| 1 | /* Window creation, deletion and examination for GNU Emacs. |
| 2 | Does not include redisplay. |
| 3 | Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1996, 1997, 1998, 2000, |
| 4 | 2001, 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor, |
| 21 | Boston, MA 02110-1301, 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 MAC_OS |
| 48 | #include "macterm.h" |
| 49 | #endif |
| 50 | |
| 51 | |
| 52 | Lisp_Object Qwindowp, Qwindow_live_p, Qwindow_configuration_p; |
| 53 | Lisp_Object Qwindow_size_fixed; |
| 54 | extern Lisp_Object Qleft_margin, Qright_margin; |
| 55 | |
| 56 | static int displayed_window_lines P_ ((struct window *)); |
| 57 | static struct window *decode_window P_ ((Lisp_Object)); |
| 58 | static int count_windows P_ ((struct window *)); |
| 59 | static int get_leaf_windows P_ ((struct window *, struct window **, int)); |
| 60 | static void window_scroll P_ ((Lisp_Object, int, int, int)); |
| 61 | static void window_scroll_pixel_based P_ ((Lisp_Object, int, int, int)); |
| 62 | static void window_scroll_line_based P_ ((Lisp_Object, int, int, int)); |
| 63 | static int window_min_size_1 P_ ((struct window *, int)); |
| 64 | static int window_min_size P_ ((struct window *, int, int, int *)); |
| 65 | static void size_window P_ ((Lisp_Object, int, int, int)); |
| 66 | static int freeze_window_start P_ ((struct window *, void *)); |
| 67 | static int window_fixed_size_p P_ ((struct window *, int, int)); |
| 68 | static void enlarge_window P_ ((Lisp_Object, int, int, int)); |
| 69 | static Lisp_Object window_list P_ ((void)); |
| 70 | static int add_window_to_list P_ ((struct window *, void *)); |
| 71 | static int candidate_window_p P_ ((Lisp_Object, Lisp_Object, Lisp_Object, |
| 72 | Lisp_Object)); |
| 73 | static Lisp_Object next_window P_ ((Lisp_Object, Lisp_Object, |
| 74 | Lisp_Object, int)); |
| 75 | static void decode_next_window_args P_ ((Lisp_Object *, Lisp_Object *, |
| 76 | Lisp_Object *)); |
| 77 | static int foreach_window_1 P_ ((struct window *, |
| 78 | int (* fn) (struct window *, void *), |
| 79 | void *)); |
| 80 | static Lisp_Object window_list_1 P_ ((Lisp_Object, Lisp_Object, Lisp_Object)); |
| 81 | |
| 82 | /* This is the window in which the terminal's cursor should |
| 83 | be left when nothing is being done with it. This must |
| 84 | always be a leaf window, and its buffer is selected by |
| 85 | the top level editing loop at the end of each command. |
| 86 | |
| 87 | This value is always the same as |
| 88 | FRAME_SELECTED_WINDOW (selected_frame). */ |
| 89 | |
| 90 | Lisp_Object selected_window; |
| 91 | |
| 92 | /* A list of all windows for use by next_window and Fwindow_list. |
| 93 | Functions creating or deleting windows should invalidate this cache |
| 94 | by setting it to nil. */ |
| 95 | |
| 96 | Lisp_Object Vwindow_list; |
| 97 | |
| 98 | /* The mini-buffer window of the selected frame. |
| 99 | Note that you cannot test for mini-bufferness of an arbitrary window |
| 100 | by comparing against this; but you can test for mini-bufferness of |
| 101 | the selected window. */ |
| 102 | |
| 103 | Lisp_Object minibuf_window; |
| 104 | |
| 105 | /* Non-nil means it is the window whose mode line should be |
| 106 | shown as the selected window when the minibuffer is selected. */ |
| 107 | |
| 108 | Lisp_Object minibuf_selected_window; |
| 109 | |
| 110 | /* Non-nil means it is the window for C-M-v to scroll |
| 111 | when the mini-buffer is selected. */ |
| 112 | |
| 113 | Lisp_Object Vminibuf_scroll_window; |
| 114 | |
| 115 | /* Non-nil means this is the buffer whose window C-M-v should scroll. */ |
| 116 | |
| 117 | Lisp_Object Vother_window_scroll_buffer; |
| 118 | |
| 119 | /* Non-nil means it's function to call to display temp buffers. */ |
| 120 | |
| 121 | Lisp_Object Vtemp_buffer_show_function; |
| 122 | |
| 123 | /* Non-zero means line and page scrolling on tall lines (with images) |
| 124 | does partial scrolling by modifying window-vscroll. */ |
| 125 | |
| 126 | int auto_window_vscroll_p; |
| 127 | |
| 128 | /* Non-zero means to use mode-line-inactive face in all windows but the |
| 129 | selected-window and the minibuffer-scroll-window when the |
| 130 | minibuffer is active. */ |
| 131 | int mode_line_in_non_selected_windows; |
| 132 | |
| 133 | /* If a window gets smaller than either of these, it is removed. */ |
| 134 | |
| 135 | EMACS_INT window_min_height; |
| 136 | EMACS_INT window_min_width; |
| 137 | |
| 138 | /* Nonzero implies Fdisplay_buffer should create windows. */ |
| 139 | |
| 140 | int pop_up_windows; |
| 141 | |
| 142 | /* Nonzero implies make new frames for Fdisplay_buffer. */ |
| 143 | |
| 144 | int pop_up_frames; |
| 145 | |
| 146 | /* Nonzero means reuse existing frames for displaying buffers. */ |
| 147 | |
| 148 | int display_buffer_reuse_frames; |
| 149 | |
| 150 | /* Non-nil means use this function instead of default */ |
| 151 | |
| 152 | Lisp_Object Vpop_up_frame_function; |
| 153 | |
| 154 | /* Function to call to handle Fdisplay_buffer. */ |
| 155 | |
| 156 | Lisp_Object Vdisplay_buffer_function; |
| 157 | |
| 158 | /* Non-nil means that Fdisplay_buffer should even the heights of windows. */ |
| 159 | |
| 160 | Lisp_Object Veven_window_heights; |
| 161 | |
| 162 | /* List of buffer *names* for buffers that should have their own frames. */ |
| 163 | |
| 164 | Lisp_Object Vspecial_display_buffer_names; |
| 165 | |
| 166 | /* List of regexps for buffer names that should have their own frames. */ |
| 167 | |
| 168 | Lisp_Object Vspecial_display_regexps; |
| 169 | |
| 170 | /* Function to pop up a special frame. */ |
| 171 | |
| 172 | Lisp_Object Vspecial_display_function; |
| 173 | |
| 174 | /* List of buffer *names* for buffers to appear in selected window. */ |
| 175 | |
| 176 | Lisp_Object Vsame_window_buffer_names; |
| 177 | |
| 178 | /* List of regexps for buffer names to appear in selected window. */ |
| 179 | |
| 180 | Lisp_Object Vsame_window_regexps; |
| 181 | |
| 182 | /* Hook run at end of temp_output_buffer_show. */ |
| 183 | |
| 184 | Lisp_Object Qtemp_buffer_show_hook; |
| 185 | |
| 186 | /* Fdisplay_buffer always splits the largest window |
| 187 | if that window is more than this high. */ |
| 188 | |
| 189 | EMACS_INT split_height_threshold; |
| 190 | |
| 191 | /* Number of lines of continuity in scrolling by screenfuls. */ |
| 192 | |
| 193 | EMACS_INT next_screen_context_lines; |
| 194 | |
| 195 | /* Incremented for each window created. */ |
| 196 | |
| 197 | static int sequence_number; |
| 198 | |
| 199 | /* Nonzero after init_window_once has finished. */ |
| 200 | |
| 201 | static int window_initialized; |
| 202 | |
| 203 | /* Hook to run when window config changes. */ |
| 204 | |
| 205 | Lisp_Object Qwindow_configuration_change_hook; |
| 206 | Lisp_Object Vwindow_configuration_change_hook; |
| 207 | |
| 208 | /* Non-nil means scroll commands try to put point |
| 209 | at the same screen height as previously. */ |
| 210 | |
| 211 | Lisp_Object Vscroll_preserve_screen_position; |
| 212 | |
| 213 | #if 0 /* This isn't used anywhere. */ |
| 214 | /* Nonzero means we can split a frame even if it is "unsplittable". */ |
| 215 | static int inhibit_frame_unsplittable; |
| 216 | #endif /* 0 */ |
| 217 | |
| 218 | extern EMACS_INT scroll_margin; |
| 219 | |
| 220 | extern Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
| 221 | \f |
| 222 | DEFUN ("windowp", Fwindowp, Swindowp, 1, 1, 0, |
| 223 | doc: /* Returns t if OBJECT is a window. */) |
| 224 | (object) |
| 225 | Lisp_Object object; |
| 226 | { |
| 227 | return WINDOWP (object) ? Qt : Qnil; |
| 228 | } |
| 229 | |
| 230 | DEFUN ("window-live-p", Fwindow_live_p, Swindow_live_p, 1, 1, 0, |
| 231 | doc: /* Returns t if OBJECT is a window which is currently visible. */) |
| 232 | (object) |
| 233 | Lisp_Object object; |
| 234 | { |
| 235 | return WINDOW_LIVE_P (object) ? Qt : Qnil; |
| 236 | } |
| 237 | |
| 238 | Lisp_Object |
| 239 | make_window () |
| 240 | { |
| 241 | Lisp_Object val; |
| 242 | register struct window *p; |
| 243 | |
| 244 | p = allocate_window (); |
| 245 | ++sequence_number; |
| 246 | XSETFASTINT (p->sequence_number, sequence_number); |
| 247 | XSETFASTINT (p->left_col, 0); |
| 248 | XSETFASTINT (p->top_line, 0); |
| 249 | XSETFASTINT (p->total_lines, 0); |
| 250 | XSETFASTINT (p->total_cols, 0); |
| 251 | XSETFASTINT (p->hscroll, 0); |
| 252 | XSETFASTINT (p->min_hscroll, 0); |
| 253 | p->orig_top_line = p->orig_total_lines = Qnil; |
| 254 | p->start = Fmake_marker (); |
| 255 | p->pointm = Fmake_marker (); |
| 256 | XSETFASTINT (p->use_time, 0); |
| 257 | p->frame = Qnil; |
| 258 | p->display_table = Qnil; |
| 259 | p->dedicated = Qnil; |
| 260 | p->pseudo_window_p = 0; |
| 261 | bzero (&p->cursor, sizeof (p->cursor)); |
| 262 | bzero (&p->last_cursor, sizeof (p->last_cursor)); |
| 263 | bzero (&p->phys_cursor, sizeof (p->phys_cursor)); |
| 264 | p->desired_matrix = p->current_matrix = 0; |
| 265 | p->nrows_scale_factor = p->ncols_scale_factor = 1; |
| 266 | p->phys_cursor_type = -1; |
| 267 | p->phys_cursor_width = -1; |
| 268 | p->must_be_updated_p = 0; |
| 269 | XSETFASTINT (p->window_end_vpos, 0); |
| 270 | XSETFASTINT (p->window_end_pos, 0); |
| 271 | p->window_end_valid = Qnil; |
| 272 | p->vscroll = 0; |
| 273 | XSETWINDOW (val, p); |
| 274 | XSETFASTINT (p->last_point, 0); |
| 275 | p->frozen_window_start_p = 0; |
| 276 | p->height_fixed_p = 0; |
| 277 | p->last_cursor_off_p = p->cursor_off_p = 0; |
| 278 | p->left_margin_cols = Qnil; |
| 279 | p->right_margin_cols = Qnil; |
| 280 | p->left_fringe_width = Qnil; |
| 281 | p->right_fringe_width = Qnil; |
| 282 | p->fringes_outside_margins = Qnil; |
| 283 | p->scroll_bar_width = Qnil; |
| 284 | p->vertical_scroll_bar_type = Qt; |
| 285 | |
| 286 | Vwindow_list = Qnil; |
| 287 | return val; |
| 288 | } |
| 289 | |
| 290 | DEFUN ("selected-window", Fselected_window, Sselected_window, 0, 0, 0, |
| 291 | doc: /* Return the window that the cursor now appears in and commands apply to. */) |
| 292 | () |
| 293 | { |
| 294 | return selected_window; |
| 295 | } |
| 296 | |
| 297 | DEFUN ("minibuffer-window", Fminibuffer_window, Sminibuffer_window, 0, 1, 0, |
| 298 | doc: /* Return the window used now for minibuffers. |
| 299 | If the optional argument FRAME is specified, return the minibuffer window |
| 300 | used by that frame. */) |
| 301 | (frame) |
| 302 | Lisp_Object frame; |
| 303 | { |
| 304 | if (NILP (frame)) |
| 305 | frame = selected_frame; |
| 306 | CHECK_LIVE_FRAME (frame); |
| 307 | return FRAME_MINIBUF_WINDOW (XFRAME (frame)); |
| 308 | } |
| 309 | |
| 310 | DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p, Swindow_minibuffer_p, 0, 1, 0, |
| 311 | doc: /* Returns non-nil if WINDOW is a minibuffer window. |
| 312 | WINDOW defaults to the selected window. */) |
| 313 | (window) |
| 314 | Lisp_Object window; |
| 315 | { |
| 316 | struct window *w = decode_window (window); |
| 317 | return MINI_WINDOW_P (w) ? Qt : Qnil; |
| 318 | } |
| 319 | |
| 320 | |
| 321 | DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p, |
| 322 | Spos_visible_in_window_p, 0, 3, 0, |
| 323 | doc: /* Return non-nil if position POS is currently on the frame in WINDOW. |
| 324 | Return nil if that position is scrolled vertically out of view. |
| 325 | If a character is only partially visible, nil is returned, unless the |
| 326 | optional argument PARTIALLY is non-nil. |
| 327 | If POS is only out of view because of horizontal scrolling, return non-nil. |
| 328 | POS defaults to point in WINDOW; WINDOW defaults to the selected window. |
| 329 | |
| 330 | If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil, |
| 331 | return value is a list (X Y PARTIAL) where X and Y are the pixel coordinates |
| 332 | relative to the top left corner of the window. PARTIAL is nil if the character |
| 333 | after POS is fully visible; otherwise it is a cons (RTOP . RBOT) where RTOP |
| 334 | and RBOT are the number of pixels invisible at the top and bottom of the row. */) |
| 335 | (pos, window, partially) |
| 336 | Lisp_Object pos, window, partially; |
| 337 | { |
| 338 | register struct window *w; |
| 339 | register int posint; |
| 340 | register struct buffer *buf; |
| 341 | struct text_pos top; |
| 342 | Lisp_Object in_window = Qnil; |
| 343 | int rtop, rbot, fully_p = 1; |
| 344 | int x, y; |
| 345 | |
| 346 | w = decode_window (window); |
| 347 | buf = XBUFFER (w->buffer); |
| 348 | SET_TEXT_POS_FROM_MARKER (top, w->start); |
| 349 | |
| 350 | if (!NILP (pos)) |
| 351 | { |
| 352 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 353 | posint = XINT (pos); |
| 354 | } |
| 355 | else if (w == XWINDOW (selected_window)) |
| 356 | posint = PT; |
| 357 | else |
| 358 | posint = XMARKER (w->pointm)->charpos; |
| 359 | |
| 360 | /* If position is above window start or outside buffer boundaries, |
| 361 | or if window start is out of range, position is not visible. */ |
| 362 | if (posint >= CHARPOS (top) |
| 363 | && posint <= BUF_ZV (buf) |
| 364 | && CHARPOS (top) >= BUF_BEGV (buf) |
| 365 | && CHARPOS (top) <= BUF_ZV (buf) |
| 366 | && pos_visible_p (w, posint, &x, &y, &rtop, &rbot, NILP (partially)) |
| 367 | && (fully_p = !rtop && !rbot, (!NILP (partially) || fully_p))) |
| 368 | in_window = Qt; |
| 369 | |
| 370 | if (!NILP (in_window) && !NILP (partially)) |
| 371 | in_window = Fcons (make_number (x), |
| 372 | Fcons (make_number (y), |
| 373 | Fcons ((fully_p ? Qnil |
| 374 | : Fcons (make_number (rtop), |
| 375 | make_number (rbot))), |
| 376 | Qnil))); |
| 377 | return in_window; |
| 378 | } |
| 379 | |
| 380 | \f |
| 381 | static struct window * |
| 382 | decode_window (window) |
| 383 | register Lisp_Object window; |
| 384 | { |
| 385 | if (NILP (window)) |
| 386 | return XWINDOW (selected_window); |
| 387 | |
| 388 | CHECK_LIVE_WINDOW (window); |
| 389 | return XWINDOW (window); |
| 390 | } |
| 391 | |
| 392 | static struct window * |
| 393 | decode_any_window (window) |
| 394 | register Lisp_Object window; |
| 395 | { |
| 396 | if (NILP (window)) |
| 397 | return XWINDOW (selected_window); |
| 398 | |
| 399 | CHECK_WINDOW (window); |
| 400 | return XWINDOW (window); |
| 401 | } |
| 402 | |
| 403 | DEFUN ("window-buffer", Fwindow_buffer, Swindow_buffer, 0, 1, 0, |
| 404 | doc: /* Return the buffer that WINDOW is displaying. |
| 405 | WINDOW defaults to the selected window. */) |
| 406 | (window) |
| 407 | Lisp_Object window; |
| 408 | { |
| 409 | return decode_window (window)->buffer; |
| 410 | } |
| 411 | |
| 412 | DEFUN ("window-height", Fwindow_height, Swindow_height, 0, 1, 0, |
| 413 | doc: /* Return the number of lines in WINDOW (including its mode line). */) |
| 414 | (window) |
| 415 | Lisp_Object window; |
| 416 | { |
| 417 | return decode_any_window (window)->total_lines; |
| 418 | } |
| 419 | |
| 420 | DEFUN ("window-width", Fwindow_width, Swindow_width, 0, 1, 0, |
| 421 | doc: /* Return the number of display columns in WINDOW. |
| 422 | This is the width that is usable columns available for text in WINDOW. |
| 423 | If you want to find out how many columns WINDOW takes up, |
| 424 | use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */) |
| 425 | (window) |
| 426 | Lisp_Object window; |
| 427 | { |
| 428 | return make_number (window_box_text_cols (decode_any_window (window))); |
| 429 | } |
| 430 | |
| 431 | DEFUN ("window-hscroll", Fwindow_hscroll, Swindow_hscroll, 0, 1, 0, |
| 432 | doc: /* Return the number of columns by which WINDOW is scrolled from left margin. */) |
| 433 | (window) |
| 434 | Lisp_Object window; |
| 435 | { |
| 436 | return decode_window (window)->hscroll; |
| 437 | } |
| 438 | |
| 439 | DEFUN ("set-window-hscroll", Fset_window_hscroll, Sset_window_hscroll, 2, 2, 0, |
| 440 | doc: /* Set number of columns WINDOW is scrolled from left margin to NCOL. |
| 441 | Return NCOL. NCOL should be zero or positive. |
| 442 | |
| 443 | Note that if `automatic-hscrolling' is non-nil, you cannot scroll the |
| 444 | window so that the location of point becomes invisible. */) |
| 445 | (window, ncol) |
| 446 | Lisp_Object window, ncol; |
| 447 | { |
| 448 | struct window *w = decode_window (window); |
| 449 | int hscroll; |
| 450 | |
| 451 | CHECK_NUMBER (ncol); |
| 452 | hscroll = max (0, XINT (ncol)); |
| 453 | |
| 454 | /* Prevent redisplay shortcuts when changing the hscroll. */ |
| 455 | if (XINT (w->hscroll) != hscroll) |
| 456 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 457 | |
| 458 | w->hscroll = make_number (hscroll); |
| 459 | return ncol; |
| 460 | } |
| 461 | |
| 462 | DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger, |
| 463 | Swindow_redisplay_end_trigger, 0, 1, 0, |
| 464 | doc: /* Return WINDOW's redisplay end trigger value. |
| 465 | See `set-window-redisplay-end-trigger' for more information. */) |
| 466 | (window) |
| 467 | Lisp_Object window; |
| 468 | { |
| 469 | return decode_window (window)->redisplay_end_trigger; |
| 470 | } |
| 471 | |
| 472 | DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger, |
| 473 | Sset_window_redisplay_end_trigger, 2, 2, 0, |
| 474 | doc: /* Set WINDOW's redisplay end trigger value to VALUE. |
| 475 | VALUE should be a buffer position (typically a marker) or nil. |
| 476 | If it is a buffer position, then if redisplay in WINDOW reaches a position |
| 477 | beyond VALUE, the functions in `redisplay-end-trigger-functions' are called |
| 478 | with two arguments: WINDOW, and the end trigger value. |
| 479 | Afterwards the end-trigger value is reset to nil. */) |
| 480 | (window, value) |
| 481 | register Lisp_Object window, value; |
| 482 | { |
| 483 | register struct window *w; |
| 484 | |
| 485 | w = decode_window (window); |
| 486 | w->redisplay_end_trigger = value; |
| 487 | return value; |
| 488 | } |
| 489 | |
| 490 | DEFUN ("window-edges", Fwindow_edges, Swindow_edges, 0, 1, 0, |
| 491 | doc: /* Return a list of the edge coordinates of WINDOW. |
| 492 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame. |
| 493 | RIGHT is one more than the rightmost column occupied by WINDOW, |
| 494 | and BOTTOM is one more than the bottommost row occupied by WINDOW. |
| 495 | The edges include the space used by the window's scroll bar, |
| 496 | display margins, fringes, header line, and mode line, if it has them. |
| 497 | To get the edges of the actual text area, use `window-inside-edges'. */) |
| 498 | (window) |
| 499 | Lisp_Object window; |
| 500 | { |
| 501 | register struct window *w = decode_any_window (window); |
| 502 | |
| 503 | return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w)), |
| 504 | Fcons (make_number (WINDOW_TOP_EDGE_LINE (w)), |
| 505 | Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w)), |
| 506 | Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w)), |
| 507 | Qnil)))); |
| 508 | } |
| 509 | |
| 510 | DEFUN ("window-pixel-edges", Fwindow_pixel_edges, Swindow_pixel_edges, 0, 1, 0, |
| 511 | doc: /* Return a list of the edge pixel coordinates of WINDOW. |
| 512 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame. |
| 513 | RIGHT is one more than the rightmost x position occupied by WINDOW, |
| 514 | and BOTTOM is one more than the bottommost y position occupied by WINDOW. |
| 515 | The pixel edges include the space used by the window's scroll bar, |
| 516 | display margins, fringes, header line, and mode line, if it has them. |
| 517 | To get the edges of the actual text area, use `window-inside-pixel-edges'. */) |
| 518 | (window) |
| 519 | Lisp_Object window; |
| 520 | { |
| 521 | register struct window *w = decode_any_window (window); |
| 522 | |
| 523 | return Fcons (make_number (WINDOW_LEFT_EDGE_X (w)), |
| 524 | Fcons (make_number (WINDOW_TOP_EDGE_Y (w)), |
| 525 | Fcons (make_number (WINDOW_RIGHT_EDGE_X (w)), |
| 526 | Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w)), |
| 527 | Qnil)))); |
| 528 | } |
| 529 | |
| 530 | DEFUN ("window-inside-edges", Fwindow_inside_edges, Swindow_inside_edges, 0, 1, 0, |
| 531 | doc: /* Return a list of the edge coordinates of WINDOW. |
| 532 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame. |
| 533 | RIGHT is one more than the rightmost column used by text in WINDOW, |
| 534 | and BOTTOM is one more than the bottommost row used by text in WINDOW. |
| 535 | The inside edges do not include the space used by the window's scroll bar, |
| 536 | display margins, fringes, header line, and/or mode line. */) |
| 537 | (window) |
| 538 | Lisp_Object window; |
| 539 | { |
| 540 | register struct window *w = decode_any_window (window); |
| 541 | |
| 542 | return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w) |
| 543 | + WINDOW_LEFT_MARGIN_COLS (w) |
| 544 | + WINDOW_LEFT_FRINGE_COLS (w)), |
| 545 | make_number (WINDOW_TOP_EDGE_LINE (w) |
| 546 | + WINDOW_HEADER_LINE_LINES (w)), |
| 547 | make_number (WINDOW_BOX_RIGHT_EDGE_COL (w) |
| 548 | - WINDOW_RIGHT_MARGIN_COLS (w) |
| 549 | - WINDOW_RIGHT_FRINGE_COLS (w)), |
| 550 | make_number (WINDOW_BOTTOM_EDGE_LINE (w) |
| 551 | - WINDOW_MODE_LINE_LINES (w))); |
| 552 | } |
| 553 | |
| 554 | DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges, Swindow_inside_pixel_edges, 0, 1, 0, |
| 555 | doc: /* Return a list of the edge pixel coordinates of WINDOW. |
| 556 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame. |
| 557 | RIGHT is one more than the rightmost x position used by text in WINDOW, |
| 558 | and BOTTOM is one more than the bottommost y position used by text in WINDOW. |
| 559 | The inside edges do not include the space used by the window's scroll bar, |
| 560 | display margins, fringes, header line, and/or mode line. */) |
| 561 | (window) |
| 562 | Lisp_Object window; |
| 563 | { |
| 564 | register struct window *w = decode_any_window (window); |
| 565 | |
| 566 | return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w) |
| 567 | + WINDOW_LEFT_MARGIN_WIDTH (w) |
| 568 | + WINDOW_LEFT_FRINGE_WIDTH (w)), |
| 569 | make_number (WINDOW_TOP_EDGE_Y (w) |
| 570 | + WINDOW_HEADER_LINE_HEIGHT (w)), |
| 571 | make_number (WINDOW_BOX_RIGHT_EDGE_X (w) |
| 572 | - WINDOW_RIGHT_MARGIN_WIDTH (w) |
| 573 | - WINDOW_RIGHT_FRINGE_WIDTH (w)), |
| 574 | make_number (WINDOW_BOTTOM_EDGE_Y (w) |
| 575 | - WINDOW_MODE_LINE_HEIGHT (w))); |
| 576 | } |
| 577 | |
| 578 | /* Test if the character at column *X, row *Y is within window W. |
| 579 | If it is not, return ON_NOTHING; |
| 580 | if it is in the window's text area, |
| 581 | set *x and *y to its location relative to the upper left corner |
| 582 | of the window, and |
| 583 | return ON_TEXT; |
| 584 | if it is on the window's modeline, return ON_MODE_LINE; |
| 585 | if it is on the border between the window and its right sibling, |
| 586 | return ON_VERTICAL_BORDER. |
| 587 | if it is on a scroll bar, |
| 588 | return ON_SCROLL_BAR. |
| 589 | if it is on the window's top line, return ON_HEADER_LINE; |
| 590 | if it is in left or right fringe of the window, |
| 591 | return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y |
| 592 | to window-relative coordinates; |
| 593 | if it is in the marginal area to the left/right of the window, |
| 594 | return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y |
| 595 | to window-relative coordinates. |
| 596 | |
| 597 | X and Y are frame relative pixel coordinates. */ |
| 598 | |
| 599 | static enum window_part |
| 600 | coordinates_in_window (w, x, y) |
| 601 | register struct window *w; |
| 602 | register int *x, *y; |
| 603 | { |
| 604 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 605 | int left_x, right_x, top_y, bottom_y; |
| 606 | enum window_part part; |
| 607 | int ux = FRAME_COLUMN_WIDTH (f); |
| 608 | int x0 = WINDOW_LEFT_EDGE_X (w); |
| 609 | int x1 = WINDOW_RIGHT_EDGE_X (w); |
| 610 | /* The width of the area where the vertical line can be dragged. |
| 611 | (Between mode lines for instance. */ |
| 612 | int grabbable_width = ux; |
| 613 | int lmargin_width, rmargin_width, text_left, text_right; |
| 614 | |
| 615 | /* In what's below, we subtract 1 when computing right_x because we |
| 616 | want the rightmost pixel, which is given by left_pixel+width-1. */ |
| 617 | if (w->pseudo_window_p) |
| 618 | { |
| 619 | left_x = 0; |
| 620 | right_x = WINDOW_TOTAL_WIDTH (w) - 1; |
| 621 | top_y = WINDOW_TOP_EDGE_Y (w); |
| 622 | bottom_y = WINDOW_BOTTOM_EDGE_Y (w); |
| 623 | } |
| 624 | else |
| 625 | { |
| 626 | left_x = WINDOW_BOX_LEFT_EDGE_X (w); |
| 627 | right_x = WINDOW_BOX_RIGHT_EDGE_X (w) - 1; |
| 628 | top_y = WINDOW_TOP_EDGE_Y (w); |
| 629 | bottom_y = WINDOW_BOTTOM_EDGE_Y (w); |
| 630 | } |
| 631 | |
| 632 | /* Outside any interesting row? */ |
| 633 | if (*y < top_y || *y >= bottom_y) |
| 634 | return ON_NOTHING; |
| 635 | |
| 636 | /* On the mode line or header line? If it's near the start of |
| 637 | the mode or header line of window that's has a horizontal |
| 638 | sibling, say it's on the vertical line. That's to be able |
| 639 | to resize windows horizontally in case we're using toolkit |
| 640 | scroll bars. */ |
| 641 | |
| 642 | if (WINDOW_WANTS_MODELINE_P (w) |
| 643 | && *y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w)) |
| 644 | { |
| 645 | part = ON_MODE_LINE; |
| 646 | |
| 647 | header_vertical_border_check: |
| 648 | /* We're somewhere on the mode line. We consider the place |
| 649 | between mode lines of horizontally adjacent mode lines |
| 650 | as the vertical border. If scroll bars on the left, |
| 651 | return the right window. */ |
| 652 | if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w) |
| 653 | || WINDOW_RIGHTMOST_P (w)) |
| 654 | { |
| 655 | if (!WINDOW_LEFTMOST_P (w) && abs (*x - x0) < grabbable_width) |
| 656 | return ON_VERTICAL_BORDER; |
| 657 | } |
| 658 | else |
| 659 | { |
| 660 | if (abs (*x - x1) < grabbable_width) |
| 661 | return ON_VERTICAL_BORDER; |
| 662 | } |
| 663 | |
| 664 | if (*x < x0 || *x >= x1) |
| 665 | return ON_NOTHING; |
| 666 | |
| 667 | /* Convert X and Y to window relative coordinates. |
| 668 | Mode line starts at left edge of window. */ |
| 669 | *x -= x0; |
| 670 | *y -= top_y; |
| 671 | return part; |
| 672 | } |
| 673 | |
| 674 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
| 675 | && *y < top_y + CURRENT_HEADER_LINE_HEIGHT (w)) |
| 676 | { |
| 677 | part = ON_HEADER_LINE; |
| 678 | goto header_vertical_border_check; |
| 679 | } |
| 680 | |
| 681 | if (*x < x0 || *x >= x1) |
| 682 | return ON_NOTHING; |
| 683 | |
| 684 | /* Outside any interesting column? */ |
| 685 | if (*x < left_x || *x > right_x) |
| 686 | return ON_SCROLL_BAR; |
| 687 | |
| 688 | lmargin_width = window_box_width (w, LEFT_MARGIN_AREA); |
| 689 | rmargin_width = window_box_width (w, RIGHT_MARGIN_AREA); |
| 690 | |
| 691 | text_left = window_box_left (w, TEXT_AREA); |
| 692 | text_right = text_left + window_box_width (w, TEXT_AREA); |
| 693 | |
| 694 | if (FRAME_WINDOW_P (f)) |
| 695 | { |
| 696 | if (!w->pseudo_window_p |
| 697 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w) |
| 698 | && !WINDOW_RIGHTMOST_P (w) |
| 699 | && (abs (*x - right_x) < grabbable_width)) |
| 700 | return ON_VERTICAL_BORDER; |
| 701 | } |
| 702 | else |
| 703 | { |
| 704 | /* Need to say "*x > right_x" rather than >=, since on character |
| 705 | terminals, the vertical line's x coordinate is right_x. */ |
| 706 | if (!w->pseudo_window_p |
| 707 | && !WINDOW_RIGHTMOST_P (w) |
| 708 | && *x > right_x - ux) |
| 709 | { |
| 710 | /* On the border on the right side of the window? Assume that |
| 711 | this area begins at RIGHT_X minus a canonical char width. */ |
| 712 | return ON_VERTICAL_BORDER; |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | if (*x < text_left) |
| 717 | { |
| 718 | if (lmargin_width > 0 |
| 719 | && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
| 720 | ? (*x >= left_x + WINDOW_LEFT_FRINGE_WIDTH (w)) |
| 721 | : (*x < left_x + lmargin_width))) |
| 722 | { |
| 723 | *x -= left_x; |
| 724 | if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)) |
| 725 | *x -= WINDOW_LEFT_FRINGE_WIDTH (w); |
| 726 | *y -= top_y; |
| 727 | return ON_LEFT_MARGIN; |
| 728 | } |
| 729 | |
| 730 | /* Convert X and Y to window-relative pixel coordinates. */ |
| 731 | *x -= left_x; |
| 732 | *y -= top_y; |
| 733 | return ON_LEFT_FRINGE; |
| 734 | } |
| 735 | |
| 736 | if (*x >= text_right) |
| 737 | { |
| 738 | if (rmargin_width > 0 |
| 739 | && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
| 740 | ? (*x < right_x - WINDOW_RIGHT_FRINGE_WIDTH (w)) |
| 741 | : (*x >= right_x - rmargin_width))) |
| 742 | { |
| 743 | *x -= right_x; |
| 744 | if (!WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)) |
| 745 | *x -= WINDOW_RIGHT_FRINGE_WIDTH (w); |
| 746 | *y -= top_y; |
| 747 | return ON_RIGHT_MARGIN; |
| 748 | } |
| 749 | |
| 750 | /* Convert X and Y to window-relative pixel coordinates. */ |
| 751 | *x -= left_x + WINDOW_LEFT_FRINGE_WIDTH (w); |
| 752 | *y -= top_y; |
| 753 | return ON_RIGHT_FRINGE; |
| 754 | } |
| 755 | |
| 756 | /* Everything special ruled out - must be on text area */ |
| 757 | *x -= left_x + WINDOW_LEFT_FRINGE_WIDTH (w); |
| 758 | *y -= top_y; |
| 759 | return ON_TEXT; |
| 760 | } |
| 761 | |
| 762 | |
| 763 | DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p, |
| 764 | Scoordinates_in_window_p, 2, 2, 0, |
| 765 | doc: /* Return non-nil if COORDINATES are in WINDOW. |
| 766 | COORDINATES is a cons of the form (X . Y), X and Y being distances |
| 767 | measured in characters from the upper-left corner of the frame. |
| 768 | \(0 . 0) denotes the character in the upper left corner of the |
| 769 | frame. |
| 770 | If COORDINATES are in the text portion of WINDOW, |
| 771 | the coordinates relative to the window are returned. |
| 772 | If they are in the mode line of WINDOW, `mode-line' is returned. |
| 773 | If they are in the top mode line of WINDOW, `header-line' is returned. |
| 774 | If they are in the left fringe of WINDOW, `left-fringe' is returned. |
| 775 | If they are in the right fringe of WINDOW, `right-fringe' is returned. |
| 776 | If they are on the border between WINDOW and its right sibling, |
| 777 | `vertical-line' is returned. |
| 778 | If they are in the windows's left or right marginal areas, `left-margin'\n\ |
| 779 | or `right-margin' is returned. */) |
| 780 | (coordinates, window) |
| 781 | register Lisp_Object coordinates, window; |
| 782 | { |
| 783 | struct window *w; |
| 784 | struct frame *f; |
| 785 | int x, y; |
| 786 | Lisp_Object lx, ly; |
| 787 | |
| 788 | CHECK_WINDOW (window); |
| 789 | w = XWINDOW (window); |
| 790 | f = XFRAME (w->frame); |
| 791 | CHECK_CONS (coordinates); |
| 792 | lx = Fcar (coordinates); |
| 793 | ly = Fcdr (coordinates); |
| 794 | CHECK_NUMBER_OR_FLOAT (lx); |
| 795 | CHECK_NUMBER_OR_FLOAT (ly); |
| 796 | x = FRAME_PIXEL_X_FROM_CANON_X (f, lx) + FRAME_INTERNAL_BORDER_WIDTH (f); |
| 797 | y = FRAME_PIXEL_Y_FROM_CANON_Y (f, ly) + FRAME_INTERNAL_BORDER_WIDTH (f); |
| 798 | |
| 799 | switch (coordinates_in_window (w, &x, &y)) |
| 800 | { |
| 801 | case ON_NOTHING: |
| 802 | return Qnil; |
| 803 | |
| 804 | case ON_TEXT: |
| 805 | /* X and Y are now window relative pixel coordinates. Convert |
| 806 | them to canonical char units before returning them. */ |
| 807 | return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f, x), |
| 808 | FRAME_CANON_Y_FROM_PIXEL_Y (f, y)); |
| 809 | |
| 810 | case ON_MODE_LINE: |
| 811 | return Qmode_line; |
| 812 | |
| 813 | case ON_VERTICAL_BORDER: |
| 814 | return Qvertical_line; |
| 815 | |
| 816 | case ON_HEADER_LINE: |
| 817 | return Qheader_line; |
| 818 | |
| 819 | case ON_LEFT_FRINGE: |
| 820 | return Qleft_fringe; |
| 821 | |
| 822 | case ON_RIGHT_FRINGE: |
| 823 | return Qright_fringe; |
| 824 | |
| 825 | case ON_LEFT_MARGIN: |
| 826 | return Qleft_margin; |
| 827 | |
| 828 | case ON_RIGHT_MARGIN: |
| 829 | return Qright_margin; |
| 830 | |
| 831 | case ON_SCROLL_BAR: |
| 832 | /* Historically we are supposed to return nil in this case. */ |
| 833 | return Qnil; |
| 834 | |
| 835 | default: |
| 836 | abort (); |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | |
| 841 | /* Callback for foreach_window, used in window_from_coordinates. |
| 842 | Check if window W contains coordinates specified by USER_DATA which |
| 843 | is actually a pointer to a struct check_window_data CW. |
| 844 | |
| 845 | Check if window W contains coordinates *CW->x and *CW->y. If it |
| 846 | does, return W in *CW->window, as Lisp_Object, and return in |
| 847 | *CW->part the part of the window under coordinates *X,*Y. Return |
| 848 | zero from this function to stop iterating over windows. */ |
| 849 | |
| 850 | struct check_window_data |
| 851 | { |
| 852 | Lisp_Object *window; |
| 853 | int *x, *y; |
| 854 | enum window_part *part; |
| 855 | }; |
| 856 | |
| 857 | static int |
| 858 | check_window_containing (w, user_data) |
| 859 | struct window *w; |
| 860 | void *user_data; |
| 861 | { |
| 862 | struct check_window_data *cw = (struct check_window_data *) user_data; |
| 863 | enum window_part found; |
| 864 | int continue_p = 1; |
| 865 | |
| 866 | found = coordinates_in_window (w, cw->x, cw->y); |
| 867 | if (found != ON_NOTHING) |
| 868 | { |
| 869 | *cw->part = found; |
| 870 | XSETWINDOW (*cw->window, w); |
| 871 | continue_p = 0; |
| 872 | } |
| 873 | |
| 874 | return continue_p; |
| 875 | } |
| 876 | |
| 877 | |
| 878 | /* Find the window containing frame-relative pixel position X/Y and |
| 879 | return it as a Lisp_Object. |
| 880 | |
| 881 | If X, Y is on one of the window's special `window_part' elements, |
| 882 | set *PART to the id of that element, and return X and Y converted |
| 883 | to window relative coordinates in WX and WY. |
| 884 | |
| 885 | If there is no window under X, Y return nil and leave *PART |
| 886 | unmodified. TOOL_BAR_P non-zero means detect tool-bar windows. |
| 887 | |
| 888 | This function was previously implemented with a loop cycling over |
| 889 | windows with Fnext_window, and starting with the frame's selected |
| 890 | window. It turned out that this doesn't work with an |
| 891 | implementation of next_window using Vwindow_list, because |
| 892 | FRAME_SELECTED_WINDOW (F) is not always contained in the window |
| 893 | tree of F when this function is called asynchronously from |
| 894 | note_mouse_highlight. The original loop didn't terminate in this |
| 895 | case. */ |
| 896 | |
| 897 | Lisp_Object |
| 898 | window_from_coordinates (f, x, y, part, wx, wy, tool_bar_p) |
| 899 | struct frame *f; |
| 900 | int x, y; |
| 901 | enum window_part *part; |
| 902 | int *wx, *wy; |
| 903 | int tool_bar_p; |
| 904 | { |
| 905 | Lisp_Object window; |
| 906 | struct check_window_data cw; |
| 907 | enum window_part dummy; |
| 908 | |
| 909 | if (part == 0) |
| 910 | part = &dummy; |
| 911 | |
| 912 | window = Qnil; |
| 913 | cw.window = &window, cw.x = &x, cw.y = &y; cw.part = part; |
| 914 | foreach_window (f, check_window_containing, &cw); |
| 915 | |
| 916 | /* If not found above, see if it's in the tool bar window, if a tool |
| 917 | bar exists. */ |
| 918 | if (NILP (window) |
| 919 | && tool_bar_p |
| 920 | && WINDOWP (f->tool_bar_window) |
| 921 | && WINDOW_TOTAL_LINES (XWINDOW (f->tool_bar_window)) > 0 |
| 922 | && (coordinates_in_window (XWINDOW (f->tool_bar_window), &x, &y) |
| 923 | != ON_NOTHING)) |
| 924 | { |
| 925 | *part = ON_TEXT; |
| 926 | window = f->tool_bar_window; |
| 927 | } |
| 928 | |
| 929 | if (wx) *wx = x; |
| 930 | if (wy) *wy = y; |
| 931 | |
| 932 | return window; |
| 933 | } |
| 934 | |
| 935 | DEFUN ("window-at", Fwindow_at, Swindow_at, 2, 3, 0, |
| 936 | doc: /* Return window containing coordinates X and Y on FRAME. |
| 937 | If omitted, FRAME defaults to the currently selected frame. |
| 938 | The top left corner of the frame is considered to be row 0, |
| 939 | column 0. */) |
| 940 | (x, y, frame) |
| 941 | Lisp_Object x, y, frame; |
| 942 | { |
| 943 | struct frame *f; |
| 944 | |
| 945 | if (NILP (frame)) |
| 946 | frame = selected_frame; |
| 947 | CHECK_LIVE_FRAME (frame); |
| 948 | f = XFRAME (frame); |
| 949 | |
| 950 | /* Check that arguments are integers or floats. */ |
| 951 | CHECK_NUMBER_OR_FLOAT (x); |
| 952 | CHECK_NUMBER_OR_FLOAT (y); |
| 953 | |
| 954 | return window_from_coordinates (f, |
| 955 | (FRAME_PIXEL_X_FROM_CANON_X (f, x) |
| 956 | + FRAME_INTERNAL_BORDER_WIDTH (f)), |
| 957 | (FRAME_PIXEL_Y_FROM_CANON_Y (f, y) |
| 958 | + FRAME_INTERNAL_BORDER_WIDTH (f)), |
| 959 | 0, 0, 0, 0); |
| 960 | } |
| 961 | |
| 962 | DEFUN ("window-point", Fwindow_point, Swindow_point, 0, 1, 0, |
| 963 | doc: /* Return current value of point in WINDOW. |
| 964 | For a nonselected window, this is the value point would have |
| 965 | if that window were selected. |
| 966 | |
| 967 | Note that, when WINDOW is the selected window and its buffer |
| 968 | is also currently selected, the value returned is the same as (point). |
| 969 | It would be more strictly correct to return the `top-level' value |
| 970 | of point, outside of any save-excursion forms. |
| 971 | But that is hard to define. */) |
| 972 | (window) |
| 973 | Lisp_Object window; |
| 974 | { |
| 975 | register struct window *w = decode_window (window); |
| 976 | |
| 977 | if (w == XWINDOW (selected_window) |
| 978 | && current_buffer == XBUFFER (w->buffer)) |
| 979 | return Fpoint (); |
| 980 | return Fmarker_position (w->pointm); |
| 981 | } |
| 982 | |
| 983 | DEFUN ("window-start", Fwindow_start, Swindow_start, 0, 1, 0, |
| 984 | doc: /* Return position at which display currently starts in WINDOW. |
| 985 | This is updated by redisplay or by calling `set-window-start'. */) |
| 986 | (window) |
| 987 | Lisp_Object window; |
| 988 | { |
| 989 | return Fmarker_position (decode_window (window)->start); |
| 990 | } |
| 991 | |
| 992 | /* This is text temporarily removed from the doc string below. |
| 993 | |
| 994 | This function returns nil if the position is not currently known. |
| 995 | That happens when redisplay is preempted and doesn't finish. |
| 996 | If in that case you want to compute where the end of the window would |
| 997 | have been if redisplay had finished, do this: |
| 998 | (save-excursion |
| 999 | (goto-char (window-start window)) |
| 1000 | (vertical-motion (1- (window-height window)) window) |
| 1001 | (point))") */ |
| 1002 | |
| 1003 | DEFUN ("window-end", Fwindow_end, Swindow_end, 0, 2, 0, |
| 1004 | doc: /* Return position at which display currently ends in WINDOW. |
| 1005 | This is updated by redisplay, when it runs to completion. |
| 1006 | Simply changing the buffer text or setting `window-start' |
| 1007 | does not update this value. |
| 1008 | Return nil if there is no recorded value. \(This can happen if the |
| 1009 | last redisplay of WINDOW was preempted, and did not finish.) |
| 1010 | If UPDATE is non-nil, compute the up-to-date position |
| 1011 | if it isn't already recorded. */) |
| 1012 | (window, update) |
| 1013 | Lisp_Object window, update; |
| 1014 | { |
| 1015 | Lisp_Object value; |
| 1016 | struct window *w = decode_window (window); |
| 1017 | Lisp_Object buf; |
| 1018 | |
| 1019 | buf = w->buffer; |
| 1020 | CHECK_BUFFER (buf); |
| 1021 | |
| 1022 | #if 0 /* This change broke some things. We should make it later. */ |
| 1023 | /* If we don't know the end position, return nil. |
| 1024 | The user can compute it with vertical-motion if he wants to. |
| 1025 | It would be nicer to do it automatically, |
| 1026 | but that's so slow that it would probably bother people. */ |
| 1027 | if (NILP (w->window_end_valid)) |
| 1028 | return Qnil; |
| 1029 | #endif |
| 1030 | |
| 1031 | if (! NILP (update) |
| 1032 | && ! (! NILP (w->window_end_valid) |
| 1033 | && XFASTINT (w->last_modified) >= MODIFF)) |
| 1034 | { |
| 1035 | struct text_pos startp; |
| 1036 | struct it it; |
| 1037 | struct buffer *old_buffer = NULL, *b = XBUFFER (buf); |
| 1038 | |
| 1039 | /* In case W->start is out of the range, use something |
| 1040 | reasonable. This situation occurred when loading a file with |
| 1041 | `-l' containing a call to `rmail' with subsequent other |
| 1042 | commands. At the end, W->start happened to be BEG, while |
| 1043 | rmail had already narrowed the buffer. */ |
| 1044 | if (XMARKER (w->start)->charpos < BEGV) |
| 1045 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); |
| 1046 | else if (XMARKER (w->start)->charpos > ZV) |
| 1047 | SET_TEXT_POS (startp, ZV, ZV_BYTE); |
| 1048 | else |
| 1049 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
| 1050 | |
| 1051 | /* Cannot use Fvertical_motion because that function doesn't |
| 1052 | cope with variable-height lines. */ |
| 1053 | if (b != current_buffer) |
| 1054 | { |
| 1055 | old_buffer = current_buffer; |
| 1056 | set_buffer_internal (b); |
| 1057 | } |
| 1058 | |
| 1059 | start_display (&it, w, startp); |
| 1060 | move_it_vertically (&it, window_box_height (w)); |
| 1061 | if (it.current_y < it.last_visible_y) |
| 1062 | move_it_past_eol (&it); |
| 1063 | value = make_number (IT_CHARPOS (it)); |
| 1064 | |
| 1065 | if (old_buffer) |
| 1066 | set_buffer_internal (old_buffer); |
| 1067 | } |
| 1068 | else |
| 1069 | XSETINT (value, BUF_Z (XBUFFER (buf)) - XFASTINT (w->window_end_pos)); |
| 1070 | |
| 1071 | return value; |
| 1072 | } |
| 1073 | |
| 1074 | DEFUN ("set-window-point", Fset_window_point, Sset_window_point, 2, 2, 0, |
| 1075 | doc: /* Make point value in WINDOW be at position POS in WINDOW's buffer. |
| 1076 | Return POS. */) |
| 1077 | (window, pos) |
| 1078 | Lisp_Object window, pos; |
| 1079 | { |
| 1080 | register struct window *w = decode_window (window); |
| 1081 | |
| 1082 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1083 | if (w == XWINDOW (selected_window) |
| 1084 | && XBUFFER (w->buffer) == current_buffer) |
| 1085 | Fgoto_char (pos); |
| 1086 | else |
| 1087 | set_marker_restricted (w->pointm, pos, w->buffer); |
| 1088 | |
| 1089 | /* We have to make sure that redisplay updates the window to show |
| 1090 | the new value of point. */ |
| 1091 | if (!EQ (window, selected_window)) |
| 1092 | ++windows_or_buffers_changed; |
| 1093 | |
| 1094 | return pos; |
| 1095 | } |
| 1096 | |
| 1097 | DEFUN ("set-window-start", Fset_window_start, Sset_window_start, 2, 3, 0, |
| 1098 | doc: /* Make display in WINDOW start at position POS in WINDOW's buffer. |
| 1099 | Return POS. |
| 1100 | Optional third arg NOFORCE non-nil inhibits next redisplay |
| 1101 | from overriding motion of point in order to display at this exact start. */) |
| 1102 | (window, pos, noforce) |
| 1103 | Lisp_Object window, pos, noforce; |
| 1104 | { |
| 1105 | register struct window *w = decode_window (window); |
| 1106 | |
| 1107 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1108 | set_marker_restricted (w->start, pos, w->buffer); |
| 1109 | /* this is not right, but much easier than doing what is right. */ |
| 1110 | w->start_at_line_beg = Qnil; |
| 1111 | if (NILP (noforce)) |
| 1112 | w->force_start = Qt; |
| 1113 | w->update_mode_line = Qt; |
| 1114 | XSETFASTINT (w->last_modified, 0); |
| 1115 | XSETFASTINT (w->last_overlay_modified, 0); |
| 1116 | if (!EQ (window, selected_window)) |
| 1117 | windows_or_buffers_changed++; |
| 1118 | |
| 1119 | return pos; |
| 1120 | } |
| 1121 | |
| 1122 | DEFUN ("window-dedicated-p", Fwindow_dedicated_p, Swindow_dedicated_p, |
| 1123 | 1, 1, 0, |
| 1124 | doc: /* Return WINDOW's dedicated object, usually t or nil. |
| 1125 | See also `set-window-dedicated-p'. */) |
| 1126 | (window) |
| 1127 | Lisp_Object window; |
| 1128 | { |
| 1129 | return decode_window (window)->dedicated; |
| 1130 | } |
| 1131 | |
| 1132 | DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p, |
| 1133 | Sset_window_dedicated_p, 2, 2, 0, |
| 1134 | doc: /* Control whether WINDOW is dedicated to the buffer it displays. |
| 1135 | If it is dedicated, Emacs will not automatically change |
| 1136 | which buffer appears in it. |
| 1137 | The second argument is the new value for the dedication flag; |
| 1138 | non-nil means yes. */) |
| 1139 | (window, arg) |
| 1140 | Lisp_Object window, arg; |
| 1141 | { |
| 1142 | register struct window *w = decode_window (window); |
| 1143 | |
| 1144 | w->dedicated = arg; |
| 1145 | |
| 1146 | return w->dedicated; |
| 1147 | } |
| 1148 | |
| 1149 | DEFUN ("window-display-table", Fwindow_display_table, Swindow_display_table, |
| 1150 | 0, 1, 0, |
| 1151 | doc: /* Return the display-table that WINDOW is using. */) |
| 1152 | (window) |
| 1153 | Lisp_Object window; |
| 1154 | { |
| 1155 | return decode_window (window)->display_table; |
| 1156 | } |
| 1157 | |
| 1158 | /* Get the display table for use on window W. This is either W's |
| 1159 | display table or W's buffer's display table. Ignore the specified |
| 1160 | tables if they are not valid; if no valid table is specified, |
| 1161 | return 0. */ |
| 1162 | |
| 1163 | struct Lisp_Char_Table * |
| 1164 | window_display_table (w) |
| 1165 | struct window *w; |
| 1166 | { |
| 1167 | struct Lisp_Char_Table *dp = NULL; |
| 1168 | |
| 1169 | if (DISP_TABLE_P (w->display_table)) |
| 1170 | dp = XCHAR_TABLE (w->display_table); |
| 1171 | else if (BUFFERP (w->buffer)) |
| 1172 | { |
| 1173 | struct buffer *b = XBUFFER (w->buffer); |
| 1174 | |
| 1175 | if (DISP_TABLE_P (b->display_table)) |
| 1176 | dp = XCHAR_TABLE (b->display_table); |
| 1177 | else if (DISP_TABLE_P (Vstandard_display_table)) |
| 1178 | dp = XCHAR_TABLE (Vstandard_display_table); |
| 1179 | } |
| 1180 | |
| 1181 | return dp; |
| 1182 | } |
| 1183 | |
| 1184 | DEFUN ("set-window-display-table", Fset_window_display_table, Sset_window_display_table, 2, 2, 0, |
| 1185 | doc: /* Set WINDOW's display-table to TABLE. */) |
| 1186 | (window, table) |
| 1187 | register Lisp_Object window, table; |
| 1188 | { |
| 1189 | register struct window *w; |
| 1190 | |
| 1191 | w = decode_window (window); |
| 1192 | w->display_table = table; |
| 1193 | return table; |
| 1194 | } |
| 1195 | \f |
| 1196 | /* Record info on buffer window w is displaying |
| 1197 | when it is about to cease to display that buffer. */ |
| 1198 | static void |
| 1199 | unshow_buffer (w) |
| 1200 | register struct window *w; |
| 1201 | { |
| 1202 | Lisp_Object buf; |
| 1203 | struct buffer *b; |
| 1204 | |
| 1205 | buf = w->buffer; |
| 1206 | b = XBUFFER (buf); |
| 1207 | if (b != XMARKER (w->pointm)->buffer) |
| 1208 | abort (); |
| 1209 | |
| 1210 | #if 0 |
| 1211 | if (w == XWINDOW (selected_window) |
| 1212 | || ! EQ (buf, XWINDOW (selected_window)->buffer)) |
| 1213 | /* Do this except when the selected window's buffer |
| 1214 | is being removed from some other window. */ |
| 1215 | #endif |
| 1216 | /* last_window_start records the start position that this buffer |
| 1217 | had in the last window to be disconnected from it. |
| 1218 | Now that this statement is unconditional, |
| 1219 | it is possible for the buffer to be displayed in the |
| 1220 | selected window, while last_window_start reflects another |
| 1221 | window which was recently showing the same buffer. |
| 1222 | Some people might say that might be a good thing. Let's see. */ |
| 1223 | b->last_window_start = marker_position (w->start); |
| 1224 | |
| 1225 | /* Point in the selected window's buffer |
| 1226 | is actually stored in that buffer, and the window's pointm isn't used. |
| 1227 | So don't clobber point in that buffer. */ |
| 1228 | if (! EQ (buf, XWINDOW (selected_window)->buffer) |
| 1229 | /* This line helps to fix Horsley's testbug.el bug. */ |
| 1230 | && !(WINDOWP (b->last_selected_window) |
| 1231 | && w != XWINDOW (b->last_selected_window) |
| 1232 | && EQ (buf, XWINDOW (b->last_selected_window)->buffer))) |
| 1233 | temp_set_point_both (b, |
| 1234 | clip_to_bounds (BUF_BEGV (b), |
| 1235 | XMARKER (w->pointm)->charpos, |
| 1236 | BUF_ZV (b)), |
| 1237 | clip_to_bounds (BUF_BEGV_BYTE (b), |
| 1238 | marker_byte_position (w->pointm), |
| 1239 | BUF_ZV_BYTE (b))); |
| 1240 | |
| 1241 | if (WINDOWP (b->last_selected_window) |
| 1242 | && w == XWINDOW (b->last_selected_window)) |
| 1243 | b->last_selected_window = Qnil; |
| 1244 | } |
| 1245 | |
| 1246 | /* Put replacement into the window structure in place of old. */ |
| 1247 | static void |
| 1248 | replace_window (old, replacement) |
| 1249 | Lisp_Object old, replacement; |
| 1250 | { |
| 1251 | register Lisp_Object tem; |
| 1252 | register struct window *o = XWINDOW (old), *p = XWINDOW (replacement); |
| 1253 | |
| 1254 | /* If OLD is its frame's root_window, then replacement is the new |
| 1255 | root_window for that frame. */ |
| 1256 | |
| 1257 | if (EQ (old, FRAME_ROOT_WINDOW (XFRAME (o->frame)))) |
| 1258 | FRAME_ROOT_WINDOW (XFRAME (o->frame)) = replacement; |
| 1259 | |
| 1260 | p->left_col = o->left_col; |
| 1261 | p->top_line = o->top_line; |
| 1262 | p->total_cols = o->total_cols; |
| 1263 | p->total_lines = o->total_lines; |
| 1264 | p->desired_matrix = p->current_matrix = 0; |
| 1265 | p->vscroll = 0; |
| 1266 | bzero (&p->cursor, sizeof (p->cursor)); |
| 1267 | bzero (&p->last_cursor, sizeof (p->last_cursor)); |
| 1268 | bzero (&p->phys_cursor, sizeof (p->phys_cursor)); |
| 1269 | p->phys_cursor_type = -1; |
| 1270 | p->phys_cursor_width = -1; |
| 1271 | p->must_be_updated_p = 0; |
| 1272 | p->pseudo_window_p = 0; |
| 1273 | XSETFASTINT (p->window_end_vpos, 0); |
| 1274 | XSETFASTINT (p->window_end_pos, 0); |
| 1275 | p->window_end_valid = Qnil; |
| 1276 | p->frozen_window_start_p = 0; |
| 1277 | p->orig_top_line = p->orig_total_lines = Qnil; |
| 1278 | |
| 1279 | p->next = tem = o->next; |
| 1280 | if (!NILP (tem)) |
| 1281 | XWINDOW (tem)->prev = replacement; |
| 1282 | |
| 1283 | p->prev = tem = o->prev; |
| 1284 | if (!NILP (tem)) |
| 1285 | XWINDOW (tem)->next = replacement; |
| 1286 | |
| 1287 | p->parent = tem = o->parent; |
| 1288 | if (!NILP (tem)) |
| 1289 | { |
| 1290 | if (EQ (XWINDOW (tem)->vchild, old)) |
| 1291 | XWINDOW (tem)->vchild = replacement; |
| 1292 | if (EQ (XWINDOW (tem)->hchild, old)) |
| 1293 | XWINDOW (tem)->hchild = replacement; |
| 1294 | } |
| 1295 | |
| 1296 | /*** Here, if replacement is a vertical combination |
| 1297 | and so is its new parent, we should make replacement's |
| 1298 | children be children of that parent instead. ***/ |
| 1299 | } |
| 1300 | |
| 1301 | DEFUN ("delete-window", Fdelete_window, Sdelete_window, 0, 1, "", |
| 1302 | doc: /* Remove WINDOW from the display. Default is selected window. */) |
| 1303 | (window) |
| 1304 | register Lisp_Object window; |
| 1305 | { |
| 1306 | delete_window (window); |
| 1307 | |
| 1308 | if (! NILP (Vwindow_configuration_change_hook) |
| 1309 | && ! NILP (Vrun_hooks)) |
| 1310 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 1311 | |
| 1312 | return Qnil; |
| 1313 | } |
| 1314 | |
| 1315 | void |
| 1316 | delete_window (window) |
| 1317 | register Lisp_Object window; |
| 1318 | { |
| 1319 | register Lisp_Object tem, parent, sib; |
| 1320 | register struct window *p; |
| 1321 | register struct window *par; |
| 1322 | struct frame *f; |
| 1323 | |
| 1324 | /* Because this function is called by other C code on non-leaf |
| 1325 | windows, the CHECK_LIVE_WINDOW macro would choke inappropriately, |
| 1326 | so we can't decode_window here. */ |
| 1327 | if (NILP (window)) |
| 1328 | window = selected_window; |
| 1329 | else |
| 1330 | CHECK_WINDOW (window); |
| 1331 | p = XWINDOW (window); |
| 1332 | |
| 1333 | /* It's okay to delete an already-deleted window. */ |
| 1334 | if (NILP (p->buffer) |
| 1335 | && NILP (p->hchild) |
| 1336 | && NILP (p->vchild)) |
| 1337 | return; |
| 1338 | |
| 1339 | parent = p->parent; |
| 1340 | if (NILP (parent)) |
| 1341 | error ("Attempt to delete minibuffer or sole ordinary window"); |
| 1342 | par = XWINDOW (parent); |
| 1343 | |
| 1344 | windows_or_buffers_changed++; |
| 1345 | Vwindow_list = Qnil; |
| 1346 | f = XFRAME (WINDOW_FRAME (p)); |
| 1347 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 1348 | |
| 1349 | /* Are we trying to delete any frame's selected window? */ |
| 1350 | { |
| 1351 | Lisp_Object swindow, pwindow; |
| 1352 | |
| 1353 | /* See if the frame's selected window is either WINDOW |
| 1354 | or any subwindow of it, by finding all that window's parents |
| 1355 | and comparing each one with WINDOW. */ |
| 1356 | swindow = FRAME_SELECTED_WINDOW (f); |
| 1357 | |
| 1358 | while (1) |
| 1359 | { |
| 1360 | pwindow = swindow; |
| 1361 | while (!NILP (pwindow)) |
| 1362 | { |
| 1363 | if (EQ (window, pwindow)) |
| 1364 | break; |
| 1365 | pwindow = XWINDOW (pwindow)->parent; |
| 1366 | } |
| 1367 | |
| 1368 | /* If the window being deleted is not a parent of SWINDOW, |
| 1369 | then SWINDOW is ok as the new selected window. */ |
| 1370 | if (!EQ (window, pwindow)) |
| 1371 | break; |
| 1372 | /* Otherwise, try another window for SWINDOW. */ |
| 1373 | swindow = Fnext_window (swindow, Qlambda, Qnil);; |
| 1374 | |
| 1375 | /* If we get back to the frame's selected window, |
| 1376 | it means there was no acceptable alternative, |
| 1377 | so we cannot delete. */ |
| 1378 | if (EQ (swindow, FRAME_SELECTED_WINDOW (f))) |
| 1379 | error ("Cannot delete window"); |
| 1380 | } |
| 1381 | |
| 1382 | /* If we need to change SWINDOW, do it. */ |
| 1383 | if (! EQ (swindow, FRAME_SELECTED_WINDOW (f))) |
| 1384 | { |
| 1385 | /* If we're about to delete the selected window on the |
| 1386 | selected frame, then we should use Fselect_window to select |
| 1387 | the new window. On the other hand, if we're about to |
| 1388 | delete the selected window on any other frame, we shouldn't do |
| 1389 | anything but set the frame's selected_window slot. */ |
| 1390 | if (EQ (FRAME_SELECTED_WINDOW (f), selected_window)) |
| 1391 | Fselect_window (swindow, Qnil); |
| 1392 | else |
| 1393 | FRAME_SELECTED_WINDOW (f) = swindow; |
| 1394 | } |
| 1395 | } |
| 1396 | |
| 1397 | tem = p->buffer; |
| 1398 | /* tem is null for dummy parent windows |
| 1399 | (which have inferiors but not any contents themselves) */ |
| 1400 | if (!NILP (tem)) |
| 1401 | { |
| 1402 | unshow_buffer (p); |
| 1403 | unchain_marker (XMARKER (p->pointm)); |
| 1404 | unchain_marker (XMARKER (p->start)); |
| 1405 | } |
| 1406 | |
| 1407 | /* Free window glyph matrices. It is sure that they are allocated |
| 1408 | again when ADJUST_GLYPHS is called. Block input so that expose |
| 1409 | events and other events that access glyph matrices are not |
| 1410 | processed while we are changing them. */ |
| 1411 | BLOCK_INPUT; |
| 1412 | free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 1413 | |
| 1414 | tem = p->next; |
| 1415 | if (!NILP (tem)) |
| 1416 | XWINDOW (tem)->prev = p->prev; |
| 1417 | |
| 1418 | tem = p->prev; |
| 1419 | if (!NILP (tem)) |
| 1420 | XWINDOW (tem)->next = p->next; |
| 1421 | |
| 1422 | if (EQ (window, par->hchild)) |
| 1423 | par->hchild = p->next; |
| 1424 | if (EQ (window, par->vchild)) |
| 1425 | par->vchild = p->next; |
| 1426 | |
| 1427 | /* Find one of our siblings to give our space to. */ |
| 1428 | sib = p->prev; |
| 1429 | if (NILP (sib)) |
| 1430 | { |
| 1431 | /* If p gives its space to its next sibling, that sibling needs |
| 1432 | to have its top/left side pulled back to where p's is. |
| 1433 | set_window_{height,width} will re-position the sibling's |
| 1434 | children. */ |
| 1435 | sib = p->next; |
| 1436 | XWINDOW (sib)->top_line = p->top_line; |
| 1437 | XWINDOW (sib)->left_col = p->left_col; |
| 1438 | } |
| 1439 | |
| 1440 | /* Stretch that sibling. */ |
| 1441 | if (!NILP (par->vchild)) |
| 1442 | set_window_height (sib, |
| 1443 | XFASTINT (XWINDOW (sib)->total_lines) + XFASTINT (p->total_lines), |
| 1444 | 1); |
| 1445 | if (!NILP (par->hchild)) |
| 1446 | set_window_width (sib, |
| 1447 | XFASTINT (XWINDOW (sib)->total_cols) + XFASTINT (p->total_cols), |
| 1448 | 1); |
| 1449 | |
| 1450 | /* If parent now has only one child, |
| 1451 | put the child into the parent's place. */ |
| 1452 | tem = par->hchild; |
| 1453 | if (NILP (tem)) |
| 1454 | tem = par->vchild; |
| 1455 | if (NILP (XWINDOW (tem)->next)) { |
| 1456 | replace_window (parent, tem); |
| 1457 | par = XWINDOW (tem); |
| 1458 | } |
| 1459 | |
| 1460 | /* Since we may be deleting combination windows, we must make sure that |
| 1461 | not only p but all its children have been marked as deleted. */ |
| 1462 | if (! NILP (p->hchild)) |
| 1463 | delete_all_subwindows (XWINDOW (p->hchild)); |
| 1464 | else if (! NILP (p->vchild)) |
| 1465 | delete_all_subwindows (XWINDOW (p->vchild)); |
| 1466 | |
| 1467 | /* Mark this window as deleted. */ |
| 1468 | p->buffer = p->hchild = p->vchild = Qnil; |
| 1469 | |
| 1470 | if (! NILP (par->parent)) |
| 1471 | par = XWINDOW (par->parent); |
| 1472 | |
| 1473 | /* Check if we have a v/hchild with a v/hchild. In that case remove |
| 1474 | one of them. */ |
| 1475 | |
| 1476 | if (! NILP (par->vchild) && ! NILP (XWINDOW (par->vchild)->vchild)) |
| 1477 | { |
| 1478 | p = XWINDOW (par->vchild); |
| 1479 | par->vchild = p->vchild; |
| 1480 | tem = p->vchild; |
| 1481 | } |
| 1482 | else if (! NILP (par->hchild) && ! NILP (XWINDOW (par->hchild)->hchild)) |
| 1483 | { |
| 1484 | p = XWINDOW (par->hchild); |
| 1485 | par->hchild = p->hchild; |
| 1486 | tem = p->hchild; |
| 1487 | } |
| 1488 | else |
| 1489 | p = 0; |
| 1490 | |
| 1491 | if (p) |
| 1492 | { |
| 1493 | while (! NILP (tem)) { |
| 1494 | XWINDOW (tem)->parent = p->parent; |
| 1495 | if (NILP (XWINDOW (tem)->next)) |
| 1496 | break; |
| 1497 | tem = XWINDOW (tem)->next; |
| 1498 | } |
| 1499 | if (! NILP (tem)) { |
| 1500 | /* The next of the v/hchild we are removing is now the next of the |
| 1501 | last child for the v/hchild: |
| 1502 | Before v/hchild -> v/hchild -> next1 -> next2 |
| 1503 | | |
| 1504 | -> next3 |
| 1505 | After: v/hchild -> next1 -> next2 -> next3 |
| 1506 | */ |
| 1507 | XWINDOW (tem)->next = p->next; |
| 1508 | if (! NILP (p->next)) |
| 1509 | XWINDOW (p->next)->prev = tem; |
| 1510 | } |
| 1511 | p->next = p->prev = p->vchild = p->hchild = p->buffer = Qnil; |
| 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | /* Adjust glyph matrices. */ |
| 1516 | adjust_glyphs (f); |
| 1517 | UNBLOCK_INPUT; |
| 1518 | } |
| 1519 | |
| 1520 | |
| 1521 | \f |
| 1522 | /*********************************************************************** |
| 1523 | Window List |
| 1524 | ***********************************************************************/ |
| 1525 | |
| 1526 | /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object |
| 1527 | pointer. This is a callback function for foreach_window, used in |
| 1528 | function window_list. */ |
| 1529 | |
| 1530 | static int |
| 1531 | add_window_to_list (w, user_data) |
| 1532 | struct window *w; |
| 1533 | void *user_data; |
| 1534 | { |
| 1535 | Lisp_Object *list = (Lisp_Object *) user_data; |
| 1536 | Lisp_Object window; |
| 1537 | XSETWINDOW (window, w); |
| 1538 | *list = Fcons (window, *list); |
| 1539 | return 1; |
| 1540 | } |
| 1541 | |
| 1542 | |
| 1543 | /* Return a list of all windows, for use by next_window. If |
| 1544 | Vwindow_list is a list, return that list. Otherwise, build a new |
| 1545 | list, cache it in Vwindow_list, and return that. */ |
| 1546 | |
| 1547 | static Lisp_Object |
| 1548 | window_list () |
| 1549 | { |
| 1550 | if (!CONSP (Vwindow_list)) |
| 1551 | { |
| 1552 | Lisp_Object tail; |
| 1553 | |
| 1554 | Vwindow_list = Qnil; |
| 1555 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
| 1556 | { |
| 1557 | Lisp_Object args[2]; |
| 1558 | |
| 1559 | /* We are visiting windows in canonical order, and add |
| 1560 | new windows at the front of args[1], which means we |
| 1561 | have to reverse this list at the end. */ |
| 1562 | args[1] = Qnil; |
| 1563 | foreach_window (XFRAME (XCAR (tail)), add_window_to_list, &args[1]); |
| 1564 | args[0] = Vwindow_list; |
| 1565 | args[1] = Fnreverse (args[1]); |
| 1566 | Vwindow_list = Fnconc (2, args); |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | return Vwindow_list; |
| 1571 | } |
| 1572 | |
| 1573 | |
| 1574 | /* Value is non-zero if WINDOW satisfies the constraints given by |
| 1575 | OWINDOW, MINIBUF and ALL_FRAMES. |
| 1576 | |
| 1577 | MINIBUF t means WINDOW may be minibuffer windows. |
| 1578 | `lambda' means WINDOW may not be a minibuffer window. |
| 1579 | a window means a specific minibuffer window |
| 1580 | |
| 1581 | ALL_FRAMES t means search all frames, |
| 1582 | nil means search just current frame, |
| 1583 | `visible' means search just visible frames, |
| 1584 | 0 means search visible and iconified frames, |
| 1585 | a window means search the frame that window belongs to, |
| 1586 | a frame means consider windows on that frame, only. */ |
| 1587 | |
| 1588 | static int |
| 1589 | candidate_window_p (window, owindow, minibuf, all_frames) |
| 1590 | Lisp_Object window, owindow, minibuf, all_frames; |
| 1591 | { |
| 1592 | struct window *w = XWINDOW (window); |
| 1593 | struct frame *f = XFRAME (w->frame); |
| 1594 | int candidate_p = 1; |
| 1595 | |
| 1596 | if (!BUFFERP (w->buffer)) |
| 1597 | candidate_p = 0; |
| 1598 | else if (MINI_WINDOW_P (w) |
| 1599 | && (EQ (minibuf, Qlambda) |
| 1600 | || (WINDOWP (minibuf) && !EQ (minibuf, window)))) |
| 1601 | { |
| 1602 | /* If MINIBUF is `lambda' don't consider any mini-windows. |
| 1603 | If it is a window, consider only that one. */ |
| 1604 | candidate_p = 0; |
| 1605 | } |
| 1606 | else if (EQ (all_frames, Qt)) |
| 1607 | candidate_p = 1; |
| 1608 | else if (NILP (all_frames)) |
| 1609 | { |
| 1610 | xassert (WINDOWP (owindow)); |
| 1611 | candidate_p = EQ (w->frame, XWINDOW (owindow)->frame); |
| 1612 | } |
| 1613 | else if (EQ (all_frames, Qvisible)) |
| 1614 | { |
| 1615 | FRAME_SAMPLE_VISIBILITY (f); |
| 1616 | candidate_p = FRAME_VISIBLE_P (f); |
| 1617 | } |
| 1618 | else if (INTEGERP (all_frames) && XINT (all_frames) == 0) |
| 1619 | { |
| 1620 | FRAME_SAMPLE_VISIBILITY (f); |
| 1621 | candidate_p = FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f); |
| 1622 | } |
| 1623 | else if (WINDOWP (all_frames)) |
| 1624 | candidate_p = (EQ (FRAME_MINIBUF_WINDOW (f), all_frames) |
| 1625 | || EQ (XWINDOW (all_frames)->frame, w->frame) |
| 1626 | || EQ (XWINDOW (all_frames)->frame, FRAME_FOCUS_FRAME (f))); |
| 1627 | else if (FRAMEP (all_frames)) |
| 1628 | candidate_p = EQ (all_frames, w->frame); |
| 1629 | |
| 1630 | return candidate_p; |
| 1631 | } |
| 1632 | |
| 1633 | |
| 1634 | /* Decode arguments as allowed by Fnext_window, Fprevious_window, and |
| 1635 | Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and |
| 1636 | ALL_FRAMES. */ |
| 1637 | |
| 1638 | static void |
| 1639 | decode_next_window_args (window, minibuf, all_frames) |
| 1640 | Lisp_Object *window, *minibuf, *all_frames; |
| 1641 | { |
| 1642 | if (NILP (*window)) |
| 1643 | *window = selected_window; |
| 1644 | else |
| 1645 | CHECK_LIVE_WINDOW (*window); |
| 1646 | |
| 1647 | /* MINIBUF nil may or may not include minibuffers. Decide if it |
| 1648 | does. */ |
| 1649 | if (NILP (*minibuf)) |
| 1650 | *minibuf = minibuf_level ? minibuf_window : Qlambda; |
| 1651 | else if (!EQ (*minibuf, Qt)) |
| 1652 | *minibuf = Qlambda; |
| 1653 | |
| 1654 | /* Now *MINIBUF can be t => count all minibuffer windows, `lambda' |
| 1655 | => count none of them, or a specific minibuffer window (the |
| 1656 | active one) to count. */ |
| 1657 | |
| 1658 | /* ALL_FRAMES nil doesn't specify which frames to include. */ |
| 1659 | if (NILP (*all_frames)) |
| 1660 | *all_frames = (!EQ (*minibuf, Qlambda) |
| 1661 | ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window)->frame)) |
| 1662 | : Qnil); |
| 1663 | else if (EQ (*all_frames, Qvisible)) |
| 1664 | ; |
| 1665 | else if (EQ (*all_frames, make_number (0))) |
| 1666 | ; |
| 1667 | else if (FRAMEP (*all_frames)) |
| 1668 | ; |
| 1669 | else if (!EQ (*all_frames, Qt)) |
| 1670 | *all_frames = Qnil; |
| 1671 | |
| 1672 | /* Now *ALL_FRAMES is t meaning search all frames, nil meaning |
| 1673 | search just current frame, `visible' meaning search just visible |
| 1674 | frames, 0 meaning search visible and iconified frames, or a |
| 1675 | window, meaning search the frame that window belongs to, or a |
| 1676 | frame, meaning consider windows on that frame, only. */ |
| 1677 | } |
| 1678 | |
| 1679 | |
| 1680 | /* Return the next or previous window of WINDOW in canonical ordering |
| 1681 | of windows. NEXT_P non-zero means return the next window. See the |
| 1682 | documentation string of next-window for the meaning of MINIBUF and |
| 1683 | ALL_FRAMES. */ |
| 1684 | |
| 1685 | static Lisp_Object |
| 1686 | next_window (window, minibuf, all_frames, next_p) |
| 1687 | Lisp_Object window, minibuf, all_frames; |
| 1688 | int next_p; |
| 1689 | { |
| 1690 | decode_next_window_args (&window, &minibuf, &all_frames); |
| 1691 | |
| 1692 | /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just |
| 1693 | return the first window on the frame. */ |
| 1694 | if (FRAMEP (all_frames) |
| 1695 | && !EQ (all_frames, XWINDOW (window)->frame)) |
| 1696 | return Fframe_first_window (all_frames); |
| 1697 | |
| 1698 | if (next_p) |
| 1699 | { |
| 1700 | Lisp_Object list; |
| 1701 | |
| 1702 | /* Find WINDOW in the list of all windows. */ |
| 1703 | list = Fmemq (window, window_list ()); |
| 1704 | |
| 1705 | /* Scan forward from WINDOW to the end of the window list. */ |
| 1706 | if (CONSP (list)) |
| 1707 | for (list = XCDR (list); CONSP (list); list = XCDR (list)) |
| 1708 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
| 1709 | break; |
| 1710 | |
| 1711 | /* Scan from the start of the window list up to WINDOW. */ |
| 1712 | if (!CONSP (list)) |
| 1713 | for (list = Vwindow_list; |
| 1714 | CONSP (list) && !EQ (XCAR (list), window); |
| 1715 | list = XCDR (list)) |
| 1716 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
| 1717 | break; |
| 1718 | |
| 1719 | if (CONSP (list)) |
| 1720 | window = XCAR (list); |
| 1721 | } |
| 1722 | else |
| 1723 | { |
| 1724 | Lisp_Object candidate, list; |
| 1725 | |
| 1726 | /* Scan through the list of windows for candidates. If there are |
| 1727 | candidate windows in front of WINDOW, the last one of these |
| 1728 | is the one we want. If there are candidates following WINDOW |
| 1729 | in the list, again the last one of these is the one we want. */ |
| 1730 | candidate = Qnil; |
| 1731 | for (list = window_list (); CONSP (list); list = XCDR (list)) |
| 1732 | { |
| 1733 | if (EQ (XCAR (list), window)) |
| 1734 | { |
| 1735 | if (WINDOWP (candidate)) |
| 1736 | break; |
| 1737 | } |
| 1738 | else if (candidate_window_p (XCAR (list), window, minibuf, |
| 1739 | all_frames)) |
| 1740 | candidate = XCAR (list); |
| 1741 | } |
| 1742 | |
| 1743 | if (WINDOWP (candidate)) |
| 1744 | window = candidate; |
| 1745 | } |
| 1746 | |
| 1747 | return window; |
| 1748 | } |
| 1749 | |
| 1750 | |
| 1751 | DEFUN ("next-window", Fnext_window, Snext_window, 0, 3, 0, |
| 1752 | doc: /* Return next window after WINDOW in canonical ordering of windows. |
| 1753 | If omitted, WINDOW defaults to the selected window. |
| 1754 | |
| 1755 | Optional second arg MINIBUF t means count the minibuffer window even |
| 1756 | if not active. MINIBUF nil or omitted means count the minibuffer iff |
| 1757 | it is active. MINIBUF neither t nor nil means not to count the |
| 1758 | minibuffer even if it is active. |
| 1759 | |
| 1760 | Several frames may share a single minibuffer; if the minibuffer |
| 1761 | counts, all windows on all frames that share that minibuffer count |
| 1762 | too. Therefore, `next-window' can be used to iterate through the |
| 1763 | set of windows even when the minibuffer is on another frame. If the |
| 1764 | minibuffer does not count, only windows from WINDOW's frame count. |
| 1765 | |
| 1766 | Optional third arg ALL-FRAMES t means include windows on all frames. |
| 1767 | ALL-FRAMES nil or omitted means cycle within the frames as specified |
| 1768 | above. ALL-FRAMES = `visible' means include windows on all visible frames. |
| 1769 | ALL-FRAMES = 0 means include windows on all visible and iconified frames. |
| 1770 | If ALL-FRAMES is a frame, restrict search to windows on that frame. |
| 1771 | Anything else means restrict to WINDOW's frame. |
| 1772 | |
| 1773 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use |
| 1774 | `next-window' to iterate through the entire cycle of acceptable |
| 1775 | windows, eventually ending up back at the window you started with. |
| 1776 | `previous-window' traverses the same cycle, in the reverse order. */) |
| 1777 | (window, minibuf, all_frames) |
| 1778 | Lisp_Object window, minibuf, all_frames; |
| 1779 | { |
| 1780 | return next_window (window, minibuf, all_frames, 1); |
| 1781 | } |
| 1782 | |
| 1783 | |
| 1784 | DEFUN ("previous-window", Fprevious_window, Sprevious_window, 0, 3, 0, |
| 1785 | doc: /* Return the window preceding WINDOW in canonical ordering of windows. |
| 1786 | If omitted, WINDOW defaults to the selected window. |
| 1787 | |
| 1788 | Optional second arg MINIBUF t means count the minibuffer window even |
| 1789 | if not active. MINIBUF nil or omitted means count the minibuffer iff |
| 1790 | it is active. MINIBUF neither t nor nil means not to count the |
| 1791 | minibuffer even if it is active. |
| 1792 | |
| 1793 | Several frames may share a single minibuffer; if the minibuffer |
| 1794 | counts, all windows on all frames that share that minibuffer count |
| 1795 | too. Therefore, `previous-window' can be used to iterate through |
| 1796 | the set of windows even when the minibuffer is on another frame. If |
| 1797 | the minibuffer does not count, only windows from WINDOW's frame count |
| 1798 | |
| 1799 | Optional third arg ALL-FRAMES t means include windows on all frames. |
| 1800 | ALL-FRAMES nil or omitted means cycle within the frames as specified |
| 1801 | above. ALL-FRAMES = `visible' means include windows on all visible frames. |
| 1802 | ALL-FRAMES = 0 means include windows on all visible and iconified frames. |
| 1803 | If ALL-FRAMES is a frame, restrict search to windows on that frame. |
| 1804 | Anything else means restrict to WINDOW's frame. |
| 1805 | |
| 1806 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use |
| 1807 | `previous-window' to iterate through the entire cycle of acceptable |
| 1808 | windows, eventually ending up back at the window you started with. |
| 1809 | `next-window' traverses the same cycle, in the reverse order. */) |
| 1810 | (window, minibuf, all_frames) |
| 1811 | Lisp_Object window, minibuf, all_frames; |
| 1812 | { |
| 1813 | return next_window (window, minibuf, all_frames, 0); |
| 1814 | } |
| 1815 | |
| 1816 | |
| 1817 | DEFUN ("other-window", Fother_window, Sother_window, 1, 2, "p", |
| 1818 | doc: /* Select the ARG'th different window on this frame. |
| 1819 | All windows on current frame are arranged in a cyclic order. |
| 1820 | This command selects the window ARG steps away in that order. |
| 1821 | A negative ARG moves in the opposite order. The optional second |
| 1822 | argument ALL_FRAMES has the same meaning as in `next-window', which see. */) |
| 1823 | (arg, all_frames) |
| 1824 | Lisp_Object arg, all_frames; |
| 1825 | { |
| 1826 | Lisp_Object window; |
| 1827 | int i; |
| 1828 | |
| 1829 | CHECK_NUMBER (arg); |
| 1830 | window = selected_window; |
| 1831 | |
| 1832 | for (i = XINT (arg); i > 0; --i) |
| 1833 | window = Fnext_window (window, Qnil, all_frames); |
| 1834 | for (; i < 0; ++i) |
| 1835 | window = Fprevious_window (window, Qnil, all_frames); |
| 1836 | |
| 1837 | Fselect_window (window, Qnil); |
| 1838 | return Qnil; |
| 1839 | } |
| 1840 | |
| 1841 | |
| 1842 | DEFUN ("window-list", Fwindow_list, Swindow_list, 0, 3, 0, |
| 1843 | doc: /* Return a list of windows on FRAME, starting with WINDOW. |
| 1844 | FRAME nil or omitted means use the selected frame. |
| 1845 | WINDOW nil or omitted means use the selected window. |
| 1846 | MINIBUF t means include the minibuffer window, even if it isn't active. |
| 1847 | MINIBUF nil or omitted means include the minibuffer window only |
| 1848 | if it's active. |
| 1849 | MINIBUF neither nil nor t means never include the minibuffer window. */) |
| 1850 | (frame, minibuf, window) |
| 1851 | Lisp_Object frame, minibuf, window; |
| 1852 | { |
| 1853 | if (NILP (window)) |
| 1854 | window = selected_window; |
| 1855 | if (NILP (frame)) |
| 1856 | frame = selected_frame; |
| 1857 | |
| 1858 | if (!EQ (frame, XWINDOW (window)->frame)) |
| 1859 | error ("Window is on a different frame"); |
| 1860 | |
| 1861 | return window_list_1 (window, minibuf, frame); |
| 1862 | } |
| 1863 | |
| 1864 | |
| 1865 | /* Return a list of windows in canonical ordering. Arguments are like |
| 1866 | for `next-window'. */ |
| 1867 | |
| 1868 | static Lisp_Object |
| 1869 | window_list_1 (window, minibuf, all_frames) |
| 1870 | Lisp_Object window, minibuf, all_frames; |
| 1871 | { |
| 1872 | Lisp_Object tail, list, rest; |
| 1873 | |
| 1874 | decode_next_window_args (&window, &minibuf, &all_frames); |
| 1875 | list = Qnil; |
| 1876 | |
| 1877 | for (tail = window_list (); CONSP (tail); tail = XCDR (tail)) |
| 1878 | if (candidate_window_p (XCAR (tail), window, minibuf, all_frames)) |
| 1879 | list = Fcons (XCAR (tail), list); |
| 1880 | |
| 1881 | /* Rotate the list to start with WINDOW. */ |
| 1882 | list = Fnreverse (list); |
| 1883 | rest = Fmemq (window, list); |
| 1884 | if (!NILP (rest) && !EQ (rest, list)) |
| 1885 | { |
| 1886 | for (tail = list; !EQ (XCDR (tail), rest); tail = XCDR (tail)) |
| 1887 | ; |
| 1888 | XSETCDR (tail, Qnil); |
| 1889 | list = nconc2 (rest, list); |
| 1890 | } |
| 1891 | return list; |
| 1892 | } |
| 1893 | |
| 1894 | |
| 1895 | \f |
| 1896 | /* Look at all windows, performing an operation specified by TYPE |
| 1897 | with argument OBJ. |
| 1898 | If FRAMES is Qt, look at all frames; |
| 1899 | Qnil, look at just the selected frame; |
| 1900 | Qvisible, look at visible frames; |
| 1901 | a frame, just look at windows on that frame. |
| 1902 | If MINI is non-zero, perform the operation on minibuffer windows too. */ |
| 1903 | |
| 1904 | enum window_loop |
| 1905 | { |
| 1906 | WINDOW_LOOP_UNUSED, |
| 1907 | GET_BUFFER_WINDOW, /* Arg is buffer */ |
| 1908 | GET_LRU_WINDOW, /* Arg is t for full-width windows only */ |
| 1909 | DELETE_OTHER_WINDOWS, /* Arg is window not to delete */ |
| 1910 | DELETE_BUFFER_WINDOWS, /* Arg is buffer */ |
| 1911 | GET_LARGEST_WINDOW, |
| 1912 | UNSHOW_BUFFER, /* Arg is buffer */ |
| 1913 | REDISPLAY_BUFFER_WINDOWS, /* Arg is buffer */ |
| 1914 | CHECK_ALL_WINDOWS |
| 1915 | }; |
| 1916 | |
| 1917 | static Lisp_Object |
| 1918 | window_loop (type, obj, mini, frames) |
| 1919 | enum window_loop type; |
| 1920 | Lisp_Object obj, frames; |
| 1921 | int mini; |
| 1922 | { |
| 1923 | Lisp_Object window, windows, best_window, frame_arg; |
| 1924 | struct frame *f; |
| 1925 | struct gcpro gcpro1; |
| 1926 | |
| 1927 | /* If we're only looping through windows on a particular frame, |
| 1928 | frame points to that frame. If we're looping through windows |
| 1929 | on all frames, frame is 0. */ |
| 1930 | if (FRAMEP (frames)) |
| 1931 | f = XFRAME (frames); |
| 1932 | else if (NILP (frames)) |
| 1933 | f = SELECTED_FRAME (); |
| 1934 | else |
| 1935 | f = NULL; |
| 1936 | |
| 1937 | if (f) |
| 1938 | frame_arg = Qlambda; |
| 1939 | else if (EQ (frames, make_number (0))) |
| 1940 | frame_arg = frames; |
| 1941 | else if (EQ (frames, Qvisible)) |
| 1942 | frame_arg = frames; |
| 1943 | else |
| 1944 | frame_arg = Qt; |
| 1945 | |
| 1946 | /* frame_arg is Qlambda to stick to one frame, |
| 1947 | Qvisible to consider all visible frames, |
| 1948 | or Qt otherwise. */ |
| 1949 | |
| 1950 | /* Pick a window to start with. */ |
| 1951 | if (WINDOWP (obj)) |
| 1952 | window = obj; |
| 1953 | else if (f) |
| 1954 | window = FRAME_SELECTED_WINDOW (f); |
| 1955 | else |
| 1956 | window = FRAME_SELECTED_WINDOW (SELECTED_FRAME ()); |
| 1957 | |
| 1958 | windows = window_list_1 (window, mini ? Qt : Qnil, frame_arg); |
| 1959 | GCPRO1 (windows); |
| 1960 | best_window = Qnil; |
| 1961 | |
| 1962 | for (; CONSP (windows); windows = CDR (windows)) |
| 1963 | { |
| 1964 | struct window *w; |
| 1965 | |
| 1966 | window = XCAR (windows); |
| 1967 | w = XWINDOW (window); |
| 1968 | |
| 1969 | /* Note that we do not pay attention here to whether the frame |
| 1970 | is visible, since Fwindow_list skips non-visible frames if |
| 1971 | that is desired, under the control of frame_arg. */ |
| 1972 | if (!MINI_WINDOW_P (w) |
| 1973 | /* For UNSHOW_BUFFER, we must always consider all windows. */ |
| 1974 | || type == UNSHOW_BUFFER |
| 1975 | || (mini && minibuf_level > 0)) |
| 1976 | switch (type) |
| 1977 | { |
| 1978 | case GET_BUFFER_WINDOW: |
| 1979 | if (EQ (w->buffer, obj) |
| 1980 | /* Don't find any minibuffer window |
| 1981 | except the one that is currently in use. */ |
| 1982 | && (MINI_WINDOW_P (w) |
| 1983 | ? EQ (window, minibuf_window) |
| 1984 | : 1)) |
| 1985 | { |
| 1986 | if (NILP (best_window)) |
| 1987 | best_window = window; |
| 1988 | else if (EQ (window, selected_window)) |
| 1989 | /* For compatibility with 20.x, prefer to return |
| 1990 | selected-window. */ |
| 1991 | best_window = window; |
| 1992 | } |
| 1993 | break; |
| 1994 | |
| 1995 | case GET_LRU_WINDOW: |
| 1996 | /* t as arg means consider only full-width windows */ |
| 1997 | if (!NILP (obj) && !WINDOW_FULL_WIDTH_P (w)) |
| 1998 | break; |
| 1999 | /* Ignore dedicated windows and minibuffers. */ |
| 2000 | if (MINI_WINDOW_P (w) || EQ (w->dedicated, Qt)) |
| 2001 | break; |
| 2002 | if (NILP (best_window) |
| 2003 | || (XFASTINT (XWINDOW (best_window)->use_time) |
| 2004 | > XFASTINT (w->use_time))) |
| 2005 | best_window = window; |
| 2006 | break; |
| 2007 | |
| 2008 | case DELETE_OTHER_WINDOWS: |
| 2009 | if (!EQ (window, obj)) |
| 2010 | Fdelete_window (window); |
| 2011 | break; |
| 2012 | |
| 2013 | case DELETE_BUFFER_WINDOWS: |
| 2014 | if (EQ (w->buffer, obj)) |
| 2015 | { |
| 2016 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 2017 | |
| 2018 | /* If this window is dedicated, and in a frame of its own, |
| 2019 | kill the frame. */ |
| 2020 | if (EQ (window, FRAME_ROOT_WINDOW (f)) |
| 2021 | && !NILP (w->dedicated) |
| 2022 | && other_visible_frames (f)) |
| 2023 | { |
| 2024 | /* Skip the other windows on this frame. |
| 2025 | There might be one, the minibuffer! */ |
| 2026 | while (CONSP (XCDR (windows)) |
| 2027 | && EQ (XWINDOW (XCAR (windows))->frame, |
| 2028 | XWINDOW (XCAR (XCDR (windows)))->frame)) |
| 2029 | windows = XCDR (windows); |
| 2030 | |
| 2031 | /* Now we can safely delete the frame. */ |
| 2032 | Fdelete_frame (w->frame, Qnil); |
| 2033 | } |
| 2034 | else if (NILP (w->parent)) |
| 2035 | { |
| 2036 | /* If we're deleting the buffer displayed in the |
| 2037 | only window on the frame, find a new buffer to |
| 2038 | display there. */ |
| 2039 | Lisp_Object buffer; |
| 2040 | buffer = Fother_buffer (obj, Qnil, w->frame); |
| 2041 | Fset_window_buffer (window, buffer, Qnil); |
| 2042 | if (EQ (window, selected_window)) |
| 2043 | Fset_buffer (w->buffer); |
| 2044 | } |
| 2045 | else |
| 2046 | Fdelete_window (window); |
| 2047 | } |
| 2048 | break; |
| 2049 | |
| 2050 | case GET_LARGEST_WINDOW: |
| 2051 | { |
| 2052 | /* Ignore dedicated windows and minibuffers. */ |
| 2053 | if (MINI_WINDOW_P (w) || EQ (w->dedicated, Qt)) |
| 2054 | break; |
| 2055 | |
| 2056 | if (NILP (best_window)) |
| 2057 | best_window = window; |
| 2058 | else |
| 2059 | { |
| 2060 | struct window *b = XWINDOW (best_window); |
| 2061 | if (XFASTINT (w->total_lines) * XFASTINT (w->total_cols) |
| 2062 | > XFASTINT (b->total_lines) * XFASTINT (b->total_cols)) |
| 2063 | best_window = window; |
| 2064 | } |
| 2065 | } |
| 2066 | break; |
| 2067 | |
| 2068 | case UNSHOW_BUFFER: |
| 2069 | if (EQ (w->buffer, obj)) |
| 2070 | { |
| 2071 | Lisp_Object buffer; |
| 2072 | struct frame *f = XFRAME (w->frame); |
| 2073 | |
| 2074 | /* Find another buffer to show in this window. */ |
| 2075 | buffer = Fother_buffer (obj, Qnil, w->frame); |
| 2076 | |
| 2077 | /* If this window is dedicated, and in a frame of its own, |
| 2078 | kill the frame. */ |
| 2079 | if (EQ (window, FRAME_ROOT_WINDOW (f)) |
| 2080 | && !NILP (w->dedicated) |
| 2081 | && other_visible_frames (f)) |
| 2082 | { |
| 2083 | /* Skip the other windows on this frame. |
| 2084 | There might be one, the minibuffer! */ |
| 2085 | while (CONSP (XCDR (windows)) |
| 2086 | && EQ (XWINDOW (XCAR (windows))->frame, |
| 2087 | XWINDOW (XCAR (XCDR (windows)))->frame)) |
| 2088 | windows = XCDR (windows); |
| 2089 | |
| 2090 | /* Now we can safely delete the frame. */ |
| 2091 | Fdelete_frame (w->frame, Qnil); |
| 2092 | } |
| 2093 | else if (!NILP (w->dedicated) && !NILP (w->parent)) |
| 2094 | { |
| 2095 | Lisp_Object window; |
| 2096 | XSETWINDOW (window, w); |
| 2097 | /* If this window is dedicated and not the only window |
| 2098 | in its frame, then kill it. */ |
| 2099 | Fdelete_window (window); |
| 2100 | } |
| 2101 | else |
| 2102 | { |
| 2103 | /* Otherwise show a different buffer in the window. */ |
| 2104 | w->dedicated = Qnil; |
| 2105 | Fset_window_buffer (window, buffer, Qnil); |
| 2106 | if (EQ (window, selected_window)) |
| 2107 | Fset_buffer (w->buffer); |
| 2108 | } |
| 2109 | } |
| 2110 | break; |
| 2111 | |
| 2112 | case REDISPLAY_BUFFER_WINDOWS: |
| 2113 | if (EQ (w->buffer, obj)) |
| 2114 | { |
| 2115 | mark_window_display_accurate (window, 0); |
| 2116 | w->update_mode_line = Qt; |
| 2117 | XBUFFER (obj)->prevent_redisplay_optimizations_p = 1; |
| 2118 | ++update_mode_lines; |
| 2119 | best_window = window; |
| 2120 | } |
| 2121 | break; |
| 2122 | |
| 2123 | /* Check for a window that has a killed buffer. */ |
| 2124 | case CHECK_ALL_WINDOWS: |
| 2125 | if (! NILP (w->buffer) |
| 2126 | && NILP (XBUFFER (w->buffer)->name)) |
| 2127 | abort (); |
| 2128 | break; |
| 2129 | |
| 2130 | case WINDOW_LOOP_UNUSED: |
| 2131 | break; |
| 2132 | } |
| 2133 | } |
| 2134 | |
| 2135 | UNGCPRO; |
| 2136 | return best_window; |
| 2137 | } |
| 2138 | |
| 2139 | /* Used for debugging. Abort if any window has a dead buffer. */ |
| 2140 | |
| 2141 | void |
| 2142 | check_all_windows () |
| 2143 | { |
| 2144 | window_loop (CHECK_ALL_WINDOWS, Qnil, 1, Qt); |
| 2145 | } |
| 2146 | |
| 2147 | DEFUN ("get-lru-window", Fget_lru_window, Sget_lru_window, 0, 1, 0, |
| 2148 | doc: /* Return the window least recently selected or used for display. |
| 2149 | Return a full-width window if possible. |
| 2150 | A minibuffer window is never a candidate. |
| 2151 | A dedicated window is never a candidate, so if all windows are dedicated, |
| 2152 | the value is nil. |
| 2153 | If optional argument FRAME is `visible', search all visible frames. |
| 2154 | If FRAME is 0, search all visible and iconified frames. |
| 2155 | If FRAME is t, search all frames. |
| 2156 | If FRAME is nil, search only the selected frame. |
| 2157 | If FRAME is a frame, search only that frame. */) |
| 2158 | (frame) |
| 2159 | Lisp_Object frame; |
| 2160 | { |
| 2161 | register Lisp_Object w; |
| 2162 | /* First try for a window that is full-width */ |
| 2163 | w = window_loop (GET_LRU_WINDOW, Qt, 0, frame); |
| 2164 | if (!NILP (w) && !EQ (w, selected_window)) |
| 2165 | return w; |
| 2166 | /* If none of them, try the rest */ |
| 2167 | return window_loop (GET_LRU_WINDOW, Qnil, 0, frame); |
| 2168 | } |
| 2169 | |
| 2170 | DEFUN ("get-largest-window", Fget_largest_window, Sget_largest_window, 0, 1, 0, |
| 2171 | doc: /* Return the largest window in area. |
| 2172 | A minibuffer window is never a candidate. |
| 2173 | A dedicated window is never a candidate, so if all windows are dedicated, |
| 2174 | the value is nil. |
| 2175 | If optional argument FRAME is `visible', search all visible frames. |
| 2176 | If FRAME is 0, search all visible and iconified frames. |
| 2177 | If FRAME is t, search all frames. |
| 2178 | If FRAME is nil, search only the selected frame. |
| 2179 | If FRAME is a frame, search only that frame. */) |
| 2180 | (frame) |
| 2181 | Lisp_Object frame; |
| 2182 | { |
| 2183 | return window_loop (GET_LARGEST_WINDOW, Qnil, 0, |
| 2184 | frame); |
| 2185 | } |
| 2186 | |
| 2187 | DEFUN ("get-buffer-window", Fget_buffer_window, Sget_buffer_window, 1, 2, 0, |
| 2188 | doc: /* Return a window currently displaying BUFFER, or nil if none. |
| 2189 | BUFFER can be a buffer or a buffer name. |
| 2190 | If optional argument FRAME is `visible', search all visible frames. |
| 2191 | If optional argument FRAME is 0, search all visible and iconified frames. |
| 2192 | If FRAME is t, search all frames. |
| 2193 | If FRAME is nil, search only the selected frame. |
| 2194 | If FRAME is a frame, search only that frame. */) |
| 2195 | (buffer, frame) |
| 2196 | Lisp_Object buffer, frame; |
| 2197 | { |
| 2198 | buffer = Fget_buffer (buffer); |
| 2199 | if (BUFFERP (buffer)) |
| 2200 | return window_loop (GET_BUFFER_WINDOW, buffer, 1, frame); |
| 2201 | else |
| 2202 | return Qnil; |
| 2203 | } |
| 2204 | |
| 2205 | DEFUN ("delete-other-windows", Fdelete_other_windows, Sdelete_other_windows, |
| 2206 | 0, 1, "", |
| 2207 | doc: /* Make WINDOW (or the selected window) fill its frame. |
| 2208 | Only the frame WINDOW is on is affected. |
| 2209 | This function tries to reduce display jumps |
| 2210 | by keeping the text previously visible in WINDOW |
| 2211 | in the same place on the frame. Doing this depends on |
| 2212 | the value of (window-start WINDOW), so if calling this function |
| 2213 | in a program gives strange scrolling, make sure the window-start |
| 2214 | value is reasonable when this function is called. */) |
| 2215 | (window) |
| 2216 | Lisp_Object window; |
| 2217 | { |
| 2218 | struct window *w; |
| 2219 | int startpos; |
| 2220 | int top, new_top; |
| 2221 | |
| 2222 | if (NILP (window)) |
| 2223 | window = selected_window; |
| 2224 | else |
| 2225 | CHECK_LIVE_WINDOW (window); |
| 2226 | w = XWINDOW (window); |
| 2227 | |
| 2228 | startpos = marker_position (w->start); |
| 2229 | top = WINDOW_TOP_EDGE_LINE (w) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
| 2230 | |
| 2231 | if (MINI_WINDOW_P (w) && top > 0) |
| 2232 | error ("Can't expand minibuffer to full frame"); |
| 2233 | |
| 2234 | window_loop (DELETE_OTHER_WINDOWS, window, 0, WINDOW_FRAME (w)); |
| 2235 | |
| 2236 | /* Try to minimize scrolling, by setting the window start to the point |
| 2237 | will cause the text at the old window start to be at the same place |
| 2238 | on the frame. But don't try to do this if the window start is |
| 2239 | outside the visible portion (as might happen when the display is |
| 2240 | not current, due to typeahead). */ |
| 2241 | new_top = WINDOW_TOP_EDGE_LINE (w) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
| 2242 | if (new_top != top |
| 2243 | && startpos >= BUF_BEGV (XBUFFER (w->buffer)) |
| 2244 | && startpos <= BUF_ZV (XBUFFER (w->buffer))) |
| 2245 | { |
| 2246 | struct position pos; |
| 2247 | struct buffer *obuf = current_buffer; |
| 2248 | |
| 2249 | Fset_buffer (w->buffer); |
| 2250 | /* This computation used to temporarily move point, but that can |
| 2251 | have unwanted side effects due to text properties. */ |
| 2252 | pos = *vmotion (startpos, -top, w); |
| 2253 | |
| 2254 | set_marker_both (w->start, w->buffer, pos.bufpos, pos.bytepos); |
| 2255 | w->window_end_valid = Qnil; |
| 2256 | w->start_at_line_beg = ((pos.bytepos == BEGV_BYTE |
| 2257 | || FETCH_BYTE (pos.bytepos - 1) == '\n') ? Qt |
| 2258 | : Qnil); |
| 2259 | /* We need to do this, so that the window-scroll-functions |
| 2260 | get called. */ |
| 2261 | w->optional_new_start = Qt; |
| 2262 | |
| 2263 | set_buffer_internal (obuf); |
| 2264 | } |
| 2265 | |
| 2266 | return Qnil; |
| 2267 | } |
| 2268 | |
| 2269 | DEFUN ("delete-windows-on", Fdelete_windows_on, Sdelete_windows_on, |
| 2270 | 1, 2, "bDelete windows on (buffer): ", |
| 2271 | doc: /* Delete all windows showing BUFFER. |
| 2272 | BUFFER must be a buffer or the name of an existing buffer. |
| 2273 | Optional second argument FRAME controls which frames are affected. |
| 2274 | If optional argument FRAME is `visible', search all visible frames. |
| 2275 | If FRAME is 0, search all visible and iconified frames. |
| 2276 | If FRAME is nil, search all frames. |
| 2277 | If FRAME is t, search only the selected frame. |
| 2278 | If FRAME is a frame, search only that frame. */) |
| 2279 | (buffer, frame) |
| 2280 | Lisp_Object buffer, frame; |
| 2281 | { |
| 2282 | /* FRAME uses t and nil to mean the opposite of what window_loop |
| 2283 | expects. */ |
| 2284 | if (NILP (frame)) |
| 2285 | frame = Qt; |
| 2286 | else if (EQ (frame, Qt)) |
| 2287 | frame = Qnil; |
| 2288 | |
| 2289 | if (!NILP (buffer)) |
| 2290 | { |
| 2291 | buffer = Fget_buffer (buffer); |
| 2292 | CHECK_BUFFER (buffer); |
| 2293 | window_loop (DELETE_BUFFER_WINDOWS, buffer, 0, frame); |
| 2294 | } |
| 2295 | |
| 2296 | return Qnil; |
| 2297 | } |
| 2298 | |
| 2299 | DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows, |
| 2300 | Sreplace_buffer_in_windows, |
| 2301 | 1, 1, "bReplace buffer in windows: ", |
| 2302 | doc: /* Replace BUFFER with some other buffer in all windows showing it. |
| 2303 | BUFFER may be a buffer or the name of an existing buffer. */) |
| 2304 | (buffer) |
| 2305 | Lisp_Object buffer; |
| 2306 | { |
| 2307 | if (!NILP (buffer)) |
| 2308 | { |
| 2309 | buffer = Fget_buffer (buffer); |
| 2310 | CHECK_BUFFER (buffer); |
| 2311 | window_loop (UNSHOW_BUFFER, buffer, 0, Qt); |
| 2312 | } |
| 2313 | return Qnil; |
| 2314 | } |
| 2315 | |
| 2316 | /* Replace BUFFER with some other buffer in all windows |
| 2317 | of all frames, even those on other keyboards. */ |
| 2318 | |
| 2319 | void |
| 2320 | replace_buffer_in_all_windows (buffer) |
| 2321 | Lisp_Object buffer; |
| 2322 | { |
| 2323 | #ifdef MULTI_KBOARD |
| 2324 | Lisp_Object tail, frame; |
| 2325 | |
| 2326 | /* A single call to window_loop won't do the job |
| 2327 | because it only considers frames on the current keyboard. |
| 2328 | So loop manually over frames, and handle each one. */ |
| 2329 | FOR_EACH_FRAME (tail, frame) |
| 2330 | window_loop (UNSHOW_BUFFER, buffer, 1, frame); |
| 2331 | #else |
| 2332 | window_loop (UNSHOW_BUFFER, buffer, 1, Qt); |
| 2333 | #endif |
| 2334 | } |
| 2335 | \f |
| 2336 | /* Set the height of WINDOW and all its inferiors. */ |
| 2337 | |
| 2338 | /* The smallest acceptable dimensions for a window. Anything smaller |
| 2339 | might crash Emacs. */ |
| 2340 | |
| 2341 | #define MIN_SAFE_WINDOW_WIDTH (2) |
| 2342 | #define MIN_SAFE_WINDOW_HEIGHT (1) |
| 2343 | |
| 2344 | /* Make sure that window_min_height and window_min_width are |
| 2345 | not too small; if they are, set them to safe minima. */ |
| 2346 | |
| 2347 | static void |
| 2348 | check_min_window_sizes () |
| 2349 | { |
| 2350 | /* Smaller values might permit a crash. */ |
| 2351 | if (window_min_width < MIN_SAFE_WINDOW_WIDTH) |
| 2352 | window_min_width = MIN_SAFE_WINDOW_WIDTH; |
| 2353 | if (window_min_height < MIN_SAFE_WINDOW_HEIGHT) |
| 2354 | window_min_height = MIN_SAFE_WINDOW_HEIGHT; |
| 2355 | } |
| 2356 | |
| 2357 | /* If *ROWS or *COLS are too small a size for FRAME, set them to the |
| 2358 | minimum allowable size. */ |
| 2359 | |
| 2360 | void |
| 2361 | check_frame_size (frame, rows, cols) |
| 2362 | FRAME_PTR frame; |
| 2363 | int *rows, *cols; |
| 2364 | { |
| 2365 | /* For height, we have to see: |
| 2366 | how many windows the frame has at minimum (one or two), |
| 2367 | and whether it has a menu bar or other special stuff at the top. */ |
| 2368 | int min_height |
| 2369 | = ((FRAME_MINIBUF_ONLY_P (frame) || ! FRAME_HAS_MINIBUF_P (frame)) |
| 2370 | ? MIN_SAFE_WINDOW_HEIGHT |
| 2371 | : 2 * MIN_SAFE_WINDOW_HEIGHT); |
| 2372 | |
| 2373 | if (FRAME_TOP_MARGIN (frame) > 0) |
| 2374 | min_height += FRAME_TOP_MARGIN (frame); |
| 2375 | |
| 2376 | if (*rows < min_height) |
| 2377 | *rows = min_height; |
| 2378 | if (*cols < MIN_SAFE_WINDOW_WIDTH) |
| 2379 | *cols = MIN_SAFE_WINDOW_WIDTH; |
| 2380 | } |
| 2381 | |
| 2382 | |
| 2383 | /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means |
| 2384 | check if W's width can be changed, otherwise check W's height. |
| 2385 | CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's |
| 2386 | siblings, too. If none of the siblings is resizable, WINDOW isn't |
| 2387 | either. */ |
| 2388 | |
| 2389 | static int |
| 2390 | window_fixed_size_p (w, width_p, check_siblings_p) |
| 2391 | struct window *w; |
| 2392 | int width_p, check_siblings_p; |
| 2393 | { |
| 2394 | int fixed_p; |
| 2395 | struct window *c; |
| 2396 | |
| 2397 | if (!NILP (w->hchild)) |
| 2398 | { |
| 2399 | c = XWINDOW (w->hchild); |
| 2400 | |
| 2401 | if (width_p) |
| 2402 | { |
| 2403 | /* A horiz. combination is fixed-width if all of if its |
| 2404 | children are. */ |
| 2405 | while (c && window_fixed_size_p (c, width_p, 0)) |
| 2406 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2407 | fixed_p = c == NULL; |
| 2408 | } |
| 2409 | else |
| 2410 | { |
| 2411 | /* A horiz. combination is fixed-height if one of if its |
| 2412 | children is. */ |
| 2413 | while (c && !window_fixed_size_p (c, width_p, 0)) |
| 2414 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2415 | fixed_p = c != NULL; |
| 2416 | } |
| 2417 | } |
| 2418 | else if (!NILP (w->vchild)) |
| 2419 | { |
| 2420 | c = XWINDOW (w->vchild); |
| 2421 | |
| 2422 | if (width_p) |
| 2423 | { |
| 2424 | /* A vert. combination is fixed-width if one of if its |
| 2425 | children is. */ |
| 2426 | while (c && !window_fixed_size_p (c, width_p, 0)) |
| 2427 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2428 | fixed_p = c != NULL; |
| 2429 | } |
| 2430 | else |
| 2431 | { |
| 2432 | /* A vert. combination is fixed-height if all of if its |
| 2433 | children are. */ |
| 2434 | while (c && window_fixed_size_p (c, width_p, 0)) |
| 2435 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2436 | fixed_p = c == NULL; |
| 2437 | } |
| 2438 | } |
| 2439 | else if (BUFFERP (w->buffer)) |
| 2440 | { |
| 2441 | if (w->height_fixed_p && !width_p) |
| 2442 | fixed_p = 1; |
| 2443 | else |
| 2444 | { |
| 2445 | struct buffer *old = current_buffer; |
| 2446 | Lisp_Object val; |
| 2447 | |
| 2448 | current_buffer = XBUFFER (w->buffer); |
| 2449 | val = find_symbol_value (Qwindow_size_fixed); |
| 2450 | current_buffer = old; |
| 2451 | |
| 2452 | fixed_p = 0; |
| 2453 | if (!EQ (val, Qunbound)) |
| 2454 | { |
| 2455 | fixed_p = !NILP (val); |
| 2456 | |
| 2457 | if (fixed_p |
| 2458 | && ((EQ (val, Qheight) && width_p) |
| 2459 | || (EQ (val, Qwidth) && !width_p))) |
| 2460 | fixed_p = 0; |
| 2461 | } |
| 2462 | } |
| 2463 | |
| 2464 | /* Can't tell if this one is resizable without looking at |
| 2465 | siblings. If all siblings are fixed-size this one is too. */ |
| 2466 | if (!fixed_p && check_siblings_p && WINDOWP (w->parent)) |
| 2467 | { |
| 2468 | Lisp_Object child; |
| 2469 | |
| 2470 | for (child = w->prev; !NILP (child); child = XWINDOW (child)->prev) |
| 2471 | if (!window_fixed_size_p (XWINDOW (child), width_p, 0)) |
| 2472 | break; |
| 2473 | |
| 2474 | if (NILP (child)) |
| 2475 | for (child = w->next; !NILP (child); child = XWINDOW (child)->next) |
| 2476 | if (!window_fixed_size_p (XWINDOW (child), width_p, 0)) |
| 2477 | break; |
| 2478 | |
| 2479 | if (NILP (child)) |
| 2480 | fixed_p = 1; |
| 2481 | } |
| 2482 | } |
| 2483 | else |
| 2484 | fixed_p = 1; |
| 2485 | |
| 2486 | return fixed_p; |
| 2487 | } |
| 2488 | |
| 2489 | |
| 2490 | /* Return the minimum size of window W, not taking fixed-width windows |
| 2491 | into account. WIDTH_P non-zero means return the minimum width, |
| 2492 | otherwise return the minimum height. If W is a combination window, |
| 2493 | compute the minimum size from the minimum sizes of W's children. */ |
| 2494 | |
| 2495 | static int |
| 2496 | window_min_size_1 (w, width_p) |
| 2497 | struct window *w; |
| 2498 | int width_p; |
| 2499 | { |
| 2500 | struct window *c; |
| 2501 | int size; |
| 2502 | |
| 2503 | if (!NILP (w->hchild)) |
| 2504 | { |
| 2505 | c = XWINDOW (w->hchild); |
| 2506 | size = 0; |
| 2507 | |
| 2508 | if (width_p) |
| 2509 | { |
| 2510 | /* The min width of a horizontal combination is |
| 2511 | the sum of the min widths of its children. */ |
| 2512 | while (c) |
| 2513 | { |
| 2514 | size += window_min_size_1 (c, width_p); |
| 2515 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2516 | } |
| 2517 | } |
| 2518 | else |
| 2519 | { |
| 2520 | /* The min height a horizontal combination equals |
| 2521 | the maximum of all min height of its children. */ |
| 2522 | while (c) |
| 2523 | { |
| 2524 | int min_size = window_min_size_1 (c, width_p); |
| 2525 | size = max (min_size, size); |
| 2526 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2527 | } |
| 2528 | } |
| 2529 | } |
| 2530 | else if (!NILP (w->vchild)) |
| 2531 | { |
| 2532 | c = XWINDOW (w->vchild); |
| 2533 | size = 0; |
| 2534 | |
| 2535 | if (width_p) |
| 2536 | { |
| 2537 | /* The min width of a vertical combination is |
| 2538 | the maximum of the min widths of its children. */ |
| 2539 | while (c) |
| 2540 | { |
| 2541 | int min_size = window_min_size_1 (c, width_p); |
| 2542 | size = max (min_size, size); |
| 2543 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2544 | } |
| 2545 | } |
| 2546 | else |
| 2547 | { |
| 2548 | /* The min height of a vertical combination equals |
| 2549 | the sum of the min height of its children. */ |
| 2550 | while (c) |
| 2551 | { |
| 2552 | size += window_min_size_1 (c, width_p); |
| 2553 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; |
| 2554 | } |
| 2555 | } |
| 2556 | } |
| 2557 | else |
| 2558 | { |
| 2559 | if (width_p) |
| 2560 | size = window_min_width; |
| 2561 | else |
| 2562 | { |
| 2563 | if (MINI_WINDOW_P (w) |
| 2564 | || (!WINDOW_WANTS_MODELINE_P (w) |
| 2565 | && !WINDOW_WANTS_HEADER_LINE_P (w))) |
| 2566 | size = 1; |
| 2567 | else |
| 2568 | size = window_min_height; |
| 2569 | } |
| 2570 | } |
| 2571 | |
| 2572 | return size; |
| 2573 | } |
| 2574 | |
| 2575 | |
| 2576 | /* Return the minimum size of window W, taking fixed-size windows into |
| 2577 | account. WIDTH_P non-zero means return the minimum width, |
| 2578 | otherwise return the minimum height. IGNORE_FIXED_P non-zero means |
| 2579 | ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size |
| 2580 | unless FIXED is null. */ |
| 2581 | |
| 2582 | static int |
| 2583 | window_min_size (w, width_p, ignore_fixed_p, fixed) |
| 2584 | struct window *w; |
| 2585 | int width_p, ignore_fixed_p, *fixed; |
| 2586 | { |
| 2587 | int size, fixed_p; |
| 2588 | |
| 2589 | if (ignore_fixed_p) |
| 2590 | fixed_p = 0; |
| 2591 | else |
| 2592 | fixed_p = window_fixed_size_p (w, width_p, 1); |
| 2593 | |
| 2594 | if (fixed) |
| 2595 | *fixed = fixed_p; |
| 2596 | |
| 2597 | if (fixed_p) |
| 2598 | size = width_p ? XFASTINT (w->total_cols) : XFASTINT (w->total_lines); |
| 2599 | else |
| 2600 | size = window_min_size_1 (w, width_p); |
| 2601 | |
| 2602 | return size; |
| 2603 | } |
| 2604 | |
| 2605 | |
| 2606 | /* Adjust the margins of window W if text area is too small. |
| 2607 | Return 1 if window width is ok after adjustment; 0 if window |
| 2608 | is still too narrow. */ |
| 2609 | |
| 2610 | static int |
| 2611 | adjust_window_margins (w) |
| 2612 | struct window *w; |
| 2613 | { |
| 2614 | int box_cols = (WINDOW_TOTAL_COLS (w) |
| 2615 | - WINDOW_FRINGE_COLS (w) |
| 2616 | - WINDOW_SCROLL_BAR_COLS (w)); |
| 2617 | int margin_cols = (WINDOW_LEFT_MARGIN_COLS (w) |
| 2618 | + WINDOW_RIGHT_MARGIN_COLS (w)); |
| 2619 | |
| 2620 | if (box_cols - margin_cols >= MIN_SAFE_WINDOW_WIDTH) |
| 2621 | return 1; |
| 2622 | |
| 2623 | if (margin_cols < 0 || box_cols < MIN_SAFE_WINDOW_WIDTH) |
| 2624 | return 0; |
| 2625 | |
| 2626 | /* Window's text area is too narrow, but reducing the window |
| 2627 | margins will fix that. */ |
| 2628 | margin_cols = box_cols - MIN_SAFE_WINDOW_WIDTH; |
| 2629 | if (WINDOW_RIGHT_MARGIN_COLS (w) > 0) |
| 2630 | { |
| 2631 | if (WINDOW_LEFT_MARGIN_COLS (w) > 0) |
| 2632 | w->left_margin_cols = w->right_margin_cols |
| 2633 | = make_number (margin_cols/2); |
| 2634 | else |
| 2635 | w->right_margin_cols = make_number (margin_cols); |
| 2636 | } |
| 2637 | else |
| 2638 | w->left_margin_cols = make_number (margin_cols); |
| 2639 | return 1; |
| 2640 | } |
| 2641 | |
| 2642 | /* Calculate new sizes for windows in the list FORWARD when the window size |
| 2643 | goes from TOTAL to SIZE. TOTAL must be greater than SIZE. |
| 2644 | The number of windows in FORWARD is NCHILDREN, and the number that |
| 2645 | can shrink is SHRINKABLE. |
| 2646 | The minimum size a window can have is MIN_SIZE. |
| 2647 | If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero. |
| 2648 | If we are shrinking columns, WIDTH_P is non-zero, otherwise we are |
| 2649 | shrinking rows. |
| 2650 | |
| 2651 | This function returns an allocated array of new sizes that the caller |
| 2652 | must free. The size -1 means the window is fixed and RESIZE_FIXED_P |
| 2653 | is zero. Array index 0 refers to the first window in FORWARD, 1 to |
| 2654 | the second, and so on. |
| 2655 | |
| 2656 | This function tries to keep windows at least at the minimum size |
| 2657 | and resize other windows before it resizes any window to zero (i.e. |
| 2658 | delete that window). |
| 2659 | |
| 2660 | Windows are resized proportional to their size, so bigger windows |
| 2661 | shrink more than smaller windows. */ |
| 2662 | static int * |
| 2663 | shrink_windows (total, size, nchildren, shrinkable, |
| 2664 | min_size, resize_fixed_p, forward, width_p) |
| 2665 | int total, size, nchildren, shrinkable, min_size; |
| 2666 | int resize_fixed_p, width_p; |
| 2667 | Lisp_Object forward; |
| 2668 | { |
| 2669 | int available_resize = 0; |
| 2670 | int *new_sizes; |
| 2671 | struct window *c; |
| 2672 | Lisp_Object child; |
| 2673 | int smallest = total; |
| 2674 | int total_removed = 0; |
| 2675 | int total_shrink = total - size; |
| 2676 | int i; |
| 2677 | |
| 2678 | new_sizes = xmalloc (sizeof (*new_sizes) * nchildren); |
| 2679 | |
| 2680 | for (i = 0, child = forward; !NILP (child); child = c->next, ++i) |
| 2681 | { |
| 2682 | int child_size; |
| 2683 | |
| 2684 | c = XWINDOW (child); |
| 2685 | child_size = width_p ? XINT (c->total_cols) : XINT (c->total_lines); |
| 2686 | |
| 2687 | if (! resize_fixed_p && window_fixed_size_p (c, width_p, 0)) |
| 2688 | new_sizes[i] = -1; |
| 2689 | else |
| 2690 | { |
| 2691 | new_sizes[i] = child_size; |
| 2692 | if (child_size > min_size) |
| 2693 | available_resize += child_size - min_size; |
| 2694 | } |
| 2695 | } |
| 2696 | /* We might need to shrink some windows to zero. Find the smallest |
| 2697 | windows and set them to 0 until we can fulfil the new size. */ |
| 2698 | |
| 2699 | while (shrinkable > 1 && size + available_resize < total) |
| 2700 | { |
| 2701 | for (i = 0; i < nchildren; ++i) |
| 2702 | if (new_sizes[i] > 0 && smallest > new_sizes[i]) |
| 2703 | smallest = new_sizes[i]; |
| 2704 | |
| 2705 | for (i = 0; i < nchildren; ++i) |
| 2706 | if (new_sizes[i] == smallest) |
| 2707 | { |
| 2708 | /* Resize this window down to zero. */ |
| 2709 | new_sizes[i] = 0; |
| 2710 | if (smallest > min_size) |
| 2711 | available_resize -= smallest - min_size; |
| 2712 | available_resize += smallest; |
| 2713 | --shrinkable; |
| 2714 | total_removed += smallest; |
| 2715 | |
| 2716 | /* We don't know what the smallest is now. */ |
| 2717 | smallest = total; |
| 2718 | |
| 2719 | /* Out of for, just remove one window at the time and |
| 2720 | check again if we have enough space. */ |
| 2721 | break; |
| 2722 | } |
| 2723 | } |
| 2724 | |
| 2725 | /* Now, calculate the new sizes. Try to shrink each window |
| 2726 | proportional to its size. */ |
| 2727 | for (i = 0; i < nchildren; ++i) |
| 2728 | { |
| 2729 | if (new_sizes[i] > min_size) |
| 2730 | { |
| 2731 | int to_shrink = total_shrink*new_sizes[i]/total; |
| 2732 | if (new_sizes[i] - to_shrink < min_size) |
| 2733 | to_shrink = new_sizes[i] - min_size; |
| 2734 | new_sizes[i] -= to_shrink; |
| 2735 | total_removed += to_shrink; |
| 2736 | } |
| 2737 | } |
| 2738 | |
| 2739 | /* Any reminder due to rounding, we just subtract from windows |
| 2740 | that are left and still can be shrunk. */ |
| 2741 | while (total_shrink > total_removed) |
| 2742 | { |
| 2743 | int nonzero_sizes = 0; |
| 2744 | int nonzero_idx = -1; |
| 2745 | |
| 2746 | for (i = 0; i < nchildren; ++i) |
| 2747 | if (new_sizes[i] > 0) |
| 2748 | { |
| 2749 | ++nonzero_sizes; |
| 2750 | nonzero_idx = i; |
| 2751 | } |
| 2752 | |
| 2753 | for (i = 0; i < nchildren; ++i) |
| 2754 | if (new_sizes[i] > min_size) |
| 2755 | { |
| 2756 | --new_sizes[i]; |
| 2757 | ++total_removed; |
| 2758 | |
| 2759 | /* Out of for, just shrink one window at the time and |
| 2760 | check again if we have enough space. */ |
| 2761 | break; |
| 2762 | } |
| 2763 | |
| 2764 | |
| 2765 | /* Special case, only one window left. */ |
| 2766 | if (nonzero_sizes == 1) |
| 2767 | break; |
| 2768 | } |
| 2769 | |
| 2770 | /* Any surplus due to rounding, we add to windows that are left. */ |
| 2771 | while (total_shrink < total_removed) |
| 2772 | { |
| 2773 | for (i = 0; i < nchildren; ++i) |
| 2774 | { |
| 2775 | if (new_sizes[i] != 0 && total_shrink < total_removed) |
| 2776 | { |
| 2777 | ++new_sizes[i]; |
| 2778 | --total_removed; |
| 2779 | break; |
| 2780 | } |
| 2781 | } |
| 2782 | } |
| 2783 | |
| 2784 | return new_sizes; |
| 2785 | } |
| 2786 | |
| 2787 | /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set |
| 2788 | WINDOW's width. Resize WINDOW's children, if any, so that they |
| 2789 | keep their proportionate size relative to WINDOW. Propagate |
| 2790 | WINDOW's top or left edge position to children. Delete windows |
| 2791 | that become too small unless NODELETE_P is non-zero. |
| 2792 | |
| 2793 | If NODELETE_P is 2, that means we do delete windows that are |
| 2794 | too small, even if they were too small before! */ |
| 2795 | |
| 2796 | static void |
| 2797 | size_window (window, size, width_p, nodelete_p) |
| 2798 | Lisp_Object window; |
| 2799 | int size, width_p, nodelete_p; |
| 2800 | { |
| 2801 | struct window *w = XWINDOW (window); |
| 2802 | struct window *c; |
| 2803 | Lisp_Object child, *forward, *sideward; |
| 2804 | int old_size, min_size, safe_min_size; |
| 2805 | |
| 2806 | /* We test nodelete_p != 2 and nodelete_p != 1 below, so it |
| 2807 | seems like it's too soon to do this here. ++KFS. */ |
| 2808 | if (nodelete_p == 2) |
| 2809 | nodelete_p = 0; |
| 2810 | |
| 2811 | check_min_window_sizes (); |
| 2812 | size = max (0, size); |
| 2813 | |
| 2814 | /* If the window has been "too small" at one point, |
| 2815 | don't delete it for being "too small" in the future. |
| 2816 | Preserve it as long as that is at all possible. */ |
| 2817 | if (width_p) |
| 2818 | { |
| 2819 | old_size = WINDOW_TOTAL_COLS (w); |
| 2820 | min_size = window_min_width; |
| 2821 | /* Ensure that there is room for the scroll bar and fringes! |
| 2822 | We may reduce display margins though. */ |
| 2823 | safe_min_size = (MIN_SAFE_WINDOW_WIDTH |
| 2824 | + WINDOW_FRINGE_COLS (w) |
| 2825 | + WINDOW_SCROLL_BAR_COLS (w)); |
| 2826 | } |
| 2827 | else |
| 2828 | { |
| 2829 | old_size = XINT (w->total_lines); |
| 2830 | min_size = window_min_height; |
| 2831 | safe_min_size = MIN_SAFE_WINDOW_HEIGHT; |
| 2832 | } |
| 2833 | |
| 2834 | if (old_size < min_size && nodelete_p != 2) |
| 2835 | w->too_small_ok = Qt; |
| 2836 | |
| 2837 | /* Maybe delete WINDOW if it's too small. */ |
| 2838 | if (nodelete_p != 1 && !NILP (w->parent)) |
| 2839 | { |
| 2840 | if (!MINI_WINDOW_P (w) && !NILP (w->too_small_ok)) |
| 2841 | min_size = width_p ? MIN_SAFE_WINDOW_WIDTH : MIN_SAFE_WINDOW_HEIGHT; |
| 2842 | if (min_size < safe_min_size) |
| 2843 | min_size = safe_min_size; |
| 2844 | if (size < min_size) |
| 2845 | { |
| 2846 | delete_window (window); |
| 2847 | return; |
| 2848 | } |
| 2849 | } |
| 2850 | |
| 2851 | /* Set redisplay hints. */ |
| 2852 | w->last_modified = make_number (0); |
| 2853 | w->last_overlay_modified = make_number (0); |
| 2854 | windows_or_buffers_changed++; |
| 2855 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (w->frame)) = 1; |
| 2856 | |
| 2857 | if (width_p) |
| 2858 | { |
| 2859 | sideward = &w->vchild; |
| 2860 | forward = &w->hchild; |
| 2861 | w->total_cols = make_number (size); |
| 2862 | adjust_window_margins (w); |
| 2863 | } |
| 2864 | else |
| 2865 | { |
| 2866 | sideward = &w->hchild; |
| 2867 | forward = &w->vchild; |
| 2868 | w->total_lines = make_number (size); |
| 2869 | w->orig_total_lines = Qnil; |
| 2870 | } |
| 2871 | |
| 2872 | if (!NILP (*sideward)) |
| 2873 | { |
| 2874 | for (child = *sideward; !NILP (child); child = c->next) |
| 2875 | { |
| 2876 | c = XWINDOW (child); |
| 2877 | if (width_p) |
| 2878 | c->left_col = w->left_col; |
| 2879 | else |
| 2880 | c->top_line = w->top_line; |
| 2881 | size_window (child, size, width_p, nodelete_p); |
| 2882 | } |
| 2883 | } |
| 2884 | else if (!NILP (*forward)) |
| 2885 | { |
| 2886 | int fixed_size, each, extra, n; |
| 2887 | int resize_fixed_p, nfixed; |
| 2888 | int last_pos, first_pos, nchildren, total; |
| 2889 | int *new_sizes = NULL; |
| 2890 | |
| 2891 | /* Determine the fixed-size portion of the this window, and the |
| 2892 | number of child windows. */ |
| 2893 | fixed_size = nchildren = nfixed = total = 0; |
| 2894 | for (child = *forward; !NILP (child); child = c->next, ++nchildren) |
| 2895 | { |
| 2896 | int child_size; |
| 2897 | |
| 2898 | c = XWINDOW (child); |
| 2899 | child_size = width_p ? XINT (c->total_cols) : XINT (c->total_lines); |
| 2900 | total += child_size; |
| 2901 | |
| 2902 | if (window_fixed_size_p (c, width_p, 0)) |
| 2903 | { |
| 2904 | fixed_size += child_size; |
| 2905 | ++nfixed; |
| 2906 | } |
| 2907 | } |
| 2908 | |
| 2909 | /* If the new size is smaller than fixed_size, or if there |
| 2910 | aren't any resizable windows, allow resizing fixed-size |
| 2911 | windows. */ |
| 2912 | resize_fixed_p = nfixed == nchildren || size < fixed_size; |
| 2913 | |
| 2914 | /* Compute how many lines/columns to add/remove to each child. The |
| 2915 | value of extra takes care of rounding errors. */ |
| 2916 | n = resize_fixed_p ? nchildren : nchildren - nfixed; |
| 2917 | if (size < total && n > 1) |
| 2918 | new_sizes = shrink_windows (total, size, nchildren, n, min_size, |
| 2919 | resize_fixed_p, *forward, width_p); |
| 2920 | else |
| 2921 | { |
| 2922 | each = (size - total) / n; |
| 2923 | extra = (size - total) - n * each; |
| 2924 | } |
| 2925 | |
| 2926 | /* Compute new children heights and edge positions. */ |
| 2927 | first_pos = width_p ? XINT (w->left_col) : XINT (w->top_line); |
| 2928 | last_pos = first_pos; |
| 2929 | for (n = 0, child = *forward; !NILP (child); child = c->next, ++n) |
| 2930 | { |
| 2931 | int new_size, old_size; |
| 2932 | |
| 2933 | c = XWINDOW (child); |
| 2934 | old_size = width_p ? XFASTINT (c->total_cols) : XFASTINT (c->total_lines); |
| 2935 | new_size = old_size; |
| 2936 | |
| 2937 | /* The top or left edge position of this child equals the |
| 2938 | bottom or right edge of its predecessor. */ |
| 2939 | if (width_p) |
| 2940 | c->left_col = make_number (last_pos); |
| 2941 | else |
| 2942 | c->top_line = make_number (last_pos); |
| 2943 | |
| 2944 | /* If this child can be resized, do it. */ |
| 2945 | if (resize_fixed_p || !window_fixed_size_p (c, width_p, 0)) |
| 2946 | { |
| 2947 | new_size = new_sizes ? new_sizes[n] : old_size + each + extra; |
| 2948 | extra = 0; |
| 2949 | } |
| 2950 | |
| 2951 | /* Set new height. Note that size_window also propagates |
| 2952 | edge positions to children, so it's not a no-op if we |
| 2953 | didn't change the child's size. */ |
| 2954 | size_window (child, new_size, width_p, 1); |
| 2955 | |
| 2956 | /* Remember the bottom/right edge position of this child; it |
| 2957 | will be used to set the top/left edge of the next child. */ |
| 2958 | last_pos += new_size; |
| 2959 | } |
| 2960 | |
| 2961 | if (new_sizes) xfree (new_sizes); |
| 2962 | |
| 2963 | /* We should have covered the parent exactly with child windows. */ |
| 2964 | xassert (size == last_pos - first_pos); |
| 2965 | |
| 2966 | /* Now delete any children that became too small. */ |
| 2967 | if (!nodelete_p) |
| 2968 | for (child = *forward; !NILP (child); child = c->next) |
| 2969 | { |
| 2970 | int child_size; |
| 2971 | c = XWINDOW (child); |
| 2972 | child_size = width_p ? XINT (c->total_cols) : XINT (c->total_lines); |
| 2973 | size_window (child, child_size, width_p, 2); |
| 2974 | } |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | /* Set WINDOW's height to HEIGHT, and recursively change the height of |
| 2979 | WINDOW's children. NODELETE non-zero means don't delete windows |
| 2980 | that become too small in the process. (The caller should check |
| 2981 | later and do so if appropriate.) */ |
| 2982 | |
| 2983 | void |
| 2984 | set_window_height (window, height, nodelete) |
| 2985 | Lisp_Object window; |
| 2986 | int height; |
| 2987 | int nodelete; |
| 2988 | { |
| 2989 | size_window (window, height, 0, nodelete); |
| 2990 | } |
| 2991 | |
| 2992 | |
| 2993 | /* Set WINDOW's width to WIDTH, and recursively change the width of |
| 2994 | WINDOW's children. NODELETE non-zero means don't delete windows |
| 2995 | that become too small in the process. (The caller should check |
| 2996 | later and do so if appropriate.) */ |
| 2997 | |
| 2998 | void |
| 2999 | set_window_width (window, width, nodelete) |
| 3000 | Lisp_Object window; |
| 3001 | int width; |
| 3002 | int nodelete; |
| 3003 | { |
| 3004 | size_window (window, width, 1, nodelete); |
| 3005 | } |
| 3006 | |
| 3007 | /* Change window heights in windows rooted in WINDOW by N lines. */ |
| 3008 | |
| 3009 | void |
| 3010 | change_window_heights (window, n) |
| 3011 | Lisp_Object window; |
| 3012 | int n; |
| 3013 | { |
| 3014 | struct window *w = XWINDOW (window); |
| 3015 | |
| 3016 | XSETFASTINT (w->top_line, XFASTINT (w->top_line) + n); |
| 3017 | XSETFASTINT (w->total_lines, XFASTINT (w->total_lines) - n); |
| 3018 | |
| 3019 | if (INTEGERP (w->orig_top_line)) |
| 3020 | XSETFASTINT (w->orig_top_line, XFASTINT (w->orig_top_line) + n); |
| 3021 | if (INTEGERP (w->orig_total_lines)) |
| 3022 | XSETFASTINT (w->orig_total_lines, XFASTINT (w->orig_total_lines) - n); |
| 3023 | |
| 3024 | /* Handle just the top child in a vertical split. */ |
| 3025 | if (!NILP (w->vchild)) |
| 3026 | change_window_heights (w->vchild, n); |
| 3027 | |
| 3028 | /* Adjust all children in a horizontal split. */ |
| 3029 | for (window = w->hchild; !NILP (window); window = w->next) |
| 3030 | { |
| 3031 | w = XWINDOW (window); |
| 3032 | change_window_heights (window, n); |
| 3033 | } |
| 3034 | } |
| 3035 | |
| 3036 | \f |
| 3037 | int window_select_count; |
| 3038 | |
| 3039 | Lisp_Object |
| 3040 | Fset_window_buffer_unwind (obuf) |
| 3041 | Lisp_Object obuf; |
| 3042 | { |
| 3043 | Fset_buffer (obuf); |
| 3044 | return Qnil; |
| 3045 | } |
| 3046 | |
| 3047 | EXFUN (Fset_window_fringes, 4); |
| 3048 | EXFUN (Fset_window_scroll_bars, 4); |
| 3049 | |
| 3050 | /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero |
| 3051 | means it's allowed to run hooks. See make_frame for a case where |
| 3052 | it's not allowed. KEEP_MARGINS_P non-zero means that the current |
| 3053 | margins, fringes, and scroll-bar settings of the window are not |
| 3054 | reset from the buffer's local settings. */ |
| 3055 | |
| 3056 | void |
| 3057 | set_window_buffer (window, buffer, run_hooks_p, keep_margins_p) |
| 3058 | Lisp_Object window, buffer; |
| 3059 | int run_hooks_p, keep_margins_p; |
| 3060 | { |
| 3061 | struct window *w = XWINDOW (window); |
| 3062 | struct buffer *b = XBUFFER (buffer); |
| 3063 | int count = SPECPDL_INDEX (); |
| 3064 | |
| 3065 | w->buffer = buffer; |
| 3066 | |
| 3067 | if (EQ (window, selected_window)) |
| 3068 | b->last_selected_window = window; |
| 3069 | |
| 3070 | /* Let redisplay errors through. */ |
| 3071 | b->display_error_modiff = 0; |
| 3072 | |
| 3073 | /* Update time stamps of buffer display. */ |
| 3074 | if (INTEGERP (b->display_count)) |
| 3075 | XSETINT (b->display_count, XINT (b->display_count) + 1); |
| 3076 | b->display_time = Fcurrent_time (); |
| 3077 | |
| 3078 | XSETFASTINT (w->window_end_pos, 0); |
| 3079 | XSETFASTINT (w->window_end_vpos, 0); |
| 3080 | bzero (&w->last_cursor, sizeof w->last_cursor); |
| 3081 | w->window_end_valid = Qnil; |
| 3082 | w->hscroll = w->min_hscroll = make_number (0); |
| 3083 | w->vscroll = 0; |
| 3084 | set_marker_both (w->pointm, buffer, BUF_PT (b), BUF_PT_BYTE (b)); |
| 3085 | set_marker_restricted (w->start, |
| 3086 | make_number (b->last_window_start), |
| 3087 | buffer); |
| 3088 | w->start_at_line_beg = Qnil; |
| 3089 | w->force_start = Qnil; |
| 3090 | XSETFASTINT (w->last_modified, 0); |
| 3091 | XSETFASTINT (w->last_overlay_modified, 0); |
| 3092 | windows_or_buffers_changed++; |
| 3093 | |
| 3094 | /* We must select BUFFER for running the window-scroll-functions. |
| 3095 | If WINDOW is selected, switch permanently. |
| 3096 | Otherwise, switch but go back to the ambient buffer afterward. */ |
| 3097 | if (EQ (window, selected_window)) |
| 3098 | Fset_buffer (buffer); |
| 3099 | /* We can't check ! NILP (Vwindow_scroll_functions) here |
| 3100 | because that might itself be a local variable. */ |
| 3101 | else if (window_initialized) |
| 3102 | { |
| 3103 | record_unwind_protect (Fset_window_buffer_unwind, Fcurrent_buffer ()); |
| 3104 | Fset_buffer (buffer); |
| 3105 | } |
| 3106 | |
| 3107 | if (!keep_margins_p) |
| 3108 | { |
| 3109 | /* Set left and right marginal area width etc. from buffer. */ |
| 3110 | |
| 3111 | /* This may call adjust_window_margins three times, so |
| 3112 | temporarily disable window margins. */ |
| 3113 | Lisp_Object save_left = w->left_margin_cols; |
| 3114 | Lisp_Object save_right = w->right_margin_cols; |
| 3115 | |
| 3116 | w->left_margin_cols = w->right_margin_cols = Qnil; |
| 3117 | |
| 3118 | Fset_window_fringes (window, |
| 3119 | b->left_fringe_width, b->right_fringe_width, |
| 3120 | b->fringes_outside_margins); |
| 3121 | |
| 3122 | Fset_window_scroll_bars (window, |
| 3123 | b->scroll_bar_width, |
| 3124 | b->vertical_scroll_bar_type, Qnil); |
| 3125 | |
| 3126 | w->left_margin_cols = save_left; |
| 3127 | w->right_margin_cols = save_right; |
| 3128 | |
| 3129 | Fset_window_margins (window, |
| 3130 | b->left_margin_cols, b->right_margin_cols); |
| 3131 | } |
| 3132 | |
| 3133 | if (run_hooks_p) |
| 3134 | { |
| 3135 | if (! NILP (Vwindow_scroll_functions)) |
| 3136 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
| 3137 | Fmarker_position (w->start)); |
| 3138 | |
| 3139 | if (! NILP (Vwindow_configuration_change_hook) |
| 3140 | && ! NILP (Vrun_hooks)) |
| 3141 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 3142 | } |
| 3143 | |
| 3144 | unbind_to (count, Qnil); |
| 3145 | } |
| 3146 | |
| 3147 | |
| 3148 | DEFUN ("set-window-buffer", Fset_window_buffer, Sset_window_buffer, 2, 3, 0, |
| 3149 | doc: /* Make WINDOW display BUFFER as its contents. |
| 3150 | BUFFER can be a buffer or the name of an existing buffer. |
| 3151 | Optional third arg KEEP-MARGINS non-nil means that WINDOW's current |
| 3152 | display margins, fringe widths, and scroll bar settings are maintained; |
| 3153 | the default is to reset these from BUFFER's local settings or the frame |
| 3154 | defaults. |
| 3155 | |
| 3156 | This function runs the hook `window-scroll-functions'. */) |
| 3157 | (window, buffer, keep_margins) |
| 3158 | register Lisp_Object window, buffer, keep_margins; |
| 3159 | { |
| 3160 | register Lisp_Object tem; |
| 3161 | register struct window *w = decode_window (window); |
| 3162 | |
| 3163 | XSETWINDOW (window, w); |
| 3164 | buffer = Fget_buffer (buffer); |
| 3165 | CHECK_BUFFER (buffer); |
| 3166 | |
| 3167 | if (NILP (XBUFFER (buffer)->name)) |
| 3168 | error ("Attempt to display deleted buffer"); |
| 3169 | |
| 3170 | tem = w->buffer; |
| 3171 | if (NILP (tem)) |
| 3172 | error ("Window is deleted"); |
| 3173 | else if (! EQ (tem, Qt)) /* w->buffer is t when the window |
| 3174 | is first being set up. */ |
| 3175 | { |
| 3176 | if (!NILP (w->dedicated) && !EQ (tem, buffer)) |
| 3177 | error ("Window is dedicated to `%s'", |
| 3178 | SDATA (XBUFFER (tem)->name)); |
| 3179 | |
| 3180 | unshow_buffer (w); |
| 3181 | } |
| 3182 | |
| 3183 | set_window_buffer (window, buffer, 1, !NILP (keep_margins)); |
| 3184 | return Qnil; |
| 3185 | } |
| 3186 | |
| 3187 | /* Note that selected_window can be nil |
| 3188 | when this is called from Fset_window_configuration. */ |
| 3189 | |
| 3190 | DEFUN ("select-window", Fselect_window, Sselect_window, 1, 2, 0, |
| 3191 | doc: /* Select WINDOW. Most editing will apply to WINDOW's buffer. |
| 3192 | If WINDOW is not already selected, make WINDOW's buffer current |
| 3193 | and make WINDOW the frame's selected window. Return WINDOW. |
| 3194 | Optional second arg NORECORD non-nil means |
| 3195 | do not put this buffer at the front of the list of recently selected ones. |
| 3196 | |
| 3197 | Note that the main editor command loop |
| 3198 | selects the buffer of the selected window before each command. */) |
| 3199 | (window, norecord) |
| 3200 | register Lisp_Object window, norecord; |
| 3201 | { |
| 3202 | register struct window *w; |
| 3203 | register struct window *ow; |
| 3204 | struct frame *sf; |
| 3205 | |
| 3206 | CHECK_LIVE_WINDOW (window); |
| 3207 | |
| 3208 | w = XWINDOW (window); |
| 3209 | w->frozen_window_start_p = 0; |
| 3210 | |
| 3211 | ++window_select_count; |
| 3212 | XSETFASTINT (w->use_time, window_select_count); |
| 3213 | if (EQ (window, selected_window)) |
| 3214 | return window; |
| 3215 | |
| 3216 | /* Store the current buffer's actual point into the |
| 3217 | old selected window. It belongs to that window, |
| 3218 | and when the window is not selected, must be in the window. */ |
| 3219 | if (!NILP (selected_window)) |
| 3220 | { |
| 3221 | ow = XWINDOW (selected_window); |
| 3222 | if (! NILP (ow->buffer)) |
| 3223 | set_marker_both (ow->pointm, ow->buffer, |
| 3224 | BUF_PT (XBUFFER (ow->buffer)), |
| 3225 | BUF_PT_BYTE (XBUFFER (ow->buffer))); |
| 3226 | } |
| 3227 | |
| 3228 | selected_window = window; |
| 3229 | sf = SELECTED_FRAME (); |
| 3230 | if (XFRAME (WINDOW_FRAME (w)) != sf) |
| 3231 | { |
| 3232 | XFRAME (WINDOW_FRAME (w))->selected_window = window; |
| 3233 | /* Use this rather than Fhandle_switch_frame |
| 3234 | so that FRAME_FOCUS_FRAME is moved appropriately as we |
| 3235 | move around in the state where a minibuffer in a separate |
| 3236 | frame is active. */ |
| 3237 | Fselect_frame (WINDOW_FRAME (w)); |
| 3238 | } |
| 3239 | else |
| 3240 | sf->selected_window = window; |
| 3241 | |
| 3242 | if (NILP (norecord)) |
| 3243 | record_buffer (w->buffer); |
| 3244 | Fset_buffer (w->buffer); |
| 3245 | |
| 3246 | XBUFFER (w->buffer)->last_selected_window = window; |
| 3247 | |
| 3248 | /* Go to the point recorded in the window. |
| 3249 | This is important when the buffer is in more |
| 3250 | than one window. It also matters when |
| 3251 | redisplay_window has altered point after scrolling, |
| 3252 | because it makes the change only in the window. */ |
| 3253 | { |
| 3254 | register int new_point = marker_position (w->pointm); |
| 3255 | if (new_point < BEGV) |
| 3256 | SET_PT (BEGV); |
| 3257 | else if (new_point > ZV) |
| 3258 | SET_PT (ZV); |
| 3259 | else |
| 3260 | SET_PT (new_point); |
| 3261 | } |
| 3262 | |
| 3263 | windows_or_buffers_changed++; |
| 3264 | return window; |
| 3265 | } |
| 3266 | |
| 3267 | static Lisp_Object |
| 3268 | select_window_norecord (window) |
| 3269 | Lisp_Object window; |
| 3270 | { |
| 3271 | return Fselect_window (window, Qt); |
| 3272 | } |
| 3273 | \f |
| 3274 | /* Deiconify the frame containing the window WINDOW, |
| 3275 | unless it is the selected frame; |
| 3276 | then return WINDOW. |
| 3277 | |
| 3278 | The reason for the exception for the selected frame |
| 3279 | is that it seems better not to change the selected frames visibility |
| 3280 | merely because of displaying a different buffer in it. |
| 3281 | The deiconification is useful when a buffer gets shown in |
| 3282 | another frame that you were not using lately. */ |
| 3283 | |
| 3284 | static Lisp_Object |
| 3285 | display_buffer_1 (window) |
| 3286 | Lisp_Object window; |
| 3287 | { |
| 3288 | Lisp_Object frame = XWINDOW (window)->frame; |
| 3289 | FRAME_PTR f = XFRAME (frame); |
| 3290 | |
| 3291 | FRAME_SAMPLE_VISIBILITY (f); |
| 3292 | |
| 3293 | if (EQ (frame, selected_frame)) |
| 3294 | ; /* Assume the selected frame is already visible enough. */ |
| 3295 | else if (minibuf_level > 0 |
| 3296 | && MINI_WINDOW_P (XWINDOW (selected_window)) |
| 3297 | && WINDOW_LIVE_P (minibuf_selected_window) |
| 3298 | && EQ (frame, WINDOW_FRAME (XWINDOW (minibuf_selected_window)))) |
| 3299 | ; /* Assume the frame from which we invoked the minibuffer is visible. */ |
| 3300 | else |
| 3301 | { |
| 3302 | if (FRAME_ICONIFIED_P (f)) |
| 3303 | Fmake_frame_visible (frame); |
| 3304 | else if (FRAME_VISIBLE_P (f)) |
| 3305 | Fraise_frame (frame); |
| 3306 | } |
| 3307 | |
| 3308 | return window; |
| 3309 | } |
| 3310 | |
| 3311 | DEFUN ("special-display-p", Fspecial_display_p, Sspecial_display_p, 1, 1, 0, |
| 3312 | doc: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame. |
| 3313 | If the value is t, `display-buffer' or `pop-to-buffer' would create a |
| 3314 | special frame for that buffer using the default frame parameters. |
| 3315 | |
| 3316 | If the value is a list, it is a list of frame parameters that would be used |
| 3317 | to make a frame for that buffer. |
| 3318 | The variables `special-display-buffer-names' |
| 3319 | and `special-display-regexps' control this. */) |
| 3320 | (buffer_name) |
| 3321 | Lisp_Object buffer_name; |
| 3322 | { |
| 3323 | Lisp_Object tem; |
| 3324 | |
| 3325 | CHECK_STRING (buffer_name); |
| 3326 | |
| 3327 | tem = Fmember (buffer_name, Vspecial_display_buffer_names); |
| 3328 | if (!NILP (tem)) |
| 3329 | return Qt; |
| 3330 | |
| 3331 | tem = Fassoc (buffer_name, Vspecial_display_buffer_names); |
| 3332 | if (!NILP (tem)) |
| 3333 | return XCDR (tem); |
| 3334 | |
| 3335 | for (tem = Vspecial_display_regexps; CONSP (tem); tem = XCDR (tem)) |
| 3336 | { |
| 3337 | Lisp_Object car = XCAR (tem); |
| 3338 | if (STRINGP (car) |
| 3339 | && fast_string_match (car, buffer_name) >= 0) |
| 3340 | return Qt; |
| 3341 | else if (CONSP (car) |
| 3342 | && STRINGP (XCAR (car)) |
| 3343 | && fast_string_match (XCAR (car), buffer_name) >= 0) |
| 3344 | return XCDR (car); |
| 3345 | } |
| 3346 | return Qnil; |
| 3347 | } |
| 3348 | |
| 3349 | DEFUN ("same-window-p", Fsame_window_p, Ssame_window_p, 1, 1, 0, |
| 3350 | doc: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window. |
| 3351 | More precisely, if `display-buffer' or `pop-to-buffer' would display |
| 3352 | that buffer in the selected window rather than (as usual) in some other window. |
| 3353 | See `same-window-buffer-names' and `same-window-regexps'. */) |
| 3354 | (buffer_name) |
| 3355 | Lisp_Object buffer_name; |
| 3356 | { |
| 3357 | Lisp_Object tem; |
| 3358 | |
| 3359 | CHECK_STRING (buffer_name); |
| 3360 | |
| 3361 | tem = Fmember (buffer_name, Vsame_window_buffer_names); |
| 3362 | if (!NILP (tem)) |
| 3363 | return Qt; |
| 3364 | |
| 3365 | tem = Fassoc (buffer_name, Vsame_window_buffer_names); |
| 3366 | if (!NILP (tem)) |
| 3367 | return Qt; |
| 3368 | |
| 3369 | for (tem = Vsame_window_regexps; CONSP (tem); tem = XCDR (tem)) |
| 3370 | { |
| 3371 | Lisp_Object car = XCAR (tem); |
| 3372 | if (STRINGP (car) |
| 3373 | && fast_string_match (car, buffer_name) >= 0) |
| 3374 | return Qt; |
| 3375 | else if (CONSP (car) |
| 3376 | && STRINGP (XCAR (car)) |
| 3377 | && fast_string_match (XCAR (car), buffer_name) >= 0) |
| 3378 | return Qt; |
| 3379 | } |
| 3380 | return Qnil; |
| 3381 | } |
| 3382 | |
| 3383 | /* Use B so the default is (other-buffer). */ |
| 3384 | DEFUN ("display-buffer", Fdisplay_buffer, Sdisplay_buffer, 1, 3, |
| 3385 | "BDisplay buffer: \nP", |
| 3386 | doc: /* Make BUFFER appear in some window but don't select it. |
| 3387 | BUFFER must be the name of an existing buffer, or, when called from Lisp, |
| 3388 | a buffer. |
| 3389 | If BUFFER is shown already in some window, just use that one, |
| 3390 | unless the window is the selected window and the optional second |
| 3391 | argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg). |
| 3392 | If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER. |
| 3393 | Returns the window displaying BUFFER. |
| 3394 | If `display-buffer-reuse-frames' is non-nil, and another frame is currently |
| 3395 | displaying BUFFER, then simply raise that frame. |
| 3396 | |
| 3397 | The variables `special-display-buffer-names', |
| 3398 | `special-display-regexps', `same-window-buffer-names', and |
| 3399 | `same-window-regexps' customize how certain buffer names are handled. |
| 3400 | The latter two take effect only if NOT-THIS-WINDOW is t. |
| 3401 | |
| 3402 | If optional argument FRAME is `visible', search all visible frames. |
| 3403 | If FRAME is 0, search all visible and iconified frames. |
| 3404 | If FRAME is t, search all frames. |
| 3405 | If FRAME is a frame, search only that frame. |
| 3406 | If FRAME is nil, search only the selected frame |
| 3407 | (actually the last nonminibuffer frame), |
| 3408 | unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil, |
| 3409 | which means search visible and iconified frames. |
| 3410 | |
| 3411 | If a full-width window on a splittable frame is available to display |
| 3412 | the buffer, it may be split, subject to the value of the variable |
| 3413 | `split-height-threshold'. |
| 3414 | |
| 3415 | If `even-window-heights' is non-nil, window heights will be evened out |
| 3416 | if displaying the buffer causes two vertically adjacent windows to be |
| 3417 | displayed. */) |
| 3418 | (buffer, not_this_window, frame) |
| 3419 | register Lisp_Object buffer, not_this_window, frame; |
| 3420 | { |
| 3421 | register Lisp_Object window, tem, swp; |
| 3422 | struct frame *f; |
| 3423 | |
| 3424 | swp = Qnil; |
| 3425 | buffer = Fget_buffer (buffer); |
| 3426 | CHECK_BUFFER (buffer); |
| 3427 | |
| 3428 | if (!NILP (Vdisplay_buffer_function)) |
| 3429 | return call2 (Vdisplay_buffer_function, buffer, not_this_window); |
| 3430 | |
| 3431 | if (NILP (not_this_window) |
| 3432 | && XBUFFER (XWINDOW (selected_window)->buffer) == XBUFFER (buffer)) |
| 3433 | return display_buffer_1 (selected_window); |
| 3434 | |
| 3435 | /* See if the user has specified this buffer should appear |
| 3436 | in the selected window. */ |
| 3437 | if (NILP (not_this_window)) |
| 3438 | { |
| 3439 | swp = Fsame_window_p (XBUFFER (buffer)->name); |
| 3440 | if (!NILP (swp) && !no_switch_window (selected_window)) |
| 3441 | { |
| 3442 | Fswitch_to_buffer (buffer, Qnil); |
| 3443 | return display_buffer_1 (selected_window); |
| 3444 | } |
| 3445 | } |
| 3446 | |
| 3447 | /* If the user wants pop-up-frames or display-buffer-reuse-frames, |
| 3448 | look for a window showing BUFFER on any visible or iconified frame. |
| 3449 | Otherwise search only the current frame. */ |
| 3450 | if (! NILP (frame)) |
| 3451 | tem = frame; |
| 3452 | else if (pop_up_frames |
| 3453 | || display_buffer_reuse_frames |
| 3454 | || last_nonminibuf_frame == 0) |
| 3455 | XSETFASTINT (tem, 0); |
| 3456 | else |
| 3457 | XSETFRAME (tem, last_nonminibuf_frame); |
| 3458 | |
| 3459 | window = Fget_buffer_window (buffer, tem); |
| 3460 | if (!NILP (window) |
| 3461 | && (NILP (not_this_window) || !EQ (window, selected_window))) |
| 3462 | return display_buffer_1 (window); |
| 3463 | |
| 3464 | /* Certain buffer names get special handling. */ |
| 3465 | if (!NILP (Vspecial_display_function) && NILP (swp)) |
| 3466 | { |
| 3467 | tem = Fspecial_display_p (XBUFFER (buffer)->name); |
| 3468 | if (EQ (tem, Qt)) |
| 3469 | return call1 (Vspecial_display_function, buffer); |
| 3470 | if (CONSP (tem)) |
| 3471 | return call2 (Vspecial_display_function, buffer, tem); |
| 3472 | } |
| 3473 | |
| 3474 | /* If there are no frames open that have more than a minibuffer, |
| 3475 | we need to create a new frame. */ |
| 3476 | if (pop_up_frames || last_nonminibuf_frame == 0) |
| 3477 | { |
| 3478 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
| 3479 | Fset_window_buffer (window, buffer, Qnil); |
| 3480 | return display_buffer_1 (window); |
| 3481 | } |
| 3482 | |
| 3483 | f = SELECTED_FRAME (); |
| 3484 | if (pop_up_windows |
| 3485 | || FRAME_MINIBUF_ONLY_P (f) |
| 3486 | /* If the current frame is a special display frame, |
| 3487 | don't try to reuse its windows. */ |
| 3488 | || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f))->dedicated)) |
| 3489 | { |
| 3490 | Lisp_Object frames; |
| 3491 | |
| 3492 | frames = Qnil; |
| 3493 | if (FRAME_MINIBUF_ONLY_P (f)) |
| 3494 | XSETFRAME (frames, last_nonminibuf_frame); |
| 3495 | /* Don't try to create a window if we would get an error. */ |
| 3496 | if (split_height_threshold < window_min_height << 1) |
| 3497 | split_height_threshold = window_min_height << 1; |
| 3498 | |
| 3499 | /* Note that both Fget_largest_window and Fget_lru_window |
| 3500 | ignore minibuffers and dedicated windows. |
| 3501 | This means they can return nil. */ |
| 3502 | |
| 3503 | /* If the frame we would try to split cannot be split, |
| 3504 | try other frames. */ |
| 3505 | if (FRAME_NO_SPLIT_P (NILP (frames) ? f : last_nonminibuf_frame)) |
| 3506 | { |
| 3507 | /* Try visible frames first. */ |
| 3508 | window = Fget_largest_window (Qvisible); |
| 3509 | /* If that didn't work, try iconified frames. */ |
| 3510 | if (NILP (window)) |
| 3511 | window = Fget_largest_window (make_number (0)); |
| 3512 | if (NILP (window)) |
| 3513 | window = Fget_largest_window (Qt); |
| 3514 | } |
| 3515 | else |
| 3516 | window = Fget_largest_window (frames); |
| 3517 | |
| 3518 | /* If we got a tall enough full-width window that can be split, |
| 3519 | split it. */ |
| 3520 | if (!NILP (window) |
| 3521 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
| 3522 | && window_height (window) >= split_height_threshold |
| 3523 | && WINDOW_FULL_WIDTH_P (XWINDOW (window))) |
| 3524 | window = Fsplit_window (window, Qnil, Qnil); |
| 3525 | else |
| 3526 | { |
| 3527 | Lisp_Object upper, lower, other; |
| 3528 | |
| 3529 | window = Fget_lru_window (frames); |
| 3530 | /* If the LRU window is selected, and big enough, |
| 3531 | and can be split, split it. */ |
| 3532 | if (!NILP (window) |
| 3533 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
| 3534 | && (EQ (window, selected_window) |
| 3535 | || EQ (XWINDOW (window)->parent, Qnil)) |
| 3536 | && window_height (window) >= window_min_height << 1) |
| 3537 | window = Fsplit_window (window, Qnil, Qnil); |
| 3538 | /* If Fget_lru_window returned nil, try other approaches. */ |
| 3539 | |
| 3540 | /* Try visible frames first. */ |
| 3541 | if (NILP (window)) |
| 3542 | window = Fget_buffer_window (buffer, Qvisible); |
| 3543 | if (NILP (window)) |
| 3544 | window = Fget_largest_window (Qvisible); |
| 3545 | /* If that didn't work, try iconified frames. */ |
| 3546 | if (NILP (window)) |
| 3547 | window = Fget_buffer_window (buffer, make_number (0)); |
| 3548 | if (NILP (window)) |
| 3549 | window = Fget_largest_window (make_number (0)); |
| 3550 | /* Try invisible frames. */ |
| 3551 | if (NILP (window)) |
| 3552 | window = Fget_buffer_window (buffer, Qt); |
| 3553 | if (NILP (window)) |
| 3554 | window = Fget_largest_window (Qt); |
| 3555 | /* As a last resort, make a new frame. */ |
| 3556 | if (NILP (window)) |
| 3557 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
| 3558 | /* If window appears above or below another, |
| 3559 | even out their heights. */ |
| 3560 | other = upper = lower = Qnil; |
| 3561 | if (!NILP (XWINDOW (window)->prev)) |
| 3562 | other = upper = XWINDOW (window)->prev, lower = window; |
| 3563 | if (!NILP (XWINDOW (window)->next)) |
| 3564 | other = lower = XWINDOW (window)->next, upper = window; |
| 3565 | if (!NILP (other) |
| 3566 | && !NILP (Veven_window_heights) |
| 3567 | /* Check that OTHER and WINDOW are vertically arrayed. */ |
| 3568 | && !EQ (XWINDOW (other)->top_line, XWINDOW (window)->top_line) |
| 3569 | && (XFASTINT (XWINDOW (other)->total_lines) |
| 3570 | > XFASTINT (XWINDOW (window)->total_lines))) |
| 3571 | { |
| 3572 | int total = (XFASTINT (XWINDOW (other)->total_lines) |
| 3573 | + XFASTINT (XWINDOW (window)->total_lines)); |
| 3574 | enlarge_window (upper, |
| 3575 | total / 2 - XFASTINT (XWINDOW (upper)->total_lines), |
| 3576 | 0, 0); |
| 3577 | } |
| 3578 | } |
| 3579 | } |
| 3580 | else |
| 3581 | window = Fget_lru_window (Qnil); |
| 3582 | |
| 3583 | Fset_window_buffer (window, buffer, Qnil); |
| 3584 | return display_buffer_1 (window); |
| 3585 | } |
| 3586 | |
| 3587 | |
| 3588 | DEFUN ("force-window-update", Fforce_window_update, Sforce_window_update, |
| 3589 | 0, 1, 0, |
| 3590 | doc: /* Force redisplay of all windows. |
| 3591 | If optional arg OBJECT is a window, force redisplay of that window only. |
| 3592 | If OBJECT is a buffer or buffer name, force redisplay of all windows |
| 3593 | displaying that buffer. */) |
| 3594 | (object) |
| 3595 | Lisp_Object object; |
| 3596 | { |
| 3597 | if (NILP (object)) |
| 3598 | { |
| 3599 | windows_or_buffers_changed++; |
| 3600 | update_mode_lines++; |
| 3601 | return Qt; |
| 3602 | } |
| 3603 | |
| 3604 | if (WINDOWP (object)) |
| 3605 | { |
| 3606 | struct window *w = XWINDOW (object); |
| 3607 | mark_window_display_accurate (object, 0); |
| 3608 | w->update_mode_line = Qt; |
| 3609 | if (BUFFERP (w->buffer)) |
| 3610 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 3611 | ++update_mode_lines; |
| 3612 | return Qt; |
| 3613 | } |
| 3614 | |
| 3615 | if (STRINGP (object)) |
| 3616 | object = Fget_buffer (object); |
| 3617 | if (BUFFERP (object) && !NILP (XBUFFER (object)->name)) |
| 3618 | { |
| 3619 | /* Walk all windows looking for buffer, and force update |
| 3620 | of each of those windows. */ |
| 3621 | |
| 3622 | object = window_loop (REDISPLAY_BUFFER_WINDOWS, object, 0, Qvisible); |
| 3623 | return NILP (object) ? Qnil : Qt; |
| 3624 | } |
| 3625 | |
| 3626 | /* If nothing suitable was found, just return. |
| 3627 | We could signal an error, but this feature will typically be used |
| 3628 | asynchronously in timers or process sentinels, so we don't. */ |
| 3629 | return Qnil; |
| 3630 | } |
| 3631 | |
| 3632 | |
| 3633 | void |
| 3634 | temp_output_buffer_show (buf) |
| 3635 | register Lisp_Object buf; |
| 3636 | { |
| 3637 | register struct buffer *old = current_buffer; |
| 3638 | register Lisp_Object window; |
| 3639 | register struct window *w; |
| 3640 | |
| 3641 | XBUFFER (buf)->directory = current_buffer->directory; |
| 3642 | |
| 3643 | Fset_buffer (buf); |
| 3644 | BUF_SAVE_MODIFF (XBUFFER (buf)) = MODIFF; |
| 3645 | BEGV = BEG; |
| 3646 | ZV = Z; |
| 3647 | SET_PT (BEG); |
| 3648 | #if 0 /* rms: there should be no reason for this. */ |
| 3649 | XBUFFER (buf)->prevent_redisplay_optimizations_p = 1; |
| 3650 | #endif |
| 3651 | set_buffer_internal (old); |
| 3652 | |
| 3653 | if (!EQ (Vtemp_buffer_show_function, Qnil)) |
| 3654 | call1 (Vtemp_buffer_show_function, buf); |
| 3655 | else |
| 3656 | { |
| 3657 | window = Fdisplay_buffer (buf, Qnil, Qnil); |
| 3658 | |
| 3659 | if (!EQ (XWINDOW (window)->frame, selected_frame)) |
| 3660 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window))); |
| 3661 | Vminibuf_scroll_window = window; |
| 3662 | w = XWINDOW (window); |
| 3663 | XSETFASTINT (w->hscroll, 0); |
| 3664 | XSETFASTINT (w->min_hscroll, 0); |
| 3665 | set_marker_restricted_both (w->start, buf, BEG, BEG); |
| 3666 | set_marker_restricted_both (w->pointm, buf, BEG, BEG); |
| 3667 | |
| 3668 | /* Run temp-buffer-show-hook, with the chosen window selected |
| 3669 | and its buffer current. */ |
| 3670 | |
| 3671 | if (!NILP (Vrun_hooks) |
| 3672 | && !NILP (Fboundp (Qtemp_buffer_show_hook)) |
| 3673 | && !NILP (Fsymbol_value (Qtemp_buffer_show_hook))) |
| 3674 | { |
| 3675 | int count = SPECPDL_INDEX (); |
| 3676 | Lisp_Object prev_window, prev_buffer; |
| 3677 | prev_window = selected_window; |
| 3678 | XSETBUFFER (prev_buffer, old); |
| 3679 | |
| 3680 | /* Select the window that was chosen, for running the hook. |
| 3681 | Note: Both Fselect_window and select_window_norecord may |
| 3682 | set-buffer to the buffer displayed in the window, |
| 3683 | so we need to save the current buffer. --stef */ |
| 3684 | record_unwind_protect (Fset_buffer, prev_buffer); |
| 3685 | record_unwind_protect (select_window_norecord, prev_window); |
| 3686 | Fselect_window (window, Qt); |
| 3687 | Fset_buffer (w->buffer); |
| 3688 | call1 (Vrun_hooks, Qtemp_buffer_show_hook); |
| 3689 | unbind_to (count, Qnil); |
| 3690 | } |
| 3691 | } |
| 3692 | } |
| 3693 | \f |
| 3694 | static void |
| 3695 | make_dummy_parent (window) |
| 3696 | Lisp_Object window; |
| 3697 | { |
| 3698 | Lisp_Object new; |
| 3699 | register struct window *o, *p; |
| 3700 | int i; |
| 3701 | |
| 3702 | o = XWINDOW (window); |
| 3703 | p = allocate_window (); |
| 3704 | for (i = 0; i < VECSIZE (struct window); ++i) |
| 3705 | ((struct Lisp_Vector *) p)->contents[i] |
| 3706 | = ((struct Lisp_Vector *)o)->contents[i]; |
| 3707 | XSETWINDOW (new, p); |
| 3708 | |
| 3709 | ++sequence_number; |
| 3710 | XSETFASTINT (p->sequence_number, sequence_number); |
| 3711 | |
| 3712 | /* Put new into window structure in place of window */ |
| 3713 | replace_window (window, new); |
| 3714 | |
| 3715 | o->next = Qnil; |
| 3716 | o->prev = Qnil; |
| 3717 | o->vchild = Qnil; |
| 3718 | o->hchild = Qnil; |
| 3719 | o->parent = new; |
| 3720 | |
| 3721 | p->start = Qnil; |
| 3722 | p->pointm = Qnil; |
| 3723 | p->buffer = Qnil; |
| 3724 | } |
| 3725 | |
| 3726 | DEFUN ("split-window", Fsplit_window, Ssplit_window, 0, 3, "", |
| 3727 | doc: /* Split WINDOW, putting SIZE lines in the first of the pair. |
| 3728 | WINDOW defaults to selected one and SIZE to half its size. |
| 3729 | If optional third arg HORFLAG is non-nil, split side by side |
| 3730 | and put SIZE columns in the first of the pair. In that case, |
| 3731 | SIZE includes that window's scroll bar, or the divider column to its right. |
| 3732 | Interactively, all arguments are nil. |
| 3733 | |
| 3734 | Returns the newly created window (which is the lower or rightmost one). |
| 3735 | The upper or leftmost window is the original one and remains selected. |
| 3736 | See Info node `(elisp)Splitting Windows' for more details and examples.*/) |
| 3737 | (window, size, horflag) |
| 3738 | Lisp_Object window, size, horflag; |
| 3739 | { |
| 3740 | register Lisp_Object new; |
| 3741 | register struct window *o, *p; |
| 3742 | FRAME_PTR fo; |
| 3743 | register int size_int; |
| 3744 | |
| 3745 | if (NILP (window)) |
| 3746 | window = selected_window; |
| 3747 | else |
| 3748 | CHECK_LIVE_WINDOW (window); |
| 3749 | |
| 3750 | o = XWINDOW (window); |
| 3751 | fo = XFRAME (WINDOW_FRAME (o)); |
| 3752 | |
| 3753 | if (NILP (size)) |
| 3754 | { |
| 3755 | if (!NILP (horflag)) |
| 3756 | /* Calculate the size of the left-hand window, by dividing |
| 3757 | the usable space in columns by two. |
| 3758 | We round up, since the left-hand window may include |
| 3759 | a dividing line, while the right-hand may not. */ |
| 3760 | size_int = (XFASTINT (o->total_cols) + 1) >> 1; |
| 3761 | else |
| 3762 | size_int = XFASTINT (o->total_lines) >> 1; |
| 3763 | } |
| 3764 | else |
| 3765 | { |
| 3766 | CHECK_NUMBER (size); |
| 3767 | size_int = XINT (size); |
| 3768 | } |
| 3769 | |
| 3770 | if (MINI_WINDOW_P (o)) |
| 3771 | error ("Attempt to split minibuffer window"); |
| 3772 | else if (window_fixed_size_p (o, !NILP (horflag), 0)) |
| 3773 | error ("Attempt to split fixed-size window"); |
| 3774 | |
| 3775 | check_min_window_sizes (); |
| 3776 | |
| 3777 | if (NILP (horflag)) |
| 3778 | { |
| 3779 | if (size_int < window_min_height) |
| 3780 | error ("Window height %d too small (after splitting)", size_int); |
| 3781 | if (size_int + window_min_height > XFASTINT (o->total_lines)) |
| 3782 | error ("Window height %d too small (after splitting)", |
| 3783 | XFASTINT (o->total_lines) - size_int); |
| 3784 | if (NILP (o->parent) |
| 3785 | || NILP (XWINDOW (o->parent)->vchild)) |
| 3786 | { |
| 3787 | make_dummy_parent (window); |
| 3788 | new = o->parent; |
| 3789 | XWINDOW (new)->vchild = window; |
| 3790 | } |
| 3791 | } |
| 3792 | else |
| 3793 | { |
| 3794 | if (size_int < window_min_width) |
| 3795 | error ("Window width %d too small (after splitting)", size_int); |
| 3796 | |
| 3797 | if (size_int + window_min_width > XFASTINT (o->total_cols)) |
| 3798 | error ("Window width %d too small (after splitting)", |
| 3799 | XFASTINT (o->total_cols) - size_int); |
| 3800 | if (NILP (o->parent) |
| 3801 | || NILP (XWINDOW (o->parent)->hchild)) |
| 3802 | { |
| 3803 | make_dummy_parent (window); |
| 3804 | new = o->parent; |
| 3805 | XWINDOW (new)->hchild = window; |
| 3806 | } |
| 3807 | } |
| 3808 | |
| 3809 | /* Now we know that window's parent is a vertical combination |
| 3810 | if we are dividing vertically, or a horizontal combination |
| 3811 | if we are making side-by-side windows */ |
| 3812 | |
| 3813 | windows_or_buffers_changed++; |
| 3814 | FRAME_WINDOW_SIZES_CHANGED (fo) = 1; |
| 3815 | new = make_window (); |
| 3816 | p = XWINDOW (new); |
| 3817 | |
| 3818 | p->frame = o->frame; |
| 3819 | p->next = o->next; |
| 3820 | if (!NILP (p->next)) |
| 3821 | XWINDOW (p->next)->prev = new; |
| 3822 | p->prev = window; |
| 3823 | o->next = new; |
| 3824 | p->parent = o->parent; |
| 3825 | p->buffer = Qt; |
| 3826 | p->window_end_valid = Qnil; |
| 3827 | bzero (&p->last_cursor, sizeof p->last_cursor); |
| 3828 | |
| 3829 | /* Duplicate special geometry settings. */ |
| 3830 | |
| 3831 | p->left_margin_cols = o->left_margin_cols; |
| 3832 | p->right_margin_cols = o->right_margin_cols; |
| 3833 | p->left_fringe_width = o->left_fringe_width; |
| 3834 | p->right_fringe_width = o->right_fringe_width; |
| 3835 | p->fringes_outside_margins = o->fringes_outside_margins; |
| 3836 | p->scroll_bar_width = o->scroll_bar_width; |
| 3837 | p->vertical_scroll_bar_type = o->vertical_scroll_bar_type; |
| 3838 | |
| 3839 | /* Apportion the available frame space among the two new windows */ |
| 3840 | |
| 3841 | if (!NILP (horflag)) |
| 3842 | { |
| 3843 | p->total_lines = o->total_lines; |
| 3844 | p->top_line = o->top_line; |
| 3845 | XSETFASTINT (p->total_cols, XFASTINT (o->total_cols) - size_int); |
| 3846 | XSETFASTINT (o->total_cols, size_int); |
| 3847 | XSETFASTINT (p->left_col, XFASTINT (o->left_col) + size_int); |
| 3848 | adjust_window_margins (p); |
| 3849 | adjust_window_margins (o); |
| 3850 | } |
| 3851 | else |
| 3852 | { |
| 3853 | p->left_col = o->left_col; |
| 3854 | p->total_cols = o->total_cols; |
| 3855 | XSETFASTINT (p->total_lines, XFASTINT (o->total_lines) - size_int); |
| 3856 | XSETFASTINT (o->total_lines, size_int); |
| 3857 | XSETFASTINT (p->top_line, XFASTINT (o->top_line) + size_int); |
| 3858 | } |
| 3859 | |
| 3860 | /* Adjust glyph matrices. */ |
| 3861 | adjust_glyphs (fo); |
| 3862 | |
| 3863 | Fset_window_buffer (new, o->buffer, Qt); |
| 3864 | return new; |
| 3865 | } |
| 3866 | \f |
| 3867 | DEFUN ("enlarge-window", Fenlarge_window, Senlarge_window, 1, 3, "p", |
| 3868 | doc: /* Make current window ARG lines bigger. |
| 3869 | From program, optional second arg non-nil means grow sideways ARG columns. |
| 3870 | Interactively, if an argument is not given, make the window one line bigger. |
| 3871 | |
| 3872 | Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size |
| 3873 | of the siblings above or to the left of the selected window. Only |
| 3874 | siblings to the right or below are changed. */) |
| 3875 | (arg, side, preserve_before) |
| 3876 | register Lisp_Object arg, side, preserve_before; |
| 3877 | { |
| 3878 | CHECK_NUMBER (arg); |
| 3879 | enlarge_window (selected_window, XINT (arg), !NILP (side), |
| 3880 | !NILP (preserve_before)); |
| 3881 | |
| 3882 | if (! NILP (Vwindow_configuration_change_hook)) |
| 3883 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 3884 | |
| 3885 | return Qnil; |
| 3886 | } |
| 3887 | |
| 3888 | DEFUN ("shrink-window", Fshrink_window, Sshrink_window, 1, 3, "p", |
| 3889 | doc: /* Make current window ARG lines smaller. |
| 3890 | From program, optional second arg non-nil means shrink sideways arg columns. |
| 3891 | Interactively, if an argument is not given, make the window one line smaller. |
| 3892 | |
| 3893 | Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size |
| 3894 | of the siblings above or to the left of the selected window. Only |
| 3895 | siblings to the right or below are changed. */) |
| 3896 | (arg, side, preserve_before) |
| 3897 | register Lisp_Object arg, side, preserve_before; |
| 3898 | { |
| 3899 | CHECK_NUMBER (arg); |
| 3900 | enlarge_window (selected_window, -XINT (arg), !NILP (side), |
| 3901 | !NILP (preserve_before)); |
| 3902 | |
| 3903 | if (! NILP (Vwindow_configuration_change_hook)) |
| 3904 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 3905 | |
| 3906 | return Qnil; |
| 3907 | } |
| 3908 | |
| 3909 | int |
| 3910 | window_height (window) |
| 3911 | Lisp_Object window; |
| 3912 | { |
| 3913 | register struct window *p = XWINDOW (window); |
| 3914 | return WINDOW_TOTAL_LINES (p); |
| 3915 | } |
| 3916 | |
| 3917 | int |
| 3918 | window_width (window) |
| 3919 | Lisp_Object window; |
| 3920 | { |
| 3921 | register struct window *p = XWINDOW (window); |
| 3922 | return WINDOW_TOTAL_COLS (p); |
| 3923 | } |
| 3924 | |
| 3925 | |
| 3926 | #define CURBEG(w) \ |
| 3927 | *(widthflag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line)) |
| 3928 | |
| 3929 | #define CURSIZE(w) \ |
| 3930 | *(widthflag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines)) |
| 3931 | |
| 3932 | |
| 3933 | /* Enlarge WINDOW by DELTA. WIDTHFLAG non-zero means |
| 3934 | increase its width. Siblings of the selected window are resized to |
| 3935 | fulfill the size request. If they become too small in the process, |
| 3936 | they will be deleted. |
| 3937 | |
| 3938 | If PRESERVE_BEFORE is nonzero, that means don't alter |
| 3939 | the siblings to the left or above WINDOW. */ |
| 3940 | |
| 3941 | static void |
| 3942 | enlarge_window (window, delta, widthflag, preserve_before) |
| 3943 | Lisp_Object window; |
| 3944 | int delta, widthflag, preserve_before; |
| 3945 | { |
| 3946 | Lisp_Object parent, next, prev; |
| 3947 | struct window *p; |
| 3948 | Lisp_Object *sizep; |
| 3949 | int maximum; |
| 3950 | int (*sizefun) P_ ((Lisp_Object)) |
| 3951 | = widthflag ? window_width : window_height; |
| 3952 | void (*setsizefun) P_ ((Lisp_Object, int, int)) |
| 3953 | = (widthflag ? set_window_width : set_window_height); |
| 3954 | |
| 3955 | /* Check values of window_min_width and window_min_height for |
| 3956 | validity. */ |
| 3957 | check_min_window_sizes (); |
| 3958 | |
| 3959 | /* Give up if this window cannot be resized. */ |
| 3960 | if (window_fixed_size_p (XWINDOW (window), widthflag, 1)) |
| 3961 | error ("Window is not resizable"); |
| 3962 | |
| 3963 | /* Find the parent of the selected window. */ |
| 3964 | while (1) |
| 3965 | { |
| 3966 | p = XWINDOW (window); |
| 3967 | parent = p->parent; |
| 3968 | |
| 3969 | if (NILP (parent)) |
| 3970 | { |
| 3971 | if (widthflag) |
| 3972 | error ("No other window to side of this one"); |
| 3973 | break; |
| 3974 | } |
| 3975 | |
| 3976 | if (widthflag |
| 3977 | ? !NILP (XWINDOW (parent)->hchild) |
| 3978 | : !NILP (XWINDOW (parent)->vchild)) |
| 3979 | break; |
| 3980 | |
| 3981 | window = parent; |
| 3982 | } |
| 3983 | |
| 3984 | sizep = &CURSIZE (window); |
| 3985 | |
| 3986 | { |
| 3987 | register int maxdelta; |
| 3988 | |
| 3989 | /* Compute the maximum size increment this window can have. */ |
| 3990 | |
| 3991 | if (preserve_before) |
| 3992 | { |
| 3993 | if (!NILP (parent)) |
| 3994 | { |
| 3995 | maxdelta = (*sizefun) (parent) - XINT (*sizep); |
| 3996 | /* Subtract size of siblings before, since we can't take that. */ |
| 3997 | maxdelta -= XINT (CURBEG (window)) - XINT (CURBEG (parent)); |
| 3998 | } |
| 3999 | else |
| 4000 | maxdelta = (!NILP (p->next) ? ((*sizefun) (p->next) |
| 4001 | - window_min_size (XWINDOW (p->next), |
| 4002 | widthflag, 0, 0)) |
| 4003 | : (delta = 0)); |
| 4004 | } |
| 4005 | else |
| 4006 | maxdelta = (!NILP (parent) ? (*sizefun) (parent) - XINT (*sizep) |
| 4007 | /* This is a main window followed by a minibuffer. */ |
| 4008 | : !NILP (p->next) ? ((*sizefun) (p->next) |
| 4009 | - window_min_size (XWINDOW (p->next), |
| 4010 | widthflag, 0, 0)) |
| 4011 | /* This is a minibuffer following a main window. */ |
| 4012 | : !NILP (p->prev) ? ((*sizefun) (p->prev) |
| 4013 | - window_min_size (XWINDOW (p->prev), |
| 4014 | widthflag, 0, 0)) |
| 4015 | /* This is a frame with only one window, a minibuffer-only |
| 4016 | or a minibufferless frame. */ |
| 4017 | : (delta = 0)); |
| 4018 | |
| 4019 | if (delta > maxdelta) |
| 4020 | /* This case traps trying to make the minibuffer |
| 4021 | the full frame, or make the only window aside from the |
| 4022 | minibuffer the full frame. */ |
| 4023 | delta = maxdelta; |
| 4024 | } |
| 4025 | |
| 4026 | if (XINT (*sizep) + delta < window_min_size (XWINDOW (window), widthflag, 0, 0)) |
| 4027 | { |
| 4028 | delete_window (window); |
| 4029 | return; |
| 4030 | } |
| 4031 | |
| 4032 | if (delta == 0) |
| 4033 | return; |
| 4034 | |
| 4035 | /* Find the total we can get from other siblings without deleting them. */ |
| 4036 | maximum = 0; |
| 4037 | for (next = p->next; ! NILP (next); next = XWINDOW (next)->next) |
| 4038 | maximum += (*sizefun) (next) - window_min_size (XWINDOW (next), |
| 4039 | widthflag, 0, 0); |
| 4040 | if (! preserve_before) |
| 4041 | for (prev = p->prev; ! NILP (prev); prev = XWINDOW (prev)->prev) |
| 4042 | maximum += (*sizefun) (prev) - window_min_size (XWINDOW (prev), |
| 4043 | widthflag, 0, 0); |
| 4044 | |
| 4045 | /* If we can get it all from them without deleting them, do so. */ |
| 4046 | if (delta <= maximum) |
| 4047 | { |
| 4048 | Lisp_Object first_unaffected; |
| 4049 | Lisp_Object first_affected; |
| 4050 | int fixed_p; |
| 4051 | |
| 4052 | next = p->next; |
| 4053 | prev = p->prev; |
| 4054 | first_affected = window; |
| 4055 | /* Look at one sibling at a time, |
| 4056 | moving away from this window in both directions alternately, |
| 4057 | and take as much as we can get without deleting that sibling. */ |
| 4058 | while (delta != 0 |
| 4059 | && (!NILP (next) || (!preserve_before && !NILP (prev)))) |
| 4060 | { |
| 4061 | if (! NILP (next)) |
| 4062 | { |
| 4063 | int this_one = ((*sizefun) (next) |
| 4064 | - window_min_size (XWINDOW (next), |
| 4065 | widthflag, 0, &fixed_p)); |
| 4066 | if (!fixed_p) |
| 4067 | { |
| 4068 | if (this_one > delta) |
| 4069 | this_one = delta; |
| 4070 | |
| 4071 | (*setsizefun) (next, (*sizefun) (next) - this_one, 0); |
| 4072 | (*setsizefun) (window, XINT (*sizep) + this_one, 0); |
| 4073 | |
| 4074 | delta -= this_one; |
| 4075 | } |
| 4076 | |
| 4077 | next = XWINDOW (next)->next; |
| 4078 | } |
| 4079 | |
| 4080 | if (delta == 0) |
| 4081 | break; |
| 4082 | |
| 4083 | if (!preserve_before && ! NILP (prev)) |
| 4084 | { |
| 4085 | int this_one = ((*sizefun) (prev) |
| 4086 | - window_min_size (XWINDOW (prev), |
| 4087 | widthflag, 0, &fixed_p)); |
| 4088 | if (!fixed_p) |
| 4089 | { |
| 4090 | if (this_one > delta) |
| 4091 | this_one = delta; |
| 4092 | |
| 4093 | first_affected = prev; |
| 4094 | |
| 4095 | (*setsizefun) (prev, (*sizefun) (prev) - this_one, 0); |
| 4096 | (*setsizefun) (window, XINT (*sizep) + this_one, 0); |
| 4097 | |
| 4098 | delta -= this_one; |
| 4099 | } |
| 4100 | |
| 4101 | prev = XWINDOW (prev)->prev; |
| 4102 | } |
| 4103 | } |
| 4104 | |
| 4105 | xassert (delta == 0); |
| 4106 | |
| 4107 | /* Now recalculate the edge positions of all the windows affected, |
| 4108 | based on the new sizes. */ |
| 4109 | first_unaffected = next; |
| 4110 | prev = first_affected; |
| 4111 | for (next = XWINDOW (prev)->next; ! EQ (next, first_unaffected); |
| 4112 | prev = next, next = XWINDOW (next)->next) |
| 4113 | { |
| 4114 | XSETINT (CURBEG (next), XINT (CURBEG (prev)) + (*sizefun) (prev)); |
| 4115 | /* This does not change size of NEXT, |
| 4116 | but it propagates the new top edge to its children */ |
| 4117 | (*setsizefun) (next, (*sizefun) (next), 0); |
| 4118 | } |
| 4119 | } |
| 4120 | else |
| 4121 | { |
| 4122 | register int delta1; |
| 4123 | register int opht = (*sizefun) (parent); |
| 4124 | |
| 4125 | if (opht <= XINT (*sizep) + delta) |
| 4126 | { |
| 4127 | /* If trying to grow this window to or beyond size of the parent, |
| 4128 | just delete all the sibling windows. */ |
| 4129 | Lisp_Object start, tem, next; |
| 4130 | |
| 4131 | start = XWINDOW (parent)->vchild; |
| 4132 | if (NILP (start)) |
| 4133 | start = XWINDOW (parent)->hchild; |
| 4134 | |
| 4135 | /* Delete any siblings that come after WINDOW. */ |
| 4136 | tem = XWINDOW (window)->next; |
| 4137 | while (! NILP (tem)) |
| 4138 | { |
| 4139 | next = XWINDOW (tem)->next; |
| 4140 | delete_window (tem); |
| 4141 | tem = next; |
| 4142 | } |
| 4143 | |
| 4144 | /* Delete any siblings that come after WINDOW. |
| 4145 | Note that if START is not WINDOW, then WINDOW still |
| 4146 | Fhas siblings, so WINDOW has not yet replaced its parent. */ |
| 4147 | tem = start; |
| 4148 | while (! EQ (tem, window)) |
| 4149 | { |
| 4150 | next = XWINDOW (tem)->next; |
| 4151 | delete_window (tem); |
| 4152 | tem = next; |
| 4153 | } |
| 4154 | } |
| 4155 | else |
| 4156 | { |
| 4157 | /* Otherwise, make delta1 just right so that if we add |
| 4158 | delta1 lines to this window and to the parent, and then |
| 4159 | shrink the parent back to its original size, the new |
| 4160 | proportional size of this window will increase by delta. |
| 4161 | |
| 4162 | The function size_window will compute the new height h' |
| 4163 | of the window from delta1 as: |
| 4164 | |
| 4165 | e = delta1/n |
| 4166 | x = delta1 - delta1/n * n for the 1st resizable child |
| 4167 | h' = h + e + x |
| 4168 | |
| 4169 | where n is the number of children that can be resized. |
| 4170 | We can ignore x by choosing a delta1 that is a multiple of |
| 4171 | n. We want the height of this window to come out as |
| 4172 | |
| 4173 | h' = h + delta |
| 4174 | |
| 4175 | So, delta1 must be |
| 4176 | |
| 4177 | h + e = h + delta |
| 4178 | delta1/n = delta |
| 4179 | delta1 = n * delta. |
| 4180 | |
| 4181 | The number of children n equals the number of resizable |
| 4182 | children of this window + 1 because we know window itself |
| 4183 | is resizable (otherwise we would have signalled an error). */ |
| 4184 | |
| 4185 | struct window *w = XWINDOW (window); |
| 4186 | Lisp_Object s; |
| 4187 | int n = 1; |
| 4188 | |
| 4189 | for (s = w->next; !NILP (s); s = XWINDOW (s)->next) |
| 4190 | if (!window_fixed_size_p (XWINDOW (s), widthflag, 0)) |
| 4191 | ++n; |
| 4192 | for (s = w->prev; !NILP (s); s = XWINDOW (s)->prev) |
| 4193 | if (!window_fixed_size_p (XWINDOW (s), widthflag, 0)) |
| 4194 | ++n; |
| 4195 | |
| 4196 | delta1 = n * delta; |
| 4197 | |
| 4198 | /* Add delta1 lines or columns to this window, and to the parent, |
| 4199 | keeping things consistent while not affecting siblings. */ |
| 4200 | XSETINT (CURSIZE (parent), opht + delta1); |
| 4201 | (*setsizefun) (window, XINT (*sizep) + delta1, 0); |
| 4202 | |
| 4203 | /* Squeeze out delta1 lines or columns from our parent, |
| 4204 | shriking this window and siblings proportionately. |
| 4205 | This brings parent back to correct size. |
| 4206 | Delta1 was calculated so this makes this window the desired size, |
| 4207 | taking it all out of the siblings. */ |
| 4208 | (*setsizefun) (parent, opht, 0); |
| 4209 | |
| 4210 | } |
| 4211 | } |
| 4212 | |
| 4213 | XSETFASTINT (p->last_modified, 0); |
| 4214 | XSETFASTINT (p->last_overlay_modified, 0); |
| 4215 | |
| 4216 | /* Adjust glyph matrices. */ |
| 4217 | adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window)))); |
| 4218 | } |
| 4219 | |
| 4220 | #undef CURBEG |
| 4221 | #undef CURSIZE |
| 4222 | |
| 4223 | |
| 4224 | \f |
| 4225 | /*********************************************************************** |
| 4226 | Resizing Mini-Windows |
| 4227 | ***********************************************************************/ |
| 4228 | |
| 4229 | static void shrink_window_lowest_first P_ ((struct window *, int)); |
| 4230 | |
| 4231 | enum save_restore_action |
| 4232 | { |
| 4233 | CHECK_ORIG_SIZES, |
| 4234 | SAVE_ORIG_SIZES, |
| 4235 | RESTORE_ORIG_SIZES |
| 4236 | }; |
| 4237 | |
| 4238 | static int save_restore_orig_size P_ ((struct window *, |
| 4239 | enum save_restore_action)); |
| 4240 | |
| 4241 | /* Shrink windows rooted in window W to HEIGHT. Take the space needed |
| 4242 | from lowest windows first. */ |
| 4243 | |
| 4244 | static void |
| 4245 | shrink_window_lowest_first (w, height) |
| 4246 | struct window *w; |
| 4247 | int height; |
| 4248 | { |
| 4249 | struct window *c; |
| 4250 | Lisp_Object child; |
| 4251 | int old_height; |
| 4252 | |
| 4253 | xassert (!MINI_WINDOW_P (w)); |
| 4254 | |
| 4255 | /* Set redisplay hints. */ |
| 4256 | XSETFASTINT (w->last_modified, 0); |
| 4257 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4258 | windows_or_buffers_changed++; |
| 4259 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1; |
| 4260 | |
| 4261 | old_height = XFASTINT (w->total_lines); |
| 4262 | XSETFASTINT (w->total_lines, height); |
| 4263 | |
| 4264 | if (!NILP (w->hchild)) |
| 4265 | { |
| 4266 | for (child = w->hchild; !NILP (child); child = c->next) |
| 4267 | { |
| 4268 | c = XWINDOW (child); |
| 4269 | c->top_line = w->top_line; |
| 4270 | shrink_window_lowest_first (c, height); |
| 4271 | } |
| 4272 | } |
| 4273 | else if (!NILP (w->vchild)) |
| 4274 | { |
| 4275 | Lisp_Object last_child; |
| 4276 | int delta = old_height - height; |
| 4277 | int last_top; |
| 4278 | |
| 4279 | last_child = Qnil; |
| 4280 | |
| 4281 | /* Find the last child. We are taking space from lowest windows |
| 4282 | first, so we iterate over children from the last child |
| 4283 | backwards. */ |
| 4284 | for (child = w->vchild; !NILP (child); child = XWINDOW (child)->next) |
| 4285 | last_child = child; |
| 4286 | |
| 4287 | /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */ |
| 4288 | for (child = last_child; delta && !NILP (child); child = c->prev) |
| 4289 | { |
| 4290 | int this_one; |
| 4291 | |
| 4292 | c = XWINDOW (child); |
| 4293 | this_one = XFASTINT (c->total_lines) - MIN_SAFE_WINDOW_HEIGHT; |
| 4294 | |
| 4295 | if (this_one > delta) |
| 4296 | this_one = delta; |
| 4297 | |
| 4298 | shrink_window_lowest_first (c, XFASTINT (c->total_lines) - this_one); |
| 4299 | delta -= this_one; |
| 4300 | } |
| 4301 | |
| 4302 | /* Compute new positions. */ |
| 4303 | last_top = XINT (w->top_line); |
| 4304 | for (child = w->vchild; !NILP (child); child = c->next) |
| 4305 | { |
| 4306 | c = XWINDOW (child); |
| 4307 | c->top_line = make_number (last_top); |
| 4308 | shrink_window_lowest_first (c, XFASTINT (c->total_lines)); |
| 4309 | last_top += XFASTINT (c->total_lines); |
| 4310 | } |
| 4311 | } |
| 4312 | } |
| 4313 | |
| 4314 | |
| 4315 | /* Save, restore, or check positions and sizes in the window tree |
| 4316 | rooted at W. ACTION says what to do. |
| 4317 | |
| 4318 | If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and |
| 4319 | orig_total_lines members are valid for all windows in the window |
| 4320 | tree. Value is non-zero if they are valid. |
| 4321 | |
| 4322 | If ACTION is SAVE_ORIG_SIZES, save members top and height in |
| 4323 | orig_top_line and orig_total_lines for all windows in the tree. |
| 4324 | |
| 4325 | If ACTION is RESTORE_ORIG_SIZES, restore top and height from values |
| 4326 | stored in orig_top_line and orig_total_lines for all windows. */ |
| 4327 | |
| 4328 | static int |
| 4329 | save_restore_orig_size (w, action) |
| 4330 | struct window *w; |
| 4331 | enum save_restore_action action; |
| 4332 | { |
| 4333 | int success_p = 1; |
| 4334 | |
| 4335 | while (w) |
| 4336 | { |
| 4337 | if (!NILP (w->hchild)) |
| 4338 | { |
| 4339 | if (!save_restore_orig_size (XWINDOW (w->hchild), action)) |
| 4340 | success_p = 0; |
| 4341 | } |
| 4342 | else if (!NILP (w->vchild)) |
| 4343 | { |
| 4344 | if (!save_restore_orig_size (XWINDOW (w->vchild), action)) |
| 4345 | success_p = 0; |
| 4346 | } |
| 4347 | |
| 4348 | switch (action) |
| 4349 | { |
| 4350 | case CHECK_ORIG_SIZES: |
| 4351 | if (!INTEGERP (w->orig_top_line) || !INTEGERP (w->orig_total_lines)) |
| 4352 | return 0; |
| 4353 | break; |
| 4354 | |
| 4355 | case SAVE_ORIG_SIZES: |
| 4356 | w->orig_top_line = w->top_line; |
| 4357 | w->orig_total_lines = w->total_lines; |
| 4358 | XSETFASTINT (w->last_modified, 0); |
| 4359 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4360 | break; |
| 4361 | |
| 4362 | case RESTORE_ORIG_SIZES: |
| 4363 | xassert (INTEGERP (w->orig_top_line) && INTEGERP (w->orig_total_lines)); |
| 4364 | w->top_line = w->orig_top_line; |
| 4365 | w->total_lines = w->orig_total_lines; |
| 4366 | w->orig_total_lines = w->orig_top_line = Qnil; |
| 4367 | XSETFASTINT (w->last_modified, 0); |
| 4368 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4369 | break; |
| 4370 | |
| 4371 | default: |
| 4372 | abort (); |
| 4373 | } |
| 4374 | |
| 4375 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
| 4376 | } |
| 4377 | |
| 4378 | return success_p; |
| 4379 | } |
| 4380 | |
| 4381 | |
| 4382 | /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can |
| 4383 | without deleting other windows. */ |
| 4384 | |
| 4385 | void |
| 4386 | grow_mini_window (w, delta) |
| 4387 | struct window *w; |
| 4388 | int delta; |
| 4389 | { |
| 4390 | struct frame *f = XFRAME (w->frame); |
| 4391 | struct window *root; |
| 4392 | |
| 4393 | xassert (MINI_WINDOW_P (w)); |
| 4394 | xassert (delta >= 0); |
| 4395 | |
| 4396 | /* Check values of window_min_width and window_min_height for |
| 4397 | validity. */ |
| 4398 | check_min_window_sizes (); |
| 4399 | |
| 4400 | /* Compute how much we can enlarge the mini-window without deleting |
| 4401 | other windows. */ |
| 4402 | root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 4403 | if (delta) |
| 4404 | { |
| 4405 | int min_height = window_min_size (root, 0, 0, 0); |
| 4406 | if (XFASTINT (root->total_lines) - delta < min_height) |
| 4407 | /* Note that the root window may already be smaller than |
| 4408 | min_height. */ |
| 4409 | delta = max (0, XFASTINT (root->total_lines) - min_height); |
| 4410 | } |
| 4411 | |
| 4412 | if (delta) |
| 4413 | { |
| 4414 | /* Save original window sizes and positions, if not already done. */ |
| 4415 | if (!save_restore_orig_size (root, CHECK_ORIG_SIZES)) |
| 4416 | save_restore_orig_size (root, SAVE_ORIG_SIZES); |
| 4417 | |
| 4418 | /* Shrink other windows. */ |
| 4419 | shrink_window_lowest_first (root, XFASTINT (root->total_lines) - delta); |
| 4420 | |
| 4421 | /* Grow the mini-window. */ |
| 4422 | w->top_line = make_number (XFASTINT (root->top_line) + XFASTINT (root->total_lines)); |
| 4423 | w->total_lines = make_number (XFASTINT (w->total_lines) + delta); |
| 4424 | XSETFASTINT (w->last_modified, 0); |
| 4425 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4426 | |
| 4427 | adjust_glyphs (f); |
| 4428 | } |
| 4429 | } |
| 4430 | |
| 4431 | |
| 4432 | /* Shrink mini-window W. If there is recorded info about window sizes |
| 4433 | before a call to grow_mini_window, restore recorded window sizes. |
| 4434 | Otherwise, if the mini-window is higher than 1 line, resize it to 1 |
| 4435 | line. */ |
| 4436 | |
| 4437 | void |
| 4438 | shrink_mini_window (w) |
| 4439 | struct window *w; |
| 4440 | { |
| 4441 | struct frame *f = XFRAME (w->frame); |
| 4442 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 4443 | |
| 4444 | if (save_restore_orig_size (root, CHECK_ORIG_SIZES)) |
| 4445 | { |
| 4446 | save_restore_orig_size (root, RESTORE_ORIG_SIZES); |
| 4447 | adjust_glyphs (f); |
| 4448 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 4449 | windows_or_buffers_changed = 1; |
| 4450 | } |
| 4451 | else if (XFASTINT (w->total_lines) > 1) |
| 4452 | { |
| 4453 | /* Distribute the additional lines of the mini-window |
| 4454 | among the other windows. */ |
| 4455 | Lisp_Object window; |
| 4456 | XSETWINDOW (window, w); |
| 4457 | enlarge_window (window, 1 - XFASTINT (w->total_lines), 0, 0); |
| 4458 | } |
| 4459 | } |
| 4460 | |
| 4461 | |
| 4462 | \f |
| 4463 | /* Mark window cursors off for all windows in the window tree rooted |
| 4464 | at W by setting their phys_cursor_on_p flag to zero. Called from |
| 4465 | xterm.c, e.g. when a frame is cleared and thereby all cursors on |
| 4466 | the frame are cleared. */ |
| 4467 | |
| 4468 | void |
| 4469 | mark_window_cursors_off (w) |
| 4470 | struct window *w; |
| 4471 | { |
| 4472 | while (w) |
| 4473 | { |
| 4474 | if (!NILP (w->hchild)) |
| 4475 | mark_window_cursors_off (XWINDOW (w->hchild)); |
| 4476 | else if (!NILP (w->vchild)) |
| 4477 | mark_window_cursors_off (XWINDOW (w->vchild)); |
| 4478 | else |
| 4479 | w->phys_cursor_on_p = 0; |
| 4480 | |
| 4481 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 4482 | } |
| 4483 | } |
| 4484 | |
| 4485 | |
| 4486 | /* Return number of lines of text (not counting mode lines) in W. */ |
| 4487 | |
| 4488 | int |
| 4489 | window_internal_height (w) |
| 4490 | struct window *w; |
| 4491 | { |
| 4492 | int ht = XFASTINT (w->total_lines); |
| 4493 | |
| 4494 | if (!MINI_WINDOW_P (w)) |
| 4495 | { |
| 4496 | if (!NILP (w->parent) |
| 4497 | || !NILP (w->vchild) |
| 4498 | || !NILP (w->hchild) |
| 4499 | || !NILP (w->next) |
| 4500 | || !NILP (w->prev) |
| 4501 | || WINDOW_WANTS_MODELINE_P (w)) |
| 4502 | --ht; |
| 4503 | |
| 4504 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
| 4505 | --ht; |
| 4506 | } |
| 4507 | |
| 4508 | return ht; |
| 4509 | } |
| 4510 | |
| 4511 | |
| 4512 | /* Return the number of columns in W. |
| 4513 | Don't count columns occupied by scroll bars or the vertical bar |
| 4514 | separating W from the sibling to its right. */ |
| 4515 | |
| 4516 | int |
| 4517 | window_box_text_cols (w) |
| 4518 | struct window *w; |
| 4519 | { |
| 4520 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 4521 | int width = XINT (w->total_cols); |
| 4522 | |
| 4523 | if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w)) |
| 4524 | /* Scroll bars occupy a few columns. */ |
| 4525 | width -= WINDOW_CONFIG_SCROLL_BAR_COLS (w); |
| 4526 | else if (!FRAME_WINDOW_P (f) |
| 4527 | && !WINDOW_RIGHTMOST_P (w) && !WINDOW_FULL_WIDTH_P (w)) |
| 4528 | /* The column of `|' characters separating side-by-side windows |
| 4529 | occupies one column only. */ |
| 4530 | width -= 1; |
| 4531 | |
| 4532 | if (FRAME_WINDOW_P (f)) |
| 4533 | /* On window-systems, fringes and display margins cannot be |
| 4534 | used for normal text. */ |
| 4535 | width -= (WINDOW_FRINGE_COLS (w) |
| 4536 | + WINDOW_LEFT_MARGIN_COLS (w) |
| 4537 | + WINDOW_RIGHT_MARGIN_COLS (w)); |
| 4538 | |
| 4539 | return width; |
| 4540 | } |
| 4541 | |
| 4542 | \f |
| 4543 | /************************************************************************ |
| 4544 | Window Scrolling |
| 4545 | ***********************************************************************/ |
| 4546 | |
| 4547 | /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll |
| 4548 | N screen-fulls, which is defined as the height of the window minus |
| 4549 | next_screen_context_lines. If WHOLE is zero, scroll up N lines |
| 4550 | instead. Negative values of N mean scroll down. NOERROR non-zero |
| 4551 | means don't signal an error if we try to move over BEGV or ZV, |
| 4552 | respectively. */ |
| 4553 | |
| 4554 | static void |
| 4555 | window_scroll (window, n, whole, noerror) |
| 4556 | Lisp_Object window; |
| 4557 | int n; |
| 4558 | int whole; |
| 4559 | int noerror; |
| 4560 | { |
| 4561 | immediate_quit = 1; |
| 4562 | |
| 4563 | /* If we must, use the pixel-based version which is much slower than |
| 4564 | the line-based one but can handle varying line heights. */ |
| 4565 | if (FRAME_WINDOW_P (XFRAME (XWINDOW (window)->frame))) |
| 4566 | window_scroll_pixel_based (window, n, whole, noerror); |
| 4567 | else |
| 4568 | window_scroll_line_based (window, n, whole, noerror); |
| 4569 | |
| 4570 | immediate_quit = 0; |
| 4571 | } |
| 4572 | |
| 4573 | |
| 4574 | /* Implementation of window_scroll that works based on pixel line |
| 4575 | heights. See the comment of window_scroll for parameter |
| 4576 | descriptions. */ |
| 4577 | |
| 4578 | static void |
| 4579 | window_scroll_pixel_based (window, n, whole, noerror) |
| 4580 | Lisp_Object window; |
| 4581 | int n; |
| 4582 | int whole; |
| 4583 | int noerror; |
| 4584 | { |
| 4585 | struct it it; |
| 4586 | struct window *w = XWINDOW (window); |
| 4587 | struct text_pos start; |
| 4588 | Lisp_Object tem; |
| 4589 | int this_scroll_margin; |
| 4590 | int preserve_y; |
| 4591 | /* True if we fiddled the window vscroll field without really scrolling. */ |
| 4592 | int vscrolled = 0; |
| 4593 | |
| 4594 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 4595 | |
| 4596 | /* If PT is not visible in WINDOW, move back one half of |
| 4597 | the screen. Allow PT to be partially visible, otherwise |
| 4598 | something like (scroll-down 1) with PT in the line before |
| 4599 | the partially visible one would recenter. */ |
| 4600 | tem = Fpos_visible_in_window_p (make_number (PT), window, Qt); |
| 4601 | if (NILP (tem)) |
| 4602 | { |
| 4603 | /* Move backward half the height of the window. Performance note: |
| 4604 | vmotion used here is about 10% faster, but would give wrong |
| 4605 | results for variable height lines. */ |
| 4606 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); |
| 4607 | it.current_y = it.last_visible_y; |
| 4608 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
| 4609 | |
| 4610 | /* The function move_iterator_vertically may move over more than |
| 4611 | the specified y-distance. If it->w is small, e.g. a |
| 4612 | mini-buffer window, we may end up in front of the window's |
| 4613 | display area. This is the case when Start displaying at the |
| 4614 | start of the line containing PT in this case. */ |
| 4615 | if (it.current_y <= 0) |
| 4616 | { |
| 4617 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); |
| 4618 | move_it_vertically_backward (&it, 0); |
| 4619 | it.current_y = 0; |
| 4620 | } |
| 4621 | |
| 4622 | start = it.current.pos; |
| 4623 | } |
| 4624 | else if (auto_window_vscroll_p) |
| 4625 | { |
| 4626 | if (tem = XCAR (XCDR (XCDR (tem))), CONSP (tem)) |
| 4627 | { |
| 4628 | int px; |
| 4629 | int dy = WINDOW_FRAME_LINE_HEIGHT (w); |
| 4630 | if (whole) |
| 4631 | dy = max ((window_box_height (w) |
| 4632 | - next_screen_context_lines * dy), |
| 4633 | dy); |
| 4634 | dy *= n; |
| 4635 | |
| 4636 | if (n < 0 && (px = XINT (XCAR (tem))) > 0) |
| 4637 | { |
| 4638 | px = max (0, -w->vscroll - min (px, -dy)); |
| 4639 | Fset_window_vscroll (window, make_number (px), Qt); |
| 4640 | return; |
| 4641 | } |
| 4642 | if (n > 0 && (px = XINT (XCDR (tem))) > 0) |
| 4643 | { |
| 4644 | px = max (0, -w->vscroll + min (px, dy)); |
| 4645 | Fset_window_vscroll (window, make_number (px), Qt); |
| 4646 | return; |
| 4647 | } |
| 4648 | } |
| 4649 | Fset_window_vscroll (window, make_number (0), Qt); |
| 4650 | } |
| 4651 | |
| 4652 | /* If scroll_preserve_screen_position is non-nil, we try to set |
| 4653 | point in the same window line as it is now, so get that line. */ |
| 4654 | if (!NILP (Vscroll_preserve_screen_position)) |
| 4655 | { |
| 4656 | start_display (&it, w, start); |
| 4657 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); |
| 4658 | preserve_y = it.current_y; |
| 4659 | } |
| 4660 | else |
| 4661 | preserve_y = -1; |
| 4662 | |
| 4663 | /* Move iterator it from start the specified distance forward or |
| 4664 | backward. The result is the new window start. */ |
| 4665 | start_display (&it, w, start); |
| 4666 | if (whole) |
| 4667 | { |
| 4668 | int start_pos = IT_CHARPOS (it); |
| 4669 | int dy = WINDOW_FRAME_LINE_HEIGHT (w); |
| 4670 | dy = max ((window_box_height (w) |
| 4671 | - next_screen_context_lines * dy), |
| 4672 | dy) * n; |
| 4673 | |
| 4674 | /* Note that move_it_vertically always moves the iterator to the |
| 4675 | start of a line. So, if the last line doesn't have a newline, |
| 4676 | we would end up at the start of the line ending at ZV. */ |
| 4677 | if (dy <= 0) |
| 4678 | { |
| 4679 | move_it_vertically_backward (&it, -dy); |
| 4680 | /* Ensure we actually does move, e.g. in case we are currently |
| 4681 | looking at an image that is taller that the window height. */ |
| 4682 | while (start_pos == IT_CHARPOS (it) |
| 4683 | && start_pos > BEGV) |
| 4684 | move_it_by_lines (&it, -1, 1); |
| 4685 | } |
| 4686 | else if (dy > 0) |
| 4687 | { |
| 4688 | move_it_to (&it, ZV, -1, it.current_y + dy, -1, |
| 4689 | MOVE_TO_POS | MOVE_TO_Y); |
| 4690 | /* Ensure we actually does move, e.g. in case we are currently |
| 4691 | looking at an image that is taller that the window height. */ |
| 4692 | while (start_pos == IT_CHARPOS (it) |
| 4693 | && start_pos < ZV) |
| 4694 | move_it_by_lines (&it, 1, 1); |
| 4695 | } |
| 4696 | } |
| 4697 | else |
| 4698 | move_it_by_lines (&it, n, 1); |
| 4699 | |
| 4700 | /* We failed if we find ZV is already on the screen (scrolling up, |
| 4701 | means there's nothing past the end), or if we can't start any |
| 4702 | earlier (scrolling down, means there's nothing past the top). */ |
| 4703 | if ((n > 0 && IT_CHARPOS (it) == ZV) |
| 4704 | || (n < 0 && IT_CHARPOS (it) == CHARPOS (start))) |
| 4705 | { |
| 4706 | if (IT_CHARPOS (it) == ZV) |
| 4707 | { |
| 4708 | if (it.current_y < it.last_visible_y |
| 4709 | && (it.current_y + it.max_ascent + it.max_descent |
| 4710 | >= it.last_visible_y)) |
| 4711 | { |
| 4712 | /* The last line was only partially visible, make it fully |
| 4713 | visible. */ |
| 4714 | w->vscroll = (it.last_visible_y |
| 4715 | - it.current_y + it.max_ascent + it.max_descent); |
| 4716 | adjust_glyphs (it.f); |
| 4717 | } |
| 4718 | else if (noerror) |
| 4719 | return; |
| 4720 | else |
| 4721 | Fsignal (Qend_of_buffer, Qnil); |
| 4722 | } |
| 4723 | else |
| 4724 | { |
| 4725 | if (w->vscroll != 0) |
| 4726 | /* The first line was only partially visible, make it fully |
| 4727 | visible. */ |
| 4728 | w->vscroll = 0; |
| 4729 | else if (noerror) |
| 4730 | return; |
| 4731 | else |
| 4732 | Fsignal (Qbeginning_of_buffer, Qnil); |
| 4733 | } |
| 4734 | |
| 4735 | /* If control gets here, then we vscrolled. */ |
| 4736 | |
| 4737 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 4738 | |
| 4739 | /* Don't try to change the window start below. */ |
| 4740 | vscrolled = 1; |
| 4741 | } |
| 4742 | |
| 4743 | if (! vscrolled) |
| 4744 | { |
| 4745 | int pos = IT_CHARPOS (it); |
| 4746 | int bytepos; |
| 4747 | |
| 4748 | /* If in the middle of a multi-glyph character move forward to |
| 4749 | the next character. */ |
| 4750 | if (in_display_vector_p (&it)) |
| 4751 | { |
| 4752 | ++pos; |
| 4753 | move_it_to (&it, pos, -1, -1, -1, MOVE_TO_POS); |
| 4754 | } |
| 4755 | |
| 4756 | /* Set the window start, and set up the window for redisplay. */ |
| 4757 | set_marker_restricted (w->start, make_number (pos), |
| 4758 | w->buffer); |
| 4759 | bytepos = XMARKER (w->start)->bytepos; |
| 4760 | w->start_at_line_beg = ((pos == BEGV || FETCH_BYTE (bytepos - 1) == '\n') |
| 4761 | ? Qt : Qnil); |
| 4762 | w->update_mode_line = Qt; |
| 4763 | XSETFASTINT (w->last_modified, 0); |
| 4764 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4765 | /* Set force_start so that redisplay_window will run the |
| 4766 | window-scroll-functions. */ |
| 4767 | w->force_start = Qt; |
| 4768 | } |
| 4769 | |
| 4770 | /* The rest of this function uses current_y in a nonstandard way, |
| 4771 | not including the height of the header line if any. */ |
| 4772 | it.current_y = it.vpos = 0; |
| 4773 | |
| 4774 | /* Move PT out of scroll margins. |
| 4775 | This code wants current_y to be zero at the window start position |
| 4776 | even if there is a header line. */ |
| 4777 | this_scroll_margin = max (0, scroll_margin); |
| 4778 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->total_lines) / 4); |
| 4779 | this_scroll_margin *= FRAME_LINE_HEIGHT (it.f); |
| 4780 | |
| 4781 | if (n > 0) |
| 4782 | { |
| 4783 | /* We moved the window start towards ZV, so PT may be now |
| 4784 | in the scroll margin at the top. */ |
| 4785 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); |
| 4786 | if (IT_CHARPOS (it) == PT && it.current_y >= this_scroll_margin |
| 4787 | && (NILP (Vscroll_preserve_screen_position) |
| 4788 | || EQ (Vscroll_preserve_screen_position, Qt))) |
| 4789 | /* We found PT at a legitimate height. Leave it alone. */ |
| 4790 | ; |
| 4791 | else if (preserve_y >= 0) |
| 4792 | { |
| 4793 | /* If we have a header line, take account of it. |
| 4794 | This is necessary because we set it.current_y to 0, above. */ |
| 4795 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
| 4796 | preserve_y -= CURRENT_HEADER_LINE_HEIGHT (w); |
| 4797 | |
| 4798 | move_it_to (&it, -1, -1, preserve_y, -1, MOVE_TO_Y); |
| 4799 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4800 | } |
| 4801 | else |
| 4802 | { |
| 4803 | while (it.current_y < this_scroll_margin) |
| 4804 | { |
| 4805 | int prev = it.current_y; |
| 4806 | move_it_by_lines (&it, 1, 1); |
| 4807 | if (prev == it.current_y) |
| 4808 | break; |
| 4809 | } |
| 4810 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4811 | } |
| 4812 | } |
| 4813 | else if (n < 0) |
| 4814 | { |
| 4815 | int charpos, bytepos; |
| 4816 | int partial_p; |
| 4817 | |
| 4818 | /* Save our position, for the preserve_y case. */ |
| 4819 | charpos = IT_CHARPOS (it); |
| 4820 | bytepos = IT_BYTEPOS (it); |
| 4821 | |
| 4822 | /* We moved the window start towards BEGV, so PT may be now |
| 4823 | in the scroll margin at the bottom. */ |
| 4824 | move_it_to (&it, PT, -1, |
| 4825 | (it.last_visible_y - CURRENT_HEADER_LINE_HEIGHT (w) |
| 4826 | - this_scroll_margin - 1), |
| 4827 | -1, |
| 4828 | MOVE_TO_POS | MOVE_TO_Y); |
| 4829 | |
| 4830 | /* Save our position, in case it's correct. */ |
| 4831 | charpos = IT_CHARPOS (it); |
| 4832 | bytepos = IT_BYTEPOS (it); |
| 4833 | |
| 4834 | /* See if point is on a partially visible line at the end. */ |
| 4835 | if (it.what == IT_EOB) |
| 4836 | partial_p = it.current_y + it.ascent + it.descent > it.last_visible_y; |
| 4837 | else |
| 4838 | { |
| 4839 | move_it_by_lines (&it, 1, 1); |
| 4840 | partial_p = it.current_y > it.last_visible_y; |
| 4841 | } |
| 4842 | |
| 4843 | if (charpos == PT && !partial_p |
| 4844 | && (NILP (Vscroll_preserve_screen_position) |
| 4845 | || EQ (Vscroll_preserve_screen_position, Qt))) |
| 4846 | /* We found PT before we found the display margin, so PT is ok. */ |
| 4847 | ; |
| 4848 | else if (preserve_y >= 0) |
| 4849 | { |
| 4850 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 4851 | start_display (&it, w, start); |
| 4852 | #if 0 /* It's wrong to subtract this here |
| 4853 | because we called start_display again |
| 4854 | and did not alter it.current_y this time. */ |
| 4855 | |
| 4856 | /* If we have a header line, take account of it. */ |
| 4857 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
| 4858 | preserve_y -= CURRENT_HEADER_LINE_HEIGHT (w); |
| 4859 | #endif |
| 4860 | |
| 4861 | move_it_to (&it, -1, -1, preserve_y, -1, MOVE_TO_Y); |
| 4862 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4863 | } |
| 4864 | else |
| 4865 | { |
| 4866 | if (partial_p) |
| 4867 | /* The last line was only partially visible, so back up two |
| 4868 | lines to make sure we're on a fully visible line. */ |
| 4869 | { |
| 4870 | move_it_by_lines (&it, -2, 0); |
| 4871 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
| 4872 | } |
| 4873 | else |
| 4874 | /* No, the position we saved is OK, so use it. */ |
| 4875 | SET_PT_BOTH (charpos, bytepos); |
| 4876 | } |
| 4877 | } |
| 4878 | } |
| 4879 | |
| 4880 | |
| 4881 | /* Implementation of window_scroll that works based on screen lines. |
| 4882 | See the comment of window_scroll for parameter descriptions. */ |
| 4883 | |
| 4884 | static void |
| 4885 | window_scroll_line_based (window, n, whole, noerror) |
| 4886 | Lisp_Object window; |
| 4887 | int n; |
| 4888 | int whole; |
| 4889 | int noerror; |
| 4890 | { |
| 4891 | register struct window *w = XWINDOW (window); |
| 4892 | register int opoint = PT, opoint_byte = PT_BYTE; |
| 4893 | register int pos, pos_byte; |
| 4894 | register int ht = window_internal_height (w); |
| 4895 | register Lisp_Object tem; |
| 4896 | int lose; |
| 4897 | Lisp_Object bolp; |
| 4898 | int startpos; |
| 4899 | struct position posit; |
| 4900 | int original_vpos; |
| 4901 | |
| 4902 | /* If scrolling screen-fulls, compute the number of lines to |
| 4903 | scroll from the window's height. */ |
| 4904 | if (whole) |
| 4905 | n *= max (1, ht - next_screen_context_lines); |
| 4906 | |
| 4907 | startpos = marker_position (w->start); |
| 4908 | |
| 4909 | posit = *compute_motion (startpos, 0, 0, 0, |
| 4910 | PT, ht, 0, |
| 4911 | -1, XINT (w->hscroll), |
| 4912 | 0, w); |
| 4913 | original_vpos = posit.vpos; |
| 4914 | |
| 4915 | XSETFASTINT (tem, PT); |
| 4916 | tem = Fpos_visible_in_window_p (tem, window, Qnil); |
| 4917 | |
| 4918 | if (NILP (tem)) |
| 4919 | { |
| 4920 | Fvertical_motion (make_number (- (ht / 2)), window); |
| 4921 | startpos = PT; |
| 4922 | } |
| 4923 | |
| 4924 | SET_PT (startpos); |
| 4925 | lose = n < 0 && PT == BEGV; |
| 4926 | Fvertical_motion (make_number (n), window); |
| 4927 | pos = PT; |
| 4928 | pos_byte = PT_BYTE; |
| 4929 | bolp = Fbolp (); |
| 4930 | SET_PT_BOTH (opoint, opoint_byte); |
| 4931 | |
| 4932 | if (lose) |
| 4933 | { |
| 4934 | if (noerror) |
| 4935 | return; |
| 4936 | else |
| 4937 | Fsignal (Qbeginning_of_buffer, Qnil); |
| 4938 | } |
| 4939 | |
| 4940 | if (pos < ZV) |
| 4941 | { |
| 4942 | int this_scroll_margin = scroll_margin; |
| 4943 | |
| 4944 | /* Don't use a scroll margin that is negative or too large. */ |
| 4945 | if (this_scroll_margin < 0) |
| 4946 | this_scroll_margin = 0; |
| 4947 | |
| 4948 | if (XINT (w->total_lines) < 4 * scroll_margin) |
| 4949 | this_scroll_margin = XINT (w->total_lines) / 4; |
| 4950 | |
| 4951 | set_marker_restricted_both (w->start, w->buffer, pos, pos_byte); |
| 4952 | w->start_at_line_beg = bolp; |
| 4953 | w->update_mode_line = Qt; |
| 4954 | XSETFASTINT (w->last_modified, 0); |
| 4955 | XSETFASTINT (w->last_overlay_modified, 0); |
| 4956 | /* Set force_start so that redisplay_window will run |
| 4957 | the window-scroll-functions. */ |
| 4958 | w->force_start = Qt; |
| 4959 | |
| 4960 | if (!NILP (Vscroll_preserve_screen_position) |
| 4961 | && (whole || !EQ (Vscroll_preserve_screen_position, Qt))) |
| 4962 | { |
| 4963 | SET_PT_BOTH (pos, pos_byte); |
| 4964 | Fvertical_motion (make_number (original_vpos), window); |
| 4965 | } |
| 4966 | /* If we scrolled forward, put point enough lines down |
| 4967 | that it is outside the scroll margin. */ |
| 4968 | else if (n > 0) |
| 4969 | { |
| 4970 | int top_margin; |
| 4971 | |
| 4972 | if (this_scroll_margin > 0) |
| 4973 | { |
| 4974 | SET_PT_BOTH (pos, pos_byte); |
| 4975 | Fvertical_motion (make_number (this_scroll_margin), window); |
| 4976 | top_margin = PT; |
| 4977 | } |
| 4978 | else |
| 4979 | top_margin = pos; |
| 4980 | |
| 4981 | if (top_margin <= opoint) |
| 4982 | SET_PT_BOTH (opoint, opoint_byte); |
| 4983 | else if (!NILP (Vscroll_preserve_screen_position)) |
| 4984 | { |
| 4985 | SET_PT_BOTH (pos, pos_byte); |
| 4986 | Fvertical_motion (make_number (original_vpos), window); |
| 4987 | } |
| 4988 | else |
| 4989 | SET_PT (top_margin); |
| 4990 | } |
| 4991 | else if (n < 0) |
| 4992 | { |
| 4993 | int bottom_margin; |
| 4994 | |
| 4995 | /* If we scrolled backward, put point near the end of the window |
| 4996 | but not within the scroll margin. */ |
| 4997 | SET_PT_BOTH (pos, pos_byte); |
| 4998 | tem = Fvertical_motion (make_number (ht - this_scroll_margin), window); |
| 4999 | if (XFASTINT (tem) == ht - this_scroll_margin) |
| 5000 | bottom_margin = PT; |
| 5001 | else |
| 5002 | bottom_margin = PT + 1; |
| 5003 | |
| 5004 | if (bottom_margin > opoint) |
| 5005 | SET_PT_BOTH (opoint, opoint_byte); |
| 5006 | else |
| 5007 | { |
| 5008 | if (!NILP (Vscroll_preserve_screen_position)) |
| 5009 | { |
| 5010 | SET_PT_BOTH (pos, pos_byte); |
| 5011 | Fvertical_motion (make_number (original_vpos), window); |
| 5012 | } |
| 5013 | else |
| 5014 | Fvertical_motion (make_number (-1), window); |
| 5015 | } |
| 5016 | } |
| 5017 | } |
| 5018 | else |
| 5019 | { |
| 5020 | if (noerror) |
| 5021 | return; |
| 5022 | else |
| 5023 | Fsignal (Qend_of_buffer, Qnil); |
| 5024 | } |
| 5025 | } |
| 5026 | |
| 5027 | |
| 5028 | /* Scroll selected_window up or down. If N is nil, scroll a |
| 5029 | screen-full which is defined as the height of the window minus |
| 5030 | next_screen_context_lines. If N is the symbol `-', scroll. |
| 5031 | DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll |
| 5032 | up. This is the guts of Fscroll_up and Fscroll_down. */ |
| 5033 | |
| 5034 | static void |
| 5035 | scroll_command (n, direction) |
| 5036 | Lisp_Object n; |
| 5037 | int direction; |
| 5038 | { |
| 5039 | int count = SPECPDL_INDEX (); |
| 5040 | |
| 5041 | xassert (abs (direction) == 1); |
| 5042 | |
| 5043 | /* If selected window's buffer isn't current, make it current for |
| 5044 | the moment. But don't screw up if window_scroll gets an error. */ |
| 5045 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) |
| 5046 | { |
| 5047 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 5048 | Fset_buffer (XWINDOW (selected_window)->buffer); |
| 5049 | |
| 5050 | /* Make redisplay consider other windows than just selected_window. */ |
| 5051 | ++windows_or_buffers_changed; |
| 5052 | } |
| 5053 | |
| 5054 | if (NILP (n)) |
| 5055 | window_scroll (selected_window, direction, 1, 0); |
| 5056 | else if (EQ (n, Qminus)) |
| 5057 | window_scroll (selected_window, -direction, 1, 0); |
| 5058 | else |
| 5059 | { |
| 5060 | n = Fprefix_numeric_value (n); |
| 5061 | window_scroll (selected_window, XINT (n) * direction, 0, 0); |
| 5062 | } |
| 5063 | |
| 5064 | unbind_to (count, Qnil); |
| 5065 | } |
| 5066 | |
| 5067 | DEFUN ("scroll-up", Fscroll_up, Sscroll_up, 0, 1, "P", |
| 5068 | doc: /* Scroll text of current window upward ARG lines. |
| 5069 | If ARG is omitted or nil, scroll upward by a near full screen. |
| 5070 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 5071 | Negative ARG means scroll downward. |
| 5072 | If ARG is the atom `-', scroll downward by nearly full screen. |
| 5073 | When calling from a program, supply as argument a number, nil, or `-'. */) |
| 5074 | (arg) |
| 5075 | Lisp_Object arg; |
| 5076 | { |
| 5077 | scroll_command (arg, 1); |
| 5078 | return Qnil; |
| 5079 | } |
| 5080 | |
| 5081 | DEFUN ("scroll-down", Fscroll_down, Sscroll_down, 0, 1, "P", |
| 5082 | doc: /* Scroll text of current window down ARG lines. |
| 5083 | If ARG is omitted or nil, scroll down by a near full screen. |
| 5084 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 5085 | Negative ARG means scroll upward. |
| 5086 | If ARG is the atom `-', scroll upward by nearly full screen. |
| 5087 | When calling from a program, supply as argument a number, nil, or `-'. */) |
| 5088 | (arg) |
| 5089 | Lisp_Object arg; |
| 5090 | { |
| 5091 | scroll_command (arg, -1); |
| 5092 | return Qnil; |
| 5093 | } |
| 5094 | \f |
| 5095 | DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling, Sother_window_for_scrolling, 0, 0, 0, |
| 5096 | doc: /* Return the other window for \"other window scroll\" commands. |
| 5097 | If `other-window-scroll-buffer' is non-nil, a window |
| 5098 | showing that buffer is used. |
| 5099 | If in the minibuffer, `minibuffer-scroll-window' if non-nil |
| 5100 | specifies the window. This takes precedence over |
| 5101 | `other-window-scroll-buffer'. */) |
| 5102 | () |
| 5103 | { |
| 5104 | Lisp_Object window; |
| 5105 | |
| 5106 | if (MINI_WINDOW_P (XWINDOW (selected_window)) |
| 5107 | && !NILP (Vminibuf_scroll_window)) |
| 5108 | window = Vminibuf_scroll_window; |
| 5109 | /* If buffer is specified, scroll that buffer. */ |
| 5110 | else if (!NILP (Vother_window_scroll_buffer)) |
| 5111 | { |
| 5112 | window = Fget_buffer_window (Vother_window_scroll_buffer, Qnil); |
| 5113 | if (NILP (window)) |
| 5114 | window = Fdisplay_buffer (Vother_window_scroll_buffer, Qt, Qnil); |
| 5115 | } |
| 5116 | else |
| 5117 | { |
| 5118 | /* Nothing specified; look for a neighboring window on the same |
| 5119 | frame. */ |
| 5120 | window = Fnext_window (selected_window, Qnil, Qnil); |
| 5121 | |
| 5122 | if (EQ (window, selected_window)) |
| 5123 | /* That didn't get us anywhere; look for a window on another |
| 5124 | visible frame. */ |
| 5125 | do |
| 5126 | window = Fnext_window (window, Qnil, Qt); |
| 5127 | while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window)))) |
| 5128 | && ! EQ (window, selected_window)); |
| 5129 | } |
| 5130 | |
| 5131 | CHECK_LIVE_WINDOW (window); |
| 5132 | |
| 5133 | if (EQ (window, selected_window)) |
| 5134 | error ("There is no other window"); |
| 5135 | |
| 5136 | return window; |
| 5137 | } |
| 5138 | |
| 5139 | DEFUN ("scroll-other-window", Fscroll_other_window, Sscroll_other_window, 0, 1, "P", |
| 5140 | doc: /* Scroll next window upward ARG lines; or near full screen if no ARG. |
| 5141 | A near full screen is `next-screen-context-lines' less than a full screen. |
| 5142 | The next window is the one below the current one; or the one at the top |
| 5143 | if the current one is at the bottom. Negative ARG means scroll downward. |
| 5144 | If ARG is the atom `-', scroll downward by nearly full screen. |
| 5145 | When calling from a program, supply as argument a number, nil, or `-'. |
| 5146 | |
| 5147 | If `other-window-scroll-buffer' is non-nil, scroll the window |
| 5148 | showing that buffer, popping the buffer up if necessary. |
| 5149 | If in the minibuffer, `minibuffer-scroll-window' if non-nil |
| 5150 | specifies the window to scroll. This takes precedence over |
| 5151 | `other-window-scroll-buffer'. */) |
| 5152 | (arg) |
| 5153 | Lisp_Object arg; |
| 5154 | { |
| 5155 | Lisp_Object window; |
| 5156 | struct window *w; |
| 5157 | int count = SPECPDL_INDEX (); |
| 5158 | |
| 5159 | window = Fother_window_for_scrolling (); |
| 5160 | w = XWINDOW (window); |
| 5161 | |
| 5162 | /* Don't screw up if window_scroll gets an error. */ |
| 5163 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 5164 | ++windows_or_buffers_changed; |
| 5165 | |
| 5166 | Fset_buffer (w->buffer); |
| 5167 | SET_PT (marker_position (w->pointm)); |
| 5168 | |
| 5169 | if (NILP (arg)) |
| 5170 | window_scroll (window, 1, 1, 1); |
| 5171 | else if (EQ (arg, Qminus)) |
| 5172 | window_scroll (window, -1, 1, 1); |
| 5173 | else |
| 5174 | { |
| 5175 | if (CONSP (arg)) |
| 5176 | arg = Fcar (arg); |
| 5177 | CHECK_NUMBER (arg); |
| 5178 | window_scroll (window, XINT (arg), 0, 1); |
| 5179 | } |
| 5180 | |
| 5181 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
| 5182 | unbind_to (count, Qnil); |
| 5183 | |
| 5184 | return Qnil; |
| 5185 | } |
| 5186 | \f |
| 5187 | DEFUN ("scroll-left", Fscroll_left, Sscroll_left, 0, 2, "P\np", |
| 5188 | doc: /* Scroll selected window display ARG columns left. |
| 5189 | Default for ARG is window width minus 2. |
| 5190 | Value is the total amount of leftward horizontal scrolling in |
| 5191 | effect after the change. |
| 5192 | If SET_MINIMUM is non-nil, the new scroll amount becomes the |
| 5193 | lower bound for automatic scrolling, i.e. automatic scrolling |
| 5194 | will not scroll a window to a column less than the value returned |
| 5195 | by this function. This happens in an interactive call. */) |
| 5196 | (arg, set_minimum) |
| 5197 | register Lisp_Object arg, set_minimum; |
| 5198 | { |
| 5199 | Lisp_Object result; |
| 5200 | int hscroll; |
| 5201 | struct window *w = XWINDOW (selected_window); |
| 5202 | |
| 5203 | if (NILP (arg)) |
| 5204 | XSETFASTINT (arg, window_box_text_cols (w) - 2); |
| 5205 | else |
| 5206 | arg = Fprefix_numeric_value (arg); |
| 5207 | |
| 5208 | hscroll = XINT (w->hscroll) + XINT (arg); |
| 5209 | result = Fset_window_hscroll (selected_window, make_number (hscroll)); |
| 5210 | |
| 5211 | if (!NILP (set_minimum)) |
| 5212 | w->min_hscroll = w->hscroll; |
| 5213 | |
| 5214 | return result; |
| 5215 | } |
| 5216 | |
| 5217 | DEFUN ("scroll-right", Fscroll_right, Sscroll_right, 0, 2, "P\np", |
| 5218 | doc: /* Scroll selected window display ARG columns right. |
| 5219 | Default for ARG is window width minus 2. |
| 5220 | Value is the total amount of leftward horizontal scrolling in |
| 5221 | effect after the change. |
| 5222 | If SET_MINIMUM is non-nil, the new scroll amount becomes the |
| 5223 | lower bound for automatic scrolling, i.e. automatic scrolling |
| 5224 | will not scroll a window to a column less than the value returned |
| 5225 | by this function. This happens in an interactive call. */) |
| 5226 | (arg, set_minimum) |
| 5227 | register Lisp_Object arg, set_minimum; |
| 5228 | { |
| 5229 | Lisp_Object result; |
| 5230 | int hscroll; |
| 5231 | struct window *w = XWINDOW (selected_window); |
| 5232 | |
| 5233 | if (NILP (arg)) |
| 5234 | XSETFASTINT (arg, window_box_text_cols (w) - 2); |
| 5235 | else |
| 5236 | arg = Fprefix_numeric_value (arg); |
| 5237 | |
| 5238 | hscroll = XINT (w->hscroll) - XINT (arg); |
| 5239 | result = Fset_window_hscroll (selected_window, make_number (hscroll)); |
| 5240 | |
| 5241 | if (!NILP (set_minimum)) |
| 5242 | w->min_hscroll = w->hscroll; |
| 5243 | |
| 5244 | return result; |
| 5245 | } |
| 5246 | |
| 5247 | DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window, Sminibuffer_selected_window, 0, 0, 0, |
| 5248 | doc: /* Return the window which was selected when entering the minibuffer. |
| 5249 | Returns nil, if current window is not a minibuffer window. */) |
| 5250 | () |
| 5251 | { |
| 5252 | if (minibuf_level > 0 |
| 5253 | && MINI_WINDOW_P (XWINDOW (selected_window)) |
| 5254 | && WINDOW_LIVE_P (minibuf_selected_window)) |
| 5255 | return minibuf_selected_window; |
| 5256 | |
| 5257 | return Qnil; |
| 5258 | } |
| 5259 | |
| 5260 | /* Value is the number of lines actually displayed in window W, |
| 5261 | as opposed to its height. */ |
| 5262 | |
| 5263 | static int |
| 5264 | displayed_window_lines (w) |
| 5265 | struct window *w; |
| 5266 | { |
| 5267 | struct it it; |
| 5268 | struct text_pos start; |
| 5269 | int height = window_box_height (w); |
| 5270 | struct buffer *old_buffer; |
| 5271 | int bottom_y; |
| 5272 | |
| 5273 | if (XBUFFER (w->buffer) != current_buffer) |
| 5274 | { |
| 5275 | old_buffer = current_buffer; |
| 5276 | set_buffer_internal (XBUFFER (w->buffer)); |
| 5277 | } |
| 5278 | else |
| 5279 | old_buffer = NULL; |
| 5280 | |
| 5281 | /* In case W->start is out of the accessible range, do something |
| 5282 | reasonable. This happens in Info mode when Info-scroll-down |
| 5283 | calls (recenter -1) while W->start is 1. */ |
| 5284 | if (XMARKER (w->start)->charpos < BEGV) |
| 5285 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); |
| 5286 | else if (XMARKER (w->start)->charpos > ZV) |
| 5287 | SET_TEXT_POS (start, ZV, ZV_BYTE); |
| 5288 | else |
| 5289 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
| 5290 | |
| 5291 | start_display (&it, w, start); |
| 5292 | move_it_vertically (&it, height); |
| 5293 | bottom_y = line_bottom_y (&it); |
| 5294 | |
| 5295 | /* rms: On a non-window display, |
| 5296 | the value of it.vpos at the bottom of the screen |
| 5297 | seems to be 1 larger than window_box_height (w). |
| 5298 | This kludge fixes a bug whereby (move-to-window-line -1) |
| 5299 | when ZV is on the last screen line |
| 5300 | moves to the previous screen line instead of the last one. */ |
| 5301 | if (! FRAME_WINDOW_P (XFRAME (w->frame))) |
| 5302 | height++; |
| 5303 | |
| 5304 | /* Add in empty lines at the bottom of the window. */ |
| 5305 | if (bottom_y < height) |
| 5306 | { |
| 5307 | int uy = FRAME_LINE_HEIGHT (it.f); |
| 5308 | it.vpos += (height - bottom_y + uy - 1) / uy; |
| 5309 | } |
| 5310 | |
| 5311 | if (old_buffer) |
| 5312 | set_buffer_internal (old_buffer); |
| 5313 | |
| 5314 | return it.vpos; |
| 5315 | } |
| 5316 | |
| 5317 | |
| 5318 | DEFUN ("recenter", Frecenter, Srecenter, 0, 1, "P", |
| 5319 | doc: /* Center point in window and redisplay frame. |
| 5320 | With prefix argument ARG, recenter putting point on screen line ARG |
| 5321 | relative to the current window. If ARG is negative, it counts up from the |
| 5322 | bottom of the window. (ARG should be less than the height of the window.) |
| 5323 | |
| 5324 | If ARG is omitted or nil, erase the entire frame and then |
| 5325 | redraw with point in the center of the current window. |
| 5326 | Just C-u as prefix means put point in the center of the window |
| 5327 | and redisplay normally--don't erase and redraw the frame. */) |
| 5328 | (arg) |
| 5329 | register Lisp_Object arg; |
| 5330 | { |
| 5331 | struct window *w = XWINDOW (selected_window); |
| 5332 | struct buffer *buf = XBUFFER (w->buffer); |
| 5333 | struct buffer *obuf = current_buffer; |
| 5334 | int center_p = 0; |
| 5335 | int charpos, bytepos; |
| 5336 | |
| 5337 | /* If redisplay is suppressed due to an error, try again. */ |
| 5338 | obuf->display_error_modiff = 0; |
| 5339 | |
| 5340 | if (NILP (arg)) |
| 5341 | { |
| 5342 | int i; |
| 5343 | |
| 5344 | /* Invalidate pixel data calculated for all compositions. */ |
| 5345 | for (i = 0; i < n_compositions; i++) |
| 5346 | composition_table[i]->font = NULL; |
| 5347 | |
| 5348 | Fredraw_frame (w->frame); |
| 5349 | SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w))); |
| 5350 | center_p = 1; |
| 5351 | } |
| 5352 | else if (CONSP (arg)) /* Just C-u. */ |
| 5353 | center_p = 1; |
| 5354 | else |
| 5355 | { |
| 5356 | arg = Fprefix_numeric_value (arg); |
| 5357 | CHECK_NUMBER (arg); |
| 5358 | } |
| 5359 | |
| 5360 | set_buffer_internal (buf); |
| 5361 | |
| 5362 | /* Handle centering on a graphical frame specially. Such frames can |
| 5363 | have variable-height lines and centering point on the basis of |
| 5364 | line counts would lead to strange effects. */ |
| 5365 | if (FRAME_WINDOW_P (XFRAME (w->frame))) |
| 5366 | { |
| 5367 | if (center_p) |
| 5368 | { |
| 5369 | struct it it; |
| 5370 | struct text_pos pt; |
| 5371 | |
| 5372 | SET_TEXT_POS (pt, PT, PT_BYTE); |
| 5373 | start_display (&it, w, pt); |
| 5374 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
| 5375 | charpos = IT_CHARPOS (it); |
| 5376 | bytepos = IT_BYTEPOS (it); |
| 5377 | } |
| 5378 | else if (XINT (arg) < 0) |
| 5379 | { |
| 5380 | struct it it; |
| 5381 | struct text_pos pt; |
| 5382 | int nlines = - XINT (arg); |
| 5383 | int extra_line_spacing; |
| 5384 | int h = window_box_height (w); |
| 5385 | |
| 5386 | SET_TEXT_POS (pt, PT, PT_BYTE); |
| 5387 | start_display (&it, w, pt); |
| 5388 | |
| 5389 | /* Be sure we have the exact height of the full line containing PT. */ |
| 5390 | move_it_by_lines (&it, 0, 1); |
| 5391 | |
| 5392 | /* The amount of pixels we have to move back is the window |
| 5393 | height minus what's displayed in the line containing PT, |
| 5394 | and the lines below. */ |
| 5395 | it.current_y = 0; |
| 5396 | it.vpos = 0; |
| 5397 | move_it_by_lines (&it, nlines, 1); |
| 5398 | |
| 5399 | if (it.vpos == nlines) |
| 5400 | h -= it.current_y; |
| 5401 | else |
| 5402 | { |
| 5403 | /* Last line has no newline */ |
| 5404 | h -= line_bottom_y (&it); |
| 5405 | it.vpos++; |
| 5406 | } |
| 5407 | |
| 5408 | /* Don't reserve space for extra line spacing of last line. */ |
| 5409 | extra_line_spacing = it.max_extra_line_spacing; |
| 5410 | |
| 5411 | /* If we can't move down NLINES lines because we hit |
| 5412 | the end of the buffer, count in some empty lines. */ |
| 5413 | if (it.vpos < nlines) |
| 5414 | { |
| 5415 | nlines -= it.vpos; |
| 5416 | extra_line_spacing = it.extra_line_spacing; |
| 5417 | h -= nlines * (FRAME_LINE_HEIGHT (it.f) + extra_line_spacing); |
| 5418 | } |
| 5419 | if (h <= 0) |
| 5420 | return Qnil; |
| 5421 | |
| 5422 | /* Now find the new top line (starting position) of the window. */ |
| 5423 | start_display (&it, w, pt); |
| 5424 | it.current_y = 0; |
| 5425 | move_it_vertically_backward (&it, h); |
| 5426 | |
| 5427 | /* If extra line spacing is present, we may move too far |
| 5428 | back. This causes the last line to be only partially |
| 5429 | visible (which triggers redisplay to recenter that line |
| 5430 | in the middle), so move forward. |
| 5431 | But ignore extra line spacing on last line, as it is not |
| 5432 | considered to be part of the visible height of the line. |
| 5433 | */ |
| 5434 | h += extra_line_spacing; |
| 5435 | while (-it.current_y > h) |
| 5436 | move_it_by_lines (&it, 1, 1); |
| 5437 | |
| 5438 | charpos = IT_CHARPOS (it); |
| 5439 | bytepos = IT_BYTEPOS (it); |
| 5440 | } |
| 5441 | else |
| 5442 | { |
| 5443 | struct position pos; |
| 5444 | pos = *vmotion (PT, - XINT (arg), w); |
| 5445 | charpos = pos.bufpos; |
| 5446 | bytepos = pos.bytepos; |
| 5447 | } |
| 5448 | } |
| 5449 | else |
| 5450 | { |
| 5451 | struct position pos; |
| 5452 | int ht = window_internal_height (w); |
| 5453 | |
| 5454 | if (center_p) |
| 5455 | arg = make_number (ht / 2); |
| 5456 | else if (XINT (arg) < 0) |
| 5457 | arg = make_number (XINT (arg) + ht); |
| 5458 | |
| 5459 | pos = *vmotion (PT, - XINT (arg), w); |
| 5460 | charpos = pos.bufpos; |
| 5461 | bytepos = pos.bytepos; |
| 5462 | } |
| 5463 | |
| 5464 | /* Set the new window start. */ |
| 5465 | set_marker_both (w->start, w->buffer, charpos, bytepos); |
| 5466 | w->window_end_valid = Qnil; |
| 5467 | |
| 5468 | w->optional_new_start = Qt; |
| 5469 | |
| 5470 | if (bytepos == BEGV_BYTE || FETCH_BYTE (bytepos - 1) == '\n') |
| 5471 | w->start_at_line_beg = Qt; |
| 5472 | else |
| 5473 | w->start_at_line_beg = Qnil; |
| 5474 | |
| 5475 | set_buffer_internal (obuf); |
| 5476 | return Qnil; |
| 5477 | } |
| 5478 | |
| 5479 | |
| 5480 | DEFUN ("window-text-height", Fwindow_text_height, Swindow_text_height, |
| 5481 | 0, 1, 0, |
| 5482 | doc: /* Return the height in lines of the text display area of WINDOW. |
| 5483 | This doesn't include the mode-line (or header-line if any) or any |
| 5484 | partial-height lines in the text display area. */) |
| 5485 | (window) |
| 5486 | Lisp_Object window; |
| 5487 | { |
| 5488 | struct window *w = decode_window (window); |
| 5489 | int pixel_height = window_box_height (w); |
| 5490 | int line_height = pixel_height / FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
| 5491 | return make_number (line_height); |
| 5492 | } |
| 5493 | |
| 5494 | |
| 5495 | \f |
| 5496 | DEFUN ("move-to-window-line", Fmove_to_window_line, Smove_to_window_line, |
| 5497 | 1, 1, "P", |
| 5498 | doc: /* Position point relative to window. |
| 5499 | With no argument, position point at center of window. |
| 5500 | An argument specifies vertical position within the window; |
| 5501 | zero means top of window, negative means relative to bottom of window. */) |
| 5502 | (arg) |
| 5503 | Lisp_Object arg; |
| 5504 | { |
| 5505 | struct window *w = XWINDOW (selected_window); |
| 5506 | int lines, start; |
| 5507 | Lisp_Object window; |
| 5508 | |
| 5509 | window = selected_window; |
| 5510 | start = marker_position (w->start); |
| 5511 | if (start < BEGV || start > ZV) |
| 5512 | { |
| 5513 | int height = window_internal_height (w); |
| 5514 | Fvertical_motion (make_number (- (height / 2)), window); |
| 5515 | set_marker_both (w->start, w->buffer, PT, PT_BYTE); |
| 5516 | w->start_at_line_beg = Fbolp (); |
| 5517 | w->force_start = Qt; |
| 5518 | } |
| 5519 | else |
| 5520 | Fgoto_char (w->start); |
| 5521 | |
| 5522 | lines = displayed_window_lines (w); |
| 5523 | if (NILP (arg)) |
| 5524 | XSETFASTINT (arg, lines / 2); |
| 5525 | else |
| 5526 | { |
| 5527 | arg = Fprefix_numeric_value (arg); |
| 5528 | if (XINT (arg) < 0) |
| 5529 | XSETINT (arg, XINT (arg) + lines); |
| 5530 | } |
| 5531 | |
| 5532 | /* Skip past a partially visible first line. */ |
| 5533 | if (w->vscroll) |
| 5534 | XSETINT (arg, XINT (arg) + 1); |
| 5535 | |
| 5536 | return Fvertical_motion (arg, window); |
| 5537 | } |
| 5538 | |
| 5539 | |
| 5540 | \f |
| 5541 | /*********************************************************************** |
| 5542 | Window Configuration |
| 5543 | ***********************************************************************/ |
| 5544 | |
| 5545 | struct save_window_data |
| 5546 | { |
| 5547 | EMACS_INT size_from_Lisp_Vector_struct; |
| 5548 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
| 5549 | Lisp_Object frame_cols, frame_lines, frame_menu_bar_lines; |
| 5550 | Lisp_Object frame_tool_bar_lines; |
| 5551 | Lisp_Object selected_frame; |
| 5552 | Lisp_Object current_window; |
| 5553 | Lisp_Object current_buffer; |
| 5554 | Lisp_Object minibuf_scroll_window; |
| 5555 | Lisp_Object minibuf_selected_window; |
| 5556 | Lisp_Object root_window; |
| 5557 | Lisp_Object focus_frame; |
| 5558 | /* Record the values of window-min-width and window-min-height |
| 5559 | so that window sizes remain consistent with them. */ |
| 5560 | Lisp_Object min_width, min_height; |
| 5561 | /* A vector, each of whose elements is a struct saved_window |
| 5562 | for one window. */ |
| 5563 | Lisp_Object saved_windows; |
| 5564 | }; |
| 5565 | |
| 5566 | /* This is saved as a Lisp_Vector */ |
| 5567 | struct saved_window |
| 5568 | { |
| 5569 | /* these first two must agree with struct Lisp_Vector in lisp.h */ |
| 5570 | EMACS_INT size_from_Lisp_Vector_struct; |
| 5571 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
| 5572 | |
| 5573 | Lisp_Object window; |
| 5574 | Lisp_Object buffer, start, pointm, mark; |
| 5575 | Lisp_Object left_col, top_line, total_cols, total_lines; |
| 5576 | Lisp_Object hscroll, min_hscroll; |
| 5577 | Lisp_Object parent, prev; |
| 5578 | Lisp_Object start_at_line_beg; |
| 5579 | Lisp_Object display_table; |
| 5580 | Lisp_Object orig_top_line, orig_total_lines; |
| 5581 | Lisp_Object left_margin_cols, right_margin_cols; |
| 5582 | Lisp_Object left_fringe_width, right_fringe_width, fringes_outside_margins; |
| 5583 | Lisp_Object scroll_bar_width, vertical_scroll_bar_type; |
| 5584 | }; |
| 5585 | |
| 5586 | #define SAVED_WINDOW_VECTOR_SIZE 24 /* Arg to Fmake_vector */ |
| 5587 | |
| 5588 | #define SAVED_WINDOW_N(swv,n) \ |
| 5589 | ((struct saved_window *) (XVECTOR ((swv)->contents[(n)]))) |
| 5590 | |
| 5591 | DEFUN ("window-configuration-p", Fwindow_configuration_p, Swindow_configuration_p, 1, 1, 0, |
| 5592 | doc: /* Return t if OBJECT is a window-configuration object. */) |
| 5593 | (object) |
| 5594 | Lisp_Object object; |
| 5595 | { |
| 5596 | if (WINDOW_CONFIGURATIONP (object)) |
| 5597 | return Qt; |
| 5598 | return Qnil; |
| 5599 | } |
| 5600 | |
| 5601 | DEFUN ("window-configuration-frame", Fwindow_configuration_frame, Swindow_configuration_frame, 1, 1, 0, |
| 5602 | doc: /* Return the frame that CONFIG, a window-configuration object, is about. */) |
| 5603 | (config) |
| 5604 | Lisp_Object config; |
| 5605 | { |
| 5606 | register struct save_window_data *data; |
| 5607 | struct Lisp_Vector *saved_windows; |
| 5608 | |
| 5609 | if (! WINDOW_CONFIGURATIONP (config)) |
| 5610 | wrong_type_argument (Qwindow_configuration_p, config); |
| 5611 | |
| 5612 | data = (struct save_window_data *) XVECTOR (config); |
| 5613 | saved_windows = XVECTOR (data->saved_windows); |
| 5614 | return XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 5615 | } |
| 5616 | |
| 5617 | DEFUN ("set-window-configuration", Fset_window_configuration, |
| 5618 | Sset_window_configuration, 1, 1, 0, |
| 5619 | doc: /* Set the configuration of windows and buffers as specified by CONFIGURATION. |
| 5620 | CONFIGURATION must be a value previously returned |
| 5621 | by `current-window-configuration' (which see). |
| 5622 | If CONFIGURATION was made from a frame that is now deleted, |
| 5623 | only frame-independent values can be restored. In this case, |
| 5624 | the return value is nil. Otherwise the value is t. */) |
| 5625 | (configuration) |
| 5626 | Lisp_Object configuration; |
| 5627 | { |
| 5628 | register struct save_window_data *data; |
| 5629 | struct Lisp_Vector *saved_windows; |
| 5630 | Lisp_Object new_current_buffer; |
| 5631 | Lisp_Object frame; |
| 5632 | FRAME_PTR f; |
| 5633 | int old_point = -1; |
| 5634 | |
| 5635 | while (!WINDOW_CONFIGURATIONP (configuration)) |
| 5636 | wrong_type_argument (Qwindow_configuration_p, configuration); |
| 5637 | |
| 5638 | data = (struct save_window_data *) XVECTOR (configuration); |
| 5639 | saved_windows = XVECTOR (data->saved_windows); |
| 5640 | |
| 5641 | new_current_buffer = data->current_buffer; |
| 5642 | if (NILP (XBUFFER (new_current_buffer)->name)) |
| 5643 | new_current_buffer = Qnil; |
| 5644 | else |
| 5645 | { |
| 5646 | if (XBUFFER (new_current_buffer) == current_buffer) |
| 5647 | old_point = PT; |
| 5648 | else |
| 5649 | /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of |
| 5650 | point in new_current_buffer as of the last time this buffer was |
| 5651 | used. This can be non-deterministic since it can be changed by |
| 5652 | things like jit-lock by mere temporary selection of some random |
| 5653 | window that happens to show this buffer. |
| 5654 | So if possible we want this arbitrary choice of "which point" to |
| 5655 | be the one from the to-be-selected-window so as to prevent this |
| 5656 | window's cursor from being copied from another window. */ |
| 5657 | if (EQ (XWINDOW (data->current_window)->buffer, new_current_buffer) |
| 5658 | /* If current_window = selected_window, its point is in BUF_PT. */ |
| 5659 | && !EQ (selected_window, data->current_window)) |
| 5660 | old_point = XMARKER (XWINDOW (data->current_window)->pointm)->charpos; |
| 5661 | else |
| 5662 | old_point = BUF_PT (XBUFFER (new_current_buffer)); |
| 5663 | } |
| 5664 | |
| 5665 | frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 5666 | f = XFRAME (frame); |
| 5667 | |
| 5668 | /* If f is a dead frame, don't bother rebuilding its window tree. |
| 5669 | However, there is other stuff we should still try to do below. */ |
| 5670 | if (FRAME_LIVE_P (f)) |
| 5671 | { |
| 5672 | register struct window *w; |
| 5673 | register struct saved_window *p; |
| 5674 | struct window *root_window; |
| 5675 | struct window **leaf_windows; |
| 5676 | int n_leaf_windows; |
| 5677 | int k, i, n; |
| 5678 | |
| 5679 | /* If the frame has been resized since this window configuration was |
| 5680 | made, we change the frame to the size specified in the |
| 5681 | configuration, restore the configuration, and then resize it |
| 5682 | back. We keep track of the prevailing height in these variables. */ |
| 5683 | int previous_frame_lines = FRAME_LINES (f); |
| 5684 | int previous_frame_cols = FRAME_COLS (f); |
| 5685 | int previous_frame_menu_bar_lines = FRAME_MENU_BAR_LINES (f); |
| 5686 | int previous_frame_tool_bar_lines = FRAME_TOOL_BAR_LINES (f); |
| 5687 | |
| 5688 | /* The mouse highlighting code could get screwed up |
| 5689 | if it runs during this. */ |
| 5690 | BLOCK_INPUT; |
| 5691 | |
| 5692 | if (XFASTINT (data->frame_lines) != previous_frame_lines |
| 5693 | || XFASTINT (data->frame_cols) != previous_frame_cols) |
| 5694 | change_frame_size (f, XFASTINT (data->frame_lines), |
| 5695 | XFASTINT (data->frame_cols), 0, 0, 0); |
| 5696 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 5697 | if (XFASTINT (data->frame_menu_bar_lines) |
| 5698 | != previous_frame_menu_bar_lines) |
| 5699 | x_set_menu_bar_lines (f, data->frame_menu_bar_lines, make_number (0)); |
| 5700 | #ifdef HAVE_WINDOW_SYSTEM |
| 5701 | if (XFASTINT (data->frame_tool_bar_lines) |
| 5702 | != previous_frame_tool_bar_lines) |
| 5703 | x_set_tool_bar_lines (f, data->frame_tool_bar_lines, make_number (0)); |
| 5704 | #endif |
| 5705 | #endif |
| 5706 | |
| 5707 | /* "Swap out" point from the selected window's buffer |
| 5708 | into the window itself. (Normally the pointm of the selected |
| 5709 | window holds garbage.) We do this now, before |
| 5710 | restoring the window contents, and prevent it from |
| 5711 | being done later on when we select a new window. */ |
| 5712 | if (! NILP (XWINDOW (selected_window)->buffer)) |
| 5713 | { |
| 5714 | w = XWINDOW (selected_window); |
| 5715 | set_marker_both (w->pointm, |
| 5716 | w->buffer, |
| 5717 | BUF_PT (XBUFFER (w->buffer)), |
| 5718 | BUF_PT_BYTE (XBUFFER (w->buffer))); |
| 5719 | } |
| 5720 | |
| 5721 | windows_or_buffers_changed++; |
| 5722 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 5723 | |
| 5724 | /* Problem: Freeing all matrices and later allocating them again |
| 5725 | is a serious redisplay flickering problem. What we would |
| 5726 | really like to do is to free only those matrices not reused |
| 5727 | below. */ |
| 5728 | root_window = XWINDOW (FRAME_ROOT_WINDOW (f)); |
| 5729 | leaf_windows |
| 5730 | = (struct window **) alloca (count_windows (root_window) |
| 5731 | * sizeof (struct window *)); |
| 5732 | n_leaf_windows = get_leaf_windows (root_window, leaf_windows, 0); |
| 5733 | |
| 5734 | /* Temporarily avoid any problems with windows that are smaller |
| 5735 | than they are supposed to be. */ |
| 5736 | window_min_height = 1; |
| 5737 | window_min_width = 1; |
| 5738 | |
| 5739 | /* Kludge Alert! |
| 5740 | Mark all windows now on frame as "deleted". |
| 5741 | Restoring the new configuration "undeletes" any that are in it. |
| 5742 | |
| 5743 | Save their current buffers in their height fields, since we may |
| 5744 | need it later, if a buffer saved in the configuration is now |
| 5745 | dead. */ |
| 5746 | delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 5747 | |
| 5748 | for (k = 0; k < saved_windows->size; k++) |
| 5749 | { |
| 5750 | p = SAVED_WINDOW_N (saved_windows, k); |
| 5751 | w = XWINDOW (p->window); |
| 5752 | w->next = Qnil; |
| 5753 | |
| 5754 | if (!NILP (p->parent)) |
| 5755 | w->parent = SAVED_WINDOW_N (saved_windows, |
| 5756 | XFASTINT (p->parent))->window; |
| 5757 | else |
| 5758 | w->parent = Qnil; |
| 5759 | |
| 5760 | if (!NILP (p->prev)) |
| 5761 | { |
| 5762 | w->prev = SAVED_WINDOW_N (saved_windows, |
| 5763 | XFASTINT (p->prev))->window; |
| 5764 | XWINDOW (w->prev)->next = p->window; |
| 5765 | } |
| 5766 | else |
| 5767 | { |
| 5768 | w->prev = Qnil; |
| 5769 | if (!NILP (w->parent)) |
| 5770 | { |
| 5771 | if (EQ (p->total_cols, XWINDOW (w->parent)->total_cols)) |
| 5772 | { |
| 5773 | XWINDOW (w->parent)->vchild = p->window; |
| 5774 | XWINDOW (w->parent)->hchild = Qnil; |
| 5775 | } |
| 5776 | else |
| 5777 | { |
| 5778 | XWINDOW (w->parent)->hchild = p->window; |
| 5779 | XWINDOW (w->parent)->vchild = Qnil; |
| 5780 | } |
| 5781 | } |
| 5782 | } |
| 5783 | |
| 5784 | /* If we squirreled away the buffer in the window's height, |
| 5785 | restore it now. */ |
| 5786 | if (BUFFERP (w->total_lines)) |
| 5787 | w->buffer = w->total_lines; |
| 5788 | w->left_col = p->left_col; |
| 5789 | w->top_line = p->top_line; |
| 5790 | w->total_cols = p->total_cols; |
| 5791 | w->total_lines = p->total_lines; |
| 5792 | w->hscroll = p->hscroll; |
| 5793 | w->min_hscroll = p->min_hscroll; |
| 5794 | w->display_table = p->display_table; |
| 5795 | w->orig_top_line = p->orig_top_line; |
| 5796 | w->orig_total_lines = p->orig_total_lines; |
| 5797 | w->left_margin_cols = p->left_margin_cols; |
| 5798 | w->right_margin_cols = p->right_margin_cols; |
| 5799 | w->left_fringe_width = p->left_fringe_width; |
| 5800 | w->right_fringe_width = p->right_fringe_width; |
| 5801 | w->fringes_outside_margins = p->fringes_outside_margins; |
| 5802 | w->scroll_bar_width = p->scroll_bar_width; |
| 5803 | w->vertical_scroll_bar_type = p->vertical_scroll_bar_type; |
| 5804 | XSETFASTINT (w->last_modified, 0); |
| 5805 | XSETFASTINT (w->last_overlay_modified, 0); |
| 5806 | |
| 5807 | /* Reinstall the saved buffer and pointers into it. */ |
| 5808 | if (NILP (p->buffer)) |
| 5809 | w->buffer = p->buffer; |
| 5810 | else |
| 5811 | { |
| 5812 | if (!NILP (XBUFFER (p->buffer)->name)) |
| 5813 | /* If saved buffer is alive, install it. */ |
| 5814 | { |
| 5815 | w->buffer = p->buffer; |
| 5816 | w->start_at_line_beg = p->start_at_line_beg; |
| 5817 | set_marker_restricted (w->start, p->start, w->buffer); |
| 5818 | set_marker_restricted (w->pointm, p->pointm, w->buffer); |
| 5819 | Fset_marker (XBUFFER (w->buffer)->mark, |
| 5820 | p->mark, w->buffer); |
| 5821 | |
| 5822 | /* As documented in Fcurrent_window_configuration, don't |
| 5823 | restore the location of point in the buffer which was |
| 5824 | current when the window configuration was recorded. */ |
| 5825 | if (!EQ (p->buffer, new_current_buffer) |
| 5826 | && XBUFFER (p->buffer) == current_buffer) |
| 5827 | Fgoto_char (w->pointm); |
| 5828 | } |
| 5829 | else if (NILP (w->buffer) || NILP (XBUFFER (w->buffer)->name)) |
| 5830 | /* Else unless window has a live buffer, get one. */ |
| 5831 | { |
| 5832 | w->buffer = Fcdr (Fcar (Vbuffer_alist)); |
| 5833 | /* This will set the markers to beginning of visible |
| 5834 | range. */ |
| 5835 | set_marker_restricted (w->start, make_number (0), w->buffer); |
| 5836 | set_marker_restricted (w->pointm, make_number (0),w->buffer); |
| 5837 | w->start_at_line_beg = Qt; |
| 5838 | } |
| 5839 | else |
| 5840 | /* Keeping window's old buffer; make sure the markers |
| 5841 | are real. */ |
| 5842 | { |
| 5843 | /* Set window markers at start of visible range. */ |
| 5844 | if (XMARKER (w->start)->buffer == 0) |
| 5845 | set_marker_restricted (w->start, make_number (0), |
| 5846 | w->buffer); |
| 5847 | if (XMARKER (w->pointm)->buffer == 0) |
| 5848 | set_marker_restricted_both (w->pointm, w->buffer, |
| 5849 | BUF_PT (XBUFFER (w->buffer)), |
| 5850 | BUF_PT_BYTE (XBUFFER (w->buffer))); |
| 5851 | w->start_at_line_beg = Qt; |
| 5852 | } |
| 5853 | } |
| 5854 | } |
| 5855 | |
| 5856 | FRAME_ROOT_WINDOW (f) = data->root_window; |
| 5857 | /* Prevent "swapping out point" in the old selected window |
| 5858 | using the buffer that has been restored into it. |
| 5859 | We already swapped out point that from that window's old buffer. */ |
| 5860 | selected_window = Qnil; |
| 5861 | |
| 5862 | /* Arrange *not* to restore point in the buffer that was |
| 5863 | current when the window configuration was saved. */ |
| 5864 | if (EQ (XWINDOW (data->current_window)->buffer, new_current_buffer)) |
| 5865 | set_marker_restricted (XWINDOW (data->current_window)->pointm, |
| 5866 | make_number (old_point), |
| 5867 | XWINDOW (data->current_window)->buffer); |
| 5868 | |
| 5869 | Fselect_window (data->current_window, Qnil); |
| 5870 | XBUFFER (XWINDOW (selected_window)->buffer)->last_selected_window |
| 5871 | = selected_window; |
| 5872 | |
| 5873 | if (NILP (data->focus_frame) |
| 5874 | || (FRAMEP (data->focus_frame) |
| 5875 | && FRAME_LIVE_P (XFRAME (data->focus_frame)))) |
| 5876 | Fredirect_frame_focus (frame, data->focus_frame); |
| 5877 | |
| 5878 | #if 0 /* I don't understand why this is needed, and it causes problems |
| 5879 | when the frame's old selected window has been deleted. */ |
| 5880 | if (f != selected_frame && FRAME_WINDOW_P (f)) |
| 5881 | do_switch_frame (WINDOW_FRAME (XWINDOW (data->root_window)), |
| 5882 | 0, 0); |
| 5883 | #endif |
| 5884 | |
| 5885 | /* Set the screen height to the value it had before this function. */ |
| 5886 | if (previous_frame_lines != FRAME_LINES (f) |
| 5887 | || previous_frame_cols != FRAME_COLS (f)) |
| 5888 | change_frame_size (f, previous_frame_lines, previous_frame_cols, |
| 5889 | 0, 0, 0); |
| 5890 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 5891 | if (previous_frame_menu_bar_lines != FRAME_MENU_BAR_LINES (f)) |
| 5892 | x_set_menu_bar_lines (f, make_number (previous_frame_menu_bar_lines), |
| 5893 | make_number (0)); |
| 5894 | #ifdef HAVE_WINDOW_SYSTEM |
| 5895 | if (previous_frame_tool_bar_lines != FRAME_TOOL_BAR_LINES (f)) |
| 5896 | x_set_tool_bar_lines (f, make_number (previous_frame_tool_bar_lines), |
| 5897 | make_number (0)); |
| 5898 | #endif |
| 5899 | #endif |
| 5900 | |
| 5901 | /* Now, free glyph matrices in windows that were not reused. */ |
| 5902 | for (i = n = 0; i < n_leaf_windows; ++i) |
| 5903 | { |
| 5904 | if (NILP (leaf_windows[i]->buffer)) |
| 5905 | { |
| 5906 | /* Assert it's not reused as a combination. */ |
| 5907 | xassert (NILP (leaf_windows[i]->hchild) |
| 5908 | && NILP (leaf_windows[i]->vchild)); |
| 5909 | free_window_matrices (leaf_windows[i]); |
| 5910 | } |
| 5911 | else if (EQ (leaf_windows[i]->buffer, new_current_buffer)) |
| 5912 | ++n; |
| 5913 | } |
| 5914 | |
| 5915 | adjust_glyphs (f); |
| 5916 | |
| 5917 | UNBLOCK_INPUT; |
| 5918 | |
| 5919 | /* Fselect_window will have made f the selected frame, so we |
| 5920 | reselect the proper frame here. Fhandle_switch_frame will change the |
| 5921 | selected window too, but that doesn't make the call to |
| 5922 | Fselect_window above totally superfluous; it still sets f's |
| 5923 | selected window. */ |
| 5924 | if (FRAME_LIVE_P (XFRAME (data->selected_frame))) |
| 5925 | do_switch_frame (data->selected_frame, 0, 0); |
| 5926 | |
| 5927 | if (! NILP (Vwindow_configuration_change_hook) |
| 5928 | && ! NILP (Vrun_hooks)) |
| 5929 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); |
| 5930 | } |
| 5931 | |
| 5932 | if (!NILP (new_current_buffer)) |
| 5933 | Fset_buffer (new_current_buffer); |
| 5934 | |
| 5935 | /* Restore the minimum heights recorded in the configuration. */ |
| 5936 | window_min_height = XINT (data->min_height); |
| 5937 | window_min_width = XINT (data->min_width); |
| 5938 | |
| 5939 | Vminibuf_scroll_window = data->minibuf_scroll_window; |
| 5940 | minibuf_selected_window = data->minibuf_selected_window; |
| 5941 | |
| 5942 | return (FRAME_LIVE_P (f) ? Qt : Qnil); |
| 5943 | } |
| 5944 | |
| 5945 | /* Mark all windows now on frame as deleted |
| 5946 | by setting their buffers to nil. */ |
| 5947 | |
| 5948 | void |
| 5949 | delete_all_subwindows (w) |
| 5950 | register struct window *w; |
| 5951 | { |
| 5952 | if (!NILP (w->next)) |
| 5953 | delete_all_subwindows (XWINDOW (w->next)); |
| 5954 | if (!NILP (w->vchild)) |
| 5955 | delete_all_subwindows (XWINDOW (w->vchild)); |
| 5956 | if (!NILP (w->hchild)) |
| 5957 | delete_all_subwindows (XWINDOW (w->hchild)); |
| 5958 | |
| 5959 | w->total_lines = w->buffer; /* See Fset_window_configuration for excuse. */ |
| 5960 | |
| 5961 | if (!NILP (w->buffer)) |
| 5962 | unshow_buffer (w); |
| 5963 | |
| 5964 | /* We set all three of these fields to nil, to make sure that we can |
| 5965 | distinguish this dead window from any live window. Live leaf |
| 5966 | windows will have buffer set, and combination windows will have |
| 5967 | vchild or hchild set. */ |
| 5968 | w->buffer = Qnil; |
| 5969 | w->vchild = Qnil; |
| 5970 | w->hchild = Qnil; |
| 5971 | |
| 5972 | Vwindow_list = Qnil; |
| 5973 | } |
| 5974 | \f |
| 5975 | static int |
| 5976 | count_windows (window) |
| 5977 | register struct window *window; |
| 5978 | { |
| 5979 | register int count = 1; |
| 5980 | if (!NILP (window->next)) |
| 5981 | count += count_windows (XWINDOW (window->next)); |
| 5982 | if (!NILP (window->vchild)) |
| 5983 | count += count_windows (XWINDOW (window->vchild)); |
| 5984 | if (!NILP (window->hchild)) |
| 5985 | count += count_windows (XWINDOW (window->hchild)); |
| 5986 | return count; |
| 5987 | } |
| 5988 | |
| 5989 | |
| 5990 | /* Fill vector FLAT with leaf windows under W, starting at index I. |
| 5991 | Value is last index + 1. */ |
| 5992 | |
| 5993 | static int |
| 5994 | get_leaf_windows (w, flat, i) |
| 5995 | struct window *w; |
| 5996 | struct window **flat; |
| 5997 | int i; |
| 5998 | { |
| 5999 | while (w) |
| 6000 | { |
| 6001 | if (!NILP (w->hchild)) |
| 6002 | i = get_leaf_windows (XWINDOW (w->hchild), flat, i); |
| 6003 | else if (!NILP (w->vchild)) |
| 6004 | i = get_leaf_windows (XWINDOW (w->vchild), flat, i); |
| 6005 | else |
| 6006 | flat[i++] = w; |
| 6007 | |
| 6008 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 6009 | } |
| 6010 | |
| 6011 | return i; |
| 6012 | } |
| 6013 | |
| 6014 | |
| 6015 | /* Return a pointer to the glyph W's physical cursor is on. Value is |
| 6016 | null if W's current matrix is invalid, so that no meaningfull glyph |
| 6017 | can be returned. */ |
| 6018 | |
| 6019 | struct glyph * |
| 6020 | get_phys_cursor_glyph (w) |
| 6021 | struct window *w; |
| 6022 | { |
| 6023 | struct glyph_row *row; |
| 6024 | struct glyph *glyph; |
| 6025 | |
| 6026 | if (w->phys_cursor.vpos >= 0 |
| 6027 | && w->phys_cursor.vpos < w->current_matrix->nrows |
| 6028 | && (row = MATRIX_ROW (w->current_matrix, w->phys_cursor.vpos), |
| 6029 | row->enabled_p) |
| 6030 | && row->used[TEXT_AREA] > w->phys_cursor.hpos) |
| 6031 | glyph = row->glyphs[TEXT_AREA] + w->phys_cursor.hpos; |
| 6032 | else |
| 6033 | glyph = NULL; |
| 6034 | |
| 6035 | return glyph; |
| 6036 | } |
| 6037 | |
| 6038 | |
| 6039 | static int |
| 6040 | save_window_save (window, vector, i) |
| 6041 | Lisp_Object window; |
| 6042 | struct Lisp_Vector *vector; |
| 6043 | int i; |
| 6044 | { |
| 6045 | register struct saved_window *p; |
| 6046 | register struct window *w; |
| 6047 | register Lisp_Object tem; |
| 6048 | |
| 6049 | for (;!NILP (window); window = w->next) |
| 6050 | { |
| 6051 | p = SAVED_WINDOW_N (vector, i); |
| 6052 | w = XWINDOW (window); |
| 6053 | |
| 6054 | XSETFASTINT (w->temslot, i); i++; |
| 6055 | p->window = window; |
| 6056 | p->buffer = w->buffer; |
| 6057 | p->left_col = w->left_col; |
| 6058 | p->top_line = w->top_line; |
| 6059 | p->total_cols = w->total_cols; |
| 6060 | p->total_lines = w->total_lines; |
| 6061 | p->hscroll = w->hscroll; |
| 6062 | p->min_hscroll = w->min_hscroll; |
| 6063 | p->display_table = w->display_table; |
| 6064 | p->orig_top_line = w->orig_top_line; |
| 6065 | p->orig_total_lines = w->orig_total_lines; |
| 6066 | p->left_margin_cols = w->left_margin_cols; |
| 6067 | p->right_margin_cols = w->right_margin_cols; |
| 6068 | p->left_fringe_width = w->left_fringe_width; |
| 6069 | p->right_fringe_width = w->right_fringe_width; |
| 6070 | p->fringes_outside_margins = w->fringes_outside_margins; |
| 6071 | p->scroll_bar_width = w->scroll_bar_width; |
| 6072 | p->vertical_scroll_bar_type = w->vertical_scroll_bar_type; |
| 6073 | if (!NILP (w->buffer)) |
| 6074 | { |
| 6075 | /* Save w's value of point in the window configuration. |
| 6076 | If w is the selected window, then get the value of point |
| 6077 | from the buffer; pointm is garbage in the selected window. */ |
| 6078 | if (EQ (window, selected_window)) |
| 6079 | { |
| 6080 | p->pointm = Fmake_marker (); |
| 6081 | set_marker_both (p->pointm, w->buffer, |
| 6082 | BUF_PT (XBUFFER (w->buffer)), |
| 6083 | BUF_PT_BYTE (XBUFFER (w->buffer))); |
| 6084 | } |
| 6085 | else |
| 6086 | p->pointm = Fcopy_marker (w->pointm, Qnil); |
| 6087 | |
| 6088 | p->start = Fcopy_marker (w->start, Qnil); |
| 6089 | p->start_at_line_beg = w->start_at_line_beg; |
| 6090 | |
| 6091 | tem = XBUFFER (w->buffer)->mark; |
| 6092 | p->mark = Fcopy_marker (tem, Qnil); |
| 6093 | } |
| 6094 | else |
| 6095 | { |
| 6096 | p->pointm = Qnil; |
| 6097 | p->start = Qnil; |
| 6098 | p->mark = Qnil; |
| 6099 | p->start_at_line_beg = Qnil; |
| 6100 | } |
| 6101 | |
| 6102 | if (NILP (w->parent)) |
| 6103 | p->parent = Qnil; |
| 6104 | else |
| 6105 | p->parent = XWINDOW (w->parent)->temslot; |
| 6106 | |
| 6107 | if (NILP (w->prev)) |
| 6108 | p->prev = Qnil; |
| 6109 | else |
| 6110 | p->prev = XWINDOW (w->prev)->temslot; |
| 6111 | |
| 6112 | if (!NILP (w->vchild)) |
| 6113 | i = save_window_save (w->vchild, vector, i); |
| 6114 | if (!NILP (w->hchild)) |
| 6115 | i = save_window_save (w->hchild, vector, i); |
| 6116 | } |
| 6117 | |
| 6118 | return i; |
| 6119 | } |
| 6120 | |
| 6121 | DEFUN ("current-window-configuration", Fcurrent_window_configuration, |
| 6122 | Scurrent_window_configuration, 0, 1, 0, |
| 6123 | doc: /* Return an object representing the current window configuration of FRAME. |
| 6124 | If FRAME is nil or omitted, use the selected frame. |
| 6125 | This describes the number of windows, their sizes and current buffers, |
| 6126 | and for each displayed buffer, where display starts, and the positions of |
| 6127 | point and mark. An exception is made for point in the current buffer: |
| 6128 | its value is -not- saved. |
| 6129 | This also records the currently selected frame, and FRAME's focus |
| 6130 | redirection (see `redirect-frame-focus'). */) |
| 6131 | (frame) |
| 6132 | Lisp_Object frame; |
| 6133 | { |
| 6134 | register Lisp_Object tem; |
| 6135 | register int n_windows; |
| 6136 | register struct save_window_data *data; |
| 6137 | register struct Lisp_Vector *vec; |
| 6138 | register int i; |
| 6139 | FRAME_PTR f; |
| 6140 | |
| 6141 | if (NILP (frame)) |
| 6142 | frame = selected_frame; |
| 6143 | CHECK_LIVE_FRAME (frame); |
| 6144 | f = XFRAME (frame); |
| 6145 | |
| 6146 | n_windows = count_windows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 6147 | vec = allocate_other_vector (VECSIZE (struct save_window_data)); |
| 6148 | data = (struct save_window_data *)vec; |
| 6149 | |
| 6150 | XSETFASTINT (data->frame_cols, FRAME_COLS (f)); |
| 6151 | XSETFASTINT (data->frame_lines, FRAME_LINES (f)); |
| 6152 | XSETFASTINT (data->frame_menu_bar_lines, FRAME_MENU_BAR_LINES (f)); |
| 6153 | XSETFASTINT (data->frame_tool_bar_lines, FRAME_TOOL_BAR_LINES (f)); |
| 6154 | data->selected_frame = selected_frame; |
| 6155 | data->current_window = FRAME_SELECTED_WINDOW (f); |
| 6156 | XSETBUFFER (data->current_buffer, current_buffer); |
| 6157 | data->minibuf_scroll_window = minibuf_level > 0 ? Vminibuf_scroll_window : Qnil; |
| 6158 | data->minibuf_selected_window = minibuf_level > 0 ? minibuf_selected_window : Qnil; |
| 6159 | data->root_window = FRAME_ROOT_WINDOW (f); |
| 6160 | data->focus_frame = FRAME_FOCUS_FRAME (f); |
| 6161 | XSETINT (data->min_height, window_min_height); |
| 6162 | XSETINT (data->min_width, window_min_width); |
| 6163 | tem = Fmake_vector (make_number (n_windows), Qnil); |
| 6164 | data->saved_windows = tem; |
| 6165 | for (i = 0; i < n_windows; i++) |
| 6166 | XVECTOR (tem)->contents[i] |
| 6167 | = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE), Qnil); |
| 6168 | save_window_save (FRAME_ROOT_WINDOW (f), XVECTOR (tem), 0); |
| 6169 | XSETWINDOW_CONFIGURATION (tem, data); |
| 6170 | return (tem); |
| 6171 | } |
| 6172 | |
| 6173 | DEFUN ("save-window-excursion", Fsave_window_excursion, Ssave_window_excursion, |
| 6174 | 0, UNEVALLED, 0, |
| 6175 | doc: /* Execute BODY, preserving window sizes and contents. |
| 6176 | Return the value of the last form in BODY. |
| 6177 | Restore which buffer appears in which window, where display starts, |
| 6178 | and the value of point and mark for each window. |
| 6179 | Also restore the choice of selected window. |
| 6180 | Also restore which buffer is current. |
| 6181 | Does not restore the value of point in current buffer. |
| 6182 | usage: (save-window-excursion BODY ...) */) |
| 6183 | (args) |
| 6184 | Lisp_Object args; |
| 6185 | { |
| 6186 | register Lisp_Object val; |
| 6187 | register int count = SPECPDL_INDEX (); |
| 6188 | |
| 6189 | record_unwind_protect (Fset_window_configuration, |
| 6190 | Fcurrent_window_configuration (Qnil)); |
| 6191 | val = Fprogn (args); |
| 6192 | return unbind_to (count, val); |
| 6193 | } |
| 6194 | |
| 6195 | \f |
| 6196 | /*********************************************************************** |
| 6197 | Marginal Areas |
| 6198 | ***********************************************************************/ |
| 6199 | |
| 6200 | DEFUN ("set-window-margins", Fset_window_margins, Sset_window_margins, |
| 6201 | 2, 3, 0, |
| 6202 | doc: /* Set width of marginal areas of window WINDOW. |
| 6203 | If WINDOW is nil, set margins of the currently selected window. |
| 6204 | Second arg LEFT-WIDTH specifies the number of character cells to |
| 6205 | reserve for the left marginal area. Optional third arg RIGHT-WIDTH |
| 6206 | does the same for the right marginal area. A nil width parameter |
| 6207 | means no margin. */) |
| 6208 | (window, left, right) |
| 6209 | Lisp_Object window, left, right; |
| 6210 | { |
| 6211 | struct window *w = decode_window (window); |
| 6212 | |
| 6213 | /* Translate negative or zero widths to nil. |
| 6214 | Margins that are too wide have to be checked elsewhere. */ |
| 6215 | |
| 6216 | if (!NILP (left)) |
| 6217 | { |
| 6218 | CHECK_NUMBER (left); |
| 6219 | if (XINT (left) <= 0) |
| 6220 | left = Qnil; |
| 6221 | } |
| 6222 | |
| 6223 | if (!NILP (right)) |
| 6224 | { |
| 6225 | CHECK_NUMBER (right); |
| 6226 | if (XINT (right) <= 0) |
| 6227 | right = Qnil; |
| 6228 | } |
| 6229 | |
| 6230 | if (!EQ (w->left_margin_cols, left) |
| 6231 | || !EQ (w->right_margin_cols, right)) |
| 6232 | { |
| 6233 | w->left_margin_cols = left; |
| 6234 | w->right_margin_cols = right; |
| 6235 | |
| 6236 | adjust_window_margins (w); |
| 6237 | |
| 6238 | ++windows_or_buffers_changed; |
| 6239 | adjust_glyphs (XFRAME (WINDOW_FRAME (w))); |
| 6240 | } |
| 6241 | |
| 6242 | return Qnil; |
| 6243 | } |
| 6244 | |
| 6245 | |
| 6246 | DEFUN ("window-margins", Fwindow_margins, Swindow_margins, |
| 6247 | 0, 1, 0, |
| 6248 | doc: /* Get width of marginal areas of window WINDOW. |
| 6249 | If WINDOW is omitted or nil, use the currently selected window. |
| 6250 | Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH). |
| 6251 | If a marginal area does not exist, its width will be returned |
| 6252 | as nil. */) |
| 6253 | (window) |
| 6254 | Lisp_Object window; |
| 6255 | { |
| 6256 | struct window *w = decode_window (window); |
| 6257 | return Fcons (w->left_margin_cols, w->right_margin_cols); |
| 6258 | } |
| 6259 | |
| 6260 | |
| 6261 | \f |
| 6262 | /*********************************************************************** |
| 6263 | Fringes |
| 6264 | ***********************************************************************/ |
| 6265 | |
| 6266 | DEFUN ("set-window-fringes", Fset_window_fringes, Sset_window_fringes, |
| 6267 | 2, 4, 0, |
| 6268 | doc: /* Set the fringe widths of window WINDOW. |
| 6269 | If WINDOW is nil, set the fringe widths of the currently selected |
| 6270 | window. |
| 6271 | Second arg LEFT-WIDTH specifies the number of pixels to reserve for |
| 6272 | the left fringe. Optional third arg RIGHT-WIDTH specifies the right |
| 6273 | fringe width. If a fringe width arg is nil, that means to use the |
| 6274 | frame's default fringe width. Default fringe widths can be set with |
| 6275 | the command `set-fringe-style'. |
| 6276 | If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes |
| 6277 | outside of the display margins. By default, fringes are drawn between |
| 6278 | display marginal areas and the text area. */) |
| 6279 | (window, left, right, outside_margins) |
| 6280 | Lisp_Object window, left, right, outside_margins; |
| 6281 | { |
| 6282 | struct window *w = decode_window (window); |
| 6283 | |
| 6284 | if (!NILP (left)) |
| 6285 | CHECK_NATNUM (left); |
| 6286 | if (!NILP (right)) |
| 6287 | CHECK_NATNUM (right); |
| 6288 | |
| 6289 | if (!EQ (w->left_fringe_width, left) |
| 6290 | || !EQ (w->right_fringe_width, right) |
| 6291 | || !EQ (w->fringes_outside_margins, outside_margins)) |
| 6292 | { |
| 6293 | w->left_fringe_width = left; |
| 6294 | w->right_fringe_width = right; |
| 6295 | w->fringes_outside_margins = outside_margins; |
| 6296 | |
| 6297 | adjust_window_margins (w); |
| 6298 | |
| 6299 | clear_glyph_matrix (w->current_matrix); |
| 6300 | w->window_end_valid = Qnil; |
| 6301 | |
| 6302 | ++windows_or_buffers_changed; |
| 6303 | adjust_glyphs (XFRAME (WINDOW_FRAME (w))); |
| 6304 | } |
| 6305 | |
| 6306 | return Qnil; |
| 6307 | } |
| 6308 | |
| 6309 | |
| 6310 | DEFUN ("window-fringes", Fwindow_fringes, Swindow_fringes, |
| 6311 | 0, 1, 0, |
| 6312 | doc: /* Get width of fringes of window WINDOW. |
| 6313 | If WINDOW is omitted or nil, use the currently selected window. |
| 6314 | Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */) |
| 6315 | (window) |
| 6316 | Lisp_Object window; |
| 6317 | { |
| 6318 | struct window *w = decode_window (window); |
| 6319 | return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w)), |
| 6320 | Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w)), |
| 6321 | Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) ? |
| 6322 | Qt : Qnil), Qnil))); |
| 6323 | } |
| 6324 | |
| 6325 | |
| 6326 | \f |
| 6327 | /*********************************************************************** |
| 6328 | Scroll bars |
| 6329 | ***********************************************************************/ |
| 6330 | |
| 6331 | DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars, Sset_window_scroll_bars, |
| 6332 | 2, 4, 0, |
| 6333 | doc: /* Set width and type of scroll bars of window WINDOW. |
| 6334 | If window is nil, set scroll bars of the currently selected window. |
| 6335 | Second parameter WIDTH specifies the pixel width for the scroll bar; |
| 6336 | this is automatically adjusted to a multiple of the frame column width. |
| 6337 | Third parameter VERTICAL-TYPE specifies the type of the vertical scroll |
| 6338 | bar: left, right, or nil. |
| 6339 | If WIDTH is nil, use the frame's scroll-bar width. |
| 6340 | If TYPE is t, use the frame's scroll-bar type. */) |
| 6341 | (window, width, vertical_type, horizontal_type) |
| 6342 | Lisp_Object window, width, vertical_type, horizontal_type; |
| 6343 | { |
| 6344 | struct window *w = decode_window (window); |
| 6345 | |
| 6346 | if (!NILP (width)) |
| 6347 | { |
| 6348 | CHECK_NATNUM (width); |
| 6349 | |
| 6350 | if (XINT (width) == 0) |
| 6351 | vertical_type = Qnil; |
| 6352 | } |
| 6353 | |
| 6354 | if (!(EQ (vertical_type, Qnil) |
| 6355 | || EQ (vertical_type, Qleft) |
| 6356 | || EQ (vertical_type, Qright) |
| 6357 | || EQ (vertical_type, Qt))) |
| 6358 | error ("Invalid type of vertical scroll bar"); |
| 6359 | |
| 6360 | if (!EQ (w->scroll_bar_width, width) |
| 6361 | || !EQ (w->vertical_scroll_bar_type, vertical_type)) |
| 6362 | { |
| 6363 | w->scroll_bar_width = width; |
| 6364 | w->vertical_scroll_bar_type = vertical_type; |
| 6365 | |
| 6366 | adjust_window_margins (w); |
| 6367 | |
| 6368 | clear_glyph_matrix (w->current_matrix); |
| 6369 | w->window_end_valid = Qnil; |
| 6370 | |
| 6371 | ++windows_or_buffers_changed; |
| 6372 | adjust_glyphs (XFRAME (WINDOW_FRAME (w))); |
| 6373 | } |
| 6374 | |
| 6375 | return Qnil; |
| 6376 | } |
| 6377 | |
| 6378 | |
| 6379 | DEFUN ("window-scroll-bars", Fwindow_scroll_bars, Swindow_scroll_bars, |
| 6380 | 0, 1, 0, |
| 6381 | doc: /* Get width and type of scroll bars of window WINDOW. |
| 6382 | If WINDOW is omitted or nil, use the currently selected window. |
| 6383 | Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE). |
| 6384 | If WIDTH is nil or TYPE is t, the window is using the frame's corresponding |
| 6385 | value. */) |
| 6386 | (window) |
| 6387 | Lisp_Object window; |
| 6388 | { |
| 6389 | struct window *w = decode_window (window); |
| 6390 | return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w) |
| 6391 | ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w) |
| 6392 | : WINDOW_SCROLL_BAR_AREA_WIDTH (w))), |
| 6393 | Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w)), |
| 6394 | Fcons (w->vertical_scroll_bar_type, |
| 6395 | Fcons (Qnil, Qnil)))); |
| 6396 | } |
| 6397 | |
| 6398 | |
| 6399 | \f |
| 6400 | /*********************************************************************** |
| 6401 | Smooth scrolling |
| 6402 | ***********************************************************************/ |
| 6403 | |
| 6404 | DEFUN ("window-vscroll", Fwindow_vscroll, Swindow_vscroll, 0, 2, 0, |
| 6405 | doc: /* Return the amount by which WINDOW is scrolled vertically. |
| 6406 | Use the selected window if WINDOW is nil or omitted. |
| 6407 | Normally, value is a multiple of the canonical character height of WINDOW; |
| 6408 | optional second arg PIXELS_P means value is measured in pixels. */) |
| 6409 | (window, pixels_p) |
| 6410 | Lisp_Object window, pixels_p; |
| 6411 | { |
| 6412 | Lisp_Object result; |
| 6413 | struct frame *f; |
| 6414 | struct window *w; |
| 6415 | |
| 6416 | if (NILP (window)) |
| 6417 | window = selected_window; |
| 6418 | else |
| 6419 | CHECK_WINDOW (window); |
| 6420 | w = XWINDOW (window); |
| 6421 | f = XFRAME (w->frame); |
| 6422 | |
| 6423 | if (FRAME_WINDOW_P (f)) |
| 6424 | result = (NILP (pixels_p) |
| 6425 | ? FRAME_CANON_Y_FROM_PIXEL_Y (f, -w->vscroll) |
| 6426 | : make_number (-w->vscroll)); |
| 6427 | else |
| 6428 | result = make_number (0); |
| 6429 | return result; |
| 6430 | } |
| 6431 | |
| 6432 | |
| 6433 | DEFUN ("set-window-vscroll", Fset_window_vscroll, Sset_window_vscroll, |
| 6434 | 2, 3, 0, |
| 6435 | doc: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL. |
| 6436 | WINDOW nil means use the selected window. Normally, VSCROLL is a |
| 6437 | non-negative multiple of the canonical character height of WINDOW; |
| 6438 | optional third arg PIXELS_P non-nil means that VSCROLL is in pixels. |
| 6439 | If PIXELS-P is nil, VSCROLL may have to be rounded so that it |
| 6440 | corresponds to an integral number of pixels. The return value is the |
| 6441 | result of this rounding. |
| 6442 | If PIXELS-P is non-nil, the return value is VSCROLL. */) |
| 6443 | (window, vscroll, pixels_p) |
| 6444 | Lisp_Object window, vscroll, pixels_p; |
| 6445 | { |
| 6446 | struct window *w; |
| 6447 | struct frame *f; |
| 6448 | |
| 6449 | if (NILP (window)) |
| 6450 | window = selected_window; |
| 6451 | else |
| 6452 | CHECK_WINDOW (window); |
| 6453 | CHECK_NUMBER_OR_FLOAT (vscroll); |
| 6454 | |
| 6455 | w = XWINDOW (window); |
| 6456 | f = XFRAME (w->frame); |
| 6457 | |
| 6458 | if (FRAME_WINDOW_P (f)) |
| 6459 | { |
| 6460 | int old_dy = w->vscroll; |
| 6461 | |
| 6462 | w->vscroll = - (NILP (pixels_p) |
| 6463 | ? FRAME_LINE_HEIGHT (f) * XFLOATINT (vscroll) |
| 6464 | : XFLOATINT (vscroll)); |
| 6465 | w->vscroll = min (w->vscroll, 0); |
| 6466 | |
| 6467 | if (w->vscroll != old_dy) |
| 6468 | { |
| 6469 | /* Adjust glyph matrix of the frame if the virtual display |
| 6470 | area becomes larger than before. */ |
| 6471 | if (w->vscroll < 0 && w->vscroll < old_dy) |
| 6472 | adjust_glyphs (f); |
| 6473 | |
| 6474 | /* Prevent redisplay shortcuts. */ |
| 6475 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
| 6476 | } |
| 6477 | } |
| 6478 | |
| 6479 | return Fwindow_vscroll (window, pixels_p); |
| 6480 | } |
| 6481 | |
| 6482 | \f |
| 6483 | /* Call FN for all leaf windows on frame F. FN is called with the |
| 6484 | first argument being a pointer to the leaf window, and with |
| 6485 | additional argument USER_DATA. Stops when FN returns 0. */ |
| 6486 | |
| 6487 | void |
| 6488 | foreach_window (f, fn, user_data) |
| 6489 | struct frame *f; |
| 6490 | int (* fn) P_ ((struct window *, void *)); |
| 6491 | void *user_data; |
| 6492 | { |
| 6493 | foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f)), fn, user_data); |
| 6494 | } |
| 6495 | |
| 6496 | |
| 6497 | /* Helper function for foreach_window. Call FN for all leaf windows |
| 6498 | reachable from W. FN is called with the first argument being a |
| 6499 | pointer to the leaf window, and with additional argument USER_DATA. |
| 6500 | Stop when FN returns 0. Value is 0 if stopped by FN. */ |
| 6501 | |
| 6502 | static int |
| 6503 | foreach_window_1 (w, fn, user_data) |
| 6504 | struct window *w; |
| 6505 | int (* fn) P_ ((struct window *, void *)); |
| 6506 | void *user_data; |
| 6507 | { |
| 6508 | int cont; |
| 6509 | |
| 6510 | for (cont = 1; w && cont;) |
| 6511 | { |
| 6512 | if (!NILP (w->hchild)) |
| 6513 | cont = foreach_window_1 (XWINDOW (w->hchild), fn, user_data); |
| 6514 | else if (!NILP (w->vchild)) |
| 6515 | cont = foreach_window_1 (XWINDOW (w->vchild), fn, user_data); |
| 6516 | else |
| 6517 | cont = fn (w, user_data); |
| 6518 | |
| 6519 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
| 6520 | } |
| 6521 | |
| 6522 | return cont; |
| 6523 | } |
| 6524 | |
| 6525 | |
| 6526 | /* Freeze or unfreeze the window start of W unless it is a |
| 6527 | mini-window or the selected window. FREEZE_P non-null means freeze |
| 6528 | the window start. */ |
| 6529 | |
| 6530 | static int |
| 6531 | freeze_window_start (w, freeze_p) |
| 6532 | struct window *w; |
| 6533 | void *freeze_p; |
| 6534 | { |
| 6535 | if (w == XWINDOW (selected_window) |
| 6536 | || MINI_WINDOW_P (w) |
| 6537 | || (MINI_WINDOW_P (XWINDOW (selected_window)) |
| 6538 | && ! NILP (Vminibuf_scroll_window) |
| 6539 | && w == XWINDOW (Vminibuf_scroll_window))) |
| 6540 | freeze_p = NULL; |
| 6541 | |
| 6542 | w->frozen_window_start_p = freeze_p != NULL; |
| 6543 | return 1; |
| 6544 | } |
| 6545 | |
| 6546 | |
| 6547 | /* Freeze or unfreeze the window starts of all leaf windows on frame |
| 6548 | F, except the selected window and a mini-window. FREEZE_P non-zero |
| 6549 | means freeze the window start. */ |
| 6550 | |
| 6551 | void |
| 6552 | freeze_window_starts (f, freeze_p) |
| 6553 | struct frame *f; |
| 6554 | int freeze_p; |
| 6555 | { |
| 6556 | foreach_window (f, freeze_window_start, (void *) (freeze_p ? f : 0)); |
| 6557 | } |
| 6558 | |
| 6559 | \f |
| 6560 | /*********************************************************************** |
| 6561 | Initialization |
| 6562 | ***********************************************************************/ |
| 6563 | |
| 6564 | /* Return 1 if window configurations C1 and C2 |
| 6565 | describe the same state of affairs. This is used by Fequal. */ |
| 6566 | |
| 6567 | int |
| 6568 | compare_window_configurations (c1, c2, ignore_positions) |
| 6569 | Lisp_Object c1, c2; |
| 6570 | int ignore_positions; |
| 6571 | { |
| 6572 | register struct save_window_data *d1, *d2; |
| 6573 | struct Lisp_Vector *sw1, *sw2; |
| 6574 | int i; |
| 6575 | |
| 6576 | if (!WINDOW_CONFIGURATIONP (c1)) |
| 6577 | wrong_type_argument (Qwindow_configuration_p, c1); |
| 6578 | if (!WINDOW_CONFIGURATIONP (c2)) |
| 6579 | wrong_type_argument (Qwindow_configuration_p, c2); |
| 6580 | |
| 6581 | d1 = (struct save_window_data *) XVECTOR (c1); |
| 6582 | d2 = (struct save_window_data *) XVECTOR (c2); |
| 6583 | sw1 = XVECTOR (d1->saved_windows); |
| 6584 | sw2 = XVECTOR (d2->saved_windows); |
| 6585 | |
| 6586 | if (! EQ (d1->frame_cols, d2->frame_cols)) |
| 6587 | return 0; |
| 6588 | if (! EQ (d1->frame_lines, d2->frame_lines)) |
| 6589 | return 0; |
| 6590 | if (! EQ (d1->frame_menu_bar_lines, d2->frame_menu_bar_lines)) |
| 6591 | return 0; |
| 6592 | if (! EQ (d1->selected_frame, d2->selected_frame)) |
| 6593 | return 0; |
| 6594 | /* Don't compare the current_window field directly. |
| 6595 | Instead see w1_is_current and w2_is_current, below. */ |
| 6596 | if (! EQ (d1->current_buffer, d2->current_buffer)) |
| 6597 | return 0; |
| 6598 | if (! ignore_positions) |
| 6599 | { |
| 6600 | if (! EQ (d1->minibuf_scroll_window, d2->minibuf_scroll_window)) |
| 6601 | return 0; |
| 6602 | if (! EQ (d1->minibuf_selected_window, d2->minibuf_selected_window)) |
| 6603 | return 0; |
| 6604 | } |
| 6605 | /* Don't compare the root_window field. |
| 6606 | We don't require the two configurations |
| 6607 | to use the same window object, |
| 6608 | and the two root windows must be equivalent |
| 6609 | if everything else compares equal. */ |
| 6610 | if (! EQ (d1->focus_frame, d2->focus_frame)) |
| 6611 | return 0; |
| 6612 | if (! EQ (d1->min_width, d2->min_width)) |
| 6613 | return 0; |
| 6614 | if (! EQ (d1->min_height, d2->min_height)) |
| 6615 | return 0; |
| 6616 | |
| 6617 | /* Verify that the two confis have the same number of windows. */ |
| 6618 | if (sw1->size != sw2->size) |
| 6619 | return 0; |
| 6620 | |
| 6621 | for (i = 0; i < sw1->size; i++) |
| 6622 | { |
| 6623 | struct saved_window *p1, *p2; |
| 6624 | int w1_is_current, w2_is_current; |
| 6625 | |
| 6626 | p1 = SAVED_WINDOW_N (sw1, i); |
| 6627 | p2 = SAVED_WINDOW_N (sw2, i); |
| 6628 | |
| 6629 | /* Verify that the current windows in the two |
| 6630 | configurations correspond to each other. */ |
| 6631 | w1_is_current = EQ (d1->current_window, p1->window); |
| 6632 | w2_is_current = EQ (d2->current_window, p2->window); |
| 6633 | |
| 6634 | if (w1_is_current != w2_is_current) |
| 6635 | return 0; |
| 6636 | |
| 6637 | /* Verify that the corresponding windows do match. */ |
| 6638 | if (! EQ (p1->buffer, p2->buffer)) |
| 6639 | return 0; |
| 6640 | if (! EQ (p1->left_col, p2->left_col)) |
| 6641 | return 0; |
| 6642 | if (! EQ (p1->top_line, p2->top_line)) |
| 6643 | return 0; |
| 6644 | if (! EQ (p1->total_cols, p2->total_cols)) |
| 6645 | return 0; |
| 6646 | if (! EQ (p1->total_lines, p2->total_lines)) |
| 6647 | return 0; |
| 6648 | if (! EQ (p1->display_table, p2->display_table)) |
| 6649 | return 0; |
| 6650 | if (! EQ (p1->parent, p2->parent)) |
| 6651 | return 0; |
| 6652 | if (! EQ (p1->prev, p2->prev)) |
| 6653 | return 0; |
| 6654 | if (! ignore_positions) |
| 6655 | { |
| 6656 | if (! EQ (p1->hscroll, p2->hscroll)) |
| 6657 | return 0; |
| 6658 | if (!EQ (p1->min_hscroll, p2->min_hscroll)) |
| 6659 | return 0; |
| 6660 | if (! EQ (p1->start_at_line_beg, p2->start_at_line_beg)) |
| 6661 | return 0; |
| 6662 | if (NILP (Fequal (p1->start, p2->start))) |
| 6663 | return 0; |
| 6664 | if (NILP (Fequal (p1->pointm, p2->pointm))) |
| 6665 | return 0; |
| 6666 | if (NILP (Fequal (p1->mark, p2->mark))) |
| 6667 | return 0; |
| 6668 | } |
| 6669 | if (! EQ (p1->left_margin_cols, p2->left_margin_cols)) |
| 6670 | return 0; |
| 6671 | if (! EQ (p1->right_margin_cols, p2->right_margin_cols)) |
| 6672 | return 0; |
| 6673 | if (! EQ (p1->left_fringe_width, p2->left_fringe_width)) |
| 6674 | return 0; |
| 6675 | if (! EQ (p1->right_fringe_width, p2->right_fringe_width)) |
| 6676 | return 0; |
| 6677 | if (! EQ (p1->fringes_outside_margins, p2->fringes_outside_margins)) |
| 6678 | return 0; |
| 6679 | if (! EQ (p1->scroll_bar_width, p2->scroll_bar_width)) |
| 6680 | return 0; |
| 6681 | if (! EQ (p1->vertical_scroll_bar_type, p2->vertical_scroll_bar_type)) |
| 6682 | return 0; |
| 6683 | } |
| 6684 | |
| 6685 | return 1; |
| 6686 | } |
| 6687 | |
| 6688 | DEFUN ("compare-window-configurations", Fcompare_window_configurations, |
| 6689 | Scompare_window_configurations, 2, 2, 0, |
| 6690 | doc: /* Compare two window configurations as regards the structure of windows. |
| 6691 | This function ignores details such as the values of point and mark |
| 6692 | and scrolling positions. */) |
| 6693 | (x, y) |
| 6694 | Lisp_Object x, y; |
| 6695 | { |
| 6696 | if (compare_window_configurations (x, y, 1)) |
| 6697 | return Qt; |
| 6698 | return Qnil; |
| 6699 | } |
| 6700 | \f |
| 6701 | void |
| 6702 | init_window_once () |
| 6703 | { |
| 6704 | struct frame *f = make_terminal_frame (); |
| 6705 | XSETFRAME (selected_frame, f); |
| 6706 | Vterminal_frame = selected_frame; |
| 6707 | minibuf_window = f->minibuffer_window; |
| 6708 | selected_window = f->selected_window; |
| 6709 | last_nonminibuf_frame = f; |
| 6710 | |
| 6711 | window_initialized = 1; |
| 6712 | } |
| 6713 | |
| 6714 | void |
| 6715 | init_window () |
| 6716 | { |
| 6717 | Vwindow_list = Qnil; |
| 6718 | } |
| 6719 | |
| 6720 | void |
| 6721 | syms_of_window () |
| 6722 | { |
| 6723 | Qwindow_size_fixed = intern ("window-size-fixed"); |
| 6724 | staticpro (&Qwindow_size_fixed); |
| 6725 | Fset (Qwindow_size_fixed, Qnil); |
| 6726 | |
| 6727 | staticpro (&Qwindow_configuration_change_hook); |
| 6728 | Qwindow_configuration_change_hook |
| 6729 | = intern ("window-configuration-change-hook"); |
| 6730 | |
| 6731 | Qwindowp = intern ("windowp"); |
| 6732 | staticpro (&Qwindowp); |
| 6733 | |
| 6734 | Qwindow_configuration_p = intern ("window-configuration-p"); |
| 6735 | staticpro (&Qwindow_configuration_p); |
| 6736 | |
| 6737 | Qwindow_live_p = intern ("window-live-p"); |
| 6738 | staticpro (&Qwindow_live_p); |
| 6739 | |
| 6740 | Qtemp_buffer_show_hook = intern ("temp-buffer-show-hook"); |
| 6741 | staticpro (&Qtemp_buffer_show_hook); |
| 6742 | |
| 6743 | staticpro (&Vwindow_list); |
| 6744 | |
| 6745 | minibuf_selected_window = Qnil; |
| 6746 | staticpro (&minibuf_selected_window); |
| 6747 | |
| 6748 | DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function, |
| 6749 | doc: /* Non-nil means call as function to display a help buffer. |
| 6750 | The function is called with one argument, the buffer to be displayed. |
| 6751 | Used by `with-output-to-temp-buffer'. |
| 6752 | If this function is used, then it must do the entire job of showing |
| 6753 | the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */); |
| 6754 | Vtemp_buffer_show_function = Qnil; |
| 6755 | |
| 6756 | DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function, |
| 6757 | doc: /* If non-nil, function to call to handle `display-buffer'. |
| 6758 | It will receive two args, the buffer and a flag which if non-nil means |
| 6759 | that the currently selected window is not acceptable. |
| 6760 | It should choose or create a window, display the specified buffer in it, |
| 6761 | and return the window. |
| 6762 | Commands such as `switch-to-buffer-other-window' and `find-file-other-window' |
| 6763 | work using this function. */); |
| 6764 | Vdisplay_buffer_function = Qnil; |
| 6765 | |
| 6766 | DEFVAR_LISP ("even-window-heights", &Veven_window_heights, |
| 6767 | doc: /* *If non-nil, `display-buffer' should even the window heights. |
| 6768 | If nil, `display-buffer' will leave the window configuration alone. */); |
| 6769 | Veven_window_heights = Qt; |
| 6770 | |
| 6771 | DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window, |
| 6772 | doc: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */); |
| 6773 | Vminibuf_scroll_window = Qnil; |
| 6774 | |
| 6775 | DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows, |
| 6776 | doc: /* Non-nil means to use `mode-line-inactive' face in non-selected windows. |
| 6777 | If the minibuffer is active, the `minibuffer-scroll-window' mode line |
| 6778 | is displayed in the `mode-line' face. */); |
| 6779 | mode_line_in_non_selected_windows = 1; |
| 6780 | |
| 6781 | DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer, |
| 6782 | doc: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */); |
| 6783 | Vother_window_scroll_buffer = Qnil; |
| 6784 | |
| 6785 | DEFVAR_BOOL ("pop-up-frames", &pop_up_frames, |
| 6786 | doc: /* *Non-nil means `display-buffer' should make a separate frame. */); |
| 6787 | pop_up_frames = 0; |
| 6788 | |
| 6789 | DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p, |
| 6790 | doc: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */); |
| 6791 | auto_window_vscroll_p = 1; |
| 6792 | |
| 6793 | DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames, |
| 6794 | doc: /* *Non-nil means `display-buffer' should reuse frames. |
| 6795 | If the buffer in question is already displayed in a frame, raise that frame. */); |
| 6796 | display_buffer_reuse_frames = 0; |
| 6797 | |
| 6798 | DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function, |
| 6799 | doc: /* Function to call to handle automatic new frame creation. |
| 6800 | It is called with no arguments and should return a newly created frame. |
| 6801 | |
| 6802 | A typical value might be `(lambda () (new-frame pop-up-frame-alist))' |
| 6803 | where `pop-up-frame-alist' would hold the default frame parameters. */); |
| 6804 | Vpop_up_frame_function = Qnil; |
| 6805 | |
| 6806 | DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names, |
| 6807 | doc: /* *List of buffer names that should have their own special frames. |
| 6808 | Displaying a buffer with `display-buffer' or `pop-to-buffer', |
| 6809 | if its name is in this list, makes a special frame for it |
| 6810 | using `special-display-function'. See also `special-display-regexps'. |
| 6811 | |
| 6812 | An element of the list can be a list instead of just a string. |
| 6813 | There are two ways to use a list as an element: |
| 6814 | (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...) |
| 6815 | In the first case, the FRAME-PARAMETERS are pairs of the form |
| 6816 | \(PARAMETER . VALUE); these parameter values are used to create the frame. |
| 6817 | In the second case, FUNCTION is called with BUFFER as the first argument, |
| 6818 | followed by the OTHER-ARGS--it can display BUFFER in any way it likes. |
| 6819 | All this is done by the function found in `special-display-function'. |
| 6820 | |
| 6821 | If the specified frame parameters include (same-buffer . t), the |
| 6822 | buffer is displayed in the currently selected window. Otherwise, if |
| 6823 | they include (same-frame . t), the buffer is displayed in a new window |
| 6824 | in the currently selected frame. |
| 6825 | |
| 6826 | If this variable appears \"not to work\", because you add a name to it |
| 6827 | but that buffer still appears in the selected window, look at the |
| 6828 | values of `same-window-buffer-names' and `same-window-regexps'. |
| 6829 | Those variables take precedence over this one. */); |
| 6830 | Vspecial_display_buffer_names = Qnil; |
| 6831 | |
| 6832 | DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps, |
| 6833 | doc: /* *List of regexps saying which buffers should have their own special frames. |
| 6834 | When displaying a buffer with `display-buffer' or `pop-to-buffer', |
| 6835 | if any regexp in this list matches the buffer name, it makes a |
| 6836 | special frame for the buffer by calling `special-display-function'. |
| 6837 | |
| 6838 | An element of the list can be a list instead of just a string. |
| 6839 | There are two ways to use a list as an element: |
| 6840 | (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...) |
| 6841 | In the first case, the FRAME-PARAMETERS are pairs of the form |
| 6842 | \(PARAMETER . VALUE); these parameter values are used to create the frame. |
| 6843 | In the second case, FUNCTION is called with BUFFER as the first argument, |
| 6844 | followed by the OTHER-ARGS--it can display the buffer in any way it likes. |
| 6845 | All this is done by the function found in `special-display-function'. |
| 6846 | |
| 6847 | If the specified frame parameters include (same-buffer . t), the |
| 6848 | buffer is displayed in the currently selected window. Otherwise, if |
| 6849 | they include (same-frame . t), the buffer is displayed in a new window |
| 6850 | in the currently selected frame. |
| 6851 | |
| 6852 | If this variable appears \"not to work\", because you add a regexp to it |
| 6853 | but the matching buffers still appear in the selected window, look at the |
| 6854 | values of `same-window-buffer-names' and `same-window-regexps'. |
| 6855 | Those variables take precedence over this one. */); |
| 6856 | Vspecial_display_regexps = Qnil; |
| 6857 | |
| 6858 | DEFVAR_LISP ("special-display-function", &Vspecial_display_function, |
| 6859 | doc: /* Function to call to make a new frame for a special buffer. |
| 6860 | It is called with two arguments, the buffer and optional buffer specific |
| 6861 | data, and should return a window displaying that buffer. |
| 6862 | The default value normally makes a separate frame for the buffer, |
| 6863 | using `special-display-frame-alist' to specify the frame parameters. |
| 6864 | But if the buffer specific data includes (same-buffer . t) then the |
| 6865 | buffer is displayed in the current selected window. |
| 6866 | Otherwise if it includes (same-frame . t) then the buffer is displayed in |
| 6867 | a new window in the currently selected frame. |
| 6868 | |
| 6869 | A buffer is special if it is listed in `special-display-buffer-names' |
| 6870 | or matches a regexp in `special-display-regexps'. */); |
| 6871 | Vspecial_display_function = Qnil; |
| 6872 | |
| 6873 | DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names, |
| 6874 | doc: /* *List of buffer names that should appear in the selected window. |
| 6875 | Displaying one of these buffers using `display-buffer' or `pop-to-buffer' |
| 6876 | switches to it in the selected window, rather than making it appear |
| 6877 | in some other window. |
| 6878 | |
| 6879 | An element of the list can be a cons cell instead of just a string. |
| 6880 | Then the car must be a string, which specifies the buffer name. |
| 6881 | This is for compatibility with `special-display-buffer-names'; |
| 6882 | the cdr of the cons cell is ignored. |
| 6883 | |
| 6884 | See also `same-window-regexps'. */); |
| 6885 | Vsame_window_buffer_names = Qnil; |
| 6886 | |
| 6887 | DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps, |
| 6888 | doc: /* *List of regexps saying which buffers should appear in the selected window. |
| 6889 | If a buffer name matches one of these regexps, then displaying it |
| 6890 | using `display-buffer' or `pop-to-buffer' switches to it |
| 6891 | in the selected window, rather than making it appear in some other window. |
| 6892 | |
| 6893 | An element of the list can be a cons cell instead of just a string. |
| 6894 | Then the car must be a string, which specifies the buffer name. |
| 6895 | This is for compatibility with `special-display-buffer-names'; |
| 6896 | the cdr of the cons cell is ignored. |
| 6897 | |
| 6898 | See also `same-window-buffer-names'. */); |
| 6899 | Vsame_window_regexps = Qnil; |
| 6900 | |
| 6901 | DEFVAR_BOOL ("pop-up-windows", &pop_up_windows, |
| 6902 | doc: /* *Non-nil means display-buffer should make new windows. */); |
| 6903 | pop_up_windows = 1; |
| 6904 | |
| 6905 | DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines, |
| 6906 | doc: /* *Number of lines of continuity when scrolling by screenfuls. */); |
| 6907 | next_screen_context_lines = 2; |
| 6908 | |
| 6909 | DEFVAR_INT ("split-height-threshold", &split_height_threshold, |
| 6910 | doc: /* *A window must be at least this tall to be eligible for splitting by `display-buffer'. |
| 6911 | If there is only one window, it is split regardless of this value. */); |
| 6912 | split_height_threshold = 500; |
| 6913 | |
| 6914 | DEFVAR_INT ("window-min-height", &window_min_height, |
| 6915 | doc: /* *Delete any window less than this tall (including its mode line). */); |
| 6916 | window_min_height = 4; |
| 6917 | |
| 6918 | DEFVAR_INT ("window-min-width", &window_min_width, |
| 6919 | doc: /* *Delete any window less than this wide. */); |
| 6920 | window_min_width = 10; |
| 6921 | |
| 6922 | DEFVAR_LISP ("scroll-preserve-screen-position", |
| 6923 | &Vscroll_preserve_screen_position, |
| 6924 | doc: /* *Controls if scroll commands move point to keep its screen line unchanged. |
| 6925 | A value of nil means point does not keep its screen position except |
| 6926 | at the scroll margin or window boundary respectively. |
| 6927 | A value of t means point keeps its screen position if the scroll |
| 6928 | command moved it vertically out of the window, e.g. when scrolling |
| 6929 | by full screens. |
| 6930 | Any other value means point always keeps its screen position. */); |
| 6931 | Vscroll_preserve_screen_position = Qnil; |
| 6932 | |
| 6933 | DEFVAR_LISP ("window-configuration-change-hook", |
| 6934 | &Vwindow_configuration_change_hook, |
| 6935 | doc: /* Functions to call when window configuration changes. |
| 6936 | The selected frame is the one whose configuration has changed. */); |
| 6937 | Vwindow_configuration_change_hook = Qnil; |
| 6938 | |
| 6939 | defsubr (&Sselected_window); |
| 6940 | defsubr (&Sminibuffer_window); |
| 6941 | defsubr (&Swindow_minibuffer_p); |
| 6942 | defsubr (&Swindowp); |
| 6943 | defsubr (&Swindow_live_p); |
| 6944 | defsubr (&Spos_visible_in_window_p); |
| 6945 | defsubr (&Swindow_buffer); |
| 6946 | defsubr (&Swindow_height); |
| 6947 | defsubr (&Swindow_width); |
| 6948 | defsubr (&Swindow_hscroll); |
| 6949 | defsubr (&Sset_window_hscroll); |
| 6950 | defsubr (&Swindow_redisplay_end_trigger); |
| 6951 | defsubr (&Sset_window_redisplay_end_trigger); |
| 6952 | defsubr (&Swindow_edges); |
| 6953 | defsubr (&Swindow_pixel_edges); |
| 6954 | defsubr (&Swindow_inside_edges); |
| 6955 | defsubr (&Swindow_inside_pixel_edges); |
| 6956 | defsubr (&Scoordinates_in_window_p); |
| 6957 | defsubr (&Swindow_at); |
| 6958 | defsubr (&Swindow_point); |
| 6959 | defsubr (&Swindow_start); |
| 6960 | defsubr (&Swindow_end); |
| 6961 | defsubr (&Sset_window_point); |
| 6962 | defsubr (&Sset_window_start); |
| 6963 | defsubr (&Swindow_dedicated_p); |
| 6964 | defsubr (&Sset_window_dedicated_p); |
| 6965 | defsubr (&Swindow_display_table); |
| 6966 | defsubr (&Sset_window_display_table); |
| 6967 | defsubr (&Snext_window); |
| 6968 | defsubr (&Sprevious_window); |
| 6969 | defsubr (&Sother_window); |
| 6970 | defsubr (&Sget_lru_window); |
| 6971 | defsubr (&Sget_largest_window); |
| 6972 | defsubr (&Sget_buffer_window); |
| 6973 | defsubr (&Sdelete_other_windows); |
| 6974 | defsubr (&Sdelete_windows_on); |
| 6975 | defsubr (&Sreplace_buffer_in_windows); |
| 6976 | defsubr (&Sdelete_window); |
| 6977 | defsubr (&Sset_window_buffer); |
| 6978 | defsubr (&Sselect_window); |
| 6979 | defsubr (&Sspecial_display_p); |
| 6980 | defsubr (&Ssame_window_p); |
| 6981 | defsubr (&Sdisplay_buffer); |
| 6982 | defsubr (&Sforce_window_update); |
| 6983 | defsubr (&Ssplit_window); |
| 6984 | defsubr (&Senlarge_window); |
| 6985 | defsubr (&Sshrink_window); |
| 6986 | defsubr (&Sscroll_up); |
| 6987 | defsubr (&Sscroll_down); |
| 6988 | defsubr (&Sscroll_left); |
| 6989 | defsubr (&Sscroll_right); |
| 6990 | defsubr (&Sother_window_for_scrolling); |
| 6991 | defsubr (&Sscroll_other_window); |
| 6992 | defsubr (&Sminibuffer_selected_window); |
| 6993 | defsubr (&Srecenter); |
| 6994 | defsubr (&Swindow_text_height); |
| 6995 | defsubr (&Smove_to_window_line); |
| 6996 | defsubr (&Swindow_configuration_p); |
| 6997 | defsubr (&Swindow_configuration_frame); |
| 6998 | defsubr (&Sset_window_configuration); |
| 6999 | defsubr (&Scurrent_window_configuration); |
| 7000 | defsubr (&Ssave_window_excursion); |
| 7001 | defsubr (&Sset_window_margins); |
| 7002 | defsubr (&Swindow_margins); |
| 7003 | defsubr (&Sset_window_fringes); |
| 7004 | defsubr (&Swindow_fringes); |
| 7005 | defsubr (&Sset_window_scroll_bars); |
| 7006 | defsubr (&Swindow_scroll_bars); |
| 7007 | defsubr (&Swindow_vscroll); |
| 7008 | defsubr (&Sset_window_vscroll); |
| 7009 | defsubr (&Scompare_window_configurations); |
| 7010 | defsubr (&Swindow_list); |
| 7011 | } |
| 7012 | |
| 7013 | void |
| 7014 | keys_of_window () |
| 7015 | { |
| 7016 | initial_define_key (control_x_map, '1', "delete-other-windows"); |
| 7017 | initial_define_key (control_x_map, '2', "split-window"); |
| 7018 | initial_define_key (control_x_map, '0', "delete-window"); |
| 7019 | initial_define_key (control_x_map, 'o', "other-window"); |
| 7020 | initial_define_key (control_x_map, '^', "enlarge-window"); |
| 7021 | initial_define_key (control_x_map, '<', "scroll-left"); |
| 7022 | initial_define_key (control_x_map, '>', "scroll-right"); |
| 7023 | |
| 7024 | initial_define_key (global_map, Ctl ('V'), "scroll-up"); |
| 7025 | initial_define_key (meta_map, Ctl ('V'), "scroll-other-window"); |
| 7026 | initial_define_key (meta_map, 'v', "scroll-down"); |
| 7027 | |
| 7028 | initial_define_key (global_map, Ctl('L'), "recenter"); |
| 7029 | initial_define_key (meta_map, 'r', "move-to-window-line"); |
| 7030 | } |
| 7031 | |
| 7032 | /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f |
| 7033 | (do not change this comment) */ |