| 1 | /* Window creation, deletion and examination for GNU Emacs. |
| 2 | Does not include redisplay. |
| 3 | Copyright (C) 1985,86,87,93,94,95,96,97,1998,2000, 2001, 2002 |
| 4 | Free Software 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 2, or (at your option) |
| 11 | 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; see the file COPYING. If not, write to |
| 20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include <config.h> |
| 24 | #include "lisp.h" |
| 25 | #include "buffer.h" |
| 26 | #include "keyboard.h" |
| 27 | #include "keymap.h" |
| 28 | #include "frame.h" |
| 29 | #include "window.h" |
| 30 | #include "commands.h" |
| 31 | #include "indent.h" |
| 32 | #include "termchar.h" |
| 33 | #include "disptab.h" |
| 34 | #include "dispextern.h" |
| 35 | #include "blockinput.h" |
| 36 | #include "intervals.h" |
| 37 | |
| 38 | #ifdef HAVE_X_WINDOWS |
| 39 | #include "xterm.h" |
| 40 | #endif /* HAVE_X_WINDOWS */ |
| 41 | #ifdef WINDOWSNT |
| 42 | #include "w32term.h" |
| 43 | #endif |
| 44 | #ifdef MSDOS |
| 45 | #include "msdos.h" |
| 46 | #endif |
| 47 | #ifdef macintosh |
| 48 | #include "macterm.h" |
| 49 | #endif |
| 50 | |
| 51 | /* Values returned from coordinates_in_window. */ |
| 52 | |
| 53 | enum window_part |
| 54 | { |
| 55 | ON_NOTHING, |
| 56 | ON_TEXT, |
| 57 | ON_MODE_LINE, |
| 58 | ON_VERTICAL_BORDER, |
| 59 | ON_HEADER_LINE, |
| 60 | ON_LEFT_FRINGE, |
| 61 | ON_RIGHT_FRINGE, |
| 62 | ON_LEFT_MARGIN, |
| 63 | ON_RIGHT_MARGIN |
| 64 | }; |
| 65 | |
| 66 | |
| 67 | Lisp_Object Qwindowp, Qwindow_live_p, Qwindow_configuration_p; |
| 68 | Lisp_Object Qwindow_size_fixed; |
| 69 | extern Lisp_Object Qleft_margin, Qright_margin; |
| 70 | extern Lisp_Object Qheight, Qwidth; |
| 71 | |
| 72 | static int displayed_window_lines P_ ((struct window *)); |
| 73 | static struct window *decode_window P_ ((Lisp_Object)); |
| 74 | static Lisp_Object select_window_1 P_ ((Lisp_Object, int)); |
| 75 | static int count_windows P_ ((struct window *)); |
| 76 | static int get_leaf_windows P_ ((struct window *, struct window **, int)); |
| 77 | static void window_scroll P_ ((Lisp_Object, int, int, int)); |
| 78 | static void window_scroll_pixel_based P_ ((Lisp_Object, int, int, int)); |
| 79 | static void window_scroll_line_based P_ ((Lisp_Object, int, int, int)); |
| 80 | static int window_min_size_1 P_ ((struct window *, int)); |
| 81 | static int window_min_size P_ ((struct window *, int, int, int *)); |
| 82 | static void size_window P_ ((Lisp_Object, int, int, int)); |
| 83 | static int freeze_window_start P_ ((struct window *, void *)); |
| 84 | static int window_fixed_size_p P_ ((struct window *, int, int)); |
| 85 | static void enlarge_window P_ ((Lisp_Object, int, int, int)); |
| 86 | static Lisp_Object window_list P_ ((void)); |
| 87 | static int add_window_to_list P_ ((struct window *, void *)); |
| 88 | static int candidate_window_p P_ ((Lisp_Object, Lisp_Object, Lisp_Object, |
| 89 | Lisp_Object)); |
| 90 | static Lisp_Object next_window P_ ((Lisp_Object, Lisp_Object, |
| 91 | Lisp_Object, int)); |
| 92 | static void decode_next_window_args P_ ((Lisp_Object *, Lisp_Object *, |
| 93 | Lisp_Object *)); |
| 94 | static int foreach_window_1 P_ ((struct window *, |
| 95 | int (* fn) (struct window *, void *), |
| 96 | void *)); |
| 97 | static Lisp_Object window_list_1 P_ ((Lisp_Object, Lisp_Object, Lisp_Object)); |
| 98 | |
| 99 | /* The value of `window-size-fixed'. */ |
| 100 | |
| 101 | int window_size_fixed; |
| 102 | |
| 103 | /* This is the window in which the terminal's cursor should |
| 104 | be left when nothing is being done with it. This must |
| 105 | always be a leaf window, and its buffer is selected by |
| 106 | the top level editing loop at the end of each command. |
| 107 | |
| 108 | This value is always the same as |
| 109 | FRAME_SELECTED_WINDOW (selected_frame). */ |
| 110 | |
| 111 | Lisp_Object selected_window; |
| 112 | |
| 113 | /* A list of all windows for use by next_window and Fwindow_list. |
| 114 | Functions creating or deleting windows should invalidate this cache |
| 115 | by setting it to nil. */ |
| 116 | |
| 117 | Lisp_Object Vwindow_list; |
| 118 | |
| 119 | /* The mini-buffer window of the selected frame. |
| 120 | Note that you cannot test for mini-bufferness of an arbitrary window |
| 121 | by comparing against this; but you can test for mini-bufferness of |
| 122 | the selected window. */ |
| 123 | |
| 124 | Lisp_Object minibuf_window; |
| 125 | |
| 126 | /* Non-nil means it is the window whose mode line should be |
| 127 | shown as the selected window when the minibuffer is selected. */ |
| 128 | |
| 129 | Lisp_Object minibuf_selected_window; |
| 130 | |
| 131 | /* Non-nil means it is the window for C-M-v to scroll |
| 132 | when the mini-buffer is selected. */ |
| 133 | |
| 134 | Lisp_Object Vminibuf_scroll_window; |
| 135 | |
| 136 | /* Non-nil means this is the buffer whose window C-M-v should scroll. */ |
| 137 | |
| 138 | Lisp_Object Vother_window_scroll_buffer; |
| 139 | |
| 140 | /* Non-nil means it's function to call to display temp buffers. */ |
| 141 | |
| 142 | Lisp_Object Vtemp_buffer_show_function; |
| 143 | |
| 144 | /* Non-zero means to use mode-line-inactive face in all windows but the |
| 145 | selected-window and the minibuffer-scroll-window when the |
| 146 | minibuffer is active. */ |
| 147 | int mode_line_in_non_selected_windows; |
| 148 | |
| 149 | /* If a window gets smaller than either of these, it is removed. */ |
| 150 | |
| 151 | EMACS_INT window_min_height; |
| 152 | EMACS_INT window_min_width; |
| 153 | |
| 154 | /* Nonzero implies Fdisplay_buffer should create windows. */ |
| 155 | |
| 156 | int pop_up_windows; |
| 157 | |
| 158 | /* Nonzero implies make new frames for Fdisplay_buffer. */ |
| 159 | |
| 160 | int pop_up_frames; |
| 161 | |
| 162 | /* Nonzero means reuse existing frames for displaying buffers. */ |
| 163 | |
| 164 | int display_buffer_reuse_frames; |
| 165 | |
| 166 | /* Non-nil means use this function instead of default */ |
| 167 | |
| 168 | Lisp_Object Vpop_up_frame_function; |
| 169 | |
| 170 | /* Function to call to handle Fdisplay_buffer. */ |
| 171 | |
| 172 | Lisp_Object Vdisplay_buffer_function; |
| 173 | |
| 174 | /* Non-nil means that Fdisplay_buffer should even the heights of windows. */ |
| 175 | |
| 176 | Lisp_Object Veven_window_heights; |
| 177 | |
| 178 | /* List of buffer *names* for buffers that should have their own frames. */ |
| 179 | |
| 180 | Lisp_Object Vspecial_display_buffer_names; |
| 181 | |
| 182 | /* List of regexps for buffer names that should have their own frames. */ |
| 183 | |
| 184 | Lisp_Object Vspecial_display_regexps; |
| 185 | |
| 186 | /* Function to pop up a special frame. */ |
| 187 | |
| 188 | Lisp_Object Vspecial_display_function; |
| 189 | |
| 190 | /* List of buffer *names* for buffers to appear in selected window. */ |
| 191 | |
| 192 | Lisp_Object Vsame_window_buffer_names; |
| 193 | |
| 194 | /* List of regexps for buffer names to appear in selected window. */ |
| 195 | |
| 196 | Lisp_Object Vsame_window_regexps; |
| 197 | |
| 198 | /* Hook run at end of temp_output_buffer_show. */ |
| 199 | |
| 200 | Lisp_Object Qtemp_buffer_show_hook; |
| 201 | |
| 202 | /* Fdisplay_buffer always splits the largest window |
| 203 | if that window is more than this high. */ |
| 204 | |
| 205 | EMACS_INT split_height_threshold; |
| 206 | |
| 207 | /* Number of lines of continuity in scrolling by screenfuls. */ |
| 208 | |
| 209 | EMACS_INT next_screen_context_lines; |
| 210 | |
| 211 | /* Incremented for each window created. */ |
| 212 | |
| 213 | static int sequence_number; |
| 214 | |
| 215 | /* Nonzero after init_window_once has finished. */ |
| 216 | |
| 217 | static int window_initialized; |
| 218 | |
| 219 | /* Hook to run when window config changes. */ |
| 220 | |
| 221 | Lisp_Object Qwindow_configuration_change_hook; |
| 222 | Lisp_Object Vwindow_configuration_change_hook; |
| 223 | |
| 224 | /* Nonzero means scroll commands try to put point |
| 225 | at the same screen height as previously. */ |
| 226 | |
| 227 | Lisp_Object Vscroll_preserve_screen_position; |
| 228 | |
| 229 | #if 0 /* This isn't used anywhere. */ |
| 230 | /* Nonzero means we can split a frame even if it is "unsplittable". */ |
| 231 | static int inhibit_frame_unsplittable; |
| 232 | #endif /* 0 */ |
| 233 | |
| 234 | extern EMACS_INT scroll_margin; |
| 235 | |
| 236 | extern Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
| 237 | \f |
| 238 | DEFUN ("windowp", Fwindowp, Swindowp, 1, 1, 0, |
| 239 | doc: /* Returns t if OBJECT is a window. */) |
| 240 | (object) |
| 241 | Lisp_Object object; |
| 242 | { |
| 243 | return WINDOWP (object) ? Qt : Qnil; |
| 244 | } |
| 245 | |
| 246 | DEFUN ("window-live-p", Fwindow_live_p, Swindow_live_p, 1, 1, 0, |
| 247 | doc: /* Returns t if OBJECT is a window which is currently visible. */) |
| 248 | (object) |
| 249 | Lisp_Object object; |
| 250 | { |
| 251 | return WINDOW_LIVE_P (object) ? Qt : Qnil; |
| 252 | } |
| 253 | |
| 254 | Lisp_Object |
| 255 | make_window () |
| 256 | { |
| 257 | Lisp_Object val; |
| 258 | register struct window *p; |
| 259 | |
| 260 | p = allocate_window (); |
| 261 | XSETFASTINT (p->sequence_number, ++sequence_number); |
| 262 | XSETFASTINT (p->left, 0); |
| 263 | XSETFASTINT (p->top, 0); |
| 264 | XSETFASTINT (p->height, 0); |
| 265 | XSETFASTINT (p->width, 0); |
| 266 | XSETFASTINT (p->hscroll, 0); |
| 267 | XSETFASTINT (p->min_hscroll, 0); |
| 268 | p->orig_top = p->orig_height = Qnil; |
| 269 | p->start = Fmake_marker (); |
| 270 | p->pointm = Fmake_marker (); |
| 271 | XSETFASTINT (p->use_time, 0); |
| 272 | p->frame = Qnil; |
| 273 | p->display_table = Qnil; |
| 274 | p->dedicated = Qnil; |
| 275 | p->pseudo_window_p = 0; |
| 276 | bzero (&p->cursor, sizeof (p->cursor)); |
| 277 | bzero (&p->last_cursor, sizeof (p->last_cursor)); |
| 278 | bzero (&p->phys_cursor, sizeof (p->phys_cursor)); |
| 279 | p->desired_matrix = p->current_matrix = 0; |
| 280 | p->phys_cursor_type = -1; |
| 281 | p->phys_cursor_width = -1; |
| 282 | p->must_be_updated_p = 0; |
| 283 | XSETFASTINT (p->window_end_vpos, 0); |
| 284 | XSETFASTINT (p->window_end_pos, 0); |
| 285 | p->window_end_valid = Qnil; |
| 286 | p->vscroll = 0; |
| 287 | XSETWINDOW (val, p); |
| 288 | XSETFASTINT (p->last_point, 0); |
| 289 | p->frozen_window_start_p = 0; |
| 290 | p->height_fixed_p = 0; |
| 291 | p->last_cursor_off_p = p->cursor_off_p = 0; |
| 292 | |
| 293 | Vwindow_list = Qnil; |
| 294 | return val; |
| 295 | } |
| 296 | |
| 297 | DEFUN ("selected-window", Fselected_window, Sselected_window, 0, 0, 0, |
| 298 | doc: /* Return the window that the cursor now appears in and commands apply to. */) |
| 299 | () |
| 300 | { |
| 301 | return selected_window; |
| 302 | } |
| 303 | |
| 304 | DEFUN ("minibuffer-window", Fminibuffer_window, Sminibuffer_window, 0, 1, 0, |
| 305 | doc: /* Return the window used now for minibuffers. |
| 306 | If the optional argument FRAME is specified, return the minibuffer window |
| 307 | used by that frame. */) |
| 308 | (frame) |
| 309 | Lisp_Object frame; |
| 310 | { |
| 311 | if (NILP (frame)) |
| 312 | frame = selected_frame; |
| 313 | CHECK_LIVE_FRAME (frame); |
| 314 | return FRAME_MINIBUF_WINDOW (XFRAME (frame)); |
| 315 | } |
| 316 | |
| 317 | DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p, Swindow_minibuffer_p, 0, 1, 0, |
| 318 | doc: /* Returns non-nil if WINDOW is a minibuffer window. */) |
| 319 | (window) |
| 320 | Lisp_Object window; |
| 321 | { |
| 322 | struct window *w = decode_window (window); |
| 323 | return MINI_WINDOW_P (w) ? Qt : Qnil; |
| 324 | } |
| 325 | |
| 326 | |
| 327 | DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p, |
| 328 | Spos_visible_in_window_p, 0, 3, 0, |
| 329 | doc: /* Return t if position POS is currently on the frame in WINDOW. |
| 330 | Return nil if that position is scrolled vertically out of view. |
| 331 | If a character is only partially visible, nil is returned, unless the |
| 332 | optional argument PARTIALLY is non-nil. |
| 333 | POS defaults to point in WINDOW; WINDOW defaults to the selected window. */) |
| 334 | (pos, window, partially) |
| 335 | Lisp_Object pos, window, partially; |
| 336 | { |
| 337 | register struct window *w; |
| 338 | register int posint; |
| 339 | register struct buffer *buf; |
| 340 | struct text_pos top; |
| 341 | Lisp_Object in_window; |
| 342 | int fully_p; |
| 343 | |
| 344 | w = decode_window (window); |
| 345 | buf = XBUFFER (w->buffer); |
| 346 | SET_TEXT_POS_FROM_MARKER (top, w->start); |
| 347 | |
| 348 | if (!NILP (pos)) |
| 349 | { |
| 350 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 351 | posint = XINT (pos); |
| 352 | } |
| 353 | else if (w == XWINDOW (selected_window)) |
| 354 | posint = PT; |
| 355 | else |
| 356 | posint = XMARKER (w->pointm)->charpos; |
| 357 | |
| 358 | /* If position is above window start, it's not visible. */ |
| 359 | if (posint < CHARPOS (top)) |
| 360 | in_window = Qnil; |
| 361 | else if (XFASTINT (w->last_modified) >= BUF_MODIFF (buf) |
| 362 | && XFASTINT (w->last_overlay_modified) >= BUF_OVERLAY_MODIFF (buf) |
| 363 | && posint < BUF_Z (buf) - XFASTINT (w->window_end_pos)) |
| 364 | { |
| 365 | /* If frame is up-to-date, and POSINT is < window end pos, use |
| 366 | that info. This doesn't work for POSINT == end pos, because |
| 367 | the window end pos is actually the position _after_ the last |
| 368 | char in the window. */ |
| 369 | if (NILP (partially)) |
| 370 | { |
| 371 | pos_visible_p (w, posint, &fully_p, NILP (partially)); |
| 372 | in_window = fully_p ? Qt : Qnil; |
| 373 | } |
| 374 | else |
| 375 | in_window = Qt; |
| 376 | } |
| 377 | else if (posint > BUF_ZV (buf)) |
| 378 | in_window = Qnil; |
| 379 | else if (CHARPOS (top) < BUF_BEGV (buf) || CHARPOS (top) > BUF_ZV (buf)) |
| 380 | /* If window start is out of range, do something reasonable. */ |
| 381 | in_window = Qnil; |
| 382 | else |
| 383 | { |
| 384 | if (pos_visible_p (w, posint, &fully_p, NILP (partially))) |
| 385 | in_window = !NILP (partially) || fully_p ? Qt : Qnil; |
| 386 | else |
| 387 | in_window = Qnil; |
| 388 | } |
| 389 | |
| 390 | return in_window; |
| 391 | } |
| 392 | |
| 393 | \f |
| 394 | static struct window * |
| 395 | decode_window (window) |
| 396 | register Lisp_Object window; |
| 397 | { |
| 398 | if (NILP (window)) |
| 399 | return XWINDOW (selected_window); |
| 400 | |
| 401 | CHECK_LIVE_WINDOW (window); |
| 402 | return XWINDOW (window); |
| 403 | } |
| 404 | |
| 405 | DEFUN ("window-buffer", Fwindow_buffer, Swindow_buffer, 0, 1, 0, |
| 406 | doc: /* Return the buffer that WINDOW is displaying. */) |
| 407 | (window) |
| 408 | Lisp_Object window; |
| 409 | { |
| 410 | return decode_window (window)->buffer; |
| 411 | } |
| 412 | |
| 413 | DEFUN ("window-height", Fwindow_height, Swindow_height, 0, 1, 0, |
| 414 | doc: /* Return the number of lines in WINDOW (including its mode line). */) |
| 415 | (window) |
| 416 | Lisp_Object window; |
| 417 | { |
| 418 | return decode_window (window)->height; |
| 419 | } |
| 420 | |
| 421 | DEFUN ("window-width", Fwindow_width, Swindow_width, 0, 1, 0, |
| 422 | doc: /* Return the number of display columns in WINDOW. |
| 423 | This is the width that is usable columns available for text in WINDOW. |
| 424 | If you want to find out how many columns WINDOW takes up, |
| 425 | use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */) |
| 426 | (window) |
| 427 | Lisp_Object window; |
| 428 | { |
| 429 | return make_number (window_internal_width (decode_window (window))); |
| 430 | } |
| 431 | |
| 432 | DEFUN ("window-hscroll", Fwindow_hscroll, Swindow_hscroll, 0, 1, 0, |
| 433 | doc: /* Return the number of columns by which WINDOW is scrolled from left margin. */) |
| 434 | (window) |
| 435 | Lisp_Object window; |
| 436 | { |
| 437 | return decode_window (window)->hscroll; |
| 438 | } |
| 439 | |
| 440 | DEFUN ("set-window-hscroll", Fset_window_hscroll, Sset_window_hscroll, 2, 2, 0, |
| 441 | doc: /* Set number of columns WINDOW is scrolled from left margin to NCOL. |
| 442 | NCOL should be zero or positive. */) |
| 443 | (window, ncol) |
| 444 | Lisp_Object window, ncol; |
| 445 | { |
| 446 | struct window *w = decode_window (window); |
| 447 | int hscroll; |
| 448 | |
| 449 | CHECK_NUMBER (ncol); |
| 450 | hscroll = max (0, XINT (ncol)); |
| 451 | |
| 452 | /* Prevent redisplay shortcuts when changing the hscroll. */ |
| 453 | if (XINT (w->hscroll) != hscroll) |
| 454 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 455 | |
| 456 | w->hscroll = make_number (hscroll); |
| 457 | return ncol; |
| 458 | } |
| 459 | |
| 460 | DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger, |
| 461 | Swindow_redisplay_end_trigger, 0, 1, 0, |
| 462 | doc: /* Return WINDOW's redisplay end trigger value. |
| 463 | See `set-window-redisplay-end-trigger' for more information. */) |
| 464 | (window) |
| 465 | Lisp_Object window; |
| 466 | { |
| 467 | return decode_window (window)->redisplay_end_trigger; |
| 468 | } |
| 469 | |
| 470 | DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger, |
| 471 | Sset_window_redisplay_end_trigger, 2, 2, 0, |
| 472 | doc: /* Set WINDOW's redisplay end trigger value to VALUE. |
| 473 | VALUE should be a buffer position (typically a marker) or nil. |
| 474 | If it is a buffer position, then if redisplay in WINDOW reaches a position |
| 475 | beyond VALUE, the functions in `redisplay-end-trigger-functions' are called |
| 476 | with two arguments: WINDOW, and the end trigger value. |
| 477 | Afterwards the end-trigger value is reset to nil. */) |
| 478 | (window, value) |
| 479 | register Lisp_Object window, value; |
| 480 | { |
| 481 | register struct window *w; |
| 482 | |
| 483 | w = decode_window (window); |
| 484 | w->redisplay_end_trigger = value; |
| 485 | return value; |
| 486 | } |
| 487 | |
| 488 | DEFUN ("window-edges", Fwindow_edges, Swindow_edges, 0, 1, 0, |
| 489 | doc: /* Return a list of the edge coordinates of WINDOW. |
| 490 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame. |
| 491 | RIGHT is one more than the rightmost column used by WINDOW, |
| 492 | and BOTTOM is one more than the bottommost row used by WINDOW |
| 493 | and its mode-line. */) |
| 494 | (window) |
| 495 | Lisp_Object window; |
| 496 | { |
| 497 | register struct window *w = decode_window (window); |
| 498 | |
| 499 | return Fcons (w->left, Fcons (w->top, |
| 500 | Fcons (make_number (WINDOW_RIGHT_EDGE (w)), |
| 501 | Fcons (make_number (XFASTINT (w->top) |
| 502 | + XFASTINT (w->height)), |
| 503 | Qnil)))); |
| 504 | } |
| 505 | |
| 506 | /* Test if the character at column *X, row *Y is within window W. |
| 507 | If it is not, return 0; |
| 508 | if it is in the window's text area, |
| 509 | set *x and *y to its location relative to the upper left corner |
| 510 | of the window, and |
| 511 | return 1; |
| 512 | if it is on the window's modeline, return 2; |
| 513 | if it is on the border between the window and its right sibling, |
| 514 | return 3. |
| 515 | if it is on the window's top line, return 4; |
| 516 | if it is in left or right fringe of the window, |
| 517 | return 5 or 6, and convert *X and *Y to window-relative coordinates; |
| 518 | if it is in the marginal area to the left/right of the window, |
| 519 | return 7 or 8, and convert *X and *Y to window-relative coordinates. |
| 520 | |
| 521 | X and Y are frame relative pixel coordinates. */ |
| 522 | |
| 523 | static enum window_part |
| 524 | coordinates_in_window (w, x, y) |
| 525 | register struct window *w; |
| 526 | register int *x, *y; |
| 527 | { |
| 528 | /* Let's make this a global enum later, instead of using numbers |
| 529 | everywhere. */ |
| 530 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 531 | int left_x, right_x, top_y, bottom_y; |
| 532 | enum window_part part; |
| 533 | int ux = CANON_X_UNIT (f); |
| 534 | int x0 = XFASTINT (w->left) * ux; |
| 535 | int x1 = x0 + XFASTINT (w->width) * ux; |
| 536 | /* The width of the area where the vertical line can be dragged. |
| 537 | (Between mode lines for instance. */ |
| 538 | int grabbable_width = ux; |
| 539 | int lmargin_width = 0, rmargin_width = 0; |
| 540 | |
| 541 | if (*x < x0 || *x >= x1) |
| 542 | return ON_NOTHING; |
| 543 | |
| 544 | /* In what's below, we subtract 1 when computing right_x because we |
| 545 | want the rightmost pixel, which is given by left_pixel+width-1. */ |
| 546 | if (w->pseudo_window_p) |
| 547 | { |
| 548 | left_x = 0; |
| 549 | right_x = XFASTINT (w->width) * CANON_X_UNIT (f) - 1; |
| 550 | top_y = WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w); |
| 551 | bottom_y = WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w); |
| 552 | } |
| 553 | else |
| 554 | { |
| 555 | left_x = (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w) |
| 556 | - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f)); |
| 557 | right_x = WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w) - 1; |
| 558 | top_y = (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w) |
| 559 | - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f)); |
| 560 | bottom_y = WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w); |
| 561 | } |
| 562 | |
| 563 | /* On the mode line or header line? If it's near the start of |
| 564 | the mode or header line of window that's has a horizontal |
| 565 | sibling, say it's on the vertical line. That's to be able |
| 566 | to resize windows horizontally in case we're using toolkit |
| 567 | scroll bars. */ |
| 568 | |
| 569 | if (WINDOW_WANTS_MODELINE_P (w) |
| 570 | && *y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w) |
| 571 | && *y < bottom_y) |
| 572 | { |
| 573 | /* We're somewhere on the mode line. We consider the place |
| 574 | between mode lines of horizontally adjacent mode lines |
| 575 | as the vertical border. If scroll bars on the left, |
| 576 | return the right window. */ |
| 577 | part = ON_MODE_LINE; |
| 578 | |
| 579 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f)) |
| 580 | { |
| 581 | if (abs (*x - x0) < grabbable_width) |
| 582 | part = ON_VERTICAL_BORDER; |
| 583 | } |
| 584 | else if (!WINDOW_RIGHTMOST_P (w) && abs (*x - x1) < grabbable_width) |
| 585 | part = ON_VERTICAL_BORDER; |
| 586 | } |
| 587 | else if (WINDOW_WANTS_HEADER_LINE_P (w) |
| 588 | && *y < top_y + CURRENT_HEADER_LINE_HEIGHT (w) |
| 589 | && *y >= top_y) |
| 590 | { |
| 591 | part = ON_HEADER_LINE; |
| 592 | |
| 593 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f)) |
| 594 | { |
| 595 | if (abs (*x - x0) < grabbable_width) |
| 596 | part = ON_VERTICAL_BORDER; |
| 597 | } |
| 598 | else if (!WINDOW_RIGHTMOST_P (w) && abs (*x - x1) < grabbable_width) |
| 599 | part = ON_VERTICAL_BORDER; |
| 600 | } |
| 601 | /* Outside anything interesting? */ |
| 602 | else if (*y < top_y |
| 603 | || *y >= bottom_y |
| 604 | || *x < (left_x |
| 605 | - FRAME_LEFT_FRINGE_WIDTH (f) |
| 606 | - FRAME_LEFT_SCROLL_BAR_WIDTH (f) * ux) |
| 607 | || *x > (right_x |
| 608 | + FRAME_RIGHT_FRINGE_WIDTH (f) |
| 609 | + FRAME_RIGHT_SCROLL_BAR_WIDTH (f) * ux)) |
| 610 | { |
| 611 | part = ON_NOTHING; |
| 612 | } |
| 613 | else if (FRAME_WINDOW_P (f)) |
| 614 | { |
| 615 | if (!w->pseudo_window_p |
| 616 | && !FRAME_HAS_VERTICAL_SCROLL_BARS (f) |
| 617 | && !WINDOW_RIGHTMOST_P (w) |
| 618 | && (abs (*x - right_x - FRAME_RIGHT_FRINGE_WIDTH (f)) < grabbable_width)) |
| 619 | { |
| 620 | part = ON_VERTICAL_BORDER; |
| 621 | } |
| 622 | else if (*x < left_x || *x > right_x) |
| 623 | { |
| 624 | /* Other lines than the mode line don't include fringes and |
| 625 | scroll bars on the left. */ |
| 626 | |
| 627 | /* Convert X and Y to window-relative pixel coordinates. */ |
| 628 | *x -= left_x; |
| 629 | *y -= top_y; |
| 630 | part = *x < left_x ? ON_LEFT_FRINGE : ON_RIGHT_FRINGE; |
| 631 | } |
| 632 | else |
| 633 | { |
| 634 | lmargin_width = window_box_width (w, LEFT_MARGIN_AREA); |
| 635 | rmargin_width = window_box_width (w, RIGHT_MARGIN_AREA); |
| 636 | /* You can never be on a margin area if its width is zero. */ |
| 637 | if (lmargin_width |
| 638 | && *x <= window_box_right (w, LEFT_MARGIN_AREA)) |
| 639 | part = ON_LEFT_MARGIN; |
| 640 | else if (rmargin_width |
| 641 | && *x >= window_box_left (w, RIGHT_MARGIN_AREA)) |
| 642 | part = ON_RIGHT_MARGIN; |
| 643 | else |
| 644 | { |
| 645 | part = ON_TEXT; |
| 646 | *x -= left_x; |
| 647 | *y -= top_y; |
| 648 | } |
| 649 | } |
| 650 | } |
| 651 | else |
| 652 | { |
| 653 | /* Need to say "*x > right_x" rather than >=, since on character |
| 654 | terminals, the vertical line's x coordinate is right_x. */ |
| 655 | if (*x < left_x || *x > right_x) |
| 656 | { |
| 657 | /* Other lines than the mode line don't include fringes and |
| 658 | scroll bars on the left. */ |
| 659 | |
| 660 | /* Convert X and Y to window-relative pixel coordinates. */ |
| 661 | *x -= left_x; |
| 662 | *y -= top_y; |
| 663 | part = *x < left_x ? ON_LEFT_FRINGE : ON_RIGHT_FRINGE; |
| 664 | } |
| 665 | /* Here, too, "*x > right_x" is because of character terminals. */ |
| 666 | else if (!w->pseudo_window_p |
| 667 | && !WINDOW_RIGHTMOST_P (w) |
| 668 | && *x > right_x - ux) |
| 669 | { |
| 670 | /* On the border on the right side of the window? Assume that |
| 671 | this area begins at RIGHT_X minus a canonical char width. */ |
| 672 | part = ON_VERTICAL_BORDER; |
| 673 | } |
| 674 | else |
| 675 | { |
| 676 | lmargin_width = window_box_width (w, LEFT_MARGIN_AREA); |
| 677 | rmargin_width = window_box_width (w, RIGHT_MARGIN_AREA); |
| 678 | /* You can never be on a margin area if its width is zero. |
| 679 | This is especially important for character terminals. */ |
| 680 | if (lmargin_width |
| 681 | && *x <= window_box_right (w, LEFT_MARGIN_AREA)) |
| 682 | part = ON_LEFT_MARGIN; |
| 683 | else if (rmargin_width |
| 684 | && *x >= window_box_left (w, RIGHT_MARGIN_AREA)) |
| 685 | part = ON_RIGHT_MARGIN; |
| 686 | else |
| 687 | { |
| 688 | part = ON_TEXT; |
| 689 | /* Convert X and Y to window-relative pixel coordinates. */ |
| 690 | *x -= left_x; |
| 691 | *y -= top_y; |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | return part; |
| 697 | } |
| 698 | |
| 699 | |
| 700 | DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p, |
| 701 | Scoordinates_in_window_p, 2, 2, 0, |
| 702 | doc: /* Return non-nil if COORDINATES are in WINDOW. |
| 703 | COORDINATES is a cons of the form (X . Y), X and Y being distances |
| 704 | measured in characters from the upper-left corner of the frame. |
| 705 | \(0 . 0) denotes the character in the upper left corner of the |
| 706 | frame. |
| 707 | If COORDINATES are in the text portion of WINDOW, |
| 708 | the coordinates relative to the window are returned. |
| 709 | If they are in the mode line of WINDOW, `mode-line' is returned. |
| 710 | If they are in the top mode line of WINDOW, `header-line' is returned. |
| 711 | If they are in the left fringe of WINDOW, `left-fringe' is returned. |
| 712 | If they are in the right fringe of WINDOW, `right-fringe' is returned. |
| 713 | If they are on the border between WINDOW and its right sibling, |
| 714 | `vertical-line' is returned. |
| 715 | If they are in the windows's left or right marginal areas, `left-margin'\n\ |
| 716 | or `right-margin' is returned. */) |
| 717 | (coordinates, window) |
| 718 | register Lisp_Object coordinates, window; |
| 719 | { |
| 720 | struct window *w; |
| 721 | struct frame *f; |
| 722 | int x, y; |
| 723 | Lisp_Object lx, ly; |
| 724 | |
| 725 | CHECK_LIVE_WINDOW (window); |
| 726 | w = XWINDOW (window); |
| 727 | f = XFRAME (w->frame); |
| 728 | CHECK_CONS (coordinates); |
| 729 | lx = Fcar (coordinates); |
| 730 | ly = Fcdr (coordinates); |
| 731 | CHECK_NUMBER_OR_FLOAT (lx); |
| 732 | CHECK_NUMBER_OR_FLOAT (ly); |
| 733 | x = PIXEL_X_FROM_CANON_X (f, lx); |
| 734 | y = PIXEL_Y_FROM_CANON_Y (f, ly); |
| 735 | |
| 736 | switch (coordinates_in_window (w, &x, &y)) |
| 737 | { |
| 738 | case ON_NOTHING: |
| 739 | return Qnil; |
| 740 | |
| 741 | case ON_TEXT: |
| 742 | /* X and Y are now window relative pixel coordinates. Convert |
| 743 | them to canonical char units before returning them. */ |
| 744 | return Fcons (CANON_X_FROM_PIXEL_X (f, x), |
| 745 | CANON_Y_FROM_PIXEL_Y (f, y)); |
| 746 | |
| 747 | case ON_MODE_LINE: |
| 748 | return Qmode_line; |
| 749 | |
| 750 | case ON_VERTICAL_BORDER: |
| 751 | return Qvertical_line; |
| 752 | |
| 753 | case ON_HEADER_LINE: |
| 754 | return Qheader_line; |
| 755 | |
| 756 | case ON_LEFT_FRINGE: |
| 757 | return Qleft_fringe; |
| 758 | |
| 759 | case ON_RIGHT_FRINGE: |
| 760 | return Qright_fringe; |
| 761 | |
| 762 | case ON_LEFT_MARGIN: |
| 763 | return Qleft_margin; |
| 764 | |
| 765 | case ON_RIGHT_MARGIN: |
| 766 | return Qright_margin; |
| 767 | |
| 768 | default: |
| 769 | abort (); |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | |
| 774 | /* Callback for foreach_window, used in window_from_coordinates. |
| 775 | Check if window W contains coordinates specified by USER_DATA which |
| 776 | is actually a pointer to a struct check_window_data CW. |
| 777 | |
| 778 | Check if window W contains coordinates *CW->x and *CW->y. If it |
| 779 | does, return W in *CW->window, as Lisp_Object, and return in |
| 780 | *CW->part the part of the window under coordinates *X,*Y. Return |
| 781 | zero from this function to stop iterating over windows. */ |
| 782 | |
| 783 | struct check_window_data |
| 784 | { |
| 785 | Lisp_Object *window; |
| 786 | int *x, *y, *part; |
| 787 | }; |
| 788 | |
| 789 | static int |
| 790 | check_window_containing (w, user_data) |
| 791 | struct window *w; |
| 792 | void *user_data; |
| 793 | { |
| 794 | struct check_window_data *cw = (struct check_window_data *) user_data; |
| 795 | enum window_part found; |
| 796 | int continue_p = 1; |
| 797 | |
| 798 | found = coordinates_in_window (w, cw->x, cw->y); |
| 799 | if (found != ON_NOTHING) |
| 800 | { |
| 801 | *cw->part = found - 1; |
| 802 | XSETWINDOW (*cw->window, w); |
| 803 | continue_p = 0; |
| 804 | } |
| 805 | |
| 806 | return continue_p; |
| 807 | } |
| 808 | |
| 809 | |
| 810 | /* Find the window containing frame-relative pixel position X/Y and |
| 811 | return it as a Lisp_Object. If X, Y is on the window's modeline, |
| 812 | set *PART to 1; if it is on the separating line between the window |
| 813 | and its right sibling, set it to 2; otherwise set it to 0. If |
| 814 | there is no window under X, Y return nil and leave *PART |
| 815 | unmodified. TOOL_BAR_P non-zero means detect tool-bar windows. |
| 816 | |
| 817 | This function was previously implemented with a loop cycling over |
| 818 | windows with Fnext_window, and starting with the frame's selected |
| 819 | window. It turned out that this doesn't work with an |
| 820 | implementation of next_window using Vwindow_list, because |
| 821 | FRAME_SELECTED_WINDOW (F) is not always contained in the window |
| 822 | tree of F when this function is called asynchronously from |
| 823 | note_mouse_highlight. The original loop didn't terminate in this |
| 824 | case. */ |
| 825 | |
| 826 | Lisp_Object |
| 827 | window_from_coordinates (f, x, y, part, tool_bar_p) |
| 828 | struct frame *f; |
| 829 | int x, y; |
| 830 | int *part; |
| 831 | int tool_bar_p; |
| 832 | { |
| 833 | Lisp_Object window; |
| 834 | struct check_window_data cw; |
| 835 | |
| 836 | window = Qnil; |
| 837 | cw.window = &window, cw.x = &x, cw.y = &y; cw.part = part; |
| 838 | foreach_window (f, check_window_containing, &cw); |
| 839 | |
| 840 | /* If not found above, see if it's in the tool bar window, if a tool |
| 841 | bar exists. */ |
| 842 | if (NILP (window) |
| 843 | && tool_bar_p |
| 844 | && WINDOWP (f->tool_bar_window) |
| 845 | && XINT (XWINDOW (f->tool_bar_window)->height) > 0 |
| 846 | && (coordinates_in_window (XWINDOW (f->tool_bar_window), &x, &y) |
| 847 | != ON_NOTHING)) |
| 848 | { |
| 849 | *part = 0; |
| 850 | window = f->tool_bar_window; |
| 851 | } |
| 852 | |
| 853 | return window; |
| 854 | } |
| 855 | |
| 856 | DEFUN ("window-at", Fwindow_at, Swindow_at, 2, 3, 0, |
| 857 | doc: /* Return window containing coordinates X and Y on FRAME. |
| 858 | If omitted, FRAME defaults to the currently selected frame. |
| 859 | The top left corner of the frame is considered to be row 0, |
| 860 | column 0. */) |
| 861 | (x, y, frame) |
| 862 | Lisp_Object x, y, frame; |
| 863 | { |
| 864 | int part; |
| 865 | struct frame *f; |
| 866 | |
| 867 | if (NILP (frame)) |
| 868 | frame = selected_frame; |
| 869 | CHECK_LIVE_FRAME (frame); |
| 870 | f = XFRAME (frame); |
| 871 | |
| 872 | /* Check that arguments are integers or floats. */ |
| 873 | CHECK_NUMBER_OR_FLOAT (x); |
| 874 | CHECK_NUMBER_OR_FLOAT (y); |
| 875 | |
| 876 | return window_from_coordinates (f, |
| 877 | PIXEL_X_FROM_CANON_X (f, x), |
| 878 | PIXEL_Y_FROM_CANON_Y (f, y), |
| 879 | &part, 0); |
| 880 | } |
| 881 | |
| 882 | DEFUN ("window-point", Fwindow_point, Swindow_point, 0, 1, 0, |
| 883 | doc: /* Return current value of point in WINDOW. |
| 884 | For a nonselected window, this is the value point would have |
| 885 | if that window were selected. |
| 886 | |
| 887 | Note that, when WINDOW is the selected window and its buffer |
| 888 | is also currently selected, the value returned is the same as (point). |
| 889 | It would be more strictly correct to return the `top-level' value |
| 890 | of point, outside of any save-excursion forms. |
| 891 | But that is hard to define. */) |
| 892 | (window) |
| 893 | Lisp_Object window; |
| 894 | { |
| 895 | register struct window *w = decode_window (window); |
| 896 | |
| 897 | if (w == XWINDOW (selected_window) |
| 898 | && current_buffer == XBUFFER (w->buffer)) |
| 899 | return Fpoint (); |
| 900 | return Fmarker_position (w->pointm); |
| 901 | } |
| 902 | |
| 903 | DEFUN ("window-start", Fwindow_start, Swindow_start, 0, 1, 0, |
| 904 | doc: /* Return position at which display currently starts in WINDOW. |
| 905 | This is updated by redisplay or by calling `set-window-start'. */) |
| 906 | (window) |
| 907 | Lisp_Object window; |
| 908 | { |
| 909 | return Fmarker_position (decode_window (window)->start); |
| 910 | } |
| 911 | |
| 912 | /* This is text temporarily removed from the doc string below. |
| 913 | |
| 914 | This function returns nil if the position is not currently known. |
| 915 | That happens when redisplay is preempted and doesn't finish. |
| 916 | If in that case you want to compute where the end of the window would |
| 917 | have been if redisplay had finished, do this: |
| 918 | (save-excursion |
| 919 | (goto-char (window-start window)) |
| 920 | (vertical-motion (1- (window-height window)) window) |
| 921 | (point))") */ |
| 922 | |
| 923 | DEFUN ("window-end", Fwindow_end, Swindow_end, 0, 2, 0, |
| 924 | doc: /* Return position at which display currently ends in WINDOW. |
| 925 | This is updated by redisplay, when it runs to completion. |
| 926 | Simply changing the buffer text or setting `window-start' |
| 927 | does not update this value. |
| 928 | If UPDATE is non-nil, compute the up-to-date position |
| 929 | if it isn't already recorded. */) |
| 930 | (window, update) |
| 931 | Lisp_Object window, update; |
| 932 | { |
| 933 | Lisp_Object value; |
| 934 | struct window *w = decode_window (window); |
| 935 | Lisp_Object buf; |
| 936 | |
| 937 | buf = w->buffer; |
| 938 | CHECK_BUFFER (buf); |
| 939 | |
| 940 | #if 0 /* This change broke some things. We should make it later. */ |
| 941 | /* If we don't know the end position, return nil. |
| 942 | The user can compute it with vertical-motion if he wants to. |
| 943 | It would be nicer to do it automatically, |
| 944 | but that's so slow that it would probably bother people. */ |
| 945 | if (NILP (w->window_end_valid)) |
| 946 | return Qnil; |
| 947 | #endif |
| 948 | |
| 949 | if (! NILP (update) |
| 950 | && ! (! NILP (w->window_end_valid) |
| 951 | && XFASTINT (w->last_modified) >= MODIFF)) |
| 952 | { |
| 953 | struct text_pos startp; |
| 954 | struct it it; |
| 955 | struct buffer *old_buffer = NULL, *b = XBUFFER (buf); |
| 956 | |
| 957 | /* In case W->start is out of the range, use something |
| 958 | reasonable. This situation occured when loading a file with |
| 959 | `-l' containing a call to `rmail' with subsequent other |
| 960 | commands. At the end, W->start happened to be BEG, while |
| 961 | rmail had already narrowed the buffer. */ |
| 962 | if (XMARKER (w->start)->charpos < BEGV) |
| 963 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); |
| 964 | else if (XMARKER (w->start)->charpos > ZV) |
| 965 | SET_TEXT_POS (startp, ZV, ZV_BYTE); |
| 966 | else |
| 967 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
| 968 | |
| 969 | /* Cannot use Fvertical_motion because that function doesn't |
| 970 | cope with variable-height lines. */ |
| 971 | if (b != current_buffer) |
| 972 | { |
| 973 | old_buffer = current_buffer; |
| 974 | set_buffer_internal (b); |
| 975 | } |
| 976 | |
| 977 | start_display (&it, w, startp); |
| 978 | move_it_vertically (&it, window_box_height (w)); |
| 979 | if (it.current_y < it.last_visible_y) |
| 980 | move_it_past_eol (&it); |
| 981 | value = make_number (IT_CHARPOS (it)); |
| 982 | |
| 983 | if (old_buffer) |
| 984 | set_buffer_internal (old_buffer); |
| 985 | } |
| 986 | else |
| 987 | XSETINT (value, BUF_Z (XBUFFER (buf)) - XFASTINT (w->window_end_pos)); |
| 988 | |
| 989 | return value; |
| 990 | } |
| 991 | |
| 992 | DEFUN ("set-window-point", Fset_window_point, Sset_window_point, 2, 2, 0, |
| 993 | doc: /* Make point value in WINDOW be at position POS in WINDOW's buffer. */) |
| 994 | (window, pos) |
| 995 | Lisp_Object window, pos; |
| 996 | { |
| 997 | register struct window *w = decode_window (window); |
| 998 | |
| 999 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1000 | if (w == XWINDOW (selected_window) |
| 1001 | && XBUFFER (w->buffer) == current_buffer) |
| 1002 | Fgoto_char (pos); |
| 1003 | else |
| 1004 | set_marker_restricted (w->pointm, pos, w->buffer); |
| 1005 | |
| 1006 | /* We have to make sure that redisplay updates the window to show |
| 1007 | the new value of point. */ |
| 1008 | if (!EQ (window, selected_window)) |
| 1009 | ++windows_or_buffers_changed; |
| 1010 | |
| 1011 | return pos; |
| 1012 | } |
| 1013 | |
| 1014 | DEFUN ("set-window-start", Fset_window_start, Sset_window_start, 2, 3, 0, |
| 1015 | doc: /* Make display in WINDOW start at position POS in WINDOW's buffer. |
| 1016 | Optional third arg NOFORCE non-nil inhibits next redisplay |
| 1017 | from overriding motion of point in order to display at this exact start. */) |
| 1018 | (window, pos, noforce) |
| 1019 | Lisp_Object window, pos, noforce; |
| 1020 | { |
| 1021 | register struct window *w = decode_window (window); |
| 1022 | |
| 1023 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1024 | set_marker_restricted (w->start, pos, w->buffer); |
| 1025 | /* this is not right, but much easier than doing what is right. */ |
| 1026 | w->start_at_line_beg = Qnil; |
| 1027 | if (NILP (noforce)) |
| 1028 | w->force_start = Qt; |
| 1029 | w->update_mode_line = Qt; |
| 1030 | XSETFASTINT (w->last_modified, 0); |
| 1031 | XSETFASTINT (w->last_overlay_modified, 0); |
| 1032 | if (!EQ (window, selected_window)) |
| 1033 | windows_or_buffers_changed++; |
| 1034 | |
| 1035 | return pos; |
| 1036 | } |
| 1037 | |
| 1038 | DEFUN ("window-dedicated-p", Fwindow_dedicated_p, Swindow_dedicated_p, |
| 1039 | 1, 1, 0, |
| 1040 | doc: /* Return WINDOW's dedicated object, usually t or nil. |
| 1041 | See also `set-window-dedicated-p'. */) |
| 1042 | (window) |
| 1043 | Lisp_Object window; |
| 1044 | { |
| 1045 | return decode_window (window)->dedicated; |
| 1046 | } |
| 1047 | |
| 1048 | DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p, |
| 1049 | Sset_window_dedicated_p, 2, 2, 0, |
| 1050 | doc: /* Control whether WINDOW is dedicated to the buffer it displays. |
| 1051 | If it is dedicated, Emacs will not automatically change |
| 1052 | which buffer appears in it. |
| 1053 | The second argument is the new value for the dedication flag; |
| 1054 | non-nil means yes. */) |
| 1055 | (window, arg) |
| 1056 | Lisp_Object window, arg; |
| 1057 | { |
| 1058 | register struct window *w = decode_window (window); |
| 1059 | |
| 1060 | if (NILP (arg)) |
| 1061 | w->dedicated = Qnil; |
| 1062 | else |
| 1063 | w->dedicated = Qt; |
| 1064 | |
| 1065 | return w->dedicated; |
| 1066 | } |
| 1067 | |
| 1068 | DEFUN ("window-display-table", Fwindow_display_table, Swindow_display_table, |
| 1069 | 0, 1, 0, |
| 1070 | doc: /* Return the display-table that WINDOW is using. */) |
| 1071 | (window) |
| 1072 | Lisp_Object window; |
| 1073 | { |
| 1074 | return decode_window (window)->display_table; |
| 1075 | } |
| 1076 | |
| 1077 | /* Get the display table for use on window W. This is either W's |
| 1078 | display table or W's buffer's display table. Ignore the specified |
| 1079 | tables if they are not valid; if no valid table is specified, |
| 1080 | return 0. */ |
| 1081 | |
| 1082 | struct Lisp_Char_Table * |
| 1083 | window_display_table (w) |
| 1084 | struct window *w; |
| 1085 | { |
| 1086 | struct Lisp_Char_Table *dp = NULL; |
| 1087 | |
| 1088 | if (DISP_TABLE_P (w->display_table)) |
| 1089 | dp = XCHAR_TABLE (w->display_table); |
| 1090 | else if (BUFFERP (w->buffer)) |
| 1091 | { |
| 1092 | struct buffer *b = XBUFFER (w->buffer); |
| 1093 | |
| 1094 | if (DISP_TABLE_P (b->display_table)) |
| 1095 | dp = XCHAR_TABLE (b->display_table); |
| 1096 | else if (DISP_TABLE_P (Vstandard_display_table)) |
| 1097 | dp = XCHAR_TABLE (Vstandard_display_table); |
| 1098 | } |
| 1099 | |
| 1100 | return dp; |
| 1101 | } |
| 1102 | |
| 1103 | DEFUN ("set-window-display-table", Fset_window_display_table, Sset_window_display_table, 2, 2, 0, |
| 1104 | doc: /* Set WINDOW's display-table to TABLE. */) |
| 1105 | (window, table) |
| 1106 | register Lisp_Object window, table; |
| 1107 | { |
| 1108 | register struct window *w; |
| 1109 | |
| 1110 | w = decode_window (window); |
| 1111 | w->display_table = table; |
| 1112 | return table; |
| 1113 | } |
| 1114 | \f |
| 1115 | /* Record info on buffer window w is displaying |
| 1116 | when it is about to cease to display that buffer. */ |
| 1117 | static void |
| 1118 | unshow_buffer (w) |
| 1119 | register struct window *w; |
| 1120 | { |
| 1121 | Lisp_Object buf; |
| 1122 | struct buffer *b; |
| 1123 | |
| 1124 | buf = w->buffer; |
| 1125 | b = XBUFFER (buf); |
| 1126 | if (b != XMARKER (w->pointm)->buffer) |
| 1127 | abort (); |
| 1128 | |
| 1129 | #if 0 |
| 1130 | if (w == XWINDOW (selected_window) |
| 1131 | || ! EQ (buf, XWINDOW (selected_window)->buffer)) |
| 1132 | /* Do this except when the selected window's buffer |
| 1133 | is being removed from some other window. */ |
| 1134 | #endif |
| 1135 | /* last_window_start records the start position that this buffer |
| 1136 | had in the last window to be disconnected from it. |
| 1137 | Now that this statement is unconditional, |
| 1138 | it is possible for the buffer to be displayed in the |
| 1139 | selected window, while last_window_start reflects another |
| 1140 | window which was recently showing the same buffer. |
| 1141 | Some people might say that might be a good thing. Let's see. */ |
| 1142 | b->last_window_start = marker_position (w->start); |
| 1143 | |
| 1144 | /* Point in the selected window's buffer |
| 1145 | is actually stored in that buffer, and the window's pointm isn't used. |
| 1146 | So don't clobber point in that buffer. */ |
| 1147 | if (! EQ (buf, XWINDOW (selected_window)->buffer) |
| 1148 | /* This line helps to fix Horsley's testbug.el bug. */ |
| 1149 | && !(WINDOWP (b->last_selected_window) |
| 1150 | && w != XWINDOW (b->last_selected_window) |
| 1151 | && EQ (buf, XWINDOW (b->last_selected_window)->buffer))) |
| 1152 | temp_set_point_both (b, |
| 1153 | clip_to_bounds (BUF_BEGV (b), |
| 1154 | XMARKER (w->pointm)->charpos, |
| 1155 | BUF_ZV (b)), |
| 1156 | clip_to_bounds (BUF_BEGV_BYTE (b), |
| 1157 | marker_byte_position (w->pointm), |
| 1158 | BUF_ZV_BYTE (b))); |
| 1159 | |
| 1160 | if (WINDOWP (b->last_selected_window) |
| 1161 | && w == XWINDOW (b->last_selected_window)) |
| 1162 | b->last_selected_window = Qnil; |
| 1163 | } |
| 1164 | |
| 1165 | /* Put replacement into the window structure in place of old. */ |
| 1166 | static void |
| 1167 | replace_window (old, replacement) |
| 1168 | Lisp_Object old, replacement; |
| 1169 | { |
| 1170 | register Lisp_Object tem; |
| 1171 | register struct window *o = XWINDOW (old), *p = XWINDOW (replacement); |
| 1172 | |
| 1173 | /* If OLD is its frame's root_window, then replacement is the new |
| 1174 | root_window for that frame. */ |
| 1175 | |
| 1176 | if (EQ (old, FRAME_ROOT_WINDOW (XFRAME (o->frame)))) |
| 1177 | FRAME_ROOT_WINDOW (XFRAME (o->frame)) = replacement; |
| 1178 | |
| 1179 | p->left = o->left; |
| 1180 | p->top = o->top; |
| 1181 | p->width = o->width; |
| 1182 | p->height = o->height; |
| 1183 | p->desired_matrix = p->current_matrix = 0; |
| 1184 | p->vscroll = 0; |
| 1185 | bzero (&p->cursor, sizeof (p->cursor)); |
| 1186 | bzero (&p->last_cursor, sizeof (p->last_cursor)); |
| 1187 | bzero (&p->phys_cursor, sizeof (p->phys_cursor)); |
| 1188 | p->phys_cursor_type = -1; |
| 1189 | p->phys_cursor_width = -1; |
| 1190 | p->must_be_updated_p = 0; |
| 1191 | p->pseudo_window_p = 0; |
| 1192 | XSETFASTINT (p->window_end_vpos, 0); |
| 1193 | XSETFASTINT (p->window_end_pos, 0); |
| 1194 | p->window_end_valid = Qnil; |
| 1195 | p->frozen_window_start_p = 0; |
| 1196 | p->orig_top = p->orig_height = Qnil; |
| 1197 | |
| 1198 | p->next = tem = o->next; |
| 1199 | if (!NILP (tem)) |
| 1200 | XWINDOW (tem)->prev = replacement; |
| 1201 | |
| 1202 | p->prev = tem = o->prev; |
| 1203 | if (!NILP (tem)) |
| 1204 | XWINDOW (tem)->next = replacement; |
| 1205 | |
| 1206 | p->parent = tem = o->parent; |
| 1207 | if (!NILP (tem)) |
| 1208 | { |
| 1209 | if (EQ (XWINDOW (tem)->vchild, old)) |
| 1210 | XWINDOW (tem)->vchild = replacement; |
| 1211 | if (EQ (XWINDOW (tem)->hchild, old)) |
| 1212 | XWINDOW (tem)->hchild = replacement; |
| 1213 | } |
| 1214 | |
| 1215 | /*** Here, if replacement is a vertical combination |
| 1216 | and so is its new parent, we should make replacement's |
| 1217 | children be children of that parent instead. ***/ |
| 1218 | } |
| 1219 | |
| 1220 | DEFUN ("delete-window", Fdelete_window, Sdelete_window, 0, 1, "", |
| 1221 | doc: /* Remove WINDOW from the display. Default is selected window. */) |
| 1222 | (window) |
| 1223 | register Lisp_Object window; |
| 1224 | { |
| 1225 | delete_window (window); |
| 1226 | |
| 1227 | if (! NILP (Vwindow_configuration_change_hook) |
| 1228 | && ! NILP (Vrun_hooks)) |
| 1229 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 1230 | |
| 1231 | return Qnil; |
| 1232 | } |
| 1233 | |
| 1234 | void |
| 1235 | delete_window (window) |
| 1236 | register Lisp_Object window; |
| 1237 | { |
| 1238 | register Lisp_Object tem, parent, sib; |
| 1239 | register struct window *p; |
| 1240 | register struct window *par; |
| 1241 | struct frame *f; |
| 1242 | |
| 1243 | /* Because this function is called by other C code on non-leaf |
| 1244 | windows, the CHECK_LIVE_WINDOW macro would choke inappropriately, |
| 1245 | so we can't decode_window here. */ |
| 1246 | if (NILP (window)) |
| 1247 | window = selected_window; |
| 1248 | else |
| 1249 | CHECK_WINDOW (window); |
| 1250 | p = XWINDOW (window); |
| 1251 | |
| 1252 | /* It's okay to delete an already-deleted window. */ |
| 1253 | if (NILP (p->buffer) |
| 1254 | && NILP (p->hchild) |
| 1255 | && NILP (p->vchild)) |
| 1256 | return; |
| 1257 | |
| 1258 | parent = p->parent; |
| 1259 | if (NILP (parent)) |
| 1260 | error ("Attempt to delete minibuffer or sole ordinary window"); |
| 1261 | par = XWINDOW (parent); |
| 1262 | |
| 1263 | windows_or_buffers_changed++; |
| 1264 | Vwindow_list = Qnil; |
| 1265 | f = XFRAME (WINDOW_FRAME (p)); |
| 1266 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 1267 | |
| 1268 | /* Are we trying to delete any frame's selected window? */ |
| 1269 | { |
| 1270 | Lisp_Object swindow, pwindow; |
| 1271 | |
| 1272 | /* See if the frame's selected window is either WINDOW |
| 1273 | or any subwindow of it, by finding all that window's parents |
| 1274 | and comparing each one with WINDOW. */ |
| 1275 | swindow = FRAME_SELECTED_WINDOW (f); |
| 1276 | |
| 1277 | while (1) |
| 1278 | { |
| 1279 | pwindow = swindow; |
| 1280 | while (!NILP (pwindow)) |
| 1281 | { |
| 1282 | if (EQ (window, pwindow)) |
| 1283 | break; |
| 1284 | pwindow = XWINDOW (pwindow)->parent; |
| 1285 | } |
| 1286 | |
| 1287 | /* If the window being deleted is not a parent of SWINDOW, |
| 1288 | then SWINDOW is ok as the new selected window. */ |
| 1289 | if (!EQ (window, pwindow)) |
| 1290 | break; |
| 1291 | /* Otherwise, try another window for SWINDOW. */ |
| 1292 | swindow = Fnext_window (swindow, Qlambda, Qnil);; |
| 1293 | |
| 1294 | /* If we get back to the frame's selected window, |
| 1295 | it means there was no acceptable alternative, |
| 1296 | so we cannot delete. */ |
| 1297 | if (EQ (swindow, FRAME_SELECTED_WINDOW (f))) |
| 1298 | error ("Cannot delete window"); |
| 1299 | } |
| 1300 | |
| 1301 | /* If we need to change SWINDOW, do it. */ |
| 1302 | if (! EQ (swindow, FRAME_SELECTED_WINDOW (f))) |
| 1303 | { |
| 1304 | /* If we're about to delete the selected window on the |
| 1305 | selected frame, then we should use Fselect_window to select |
| 1306 | the new window. On the other hand, if we're about to |
| 1307 | delete the selected window on any other frame, we shouldn't do |
| 1308 | anything but set the frame's selected_window slot. */ |
| 1309 | if (EQ (FRAME_SELECTED_WINDOW (f), selected_window)) |
| 1310 | Fselect_window (swindow); |
| 1311 | else |
| 1312 | FRAME_SELECTED_WINDOW (f) = swindow; |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | tem = p->buffer; |
| 1317 | /* tem is null for dummy parent windows |
| 1318 | (which have inferiors but not any contents themselves) */ |
| 1319 | if (!NILP (tem)) |
| 1320 | { |
| 1321 | unshow_buffer (p); |
| 1322 | unchain_marker (p->pointm); |
| 1323 | unchain_marker (p->start); |
| 1324 | } |
| 1325 | |
| 1326 | /* Free window glyph matrices. It is sure that they are allocated |
| 1327 | again when ADJUST_GLYPHS is called. Block input so that expose |
| 1328 | events and other events that access glyph matrices are not |
| 1329 | processed while we are changing them. */ |
| 1330 | BLOCK_INPUT; |
| 1331 | free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 1332 | |
| 1333 | tem = p->next; |
| 1334 | if (!NILP (tem)) |
| 1335 | XWINDOW (tem)->prev = p->prev; |
| 1336 | |
| 1337 | tem = p->prev; |
| 1338 | if (!NILP (tem)) |
| 1339 | XWINDOW (tem)->next = p->next; |
| 1340 | |
| 1341 | if (EQ (window, par->hchild)) |
| 1342 | par->hchild = p->next; |
| 1343 | if (EQ (window, par->vchild)) |
| 1344 | par->vchild = p->next; |
| 1345 | |
| 1346 | /* Find one of our siblings to give our space to. */ |
| 1347 | sib = p->prev; |
| 1348 | if (NILP (sib)) |
| 1349 | { |
| 1350 | /* If p gives its space to its next sibling, that sibling needs |
| 1351 | to have its top/left side pulled back to where p's is. |
| 1352 | set_window_{height,width} will re-position the sibling's |
| 1353 | children. */ |
| 1354 | sib = p->next; |
| 1355 | XWINDOW (sib)->top = p->top; |
| 1356 | XWINDOW (sib)->left = p->left; |
| 1357 | } |
| 1358 | |
| 1359 | /* Stretch that sibling. */ |
| 1360 | if (!NILP (par->vchild)) |
| 1361 | set_window_height (sib, |
| 1362 | XFASTINT (XWINDOW (sib)->height) + XFASTINT (p->height), |
| 1363 | 1); |
| 1364 | if (!NILP (par->hchild)) |
| 1365 | set_window_width (sib, |
| 1366 | XFASTINT (XWINDOW (sib)->width) + XFASTINT (p->width), |
| 1367 | 1); |
| 1368 | |
| 1369 | /* If parent now has only one child, |
| 1370 | put the child into the parent's place. */ |
| 1371 | tem = par->hchild; |
| 1372 | if (NILP (tem)) |
| 1373 | tem = par->vchild; |
| 1374 | if (NILP (XWINDOW (tem)->next)) |
| 1375 | replace_window (parent, tem); |
| 1376 | |
| 1377 | /* Since we may be deleting combination windows, we must make sure that |
| 1378 | not only p but all its children have been marked as deleted. */ |
| 1379 | if (! NILP (p->hchild)) |
| 1380 | delete_all_subwindows (XWINDOW (p->hchild)); |
| 1381 | else if (! NILP (p->vchild)) |
| 1382 | delete_all_subwindows (XWINDOW (p->vchild)); |
| 1383 | |
| 1384 | /* Mark this window as deleted. */ |
| 1385 | p->buffer = p->hchild = p->vchild = Qnil; |
| 1386 | |
| 1387 | /* Adjust glyph matrices. */ |
| 1388 | adjust_glyphs (f); |
| 1389 | UNBLOCK_INPUT; |
| 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | \f |
| 1394 | /*********************************************************************** |
| 1395 | Window List |
| 1396 | ***********************************************************************/ |
| 1397 | |
| 1398 | /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object |
| 1399 | pointer. This is a callback function for foreach_window, used in |
| 1400 | function window_list. */ |
| 1401 | |
| 1402 | static int |
| 1403 | add_window_to_list (w, user_data) |
| 1404 | struct window *w; |
| 1405 | void *user_data; |
| 1406 | { |
| 1407 | Lisp_Object *list = (Lisp_Object *) user_data; |
| 1408 | Lisp_Object window; |
| 1409 | XSETWINDOW (window, w); |
| 1410 | *list = Fcons (window, *list); |
| 1411 | return 1; |
| 1412 | } |
| 1413 | |
| 1414 | |
| 1415 | /* Return a list of all windows, for use by next_window. If |
| 1416 | Vwindow_list is a list, return that list. Otherwise, build a new |
| 1417 | list, cache it in Vwindow_list, and return that. */ |
| 1418 | |
| 1419 | static Lisp_Object |
| 1420 | window_list () |
| 1421 | { |
| 1422 | if (!CONSP (Vwindow_list)) |
| 1423 | { |
| 1424 | Lisp_Object tail; |
| 1425 | |
| 1426 | Vwindow_list = Qnil; |
| 1427 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
| 1428 | { |
| 1429 | Lisp_Object args[2]; |
| 1430 | |
| 1431 | /* We are visiting windows in canonical order, and add |
| 1432 | new windows at the front of args[1], which means we |
| 1433 | have to reverse this list at the end. */ |
| 1434 | args[1] = Qnil; |
| 1435 | foreach_window (XFRAME (XCAR (tail)), add_window_to_list, &args[1]); |
| 1436 | args[0] = Vwindow_list; |
| 1437 | args[1] = Fnreverse (args[1]); |
| 1438 | Vwindow_list = Fnconc (2, args); |
| 1439 | } |
| 1440 | } |
| 1441 | |
| 1442 | return Vwindow_list; |
| 1443 | } |
| 1444 | |
| 1445 | |
| 1446 | /* Value is non-zero if WINDOW satisfies the constraints given by |
| 1447 | OWINDOW, MINIBUF and ALL_FRAMES. |
| 1448 | |
| 1449 | MINIBUF t means WINDOW may be minibuffer windows. |
| 1450 | `lambda' means WINDOW may not be a minibuffer window. |
| 1451 | a window means a specific minibuffer window |
| 1452 | |
| 1453 | ALL_FRAMES t means search all frames, |
| 1454 | nil means search just current frame, |
| 1455 | `visible' means search just visible frames, |
| 1456 | 0 means search visible and iconified frames, |
| 1457 | a window means search the frame that window belongs to, |
| 1458 | a frame means consider windows on that frame, only. */ |
| 1459 | |
| 1460 | static int |
| 1461 | candidate_window_p (window, owindow, minibuf, all_frames) |
| 1462 | Lisp_Object window, owindow, minibuf, all_frames; |
| 1463 | { |
| 1464 | struct window *w = XWINDOW (window); |
| 1465 | struct frame *f = XFRAME (w->frame); |
| 1466 | int candidate_p = 1; |
| 1467 | |
| 1468 | if (!BUFFERP (w->buffer)) |
| 1469 | candidate_p = 0; |
| 1470 | else if (MINI_WINDOW_P (w) |
| 1471 | && (EQ (minibuf, Qlambda) |
| 1472 | || (WINDOWP (minibuf) && !EQ (minibuf, window)))) |
| 1473 | { |
| 1474 | /* If MINIBUF is `lambda' don't consider any mini-windows. |
| 1475 | If it is a window, consider only that one. */ |
| 1476 | candidate_p = 0; |
| 1477 | } |
| 1478 | else if (EQ (all_frames, Qt)) |
| 1479 | candidate_p = 1; |
| 1480 | else if (NILP (all_frames)) |
| 1481 | { |
| 1482 | xassert (WINDOWP (owindow)); |
| 1483 | candidate_p = EQ (w->frame, XWINDOW (owindow)->frame); |
| 1484 | } |
| 1485 | else if (EQ (all_frames, Qvisible)) |
| 1486 | { |
| 1487 | FRAME_SAMPLE_VISIBILITY (f); |
| 1488 | candidate_p = FRAME_VISIBLE_P (f); |
| 1489 | } |
| 1490 | else if (INTEGERP (all_frames) && XINT (all_frames) == 0) |
| 1491 | { |
| 1492 | FRAME_SAMPLE_VISIBILITY (f); |
| 1493 | candidate_p = FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f); |
| 1494 | } |
| 1495 | else if (WINDOWP (all_frames)) |
| 1496 | candidate_p = (EQ (FRAME_MINIBUF_WINDOW (f), all_frames) |
| 1497 | || EQ (XWINDOW (all_frames)->frame, w->frame) |
| 1498 | || EQ (XWINDOW (all_frames)->frame, FRAME_FOCUS_FRAME (f))); |
| 1499 | else if (FRAMEP (all_frames)) |
| 1500 | candidate_p = EQ (all_frames, w->frame); |
| 1501 | |
| 1502 | return candidate_p; |
| 1503 | } |
| 1504 | |
| 1505 | |
| 1506 | /* Decode arguments as allowed by Fnext_window, Fprevious_window, and |
| 1507 | Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and |
| 1508 | ALL_FRAMES. */ |
| 1509 | |
| 1510 | static void |
| 1511 | decode_next_window_args (window, minibuf, all_frames) |
| 1512 | Lisp_Object *window, *minibuf, *all_frames; |
| 1513 | { |
| 1514 | if (NILP (*window)) |
| 1515 | *window = selected_window; |
| 1516 | else |
| 1517 | CHECK_LIVE_WINDOW (*window); |
| 1518 | |
| 1519 | /* MINIBUF nil may or may not include minibuffers. Decide if it |
| 1520 | does. */ |
| 1521 | if (NILP (*minibuf)) |
| 1522 | *minibuf = minibuf_level ? minibuf_window : Qlambda; |
| 1523 | else if (!EQ (*minibuf, Qt)) |
| 1524 | *minibuf = Qlambda; |
| 1525 | |
| 1526 | /* Now *MINIBUF can be t => count all minibuffer windows, `lambda' |
| 1527 | => count none of them, or a specific minibuffer window (the |
| 1528 | active one) to count. */ |
| 1529 | |
| 1530 | /* ALL_FRAMES nil doesn't specify which frames to include. */ |
| 1531 | if (NILP (*all_frames)) |
| 1532 | *all_frames = (!EQ (*minibuf, Qlambda) |
| 1533 | ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window)->frame)) |
| 1534 | : Qnil); |
| 1535 | else if (EQ (*all_frames, Qvisible)) |
| 1536 | ; |
| 1537 | else if (XFASTINT (*all_frames) == 0) |
| 1538 | ; |
| 1539 | else if (FRAMEP (*all_frames)) |
| 1540 | ; |
| 1541 | else if (!EQ (*all_frames, Qt)) |
| 1542 | *all_frames = Qnil; |
| 1543 | |
| 1544 | /* Now *ALL_FRAMES is t meaning search all frames, nil meaning |
| 1545 | search just current frame, `visible' meaning search just visible |
| 1546 | frames, 0 meaning search visible and iconified frames, or a |
| 1547 | window, meaning search the frame that window belongs to, or a |
| 1548 | frame, meaning consider windows on that frame, only. */ |
| 1549 | } |
| 1550 | |
| 1551 | |
| 1552 | /* Return the next or previous window of WINDOW in canonical ordering |
| 1553 | of windows. NEXT_P non-zero means return the next window. See the |
| 1554 | documentation string of next-window for the meaning of MINIBUF and |
| 1555 | ALL_FRAMES. */ |
| 1556 | |
| 1557 | static Lisp_Object |
| 1558 | next_window (window, minibuf, all_frames, next_p) |
| 1559 | Lisp_Object window, minibuf, all_frames; |
| 1560 | int next_p; |
| 1561 | { |
| 1562 | decode_next_window_args (&window, &minibuf, &all_frames); |
| 1563 | |
| 1564 | /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just |
| 1565 | return the first window on the frame. */ |
| 1566 | if (FRAMEP (all_frames) |
| 1567 | && !EQ (all_frames, XWINDOW (window)->frame)) |
| 1568 | return Fframe_first_window (all_frames); |
| 1569 | |
| 1570 | if (next_p) |
| 1571 | { |
| 1572 | Lisp_Object list; |
| 1573 | |
| 1574 | /* Find WINDOW in the list of all windows. */ |
| 1575 | list = Fmemq (window, window_list ()); |
| 1576 | |
| 1577 | /* Scan forward from WINDOW to the end of the window list. */ |
| 1578 | if (CONSP (list)) |
| 1579 | for (list = XCDR (list); CONSP (list); list = XCDR (list)) |
| 1580 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
| 1581 | break; |
| 1582 | |
| 1583 | /* Scan from the start of the window list up to WINDOW. */ |
| 1584 | if (!CONSP (list)) |
| 1585 | for (list = Vwindow_list; |
| 1586 | CONSP (list) && !EQ (XCAR (list), window); |
| 1587 | list = XCDR (list)) |
| 1588 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
| 1589 | break; |
| 1590 | |
| 1591 | if (CONSP (list)) |
| 1592 | window = XCAR (list); |
| 1593 | } |
| 1594 | else |
| 1595 | { |
| 1596 | Lisp_Object candidate, list; |
| 1597 | |
| 1598 | /* Scan through the list of windows for candidates. If there are |
| 1599 | candidate windows in front of WINDOW, the last one of these |
| 1600 | is the one we want. If there are candidates following WINDOW |
| 1601 | in the list, again the last one of these is the one we want. */ |
| 1602 | candidate = Qnil; |
| 1603 | for (list = window_list (); CONSP (list); list = XCDR (list)) |
| 1604 | { |
| 1605 | if (EQ (XCAR (list), window)) |
| 1606 | { |
| 1607 | if (WINDOWP (candidate)) |
| 1608 | break; |
| 1609 | } |
| 1610 | else if (candidate_window_p (XCAR (list), window, minibuf, |
| 1611 | all_frames)) |
| 1612 | candidate = XCAR (list); |
| 1613 | } |
| 1614 | |
| 1615 | if (WINDOWP (candidate)) |
| 1616 | window = candidate; |
| 1617 | } |
| 1618 | |
| 1619 | return window; |
| 1620 | } |
| 1621 | |
| 1622 | |
| 1623 | DEFUN ("next-window", Fnext_window, Snext_window, 0, 3, 0, |
| 1624 | doc: /* Return next window after WINDOW in canonical ordering of windows. |
| 1625 | If omitted, WINDOW defaults to the selected window. |
| 1626 | |
| 1627 | Optional second arg MINIBUF t means count the minibuffer window even |
| 1628 | if not active. MINIBUF nil or omitted means count the minibuffer iff |
| 1629 | it is active. MINIBUF neither t nor nil means not to count the |
| 1630 | minibuffer even if it is active. |
| 1631 | |
| 1632 | Several frames may share a single minibuffer; if the minibuffer |
| 1633 | counts, all windows on all frames that share that minibuffer count |
| 1634 | too. Therefore, `next-window' can be used to iterate through the |
| 1635 | set of windows even when the minibuffer is on another frame. If the |
| 1636 | minibuffer does not count, only windows from WINDOW's frame count. |
| 1637 | |
| 1638 | Optional third arg ALL-FRAMES t means include windows on all frames. |
| 1639 | ALL-FRAMES nil or omitted means cycle within the frames as specified |
| 1640 | above. ALL-FRAMES = `visible' means include windows on all visible frames. |
| 1641 | ALL-FRAMES = 0 means include windows on all visible and iconified frames. |
| 1642 | If ALL-FRAMES is a frame, restrict search to windows on that frame. |
| 1643 | Anything else means restrict to WINDOW's frame. |
| 1644 | |
| 1645 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use |
| 1646 | `next-window' to iterate through the entire cycle of acceptable |
| 1647 | windows, eventually ending up back at the window you started with. |
| 1648 | `previous-window' traverses the same cycle, in the reverse order. */) |
| 1649 | (window, minibuf, all_frames) |
| 1650 | Lisp_Object window, minibuf, all_frames; |
| 1651 | { |
| 1652 | return next_window (window, minibuf, all_frames, 1); |
| 1653 | } |
| 1654 | |
| 1655 | |
| 1656 | DEFUN ("previous-window", Fprevious_window, Sprevious_window, 0, 3, 0, |
| 1657 | doc: /* Return the window preceding WINDOW in canonical ordering of windows. |
| 1658 | If omitted, WINDOW defaults to the selected window. |
| 1659 | |
| 1660 | Optional second arg MINIBUF t means count the minibuffer window even |
| 1661 | if not active. MINIBUF nil or omitted means count the minibuffer iff |
| 1662 | it is active. MINIBUF neither t nor nil means not to count the |
| 1663 | minibuffer even if it is active. |
| 1664 | |
| 1665 | Several frames may share a single minibuffer; if the minibuffer |
| 1666 | counts, all windows on all frames that share that minibuffer count |
| 1667 | too. Therefore, `previous-window' can be used to iterate through |
| 1668 | the set of windows even when the minibuffer is on another frame. If |
| 1669 | the minibuffer does not count, only windows from WINDOW's frame count |
| 1670 | |
| 1671 | Optional third arg ALL-FRAMES t means include windows on all frames. |
| 1672 | ALL-FRAMES nil or omitted means cycle within the frames as specified |
| 1673 | above. ALL-FRAMES = `visible' means include windows on all visible frames. |
| 1674 | ALL-FRAMES = 0 means include windows on all visible and iconified frames. |
| 1675 | If ALL-FRAMES is a frame, restrict search to windows on that frame. |
| 1676 | Anything else means restrict to WINDOW's frame. |
| 1677 | |
| 1678 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use |
| 1679 | `previous-window' to iterate through the entire cycle of acceptable |
| 1680 | windows, eventually ending up back at the window you started with. |
| 1681 | `next-window' traverses the same cycle, in the reverse order. */) |
| 1682 | (window, minibuf, all_frames) |
| 1683 | Lisp_Object window, minibuf, all_frames; |
| 1684 | { |
| 1685 | return next_window (window, minibuf, all_frames, 0); |
| 1686 | } |
| 1687 | |
| 1688 | |
| 1689 | DEFUN ("other-window", Fother_window, Sother_window, 1, 2, "p", |
| 1690 | doc: /* Select the ARG'th different window on this frame. |
| 1691 | All windows on current frame are arranged in a cyclic order. |
| 1692 | This command selects the window ARG steps away in that order. |
| 1693 | A negative ARG moves in the opposite order. If the optional second |
| 1694 | argument ALL_FRAMES is non-nil, cycle through all frames. */) |
| 1695 | (arg, all_frames) |
| 1696 | Lisp_Object arg, all_frames; |
| 1697 | { |
| 1698 | Lisp_Object window; |
| 1699 | int i; |
| 1700 | |
| 1701 | CHECK_NUMBER (arg); |
| 1702 | window = selected_window; |
| 1703 | |
| 1704 | for (i = XINT (arg); i > 0; --i) |
| 1705 | window = Fnext_window (window, Qnil, all_frames); |
| 1706 | for (; i < 0; ++i) |
| 1707 | window = Fprevious_window (window, Qnil, all_frames); |
| 1708 | |
| 1709 | Fselect_window (window); |
| 1710 | return Qnil; |
| 1711 | } |
| 1712 | |
| 1713 | |
| 1714 | DEFUN ("window-list", Fwindow_list, Swindow_list, 0, 3, 0, |
| 1715 | doc: /* Return a list of windows on FRAME, starting with WINDOW. |
| 1716 | FRAME nil or omitted means use the selected frame. |
| 1717 | WINDOW nil or omitted means use the selected window. |
| 1718 | MINIBUF t means include the minibuffer window, even if it isn't active. |
| 1719 | MINIBUF nil or omitted means include the minibuffer window only |
| 1720 | if it's active. |
| 1721 | MINIBUF neither nil nor t means never include the minibuffer window. */) |
| 1722 | (frame, minibuf, window) |
| 1723 | Lisp_Object frame, minibuf, window; |
| 1724 | { |
| 1725 | if (NILP (window)) |
| 1726 | window = selected_window; |
| 1727 | if (NILP (frame)) |
| 1728 | frame = selected_frame; |
| 1729 | |
| 1730 | if (!EQ (frame, XWINDOW (window)->frame)) |
| 1731 | error ("Window is on a different frame"); |
| 1732 | |
| 1733 | return window_list_1 (window, minibuf, frame); |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | /* Return a list of windows in canonical ordering. Arguments are like |
| 1738 | for `next-window'. */ |
| 1739 | |
| 1740 | static Lisp_Object |
| 1741 | window_list_1 (window, minibuf, all_frames) |
| 1742 | Lisp_Object window, minibuf, all_frames; |
| 1743 | { |
| 1744 | Lisp_Object tail, list; |
| 1745 | |
| 1746 | decode_next_window_args (&window, &minibuf, &all_frames); |
| 1747 | list = Qnil; |
| 1748 | |
| 1749 | for (tail = window_list (); CONSP (tail); tail = XCDR (tail)) |
| 1750 | if (candidate_window_p (XCAR (tail), window, minibuf, all_frames)) |
| 1751 | list = Fcons (XCAR (tail), list); |
| 1752 | |
| 1753 | return Fnreverse (list); |
| 1754 | } |
| 1755 | |
| 1756 | |
| 1757 | \f |
| 1758 | /* Look at all windows, performing an operation specified by TYPE |
| 1759 | with argument OBJ. |
| 1760 | If FRAMES is Qt, look at all frames; |
| 1761 | Qnil, look at just the selected frame; |
| 1762 | Qvisible, look at visible frames; |
| 1763 | a frame, just look at windows on that frame. |
| 1764 | If MINI is non-zero, perform the operation on minibuffer windows too. */ |
| 1765 | |
| 1766 | enum window_loop |
| 1767 | { |
| 1768 | WINDOW_LOOP_UNUSED, |
| 1769 | GET_BUFFER_WINDOW, /* Arg is buffer */ |
| 1770 | GET_LRU_WINDOW, /* Arg is t for full-width windows only */ |
| 1771 | DELETE_OTHER_WINDOWS, /* Arg is window not to delete */ |
| 1772 | DELETE_BUFFER_WINDOWS, /* Arg is buffer */ |
| 1773 | GET_LARGEST_WINDOW, |
| 1774 | UNSHOW_BUFFER, /* Arg is buffer */ |
| 1775 | CHECK_ALL_WINDOWS |
| 1776 | }; |
| 1777 | |
| 1778 | static Lisp_Object |
| 1779 | window_loop (type, obj, mini, frames) |
| 1780 | enum window_loop type; |
| 1781 | Lisp_Object obj, frames; |
| 1782 | int mini; |
| 1783 | { |
| 1784 | Lisp_Object window, windows, best_window, frame_arg; |
| 1785 | struct frame *f; |
| 1786 | struct gcpro gcpro1; |
| 1787 | |
| 1788 | /* If we're only looping through windows on a particular frame, |
| 1789 | frame points to that frame. If we're looping through windows |
| 1790 | on all frames, frame is 0. */ |
| 1791 | if (FRAMEP (frames)) |
| 1792 | f = XFRAME (frames); |
| 1793 | else if (NILP (frames)) |
| 1794 | f = SELECTED_FRAME (); |
| 1795 | else |
| 1796 | f = NULL; |
| 1797 | |
| 1798 | if (f) |
| 1799 | frame_arg = Qlambda; |
| 1800 | else if (XFASTINT (frames) == 0) |
| 1801 | frame_arg = frames; |
| 1802 | else if (EQ (frames, Qvisible)) |
| 1803 | frame_arg = frames; |
| 1804 | else |
| 1805 | frame_arg = Qt; |
| 1806 | |
| 1807 | /* frame_arg is Qlambda to stick to one frame, |
| 1808 | Qvisible to consider all visible frames, |
| 1809 | or Qt otherwise. */ |
| 1810 | |
| 1811 | /* Pick a window to start with. */ |
| 1812 | if (WINDOWP (obj)) |
| 1813 | window = obj; |
| 1814 | else if (f) |
| 1815 | window = FRAME_SELECTED_WINDOW (f); |
| 1816 | else |
| 1817 | window = FRAME_SELECTED_WINDOW (SELECTED_FRAME ()); |
| 1818 | |
| 1819 | windows = window_list_1 (window, mini ? Qt : Qnil, frame_arg); |
| 1820 | GCPRO1 (windows); |
| 1821 | best_window = Qnil; |
| 1822 | |
| 1823 | for (; CONSP (windows); windows = CDR (windows)) |
| 1824 | { |
| 1825 | struct window *w; |
| 1826 | |
| 1827 | window = XCAR (windows); |
| 1828 | w = XWINDOW (window); |
| 1829 | |
| 1830 | /* Note that we do not pay attention here to whether the frame |
| 1831 | is visible, since Fwindow_list skips non-visible frames if |
| 1832 | that is desired, under the control of frame_arg. */ |
| 1833 | if (!MINI_WINDOW_P (w) |
| 1834 | /* For UNSHOW_BUFFER, we must always consider all windows. */ |
| 1835 | || type == UNSHOW_BUFFER |
| 1836 | || (mini && minibuf_level > 0)) |
| 1837 | switch (type) |
| 1838 | { |
| 1839 | case GET_BUFFER_WINDOW: |
| 1840 | if (EQ (w->buffer, obj) |
| 1841 | /* Don't find any minibuffer window |
| 1842 | except the one that is currently in use. */ |
| 1843 | && (MINI_WINDOW_P (w) |
| 1844 | ? EQ (window, minibuf_window) |
| 1845 | : 1)) |
| 1846 | { |
| 1847 | if (NILP (best_window)) |
| 1848 | best_window = window; |
| 1849 | else if (EQ (window, selected_window)) |
| 1850 | /* For compatibility with 20.x, prefer to return |
| 1851 | selected-window. */ |
| 1852 | best_window = window; |
| 1853 | } |
| 1854 | break; |
| 1855 | |
| 1856 | case GET_LRU_WINDOW: |
| 1857 | /* t as arg means consider only full-width windows */ |
| 1858 | if (!NILP (obj) && !WINDOW_FULL_WIDTH_P (w)) |
| 1859 | break; |
| 1860 | /* Ignore dedicated windows and minibuffers. */ |
| 1861 | if (MINI_WINDOW_P (w) || !NILP (w->dedicated)) |
| 1862 | break; |
| 1863 | if (NILP (best_window) |
| 1864 | || (XFASTINT (XWINDOW (best_window)->use_time) |
| 1865 | > XFASTINT (w->use_time))) |
| 1866 | best_window = window; |
| 1867 | break; |
| 1868 | |
| 1869 | case DELETE_OTHER_WINDOWS: |
| 1870 | if (!EQ (window, obj)) |
| 1871 | Fdelete_window (window); |
| 1872 | break; |
| 1873 | |
| 1874 | case DELETE_BUFFER_WINDOWS: |
| 1875 | if (EQ (w->buffer, obj)) |
| 1876 | { |
| 1877 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 1878 | |
| 1879 | /* If this window is dedicated, and in a frame of its own, |
| 1880 | kill the frame. */ |
| 1881 | if (EQ (window, FRAME_ROOT_WINDOW (f)) |
| 1882 | && !NILP (w->dedicated) |
| 1883 | && other_visible_frames (f)) |
| 1884 | { |
| 1885 | /* Skip the other windows on this frame. |
| 1886 | There might be one, the minibuffer! */ |
| 1887 | while (CONSP (XCDR (windows)) |
| 1888 | && EQ (XWINDOW (XCAR (windows))->frame, |
| 1889 | XWINDOW (XCAR (XCDR (windows)))->frame)) |
| 1890 | windows = XCDR (windows); |
| 1891 | |
| 1892 | /* Now we can safely delete the frame. */ |
| 1893 | Fdelete_frame (w->frame, Qnil); |
| 1894 | } |
| 1895 | else if (NILP (w->parent)) |
| 1896 | { |
| 1897 | /* If we're deleting the buffer displayed in the |
| 1898 | only window on the frame, find a new buffer to |
| 1899 | display there. */ |
| 1900 | Lisp_Object buffer; |
| 1901 | buffer = Fother_buffer (obj, Qnil, w->frame); |
| 1902 | Fset_window_buffer (window, buffer); |
| 1903 | if (EQ (window, selected_window)) |
| 1904 | Fset_buffer (w->buffer); |
| 1905 | } |
| 1906 | else |
| 1907 | Fdelete_window (window); |
| 1908 | } |
| 1909 | break; |
| 1910 | |
| 1911 | case GET_LARGEST_WINDOW: |
| 1912 | { |
| 1913 | /* Ignore dedicated windows and minibuffers. */ |
| 1914 | if (MINI_WINDOW_P (w) || !NILP (w->dedicated)) |
| 1915 | break; |
| 1916 | |
| 1917 | if (NILP (best_window)) |
| 1918 | best_window = window; |
| 1919 | else |
| 1920 | { |
| 1921 | struct window *b = XWINDOW (best_window); |
| 1922 | if (XFASTINT (w->height) * XFASTINT (w->width) |
| 1923 | > XFASTINT (b->height) * XFASTINT (b->width)) |
| 1924 | best_window = window; |
| 1925 | } |
| 1926 | } |
| 1927 | break; |
| 1928 | |
| 1929 | case UNSHOW_BUFFER: |
| 1930 | if (EQ (w->buffer, obj)) |
| 1931 | { |
| 1932 | Lisp_Object buffer; |
| 1933 | struct frame *f = XFRAME (w->frame); |
| 1934 | |
| 1935 | /* Find another buffer to show in this window. */ |
| 1936 | buffer = Fother_buffer (obj, Qnil, w->frame); |
| 1937 | |
| 1938 | /* If this window is dedicated, and in a frame of its own, |
| 1939 | kill the frame. */ |
| 1940 | if (EQ (window, FRAME_ROOT_WINDOW (f)) |
| 1941 | && !NILP (w->dedicated) |
| 1942 | && other_visible_frames (f)) |
| 1943 | { |
| 1944 | /* Skip the other windows on this frame. |
| 1945 | There might be one, the minibuffer! */ |
| 1946 | while (CONSP (XCDR (windows)) |
| 1947 | && EQ (XWINDOW (XCAR (windows))->frame, |
| 1948 | XWINDOW (XCAR (XCDR (windows)))->frame)) |
| 1949 | windows = XCDR (windows); |
| 1950 | |
| 1951 | /* Now we can safely delete the frame. */ |
| 1952 | Fdelete_frame (w->frame, Qnil); |
| 1953 | } |
| 1954 | else |
| 1955 | { |
| 1956 | /* Otherwise show a different buffer in the window. */ |
| 1957 | w->dedicated = Qnil; |
| 1958 | Fset_window_buffer (window, buffer); |
| 1959 | if (EQ (window, selected_window)) |
| 1960 | Fset_buffer (w->buffer); |
| 1961 | } |
| 1962 | } |
| 1963 | break; |
| 1964 | |
| 1965 | /* Check for a window that has a killed buffer. */ |
| 1966 | case CHECK_ALL_WINDOWS: |
| 1967 | if (! NILP (w->buffer) |
| 1968 | && NILP (XBUFFER (w->buffer)->name)) |
| 1969 | abort (); |
| 1970 | break; |
| 1971 | |
| 1972 | case WINDOW_LOOP_UNUSED: |
| 1973 | break; |
| 1974 | } |
| 1975 | } |
| 1976 | |
| 1977 | UNGCPRO; |
| 1978 | return best_window; |
| 1979 | } |
| 1980 | |
| 1981 | /* Used for debugging. Abort if any window has a dead buffer. */ |
| 1982 | |
| 1983 | void |
| 1984 | check_all_windows () |
| 1985 | { |
| 1986 | window_loop (CHECK_ALL_WINDOWS, Qnil, 1, Qt); |
| 1987 | } |
| 1988 | |
| 1989 | DEFUN ("get-lru-window", Fget_lru_window, Sget_lru_window, 0, 1, 0, |
| 1990 | doc: /* Return the window least recently selected or used for display. |
| 1991 | If optional argument FRAME is `visible', search all visible frames. |
| 1992 | If FRAME is 0, search all visible and iconified frames. |
| 1993 | If FRAME is t, search all frames. |
| 1994 | If FRAME is nil, search only the selected frame. |
| 1995 | If FRAME is a frame, search only that frame. */) |
| 1996 | (frame) |
| 1997 | Lisp_Object frame; |
| 1998 | { |
| 1999 | register Lisp_Object w; |
| 2000 | /* First try for a window that is full-width */ |
| 2001 | w = window_loop (GET_LRU_WINDOW, Qt, 0, frame); |
| 2002 | if (!NILP (w) && !EQ (w, selected_window)) |
| 2003 | return w; |
| 2004 | /* If none of them, try the rest */ |
| 2005 | return window_loop (GET_LRU_WINDOW, Qnil, 0, frame); |
| 2006 | } |
| 2007 | |
| 2008 | DEFUN ("get-largest-window", Fget_largest_window, Sget_largest_window, 0, 1, 0, |
| 2009 | doc: /* Return the largest window in area. |
| 2010 | If optional argument FRAME is `visible', search all visible frames. |
| 2011 | If FRAME is 0, search all visible and iconified frames. |
| 2012 | If FRAME is t, search all frames. |
| 2013 | If FRAME is nil, search only the selected frame. |
| 2014 | If FRAME is a frame, search only that frame. */) |
| 2015 | (frame) |
| 2016 | Lisp_Object frame; |
| 2017 | { |
| 2018 | return window_loop (GET_LARGEST_WINDOW, Qnil, 0, |
| 2019 | frame); |
| 2020 | } |
| 2021 | |
| 2022 | DEFUN ("get-buffer-window", Fget_buffer_window, Sget_buffer_window, 1, 2, 0, |
| 2023 | doc: /* Return a window currently displaying BUFFER, or nil if none. |
| 2024 | If optional argument FRAME is `visible', search all visible frames. |
| 2025 | If optional argument FRAME is 0, search all visible and iconified frames. |
| 2026 | If FRAME is t, search all frames. |
| 2027 | If FRAME is nil, search only the selected frame. |
| 2028 | If FRAME is a frame, search only that frame. */) |
| 2029 | (buffer, frame) |
| 2030 | Lisp_Object buffer, frame; |
| 2031 | { |
| 2032 | buffer = Fget_buffer (buffer); |
| 2033 | if (BUFFERP (buffer)) |
| 2034 | return window_loop (GET_BUFFER_WINDOW, buffer, 1, frame); |
| 2035 | else |
| 2036 | return Qnil; |
| 2037 | } |
| 2038 | |
| 2039 | DEFUN ("delete-other-windows", Fdelete_other_windows, Sdelete_other_windows, |
| 2040 | 0, 1, "", |
| 2041 | doc: /* Make WINDOW (or the selected window) fill its frame. |
| 2042 | Only the frame WINDOW is on is affected. |
| 2043 | This function tries to reduce display jumps |
| 2044 | by keeping the text previously visible in WINDOW |
| 2045 | in the same place on the frame. Doing this depends on |
| 2046 | the value of (window-start WINDOW), so if calling this function |
| 2047 | in a program gives strange scrolling, make sure the window-start |
| 2048 | value is reasonable when this function is called. */) |
| 2049 | (window) |
| 2050 | Lisp_Object window; |
| 2051 | { |
| 2052 | struct window *w; |
| 2053 | int startpos; |
| 2054 | int top, new_top; |
| 2055 | |
| 2056 | if (NILP (window)) |
| 2057 | window = selected_window; |
| 2058 | else |
| 2059 | CHECK_LIVE_WINDOW (window); |
| 2060 | w = XWINDOW (window); |
| 2061 | |
| 2062 | startpos = marker_position (w->start); |
| 2063 | top = XFASTINT (w->top) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
| 2064 | |
| 2065 | if (MINI_WINDOW_P (w) && top > 0) |
| 2066 | error ("Can't expand minibuffer to full frame"); |
| 2067 | |
| 2068 | window_loop (DELETE_OTHER_WINDOWS, window, 0, WINDOW_FRAME (w)); |
| 2069 | |
| 2070 | /* Try to minimize scrolling, by setting the window start to the point |
| 2071 | will cause the text at the old window start to be at the same place |
| 2072 | on the frame. But don't try to do this if the window start is |
| 2073 | outside the visible portion (as might happen when the display is |
| 2074 | not current, due to typeahead). */ |
| 2075 | new_top = XFASTINT (w->top) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
| 2076 | if (new_top != top |
| 2077 | && startpos >= BUF_BEGV (XBUFFER (w->buffer)) |
| 2078 | && startpos <= BUF_ZV (XBUFFER (w->buffer))) |
| 2079 | { |
| 2080 | struct position pos; |
| 2081 | struct buffer *obuf = current_buffer; |
| 2082 | |
| 2083 | Fset_buffer (w->buffer); |
| 2084 | /* This computation used to temporarily move point, but that can |
| 2085 | have unwanted side effects due to text properties. */ |
| 2086 | pos = *vmotion (startpos, -top, w); |
| 2087 | |
| 2088 | set_marker_both (w->start, w->buffer, pos.bufpos, pos.bytepos); |
| 2089 | w->window_end_valid = Qnil; |
| 2090 | w->start_at_line_beg = ((pos.bytepos == BEGV_BYTE |
| 2091 | || FETCH_BYTE (pos.bytepos - 1) == '\n') ? Qt |
| 2092 | : Qnil); |
| 2093 | /* We need to do this, so that the window-scroll-functions |
| 2094 | get called. */ |
| 2095 | w->optional_new_start = Qt; |
| 2096 | |
| 2097 | set_buffer_internal (obuf); |
| 2098 | } |
| 2099 | |
| 2100 | return Qnil; |
| 2101 | } |
| 2102 | |
| 2103 | DEFUN ("delete-windows-on", Fdelete_windows_on, Sdelete_windows_on, |
| 2104 | 1, 2, "bDelete windows on (buffer): ", |
| 2105 | doc: /* Delete all windows showing BUFFER. |
| 2106 | Optional second argument FRAME controls which frames are affected. |
| 2107 | If optional argument FRAME is `visible', search all visible frames. |
| 2108 | If FRAME is 0, search all visible and iconified frames. |
| 2109 | If FRAME is nil, search all frames. |
| 2110 | If FRAME is t, search only the selected frame. |
| 2111 | If FRAME is a frame, search only that frame. */) |
| 2112 | (buffer, frame) |
| 2113 | Lisp_Object buffer, frame; |
| 2114 | { |
| 2115 | /* FRAME uses t and nil to mean the opposite of what window_loop |
| 2116 | expects. */ |
| 2117 | if (NILP (frame)) |
| 2118 | frame = Qt; |
| 2119 | else if (EQ (frame, Qt)) |
| 2120 | frame = Qnil; |
| 2121 | |
| 2122 | if (!NILP (buffer)) |
| 2123 | { |
| 2124 | buffer = Fget_buffer (buffer); |
| 2125 | CHECK_BUFFER (buffer); |
| 2126 | window_loop (DELETE_BUFFER_WINDOWS, buffer, 0, frame); |
| 2127 | } |
| 2128 | |
| 2129 | return Qnil; |
| 2130 | } |
| 2131 | |
| 2132 | DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows, |
| 2133 | Sreplace_buffer_in_windows, |
| 2134 | 1, 1, "bReplace buffer in windows: ", |
| 2135 | doc: /* Replace BUFFER with some other buffer in all windows showing it. */) |
| 2136 | (buffer) |
| 2137 | Lisp_Object buffer; |
| 2138 | { |
| 2139 | if (!NILP (buffer)) |
| 2140 | { |
| 2141 | buffer = Fget_buffer (buffer); |
| 2142 | CHECK_BUFFER (buffer); |
| 2143 | window_loop (UNSHOW_BUFFER, buffer, 0, Qt); |
| 2144 | } |
| 2145 | return Qnil; |
| 2146 | } |
| 2147 | |
| 2148 | /* Replace BUFFER with some other buffer in all windows |
| 2149 | of all frames, even those on other keyboards. */ |
| 2150 | |
| 2151 | void |
| 2152 | replace_buffer_in_all_windows (buffer) |
| 2153 | Lisp_Object buffer; |
| 2154 | { |
| 2155 | #ifdef MULTI_KBOARD |
| 2156 | Lisp_Object tail, frame; |
| 2157 | |
| 2158 | /* A single call to window_loop won't do the job |
| 2159 | because it only considers frames on the current keyboard. |
| 2160 | So loop manually over frames, and handle each one. */ |
| 2161 | FOR_EACH_FRAME (tail, frame) |
| 2162 | window_loop (UNSHOW_BUFFER, buffer, 1, frame); |
| 2163 | #else |
| 2164 | window_loop (UNSHOW_BUFFER, buffer, 1, Qt); |
| 2165 | #endif |
| 2166 | } |
| 2167 | \f |
| 2168 | /* Set the height of WINDOW and all its inferiors. */ |
| 2169 | |
| 2170 | /* The smallest acceptable dimensions for a window. Anything smaller |
| 2171 | might crash Emacs. */ |
| 2172 | |
| 2173 | #define MIN_SAFE_WINDOW_WIDTH (2) |
| 2174 | #define MIN_SAFE_WINDOW_HEIGHT (1) |
| 2175 | |
| 2176 | /* Make sure that window_min_height and window_min_width are |
| 2177 | not too small; if they are, set them to safe minima. */ |
| 2178 | |
| 2179 | static void |
| 2180 | check_min_window_sizes () |
| 2181 | { |
| 2182 | /* Smaller values might permit a crash. */ |
| 2183 | if (window_min_width < MIN_SAFE_WINDOW_WIDTH) |
| 2184 | window_min_width = MIN_SAFE_WINDOW_WIDTH; |
| 2185 | if (window_min_height < MIN_SAFE_WINDOW_HEIGHT) |
| 2186 | window_min_height = MIN_SAFE_WINDOW_HEIGHT; |
| 2187 | } |
| 2188 | |
| 2189 | /* If *ROWS or *COLS are too small a size for FRAME, set them to the |
| 2190 | minimum allowable size. */ |
| 2191 | |
| 2192 | void |
| 2193 | check_frame_size (frame, rows, cols) |
| 2194 | FRAME_PTR frame; |
| 2195 | int *rows, *cols; |
| 2196 | { |
| 2197 | /* For height, we have to see: |
| 2198 | how many windows the frame has at minimum (one or two), |
| 2199 | and whether it has a menu bar or other special stuff at the top. */ |
| 2200 | int min_height |
| 2201 | = ((FRAME_MINIBUF_ONLY_P (frame) || ! FRAME_HAS_MINIBUF_P (frame)) |
| 2202 | ? MIN_SAFE_WINDOW_HEIGHT |
| 2203 | : 2 * MIN_SAFE_WINDOW_HEIGHT); |
| 2204 | |
| 2205 | if (FRAME_TOP_MARGIN (frame) > 0) |
| 2206 | min_height += FRAME_TOP_MARGIN (frame); |
| 2207 | |
| 2208 | if (*rows < min_height) |
| 2209 | *rows = min_height; |
| 2210 | if (*cols < MIN_SAFE_WINDOW_WIDTH) |
| 2211 | *cols = MIN_SAFE_WINDOW_WIDTH; |
| 2212 | } |
| 2213 | |
| 2214 | |
| 2215 | /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means |
| 2216 | check if W's width can be changed, otherwise check W's height. |
| 2217 | CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's |
| 2218 | siblings, too. If none of the siblings is resizable, WINDOW isn't |
| 2219 | either. */ |
| 2220 | |
| 2221 | static int |
| 2222 | window_fixed_size_p (w, width_p, check_siblings_p) |
| 2223 | struct window *w; |
| 2224 | int width_p, check_siblings_p; |
| 2225 | { |
| 2226 | int fixed_p; |
| 2227 | struct window *c; |
| 2228 | |
| 2229 | if (!NILP (w->hchild)) |
| 2230 | { |
| 2231 | c = XWINDOW (w->hchild); |
| 2232 | |
| 2233 | if (width_p) |
| 2234 | { |
| 2235 | /* A horiz. combination is fixed-width if all of if its |
| 2236 | children are. */ |
| 2237 | while (c && window_fixed_size_p (c, width_p, 0)) |
| 2238 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2239 | fixed_p = c == NULL; |
| 2240 | } |
| 2241 | else |
| 2242 | { |
| 2243 | /* A horiz. combination is fixed-height if one of if its |
| 2244 | children is. */ |
| 2245 | while (c && !window_fixed_size_p (c, width_p, 0)) |
| 2246 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2247 | fixed_p = c != NULL; |
| 2248 | } |
| 2249 | } |
| 2250 | else if (!NILP (w->vchild)) |
| 2251 | { |
| 2252 | c = XWINDOW (w->vchild); |
| 2253 | |
| 2254 | if (width_p) |
| 2255 | { |
| 2256 | /* A vert. combination is fixed-width if one of if its |
| 2257 | children is. */ |
| 2258 | while (c && !window_fixed_size_p (c, width_p, 0)) |
| 2259 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2260 | fixed_p = c != NULL; |
| 2261 | } |
| 2262 | else |
| 2263 | { |
| 2264 | /* A vert. combination is fixed-height if all of if its |
| 2265 | children are. */ |
| 2266 | while (c && window_fixed_size_p (c, width_p, 0)) |
| 2267 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2268 | fixed_p = c == NULL; |
| 2269 | } |
| 2270 | } |
| 2271 | else if (BUFFERP (w->buffer)) |
| 2272 | { |
| 2273 | if (w->height_fixed_p && !width_p) |
| 2274 | fixed_p = 1; |
| 2275 | else |
| 2276 | { |
| 2277 | struct buffer *old = current_buffer; |
| 2278 | Lisp_Object val; |
| 2279 | |
| 2280 | current_buffer = XBUFFER (w->buffer); |
| 2281 | val = find_symbol_value (Qwindow_size_fixed); |
| 2282 | current_buffer = old; |
| 2283 | |
| 2284 | fixed_p = 0; |
| 2285 | if (!EQ (val, Qunbound)) |
| 2286 | { |
| 2287 | fixed_p = !NILP (val); |
| 2288 | |
| 2289 | if (fixed_p |
| 2290 | && ((EQ (val, Qheight) && width_p) |
| 2291 | || (EQ (val, Qwidth) && !width_p))) |
| 2292 | fixed_p = 0; |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | /* Can't tell if this one is resizable without looking at |
| 2297 | siblings. If all siblings are fixed-size this one is too. */ |
| 2298 | if (!fixed_p && check_siblings_p && WINDOWP (w->parent)) |
| 2299 | { |
| 2300 | Lisp_Object child; |
| 2301 | |
| 2302 | for (child = w->prev; !NILP (child); child = XWINDOW (child)->prev) |
| 2303 | if (!window_fixed_size_p (XWINDOW (child), width_p, 0)) |
| 2304 | break; |
| 2305 | |
| 2306 | if (NILP (child)) |
| 2307 | for (child = w->next; !NILP (child); child = XWINDOW (child)->next) |
| 2308 | if (!window_fixed_size_p (XWINDOW (child), width_p, 0)) |
| 2309 | break; |
| 2310 | |
| 2311 | if (NILP (child)) |
| 2312 | fixed_p = 1; |
| 2313 | } |
| 2314 | } |
| 2315 | else |
| 2316 | fixed_p = 1; |
| 2317 | |
| 2318 | return fixed_p; |
| 2319 | } |
| 2320 | |
| 2321 | |
| 2322 | /* Return the minimum size of window W, not taking fixed-width windows |
| 2323 | into account. WIDTH_P non-zero means return the minimum width, |
| 2324 | otherwise return the minimum height. If W is a combination window, |
| 2325 | compute the minimum size from the minimum sizes of W's children. */ |
| 2326 | |
| 2327 | static int |
| 2328 | window_min_size_1 (w, width_p) |
| 2329 | struct window *w; |
| 2330 | int width_p; |
| 2331 | { |
| 2332 | struct window *c; |
| 2333 | int size; |
| 2334 | |
| 2335 | if (!NILP (w->hchild)) |
| 2336 | { |
| 2337 | c = XWINDOW (w->hchild); |
| 2338 | size = 0; |
| 2339 | |
| 2340 | if (width_p) |
| 2341 | { |
| 2342 | /* The min width of a horizontal combination is |
| 2343 | the sum of the min widths of its children. */ |
| 2344 | while (c) |
| 2345 | { |
| 2346 | size += window_min_size_1 (c, width_p); |
| 2347 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2348 | } |
| 2349 | } |
| 2350 | else |
| 2351 | { |
| 2352 | /* The min height a horizontal combination equals |
| 2353 | the maximum of all min height of its children. */ |
| 2354 | while (c) |
| 2355 | { |
| 2356 | int min_size = window_min_size_1 (c, width_p); |
| 2357 | size = max (min_size, size); |
| 2358 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2359 | } |
| 2360 | } |
| 2361 | } |
| 2362 | else if (!NILP (w->vchild)) |
| 2363 | { |
| 2364 | c = XWINDOW (w->vchild); |
| 2365 | size = 0; |
| 2366 | |
| 2367 | if (width_p) |
| 2368 | { |
| 2369 | /* The min width of a vertical combination is |
| 2370 | the maximum of the min widths of its children. */ |
| 2371 | while (c) |
| 2372 | { |
| 2373 | int min_size = window_min_size_1 (c, width_p); |
| 2374 | size = max (min_size, size); |
| 2375 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2376 | } |
| 2377 | } |
| 2378 | else |
| 2379 | { |
| 2380 | /* The min height of a vertical combination equals |
| 2381 | the sum of the min height of its children. */ |
| 2382 | while (c) |
| 2383 | { |
| 2384 | size += window_min_size_1 (c, width_p); |
| 2385 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2386 | } |
| 2387 | } |
| 2388 | } |
| 2389 | else |
| 2390 | { |
| 2391 | if (width_p) |
| 2392 | size = window_min_width; |
| 2393 | else |
| 2394 | { |
| 2395 | if (MINI_WINDOW_P (w) |
| 2396 | || (!WINDOW_WANTS_MODELINE_P (w) |
| 2397 | && !WINDOW_WANTS_HEADER_LINE_P (w))) |
| 2398 | size = 1; |
| 2399 | else |
| 2400 | size = window_min_height; |
| 2401 | } |
| 2402 | } |
| 2403 | |
| 2404 | return size; |
| 2405 | } |
| 2406 | |
| 2407 | |
| 2408 | /* Return the minimum size of window W, taking fixed-size windows into |
| 2409 | account. WIDTH_P non-zero means return the minimum width, |
| 2410 | otherwise return the minimum height. IGNORE_FIXED_P non-zero means |
| 2411 | ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size |
| 2412 | unless FIXED is null. */ |
| 2413 | |
| 2414 | static int |
| 2415 | window_min_size (w, width_p, ignore_fixed_p, fixed) |
| 2416 | struct window *w; |
| 2417 | int width_p, ignore_fixed_p, *fixed; |
| 2418 | { |
| 2419 | int size, fixed_p; |
| 2420 | |
| 2421 | if (ignore_fixed_p) |
| 2422 | fixed_p = 0; |
| 2423 | else |
| 2424 | fixed_p = window_fixed_size_p (w, width_p, 1); |
| 2425 | |
| 2426 | if (fixed) |
| 2427 | *fixed = fixed_p; |
| 2428 | |
| 2429 | if (fixed_p) |
| 2430 | size = width_p ? XFASTINT (w->width) : XFASTINT (w->height); |
| 2431 | else |
| 2432 | size = window_min_size_1 (w, width_p); |
| 2433 | |
| 2434 | return size; |
| 2435 | } |
| 2436 | |
| 2437 | |
| 2438 | /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set |
| 2439 | WINDOW's width. Resize WINDOW's children, if any, so that they |
| 2440 | keep their proportionate size relative to WINDOW. Propagate |
| 2441 | WINDOW's top or left edge position to children. Delete windows |
| 2442 | that become too small unless NODELETE_P is non-zero. |
| 2443 | |
| 2444 | If NODELETE_P is 2, that means we do delete windows that are |
| 2445 | too small, even if they were too small before! */ |
| 2446 | |
| 2447 | static void |
| 2448 | size_window (window, size, width_p, nodelete_p) |
| 2449 | Lisp_Object window; |
| 2450 | int size, width_p, nodelete_p; |
| 2451 | { |
| 2452 | struct window *w = XWINDOW (window); |
| 2453 | struct window *c; |
| 2454 | Lisp_Object child, *forward, *sideward; |
| 2455 | int old_size, min_size; |
| 2456 | |
| 2457 | if (nodelete_p == 2) |
| 2458 | nodelete_p = 0; |
| 2459 | |
| 2460 | check_min_window_sizes (); |
| 2461 | size = max (0, size); |
| 2462 | |
| 2463 | /* If the window has been "too small" at one point, |
| 2464 | don't delete it for being "too small" in the future. |
| 2465 | Preserve it as long as that is at all possible. */ |
| 2466 | if (width_p) |
| 2467 | { |
| 2468 | old_size = XINT (w->width); |
| 2469 | min_size = window_min_width; |
| 2470 | } |
| 2471 | else |
| 2472 | { |
| 2473 | old_size = XINT (w->height); |
| 2474 | min_size = window_min_height; |
| 2475 | } |
| 2476 | |
| 2477 | if (old_size < min_size && nodelete_p != 2) |
| 2478 | w->too_small_ok = Qt; |
| 2479 | |
| 2480 | /* Maybe delete WINDOW if it's too small. */ |
| 2481 | if (nodelete_p != 1 && !NILP (w->parent)) |
| 2482 | { |
| 2483 | if (!MINI_WINDOW_P (w) && !NILP (w->too_small_ok)) |
| 2484 | min_size = width_p ? MIN_SAFE_WINDOW_WIDTH : MIN_SAFE_WINDOW_HEIGHT; |
| 2485 | else |
| 2486 | min_size = width_p ? window_min_width : window_min_height; |
| 2487 | |
| 2488 | if (size < min_size) |
| 2489 | { |
| 2490 | delete_window (window); |
| 2491 | return; |
| 2492 | } |
| 2493 | } |
| 2494 | |
| 2495 | /* Set redisplay hints. */ |
| 2496 | w->last_modified = make_number (0); |
| 2497 | w->last_overlay_modified = make_number (0); |
| 2498 | windows_or_buffers_changed++; |
| 2499 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (w->frame)) = 1; |
| 2500 | |
| 2501 | if (width_p) |
| 2502 | { |
| 2503 | sideward = &w->vchild; |
| 2504 | forward = &w->hchild; |
| 2505 | w->width = make_number (size); |
| 2506 | } |
| 2507 | else |
| 2508 | { |
| 2509 | sideward = &w->hchild; |
| 2510 | forward = &w->vchild; |
| 2511 | w->height = make_number (size); |
| 2512 | w->orig_height = Qnil; |
| 2513 | } |
| 2514 | |
| 2515 | if (!NILP (*sideward)) |
| 2516 | { |
| 2517 | for (child = *sideward; !NILP (child); child = c->next) |
| 2518 | { |
| 2519 | c = XWINDOW (child); |
| 2520 | if (width_p) |
| 2521 | c->left = w->left; |
| 2522 | else |
| 2523 | c->top = w->top; |
| 2524 | size_window (child, size, width_p, nodelete_p); |
| 2525 | } |
| 2526 | } |
| 2527 | else if (!NILP (*forward)) |
| 2528 | { |
| 2529 | int fixed_size, each, extra, n; |
| 2530 | int resize_fixed_p, nfixed; |
| 2531 | int last_pos, first_pos, nchildren, total; |
| 2532 | |
| 2533 | /* Determine the fixed-size portion of the this window, and the |
| 2534 | number of child windows. */ |
| 2535 | fixed_size = nchildren = nfixed = total = 0; |
| 2536 | for (child = *forward; !NILP (child); child = c->next, ++nchildren) |
| 2537 | { |
| 2538 | int child_size; |
| 2539 | |
| 2540 | c = XWINDOW (child); |
| 2541 | child_size = width_p ? XINT (c->width) : XINT (c->height); |
| 2542 | total += child_size; |
| 2543 | |
| 2544 | if (window_fixed_size_p (c, width_p, 0)) |
| 2545 | { |
| 2546 | fixed_size += child_size; |
| 2547 | ++nfixed; |
| 2548 | } |
| 2549 | } |
| 2550 | |
| 2551 | /* If the new size is smaller than fixed_size, or if there |
| 2552 | aren't any resizable windows, allow resizing fixed-size |
| 2553 | windows. */ |
| 2554 | resize_fixed_p = nfixed == nchildren || size < fixed_size; |
| 2555 | |
| 2556 | /* Compute how many lines/columns to add to each child. The |
| 2557 | value of extra takes care of rounding errors. */ |
| 2558 | n = resize_fixed_p ? nchildren : nchildren - nfixed; |
| 2559 | each = (size - total) / n; |
| 2560 | extra = (size - total) - n * each; |
| 2561 | |
| 2562 | /* Compute new children heights and edge positions. */ |
| 2563 | first_pos = width_p ? XINT (w->left) : XINT (w->top); |
| 2564 | last_pos = first_pos; |
| 2565 | for (child = *forward; !NILP (child); child = c->next) |
| 2566 | { |
| 2567 | int new_size, old_size; |
| 2568 | |
| 2569 | c = XWINDOW (child); |
| 2570 | old_size = width_p ? XFASTINT (c->width) : XFASTINT (c->height); |
| 2571 | new_size = old_size; |
| 2572 | |
| 2573 | /* The top or left edge position of this child equals the |
| 2574 | bottom or right edge of its predecessor. */ |
| 2575 | if (width_p) |
| 2576 | c->left = make_number (last_pos); |
| 2577 | else |
| 2578 | c->top = make_number (last_pos); |
| 2579 | |
| 2580 | /* If this child can be resized, do it. */ |
| 2581 | if (resize_fixed_p || !window_fixed_size_p (c, width_p, 0)) |
| 2582 | { |
| 2583 | new_size = old_size + each + extra; |
| 2584 | extra = 0; |
| 2585 | } |
| 2586 | |
| 2587 | /* Set new height. Note that size_window also propagates |
| 2588 | edge positions to children, so it's not a no-op if we |
| 2589 | didn't change the child's size. */ |
| 2590 | size_window (child, new_size, width_p, 1); |
| 2591 | |
| 2592 | /* Remember the bottom/right edge position of this child; it |
| 2593 | will be used to set the top/left edge of the next child. */ |
| 2594 | last_pos += new_size; |
| 2595 | } |
| 2596 | |
| 2597 | /* We should have covered the parent exactly with child windows. */ |
| 2598 | xassert (size == last_pos - first_pos); |
| 2599 | |
| 2600 | /* Now delete any children that became too small. */ |
| 2601 | if (!nodelete_p) |
| 2602 | for (child = *forward; !NILP (child); child = c->next) |
| 2603 | { |
| 2604 | int child_size; |
| 2605 | c = XWINDOW (child); |
| 2606 | child_size = width_p ? XINT (c->width) : XINT (c->height); |
| 2607 | size_window (child, child_size, width_p, 2); |
| 2608 | } |
| 2609 | } |
| 2610 | } |
| 2611 | |
| 2612 | /* Set WINDOW's height to HEIGHT, and recursively change the height of |
| 2613 | WINDOW's children. NODELETE non-zero means don't delete windows |
| 2614 | that become too small in the process. (The caller should check |
| 2615 | later and do so if appropriate.) */ |
| 2616 | |
| 2617 | void |
| 2618 | set_window_height (window, height, nodelete) |
| 2619 | Lisp_Object window; |
| 2620 | int height; |
| 2621 | int nodelete; |
| 2622 | { |
| 2623 | size_window (window, height, 0, nodelete); |
| 2624 | } |
| 2625 | |
| 2626 | |
| 2627 | /* Set WINDOW's width to WIDTH, and recursively change the width of |
| 2628 | WINDOW's children. NODELETE non-zero means don't delete windows |
| 2629 | that become too small in the process. (The caller should check |
| 2630 | later and do so if appropriate.) */ |
| 2631 | |
| 2632 | void |
| 2633 | set_window_width (window, width, nodelete) |
| 2634 | Lisp_Object window; |
| 2635 | int width; |
| 2636 | int nodelete; |
| 2637 | { |
| 2638 | size_window (window, width, 1, nodelete); |
| 2639 | } |
| 2640 | |
| 2641 | \f |
| 2642 | int window_select_count; |
| 2643 | |
| 2644 | Lisp_Object |
| 2645 | Fset_window_buffer_unwind (obuf) |
| 2646 | Lisp_Object obuf; |
| 2647 | { |
| 2648 | Fset_buffer (obuf); |
| 2649 | return Qnil; |
| 2650 | } |
| 2651 | |
| 2652 | |
| 2653 | /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero |
| 2654 | means it's allowed to run hooks. See make_frame for a case where |
| 2655 | it's not allowed. */ |
| 2656 | |
| 2657 | void |
| 2658 | set_window_buffer (window, buffer, run_hooks_p) |
| 2659 | Lisp_Object window, buffer; |
| 2660 | int run_hooks_p; |
| 2661 | { |
| 2662 | struct window *w = XWINDOW (window); |
| 2663 | struct buffer *b = XBUFFER (buffer); |
| 2664 | int count = specpdl_ptr - specpdl; |
| 2665 | |
| 2666 | w->buffer = buffer; |
| 2667 | |
| 2668 | if (EQ (window, selected_window)) |
| 2669 | b->last_selected_window = window; |
| 2670 | |
| 2671 | /* Update time stamps of buffer display. */ |
| 2672 | if (INTEGERP (b->display_count)) |
| 2673 | XSETINT (b->display_count, XINT (b->display_count) + 1); |
| 2674 | b->display_time = Fcurrent_time (); |
| 2675 | |
| 2676 | XSETFASTINT (w->window_end_pos, 0); |
| 2677 | XSETFASTINT (w->window_end_vpos, 0); |
| 2678 | bzero (&w->last_cursor, sizeof w->last_cursor); |
| 2679 | w->window_end_valid = Qnil; |
| 2680 | w->hscroll = w->min_hscroll = make_number (0); |
| 2681 | w->vscroll = 0; |
| 2682 | set_marker_both (w->pointm, buffer, BUF_PT (b), BUF_PT_BYTE (b)); |
| 2683 | set_marker_restricted (w->start, |
| 2684 | make_number (b->last_window_start), |
| 2685 | buffer); |
| 2686 | w->start_at_line_beg = Qnil; |
| 2687 | w->force_start = Qnil; |
| 2688 | XSETFASTINT (w->last_modified, 0); |
| 2689 | XSETFASTINT (w->last_overlay_modified, 0); |
| 2690 | windows_or_buffers_changed++; |
| 2691 | |
| 2692 | /* We must select BUFFER for running the window-scroll-functions. |
| 2693 | If WINDOW is selected, switch permanently. |
| 2694 | Otherwise, switch but go back to the ambient buffer afterward. */ |
| 2695 | if (EQ (window, selected_window)) |
| 2696 | Fset_buffer (buffer); |
| 2697 | /* We can't check ! NILP (Vwindow_scroll_functions) here |
| 2698 | because that might itself be a local variable. */ |
| 2699 | else if (window_initialized) |
| 2700 | { |
| 2701 | record_unwind_protect (Fset_window_buffer_unwind, Fcurrent_buffer ()); |
| 2702 | Fset_buffer (buffer); |
| 2703 | } |
| 2704 | |
| 2705 | /* Set left and right marginal area width from buffer. */ |
| 2706 | Fset_window_margins (window, b->left_margin_width, b->right_margin_width); |
| 2707 | |
| 2708 | if (run_hooks_p) |
| 2709 | { |
| 2710 | if (! NILP (Vwindow_scroll_functions)) |
| 2711 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
| 2712 | Fmarker_position (w->start)); |
| 2713 | |
| 2714 | if (! NILP (Vwindow_configuration_change_hook) |
| 2715 | && ! NILP (Vrun_hooks)) |
| 2716 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 2717 | } |
| 2718 | |
| 2719 | unbind_to (count, Qnil); |
| 2720 | } |
| 2721 | |
| 2722 | |
| 2723 | DEFUN ("set-window-buffer", Fset_window_buffer, Sset_window_buffer, 2, 2, 0, |
| 2724 | doc: /* Make WINDOW display BUFFER as its contents. |
| 2725 | BUFFER can be a buffer or buffer name. */) |
| 2726 | (window, buffer) |
| 2727 | register Lisp_Object window, buffer; |
| 2728 | { |
| 2729 | register Lisp_Object tem; |
| 2730 | register struct window *w = decode_window (window); |
| 2731 | |
| 2732 | XSETWINDOW (window, w); |
| 2733 | buffer = Fget_buffer (buffer); |
| 2734 | CHECK_BUFFER (buffer); |
| 2735 | |
| 2736 | if (NILP (XBUFFER (buffer)->name)) |
| 2737 | error ("Attempt to display deleted buffer"); |
| 2738 | |
| 2739 | tem = w->buffer; |
| 2740 | if (NILP (tem)) |
| 2741 | error ("Window is deleted"); |
| 2742 | else if (! EQ (tem, Qt)) /* w->buffer is t when the window |
| 2743 | is first being set up. */ |
| 2744 | { |
| 2745 | if (!NILP (w->dedicated) && !EQ (tem, buffer)) |
| 2746 | error ("Window is dedicated to `%s'", |
| 2747 | XSTRING (XBUFFER (tem)->name)->data); |
| 2748 | |
| 2749 | unshow_buffer (w); |
| 2750 | } |
| 2751 | |
| 2752 | set_window_buffer (window, buffer, 1); |
| 2753 | return Qnil; |
| 2754 | } |
| 2755 | |
| 2756 | DEFUN ("select-window", Fselect_window, Sselect_window, 1, 1, 0, |
| 2757 | doc: /* Select WINDOW. Most editing will apply to WINDOW's buffer. |
| 2758 | If WINDOW is not already selected, also make WINDOW's buffer current. |
| 2759 | Note that the main editor command loop |
| 2760 | selects the buffer of the selected window before each command. */) |
| 2761 | (window) |
| 2762 | register Lisp_Object window; |
| 2763 | { |
| 2764 | return select_window_1 (window, 1); |
| 2765 | } |
| 2766 | \f |
| 2767 | /* Note that selected_window can be nil |
| 2768 | when this is called from Fset_window_configuration. */ |
| 2769 | |
| 2770 | static Lisp_Object |
| 2771 | select_window_1 (window, recordflag) |
| 2772 | register Lisp_Object window; |
| 2773 | int recordflag; |
| 2774 | { |
| 2775 | register struct window *w; |
| 2776 | register struct window *ow; |
| 2777 | struct frame *sf; |
| 2778 | |
| 2779 | CHECK_LIVE_WINDOW (window); |
| 2780 | |
| 2781 | w = XWINDOW (window); |
| 2782 | w->frozen_window_start_p = 0; |
| 2783 | |
| 2784 | XSETFASTINT (w->use_time, ++window_select_count); |
| 2785 | if (EQ (window, selected_window)) |
| 2786 | return window; |
| 2787 | |
| 2788 | if (!NILP (selected_window)) |
| 2789 | { |
| 2790 | ow = XWINDOW (selected_window); |
| 2791 | if (! NILP (ow->buffer)) |
| 2792 | set_marker_both (ow->pointm, ow->buffer, |
| 2793 | BUF_PT (XBUFFER (ow->buffer)), |
| 2794 | BUF_PT_BYTE (XBUFFER (ow->buffer))); |
| 2795 | } |
| 2796 | |
| 2797 | selected_window = window; |
| 2798 | sf = SELECTED_FRAME (); |
| 2799 | if (XFRAME (WINDOW_FRAME (w)) != sf) |
| 2800 | { |
| 2801 | XFRAME (WINDOW_FRAME (w))->selected_window = window; |
| 2802 | /* Use this rather than Fhandle_switch_frame |
| 2803 | so that FRAME_FOCUS_FRAME is moved appropriately as we |
| 2804 | move around in the state where a minibuffer in a separate |
| 2805 | frame is active. */ |
| 2806 | Fselect_frame (WINDOW_FRAME (w), Qnil); |
| 2807 | } |
| 2808 | else |
| 2809 | sf->selected_window = window; |
| 2810 | |
| 2811 | if (recordflag) |
| 2812 | record_buffer (w->buffer); |
| 2813 | Fset_buffer (w->buffer); |
| 2814 | |
| 2815 | XBUFFER (w->buffer)->last_selected_window = window; |
| 2816 | |
| 2817 | /* Go to the point recorded in the window. |
| 2818 | This is important when the buffer is in more |
| 2819 | than one window. It also matters when |
| 2820 | redisplay_window has altered point after scrolling, |
| 2821 | because it makes the change only in the window. */ |
| 2822 | { |
| 2823 | register int new_point = marker_position (w->pointm); |
| 2824 | if (new_point < BEGV) |
| 2825 | SET_PT (BEGV); |
| 2826 | else if (new_point > ZV) |
| 2827 | SET_PT (ZV); |
| 2828 | else |
| 2829 | SET_PT (new_point); |
| 2830 | } |
| 2831 | |
| 2832 | windows_or_buffers_changed++; |
| 2833 | return window; |
| 2834 | } |
| 2835 | \f |
| 2836 | /* Deiconify the frame containing the window WINDOW, |
| 2837 | unless it is the selected frame; |
| 2838 | then return WINDOW. |
| 2839 | |
| 2840 | The reason for the exception for the selected frame |
| 2841 | is that it seems better not to change the selected frames visibility |
| 2842 | merely because of displaying a different buffer in it. |
| 2843 | The deiconification is useful when a buffer gets shown in |
| 2844 | another frame that you were not using lately. */ |
| 2845 | |
| 2846 | static Lisp_Object |
| 2847 | display_buffer_1 (window) |
| 2848 | Lisp_Object window; |
| 2849 | { |
| 2850 | Lisp_Object frame = XWINDOW (window)->frame; |
| 2851 | FRAME_PTR f = XFRAME (frame); |
| 2852 | |
| 2853 | FRAME_SAMPLE_VISIBILITY (f); |
| 2854 | |
| 2855 | if (!EQ (frame, selected_frame)) |
| 2856 | { |
| 2857 | if (FRAME_ICONIFIED_P (f)) |
| 2858 | Fmake_frame_visible (frame); |
| 2859 | else if (FRAME_VISIBLE_P (f)) |
| 2860 | Fraise_frame (frame); |
| 2861 | } |
| 2862 | |
| 2863 | return window; |
| 2864 | } |
| 2865 | |
| 2866 | DEFUN ("special-display-p", Fspecial_display_p, Sspecial_display_p, 1, 1, 0, |
| 2867 | doc: /* Returns non-nil if a buffer named BUFFER-NAME would be created specially. |
| 2868 | The value is actually t if the frame should be called with default frame |
| 2869 | parameters, and a list of frame parameters if they were specified. |
| 2870 | See `special-display-buffer-names', and `special-display-regexps'. */) |
| 2871 | (buffer_name) |
| 2872 | Lisp_Object buffer_name; |
| 2873 | { |
| 2874 | Lisp_Object tem; |
| 2875 | |
| 2876 | CHECK_STRING (buffer_name); |
| 2877 | |
| 2878 | tem = Fmember (buffer_name, Vspecial_display_buffer_names); |
| 2879 | if (!NILP (tem)) |
| 2880 | return Qt; |
| 2881 | |
| 2882 | tem = Fassoc (buffer_name, Vspecial_display_buffer_names); |
| 2883 | if (!NILP (tem)) |
| 2884 | return XCDR (tem); |
| 2885 | |
| 2886 | for (tem = Vspecial_display_regexps; CONSP (tem); tem = XCDR (tem)) |
| 2887 | { |
| 2888 | Lisp_Object car = XCAR (tem); |
| 2889 | if (STRINGP (car) |
| 2890 | && fast_string_match (car, buffer_name) >= 0) |
| 2891 | return Qt; |
| 2892 | else if (CONSP (car) |
| 2893 | && STRINGP (XCAR (car)) |
| 2894 | && fast_string_match (XCAR (car), buffer_name) >= 0) |
| 2895 | return XCDR (car); |
| 2896 | } |
| 2897 | return Qnil; |
| 2898 | } |
| 2899 | |
| 2900 | DEFUN ("same-window-p", Fsame_window_p, Ssame_window_p, 1, 1, 0, |
| 2901 | doc: /* Returns non-nil if a new buffer named BUFFER-NAME would use the same window. |
| 2902 | See `same-window-buffer-names' and `same-window-regexps'. */) |
| 2903 | (buffer_name) |
| 2904 | Lisp_Object buffer_name; |
| 2905 | { |
| 2906 | Lisp_Object tem; |
| 2907 | |
| 2908 | CHECK_STRING (buffer_name); |
| 2909 | |
| 2910 | tem = Fmember (buffer_name, Vsame_window_buffer_names); |
| 2911 | if (!NILP (tem)) |
| 2912 | return Qt; |
| 2913 | |
| 2914 | tem = Fassoc (buffer_name, Vsame_window_buffer_names); |
| 2915 | if (!NILP (tem)) |
| 2916 | return Qt; |
| 2917 | |
| 2918 | for (tem = Vsame_window_regexps; CONSP (tem); tem = XCDR (tem)) |
| 2919 | { |
| 2920 | Lisp_Object car = XCAR (tem); |
| 2921 | if (STRINGP (car) |
| 2922 | && fast_string_match (car, buffer_name) >= 0) |
| 2923 | return Qt; |
| 2924 | else if (CONSP (car) |
| 2925 | && STRINGP (XCAR (car)) |
| 2926 | && fast_string_match (XCAR (car), buffer_name) >= 0) |
| 2927 | return Qt; |
| 2928 | } |
| 2929 | return Qnil; |
| 2930 | } |
| 2931 | |
| 2932 | /* Use B so the default is (other-buffer). */ |
| 2933 | DEFUN ("display-buffer", Fdisplay_buffer, Sdisplay_buffer, 1, 3, |
| 2934 | "BDisplay buffer: \nP", |
| 2935 | doc: /* Make BUFFER appear in some window but don't select it. |
| 2936 | BUFFER can be a buffer or a buffer name. |
| 2937 | If BUFFER is shown already in some window, just use that one, |
| 2938 | unless the window is the selected window and the optional second |
| 2939 | argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg). |
| 2940 | If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER. |
| 2941 | Returns the window displaying BUFFER. |
| 2942 | If `display-buffer-reuse-frames' is non-nil, and another frame is currently |
| 2943 | displaying BUFFER, then simply raise that frame. |
| 2944 | |
| 2945 | The variables `special-display-buffer-names', `special-display-regexps', |
| 2946 | `same-window-buffer-names', and `same-window-regexps' customize how certain |
| 2947 | buffer names are handled. |
| 2948 | |
| 2949 | If optional argument FRAME is `visible', search all visible frames. |
| 2950 | If FRAME is 0, search all visible and iconified frames. |
| 2951 | If FRAME is t, search all frames. |
| 2952 | If FRAME is a frame, search only that frame. |
| 2953 | If FRAME is nil, search only the selected frame |
| 2954 | (actually the last nonminibuffer frame), |
| 2955 | unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil, |
| 2956 | which means search visible and iconified frames. |
| 2957 | |
| 2958 | If `even-window-heights' is non-nil, window heights will be evened out |
| 2959 | if displaying the buffer causes two vertically adjacent windows to be |
| 2960 | displayed. */) |
| 2961 | (buffer, not_this_window, frame) |
| 2962 | register Lisp_Object buffer, not_this_window, frame; |
| 2963 | { |
| 2964 | register Lisp_Object window, tem, swp; |
| 2965 | struct frame *f; |
| 2966 | |
| 2967 | swp = Qnil; |
| 2968 | buffer = Fget_buffer (buffer); |
| 2969 | CHECK_BUFFER (buffer); |
| 2970 | |
| 2971 | if (!NILP (Vdisplay_buffer_function)) |
| 2972 | return call2 (Vdisplay_buffer_function, buffer, not_this_window); |
| 2973 | |
| 2974 | if (NILP (not_this_window) |
| 2975 | && XBUFFER (XWINDOW (selected_window)->buffer) == XBUFFER (buffer)) |
| 2976 | return display_buffer_1 (selected_window); |
| 2977 | |
| 2978 | /* See if the user has specified this buffer should appear |
| 2979 | in the selected window. */ |
| 2980 | if (NILP (not_this_window)) |
| 2981 | { |
| 2982 | swp = Fsame_window_p (XBUFFER (buffer)->name); |
| 2983 | if (!NILP (swp) && !no_switch_window (selected_window)) |
| 2984 | { |
| 2985 | Fswitch_to_buffer (buffer, Qnil); |
| 2986 | return display_buffer_1 (selected_window); |
| 2987 | } |
| 2988 | } |
| 2989 | |
| 2990 | /* If the user wants pop-up-frames or display-buffer-reuse-frames, |
| 2991 | look for a window showing BUFFER on any visible or iconified frame. |
| 2992 | Otherwise search only the current frame. */ |
| 2993 | if (! NILP (frame)) |
| 2994 | tem = frame; |
| 2995 | else if (pop_up_frames |
| 2996 | || display_buffer_reuse_frames |
| 2997 | || last_nonminibuf_frame == 0) |
| 2998 | XSETFASTINT (tem, 0); |
| 2999 | else |
| 3000 | XSETFRAME (tem, last_nonminibuf_frame); |
| 3001 | |
| 3002 | window = Fget_buffer_window (buffer, tem); |
| 3003 | if (!NILP (window) |
| 3004 | && (NILP (not_this_window) || !EQ (window, selected_window))) |
| 3005 | return display_buffer_1 (window); |
| 3006 | |
| 3007 | /* Certain buffer names get special handling. */ |
| 3008 | if (!NILP (Vspecial_display_function) && NILP (swp)) |
| 3009 | { |
| 3010 | tem = Fspecial_display_p (XBUFFER (buffer)->name); |
| 3011 | if (EQ (tem, Qt)) |
| 3012 | return call1 (Vspecial_display_function, buffer); |
| 3013 | if (CONSP (tem)) |
| 3014 | return call2 (Vspecial_display_function, buffer, tem); |
| 3015 | } |
| 3016 | |
| 3017 | /* If there are no frames open that have more than a minibuffer, |
| 3018 | we need to create a new frame. */ |
| 3019 | if (pop_up_frames || last_nonminibuf_frame == 0) |
| 3020 | { |
| 3021 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
| 3022 | Fset_window_buffer (window, buffer); |
| 3023 | return display_buffer_1 (window); |
| 3024 | } |
| 3025 | |
| 3026 | f = SELECTED_FRAME (); |
| 3027 | if (pop_up_windows |
| 3028 | || FRAME_MINIBUF_ONLY_P (f) |
| 3029 | /* If the current frame is a special display frame, |
| 3030 | don't try to reuse its windows. */ |
| 3031 | || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f))->dedicated)) |
| 3032 | { |
| 3033 | Lisp_Object frames; |
| 3034 | |
| 3035 | frames = Qnil; |
| 3036 | if (FRAME_MINIBUF_ONLY_P (f)) |
| 3037 | XSETFRAME (frames, last_nonminibuf_frame); |
| 3038 | /* Don't try to create a window if would get an error */ |
| 3039 | if (split_height_threshold < window_min_height << 1) |
| 3040 | split_height_threshold = window_min_height << 1; |
| 3041 | |
| 3042 | /* Note that both Fget_largest_window and Fget_lru_window |
| 3043 | ignore minibuffers and dedicated windows. |
| 3044 | This means they can return nil. */ |
| 3045 | |
| 3046 | /* If the frame we would try to split cannot be split, |
| 3047 | try other frames. */ |
| 3048 | if (FRAME_NO_SPLIT_P (NILP (frames) ? f : last_nonminibuf_frame)) |
| 3049 | { |
| 3050 | /* Try visible frames first. */ |
| 3051 | window = Fget_largest_window (Qvisible); |
| 3052 | /* If that didn't work, try iconified frames. */ |
| 3053 | if (NILP (window)) |
| 3054 | window = Fget_largest_window (make_number (0)); |
| 3055 | if (NILP (window)) |
| 3056 | window = Fget_largest_window (Qt); |
| 3057 | } |
| 3058 | else |
| 3059 | window = Fget_largest_window (frames); |
| 3060 | |
| 3061 | /* If we got a tall enough full-width window that can be split, |
| 3062 | split it. */ |
| 3063 | if (!NILP (window) |
| 3064 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
| 3065 | && window_height (window) >= split_height_threshold |
| 3066 | && WINDOW_FULL_WIDTH_P (XWINDOW (window))) |
| 3067 | window = Fsplit_window (window, Qnil, Qnil); |
| 3068 | else |
| 3069 | { |
| 3070 | Lisp_Object upper, lower, other; |
| 3071 | |
| 3072 | window = Fget_lru_window (frames); |
| 3073 | /* If the LRU window is selected, and big enough, |
| 3074 | and can be split, split it. */ |
| 3075 | if (!NILP (window) |
| 3076 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
| 3077 | && (EQ (window, selected_window) |
| 3078 | || EQ (XWINDOW (window)->parent, Qnil)) |
| 3079 | && window_height (window) >= window_min_height << 1) |
| 3080 | window = Fsplit_window (window, Qnil, Qnil); |
| 3081 | /* If Fget_lru_window returned nil, try other approaches. */ |
| 3082 | |
| 3083 | /* Try visible frames first. */ |
| 3084 | if (NILP (window)) |
| 3085 | window = Fget_buffer_window (buffer, Qvisible); |
| 3086 | if (NILP (window)) |
| 3087 | window = Fget_largest_window (Qvisible); |
| 3088 | /* If that didn't work, try iconified frames. */ |
| 3089 | if (NILP (window)) |
| 3090 | window = Fget_buffer_window (buffer, make_number (0)); |
| 3091 | if (NILP (window)) |
| 3092 | window = Fget_largest_window (make_number (0)); |
| 3093 | /* Try invisible frames. */ |
| 3094 | if (NILP (window)) |
| 3095 | window = Fget_buffer_window (buffer, Qt); |
| 3096 | if (NILP (window)) |
| 3097 | window = Fget_largest_window (Qt); |
| 3098 | /* As a last resort, make a new frame. */ |
| 3099 | if (NILP (window)) |
| 3100 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
| 3101 | /* If window appears above or below another, |
| 3102 | even out their heights. */ |
| 3103 | other = upper = lower = Qnil; |
| 3104 | if (!NILP (XWINDOW (window)->prev)) |
| 3105 | other = upper = XWINDOW (window)->prev, lower = window; |
| 3106 | if (!NILP (XWINDOW (window)->next)) |
| 3107 | other = lower = XWINDOW (window)->next, upper = window; |
| 3108 | if (!NILP (other) |
| 3109 | && !NILP (Veven_window_heights) |
| 3110 | /* Check that OTHER and WINDOW are vertically arrayed. */ |
| 3111 | && !EQ (XWINDOW (other)->top, XWINDOW (window)->top) |
| 3112 | && (XFASTINT (XWINDOW (other)->height) |
| 3113 | > XFASTINT (XWINDOW (window)->height))) |
| 3114 | { |
| 3115 | int total = (XFASTINT (XWINDOW (other)->height) |
| 3116 | + XFASTINT (XWINDOW (window)->height)); |
| 3117 | enlarge_window (upper, |
| 3118 | total / 2 - XFASTINT (XWINDOW (upper)->height), |
| 3119 | 0, 0); |
| 3120 | } |
| 3121 | } |
| 3122 | } |
| 3123 | else |
| 3124 | window = Fget_lru_window (Qnil); |
| 3125 | |
| 3126 | Fset_window_buffer (window, buffer); |
| 3127 | return display_buffer_1 (window); |
| 3128 | } |
| 3129 | |
| 3130 | void |
| 3131 | temp_output_buffer_show (buf) |
| 3132 | register Lisp_Object buf; |
| 3133 | { |
| 3134 | register struct buffer *old = current_buffer; |
| 3135 | register Lisp_Object window; |
| 3136 | register struct window *w; |
| 3137 | |
| 3138 | XBUFFER (buf)->directory = current_buffer->directory; |
| 3139 | |
| 3140 | Fset_buffer (buf); |
| 3141 | BUF_SAVE_MODIFF (XBUFFER (buf)) = MODIFF; |
| 3142 | BEGV = BEG; |
| 3143 | ZV = Z; |
| 3144 | SET_PT (BEG); |
| 3145 | XBUFFER (buf)->prevent_redisplay_optimizations_p = 1; |
| 3146 | set_buffer_internal (old); |
| 3147 | |
| 3148 | if (!EQ (Vtemp_buffer_show_function, Qnil)) |
| 3149 | call1 (Vtemp_buffer_show_function, buf); |
| 3150 | else |
| 3151 | { |
| 3152 | window = Fdisplay_buffer (buf, Qnil, Qnil); |
| 3153 | |
| 3154 | if (!EQ (XWINDOW (window)->frame, selected_frame)) |
| 3155 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window))); |
| 3156 | Vminibuf_scroll_window = window; |
| 3157 | w = XWINDOW (window); |
| 3158 | XSETFASTINT (w->hscroll, 0); |
| 3159 | XSETFASTINT (w->min_hscroll, 0); |
| 3160 | set_marker_restricted_both (w->start, buf, 1, 1); |
| 3161 | set_marker_restricted_both (w->pointm, buf, 1, 1); |
| 3162 | |
| 3163 | /* Run temp-buffer-show-hook, with the chosen window selected |
| 3164 | and it sbuffer current. */ |
| 3165 | if (!NILP (Vrun_hooks)) |
| 3166 | { |
| 3167 | Lisp_Object tem; |
| 3168 | tem = Fboundp (Qtemp_buffer_show_hook); |
| 3169 | if (!NILP (tem)) |
| 3170 | { |
| 3171 | tem = Fsymbol_value (Qtemp_buffer_show_hook); |
| 3172 | if (!NILP (tem)) |
| 3173 | { |
| 3174 | int count = specpdl_ptr - specpdl; |
| 3175 | Lisp_Object prev_window; |
| 3176 | prev_window = selected_window; |
| 3177 | |
| 3178 | /* Select the window that was chosen, for running the hook. */ |
| 3179 | record_unwind_protect (Fselect_window, prev_window); |
| 3180 | select_window_1 (window, 0); |
| 3181 | Fset_buffer (w->buffer); |
| 3182 | call1 (Vrun_hooks, Qtemp_buffer_show_hook); |
| 3183 | select_window_1 (prev_window, 0); |
| 3184 | unbind_to (count, Qnil); |
| 3185 | } |
| 3186 | } |
| 3187 | } |
| 3188 | } |
| 3189 | } |
| 3190 | \f |
| 3191 | static void |
| 3192 | make_dummy_parent (window) |
| 3193 | Lisp_Object window; |
| 3194 | { |
| 3195 | Lisp_Object new; |
| 3196 | register struct window *o, *p; |
| 3197 | int i; |
| 3198 | |
| 3199 | o = XWINDOW (window); |
| 3200 | p = allocate_window (); |
| 3201 | for (i = 0; i < VECSIZE (struct window); ++i) |
| 3202 | ((struct Lisp_Vector *) p)->contents[i] |
| 3203 | = ((struct Lisp_Vector *)o)->contents[i]; |
| 3204 | XSETWINDOW (new, p); |
| 3205 | |
| 3206 | XSETFASTINT (p->sequence_number, ++sequence_number); |
| 3207 | |
| 3208 | /* Put new into window structure in place of window */ |
| 3209 | replace_window (window, new); |
| 3210 | |
| 3211 | o->next = Qnil; |
| 3212 | o->prev = Qnil; |
| 3213 | o->vchild = Qnil; |
| 3214 | o->hchild = Qnil; |
| 3215 | o->parent = new; |
| 3216 | |
| 3217 | p->start = Qnil; |
| 3218 | p->pointm = Qnil; |
| 3219 | p->buffer = Qnil; |
| 3220 | } |
| 3221 | |
| 3222 | DEFUN ("split-window", Fsplit_window, Ssplit_window, 0, 3, "", |
| 3223 | doc: /* Split WINDOW, putting SIZE lines in the first of the pair. |
| 3224 | WINDOW defaults to selected one and SIZE to half its size. |
| 3225 | If optional third arg HORFLAG is non-nil, split side by side |
| 3226 | and put SIZE columns in the first of the pair. In that case, |
| 3227 | SIZE includes that window's scroll bar, or the divider column to its right. */) |
| 3228 | (window, size, horflag) |
| 3229 | Lisp_Object window, size, horflag; |
| 3230 | { |
| 3231 | register Lisp_Object new; |
| 3232 | register struct window *o, *p; |
| 3233 | FRAME_PTR fo; |
| 3234 | register int size_int; |
| 3235 | |
| 3236 | if (NILP (window)) |
| 3237 | window = selected_window; |
| 3238 | else |
| 3239 | CHECK_LIVE_WINDOW (window); |
| 3240 | |
| 3241 | o = XWINDOW (window); |
| 3242 | fo = XFRAME (WINDOW_FRAME (o)); |
| 3243 | |
| 3244 | if (NILP (size)) |
| 3245 | { |
| 3246 | if (!NILP (horflag)) |
| 3247 | /* Calculate the size of the left-hand window, by dividing |
| 3248 | the usable space in columns by two. |
| 3249 | We round up, since the left-hand window may include |
| 3250 | a dividing line, while the right-hand may not. */ |
| 3251 | size_int = (XFASTINT (o->width) + 1) >> 1; |
| 3252 | else |
| 3253 | size_int = XFASTINT (o->height) >> 1; |
| 3254 | } |
| 3255 | else |
| 3256 | { |
| 3257 | CHECK_NUMBER (size); |
| 3258 | size_int = XINT (size); |
| 3259 | } |
| 3260 | |
| 3261 | if (MINI_WINDOW_P (o)) |
| 3262 | error ("Attempt to split minibuffer window"); |
| 3263 | else if (window_fixed_size_p (o, !NILP (horflag), 0)) |
| 3264 | error ("Attempt to split fixed-size window"); |
| 3265 | |
| 3266 | check_min_window_sizes (); |
| 3267 | |
| 3268 | if (NILP (horflag)) |
| 3269 | { |
| 3270 | if (size_int < window_min_height) |
| 3271 | error ("Window height %d too small (after splitting)", size_int); |
| 3272 | if (size_int + window_min_height > XFASTINT (o->height)) |
| 3273 | error ("Window height %d too small (after splitting)", |
| 3274 | XFASTINT (o->height) - size_int); |
| 3275 | if (NILP (o->parent) |
| 3276 | || NILP (XWINDOW (o->parent)->vchild)) |
| 3277 | { |
| 3278 | make_dummy_parent (window); |
| 3279 | new = o->parent; |
| 3280 | XWINDOW (new)->vchild = window; |
| 3281 | } |
| 3282 | } |
| 3283 | else |
| 3284 | { |
| 3285 | if (size_int < window_min_width) |
| 3286 | error ("Window width %d too small (after splitting)", size_int); |
| 3287 | |
| 3288 | if (size_int + window_min_width > XFASTINT (o->width)) |
| 3289 | error ("Window width %d too small (after splitting)", |
| 3290 | XFASTINT (o->width) - size_int); |
| 3291 | if (NILP (o->parent) |
| 3292 | || NILP (XWINDOW (o->parent)->hchild)) |
| 3293 | { |
| 3294 | make_dummy_parent (window); |
| 3295 | new = o->parent; |
| 3296 | XWINDOW (new)->hchild = window; |
| 3297 | } |
| 3298 | } |
| 3299 | |
| 3300 | /* Now we know that window's parent is a vertical combination |
| 3301 | if we are dividing vertically, or a horizontal combination |
| 3302 | if we are making side-by-side windows */ |
| 3303 | |
| 3304 | windows_or_buffers_changed++; |
| 3305 | FRAME_WINDOW_SIZES_CHANGED (fo) = 1; |
| 3306 | new = make_window (); |
| 3307 | p = XWINDOW (new); |
| 3308 | |
| 3309 | p->frame = o->frame; |
| 3310 | p->next = o->next; |
| 3311 | if (!NILP (p->next)) |
| 3312 | XWINDOW (p->next)->prev = new; |
| 3313 | p->prev = window; |
| 3314 | o->next = new; |
| 3315 | p->parent = o->parent; |
| 3316 | p->buffer = Qt; |
| 3317 | p->window_end_valid = Qnil; |
| 3318 | bzero (&p->last_cursor, sizeof p->last_cursor); |
| 3319 | |
| 3320 | /* Apportion the available frame space among the two new windows */ |
| 3321 | |
| 3322 | if (!NILP (horflag)) |
| 3323 | { |
| 3324 | p->height = o->height; |
| 3325 | p->top = o->top; |
| 3326 | XSETFASTINT (p->width, XFASTINT (o->width) - size_int); |
| 3327 | XSETFASTINT (o->width, size_int); |
| 3328 | XSETFASTINT (p->left, XFASTINT (o->left) + size_int); |
| 3329 | } |
| 3330 | else |
| 3331 | { |
| 3332 | p->left = o->left; |
| 3333 | p->width = o->width; |
| 3334 | XSETFASTINT (p->height, XFASTINT (o->height) - size_int); |
| 3335 | XSETFASTINT (o->height, size_int); |
| 3336 | XSETFASTINT (p->top, XFASTINT (o->top) + size_int); |
| 3337 | } |
| 3338 | |
| 3339 | /* Adjust glyph matrices. */ |
| 3340 | adjust_glyphs (fo); |
| 3341 | Fset_window_buffer (new, o->buffer); |
| 3342 | return new; |
| 3343 | } |
| 3344 | \f |
| 3345 | DEFUN ("enlarge-window", Fenlarge_window, Senlarge_window, 1, 3, "p", |
| 3346 | doc: /* Make current window ARG lines bigger. |
| 3347 | From program, optional second arg non-nil means grow sideways ARG columns. |
| 3348 | Interactively, if an argument is not given, make the window one line bigger. |
| 3349 | |
| 3350 | Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size |
| 3351 | of the siblings above or to the left of the selected window. Only |
| 3352 | siblings to the right or below are changed. */) |
| 3353 | (arg, side, preserve_before) |
| 3354 | register Lisp_Object arg, side, preserve_before; |
| 3355 | { |
| 3356 | CHECK_NUMBER (arg); |
| 3357 | enlarge_window (selected_window, XINT (arg), !NILP (side), |
| 3358 | !NILP (preserve_before)); |
| 3359 | |
| 3360 | if (! NILP (Vwindow_configuration_change_hook)) |
| 3361 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 3362 | |
| 3363 | return Qnil; |
| 3364 | } |
| 3365 | |
| 3366 | DEFUN ("shrink-window", Fshrink_window, Sshrink_window, 1, 2, "p", |
| 3367 | doc: /* Make current window ARG lines smaller. |
| 3368 | From program, optional second arg non-nil means shrink sideways arg columns. |
| 3369 | Interactively, if an argument is not given, make the window one line smaller. */) |
| 3370 | (arg, side) |
| 3371 | register Lisp_Object arg, side; |
| 3372 | { |
| 3373 | CHECK_NUMBER (arg); |
| 3374 | enlarge_window (selected_window, -XINT (arg), !NILP (side), 0); |
| 3375 | |
| 3376 | if (! NILP (Vwindow_configuration_change_hook)) |
| 3377 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 3378 | |
| 3379 | return Qnil; |
| 3380 | } |
| 3381 | |
| 3382 | int |
| 3383 | window_height (window) |
| 3384 | Lisp_Object window; |
| 3385 | { |
| 3386 | register struct window *p = XWINDOW (window); |
| 3387 | return XFASTINT (p->height); |
| 3388 | } |
| 3389 | |
| 3390 | int |
| 3391 | window_width (window) |
| 3392 | Lisp_Object window; |
| 3393 | { |
| 3394 | register struct window *p = XWINDOW (window); |
| 3395 | return XFASTINT (p->width); |
| 3396 | } |
| 3397 | |
| 3398 | |
| 3399 | #define CURBEG(w) \ |
| 3400 | *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top)) |
| 3401 | |
| 3402 | #define CURSIZE(w) \ |
| 3403 | *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height)) |
| 3404 | |
| 3405 | |
| 3406 | /* Enlarge WINDOW by DELTA. WIDTHFLAG non-zero means |
| 3407 | increase its width. Siblings of the selected window are resized to |
| 3408 | fulfill the size request. If they become too small in the process, |
| 3409 | they will be deleted. |
| 3410 | |
| 3411 | If PRESERVE_BEFORE is nonzero, that means don't alter |
| 3412 | the siblings to the left or above WINDOW. */ |
| 3413 | |
| 3414 | static void |
| 3415 | enlarge_window (window, delta, widthflag, preserve_before) |
| 3416 | Lisp_Object window; |
| 3417 | int delta, widthflag, preserve_before; |
| 3418 | { |
| 3419 | Lisp_Object parent, next, prev; |
| 3420 | struct window *p; |
| 3421 | Lisp_Object *sizep; |
| 3422 | int maximum; |
| 3423 | int (*sizefun) P_ ((Lisp_Object)) |
| 3424 | = widthflag ? window_width : window_height; |
| 3425 | void (*setsizefun) P_ ((Lisp_Object, int, int)) |
| 3426 | = (widthflag ? set_window_width : set_window_height); |
| 3427 | |
| 3428 | /* Check values of window_min_width and window_min_height for |
| 3429 | validity. */ |
| 3430 | check_min_window_sizes (); |
| 3431 | |
| 3432 | /* Give up if this window cannot be resized. */ |
| 3433 | if (window_fixed_size_p (XWINDOW (window), widthflag, 1)) |
| 3434 | error ("Window is not resizable"); |
| 3435 | |
| 3436 | /* Find the parent of the selected window. */ |
| 3437 | while (1) |
| 3438 | { |
| 3439 | p = XWINDOW (window); |
| 3440 | parent = p->parent; |
| 3441 | |
| 3442 | if (NILP (parent)) |
| 3443 | { |
| 3444 | if (widthflag) |
| 3445 | error ("No other window to side of this one"); |
| 3446 | break; |
| 3447 | } |
| 3448 | |
| 3449 | if (widthflag |
| 3450 | ? !NILP (XWINDOW (parent)->hchild) |
| 3451 | : !NILP (XWINDOW (parent)->vchild)) |
| 3452 | break; |
| 3453 | |
| 3454 | window = parent; |
| 3455 | } |
| 3456 | |
| 3457 | sizep = &CURSIZE (window); |
| 3458 | |
| 3459 | { |
| 3460 | register int maxdelta; |
| 3461 | |
| 3462 | /* Compute the maximum size increment this window can have. */ |
| 3463 | |
| 3464 | if (preserve_before) |
| 3465 | { |
| 3466 | if (!NILP (parent)) |
| 3467 | { |
| 3468 | maxdelta = (*sizefun) (parent) - XINT (*sizep); |
| 3469 | /* Subtract size of siblings before, since we can't take that. */ |
| 3470 | maxdelta -= XINT (CURBEG (window)) - XINT (CURBEG (parent)); |
| 3471 | } |
| 3472 | else |
| 3473 | maxdelta = (!NILP (p->next) ? ((*sizefun) (p->next) |
| 3474 | - window_min_size (XWINDOW (p->next), |
| 3475 | widthflag, 0, 0)) |
| 3476 | : (delta = 0)); |
| 3477 | } |
| 3478 | else |
| 3479 | maxdelta = (!NILP (parent) ? (*sizefun) (parent) - XINT (*sizep) |
| 3480 | /* This is a main window followed by a minibuffer. */ |
| 3481 | : !NILP (p->next) ? ((*sizefun) (p->next) |
| 3482 | - window_min_size (XWINDOW (p->next), |
| 3483 | widthflag, 0, 0)) |
| 3484 | /* This is a minibuffer following a main window. */ |
| 3485 | : !NILP (p->prev) ? ((*sizefun) (p->prev) |
| 3486 | - window_min_size (XWINDOW (p->prev), |
| 3487 | widthflag, 0, 0)) |
| 3488 | /* This is a frame with only one window, a minibuffer-only |
| 3489 | or a minibufferless frame. */ |
| 3490 | : (delta = 0)); |
| 3491 | |
| 3492 | if (delta > maxdelta) |
| 3493 | /* This case traps trying to make the minibuffer |
| 3494 | the full frame, or make the only window aside from the |
| 3495 | minibuffer the full frame. */ |
| 3496 | delta = maxdelta; |
| 3497 | } |
| 3498 | |
| 3499 | if (XINT (*sizep) + delta < window_min_size (XWINDOW (window), widthflag, 0, 0)) |
| 3500 | { |
| 3501 | delete_window (window); |
| 3502 | return; |
| 3503 | } |
| 3504 | |
| 3505 | if (delta == 0) |
| 3506 | return; |
| 3507 | |
| 3508 | /* Find the total we can get from other siblings without deleting them. */ |
| 3509 | maximum = 0; |
| 3510 | for (next = p->next; ! NILP (next); next = XWINDOW (next)->next) |
| 3511 | maximum += (*sizefun) (next) - window_min_size (XWINDOW (next), |
| 3512 | widthflag, 0, 0); |
| 3513 | if (! preserve_before) |
| 3514 | for (prev = p->prev; ! NILP (prev); prev = XWINDOW (prev)->prev) |
| 3515 | maximum += (*sizefun) (prev) - window_min_size (XWINDOW (prev), |
| 3516 | widthflag, 0, 0); |
| 3517 | |
| 3518 | /* If we can get it all from them without deleting them, do so. */ |
| 3519 | if (delta <= maximum) |
| 3520 | { |
| 3521 | Lisp_Object first_unaffected; |
| 3522 | Lisp_Object first_affected; |
| 3523 | int fixed_p; |
| 3524 | |
| 3525 | next = p->next; |
| 3526 | prev = p->prev; |
| 3527 | first_affected = window; |
| 3528 | /* Look at one sibling at a time, |
| 3529 | moving away from this window in both directions alternately, |
| 3530 | and take as much as we can get without deleting that sibling. */ |
| 3531 | while (delta != 0 |
| 3532 | && (!NILP (next) || (!preserve_before && !NILP (prev)))) |
| 3533 | { |
| 3534 | if (! NILP (next)) |
| 3535 | { |
| 3536 | int this_one = ((*sizefun) (next) |
| 3537 | - window_min_size (XWINDOW (next), |
| 3538 | widthflag, 0, &fixed_p)); |
| 3539 | if (!fixed_p) |
| 3540 | { |
| 3541 | if (this_one > delta) |
| 3542 | this_one = delta; |
| 3543 | |
| 3544 | (*setsizefun) (next, (*sizefun) (next) - this_one, 0); |
| 3545 | (*setsizefun) (window, XINT (*sizep) + this_one, 0); |
| 3546 | |
| 3547 | delta -= this_one; |
| 3548 | } |
| 3549 | |
| 3550 | next = XWINDOW (next)->next; |
| 3551 | } |
| 3552 | |
| 3553 | if (delta == 0) |
| 3554 | break; |
| 3555 | |
| 3556 | if (!preserve_before && ! NILP (prev)) |
| 3557 | { |
| 3558 | int this_one = ((*sizefun) (prev) |
| 3559 | - window_min_size (XWINDOW (prev), |
| 3560 | widthflag, 0, &fixed_p)); |
| 3561 | if (!fixed_p) |
| 3562 | { |
| 3563 | if (this_one > delta) |
| 3564 | this_one = delta; |
| 3565 | |
| 3566 | first_affected = prev; |
| 3567 | |
| 3568 | (*setsizefun) (prev, (*sizefun) (prev) - this_one, 0); |
| 3569 | (*setsizefun) (window, XINT (*sizep) + this_one, 0); |
| 3570 | |
| 3571 | delta -= this_one; |
| 3572 | } |
| 3573 | |
| 3574 | prev = XWINDOW (prev)->prev; |
| 3575 | } |
| 3576 | } |
| 3577 | |
| 3578 | xassert (delta == 0); |
| 3579 | |
| 3580 | /* Now recalculate the edge positions of all the windows affected, |
| 3581 | based on the new sizes. */ |
| 3582 | first_unaffected = next; |
| 3583 | prev = first_affected; |
| 3584 | for (next = XWINDOW (prev)->next; ! EQ (next, first_unaffected); |
| 3585 | prev = next, next = XWINDOW (next)->next) |
| 3586 | { |
| 3587 | XSETINT (CURBEG (next), XINT (CURBEG (prev)) + (*sizefun) (prev)); |
| 3588 | /* This does not change size of NEXT, |
| 3589 | but it propagates the new top edge to its children */ |
| 3590 | (*setsizefun) (next, (*sizefun) (next), 0); |
| 3591 | } |
| 3592 | } |
| 3593 | else |
| 3594 | { |
| 3595 | register int delta1; |
| 3596 | register int opht = (*sizefun) (parent); |
| 3597 | |
| 3598 | if (opht <= XINT (*sizep) + delta) |
| 3599 | { |
| 3600 | /* If trying to grow this window to or beyond size of the parent, |
| 3601 | just delete all the sibling windows. */ |
| 3602 | Lisp_Object start, tem, next; |
| 3603 | |
| 3604 | start = XWINDOW (parent)->vchild; |
| 3605 | if (NILP (start)) |
| 3606 | start = XWINDOW (parent)->hchild; |
| 3607 | |
| 3608 | /* Delete any siblings that come after WINDOW. */ |
| 3609 | tem = XWINDOW (window)->next; |
| 3610 | while (! NILP (tem)) |
| 3611 | { |
| 3612 | next = XWINDOW (tem)->next; |
| 3613 | delete_window (tem); |
| 3614 | tem = next; |
| 3615 | } |
| 3616 | |
| 3617 | /* Delete any siblings that come after WINDOW. |
| 3618 | Note that if START is not WINDOW, then WINDOW still |
| 3619 | Fhas siblings, so WINDOW has not yet replaced its parent. */ |
| 3620 | tem = start; |
| 3621 | while (! EQ (tem, window)) |
| 3622 | { |
| 3623 | next = XWINDOW (tem)->next; |
| 3624 | delete_window (tem); |
| 3625 | tem = next; |
| 3626 | } |
| 3627 | } |
| 3628 | else |
| 3629 | { |
| 3630 | /* Otherwise, make delta1 just right so that if we add |
| 3631 | delta1 lines to this window and to the parent, and then |
| 3632 | shrink the parent back to its original size, the new |
| 3633 | proportional size of this window will increase by delta. |
| 3634 | |
| 3635 | The function size_window will compute the new height h' |
| 3636 | of the window from delta1 as: |
| 3637 | |
| 3638 | e = delta1/n |
| 3639 | x = delta1 - delta1/n * n for the 1st resizable child |
| 3640 | h' = h + e + x |
| 3641 | |
| 3642 | where n is the number of children that can be resized. |
| 3643 | We can ignore x by choosing a delta1 that is a multiple of |
| 3644 | n. We want the height of this window to come out as |
| 3645 | |
| 3646 | h' = h + delta |
| 3647 | |
| 3648 | So, delta1 must be |
| 3649 | |
| 3650 | h + e = h + delta |
| 3651 | delta1/n = delta |
| 3652 | delta1 = n * delta. |
| 3653 | |
| 3654 | The number of children n rquals the number of resizable |
| 3655 | children of this window + 1 because we know window itself |
| 3656 | is resizable (otherwise we would have signalled an error. */ |
| 3657 | |
| 3658 | struct window *w = XWINDOW (window); |
| 3659 | Lisp_Object s; |
| 3660 | int n = 1; |
| 3661 | |
| 3662 | for (s = w->next; !NILP (s); s = XWINDOW (s)->next) |
| 3663 | if (!window_fixed_size_p (XWINDOW (s), widthflag, 0)) |
| 3664 | ++n; |
| 3665 | for (s = w->prev; !NILP (s); s = XWINDOW (s)->prev) |
| 3666 | if (!window_fixed_size_p (XWINDOW (s), widthflag, 0)) |
| 3667 | ++n; |
| 3668 | |
| 3669 | delta1 = n * delta; |
| 3670 | |
| 3671 | /* Add delta1 lines or columns to this window, and to the parent, |
| 3672 | keeping things consistent while not affecting siblings. */ |
| 3673 | XSETINT (CURSIZE (parent), opht + delta1); |
| 3674 | (*setsizefun) (window, XINT (*sizep) + delta1, 0); |
| 3675 | |
| 3676 | /* Squeeze out delta1 lines or columns from our parent, |
| 3677 | shriking this window and siblings proportionately. |
| 3678 | This brings parent back to correct size. |
| 3679 | Delta1 was calculated so this makes this window the desired size, |
| 3680 | taking it all out of the siblings. */ |
| 3681 | (*setsizefun) (parent, opht, 0); |
| 3682 | |
| 3683 | } |
| 3684 | } |
| 3685 | |
| 3686 | XSETFASTINT (p->last_modified, 0); |
| 3687 | XSETFASTINT (p->last_overlay_modified, 0); |
| 3688 | |
| 3689 | /* Adjust glyph matrices. */ |
| 3690 | adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window)))); |
| 3691 | } |
| 3692 | |
| 3693 | #undef CURBEG |
| 3694 | #undef CURSIZE |
| 3695 | |
| 3696 | |
| 3697 | \f |
| 3698 | /*********************************************************************** |
| 3699 | Resizing Mini-Windows |
| 3700 | ***********************************************************************/ |
| 3701 | |
| 3702 | static void shrink_window_lowest_first P_ ((struct window *, int)); |
| 3703 | |
| 3704 | enum save_restore_action |
| 3705 | { |
| 3706 | CHECK_ORIG_SIZES, |
| 3707 | SAVE_ORIG_SIZES, |
| 3708 | RESTORE_ORIG_SIZES |
| 3709 | }; |
| 3710 | |
| 3711 | static int save_restore_orig_size P_ ((struct window *, |
| 3712 | enum save_restore_action)); |
| 3713 | |
| 3714 | /* Shrink windows rooted in window W to HEIGHT. Take the space needed |
| 3715 | from lowest windows first. */ |
| 3716 | |
| 3717 | static void |
| 3718 | shrink_window_lowest_first (w, height) |
| 3719 | struct window *w; |
| 3720 | int height; |
| 3721 | { |
| 3722 | struct window *c; |
| 3723 | Lisp_Object child; |
| 3724 | int old_height; |
| 3725 | |
| 3726 | xassert (!MINI_WINDOW_P (w)); |
| 3727 | |
| 3728 | /* Set redisplay hints. */ |
| 3729 | XSETFASTINT (w->last_modified, 0); |
| 3730 | XSETFASTINT (w->last_overlay_modified, 0); |
| 3731 | windows_or_buffers_changed++; |
| 3732 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1; |
| 3733 | |
| 3734 | old_height = XFASTINT (w->height); |
| 3735 | XSETFASTINT (w->height, height); |
| 3736 | |
| 3737 | if (!NILP (w->hchild)) |
| 3738 | { |
| 3739 | for (child = w->hchild; !NILP (child); child = c->next) |
| 3740 | { |
| 3741 | c = XWINDOW (child); |
| 3742 | c->top = w->top; |
| 3743 | shrink_window_lowest_first (c, height); |
| 3744 | } |
| 3745 | } |
| 3746 | else if (!NILP (w->vchild)) |
| 3747 | { |
| 3748 | Lisp_Object last_child; |
| 3749 | int delta = old_height - height; |
| 3750 | int last_top; |
| 3751 | |
| 3752 | last_child = Qnil; |
| 3753 | |
| 3754 | /* Find the last child. We are taking space from lowest windows |
| 3755 | first, so we iterate over children from the last child |
| 3756 | backwards. */ |
| 3757 | for (child = w->vchild; !NILP (child); child = XWINDOW (child)->next) |
| 3758 | last_child = child; |
| 3759 | |
| 3760 | /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */ |
| 3761 | for (child = last_child; delta && !NILP (child); child = c->prev) |
| 3762 | { |
| 3763 | int this_one; |
| 3764 | |
| 3765 | c = XWINDOW (child); |
| 3766 | this_one = XFASTINT (c->height) - MIN_SAFE_WINDOW_HEIGHT; |
| 3767 | |
| 3768 | if (this_one > delta) |
| 3769 | this_one = delta; |
| 3770 | |
| 3771 | shrink_window_lowest_first (c, XFASTINT (c->height) - this_one); |
| 3772 | delta -= this_one; |
| 3773 | } |
| 3774 | |
| 3775 | /* Compute new positions. */ |
| 3776 | last_top = XINT (w->top); |
| 3777 | for (child = w->vchild; !NILP (child); child = c->next) |
| 3778 | { |
| 3779 | c = XWINDOW (child); |
| 3780 | c->top = make_number (last_top); |
| 3781 | shrink_window_lowest_first (c, XFASTINT (c->height)); |
| 3782 | last_top += XFASTINT (c->height); |
| 3783 | } |
| 3784 | } |
| 3785 | } |
| 3786 | |
| 3787 | |
| 3788 | /* Save, restore, or check positions and sizes in the window tree |
| 3789 | rooted at W. ACTION says what to do. |
| 3790 | |
| 3791 | If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height |
| 3792 | members are valid for all windows in the window tree. Value is |
| 3793 | non-zero if they are valid. |
| 3794 | |
| 3795 | If ACTION is SAVE_ORIG_SIZES, save members top and height in |
| 3796 | orig_top and orig_height for all windows in the tree. |
| 3797 | |
| 3798 | If ACTION is RESTORE_ORIG_SIZES, restore top and height from |
| 3799 | values stored in orig_top and orig_height for all windows. */ |
| 3800 | |
| 3801 | static int |
| 3802 | save_restore_orig_size (w, action) |
| 3803 | struct window *w; |
| 3804 | enum save_restore_action action; |
| 3805 | { |
| 3806 | int success_p = 1; |
| 3807 | |
| 3808 | while (w) |
| 3809 | { |
| 3810 | if (!NILP (w->hchild)) |
| 3811 | { |
| 3812 | if (!save_restore_orig_size (XWINDOW (w->hchild), action)) |
| 3813 | success_p = 0; |
| 3814 | } |
| 3815 | else if (!NILP (w->vchild)) |
| 3816 | { |
| 3817 | if (!save_restore_orig_size (XWINDOW (w->vchild), action)) |
| 3818 | success_p = 0; |
| 3819 | } |
| 3820 | |
| 3821 | switch (action) |
| 3822 | { |
| 3823 | case CHECK_ORIG_SIZES: |
| 3824 | if (!INTEGERP (w->orig_top) || !INTEGERP (w->orig_height)) |
| 3825 | return 0; |
| 3826 | break; |
| 3827 | |
| 3828 | case SAVE_ORIG_SIZES: |
| 3829 | w->orig_top = w->top; |
| 3830 | w->orig_height = w->height; |
| 3831 | XSETFASTINT (w->last_modified, 0); |
| 3832 | XSETFASTINT (w->last_overlay_modified, 0); |
| 3833 | break; |
| 3834 | |
| 3835 | case RESTORE_ORIG_SIZES: |
| 3836 | xassert (INTEGERP (w->orig_top) && INTEGERP (w->orig_height)); |
| 3837 | w->top = w->orig_top; |
| 3838 | w->height = w->orig_height; |
| 3839 | w->orig_height = w->orig_top = Qnil; |
| 3840 | XSETFASTINT (w->last_modified, 0); |
| 3841 | XSETFASTINT (w->last_overlay_modified, 0); |
| 3842 | break; |
| 3843 | |
| 3844 | default: |
| 3845 | abort (); |
| 3846 | } |
| 3847 | |
| 3848 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
| 3849 | } |
| 3850 | |
| 3851 | return success_p; |
| 3852 | } |
| 3853 | |
| 3854 | |
| 3855 | /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can |
| 3856 | without deleting other windows. */ |
| 3857 | |
| 3858 | void |
| 3859 | grow_mini_window (w, delta) |
| 3860 | struct window *w; |
| 3861 | int delta; |
| 3862 | { |
| 3863 | struct frame *f = XFRAME (w->frame); |
| 3864 | struct window *root; |
| 3865 | |
| 3866 | xassert (MINI_WINDOW_P (w)); |
| 3867 | xassert (delta >= 0); |
| 3868 | |
| 3869 | /* Check values of window_min_width and window_min_height for |
| 3870 | validity. */ |
| 3871 | check_min_window_sizes (); |
| 3872 | |
| 3873 | /* Compute how much we can enlarge the mini-window without deleting |
| 3874 | other windows. */ |
| 3875 | root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 3876 | if (delta) |
| 3877 | { |
| 3878 | int min_height = window_min_size (root, 0, 0, 0); |
| 3879 | if (XFASTINT (root->height) - delta < min_height) |
| 3880 | /* Note that the root window may already be smaller than |
| 3881 | min_height. */ |
| 3882 | delta = max (0, XFASTINT (root->height) - min_height); |
| 3883 | } |
| 3884 | |
| 3885 | if (delta) |
| 3886 | { |
| 3887 | /* Save original window sizes and positions, if not already done. */ |
| 3888 | if (!save_restore_orig_size (root, CHECK_ORIG_SIZES)) |
| 3889 | save_restore_orig_size (root, SAVE_ORIG_SIZES); |
| 3890 | |
| 3891 | /* Shrink other windows. */ |
| 3892 | shrink_window_lowest_first (root, XFASTINT (root->height) - delta); |
| 3893 | |
| 3894 | /* Grow the mini-window. */ |
| 3895 | w->top = make_number (XFASTINT (root->top) + XFASTINT (root->height)); |
| 3896 | w->height = make_number (XFASTINT (w->height) + delta); |
| 3897 | XSETFASTINT (w->last_modified, 0); |
| 3898 | XSETFASTINT (w->last_overlay_modified, 0); |
| 3899 | |
| 3900 | adjust_glyphs (f); |
| 3901 | } |
| 3902 | } |
| 3903 | |
| 3904 | |
| 3905 | /* Shrink mini-window W. If there is recorded info about window sizes |
| 3906 | before a call to grow_mini_window, restore recorded window sizes. |
| 3907 | Otherwise, if the mini-window is higher than 1 line, resize it to 1 |
| 3908 | line. */ |
| 3909 | |
| 3910 | void |
| 3911 | shrink_mini_window (w) |
| 3912 | struct window *w; |
| 3913 | { |
| 3914 | struct frame *f = XFRAME (w->frame); |
| 3915 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 3916 | |
| 3917 | if (save_restore_orig_size (root, CHECK_ORIG_SIZES)) |
| 3918 | { |
| 3919 | save_restore_orig_size (root, RESTORE_ORIG_SIZES); |
| 3920 | adjust_glyphs (f); |
| 3921 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 3922 | windows_or_buffers_changed = 1; |
| 3923 | } |
| 3924 | else if (XFASTINT (w->height) > 1) |
| 3925 | { |
| 3926 | /* Distribute the additional lines of the mini-window |
| 3927 | among the other windows. */ |
| 3928 | Lisp_Object window; |
| 3929 | XSETWINDOW (window, w); |
| 3930 | enlarge_window (window, 1 - XFASTINT (w->height), 0, 0); |
| 3931 | } |
| 3932 | } |
| 3933 | |
| 3934 | |
| 3935 | \f |
| 3936 | /* Mark window cursors off for all windows in the window tree rooted |
| 3937 | at W by setting their phys_cursor_on_p flag to zero. Called from |
| 3938 | xterm.c, e.g. when a frame is cleared and thereby all cursors on |
| 3939 | the frame are cleared. */ |
| 3940 | |
| 3941 | void |
| 3942 | mark_window_cursors_off (w) |
| 3943 | struct window *w; |
| 3944 | { |
| 3945 | while (w) |
| 3946 | { |
| 3947 | if (!NILP (w->hchild)) |
| 3948 | mark_window_cursors_off (XWINDOW (w->hchild)); |
| 3949 | else if (!NILP (w->vchild)) |
| 3950 | mark_window_cursors_off (XWINDOW (w->vchild)); |
| 3951 | else |
| 3952 | w->phys_cursor_on_p = 0; |
| 3953 | |
| 3954 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 3955 | } |
| 3956 | } |
| 3957 | |
| 3958 | |
| 3959 | /* Return number of lines of text (not counting mode lines) in W. */ |
| 3960 | |
| 3961 | int |
| 3962 | window_internal_height (w) |
| 3963 | struct window *w; |
| 3964 | { |
| 3965 | int ht = XFASTINT (w->height); |
| 3966 | |
| 3967 | if (!MINI_WINDOW_P (w)) |
| 3968 | { |
| 3969 | if (!NILP (w->parent) |
| 3970 | || !NILP (w->vchild) |
| 3971 | || !NILP (w->hchild) |
| 3972 | || !NILP (w->next) |
| 3973 | || !NILP (w->prev) |
| 3974 | || WINDOW_WANTS_MODELINE_P (w)) |
| 3975 | --ht; |
| 3976 | |
| 3977 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
| 3978 | --ht; |
| 3979 | } |
| 3980 | |
| 3981 | return ht; |
| 3982 | } |
| 3983 | |
| 3984 | |
| 3985 | /* Return the number of columns in W. |
| 3986 | Don't count columns occupied by scroll bars or the vertical bar |
| 3987 | separating W from the sibling to its right. */ |
| 3988 | |
| 3989 | int |
| 3990 | window_internal_width (w) |
| 3991 | struct window *w; |
| 3992 | { |
| 3993 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 3994 | int width = XINT (w->width); |
| 3995 | |
| 3996 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
| 3997 | /* Scroll bars occupy a few columns. */ |
| 3998 | width -= FRAME_SCROLL_BAR_COLS (f); |
| 3999 | else if (!WINDOW_RIGHTMOST_P (w) && !WINDOW_FULL_WIDTH_P (w)) |
| 4000 | /* The column of `|' characters separating side-by-side windows |
| 4001 | occupies one column only. */ |
| 4002 | width -= 1; |
| 4003 | |
| 4004 | /* On window-systems, areas to the left and right of the window |
| 4005 | are used as fringes. */ |
| 4006 | if (FRAME_WINDOW_P (f)) |
| 4007 | width -= FRAME_FRINGE_COLS (f); |
| 4008 | |
| 4009 | return width; |
| 4010 | } |
| 4011 | |
| 4012 | \f |
| 4013 | /************************************************************************ |
| 4014 | Window Scrolling |
| 4015 | ***********************************************************************/ |
| 4016 | |
| 4017 | /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll |
| 4018 | N screen-fulls, which is defined as the height of the window minus |
| 4019 | next_screen_context_lines. If WHOLE is zero, scroll up N lines |
| 4020 | instead. Negative values of N mean scroll down. NOERROR non-zero |
| 4021 | means don't signal an error if we try to move over BEGV or ZV, |
| 4022 | respectively. */ |
| 4023 | |
| 4024 | static void |
| 4025 | window_scroll (window, n, whole, noerror) |
| 4026 | Lisp_Object window; |
| 4027 | int n; |
| 4028 | int whole; |
| 4029 | int noerror; |
| 4030 | { |
| 4031 | /* If we must, use the pixel-based version which is much slower than |
| 4032 | the line-based one but can handle varying line heights. */ |
| 4033 | if (FRAME_WINDOW_P (XFRAME (XWINDOW (window)->frame))) |
| 4034 | window_scroll_pixel_based (window, n, whole, noerror); |
| 4035 | else |
| 4036 | window_scroll_line_based (window, n, whole, noerror); |
| 4037 | } |
| 4038 | |
| 4039 | |
| 4040 | /* Implementation of window_scroll that works based on pixel line |
| 4041 | heights. See the comment of window_scroll for parameter |
| 4042 | descriptions. */ |
| 4043 | |
| 4044 | static void |
| 4045 | window_scroll_pixel_based (window, n, whole, noerror) |
| 4046 | Lisp_Object window; |
| 4047 | int n; |
| 4048 | int whole; |
| 4049 | int noerror; |
| 4050 | { |
| 4051 | struct it it; |
| 4052 | struct window *w = XWINDOW (window); |
| 4053 | struct text_pos start; |
| 4054 | Lisp_Object tem; |
| 4055 | int this_scroll_margin; |
| 4056 | int preserve_y; |
| 4057 | /* True if we fiddled the window vscroll field without really scrolling. */ |
| 4058 | int vscrolled = 0; |
| 4059 | |
| 4060 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 4061 | |
| 4062 | /* If PT is not visible in WINDOW, move back one half of |
| 4063 | the screen. Allow PT to be partially visible, otherwise |
| 4064 | something like (scroll-down 1) with PT in the line before |
| 4065 | the partially visible one would recenter. */ |
| 4066 | tem = Fpos_visible_in_window_p (make_number (PT), window, Qt); |
| 4067 | if (NILP (tem)) |
| 4068 | { |
| 4069 | /* Move backward half the height of the window. Performance note: |
| 4070 | vmotion used here is about 10% faster, but would give wrong |
| 4071 | results for variable height lines. */ |
| 4072 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); |
| 4073 | it.current_y = it.last_visible_y; |
| 4074 | move_it_vertically (&it, - window_box_height (w) / 2); |
| 4075 | |
| 4076 | /* The function move_iterator_vertically may move over more than |
| 4077 | the specified y-distance. If it->w is small, e.g. a |
| 4078 | mini-buffer window, we may end up in front of the window's |
| 4079 | display area. This is the case when Start displaying at the |
| 4080 | start of the line containing PT in this case. */ |
| 4081 | if (it.current_y <= 0) |
| 4082 | { |
| 4083 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); |
| 4084 | move_it_vertically (&it, 0); |
| 4085 | it.current_y = 0; |
| 4086 | } |
| 4087 | |
| 4088 | start = it.current.pos; |
| 4089 | } |
| 4090 | |
| 4091 | /* If scroll_preserve_screen_position is non-zero, we try to set |
| 4092 | point in the same window line as it is now, so get that line. */ |
| 4093 | if (!NILP (Vscroll_preserve_screen_position)) |
| 4094 | { |
| 4095 | start_display (&it, w, start); |
| 4096 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); |
| 4097 | preserve_y = it.current_y; |
| 4098 | } |
| 4099 | else |
| 4100 | preserve_y = -1; |
| 4101 | |
| 4102 | /* Move iterator it from start the specified distance forward or |
| 4103 | backward. The result is the new window start. */ |
| 4104 | start_display (&it, w, start); |
| 4105 | if (whole) |
| 4106 | { |
| 4107 | int screen_full = (window_box_height (w) |
| 4108 | - next_screen_context_lines * CANON_Y_UNIT (it.f)); |
| 4109 | int dy = n * screen_full; |
| 4110 | |
| 4111 | /* Note that move_it_vertically always moves the iterator to the |
| 4112 | start of a line. So, if the last line doesn't have a newline, |
| 4113 | we would end up at the start of the line ending at ZV. */ |
| 4114 | if (dy <= 0) |
| 4115 | move_it_vertically_backward (&it, -dy); |
| 4116 | else if (dy > 0) |
| 4117 | move_it_to (&it, ZV, -1, it.current_y + dy, -1, |
| 4118 | MOVE_TO_POS | MOVE_TO_Y); |
| 4119 | } |
| 4120 | else |
| 4121 | move_it_by_lines (&it, n, 1); |
| 4122 | |
| 4123 | /* End if we end up at ZV or BEGV. */ |
| 4124 | if ((n > 0 && IT_CHARPOS (it) == ZV) |
| 4125 | || (n < 0 && IT_CHARPOS (it) == CHARPOS (start))) |
| 4126 | { |
| 4127 | if (IT_CHARPOS (it) == ZV) |
| 4128 | { |
| 4129 | if (it.current_y + it.max_ascent + it.max_descent |
| 4130 | > it.last_visible_y) |
| 4131 | { |
| 4132 | /* The last line was only partially visible, make it fully |
| 4133 | visible. */ |
| 4134 | w->vscroll = (it.last_visible_y |
| 4135 | - it.current_y + it.max_ascent + it.max_descent); |
| 4136 | adjust_glyphs (it.f); |
| 4137 | } |
| 4138 | else if (noerror) |
| 4139 | return; |
| 4140 | else |
| 4141 | Fsignal (Qend_of_buffer, Qnil); |
| 4142 | } |
| 4143 | else |
| 4144 | { |
| 4145 | if (w->vscroll != 0) |
| 4146 | /* The first line was only partially visible, make it fully |
| 4147 | visible. */ |
| 4148 | w->vscroll = 0; |
| 4149 | else if (noerror) |
| 4150 | return; |
| 4151 | else |
| 4152 | Fsignal (Qbeginning_of_buffer, Qnil); |
| 4153 | } |
| 4154 | |
| 4155 | /* If control gets here, then we vscrolled. */ |
| 4156 | |
| 4157 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 4158 | |
| 4159 | /* Don't try to change the window start below. */ |
| 4160 | vscrolled = 1; |
| 4161 | } |
| 4162 | |
| 4163 | if (! vscrolled) |
| 4164 | { |
| 4165 | /* Set the window start, and set up the window for redisplay. */ |
| 4166 | set_marker_restricted (w->start, make_number (IT_CHARPOS (it)), |
| 4167 | w->buffer); |
| 4168 | w->start_at_line_beg = Fbolp (); |
| 4169 | w->update_mode_line = Qt; |
| 4170 | XSETFASTINT (w->last_modified, 0); |
| 4171 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4172 | /* Set force_start so that redisplay_window will run the |
| 4173 | window-scroll-functions. */ |
| 4174 | w->force_start = Qt; |
| 4175 | } |
| 4176 | |
| 4177 | it.current_y = it.vpos = 0; |
| 4178 | |
| 4179 | /* Preserve the screen position if we must. */ |
| 4180 | if (preserve_y >= 0) |
| 4181 | { |
| 4182 | move_it_to (&it, -1, -1, preserve_y, -1, MOVE_TO_Y); |
| 4183 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4184 | } |
| 4185 | else |
| 4186 | { |
| 4187 | /* Move PT out of scroll margins. */ |
| 4188 | this_scroll_margin = max (0, scroll_margin); |
| 4189 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); |
| 4190 | this_scroll_margin *= CANON_Y_UNIT (it.f); |
| 4191 | |
| 4192 | if (n > 0) |
| 4193 | { |
| 4194 | /* We moved the window start towards ZV, so PT may be now |
| 4195 | in the scroll margin at the top. */ |
| 4196 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); |
| 4197 | while (it.current_y < this_scroll_margin) |
| 4198 | { |
| 4199 | int prev = it.current_y; |
| 4200 | move_it_by_lines (&it, 1, 1); |
| 4201 | if (prev == it.current_y) |
| 4202 | break; |
| 4203 | } |
| 4204 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4205 | } |
| 4206 | else if (n < 0) |
| 4207 | { |
| 4208 | int charpos, bytepos; |
| 4209 | |
| 4210 | /* We moved the window start towards BEGV, so PT may be now |
| 4211 | in the scroll margin at the bottom. */ |
| 4212 | move_it_to (&it, PT, -1, |
| 4213 | it.last_visible_y - this_scroll_margin - 1, -1, |
| 4214 | MOVE_TO_POS | MOVE_TO_Y); |
| 4215 | |
| 4216 | /* Save our position, in case it's correct. */ |
| 4217 | charpos = IT_CHARPOS (it); |
| 4218 | bytepos = IT_BYTEPOS (it); |
| 4219 | |
| 4220 | /* See if point is on a partially visible line at the end. */ |
| 4221 | move_it_by_lines (&it, 1, 1); |
| 4222 | if (it.current_y > it.last_visible_y) |
| 4223 | /* The last line was only partially visible, so back up two |
| 4224 | lines to make sure we're on a fully visible line. */ |
| 4225 | { |
| 4226 | move_it_by_lines (&it, -2, 0); |
| 4227 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4228 | } |
| 4229 | else |
| 4230 | /* No, the position we saved is OK, so use it. */ |
| 4231 | SET_PT_BOTH (charpos, bytepos); |
| 4232 | } |
| 4233 | } |
| 4234 | } |
| 4235 | |
| 4236 | |
| 4237 | /* Implementation of window_scroll that works based on screen lines. |
| 4238 | See the comment of window_scroll for parameter descriptions. */ |
| 4239 | |
| 4240 | static void |
| 4241 | window_scroll_line_based (window, n, whole, noerror) |
| 4242 | Lisp_Object window; |
| 4243 | int n; |
| 4244 | int whole; |
| 4245 | int noerror; |
| 4246 | { |
| 4247 | register struct window *w = XWINDOW (window); |
| 4248 | register int opoint = PT, opoint_byte = PT_BYTE; |
| 4249 | register int pos, pos_byte; |
| 4250 | register int ht = window_internal_height (w); |
| 4251 | register Lisp_Object tem; |
| 4252 | int lose; |
| 4253 | Lisp_Object bolp; |
| 4254 | int startpos; |
| 4255 | struct position posit; |
| 4256 | int original_vpos; |
| 4257 | |
| 4258 | /* If scrolling screen-fulls, compute the number of lines to |
| 4259 | scroll from the window's height. */ |
| 4260 | if (whole) |
| 4261 | n *= max (1, ht - next_screen_context_lines); |
| 4262 | |
| 4263 | startpos = marker_position (w->start); |
| 4264 | |
| 4265 | posit = *compute_motion (startpos, 0, 0, 0, |
| 4266 | PT, ht, 0, |
| 4267 | window_internal_width (w), XINT (w->hscroll), |
| 4268 | 0, w); |
| 4269 | original_vpos = posit.vpos; |
| 4270 | |
| 4271 | XSETFASTINT (tem, PT); |
| 4272 | tem = Fpos_visible_in_window_p (tem, window, Qnil); |
| 4273 | |
| 4274 | if (NILP (tem)) |
| 4275 | { |
| 4276 | Fvertical_motion (make_number (- (ht / 2)), window); |
| 4277 | startpos = PT; |
| 4278 | } |
| 4279 | |
| 4280 | SET_PT (startpos); |
| 4281 | lose = n < 0 && PT == BEGV; |
| 4282 | Fvertical_motion (make_number (n), window); |
| 4283 | pos = PT; |
| 4284 | pos_byte = PT_BYTE; |
| 4285 | bolp = Fbolp (); |
| 4286 | SET_PT_BOTH (opoint, opoint_byte); |
| 4287 | |
| 4288 | if (lose) |
| 4289 | { |
| 4290 | if (noerror) |
| 4291 | return; |
| 4292 | else |
| 4293 | Fsignal (Qbeginning_of_buffer, Qnil); |
| 4294 | } |
| 4295 | |
| 4296 | if (pos < ZV) |
| 4297 | { |
| 4298 | int this_scroll_margin = scroll_margin; |
| 4299 | |
| 4300 | /* Don't use a scroll margin that is negative or too large. */ |
| 4301 | if (this_scroll_margin < 0) |
| 4302 | this_scroll_margin = 0; |
| 4303 | |
| 4304 | if (XINT (w->height) < 4 * scroll_margin) |
| 4305 | this_scroll_margin = XINT (w->height) / 4; |
| 4306 | |
| 4307 | set_marker_restricted_both (w->start, w->buffer, pos, pos_byte); |
| 4308 | w->start_at_line_beg = bolp; |
| 4309 | w->update_mode_line = Qt; |
| 4310 | XSETFASTINT (w->last_modified, 0); |
| 4311 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4312 | /* Set force_start so that redisplay_window will run |
| 4313 | the window-scroll-functions. */ |
| 4314 | w->force_start = Qt; |
| 4315 | |
| 4316 | if (whole && !NILP (Vscroll_preserve_screen_position)) |
| 4317 | { |
| 4318 | SET_PT_BOTH (pos, pos_byte); |
| 4319 | Fvertical_motion (make_number (original_vpos), window); |
| 4320 | } |
| 4321 | /* If we scrolled forward, put point enough lines down |
| 4322 | that it is outside the scroll margin. */ |
| 4323 | else if (n > 0) |
| 4324 | { |
| 4325 | int top_margin; |
| 4326 | |
| 4327 | if (this_scroll_margin > 0) |
| 4328 | { |
| 4329 | SET_PT_BOTH (pos, pos_byte); |
| 4330 | Fvertical_motion (make_number (this_scroll_margin), window); |
| 4331 | top_margin = PT; |
| 4332 | } |
| 4333 | else |
| 4334 | top_margin = pos; |
| 4335 | |
| 4336 | if (top_margin <= opoint) |
| 4337 | SET_PT_BOTH (opoint, opoint_byte); |
| 4338 | else if (!NILP (Vscroll_preserve_screen_position)) |
| 4339 | { |
| 4340 | SET_PT_BOTH (pos, pos_byte); |
| 4341 | Fvertical_motion (make_number (original_vpos), window); |
| 4342 | } |
| 4343 | else |
| 4344 | SET_PT (top_margin); |
| 4345 | } |
| 4346 | else if (n < 0) |
| 4347 | { |
| 4348 | int bottom_margin; |
| 4349 | |
| 4350 | /* If we scrolled backward, put point near the end of the window |
| 4351 | but not within the scroll margin. */ |
| 4352 | SET_PT_BOTH (pos, pos_byte); |
| 4353 | tem = Fvertical_motion (make_number (ht - this_scroll_margin), window); |
| 4354 | if (XFASTINT (tem) == ht - this_scroll_margin) |
| 4355 | bottom_margin = PT; |
| 4356 | else |
| 4357 | bottom_margin = PT + 1; |
| 4358 | |
| 4359 | if (bottom_margin > opoint) |
| 4360 | SET_PT_BOTH (opoint, opoint_byte); |
| 4361 | else |
| 4362 | { |
| 4363 | if (!NILP (Vscroll_preserve_screen_position)) |
| 4364 | { |
| 4365 | SET_PT_BOTH (pos, pos_byte); |
| 4366 | Fvertical_motion (make_number (original_vpos), window); |
| 4367 | } |
| 4368 | else |
| 4369 | Fvertical_motion (make_number (-1), window); |
| 4370 | } |
| 4371 | } |
| 4372 | } |
| 4373 | else |
| 4374 | { |
| 4375 | if (noerror) |
| 4376 | return; |
| 4377 | else |
| 4378 | Fsignal (Qend_of_buffer, Qnil); |
| 4379 | } |
| 4380 | } |
| 4381 | |
| 4382 | |
| 4383 | /* Scroll selected_window up or down. If N is nil, scroll a |
| 4384 | screen-full which is defined as the height of the window minus |
| 4385 | next_screen_context_lines. If N is the symbol `-', scroll. |
| 4386 | DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll |
| 4387 | up. This is the guts of Fscroll_up and Fscroll_down. */ |
| 4388 | |
| 4389 | static void |
| 4390 | scroll_command (n, direction) |
| 4391 | Lisp_Object n; |
| 4392 | int direction; |
| 4393 | { |
| 4394 | int count = BINDING_STACK_SIZE (); |
| 4395 | |
| 4396 | xassert (abs (direction) == 1); |
| 4397 | |
| 4398 | /* If selected window's buffer isn't current, make it current for |
| 4399 | the moment. But don't screw up if window_scroll gets an error. */ |
| 4400 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) |
| 4401 | { |
| 4402 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 4403 | Fset_buffer (XWINDOW (selected_window)->buffer); |
| 4404 | |
| 4405 | /* Make redisplay consider other windows than just selected_window. */ |
| 4406 | ++windows_or_buffers_changed; |
| 4407 | } |
| 4408 | |
| 4409 | if (NILP (n)) |
| 4410 | window_scroll (selected_window, direction, 1, 0); |
| 4411 | else if (EQ (n, Qminus)) |
| 4412 | window_scroll (selected_window, -direction, 1, 0); |
| 4413 | else |
| 4414 | { |
| 4415 | n = Fprefix_numeric_value (n); |
| 4416 | window_scroll (selected_window, XINT (n) * direction, 0, 0); |
| 4417 | } |
| 4418 | |
| 4419 | unbind_to (count, Qnil); |
| 4420 | } |
| 4421 | |
| 4422 | DEFUN ("scroll-up", Fscroll_up, Sscroll_up, 0, 1, "P", |
| 4423 | doc: /* Scroll text of current window upward ARG lines; or near full screen if no ARG. |
| 4424 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 4425 | Negative ARG means scroll downward. |
| 4426 | If ARG is the atom `-', scroll downward by nearly full screen. |
| 4427 | When calling from a program, supply as argument a number, nil, or `-'. */) |
| 4428 | (arg) |
| 4429 | Lisp_Object arg; |
| 4430 | { |
| 4431 | scroll_command (arg, 1); |
| 4432 | return Qnil; |
| 4433 | } |
| 4434 | |
| 4435 | DEFUN ("scroll-down", Fscroll_down, Sscroll_down, 0, 1, "P", |
| 4436 | doc: /* Scroll text of current window down ARG lines; or near full screen if no ARG. |
| 4437 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 4438 | Negative ARG means scroll upward. |
| 4439 | If ARG is the atom `-', scroll upward by nearly full screen. |
| 4440 | When calling from a program, supply as argument a number, nil, or `-'. */) |
| 4441 | (arg) |
| 4442 | Lisp_Object arg; |
| 4443 | { |
| 4444 | scroll_command (arg, -1); |
| 4445 | return Qnil; |
| 4446 | } |
| 4447 | \f |
| 4448 | DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling, Sother_window_for_scrolling, 0, 0, 0, |
| 4449 | doc: /* Return the other window for \"other window scroll\" commands. |
| 4450 | If in the minibuffer, `minibuffer-scroll-window' if non-nil |
| 4451 | specifies the window. |
| 4452 | If `other-window-scroll-buffer' is non-nil, a window |
| 4453 | showing that buffer is used. */) |
| 4454 | () |
| 4455 | { |
| 4456 | Lisp_Object window; |
| 4457 | |
| 4458 | if (MINI_WINDOW_P (XWINDOW (selected_window)) |
| 4459 | && !NILP (Vminibuf_scroll_window)) |
| 4460 | window = Vminibuf_scroll_window; |
| 4461 | /* If buffer is specified, scroll that buffer. */ |
| 4462 | else if (!NILP (Vother_window_scroll_buffer)) |
| 4463 | { |
| 4464 | window = Fget_buffer_window (Vother_window_scroll_buffer, Qnil); |
| 4465 | if (NILP (window)) |
| 4466 | window = Fdisplay_buffer (Vother_window_scroll_buffer, Qt, Qnil); |
| 4467 | } |
| 4468 | else |
| 4469 | { |
| 4470 | /* Nothing specified; look for a neighboring window on the same |
| 4471 | frame. */ |
| 4472 | window = Fnext_window (selected_window, Qnil, Qnil); |
| 4473 | |
| 4474 | if (EQ (window, selected_window)) |
| 4475 | /* That didn't get us anywhere; look for a window on another |
| 4476 | visible frame. */ |
| 4477 | do |
| 4478 | window = Fnext_window (window, Qnil, Qt); |
| 4479 | while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window)))) |
| 4480 | && ! EQ (window, selected_window)); |
| 4481 | } |
| 4482 | |
| 4483 | CHECK_LIVE_WINDOW (window); |
| 4484 | |
| 4485 | if (EQ (window, selected_window)) |
| 4486 | error ("There is no other window"); |
| 4487 | |
| 4488 | return window; |
| 4489 | } |
| 4490 | |
| 4491 | DEFUN ("scroll-other-window", Fscroll_other_window, Sscroll_other_window, 0, 1, "P", |
| 4492 | doc: /* Scroll next window upward ARG lines; or near full screen if no ARG. |
| 4493 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 4494 | The next window is the one below the current one; or the one at the top |
| 4495 | if the current one is at the bottom. Negative ARG means scroll downward. |
| 4496 | If ARG is the atom `-', scroll downward by nearly full screen. |
| 4497 | When calling from a program, supply as argument a number, nil, or `-'. |
| 4498 | |
| 4499 | If in the minibuffer, `minibuffer-scroll-window' if non-nil |
| 4500 | specifies the window to scroll. |
| 4501 | If `other-window-scroll-buffer' is non-nil, scroll the window |
| 4502 | showing that buffer, popping the buffer up if necessary. */) |
| 4503 | (arg) |
| 4504 | Lisp_Object arg; |
| 4505 | { |
| 4506 | Lisp_Object window; |
| 4507 | struct window *w; |
| 4508 | int count = BINDING_STACK_SIZE (); |
| 4509 | |
| 4510 | window = Fother_window_for_scrolling (); |
| 4511 | w = XWINDOW (window); |
| 4512 | |
| 4513 | /* Don't screw up if window_scroll gets an error. */ |
| 4514 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 4515 | ++windows_or_buffers_changed; |
| 4516 | |
| 4517 | Fset_buffer (w->buffer); |
| 4518 | SET_PT (marker_position (w->pointm)); |
| 4519 | |
| 4520 | if (NILP (arg)) |
| 4521 | window_scroll (window, 1, 1, 1); |
| 4522 | else if (EQ (arg, Qminus)) |
| 4523 | window_scroll (window, -1, 1, 1); |
| 4524 | else |
| 4525 | { |
| 4526 | if (CONSP (arg)) |
| 4527 | arg = Fcar (arg); |
| 4528 | CHECK_NUMBER (arg); |
| 4529 | window_scroll (window, XINT (arg), 0, 1); |
| 4530 | } |
| 4531 | |
| 4532 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
| 4533 | unbind_to (count, Qnil); |
| 4534 | |
| 4535 | return Qnil; |
| 4536 | } |
| 4537 | \f |
| 4538 | DEFUN ("scroll-left", Fscroll_left, Sscroll_left, 0, 1, "P", |
| 4539 | doc: /* Scroll selected window display ARG columns left. |
| 4540 | Default for ARG is window width minus 2. |
| 4541 | Value is the total amount of leftward horizontal scrolling in |
| 4542 | effect after the change. |
| 4543 | If `automatic-hscrolling' is non-nil, the argument ARG modifies |
| 4544 | a lower bound for automatic scrolling, i.e. automatic scrolling |
| 4545 | will not scroll a window to a column less than the value returned |
| 4546 | by this function. */) |
| 4547 | (arg) |
| 4548 | register Lisp_Object arg; |
| 4549 | { |
| 4550 | Lisp_Object result; |
| 4551 | int hscroll; |
| 4552 | struct window *w = XWINDOW (selected_window); |
| 4553 | |
| 4554 | if (NILP (arg)) |
| 4555 | XSETFASTINT (arg, window_internal_width (w) - 2); |
| 4556 | else |
| 4557 | arg = Fprefix_numeric_value (arg); |
| 4558 | |
| 4559 | hscroll = XINT (w->hscroll) + XINT (arg); |
| 4560 | result = Fset_window_hscroll (selected_window, make_number (hscroll)); |
| 4561 | |
| 4562 | if (interactive_p (0)) |
| 4563 | w->min_hscroll = w->hscroll; |
| 4564 | |
| 4565 | return result; |
| 4566 | } |
| 4567 | |
| 4568 | DEFUN ("scroll-right", Fscroll_right, Sscroll_right, 0, 1, "P", |
| 4569 | doc: /* Scroll selected window display ARG columns right. |
| 4570 | Default for ARG is window width minus 2. |
| 4571 | Value is the total amount of leftward horizontal scrolling in |
| 4572 | effect after the change. |
| 4573 | If `automatic-hscrolling' is non-nil, the argument ARG modifies |
| 4574 | a lower bound for automatic scrolling, i.e. automatic scrolling |
| 4575 | will not scroll a window to a column less than the value returned |
| 4576 | by this function. */) |
| 4577 | (arg) |
| 4578 | register Lisp_Object arg; |
| 4579 | { |
| 4580 | Lisp_Object result; |
| 4581 | int hscroll; |
| 4582 | struct window *w = XWINDOW (selected_window); |
| 4583 | |
| 4584 | if (NILP (arg)) |
| 4585 | XSETFASTINT (arg, window_internal_width (w) - 2); |
| 4586 | else |
| 4587 | arg = Fprefix_numeric_value (arg); |
| 4588 | |
| 4589 | hscroll = XINT (w->hscroll) - XINT (arg); |
| 4590 | result = Fset_window_hscroll (selected_window, make_number (hscroll)); |
| 4591 | |
| 4592 | if (interactive_p (0)) |
| 4593 | w->min_hscroll = w->hscroll; |
| 4594 | |
| 4595 | return result; |
| 4596 | } |
| 4597 | |
| 4598 | DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window, Sminibuffer_selected_window, 0, 0, 0, |
| 4599 | doc: /* Return the window which was selected when entering the minibuffer. |
| 4600 | Returns nil, if current window is not a minibuffer window. */) |
| 4601 | () |
| 4602 | { |
| 4603 | if (minibuf_level > 0 |
| 4604 | && MINI_WINDOW_P (XWINDOW (selected_window)) |
| 4605 | && !NILP (minibuf_selected_window) |
| 4606 | && WINDOW_LIVE_P (minibuf_selected_window)) |
| 4607 | return minibuf_selected_window; |
| 4608 | |
| 4609 | return Qnil; |
| 4610 | } |
| 4611 | |
| 4612 | /* Value is the number of lines actually displayed in window W, |
| 4613 | as opposed to its height. */ |
| 4614 | |
| 4615 | static int |
| 4616 | displayed_window_lines (w) |
| 4617 | struct window *w; |
| 4618 | { |
| 4619 | struct it it; |
| 4620 | struct text_pos start; |
| 4621 | int height = window_box_height (w); |
| 4622 | struct buffer *old_buffer; |
| 4623 | int bottom_y; |
| 4624 | |
| 4625 | if (XBUFFER (w->buffer) != current_buffer) |
| 4626 | { |
| 4627 | old_buffer = current_buffer; |
| 4628 | set_buffer_internal (XBUFFER (w->buffer)); |
| 4629 | } |
| 4630 | else |
| 4631 | old_buffer = NULL; |
| 4632 | |
| 4633 | /* In case W->start is out of the accessible range, do something |
| 4634 | reasonable. This happens in Info mode when Info-scroll-down |
| 4635 | calls (recenter -1) while W->start is 1. */ |
| 4636 | if (XMARKER (w->start)->charpos < BEGV) |
| 4637 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); |
| 4638 | else if (XMARKER (w->start)->charpos > ZV) |
| 4639 | SET_TEXT_POS (start, ZV, ZV_BYTE); |
| 4640 | else |
| 4641 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 4642 | |
| 4643 | start_display (&it, w, start); |
| 4644 | move_it_vertically (&it, height); |
| 4645 | bottom_y = line_bottom_y (&it); |
| 4646 | |
| 4647 | /* Add in empty lines at the bottom of the window. */ |
| 4648 | if (bottom_y < height) |
| 4649 | { |
| 4650 | int uy = CANON_Y_UNIT (it.f); |
| 4651 | it.vpos += (height - bottom_y + uy - 1) / uy; |
| 4652 | } |
| 4653 | |
| 4654 | if (old_buffer) |
| 4655 | set_buffer_internal (old_buffer); |
| 4656 | |
| 4657 | return it.vpos; |
| 4658 | } |
| 4659 | |
| 4660 | |
| 4661 | DEFUN ("recenter", Frecenter, Srecenter, 0, 1, "P", |
| 4662 | doc: /* Center point in window and redisplay frame. |
| 4663 | With prefix argument ARG, recenter putting point on screen line ARG |
| 4664 | relative to the current window. If ARG is negative, it counts up from the |
| 4665 | bottom of the window. (ARG should be less than the height of the window.) |
| 4666 | |
| 4667 | If ARG is omitted or nil, erase the entire frame and then |
| 4668 | redraw with point in the center of the current window. |
| 4669 | Just C-u as prefix means put point in the center of the window |
| 4670 | and redisplay normally--don't erase and redraw the frame. */) |
| 4671 | (arg) |
| 4672 | register Lisp_Object arg; |
| 4673 | { |
| 4674 | struct window *w = XWINDOW (selected_window); |
| 4675 | struct buffer *buf = XBUFFER (w->buffer); |
| 4676 | struct buffer *obuf = current_buffer; |
| 4677 | int center_p = 0; |
| 4678 | int charpos, bytepos; |
| 4679 | |
| 4680 | /* If redisplay is suppressed due to an error, try again. */ |
| 4681 | obuf->display_error_modiff = 0; |
| 4682 | |
| 4683 | if (NILP (arg)) |
| 4684 | { |
| 4685 | int i; |
| 4686 | |
| 4687 | /* Invalidate pixel data calculated for all compositions. */ |
| 4688 | for (i = 0; i < n_compositions; i++) |
| 4689 | composition_table[i]->font = NULL; |
| 4690 | |
| 4691 | Fredraw_frame (w->frame); |
| 4692 | SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w))); |
| 4693 | center_p = 1; |
| 4694 | } |
| 4695 | else if (CONSP (arg)) /* Just C-u. */ |
| 4696 | center_p = 1; |
| 4697 | else |
| 4698 | { |
| 4699 | arg = Fprefix_numeric_value (arg); |
| 4700 | CHECK_NUMBER (arg); |
| 4701 | } |
| 4702 | |
| 4703 | set_buffer_internal (buf); |
| 4704 | |
| 4705 | /* Handle centering on a graphical frame specially. Such frames can |
| 4706 | have variable-height lines and centering point on the basis of |
| 4707 | line counts would lead to strange effects. */ |
| 4708 | if (FRAME_WINDOW_P (XFRAME (w->frame))) |
| 4709 | { |
| 4710 | if (center_p) |
| 4711 | { |
| 4712 | struct it it; |
| 4713 | struct text_pos pt; |
| 4714 | |
| 4715 | SET_TEXT_POS (pt, PT, PT_BYTE); |
| 4716 | start_display (&it, w, pt); |
| 4717 | move_it_vertically (&it, - window_box_height (w) / 2); |
| 4718 | charpos = IT_CHARPOS (it); |
| 4719 | bytepos = IT_BYTEPOS (it); |
| 4720 | } |
| 4721 | else if (XINT (arg) < 0) |
| 4722 | { |
| 4723 | struct it it; |
| 4724 | struct text_pos pt; |
| 4725 | int y0, y1, h, nlines; |
| 4726 | |
| 4727 | SET_TEXT_POS (pt, PT, PT_BYTE); |
| 4728 | start_display (&it, w, pt); |
| 4729 | y0 = it.current_y; |
| 4730 | |
| 4731 | /* The amount of pixels we have to move back is the window |
| 4732 | height minus what's displayed in the line containing PT, |
| 4733 | and the lines below. */ |
| 4734 | nlines = - XINT (arg) - 1; |
| 4735 | move_it_by_lines (&it, nlines, 1); |
| 4736 | |
| 4737 | y1 = line_bottom_y (&it); |
| 4738 | |
| 4739 | /* If we can't move down NLINES lines because we hit |
| 4740 | the end of the buffer, count in some empty lines. */ |
| 4741 | if (it.vpos < nlines) |
| 4742 | y1 += (nlines - it.vpos) * CANON_Y_UNIT (it.f); |
| 4743 | |
| 4744 | h = window_box_height (w) - (y1 - y0); |
| 4745 | |
| 4746 | start_display (&it, w, pt); |
| 4747 | move_it_vertically (&it, - h); |
| 4748 | charpos = IT_CHARPOS (it); |
| 4749 | bytepos = IT_BYTEPOS (it); |
| 4750 | } |
| 4751 | else |
| 4752 | { |
| 4753 | struct position pos; |
| 4754 | pos = *vmotion (PT, - XINT (arg), w); |
| 4755 | charpos = pos.bufpos; |
| 4756 | bytepos = pos.bytepos; |
| 4757 | } |
| 4758 | } |
| 4759 | else |
| 4760 | { |
| 4761 | struct position pos; |
| 4762 | int ht = window_internal_height (w); |
| 4763 | |
| 4764 | if (center_p) |
| 4765 | arg = make_number (ht / 2); |
| 4766 | else if (XINT (arg) < 0) |
| 4767 | arg = make_number (XINT (arg) + ht); |
| 4768 | |
| 4769 | pos = *vmotion (PT, - XINT (arg), w); |
| 4770 | charpos = pos.bufpos; |
| 4771 | bytepos = pos.bytepos; |
| 4772 | } |
| 4773 | |
| 4774 | /* Set the new window start. */ |
| 4775 | set_marker_both (w->start, w->buffer, charpos, bytepos); |
| 4776 | w->window_end_valid = Qnil; |
| 4777 | w->force_start = Qt; |
| 4778 | if (bytepos == BEGV_BYTE || FETCH_BYTE (bytepos - 1) == '\n') |
| 4779 | w->start_at_line_beg = Qt; |
| 4780 | else |
| 4781 | w->start_at_line_beg = Qnil; |
| 4782 | |
| 4783 | set_buffer_internal (obuf); |
| 4784 | return Qnil; |
| 4785 | } |
| 4786 | |
| 4787 | |
| 4788 | DEFUN ("window-text-height", Fwindow_text_height, Swindow_text_height, |
| 4789 | 0, 1, 0, |
| 4790 | doc: /* Return the height in lines of the text display area of WINDOW. |
| 4791 | This doesn't include the mode-line (or header-line if any) or any |
| 4792 | partial-height lines in the text display area. */) |
| 4793 | (window) |
| 4794 | Lisp_Object window; |
| 4795 | { |
| 4796 | struct window *w = decode_window (window); |
| 4797 | int pixel_height = window_box_height (w); |
| 4798 | int line_height = pixel_height / CANON_Y_UNIT (XFRAME (w->frame)); |
| 4799 | return make_number (line_height); |
| 4800 | } |
| 4801 | |
| 4802 | |
| 4803 | \f |
| 4804 | DEFUN ("move-to-window-line", Fmove_to_window_line, Smove_to_window_line, |
| 4805 | 1, 1, "P", |
| 4806 | doc: /* Position point relative to window. |
| 4807 | With no argument, position point at center of window. |
| 4808 | An argument specifies vertical position within the window; |
| 4809 | zero means top of window, negative means relative to bottom of window. */) |
| 4810 | (arg) |
| 4811 | Lisp_Object arg; |
| 4812 | { |
| 4813 | struct window *w = XWINDOW (selected_window); |
| 4814 | int lines, start; |
| 4815 | Lisp_Object window; |
| 4816 | |
| 4817 | window = selected_window; |
| 4818 | start = marker_position (w->start); |
| 4819 | if (start < BEGV || start > ZV) |
| 4820 | { |
| 4821 | int height = window_internal_height (w); |
| 4822 | Fvertical_motion (make_number (- (height / 2)), window); |
| 4823 | set_marker_both (w->start, w->buffer, PT, PT_BYTE); |
| 4824 | w->start_at_line_beg = Fbolp (); |
| 4825 | w->force_start = Qt; |
| 4826 | } |
| 4827 | else |
| 4828 | Fgoto_char (w->start); |
| 4829 | |
| 4830 | lines = displayed_window_lines (w); |
| 4831 | if (NILP (arg)) |
| 4832 | XSETFASTINT (arg, lines / 2); |
| 4833 | else |
| 4834 | { |
| 4835 | arg = Fprefix_numeric_value (arg); |
| 4836 | if (XINT (arg) < 0) |
| 4837 | XSETINT (arg, XINT (arg) + lines); |
| 4838 | } |
| 4839 | |
| 4840 | /* Skip past a partially visible first line. */ |
| 4841 | if (w->vscroll) |
| 4842 | XSETINT (arg, XINT (arg) + 1); |
| 4843 | |
| 4844 | return Fvertical_motion (arg, window); |
| 4845 | } |
| 4846 | |
| 4847 | |
| 4848 | \f |
| 4849 | /*********************************************************************** |
| 4850 | Window Configuration |
| 4851 | ***********************************************************************/ |
| 4852 | |
| 4853 | struct save_window_data |
| 4854 | { |
| 4855 | EMACS_INT size_from_Lisp_Vector_struct; |
| 4856 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
| 4857 | Lisp_Object frame_width, frame_height, frame_menu_bar_lines; |
| 4858 | Lisp_Object frame_tool_bar_lines; |
| 4859 | Lisp_Object selected_frame; |
| 4860 | Lisp_Object current_window; |
| 4861 | Lisp_Object current_buffer; |
| 4862 | Lisp_Object minibuf_scroll_window; |
| 4863 | Lisp_Object minibuf_selected_window; |
| 4864 | Lisp_Object root_window; |
| 4865 | Lisp_Object focus_frame; |
| 4866 | /* Record the values of window-min-width and window-min-height |
| 4867 | so that window sizes remain consistent with them. */ |
| 4868 | Lisp_Object min_width, min_height; |
| 4869 | /* A vector, each of whose elements is a struct saved_window |
| 4870 | for one window. */ |
| 4871 | Lisp_Object saved_windows; |
| 4872 | }; |
| 4873 | |
| 4874 | /* This is saved as a Lisp_Vector */ |
| 4875 | struct saved_window |
| 4876 | { |
| 4877 | /* these first two must agree with struct Lisp_Vector in lisp.h */ |
| 4878 | EMACS_INT size_from_Lisp_Vector_struct; |
| 4879 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
| 4880 | |
| 4881 | Lisp_Object window; |
| 4882 | Lisp_Object buffer, start, pointm, mark; |
| 4883 | Lisp_Object left, top, width, height, hscroll, min_hscroll; |
| 4884 | Lisp_Object parent, prev; |
| 4885 | Lisp_Object start_at_line_beg; |
| 4886 | Lisp_Object display_table; |
| 4887 | Lisp_Object orig_top, orig_height; |
| 4888 | }; |
| 4889 | |
| 4890 | #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */ |
| 4891 | |
| 4892 | #define SAVED_WINDOW_N(swv,n) \ |
| 4893 | ((struct saved_window *) (XVECTOR ((swv)->contents[(n)]))) |
| 4894 | |
| 4895 | DEFUN ("window-configuration-p", Fwindow_configuration_p, Swindow_configuration_p, 1, 1, 0, |
| 4896 | doc: /* Return t if OBJECT is a window-configuration object. */) |
| 4897 | (object) |
| 4898 | Lisp_Object object; |
| 4899 | { |
| 4900 | if (WINDOW_CONFIGURATIONP (object)) |
| 4901 | return Qt; |
| 4902 | return Qnil; |
| 4903 | } |
| 4904 | |
| 4905 | DEFUN ("window-configuration-frame", Fwindow_configuration_frame, Swindow_configuration_frame, 1, 1, 0, |
| 4906 | doc: /* Return the frame that CONFIG, a window-configuration object, is about. */) |
| 4907 | (config) |
| 4908 | Lisp_Object config; |
| 4909 | { |
| 4910 | register struct save_window_data *data; |
| 4911 | struct Lisp_Vector *saved_windows; |
| 4912 | |
| 4913 | if (! WINDOW_CONFIGURATIONP (config)) |
| 4914 | wrong_type_argument (Qwindow_configuration_p, config); |
| 4915 | |
| 4916 | data = (struct save_window_data *) XVECTOR (config); |
| 4917 | saved_windows = XVECTOR (data->saved_windows); |
| 4918 | return XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 4919 | } |
| 4920 | |
| 4921 | DEFUN ("set-window-configuration", Fset_window_configuration, |
| 4922 | Sset_window_configuration, 1, 1, 0, |
| 4923 | doc: /* Set the configuration of windows and buffers as specified by CONFIGURATION. |
| 4924 | CONFIGURATION must be a value previously returned |
| 4925 | by `current-window-configuration' (which see). |
| 4926 | If CONFIGURATION was made from a frame that is now deleted, |
| 4927 | only frame-independent values can be restored. In this case, |
| 4928 | the return value is nil. Otherwise the value is t. */) |
| 4929 | (configuration) |
| 4930 | Lisp_Object configuration; |
| 4931 | { |
| 4932 | register struct save_window_data *data; |
| 4933 | struct Lisp_Vector *saved_windows; |
| 4934 | Lisp_Object new_current_buffer; |
| 4935 | Lisp_Object frame; |
| 4936 | FRAME_PTR f; |
| 4937 | int old_point = -1; |
| 4938 | |
| 4939 | while (!WINDOW_CONFIGURATIONP (configuration)) |
| 4940 | wrong_type_argument (Qwindow_configuration_p, configuration); |
| 4941 | |
| 4942 | data = (struct save_window_data *) XVECTOR (configuration); |
| 4943 | saved_windows = XVECTOR (data->saved_windows); |
| 4944 | |
| 4945 | new_current_buffer = data->current_buffer; |
| 4946 | if (NILP (XBUFFER (new_current_buffer)->name)) |
| 4947 | new_current_buffer = Qnil; |
| 4948 | else |
| 4949 | { |
| 4950 | if (XBUFFER (new_current_buffer) == current_buffer) |
| 4951 | old_point = PT; |
| 4952 | } |
| 4953 | |
| 4954 | frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 4955 | f = XFRAME (frame); |
| 4956 | |
| 4957 | /* If f is a dead frame, don't bother rebuilding its window tree. |
| 4958 | However, there is other stuff we should still try to do below. */ |
| 4959 | if (FRAME_LIVE_P (f)) |
| 4960 | { |
| 4961 | register struct window *w; |
| 4962 | register struct saved_window *p; |
| 4963 | struct window *root_window; |
| 4964 | struct window **leaf_windows; |
| 4965 | int n_leaf_windows; |
| 4966 | int k, i, n; |
| 4967 | |
| 4968 | /* If the frame has been resized since this window configuration was |
| 4969 | made, we change the frame to the size specified in the |
| 4970 | configuration, restore the configuration, and then resize it |
| 4971 | back. We keep track of the prevailing height in these variables. */ |
| 4972 | int previous_frame_height = FRAME_HEIGHT (f); |
| 4973 | int previous_frame_width = FRAME_WIDTH (f); |
| 4974 | int previous_frame_menu_bar_lines = FRAME_MENU_BAR_LINES (f); |
| 4975 | int previous_frame_tool_bar_lines = FRAME_TOOL_BAR_LINES (f); |
| 4976 | |
| 4977 | /* The mouse highlighting code could get screwed up |
| 4978 | if it runs during this. */ |
| 4979 | BLOCK_INPUT; |
| 4980 | |
| 4981 | if (XFASTINT (data->frame_height) != previous_frame_height |
| 4982 | || XFASTINT (data->frame_width) != previous_frame_width) |
| 4983 | change_frame_size (f, XFASTINT (data->frame_height), |
| 4984 | XFASTINT (data->frame_width), 0, 0, 0); |
| 4985 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 4986 | if (XFASTINT (data->frame_menu_bar_lines) |
| 4987 | != previous_frame_menu_bar_lines) |
| 4988 | x_set_menu_bar_lines (f, data->frame_menu_bar_lines, make_number (0)); |
| 4989 | #ifdef HAVE_WINDOW_SYSTEM |
| 4990 | if (XFASTINT (data->frame_tool_bar_lines) |
| 4991 | != previous_frame_tool_bar_lines) |
| 4992 | x_set_tool_bar_lines (f, data->frame_tool_bar_lines, make_number (0)); |
| 4993 | #endif |
| 4994 | #endif |
| 4995 | |
| 4996 | /* "Swap out" point from the selected window |
| 4997 | into its buffer. We do this now, before |
| 4998 | restoring the window contents, and prevent it from |
| 4999 | being done later on when we select a new window. */ |
| 5000 | if (! NILP (XWINDOW (selected_window)->buffer)) |
| 5001 | { |
| 5002 | w = XWINDOW (selected_window); |
| 5003 | set_marker_both (w->pointm, |
| 5004 | w->buffer, |
| 5005 | BUF_PT (XBUFFER (w->buffer)), |
| 5006 | BUF_PT_BYTE (XBUFFER (w->buffer))); |
| 5007 | } |
| 5008 | |
| 5009 | windows_or_buffers_changed++; |
| 5010 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 5011 | |
| 5012 | /* Problem: Freeing all matrices and later allocating them again |
| 5013 | is a serious redisplay flickering problem. What we would |
| 5014 | really like to do is to free only those matrices not reused |
| 5015 | below. */ |
| 5016 | root_window = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 5017 | leaf_windows |
| 5018 | = (struct window **) alloca (count_windows (root_window) |
| 5019 | * sizeof (struct window *)); |
| 5020 | n_leaf_windows = get_leaf_windows (root_window, leaf_windows, 0); |
| 5021 | |
| 5022 | /* Temporarily avoid any problems with windows that are smaller |
| 5023 | than they are supposed to be. */ |
| 5024 | window_min_height = 1; |
| 5025 | window_min_width = 1; |
| 5026 | |
| 5027 | /* Kludge Alert! |
| 5028 | Mark all windows now on frame as "deleted". |
| 5029 | Restoring the new configuration "undeletes" any that are in it. |
| 5030 | |
| 5031 | Save their current buffers in their height fields, since we may |
| 5032 | need it later, if a buffer saved in the configuration is now |
| 5033 | dead. */ |
| 5034 | delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 5035 | |
| 5036 | for (k = 0; k < saved_windows->size; k++) |
| 5037 | { |
| 5038 | p = SAVED_WINDOW_N (saved_windows, k); |
| 5039 | w = XWINDOW (p->window); |
| 5040 | w->next = Qnil; |
| 5041 | |
| 5042 | if (!NILP (p->parent)) |
| 5043 | w->parent = SAVED_WINDOW_N (saved_windows, |
| 5044 | XFASTINT (p->parent))->window; |
| 5045 | else |
| 5046 | w->parent = Qnil; |
| 5047 | |
| 5048 | if (!NILP (p->prev)) |
| 5049 | { |
| 5050 | w->prev = SAVED_WINDOW_N (saved_windows, |
| 5051 | XFASTINT (p->prev))->window; |
| 5052 | XWINDOW (w->prev)->next = p->window; |
| 5053 | } |
| 5054 | else |
| 5055 | { |
| 5056 | w->prev = Qnil; |
| 5057 | if (!NILP (w->parent)) |
| 5058 | { |
| 5059 | if (EQ (p->width, XWINDOW (w->parent)->width)) |
| 5060 | { |
| 5061 | XWINDOW (w->parent)->vchild = p->window; |
| 5062 | XWINDOW (w->parent)->hchild = Qnil; |
| 5063 | } |
| 5064 | else |
| 5065 | { |
| 5066 | XWINDOW (w->parent)->hchild = p->window; |
| 5067 | XWINDOW (w->parent)->vchild = Qnil; |
| 5068 | } |
| 5069 | } |
| 5070 | } |
| 5071 | |
| 5072 | /* If we squirreled away the buffer in the window's height, |
| 5073 | restore it now. */ |
| 5074 | if (BUFFERP (w->height)) |
| 5075 | w->buffer = w->height; |
| 5076 | w->left = p->left; |
| 5077 | w->top = p->top; |
| 5078 | w->width = p->width; |
| 5079 | w->height = p->height; |
| 5080 | w->hscroll = p->hscroll; |
| 5081 | w->min_hscroll = p->min_hscroll; |
| 5082 | w->display_table = p->display_table; |
| 5083 | w->orig_top = p->orig_top; |
| 5084 | w->orig_height = p->orig_height; |
| 5085 | XSETFASTINT (w->last_modified, 0); |
| 5086 | XSETFASTINT (w->last_overlay_modified, 0); |
| 5087 | |
| 5088 | /* Reinstall the saved buffer and pointers into it. */ |
| 5089 | if (NILP (p->buffer)) |
| 5090 | w->buffer = p->buffer; |
| 5091 | else |
| 5092 | { |
| 5093 | if (!NILP (XBUFFER (p->buffer)->name)) |
| 5094 | /* If saved buffer is alive, install it. */ |
| 5095 | { |
| 5096 | w->buffer = p->buffer; |
| 5097 | w->start_at_line_beg = p->start_at_line_beg; |
| 5098 | set_marker_restricted (w->start, p->start, w->buffer); |
| 5099 | set_marker_restricted (w->pointm, p->pointm, w->buffer); |
| 5100 | Fset_marker (XBUFFER (w->buffer)->mark, |
| 5101 | p->mark, w->buffer); |
| 5102 | |
| 5103 | /* As documented in Fcurrent_window_configuration, don't |
| 5104 | save the location of point in the buffer which was current |
| 5105 | when the window configuration was recorded. */ |
| 5106 | if (!EQ (p->buffer, new_current_buffer) |
| 5107 | && XBUFFER (p->buffer) == current_buffer) |
| 5108 | Fgoto_char (w->pointm); |
| 5109 | } |
| 5110 | else if (NILP (w->buffer) || NILP (XBUFFER (w->buffer)->name)) |
| 5111 | /* Else unless window has a live buffer, get one. */ |
| 5112 | { |
| 5113 | w->buffer = Fcdr (Fcar (Vbuffer_alist)); |
| 5114 | /* This will set the markers to beginning of visible |
| 5115 | range. */ |
| 5116 | set_marker_restricted (w->start, make_number (0), w->buffer); |
| 5117 | set_marker_restricted (w->pointm, make_number (0),w->buffer); |
| 5118 | w->start_at_line_beg = Qt; |
| 5119 | } |
| 5120 | else |
| 5121 | /* Keeping window's old buffer; make sure the markers |
| 5122 | are real. */ |
| 5123 | { |
| 5124 | /* Set window markers at start of visible range. */ |
| 5125 | if (XMARKER (w->start)->buffer == 0) |
| 5126 | set_marker_restricted (w->start, make_number (0), |
| 5127 | w->buffer); |
| 5128 | if (XMARKER (w->pointm)->buffer == 0) |
| 5129 | set_marker_restricted_both (w->pointm, w->buffer, |
| 5130 | BUF_PT (XBUFFER (w->buffer)), |
| 5131 | BUF_PT_BYTE (XBUFFER (w->buffer))); |
| 5132 | w->start_at_line_beg = Qt; |
| 5133 | } |
| 5134 | } |
| 5135 | } |
| 5136 | |
| 5137 | FRAME_ROOT_WINDOW (f) = data->root_window; |
| 5138 | /* Prevent "swapping out point" in the old selected window |
| 5139 | using the buffer that has been restored into it. |
| 5140 | That swapping out has already been done, |
| 5141 | near the beginning of this function. */ |
| 5142 | selected_window = Qnil; |
| 5143 | Fselect_window (data->current_window); |
| 5144 | XBUFFER (XWINDOW (selected_window)->buffer)->last_selected_window |
| 5145 | = selected_window; |
| 5146 | |
| 5147 | if (NILP (data->focus_frame) |
| 5148 | || (FRAMEP (data->focus_frame) |
| 5149 | && FRAME_LIVE_P (XFRAME (data->focus_frame)))) |
| 5150 | Fredirect_frame_focus (frame, data->focus_frame); |
| 5151 | |
| 5152 | #if 0 /* I don't understand why this is needed, and it causes problems |
| 5153 | when the frame's old selected window has been deleted. */ |
| 5154 | if (f != selected_frame && FRAME_WINDOW_P (f)) |
| 5155 | do_switch_frame (WINDOW_FRAME (XWINDOW (data->root_window)), |
| 5156 | 0, 0); |
| 5157 | #endif |
| 5158 | |
| 5159 | /* Set the screen height to the value it had before this function. */ |
| 5160 | if (previous_frame_height != FRAME_HEIGHT (f) |
| 5161 | || previous_frame_width != FRAME_WIDTH (f)) |
| 5162 | change_frame_size (f, previous_frame_height, previous_frame_width, |
| 5163 | 0, 0, 0); |
| 5164 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 5165 | if (previous_frame_menu_bar_lines != FRAME_MENU_BAR_LINES (f)) |
| 5166 | x_set_menu_bar_lines (f, make_number (previous_frame_menu_bar_lines), |
| 5167 | make_number (0)); |
| 5168 | #ifdef HAVE_WINDOW_SYSTEM |
| 5169 | if (previous_frame_tool_bar_lines != FRAME_TOOL_BAR_LINES (f)) |
| 5170 | x_set_tool_bar_lines (f, make_number (previous_frame_tool_bar_lines), |
| 5171 | make_number (0)); |
| 5172 | #endif |
| 5173 | #endif |
| 5174 | |
| 5175 | /* Now, free glyph matrices in windows that were not reused. */ |
| 5176 | for (i = n = 0; i < n_leaf_windows; ++i) |
| 5177 | { |
| 5178 | if (NILP (leaf_windows[i]->buffer)) |
| 5179 | { |
| 5180 | /* Assert it's not reused as a combination. */ |
| 5181 | xassert (NILP (leaf_windows[i]->hchild) |
| 5182 | && NILP (leaf_windows[i]->vchild)); |
| 5183 | free_window_matrices (leaf_windows[i]); |
| 5184 | } |
| 5185 | else if (EQ (leaf_windows[i]->buffer, new_current_buffer)) |
| 5186 | ++n; |
| 5187 | } |
| 5188 | |
| 5189 | /* If more than one window shows the new and old current buffer, |
| 5190 | don't try to preserve point in that buffer. */ |
| 5191 | if (old_point > 0 && n > 1) |
| 5192 | old_point = -1; |
| 5193 | |
| 5194 | adjust_glyphs (f); |
| 5195 | |
| 5196 | UNBLOCK_INPUT; |
| 5197 | |
| 5198 | /* Fselect_window will have made f the selected frame, so we |
| 5199 | reselect the proper frame here. Fhandle_switch_frame will change the |
| 5200 | selected window too, but that doesn't make the call to |
| 5201 | Fselect_window above totally superfluous; it still sets f's |
| 5202 | selected window. */ |
| 5203 | if (FRAME_LIVE_P (XFRAME (data->selected_frame))) |
| 5204 | do_switch_frame (data->selected_frame, 0, 0); |
| 5205 | |
| 5206 | if (! NILP (Vwindow_configuration_change_hook) |
| 5207 | && ! NILP (Vrun_hooks)) |
| 5208 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 5209 | } |
| 5210 | |
| 5211 | if (!NILP (new_current_buffer)) |
| 5212 | { |
| 5213 | Fset_buffer (new_current_buffer); |
| 5214 | |
| 5215 | /* If the buffer that is current now is the same |
| 5216 | that was current before setting the window configuration, |
| 5217 | don't alter its PT. */ |
| 5218 | if (old_point >= 0) |
| 5219 | SET_PT (old_point); |
| 5220 | } |
| 5221 | |
| 5222 | /* Restore the minimum heights recorded in the configuration. */ |
| 5223 | window_min_height = XINT (data->min_height); |
| 5224 | window_min_width = XINT (data->min_width); |
| 5225 | |
| 5226 | Vminibuf_scroll_window = data->minibuf_scroll_window; |
| 5227 | minibuf_selected_window = data->minibuf_selected_window; |
| 5228 | |
| 5229 | return (FRAME_LIVE_P (f) ? Qt : Qnil); |
| 5230 | } |
| 5231 | |
| 5232 | /* Mark all windows now on frame as deleted |
| 5233 | by setting their buffers to nil. */ |
| 5234 | |
| 5235 | void |
| 5236 | delete_all_subwindows (w) |
| 5237 | register struct window *w; |
| 5238 | { |
| 5239 | if (!NILP (w->next)) |
| 5240 | delete_all_subwindows (XWINDOW (w->next)); |
| 5241 | if (!NILP (w->vchild)) |
| 5242 | delete_all_subwindows (XWINDOW (w->vchild)); |
| 5243 | if (!NILP (w->hchild)) |
| 5244 | delete_all_subwindows (XWINDOW (w->hchild)); |
| 5245 | |
| 5246 | w->height = w->buffer; /* See Fset_window_configuration for excuse. */ |
| 5247 | |
| 5248 | if (!NILP (w->buffer)) |
| 5249 | unshow_buffer (w); |
| 5250 | |
| 5251 | /* We set all three of these fields to nil, to make sure that we can |
| 5252 | distinguish this dead window from any live window. Live leaf |
| 5253 | windows will have buffer set, and combination windows will have |
| 5254 | vchild or hchild set. */ |
| 5255 | w->buffer = Qnil; |
| 5256 | w->vchild = Qnil; |
| 5257 | w->hchild = Qnil; |
| 5258 | |
| 5259 | Vwindow_list = Qnil; |
| 5260 | } |
| 5261 | \f |
| 5262 | static int |
| 5263 | count_windows (window) |
| 5264 | register struct window *window; |
| 5265 | { |
| 5266 | register int count = 1; |
| 5267 | if (!NILP (window->next)) |
| 5268 | count += count_windows (XWINDOW (window->next)); |
| 5269 | if (!NILP (window->vchild)) |
| 5270 | count += count_windows (XWINDOW (window->vchild)); |
| 5271 | if (!NILP (window->hchild)) |
| 5272 | count += count_windows (XWINDOW (window->hchild)); |
| 5273 | return count; |
| 5274 | } |
| 5275 | |
| 5276 | |
| 5277 | /* Fill vector FLAT with leaf windows under W, starting at index I. |
| 5278 | Value is last index + 1. */ |
| 5279 | |
| 5280 | static int |
| 5281 | get_leaf_windows (w, flat, i) |
| 5282 | struct window *w; |
| 5283 | struct window **flat; |
| 5284 | int i; |
| 5285 | { |
| 5286 | while (w) |
| 5287 | { |
| 5288 | if (!NILP (w->hchild)) |
| 5289 | i = get_leaf_windows (XWINDOW (w->hchild), flat, i); |
| 5290 | else if (!NILP (w->vchild)) |
| 5291 | i = get_leaf_windows (XWINDOW (w->vchild), flat, i); |
| 5292 | else |
| 5293 | flat[i++] = w; |
| 5294 | |
| 5295 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 5296 | } |
| 5297 | |
| 5298 | return i; |
| 5299 | } |
| 5300 | |
| 5301 | |
| 5302 | /* Return a pointer to the glyph W's physical cursor is on. Value is |
| 5303 | null if W's current matrix is invalid, so that no meaningfull glyph |
| 5304 | can be returned. */ |
| 5305 | |
| 5306 | struct glyph * |
| 5307 | get_phys_cursor_glyph (w) |
| 5308 | struct window *w; |
| 5309 | { |
| 5310 | struct glyph_row *row; |
| 5311 | struct glyph *glyph; |
| 5312 | |
| 5313 | if (w->phys_cursor.vpos >= 0 |
| 5314 | && w->phys_cursor.vpos < w->current_matrix->nrows |
| 5315 | && (row = MATRIX_ROW (w->current_matrix, w->phys_cursor.vpos), |
| 5316 | row->enabled_p) |
| 5317 | && row->used[TEXT_AREA] > w->phys_cursor.hpos) |
| 5318 | glyph = row->glyphs[TEXT_AREA] + w->phys_cursor.hpos; |
| 5319 | else |
| 5320 | glyph = NULL; |
| 5321 | |
| 5322 | return glyph; |
| 5323 | } |
| 5324 | |
| 5325 | |
| 5326 | static int |
| 5327 | save_window_save (window, vector, i) |
| 5328 | Lisp_Object window; |
| 5329 | struct Lisp_Vector *vector; |
| 5330 | int i; |
| 5331 | { |
| 5332 | register struct saved_window *p; |
| 5333 | register struct window *w; |
| 5334 | register Lisp_Object tem; |
| 5335 | |
| 5336 | for (;!NILP (window); window = w->next) |
| 5337 | { |
| 5338 | p = SAVED_WINDOW_N (vector, i); |
| 5339 | w = XWINDOW (window); |
| 5340 | |
| 5341 | XSETFASTINT (w->temslot, i++); |
| 5342 | p->window = window; |
| 5343 | p->buffer = w->buffer; |
| 5344 | p->left = w->left; |
| 5345 | p->top = w->top; |
| 5346 | p->width = w->width; |
| 5347 | p->height = w->height; |
| 5348 | p->hscroll = w->hscroll; |
| 5349 | p->min_hscroll = w->min_hscroll; |
| 5350 | p->display_table = w->display_table; |
| 5351 | p->orig_top = w->orig_top; |
| 5352 | p->orig_height = w->orig_height; |
| 5353 | if (!NILP (w->buffer)) |
| 5354 | { |
| 5355 | /* Save w's value of point in the window configuration. |
| 5356 | If w is the selected window, then get the value of point |
| 5357 | from the buffer; pointm is garbage in the selected window. */ |
| 5358 | if (EQ (window, selected_window)) |
| 5359 | { |
| 5360 | p->pointm = Fmake_marker (); |
| 5361 | set_marker_both (p->pointm, w->buffer, |
| 5362 | BUF_PT (XBUFFER (w->buffer)), |
| 5363 | BUF_PT_BYTE (XBUFFER (w->buffer))); |
| 5364 | } |
| 5365 | else |
| 5366 | p->pointm = Fcopy_marker (w->pointm, Qnil); |
| 5367 | |
| 5368 | p->start = Fcopy_marker (w->start, Qnil); |
| 5369 | p->start_at_line_beg = w->start_at_line_beg; |
| 5370 | |
| 5371 | tem = XBUFFER (w->buffer)->mark; |
| 5372 | p->mark = Fcopy_marker (tem, Qnil); |
| 5373 | } |
| 5374 | else |
| 5375 | { |
| 5376 | p->pointm = Qnil; |
| 5377 | p->start = Qnil; |
| 5378 | p->mark = Qnil; |
| 5379 | p->start_at_line_beg = Qnil; |
| 5380 | } |
| 5381 | |
| 5382 | if (NILP (w->parent)) |
| 5383 | p->parent = Qnil; |
| 5384 | else |
| 5385 | p->parent = XWINDOW (w->parent)->temslot; |
| 5386 | |
| 5387 | if (NILP (w->prev)) |
| 5388 | p->prev = Qnil; |
| 5389 | else |
| 5390 | p->prev = XWINDOW (w->prev)->temslot; |
| 5391 | |
| 5392 | if (!NILP (w->vchild)) |
| 5393 | i = save_window_save (w->vchild, vector, i); |
| 5394 | if (!NILP (w->hchild)) |
| 5395 | i = save_window_save (w->hchild, vector, i); |
| 5396 | } |
| 5397 | |
| 5398 | return i; |
| 5399 | } |
| 5400 | |
| 5401 | DEFUN ("current-window-configuration", Fcurrent_window_configuration, |
| 5402 | Scurrent_window_configuration, 0, 1, 0, |
| 5403 | doc: /* Return an object representing the current window configuration of FRAME. |
| 5404 | If FRAME is nil or omitted, use the selected frame. |
| 5405 | This describes the number of windows, their sizes and current buffers, |
| 5406 | and for each displayed buffer, where display starts, and the positions of |
| 5407 | point and mark. An exception is made for point in the current buffer: |
| 5408 | its value is -not- saved. |
| 5409 | This also records the currently selected frame, and FRAME's focus |
| 5410 | redirection (see `redirect-frame-focus'). */) |
| 5411 | (frame) |
| 5412 | Lisp_Object frame; |
| 5413 | { |
| 5414 | register Lisp_Object tem; |
| 5415 | register int n_windows; |
| 5416 | register struct save_window_data *data; |
| 5417 | register struct Lisp_Vector *vec; |
| 5418 | register int i; |
| 5419 | FRAME_PTR f; |
| 5420 | |
| 5421 | if (NILP (frame)) |
| 5422 | frame = selected_frame; |
| 5423 | CHECK_LIVE_FRAME (frame); |
| 5424 | f = XFRAME (frame); |
| 5425 | |
| 5426 | n_windows = count_windows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 5427 | vec = allocate_other_vector (VECSIZE (struct save_window_data)); |
| 5428 | data = (struct save_window_data *)vec; |
| 5429 | |
| 5430 | XSETFASTINT (data->frame_width, FRAME_WIDTH (f)); |
| 5431 | XSETFASTINT (data->frame_height, FRAME_HEIGHT (f)); |
| 5432 | XSETFASTINT (data->frame_menu_bar_lines, FRAME_MENU_BAR_LINES (f)); |
| 5433 | XSETFASTINT (data->frame_tool_bar_lines, FRAME_TOOL_BAR_LINES (f)); |
| 5434 | data->selected_frame = selected_frame; |
| 5435 | data->current_window = FRAME_SELECTED_WINDOW (f); |
| 5436 | XSETBUFFER (data->current_buffer, current_buffer); |
| 5437 | data->minibuf_scroll_window = minibuf_level > 0 ? Vminibuf_scroll_window : Qnil; |
| 5438 | data->minibuf_selected_window = minibuf_level > 0 ? minibuf_selected_window : Qnil; |
| 5439 | data->root_window = FRAME_ROOT_WINDOW (f); |
| 5440 | data->focus_frame = FRAME_FOCUS_FRAME (f); |
| 5441 | XSETINT (data->min_height, window_min_height); |
| 5442 | XSETINT (data->min_width, window_min_width); |
| 5443 | tem = Fmake_vector (make_number (n_windows), Qnil); |
| 5444 | data->saved_windows = tem; |
| 5445 | for (i = 0; i < n_windows; i++) |
| 5446 | XVECTOR (tem)->contents[i] |
| 5447 | = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE), Qnil); |
| 5448 | save_window_save (FRAME_ROOT_WINDOW (f), XVECTOR (tem), 0); |
| 5449 | XSETWINDOW_CONFIGURATION (tem, data); |
| 5450 | return (tem); |
| 5451 | } |
| 5452 | |
| 5453 | DEFUN ("save-window-excursion", Fsave_window_excursion, Ssave_window_excursion, |
| 5454 | 0, UNEVALLED, 0, |
| 5455 | doc: /* Execute body, preserving window sizes and contents. |
| 5456 | Restore which buffer appears in which window, where display starts, |
| 5457 | and the value of point and mark for each window. |
| 5458 | Also restore the choice of selected window. |
| 5459 | Also restore which buffer is current. |
| 5460 | Does not restore the value of point in current buffer. |
| 5461 | usage: (save-window-excursion BODY ...) */) |
| 5462 | (args) |
| 5463 | Lisp_Object args; |
| 5464 | { |
| 5465 | register Lisp_Object val; |
| 5466 | register int count = specpdl_ptr - specpdl; |
| 5467 | |
| 5468 | record_unwind_protect (Fset_window_configuration, |
| 5469 | Fcurrent_window_configuration (Qnil)); |
| 5470 | val = Fprogn (args); |
| 5471 | return unbind_to (count, val); |
| 5472 | } |
| 5473 | |
| 5474 | \f |
| 5475 | /*********************************************************************** |
| 5476 | Marginal Areas |
| 5477 | ***********************************************************************/ |
| 5478 | |
| 5479 | DEFUN ("set-window-margins", Fset_window_margins, Sset_window_margins, |
| 5480 | 2, 3, 0, |
| 5481 | doc: /* Set width of marginal areas of window WINDOW. |
| 5482 | If window is nil, set margins of the currently selected window. |
| 5483 | First parameter LEFT-WIDTH specifies the number of character |
| 5484 | cells to reserve for the left marginal area. Second parameter |
| 5485 | RIGHT-WIDTH does the same for the right marginal area. |
| 5486 | A nil width parameter means no margin. */) |
| 5487 | (window, left, right) |
| 5488 | Lisp_Object window, left, right; |
| 5489 | { |
| 5490 | struct window *w = decode_window (window); |
| 5491 | |
| 5492 | if (!NILP (left)) |
| 5493 | CHECK_NUMBER_OR_FLOAT (left); |
| 5494 | if (!NILP (right)) |
| 5495 | CHECK_NUMBER_OR_FLOAT (right); |
| 5496 | |
| 5497 | /* Check widths < 0 and translate a zero width to nil. |
| 5498 | Margins that are too wide have to be checked elsewhere. */ |
| 5499 | if ((INTEGERP (left) && XINT (left) < 0) |
| 5500 | || (FLOATP (left) && XFLOAT_DATA (left) <= 0)) |
| 5501 | XSETFASTINT (left, 0); |
| 5502 | if (INTEGERP (left) && XFASTINT (left) == 0) |
| 5503 | left = Qnil; |
| 5504 | |
| 5505 | if ((INTEGERP (right) && XINT (right) < 0) |
| 5506 | || (FLOATP (right) && XFLOAT_DATA (right) <= 0)) |
| 5507 | XSETFASTINT (right, 0); |
| 5508 | if (INTEGERP (right) && XFASTINT (right) == 0) |
| 5509 | right = Qnil; |
| 5510 | |
| 5511 | w->left_margin_width = left; |
| 5512 | w->right_margin_width = right; |
| 5513 | |
| 5514 | ++windows_or_buffers_changed; |
| 5515 | adjust_glyphs (XFRAME (WINDOW_FRAME (w))); |
| 5516 | return Qnil; |
| 5517 | } |
| 5518 | |
| 5519 | |
| 5520 | DEFUN ("window-margins", Fwindow_margins, Swindow_margins, |
| 5521 | 0, 1, 0, |
| 5522 | doc: /* Get width of marginal areas of window WINDOW. |
| 5523 | If WINDOW is omitted or nil, use the currently selected window. |
| 5524 | Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH). |
| 5525 | If a marginal area does not exist, its width will be returned |
| 5526 | as nil. */) |
| 5527 | (window) |
| 5528 | Lisp_Object window; |
| 5529 | { |
| 5530 | struct window *w = decode_window (window); |
| 5531 | return Fcons (w->left_margin_width, w->right_margin_width); |
| 5532 | } |
| 5533 | |
| 5534 | |
| 5535 | \f |
| 5536 | /*********************************************************************** |
| 5537 | Smooth scrolling |
| 5538 | ***********************************************************************/ |
| 5539 | |
| 5540 | DEFUN ("window-vscroll", Fwindow_vscroll, Swindow_vscroll, 0, 1, 0, |
| 5541 | doc: /* Return the amount by which WINDOW is scrolled vertically. |
| 5542 | Use the selected window if WINDOW is nil or omitted. |
| 5543 | Value is a multiple of the canonical character height of WINDOW. */) |
| 5544 | (window) |
| 5545 | Lisp_Object window; |
| 5546 | { |
| 5547 | Lisp_Object result; |
| 5548 | struct frame *f; |
| 5549 | struct window *w; |
| 5550 | |
| 5551 | if (NILP (window)) |
| 5552 | window = selected_window; |
| 5553 | else |
| 5554 | CHECK_WINDOW (window); |
| 5555 | w = XWINDOW (window); |
| 5556 | f = XFRAME (w->frame); |
| 5557 | |
| 5558 | if (FRAME_WINDOW_P (f)) |
| 5559 | result = CANON_Y_FROM_PIXEL_Y (f, -w->vscroll); |
| 5560 | else |
| 5561 | result = make_number (0); |
| 5562 | return result; |
| 5563 | } |
| 5564 | |
| 5565 | |
| 5566 | DEFUN ("set-window-vscroll", Fset_window_vscroll, Sset_window_vscroll, |
| 5567 | 2, 2, 0, |
| 5568 | doc: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL. |
| 5569 | WINDOW nil means use the selected window. VSCROLL is a non-negative |
| 5570 | multiple of the canonical character height of WINDOW. */) |
| 5571 | (window, vscroll) |
| 5572 | Lisp_Object window, vscroll; |
| 5573 | { |
| 5574 | struct window *w; |
| 5575 | struct frame *f; |
| 5576 | |
| 5577 | if (NILP (window)) |
| 5578 | window = selected_window; |
| 5579 | else |
| 5580 | CHECK_WINDOW (window); |
| 5581 | CHECK_NUMBER_OR_FLOAT (vscroll); |
| 5582 | |
| 5583 | w = XWINDOW (window); |
| 5584 | f = XFRAME (w->frame); |
| 5585 | |
| 5586 | if (FRAME_WINDOW_P (f)) |
| 5587 | { |
| 5588 | int old_dy = w->vscroll; |
| 5589 | |
| 5590 | w->vscroll = - CANON_Y_UNIT (f) * XFLOATINT (vscroll); |
| 5591 | w->vscroll = min (w->vscroll, 0); |
| 5592 | |
| 5593 | /* Adjust glyph matrix of the frame if the virtual display |
| 5594 | area becomes larger than before. */ |
| 5595 | if (w->vscroll < 0 && w->vscroll < old_dy) |
| 5596 | adjust_glyphs (f); |
| 5597 | |
| 5598 | /* Prevent redisplay shortcuts. */ |
| 5599 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 5600 | } |
| 5601 | |
| 5602 | return Fwindow_vscroll (window); |
| 5603 | } |
| 5604 | |
| 5605 | \f |
| 5606 | /* Call FN for all leaf windows on frame F. FN is called with the |
| 5607 | first argument being a pointer to the leaf window, and with |
| 5608 | additional argument USER_DATA. Stops when FN returns 0. */ |
| 5609 | |
| 5610 | void |
| 5611 | foreach_window (f, fn, user_data) |
| 5612 | struct frame *f; |
| 5613 | int (* fn) P_ ((struct window *, void *)); |
| 5614 | void *user_data; |
| 5615 | { |
| 5616 | foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f)), fn, user_data); |
| 5617 | } |
| 5618 | |
| 5619 | |
| 5620 | /* Helper function for foreach_window. Call FN for all leaf windows |
| 5621 | reachable from W. FN is called with the first argument being a |
| 5622 | pointer to the leaf window, and with additional argument USER_DATA. |
| 5623 | Stop when FN returns 0. Value is 0 if stopped by FN. */ |
| 5624 | |
| 5625 | static int |
| 5626 | foreach_window_1 (w, fn, user_data) |
| 5627 | struct window *w; |
| 5628 | int (* fn) P_ ((struct window *, void *)); |
| 5629 | void *user_data; |
| 5630 | { |
| 5631 | int cont; |
| 5632 | |
| 5633 | for (cont = 1; w && cont;) |
| 5634 | { |
| 5635 | if (!NILP (w->hchild)) |
| 5636 | cont = foreach_window_1 (XWINDOW (w->hchild), fn, user_data); |
| 5637 | else if (!NILP (w->vchild)) |
| 5638 | cont = foreach_window_1 (XWINDOW (w->vchild), fn, user_data); |
| 5639 | else |
| 5640 | cont = fn (w, user_data); |
| 5641 | |
| 5642 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 5643 | } |
| 5644 | |
| 5645 | return cont; |
| 5646 | } |
| 5647 | |
| 5648 | |
| 5649 | /* Freeze or unfreeze the window start of W unless it is a |
| 5650 | mini-window or the selected window. FREEZE_P non-null means freeze |
| 5651 | the window start. */ |
| 5652 | |
| 5653 | static int |
| 5654 | freeze_window_start (w, freeze_p) |
| 5655 | struct window *w; |
| 5656 | void *freeze_p; |
| 5657 | { |
| 5658 | if (w == XWINDOW (selected_window) |
| 5659 | || MINI_WINDOW_P (w) |
| 5660 | || (MINI_WINDOW_P (XWINDOW (selected_window)) |
| 5661 | && ! NILP (Vminibuf_scroll_window) |
| 5662 | && w == XWINDOW (Vminibuf_scroll_window))) |
| 5663 | freeze_p = NULL; |
| 5664 | |
| 5665 | w->frozen_window_start_p = freeze_p != NULL; |
| 5666 | return 1; |
| 5667 | } |
| 5668 | |
| 5669 | |
| 5670 | /* Freeze or unfreeze the window starts of all leaf windows on frame |
| 5671 | F, except the selected window and a mini-window. FREEZE_P non-zero |
| 5672 | means freeze the window start. */ |
| 5673 | |
| 5674 | void |
| 5675 | freeze_window_starts (f, freeze_p) |
| 5676 | struct frame *f; |
| 5677 | int freeze_p; |
| 5678 | { |
| 5679 | foreach_window (f, freeze_window_start, (void *) (freeze_p ? f : 0)); |
| 5680 | } |
| 5681 | |
| 5682 | \f |
| 5683 | /*********************************************************************** |
| 5684 | Initialization |
| 5685 | ***********************************************************************/ |
| 5686 | |
| 5687 | /* Return 1 if window configurations C1 and C2 |
| 5688 | describe the same state of affairs. This is used by Fequal. */ |
| 5689 | |
| 5690 | int |
| 5691 | compare_window_configurations (c1, c2, ignore_positions) |
| 5692 | Lisp_Object c1, c2; |
| 5693 | int ignore_positions; |
| 5694 | { |
| 5695 | register struct save_window_data *d1, *d2; |
| 5696 | struct Lisp_Vector *sw1, *sw2; |
| 5697 | int i; |
| 5698 | |
| 5699 | if (!WINDOW_CONFIGURATIONP (c1)) |
| 5700 | wrong_type_argument (Qwindow_configuration_p, c1); |
| 5701 | if (!WINDOW_CONFIGURATIONP (c2)) |
| 5702 | wrong_type_argument (Qwindow_configuration_p, c2); |
| 5703 | |
| 5704 | d1 = (struct save_window_data *) XVECTOR (c1); |
| 5705 | d2 = (struct save_window_data *) XVECTOR (c2); |
| 5706 | sw1 = XVECTOR (d1->saved_windows); |
| 5707 | sw2 = XVECTOR (d2->saved_windows); |
| 5708 | |
| 5709 | if (! EQ (d1->frame_width, d2->frame_width)) |
| 5710 | return 0; |
| 5711 | if (! EQ (d1->frame_height, d2->frame_height)) |
| 5712 | return 0; |
| 5713 | if (! EQ (d1->frame_menu_bar_lines, d2->frame_menu_bar_lines)) |
| 5714 | return 0; |
| 5715 | if (! EQ (d1->selected_frame, d2->selected_frame)) |
| 5716 | return 0; |
| 5717 | /* Don't compare the current_window field directly. |
| 5718 | Instead see w1_is_current and w2_is_current, below. */ |
| 5719 | if (! EQ (d1->current_buffer, d2->current_buffer)) |
| 5720 | return 0; |
| 5721 | if (! ignore_positions) |
| 5722 | { |
| 5723 | if (! EQ (d1->minibuf_scroll_window, d2->minibuf_scroll_window)) |
| 5724 | return 0; |
| 5725 | if (! EQ (d1->minibuf_selected_window, d2->minibuf_selected_window)) |
| 5726 | return 0; |
| 5727 | } |
| 5728 | /* Don't compare the root_window field. |
| 5729 | We don't require the two configurations |
| 5730 | to use the same window object, |
| 5731 | and the two root windows must be equivalent |
| 5732 | if everything else compares equal. */ |
| 5733 | if (! EQ (d1->focus_frame, d2->focus_frame)) |
| 5734 | return 0; |
| 5735 | if (! EQ (d1->min_width, d2->min_width)) |
| 5736 | return 0; |
| 5737 | if (! EQ (d1->min_height, d2->min_height)) |
| 5738 | return 0; |
| 5739 | |
| 5740 | /* Verify that the two confis have the same number of windows. */ |
| 5741 | if (sw1->size != sw2->size) |
| 5742 | return 0; |
| 5743 | |
| 5744 | for (i = 0; i < sw1->size; i++) |
| 5745 | { |
| 5746 | struct saved_window *p1, *p2; |
| 5747 | int w1_is_current, w2_is_current; |
| 5748 | |
| 5749 | p1 = SAVED_WINDOW_N (sw1, i); |
| 5750 | p2 = SAVED_WINDOW_N (sw2, i); |
| 5751 | |
| 5752 | /* Verify that the current windows in the two |
| 5753 | configurations correspond to each other. */ |
| 5754 | w1_is_current = EQ (d1->current_window, p1->window); |
| 5755 | w2_is_current = EQ (d2->current_window, p2->window); |
| 5756 | |
| 5757 | if (w1_is_current != w2_is_current) |
| 5758 | return 0; |
| 5759 | |
| 5760 | /* Verify that the corresponding windows do match. */ |
| 5761 | if (! EQ (p1->buffer, p2->buffer)) |
| 5762 | return 0; |
| 5763 | if (! EQ (p1->left, p2->left)) |
| 5764 | return 0; |
| 5765 | if (! EQ (p1->top, p2->top)) |
| 5766 | return 0; |
| 5767 | if (! EQ (p1->width, p2->width)) |
| 5768 | return 0; |
| 5769 | if (! EQ (p1->height, p2->height)) |
| 5770 | return 0; |
| 5771 | if (! EQ (p1->display_table, p2->display_table)) |
| 5772 | return 0; |
| 5773 | if (! EQ (p1->parent, p2->parent)) |
| 5774 | return 0; |
| 5775 | if (! EQ (p1->prev, p2->prev)) |
| 5776 | return 0; |
| 5777 | if (! ignore_positions) |
| 5778 | { |
| 5779 | if (! EQ (p1->hscroll, p2->hscroll)) |
| 5780 | return 0; |
| 5781 | if (!EQ (p1->min_hscroll, p2->min_hscroll)) |
| 5782 | return 0; |
| 5783 | if (! EQ (p1->start_at_line_beg, p2->start_at_line_beg)) |
| 5784 | return 0; |
| 5785 | if (NILP (Fequal (p1->start, p2->start))) |
| 5786 | return 0; |
| 5787 | if (NILP (Fequal (p1->pointm, p2->pointm))) |
| 5788 | return 0; |
| 5789 | if (NILP (Fequal (p1->mark, p2->mark))) |
| 5790 | return 0; |
| 5791 | } |
| 5792 | } |
| 5793 | |
| 5794 | return 1; |
| 5795 | } |
| 5796 | |
| 5797 | DEFUN ("compare-window-configurations", Fcompare_window_configurations, |
| 5798 | Scompare_window_configurations, 2, 2, 0, |
| 5799 | doc: /* Compare two window configurations as regards the structure of windows. |
| 5800 | This function ignores details such as the values of point and mark |
| 5801 | and scrolling positions. */) |
| 5802 | (x, y) |
| 5803 | Lisp_Object x, y; |
| 5804 | { |
| 5805 | if (compare_window_configurations (x, y, 1)) |
| 5806 | return Qt; |
| 5807 | return Qnil; |
| 5808 | } |
| 5809 | \f |
| 5810 | void |
| 5811 | init_window_once () |
| 5812 | { |
| 5813 | struct frame *f = make_terminal_frame (); |
| 5814 | XSETFRAME (selected_frame, f); |
| 5815 | Vterminal_frame = selected_frame; |
| 5816 | minibuf_window = f->minibuffer_window; |
| 5817 | selected_window = f->selected_window; |
| 5818 | last_nonminibuf_frame = f; |
| 5819 | |
| 5820 | window_initialized = 1; |
| 5821 | } |
| 5822 | |
| 5823 | void |
| 5824 | init_window () |
| 5825 | { |
| 5826 | Vwindow_list = Qnil; |
| 5827 | } |
| 5828 | |
| 5829 | void |
| 5830 | syms_of_window () |
| 5831 | { |
| 5832 | Qwindow_size_fixed = intern ("window-size-fixed"); |
| 5833 | staticpro (&Qwindow_size_fixed); |
| 5834 | |
| 5835 | staticpro (&Qwindow_configuration_change_hook); |
| 5836 | Qwindow_configuration_change_hook |
| 5837 | = intern ("window-configuration-change-hook"); |
| 5838 | |
| 5839 | Qwindowp = intern ("windowp"); |
| 5840 | staticpro (&Qwindowp); |
| 5841 | |
| 5842 | Qwindow_configuration_p = intern ("window-configuration-p"); |
| 5843 | staticpro (&Qwindow_configuration_p); |
| 5844 | |
| 5845 | Qwindow_live_p = intern ("window-live-p"); |
| 5846 | staticpro (&Qwindow_live_p); |
| 5847 | |
| 5848 | Qtemp_buffer_show_hook = intern ("temp-buffer-show-hook"); |
| 5849 | staticpro (&Qtemp_buffer_show_hook); |
| 5850 | |
| 5851 | staticpro (&Vwindow_list); |
| 5852 | |
| 5853 | minibuf_selected_window = Qnil; |
| 5854 | staticpro (&minibuf_selected_window); |
| 5855 | |
| 5856 | DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function, |
| 5857 | doc: /* Non-nil means call as function to display a help buffer. |
| 5858 | The function is called with one argument, the buffer to be displayed. |
| 5859 | Used by `with-output-to-temp-buffer'. |
| 5860 | If this function is used, then it must do the entire job of showing |
| 5861 | the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */); |
| 5862 | Vtemp_buffer_show_function = Qnil; |
| 5863 | |
| 5864 | DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function, |
| 5865 | doc: /* If non-nil, function to call to handle `display-buffer'. |
| 5866 | It will receive two args, the buffer and a flag which if non-nil means |
| 5867 | that the currently selected window is not acceptable. |
| 5868 | Commands such as `switch-to-buffer-other-window' and `find-file-other-window' |
| 5869 | work using this function. */); |
| 5870 | Vdisplay_buffer_function = Qnil; |
| 5871 | |
| 5872 | DEFVAR_LISP ("even-window-heights", &Veven_window_heights, |
| 5873 | doc: /* *If non-nil, `display-buffer' should even the window heights. |
| 5874 | If nil, `display-buffer' will leave the window configuration alone. */); |
| 5875 | Veven_window_heights = Qt; |
| 5876 | |
| 5877 | DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window, |
| 5878 | doc: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */); |
| 5879 | Vminibuf_scroll_window = Qnil; |
| 5880 | |
| 5881 | DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows, |
| 5882 | doc: /* Non-nil means to use `mode-line-inactive' face in non-selected windows. |
| 5883 | If the minibuffer is active, the `minibuffer-scroll-window' mode line |
| 5884 | is displayed in the `mode-line' face. */); |
| 5885 | mode_line_in_non_selected_windows = 1; |
| 5886 | |
| 5887 | DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer, |
| 5888 | doc: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */); |
| 5889 | Vother_window_scroll_buffer = Qnil; |
| 5890 | |
| 5891 | DEFVAR_BOOL ("pop-up-frames", &pop_up_frames, |
| 5892 | doc: /* *Non-nil means `display-buffer' should make a separate frame. */); |
| 5893 | pop_up_frames = 0; |
| 5894 | |
| 5895 | DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames, |
| 5896 | doc: /* *Non-nil means `display-buffer' should reuse frames. |
| 5897 | If the buffer in question is already displayed in a frame, raise that frame. */); |
| 5898 | display_buffer_reuse_frames = 0; |
| 5899 | |
| 5900 | DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function, |
| 5901 | doc: /* Function to call to handle automatic new frame creation. |
| 5902 | It is called with no arguments and should return a newly created frame. |
| 5903 | |
| 5904 | A typical value might be `(lambda () (new-frame pop-up-frame-alist))' |
| 5905 | where `pop-up-frame-alist' would hold the default frame parameters. */); |
| 5906 | Vpop_up_frame_function = Qnil; |
| 5907 | |
| 5908 | DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names, |
| 5909 | doc: /* *List of buffer names that should have their own special frames. |
| 5910 | Displaying a buffer whose name is in this list makes a special frame for it |
| 5911 | using `special-display-function'. See also `special-display-regexps'. |
| 5912 | |
| 5913 | An element of the list can be a list instead of just a string. |
| 5914 | There are two ways to use a list as an element: |
| 5915 | (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...) |
| 5916 | In the first case, FRAME-PARAMETERS are used to create the frame. |
| 5917 | In the latter case, FUNCTION is called with BUFFER as the first argument, |
| 5918 | followed by OTHER-ARGS--it can display BUFFER in any way it likes. |
| 5919 | All this is done by the function found in `special-display-function'. |
| 5920 | |
| 5921 | If this variable appears \"not to work\", because you add a name to it |
| 5922 | but that buffer still appears in the selected window, look at the |
| 5923 | values of `same-window-buffer-names' and `same-window-regexps'. |
| 5924 | Those variables take precedence over this one. */); |
| 5925 | Vspecial_display_buffer_names = Qnil; |
| 5926 | |
| 5927 | DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps, |
| 5928 | doc: /* *List of regexps saying which buffers should have their own special frames. |
| 5929 | If a buffer name matches one of these regexps, it gets its own frame. |
| 5930 | Displaying a buffer whose name is in this list makes a special frame for it |
| 5931 | using `special-display-function'. |
| 5932 | |
| 5933 | An element of the list can be a list instead of just a string. |
| 5934 | There are two ways to use a list as an element: |
| 5935 | (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...) |
| 5936 | In the first case, FRAME-PARAMETERS are used to create the frame. |
| 5937 | In the latter case, FUNCTION is called with the buffer as first argument, |
| 5938 | followed by OTHER-ARGS--it can display the buffer in any way it likes. |
| 5939 | All this is done by the function found in `special-display-function'. |
| 5940 | |
| 5941 | If this variable appears \"not to work\", because you add a regexp to it |
| 5942 | but the matching buffers still appear in the selected window, look at the |
| 5943 | values of `same-window-buffer-names' and `same-window-regexps'. |
| 5944 | Those variables take precedence over this one. */); |
| 5945 | Vspecial_display_regexps = Qnil; |
| 5946 | |
| 5947 | DEFVAR_LISP ("special-display-function", &Vspecial_display_function, |
| 5948 | doc: /* Function to call to make a new frame for a special buffer. |
| 5949 | It is called with two arguments, the buffer and optional buffer specific |
| 5950 | data, and should return a window displaying that buffer. |
| 5951 | The default value makes a separate frame for the buffer, |
| 5952 | using `special-display-frame-alist' to specify the frame parameters. |
| 5953 | |
| 5954 | A buffer is special if its is listed in `special-display-buffer-names' |
| 5955 | or matches a regexp in `special-display-regexps'. */); |
| 5956 | Vspecial_display_function = Qnil; |
| 5957 | |
| 5958 | DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names, |
| 5959 | doc: /* *List of buffer names that should appear in the selected window. |
| 5960 | Displaying one of these buffers using `display-buffer' or `pop-to-buffer' |
| 5961 | switches to it in the selected window, rather than making it appear |
| 5962 | in some other window. |
| 5963 | |
| 5964 | An element of the list can be a cons cell instead of just a string. |
| 5965 | Then the car must be a string, which specifies the buffer name. |
| 5966 | This is for compatibility with `special-display-buffer-names'; |
| 5967 | the cdr of the cons cell is ignored. |
| 5968 | |
| 5969 | See also `same-window-regexps'. */); |
| 5970 | Vsame_window_buffer_names = Qnil; |
| 5971 | |
| 5972 | DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps, |
| 5973 | doc: /* *List of regexps saying which buffers should appear in the selected window. |
| 5974 | If a buffer name matches one of these regexps, then displaying it |
| 5975 | using `display-buffer' or `pop-to-buffer' switches to it |
| 5976 | in the selected window, rather than making it appear in some other window. |
| 5977 | |
| 5978 | An element of the list can be a cons cell instead of just a string. |
| 5979 | Then the car must be a string, which specifies the buffer name. |
| 5980 | This is for compatibility with `special-display-buffer-names'; |
| 5981 | the cdr of the cons cell is ignored. |
| 5982 | |
| 5983 | See also `same-window-buffer-names'. */); |
| 5984 | Vsame_window_regexps = Qnil; |
| 5985 | |
| 5986 | DEFVAR_BOOL ("pop-up-windows", &pop_up_windows, |
| 5987 | doc: /* *Non-nil means display-buffer should make new windows. */); |
| 5988 | pop_up_windows = 1; |
| 5989 | |
| 5990 | DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines, |
| 5991 | doc: /* *Number of lines of continuity when scrolling by screenfuls. */); |
| 5992 | next_screen_context_lines = 2; |
| 5993 | |
| 5994 | DEFVAR_INT ("split-height-threshold", &split_height_threshold, |
| 5995 | doc: /* *display-buffer would prefer to split the largest window if this large. |
| 5996 | If there is only one window, it is split regardless of this value. */); |
| 5997 | split_height_threshold = 500; |
| 5998 | |
| 5999 | DEFVAR_INT ("window-min-height", &window_min_height, |
| 6000 | doc: /* *Delete any window less than this tall (including its mode line). */); |
| 6001 | window_min_height = 4; |
| 6002 | |
| 6003 | DEFVAR_INT ("window-min-width", &window_min_width, |
| 6004 | doc: /* *Delete any window less than this wide. */); |
| 6005 | window_min_width = 10; |
| 6006 | |
| 6007 | DEFVAR_LISP ("scroll-preserve-screen-position", |
| 6008 | &Vscroll_preserve_screen_position, |
| 6009 | doc: /* *Non-nil means scroll commands move point to keep its screen line unchanged. */); |
| 6010 | Vscroll_preserve_screen_position = Qnil; |
| 6011 | |
| 6012 | DEFVAR_LISP ("window-configuration-change-hook", |
| 6013 | &Vwindow_configuration_change_hook, |
| 6014 | doc: /* Functions to call when window configuration changes. |
| 6015 | The selected frame is the one whose configuration has changed. */); |
| 6016 | Vwindow_configuration_change_hook = Qnil; |
| 6017 | |
| 6018 | DEFVAR_BOOL ("window-size-fixed", &window_size_fixed, |
| 6019 | doc: /* Non-nil in a buffer means windows displaying the buffer are fixed-size. |
| 6020 | Emacs won't change the size of any window displaying that buffer, |
| 6021 | unless you explicitly change the size, or Emacs has no other choice. |
| 6022 | This variable automatically becomes buffer-local when set. */); |
| 6023 | Fmake_variable_buffer_local (Qwindow_size_fixed); |
| 6024 | window_size_fixed = 0; |
| 6025 | |
| 6026 | defsubr (&Sselected_window); |
| 6027 | defsubr (&Sminibuffer_window); |
| 6028 | defsubr (&Swindow_minibuffer_p); |
| 6029 | defsubr (&Swindowp); |
| 6030 | defsubr (&Swindow_live_p); |
| 6031 | defsubr (&Spos_visible_in_window_p); |
| 6032 | defsubr (&Swindow_buffer); |
| 6033 | defsubr (&Swindow_height); |
| 6034 | defsubr (&Swindow_width); |
| 6035 | defsubr (&Swindow_hscroll); |
| 6036 | defsubr (&Sset_window_hscroll); |
| 6037 | defsubr (&Swindow_redisplay_end_trigger); |
| 6038 | defsubr (&Sset_window_redisplay_end_trigger); |
| 6039 | defsubr (&Swindow_edges); |
| 6040 | defsubr (&Scoordinates_in_window_p); |
| 6041 | defsubr (&Swindow_at); |
| 6042 | defsubr (&Swindow_point); |
| 6043 | defsubr (&Swindow_start); |
| 6044 | defsubr (&Swindow_end); |
| 6045 | defsubr (&Sset_window_point); |
| 6046 | defsubr (&Sset_window_start); |
| 6047 | defsubr (&Swindow_dedicated_p); |
| 6048 | defsubr (&Sset_window_dedicated_p); |
| 6049 | defsubr (&Swindow_display_table); |
| 6050 | defsubr (&Sset_window_display_table); |
| 6051 | defsubr (&Snext_window); |
| 6052 | defsubr (&Sprevious_window); |
| 6053 | defsubr (&Sother_window); |
| 6054 | defsubr (&Sget_lru_window); |
| 6055 | defsubr (&Sget_largest_window); |
| 6056 | defsubr (&Sget_buffer_window); |
| 6057 | defsubr (&Sdelete_other_windows); |
| 6058 | defsubr (&Sdelete_windows_on); |
| 6059 | defsubr (&Sreplace_buffer_in_windows); |
| 6060 | defsubr (&Sdelete_window); |
| 6061 | defsubr (&Sset_window_buffer); |
| 6062 | defsubr (&Sselect_window); |
| 6063 | defsubr (&Sspecial_display_p); |
| 6064 | defsubr (&Ssame_window_p); |
| 6065 | defsubr (&Sdisplay_buffer); |
| 6066 | defsubr (&Ssplit_window); |
| 6067 | defsubr (&Senlarge_window); |
| 6068 | defsubr (&Sshrink_window); |
| 6069 | defsubr (&Sscroll_up); |
| 6070 | defsubr (&Sscroll_down); |
| 6071 | defsubr (&Sscroll_left); |
| 6072 | defsubr (&Sscroll_right); |
| 6073 | defsubr (&Sother_window_for_scrolling); |
| 6074 | defsubr (&Sscroll_other_window); |
| 6075 | defsubr (&Sminibuffer_selected_window); |
| 6076 | defsubr (&Srecenter); |
| 6077 | defsubr (&Swindow_text_height); |
| 6078 | defsubr (&Smove_to_window_line); |
| 6079 | defsubr (&Swindow_configuration_p); |
| 6080 | defsubr (&Swindow_configuration_frame); |
| 6081 | defsubr (&Sset_window_configuration); |
| 6082 | defsubr (&Scurrent_window_configuration); |
| 6083 | defsubr (&Ssave_window_excursion); |
| 6084 | defsubr (&Sset_window_margins); |
| 6085 | defsubr (&Swindow_margins); |
| 6086 | defsubr (&Swindow_vscroll); |
| 6087 | defsubr (&Sset_window_vscroll); |
| 6088 | defsubr (&Scompare_window_configurations); |
| 6089 | defsubr (&Swindow_list); |
| 6090 | } |
| 6091 | |
| 6092 | void |
| 6093 | keys_of_window () |
| 6094 | { |
| 6095 | initial_define_key (control_x_map, '1', "delete-other-windows"); |
| 6096 | initial_define_key (control_x_map, '2', "split-window"); |
| 6097 | initial_define_key (control_x_map, '0', "delete-window"); |
| 6098 | initial_define_key (control_x_map, 'o', "other-window"); |
| 6099 | initial_define_key (control_x_map, '^', "enlarge-window"); |
| 6100 | initial_define_key (control_x_map, '<', "scroll-left"); |
| 6101 | initial_define_key (control_x_map, '>', "scroll-right"); |
| 6102 | |
| 6103 | initial_define_key (global_map, Ctl ('V'), "scroll-up"); |
| 6104 | initial_define_key (meta_map, Ctl ('V'), "scroll-other-window"); |
| 6105 | initial_define_key (meta_map, 'v', "scroll-down"); |
| 6106 | |
| 6107 | initial_define_key (global_map, Ctl('L'), "recenter"); |
| 6108 | initial_define_key (meta_map, 'r', "move-to-window-line"); |
| 6109 | } |