Commit | Line | Data |
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7ab12479 JB |
1 | /* Window creation, deletion and examination for GNU Emacs. |
2 | Does not include redisplay. | |
4a2f9c6a | 3 | Copyright (C) 1985,86,87,93,94,95,96,97,1998 Free Software Foundation, Inc. |
7ab12479 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1113d9db | 9 | the Free Software Foundation; either version 2, or (at your option) |
7ab12479 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
7ab12479 | 21 | |
18160b98 | 22 | #include <config.h> |
7ab12479 JB |
23 | #include "lisp.h" |
24 | #include "buffer.h" | |
3e4731a3 | 25 | #include "keyboard.h" |
44fa5b1e | 26 | #include "frame.h" |
7ab12479 JB |
27 | #include "window.h" |
28 | #include "commands.h" | |
29 | #include "indent.h" | |
30 | #include "termchar.h" | |
31 | #include "disptab.h" | |
dfcf069d | 32 | #include "dispextern.h" |
5500c422 GM |
33 | #include "blockinput.h" |
34 | #include "intervals.h" | |
35 | ||
6d55d620 | 36 | #ifdef HAVE_X_WINDOWS |
dfcf069d | 37 | #include "xterm.h" |
5500c422 | 38 | #endif /* HAVE_X_WINDOWS */ |
8f23f280 AI |
39 | #ifdef WINDOWSNT |
40 | #include "w32term.h" | |
41 | #endif | |
1e3c8885 EZ |
42 | #ifdef MSDOS |
43 | #include "msdos.h" | |
44 | #endif | |
5500c422 GM |
45 | |
46 | #ifndef max | |
47 | #define max(a, b) ((a) < (b) ? (b) : (a)) | |
dfcf069d | 48 | #endif |
7ab12479 | 49 | |
5500c422 | 50 | |
3f8ab7bd | 51 | Lisp_Object Qwindowp, Qwindow_live_p, Qwindow_configuration_p; |
8a37516b | 52 | Lisp_Object Qwindow_size_fixed, Qleft_bitmap_area, Qright_bitmap_area; |
233a4a2c | 53 | extern Lisp_Object Qheight, Qwidth; |
7ab12479 | 54 | |
5e14b1fc | 55 | static struct window *decode_window P_ ((Lisp_Object)); |
b7354ddf | 56 | static Lisp_Object select_window_1 P_ ((Lisp_Object, int)); |
5500c422 GM |
57 | static int count_windows P_ ((struct window *)); |
58 | static int get_leaf_windows P_ ((struct window *, struct window **, int)); | |
59 | static void window_scroll P_ ((Lisp_Object, int, int, int)); | |
60 | static void window_scroll_pixel_based P_ ((Lisp_Object, int, int, int)); | |
61 | static void window_scroll_line_based P_ ((Lisp_Object, int, int, int)); | |
233a4a2c | 62 | static int window_min_size_1 P_ ((struct window *, int)); |
f984d4fc | 63 | static int window_min_size P_ ((struct window *, int, int, int *)); |
233a4a2c | 64 | static void size_window P_ ((Lisp_Object, int, int, int)); |
f95464e4 | 65 | static int freeze_window_start P_ ((struct window *, void *)); |
f984d4fc | 66 | static int window_fixed_size_p P_ ((struct window *, int, int)); |
86c8e823 | 67 | static void enlarge_window P_ ((Lisp_Object, int, int)); |
67492200 | 68 | static Lisp_Object window_list P_ ((void)); |
f95464e4 | 69 | static int add_window_to_list P_ ((struct window *, void *)); |
118ea242 GM |
70 | static int candidate_window_p P_ ((Lisp_Object, Lisp_Object, Lisp_Object, |
71 | Lisp_Object)); | |
67492200 GM |
72 | static Lisp_Object next_window P_ ((Lisp_Object, Lisp_Object, |
73 | Lisp_Object, int)); | |
74 | static void decode_next_window_args P_ ((Lisp_Object *, Lisp_Object *, | |
75 | Lisp_Object *)); | |
f95464e4 GM |
76 | static int foreach_window_1 P_ ((struct window *, |
77 | int (* fn) (struct window *, void *), | |
78 | void *)); | |
b7354ddf | 79 | |
7ab12479 JB |
80 | /* This is the window in which the terminal's cursor should |
81 | be left when nothing is being done with it. This must | |
82 | always be a leaf window, and its buffer is selected by | |
83 | the top level editing loop at the end of each command. | |
84 | ||
85 | This value is always the same as | |
44fa5b1e | 86 | FRAME_SELECTED_WINDOW (selected_frame). */ |
7ab12479 JB |
87 | |
88 | Lisp_Object selected_window; | |
89 | ||
67492200 GM |
90 | /* A list of all windows for use by next_window and Fwindow_list. |
91 | Functions creating or deleting windows should invalidate this cache | |
92 | by setting it to nil. */ | |
93 | ||
94 | Lisp_Object Vwindow_list; | |
95 | ||
5500c422 GM |
96 | /* The mini-buffer window of the selected frame. |
97 | Note that you cannot test for mini-bufferness of an arbitrary window | |
98 | by comparing against this; but you can test for mini-bufferness of | |
7ab12479 | 99 | the selected window. */ |
5500c422 | 100 | |
7ab12479 JB |
101 | Lisp_Object minibuf_window; |
102 | ||
103 | /* Non-nil means it is the window for C-M-v to scroll | |
5500c422 GM |
104 | when the mini-buffer is selected. */ |
105 | ||
7ab12479 JB |
106 | Lisp_Object Vminibuf_scroll_window; |
107 | ||
108 | /* Non-nil means this is the buffer whose window C-M-v should scroll. */ | |
5500c422 | 109 | |
7ab12479 JB |
110 | Lisp_Object Vother_window_scroll_buffer; |
111 | ||
7ab12479 | 112 | /* Non-nil means it's function to call to display temp buffers. */ |
5500c422 | 113 | |
7ab12479 JB |
114 | Lisp_Object Vtemp_buffer_show_function; |
115 | ||
116 | /* If a window gets smaller than either of these, it is removed. */ | |
5500c422 | 117 | |
7ab12479 JB |
118 | int window_min_height; |
119 | int window_min_width; | |
120 | ||
121 | /* Nonzero implies Fdisplay_buffer should create windows. */ | |
5500c422 | 122 | |
7ab12479 JB |
123 | int pop_up_windows; |
124 | ||
44fa5b1e | 125 | /* Nonzero implies make new frames for Fdisplay_buffer. */ |
5500c422 | 126 | |
44fa5b1e | 127 | int pop_up_frames; |
7ab12479 | 128 | |
9c3da604 GM |
129 | /* Nonzero means reuse existing frames for displaying buffers. */ |
130 | ||
131 | int display_buffer_reuse_frames; | |
132 | ||
7ab12479 | 133 | /* Non-nil means use this function instead of default */ |
5500c422 | 134 | |
44fa5b1e | 135 | Lisp_Object Vpop_up_frame_function; |
7ab12479 JB |
136 | |
137 | /* Function to call to handle Fdisplay_buffer. */ | |
5500c422 | 138 | |
7ab12479 JB |
139 | Lisp_Object Vdisplay_buffer_function; |
140 | ||
a90712c2 | 141 | /* List of buffer *names* for buffers that should have their own frames. */ |
5500c422 | 142 | |
a90712c2 RS |
143 | Lisp_Object Vspecial_display_buffer_names; |
144 | ||
145 | /* List of regexps for buffer names that should have their own frames. */ | |
5500c422 | 146 | |
a90712c2 RS |
147 | Lisp_Object Vspecial_display_regexps; |
148 | ||
149 | /* Function to pop up a special frame. */ | |
5500c422 | 150 | |
a90712c2 RS |
151 | Lisp_Object Vspecial_display_function; |
152 | ||
855d8627 | 153 | /* List of buffer *names* for buffers to appear in selected window. */ |
5500c422 | 154 | |
855d8627 RS |
155 | Lisp_Object Vsame_window_buffer_names; |
156 | ||
157 | /* List of regexps for buffer names to appear in selected window. */ | |
5500c422 | 158 | |
855d8627 RS |
159 | Lisp_Object Vsame_window_regexps; |
160 | ||
a58ec57d | 161 | /* Hook run at end of temp_output_buffer_show. */ |
5500c422 | 162 | |
a58ec57d RS |
163 | Lisp_Object Qtemp_buffer_show_hook; |
164 | ||
37962e60 | 165 | /* Fdisplay_buffer always splits the largest window |
7ab12479 | 166 | if that window is more than this high. */ |
5500c422 | 167 | |
7ab12479 JB |
168 | int split_height_threshold; |
169 | ||
170 | /* Number of lines of continuity in scrolling by screenfuls. */ | |
5500c422 | 171 | |
7ab12479 JB |
172 | int next_screen_context_lines; |
173 | ||
174 | /* Incremented for each window created. */ | |
5500c422 | 175 | |
7ab12479 JB |
176 | static int sequence_number; |
177 | ||
5b03d3c0 | 178 | /* Nonzero after init_window_once has finished. */ |
5500c422 | 179 | |
5b03d3c0 RS |
180 | static int window_initialized; |
181 | ||
543f5fb1 | 182 | /* Hook to run when window config changes. */ |
5500c422 | 183 | |
543f5fb1 RS |
184 | Lisp_Object Qwindow_configuration_change_hook; |
185 | Lisp_Object Vwindow_configuration_change_hook; | |
186 | ||
9317a85d RS |
187 | /* Nonzero means scroll commands try to put point |
188 | at the same screen height as previously. */ | |
9317a85d | 189 | |
5500c422 GM |
190 | Lisp_Object Vscroll_preserve_screen_position; |
191 | ||
192 | #if 0 /* This isn't used anywhere. */ | |
91a78190 | 193 | /* Nonzero means we can split a frame even if it is "unsplittable". */ |
eddd51c2 | 194 | static int inhibit_frame_unsplittable; |
5500c422 | 195 | #endif /* 0 */ |
7d601aaa | 196 | |
7ab12479 | 197 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
dba06815 | 198 | |
9317a85d RS |
199 | extern int scroll_margin; |
200 | ||
dba06815 | 201 | extern Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
7ab12479 JB |
202 | \f |
203 | DEFUN ("windowp", Fwindowp, Swindowp, 1, 1, 0, | |
413430c5 EN |
204 | "Returns t if OBJECT is a window.") |
205 | (object) | |
206 | Lisp_Object object; | |
7ab12479 | 207 | { |
413430c5 | 208 | return WINDOWP (object) ? Qt : Qnil; |
7ab12479 JB |
209 | } |
210 | ||
806b4d9b | 211 | DEFUN ("window-live-p", Fwindow_live_p, Swindow_live_p, 1, 1, 0, |
413430c5 EN |
212 | "Returns t if OBJECT is a window which is currently visible.") |
213 | (object) | |
214 | Lisp_Object object; | |
605be8af | 215 | { |
413430c5 | 216 | return (WINDOWP (object) && ! NILP (XWINDOW (object)->buffer) ? Qt : Qnil); |
605be8af JB |
217 | } |
218 | ||
7ab12479 JB |
219 | Lisp_Object |
220 | make_window () | |
221 | { | |
cffec418 | 222 | Lisp_Object val; |
7ab12479 | 223 | register struct window *p; |
cffec418 KH |
224 | register struct Lisp_Vector *vec; |
225 | int i; | |
226 | ||
227 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct window)); | |
228 | for (i = 0; i < VECSIZE (struct window); i++) | |
229 | vec->contents[i] = Qnil; | |
230 | vec->size = VECSIZE (struct window); | |
5500c422 | 231 | p = (struct window *) vec; |
d834a2e9 KH |
232 | XSETFASTINT (p->sequence_number, ++sequence_number); |
233 | XSETFASTINT (p->left, 0); | |
234 | XSETFASTINT (p->top, 0); | |
235 | XSETFASTINT (p->height, 0); | |
236 | XSETFASTINT (p->width, 0); | |
237 | XSETFASTINT (p->hscroll, 0); | |
f984d4fc | 238 | p->orig_top = p->orig_height = Qnil; |
7ab12479 JB |
239 | p->start = Fmake_marker (); |
240 | p->pointm = Fmake_marker (); | |
d834a2e9 | 241 | XSETFASTINT (p->use_time, 0); |
44fa5b1e | 242 | p->frame = Qnil; |
7ab12479 JB |
243 | p->display_table = Qnil; |
244 | p->dedicated = Qnil; | |
5500c422 GM |
245 | p->pseudo_window_p = 0; |
246 | bzero (&p->cursor, sizeof (p->cursor)); | |
247 | bzero (&p->last_cursor, sizeof (p->last_cursor)); | |
248 | bzero (&p->phys_cursor, sizeof (p->phys_cursor)); | |
249 | p->desired_matrix = p->current_matrix = 0; | |
250 | p->phys_cursor_type = -1; | |
251 | p->must_be_updated_p = 0; | |
252 | XSETFASTINT (p->window_end_vpos, 0); | |
253 | XSETFASTINT (p->window_end_pos, 0); | |
254 | p->window_end_valid = Qnil; | |
255 | p->vscroll = 0; | |
cffec418 | 256 | XSETWINDOW (val, p); |
5500c422 | 257 | XSETFASTINT (p->last_point, 0); |
7bbb5782 | 258 | p->frozen_window_start_p = 0; |
67492200 GM |
259 | |
260 | Vwindow_list = Qnil; | |
7ab12479 JB |
261 | return val; |
262 | } | |
263 | ||
264 | DEFUN ("selected-window", Fselected_window, Sselected_window, 0, 0, 0, | |
265 | "Return the window that the cursor now appears in and commands apply to.") | |
266 | () | |
267 | { | |
268 | return selected_window; | |
269 | } | |
270 | ||
83762ba4 JB |
271 | DEFUN ("minibuffer-window", Fminibuffer_window, Sminibuffer_window, 0, 1, 0, |
272 | "Return the window used now for minibuffers.\n\ | |
273 | If the optional argument FRAME is specified, return the minibuffer window\n\ | |
274 | used by that frame.") | |
275 | (frame) | |
276 | Lisp_Object frame; | |
7ab12479 | 277 | { |
83762ba4 | 278 | if (NILP (frame)) |
1ae1a37d GM |
279 | frame = selected_frame; |
280 | CHECK_LIVE_FRAME (frame, 0); | |
83762ba4 | 281 | return FRAME_MINIBUF_WINDOW (XFRAME (frame)); |
7ab12479 JB |
282 | } |
283 | ||
605be8af | 284 | DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p, Swindow_minibuffer_p, 0, 1, 0, |
7ab12479 JB |
285 | "Returns non-nil if WINDOW is a minibuffer window.") |
286 | (window) | |
287 | Lisp_Object window; | |
288 | { | |
289 | struct window *w = decode_window (window); | |
290 | return (MINI_WINDOW_P (w) ? Qt : Qnil); | |
291 | } | |
292 | ||
293 | DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p, | |
294 | Spos_visible_in_window_p, 0, 2, 0, | |
44fa5b1e | 295 | "Return t if position POS is currently on the frame in WINDOW.\n\ |
7ab12479 JB |
296 | Returns nil if that position is scrolled vertically out of view.\n\ |
297 | POS defaults to point; WINDOW, to the selected window.") | |
298 | (pos, window) | |
299 | Lisp_Object pos, window; | |
300 | { | |
301 | register struct window *w; | |
7ab12479 JB |
302 | register int posint; |
303 | register struct buffer *buf; | |
9a132b1f GM |
304 | struct text_pos top; |
305 | Lisp_Object in_window; | |
7ab12479 | 306 | |
265a9e55 | 307 | if (NILP (pos)) |
5ce7b543 | 308 | posint = PT; |
7ab12479 JB |
309 | else |
310 | { | |
311 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
312 | posint = XINT (pos); | |
313 | } | |
314 | ||
605be8af | 315 | w = decode_window (window); |
9a132b1f | 316 | buf = XBUFFER (w->buffer); |
5500c422 | 317 | SET_TEXT_POS_FROM_MARKER (top, w->start); |
7ab12479 | 318 | |
5500c422 GM |
319 | /* If position above window, it's not visible. */ |
320 | if (posint < CHARPOS (top)) | |
9a132b1f GM |
321 | in_window = Qnil; |
322 | else if (XFASTINT (w->last_modified) >= BUF_MODIFF (buf) | |
323 | && XFASTINT (w->last_overlay_modified) >= BUF_OVERLAY_MODIFF (buf) | |
324 | && posint < BUF_Z (buf) - XFASTINT (w->window_end_pos)) | |
325 | /* If frame is up to date, and POSINT is < window end pos, use | |
326 | that info. This doesn't work for POSINT == end pos, because | |
327 | the window end pos is actually the position _after_ the last | |
328 | char in the window. */ | |
329 | in_window = Qt; | |
330 | else if (posint > BUF_ZV (buf)) | |
331 | in_window = Qnil; | |
332 | else if (CHARPOS (top) < BUF_BEGV (buf) || CHARPOS (top) > BUF_ZV (buf)) | |
333 | /* If window start is out of range, do something reasonable. */ | |
334 | in_window = Qnil; | |
7ab12479 JB |
335 | else |
336 | { | |
5500c422 | 337 | struct it it; |
5500c422 GM |
338 | start_display (&it, w, top); |
339 | move_it_to (&it, posint, 0, it.last_visible_y, -1, | |
9a132b1f GM |
340 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); |
341 | in_window = IT_CHARPOS (it) == posint ? Qt : Qnil; | |
7ab12479 | 342 | } |
9a132b1f GM |
343 | |
344 | return in_window; | |
7ab12479 JB |
345 | } |
346 | \f | |
347 | static struct window * | |
348 | decode_window (window) | |
349 | register Lisp_Object window; | |
350 | { | |
265a9e55 | 351 | if (NILP (window)) |
7ab12479 JB |
352 | return XWINDOW (selected_window); |
353 | ||
605be8af | 354 | CHECK_LIVE_WINDOW (window, 0); |
7ab12479 JB |
355 | return XWINDOW (window); |
356 | } | |
357 | ||
358 | DEFUN ("window-buffer", Fwindow_buffer, Swindow_buffer, 0, 1, 0, | |
359 | "Return the buffer that WINDOW is displaying.") | |
360 | (window) | |
361 | Lisp_Object window; | |
362 | { | |
363 | return decode_window (window)->buffer; | |
364 | } | |
365 | ||
366 | DEFUN ("window-height", Fwindow_height, Swindow_height, 0, 1, 0, | |
367 | "Return the number of lines in WINDOW (including its mode line).") | |
368 | (window) | |
369 | Lisp_Object window; | |
370 | { | |
371 | return decode_window (window)->height; | |
372 | } | |
373 | ||
374 | DEFUN ("window-width", Fwindow_width, Swindow_width, 0, 1, 0, | |
3b5908ef RS |
375 | "Return the number of display columns in WINDOW.\n\ |
376 | This is the width that is usable columns available for text in WINDOW.\n\ | |
377 | If you want to find out how many columns WINDOW takes up,\n\ | |
378 | use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).") | |
7ab12479 JB |
379 | (window) |
380 | Lisp_Object window; | |
381 | { | |
ee61d94e | 382 | return make_number (window_internal_width (decode_window (window))); |
7ab12479 JB |
383 | } |
384 | ||
385 | DEFUN ("window-hscroll", Fwindow_hscroll, Swindow_hscroll, 0, 1, 0, | |
386 | "Return the number of columns by which WINDOW is scrolled from left margin.") | |
387 | (window) | |
388 | Lisp_Object window; | |
389 | { | |
390 | return decode_window (window)->hscroll; | |
391 | } | |
392 | ||
393 | DEFUN ("set-window-hscroll", Fset_window_hscroll, Sset_window_hscroll, 2, 2, 0, | |
394 | "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\ | |
395 | NCOL should be zero or positive.") | |
396 | (window, ncol) | |
397 | register Lisp_Object window, ncol; | |
398 | { | |
399 | register struct window *w; | |
400 | ||
401 | CHECK_NUMBER (ncol, 1); | |
d834a2e9 | 402 | if (XINT (ncol) < 0) XSETFASTINT (ncol, 0); |
7ab12479 | 403 | w = decode_window (window); |
7f4161e0 | 404 | if (XINT (w->hscroll) != XINT (ncol)) |
b1599b4c GM |
405 | /* Prevent redisplay shortcuts */ |
406 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; | |
7ab12479 JB |
407 | w->hscroll = ncol; |
408 | return ncol; | |
409 | } | |
410 | ||
190eb263 RS |
411 | DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger, |
412 | Swindow_redisplay_end_trigger, 0, 1, 0, | |
413 | "Return WINDOW's redisplay end trigger value.\n\ | |
414 | See `set-window-redisplay-end-trigger' for more information.") | |
415 | (window) | |
416 | Lisp_Object window; | |
417 | { | |
418 | return decode_window (window)->redisplay_end_trigger; | |
419 | } | |
420 | ||
421 | DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger, | |
422 | Sset_window_redisplay_end_trigger, 2, 2, 0, | |
423 | "Set WINDOW's redisplay end trigger value to VALUE.\n\ | |
424 | VALUE should be a buffer position (typically a marker) or nil.\n\ | |
76854cf2 RS |
425 | If it is a buffer position, then if redisplay in WINDOW reaches a position\n\ |
426 | beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\ | |
427 | with two arguments: WINDOW, and the end trigger value.\n\ | |
428 | Afterwards the end-trigger value is reset to nil.") | |
190eb263 RS |
429 | (window, value) |
430 | register Lisp_Object window, value; | |
431 | { | |
432 | register struct window *w; | |
433 | ||
434 | w = decode_window (window); | |
435 | w->redisplay_end_trigger = value; | |
436 | return value; | |
437 | } | |
438 | ||
7ab12479 JB |
439 | DEFUN ("window-edges", Fwindow_edges, Swindow_edges, 0, 1, 0, |
440 | "Return a list of the edge coordinates of WINDOW.\n\ | |
44fa5b1e | 441 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\ |
7ab12479 JB |
442 | RIGHT is one more than the rightmost column used by WINDOW,\n\ |
443 | and BOTTOM is one more than the bottommost row used by WINDOW\n\ | |
444 | and its mode-line.") | |
445 | (window) | |
446 | Lisp_Object window; | |
447 | { | |
448 | register struct window *w = decode_window (window); | |
449 | ||
450 | return Fcons (w->left, Fcons (w->top, | |
111e5992 | 451 | Fcons (make_number (WINDOW_RIGHT_EDGE (w)), |
7ab12479 JB |
452 | Fcons (make_number (XFASTINT (w->top) |
453 | + XFASTINT (w->height)), | |
454 | Qnil)))); | |
455 | } | |
456 | ||
fbad6f9a | 457 | /* Test if the character at column *X, row *Y is within window W. |
d5783c40 JB |
458 | If it is not, return 0; |
459 | if it is in the window's text area, | |
460 | set *x and *y to its location relative to the upper left corner | |
461 | of the window, and | |
462 | return 1; | |
463 | if it is on the window's modeline, return 2; | |
464 | if it is on the border between the window and its right sibling, | |
5500c422 GM |
465 | return 3. |
466 | if it is on the window's top line, return 4; | |
fbad6f9a GM |
467 | if it is in the bitmap area to the left/right of the window, |
468 | return 5 or 6, and convert *X and *Y to window-relative corrdinates. | |
5500c422 GM |
469 | |
470 | X and Y are frame relative pixel coordinates. */ | |
471 | ||
d5783c40 JB |
472 | static int |
473 | coordinates_in_window (w, x, y) | |
474 | register struct window *w; | |
475 | register int *x, *y; | |
476 | { | |
5500c422 GM |
477 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
478 | int left_x, right_x, top_y, bottom_y; | |
b46dfc64 | 479 | int flags_area_width = FRAME_LEFT_FLAGS_AREA_WIDTH (f); |
d5783c40 | 480 | |
466539bc EZ |
481 | /* In what's below, we subtract 1 when computing right_x because we |
482 | want the rightmost pixel, which is given by left_pixel+width-1. */ | |
5500c422 GM |
483 | if (w->pseudo_window_p) |
484 | { | |
485 | left_x = 0; | |
466539bc | 486 | right_x = XFASTINT (w->width) * CANON_Y_UNIT (f) - 1; |
5500c422 GM |
487 | top_y = WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w); |
488 | bottom_y = WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w); | |
489 | } | |
490 | else | |
491 | { | |
2add4349 | 492 | left_x = (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w) |
50df5e5a | 493 | - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f)); |
466539bc | 494 | right_x = WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w) - 1; |
2add4349 | 495 | top_y = (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w) |
50df5e5a | 496 | - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f)); |
5500c422 GM |
497 | bottom_y = WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w); |
498 | } | |
37962e60 | 499 | |
5500c422 GM |
500 | if (*y < top_y |
501 | || *y >= bottom_y | |
502 | || *x < (left_x | |
503 | - flags_area_width | |
504 | - (FRAME_LEFT_SCROLL_BAR_WIDTH (f) | |
505 | * CANON_X_UNIT (f))) | |
506 | || *x > right_x + flags_area_width) | |
507 | /* Completely outside anything interesting. */ | |
508 | return 0; | |
509 | else if (WINDOW_WANTS_MODELINE_P (w) | |
510 | && *y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w)) | |
511 | /* On the mode line. */ | |
512 | return 2; | |
045dee35 GM |
513 | else if (WINDOW_WANTS_HEADER_LINE_P (w) |
514 | && *y < top_y + CURRENT_HEADER_LINE_HEIGHT (w)) | |
5500c422 GM |
515 | /* On the top line. */ |
516 | return 4; | |
76832439 EZ |
517 | /* Need to say "*x > right_x" rather than >=, since on character |
518 | terminals, the vertical line's x coordinate is right_x. */ | |
519 | else if (*x < left_x || *x > right_x) | |
fbad6f9a GM |
520 | { |
521 | /* Other lines than the mode line don't include flags areas and | |
522 | scroll bars on the left. */ | |
523 | ||
524 | /* Convert X and Y to window-relative pixel coordinates. */ | |
525 | *x -= left_x; | |
526 | *y -= top_y; | |
527 | return *x < left_x ? 5 : 6; | |
528 | } | |
76832439 | 529 | /* Here, too, "*x > right_x" is because of character terminals. */ |
5500c422 GM |
530 | else if (!w->pseudo_window_p |
531 | && !WINDOW_RIGHTMOST_P (w) | |
76832439 | 532 | && *x > right_x - CANON_X_UNIT (f)) |
5500c422 GM |
533 | /* On the border on the right side of the window? Assume that |
534 | this area begins at RIGHT_X minus a canonical char width. */ | |
535 | return 3; | |
536 | else | |
537 | { | |
538 | /* Convert X and Y to window-relative pixel coordinates. */ | |
539 | *x -= left_x; | |
540 | *y -= top_y; | |
541 | return 1; | |
542 | } | |
d5783c40 JB |
543 | } |
544 | ||
545 | DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p, | |
546 | Scoordinates_in_window_p, 2, 2, 0, | |
547 | "Return non-nil if COORDINATES are in WINDOW.\n\ | |
1113d9db | 548 | COORDINATES is a cons of the form (X . Y), X and Y being distances\n\ |
44fa5b1e | 549 | measured in characters from the upper-left corner of the frame.\n\ |
1113d9db | 550 | (0 . 0) denotes the character in the upper left corner of the\n\ |
44fa5b1e | 551 | frame.\n\ |
d5783c40 JB |
552 | If COORDINATES are in the text portion of WINDOW,\n\ |
553 | the coordinates relative to the window are returned.\n\ | |
e5d77022 | 554 | If they are in the mode line of WINDOW, `mode-line' is returned.\n\ |
045dee35 | 555 | If they are in the top mode line of WINDOW, `header-line' is returned.\n\ |
fbad6f9a GM |
556 | If they are in the bitmap-area to the left of the window,\n\ |
557 | `left-bitmap-area' is returned, if they are in the area on the right of\n\ | |
558 | the window, `right-bitmap-area' is returned.\n\ | |
d5783c40 | 559 | If they are on the border between WINDOW and its right sibling,\n\ |
e5d77022 | 560 | `vertical-line' is returned.") |
d5783c40 JB |
561 | (coordinates, window) |
562 | register Lisp_Object coordinates, window; | |
563 | { | |
5500c422 GM |
564 | struct window *w; |
565 | struct frame *f; | |
d5783c40 | 566 | int x, y; |
5500c422 | 567 | Lisp_Object lx, ly; |
d5783c40 | 568 | |
605be8af | 569 | CHECK_LIVE_WINDOW (window, 0); |
5500c422 GM |
570 | w = XWINDOW (window); |
571 | f = XFRAME (w->frame); | |
d5783c40 | 572 | CHECK_CONS (coordinates, 1); |
5500c422 GM |
573 | lx = Fcar (coordinates); |
574 | ly = Fcdr (coordinates); | |
575 | CHECK_NUMBER_OR_FLOAT (lx, 1); | |
576 | CHECK_NUMBER_OR_FLOAT (ly, 1); | |
577 | x = PIXEL_X_FROM_CANON_X (f, lx); | |
578 | y = PIXEL_Y_FROM_CANON_Y (f, ly); | |
579 | ||
580 | switch (coordinates_in_window (w, &x, &y)) | |
d5783c40 JB |
581 | { |
582 | case 0: /* NOT in window at all. */ | |
583 | return Qnil; | |
584 | ||
585 | case 1: /* In text part of window. */ | |
5500c422 GM |
586 | /* X and Y are now window relative pixel coordinates. |
587 | Convert them to canonical char units before returning | |
588 | them. */ | |
589 | return Fcons (CANON_X_FROM_PIXEL_X (f, x), | |
590 | CANON_Y_FROM_PIXEL_Y (f, y)); | |
d5783c40 JB |
591 | |
592 | case 2: /* In mode line of window. */ | |
593 | return Qmode_line; | |
37962e60 | 594 | |
d5783c40 | 595 | case 3: /* On right border of window. */ |
e5d77022 | 596 | return Qvertical_line; |
d5783c40 | 597 | |
5500c422 | 598 | case 4: |
045dee35 | 599 | return Qheader_line; |
5500c422 | 600 | |
fbad6f9a GM |
601 | case 5: |
602 | return Qleft_bitmap_area; | |
603 | ||
604 | case 6: | |
605 | return Qright_bitmap_area; | |
606 | ||
d5783c40 JB |
607 | default: |
608 | abort (); | |
609 | } | |
610 | } | |
611 | ||
67492200 GM |
612 | |
613 | /* Callback for foreach_window, used in window_from_coordinates. | |
f95464e4 GM |
614 | Check if window W contains coordinates specified by USER_DATA which |
615 | is actually a pointer to a struct check_window_data CW. | |
616 | ||
617 | Check if window W contains coordinates *CW->x and *CW->y. If it | |
618 | does, return W in *CW->window, as Lisp_Object, and return in | |
5372262f | 619 | *CW->part the part of the window under coordinates *X,*Y. Return |
f95464e4 GM |
620 | zero from this function to stop iterating over windows. */ |
621 | ||
622 | struct check_window_data | |
623 | { | |
624 | Lisp_Object *window; | |
625 | int *x, *y, *part; | |
626 | }; | |
67492200 GM |
627 | |
628 | static int | |
f95464e4 | 629 | check_window_containing (w, user_data) |
67492200 | 630 | struct window *w; |
f95464e4 | 631 | void *user_data; |
67492200 | 632 | { |
f95464e4 | 633 | struct check_window_data *cw = (struct check_window_data *) user_data; |
67492200 GM |
634 | int found; |
635 | ||
f95464e4 | 636 | found = coordinates_in_window (w, cw->x, cw->y); |
67492200 GM |
637 | if (found) |
638 | { | |
f95464e4 GM |
639 | *cw->part = found - 1; |
640 | XSETWINDOW (*cw->window, w); | |
67492200 GM |
641 | } |
642 | ||
643 | return !found; | |
644 | } | |
645 | ||
646 | ||
5500c422 GM |
647 | /* Find the window containing frame-relative pixel position X/Y and |
648 | return it as a Lisp_Object. If X, Y is on the window's modeline, | |
649 | set *PART to 1; if it is on the separating line between the window | |
650 | and its right sibling, set it to 2; otherwise set it to 0. If | |
651 | there is no window under X, Y return nil and leave *PART | |
67492200 GM |
652 | unmodified. TOOL_BAR_P non-zero means detect tool-bar windows. |
653 | ||
654 | This function was previously implemented with a loop cycling over | |
655 | windows with Fnext_window, and starting with the frame's selected | |
656 | window. It turned out that this doesn't work with an | |
657 | implementation of next_window using Vwindow_list, because | |
658 | FRAME_SELECTED_WINDOW (F) is not always contained in the window | |
659 | tree of F when this function is called asynchronously from | |
660 | note_mouse_highlight. The original loop didn't terminate in this | |
661 | case. */ | |
5500c422 | 662 | |
7ab12479 | 663 | Lisp_Object |
67492200 GM |
664 | window_from_coordinates (f, x, y, part, tool_bar_p) |
665 | struct frame *f; | |
7ab12479 | 666 | int x, y; |
d5783c40 | 667 | int *part; |
9ea173e8 | 668 | int tool_bar_p; |
7ab12479 | 669 | { |
67492200 | 670 | Lisp_Object window; |
f95464e4 | 671 | struct check_window_data cw; |
5500c422 | 672 | |
67492200 | 673 | window = Qnil; |
f95464e4 GM |
674 | cw.window = &window, cw.x = &x, cw.y = &y; cw.part = part; |
675 | foreach_window (f, check_window_containing, &cw); | |
67492200 GM |
676 | |
677 | /* If not found above, see if it's in the tool bar window, if a tool | |
678 | bar exists. */ | |
679 | if (NILP (window) | |
680 | && tool_bar_p | |
681 | && WINDOWP (f->tool_bar_window) | |
682 | && XINT (XWINDOW (f->tool_bar_window)->height) > 0 | |
683 | && coordinates_in_window (XWINDOW (f->tool_bar_window), &x, &y)) | |
5500c422 GM |
684 | { |
685 | *part = 0; | |
67492200 | 686 | window = f->tool_bar_window; |
5500c422 | 687 | } |
37962e60 | 688 | |
67492200 | 689 | return window; |
7ab12479 JB |
690 | } |
691 | ||
ab17c3f2 | 692 | DEFUN ("window-at", Fwindow_at, Swindow_at, 2, 3, 0, |
b0c33a94 | 693 | "Return window containing coordinates X and Y on FRAME.\n\ |
44fa5b1e JB |
694 | If omitted, FRAME defaults to the currently selected frame.\n\ |
695 | The top left corner of the frame is considered to be row 0,\n\ | |
95605e15 | 696 | column 0.") |
b0c33a94 RS |
697 | (x, y, frame) |
698 | Lisp_Object x, y, frame; | |
7ab12479 JB |
699 | { |
700 | int part; | |
5500c422 | 701 | struct frame *f; |
7ab12479 | 702 | |
44fa5b1e | 703 | if (NILP (frame)) |
1ae1a37d GM |
704 | frame = selected_frame; |
705 | CHECK_LIVE_FRAME (frame, 2); | |
5500c422 | 706 | f = XFRAME (frame); |
7ab12479 | 707 | |
5500c422 GM |
708 | /* Check that arguments are integers or floats. */ |
709 | CHECK_NUMBER_OR_FLOAT (x, 0); | |
710 | CHECK_NUMBER_OR_FLOAT (y, 1); | |
711 | ||
712 | return window_from_coordinates (f, | |
713 | PIXEL_X_FROM_CANON_X (f, x), | |
714 | PIXEL_Y_FROM_CANON_Y (f, y), | |
715 | &part, 0); | |
7ab12479 JB |
716 | } |
717 | ||
718 | DEFUN ("window-point", Fwindow_point, Swindow_point, 0, 1, 0, | |
719 | "Return current value of point in WINDOW.\n\ | |
720 | For a nonselected window, this is the value point would have\n\ | |
721 | if that window were selected.\n\ | |
722 | \n\ | |
723 | Note that, when WINDOW is the selected window and its buffer\n\ | |
724 | is also currently selected, the value returned is the same as (point).\n\ | |
725 | It would be more strictly correct to return the `top-level' value\n\ | |
726 | of point, outside of any save-excursion forms.\n\ | |
727 | But that is hard to define.") | |
728 | (window) | |
729 | Lisp_Object window; | |
730 | { | |
731 | register struct window *w = decode_window (window); | |
732 | ||
733 | if (w == XWINDOW (selected_window) | |
734 | && current_buffer == XBUFFER (w->buffer)) | |
735 | return Fpoint (); | |
736 | return Fmarker_position (w->pointm); | |
737 | } | |
738 | ||
739 | DEFUN ("window-start", Fwindow_start, Swindow_start, 0, 1, 0, | |
0fea6c40 RS |
740 | "Return position at which display currently starts in WINDOW.\n\ |
741 | This is updated by redisplay or by calling `set-window-start'.") | |
7ab12479 JB |
742 | (window) |
743 | Lisp_Object window; | |
744 | { | |
745 | return Fmarker_position (decode_window (window)->start); | |
746 | } | |
747 | ||
8646118f RS |
748 | /* This is text temporarily removed from the doc string below. |
749 | ||
7250968e RS |
750 | This function returns nil if the position is not currently known.\n\ |
751 | That happens when redisplay is preempted and doesn't finish.\n\ | |
752 | If in that case you want to compute where the end of the window would\n\ | |
753 | have been if redisplay had finished, do this:\n\ | |
754 | (save-excursion\n\ | |
755 | (goto-char (window-start window))\n\ | |
756 | (vertical-motion (1- (window-height window)) window)\n\ | |
8646118f RS |
757 | (point))") */ |
758 | ||
478292ed | 759 | DEFUN ("window-end", Fwindow_end, Swindow_end, 0, 2, 0, |
8646118f RS |
760 | "Return position at which display currently ends in WINDOW.\n\ |
761 | This is updated by redisplay, when it runs to completion.\n\ | |
762 | Simply changing the buffer text or setting `window-start'\n\ | |
478292ed RS |
763 | does not update this value.\n\ |
764 | If UP-TO-DATE is non-nil, compute the up-to-date position\n\ | |
765 | if it isn't already recorded.") | |
766 | (window, update) | |
767 | Lisp_Object window, update; | |
7ab12479 JB |
768 | { |
769 | Lisp_Object value; | |
770 | struct window *w = decode_window (window); | |
5a41ab94 RS |
771 | Lisp_Object buf; |
772 | ||
773 | buf = w->buffer; | |
774 | CHECK_BUFFER (buf, 0); | |
775 | ||
8646118f | 776 | #if 0 /* This change broke some things. We should make it later. */ |
7250968e RS |
777 | /* If we don't know the end position, return nil. |
778 | The user can compute it with vertical-motion if he wants to. | |
779 | It would be nicer to do it automatically, | |
780 | but that's so slow that it would probably bother people. */ | |
781 | if (NILP (w->window_end_valid)) | |
782 | return Qnil; | |
8646118f | 783 | #endif |
7250968e | 784 | |
478292ed RS |
785 | if (! NILP (update) |
786 | && ! (! NILP (w->window_end_valid) | |
787 | && XFASTINT (w->last_modified) >= MODIFF)) | |
788 | { | |
cbc099e5 GM |
789 | struct text_pos startp; |
790 | struct it it; | |
2d6d9df0 GM |
791 | |
792 | /* In case W->start is out of the range, use something | |
793 | reasonable. This situation occured when loading a file with | |
794 | `-l' containing a call to `rmail' with subsequent other | |
795 | commands. At the end, W->start happened to be BEG, while | |
cbc099e5 | 796 | rmail had already narrowed the buffer. */ |
2d6d9df0 | 797 | if (XMARKER (w->start)->charpos < BEGV) |
cbc099e5 | 798 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); |
2d6d9df0 | 799 | else if (XMARKER (w->start)->charpos > ZV) |
cbc099e5 | 800 | SET_TEXT_POS (startp, ZV, ZV_BYTE); |
2d6d9df0 | 801 | else |
cbc099e5 GM |
802 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
803 | ||
804 | /* Cannot use Fvertical_motion because that function doesn't | |
805 | cope with variable-height lines. */ | |
806 | start_display (&it, w, startp); | |
807 | move_it_vertically (&it, window_box_height (w)); | |
808 | value = make_number (IT_CHARPOS (it)); | |
478292ed RS |
809 | } |
810 | else | |
cbc099e5 | 811 | XSETINT (value, BUF_Z (XBUFFER (buf)) - XFASTINT (w->window_end_pos)); |
7ab12479 JB |
812 | |
813 | return value; | |
814 | } | |
815 | ||
816 | DEFUN ("set-window-point", Fset_window_point, Sset_window_point, 2, 2, 0, | |
817 | "Make point value in WINDOW be at position POS in WINDOW's buffer.") | |
818 | (window, pos) | |
819 | Lisp_Object window, pos; | |
820 | { | |
821 | register struct window *w = decode_window (window); | |
822 | ||
823 | CHECK_NUMBER_COERCE_MARKER (pos, 1); | |
e90c4fe6 RS |
824 | if (w == XWINDOW (selected_window) |
825 | && XBUFFER (w->buffer) == current_buffer) | |
7ab12479 JB |
826 | Fgoto_char (pos); |
827 | else | |
828 | set_marker_restricted (w->pointm, pos, w->buffer); | |
ce7fae7d | 829 | |
7ab12479 JB |
830 | return pos; |
831 | } | |
832 | ||
833 | DEFUN ("set-window-start", Fset_window_start, Sset_window_start, 2, 3, 0, | |
834 | "Make display in WINDOW start at position POS in WINDOW's buffer.\n\ | |
835 | Optional third arg NOFORCE non-nil inhibits next redisplay\n\ | |
836 | from overriding motion of point in order to display at this exact start.") | |
837 | (window, pos, noforce) | |
838 | Lisp_Object window, pos, noforce; | |
839 | { | |
840 | register struct window *w = decode_window (window); | |
841 | ||
842 | CHECK_NUMBER_COERCE_MARKER (pos, 1); | |
843 | set_marker_restricted (w->start, pos, w->buffer); | |
844 | /* this is not right, but much easier than doing what is right. */ | |
845 | w->start_at_line_beg = Qnil; | |
265a9e55 | 846 | if (NILP (noforce)) |
7ab12479 JB |
847 | w->force_start = Qt; |
848 | w->update_mode_line = Qt; | |
d834a2e9 | 849 | XSETFASTINT (w->last_modified, 0); |
3cd21523 | 850 | XSETFASTINT (w->last_overlay_modified, 0); |
62c07cc7 JB |
851 | if (!EQ (window, selected_window)) |
852 | windows_or_buffers_changed++; | |
ce7fae7d | 853 | |
7ab12479 JB |
854 | return pos; |
855 | } | |
856 | ||
857 | DEFUN ("window-dedicated-p", Fwindow_dedicated_p, Swindow_dedicated_p, | |
858 | 1, 1, 0, | |
859 | "Return WINDOW's dedicated object, usually t or nil.\n\ | |
1f18c48f | 860 | See also `set-window-dedicated-p'.") |
7ab12479 JB |
861 | (window) |
862 | Lisp_Object window; | |
863 | { | |
864 | return decode_window (window)->dedicated; | |
865 | } | |
866 | ||
d207b766 RS |
867 | DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p, |
868 | Sset_window_dedicated_p, 2, 2, 0, | |
869 | "Control whether WINDOW is dedicated to the buffer it displays.\n\ | |
870 | If it is dedicated, Emacs will not automatically change\n\ | |
871 | which buffer appears in it.\n\ | |
872 | The second argument is the new value for the dedication flag;\n\ | |
873 | non-nil means yes.") | |
7ab12479 JB |
874 | (window, arg) |
875 | Lisp_Object window, arg; | |
876 | { | |
877 | register struct window *w = decode_window (window); | |
878 | ||
265a9e55 | 879 | if (NILP (arg)) |
7ab12479 JB |
880 | w->dedicated = Qnil; |
881 | else | |
d207b766 | 882 | w->dedicated = Qt; |
7ab12479 JB |
883 | |
884 | return w->dedicated; | |
885 | } | |
886 | ||
887 | DEFUN ("window-display-table", Fwindow_display_table, Swindow_display_table, | |
888 | 0, 1, 0, | |
889 | "Return the display-table that WINDOW is using.") | |
890 | (window) | |
891 | Lisp_Object window; | |
892 | { | |
893 | return decode_window (window)->display_table; | |
894 | } | |
895 | ||
5500c422 GM |
896 | /* Get the display table for use on window W. This is either W's |
897 | display table or W's buffer's display table. Ignore the specified | |
898 | tables if they are not valid; if no valid table is specified, | |
899 | return 0. */ | |
7ab12479 | 900 | |
319315f1 | 901 | struct Lisp_Char_Table * |
7ab12479 JB |
902 | window_display_table (w) |
903 | struct window *w; | |
904 | { | |
c756cdbe GM |
905 | struct Lisp_Char_Table *dp = NULL; |
906 | ||
907 | if (DISP_TABLE_P (w->display_table)) | |
908 | dp = XCHAR_TABLE (w->display_table); | |
909 | else if (BUFFERP (w->buffer)) | |
910 | { | |
911 | struct buffer *b = XBUFFER (w->buffer); | |
912 | ||
913 | if (DISP_TABLE_P (b->display_table)) | |
914 | dp = XCHAR_TABLE (b->display_table); | |
915 | else if (DISP_TABLE_P (Vstandard_display_table)) | |
916 | dp = XCHAR_TABLE (Vstandard_display_table); | |
917 | } | |
171d003c | 918 | |
c756cdbe | 919 | return dp; |
7ab12479 JB |
920 | } |
921 | ||
3a2712f9 | 922 | DEFUN ("set-window-display-table", Fset_window_display_table, Sset_window_display_table, 2, 2, 0, |
7ab12479 JB |
923 | "Set WINDOW's display-table to TABLE.") |
924 | (window, table) | |
925 | register Lisp_Object window, table; | |
926 | { | |
927 | register struct window *w; | |
7ab12479 JB |
928 | |
929 | w = decode_window (window); | |
930 | w->display_table = table; | |
931 | return table; | |
932 | } | |
933 | \f | |
934 | /* Record info on buffer window w is displaying | |
935 | when it is about to cease to display that buffer. */ | |
dfcf069d | 936 | static void |
7ab12479 JB |
937 | unshow_buffer (w) |
938 | register struct window *w; | |
939 | { | |
12cae7c0 | 940 | Lisp_Object buf; |
b73ea88e | 941 | struct buffer *b; |
7ab12479 | 942 | |
12cae7c0 | 943 | buf = w->buffer; |
b73ea88e RS |
944 | b = XBUFFER (buf); |
945 | if (b != XMARKER (w->pointm)->buffer) | |
7ab12479 JB |
946 | abort (); |
947 | ||
573f41ab | 948 | #if 0 |
7ab12479 JB |
949 | if (w == XWINDOW (selected_window) |
950 | || ! EQ (buf, XWINDOW (selected_window)->buffer)) | |
951 | /* Do this except when the selected window's buffer | |
952 | is being removed from some other window. */ | |
573f41ab RS |
953 | #endif |
954 | /* last_window_start records the start position that this buffer | |
955 | had in the last window to be disconnected from it. | |
956 | Now that this statement is unconditional, | |
957 | it is possible for the buffer to be displayed in the | |
958 | selected window, while last_window_start reflects another | |
959 | window which was recently showing the same buffer. | |
960 | Some people might say that might be a good thing. Let's see. */ | |
b73ea88e | 961 | b->last_window_start = marker_position (w->start); |
7ab12479 JB |
962 | |
963 | /* Point in the selected window's buffer | |
964 | is actually stored in that buffer, and the window's pointm isn't used. | |
965 | So don't clobber point in that buffer. */ | |
719eaeb1 GM |
966 | if (! EQ (buf, XWINDOW (selected_window)->buffer) |
967 | /* This line helps to fix Horsley's testbug.el bug. */ | |
8801a864 KR |
968 | && !(WINDOWP (b->last_selected_window) |
969 | && w != XWINDOW (b->last_selected_window) | |
719eaeb1 | 970 | && EQ (buf, XWINDOW (b->last_selected_window)->buffer))) |
b73ea88e RS |
971 | temp_set_point_both (b, |
972 | clip_to_bounds (BUF_BEGV (b), | |
973 | XMARKER (w->pointm)->charpos, | |
974 | BUF_ZV (b)), | |
975 | clip_to_bounds (BUF_BEGV_BYTE (b), | |
976 | marker_byte_position (w->pointm), | |
977 | BUF_ZV_BYTE (b))); | |
719eaeb1 | 978 | |
8801a864 KR |
979 | if (WINDOWP (b->last_selected_window) |
980 | && w == XWINDOW (b->last_selected_window)) | |
719eaeb1 | 981 | b->last_selected_window = Qnil; |
7ab12479 JB |
982 | } |
983 | ||
984 | /* Put replacement into the window structure in place of old. */ | |
dfcf069d | 985 | static void |
7ab12479 JB |
986 | replace_window (old, replacement) |
987 | Lisp_Object old, replacement; | |
988 | { | |
989 | register Lisp_Object tem; | |
990 | register struct window *o = XWINDOW (old), *p = XWINDOW (replacement); | |
991 | ||
44fa5b1e JB |
992 | /* If OLD is its frame's root_window, then replacement is the new |
993 | root_window for that frame. */ | |
7ab12479 | 994 | |
7f4161e0 | 995 | if (EQ (old, FRAME_ROOT_WINDOW (XFRAME (o->frame)))) |
44fa5b1e | 996 | FRAME_ROOT_WINDOW (XFRAME (o->frame)) = replacement; |
7ab12479 JB |
997 | |
998 | p->left = o->left; | |
999 | p->top = o->top; | |
1000 | p->width = o->width; | |
1001 | p->height = o->height; | |
5500c422 GM |
1002 | p->desired_matrix = p->current_matrix = 0; |
1003 | p->vscroll = 0; | |
1004 | bzero (&p->cursor, sizeof (p->cursor)); | |
1005 | bzero (&p->last_cursor, sizeof (p->last_cursor)); | |
1006 | bzero (&p->phys_cursor, sizeof (p->phys_cursor)); | |
1007 | p->phys_cursor_type = -1; | |
1008 | p->must_be_updated_p = 0; | |
1009 | p->pseudo_window_p = 0; | |
1010 | XSETFASTINT (p->window_end_vpos, 0); | |
1011 | XSETFASTINT (p->window_end_pos, 0); | |
1012 | p->window_end_valid = Qnil; | |
7bbb5782 | 1013 | p->frozen_window_start_p = 0; |
f984d4fc | 1014 | p->orig_top = p->orig_height = Qnil; |
7ab12479 JB |
1015 | |
1016 | p->next = tem = o->next; | |
265a9e55 | 1017 | if (!NILP (tem)) |
7ab12479 JB |
1018 | XWINDOW (tem)->prev = replacement; |
1019 | ||
1020 | p->prev = tem = o->prev; | |
265a9e55 | 1021 | if (!NILP (tem)) |
7ab12479 JB |
1022 | XWINDOW (tem)->next = replacement; |
1023 | ||
1024 | p->parent = tem = o->parent; | |
265a9e55 | 1025 | if (!NILP (tem)) |
7ab12479 JB |
1026 | { |
1027 | if (EQ (XWINDOW (tem)->vchild, old)) | |
1028 | XWINDOW (tem)->vchild = replacement; | |
1029 | if (EQ (XWINDOW (tem)->hchild, old)) | |
1030 | XWINDOW (tem)->hchild = replacement; | |
1031 | } | |
1032 | ||
1033 | /*** Here, if replacement is a vertical combination | |
1034 | and so is its new parent, we should make replacement's | |
1035 | children be children of that parent instead. ***/ | |
1036 | } | |
1037 | ||
1038 | DEFUN ("delete-window", Fdelete_window, Sdelete_window, 0, 1, "", | |
1039 | "Remove WINDOW from the display. Default is selected window.") | |
1040 | (window) | |
1041 | register Lisp_Object window; | |
543f5fb1 RS |
1042 | { |
1043 | delete_window (window); | |
1044 | ||
1045 | if (! NILP (Vwindow_configuration_change_hook) | |
1046 | && ! NILP (Vrun_hooks)) | |
1047 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); | |
1048 | ||
1049 | return Qnil; | |
1050 | } | |
1051 | ||
5e14b1fc | 1052 | void |
543f5fb1 RS |
1053 | delete_window (window) |
1054 | register Lisp_Object window; | |
7ab12479 JB |
1055 | { |
1056 | register Lisp_Object tem, parent, sib; | |
1057 | register struct window *p; | |
1058 | register struct window *par; | |
5500c422 | 1059 | FRAME_PTR frame; |
7ab12479 | 1060 | |
605be8af JB |
1061 | /* Because this function is called by other C code on non-leaf |
1062 | windows, the CHECK_LIVE_WINDOW macro would choke inappropriately, | |
1063 | so we can't decode_window here. */ | |
265a9e55 | 1064 | if (NILP (window)) |
7ab12479 JB |
1065 | window = selected_window; |
1066 | else | |
1067 | CHECK_WINDOW (window, 0); | |
7ab12479 | 1068 | p = XWINDOW (window); |
605be8af JB |
1069 | |
1070 | /* It's okay to delete an already-deleted window. */ | |
1071 | if (NILP (p->buffer) | |
1072 | && NILP (p->hchild) | |
1073 | && NILP (p->vchild)) | |
296b535c | 1074 | return; |
605be8af | 1075 | |
7ab12479 | 1076 | parent = p->parent; |
265a9e55 | 1077 | if (NILP (parent)) |
7ab12479 JB |
1078 | error ("Attempt to delete minibuffer or sole ordinary window"); |
1079 | par = XWINDOW (parent); | |
1080 | ||
1081 | windows_or_buffers_changed++; | |
67492200 | 1082 | Vwindow_list = Qnil; |
5500c422 GM |
1083 | frame = XFRAME (WINDOW_FRAME (p)); |
1084 | FRAME_WINDOW_SIZES_CHANGED (frame) = 1; | |
7ab12479 | 1085 | |
605be8af JB |
1086 | /* Are we trying to delete any frame's selected window? */ |
1087 | { | |
0def0403 | 1088 | Lisp_Object frame, pwindow; |
605be8af | 1089 | |
0def0403 RS |
1090 | /* See if the frame's selected window is either WINDOW |
1091 | or any subwindow of it, by finding all that window's parents | |
1092 | and comparing each one with WINDOW. */ | |
1093 | frame = WINDOW_FRAME (XWINDOW (window)); | |
1094 | pwindow = FRAME_SELECTED_WINDOW (XFRAME (frame)); | |
1095 | ||
1096 | while (!NILP (pwindow)) | |
1097 | { | |
1098 | if (EQ (window, pwindow)) | |
1099 | break; | |
1100 | pwindow = XWINDOW (pwindow)->parent; | |
1101 | } | |
1102 | ||
1103 | if (EQ (window, pwindow)) | |
605be8af | 1104 | { |
89bca612 RS |
1105 | Lisp_Object alternative; |
1106 | alternative = Fnext_window (window, Qlambda, Qnil); | |
605be8af JB |
1107 | |
1108 | /* If we're about to delete the selected window on the | |
1109 | selected frame, then we should use Fselect_window to select | |
1110 | the new window. On the other hand, if we're about to | |
1111 | delete the selected window on any other frame, we shouldn't do | |
1112 | anything but set the frame's selected_window slot. */ | |
1113 | if (EQ (window, selected_window)) | |
1114 | Fselect_window (alternative); | |
1115 | else | |
0def0403 | 1116 | FRAME_SELECTED_WINDOW (XFRAME (frame)) = alternative; |
605be8af JB |
1117 | } |
1118 | } | |
7ab12479 JB |
1119 | |
1120 | tem = p->buffer; | |
1121 | /* tem is null for dummy parent windows | |
1122 | (which have inferiors but not any contents themselves) */ | |
265a9e55 | 1123 | if (!NILP (tem)) |
7ab12479 JB |
1124 | { |
1125 | unshow_buffer (p); | |
1126 | unchain_marker (p->pointm); | |
1127 | unchain_marker (p->start); | |
7ab12479 JB |
1128 | } |
1129 | ||
05e71564 GM |
1130 | /* Free window glyph matrices. It is sure that they are allocated |
1131 | again when ADJUST_GLYPHS is called. Block input so that expose | |
1132 | events and other events that access glyph matrices are not | |
1133 | processed while we are changing them. */ | |
1134 | BLOCK_INPUT; | |
5500c422 GM |
1135 | free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (frame))); |
1136 | ||
7ab12479 | 1137 | tem = p->next; |
265a9e55 | 1138 | if (!NILP (tem)) |
7ab12479 JB |
1139 | XWINDOW (tem)->prev = p->prev; |
1140 | ||
1141 | tem = p->prev; | |
265a9e55 | 1142 | if (!NILP (tem)) |
7ab12479 JB |
1143 | XWINDOW (tem)->next = p->next; |
1144 | ||
1145 | if (EQ (window, par->hchild)) | |
1146 | par->hchild = p->next; | |
1147 | if (EQ (window, par->vchild)) | |
1148 | par->vchild = p->next; | |
1149 | ||
1150 | /* Find one of our siblings to give our space to. */ | |
1151 | sib = p->prev; | |
265a9e55 | 1152 | if (NILP (sib)) |
7ab12479 JB |
1153 | { |
1154 | /* If p gives its space to its next sibling, that sibling needs | |
1155 | to have its top/left side pulled back to where p's is. | |
1156 | set_window_{height,width} will re-position the sibling's | |
1157 | children. */ | |
1158 | sib = p->next; | |
7f4161e0 JB |
1159 | XWINDOW (sib)->top = p->top; |
1160 | XWINDOW (sib)->left = p->left; | |
7ab12479 JB |
1161 | } |
1162 | ||
1163 | /* Stretch that sibling. */ | |
265a9e55 | 1164 | if (!NILP (par->vchild)) |
7ab12479 JB |
1165 | set_window_height (sib, |
1166 | XFASTINT (XWINDOW (sib)->height) + XFASTINT (p->height), | |
1167 | 1); | |
265a9e55 | 1168 | if (!NILP (par->hchild)) |
7ab12479 JB |
1169 | set_window_width (sib, |
1170 | XFASTINT (XWINDOW (sib)->width) + XFASTINT (p->width), | |
1171 | 1); | |
1172 | ||
1173 | /* If parent now has only one child, | |
1174 | put the child into the parent's place. */ | |
7ab12479 | 1175 | tem = par->hchild; |
265a9e55 | 1176 | if (NILP (tem)) |
7ab12479 | 1177 | tem = par->vchild; |
265a9e55 | 1178 | if (NILP (XWINDOW (tem)->next)) |
7ab12479 | 1179 | replace_window (parent, tem); |
605be8af JB |
1180 | |
1181 | /* Since we may be deleting combination windows, we must make sure that | |
1182 | not only p but all its children have been marked as deleted. */ | |
1183 | if (! NILP (p->hchild)) | |
1184 | delete_all_subwindows (XWINDOW (p->hchild)); | |
1185 | else if (! NILP (p->vchild)) | |
1186 | delete_all_subwindows (XWINDOW (p->vchild)); | |
1187 | ||
1188 | /* Mark this window as deleted. */ | |
1189 | p->buffer = p->hchild = p->vchild = Qnil; | |
5500c422 GM |
1190 | |
1191 | /* Adjust glyph matrices. */ | |
1192 | adjust_glyphs (frame); | |
05e71564 | 1193 | UNBLOCK_INPUT; |
7ab12479 | 1194 | } |
67492200 GM |
1195 | |
1196 | ||
7ab12479 | 1197 | \f |
67492200 GM |
1198 | /*********************************************************************** |
1199 | Window List | |
1200 | ***********************************************************************/ | |
1201 | ||
f95464e4 GM |
1202 | /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object |
1203 | pointer. This is a callback function for foreach_window, used in | |
1204 | function window_list. */ | |
67492200 GM |
1205 | |
1206 | static int | |
f95464e4 | 1207 | add_window_to_list (w, user_data) |
67492200 | 1208 | struct window *w; |
f95464e4 | 1209 | void *user_data; |
67492200 | 1210 | { |
f95464e4 | 1211 | Lisp_Object *list = (Lisp_Object *) user_data; |
67492200 GM |
1212 | Lisp_Object window; |
1213 | XSETWINDOW (window, w); | |
212116d6 | 1214 | *list = Fcons (window, *list); |
67492200 GM |
1215 | return 1; |
1216 | } | |
1217 | ||
1218 | ||
1219 | /* Return a list of all windows, for use by next_window. If | |
1220 | Vwindow_list is a list, return that list. Otherwise, build a new | |
1221 | list, cache it in Vwindow_list, and return that. */ | |
1222 | ||
1223 | static Lisp_Object | |
1224 | window_list () | |
1225 | { | |
1226 | if (!CONSP (Vwindow_list)) | |
1227 | { | |
1228 | Lisp_Object tail; | |
212116d6 | 1229 | |
67492200 GM |
1230 | Vwindow_list = Qnil; |
1231 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) | |
212116d6 GM |
1232 | { |
1233 | Lisp_Object args[2]; | |
1234 | ||
1235 | /* We are visiting windows in canonical order, and add | |
1236 | new windows at the front of args[1], which means we | |
1237 | have to reverse this list at the end. */ | |
1238 | args[1] = Qnil; | |
1239 | foreach_window (XFRAME (XCAR (tail)), add_window_to_list, &args[1]); | |
1240 | args[0] = Vwindow_list; | |
1241 | args[1] = Fnreverse (args[1]); | |
1242 | Vwindow_list = Fnconc (2, args); | |
1243 | } | |
67492200 GM |
1244 | } |
1245 | ||
1246 | return Vwindow_list; | |
1247 | } | |
1248 | ||
1249 | ||
118ea242 GM |
1250 | /* Value is non-zero if WINDOW satisfies the constraints given by |
1251 | OWINDOW, MINIBUF and ALL_FRAMES. | |
67492200 | 1252 | |
118ea242 GM |
1253 | MINIBUF t means WINDOW may be minibuffer windows. |
1254 | `lambda' means WINDOW may not be a minibuffer window. | |
1255 | a window means a specific minibuffer window | |
67492200 | 1256 | |
118ea242 GM |
1257 | ALL_FRAMES t means search all frames, |
1258 | nil means search just current frame, | |
1259 | `visible' means search just visible frames, | |
1260 | 0 means search visible and iconified frames, | |
1261 | a window means search the frame that window belongs to, | |
1262 | a frame means consider windows on that frame, only. */ | |
67492200 GM |
1263 | |
1264 | static int | |
118ea242 GM |
1265 | candidate_window_p (window, owindow, minibuf, all_frames) |
1266 | Lisp_Object window, owindow, minibuf, all_frames; | |
67492200 GM |
1267 | { |
1268 | struct window *w = XWINDOW (window); | |
1269 | struct frame *f = XFRAME (w->frame); | |
1270 | int candidate_p = 1; | |
1271 | ||
1272 | if (!BUFFERP (w->buffer)) | |
1273 | candidate_p = 0; | |
1274 | else if (MINI_WINDOW_P (w) | |
1275 | && (EQ (minibuf, Qlambda) | |
1276 | || (WINDOWP (minibuf) && !EQ (minibuf, window)))) | |
1277 | { | |
1278 | /* If MINIBUF is `lambda' don't consider any mini-windows. | |
1279 | If it is a window, consider only that one. */ | |
1280 | candidate_p = 0; | |
1281 | } | |
118ea242 GM |
1282 | else if (EQ (all_frames, Qt)) |
1283 | candidate_p = 1; | |
67492200 | 1284 | else if (NILP (all_frames)) |
118ea242 GM |
1285 | { |
1286 | xassert (WINDOWP (owindow)); | |
1287 | candidate_p = EQ (w->frame, XWINDOW (owindow)->frame); | |
1288 | } | |
67492200 GM |
1289 | else if (EQ (all_frames, Qvisible)) |
1290 | { | |
1291 | FRAME_SAMPLE_VISIBILITY (f); | |
1292 | candidate_p = FRAME_VISIBLE_P (f); | |
1293 | } | |
1294 | else if (INTEGERP (all_frames) && XINT (all_frames) == 0) | |
1295 | { | |
1296 | FRAME_SAMPLE_VISIBILITY (f); | |
1297 | candidate_p = FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f); | |
1298 | } | |
67492200 GM |
1299 | else if (WINDOWP (all_frames)) |
1300 | candidate_p = (EQ (FRAME_MINIBUF_WINDOW (f), all_frames) | |
1301 | || EQ (XWINDOW (all_frames)->frame, w->frame) | |
1302 | || EQ (XWINDOW (all_frames)->frame, FRAME_FOCUS_FRAME (f))); | |
118ea242 GM |
1303 | else if (FRAMEP (all_frames)) |
1304 | candidate_p = EQ (all_frames, w->frame); | |
67492200 GM |
1305 | |
1306 | return candidate_p; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | /* Decode arguments as allowed by Fnext_window, Fprevious_window, and | |
1311 | Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and | |
1312 | ALL_FRAMES. */ | |
1313 | ||
1314 | static void | |
1315 | decode_next_window_args (window, minibuf, all_frames) | |
1316 | Lisp_Object *window, *minibuf, *all_frames; | |
1317 | { | |
1318 | if (NILP (*window)) | |
1319 | *window = selected_window; | |
1320 | else | |
1321 | CHECK_LIVE_WINDOW (*window, 0); | |
1322 | ||
1323 | /* MINIBUF nil may or may not include minibuffers. Decide if it | |
1324 | does. */ | |
1325 | if (NILP (*minibuf)) | |
1326 | *minibuf = minibuf_level ? minibuf_window : Qlambda; | |
1327 | else if (!EQ (*minibuf, Qt)) | |
1328 | *minibuf = Qlambda; | |
1329 | ||
1330 | /* Now *MINIBUF can be t => count all minibuffer windows, `lambda' | |
1331 | => count none of them, or a specific minibuffer window (the | |
1332 | active one) to count. */ | |
1333 | ||
1334 | /* ALL_FRAMES nil doesn't specify which frames to include. */ | |
1335 | if (NILP (*all_frames)) | |
1336 | *all_frames = (!EQ (*minibuf, Qlambda) | |
1337 | ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window)->frame)) | |
1338 | : Qnil); | |
1339 | else if (EQ (*all_frames, Qvisible)) | |
1340 | ; | |
1341 | else if (XFASTINT (*all_frames) == 0) | |
1342 | ; | |
1343 | else if (FRAMEP (*all_frames)) | |
1344 | ; | |
1345 | else if (!EQ (*all_frames, Qt)) | |
1346 | *all_frames = Qnil; | |
1347 | ||
1348 | /* Now *ALL_FRAMES is t meaning search all frames, nil meaning | |
1349 | search just current frame, `visible' meaning search just visible | |
1350 | frames, 0 meaning search visible and iconified frames, or a | |
1351 | window, meaning search the frame that window belongs to, or a | |
1352 | frame, meaning consider windows on that frame, only. */ | |
1353 | } | |
1354 | ||
1355 | ||
1356 | /* Return the next or previous window of WINDOW in canonical ordering | |
1357 | of windows. NEXT_P non-zero means return the next window. See the | |
1358 | documentation string of next-window for the meaning of MINIBUF and | |
1359 | ALL_FRAMES. */ | |
1360 | ||
1361 | static Lisp_Object | |
1362 | next_window (window, minibuf, all_frames, next_p) | |
1363 | Lisp_Object window, minibuf, all_frames; | |
1364 | int next_p; | |
1365 | { | |
1366 | decode_next_window_args (&window, &minibuf, &all_frames); | |
1367 | ||
1368 | /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just | |
1369 | return the first window on the frame. */ | |
1370 | if (FRAMEP (all_frames) | |
1371 | && !EQ (all_frames, XWINDOW (window)->frame)) | |
1372 | return Fframe_first_window (all_frames); | |
1373 | ||
212116d6 | 1374 | if (next_p) |
67492200 GM |
1375 | { |
1376 | Lisp_Object list; | |
1377 | ||
1378 | /* Find WINDOW in the list of all windows. */ | |
1379 | list = Fmemq (window, window_list ()); | |
1380 | ||
1381 | /* Scan forward from WINDOW to the end of the window list. */ | |
1382 | if (CONSP (list)) | |
1383 | for (list = XCDR (list); CONSP (list); list = XCDR (list)) | |
118ea242 | 1384 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
67492200 GM |
1385 | break; |
1386 | ||
1387 | /* Scan from the start of the window list up to WINDOW. */ | |
1388 | if (!CONSP (list)) | |
1389 | for (list = Vwindow_list; | |
1390 | CONSP (list) && !EQ (XCAR (list), window); | |
1391 | list = XCDR (list)) | |
118ea242 | 1392 | if (candidate_window_p (XCAR (list), window, minibuf, all_frames)) |
67492200 GM |
1393 | break; |
1394 | ||
1395 | if (CONSP (list)) | |
1396 | window = XCAR (list); | |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | Lisp_Object candidate, list; | |
1401 | ||
1402 | /* Scan through the list of windows for candidates. If there are | |
1403 | candidate windows in front of WINDOW, the last one of these | |
1404 | is the one we want. If there are candidates following WINDOW | |
1405 | in the list, again the last one of these is the one we want. */ | |
1406 | candidate = Qnil; | |
1407 | for (list = window_list (); CONSP (list); list = XCDR (list)) | |
1408 | { | |
1409 | if (EQ (XCAR (list), window)) | |
1410 | { | |
1411 | if (WINDOWP (candidate)) | |
1412 | break; | |
1413 | } | |
118ea242 GM |
1414 | else if (candidate_window_p (XCAR (list), window, minibuf, |
1415 | all_frames)) | |
67492200 GM |
1416 | candidate = XCAR (list); |
1417 | } | |
1418 | ||
1419 | if (WINDOWP (candidate)) | |
1420 | window = candidate; | |
1421 | } | |
1422 | ||
1423 | return window; | |
1424 | } | |
7ab12479 | 1425 | |
7ab12479 | 1426 | |
26f6279d JB |
1427 | /* This comment supplies the doc string for `next-window', |
1428 | for make-docfile to see. We cannot put this in the real DEFUN | |
1429 | due to limits in the Unix cpp. | |
1430 | ||
1431 | DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0, | |
7ab12479 | 1432 | "Return next window after WINDOW in canonical ordering of windows.\n\ |
d5783c40 JB |
1433 | If omitted, WINDOW defaults to the selected window.\n\ |
1434 | \n\ | |
1435 | Optional second arg MINIBUF t means count the minibuffer window even\n\ | |
1436 | if not active. MINIBUF nil or omitted means count the minibuffer iff\n\ | |
1437 | it is active. MINIBUF neither t nor nil means not to count the\n\ | |
1438 | minibuffer even if it is active.\n\ | |
1439 | \n\ | |
44fa5b1e JB |
1440 | Several frames may share a single minibuffer; if the minibuffer\n\ |
1441 | counts, all windows on all frames that share that minibuffer count\n\ | |
ed160f1f | 1442 | too. Therefore, `next-window' can be used to iterate through the\n\ |
44fa5b1e JB |
1443 | set of windows even when the minibuffer is on another frame. If the\n\ |
1444 | minibuffer does not count, only windows from WINDOW's frame count.\n\ | |
d5783c40 | 1445 | \n\ |
44fa5b1e JB |
1446 | Optional third arg ALL-FRAMES t means include windows on all frames.\n\ |
1447 | ALL-FRAMES nil or omitted means cycle within the frames as specified\n\ | |
89bca612 | 1448 | above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\ |
f812f9c6 | 1449 | ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\ |
1f4c5d09 | 1450 | If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\ |
89bca612 | 1451 | Anything else means restrict to WINDOW's frame.\n\ |
dbc4e1c1 JB |
1452 | \n\ |
1453 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\ | |
1454 | `next-window' to iterate through the entire cycle of acceptable\n\ | |
1455 | windows, eventually ending up back at the window you started with.\n\ | |
1456 | `previous-window' traverses the same cycle, in the reverse order.") | |
26f6279d JB |
1457 | (window, minibuf, all_frames) */ |
1458 | ||
1459 | DEFUN ("next-window", Fnext_window, Snext_window, 0, 3, 0, | |
1460 | 0) | |
44fa5b1e | 1461 | (window, minibuf, all_frames) |
67492200 | 1462 | Lisp_Object window, minibuf, all_frames; |
7ab12479 | 1463 | { |
67492200 | 1464 | return next_window (window, minibuf, all_frames, 1); |
7ab12479 JB |
1465 | } |
1466 | ||
67492200 | 1467 | |
26f6279d JB |
1468 | /* This comment supplies the doc string for `previous-window', |
1469 | for make-docfile to see. We cannot put this in the real DEFUN | |
1470 | due to limits in the Unix cpp. | |
1471 | ||
1472 | DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0, | |
5c4d25a6 | 1473 | "Return the window preceding WINDOW in canonical ordering of windows.\n\ |
d5783c40 JB |
1474 | If omitted, WINDOW defaults to the selected window.\n\ |
1475 | \n\ | |
1476 | Optional second arg MINIBUF t means count the minibuffer window even\n\ | |
1477 | if not active. MINIBUF nil or omitted means count the minibuffer iff\n\ | |
1478 | it is active. MINIBUF neither t nor nil means not to count the\n\ | |
1479 | minibuffer even if it is active.\n\ | |
1480 | \n\ | |
44fa5b1e JB |
1481 | Several frames may share a single minibuffer; if the minibuffer\n\ |
1482 | counts, all windows on all frames that share that minibuffer count\n\ | |
ed160f1f | 1483 | too. Therefore, `previous-window' can be used to iterate through\n\ |
44fa5b1e | 1484 | the set of windows even when the minibuffer is on another frame. If\n\ |
ed160f1f | 1485 | the minibuffer does not count, only windows from WINDOW's frame count\n\ |
d5783c40 | 1486 | \n\ |
44fa5b1e JB |
1487 | Optional third arg ALL-FRAMES t means include windows on all frames.\n\ |
1488 | ALL-FRAMES nil or omitted means cycle within the frames as specified\n\ | |
89bca612 | 1489 | above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\ |
f812f9c6 | 1490 | ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\ |
1f4c5d09 | 1491 | If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\ |
89bca612 | 1492 | Anything else means restrict to WINDOW's frame.\n\ |
dbc4e1c1 JB |
1493 | \n\ |
1494 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\ | |
1495 | `previous-window' to iterate through the entire cycle of acceptable\n\ | |
1496 | windows, eventually ending up back at the window you started with.\n\ | |
1497 | `next-window' traverses the same cycle, in the reverse order.") | |
26f6279d JB |
1498 | (window, minibuf, all_frames) */ |
1499 | ||
1500 | ||
1501 | DEFUN ("previous-window", Fprevious_window, Sprevious_window, 0, 3, 0, | |
1502 | 0) | |
44fa5b1e | 1503 | (window, minibuf, all_frames) |
67492200 | 1504 | Lisp_Object window, minibuf, all_frames; |
7ab12479 | 1505 | { |
67492200 | 1506 | return next_window (window, minibuf, all_frames, 0); |
7ab12479 JB |
1507 | } |
1508 | ||
67492200 | 1509 | |
62c07cc7 | 1510 | DEFUN ("other-window", Fother_window, Sother_window, 1, 2, "p", |
44fa5b1e JB |
1511 | "Select the ARG'th different window on this frame.\n\ |
1512 | All windows on current frame are arranged in a cyclic order.\n\ | |
7ab12479 JB |
1513 | This command selects the window ARG steps away in that order.\n\ |
1514 | A negative ARG moves in the opposite order. If the optional second\n\ | |
44fa5b1e | 1515 | argument ALL_FRAMES is non-nil, cycle through all frames.") |
413430c5 | 1516 | (arg, all_frames) |
67492200 | 1517 | Lisp_Object arg, all_frames; |
7ab12479 | 1518 | { |
67492200 GM |
1519 | Lisp_Object window; |
1520 | int i; | |
7ab12479 | 1521 | |
413430c5 | 1522 | CHECK_NUMBER (arg, 0); |
67492200 GM |
1523 | window = selected_window; |
1524 | ||
1525 | for (i = XINT (arg); i > 0; --i) | |
1526 | window = Fnext_window (window, Qnil, all_frames); | |
1527 | for (; i < 0; ++i) | |
1528 | window = Fprevious_window (window, Qnil, all_frames); | |
1529 | ||
1530 | Fselect_window (window); | |
7ab12479 JB |
1531 | return Qnil; |
1532 | } | |
67492200 GM |
1533 | |
1534 | ||
1535 | DEFUN ("window-list", Fwindow_list, Swindow_list, 0, 3, 0, | |
118ea242 | 1536 | "Return a list of windows in canonical ordering.\n\ |
67492200 GM |
1537 | Arguments are like for `next-window'.") |
1538 | (window, minibuf, all_frames) | |
069f5950 | 1539 | Lisp_Object window, minibuf, all_frames; |
67492200 GM |
1540 | { |
1541 | Lisp_Object tail, list; | |
1542 | ||
1543 | decode_next_window_args (&window, &minibuf, &all_frames); | |
1544 | list = Qnil; | |
1545 | ||
1546 | for (tail = window_list (); CONSP (tail); tail = XCDR (tail)) | |
118ea242 | 1547 | if (candidate_window_p (XCAR (tail), window, minibuf, all_frames)) |
67492200 GM |
1548 | list = Fcons (XCAR (tail), list); |
1549 | ||
118ea242 | 1550 | return Fnreverse (list); |
67492200 GM |
1551 | } |
1552 | ||
1553 | ||
7ab12479 JB |
1554 | \f |
1555 | /* Look at all windows, performing an operation specified by TYPE | |
1556 | with argument OBJ. | |
75d8f668 | 1557 | If FRAMES is Qt, look at all frames; |
75d8f668 | 1558 | Qnil, look at just the selected frame; |
89bca612 | 1559 | Qvisible, look at visible frames; |
75d8f668 | 1560 | a frame, just look at windows on that frame. |
7ab12479 JB |
1561 | If MINI is non-zero, perform the operation on minibuffer windows too. |
1562 | */ | |
1563 | ||
1564 | enum window_loop | |
1565 | { | |
1566 | WINDOW_LOOP_UNUSED, | |
1567 | GET_BUFFER_WINDOW, /* Arg is buffer */ | |
1568 | GET_LRU_WINDOW, /* Arg is t for full-width windows only */ | |
1569 | DELETE_OTHER_WINDOWS, /* Arg is window not to delete */ | |
1570 | DELETE_BUFFER_WINDOWS, /* Arg is buffer */ | |
1571 | GET_LARGEST_WINDOW, | |
3f8ab7bd RS |
1572 | UNSHOW_BUFFER, /* Arg is buffer */ |
1573 | CHECK_ALL_WINDOWS | |
7ab12479 JB |
1574 | }; |
1575 | ||
1576 | static Lisp_Object | |
44fa5b1e | 1577 | window_loop (type, obj, mini, frames) |
7ab12479 | 1578 | enum window_loop type; |
118ea242 | 1579 | Lisp_Object obj, frames; |
7ab12479 JB |
1580 | int mini; |
1581 | { | |
118ea242 GM |
1582 | Lisp_Object window, windows, best_window, frame_arg; |
1583 | struct frame *f; | |
ffdc852d | 1584 | struct gcpro gcpro1; |
118ea242 | 1585 | |
44fa5b1e JB |
1586 | /* If we're only looping through windows on a particular frame, |
1587 | frame points to that frame. If we're looping through windows | |
1588 | on all frames, frame is 0. */ | |
1589 | if (FRAMEP (frames)) | |
118ea242 | 1590 | f = XFRAME (frames); |
44fa5b1e | 1591 | else if (NILP (frames)) |
118ea242 | 1592 | f = SELECTED_FRAME (); |
7ab12479 | 1593 | else |
118ea242 GM |
1594 | f = NULL; |
1595 | ||
1596 | if (f) | |
89bca612 | 1597 | frame_arg = Qlambda; |
f812f9c6 RS |
1598 | else if (XFASTINT (frames) == 0) |
1599 | frame_arg = frames; | |
89bca612 RS |
1600 | else if (EQ (frames, Qvisible)) |
1601 | frame_arg = frames; | |
118ea242 GM |
1602 | else |
1603 | frame_arg = Qt; | |
7ab12479 | 1604 | |
89bca612 RS |
1605 | /* frame_arg is Qlambda to stick to one frame, |
1606 | Qvisible to consider all visible frames, | |
1607 | or Qt otherwise. */ | |
1608 | ||
7ab12479 | 1609 | /* Pick a window to start with. */ |
017b2bad | 1610 | if (WINDOWP (obj)) |
118ea242 GM |
1611 | window = obj; |
1612 | else if (f) | |
1613 | window = FRAME_SELECTED_WINDOW (f); | |
7ab12479 | 1614 | else |
118ea242 | 1615 | window = FRAME_SELECTED_WINDOW (SELECTED_FRAME ()); |
4b206065 JB |
1616 | |
1617 | /* Figure out the last window we're going to mess with. Since | |
1618 | Fnext_window, given the same options, is guaranteed to go in a | |
1619 | ring, we can just use Fprevious_window to find the last one. | |
1620 | ||
1621 | We can't just wait until we hit the first window again, because | |
1622 | it might be deleted. */ | |
1623 | ||
118ea242 GM |
1624 | windows = Fwindow_list (window, mini ? Qt : Qnil, frame_arg); |
1625 | GCPRO1 (windows); | |
7ab12479 | 1626 | best_window = Qnil; |
118ea242 GM |
1627 | |
1628 | for (; CONSP (windows); windows = CDR (windows)) | |
7ab12479 | 1629 | { |
118ea242 GM |
1630 | struct window *w; |
1631 | ||
1632 | window = XCAR (windows); | |
1633 | w = XWINDOW (window); | |
1634 | ||
1635 | /* Note that we do not pay attention here to whether the frame | |
1636 | is visible, since Fwindow_list skips non-visible frames if | |
1637 | that is desired, under the control of frame_arg. */ | |
1638 | if (!MINI_WINDOW_P (w) | |
65a04b96 RS |
1639 | /* For UNSHOW_BUFFER, we must always consider all windows. */ |
1640 | || type == UNSHOW_BUFFER | |
7ab12479 JB |
1641 | || (mini && minibuf_level > 0)) |
1642 | switch (type) | |
1643 | { | |
1644 | case GET_BUFFER_WINDOW: | |
118ea242 | 1645 | if (EQ (w->buffer, obj) |
5c204627 RS |
1646 | /* Don't find any minibuffer window |
1647 | except the one that is currently in use. */ | |
118ea242 GM |
1648 | && (MINI_WINDOW_P (w) |
1649 | ? EQ (window, minibuf_window) | |
1650 | : 1)) | |
1651 | { | |
1652 | UNGCPRO; | |
1653 | return window; | |
1654 | } | |
7ab12479 JB |
1655 | break; |
1656 | ||
1657 | case GET_LRU_WINDOW: | |
1658 | /* t as arg means consider only full-width windows */ | |
118ea242 | 1659 | if (!NILP (obj) && !WINDOW_FULL_WIDTH_P (w)) |
7ab12479 | 1660 | break; |
7ab12479 | 1661 | /* Ignore dedicated windows and minibuffers. */ |
118ea242 | 1662 | if (MINI_WINDOW_P (w) || !NILP (w->dedicated)) |
7ab12479 | 1663 | break; |
265a9e55 | 1664 | if (NILP (best_window) |
7ab12479 | 1665 | || (XFASTINT (XWINDOW (best_window)->use_time) |
118ea242 GM |
1666 | > XFASTINT (w->use_time))) |
1667 | best_window = window; | |
7ab12479 JB |
1668 | break; |
1669 | ||
1670 | case DELETE_OTHER_WINDOWS: | |
118ea242 GM |
1671 | if (!EQ (window, obj)) |
1672 | Fdelete_window (window); | |
7ab12479 JB |
1673 | break; |
1674 | ||
1675 | case DELETE_BUFFER_WINDOWS: | |
118ea242 | 1676 | if (EQ (w->buffer, obj)) |
7ab12479 | 1677 | { |
118ea242 | 1678 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3548e138 RS |
1679 | |
1680 | /* If this window is dedicated, and in a frame of its own, | |
1681 | kill the frame. */ | |
118ea242 GM |
1682 | if (EQ (window, FRAME_ROOT_WINDOW (f)) |
1683 | && !NILP (w->dedicated) | |
3548e138 | 1684 | && other_visible_frames (f)) |
7ab12479 | 1685 | { |
3548e138 RS |
1686 | /* Skip the other windows on this frame. |
1687 | There might be one, the minibuffer! */ | |
118ea242 GM |
1688 | while (CONSP (XCDR (windows)) |
1689 | && EQ (XWINDOW (XCAR (windows))->frame, | |
1690 | XWINDOW (XCAR (XCDR (windows)))->frame)) | |
1691 | windows = XCDR (windows); | |
1692 | ||
3548e138 | 1693 | /* Now we can safely delete the frame. */ |
118ea242 GM |
1694 | Fdelete_frame (w->frame, Qnil); |
1695 | } | |
1696 | else if (NILP (w->parent)) | |
1697 | { | |
1698 | /* If we're deleting the buffer displayed in the | |
1699 | only window on the frame, find a new buffer to | |
1700 | display there. */ | |
1701 | Lisp_Object buffer; | |
1702 | buffer = Fother_buffer (obj, Qnil, w->frame); | |
1703 | if (NILP (buffer)) | |
1704 | buffer = Fget_buffer_create (build_string ("*scratch*")); | |
1705 | Fset_window_buffer (window, buffer); | |
1706 | if (EQ (window, selected_window)) | |
1707 | Fset_buffer (w->buffer); | |
7ab12479 JB |
1708 | } |
1709 | else | |
118ea242 | 1710 | Fdelete_window (window); |
7ab12479 JB |
1711 | } |
1712 | break; | |
1713 | ||
1714 | case GET_LARGEST_WINDOW: | |
7ab12479 | 1715 | { |
118ea242 | 1716 | /* Ignore dedicated windows and minibuffers. */ |
c930dfab | 1717 | if (MINI_WINDOW_P (w) || !NILP (w->dedicated)) |
118ea242 GM |
1718 | break; |
1719 | ||
c930dfab | 1720 | if (NILP (best_window)) |
118ea242 | 1721 | best_window = window; |
c930dfab GM |
1722 | else |
1723 | { | |
1724 | struct window *b = XWINDOW (best_window); | |
1725 | if (XFASTINT (w->height) * XFASTINT (w->width) | |
1726 | > XFASTINT (b->height) * XFASTINT (b->width)) | |
1727 | best_window = window; | |
1728 | } | |
7ab12479 JB |
1729 | } |
1730 | break; | |
1731 | ||
1732 | case UNSHOW_BUFFER: | |
118ea242 | 1733 | if (EQ (w->buffer, obj)) |
7ab12479 | 1734 | { |
118ea242 GM |
1735 | Lisp_Object buffer; |
1736 | struct frame *f = XFRAME (w->frame); | |
1737 | ||
7ab12479 | 1738 | /* Find another buffer to show in this window. */ |
118ea242 GM |
1739 | buffer = Fother_buffer (obj, Qnil, w->frame); |
1740 | if (NILP (buffer)) | |
1741 | buffer = Fget_buffer_create (build_string ("*scratch*")); | |
1742 | ||
38ab08d1 RS |
1743 | /* If this window is dedicated, and in a frame of its own, |
1744 | kill the frame. */ | |
118ea242 GM |
1745 | if (EQ (window, FRAME_ROOT_WINDOW (f)) |
1746 | && !NILP (w->dedicated) | |
38ab08d1 | 1747 | && other_visible_frames (f)) |
45945a7b RS |
1748 | { |
1749 | /* Skip the other windows on this frame. | |
1750 | There might be one, the minibuffer! */ | |
118ea242 GM |
1751 | while (CONSP (XCDR (windows)) |
1752 | && EQ (XWINDOW (XCAR (windows))->frame, | |
1753 | XWINDOW (XCAR (XCDR (windows)))->frame)) | |
1754 | windows = XCDR (windows); | |
1755 | ||
45945a7b | 1756 | /* Now we can safely delete the frame. */ |
118ea242 | 1757 | Fdelete_frame (w->frame, Qnil); |
45945a7b | 1758 | } |
38ab08d1 | 1759 | else |
38ab08d1 RS |
1760 | { |
1761 | /* Otherwise show a different buffer in the window. */ | |
118ea242 GM |
1762 | w->dedicated = Qnil; |
1763 | Fset_window_buffer (window, buffer); | |
1764 | if (EQ (window, selected_window)) | |
1765 | Fset_buffer (w->buffer); | |
38ab08d1 | 1766 | } |
7ab12479 JB |
1767 | } |
1768 | break; | |
3f8ab7bd RS |
1769 | |
1770 | /* Check for a window that has a killed buffer. */ | |
1771 | case CHECK_ALL_WINDOWS: | |
118ea242 GM |
1772 | if (! NILP (w->buffer) |
1773 | && NILP (XBUFFER (w->buffer)->name)) | |
3f8ab7bd | 1774 | abort (); |
118ea242 | 1775 | break; |
6bbd7a29 GM |
1776 | |
1777 | case WINDOW_LOOP_UNUSED: | |
1778 | break; | |
7ab12479 | 1779 | } |
7ab12479 | 1780 | } |
7ab12479 | 1781 | |
118ea242 | 1782 | UNGCPRO; |
7ab12479 | 1783 | return best_window; |
37962e60 | 1784 | } |
605be8af | 1785 | |
3f8ab7bd RS |
1786 | /* Used for debugging. Abort if any window has a dead buffer. */ |
1787 | ||
233a4a2c | 1788 | void |
3f8ab7bd RS |
1789 | check_all_windows () |
1790 | { | |
1791 | window_loop (CHECK_ALL_WINDOWS, Qnil, 1, Qt); | |
1792 | } | |
1793 | ||
7ab12479 JB |
1794 | DEFUN ("get-lru-window", Fget_lru_window, Sget_lru_window, 0, 1, 0, |
1795 | "Return the window least recently selected or used for display.\n\ | |
89bca612 | 1796 | If optional argument FRAME is `visible', search all visible frames.\n\ |
cee67da9 | 1797 | If FRAME is 0, search all visible and iconified frames.\n\ |
89bca612 RS |
1798 | If FRAME is t, search all frames.\n\ |
1799 | If FRAME is nil, search only the selected frame.\n\ | |
1800 | If FRAME is a frame, search only that frame.") | |
1801 | (frame) | |
1802 | Lisp_Object frame; | |
7ab12479 JB |
1803 | { |
1804 | register Lisp_Object w; | |
1805 | /* First try for a window that is full-width */ | |
89bca612 | 1806 | w = window_loop (GET_LRU_WINDOW, Qt, 0, frame); |
265a9e55 | 1807 | if (!NILP (w) && !EQ (w, selected_window)) |
7ab12479 JB |
1808 | return w; |
1809 | /* If none of them, try the rest */ | |
89bca612 | 1810 | return window_loop (GET_LRU_WINDOW, Qnil, 0, frame); |
7ab12479 JB |
1811 | } |
1812 | ||
1813 | DEFUN ("get-largest-window", Fget_largest_window, Sget_largest_window, 0, 1, 0, | |
1814 | "Return the largest window in area.\n\ | |
89bca612 | 1815 | If optional argument FRAME is `visible', search all visible frames.\n\ |
cee67da9 | 1816 | If FRAME is 0, search all visible and iconified frames.\n\ |
89bca612 RS |
1817 | If FRAME is t, search all frames.\n\ |
1818 | If FRAME is nil, search only the selected frame.\n\ | |
1819 | If FRAME is a frame, search only that frame.") | |
44fa5b1e JB |
1820 | (frame) |
1821 | Lisp_Object frame; | |
7ab12479 JB |
1822 | { |
1823 | return window_loop (GET_LARGEST_WINDOW, Qnil, 0, | |
44fa5b1e | 1824 | frame); |
7ab12479 JB |
1825 | } |
1826 | ||
1827 | DEFUN ("get-buffer-window", Fget_buffer_window, Sget_buffer_window, 1, 2, 0, | |
1828 | "Return a window currently displaying BUFFER, or nil if none.\n\ | |
89bca612 | 1829 | If optional argument FRAME is `visible', search all visible frames.\n\ |
f812f9c6 | 1830 | If optional argument FRAME is 0, search all visible and iconified frames.\n\ |
89bca612 | 1831 | If FRAME is t, search all frames.\n\ |
1bc981d2 | 1832 | If FRAME is nil, search only the selected frame.\n\ |
89bca612 | 1833 | If FRAME is a frame, search only that frame.") |
44fa5b1e JB |
1834 | (buffer, frame) |
1835 | Lisp_Object buffer, frame; | |
7ab12479 JB |
1836 | { |
1837 | buffer = Fget_buffer (buffer); | |
017b2bad | 1838 | if (BUFFERP (buffer)) |
44fa5b1e | 1839 | return window_loop (GET_BUFFER_WINDOW, buffer, 1, frame); |
7ab12479 JB |
1840 | else |
1841 | return Qnil; | |
1842 | } | |
1843 | ||
1844 | DEFUN ("delete-other-windows", Fdelete_other_windows, Sdelete_other_windows, | |
1845 | 0, 1, "", | |
44fa5b1e | 1846 | "Make WINDOW (or the selected window) fill its frame.\n\ |
f16a1ed3 RS |
1847 | Only the frame WINDOW is on is affected.\n\ |
1848 | This function tries to reduce display jumps\n\ | |
1849 | by keeping the text previously visible in WINDOW\n\ | |
1850 | in the same place on the frame. Doing this depends on\n\ | |
1851 | the value of (window-start WINDOW), so if calling this function\n\ | |
1852 | in a program gives strange scrolling, make sure the window-start\n\ | |
1853 | value is reasonable when this function is called.") | |
7ab12479 JB |
1854 | (window) |
1855 | Lisp_Object window; | |
1856 | { | |
1857 | struct window *w; | |
00d3d838 | 1858 | int startpos; |
7ab12479 JB |
1859 | int top; |
1860 | ||
265a9e55 | 1861 | if (NILP (window)) |
7ab12479 JB |
1862 | window = selected_window; |
1863 | else | |
605be8af | 1864 | CHECK_LIVE_WINDOW (window, 0); |
7ab12479 JB |
1865 | |
1866 | w = XWINDOW (window); | |
a2b38b3c | 1867 | |
00d3d838 | 1868 | startpos = marker_position (w->start); |
5500c422 | 1869 | top = XFASTINT (w->top) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w))); |
7ab12479 | 1870 | |
a2b38b3c RS |
1871 | if (MINI_WINDOW_P (w) && top > 0) |
1872 | error ("Can't expand minibuffer to full frame"); | |
1873 | ||
70728a80 | 1874 | window_loop (DELETE_OTHER_WINDOWS, window, 0, WINDOW_FRAME (w)); |
7ab12479 | 1875 | |
00d3d838 KH |
1876 | /* Try to minimize scrolling, by setting the window start to the point |
1877 | will cause the text at the old window start to be at the same place | |
1878 | on the frame. But don't try to do this if the window start is | |
1879 | outside the visible portion (as might happen when the display is | |
1880 | not current, due to typeahead). */ | |
1881 | if (startpos >= BUF_BEGV (XBUFFER (w->buffer)) | |
1882 | && startpos <= BUF_ZV (XBUFFER (w->buffer))) | |
1883 | { | |
1884 | struct position pos; | |
1885 | struct buffer *obuf = current_buffer; | |
1886 | ||
1887 | Fset_buffer (w->buffer); | |
1888 | /* This computation used to temporarily move point, but that can | |
1889 | have unwanted side effects due to text properties. */ | |
0383eb57 | 1890 | pos = *vmotion (startpos, -top, w); |
4d047f50 | 1891 | |
b73ea88e RS |
1892 | set_marker_both (w->start, w->buffer, pos.bufpos, pos.bytepos); |
1893 | w->start_at_line_beg = ((pos.bytepos == BEGV_BYTE | |
1894 | || FETCH_BYTE (pos.bytepos - 1) == '\n') ? Qt | |
00d3d838 | 1895 | : Qnil); |
80622eec RS |
1896 | /* We need to do this, so that the window-scroll-functions |
1897 | get called. */ | |
4d047f50 | 1898 | w->optional_new_start = Qt; |
00d3d838 KH |
1899 | |
1900 | set_buffer_internal (obuf); | |
1901 | } | |
5500c422 | 1902 | |
7ab12479 JB |
1903 | return Qnil; |
1904 | } | |
1905 | ||
1906 | DEFUN ("delete-windows-on", Fdelete_windows_on, Sdelete_windows_on, | |
3cbbb729 | 1907 | 1, 2, "bDelete windows on (buffer): ", |
26f6279d JB |
1908 | "Delete all windows showing BUFFER.\n\ |
1909 | Optional second argument FRAME controls which frames are affected.\n\ | |
c520265e RS |
1910 | If optional argument FRAME is `visible', search all visible frames.\n\ |
1911 | If FRAME is 0, search all visible and iconified frames.\n\ | |
1912 | If FRAME is nil, search all frames.\n\ | |
1913 | If FRAME is t, search only the selected frame.\n\ | |
1914 | If FRAME is a frame, search only that frame.") | |
26f6279d JB |
1915 | (buffer, frame) |
1916 | Lisp_Object buffer, frame; | |
7ab12479 | 1917 | { |
26f6279d JB |
1918 | /* FRAME uses t and nil to mean the opposite of what window_loop |
1919 | expects. */ | |
c520265e RS |
1920 | if (NILP (frame)) |
1921 | frame = Qt; | |
1922 | else if (EQ (frame, Qt)) | |
1923 | frame = Qnil; | |
26f6279d | 1924 | |
265a9e55 | 1925 | if (!NILP (buffer)) |
7ab12479 JB |
1926 | { |
1927 | buffer = Fget_buffer (buffer); | |
1928 | CHECK_BUFFER (buffer, 0); | |
26f6279d | 1929 | window_loop (DELETE_BUFFER_WINDOWS, buffer, 0, frame); |
7ab12479 | 1930 | } |
5500c422 | 1931 | |
7ab12479 JB |
1932 | return Qnil; |
1933 | } | |
1934 | ||
1935 | DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows, | |
1936 | Sreplace_buffer_in_windows, | |
1937 | 1, 1, "bReplace buffer in windows: ", | |
1938 | "Replace BUFFER with some other buffer in all windows showing it.") | |
1939 | (buffer) | |
1940 | Lisp_Object buffer; | |
1941 | { | |
265a9e55 | 1942 | if (!NILP (buffer)) |
7ab12479 JB |
1943 | { |
1944 | buffer = Fget_buffer (buffer); | |
1945 | CHECK_BUFFER (buffer, 0); | |
1946 | window_loop (UNSHOW_BUFFER, buffer, 0, Qt); | |
1947 | } | |
1948 | return Qnil; | |
1949 | } | |
ff58478b RS |
1950 | |
1951 | /* Replace BUFFER with some other buffer in all windows | |
1952 | of all frames, even those on other keyboards. */ | |
1953 | ||
1954 | void | |
1955 | replace_buffer_in_all_windows (buffer) | |
1956 | Lisp_Object buffer; | |
1957 | { | |
27abb84f | 1958 | #ifdef MULTI_KBOARD |
ff58478b RS |
1959 | Lisp_Object tail, frame; |
1960 | ||
ff58478b RS |
1961 | /* A single call to window_loop won't do the job |
1962 | because it only considers frames on the current keyboard. | |
1963 | So loop manually over frames, and handle each one. */ | |
1964 | FOR_EACH_FRAME (tail, frame) | |
db7f721d | 1965 | window_loop (UNSHOW_BUFFER, buffer, 1, frame); |
ff58478b | 1966 | #else |
db7f721d | 1967 | window_loop (UNSHOW_BUFFER, buffer, 1, Qt); |
ff58478b RS |
1968 | #endif |
1969 | } | |
7ab12479 JB |
1970 | \f |
1971 | /* Set the height of WINDOW and all its inferiors. */ | |
a481b3ea JB |
1972 | |
1973 | /* The smallest acceptable dimensions for a window. Anything smaller | |
1974 | might crash Emacs. */ | |
5500c422 | 1975 | |
a481b3ea JB |
1976 | #define MIN_SAFE_WINDOW_WIDTH (2) |
1977 | #define MIN_SAFE_WINDOW_HEIGHT (2) | |
1978 | ||
1979 | /* Make sure that window_min_height and window_min_width are | |
1980 | not too small; if they are, set them to safe minima. */ | |
1981 | ||
1982 | static void | |
1983 | check_min_window_sizes () | |
1984 | { | |
1985 | /* Smaller values might permit a crash. */ | |
1986 | if (window_min_width < MIN_SAFE_WINDOW_WIDTH) | |
1987 | window_min_width = MIN_SAFE_WINDOW_WIDTH; | |
1988 | if (window_min_height < MIN_SAFE_WINDOW_HEIGHT) | |
1989 | window_min_height = MIN_SAFE_WINDOW_HEIGHT; | |
1990 | } | |
1991 | ||
1992 | /* If *ROWS or *COLS are too small a size for FRAME, set them to the | |
1993 | minimum allowable size. */ | |
5500c422 | 1994 | |
605be8af | 1995 | void |
a481b3ea | 1996 | check_frame_size (frame, rows, cols) |
605be8af JB |
1997 | FRAME_PTR frame; |
1998 | int *rows, *cols; | |
a481b3ea | 1999 | { |
628df3bf | 2000 | /* For height, we have to see: |
37962e60 | 2001 | whether the frame has a minibuffer, |
628df3bf JB |
2002 | whether it wants a mode line, and |
2003 | whether it has a menu bar. */ | |
a481b3ea | 2004 | int min_height = |
79f92720 JB |
2005 | (FRAME_MINIBUF_ONLY_P (frame) ? MIN_SAFE_WINDOW_HEIGHT - 1 |
2006 | : (! FRAME_HAS_MINIBUF_P (frame)) ? MIN_SAFE_WINDOW_HEIGHT | |
a481b3ea | 2007 | : 2 * MIN_SAFE_WINDOW_HEIGHT - 1); |
5500c422 GM |
2008 | |
2009 | if (FRAME_TOP_MARGIN (frame) > 0) | |
2010 | min_height += FRAME_TOP_MARGIN (frame); | |
a481b3ea JB |
2011 | |
2012 | if (*rows < min_height) | |
2013 | *rows = min_height; | |
2014 | if (*cols < MIN_SAFE_WINDOW_WIDTH) | |
2015 | *cols = MIN_SAFE_WINDOW_WIDTH; | |
2016 | } | |
2017 | ||
c1636aa6 | 2018 | |
233a4a2c GM |
2019 | /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means |
2020 | check if W's width can be changed, otherwise check W's height. | |
2021 | CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's | |
2022 | siblings, too. If none of the siblings is resizable, WINDOW isn't | |
2023 | either. */ | |
c1636aa6 | 2024 | |
233a4a2c GM |
2025 | static int |
2026 | window_fixed_size_p (w, width_p, check_siblings_p) | |
2027 | struct window *w; | |
2028 | int width_p, check_siblings_p; | |
2029 | { | |
2030 | int fixed_p; | |
2031 | struct window *c; | |
2032 | ||
2033 | if (!NILP (w->hchild)) | |
2034 | { | |
2035 | c = XWINDOW (w->hchild); | |
2036 | ||
2037 | if (width_p) | |
2038 | { | |
2039 | /* A horiz. combination is fixed-width if all of if its | |
2040 | children are. */ | |
2041 | while (c && window_fixed_size_p (c, width_p, 0)) | |
2042 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2043 | fixed_p = c == NULL; | |
2044 | } | |
2045 | else | |
2046 | { | |
2047 | /* A horiz. combination is fixed-height if one of if its | |
2048 | children is. */ | |
2049 | while (c && !window_fixed_size_p (c, width_p, 0)) | |
2050 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2051 | fixed_p = c != NULL; | |
2052 | } | |
2053 | } | |
2054 | else if (!NILP (w->vchild)) | |
2055 | { | |
2056 | c = XWINDOW (w->vchild); | |
2057 | ||
2058 | if (width_p) | |
2059 | { | |
2060 | /* A vert. combination is fixed-width if one of if its | |
2061 | children is. */ | |
2062 | while (c && !window_fixed_size_p (c, width_p, 0)) | |
2063 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2064 | fixed_p = c != NULL; | |
2065 | } | |
2066 | else | |
2067 | { | |
2068 | /* A vert. combination is fixed-height if all of if its | |
2069 | children are. */ | |
2070 | while (c && window_fixed_size_p (c, width_p, 0)) | |
2071 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2072 | fixed_p = c == NULL; | |
2073 | } | |
2074 | } | |
2075 | else if (BUFFERP (w->buffer)) | |
2076 | { | |
a34dfd12 GM |
2077 | if (w->height_fixed_p && !width_p) |
2078 | fixed_p = 1; | |
2079 | else | |
233a4a2c | 2080 | { |
a34dfd12 GM |
2081 | struct buffer *old = current_buffer; |
2082 | Lisp_Object val; | |
2083 | ||
2084 | current_buffer = XBUFFER (w->buffer); | |
2085 | val = find_symbol_value (Qwindow_size_fixed); | |
2086 | current_buffer = old; | |
2087 | ||
2088 | fixed_p = 0; | |
2089 | if (!EQ (val, Qunbound)) | |
2090 | { | |
2091 | fixed_p = !NILP (val); | |
2092 | ||
2093 | if (fixed_p | |
2094 | && ((EQ (val, Qheight) && width_p) | |
2095 | || (EQ (val, Qwidth) && !width_p))) | |
2096 | fixed_p = 0; | |
2097 | } | |
233a4a2c GM |
2098 | } |
2099 | ||
2100 | /* Can't tell if this one is resizable without looking at | |
2101 | siblings. If all siblings are fixed-size this one is too. */ | |
2102 | if (!fixed_p && check_siblings_p && WINDOWP (w->parent)) | |
2103 | { | |
2104 | Lisp_Object child; | |
2105 | ||
2106 | for (child = w->prev; !NILP (child); child = XWINDOW (child)->prev) | |
2107 | if (!window_fixed_size_p (XWINDOW (child), width_p, 0)) | |
2108 | break; | |
2109 | ||
2110 | if (NILP (child)) | |
2111 | for (child = w->next; !NILP (child); child = XWINDOW (child)->next) | |
2112 | if (!window_fixed_size_p (XWINDOW (child), width_p, 0)) | |
2113 | break; | |
2114 | ||
2115 | if (NILP (child)) | |
2116 | fixed_p = 1; | |
2117 | } | |
2118 | } | |
2119 | else | |
2120 | fixed_p = 1; | |
2121 | ||
2122 | return fixed_p; | |
2123 | } | |
2124 | ||
2125 | ||
2126 | /* Return the minimum size of window W, not taking fixed-width windows | |
2127 | into account. WIDTH_P non-zero means return the minimum width, | |
2128 | otherwise return the minimum height. If W is a combination window, | |
2129 | compute the minimum size from the minimum sizes of W's children. */ | |
2130 | ||
2131 | static int | |
2132 | window_min_size_1 (w, width_p) | |
c1636aa6 GM |
2133 | struct window *w; |
2134 | int width_p; | |
2135 | { | |
233a4a2c | 2136 | struct window *c; |
c1636aa6 GM |
2137 | int size; |
2138 | ||
233a4a2c GM |
2139 | if (!NILP (w->hchild)) |
2140 | { | |
2141 | c = XWINDOW (w->hchild); | |
2142 | size = 0; | |
2143 | ||
2144 | if (width_p) | |
2145 | { | |
2146 | /* The min width of a horizontal combination is | |
2147 | the sum of the min widths of its children. */ | |
2148 | while (c) | |
2149 | { | |
2150 | size += window_min_size_1 (c, width_p); | |
2151 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2152 | } | |
2153 | } | |
2154 | else | |
2155 | { | |
2156 | /* The min height a horizontal combination equals | |
2157 | the maximum of all min height of its children. */ | |
2158 | while (c) | |
2159 | { | |
2160 | int min_size = window_min_size_1 (c, width_p); | |
2161 | size = max (min_size, size); | |
2162 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2163 | } | |
2164 | } | |
2165 | } | |
2166 | else if (!NILP (w->vchild)) | |
2167 | { | |
2168 | c = XWINDOW (w->vchild); | |
2169 | size = 0; | |
2170 | ||
2171 | if (width_p) | |
2172 | { | |
2173 | /* The min width of a vertical combination is | |
2174 | the maximum of the min widths of its children. */ | |
2175 | while (c) | |
2176 | { | |
2177 | int min_size = window_min_size_1 (c, width_p); | |
2178 | size = max (min_size, size); | |
2179 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2180 | } | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | /* The min height of a vertical combination equals | |
2185 | the sum of the min height of its children. */ | |
2186 | while (c) | |
2187 | { | |
2188 | size += window_min_size_1 (c, width_p); | |
2189 | c = WINDOWP (c->next) ? XWINDOW (c->next) : NULL; | |
2190 | } | |
2191 | } | |
2192 | } | |
c1636aa6 GM |
2193 | else |
2194 | { | |
233a4a2c GM |
2195 | if (width_p) |
2196 | size = window_min_width; | |
c1636aa6 | 2197 | else |
233a4a2c GM |
2198 | { |
2199 | if (MINI_WINDOW_P (w) | |
2200 | || (!WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 2201 | && !WINDOW_WANTS_HEADER_LINE_P (w))) |
233a4a2c GM |
2202 | size = 1; |
2203 | else | |
2204 | size = window_min_height; | |
2205 | } | |
c1636aa6 GM |
2206 | } |
2207 | ||
2208 | return size; | |
2209 | } | |
2210 | ||
2211 | ||
233a4a2c GM |
2212 | /* Return the minimum size of window W, taking fixed-size windows into |
2213 | account. WIDTH_P non-zero means return the minimum width, | |
f984d4fc GM |
2214 | otherwise return the minimum height. IGNORE_FIXED_P non-zero means |
2215 | ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size | |
2216 | unless FIXED is null. */ | |
7ab12479 | 2217 | |
233a4a2c | 2218 | static int |
f984d4fc | 2219 | window_min_size (w, width_p, ignore_fixed_p, fixed) |
233a4a2c | 2220 | struct window *w; |
f984d4fc | 2221 | int width_p, ignore_fixed_p, *fixed; |
233a4a2c GM |
2222 | { |
2223 | int size, fixed_p; | |
2224 | ||
f984d4fc GM |
2225 | if (ignore_fixed_p) |
2226 | fixed_p = 0; | |
2227 | else | |
2228 | fixed_p = window_fixed_size_p (w, width_p, 1); | |
2229 | ||
233a4a2c GM |
2230 | if (fixed) |
2231 | *fixed = fixed_p; | |
2232 | ||
2233 | if (fixed_p) | |
2234 | size = width_p ? XFASTINT (w->width) : XFASTINT (w->height); | |
2235 | else | |
2236 | size = window_min_size_1 (w, width_p); | |
f984d4fc | 2237 | |
233a4a2c GM |
2238 | return size; |
2239 | } | |
2240 | ||
2241 | ||
2242 | /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set | |
2243 | WINDOW's width. Resize WINDOW's children, if any, so that they | |
2244 | keep their proportionate size relative to WINDOW. Propagate | |
2245 | WINDOW's top or left edge position to children. Delete windows | |
2246 | that become too small unless NODELETE_P is non-zero. */ | |
2247 | ||
2248 | static void | |
2249 | size_window (window, size, width_p, nodelete_p) | |
7ab12479 | 2250 | Lisp_Object window; |
233a4a2c | 2251 | int size, width_p, nodelete_p; |
7ab12479 | 2252 | { |
233a4a2c GM |
2253 | struct window *w = XWINDOW (window); |
2254 | struct window *c; | |
2255 | Lisp_Object child, *forward, *sideward; | |
2256 | int old_size, min_size; | |
7ab12479 | 2257 | |
a481b3ea | 2258 | check_min_window_sizes (); |
233a4a2c | 2259 | |
b5f05b50 GM |
2260 | /* If the window has been "too small" at one point, |
2261 | don't delete it for being "too small" in the future. | |
2262 | Preserve it as long as that is at all possible. */ | |
233a4a2c GM |
2263 | if (width_p) |
2264 | { | |
2265 | old_size = XFASTINT (w->width); | |
2266 | min_size = window_min_width; | |
2267 | } | |
2268 | else | |
2269 | { | |
2270 | old_size = XFASTINT (w->height); | |
2271 | min_size = window_min_height; | |
2272 | } | |
2273 | ||
2274 | if (old_size < window_min_width) | |
b5f05b50 GM |
2275 | w->too_small_ok = Qt; |
2276 | ||
233a4a2c GM |
2277 | /* Maybe delete WINDOW if it's too small. */ |
2278 | if (!nodelete_p && !NILP (w->parent)) | |
7ab12479 | 2279 | { |
233a4a2c | 2280 | int min_size; |
b5f05b50 GM |
2281 | |
2282 | if (!MINI_WINDOW_P (w) && !NILP (w->too_small_ok)) | |
233a4a2c | 2283 | min_size = width_p ? MIN_SAFE_WINDOW_WIDTH : MIN_SAFE_WINDOW_HEIGHT; |
b5f05b50 | 2284 | else |
233a4a2c | 2285 | min_size = width_p ? window_min_width : window_min_height; |
b5f05b50 | 2286 | |
233a4a2c | 2287 | if (size < min_size) |
c1636aa6 GM |
2288 | { |
2289 | delete_window (window); | |
2290 | return; | |
2291 | } | |
7ab12479 JB |
2292 | } |
2293 | ||
233a4a2c | 2294 | /* Set redisplay hints. */ |
d834a2e9 | 2295 | XSETFASTINT (w->last_modified, 0); |
3cd21523 | 2296 | XSETFASTINT (w->last_overlay_modified, 0); |
7ab12479 | 2297 | windows_or_buffers_changed++; |
29aeee73 RS |
2298 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1; |
2299 | ||
233a4a2c GM |
2300 | if (width_p) |
2301 | { | |
2302 | sideward = &w->vchild; | |
2303 | forward = &w->hchild; | |
2304 | XSETFASTINT (w->width, size); | |
2305 | } | |
2306 | else | |
2307 | { | |
2308 | sideward = &w->hchild; | |
2309 | forward = &w->vchild; | |
2310 | XSETFASTINT (w->height, size); | |
2311 | } | |
2312 | ||
2313 | if (!NILP (*sideward)) | |
7ab12479 | 2314 | { |
233a4a2c | 2315 | for (child = *sideward; !NILP (child); child = c->next) |
7ab12479 | 2316 | { |
233a4a2c GM |
2317 | c = XWINDOW (child); |
2318 | if (width_p) | |
2319 | c->left = w->left; | |
2320 | else | |
2321 | c->top = w->top; | |
2322 | size_window (child, size, width_p, nodelete_p); | |
7ab12479 JB |
2323 | } |
2324 | } | |
233a4a2c | 2325 | else if (!NILP (*forward)) |
7ab12479 | 2326 | { |
233a4a2c GM |
2327 | int fixed_size, each, extra, n; |
2328 | int resize_fixed_p, nfixed; | |
2329 | int last_pos, first_pos, nchildren; | |
2330 | ||
2331 | /* Determine the fixed-size portion of the this window, and the | |
2332 | number of child windows. */ | |
2333 | fixed_size = nchildren = nfixed = 0; | |
2334 | for (child = *forward; !NILP (child); child = c->next, ++nchildren) | |
7ab12479 JB |
2335 | { |
2336 | c = XWINDOW (child); | |
233a4a2c GM |
2337 | if (window_fixed_size_p (c, width_p, 0)) |
2338 | { | |
2339 | fixed_size += (width_p | |
2340 | ? XFASTINT (c->width) : XFASTINT (c->height)); | |
2341 | ++nfixed; | |
2342 | } | |
2343 | } | |
7ab12479 | 2344 | |
233a4a2c GM |
2345 | /* If the new size is smaller than fixed_size, or if there |
2346 | aren't any resizable windows, allow resizing fixed-size | |
2347 | windows. */ | |
2348 | resize_fixed_p = nfixed == nchildren || size < fixed_size; | |
2349 | ||
2350 | /* Compute how many lines/columns to add to each child. The | |
2351 | value of extra takes care of rounding errors. */ | |
2352 | n = resize_fixed_p ? nchildren : nchildren - nfixed; | |
2353 | each = (size - old_size) / n; | |
2354 | extra = (size - old_size) - n * each; | |
2355 | ||
2356 | /* Compute new children heights and edge positions. */ | |
2357 | first_pos = width_p ? XFASTINT (w->left) : XFASTINT (w->top); | |
2358 | last_pos = first_pos; | |
2359 | for (child = *forward; !NILP (child); child = c->next) | |
2360 | { | |
2361 | int new_size, old_size; | |
2362 | ||
2363 | c = XWINDOW (child); | |
2364 | old_size = width_p ? XFASTINT (c->width) : XFASTINT (c->height); | |
2365 | new_size = old_size; | |
7ab12479 | 2366 | |
233a4a2c GM |
2367 | /* The top or left edge position of this child equals the |
2368 | bottom or right edge of its predecessor. */ | |
2369 | if (width_p) | |
2370 | c->left = make_number (last_pos); | |
2371 | else | |
2372 | c->top = make_number (last_pos); | |
7ab12479 | 2373 | |
233a4a2c GM |
2374 | /* If this child can be resized, do it. */ |
2375 | if (resize_fixed_p || !window_fixed_size_p (c, width_p, 0)) | |
2376 | { | |
2377 | new_size = old_size + each + extra; | |
2378 | extra = 0; | |
2379 | } | |
2380 | ||
2381 | /* Set new height. Note that size_window also propagates | |
2382 | edge positions to children, so it's not a no-op if we | |
2383 | didn't change the child's size. */ | |
2384 | size_window (child, new_size, width_p, 1); | |
2385 | ||
2386 | /* Remember the bottom/right edge position of this child; it | |
2387 | will be used to set the top/left edge of the next child. */ | |
2388 | last_pos += new_size; | |
7ab12479 | 2389 | } |
233a4a2c GM |
2390 | |
2391 | /* We should have covered the parent exactly with child windows. */ | |
2392 | xassert (size == last_pos - first_pos); | |
2393 | ||
7ab12479 | 2394 | /* Now delete any children that became too small. */ |
233a4a2c GM |
2395 | if (!nodelete_p) |
2396 | for (child = *forward; !NILP (child); child = c->next) | |
7ab12479 | 2397 | { |
233a4a2c GM |
2398 | int child_size; |
2399 | c = XWINDOW (child); | |
2400 | child_size = width_p ? XFASTINT (c->width) : XFASTINT (c->height); | |
2401 | size_window (child, child_size, width_p, 0); | |
7ab12479 JB |
2402 | } |
2403 | } | |
2404 | } | |
2405 | ||
233a4a2c GM |
2406 | /* Set WINDOW's height to HEIGHT, and recursively change the height of |
2407 | WINDOW's children. NODELETE non-zero means don't delete windows | |
2408 | that become too small in the process. (The caller should check | |
2409 | later and do so if appropriate.) */ | |
7ab12479 | 2410 | |
5e14b1fc | 2411 | void |
233a4a2c | 2412 | set_window_height (window, height, nodelete) |
7ab12479 | 2413 | Lisp_Object window; |
233a4a2c | 2414 | int height; |
7ab12479 JB |
2415 | int nodelete; |
2416 | { | |
233a4a2c GM |
2417 | size_window (window, height, 0, nodelete); |
2418 | } | |
7ab12479 | 2419 | |
7ab12479 | 2420 | |
233a4a2c GM |
2421 | /* Set WINDOW's width to WIDTH, and recursively change the width of |
2422 | WINDOW's children. NODELETE non-zero means don't delete windows | |
2423 | that become too small in the process. (The caller should check | |
2424 | later and do so if appropriate.) */ | |
7ab12479 | 2425 | |
233a4a2c GM |
2426 | void |
2427 | set_window_width (window, width, nodelete) | |
2428 | Lisp_Object window; | |
2429 | int width; | |
2430 | int nodelete; | |
2431 | { | |
2432 | size_window (window, width, 1, nodelete); | |
7ab12479 | 2433 | } |
233a4a2c | 2434 | |
7ab12479 | 2435 | \f |
1d8d96fa | 2436 | int window_select_count; |
7ab12479 | 2437 | |
5b03d3c0 RS |
2438 | Lisp_Object |
2439 | Fset_window_buffer_unwind (obuf) | |
2440 | Lisp_Object obuf; | |
2441 | { | |
2442 | Fset_buffer (obuf); | |
2443 | return Qnil; | |
2444 | } | |
2445 | ||
7ab12479 | 2446 | |
5500c422 GM |
2447 | /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero |
2448 | means it's allowed to run hooks. See make_frame for a case where | |
2449 | it's not allowed. */ | |
7ab12479 | 2450 | |
5500c422 GM |
2451 | void |
2452 | set_window_buffer (window, buffer, run_hooks_p) | |
2453 | Lisp_Object window, buffer; | |
2454 | int run_hooks_p; | |
2455 | { | |
2456 | struct window *w = XWINDOW (window); | |
2457 | struct buffer *b = XBUFFER (buffer); | |
2458 | int count = specpdl_ptr - specpdl; | |
7ab12479 JB |
2459 | |
2460 | w->buffer = buffer; | |
86e48436 RS |
2461 | |
2462 | if (EQ (window, selected_window)) | |
5500c422 | 2463 | b->last_selected_window = window; |
beb4e312 RS |
2464 | |
2465 | /* Update time stamps of buffer display. */ | |
5500c422 GM |
2466 | if (INTEGERP (b->display_count)) |
2467 | XSETINT (b->display_count, XINT (b->display_count) + 1); | |
2468 | b->display_time = Fcurrent_time (); | |
86e48436 | 2469 | |
d834a2e9 | 2470 | XSETFASTINT (w->window_end_pos, 0); |
5500c422 GM |
2471 | XSETFASTINT (w->window_end_vpos, 0); |
2472 | bzero (&w->last_cursor, sizeof w->last_cursor); | |
5a41ab94 | 2473 | w->window_end_valid = Qnil; |
dba06815 | 2474 | XSETFASTINT (w->hscroll, 0); |
5500c422 | 2475 | set_marker_both (w->pointm, buffer, BUF_PT (b), BUF_PT_BYTE (b)); |
7ab12479 | 2476 | set_marker_restricted (w->start, |
5500c422 | 2477 | make_number (b->last_window_start), |
7ab12479 JB |
2478 | buffer); |
2479 | w->start_at_line_beg = Qnil; | |
e36ab06b | 2480 | w->force_start = Qnil; |
d834a2e9 | 2481 | XSETFASTINT (w->last_modified, 0); |
3cd21523 | 2482 | XSETFASTINT (w->last_overlay_modified, 0); |
7ab12479 | 2483 | windows_or_buffers_changed++; |
5b03d3c0 RS |
2484 | |
2485 | /* We must select BUFFER for running the window-scroll-functions. | |
2486 | If WINDOW is selected, switch permanently. | |
2487 | Otherwise, switch but go back to the ambient buffer afterward. */ | |
7ab12479 JB |
2488 | if (EQ (window, selected_window)) |
2489 | Fset_buffer (buffer); | |
5b03d3c0 RS |
2490 | /* We can't check ! NILP (Vwindow_scroll_functions) here |
2491 | because that might itself be a local variable. */ | |
2492 | else if (window_initialized) | |
2493 | { | |
2494 | record_unwind_protect (Fset_window_buffer_unwind, Fcurrent_buffer ()); | |
2495 | Fset_buffer (buffer); | |
2496 | } | |
2497 | ||
5500c422 | 2498 | /* Set left and right marginal area width from buffer. */ |
cfa22082 | 2499 | Fset_window_margins (window, b->left_margin_width, b->right_margin_width); |
7ab12479 | 2500 | |
5500c422 GM |
2501 | if (run_hooks_p) |
2502 | { | |
2503 | if (! NILP (Vwindow_scroll_functions)) | |
2504 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
2505 | Fmarker_position (w->start)); | |
2506 | ||
2507 | if (! NILP (Vwindow_configuration_change_hook) | |
2508 | && ! NILP (Vrun_hooks)) | |
2509 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); | |
2510 | } | |
543f5fb1 | 2511 | |
5b03d3c0 | 2512 | unbind_to (count, Qnil); |
5500c422 | 2513 | } |
5b03d3c0 | 2514 | |
5500c422 GM |
2515 | |
2516 | DEFUN ("set-window-buffer", Fset_window_buffer, Sset_window_buffer, 2, 2, 0, | |
2517 | "Make WINDOW display BUFFER as its contents.\n\ | |
2518 | BUFFER can be a buffer or buffer name.") | |
2519 | (window, buffer) | |
2520 | register Lisp_Object window, buffer; | |
2521 | { | |
2522 | register Lisp_Object tem; | |
2523 | register struct window *w = decode_window (window); | |
5500c422 | 2524 | |
bed0c171 | 2525 | XSETWINDOW (window, w); |
5500c422 GM |
2526 | buffer = Fget_buffer (buffer); |
2527 | CHECK_BUFFER (buffer, 1); | |
2528 | ||
2529 | if (NILP (XBUFFER (buffer)->name)) | |
2530 | error ("Attempt to display deleted buffer"); | |
2531 | ||
2532 | tem = w->buffer; | |
2533 | if (NILP (tem)) | |
2534 | error ("Window is deleted"); | |
2535 | else if (! EQ (tem, Qt)) /* w->buffer is t when the window | |
2536 | is first being set up. */ | |
2537 | { | |
2538 | if (!NILP (w->dedicated) && !EQ (tem, buffer)) | |
2539 | error ("Window is dedicated to `%s'", | |
2540 | XSTRING (XBUFFER (tem)->name)->data); | |
2541 | ||
2542 | unshow_buffer (w); | |
2543 | } | |
2544 | ||
2545 | set_window_buffer (window, buffer, 1); | |
7ab12479 JB |
2546 | return Qnil; |
2547 | } | |
2548 | ||
2549 | DEFUN ("select-window", Fselect_window, Sselect_window, 1, 1, 0, | |
2550 | "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\ | |
beb4e312 RS |
2551 | If WINDOW is not already selected, also make WINDOW's buffer current.\n\ |
2552 | Note that the main editor command loop\n\ | |
2553 | selects the buffer of the selected window before each command.") | |
7ab12479 JB |
2554 | (window) |
2555 | register Lisp_Object window; | |
b7354ddf RS |
2556 | { |
2557 | return select_window_1 (window, 1); | |
2558 | } | |
2559 | \f | |
719eaeb1 GM |
2560 | /* Note that selected_window can be nil |
2561 | when this is called from Fset_window_configuration. */ | |
2562 | ||
b7354ddf RS |
2563 | static Lisp_Object |
2564 | select_window_1 (window, recordflag) | |
2565 | register Lisp_Object window; | |
2566 | int recordflag; | |
7ab12479 JB |
2567 | { |
2568 | register struct window *w; | |
719eaeb1 | 2569 | register struct window *ow; |
1ae1a37d | 2570 | struct frame *sf; |
7ab12479 | 2571 | |
605be8af | 2572 | CHECK_LIVE_WINDOW (window, 0); |
7ab12479 JB |
2573 | |
2574 | w = XWINDOW (window); | |
2575 | ||
265a9e55 | 2576 | if (NILP (w->buffer)) |
7ab12479 JB |
2577 | error ("Trying to select deleted window or non-leaf window"); |
2578 | ||
d834a2e9 | 2579 | XSETFASTINT (w->use_time, ++window_select_count); |
7ab12479 JB |
2580 | if (EQ (window, selected_window)) |
2581 | return window; | |
2582 | ||
719eaeb1 GM |
2583 | if (!NILP (selected_window)) |
2584 | { | |
2585 | ow = XWINDOW (selected_window); | |
2586 | if (! NILP (ow->buffer)) | |
2587 | set_marker_both (ow->pointm, ow->buffer, | |
2588 | BUF_PT (XBUFFER (ow->buffer)), | |
2589 | BUF_PT_BYTE (XBUFFER (ow->buffer))); | |
2590 | } | |
7ab12479 JB |
2591 | |
2592 | selected_window = window; | |
1ae1a37d GM |
2593 | sf = SELECTED_FRAME (); |
2594 | if (XFRAME (WINDOW_FRAME (w)) != sf) | |
7ab12479 | 2595 | { |
44fa5b1e | 2596 | XFRAME (WINDOW_FRAME (w))->selected_window = window; |
147a6615 RS |
2597 | /* Use this rather than Fhandle_switch_frame |
2598 | so that FRAME_FOCUS_FRAME is moved appropriately as we | |
2599 | move around in the state where a minibuffer in a separate | |
2600 | frame is active. */ | |
2601 | Fselect_frame (WINDOW_FRAME (w), Qnil); | |
7ab12479 JB |
2602 | } |
2603 | else | |
1ae1a37d | 2604 | sf->selected_window = window; |
7ab12479 | 2605 | |
b7354ddf RS |
2606 | if (recordflag) |
2607 | record_buffer (w->buffer); | |
7ab12479 JB |
2608 | Fset_buffer (w->buffer); |
2609 | ||
86e48436 RS |
2610 | XBUFFER (w->buffer)->last_selected_window = window; |
2611 | ||
7ab12479 JB |
2612 | /* Go to the point recorded in the window. |
2613 | This is important when the buffer is in more | |
2614 | than one window. It also matters when | |
2615 | redisplay_window has altered point after scrolling, | |
2616 | because it makes the change only in the window. */ | |
2617 | { | |
2618 | register int new_point = marker_position (w->pointm); | |
2619 | if (new_point < BEGV) | |
2620 | SET_PT (BEGV); | |
a9c95e08 | 2621 | else if (new_point > ZV) |
7ab12479 JB |
2622 | SET_PT (ZV); |
2623 | else | |
2624 | SET_PT (new_point); | |
2625 | } | |
2626 | ||
2627 | windows_or_buffers_changed++; | |
2628 | return window; | |
2629 | } | |
b7354ddf | 2630 | \f |
441a127e RS |
2631 | /* Deiconify the frame containing the window WINDOW, |
2632 | unless it is the selected frame; | |
2633 | then return WINDOW. | |
2634 | ||
2635 | The reason for the exception for the selected frame | |
2636 | is that it seems better not to change the selected frames visibility | |
2637 | merely because of displaying a different buffer in it. | |
2638 | The deiconification is useful when a buffer gets shown in | |
2639 | another frame that you were not using lately. */ | |
d07f802a RS |
2640 | |
2641 | static Lisp_Object | |
2642 | display_buffer_1 (window) | |
2643 | Lisp_Object window; | |
2644 | { | |
1ae1a37d GM |
2645 | Lisp_Object frame = XWINDOW (window)->frame; |
2646 | FRAME_PTR f = XFRAME (frame); | |
2647 | ||
d07f802a | 2648 | FRAME_SAMPLE_VISIBILITY (f); |
1ae1a37d GM |
2649 | |
2650 | if (!EQ (frame, selected_frame)) | |
60117126 RS |
2651 | { |
2652 | if (FRAME_ICONIFIED_P (f)) | |
1ae1a37d | 2653 | Fmake_frame_visible (frame); |
37962e60 | 2654 | else if (FRAME_VISIBLE_P (f)) |
1ae1a37d | 2655 | Fraise_frame (frame); |
60117126 | 2656 | } |
1ae1a37d | 2657 | |
d07f802a RS |
2658 | return window; |
2659 | } | |
2660 | ||
4628f7a4 | 2661 | DEFUN ("special-display-p", Fspecial_display_p, Sspecial_display_p, 1, 1, 0, |
0f7d64d2 GV |
2662 | "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\ |
2663 | The value is actually t if the frame should be called with default frame\n\ | |
2664 | parameters, and a list of frame parameters if they were specified.\n\ | |
4628f7a4 EN |
2665 | See `special-display-buffer-names', and `special-display-regexps'.") |
2666 | (buffer_name) | |
2667 | Lisp_Object buffer_name; | |
2668 | { | |
2669 | Lisp_Object tem; | |
2670 | ||
2671 | CHECK_STRING (buffer_name, 1); | |
2672 | ||
2673 | tem = Fmember (buffer_name, Vspecial_display_buffer_names); | |
2674 | if (!NILP (tem)) | |
2675 | return Qt; | |
2676 | ||
2677 | tem = Fassoc (buffer_name, Vspecial_display_buffer_names); | |
2678 | if (!NILP (tem)) | |
2679 | return XCDR (tem); | |
2680 | ||
2681 | for (tem = Vspecial_display_regexps; CONSP (tem); tem = XCDR (tem)) | |
2682 | { | |
2683 | Lisp_Object car = XCAR (tem); | |
2684 | if (STRINGP (car) | |
2685 | && fast_string_match (car, buffer_name) >= 0) | |
2686 | return Qt; | |
2687 | else if (CONSP (car) | |
2688 | && STRINGP (XCAR (car)) | |
2689 | && fast_string_match (XCAR (car), buffer_name) >= 0) | |
0057b00a | 2690 | return XCDR (car); |
4628f7a4 EN |
2691 | } |
2692 | return Qnil; | |
2693 | } | |
2694 | ||
2695 | DEFUN ("same-window-p", Fsame_window_p, Ssame_window_p, 1, 1, 0, | |
0f7d64d2 | 2696 | "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\ |
4628f7a4 EN |
2697 | See `same-window-buffer-names' and `same-window-regexps'.") |
2698 | (buffer_name) | |
2699 | Lisp_Object buffer_name; | |
2700 | { | |
2701 | Lisp_Object tem; | |
2702 | ||
2703 | CHECK_STRING (buffer_name, 1); | |
2704 | ||
2705 | tem = Fmember (buffer_name, Vsame_window_buffer_names); | |
2706 | if (!NILP (tem)) | |
2707 | return Qt; | |
2708 | ||
2709 | tem = Fassoc (buffer_name, Vsame_window_buffer_names); | |
2710 | if (!NILP (tem)) | |
2711 | return Qt; | |
2712 | ||
2713 | for (tem = Vsame_window_regexps; CONSP (tem); tem = XCDR (tem)) | |
2714 | { | |
2715 | Lisp_Object car = XCAR (tem); | |
2716 | if (STRINGP (car) | |
2717 | && fast_string_match (car, buffer_name) >= 0) | |
2718 | return Qt; | |
2719 | else if (CONSP (car) | |
2720 | && STRINGP (XCAR (car)) | |
2721 | && fast_string_match (XCAR (car), buffer_name) >= 0) | |
2722 | return Qt; | |
2723 | } | |
2724 | return Qnil; | |
2725 | } | |
2726 | ||
53f76081 RS |
2727 | /* Use B so the default is (other-buffer). */ |
2728 | DEFUN ("display-buffer", Fdisplay_buffer, Sdisplay_buffer, 1, 3, | |
2729 | "BDisplay buffer: \nP", | |
7ab12479 JB |
2730 | "Make BUFFER appear in some window but don't select it.\n\ |
2731 | BUFFER can be a buffer or a buffer name.\n\ | |
2732 | If BUFFER is shown already in some window, just use that one,\n\ | |
2733 | unless the window is the selected window and the optional second\n\ | |
46d3268a | 2734 | argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\ |
5141b901 | 2735 | If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\ |
5abcf432 | 2736 | Returns the window displaying BUFFER.\n\ |
9c3da604 GM |
2737 | If `display-reuse-frames' is non-nil, and another frame is currently\n\ |
2738 | displaying BUFFER, then simply raise that frame.\n\ | |
5abcf432 RS |
2739 | \n\ |
2740 | The variables `special-display-buffer-names', `special-display-regexps',\n\ | |
2741 | `same-window-buffer-names', and `same-window-regexps' customize how certain\n\ | |
53f76081 RS |
2742 | buffer names are handled.\n\ |
2743 | \n\ | |
2744 | If optional argument FRAME is `visible', search all visible frames.\n\ | |
2745 | If FRAME is 0, search all visible and iconified frames.\n\ | |
2746 | If FRAME is t, search all frames.\n\ | |
2747 | If FRAME is a frame, search only that frame.\n\ | |
2748 | If FRAME is nil, search only the selected frame\n\ | |
2749 | (actually the last nonminibuffer frame),\n\ | |
9c3da604 | 2750 | unless `pop-up-frames' or `display-reuse-frames' is non-nil,\n\ |
53f76081 RS |
2751 | which means search visible and iconified frames.") |
2752 | (buffer, not_this_window, frame) | |
2753 | register Lisp_Object buffer, not_this_window, frame; | |
7ab12479 | 2754 | { |
aee631c2 | 2755 | register Lisp_Object window, tem, swp; |
1ae1a37d | 2756 | struct frame *f; |
7ab12479 | 2757 | |
aee631c2 | 2758 | swp = Qnil; |
7ab12479 JB |
2759 | buffer = Fget_buffer (buffer); |
2760 | CHECK_BUFFER (buffer, 0); | |
2761 | ||
265a9e55 | 2762 | if (!NILP (Vdisplay_buffer_function)) |
7ab12479 JB |
2763 | return call2 (Vdisplay_buffer_function, buffer, not_this_window); |
2764 | ||
265a9e55 | 2765 | if (NILP (not_this_window) |
7ab12479 | 2766 | && XBUFFER (XWINDOW (selected_window)->buffer) == XBUFFER (buffer)) |
d07f802a | 2767 | return display_buffer_1 (selected_window); |
7ab12479 | 2768 | |
855d8627 RS |
2769 | /* See if the user has specified this buffer should appear |
2770 | in the selected window. */ | |
2771 | if (NILP (not_this_window)) | |
2772 | { | |
aee631c2 RS |
2773 | swp = Fsame_window_p (XBUFFER (buffer)->name); |
2774 | if (!NILP (swp) && !no_switch_window (selected_window)) | |
c63dc4a2 RS |
2775 | { |
2776 | Fswitch_to_buffer (buffer, Qnil); | |
d07f802a | 2777 | return display_buffer_1 (selected_window); |
c63dc4a2 | 2778 | } |
855d8627 RS |
2779 | } |
2780 | ||
9c3da604 | 2781 | /* If the user wants pop-up-frames or display-reuse-frames, then |
73dc5198 KH |
2782 | look for a window showing BUFFER on any visible or iconified frame. |
2783 | Otherwise search only the current frame. */ | |
53f76081 RS |
2784 | if (! NILP (frame)) |
2785 | tem = frame; | |
9c3da604 GM |
2786 | else if (pop_up_frames |
2787 | || display_buffer_reuse_frames | |
2788 | || last_nonminibuf_frame == 0) | |
73dc5198 KH |
2789 | XSETFASTINT (tem, 0); |
2790 | else | |
73dc5198 | 2791 | XSETFRAME (tem, last_nonminibuf_frame); |
9c3da604 | 2792 | |
73dc5198 | 2793 | window = Fget_buffer_window (buffer, tem); |
265a9e55 JB |
2794 | if (!NILP (window) |
2795 | && (NILP (not_this_window) || !EQ (window, selected_window))) | |
9c3da604 | 2796 | return display_buffer_1 (window); |
7ab12479 | 2797 | |
a90712c2 | 2798 | /* Certain buffer names get special handling. */ |
aee631c2 | 2799 | if (!NILP (Vspecial_display_function) && NILP (swp)) |
a90712c2 | 2800 | { |
4628f7a4 EN |
2801 | tem = Fspecial_display_p (XBUFFER (buffer)->name); |
2802 | if (EQ (tem, Qt)) | |
a90712c2 | 2803 | return call1 (Vspecial_display_function, buffer); |
4628f7a4 EN |
2804 | if (CONSP (tem)) |
2805 | return call2 (Vspecial_display_function, buffer, tem); | |
a90712c2 RS |
2806 | } |
2807 | ||
44fa5b1e JB |
2808 | /* If there are no frames open that have more than a minibuffer, |
2809 | we need to create a new frame. */ | |
2810 | if (pop_up_frames || last_nonminibuf_frame == 0) | |
7ab12479 | 2811 | { |
a90712c2 | 2812 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
7ab12479 | 2813 | Fset_window_buffer (window, buffer); |
d07f802a | 2814 | return display_buffer_1 (window); |
7ab12479 | 2815 | } |
7ab12479 | 2816 | |
1ae1a37d | 2817 | f = SELECTED_FRAME (); |
43bad991 | 2818 | if (pop_up_windows |
1ae1a37d | 2819 | || FRAME_MINIBUF_ONLY_P (f) |
cee67da9 RS |
2820 | /* If the current frame is a special display frame, |
2821 | don't try to reuse its windows. */ | |
1ae1a37d | 2822 | || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f))->dedicated)) |
7ab12479 | 2823 | { |
12cae7c0 KH |
2824 | Lisp_Object frames; |
2825 | ||
37962e60 | 2826 | frames = Qnil; |
1ae1a37d | 2827 | if (FRAME_MINIBUF_ONLY_P (f)) |
74112613 | 2828 | XSETFRAME (frames, last_nonminibuf_frame); |
7ab12479 JB |
2829 | /* Don't try to create a window if would get an error */ |
2830 | if (split_height_threshold < window_min_height << 1) | |
2831 | split_height_threshold = window_min_height << 1; | |
2832 | ||
cee67da9 RS |
2833 | /* Note that both Fget_largest_window and Fget_lru_window |
2834 | ignore minibuffers and dedicated windows. | |
2835 | This means they can return nil. */ | |
7ab12479 | 2836 | |
cee67da9 RS |
2837 | /* If the frame we would try to split cannot be split, |
2838 | try other frames. */ | |
1ae1a37d | 2839 | if (FRAME_NO_SPLIT_P (NILP (frames) ? f : last_nonminibuf_frame)) |
cee67da9 RS |
2840 | { |
2841 | /* Try visible frames first. */ | |
2842 | window = Fget_largest_window (Qvisible); | |
2843 | /* If that didn't work, try iconified frames. */ | |
2844 | if (NILP (window)) | |
2845 | window = Fget_largest_window (make_number (0)); | |
2846 | if (NILP (window)) | |
2847 | window = Fget_largest_window (Qt); | |
2848 | } | |
2849 | else | |
2850 | window = Fget_largest_window (frames); | |
2851 | ||
92cca945 RS |
2852 | /* If we got a tall enough full-width window that can be split, |
2853 | split it. */ | |
265a9e55 | 2854 | if (!NILP (window) |
92cca945 | 2855 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
7ab12479 | 2856 | && window_height (window) >= split_height_threshold |
111e5992 | 2857 | && WINDOW_FULL_WIDTH_P (XWINDOW (window))) |
7ab12479 JB |
2858 | window = Fsplit_window (window, Qnil, Qnil); |
2859 | else | |
2860 | { | |
1942f68f RS |
2861 | Lisp_Object upper, lower, other; |
2862 | ||
44fa5b1e | 2863 | window = Fget_lru_window (frames); |
92cca945 RS |
2864 | /* If the LRU window is selected, and big enough, |
2865 | and can be split, split it. */ | |
cee67da9 | 2866 | if (!NILP (window) |
92cca945 | 2867 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
cee67da9 RS |
2868 | && (EQ (window, selected_window) |
2869 | || EQ (XWINDOW (window)->parent, Qnil)) | |
7ab12479 JB |
2870 | && window_height (window) >= window_min_height << 1) |
2871 | window = Fsplit_window (window, Qnil, Qnil); | |
cee67da9 | 2872 | /* If Fget_lru_window returned nil, try other approaches. */ |
48d9379d | 2873 | |
cee67da9 | 2874 | /* Try visible frames first. */ |
48d9379d RS |
2875 | if (NILP (window)) |
2876 | window = Fget_buffer_window (buffer, Qvisible); | |
cee67da9 RS |
2877 | if (NILP (window)) |
2878 | window = Fget_largest_window (Qvisible); | |
2879 | /* If that didn't work, try iconified frames. */ | |
48d9379d RS |
2880 | if (NILP (window)) |
2881 | window = Fget_buffer_window (buffer, make_number (0)); | |
cee67da9 RS |
2882 | if (NILP (window)) |
2883 | window = Fget_largest_window (make_number (0)); | |
2884 | /* Try invisible frames. */ | |
48d9379d RS |
2885 | if (NILP (window)) |
2886 | window = Fget_buffer_window (buffer, Qt); | |
cee67da9 RS |
2887 | if (NILP (window)) |
2888 | window = Fget_largest_window (Qt); | |
2889 | /* As a last resort, make a new frame. */ | |
2890 | if (NILP (window)) | |
2891 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); | |
1942f68f RS |
2892 | /* If window appears above or below another, |
2893 | even out their heights. */ | |
cac66e4f | 2894 | other = upper = lower = Qnil; |
1942f68f RS |
2895 | if (!NILP (XWINDOW (window)->prev)) |
2896 | other = upper = XWINDOW (window)->prev, lower = window; | |
2897 | if (!NILP (XWINDOW (window)->next)) | |
2898 | other = lower = XWINDOW (window)->next, upper = window; | |
2899 | if (!NILP (other) | |
2900 | /* Check that OTHER and WINDOW are vertically arrayed. */ | |
296b535c KH |
2901 | && !EQ (XWINDOW (other)->top, XWINDOW (window)->top) |
2902 | && (XFASTINT (XWINDOW (other)->height) | |
2903 | > XFASTINT (XWINDOW (window)->height))) | |
1942f68f | 2904 | { |
296b535c KH |
2905 | int total = (XFASTINT (XWINDOW (other)->height) |
2906 | + XFASTINT (XWINDOW (window)->height)); | |
86c8e823 GM |
2907 | enlarge_window (upper, |
2908 | total / 2 - XFASTINT (XWINDOW (upper)->height), | |
f984d4fc | 2909 | 0); |
1942f68f | 2910 | } |
7ab12479 JB |
2911 | } |
2912 | } | |
2913 | else | |
2914 | window = Fget_lru_window (Qnil); | |
2915 | ||
2916 | Fset_window_buffer (window, buffer); | |
d07f802a | 2917 | return display_buffer_1 (window); |
7ab12479 JB |
2918 | } |
2919 | ||
2920 | void | |
2921 | temp_output_buffer_show (buf) | |
2922 | register Lisp_Object buf; | |
2923 | { | |
2924 | register struct buffer *old = current_buffer; | |
2925 | register Lisp_Object window; | |
2926 | register struct window *w; | |
2927 | ||
bccd3dd1 RS |
2928 | XBUFFER (buf)->directory = current_buffer->directory; |
2929 | ||
7ab12479 | 2930 | Fset_buffer (buf); |
c6367666 | 2931 | BUF_SAVE_MODIFF (XBUFFER (buf)) = MODIFF; |
7ab12479 JB |
2932 | BEGV = BEG; |
2933 | ZV = Z; | |
2934 | SET_PT (BEG); | |
b1599b4c | 2935 | XBUFFER (buf)->prevent_redisplay_optimizations_p = 1; |
7ab12479 JB |
2936 | set_buffer_internal (old); |
2937 | ||
2938 | if (!EQ (Vtemp_buffer_show_function, Qnil)) | |
2939 | call1 (Vtemp_buffer_show_function, buf); | |
2940 | else | |
2941 | { | |
53f76081 | 2942 | window = Fdisplay_buffer (buf, Qnil, Qnil); |
7ab12479 | 2943 | |
1ae1a37d | 2944 | if (!EQ (XWINDOW (window)->frame, selected_frame)) |
44fa5b1e | 2945 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window))); |
7ab12479 JB |
2946 | Vminibuf_scroll_window = window; |
2947 | w = XWINDOW (window); | |
d834a2e9 | 2948 | XSETFASTINT (w->hscroll, 0); |
b73ea88e RS |
2949 | set_marker_restricted_both (w->start, buf, 1, 1); |
2950 | set_marker_restricted_both (w->pointm, buf, 1, 1); | |
a58ec57d | 2951 | |
beb4e312 RS |
2952 | /* Run temp-buffer-show-hook, with the chosen window selected |
2953 | and it sbuffer current. */ | |
f52cca03 | 2954 | if (!NILP (Vrun_hooks)) |
2cccc823 | 2955 | { |
f52cca03 RS |
2956 | Lisp_Object tem; |
2957 | tem = Fboundp (Qtemp_buffer_show_hook); | |
2cccc823 RS |
2958 | if (!NILP (tem)) |
2959 | { | |
f52cca03 RS |
2960 | tem = Fsymbol_value (Qtemp_buffer_show_hook); |
2961 | if (!NILP (tem)) | |
2962 | { | |
2963 | int count = specpdl_ptr - specpdl; | |
b7354ddf RS |
2964 | Lisp_Object prev_window; |
2965 | prev_window = selected_window; | |
2cccc823 | 2966 | |
f52cca03 | 2967 | /* Select the window that was chosen, for running the hook. */ |
65a04b96 | 2968 | record_unwind_protect (Fselect_window, prev_window); |
b7354ddf | 2969 | select_window_1 (window, 0); |
beb4e312 | 2970 | Fset_buffer (w->buffer); |
f52cca03 | 2971 | call1 (Vrun_hooks, Qtemp_buffer_show_hook); |
b7354ddf | 2972 | select_window_1 (prev_window, 0); |
f52cca03 RS |
2973 | unbind_to (count, Qnil); |
2974 | } | |
2cccc823 RS |
2975 | } |
2976 | } | |
2977 | } | |
7ab12479 JB |
2978 | } |
2979 | \f | |
dfcf069d | 2980 | static void |
7ab12479 JB |
2981 | make_dummy_parent (window) |
2982 | Lisp_Object window; | |
2983 | { | |
cffec418 | 2984 | Lisp_Object new; |
7ab12479 | 2985 | register struct window *o, *p; |
cffec418 KH |
2986 | register struct Lisp_Vector *vec; |
2987 | int i; | |
7ab12479 | 2988 | |
cffec418 KH |
2989 | o = XWINDOW (window); |
2990 | vec = allocate_vectorlike ((EMACS_INT)VECSIZE (struct window)); | |
2991 | for (i = 0; i < VECSIZE (struct window); ++i) | |
2992 | vec->contents[i] = ((struct Lisp_Vector *)o)->contents[i]; | |
2993 | vec->size = VECSIZE (struct window); | |
2994 | p = (struct window *)vec; | |
2995 | XSETWINDOW (new, p); | |
7ab12479 | 2996 | |
d834a2e9 | 2997 | XSETFASTINT (p->sequence_number, ++sequence_number); |
7ab12479 JB |
2998 | |
2999 | /* Put new into window structure in place of window */ | |
3000 | replace_window (window, new); | |
3001 | ||
3002 | o->next = Qnil; | |
3003 | o->prev = Qnil; | |
3004 | o->vchild = Qnil; | |
3005 | o->hchild = Qnil; | |
3006 | o->parent = new; | |
3007 | ||
3008 | p->start = Qnil; | |
3009 | p->pointm = Qnil; | |
3010 | p->buffer = Qnil; | |
3011 | } | |
3012 | ||
3013 | DEFUN ("split-window", Fsplit_window, Ssplit_window, 0, 3, "", | |
3014 | "Split WINDOW, putting SIZE lines in the first of the pair.\n\ | |
3015 | WINDOW defaults to selected one and SIZE to half its size.\n\ | |
77ae0fe3 | 3016 | If optional third arg HORFLAG is non-nil, split side by side\n\ |
10f96191 RS |
3017 | and put SIZE columns in the first of the pair. In that case,\n\ |
3018 | SIZE includes that window's scroll bar, or the divider column to its right.") | |
77ae0fe3 KH |
3019 | (window, size, horflag) |
3020 | Lisp_Object window, size, horflag; | |
7ab12479 JB |
3021 | { |
3022 | register Lisp_Object new; | |
3023 | register struct window *o, *p; | |
c0807608 | 3024 | FRAME_PTR fo; |
77ae0fe3 | 3025 | register int size_int; |
7ab12479 | 3026 | |
265a9e55 | 3027 | if (NILP (window)) |
7ab12479 JB |
3028 | window = selected_window; |
3029 | else | |
605be8af | 3030 | CHECK_LIVE_WINDOW (window, 0); |
7ab12479 JB |
3031 | |
3032 | o = XWINDOW (window); | |
c0807608 | 3033 | fo = XFRAME (WINDOW_FRAME (o)); |
7ab12479 | 3034 | |
77ae0fe3 | 3035 | if (NILP (size)) |
7ab12479 | 3036 | { |
265a9e55 | 3037 | if (!NILP (horflag)) |
c0807608 | 3038 | /* Calculate the size of the left-hand window, by dividing |
25b33244 KH |
3039 | the usable space in columns by two. |
3040 | We round up, since the left-hand window may include | |
3041 | a dividing line, while the right-hand may not. */ | |
3042 | size_int = (XFASTINT (o->width) + 1) >> 1; | |
7ab12479 | 3043 | else |
77ae0fe3 | 3044 | size_int = XFASTINT (o->height) >> 1; |
7ab12479 JB |
3045 | } |
3046 | else | |
3047 | { | |
77ae0fe3 KH |
3048 | CHECK_NUMBER (size, 1); |
3049 | size_int = XINT (size); | |
7ab12479 JB |
3050 | } |
3051 | ||
3052 | if (MINI_WINDOW_P (o)) | |
3053 | error ("Attempt to split minibuffer window"); | |
233a4a2c GM |
3054 | else if (window_fixed_size_p (o, !NILP (horflag), 0)) |
3055 | error ("Attempt to split fixed-size window"); | |
7ab12479 | 3056 | |
a481b3ea | 3057 | check_min_window_sizes (); |
7ab12479 | 3058 | |
265a9e55 | 3059 | if (NILP (horflag)) |
7ab12479 | 3060 | { |
77ae0fe3 KH |
3061 | if (size_int < window_min_height) |
3062 | error ("Window height %d too small (after splitting)", size_int); | |
3063 | if (size_int + window_min_height > XFASTINT (o->height)) | |
37962e60 | 3064 | error ("Window height %d too small (after splitting)", |
77ae0fe3 | 3065 | XFASTINT (o->height) - size_int); |
265a9e55 JB |
3066 | if (NILP (o->parent) |
3067 | || NILP (XWINDOW (o->parent)->vchild)) | |
7ab12479 JB |
3068 | { |
3069 | make_dummy_parent (window); | |
3070 | new = o->parent; | |
3071 | XWINDOW (new)->vchild = window; | |
3072 | } | |
3073 | } | |
3074 | else | |
3075 | { | |
77ae0fe3 KH |
3076 | if (size_int < window_min_width) |
3077 | error ("Window width %d too small (after splitting)", size_int); | |
a59fed7e RS |
3078 | |
3079 | if (size_int + window_min_width > XFASTINT (o->width)) | |
37962e60 | 3080 | error ("Window width %d too small (after splitting)", |
a59fed7e | 3081 | XFASTINT (o->width) - size_int); |
265a9e55 JB |
3082 | if (NILP (o->parent) |
3083 | || NILP (XWINDOW (o->parent)->hchild)) | |
7ab12479 JB |
3084 | { |
3085 | make_dummy_parent (window); | |
3086 | new = o->parent; | |
3087 | XWINDOW (new)->hchild = window; | |
3088 | } | |
3089 | } | |
3090 | ||
3091 | /* Now we know that window's parent is a vertical combination | |
3092 | if we are dividing vertically, or a horizontal combination | |
3093 | if we are making side-by-side windows */ | |
3094 | ||
3095 | windows_or_buffers_changed++; | |
c0807608 | 3096 | FRAME_WINDOW_SIZES_CHANGED (fo) = 1; |
7ab12479 JB |
3097 | new = make_window (); |
3098 | p = XWINDOW (new); | |
3099 | ||
44fa5b1e | 3100 | p->frame = o->frame; |
7ab12479 | 3101 | p->next = o->next; |
265a9e55 | 3102 | if (!NILP (p->next)) |
7ab12479 JB |
3103 | XWINDOW (p->next)->prev = new; |
3104 | p->prev = window; | |
3105 | o->next = new; | |
3106 | p->parent = o->parent; | |
3107 | p->buffer = Qt; | |
5500c422 GM |
3108 | p->window_end_valid = Qnil; |
3109 | bzero (&p->last_cursor, sizeof p->last_cursor); | |
7ab12479 | 3110 | |
44fa5b1e | 3111 | /* Apportion the available frame space among the two new windows */ |
7ab12479 | 3112 | |
265a9e55 | 3113 | if (!NILP (horflag)) |
7ab12479 JB |
3114 | { |
3115 | p->height = o->height; | |
3116 | p->top = o->top; | |
a59fed7e | 3117 | XSETFASTINT (p->width, XFASTINT (o->width) - size_int); |
77ae0fe3 KH |
3118 | XSETFASTINT (o->width, size_int); |
3119 | XSETFASTINT (p->left, XFASTINT (o->left) + size_int); | |
7ab12479 JB |
3120 | } |
3121 | else | |
3122 | { | |
3123 | p->left = o->left; | |
3124 | p->width = o->width; | |
77ae0fe3 KH |
3125 | XSETFASTINT (p->height, XFASTINT (o->height) - size_int); |
3126 | XSETFASTINT (o->height, size_int); | |
3127 | XSETFASTINT (p->top, XFASTINT (o->top) + size_int); | |
7ab12479 JB |
3128 | } |
3129 | ||
5500c422 GM |
3130 | /* Adjust glyph matrices. */ |
3131 | adjust_glyphs (fo); | |
543f5fb1 | 3132 | Fset_window_buffer (new, o->buffer); |
7ab12479 JB |
3133 | return new; |
3134 | } | |
3135 | \f | |
3136 | DEFUN ("enlarge-window", Fenlarge_window, Senlarge_window, 1, 2, "p", | |
3137 | "Make current window ARG lines bigger.\n\ | |
3138 | From program, optional second arg non-nil means grow sideways ARG columns.") | |
413430c5 EN |
3139 | (arg, side) |
3140 | register Lisp_Object arg, side; | |
7ab12479 | 3141 | { |
413430c5 | 3142 | CHECK_NUMBER (arg, 0); |
86c8e823 | 3143 | enlarge_window (selected_window, XINT (arg), !NILP (side)); |
543f5fb1 RS |
3144 | |
3145 | if (! NILP (Vwindow_configuration_change_hook)) | |
3146 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); | |
3147 | ||
7ab12479 JB |
3148 | return Qnil; |
3149 | } | |
3150 | ||
3151 | DEFUN ("shrink-window", Fshrink_window, Sshrink_window, 1, 2, "p", | |
3152 | "Make current window ARG lines smaller.\n\ | |
413430c5 EN |
3153 | From program, optional second arg non-nil means shrink sideways arg columns.") |
3154 | (arg, side) | |
3155 | register Lisp_Object arg, side; | |
7ab12479 | 3156 | { |
413430c5 | 3157 | CHECK_NUMBER (arg, 0); |
86c8e823 | 3158 | enlarge_window (selected_window, -XINT (arg), !NILP (side)); |
543f5fb1 RS |
3159 | |
3160 | if (! NILP (Vwindow_configuration_change_hook)) | |
3161 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); | |
3162 | ||
7ab12479 JB |
3163 | return Qnil; |
3164 | } | |
3165 | ||
3166 | int | |
3167 | window_height (window) | |
3168 | Lisp_Object window; | |
3169 | { | |
3170 | register struct window *p = XWINDOW (window); | |
3171 | return XFASTINT (p->height); | |
3172 | } | |
3173 | ||
3174 | int | |
3175 | window_width (window) | |
3176 | Lisp_Object window; | |
3177 | { | |
3178 | register struct window *p = XWINDOW (window); | |
3179 | return XFASTINT (p->width); | |
3180 | } | |
3181 | ||
c1636aa6 | 3182 | |
7ab12479 | 3183 | #define CURBEG(w) \ |
3578db3c | 3184 | *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top)) |
7ab12479 JB |
3185 | |
3186 | #define CURSIZE(w) \ | |
3578db3c | 3187 | *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height)) |
7ab12479 | 3188 | |
233a4a2c GM |
3189 | |
3190 | /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means | |
3191 | increase its width. Siblings of the selected window are resized to | |
3192 | fullfil the size request. If they become too small in the process, | |
3193 | they will be deleted. */ | |
7ab12479 | 3194 | |
f984d4fc | 3195 | static void |
86c8e823 GM |
3196 | enlarge_window (window, delta, widthflag) |
3197 | Lisp_Object window; | |
233a4a2c | 3198 | int delta, widthflag; |
7ab12479 | 3199 | { |
86c8e823 | 3200 | Lisp_Object parent, next, prev; |
233a4a2c | 3201 | struct window *p; |
3578db3c KR |
3202 | Lisp_Object *sizep; |
3203 | int maximum; | |
5e14b1fc AS |
3204 | int (*sizefun) P_ ((Lisp_Object)) |
3205 | = widthflag ? window_width : window_height; | |
233a4a2c | 3206 | void (*setsizefun) P_ ((Lisp_Object, int, int)) |
5e14b1fc | 3207 | = (widthflag ? set_window_width : set_window_height); |
7ab12479 | 3208 | |
233a4a2c GM |
3209 | /* Check values of window_min_width and window_min_height for |
3210 | validity. */ | |
a481b3ea | 3211 | check_min_window_sizes (); |
7ab12479 | 3212 | |
233a4a2c | 3213 | /* Give up if this window cannot be resized. */ |
233a4a2c GM |
3214 | if (window_fixed_size_p (XWINDOW (window), widthflag, 1)) |
3215 | error ("Window is not resizable"); | |
3216 | ||
3217 | /* Find the parent of the selected window. */ | |
7ab12479 JB |
3218 | while (1) |
3219 | { | |
3220 | p = XWINDOW (window); | |
3221 | parent = p->parent; | |
233a4a2c | 3222 | |
265a9e55 | 3223 | if (NILP (parent)) |
7ab12479 JB |
3224 | { |
3225 | if (widthflag) | |
3226 | error ("No other window to side of this one"); | |
3227 | break; | |
3228 | } | |
233a4a2c GM |
3229 | |
3230 | if (widthflag | |
3231 | ? !NILP (XWINDOW (parent)->hchild) | |
265a9e55 | 3232 | : !NILP (XWINDOW (parent)->vchild)) |
7ab12479 | 3233 | break; |
233a4a2c | 3234 | |
7ab12479 JB |
3235 | window = parent; |
3236 | } | |
3237 | ||
05c2896a | 3238 | sizep = &CURSIZE (window); |
7ab12479 | 3239 | |
7ab12479 JB |
3240 | { |
3241 | register int maxdelta; | |
7ab12479 | 3242 | |
3578db3c | 3243 | maxdelta = (!NILP (parent) ? (*sizefun) (parent) - XINT (*sizep) |
c1636aa6 GM |
3244 | : !NILP (p->next) ? ((*sizefun) (p->next) |
3245 | - window_min_size (XWINDOW (p->next), | |
f984d4fc | 3246 | widthflag, 0, 0)) |
c1636aa6 GM |
3247 | : !NILP (p->prev) ? ((*sizefun) (p->prev) |
3248 | - window_min_size (XWINDOW (p->prev), | |
f984d4fc | 3249 | widthflag, 0, 0)) |
44fa5b1e JB |
3250 | /* This is a frame with only one window, a minibuffer-only |
3251 | or a minibufferless frame. */ | |
d5783c40 | 3252 | : (delta = 0)); |
7ab12479 JB |
3253 | |
3254 | if (delta > maxdelta) | |
3255 | /* This case traps trying to make the minibuffer | |
44fa5b1e JB |
3256 | the full frame, or make the only window aside from the |
3257 | minibuffer the full frame. */ | |
7ab12479 | 3258 | delta = maxdelta; |
6b54027b | 3259 | } |
d5783c40 | 3260 | |
3578db3c | 3261 | if (XINT (*sizep) + delta < window_min_size (XWINDOW (window), widthflag, 0, 0)) |
6b54027b | 3262 | { |
543f5fb1 | 3263 | delete_window (window); |
d5783c40 | 3264 | return; |
6b54027b RS |
3265 | } |
3266 | ||
3267 | if (delta == 0) | |
3268 | return; | |
7ab12479 | 3269 | |
db98a733 RS |
3270 | /* Find the total we can get from other siblings. */ |
3271 | maximum = 0; | |
3272 | for (next = p->next; ! NILP (next); next = XWINDOW (next)->next) | |
c1636aa6 | 3273 | maximum += (*sizefun) (next) - window_min_size (XWINDOW (next), |
f984d4fc | 3274 | widthflag, 0, 0); |
db98a733 | 3275 | for (prev = p->prev; ! NILP (prev); prev = XWINDOW (prev)->prev) |
c1636aa6 | 3276 | maximum += (*sizefun) (prev) - window_min_size (XWINDOW (prev), |
f984d4fc | 3277 | widthflag, 0, 0); |
db98a733 RS |
3278 | |
3279 | /* If we can get it all from them, do so. */ | |
c6b530ed | 3280 | if (delta <= maximum) |
7ab12479 | 3281 | { |
db98a733 RS |
3282 | Lisp_Object first_unaffected; |
3283 | Lisp_Object first_affected; | |
233a4a2c | 3284 | int fixed_p; |
db98a733 RS |
3285 | |
3286 | next = p->next; | |
3287 | prev = p->prev; | |
3288 | first_affected = window; | |
3289 | /* Look at one sibling at a time, | |
3290 | moving away from this window in both directions alternately, | |
3291 | and take as much as we can get without deleting that sibling. */ | |
233a4a2c | 3292 | while (delta != 0 && (!NILP (next) || !NILP (prev))) |
db98a733 | 3293 | { |
db98a733 RS |
3294 | if (! NILP (next)) |
3295 | { | |
c1636aa6 | 3296 | int this_one = ((*sizefun) (next) |
233a4a2c | 3297 | - window_min_size (XWINDOW (next), |
f984d4fc | 3298 | widthflag, 0, &fixed_p)); |
233a4a2c GM |
3299 | if (!fixed_p) |
3300 | { | |
3301 | if (this_one > delta) | |
3302 | this_one = delta; | |
3303 | ||
3304 | (*setsizefun) (next, (*sizefun) (next) - this_one, 0); | |
3578db3c | 3305 | (*setsizefun) (window, XINT (*sizep) + this_one, 0); |
db98a733 | 3306 | |
233a4a2c GM |
3307 | delta -= this_one; |
3308 | } | |
3309 | ||
db98a733 RS |
3310 | next = XWINDOW (next)->next; |
3311 | } | |
233a4a2c | 3312 | |
db98a733 RS |
3313 | if (delta == 0) |
3314 | break; | |
233a4a2c | 3315 | |
db98a733 RS |
3316 | if (! NILP (prev)) |
3317 | { | |
c1636aa6 | 3318 | int this_one = ((*sizefun) (prev) |
233a4a2c | 3319 | - window_min_size (XWINDOW (prev), |
f984d4fc | 3320 | widthflag, 0, &fixed_p)); |
233a4a2c GM |
3321 | if (!fixed_p) |
3322 | { | |
3323 | if (this_one > delta) | |
3324 | this_one = delta; | |
3325 | ||
3326 | first_affected = prev; | |
3327 | ||
3328 | (*setsizefun) (prev, (*sizefun) (prev) - this_one, 0); | |
3578db3c | 3329 | (*setsizefun) (window, XINT (*sizep) + this_one, 0); |
233a4a2c GM |
3330 | |
3331 | delta -= this_one; | |
3332 | } | |
3333 | ||
db98a733 RS |
3334 | prev = XWINDOW (prev)->prev; |
3335 | } | |
3336 | } | |
3337 | ||
233a4a2c GM |
3338 | xassert (delta == 0); |
3339 | ||
db98a733 RS |
3340 | /* Now recalculate the edge positions of all the windows affected, |
3341 | based on the new sizes. */ | |
3342 | first_unaffected = next; | |
3343 | prev = first_affected; | |
3344 | for (next = XWINDOW (prev)->next; ! EQ (next, first_unaffected); | |
3345 | prev = next, next = XWINDOW (next)->next) | |
3346 | { | |
3578db3c | 3347 | XSETINT (CURBEG (next), XINT (CURBEG (prev)) + (*sizefun) (prev)); |
db98a733 RS |
3348 | /* This does not change size of NEXT, |
3349 | but it propagates the new top edge to its children */ | |
3350 | (*setsizefun) (next, (*sizefun) (next), 0); | |
3351 | } | |
7ab12479 JB |
3352 | } |
3353 | else | |
3354 | { | |
3355 | register int delta1; | |
3356 | register int opht = (*sizefun) (parent); | |
3357 | ||
3358 | /* If trying to grow this window to or beyond size of the parent, | |
3359 | make delta1 so big that, on shrinking back down, | |
3360 | all the siblings end up with less than one line and are deleted. */ | |
3578db3c | 3361 | if (opht <= XINT (*sizep) + delta) |
7ab12479 | 3362 | delta1 = opht * opht * 2; |
7ab12479 | 3363 | else |
233a4a2c GM |
3364 | { |
3365 | /* Otherwise, make delta1 just right so that if we add | |
3366 | delta1 lines to this window and to the parent, and then | |
3367 | shrink the parent back to its original size, the new | |
3368 | proportional size of this window will increase by delta. | |
3369 | ||
3370 | The function size_window will compute the new height h' | |
3371 | of the window from delta1 as: | |
3372 | ||
3373 | e = delta1/n | |
3374 | x = delta1 - delta1/n * n for the 1st resizable child | |
3375 | h' = h + e + x | |
3376 | ||
3377 | where n is the number of children that can be resized. | |
3378 | We can ignore x by choosing a delta1 that is a multiple of | |
3379 | n. We want the height of this window to come out as | |
3380 | ||
3381 | h' = h + delta | |
3382 | ||
3383 | So, delta1 must be | |
3384 | ||
3385 | h + e = h + delta | |
3386 | delta1/n = delta | |
3387 | delta1 = n * delta. | |
3388 | ||
3389 | The number of children n rquals the number of resizable | |
3390 | children of this window + 1 because we know window itself | |
3391 | is resizable (otherwise we would have signalled an error. */ | |
3392 | ||
3393 | struct window *w = XWINDOW (window); | |
3394 | Lisp_Object s; | |
3395 | int n = 1; | |
3396 | ||
3397 | for (s = w->next; !NILP (s); s = XWINDOW (s)->next) | |
3398 | if (!window_fixed_size_p (XWINDOW (s), widthflag, 0)) | |
3399 | ++n; | |
3400 | for (s = w->prev; !NILP (s); s = XWINDOW (s)->prev) | |
3401 | if (!window_fixed_size_p (XWINDOW (s), widthflag, 0)) | |
3402 | ++n; | |
3403 | ||
3404 | delta1 = n * delta; | |
3405 | } | |
7ab12479 JB |
3406 | |
3407 | /* Add delta1 lines or columns to this window, and to the parent, | |
3408 | keeping things consistent while not affecting siblings. */ | |
3578db3c KR |
3409 | XSETINT (CURSIZE (parent), opht + delta1); |
3410 | (*setsizefun) (window, XINT (*sizep) + delta1, 0); | |
7ab12479 JB |
3411 | |
3412 | /* Squeeze out delta1 lines or columns from our parent, | |
3413 | shriking this window and siblings proportionately. | |
3414 | This brings parent back to correct size. | |
3415 | Delta1 was calculated so this makes this window the desired size, | |
3416 | taking it all out of the siblings. */ | |
3417 | (*setsizefun) (parent, opht, 0); | |
3418 | } | |
3419 | ||
d834a2e9 | 3420 | XSETFASTINT (p->last_modified, 0); |
3cd21523 | 3421 | XSETFASTINT (p->last_overlay_modified, 0); |
5500c422 GM |
3422 | |
3423 | /* Adjust glyph matrices. */ | |
3424 | adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
7ab12479 | 3425 | } |
c1636aa6 | 3426 | |
7ab12479 JB |
3427 | #undef CURBEG |
3428 | #undef CURSIZE | |
3429 | ||
5500c422 | 3430 | |
f984d4fc GM |
3431 | \f |
3432 | /*********************************************************************** | |
3433 | Resizing Mini-Windows | |
3434 | ***********************************************************************/ | |
3435 | ||
3436 | static void shrink_window_lowest_first P_ ((struct window *, int)); | |
f984d4fc | 3437 | |
43b4a21f GM |
3438 | enum save_restore_action |
3439 | { | |
3440 | CHECK_ORIG_SIZES, | |
3441 | SAVE_ORIG_SIZES, | |
3442 | RESTORE_ORIG_SIZES | |
3443 | }; | |
3444 | ||
3445 | static int save_restore_orig_size P_ ((struct window *, | |
3446 | enum save_restore_action)); | |
f984d4fc GM |
3447 | |
3448 | /* Shrink windows rooted in window W to HEIGHT. Take the space needed | |
3449 | from lowest windows first. */ | |
3450 | ||
3451 | static void | |
3452 | shrink_window_lowest_first (w, height) | |
3453 | struct window *w; | |
3454 | int height; | |
3455 | { | |
3456 | struct window *c; | |
3457 | Lisp_Object child; | |
3458 | int old_height; | |
3459 | ||
3460 | xassert (!MINI_WINDOW_P (w)); | |
3461 | ||
3462 | /* Set redisplay hints. */ | |
3463 | XSETFASTINT (w->last_modified, 0); | |
3464 | XSETFASTINT (w->last_overlay_modified, 0); | |
3465 | windows_or_buffers_changed++; | |
3466 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1; | |
3467 | ||
3468 | old_height = XFASTINT (w->height); | |
3469 | XSETFASTINT (w->height, height); | |
3470 | ||
3471 | if (!NILP (w->hchild)) | |
3472 | { | |
3473 | for (child = w->hchild; !NILP (child); child = c->next) | |
3474 | { | |
3475 | c = XWINDOW (child); | |
3476 | c->top = w->top; | |
3477 | shrink_window_lowest_first (c, height); | |
3478 | } | |
3479 | } | |
3480 | else if (!NILP (w->vchild)) | |
3481 | { | |
3482 | Lisp_Object last_child; | |
3483 | int delta = old_height - height; | |
3484 | int last_top; | |
6bbd7a29 GM |
3485 | |
3486 | last_child = Qnil; | |
f984d4fc GM |
3487 | |
3488 | /* Find the last child. We are taking space from lowest windows | |
3489 | first, so we iterate over children from the last child | |
3490 | backwards. */ | |
3491 | for (child = w->vchild; !NILP (child); child = XWINDOW (child)->next) | |
3492 | last_child = child; | |
3493 | ||
3494 | /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */ | |
3495 | for (child = last_child; delta && !NILP (child); child = c->prev) | |
3496 | { | |
3497 | int this_one; | |
3498 | ||
3499 | c = XWINDOW (child); | |
3500 | this_one = XFASTINT (c->height) - MIN_SAFE_WINDOW_HEIGHT; | |
3501 | ||
3502 | if (this_one > delta) | |
3503 | this_one = delta; | |
3504 | ||
3505 | shrink_window_lowest_first (c, XFASTINT (c->height) - this_one); | |
3506 | delta -= this_one; | |
3507 | } | |
3508 | ||
3509 | /* Compute new positions. */ | |
3578db3c | 3510 | last_top = XINT (w->top); |
f984d4fc GM |
3511 | for (child = w->vchild; !NILP (child); child = c->next) |
3512 | { | |
3513 | c = XWINDOW (child); | |
3514 | c->top = make_number (last_top); | |
3515 | shrink_window_lowest_first (c, XFASTINT (c->height)); | |
3516 | last_top += XFASTINT (c->height); | |
3517 | } | |
3518 | } | |
3519 | } | |
3520 | ||
3521 | ||
43b4a21f GM |
3522 | /* Save, restore, or check positions and sizes in the window tree |
3523 | rooted at W. ACTION says what to do. | |
f984d4fc | 3524 | |
43b4a21f GM |
3525 | If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height |
3526 | members are valid for all windows in the window tree. Value is | |
3527 | non-zero if they are valid. | |
3528 | ||
3529 | If ACTION is SAVE_ORIG_SIZES, save members top and height in | |
3530 | orig_top and orig_height for all windows in the tree. | |
3531 | ||
3532 | If ACTION is RESTORE_ORIG_SIZES, restore top and height from | |
3533 | values stored in orig_top and orig_height for all windows. */ | |
3534 | ||
3535 | static int | |
3536 | save_restore_orig_size (w, action) | |
f984d4fc | 3537 | struct window *w; |
43b4a21f | 3538 | enum save_restore_action action; |
f984d4fc | 3539 | { |
43b4a21f GM |
3540 | int success_p = 1; |
3541 | ||
f984d4fc GM |
3542 | while (w) |
3543 | { | |
3544 | if (!NILP (w->hchild)) | |
43b4a21f GM |
3545 | { |
3546 | if (!save_restore_orig_size (XWINDOW (w->hchild), action)) | |
3547 | success_p = 0; | |
3548 | } | |
f984d4fc | 3549 | else if (!NILP (w->vchild)) |
43b4a21f GM |
3550 | { |
3551 | if (!save_restore_orig_size (XWINDOW (w->vchild), action)) | |
3552 | success_p = 0; | |
3553 | } | |
f984d4fc | 3554 | |
43b4a21f | 3555 | switch (action) |
f984d4fc | 3556 | { |
43b4a21f GM |
3557 | case CHECK_ORIG_SIZES: |
3558 | if (!INTEGERP (w->orig_top) || !INTEGERP (w->orig_height)) | |
3559 | return 0; | |
3560 | break; | |
3561 | ||
3562 | case SAVE_ORIG_SIZES: | |
f984d4fc GM |
3563 | w->orig_top = w->top; |
3564 | w->orig_height = w->height; | |
43b4a21f GM |
3565 | XSETFASTINT (w->last_modified, 0); |
3566 | XSETFASTINT (w->last_overlay_modified, 0); | |
3567 | break; | |
3568 | ||
3569 | case RESTORE_ORIG_SIZES: | |
f984d4fc GM |
3570 | xassert (INTEGERP (w->orig_top) && INTEGERP (w->orig_height)); |
3571 | w->top = w->orig_top; | |
3572 | w->height = w->orig_height; | |
3573 | w->orig_height = w->orig_top = Qnil; | |
43b4a21f GM |
3574 | XSETFASTINT (w->last_modified, 0); |
3575 | XSETFASTINT (w->last_overlay_modified, 0); | |
3576 | break; | |
3577 | ||
3578 | default: | |
3579 | abort (); | |
f984d4fc | 3580 | } |
43b4a21f | 3581 | |
f984d4fc GM |
3582 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
3583 | } | |
43b4a21f GM |
3584 | |
3585 | return success_p; | |
f984d4fc GM |
3586 | } |
3587 | ||
3588 | ||
3589 | /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can | |
3590 | without deleting other windows. */ | |
3591 | ||
3592 | void | |
3593 | grow_mini_window (w, delta) | |
3594 | struct window *w; | |
3595 | int delta; | |
3596 | { | |
3597 | struct frame *f = XFRAME (w->frame); | |
3598 | struct window *root; | |
3599 | ||
3600 | xassert (MINI_WINDOW_P (w)); | |
3601 | xassert (delta >= 0); | |
3602 | ||
3603 | /* Check values of window_min_width and window_min_height for | |
3604 | validity. */ | |
3605 | check_min_window_sizes (); | |
3606 | ||
3607 | /* Compute how much we can enlarge the mini-window without deleting | |
3608 | other windows. */ | |
3609 | root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3610 | if (delta) | |
3611 | { | |
3612 | int min_height = window_min_size (root, 0, 0, 0); | |
3613 | if (XFASTINT (root->height) - delta < min_height) | |
3614 | delta = XFASTINT (root->height) - min_height; | |
3615 | } | |
3616 | ||
3617 | if (delta) | |
3618 | { | |
3619 | /* Save original window sizes and positions, if not already done. */ | |
43b4a21f GM |
3620 | if (!save_restore_orig_size (root, CHECK_ORIG_SIZES)) |
3621 | save_restore_orig_size (root, SAVE_ORIG_SIZES); | |
f984d4fc GM |
3622 | |
3623 | /* Shrink other windows. */ | |
3624 | shrink_window_lowest_first (root, XFASTINT (root->height) - delta); | |
3625 | ||
3626 | /* Grow the mini-window. */ | |
3578db3c | 3627 | w->top = make_number (XFASTINT (root->top) + XFASTINT (root->height)); |
f984d4fc GM |
3628 | w->height = make_number (XFASTINT (w->height) + delta); |
3629 | XSETFASTINT (w->last_modified, 0); | |
3630 | XSETFASTINT (w->last_overlay_modified, 0); | |
3631 | ||
3632 | adjust_glyphs (f); | |
3633 | } | |
3634 | } | |
3635 | ||
3636 | ||
86c8e823 GM |
3637 | /* Shrink mini-window W. If there is recorded info about window sizes |
3638 | before a call to grow_mini_window, restore recorded window sizes. | |
3639 | Otherwise, if the mini-window is higher than 1 line, resize it to 1 | |
3640 | line. */ | |
f984d4fc GM |
3641 | |
3642 | void | |
3643 | shrink_mini_window (w) | |
3644 | struct window *w; | |
3645 | { | |
3646 | struct frame *f = XFRAME (w->frame); | |
3647 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3648 | ||
43b4a21f | 3649 | if (save_restore_orig_size (root, CHECK_ORIG_SIZES)) |
f984d4fc | 3650 | { |
43b4a21f | 3651 | save_restore_orig_size (root, RESTORE_ORIG_SIZES); |
f984d4fc GM |
3652 | adjust_glyphs (f); |
3653 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; | |
3654 | windows_or_buffers_changed = 1; | |
3655 | } | |
86c8e823 GM |
3656 | else if (XFASTINT (w->height) > 1) |
3657 | { | |
3658 | Lisp_Object window; | |
3659 | XSETWINDOW (window, w); | |
3660 | enlarge_window (window, 1 - XFASTINT (w->height), 0); | |
3661 | } | |
f984d4fc GM |
3662 | } |
3663 | ||
3664 | ||
3665 | \f | |
5500c422 GM |
3666 | /* Mark window cursors off for all windows in the window tree rooted |
3667 | at W by setting their phys_cursor_on_p flag to zero. Called from | |
3668 | xterm.c, e.g. when a frame is cleared and thereby all cursors on | |
3669 | the frame are cleared. */ | |
3670 | ||
3671 | void | |
3672 | mark_window_cursors_off (w) | |
3673 | struct window *w; | |
3674 | { | |
3675 | while (w) | |
3676 | { | |
3677 | if (!NILP (w->hchild)) | |
3678 | mark_window_cursors_off (XWINDOW (w->hchild)); | |
3679 | else if (!NILP (w->vchild)) | |
3680 | mark_window_cursors_off (XWINDOW (w->vchild)); | |
3681 | else | |
3682 | w->phys_cursor_on_p = 0; | |
3683 | ||
3684 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3685 | } | |
3686 | } | |
3687 | ||
3688 | ||
7ab12479 JB |
3689 | /* Return number of lines of text (not counting mode line) in W. */ |
3690 | ||
3691 | int | |
3692 | window_internal_height (w) | |
3693 | struct window *w; | |
3694 | { | |
3695 | int ht = XFASTINT (w->height); | |
3696 | ||
3697 | if (MINI_WINDOW_P (w)) | |
3698 | return ht; | |
3699 | ||
265a9e55 JB |
3700 | if (!NILP (w->parent) || !NILP (w->vchild) || !NILP (w->hchild) |
3701 | || !NILP (w->next) || !NILP (w->prev) | |
44fa5b1e | 3702 | || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w)))) |
7ab12479 JB |
3703 | return ht - 1; |
3704 | ||
3705 | return ht; | |
3706 | } | |
3707 | ||
535e0b8e JB |
3708 | |
3709 | /* Return the number of columns in W. | |
a3c87d4e | 3710 | Don't count columns occupied by scroll bars or the vertical bar |
535e0b8e | 3711 | separating W from the sibling to its right. */ |
5500c422 | 3712 | |
535e0b8e JB |
3713 | int |
3714 | window_internal_width (w) | |
3715 | struct window *w; | |
3716 | { | |
5500c422 | 3717 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
535e0b8e JB |
3718 | int width = XINT (w->width); |
3719 | ||
a3c87d4e | 3720 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
5500c422 GM |
3721 | /* Scroll bars occupy a few columns. */ |
3722 | width -= FRAME_SCROLL_BAR_COLS (f); | |
3723 | else if (!WINDOW_RIGHTMOST_P (w) && !WINDOW_FULL_WIDTH_P (w)) | |
3724 | /* The column of `|' characters separating side-by-side windows | |
3725 | occupies one column only. */ | |
3726 | width -= 1; | |
3727 | ||
3728 | /* On window-systems, areas to the left and right of the window | |
3729 | are used to display bitmaps there. */ | |
3730 | if (FRAME_WINDOW_P (f)) | |
b46dfc64 | 3731 | width -= FRAME_FLAGS_AREA_COLS (f); |
111e5992 RS |
3732 | |
3733 | return width; | |
535e0b8e JB |
3734 | } |
3735 | ||
5500c422 GM |
3736 | \f |
3737 | /************************************************************************ | |
3738 | Window Scrolling | |
3739 | ***********************************************************************/ | |
535e0b8e | 3740 | |
5500c422 GM |
3741 | /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll |
3742 | one screen-full, which is defined as the height of the window minus | |
3743 | next_screen_context_lines. If WHOLE is zero, scroll up N lines | |
3744 | instead. Negative values of N mean scroll down. NOERROR non-zero | |
3745 | means don't signal an error if we try to move over BEGV or ZV, | |
3746 | respectively. */ | |
7ab12479 | 3747 | |
101d1605 RS |
3748 | static void |
3749 | window_scroll (window, n, whole, noerror) | |
7ab12479 JB |
3750 | Lisp_Object window; |
3751 | int n; | |
101d1605 | 3752 | int whole; |
f8026fd8 | 3753 | int noerror; |
5500c422 GM |
3754 | { |
3755 | /* If we must, use the pixel-based version which is much slower than | |
3756 | the line-based one but can handle varying line heights. */ | |
3757 | if (FRAME_WINDOW_P (XFRAME (XWINDOW (window)->frame))) | |
3758 | window_scroll_pixel_based (window, n, whole, noerror); | |
3759 | else | |
3760 | window_scroll_line_based (window, n, whole, noerror); | |
3761 | } | |
3762 | ||
3763 | ||
3764 | /* Implementation of window_scroll that works based on pixel line | |
3765 | heights. See the comment of window_scroll for parameter | |
3766 | descriptions. */ | |
3767 | ||
3768 | static void | |
3769 | window_scroll_pixel_based (window, n, whole, noerror) | |
3770 | Lisp_Object window; | |
3771 | int n; | |
3772 | int whole; | |
3773 | int noerror; | |
3774 | { | |
3775 | struct it it; | |
3776 | struct window *w = XWINDOW (window); | |
3777 | struct text_pos start; | |
3778 | Lisp_Object tem; | |
3779 | int this_scroll_margin; | |
3780 | int preserve_y; | |
3781 | ||
3782 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
3783 | ||
3784 | /* If PT is not visible in WINDOW, move back one half of | |
3785 | the screen. */ | |
3786 | XSETFASTINT (tem, PT); | |
3787 | tem = Fpos_visible_in_window_p (tem, window); | |
3788 | if (NILP (tem)) | |
3789 | { | |
3790 | /* Move backward half the height of the window. Performance note: | |
3791 | vmotion used here is about 10% faster, but would give wrong | |
3792 | results for variable height lines. */ | |
3793 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
3794 | it.current_y = it.last_visible_y; | |
3795 | move_it_vertically (&it, -it.last_visible_y / 2); | |
3796 | ||
3797 | /* The function move_iterator_vertically may move over more than | |
3798 | the specified y-distance. If it->w is small, e.g. a | |
3799 | mini-buffer window, we may end up in front of the window's | |
3800 | display area. This is the case when Start displaying at the | |
3801 | start of the line containing PT in this case. */ | |
3802 | if (it.current_y <= 0) | |
3803 | { | |
3804 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
3805 | move_it_vertically (&it, 0); | |
3806 | it.current_y = 0; | |
3807 | } | |
3808 | ||
3809 | start = it.current.pos; | |
3810 | } | |
3811 | ||
3812 | /* If scroll_preserve_screen_position is non-zero, we try to set | |
3813 | point in the same window line as it is now, so get that line. */ | |
3814 | if (!NILP (Vscroll_preserve_screen_position)) | |
3815 | { | |
3816 | start_display (&it, w, start); | |
3817 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
3818 | preserve_y = it.current_y; | |
3819 | } | |
3820 | else | |
3821 | preserve_y = -1; | |
3822 | ||
3823 | /* Move iterator it from start the specified distance forward or | |
3824 | backward. The result is the new window start. */ | |
3825 | start_display (&it, w, start); | |
3826 | if (whole) | |
3827 | { | |
3828 | int screen_full = (it.last_visible_y | |
3829 | - next_screen_context_lines * CANON_Y_UNIT (it.f)); | |
3830 | int direction = n < 0 ? -1 : 1; | |
3831 | move_it_vertically (&it, direction * screen_full); | |
3832 | } | |
3833 | else | |
3834 | move_it_by_lines (&it, n, 1); | |
3835 | ||
3836 | /* End if we end up at ZV or BEGV. */ | |
3837 | if ((n > 0 && IT_CHARPOS (it) == ZV) | |
3838 | || (n < 0 && IT_CHARPOS (it) == CHARPOS (start))) | |
3839 | { | |
3840 | if (noerror) | |
3841 | return; | |
3842 | else if (IT_CHARPOS (it) == ZV) | |
3843 | Fsignal (Qend_of_buffer, Qnil); | |
3844 | else | |
3845 | Fsignal (Qbeginning_of_buffer, Qnil); | |
3846 | } | |
3847 | ||
3848 | /* Set the window start, and set up the window for redisplay. */ | |
3849 | set_marker_restricted (w->start, make_number (IT_CHARPOS (it)), w->buffer); | |
3850 | w->start_at_line_beg = Fbolp (); | |
3851 | w->update_mode_line = Qt; | |
3852 | XSETFASTINT (w->last_modified, 0); | |
3853 | XSETFASTINT (w->last_overlay_modified, 0); | |
3854 | /* Set force_start so that redisplay_window will run the | |
3855 | window-scroll-functions. */ | |
3856 | w->force_start = Qt; | |
3857 | ||
3858 | it.current_y = it.vpos = 0; | |
3859 | ||
3860 | /* Preserve the screen position if we must. */ | |
3861 | if (preserve_y >= 0) | |
3862 | { | |
3863 | move_it_to (&it, -1, -1, preserve_y, -1, MOVE_TO_Y); | |
3864 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); | |
3865 | } | |
3866 | else | |
3867 | { | |
3868 | /* Move PT out of scroll margins. */ | |
3869 | this_scroll_margin = max (0, scroll_margin); | |
3870 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
3871 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
3872 | ||
3873 | if (n > 0) | |
3874 | { | |
3875 | /* We moved the window start towards ZV, so PT may be now | |
3876 | in the scroll margin at the top. */ | |
3877 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
3878 | while (it.current_y < this_scroll_margin) | |
3879 | move_it_by_lines (&it, 1, 1); | |
3880 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); | |
3881 | } | |
3882 | else if (n < 0) | |
3883 | { | |
3884 | /* We moved the window start towards BEGV, so PT may be now | |
3885 | in the scroll margin at the bottom. */ | |
3886 | move_it_to (&it, PT, -1, | |
3887 | it.last_visible_y - this_scroll_margin - 1, -1, | |
3888 | MOVE_TO_POS | MOVE_TO_Y); | |
3889 | ||
3890 | /* Don't put point on a partially visible line at the end. */ | |
3891 | if (it.current_y + it.max_ascent + it.max_descent | |
3892 | > it.last_visible_y) | |
3893 | move_it_by_lines (&it, -1, 0); | |
3894 | ||
3895 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); | |
3896 | } | |
3897 | } | |
3898 | } | |
3899 | ||
3900 | ||
3901 | /* Implementation of window_scroll that works based on screen lines. | |
3902 | See the comment of window_scroll for parameter descriptions. */ | |
3903 | ||
3904 | static void | |
3905 | window_scroll_line_based (window, n, whole, noerror) | |
3906 | Lisp_Object window; | |
3907 | int n; | |
3908 | int whole; | |
3909 | int noerror; | |
7ab12479 JB |
3910 | { |
3911 | register struct window *w = XWINDOW (window); | |
5500c422 | 3912 | register int opoint = PT, opoint_byte = PT_BYTE; |
b73ea88e | 3913 | register int pos, pos_byte; |
7ab12479 JB |
3914 | register int ht = window_internal_height (w); |
3915 | register Lisp_Object tem; | |
3916 | int lose; | |
5500c422 | 3917 | Lisp_Object bolp; |
345d45b2 | 3918 | int startpos; |
101d1605 RS |
3919 | struct position posit; |
3920 | int original_vpos; | |
3921 | ||
3922 | startpos = marker_position (w->start); | |
3923 | ||
3924 | posit = *compute_motion (startpos, 0, 0, 0, | |
3925 | PT, ht, 0, | |
3926 | window_internal_width (w), XINT (w->hscroll), | |
3927 | 0, w); | |
3928 | original_vpos = posit.vpos; | |
0a1f771a | 3929 | |
d834a2e9 | 3930 | XSETFASTINT (tem, PT); |
7ab12479 JB |
3931 | tem = Fpos_visible_in_window_p (tem, window); |
3932 | ||
265a9e55 | 3933 | if (NILP (tem)) |
7ab12479 | 3934 | { |
cd2be1dd | 3935 | Fvertical_motion (make_number (- (ht / 2)), window); |
345d45b2 | 3936 | startpos = PT; |
7ab12479 JB |
3937 | } |
3938 | ||
345d45b2 | 3939 | SET_PT (startpos); |
5ce7b543 | 3940 | lose = n < 0 && PT == BEGV; |
540b6aa0 | 3941 | Fvertical_motion (make_number (n), window); |
5ce7b543 | 3942 | pos = PT; |
b73ea88e | 3943 | pos_byte = PT_BYTE; |
7ab12479 | 3944 | bolp = Fbolp (); |
b73ea88e | 3945 | SET_PT_BOTH (opoint, opoint_byte); |
7ab12479 JB |
3946 | |
3947 | if (lose) | |
f8026fd8 JB |
3948 | { |
3949 | if (noerror) | |
3950 | return; | |
3951 | else | |
3952 | Fsignal (Qbeginning_of_buffer, Qnil); | |
3953 | } | |
7ab12479 JB |
3954 | |
3955 | if (pos < ZV) | |
7ab12479 | 3956 | { |
0c7da84e RS |
3957 | int this_scroll_margin = scroll_margin; |
3958 | ||
3959 | /* Don't use a scroll margin that is negative or too large. */ | |
3960 | if (this_scroll_margin < 0) | |
3961 | this_scroll_margin = 0; | |
3962 | ||
3963 | if (XINT (w->height) < 4 * scroll_margin) | |
3964 | this_scroll_margin = XINT (w->height) / 4; | |
3965 | ||
b73ea88e | 3966 | set_marker_restricted_both (w->start, w->buffer, pos, pos_byte); |
7ab12479 JB |
3967 | w->start_at_line_beg = bolp; |
3968 | w->update_mode_line = Qt; | |
d834a2e9 | 3969 | XSETFASTINT (w->last_modified, 0); |
3cd21523 | 3970 | XSETFASTINT (w->last_overlay_modified, 0); |
345d45b2 RS |
3971 | /* Set force_start so that redisplay_window will run |
3972 | the window-scroll-functions. */ | |
3973 | w->force_start = Qt; | |
0c7da84e | 3974 | |
5500c422 | 3975 | if (whole && !NILP (Vscroll_preserve_screen_position)) |
0c7da84e | 3976 | { |
b73ea88e | 3977 | SET_PT_BOTH (pos, pos_byte); |
101d1605 | 3978 | Fvertical_motion (make_number (original_vpos), window); |
0c7da84e | 3979 | } |
101d1605 RS |
3980 | /* If we scrolled forward, put point enough lines down |
3981 | that it is outside the scroll margin. */ | |
3982 | else if (n > 0) | |
0c7da84e | 3983 | { |
101d1605 RS |
3984 | int top_margin; |
3985 | ||
3986 | if (this_scroll_margin > 0) | |
3987 | { | |
b73ea88e | 3988 | SET_PT_BOTH (pos, pos_byte); |
101d1605 RS |
3989 | Fvertical_motion (make_number (this_scroll_margin), window); |
3990 | top_margin = PT; | |
3991 | } | |
3992 | else | |
3993 | top_margin = pos; | |
3994 | ||
3995 | if (top_margin <= opoint) | |
b73ea88e | 3996 | SET_PT_BOTH (opoint, opoint_byte); |
5500c422 | 3997 | else if (!NILP (Vscroll_preserve_screen_position)) |
101d1605 | 3998 | { |
b73ea88e | 3999 | SET_PT_BOTH (pos, pos_byte); |
101d1605 RS |
4000 | Fvertical_motion (make_number (original_vpos), window); |
4001 | } | |
9317a85d | 4002 | else |
335406fc | 4003 | SET_PT (top_margin); |
0c7da84e | 4004 | } |
101d1605 | 4005 | else if (n < 0) |
7ab12479 | 4006 | { |
101d1605 RS |
4007 | int bottom_margin; |
4008 | ||
0c7da84e RS |
4009 | /* If we scrolled backward, put point near the end of the window |
4010 | but not within the scroll margin. */ | |
b73ea88e | 4011 | SET_PT_BOTH (pos, pos_byte); |
0c7da84e | 4012 | tem = Fvertical_motion (make_number (ht - this_scroll_margin), window); |
101d1605 RS |
4013 | if (XFASTINT (tem) == ht - this_scroll_margin) |
4014 | bottom_margin = PT; | |
4015 | else | |
4016 | bottom_margin = PT + 1; | |
4017 | ||
4018 | if (bottom_margin > opoint) | |
b73ea88e | 4019 | SET_PT_BOTH (opoint, opoint_byte); |
7ab12479 | 4020 | else |
101d1605 | 4021 | { |
5500c422 | 4022 | if (!NILP (Vscroll_preserve_screen_position)) |
9317a85d | 4023 | { |
b73ea88e | 4024 | SET_PT_BOTH (pos, pos_byte); |
9317a85d RS |
4025 | Fvertical_motion (make_number (original_vpos), window); |
4026 | } | |
4027 | else | |
4028 | Fvertical_motion (make_number (-1), window); | |
101d1605 | 4029 | } |
7ab12479 JB |
4030 | } |
4031 | } | |
4032 | else | |
f8026fd8 JB |
4033 | { |
4034 | if (noerror) | |
4035 | return; | |
4036 | else | |
4037 | Fsignal (Qend_of_buffer, Qnil); | |
4038 | } | |
7ab12479 | 4039 | } |
5500c422 GM |
4040 | |
4041 | ||
4042 | /* Scroll selected_window up or down. If N is nil, scroll a | |
4043 | screen-full which is defined as the height of the window minus | |
4044 | next_screen_context_lines. If N is the symbol `-', scroll. | |
4045 | DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll | |
4046 | up. This is the guts of Fscroll_up and Fscroll_down. */ | |
7ab12479 JB |
4047 | |
4048 | static void | |
4049 | scroll_command (n, direction) | |
5500c422 | 4050 | Lisp_Object n; |
7ab12479 JB |
4051 | int direction; |
4052 | { | |
4053 | register int defalt; | |
4054 | int count = specpdl_ptr - specpdl; | |
4055 | ||
5500c422 GM |
4056 | xassert (abs (direction) == 1); |
4057 | ||
4058 | /* If selected window's buffer isn't current, make it current for | |
4059 | the moment. But don't screw up if window_scroll gets an error. */ | |
7ab12479 | 4060 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) |
95605e15 JB |
4061 | { |
4062 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
4063 | Fset_buffer (XWINDOW (selected_window)->buffer); | |
5500c422 GM |
4064 | |
4065 | /* Make redisplay consider other windows than just selected_window. */ | |
4066 | ++windows_or_buffers_changed; | |
95605e15 | 4067 | } |
7ab12479 JB |
4068 | |
4069 | defalt = (window_internal_height (XWINDOW (selected_window)) | |
4070 | - next_screen_context_lines); | |
4071 | defalt = direction * (defalt < 1 ? 1 : defalt); | |
4072 | ||
265a9e55 | 4073 | if (NILP (n)) |
101d1605 | 4074 | window_scroll (selected_window, defalt, 1, 0); |
7ab12479 | 4075 | else if (EQ (n, Qminus)) |
101d1605 | 4076 | window_scroll (selected_window, - defalt, 1, 0); |
7ab12479 JB |
4077 | else |
4078 | { | |
4079 | n = Fprefix_numeric_value (n); | |
101d1605 | 4080 | window_scroll (selected_window, XINT (n) * direction, 0, 0); |
7ab12479 | 4081 | } |
95605e15 JB |
4082 | |
4083 | unbind_to (count, Qnil); | |
7ab12479 JB |
4084 | } |
4085 | ||
4086 | DEFUN ("scroll-up", Fscroll_up, Sscroll_up, 0, 1, "P", | |
4087 | "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\ | |
4088 | A near full screen is `next-screen-context-lines' less than a full screen.\n\ | |
279e0e0c | 4089 | Negative ARG means scroll downward.\n\ |
dd394ff9 KH |
4090 | If ARG is the atom `-', scroll downward by nearly full screen.\n\ |
4091 | When calling from a program, supply as argument a number, nil, or `-'.") | |
413430c5 EN |
4092 | (arg) |
4093 | Lisp_Object arg; | |
7ab12479 | 4094 | { |
413430c5 | 4095 | scroll_command (arg, 1); |
7ab12479 JB |
4096 | return Qnil; |
4097 | } | |
4098 | ||
4099 | DEFUN ("scroll-down", Fscroll_down, Sscroll_down, 0, 1, "P", | |
a5fcbc4e | 4100 | "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\ |
7ab12479 | 4101 | A near full screen is `next-screen-context-lines' less than a full screen.\n\ |
279e0e0c | 4102 | Negative ARG means scroll upward.\n\ |
dd394ff9 KH |
4103 | If ARG is the atom `-', scroll upward by nearly full screen.\n\ |
4104 | When calling from a program, supply as argument a number, nil, or `-'.") | |
413430c5 EN |
4105 | (arg) |
4106 | Lisp_Object arg; | |
7ab12479 | 4107 | { |
413430c5 | 4108 | scroll_command (arg, -1); |
7ab12479 JB |
4109 | return Qnil; |
4110 | } | |
ccd0664b RS |
4111 | \f |
4112 | DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling, Sother_window_for_scrolling, 0, 0, 0, | |
4113 | "Return the other window for \"other window scroll\" commands.\n\ | |
77b24de6 | 4114 | If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\ |
ccd0664b RS |
4115 | specifies the window.\n\ |
4116 | If `other-window-scroll-buffer' is non-nil, a window\n\ | |
4117 | showing that buffer is used.") | |
eb16ec06 | 4118 | () |
7ab12479 | 4119 | { |
ccd0664b | 4120 | Lisp_Object window; |
7ab12479 JB |
4121 | |
4122 | if (MINI_WINDOW_P (XWINDOW (selected_window)) | |
265a9e55 | 4123 | && !NILP (Vminibuf_scroll_window)) |
7ab12479 JB |
4124 | window = Vminibuf_scroll_window; |
4125 | /* If buffer is specified, scroll that buffer. */ | |
265a9e55 | 4126 | else if (!NILP (Vother_window_scroll_buffer)) |
7ab12479 JB |
4127 | { |
4128 | window = Fget_buffer_window (Vother_window_scroll_buffer, Qnil); | |
265a9e55 | 4129 | if (NILP (window)) |
53f76081 | 4130 | window = Fdisplay_buffer (Vother_window_scroll_buffer, Qt, Qnil); |
7ab12479 JB |
4131 | } |
4132 | else | |
dbc4e1c1 JB |
4133 | { |
4134 | /* Nothing specified; look for a neighboring window on the same | |
4135 | frame. */ | |
4136 | window = Fnext_window (selected_window, Qnil, Qnil); | |
4137 | ||
4138 | if (EQ (window, selected_window)) | |
4139 | /* That didn't get us anywhere; look for a window on another | |
4140 | visible frame. */ | |
4141 | do | |
4142 | window = Fnext_window (window, Qnil, Qt); | |
4143 | while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window)))) | |
4144 | && ! EQ (window, selected_window)); | |
4145 | } | |
4146 | ||
605be8af | 4147 | CHECK_LIVE_WINDOW (window, 0); |
7ab12479 JB |
4148 | |
4149 | if (EQ (window, selected_window)) | |
4150 | error ("There is no other window"); | |
4151 | ||
ccd0664b RS |
4152 | return window; |
4153 | } | |
4154 | ||
4155 | DEFUN ("scroll-other-window", Fscroll_other_window, Sscroll_other_window, 0, 1, "P", | |
4156 | "Scroll next window upward ARG lines; or near full screen if no ARG.\n\ | |
dd394ff9 | 4157 | A near full screen is `next-screen-context-lines' less than a full screen.\n\ |
ccd0664b RS |
4158 | The next window is the one below the current one; or the one at the top\n\ |
4159 | if the current one is at the bottom. Negative ARG means scroll downward.\n\ | |
dd394ff9 KH |
4160 | If ARG is the atom `-', scroll downward by nearly full screen.\n\ |
4161 | When calling from a program, supply as argument a number, nil, or `-'.\n\ | |
ccd0664b RS |
4162 | \n\ |
4163 | If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\ | |
4164 | specifies the window to scroll.\n\ | |
4165 | If `other-window-scroll-buffer' is non-nil, scroll the window\n\ | |
4166 | showing that buffer, popping the buffer up if necessary.") | |
413430c5 EN |
4167 | (arg) |
4168 | register Lisp_Object arg; | |
ccd0664b RS |
4169 | { |
4170 | register Lisp_Object window; | |
2f787aa3 | 4171 | register int defalt; |
ccd0664b RS |
4172 | register struct window *w; |
4173 | register int count = specpdl_ptr - specpdl; | |
4174 | ||
4175 | window = Fother_window_for_scrolling (); | |
4176 | ||
7ab12479 | 4177 | w = XWINDOW (window); |
2f787aa3 KH |
4178 | defalt = window_internal_height (w) - next_screen_context_lines; |
4179 | if (defalt < 1) defalt = 1; | |
7ab12479 JB |
4180 | |
4181 | /* Don't screw up if window_scroll gets an error. */ | |
4182 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
5500c422 | 4183 | ++windows_or_buffers_changed; |
7ab12479 JB |
4184 | |
4185 | Fset_buffer (w->buffer); | |
4186 | SET_PT (marker_position (w->pointm)); | |
4187 | ||
413430c5 | 4188 | if (NILP (arg)) |
101d1605 | 4189 | window_scroll (window, defalt, 1, 1); |
413430c5 | 4190 | else if (EQ (arg, Qminus)) |
101d1605 | 4191 | window_scroll (window, -defalt, 1, 1); |
7ab12479 JB |
4192 | else |
4193 | { | |
413430c5 EN |
4194 | if (CONSP (arg)) |
4195 | arg = Fcar (arg); | |
4196 | CHECK_NUMBER (arg, 0); | |
101d1605 | 4197 | window_scroll (window, XINT (arg), 0, 1); |
7ab12479 JB |
4198 | } |
4199 | ||
b73ea88e | 4200 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
f4e7b2c2 | 4201 | unbind_to (count, Qnil); |
7ab12479 JB |
4202 | |
4203 | return Qnil; | |
4204 | } | |
4205 | \f | |
644b477c | 4206 | DEFUN ("scroll-left", Fscroll_left, Sscroll_left, 0, 1, "P", |
7ab12479 JB |
4207 | "Scroll selected window display ARG columns left.\n\ |
4208 | Default for ARG is window width minus 2.") | |
4209 | (arg) | |
4210 | register Lisp_Object arg; | |
4211 | { | |
4212 | ||
265a9e55 | 4213 | if (NILP (arg)) |
d834a2e9 | 4214 | XSETFASTINT (arg, window_internal_width (XWINDOW (selected_window)) - 2); |
7ab12479 JB |
4215 | else |
4216 | arg = Fprefix_numeric_value (arg); | |
4217 | ||
4218 | return | |
4219 | Fset_window_hscroll (selected_window, | |
4220 | make_number (XINT (XWINDOW (selected_window)->hscroll) | |
4221 | + XINT (arg))); | |
4222 | } | |
4223 | ||
644b477c | 4224 | DEFUN ("scroll-right", Fscroll_right, Sscroll_right, 0, 1, "P", |
7ab12479 JB |
4225 | "Scroll selected window display ARG columns right.\n\ |
4226 | Default for ARG is window width minus 2.") | |
4227 | (arg) | |
4228 | register Lisp_Object arg; | |
4229 | { | |
265a9e55 | 4230 | if (NILP (arg)) |
d834a2e9 | 4231 | XSETFASTINT (arg, window_internal_width (XWINDOW (selected_window)) - 2); |
7ab12479 JB |
4232 | else |
4233 | arg = Fprefix_numeric_value (arg); | |
4234 | ||
4235 | return | |
4236 | Fset_window_hscroll (selected_window, | |
4237 | make_number (XINT (XWINDOW (selected_window)->hscroll) | |
4238 | - XINT (arg))); | |
4239 | } | |
4240 | ||
4241 | DEFUN ("recenter", Frecenter, Srecenter, 0, 1, "P", | |
44fa5b1e | 4242 | "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\ |
7ab12479 | 4243 | The desired position of point is always relative to the current window.\n\ |
44fa5b1e | 4244 | Just C-u as prefix means put point in the center of the window.\n\ |
413430c5 | 4245 | If ARG is omitted or nil, erases the entire frame and then\n\ |
44fa5b1e | 4246 | redraws with point in the center of the current window.") |
413430c5 EN |
4247 | (arg) |
4248 | register Lisp_Object arg; | |
7ab12479 JB |
4249 | { |
4250 | register struct window *w = XWINDOW (selected_window); | |
4251 | register int ht = window_internal_height (w); | |
113d9015 | 4252 | struct position pos; |
478292ed RS |
4253 | struct buffer *buf = XBUFFER (w->buffer); |
4254 | struct buffer *obuf = current_buffer; | |
7ab12479 | 4255 | |
413430c5 | 4256 | if (NILP (arg)) |
7ab12479 | 4257 | { |
44fa5b1e | 4258 | extern int frame_garbaged; |
f02d6d5c KH |
4259 | int i; |
4260 | ||
4261 | /* Invalidate pixel data calculated for all compositions. */ | |
4262 | for (i = 0; i < n_compositions; i++) | |
4263 | composition_table[i]->font = NULL; | |
7ab12479 | 4264 | |
527b6458 | 4265 | Fredraw_frame (w->frame); |
44fa5b1e | 4266 | SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w))); |
413430c5 | 4267 | XSETFASTINT (arg, ht / 2); |
7ab12479 | 4268 | } |
413430c5 | 4269 | else if (CONSP (arg)) /* Just C-u. */ |
7ab12479 | 4270 | { |
413430c5 | 4271 | XSETFASTINT (arg, ht / 2); |
7ab12479 JB |
4272 | } |
4273 | else | |
4274 | { | |
413430c5 EN |
4275 | arg = Fprefix_numeric_value (arg); |
4276 | CHECK_NUMBER (arg, 0); | |
7ab12479 JB |
4277 | } |
4278 | ||
413430c5 EN |
4279 | if (XINT (arg) < 0) |
4280 | XSETINT (arg, XINT (arg) + ht); | |
7ab12479 | 4281 | |
478292ed | 4282 | set_buffer_internal (buf); |
6ec8bbd2 | 4283 | pos = *vmotion (PT, - XINT (arg), w); |
7ab12479 | 4284 | |
b73ea88e RS |
4285 | set_marker_both (w->start, w->buffer, pos.bufpos, pos.bytepos); |
4286 | w->start_at_line_beg = ((pos.bytepos == BEGV_BYTE | |
4287 | || FETCH_BYTE (pos.bytepos - 1) == '\n') | |
113d9015 | 4288 | ? Qt : Qnil); |
7ab12479 | 4289 | w->force_start = Qt; |
478292ed | 4290 | set_buffer_internal (obuf); |
7ab12479 JB |
4291 | |
4292 | return Qnil; | |
4293 | } | |
b7617575 GM |
4294 | |
4295 | ||
4296 | /* Value is the number of lines actually displayed in window W, | |
4297 | as opposed to its height. */ | |
4298 | ||
4299 | static int | |
4300 | displayed_window_lines (w) | |
4301 | struct window *w; | |
4302 | { | |
4303 | struct it it; | |
4304 | struct text_pos start; | |
3091c2a6 | 4305 | int height = window_box_height (w); |
b7617575 GM |
4306 | |
4307 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
4308 | start_display (&it, w, start); | |
3091c2a6 GM |
4309 | move_it_vertically (&it, height); |
4310 | ||
4311 | /* Add in empty lines at the bottom of the window. */ | |
4312 | if (it.current_y < height) | |
4313 | { | |
4314 | struct frame *f = XFRAME (w->frame); | |
4315 | int rest = height - it.current_y; | |
4316 | int lines = (rest + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
4317 | it.vpos += lines; | |
4318 | } | |
4319 | ||
b7617575 GM |
4320 | return it.vpos; |
4321 | } | |
4322 | ||
4323 | ||
7ab12479 JB |
4324 | \f |
4325 | DEFUN ("move-to-window-line", Fmove_to_window_line, Smove_to_window_line, | |
4326 | 1, 1, "P", | |
4327 | "Position point relative to window.\n\ | |
19e3bf0a | 4328 | With no argument, position point at center of window.\n\ |
d81724c7 RS |
4329 | An argument specifies vertical position within the window;\n\ |
4330 | zero means top of window, negative means relative to bottom of window.") | |
7ab12479 | 4331 | (arg) |
b7617575 | 4332 | Lisp_Object arg; |
7ab12479 | 4333 | { |
b7617575 GM |
4334 | struct window *w = XWINDOW (selected_window); |
4335 | int lines, start; | |
540b6aa0 | 4336 | Lisp_Object window; |
7ab12479 | 4337 | |
b7617575 | 4338 | window = selected_window; |
7ab12479 JB |
4339 | start = marker_position (w->start); |
4340 | if (start < BEGV || start > ZV) | |
4341 | { | |
b7617575 | 4342 | int height = window_internal_height (w); |
cd2be1dd | 4343 | Fvertical_motion (make_number (- (height / 2)), window); |
b73ea88e | 4344 | set_marker_both (w->start, w->buffer, PT, PT_BYTE); |
7ab12479 JB |
4345 | w->start_at_line_beg = Fbolp (); |
4346 | w->force_start = Qt; | |
4347 | } | |
4348 | else | |
b73ea88e | 4349 | Fgoto_char (w->start); |
7ab12479 | 4350 | |
b7617575 GM |
4351 | lines = displayed_window_lines (w); |
4352 | if (NILP (arg)) | |
4353 | XSETFASTINT (arg, lines / 2); | |
4354 | else | |
4355 | { | |
4356 | arg = Fprefix_numeric_value (arg); | |
4357 | if (XINT (arg) < 0) | |
4358 | XSETINT (arg, XINT (arg) + lines); | |
4359 | } | |
4360 | ||
540b6aa0 | 4361 | return Fvertical_motion (arg, window); |
7ab12479 | 4362 | } |
5500c422 GM |
4363 | |
4364 | ||
7ab12479 | 4365 | \f |
5500c422 GM |
4366 | /*********************************************************************** |
4367 | Window Configuration | |
4368 | ***********************************************************************/ | |
4369 | ||
7ab12479 JB |
4370 | struct save_window_data |
4371 | { | |
f5ccc0cc | 4372 | EMACS_INT size_from_Lisp_Vector_struct; |
7ab12479 | 4373 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
8f6ea2e9 | 4374 | Lisp_Object frame_width, frame_height, frame_menu_bar_lines; |
9ea173e8 | 4375 | Lisp_Object frame_tool_bar_lines; |
bdc727bf | 4376 | Lisp_Object selected_frame; |
7ab12479 JB |
4377 | Lisp_Object current_window; |
4378 | Lisp_Object current_buffer; | |
4379 | Lisp_Object minibuf_scroll_window; | |
4380 | Lisp_Object root_window; | |
bdc727bf | 4381 | Lisp_Object focus_frame; |
756b6edc RS |
4382 | /* Record the values of window-min-width and window-min-height |
4383 | so that window sizes remain consistent with them. */ | |
4384 | Lisp_Object min_width, min_height; | |
cbff28e8 RS |
4385 | /* A vector, each of whose elements is a struct saved_window |
4386 | for one window. */ | |
7ab12479 JB |
4387 | Lisp_Object saved_windows; |
4388 | }; | |
ff06df24 | 4389 | |
cbff28e8 | 4390 | /* This is saved as a Lisp_Vector */ |
7ab12479 JB |
4391 | struct saved_window |
4392 | { | |
4393 | /* these first two must agree with struct Lisp_Vector in lisp.h */ | |
f5ccc0cc | 4394 | EMACS_INT size_from_Lisp_Vector_struct; |
7ab12479 JB |
4395 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
4396 | ||
4397 | Lisp_Object window; | |
4398 | Lisp_Object buffer, start, pointm, mark; | |
4399 | Lisp_Object left, top, width, height, hscroll; | |
4400 | Lisp_Object parent, prev; | |
4401 | Lisp_Object start_at_line_beg; | |
4402 | Lisp_Object display_table; | |
4403 | }; | |
4404 | #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */ | |
4405 | ||
4406 | #define SAVED_WINDOW_N(swv,n) \ | |
4407 | ((struct saved_window *) (XVECTOR ((swv)->contents[(n)]))) | |
4408 | ||
4409 | DEFUN ("window-configuration-p", Fwindow_configuration_p, Swindow_configuration_p, 1, 1, 0, | |
cbff28e8 | 4410 | "Return t if OBJECT is a window-configuration object.") |
413430c5 EN |
4411 | (object) |
4412 | Lisp_Object object; | |
7ab12479 | 4413 | { |
413430c5 | 4414 | if (WINDOW_CONFIGURATIONP (object)) |
7ab12479 JB |
4415 | return Qt; |
4416 | return Qnil; | |
4417 | } | |
4418 | ||
3f8ab7bd RS |
4419 | DEFUN ("window-configuration-frame", Fwindow_configuration_frame, Swindow_configuration_frame, 1, 1, 0, |
4420 | "Return the frame that CONFIG, a window-configuration object, is about.") | |
4421 | (config) | |
4422 | Lisp_Object config; | |
4423 | { | |
4424 | register struct save_window_data *data; | |
4425 | struct Lisp_Vector *saved_windows; | |
4426 | ||
4427 | if (! WINDOW_CONFIGURATIONP (config)) | |
4428 | wrong_type_argument (Qwindow_configuration_p, config); | |
4429 | ||
4430 | data = (struct save_window_data *) XVECTOR (config); | |
4431 | saved_windows = XVECTOR (data->saved_windows); | |
4432 | return XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; | |
4433 | } | |
4434 | ||
d5b2799e RS |
4435 | DEFUN ("set-window-configuration", Fset_window_configuration, |
4436 | Sset_window_configuration, 1, 1, 0, | |
7ab12479 JB |
4437 | "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\ |
4438 | CONFIGURATION must be a value previously returned\n\ | |
3f8ab7bd RS |
4439 | by `current-window-configuration' (which see).\n\ |
4440 | If CONFIGURATION was made from a frame that is now deleted,\n\ | |
4441 | only frame-independent values can be restored. In this case,\n\ | |
4442 | the return value is nil. Otherwise the value is t.") | |
4443 | (configuration) | |
2f83aebe | 4444 | Lisp_Object configuration; |
7ab12479 | 4445 | { |
7ab12479 JB |
4446 | register struct save_window_data *data; |
4447 | struct Lisp_Vector *saved_windows; | |
7ab12479 | 4448 | Lisp_Object new_current_buffer; |
fd482be5 | 4449 | Lisp_Object frame; |
44fa5b1e | 4450 | FRAME_PTR f; |
d2b35234 | 4451 | int old_point = -1; |
7ab12479 | 4452 | |
017b2bad | 4453 | while (!WINDOW_CONFIGURATIONP (configuration)) |
3f8ab7bd | 4454 | wrong_type_argument (Qwindow_configuration_p, configuration); |
7ab12479 | 4455 | |
2f83aebe | 4456 | data = (struct save_window_data *) XVECTOR (configuration); |
7ab12479 JB |
4457 | saved_windows = XVECTOR (data->saved_windows); |
4458 | ||
7ab12479 | 4459 | new_current_buffer = data->current_buffer; |
265a9e55 | 4460 | if (NILP (XBUFFER (new_current_buffer)->name)) |
7ab12479 | 4461 | new_current_buffer = Qnil; |
d2b35234 RS |
4462 | else |
4463 | { | |
4464 | if (XBUFFER (new_current_buffer) == current_buffer) | |
4465 | old_point = PT; | |
cbff28e8 | 4466 | |
d2b35234 | 4467 | } |
7ab12479 | 4468 | |
fd482be5 JB |
4469 | frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
4470 | f = XFRAME (frame); | |
9ace597f | 4471 | |
fd482be5 JB |
4472 | /* If f is a dead frame, don't bother rebuilding its window tree. |
4473 | However, there is other stuff we should still try to do below. */ | |
4474 | if (FRAME_LIVE_P (f)) | |
7ab12479 | 4475 | { |
fd482be5 JB |
4476 | register struct window *w; |
4477 | register struct saved_window *p; | |
5500c422 GM |
4478 | struct window *root_window; |
4479 | struct window **leaf_windows; | |
4480 | int n_leaf_windows; | |
4481 | int k, i; | |
fd482be5 JB |
4482 | |
4483 | /* If the frame has been resized since this window configuration was | |
4484 | made, we change the frame to the size specified in the | |
4485 | configuration, restore the configuration, and then resize it | |
4486 | back. We keep track of the prevailing height in these variables. */ | |
4487 | int previous_frame_height = FRAME_HEIGHT (f); | |
4488 | int previous_frame_width = FRAME_WIDTH (f); | |
8f6ea2e9 | 4489 | int previous_frame_menu_bar_lines = FRAME_MENU_BAR_LINES (f); |
9ea173e8 | 4490 | int previous_frame_tool_bar_lines = FRAME_TOOL_BAR_LINES (f); |
fd482be5 | 4491 | |
d2b35234 RS |
4492 | /* The mouse highlighting code could get screwed up |
4493 | if it runs during this. */ | |
4494 | BLOCK_INPUT; | |
4495 | ||
fd482be5 JB |
4496 | if (XFASTINT (data->frame_height) != previous_frame_height |
4497 | || XFASTINT (data->frame_width) != previous_frame_width) | |
f8ad443a | 4498 | change_frame_size (f, XFASTINT (data->frame_height), |
2b653806 | 4499 | XFASTINT (data->frame_width), 0, 0, 0); |
e3678b64 | 4500 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
8f6ea2e9 KH |
4501 | if (XFASTINT (data->frame_menu_bar_lines) |
4502 | != previous_frame_menu_bar_lines) | |
f8ad443a | 4503 | x_set_menu_bar_lines (f, data->frame_menu_bar_lines, make_number (0)); |
4314246f | 4504 | #ifdef HAVE_WINDOW_SYSTEM |
9ea173e8 GM |
4505 | if (XFASTINT (data->frame_tool_bar_lines) |
4506 | != previous_frame_tool_bar_lines) | |
4507 | x_set_tool_bar_lines (f, data->frame_tool_bar_lines, make_number (0)); | |
4314246f | 4508 | #endif |
217f2871 | 4509 | #endif |
fd482be5 | 4510 | |
719eaeb1 GM |
4511 | /* "Swap out" point from the selected window |
4512 | into its buffer. We do this now, before | |
4513 | restoring the window contents, and prevent it from | |
4514 | being done later on when we select a new window. */ | |
596ae0cf RS |
4515 | if (! NILP (XWINDOW (selected_window)->buffer)) |
4516 | { | |
4517 | w = XWINDOW (selected_window); | |
4518 | set_marker_both (w->pointm, | |
4519 | w->buffer, | |
4520 | BUF_PT (XBUFFER (w->buffer)), | |
4521 | BUF_PT_BYTE (XBUFFER (w->buffer))); | |
4522 | } | |
4523 | ||
fd482be5 | 4524 | windows_or_buffers_changed++; |
29aeee73 | 4525 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
fd482be5 | 4526 | |
5500c422 GM |
4527 | /* Problem: Freeing all matrices and later allocating them again |
4528 | is a serious redisplay flickering problem. What we would | |
4529 | really like to do is to free only those matrices not reused | |
4530 | below. */ | |
4531 | root_window = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
4532 | leaf_windows | |
4533 | = (struct window **) alloca (count_windows (root_window) | |
4534 | * sizeof (struct window *)); | |
4535 | n_leaf_windows = get_leaf_windows (root_window, leaf_windows, 0); | |
4536 | ||
756b6edc RS |
4537 | /* Temporarily avoid any problems with windows that are smaller |
4538 | than they are supposed to be. */ | |
4539 | window_min_height = 1; | |
4540 | window_min_width = 1; | |
4541 | ||
fd482be5 JB |
4542 | /* Kludge Alert! |
4543 | Mark all windows now on frame as "deleted". | |
4544 | Restoring the new configuration "undeletes" any that are in it. | |
37962e60 | 4545 | |
fd482be5 JB |
4546 | Save their current buffers in their height fields, since we may |
4547 | need it later, if a buffer saved in the configuration is now | |
4548 | dead. */ | |
4549 | delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f))); | |
4550 | ||
4551 | for (k = 0; k < saved_windows->size; k++) | |
4552 | { | |
4553 | p = SAVED_WINDOW_N (saved_windows, k); | |
4554 | w = XWINDOW (p->window); | |
4555 | w->next = Qnil; | |
7ab12479 | 4556 | |
fd482be5 JB |
4557 | if (!NILP (p->parent)) |
4558 | w->parent = SAVED_WINDOW_N (saved_windows, | |
4559 | XFASTINT (p->parent))->window; | |
4560 | else | |
4561 | w->parent = Qnil; | |
7ab12479 | 4562 | |
fd482be5 | 4563 | if (!NILP (p->prev)) |
7ab12479 | 4564 | { |
fd482be5 JB |
4565 | w->prev = SAVED_WINDOW_N (saved_windows, |
4566 | XFASTINT (p->prev))->window; | |
4567 | XWINDOW (w->prev)->next = p->window; | |
4568 | } | |
4569 | else | |
4570 | { | |
4571 | w->prev = Qnil; | |
4572 | if (!NILP (w->parent)) | |
4573 | { | |
4574 | if (EQ (p->width, XWINDOW (w->parent)->width)) | |
4575 | { | |
4576 | XWINDOW (w->parent)->vchild = p->window; | |
4577 | XWINDOW (w->parent)->hchild = Qnil; | |
4578 | } | |
4579 | else | |
4580 | { | |
4581 | XWINDOW (w->parent)->hchild = p->window; | |
4582 | XWINDOW (w->parent)->vchild = Qnil; | |
4583 | } | |
4584 | } | |
4585 | } | |
4586 | ||
4587 | /* If we squirreled away the buffer in the window's height, | |
4588 | restore it now. */ | |
017b2bad | 4589 | if (BUFFERP (w->height)) |
fd482be5 JB |
4590 | w->buffer = w->height; |
4591 | w->left = p->left; | |
4592 | w->top = p->top; | |
4593 | w->width = p->width; | |
4594 | w->height = p->height; | |
4595 | w->hscroll = p->hscroll; | |
4596 | w->display_table = p->display_table; | |
d834a2e9 | 4597 | XSETFASTINT (w->last_modified, 0); |
3cd21523 | 4598 | XSETFASTINT (w->last_overlay_modified, 0); |
fd482be5 JB |
4599 | |
4600 | /* Reinstall the saved buffer and pointers into it. */ | |
4601 | if (NILP (p->buffer)) | |
4602 | w->buffer = p->buffer; | |
4603 | else | |
4604 | { | |
4605 | if (!NILP (XBUFFER (p->buffer)->name)) | |
4606 | /* If saved buffer is alive, install it. */ | |
4607 | { | |
4608 | w->buffer = p->buffer; | |
4609 | w->start_at_line_beg = p->start_at_line_beg; | |
b73ea88e RS |
4610 | set_marker_restricted (w->start, p->start, w->buffer); |
4611 | set_marker_restricted (w->pointm, p->pointm, w->buffer); | |
fd482be5 | 4612 | Fset_marker (XBUFFER (w->buffer)->mark, |
b73ea88e | 4613 | p->mark, w->buffer); |
fd482be5 JB |
4614 | |
4615 | /* As documented in Fcurrent_window_configuration, don't | |
4616 | save the location of point in the buffer which was current | |
4617 | when the window configuration was recorded. */ | |
6b54027b RS |
4618 | if (!EQ (p->buffer, new_current_buffer) |
4619 | && XBUFFER (p->buffer) == current_buffer) | |
fd482be5 JB |
4620 | Fgoto_char (w->pointm); |
4621 | } | |
52a68e98 RS |
4622 | else if (NILP (w->buffer) || NILP (XBUFFER (w->buffer)->name)) |
4623 | /* Else unless window has a live buffer, get one. */ | |
7ab12479 | 4624 | { |
fd482be5 JB |
4625 | w->buffer = Fcdr (Fcar (Vbuffer_alist)); |
4626 | /* This will set the markers to beginning of visible | |
4627 | range. */ | |
4628 | set_marker_restricted (w->start, make_number (0), w->buffer); | |
4629 | set_marker_restricted (w->pointm, make_number (0),w->buffer); | |
4630 | w->start_at_line_beg = Qt; | |
7ab12479 JB |
4631 | } |
4632 | else | |
fd482be5 | 4633 | /* Keeping window's old buffer; make sure the markers |
52a68e98 | 4634 | are real. */ |
7ab12479 | 4635 | { |
fd482be5 JB |
4636 | /* Set window markers at start of visible range. */ |
4637 | if (XMARKER (w->start)->buffer == 0) | |
4638 | set_marker_restricted (w->start, make_number (0), | |
4639 | w->buffer); | |
4640 | if (XMARKER (w->pointm)->buffer == 0) | |
b73ea88e RS |
4641 | set_marker_restricted_both (w->pointm, w->buffer, |
4642 | BUF_PT (XBUFFER (w->buffer)), | |
4643 | BUF_PT_BYTE (XBUFFER (w->buffer))); | |
fd482be5 | 4644 | w->start_at_line_beg = Qt; |
7ab12479 JB |
4645 | } |
4646 | } | |
4647 | } | |
9ace597f | 4648 | |
fd482be5 | 4649 | FRAME_ROOT_WINDOW (f) = data->root_window; |
719eaeb1 GM |
4650 | /* Prevent "swapping out point" in the old selected window |
4651 | using the buffer that has been restored into it. | |
4652 | That swapping out has already been done, | |
4653 | near the beginning of this function. */ | |
4654 | selected_window = Qnil; | |
fd482be5 | 4655 | Fselect_window (data->current_window); |
396a830c RS |
4656 | XBUFFER (XWINDOW (selected_window)->buffer)->last_selected_window |
4657 | = selected_window; | |
7ab12479 | 4658 | |
db269683 | 4659 | if (NILP (data->focus_frame) |
017b2bad | 4660 | || (FRAMEP (data->focus_frame) |
db269683 JB |
4661 | && FRAME_LIVE_P (XFRAME (data->focus_frame)))) |
4662 | Fredirect_frame_focus (frame, data->focus_frame); | |
7ab12479 | 4663 | |
fd482be5 JB |
4664 | #if 0 /* I don't understand why this is needed, and it causes problems |
4665 | when the frame's old selected window has been deleted. */ | |
e4e59717 | 4666 | if (f != selected_frame && FRAME_WINDOW_P (f)) |
9a7c6fc3 RS |
4667 | do_switch_frame (WINDOW_FRAME (XWINDOW (data->root_window)), |
4668 | Qnil, 0); | |
fd482be5 JB |
4669 | #endif |
4670 | ||
4671 | /* Set the screen height to the value it had before this function. */ | |
4672 | if (previous_frame_height != FRAME_HEIGHT (f) | |
4673 | || previous_frame_width != FRAME_WIDTH (f)) | |
4674 | change_frame_size (f, previous_frame_height, previous_frame_width, | |
2b653806 | 4675 | 0, 0, 0); |
e3678b64 | 4676 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
8f6ea2e9 | 4677 | if (previous_frame_menu_bar_lines != FRAME_MENU_BAR_LINES (f)) |
f8ad443a AS |
4678 | x_set_menu_bar_lines (f, make_number (previous_frame_menu_bar_lines), |
4679 | make_number (0)); | |
4314246f | 4680 | #ifdef HAVE_WINDOW_SYSTEM |
9ea173e8 GM |
4681 | if (previous_frame_tool_bar_lines != FRAME_TOOL_BAR_LINES (f)) |
4682 | x_set_tool_bar_lines (f, make_number (previous_frame_tool_bar_lines), | |
4683 | make_number (0)); | |
4314246f | 4684 | #endif |
217f2871 | 4685 | #endif |
d2b35234 | 4686 | |
5500c422 GM |
4687 | /* Now, free glyph matrices in windows that were not reused. */ |
4688 | for (i = 0; i < n_leaf_windows; ++i) | |
4689 | if (NILP (leaf_windows[i]->buffer)) | |
4690 | { | |
4691 | /* Assert it's not reused as a combination. */ | |
4692 | xassert (NILP (leaf_windows[i]->hchild) | |
4693 | && NILP (leaf_windows[i]->vchild)); | |
4694 | free_window_matrices (leaf_windows[i]); | |
4695 | SET_FRAME_GARBAGED (f); | |
4696 | } | |
4697 | ||
4698 | adjust_glyphs (f); | |
4699 | ||
d2b35234 | 4700 | UNBLOCK_INPUT; |
756b6edc | 4701 | |
478292ed RS |
4702 | /* Fselect_window will have made f the selected frame, so we |
4703 | reselect the proper frame here. Fhandle_switch_frame will change the | |
4704 | selected window too, but that doesn't make the call to | |
4705 | Fselect_window above totally superfluous; it still sets f's | |
4706 | selected window. */ | |
4707 | if (FRAME_LIVE_P (XFRAME (data->selected_frame))) | |
4708 | do_switch_frame (data->selected_frame, Qnil, 0); | |
4709 | ||
4710 | if (! NILP (Vwindow_configuration_change_hook) | |
4711 | && ! NILP (Vrun_hooks)) | |
4712 | call1 (Vrun_hooks, Qwindow_configuration_change_hook); | |
4713 | } | |
bdc727bf JB |
4714 | |
4715 | if (!NILP (new_current_buffer)) | |
d2b35234 RS |
4716 | { |
4717 | Fset_buffer (new_current_buffer); | |
4718 | ||
4719 | /* If the buffer that is current now is the same | |
4720 | that was current before setting the window configuration, | |
4721 | don't alter its PT. */ | |
4722 | if (old_point >= 0) | |
4723 | SET_PT (old_point); | |
4724 | } | |
bdc727bf | 4725 | |
478292ed RS |
4726 | /* Restore the minimum heights recorded in the configuration. */ |
4727 | window_min_height = XINT (data->min_height); | |
4728 | window_min_width = XINT (data->min_width); | |
543f5fb1 | 4729 | |
478292ed | 4730 | Vminibuf_scroll_window = data->minibuf_scroll_window; |
543f5fb1 | 4731 | |
3f8ab7bd | 4732 | return (FRAME_LIVE_P (f) ? Qt : Qnil); |
7ab12479 JB |
4733 | } |
4734 | ||
44fa5b1e | 4735 | /* Mark all windows now on frame as deleted |
7ab12479 JB |
4736 | by setting their buffers to nil. */ |
4737 | ||
fd482be5 | 4738 | void |
7ab12479 JB |
4739 | delete_all_subwindows (w) |
4740 | register struct window *w; | |
4741 | { | |
265a9e55 | 4742 | if (!NILP (w->next)) |
7ab12479 | 4743 | delete_all_subwindows (XWINDOW (w->next)); |
265a9e55 | 4744 | if (!NILP (w->vchild)) |
7ab12479 | 4745 | delete_all_subwindows (XWINDOW (w->vchild)); |
265a9e55 | 4746 | if (!NILP (w->hchild)) |
7ab12479 | 4747 | delete_all_subwindows (XWINDOW (w->hchild)); |
605be8af JB |
4748 | |
4749 | w->height = w->buffer; /* See Fset_window_configuration for excuse. */ | |
4750 | ||
86e48436 RS |
4751 | if (!NILP (w->buffer)) |
4752 | unshow_buffer (w); | |
4753 | ||
605be8af JB |
4754 | /* We set all three of these fields to nil, to make sure that we can |
4755 | distinguish this dead window from any live window. Live leaf | |
4756 | windows will have buffer set, and combination windows will have | |
4757 | vchild or hchild set. */ | |
4758 | w->buffer = Qnil; | |
4759 | w->vchild = Qnil; | |
4760 | w->hchild = Qnil; | |
acf70840 GM |
4761 | |
4762 | Vwindow_list = Qnil; | |
7ab12479 JB |
4763 | } |
4764 | \f | |
4765 | static int | |
4766 | count_windows (window) | |
4767 | register struct window *window; | |
4768 | { | |
4769 | register int count = 1; | |
265a9e55 | 4770 | if (!NILP (window->next)) |
7ab12479 | 4771 | count += count_windows (XWINDOW (window->next)); |
265a9e55 | 4772 | if (!NILP (window->vchild)) |
7ab12479 | 4773 | count += count_windows (XWINDOW (window->vchild)); |
265a9e55 | 4774 | if (!NILP (window->hchild)) |
7ab12479 JB |
4775 | count += count_windows (XWINDOW (window->hchild)); |
4776 | return count; | |
4777 | } | |
4778 | ||
5500c422 GM |
4779 | |
4780 | /* Fill vector FLAT with leaf windows under W, starting at index I. | |
4781 | Value is last index + 1. */ | |
4782 | ||
4783 | static int | |
4784 | get_leaf_windows (w, flat, i) | |
4785 | struct window *w; | |
4786 | struct window **flat; | |
4787 | int i; | |
4788 | { | |
4789 | while (w) | |
4790 | { | |
4791 | if (!NILP (w->hchild)) | |
4792 | i = get_leaf_windows (XWINDOW (w->hchild), flat, i); | |
4793 | else if (!NILP (w->vchild)) | |
4794 | i = get_leaf_windows (XWINDOW (w->vchild), flat, i); | |
4795 | else | |
4796 | flat[i++] = w; | |
4797 | ||
4798 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4799 | } | |
4800 | ||
4801 | return i; | |
4802 | } | |
4803 | ||
4804 | ||
4805 | /* Return a pointer to the glyph W's physical cursor is on. Value is | |
4806 | null if W's current matrix is invalid, so that no meaningfull glyph | |
4807 | can be returned. */ | |
4808 | ||
4809 | struct glyph * | |
4810 | get_phys_cursor_glyph (w) | |
4811 | struct window *w; | |
4812 | { | |
4813 | struct glyph_row *row; | |
4814 | struct glyph *glyph; | |
4815 | ||
4816 | if (w->phys_cursor.vpos >= 0 | |
4817 | && w->phys_cursor.vpos < w->current_matrix->nrows | |
4818 | && (row = MATRIX_ROW (w->current_matrix, w->phys_cursor.vpos), | |
4819 | row->enabled_p) | |
4820 | && row->used[TEXT_AREA] > w->phys_cursor.hpos) | |
4821 | glyph = row->glyphs[TEXT_AREA] + w->phys_cursor.hpos; | |
4822 | else | |
4823 | glyph = NULL; | |
4824 | ||
4825 | return glyph; | |
4826 | } | |
4827 | ||
4828 | ||
7ab12479 JB |
4829 | static int |
4830 | save_window_save (window, vector, i) | |
4831 | Lisp_Object window; | |
4832 | struct Lisp_Vector *vector; | |
4833 | int i; | |
4834 | { | |
4835 | register struct saved_window *p; | |
4836 | register struct window *w; | |
4837 | register Lisp_Object tem; | |
4838 | ||
265a9e55 | 4839 | for (;!NILP (window); window = w->next) |
7ab12479 JB |
4840 | { |
4841 | p = SAVED_WINDOW_N (vector, i); | |
4842 | w = XWINDOW (window); | |
4843 | ||
d834a2e9 | 4844 | XSETFASTINT (w->temslot, i++); |
7ab12479 JB |
4845 | p->window = window; |
4846 | p->buffer = w->buffer; | |
4847 | p->left = w->left; | |
4848 | p->top = w->top; | |
4849 | p->width = w->width; | |
4850 | p->height = w->height; | |
4851 | p->hscroll = w->hscroll; | |
4852 | p->display_table = w->display_table; | |
265a9e55 | 4853 | if (!NILP (w->buffer)) |
7ab12479 JB |
4854 | { |
4855 | /* Save w's value of point in the window configuration. | |
4856 | If w is the selected window, then get the value of point | |
4857 | from the buffer; pointm is garbage in the selected window. */ | |
4858 | if (EQ (window, selected_window)) | |
4859 | { | |
4860 | p->pointm = Fmake_marker (); | |
b73ea88e RS |
4861 | set_marker_both (p->pointm, w->buffer, |
4862 | BUF_PT (XBUFFER (w->buffer)), | |
4863 | BUF_PT_BYTE (XBUFFER (w->buffer))); | |
7ab12479 JB |
4864 | } |
4865 | else | |
eeb82665 | 4866 | p->pointm = Fcopy_marker (w->pointm, Qnil); |
7ab12479 | 4867 | |
eeb82665 | 4868 | p->start = Fcopy_marker (w->start, Qnil); |
7ab12479 JB |
4869 | p->start_at_line_beg = w->start_at_line_beg; |
4870 | ||
4871 | tem = XBUFFER (w->buffer)->mark; | |
eeb82665 | 4872 | p->mark = Fcopy_marker (tem, Qnil); |
7ab12479 JB |
4873 | } |
4874 | else | |
4875 | { | |
4876 | p->pointm = Qnil; | |
4877 | p->start = Qnil; | |
4878 | p->mark = Qnil; | |
4879 | p->start_at_line_beg = Qnil; | |
4880 | } | |
4881 | ||
265a9e55 | 4882 | if (NILP (w->parent)) |
7ab12479 JB |
4883 | p->parent = Qnil; |
4884 | else | |
4885 | p->parent = XWINDOW (w->parent)->temslot; | |
4886 | ||
265a9e55 | 4887 | if (NILP (w->prev)) |
7ab12479 JB |
4888 | p->prev = Qnil; |
4889 | else | |
4890 | p->prev = XWINDOW (w->prev)->temslot; | |
4891 | ||
265a9e55 | 4892 | if (!NILP (w->vchild)) |
7ab12479 | 4893 | i = save_window_save (w->vchild, vector, i); |
265a9e55 | 4894 | if (!NILP (w->hchild)) |
7ab12479 JB |
4895 | i = save_window_save (w->hchild, vector, i); |
4896 | } | |
4897 | ||
4898 | return i; | |
4899 | } | |
4900 | ||
a0d76c27 EN |
4901 | DEFUN ("current-window-configuration", Fcurrent_window_configuration, |
4902 | Scurrent_window_configuration, 0, 1, 0, | |
44fa5b1e JB |
4903 | "Return an object representing the current window configuration of FRAME.\n\ |
4904 | If FRAME is nil or omitted, use the selected frame.\n\ | |
7ab12479 JB |
4905 | This describes the number of windows, their sizes and current buffers,\n\ |
4906 | and for each displayed buffer, where display starts, and the positions of\n\ | |
4907 | point and mark. An exception is made for point in the current buffer:\n\ | |
bdc727bf JB |
4908 | its value is -not- saved.\n\ |
4909 | This also records the currently selected frame, and FRAME's focus\n\ | |
4910 | redirection (see `redirect-frame-focus').") | |
44fa5b1e JB |
4911 | (frame) |
4912 | Lisp_Object frame; | |
7ab12479 JB |
4913 | { |
4914 | register Lisp_Object tem; | |
4915 | register int n_windows; | |
4916 | register struct save_window_data *data; | |
da2792e0 | 4917 | register struct Lisp_Vector *vec; |
7ab12479 | 4918 | register int i; |
44fa5b1e | 4919 | FRAME_PTR f; |
43bad991 | 4920 | |
44fa5b1e | 4921 | if (NILP (frame)) |
1ae1a37d GM |
4922 | frame = selected_frame; |
4923 | CHECK_LIVE_FRAME (frame, 0); | |
4924 | f = XFRAME (frame); | |
7ab12479 | 4925 | |
44fa5b1e | 4926 | n_windows = count_windows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
da2792e0 KH |
4927 | vec = allocate_vectorlike (VECSIZE (struct save_window_data)); |
4928 | for (i = 0; i < VECSIZE (struct save_window_data); i++) | |
4929 | vec->contents[i] = Qnil; | |
4930 | vec->size = VECSIZE (struct save_window_data); | |
4931 | data = (struct save_window_data *)vec; | |
4932 | ||
d834a2e9 KH |
4933 | XSETFASTINT (data->frame_width, FRAME_WIDTH (f)); |
4934 | XSETFASTINT (data->frame_height, FRAME_HEIGHT (f)); | |
4935 | XSETFASTINT (data->frame_menu_bar_lines, FRAME_MENU_BAR_LINES (f)); | |
9ea173e8 | 4936 | XSETFASTINT (data->frame_tool_bar_lines, FRAME_TOOL_BAR_LINES (f)); |
1ae1a37d | 4937 | data->selected_frame = selected_frame; |
44fa5b1e | 4938 | data->current_window = FRAME_SELECTED_WINDOW (f); |
74112613 | 4939 | XSETBUFFER (data->current_buffer, current_buffer); |
7ab12479 | 4940 | data->minibuf_scroll_window = Vminibuf_scroll_window; |
44fa5b1e | 4941 | data->root_window = FRAME_ROOT_WINDOW (f); |
bdc727bf | 4942 | data->focus_frame = FRAME_FOCUS_FRAME (f); |
74112613 KH |
4943 | XSETINT (data->min_height, window_min_height); |
4944 | XSETINT (data->min_width, window_min_width); | |
7ab12479 JB |
4945 | tem = Fmake_vector (make_number (n_windows), Qnil); |
4946 | data->saved_windows = tem; | |
4947 | for (i = 0; i < n_windows; i++) | |
4948 | XVECTOR (tem)->contents[i] | |
4949 | = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE), Qnil); | |
44fa5b1e | 4950 | save_window_save (FRAME_ROOT_WINDOW (f), |
7ab12479 | 4951 | XVECTOR (tem), 0); |
74112613 | 4952 | XSETWINDOW_CONFIGURATION (tem, data); |
7ab12479 JB |
4953 | return (tem); |
4954 | } | |
4955 | ||
4956 | DEFUN ("save-window-excursion", Fsave_window_excursion, Ssave_window_excursion, | |
4957 | 0, UNEVALLED, 0, | |
4958 | "Execute body, preserving window sizes and contents.\n\ | |
eb16ec06 RS |
4959 | Restore which buffer appears in which window, where display starts,\n\ |
4960 | and the value of point and mark for each window.\n\ | |
8ed92cf0 | 4961 | Also restore the choice of selected window.\n\ |
eb16ec06 | 4962 | Also restore which buffer is current.\n\ |
7ab12479 JB |
4963 | Does not restore the value of point in current buffer.") |
4964 | (args) | |
4965 | Lisp_Object args; | |
4966 | { | |
4967 | register Lisp_Object val; | |
4968 | register int count = specpdl_ptr - specpdl; | |
4969 | ||
4970 | record_unwind_protect (Fset_window_configuration, | |
43bad991 | 4971 | Fcurrent_window_configuration (Qnil)); |
7ab12479 JB |
4972 | val = Fprogn (args); |
4973 | return unbind_to (count, val); | |
4974 | } | |
5500c422 GM |
4975 | |
4976 | \f | |
4977 | /*********************************************************************** | |
4978 | Marginal Areas | |
4979 | ***********************************************************************/ | |
4980 | ||
4981 | DEFUN ("set-window-margins", Fset_window_margins, Sset_window_margins, | |
a7bdfc08 | 4982 | 2, 3, 0, |
5500c422 | 4983 | "Set width of marginal areas of window WINDOW.\n\ |
a7bdfc08 | 4984 | If window is nil, set margins of the currently selected window.\n\ |
5500c422 GM |
4985 | First parameter LEFT-WIDTH specifies the number of character\n\ |
4986 | cells to reserve for the left marginal area. Second parameter\n\ | |
4987 | RIGHT-WIDTH does the same for the right marginal area.\n\ | |
4988 | A nil width parameter means no margin.") | |
cfa22082 | 4989 | (window, left, right) |
5500c422 GM |
4990 | Lisp_Object window, left, right; |
4991 | { | |
4992 | struct window *w = decode_window (window); | |
5500c422 GM |
4993 | |
4994 | if (!NILP (left)) | |
cfa22082 | 4995 | CHECK_NUMBER_OR_FLOAT (left, 1); |
5500c422 | 4996 | if (!NILP (right)) |
cfa22082 | 4997 | CHECK_NUMBER_OR_FLOAT (right, 2); |
5500c422 GM |
4998 | |
4999 | /* Check widths < 0 and translate a zero width to nil. | |
5000 | Margins that are too wide have to be checked elsewhere. */ | |
5001 | if ((INTEGERP (left) && XINT (left) < 0) | |
7539e11f | 5002 | || (FLOATP (left) && XFLOAT_DATA (left) <= 0)) |
5500c422 GM |
5003 | XSETFASTINT (left, 0); |
5004 | if (INTEGERP (left) && XFASTINT (left) == 0) | |
5005 | left = Qnil; | |
5006 | ||
5007 | if ((INTEGERP (right) && XINT (right) < 0) | |
7539e11f | 5008 | || (FLOATP (right) && XFLOAT_DATA (right) <= 0)) |
5500c422 GM |
5009 | XSETFASTINT (right, 0); |
5010 | if (INTEGERP (right) && XFASTINT (right) == 0) | |
5011 | right = Qnil; | |
5012 | ||
5013 | w->left_margin_width = left; | |
5014 | w->right_margin_width = right; | |
5015 | ||
5016 | ++windows_or_buffers_changed; | |
5017 | adjust_glyphs (XFRAME (WINDOW_FRAME (w))); | |
5018 | return Qnil; | |
5019 | } | |
5020 | ||
5021 | ||
5022 | DEFUN ("window-margins", Fwindow_margins, Swindow_margins, | |
5023 | 0, 1, 0, | |
5024 | "Get width of marginal areas of window WINDOW.\n\ | |
5025 | If WINDOW is omitted or nil, use the currently selected window.\n\ | |
5026 | Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\ | |
5027 | If a marginal area does not exist, its width will be returned\n\ | |
5028 | as nil.") | |
5029 | (window) | |
5030 | Lisp_Object window; | |
5031 | { | |
5032 | struct window *w = decode_window (window); | |
5033 | return Fcons (w->left_margin_width, w->right_margin_width); | |
5034 | } | |
5035 | ||
5036 | ||
7ab12479 | 5037 | \f |
5500c422 GM |
5038 | /*********************************************************************** |
5039 | Smooth scrolling | |
5040 | ***********************************************************************/ | |
5041 | ||
5042 | DEFUN ("window-vscroll", Fwindow_vscroll, Swindow_vscroll, 0, 1, 0, | |
5043 | "Return the amount by which WINDOW is scrolled vertically.\n\ | |
5044 | Use the selected window if WINDOW is nil or omitted.\n\ | |
5045 | Value is a multiple of the canonical character height of WINDOW.") | |
5046 | (window) | |
5047 | Lisp_Object window; | |
5048 | { | |
47004952 | 5049 | Lisp_Object result; |
5500c422 GM |
5050 | struct frame *f; |
5051 | struct window *w; | |
5052 | ||
5053 | if (NILP (window)) | |
5054 | window = selected_window; | |
47004952 GM |
5055 | else |
5056 | CHECK_WINDOW (window, 0); | |
5500c422 GM |
5057 | w = XWINDOW (window); |
5058 | f = XFRAME (w->frame); | |
5059 | ||
5060 | if (FRAME_WINDOW_P (f)) | |
47004952 | 5061 | result = CANON_Y_FROM_PIXEL_Y (f, -w->vscroll); |
5500c422 | 5062 | else |
47004952 GM |
5063 | result = make_number (0); |
5064 | return result; | |
5500c422 GM |
5065 | } |
5066 | ||
5067 | ||
5068 | DEFUN ("set-window-vscroll", Fset_window_vscroll, Sset_window_vscroll, | |
47004952 GM |
5069 | 2, 2, 0, |
5070 | "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\ | |
5500c422 | 5071 | WINDOW nil or omitted means use the selected window. VSCROLL is a\n\ |
47004952 GM |
5072 | non-negative multiple of the canonical character height of WINDOW.") |
5073 | (window, vscroll) | |
5074 | Lisp_Object window, vscroll; | |
5500c422 GM |
5075 | { |
5076 | struct window *w; | |
5077 | struct frame *f; | |
5078 | ||
5500c422 GM |
5079 | if (NILP (window)) |
5080 | window = selected_window; | |
47004952 GM |
5081 | else |
5082 | CHECK_WINDOW (window, 0); | |
5083 | CHECK_NUMBER_OR_FLOAT (vscroll, 1); | |
5084 | ||
5500c422 GM |
5085 | w = XWINDOW (window); |
5086 | f = XFRAME (w->frame); | |
5087 | ||
5088 | if (FRAME_WINDOW_P (f)) | |
5089 | { | |
5090 | int old_dy = w->vscroll; | |
47004952 GM |
5091 | |
5092 | w->vscroll = - CANON_Y_UNIT (f) * XFLOATINT (vscroll); | |
5093 | w->vscroll = min (w->vscroll, 0); | |
5500c422 GM |
5094 | |
5095 | /* Adjust glyph matrix of the frame if the virtual display | |
5096 | area becomes larger than before. */ | |
5097 | if (w->vscroll < 0 && w->vscroll < old_dy) | |
5098 | adjust_glyphs (f); | |
5099 | ||
5100 | /* Prevent redisplay shortcuts. */ | |
b1599b4c | 5101 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
5500c422 GM |
5102 | } |
5103 | ||
47004952 | 5104 | return Fwindow_vscroll (window); |
5500c422 GM |
5105 | } |
5106 | ||
7bbb5782 GM |
5107 | \f |
5108 | /* Call FN for all leaf windows on frame F. FN is called with the | |
5109 | first argument being a pointer to the leaf window, and with | |
f95464e4 | 5110 | additional argument USER_DATA. Stops when FN returns 0. */ |
7bbb5782 GM |
5111 | |
5112 | void | |
f95464e4 | 5113 | foreach_window (f, fn, user_data) |
7bbb5782 | 5114 | struct frame *f; |
f95464e4 GM |
5115 | int (* fn) P_ ((struct window *, void *)); |
5116 | void *user_data; | |
7bbb5782 | 5117 | { |
f95464e4 | 5118 | foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f)), fn, user_data); |
7bbb5782 GM |
5119 | } |
5120 | ||
5121 | ||
5122 | /* Helper function for foreach_window. Call FN for all leaf windows | |
5123 | reachable from W. FN is called with the first argument being a | |
f95464e4 | 5124 | pointer to the leaf window, and with additional argument USER_DATA. |
67492200 | 5125 | Stop when FN returns 0. Value is 0 if stopped by FN. */ |
7bbb5782 | 5126 | |
67492200 | 5127 | static int |
f95464e4 | 5128 | foreach_window_1 (w, fn, user_data) |
7bbb5782 | 5129 | struct window *w; |
f95464e4 GM |
5130 | int (* fn) P_ ((struct window *, void *)); |
5131 | void *user_data; | |
7bbb5782 | 5132 | { |
67492200 GM |
5133 | int cont; |
5134 | ||
5135 | for (cont = 1; w && cont;) | |
7bbb5782 GM |
5136 | { |
5137 | if (!NILP (w->hchild)) | |
f95464e4 | 5138 | cont = foreach_window_1 (XWINDOW (w->hchild), fn, user_data); |
7bbb5782 | 5139 | else if (!NILP (w->vchild)) |
f95464e4 | 5140 | cont = foreach_window_1 (XWINDOW (w->vchild), fn, user_data); |
0f532a9a GM |
5141 | else |
5142 | cont = fn (w, user_data); | |
7bbb5782 GM |
5143 | |
5144 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
5145 | } | |
67492200 GM |
5146 | |
5147 | return cont; | |
7bbb5782 GM |
5148 | } |
5149 | ||
5150 | ||
5151 | /* Freeze or unfreeze the window start of W if unless it is a | |
f95464e4 | 5152 | mini-window or the selected window. FREEZE_P non-null means freeze |
7bbb5782 GM |
5153 | the window start. */ |
5154 | ||
67492200 | 5155 | static int |
7bbb5782 GM |
5156 | freeze_window_start (w, freeze_p) |
5157 | struct window *w; | |
f95464e4 | 5158 | void *freeze_p; |
7bbb5782 GM |
5159 | { |
5160 | if (w == XWINDOW (selected_window) | |
5161 | || MINI_WINDOW_P (w) | |
5162 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
24d744ac | 5163 | && ! NILP (Vminibuf_scroll_window) |
7bbb5782 | 5164 | && w == XWINDOW (Vminibuf_scroll_window))) |
f95464e4 | 5165 | freeze_p = NULL; |
7bbb5782 | 5166 | |
f95464e4 | 5167 | w->frozen_window_start_p = freeze_p != NULL; |
67492200 | 5168 | return 1; |
7bbb5782 GM |
5169 | } |
5170 | ||
5171 | ||
5172 | /* Freeze or unfreeze the window starts of all leaf windows on frame | |
5173 | F, except the selected window and a mini-window. FREEZE_P non-zero | |
5174 | means freeze the window start. */ | |
5175 | ||
5176 | void | |
5177 | freeze_window_starts (f, freeze_p) | |
5178 | struct frame *f; | |
5179 | int freeze_p; | |
5180 | { | |
cbccabec | 5181 | foreach_window (f, freeze_window_start, (void *) (freeze_p ? f : 0)); |
7bbb5782 | 5182 | } |
5500c422 GM |
5183 | |
5184 | \f | |
5185 | /*********************************************************************** | |
5186 | Initialization | |
5187 | ***********************************************************************/ | |
5188 | ||
cbff28e8 RS |
5189 | /* Return 1 if window configurations C1 and C2 |
5190 | describe the same state of affairs. This is used by Fequal. */ | |
5191 | ||
5192 | int | |
2f8274be | 5193 | compare_window_configurations (c1, c2, ignore_positions) |
cbff28e8 | 5194 | Lisp_Object c1, c2; |
2f8274be | 5195 | int ignore_positions; |
cbff28e8 RS |
5196 | { |
5197 | register struct save_window_data *d1, *d2; | |
5198 | struct Lisp_Vector *sw1, *sw2; | |
5199 | int i; | |
5200 | ||
4d3edcb4 GM |
5201 | if (!WINDOW_CONFIGURATIONP (c1)) |
5202 | wrong_type_argument (Qwindow_configuration_p, c1); | |
5203 | if (!WINDOW_CONFIGURATIONP (c2)) | |
5204 | wrong_type_argument (Qwindow_configuration_p, c2); | |
5205 | ||
cbff28e8 RS |
5206 | d1 = (struct save_window_data *) XVECTOR (c1); |
5207 | d2 = (struct save_window_data *) XVECTOR (c2); | |
5208 | sw1 = XVECTOR (d1->saved_windows); | |
5209 | sw2 = XVECTOR (d2->saved_windows); | |
5210 | ||
5211 | if (! EQ (d1->frame_width, d2->frame_width)) | |
5212 | return 0; | |
5213 | if (! EQ (d1->frame_height, d2->frame_height)) | |
5214 | return 0; | |
5215 | if (! EQ (d1->frame_menu_bar_lines, d2->frame_menu_bar_lines)) | |
5216 | return 0; | |
5217 | if (! EQ (d1->selected_frame, d2->selected_frame)) | |
5218 | return 0; | |
5219 | /* Don't compare the current_window field directly. | |
5220 | Instead see w1_is_current and w2_is_current, below. */ | |
5221 | if (! EQ (d1->current_buffer, d2->current_buffer)) | |
5222 | return 0; | |
2f8274be RS |
5223 | if (! ignore_positions) |
5224 | if (! EQ (d1->minibuf_scroll_window, d2->minibuf_scroll_window)) | |
5225 | return 0; | |
cbff28e8 RS |
5226 | /* Don't compare the root_window field. |
5227 | We don't require the two configurations | |
5228 | to use the same window object, | |
5229 | and the two root windows must be equivalent | |
5230 | if everything else compares equal. */ | |
5231 | if (! EQ (d1->focus_frame, d2->focus_frame)) | |
5232 | return 0; | |
5233 | if (! EQ (d1->min_width, d2->min_width)) | |
5234 | return 0; | |
5235 | if (! EQ (d1->min_height, d2->min_height)) | |
5236 | return 0; | |
5237 | ||
5238 | /* Verify that the two confis have the same number of windows. */ | |
5239 | if (sw1->size != sw2->size) | |
5240 | return 0; | |
5241 | ||
5242 | for (i = 0; i < sw1->size; i++) | |
5243 | { | |
5244 | struct saved_window *p1, *p2; | |
5245 | int w1_is_current, w2_is_current; | |
5246 | ||
5247 | p1 = SAVED_WINDOW_N (sw1, i); | |
5248 | p2 = SAVED_WINDOW_N (sw2, i); | |
5249 | ||
5250 | /* Verify that the current windows in the two | |
5251 | configurations correspond to each other. */ | |
5252 | w1_is_current = EQ (d1->current_window, p1->window); | |
5253 | w2_is_current = EQ (d2->current_window, p2->window); | |
5254 | ||
5255 | if (w1_is_current != w2_is_current) | |
5256 | return 0; | |
5257 | ||
5258 | /* Verify that the corresponding windows do match. */ | |
5259 | if (! EQ (p1->buffer, p2->buffer)) | |
5260 | return 0; | |
5261 | if (! EQ (p1->left, p2->left)) | |
5262 | return 0; | |
5263 | if (! EQ (p1->top, p2->top)) | |
5264 | return 0; | |
5265 | if (! EQ (p1->width, p2->width)) | |
5266 | return 0; | |
5267 | if (! EQ (p1->height, p2->height)) | |
5268 | return 0; | |
cbff28e8 RS |
5269 | if (! EQ (p1->display_table, p2->display_table)) |
5270 | return 0; | |
5271 | if (! EQ (p1->parent, p2->parent)) | |
5272 | return 0; | |
5273 | if (! EQ (p1->prev, p2->prev)) | |
5274 | return 0; | |
2f8274be RS |
5275 | if (! ignore_positions) |
5276 | { | |
5277 | if (! EQ (p1->hscroll, p2->hscroll)) | |
5278 | return 0; | |
5279 | if (! EQ (p1->start_at_line_beg, p2->start_at_line_beg)) | |
5280 | return 0; | |
5281 | if (NILP (Fequal (p1->start, p2->start))) | |
5282 | return 0; | |
5283 | if (NILP (Fequal (p1->pointm, p2->pointm))) | |
5284 | return 0; | |
5285 | if (NILP (Fequal (p1->mark, p2->mark))) | |
5286 | return 0; | |
5287 | } | |
cbff28e8 RS |
5288 | } |
5289 | ||
5290 | return 1; | |
5291 | } | |
2f8274be RS |
5292 | |
5293 | DEFUN ("compare-window-configurations", Fcompare_window_configurations, | |
5294 | Scompare_window_configurations, 2, 2, 0, | |
5295 | "Compare two window configurations as regards the structure of windows.\n\ | |
5296 | This function ignores details such as the values of point and mark\n\ | |
5297 | and scrolling positions.") | |
5298 | (x, y) | |
5299 | Lisp_Object x, y; | |
5300 | { | |
5301 | if (compare_window_configurations (x, y, 1)) | |
5302 | return Qt; | |
5303 | return Qnil; | |
5304 | } | |
cbff28e8 | 5305 | \f |
dfcf069d | 5306 | void |
7ab12479 JB |
5307 | init_window_once () |
5308 | { | |
1ae1a37d GM |
5309 | struct frame *f = make_terminal_frame (); |
5310 | XSETFRAME (selected_frame, f); | |
5311 | Vterminal_frame = selected_frame; | |
5312 | minibuf_window = f->minibuffer_window; | |
5313 | selected_window = f->selected_window; | |
5314 | last_nonminibuf_frame = f; | |
5b03d3c0 RS |
5315 | |
5316 | window_initialized = 1; | |
7ab12479 JB |
5317 | } |
5318 | ||
67492200 GM |
5319 | void |
5320 | init_window () | |
5321 | { | |
5322 | Vwindow_list = Qnil; | |
5323 | } | |
5324 | ||
dfcf069d | 5325 | void |
7ab12479 JB |
5326 | syms_of_window () |
5327 | { | |
fbad6f9a GM |
5328 | Qleft_bitmap_area = intern ("left-bitmap-area"); |
5329 | staticpro (&Qleft_bitmap_area); | |
5330 | Qright_bitmap_area = intern ("right-bitmap-area"); | |
5331 | staticpro (&Qright_bitmap_area); | |
5332 | ||
8a37516b GM |
5333 | Qwindow_size_fixed = intern ("window-size-fixed"); |
5334 | staticpro (&Qwindow_size_fixed); | |
233a4a2c | 5335 | |
543f5fb1 RS |
5336 | staticpro (&Qwindow_configuration_change_hook); |
5337 | Qwindow_configuration_change_hook | |
5338 | = intern ("window-configuration-change-hook"); | |
5339 | ||
7ab12479 JB |
5340 | Qwindowp = intern ("windowp"); |
5341 | staticpro (&Qwindowp); | |
5342 | ||
3f8ab7bd RS |
5343 | Qwindow_configuration_p = intern ("window-configuration-p"); |
5344 | staticpro (&Qwindow_configuration_p); | |
5345 | ||
806b4d9b JB |
5346 | Qwindow_live_p = intern ("window-live-p"); |
5347 | staticpro (&Qwindow_live_p); | |
605be8af | 5348 | |
2cccc823 | 5349 | Qtemp_buffer_show_hook = intern ("temp-buffer-show-hook"); |
a58ec57d RS |
5350 | staticpro (&Qtemp_buffer_show_hook); |
5351 | ||
67492200 GM |
5352 | staticpro (&Vwindow_list); |
5353 | ||
7ab12479 JB |
5354 | DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function, |
5355 | "Non-nil means call as function to display a help buffer.\n\ | |
c3ef6b1d | 5356 | The function is called with one argument, the buffer to be displayed.\n\ |
f52cca03 RS |
5357 | Used by `with-output-to-temp-buffer'.\n\ |
5358 | If this function is used, then it must do the entire job of showing\n\ | |
5359 | the buffer; `temp-buffer-show-hook' is not run unless this function runs it."); | |
7ab12479 JB |
5360 | Vtemp_buffer_show_function = Qnil; |
5361 | ||
5362 | DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function, | |
5363 | "If non-nil, function to call to handle `display-buffer'.\n\ | |
5364 | It will receive two args, the buffer and a flag which if non-nil means\n\ | |
5365 | that the currently selected window is not acceptable.\n\ | |
5366 | Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\ | |
5367 | work using this function."); | |
5368 | Vdisplay_buffer_function = Qnil; | |
5369 | ||
7ab12479 JB |
5370 | DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window, |
5371 | "Non-nil means it is the window that C-M-v in minibuffer should scroll."); | |
5372 | Vminibuf_scroll_window = Qnil; | |
5373 | ||
5374 | DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer, | |
5375 | "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window."); | |
5376 | Vother_window_scroll_buffer = Qnil; | |
5377 | ||
44fa5b1e | 5378 | DEFVAR_BOOL ("pop-up-frames", &pop_up_frames, |
700f75a4 | 5379 | "*Non-nil means `display-buffer' should make a separate frame."); |
44fa5b1e | 5380 | pop_up_frames = 0; |
7ab12479 | 5381 | |
9c3da604 | 5382 | DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames, |
5372262f | 5383 | "*Non-nil means `display-buffer' should reuse frames.\n\ |
9c3da604 GM |
5384 | If the buffer in question is already displayed in a frame, raise that frame."); |
5385 | display_buffer_reuse_frames = 0; | |
5386 | ||
44fa5b1e | 5387 | DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function, |
a90712c2 | 5388 | "Function to call to handle automatic new frame creation.\n\ |
44fa5b1e | 5389 | It is called with no arguments and should return a newly created frame.\n\ |
7ab12479 | 5390 | \n\ |
44fa5b1e JB |
5391 | A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\ |
5392 | where `pop-up-frame-alist' would hold the default frame parameters."); | |
5393 | Vpop_up_frame_function = Qnil; | |
7ab12479 | 5394 | |
a90712c2 RS |
5395 | DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names, |
5396 | "*List of buffer names that should have their own special frames.\n\ | |
5397 | Displaying a buffer whose name is in this list makes a special frame for it\n\ | |
524580a4 | 5398 | using `special-display-function'. See also `special-display-regexps'.\n\ |
3548e138 | 5399 | \n\ |
524580a4 RS |
5400 | An element of the list can be a list instead of just a string.\n\ |
5401 | There are two ways to use a list as an element:\n\ | |
5402 | (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\ | |
5403 | In the first case, FRAME-PARAMETERS are used to create the frame.\n\ | |
5404 | In the latter case, FUNCTION is called with BUFFER as the first argument,\n\ | |
5405 | followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\ | |
4caa7448 RS |
5406 | All this is done by the function found in `special-display-function'.\n\ |
5407 | \n\ | |
5408 | If this variable appears \"not to work\", because you add a name to it\n\ | |
5409 | but that buffer still appears in the selected window, look at the\n\ | |
5410 | values of `same-window-buffer-names' and `same-window-regexps'.\n\ | |
5411 | Those variables take precedence over this one."); | |
a90712c2 RS |
5412 | Vspecial_display_buffer_names = Qnil; |
5413 | ||
5414 | DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps, | |
5415 | "*List of regexps saying which buffers should have their own special frames.\n\ | |
5416 | If a buffer name matches one of these regexps, it gets its own frame.\n\ | |
5417 | Displaying a buffer whose name is in this list makes a special frame for it\n\ | |
0a952b57 | 5418 | using `special-display-function'.\n\ |
3548e138 | 5419 | \n\ |
524580a4 RS |
5420 | An element of the list can be a list instead of just a string.\n\ |
5421 | There are two ways to use a list as an element:\n\ | |
5422 | (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\ | |
5423 | In the first case, FRAME-PARAMETERS are used to create the frame.\n\ | |
5424 | In the latter case, FUNCTION is called with the buffer as first argument,\n\ | |
5425 | followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\ | |
4caa7448 RS |
5426 | All this is done by the function found in `special-display-function'.\n\ |
5427 | \n\ | |
5428 | If this variable appears \"not to work\", because you add a regexp to it\n\ | |
5429 | but the matching buffers still appear in the selected window, look at the\n\ | |
5430 | values of `same-window-buffer-names' and `same-window-regexps'.\n\ | |
5431 | Those variables take precedence over this one."); | |
a90712c2 RS |
5432 | Vspecial_display_regexps = Qnil; |
5433 | ||
5434 | DEFVAR_LISP ("special-display-function", &Vspecial_display_function, | |
5435 | "Function to call to make a new frame for a special buffer.\n\ | |
0a952b57 RS |
5436 | It is called with two arguments, the buffer and optional buffer specific\n\ |
5437 | data, and should return a window displaying that buffer.\n\ | |
a90712c2 | 5438 | The default value makes a separate frame for the buffer,\n\ |
bdd3a802 | 5439 | using `special-display-frame-alist' to specify the frame parameters.\n\ |
a90712c2 RS |
5440 | \n\ |
5441 | A buffer is special if its is listed in `special-display-buffer-names'\n\ | |
5442 | or matches a regexp in `special-display-regexps'."); | |
5443 | Vspecial_display_function = Qnil; | |
5444 | ||
855d8627 RS |
5445 | DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names, |
5446 | "*List of buffer names that should appear in the selected window.\n\ | |
5447 | Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\ | |
5448 | switches to it in the selected window, rather than making it appear\n\ | |
2e5ce1a0 | 5449 | in some other window.\n\ |
855d8627 RS |
5450 | \n\ |
5451 | An element of the list can be a cons cell instead of just a string.\n\ | |
5452 | Then the car must be a string, which specifies the buffer name.\n\ | |
5453 | This is for compatibility with `special-display-buffer-names';\n\ | |
5454 | the cdr of the cons cell is ignored.\n\ | |
5455 | \n\ | |
5456 | See also `same-window-regexps'."); | |
5457 | Vsame_window_buffer_names = Qnil; | |
5458 | ||
5459 | DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps, | |
5460 | "*List of regexps saying which buffers should appear in the selected window.\n\ | |
5461 | If a buffer name matches one of these regexps, then displaying it\n\ | |
5462 | using `display-buffer' or `pop-to-buffer' switches to it\n\ | |
5463 | in the selected window, rather than making it appear in some other window.\n\ | |
5464 | \n\ | |
5465 | An element of the list can be a cons cell instead of just a string.\n\ | |
5466 | Then the car must be a string, which specifies the buffer name.\n\ | |
5467 | This is for compatibility with `special-display-buffer-names';\n\ | |
5468 | the cdr of the cons cell is ignored.\n\ | |
5469 | \n\ | |
5470 | See also `same-window-buffer-names'."); | |
5471 | Vsame_window_regexps = Qnil; | |
5472 | ||
7ab12479 JB |
5473 | DEFVAR_BOOL ("pop-up-windows", &pop_up_windows, |
5474 | "*Non-nil means display-buffer should make new windows."); | |
5475 | pop_up_windows = 1; | |
5476 | ||
5477 | DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines, | |
5478 | "*Number of lines of continuity when scrolling by screenfuls."); | |
5479 | next_screen_context_lines = 2; | |
5480 | ||
5481 | DEFVAR_INT ("split-height-threshold", &split_height_threshold, | |
5482 | "*display-buffer would prefer to split the largest window if this large.\n\ | |
5483 | If there is only one window, it is split regardless of this value."); | |
5484 | split_height_threshold = 500; | |
5485 | ||
5486 | DEFVAR_INT ("window-min-height", &window_min_height, | |
5487 | "*Delete any window less than this tall (including its mode line)."); | |
5488 | window_min_height = 4; | |
5489 | ||
5490 | DEFVAR_INT ("window-min-width", &window_min_width, | |
5491 | "*Delete any window less than this wide."); | |
5492 | window_min_width = 10; | |
5493 | ||
5500c422 GM |
5494 | DEFVAR_LISP ("scroll-preserve-screen-position", |
5495 | &Vscroll_preserve_screen_position, | |
9317a85d | 5496 | "*Nonzero means scroll commands move point to keep its screen line unchanged."); |
5500c422 | 5497 | Vscroll_preserve_screen_position = Qnil; |
9317a85d | 5498 | |
543f5fb1 RS |
5499 | DEFVAR_LISP ("window-configuration-change-hook", |
5500 | &Vwindow_configuration_change_hook, | |
5501 | "Functions to call when window configuration changes.\n\ | |
e3e041eb | 5502 | The selected frame is the one whose configuration has changed."); |
543f5fb1 RS |
5503 | Vwindow_configuration_change_hook = Qnil; |
5504 | ||
7ab12479 JB |
5505 | defsubr (&Sselected_window); |
5506 | defsubr (&Sminibuffer_window); | |
5507 | defsubr (&Swindow_minibuffer_p); | |
5508 | defsubr (&Swindowp); | |
806b4d9b | 5509 | defsubr (&Swindow_live_p); |
7ab12479 JB |
5510 | defsubr (&Spos_visible_in_window_p); |
5511 | defsubr (&Swindow_buffer); | |
5512 | defsubr (&Swindow_height); | |
5513 | defsubr (&Swindow_width); | |
5514 | defsubr (&Swindow_hscroll); | |
5515 | defsubr (&Sset_window_hscroll); | |
190eb263 RS |
5516 | defsubr (&Swindow_redisplay_end_trigger); |
5517 | defsubr (&Sset_window_redisplay_end_trigger); | |
7ab12479 | 5518 | defsubr (&Swindow_edges); |
d5783c40 JB |
5519 | defsubr (&Scoordinates_in_window_p); |
5520 | defsubr (&Swindow_at); | |
7ab12479 JB |
5521 | defsubr (&Swindow_point); |
5522 | defsubr (&Swindow_start); | |
5523 | defsubr (&Swindow_end); | |
5524 | defsubr (&Sset_window_point); | |
5525 | defsubr (&Sset_window_start); | |
5526 | defsubr (&Swindow_dedicated_p); | |
d207b766 | 5527 | defsubr (&Sset_window_dedicated_p); |
7ab12479 JB |
5528 | defsubr (&Swindow_display_table); |
5529 | defsubr (&Sset_window_display_table); | |
5530 | defsubr (&Snext_window); | |
5531 | defsubr (&Sprevious_window); | |
5532 | defsubr (&Sother_window); | |
5533 | defsubr (&Sget_lru_window); | |
5534 | defsubr (&Sget_largest_window); | |
5535 | defsubr (&Sget_buffer_window); | |
5536 | defsubr (&Sdelete_other_windows); | |
5537 | defsubr (&Sdelete_windows_on); | |
5538 | defsubr (&Sreplace_buffer_in_windows); | |
5539 | defsubr (&Sdelete_window); | |
5540 | defsubr (&Sset_window_buffer); | |
5541 | defsubr (&Sselect_window); | |
4628f7a4 EN |
5542 | defsubr (&Sspecial_display_p); |
5543 | defsubr (&Ssame_window_p); | |
7ab12479 JB |
5544 | defsubr (&Sdisplay_buffer); |
5545 | defsubr (&Ssplit_window); | |
5546 | defsubr (&Senlarge_window); | |
5547 | defsubr (&Sshrink_window); | |
5548 | defsubr (&Sscroll_up); | |
5549 | defsubr (&Sscroll_down); | |
5550 | defsubr (&Sscroll_left); | |
5551 | defsubr (&Sscroll_right); | |
ccd0664b | 5552 | defsubr (&Sother_window_for_scrolling); |
7ab12479 JB |
5553 | defsubr (&Sscroll_other_window); |
5554 | defsubr (&Srecenter); | |
5555 | defsubr (&Smove_to_window_line); | |
5556 | defsubr (&Swindow_configuration_p); | |
3f8ab7bd | 5557 | defsubr (&Swindow_configuration_frame); |
7ab12479 JB |
5558 | defsubr (&Sset_window_configuration); |
5559 | defsubr (&Scurrent_window_configuration); | |
5560 | defsubr (&Ssave_window_excursion); | |
5500c422 GM |
5561 | defsubr (&Sset_window_margins); |
5562 | defsubr (&Swindow_margins); | |
5563 | defsubr (&Swindow_vscroll); | |
5564 | defsubr (&Sset_window_vscroll); | |
2f8274be | 5565 | defsubr (&Scompare_window_configurations); |
67492200 | 5566 | defsubr (&Swindow_list); |
7ab12479 JB |
5567 | } |
5568 | ||
dfcf069d | 5569 | void |
7ab12479 JB |
5570 | keys_of_window () |
5571 | { | |
5572 | initial_define_key (control_x_map, '1', "delete-other-windows"); | |
5573 | initial_define_key (control_x_map, '2', "split-window"); | |
5574 | initial_define_key (control_x_map, '0', "delete-window"); | |
5575 | initial_define_key (control_x_map, 'o', "other-window"); | |
5576 | initial_define_key (control_x_map, '^', "enlarge-window"); | |
5577 | initial_define_key (control_x_map, '<', "scroll-left"); | |
5578 | initial_define_key (control_x_map, '>', "scroll-right"); | |
5579 | ||
5580 | initial_define_key (global_map, Ctl ('V'), "scroll-up"); | |
5581 | initial_define_key (meta_map, Ctl ('V'), "scroll-other-window"); | |
5582 | initial_define_key (meta_map, 'v', "scroll-down"); | |
5583 | ||
5584 | initial_define_key (global_map, Ctl('L'), "recenter"); | |
5585 | initial_define_key (meta_map, 'r', "move-to-window-line"); | |
5586 | } |