ? 0 |
| 6104 | : (CHECK_NATNUM (right_width), XINT (right_width))); |
| 6105 | |
| 6106 | if (w->left_margin_cols != left || w->right_margin_cols != right) |
| 6107 | { |
| 6108 | w->left_margin_cols = left; |
| 6109 | w->right_margin_cols = right; |
| 6110 | return w; |
| 6111 | } |
| 6112 | return NULL; |
| 6113 | } |
| 6114 | |
| 6115 | DEFUN ("set-window-margins", Fset_window_margins, Sset_window_margins, |
| 6116 | 2, 3, 0, |
| 6117 | doc: /* Set width of marginal areas of window WINDOW. |
| 6118 | WINDOW must be a live window and defaults to the selected one. |
| 6119 | |
| 6120 | Second arg LEFT-WIDTH specifies the number of character cells to |
| 6121 | reserve for the left marginal area. Optional third arg RIGHT-WIDTH |
| 6122 | does the same for the right marginal area. A nil width parameter |
| 6123 | means no margin. |
| 6124 | |
| 6125 | Return t if any margin was actually changed and nil otherwise. */) |
| 6126 | (Lisp_Object window, Lisp_Object left_width, Lisp_Object right_width) |
| 6127 | { |
| 6128 | struct window *w = set_window_margins (decode_live_window (window), |
| 6129 | left_width, right_width); |
| 6130 | return w ? (apply_window_adjustment (w), Qt) : Qnil; |
| 6131 | } |
| 6132 | |
| 6133 | |
| 6134 | DEFUN ("window-margins", Fwindow_margins, Swindow_margins, |
| 6135 | 0, 1, 0, |
| 6136 | doc: /* Get width of marginal areas of window WINDOW. |
| 6137 | WINDOW must be a live window and defaults to the selected one. |
| 6138 | |
| 6139 | Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH). |
| 6140 | If a marginal area does not exist, its width will be returned |
| 6141 | as nil. */) |
| 6142 | (Lisp_Object window) |
| 6143 | { |
| 6144 | struct window *w = decode_live_window (window); |
| 6145 | return Fcons (w->left_margin_cols ? make_number (w->left_margin_cols) : Qnil, |
| 6146 | w->right_margin_cols ? make_number (w->right_margin_cols) : Qnil); |
| 6147 | } |
| 6148 | |
| 6149 | |
| 6150 | \f |
| 6151 | /*********************************************************************** |
| 6152 | Fringes |
| 6153 | ***********************************************************************/ |
| 6154 | |
| 6155 | static struct window * |
| 6156 | set_window_fringes (struct window *w, Lisp_Object left_width, |
| 6157 | Lisp_Object right_width, Lisp_Object outside_margins) |
| 6158 | { |
| 6159 | int left, right, outside = !NILP (outside_margins); |
| 6160 | |
| 6161 | left = (NILP (left_width) ? -1 |
| 6162 | : (CHECK_NATNUM (left_width), XINT (left_width))); |
| 6163 | right = (NILP (right_width) ? -1 |
| 6164 | : (CHECK_NATNUM (right_width), XINT (right_width))); |
| 6165 | |
| 6166 | /* Do nothing on a tty or if nothing to actually change. */ |
| 6167 | if (FRAME_WINDOW_P (WINDOW_XFRAME (w)) |
| 6168 | && (w->left_fringe_width != left |
| 6169 | || w->right_fringe_width != right |
| 6170 | || w->fringes_outside_margins != outside)) |
| 6171 | { |
| 6172 | w->left_fringe_width = left; |
| 6173 | w->right_fringe_width = right; |
| 6174 | w->fringes_outside_margins = outside; |
| 6175 | return w; |
| 6176 | } |
| 6177 | return NULL; |
| 6178 | } |
| 6179 | |
| 6180 | DEFUN ("set-window-fringes", Fset_window_fringes, Sset_window_fringes, |
| 6181 | 2, 4, 0, |
| 6182 | doc: /* Set the fringe widths of window WINDOW. |
| 6183 | WINDOW must be a live window and defaults to the selected one. |
| 6184 | |
| 6185 | Second arg LEFT-WIDTH specifies the number of pixels to reserve for |
| 6186 | the left fringe. Optional third arg RIGHT-WIDTH specifies the right |
| 6187 | fringe width. If a fringe width arg is nil, that means to use the |
| 6188 | frame's default fringe width. Default fringe widths can be set with |
| 6189 | the command `set-fringe-style'. |
| 6190 | If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes |
| 6191 | outside of the display margins. By default, fringes are drawn between |
| 6192 | display marginal areas and the text area. |
| 6193 | |
| 6194 | Return t if any fringe was actually changed and nil otherwise. */) |
| 6195 | (Lisp_Object window, Lisp_Object left_width, |
| 6196 | Lisp_Object right_width, Lisp_Object outside_margins) |
| 6197 | { |
| 6198 | struct window *w |
| 6199 | = set_window_fringes (decode_live_window (window), |
| 6200 | left_width, right_width, outside_margins); |
| 6201 | return w ? (apply_window_adjustment (w), Qt) : Qnil; |
| 6202 | } |
| 6203 | |
| 6204 | |
| 6205 | DEFUN ("window-fringes", Fwindow_fringes, Swindow_fringes, |
| 6206 | 0, 1, 0, |
| 6207 | doc: /* Get width of fringes of window WINDOW. |
| 6208 | WINDOW must be a live window and defaults to the selected one. |
| 6209 | |
| 6210 | Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */) |
| 6211 | (Lisp_Object window) |
| 6212 | { |
| 6213 | struct window *w = decode_live_window (window); |
| 6214 | |
| 6215 | return list3 (make_number (WINDOW_LEFT_FRINGE_WIDTH (w)), |
| 6216 | make_number (WINDOW_RIGHT_FRINGE_WIDTH (w)), |
| 6217 | WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) ? Qt : Qnil); |
| 6218 | } |
| 6219 | |
| 6220 | |
| 6221 | \f |
| 6222 | /*********************************************************************** |
| 6223 | Scroll bars |
| 6224 | ***********************************************************************/ |
| 6225 | |
| 6226 | static struct window * |
| 6227 | set_window_scroll_bars (struct window *w, Lisp_Object width, |
| 6228 | Lisp_Object vertical_type, Lisp_Object horizontal_type) |
| 6229 | { |
| 6230 | int iwidth = (NILP (width) ? -1 : (CHECK_NATNUM (width), XINT (width))); |
| 6231 | |
| 6232 | if (iwidth == 0) |
| 6233 | vertical_type = Qnil; |
| 6234 | |
| 6235 | if (!(NILP (vertical_type) |
| 6236 | || EQ (vertical_type, Qleft) |
| 6237 | || EQ (vertical_type, Qright) |
| 6238 | || EQ (vertical_type, Qt))) |
| 6239 | error ("Invalid type of vertical scroll bar"); |
| 6240 | |
| 6241 | if (w->scroll_bar_width != iwidth |
| 6242 | || !EQ (w->vertical_scroll_bar_type, vertical_type)) |
| 6243 | { |
| 6244 | w->scroll_bar_width = iwidth; |
| 6245 | wset_vertical_scroll_bar_type (w, vertical_type); |
| 6246 | return w; |
| 6247 | } |
| 6248 | return NULL; |
| 6249 | } |
| 6250 | |
| 6251 | DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars, |
| 6252 | Sset_window_scroll_bars, 2, 4, 0, |
| 6253 | doc: /* Set width and type of scroll bars of window WINDOW. |
| 6254 | WINDOW must be a live window and defaults to the selected one. |
| 6255 | |
| 6256 | Second parameter WIDTH specifies the pixel width for the scroll bar; |
| 6257 | this is automatically adjusted to a multiple of the frame column width. |
| 6258 | Third parameter VERTICAL-TYPE specifies the type of the vertical scroll |
| 6259 | bar: left, right, or nil. |
| 6260 | If WIDTH is nil, use the frame's scroll-bar width. |
| 6261 | If VERTICAL-TYPE is t, use the frame's scroll-bar type. |
| 6262 | Fourth parameter HORIZONTAL-TYPE is currently unused. |
| 6263 | |
| 6264 | Return t if scroll bars was actually changed and nil otherwise. */) |
| 6265 | (Lisp_Object window, Lisp_Object width, |
| 6266 | Lisp_Object vertical_type, Lisp_Object horizontal_type) |
| 6267 | { |
| 6268 | struct window *w |
| 6269 | = set_window_scroll_bars (decode_live_window (window), |
| 6270 | width, vertical_type, horizontal_type); |
| 6271 | return w ? (apply_window_adjustment (w), Qt) : Qnil; |
| 6272 | } |
| 6273 | |
| 6274 | |
| 6275 | DEFUN ("window-scroll-bars", Fwindow_scroll_bars, Swindow_scroll_bars, |
| 6276 | 0, 1, 0, |
| 6277 | doc: /* Get width and type of scroll bars of window WINDOW. |
| 6278 | WINDOW must be a live window and defaults to the selected one. |
| 6279 | |
| 6280 | Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE). |
| 6281 | If WIDTH is nil or TYPE is t, the window is using the frame's corresponding |
| 6282 | value. */) |
| 6283 | (Lisp_Object window) |
| 6284 | { |
| 6285 | struct window *w = decode_live_window (window); |
| 6286 | |
| 6287 | return list4 (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w) |
| 6288 | ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w) |
| 6289 | : WINDOW_SCROLL_BAR_AREA_WIDTH (w))), |
| 6290 | make_number (WINDOW_SCROLL_BAR_COLS (w)), |
| 6291 | w->vertical_scroll_bar_type, Qnil); |
| 6292 | } |
| 6293 | |
| 6294 | |
| 6295 | \f |
| 6296 | /*********************************************************************** |
| 6297 | Smooth scrolling |
| 6298 | ***********************************************************************/ |
| 6299 | |
| 6300 | DEFUN ("window-vscroll", Fwindow_vscroll, Swindow_vscroll, 0, 2, 0, |
| 6301 | doc: /* Return the amount by which WINDOW is scrolled vertically. |
| 6302 | If WINDOW is omitted or nil, it defaults to the selected window. |
| 6303 | Normally, value is a multiple of the canonical character height of WINDOW; |
| 6304 | optional second arg PIXELS-P means value is measured in pixels. */) |
| 6305 | (Lisp_Object window, Lisp_Object pixels_p) |
| 6306 | { |
| 6307 | Lisp_Object result; |
| 6308 | struct window *w = decode_live_window (window); |
| 6309 | struct frame *f = XFRAME (w->frame); |
| 6310 | |
| 6311 | if (FRAME_WINDOW_P (f)) |
| 6312 | result = (NILP (pixels_p) |
| 6313 | ? FRAME_CANON_Y_FROM_PIXEL_Y (f, -w->vscroll) |
| 6314 | : make_number (-w->vscroll)); |
| 6315 | else |
| 6316 | result = make_number (0); |
| 6317 | return result; |
| 6318 | } |
| 6319 | |
| 6320 | |
| 6321 | DEFUN ("set-window-vscroll", Fset_window_vscroll, Sset_window_vscroll, |
| 6322 | 2, 3, 0, |
| 6323 | doc: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL. |
| 6324 | WINDOW nil means use the selected window. Normally, VSCROLL is a |
| 6325 | non-negative multiple of the canonical character height of WINDOW; |
| 6326 | optional third arg PIXELS-P non-nil means that VSCROLL is in pixels. |
| 6327 | If PIXELS-P is nil, VSCROLL may have to be rounded so that it |
| 6328 | corresponds to an integral number of pixels. The return value is the |
| 6329 | result of this rounding. |
| 6330 | If PIXELS-P is non-nil, the return value is VSCROLL. */) |
| 6331 | (Lisp_Object window, Lisp_Object vscroll, Lisp_Object pixels_p) |
| 6332 | { |
| 6333 | struct window *w = decode_live_window (window); |
| 6334 | struct frame *f = XFRAME (w->frame); |
| 6335 | |
| 6336 | CHECK_NUMBER_OR_FLOAT (vscroll); |
| 6337 | |
| 6338 | if (FRAME_WINDOW_P (f)) |
| 6339 | { |
| 6340 | int old_dy = w->vscroll; |
| 6341 | |
| 6342 | w->vscroll = - (NILP (pixels_p) |
| 6343 | ? FRAME_LINE_HEIGHT (f) * XFLOATINT (vscroll) |
| 6344 | : XFLOATINT (vscroll)); |
| 6345 | w->vscroll = min (w->vscroll, 0); |
| 6346 | |
| 6347 | if (w->vscroll != old_dy) |
| 6348 | { |
| 6349 | /* Adjust glyph matrix of the frame if the virtual display |
| 6350 | area becomes larger than before. */ |
| 6351 | if (w->vscroll < 0 && w->vscroll < old_dy) |
| 6352 | adjust_frame_glyphs (f); |
| 6353 | |
| 6354 | /* Prevent redisplay shortcuts. */ |
| 6355 | XBUFFER (w->contents)->prevent_redisplay_optimizations_p = 1; |
| 6356 | } |
| 6357 | } |
| 6358 | |
| 6359 | return Fwindow_vscroll (window, pixels_p); |
| 6360 | } |
| 6361 | |
| 6362 | \f |
| 6363 | /* Call FN for all leaf windows on frame F. FN is called with the |
| 6364 | first argument being a pointer to the leaf window, and with |
| 6365 | additional argument USER_DATA. Stops when FN returns 0. */ |
| 6366 | |
| 6367 | static void |
| 6368 | foreach_window (struct frame *f, int (*fn) (struct window *, void *), |
| 6369 | void *user_data) |
| 6370 | { |
| 6371 | /* delete_frame may set FRAME_ROOT_WINDOW (f) to Qnil. */ |
| 6372 | if (WINDOWP (FRAME_ROOT_WINDOW (f))) |
| 6373 | foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f)), fn, user_data); |
| 6374 | } |
| 6375 | |
| 6376 | |
| 6377 | /* Helper function for foreach_window. Call FN for all leaf windows |
| 6378 | reachable from W. FN is called with the first argument being a |
| 6379 | pointer to the leaf window, and with additional argument USER_DATA. |
| 6380 | Stop when FN returns 0. Value is 0 if stopped by FN. */ |
| 6381 | |
| 6382 | static int |
| 6383 | foreach_window_1 (struct window *w, int (*fn) (struct window *, void *), void *user_data) |
| 6384 | { |
| 6385 | int cont; |
| 6386 | |
| 6387 | for (cont = 1; w && cont;) |
| 6388 | { |
| 6389 | if (WINDOWP (w->contents)) |
| 6390 | cont = foreach_window_1 (XWINDOW (w->contents), fn, user_data); |
| 6391 | else |
| 6392 | cont = fn (w, user_data); |
| 6393 | |
| 6394 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 6395 | } |
| 6396 | |
| 6397 | return cont; |
| 6398 | } |
| 6399 | |
| 6400 | /*********************************************************************** |
| 6401 | Initialization |
| 6402 | ***********************************************************************/ |
| 6403 | |
| 6404 | /* Return 1 if window configurations CONFIGURATION1 and CONFIGURATION2 |
| 6405 | describe the same state of affairs. This is used by Fequal. |
| 6406 | |
| 6407 | IGNORE_POSITIONS means ignore non-matching scroll positions |
| 6408 | and the like. |
| 6409 | |
| 6410 | This ignores a couple of things like the dedication status of |
| 6411 | window, combination_limit and the like. This might have to be |
| 6412 | fixed. */ |
| 6413 | |
| 6414 | bool |
| 6415 | compare_window_configurations (Lisp_Object configuration1, |
| 6416 | Lisp_Object configuration2, |
| 6417 | bool ignore_positions) |
| 6418 | { |
| 6419 | register struct save_window_data *d1, *d2; |
| 6420 | struct Lisp_Vector *sws1, *sws2; |
| 6421 | ptrdiff_t i; |
| 6422 | |
| 6423 | CHECK_WINDOW_CONFIGURATION (configuration1); |
| 6424 | CHECK_WINDOW_CONFIGURATION (configuration2); |
| 6425 | |
| 6426 | d1 = (struct save_window_data *) XVECTOR (configuration1); |
| 6427 | d2 = (struct save_window_data *) XVECTOR (configuration2); |
| 6428 | sws1 = XVECTOR (d1->saved_windows); |
| 6429 | sws2 = XVECTOR (d2->saved_windows); |
| 6430 | |
| 6431 | /* Frame settings must match. */ |
| 6432 | if (d1->frame_cols != d2->frame_cols |
| 6433 | || d1->frame_lines != d2->frame_lines |
| 6434 | || d1->frame_menu_bar_lines != d2->frame_menu_bar_lines |
| 6435 | || !EQ (d1->selected_frame, d2->selected_frame) |
| 6436 | || !EQ (d1->current_buffer, d2->current_buffer) |
| 6437 | || (!ignore_positions |
| 6438 | && (!EQ (d1->minibuf_scroll_window, d2->minibuf_scroll_window) |
| 6439 | || !EQ (d1->minibuf_selected_window, d2->minibuf_selected_window))) |
| 6440 | || !EQ (d1->focus_frame, d2->focus_frame) |
| 6441 | /* Verify that the two configurations have the same number of windows. */ |
| 6442 | || sws1->header.size != sws2->header.size) |
| 6443 | return 0; |
| 6444 | |
| 6445 | for (i = 0; i < sws1->header.size; i++) |
| 6446 | { |
| 6447 | struct saved_window *sw1, *sw2; |
| 6448 | |
| 6449 | sw1 = SAVED_WINDOW_N (sws1, i); |
| 6450 | sw2 = SAVED_WINDOW_N (sws2, i); |
| 6451 | |
| 6452 | if ( |
| 6453 | /* The "current" windows in the two configurations must |
| 6454 | correspond to each other. */ |
| 6455 | EQ (d1->current_window, sw1->window) |
| 6456 | != EQ (d2->current_window, sw2->window) |
| 6457 | /* Windows' buffers must match. */ |
| 6458 | || !EQ (sw1->buffer, sw2->buffer) |
| 6459 | || !EQ (sw1->left_col, sw2->left_col) |
| 6460 | || !EQ (sw1->top_line, sw2->top_line) |
| 6461 | || !EQ (sw1->total_cols, sw2->total_cols) |
| 6462 | || !EQ (sw1->total_lines, sw2->total_lines) |
| 6463 | || !EQ (sw1->display_table, sw2->display_table) |
| 6464 | /* The next two disjuncts check the window structure for |
| 6465 | equality. */ |
| 6466 | || !EQ (sw1->parent, sw2->parent) |
| 6467 | || !EQ (sw1->prev, sw2->prev) |
| 6468 | || (!ignore_positions |
| 6469 | && (!EQ (sw1->hscroll, sw2->hscroll) |
| 6470 | || !EQ (sw1->min_hscroll, sw2->min_hscroll) |
| 6471 | || !EQ (sw1->start_at_line_beg, sw2->start_at_line_beg) |
| 6472 | || NILP (Fequal (sw1->start, sw2->start)) |
| 6473 | || NILP (Fequal (sw1->pointm, sw2->pointm)) |
| 6474 | || NILP (Fequal (sw1->mark, sw2->mark)))) |
| 6475 | || !EQ (sw1->left_margin_cols, sw2->left_margin_cols) |
| 6476 | || !EQ (sw1->right_margin_cols, sw2->right_margin_cols) |
| 6477 | || !EQ (sw1->left_fringe_width, sw2->left_fringe_width) |
| 6478 | || !EQ (sw1->right_fringe_width, sw2->right_fringe_width) |
| 6479 | || !EQ (sw1->fringes_outside_margins, sw2->fringes_outside_margins) |
| 6480 | || !EQ (sw1->scroll_bar_width, sw2->scroll_bar_width) |
| 6481 | || !EQ (sw1->vertical_scroll_bar_type, sw2->vertical_scroll_bar_type)) |
| 6482 | return 0; |
| 6483 | } |
| 6484 | |
| 6485 | return 1; |
| 6486 | } |
| 6487 | |
| 6488 | DEFUN ("compare-window-configurations", Fcompare_window_configurations, |
| 6489 | Scompare_window_configurations, 2, 2, 0, |
| 6490 | doc: /* Compare two window configurations as regards the structure of windows. |
| 6491 | This function ignores details such as the values of point and mark |
| 6492 | and scrolling positions. */) |
| 6493 | (Lisp_Object x, Lisp_Object y) |
| 6494 | { |
| 6495 | if (compare_window_configurations (x, y, 1)) |
| 6496 | return Qt; |
| 6497 | return Qnil; |
| 6498 | } |
| 6499 | \f |
| 6500 | void |
| 6501 | init_window_once (void) |
| 6502 | { |
| 6503 | struct frame *f = make_initial_frame (); |
| 6504 | XSETFRAME (selected_frame, f); |
| 6505 | Vterminal_frame = selected_frame; |
| 6506 | minibuf_window = f->minibuffer_window; |
| 6507 | selected_window = f->selected_window; |
| 6508 | |
| 6509 | window_initialized = 1; |
| 6510 | } |
| 6511 | |
| 6512 | void |
| 6513 | init_window (void) |
| 6514 | { |
| 6515 | Vwindow_list = Qnil; |
| 6516 | } |
| 6517 | |
| 6518 | void |
| 6519 | syms_of_window (void) |
| 6520 | { |
| 6521 | DEFSYM (Qscroll_up, "scroll-up"); |
| 6522 | DEFSYM (Qscroll_down, "scroll-down"); |
| 6523 | DEFSYM (Qscroll_command, "scroll-command"); |
| 6524 | |
| 6525 | Fput (Qscroll_up, Qscroll_command, Qt); |
| 6526 | Fput (Qscroll_down, Qscroll_command, Qt); |
| 6527 | |
| 6528 | DEFSYM (Qwindow_configuration_change_hook, "window-configuration-change-hook"); |
| 6529 | DEFSYM (Qwindowp, "windowp"); |
| 6530 | DEFSYM (Qwindow_configuration_p, "window-configuration-p"); |
| 6531 | DEFSYM (Qwindow_live_p, "window-live-p"); |
| 6532 | DEFSYM (Qwindow_valid_p, "window-valid-p"); |
| 6533 | DEFSYM (Qwindow_deletable_p, "window-deletable-p"); |
| 6534 | DEFSYM (Qdelete_window, "delete-window"); |
| 6535 | DEFSYM (Qwindow_resize_root_window, "window--resize-root-window"); |
| 6536 | DEFSYM (Qwindow_resize_root_window_vertically, "window--resize-root-window-vertically"); |
| 6537 | DEFSYM (Qsafe, "safe"); |
| 6538 | DEFSYM (Qdisplay_buffer, "display-buffer"); |
| 6539 | DEFSYM (Qreplace_buffer_in_windows, "replace-buffer-in-windows"); |
| 6540 | DEFSYM (Qrecord_window_buffer, "record-window-buffer"); |
| 6541 | DEFSYM (Qget_mru_window, "get-mru-window"); |
| 6542 | DEFSYM (Qwindow_size, "window-size"); |
| 6543 | DEFSYM (Qtemp_buffer_show_hook, "temp-buffer-show-hook"); |
| 6544 | DEFSYM (Qabove, "above"); |
| 6545 | DEFSYM (Qbelow, "below"); |
| 6546 | DEFSYM (Qclone_of, "clone-of"); |
| 6547 | |
| 6548 | staticpro (&Vwindow_list); |
| 6549 | |
| 6550 | minibuf_selected_window = Qnil; |
| 6551 | staticpro (&minibuf_selected_window); |
| 6552 | |
| 6553 | window_scroll_pixel_based_preserve_x = -1; |
| 6554 | window_scroll_pixel_based_preserve_y = -1; |
| 6555 | window_scroll_preserve_hpos = -1; |
| 6556 | window_scroll_preserve_vpos = -1; |
| 6557 | |
| 6558 | DEFVAR_LISP ("temp-buffer-show-function", Vtemp_buffer_show_function, |
| 6559 | doc: /* Non-nil means call as function to display a help buffer. |
| 6560 | The function is called with one argument, the buffer to be displayed. |
| 6561 | Used by `with-output-to-temp-buffer'. |
| 6562 | If this function is used, then it must do the entire job of showing |
| 6563 | the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */); |
| 6564 | Vtemp_buffer_show_function = Qnil; |
| 6565 | |
| 6566 | DEFVAR_LISP ("minibuffer-scroll-window", Vminibuf_scroll_window, |
| 6567 | doc: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */); |
| 6568 | Vminibuf_scroll_window = Qnil; |
| 6569 | |
| 6570 | DEFVAR_BOOL ("mode-line-in-non-selected-windows", mode_line_in_non_selected_windows, |
| 6571 | doc: /* Non-nil means to use `mode-line-inactive' face in non-selected windows. |
| 6572 | If the minibuffer is active, the `minibuffer-scroll-window' mode line |
| 6573 | is displayed in the `mode-line' face. */); |
| 6574 | mode_line_in_non_selected_windows = 1; |
| 6575 | |
| 6576 | DEFVAR_LISP ("other-window-scroll-buffer", Vother_window_scroll_buffer, |
| 6577 | doc: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */); |
| 6578 | Vother_window_scroll_buffer = Qnil; |
| 6579 | |
| 6580 | DEFVAR_BOOL ("auto-window-vscroll", auto_window_vscroll_p, |
| 6581 | doc: /* Non-nil means to automatically adjust `window-vscroll' to view tall lines. */); |
| 6582 | auto_window_vscroll_p = 1; |
| 6583 | |
| 6584 | DEFVAR_INT ("next-screen-context-lines", next_screen_context_lines, |
| 6585 | doc: /* Number of lines of continuity when scrolling by screenfuls. */); |
| 6586 | next_screen_context_lines = 2; |
| 6587 | |
| 6588 | DEFVAR_LISP ("scroll-preserve-screen-position", |
| 6589 | Vscroll_preserve_screen_position, |
| 6590 | doc: /* Controls if scroll commands move point to keep its screen position unchanged. |
| 6591 | A value of nil means point does not keep its screen position except |
| 6592 | at the scroll margin or window boundary respectively. |
| 6593 | A value of t means point keeps its screen position if the scroll |
| 6594 | command moved it vertically out of the window, e.g. when scrolling |
| 6595 | by full screens. |
| 6596 | Any other value means point always keeps its screen position. |
| 6597 | Scroll commands should have the `scroll-command' property |
| 6598 | on their symbols to be controlled by this variable. */); |
| 6599 | Vscroll_preserve_screen_position = Qnil; |
| 6600 | |
| 6601 | DEFVAR_LISP ("window-point-insertion-type", Vwindow_point_insertion_type, |
| 6602 | doc: /* Type of marker to use for `window-point'. */); |
| 6603 | Vwindow_point_insertion_type = Qnil; |
| 6604 | |
| 6605 | DEFVAR_LISP ("window-configuration-change-hook", |
| 6606 | Vwindow_configuration_change_hook, |
| 6607 | doc: /* Functions to call when window configuration changes. |
| 6608 | The buffer-local part is run once per window, with the relevant window |
| 6609 | selected; while the global part is run only once for the modified frame, |
| 6610 | with the relevant frame selected. */); |
| 6611 | Vwindow_configuration_change_hook = Qnil; |
| 6612 | |
| 6613 | DEFVAR_LISP ("recenter-redisplay", Vrecenter_redisplay, |
| 6614 | doc: /* Non-nil means `recenter' redraws entire frame. |
| 6615 | If this option is non-nil, then the `recenter' command with a nil |
| 6616 | argument will redraw the entire frame; the special value `tty' causes |
| 6617 | the frame to be redrawn only if it is a tty frame. */); |
| 6618 | Vrecenter_redisplay = Qtty; |
| 6619 | |
| 6620 | DEFVAR_LISP ("window-combination-resize", Vwindow_combination_resize, |
| 6621 | doc: /* If t, resize window combinations proportionally. |
| 6622 | If this variable is nil, splitting a window gets the entire screen space |
| 6623 | for displaying the new window from the window to split. Deleting and |
| 6624 | resizing a window preferably resizes one adjacent window only. |
| 6625 | |
| 6626 | If this variable is t, splitting a window tries to get the space |
| 6627 | proportionally from all windows in the same combination. This also |
| 6628 | allows to split a window that is otherwise too small or of fixed size. |
| 6629 | Resizing and deleting a window proportionally resize all windows in the |
| 6630 | same combination. |
| 6631 | |
| 6632 | Other values are reserved for future use. |
| 6633 | |
| 6634 | This variable takes no effect if the variable `window-combination-limit' is |
| 6635 | non-nil. */); |
| 6636 | Vwindow_combination_resize = Qnil; |
| 6637 | |
| 6638 | DEFVAR_LISP ("window-combination-limit", Vwindow_combination_limit, |
| 6639 | doc: /* If non-nil, splitting a window makes a new parent window. |
| 6640 | The following values are recognized: |
| 6641 | |
| 6642 | nil means splitting a window will create a new parent window only if the |
| 6643 | window has no parent window or the window shall become part of a |
| 6644 | combination orthogonal to the one it is part of. |
| 6645 | |
| 6646 | `window-size' means that splitting a window for displaying a buffer |
| 6647 | makes a new parent window provided `display-buffer' is supposed to |
| 6648 | explicitly set the window's size due to the presence of a |
| 6649 | `window-height' or `window-width' entry in the alist used by |
| 6650 | `display-buffer'. Otherwise, this value is handled like nil. |
| 6651 | |
| 6652 | `temp-buffer' means that splitting a window for displaying a temporary |
| 6653 | buffer always makes a new parent window. Otherwise, this value is |
| 6654 | handled like nil. |
| 6655 | |
| 6656 | `display-buffer' means that splitting a window for displaying a buffer |
| 6657 | always makes a new parent window. Since temporary buffers are |
| 6658 | displayed by the function `display-buffer', this value is stronger |
| 6659 | than `temp-buffer'. Splitting a window for other purpose makes a |
| 6660 | new parent window only if needed. |
| 6661 | |
| 6662 | t means that splitting a window always creates a new parent window. If |
| 6663 | all splits behave this way, each frame's window tree is a binary |
| 6664 | tree and every window but the frame's root window has exactly one |
| 6665 | sibling. |
| 6666 | |
| 6667 | Other values are reserved for future use. */); |
| 6668 | Vwindow_combination_limit = Qwindow_size; |
| 6669 | |
| 6670 | DEFVAR_LISP ("window-persistent-parameters", Vwindow_persistent_parameters, |
| 6671 | doc: /* Alist of persistent window parameters. |
| 6672 | This alist specifies which window parameters shall get saved by |
| 6673 | `current-window-configuration' and `window-state-get' and subsequently |
| 6674 | restored to their previous values by `set-window-configuration' and |
| 6675 | `window-state-put'. |
| 6676 | |
| 6677 | The car of each entry of this alist is the symbol specifying the |
| 6678 | parameter. The cdr is one of the following: |
| 6679 | |
| 6680 | nil means the parameter is neither saved by `window-state-get' nor by |
| 6681 | `current-window-configuration'. |
| 6682 | |
| 6683 | t means the parameter is saved by `current-window-configuration' and, |
| 6684 | provided its WRITABLE argument is nil, by `window-state-get'. |
| 6685 | |
| 6686 | The symbol `writable' means the parameter is saved unconditionally by |
| 6687 | both `current-window-configuration' and `window-state-get'. Do not use |
| 6688 | this value for parameters without read syntax (like windows or frames). |
| 6689 | |
| 6690 | Parameters not saved by `current-window-configuration' or |
| 6691 | `window-state-get' are left alone by `set-window-configuration' |
| 6692 | respectively are not installed by `window-state-put'. */); |
| 6693 | Vwindow_persistent_parameters = list1 (Fcons (Qclone_of, Qt)); |
| 6694 | |
| 6695 | defsubr (&Sselected_window); |
| 6696 | defsubr (&Sminibuffer_window); |
| 6697 | defsubr (&Swindow_minibuffer_p); |
| 6698 | defsubr (&Swindowp); |
| 6699 | defsubr (&Swindow_valid_p); |
| 6700 | defsubr (&Swindow_live_p); |
| 6701 | defsubr (&Swindow_frame); |
| 6702 | defsubr (&Sframe_root_window); |
| 6703 | defsubr (&Sframe_first_window); |
| 6704 | defsubr (&Sframe_selected_window); |
| 6705 | defsubr (&Sset_frame_selected_window); |
| 6706 | defsubr (&Spos_visible_in_window_p); |
| 6707 | defsubr (&Swindow_line_height); |
| 6708 | defsubr (&Swindow_buffer); |
| 6709 | defsubr (&Swindow_parent); |
| 6710 | defsubr (&Swindow_top_child); |
| 6711 | defsubr (&Swindow_left_child); |
| 6712 | defsubr (&Swindow_next_sibling); |
| 6713 | defsubr (&Swindow_prev_sibling); |
| 6714 | defsubr (&Swindow_combination_limit); |
| 6715 | defsubr (&Sset_window_combination_limit); |
| 6716 | defsubr (&Swindow_use_time); |
| 6717 | defsubr (&Swindow_top_line); |
| 6718 | defsubr (&Swindow_left_column); |
| 6719 | defsubr (&Swindow_total_height); |
| 6720 | defsubr (&Swindow_total_width); |
| 6721 | defsubr (&Swindow_normal_size); |
| 6722 | defsubr (&Swindow_new_total); |
| 6723 | defsubr (&Swindow_new_normal); |
| 6724 | defsubr (&Sset_window_new_total); |
| 6725 | defsubr (&Sset_window_new_normal); |
| 6726 | defsubr (&Swindow_resize_apply); |
| 6727 | defsubr (&Swindow_body_height); |
| 6728 | defsubr (&Swindow_body_width); |
| 6729 | defsubr (&Swindow_hscroll); |
| 6730 | defsubr (&Sset_window_hscroll); |
| 6731 | defsubr (&Swindow_redisplay_end_trigger); |
| 6732 | defsubr (&Sset_window_redisplay_end_trigger); |
| 6733 | defsubr (&Swindow_edges); |
| 6734 | defsubr (&Swindow_pixel_edges); |
| 6735 | defsubr (&Swindow_absolute_pixel_edges); |
| 6736 | defsubr (&Swindow_inside_edges); |
| 6737 | defsubr (&Swindow_inside_pixel_edges); |
| 6738 | defsubr (&Swindow_inside_absolute_pixel_edges); |
| 6739 | defsubr (&Scoordinates_in_window_p); |
| 6740 | defsubr (&Swindow_at); |
| 6741 | defsubr (&Swindow_point); |
| 6742 | defsubr (&Swindow_start); |
| 6743 | defsubr (&Swindow_end); |
| 6744 | defsubr (&Sset_window_point); |
| 6745 | defsubr (&Sset_window_start); |
| 6746 | defsubr (&Swindow_dedicated_p); |
| 6747 | defsubr (&Sset_window_dedicated_p); |
| 6748 | defsubr (&Swindow_display_table); |
| 6749 | defsubr (&Sset_window_display_table); |
| 6750 | defsubr (&Snext_window); |
| 6751 | defsubr (&Sprevious_window); |
| 6752 | defsubr (&Sget_buffer_window); |
| 6753 | defsubr (&Sdelete_other_windows_internal); |
| 6754 | defsubr (&Sdelete_window_internal); |
| 6755 | defsubr (&Sresize_mini_window_internal); |
| 6756 | defsubr (&Sset_window_buffer); |
| 6757 | defsubr (&Srun_window_configuration_change_hook); |
| 6758 | defsubr (&Sselect_window); |
| 6759 | defsubr (&Sforce_window_update); |
| 6760 | defsubr (&Ssplit_window_internal); |
| 6761 | defsubr (&Sscroll_up); |
| 6762 | defsubr (&Sscroll_down); |
| 6763 | defsubr (&Sscroll_left); |
| 6764 | defsubr (&Sscroll_right); |
| 6765 | defsubr (&Sother_window_for_scrolling); |
| 6766 | defsubr (&Sscroll_other_window); |
| 6767 | defsubr (&Sminibuffer_selected_window); |
| 6768 | defsubr (&Srecenter); |
| 6769 | defsubr (&Swindow_text_height); |
| 6770 | defsubr (&Smove_to_window_line); |
| 6771 | defsubr (&Swindow_configuration_p); |
| 6772 | defsubr (&Swindow_configuration_frame); |
| 6773 | defsubr (&Sset_window_configuration); |
| 6774 | defsubr (&Scurrent_window_configuration); |
| 6775 | defsubr (&Sset_window_margins); |
| 6776 | defsubr (&Swindow_margins); |
| 6777 | defsubr (&Sset_window_fringes); |
| 6778 | defsubr (&Swindow_fringes); |
| 6779 | defsubr (&Sset_window_scroll_bars); |
| 6780 | defsubr (&Swindow_scroll_bars); |
| 6781 | defsubr (&Swindow_vscroll); |
| 6782 | defsubr (&Sset_window_vscroll); |
| 6783 | defsubr (&Scompare_window_configurations); |
| 6784 | defsubr (&Swindow_list); |
| 6785 | defsubr (&Swindow_list_1); |
| 6786 | defsubr (&Swindow_prev_buffers); |
| 6787 | defsubr (&Sset_window_prev_buffers); |
| 6788 | defsubr (&Swindow_next_buffers); |
| 6789 | defsubr (&Sset_window_next_buffers); |
| 6790 | defsubr (&Swindow_parameters); |
| 6791 | defsubr (&Swindow_parameter); |
| 6792 | defsubr (&Sset_window_parameter); |
| 6793 | } |
| 6794 | |
| 6795 | void |
| 6796 | keys_of_window (void) |
| 6797 | { |
| 6798 | initial_define_key (control_x_map, '<', "scroll-left"); |
| 6799 | initial_define_key (control_x_map, '>', "scroll-right"); |
| 6800 | |
| 6801 | initial_define_key (global_map, Ctl ('V'), "scroll-up-command"); |
| 6802 | initial_define_key (meta_map, Ctl ('V'), "scroll-other-window"); |
| 6803 | initial_define_key (meta_map, 'v', "scroll-down-command"); |
| 6804 | } |