| 1 | /* Window creation, deletion and examination for GNU Emacs. |
| 2 | Does not include redisplay. |
| 3 | Copyright (C) 1985, 86, 87, 93, 94, 95, 96 Free Software Foundation, Inc. |
| 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 |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 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 |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include <config.h> |
| 23 | #include "lisp.h" |
| 24 | #include "buffer.h" |
| 25 | #include "frame.h" |
| 26 | #include "window.h" |
| 27 | #include "commands.h" |
| 28 | #include "indent.h" |
| 29 | #include "termchar.h" |
| 30 | #include "disptab.h" |
| 31 | #include "keyboard.h" |
| 32 | |
| 33 | Lisp_Object Qwindowp, Qwindow_live_p; |
| 34 | |
| 35 | Lisp_Object Fnext_window (), Fdelete_window (), Fselect_window (); |
| 36 | Lisp_Object Fset_window_buffer (), Fsplit_window (), Frecenter (); |
| 37 | |
| 38 | void delete_all_subwindows (); |
| 39 | static struct window *decode_window(); |
| 40 | |
| 41 | /* This is the window in which the terminal's cursor should |
| 42 | be left when nothing is being done with it. This must |
| 43 | always be a leaf window, and its buffer is selected by |
| 44 | the top level editing loop at the end of each command. |
| 45 | |
| 46 | This value is always the same as |
| 47 | FRAME_SELECTED_WINDOW (selected_frame). */ |
| 48 | |
| 49 | Lisp_Object selected_window; |
| 50 | |
| 51 | /* The minibuffer window of the selected frame. |
| 52 | Note that you cannot test for minibufferness of an arbitrary window |
| 53 | by comparing against this; but you can test for minibufferness of |
| 54 | the selected window. */ |
| 55 | Lisp_Object minibuf_window; |
| 56 | |
| 57 | /* Non-nil means it is the window for C-M-v to scroll |
| 58 | when the minibuffer is selected. */ |
| 59 | Lisp_Object Vminibuf_scroll_window; |
| 60 | |
| 61 | /* Non-nil means this is the buffer whose window C-M-v should scroll. */ |
| 62 | Lisp_Object Vother_window_scroll_buffer; |
| 63 | |
| 64 | /* Non-nil means it's function to call to display temp buffers. */ |
| 65 | Lisp_Object Vtemp_buffer_show_function; |
| 66 | |
| 67 | /* If a window gets smaller than either of these, it is removed. */ |
| 68 | int window_min_height; |
| 69 | int window_min_width; |
| 70 | |
| 71 | /* Nonzero implies Fdisplay_buffer should create windows. */ |
| 72 | int pop_up_windows; |
| 73 | |
| 74 | /* Nonzero implies make new frames for Fdisplay_buffer. */ |
| 75 | int pop_up_frames; |
| 76 | |
| 77 | /* Non-nil means use this function instead of default */ |
| 78 | Lisp_Object Vpop_up_frame_function; |
| 79 | |
| 80 | /* Function to call to handle Fdisplay_buffer. */ |
| 81 | Lisp_Object Vdisplay_buffer_function; |
| 82 | |
| 83 | /* List of buffer *names* for buffers that should have their own frames. */ |
| 84 | Lisp_Object Vspecial_display_buffer_names; |
| 85 | |
| 86 | /* List of regexps for buffer names that should have their own frames. */ |
| 87 | Lisp_Object Vspecial_display_regexps; |
| 88 | |
| 89 | /* Function to pop up a special frame. */ |
| 90 | Lisp_Object Vspecial_display_function; |
| 91 | |
| 92 | /* List of buffer *names* for buffers to appear in selected window. */ |
| 93 | Lisp_Object Vsame_window_buffer_names; |
| 94 | |
| 95 | /* List of regexps for buffer names to appear in selected window. */ |
| 96 | Lisp_Object Vsame_window_regexps; |
| 97 | |
| 98 | /* Hook run at end of temp_output_buffer_show. */ |
| 99 | Lisp_Object Qtemp_buffer_show_hook; |
| 100 | |
| 101 | /* Fdisplay_buffer always splits the largest window |
| 102 | if that window is more than this high. */ |
| 103 | int split_height_threshold; |
| 104 | |
| 105 | /* Number of lines of continuity in scrolling by screenfuls. */ |
| 106 | int next_screen_context_lines; |
| 107 | |
| 108 | /* Incremented for each window created. */ |
| 109 | static int sequence_number; |
| 110 | |
| 111 | /* Nonzero after init_window_once has finished. */ |
| 112 | static int window_initialized; |
| 113 | |
| 114 | /* Nonzero means scroll commands try to put point |
| 115 | at the same screen height as previously. */ |
| 116 | static int scroll_preserve_screen_position; |
| 117 | |
| 118 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 119 | |
| 120 | extern int scroll_margin; |
| 121 | |
| 122 | extern Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
| 123 | \f |
| 124 | DEFUN ("windowp", Fwindowp, Swindowp, 1, 1, 0, |
| 125 | "Returns t if OBJECT is a window.") |
| 126 | (object) |
| 127 | Lisp_Object object; |
| 128 | { |
| 129 | return WINDOWP (object) ? Qt : Qnil; |
| 130 | } |
| 131 | |
| 132 | DEFUN ("window-live-p", Fwindow_live_p, Swindow_live_p, 1, 1, 0, |
| 133 | "Returns t if OBJECT is a window which is currently visible.") |
| 134 | (object) |
| 135 | Lisp_Object object; |
| 136 | { |
| 137 | return (WINDOWP (object) && ! NILP (XWINDOW (object)->buffer) ? Qt : Qnil); |
| 138 | } |
| 139 | |
| 140 | Lisp_Object |
| 141 | make_window () |
| 142 | { |
| 143 | Lisp_Object val; |
| 144 | register struct window *p; |
| 145 | register struct Lisp_Vector *vec; |
| 146 | int i; |
| 147 | |
| 148 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct window)); |
| 149 | for (i = 0; i < VECSIZE (struct window); i++) |
| 150 | vec->contents[i] = Qnil; |
| 151 | vec->size = VECSIZE (struct window); |
| 152 | p = (struct window *)vec; |
| 153 | XSETFASTINT (p->sequence_number, ++sequence_number); |
| 154 | XSETFASTINT (p->left, 0); |
| 155 | XSETFASTINT (p->top, 0); |
| 156 | XSETFASTINT (p->height, 0); |
| 157 | XSETFASTINT (p->width, 0); |
| 158 | XSETFASTINT (p->hscroll, 0); |
| 159 | XSETFASTINT (p->last_point_x, 0); |
| 160 | XSETFASTINT (p->last_point_y, 0); |
| 161 | p->start = Fmake_marker (); |
| 162 | p->pointm = Fmake_marker (); |
| 163 | XSETFASTINT (p->use_time, 0); |
| 164 | p->frame = Qnil; |
| 165 | p->display_table = Qnil; |
| 166 | p->dedicated = Qnil; |
| 167 | XSETWINDOW (val, p); |
| 168 | return val; |
| 169 | } |
| 170 | |
| 171 | DEFUN ("selected-window", Fselected_window, Sselected_window, 0, 0, 0, |
| 172 | "Return the window that the cursor now appears in and commands apply to.") |
| 173 | () |
| 174 | { |
| 175 | return selected_window; |
| 176 | } |
| 177 | |
| 178 | DEFUN ("minibuffer-window", Fminibuffer_window, Sminibuffer_window, 0, 1, 0, |
| 179 | "Return the window used now for minibuffers.\n\ |
| 180 | If the optional argument FRAME is specified, return the minibuffer window\n\ |
| 181 | used by that frame.") |
| 182 | (frame) |
| 183 | Lisp_Object frame; |
| 184 | { |
| 185 | if (NILP (frame)) |
| 186 | XSETFRAME (frame, selected_frame); |
| 187 | else |
| 188 | CHECK_LIVE_FRAME (frame, 0); |
| 189 | |
| 190 | return FRAME_MINIBUF_WINDOW (XFRAME (frame)); |
| 191 | } |
| 192 | |
| 193 | DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p, Swindow_minibuffer_p, 0, 1, 0, |
| 194 | "Returns non-nil if WINDOW is a minibuffer window.") |
| 195 | (window) |
| 196 | Lisp_Object window; |
| 197 | { |
| 198 | struct window *w = decode_window (window); |
| 199 | return (MINI_WINDOW_P (w) ? Qt : Qnil); |
| 200 | } |
| 201 | |
| 202 | DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p, |
| 203 | Spos_visible_in_window_p, 0, 2, 0, |
| 204 | "Return t if position POS is currently on the frame in WINDOW.\n\ |
| 205 | Returns nil if that position is scrolled vertically out of view.\n\ |
| 206 | POS defaults to point; WINDOW, to the selected window.") |
| 207 | (pos, window) |
| 208 | Lisp_Object pos, window; |
| 209 | { |
| 210 | register struct window *w; |
| 211 | register int top; |
| 212 | register int height; |
| 213 | register int posint; |
| 214 | register struct buffer *buf; |
| 215 | struct position posval; |
| 216 | int hscroll; |
| 217 | |
| 218 | if (NILP (pos)) |
| 219 | posint = PT; |
| 220 | else |
| 221 | { |
| 222 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 223 | posint = XINT (pos); |
| 224 | } |
| 225 | |
| 226 | w = decode_window (window); |
| 227 | top = marker_position (w->start); |
| 228 | hscroll = XINT (w->hscroll); |
| 229 | |
| 230 | if (posint < top) |
| 231 | return Qnil; |
| 232 | |
| 233 | height = XFASTINT (w->height) - ! MINI_WINDOW_P (w); |
| 234 | |
| 235 | buf = XBUFFER (w->buffer); |
| 236 | if (XFASTINT (w->last_modified) >= BUF_MODIFF (buf) |
| 237 | && XFASTINT (w->last_overlay_modified) >= BUF_OVERLAY_MODIFF (buf)) |
| 238 | { |
| 239 | /* If frame is up to date, |
| 240 | use the info recorded about how much text fit on it. */ |
| 241 | if (posint < BUF_Z (buf) - XFASTINT (w->window_end_pos) |
| 242 | || (XFASTINT (w->window_end_vpos) < height)) |
| 243 | return Qt; |
| 244 | return Qnil; |
| 245 | } |
| 246 | else |
| 247 | { |
| 248 | if (posint > BUF_ZV (buf)) |
| 249 | return Qnil; |
| 250 | |
| 251 | /* w->start can be out of range. If it is, do something reasonable. */ |
| 252 | if (top < BUF_BEGV (buf) || top > BUF_ZV (buf)) |
| 253 | return Qnil; |
| 254 | |
| 255 | /* If that info is not correct, calculate afresh */ |
| 256 | /* BUG FIX for the 7th arg (TOHPOS). |
| 257 | |
| 258 | '0' is harmless, however, ' - (1 << (BITS_PER_SHORT - 1))' is |
| 259 | more appropriate here. In case of HSCROLL > 0, this can avoid |
| 260 | needless calculation done until (HPOS == 0). |
| 261 | |
| 262 | We want to determine if the position POSINT is in HEIGHT or |
| 263 | not. We don't have to do calculation until (HPOS == 0). We |
| 264 | can stop it when VPOS goes beyond HEIGHT. */ |
| 265 | posval = *compute_motion (top, 0, (hscroll ? 1 - hscroll : 0), 0, |
| 266 | posint, height, - (1 << (BITS_PER_SHORT - 1)), |
| 267 | window_internal_width (w) - 1, |
| 268 | hscroll, 0, w); |
| 269 | |
| 270 | return posval.vpos < height ? Qt : Qnil; |
| 271 | } |
| 272 | } |
| 273 | \f |
| 274 | static struct window * |
| 275 | decode_window (window) |
| 276 | register Lisp_Object window; |
| 277 | { |
| 278 | if (NILP (window)) |
| 279 | return XWINDOW (selected_window); |
| 280 | |
| 281 | CHECK_LIVE_WINDOW (window, 0); |
| 282 | return XWINDOW (window); |
| 283 | } |
| 284 | |
| 285 | DEFUN ("window-buffer", Fwindow_buffer, Swindow_buffer, 0, 1, 0, |
| 286 | "Return the buffer that WINDOW is displaying.") |
| 287 | (window) |
| 288 | Lisp_Object window; |
| 289 | { |
| 290 | return decode_window (window)->buffer; |
| 291 | } |
| 292 | |
| 293 | DEFUN ("window-height", Fwindow_height, Swindow_height, 0, 1, 0, |
| 294 | "Return the number of lines in WINDOW (including its mode line).") |
| 295 | (window) |
| 296 | Lisp_Object window; |
| 297 | { |
| 298 | return decode_window (window)->height; |
| 299 | } |
| 300 | |
| 301 | DEFUN ("window-width", Fwindow_width, Swindow_width, 0, 1, 0, |
| 302 | "Return the number of display columns in WINDOW.\n\ |
| 303 | This is the width that is usable columns available for text in WINDOW.\n\ |
| 304 | If you want to find out how many columns WINDOW takes up,\n\ |
| 305 | use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).") |
| 306 | (window) |
| 307 | Lisp_Object window; |
| 308 | { |
| 309 | return make_number (window_internal_width (decode_window (window))); |
| 310 | } |
| 311 | |
| 312 | DEFUN ("window-hscroll", Fwindow_hscroll, Swindow_hscroll, 0, 1, 0, |
| 313 | "Return the number of columns by which WINDOW is scrolled from left margin.") |
| 314 | (window) |
| 315 | Lisp_Object window; |
| 316 | { |
| 317 | return decode_window (window)->hscroll; |
| 318 | } |
| 319 | |
| 320 | DEFUN ("set-window-hscroll", Fset_window_hscroll, Sset_window_hscroll, 2, 2, 0, |
| 321 | "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\ |
| 322 | NCOL should be zero or positive.") |
| 323 | (window, ncol) |
| 324 | register Lisp_Object window, ncol; |
| 325 | { |
| 326 | register struct window *w; |
| 327 | |
| 328 | CHECK_NUMBER (ncol, 1); |
| 329 | if (XINT (ncol) < 0) XSETFASTINT (ncol, 0); |
| 330 | w = decode_window (window); |
| 331 | if (XINT (w->hscroll) != XINT (ncol)) |
| 332 | XBUFFER (w->buffer)->clip_changed = 1; /* Prevent redisplay shortcuts */ |
| 333 | w->hscroll = ncol; |
| 334 | return ncol; |
| 335 | } |
| 336 | |
| 337 | DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger, |
| 338 | Swindow_redisplay_end_trigger, 0, 1, 0, |
| 339 | "Return WINDOW's redisplay end trigger value.\n\ |
| 340 | See `set-window-redisplay-end-trigger' for more information.") |
| 341 | (window) |
| 342 | Lisp_Object window; |
| 343 | { |
| 344 | return decode_window (window)->redisplay_end_trigger; |
| 345 | } |
| 346 | |
| 347 | DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger, |
| 348 | Sset_window_redisplay_end_trigger, 2, 2, 0, |
| 349 | "Set WINDOW's redisplay end trigger value to VALUE.\n\ |
| 350 | VALUE should be a buffer position (typically a marker) or nil.\n\ |
| 351 | If it is a buffer position, then if redisplay in WINDOW reaches a position\n\ |
| 352 | beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\ |
| 353 | with two arguments: WINDOW, and the end trigger value.\n\ |
| 354 | Afterwards the end-trigger value is reset to nil.") |
| 355 | (window, value) |
| 356 | register Lisp_Object window, value; |
| 357 | { |
| 358 | register struct window *w; |
| 359 | |
| 360 | w = decode_window (window); |
| 361 | w->redisplay_end_trigger = value; |
| 362 | return value; |
| 363 | } |
| 364 | |
| 365 | DEFUN ("window-edges", Fwindow_edges, Swindow_edges, 0, 1, 0, |
| 366 | "Return a list of the edge coordinates of WINDOW.\n\ |
| 367 | \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\ |
| 368 | RIGHT is one more than the rightmost column used by WINDOW,\n\ |
| 369 | and BOTTOM is one more than the bottommost row used by WINDOW\n\ |
| 370 | and its mode-line.") |
| 371 | (window) |
| 372 | Lisp_Object window; |
| 373 | { |
| 374 | register struct window *w = decode_window (window); |
| 375 | |
| 376 | return Fcons (w->left, Fcons (w->top, |
| 377 | Fcons (make_number (WINDOW_RIGHT_EDGE (w)), |
| 378 | Fcons (make_number (XFASTINT (w->top) |
| 379 | + XFASTINT (w->height)), |
| 380 | Qnil)))); |
| 381 | } |
| 382 | |
| 383 | /* Test if the character at column *x, row *y is within window *w. |
| 384 | If it is not, return 0; |
| 385 | if it is in the window's text area, |
| 386 | set *x and *y to its location relative to the upper left corner |
| 387 | of the window, and |
| 388 | return 1; |
| 389 | if it is on the window's modeline, return 2; |
| 390 | if it is on the border between the window and its right sibling, |
| 391 | return 3. */ |
| 392 | static int |
| 393 | coordinates_in_window (w, x, y) |
| 394 | register struct window *w; |
| 395 | register int *x, *y; |
| 396 | { |
| 397 | register int left = XINT (w->left); |
| 398 | register int right_edge = WINDOW_RIGHT_EDGE (w); |
| 399 | register int left_margin = WINDOW_LEFT_MARGIN (w); |
| 400 | register int right_margin = WINDOW_RIGHT_MARGIN (w); |
| 401 | register int window_height = XINT (w->height); |
| 402 | register int top = XFASTINT (w->top); |
| 403 | |
| 404 | if ( *x < left || *x >= right_edge |
| 405 | || *y < top || *y >= top + window_height) |
| 406 | return 0; |
| 407 | |
| 408 | if (left_margin != left && *x < left_margin && *x >= left) |
| 409 | return 3; |
| 410 | |
| 411 | if (right_margin != right_edge && *x >= right_margin && *x < right_edge) |
| 412 | return 3; |
| 413 | |
| 414 | /* Is the character is the mode line? */ |
| 415 | if (*y == top + window_height - 1 |
| 416 | && ! MINI_WINDOW_P (w)) |
| 417 | return 2; |
| 418 | |
| 419 | *x -= WINDOW_LEFT_MARGIN (w); |
| 420 | *y -= top; |
| 421 | return 1; |
| 422 | } |
| 423 | |
| 424 | DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p, |
| 425 | Scoordinates_in_window_p, 2, 2, 0, |
| 426 | "Return non-nil if COORDINATES are in WINDOW.\n\ |
| 427 | COORDINATES is a cons of the form (X . Y), X and Y being distances\n\ |
| 428 | measured in characters from the upper-left corner of the frame.\n\ |
| 429 | (0 . 0) denotes the character in the upper left corner of the\n\ |
| 430 | frame.\n\ |
| 431 | If COORDINATES are in the text portion of WINDOW,\n\ |
| 432 | the coordinates relative to the window are returned.\n\ |
| 433 | If they are in the mode line of WINDOW, `mode-line' is returned.\n\ |
| 434 | If they are on the border between WINDOW and its right sibling,\n\ |
| 435 | `vertical-line' is returned.") |
| 436 | (coordinates, window) |
| 437 | register Lisp_Object coordinates, window; |
| 438 | { |
| 439 | int x, y; |
| 440 | |
| 441 | CHECK_LIVE_WINDOW (window, 0); |
| 442 | CHECK_CONS (coordinates, 1); |
| 443 | x = XINT (Fcar (coordinates)); |
| 444 | y = XINT (Fcdr (coordinates)); |
| 445 | |
| 446 | switch (coordinates_in_window (XWINDOW (window), &x, &y)) |
| 447 | { |
| 448 | case 0: /* NOT in window at all. */ |
| 449 | return Qnil; |
| 450 | |
| 451 | case 1: /* In text part of window. */ |
| 452 | return Fcons (x, y); |
| 453 | |
| 454 | case 2: /* In mode line of window. */ |
| 455 | return Qmode_line; |
| 456 | |
| 457 | case 3: /* On right border of window. */ |
| 458 | return Qvertical_line; |
| 459 | |
| 460 | default: |
| 461 | abort (); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | /* Find the window containing column x, row y, and return it as a |
| 466 | Lisp_Object. If x, y is on the window's modeline, set *part |
| 467 | to 1; if it is on the separating line between the window and its |
| 468 | right sibling, set it to 2; otherwise set it to 0. If there is no |
| 469 | window under x, y return nil and leave *part unmodified. */ |
| 470 | Lisp_Object |
| 471 | window_from_coordinates (frame, x, y, part) |
| 472 | FRAME_PTR frame; |
| 473 | int x, y; |
| 474 | int *part; |
| 475 | { |
| 476 | register Lisp_Object tem, first; |
| 477 | |
| 478 | tem = first = FRAME_SELECTED_WINDOW (frame); |
| 479 | |
| 480 | do |
| 481 | { |
| 482 | int found = coordinates_in_window (XWINDOW (tem), &x, &y); |
| 483 | |
| 484 | if (found) |
| 485 | { |
| 486 | *part = found - 1; |
| 487 | return tem; |
| 488 | } |
| 489 | |
| 490 | tem = Fnext_window (tem, Qt, Qlambda); |
| 491 | } |
| 492 | while (! EQ (tem, first)); |
| 493 | |
| 494 | return Qnil; |
| 495 | } |
| 496 | |
| 497 | DEFUN ("window-at", Fwindow_at, Swindow_at, 2, 3, 0, |
| 498 | "Return window containing coordinates X and Y on FRAME.\n\ |
| 499 | If omitted, FRAME defaults to the currently selected frame.\n\ |
| 500 | The top left corner of the frame is considered to be row 0,\n\ |
| 501 | column 0.") |
| 502 | (x, y, frame) |
| 503 | Lisp_Object x, y, frame; |
| 504 | { |
| 505 | int part; |
| 506 | |
| 507 | if (NILP (frame)) |
| 508 | XSETFRAME (frame, selected_frame); |
| 509 | else |
| 510 | CHECK_LIVE_FRAME (frame, 2); |
| 511 | CHECK_NUMBER (x, 0); |
| 512 | CHECK_NUMBER (y, 1); |
| 513 | |
| 514 | return window_from_coordinates (XFRAME (frame), |
| 515 | XINT (x), XINT (y), |
| 516 | &part); |
| 517 | } |
| 518 | |
| 519 | DEFUN ("window-point", Fwindow_point, Swindow_point, 0, 1, 0, |
| 520 | "Return current value of point in WINDOW.\n\ |
| 521 | For a nonselected window, this is the value point would have\n\ |
| 522 | if that window were selected.\n\ |
| 523 | \n\ |
| 524 | Note that, when WINDOW is the selected window and its buffer\n\ |
| 525 | is also currently selected, the value returned is the same as (point).\n\ |
| 526 | It would be more strictly correct to return the `top-level' value\n\ |
| 527 | of point, outside of any save-excursion forms.\n\ |
| 528 | But that is hard to define.") |
| 529 | (window) |
| 530 | Lisp_Object window; |
| 531 | { |
| 532 | register struct window *w = decode_window (window); |
| 533 | |
| 534 | if (w == XWINDOW (selected_window) |
| 535 | && current_buffer == XBUFFER (w->buffer)) |
| 536 | return Fpoint (); |
| 537 | return Fmarker_position (w->pointm); |
| 538 | } |
| 539 | |
| 540 | DEFUN ("window-start", Fwindow_start, Swindow_start, 0, 1, 0, |
| 541 | "Return position at which display currently starts in WINDOW.\n\ |
| 542 | This is updated by redisplay or by calling `set-window-start'.") |
| 543 | (window) |
| 544 | Lisp_Object window; |
| 545 | { |
| 546 | return Fmarker_position (decode_window (window)->start); |
| 547 | } |
| 548 | |
| 549 | /* This is text temporarily removed from the doc string below. |
| 550 | |
| 551 | This function returns nil if the position is not currently known.\n\ |
| 552 | That happens when redisplay is preempted and doesn't finish.\n\ |
| 553 | If in that case you want to compute where the end of the window would\n\ |
| 554 | have been if redisplay had finished, do this:\n\ |
| 555 | (save-excursion\n\ |
| 556 | (goto-char (window-start window))\n\ |
| 557 | (vertical-motion (1- (window-height window)) window)\n\ |
| 558 | (point))") */ |
| 559 | |
| 560 | DEFUN ("window-end", Fwindow_end, Swindow_end, 0, 1, 0, |
| 561 | "Return position at which display currently ends in WINDOW.\n\ |
| 562 | This is updated by redisplay, when it runs to completion.\n\ |
| 563 | Simply changing the buffer text or setting `window-start'\n\ |
| 564 | does not update this value.") |
| 565 | (window) |
| 566 | Lisp_Object window; |
| 567 | { |
| 568 | Lisp_Object value; |
| 569 | struct window *w = decode_window (window); |
| 570 | Lisp_Object buf; |
| 571 | |
| 572 | buf = w->buffer; |
| 573 | CHECK_BUFFER (buf, 0); |
| 574 | |
| 575 | #if 0 /* This change broke some things. We should make it later. */ |
| 576 | /* If we don't know the end position, return nil. |
| 577 | The user can compute it with vertical-motion if he wants to. |
| 578 | It would be nicer to do it automatically, |
| 579 | but that's so slow that it would probably bother people. */ |
| 580 | if (NILP (w->window_end_valid)) |
| 581 | return Qnil; |
| 582 | #endif |
| 583 | |
| 584 | XSETINT (value, |
| 585 | BUF_Z (XBUFFER (buf)) - XFASTINT (w->window_end_pos)); |
| 586 | |
| 587 | return value; |
| 588 | } |
| 589 | |
| 590 | DEFUN ("set-window-point", Fset_window_point, Sset_window_point, 2, 2, 0, |
| 591 | "Make point value in WINDOW be at position POS in WINDOW's buffer.") |
| 592 | (window, pos) |
| 593 | Lisp_Object window, pos; |
| 594 | { |
| 595 | register struct window *w = decode_window (window); |
| 596 | |
| 597 | CHECK_NUMBER_COERCE_MARKER (pos, 1); |
| 598 | if (w == XWINDOW (selected_window)) |
| 599 | Fgoto_char (pos); |
| 600 | else |
| 601 | set_marker_restricted (w->pointm, pos, w->buffer); |
| 602 | |
| 603 | return pos; |
| 604 | } |
| 605 | |
| 606 | DEFUN ("set-window-start", Fset_window_start, Sset_window_start, 2, 3, 0, |
| 607 | "Make display in WINDOW start at position POS in WINDOW's buffer.\n\ |
| 608 | Optional third arg NOFORCE non-nil inhibits next redisplay\n\ |
| 609 | from overriding motion of point in order to display at this exact start.") |
| 610 | (window, pos, noforce) |
| 611 | Lisp_Object window, pos, noforce; |
| 612 | { |
| 613 | register struct window *w = decode_window (window); |
| 614 | |
| 615 | CHECK_NUMBER_COERCE_MARKER (pos, 1); |
| 616 | set_marker_restricted (w->start, pos, w->buffer); |
| 617 | /* this is not right, but much easier than doing what is right. */ |
| 618 | w->start_at_line_beg = Qnil; |
| 619 | if (NILP (noforce)) |
| 620 | w->force_start = Qt; |
| 621 | w->update_mode_line = Qt; |
| 622 | XSETFASTINT (w->last_modified, 0); |
| 623 | XSETFASTINT (w->last_overlay_modified, 0); |
| 624 | if (!EQ (window, selected_window)) |
| 625 | windows_or_buffers_changed++; |
| 626 | return pos; |
| 627 | } |
| 628 | |
| 629 | DEFUN ("window-dedicated-p", Fwindow_dedicated_p, Swindow_dedicated_p, |
| 630 | 1, 1, 0, |
| 631 | "Return WINDOW's dedicated object, usually t or nil.\n\ |
| 632 | See also `set-window-dedicated-p'.") |
| 633 | (window) |
| 634 | Lisp_Object window; |
| 635 | { |
| 636 | return decode_window (window)->dedicated; |
| 637 | } |
| 638 | |
| 639 | DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p, |
| 640 | Sset_window_dedicated_p, 2, 2, 0, |
| 641 | "Control whether WINDOW is dedicated to the buffer it displays.\n\ |
| 642 | If it is dedicated, Emacs will not automatically change\n\ |
| 643 | which buffer appears in it.\n\ |
| 644 | The second argument is the new value for the dedication flag;\n\ |
| 645 | non-nil means yes.") |
| 646 | (window, arg) |
| 647 | Lisp_Object window, arg; |
| 648 | { |
| 649 | register struct window *w = decode_window (window); |
| 650 | |
| 651 | if (NILP (arg)) |
| 652 | w->dedicated = Qnil; |
| 653 | else |
| 654 | w->dedicated = Qt; |
| 655 | |
| 656 | return w->dedicated; |
| 657 | } |
| 658 | |
| 659 | DEFUN ("window-display-table", Fwindow_display_table, Swindow_display_table, |
| 660 | 0, 1, 0, |
| 661 | "Return the display-table that WINDOW is using.") |
| 662 | (window) |
| 663 | Lisp_Object window; |
| 664 | { |
| 665 | return decode_window (window)->display_table; |
| 666 | } |
| 667 | |
| 668 | /* Get the display table for use currently on window W. |
| 669 | This is either W's display table or W's buffer's display table. |
| 670 | Ignore the specified tables if they are not valid; |
| 671 | if no valid table is specified, return 0. */ |
| 672 | |
| 673 | struct Lisp_Char_Table * |
| 674 | window_display_table (w) |
| 675 | struct window *w; |
| 676 | { |
| 677 | Lisp_Object tem; |
| 678 | tem = w->display_table; |
| 679 | if (DISP_TABLE_P (tem)) |
| 680 | return XCHAR_TABLE (tem); |
| 681 | tem = XBUFFER (w->buffer)->display_table; |
| 682 | if (DISP_TABLE_P (tem)) |
| 683 | return XCHAR_TABLE (tem); |
| 684 | tem = Vstandard_display_table; |
| 685 | if (DISP_TABLE_P (tem)) |
| 686 | return XCHAR_TABLE (tem); |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | DEFUN ("set-window-display-table", Fset_window_display_table, Sset_window_display_table, 2, 2, 0, |
| 691 | "Set WINDOW's display-table to TABLE.") |
| 692 | (window, table) |
| 693 | register Lisp_Object window, table; |
| 694 | { |
| 695 | register struct window *w; |
| 696 | register Lisp_Object z; /* Return value. */ |
| 697 | |
| 698 | w = decode_window (window); |
| 699 | w->display_table = table; |
| 700 | return table; |
| 701 | } |
| 702 | \f |
| 703 | /* Record info on buffer window w is displaying |
| 704 | when it is about to cease to display that buffer. */ |
| 705 | static |
| 706 | unshow_buffer (w) |
| 707 | register struct window *w; |
| 708 | { |
| 709 | Lisp_Object buf; |
| 710 | |
| 711 | buf = w->buffer; |
| 712 | if (XBUFFER (buf) != XMARKER (w->pointm)->buffer) |
| 713 | abort (); |
| 714 | |
| 715 | if (w == XWINDOW (XBUFFER (buf)->last_selected_window)) |
| 716 | XBUFFER (buf)->last_selected_window = Qnil; |
| 717 | |
| 718 | #if 0 |
| 719 | if (w == XWINDOW (selected_window) |
| 720 | || ! EQ (buf, XWINDOW (selected_window)->buffer)) |
| 721 | /* Do this except when the selected window's buffer |
| 722 | is being removed from some other window. */ |
| 723 | #endif |
| 724 | /* last_window_start records the start position that this buffer |
| 725 | had in the last window to be disconnected from it. |
| 726 | Now that this statement is unconditional, |
| 727 | it is possible for the buffer to be displayed in the |
| 728 | selected window, while last_window_start reflects another |
| 729 | window which was recently showing the same buffer. |
| 730 | Some people might say that might be a good thing. Let's see. */ |
| 731 | XBUFFER (buf)->last_window_start = marker_position (w->start); |
| 732 | |
| 733 | /* Point in the selected window's buffer |
| 734 | is actually stored in that buffer, and the window's pointm isn't used. |
| 735 | So don't clobber point in that buffer. */ |
| 736 | if (! EQ (buf, XWINDOW (selected_window)->buffer)) |
| 737 | BUF_PT (XBUFFER (buf)) |
| 738 | = clip_to_bounds (BUF_BEGV (XBUFFER (buf)), |
| 739 | marker_position (w->pointm), |
| 740 | BUF_ZV (XBUFFER (buf))); |
| 741 | } |
| 742 | |
| 743 | /* Put replacement into the window structure in place of old. */ |
| 744 | static |
| 745 | replace_window (old, replacement) |
| 746 | Lisp_Object old, replacement; |
| 747 | { |
| 748 | register Lisp_Object tem; |
| 749 | register struct window *o = XWINDOW (old), *p = XWINDOW (replacement); |
| 750 | |
| 751 | /* If OLD is its frame's root_window, then replacement is the new |
| 752 | root_window for that frame. */ |
| 753 | |
| 754 | if (EQ (old, FRAME_ROOT_WINDOW (XFRAME (o->frame)))) |
| 755 | FRAME_ROOT_WINDOW (XFRAME (o->frame)) = replacement; |
| 756 | |
| 757 | p->left = o->left; |
| 758 | p->top = o->top; |
| 759 | p->width = o->width; |
| 760 | p->height = o->height; |
| 761 | |
| 762 | p->next = tem = o->next; |
| 763 | if (!NILP (tem)) |
| 764 | XWINDOW (tem)->prev = replacement; |
| 765 | |
| 766 | p->prev = tem = o->prev; |
| 767 | if (!NILP (tem)) |
| 768 | XWINDOW (tem)->next = replacement; |
| 769 | |
| 770 | p->parent = tem = o->parent; |
| 771 | if (!NILP (tem)) |
| 772 | { |
| 773 | if (EQ (XWINDOW (tem)->vchild, old)) |
| 774 | XWINDOW (tem)->vchild = replacement; |
| 775 | if (EQ (XWINDOW (tem)->hchild, old)) |
| 776 | XWINDOW (tem)->hchild = replacement; |
| 777 | } |
| 778 | |
| 779 | /*** Here, if replacement is a vertical combination |
| 780 | and so is its new parent, we should make replacement's |
| 781 | children be children of that parent instead. ***/ |
| 782 | } |
| 783 | |
| 784 | DEFUN ("delete-window", Fdelete_window, Sdelete_window, 0, 1, "", |
| 785 | "Remove WINDOW from the display. Default is selected window.") |
| 786 | (window) |
| 787 | register Lisp_Object window; |
| 788 | { |
| 789 | register Lisp_Object tem, parent, sib; |
| 790 | register struct window *p; |
| 791 | register struct window *par; |
| 792 | |
| 793 | /* Because this function is called by other C code on non-leaf |
| 794 | windows, the CHECK_LIVE_WINDOW macro would choke inappropriately, |
| 795 | so we can't decode_window here. */ |
| 796 | if (NILP (window)) |
| 797 | window = selected_window; |
| 798 | else |
| 799 | CHECK_WINDOW (window, 0); |
| 800 | p = XWINDOW (window); |
| 801 | |
| 802 | /* It's okay to delete an already-deleted window. */ |
| 803 | if (NILP (p->buffer) |
| 804 | && NILP (p->hchild) |
| 805 | && NILP (p->vchild)) |
| 806 | return Qnil; |
| 807 | |
| 808 | parent = p->parent; |
| 809 | if (NILP (parent)) |
| 810 | error ("Attempt to delete minibuffer or sole ordinary window"); |
| 811 | par = XWINDOW (parent); |
| 812 | |
| 813 | windows_or_buffers_changed++; |
| 814 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (p))) = 1; |
| 815 | |
| 816 | /* Are we trying to delete any frame's selected window? */ |
| 817 | { |
| 818 | Lisp_Object frame, pwindow; |
| 819 | |
| 820 | /* See if the frame's selected window is either WINDOW |
| 821 | or any subwindow of it, by finding all that window's parents |
| 822 | and comparing each one with WINDOW. */ |
| 823 | frame = WINDOW_FRAME (XWINDOW (window)); |
| 824 | pwindow = FRAME_SELECTED_WINDOW (XFRAME (frame)); |
| 825 | |
| 826 | while (!NILP (pwindow)) |
| 827 | { |
| 828 | if (EQ (window, pwindow)) |
| 829 | break; |
| 830 | pwindow = XWINDOW (pwindow)->parent; |
| 831 | } |
| 832 | |
| 833 | if (EQ (window, pwindow)) |
| 834 | { |
| 835 | Lisp_Object alternative; |
| 836 | alternative = Fnext_window (window, Qlambda, Qnil); |
| 837 | |
| 838 | /* If we're about to delete the selected window on the |
| 839 | selected frame, then we should use Fselect_window to select |
| 840 | the new window. On the other hand, if we're about to |
| 841 | delete the selected window on any other frame, we shouldn't do |
| 842 | anything but set the frame's selected_window slot. */ |
| 843 | if (EQ (window, selected_window)) |
| 844 | Fselect_window (alternative); |
| 845 | else |
| 846 | FRAME_SELECTED_WINDOW (XFRAME (frame)) = alternative; |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | tem = p->buffer; |
| 851 | /* tem is null for dummy parent windows |
| 852 | (which have inferiors but not any contents themselves) */ |
| 853 | if (!NILP (tem)) |
| 854 | { |
| 855 | unshow_buffer (p); |
| 856 | unchain_marker (p->pointm); |
| 857 | unchain_marker (p->start); |
| 858 | } |
| 859 | |
| 860 | tem = p->next; |
| 861 | if (!NILP (tem)) |
| 862 | XWINDOW (tem)->prev = p->prev; |
| 863 | |
| 864 | tem = p->prev; |
| 865 | if (!NILP (tem)) |
| 866 | XWINDOW (tem)->next = p->next; |
| 867 | |
| 868 | if (EQ (window, par->hchild)) |
| 869 | par->hchild = p->next; |
| 870 | if (EQ (window, par->vchild)) |
| 871 | par->vchild = p->next; |
| 872 | |
| 873 | /* Find one of our siblings to give our space to. */ |
| 874 | sib = p->prev; |
| 875 | if (NILP (sib)) |
| 876 | { |
| 877 | /* If p gives its space to its next sibling, that sibling needs |
| 878 | to have its top/left side pulled back to where p's is. |
| 879 | set_window_{height,width} will re-position the sibling's |
| 880 | children. */ |
| 881 | sib = p->next; |
| 882 | XWINDOW (sib)->top = p->top; |
| 883 | XWINDOW (sib)->left = p->left; |
| 884 | } |
| 885 | |
| 886 | /* Stretch that sibling. */ |
| 887 | if (!NILP (par->vchild)) |
| 888 | set_window_height (sib, |
| 889 | XFASTINT (XWINDOW (sib)->height) + XFASTINT (p->height), |
| 890 | 1); |
| 891 | if (!NILP (par->hchild)) |
| 892 | set_window_width (sib, |
| 893 | XFASTINT (XWINDOW (sib)->width) + XFASTINT (p->width), |
| 894 | 1); |
| 895 | |
| 896 | /* If parent now has only one child, |
| 897 | put the child into the parent's place. */ |
| 898 | tem = par->hchild; |
| 899 | if (NILP (tem)) |
| 900 | tem = par->vchild; |
| 901 | if (NILP (XWINDOW (tem)->next)) |
| 902 | replace_window (parent, tem); |
| 903 | |
| 904 | /* Since we may be deleting combination windows, we must make sure that |
| 905 | not only p but all its children have been marked as deleted. */ |
| 906 | if (! NILP (p->hchild)) |
| 907 | delete_all_subwindows (XWINDOW (p->hchild)); |
| 908 | else if (! NILP (p->vchild)) |
| 909 | delete_all_subwindows (XWINDOW (p->vchild)); |
| 910 | |
| 911 | /* Mark this window as deleted. */ |
| 912 | p->buffer = p->hchild = p->vchild = Qnil; |
| 913 | |
| 914 | return Qnil; |
| 915 | } |
| 916 | \f |
| 917 | |
| 918 | extern Lisp_Object next_frame (), prev_frame (); |
| 919 | |
| 920 | /* This comment supplies the doc string for `next-window', |
| 921 | for make-docfile to see. We cannot put this in the real DEFUN |
| 922 | due to limits in the Unix cpp. |
| 923 | |
| 924 | DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0, |
| 925 | "Return next window after WINDOW in canonical ordering of windows.\n\ |
| 926 | If omitted, WINDOW defaults to the selected window.\n\ |
| 927 | \n\ |
| 928 | Optional second arg MINIBUF t means count the minibuffer window even\n\ |
| 929 | if not active. MINIBUF nil or omitted means count the minibuffer iff\n\ |
| 930 | it is active. MINIBUF neither t nor nil means not to count the\n\ |
| 931 | minibuffer even if it is active.\n\ |
| 932 | \n\ |
| 933 | Several frames may share a single minibuffer; if the minibuffer\n\ |
| 934 | counts, all windows on all frames that share that minibuffer count\n\ |
| 935 | too. Therefore, `next-window' can be used to iterate through the\n\ |
| 936 | set of windows even when the minibuffer is on another frame. If the\n\ |
| 937 | minibuffer does not count, only windows from WINDOW's frame count.\n\ |
| 938 | \n\ |
| 939 | Optional third arg ALL-FRAMES t means include windows on all frames.\n\ |
| 940 | ALL-FRAMES nil or omitted means cycle within the frames as specified\n\ |
| 941 | above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\ |
| 942 | ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\ |
| 943 | If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\ |
| 944 | Anything else means restrict to WINDOW's frame.\n\ |
| 945 | \n\ |
| 946 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\ |
| 947 | `next-window' to iterate through the entire cycle of acceptable\n\ |
| 948 | windows, eventually ending up back at the window you started with.\n\ |
| 949 | `previous-window' traverses the same cycle, in the reverse order.") |
| 950 | (window, minibuf, all_frames) */ |
| 951 | |
| 952 | DEFUN ("next-window", Fnext_window, Snext_window, 0, 3, 0, |
| 953 | 0) |
| 954 | (window, minibuf, all_frames) |
| 955 | register Lisp_Object window, minibuf, all_frames; |
| 956 | { |
| 957 | register Lisp_Object tem; |
| 958 | Lisp_Object start_window; |
| 959 | |
| 960 | if (NILP (window)) |
| 961 | window = selected_window; |
| 962 | else |
| 963 | CHECK_LIVE_WINDOW (window, 0); |
| 964 | |
| 965 | start_window = window; |
| 966 | |
| 967 | /* minibuf == nil may or may not include minibuffers. |
| 968 | Decide if it does. */ |
| 969 | if (NILP (minibuf)) |
| 970 | minibuf = (minibuf_level ? minibuf_window : Qlambda); |
| 971 | else if (! EQ (minibuf, Qt)) |
| 972 | minibuf = Qlambda; |
| 973 | /* Now minibuf can be t => count all minibuffer windows, |
| 974 | lambda => count none of them, |
| 975 | or a specific minibuffer window (the active one) to count. */ |
| 976 | |
| 977 | /* all_frames == nil doesn't specify which frames to include. */ |
| 978 | if (NILP (all_frames)) |
| 979 | all_frames = (! EQ (minibuf, Qlambda) |
| 980 | ? (FRAME_MINIBUF_WINDOW |
| 981 | (XFRAME |
| 982 | (WINDOW_FRAME |
| 983 | (XWINDOW (window))))) |
| 984 | : Qnil); |
| 985 | else if (EQ (all_frames, Qvisible)) |
| 986 | ; |
| 987 | else if (XFASTINT (all_frames) == 0) |
| 988 | ; |
| 989 | else if (FRAMEP (all_frames) && ! EQ (all_frames, Fwindow_frame (window))) |
| 990 | /* If all_frames is a frame and window arg isn't on that frame, just |
| 991 | return the first window on the frame. */ |
| 992 | return Fframe_first_window (all_frames); |
| 993 | else if (! EQ (all_frames, Qt)) |
| 994 | all_frames = Qnil; |
| 995 | /* Now all_frames is t meaning search all frames, |
| 996 | nil meaning search just current frame, |
| 997 | visible meaning search just visible frames, |
| 998 | 0 meaning search visible and iconified frames, |
| 999 | or a window, meaning search the frame that window belongs to. */ |
| 1000 | |
| 1001 | /* Do this loop at least once, to get the next window, and perhaps |
| 1002 | again, if we hit the minibuffer and that is not acceptable. */ |
| 1003 | do |
| 1004 | { |
| 1005 | /* Find a window that actually has a next one. This loop |
| 1006 | climbs up the tree. */ |
| 1007 | while (tem = XWINDOW (window)->next, NILP (tem)) |
| 1008 | if (tem = XWINDOW (window)->parent, !NILP (tem)) |
| 1009 | window = tem; |
| 1010 | else |
| 1011 | { |
| 1012 | /* We've reached the end of this frame. |
| 1013 | Which other frames are acceptable? */ |
| 1014 | tem = WINDOW_FRAME (XWINDOW (window)); |
| 1015 | if (! NILP (all_frames)) |
| 1016 | { |
| 1017 | Lisp_Object tem1; |
| 1018 | |
| 1019 | tem1 = tem; |
| 1020 | tem = next_frame (tem, all_frames); |
| 1021 | /* In the case where the minibuffer is active, |
| 1022 | and we include its frame as well as the selected one, |
| 1023 | next_frame may get stuck in that frame. |
| 1024 | If that happens, go back to the selected frame |
| 1025 | so we can complete the cycle. */ |
| 1026 | if (EQ (tem, tem1)) |
| 1027 | XSETFRAME (tem, selected_frame); |
| 1028 | } |
| 1029 | tem = FRAME_ROOT_WINDOW (XFRAME (tem)); |
| 1030 | |
| 1031 | break; |
| 1032 | } |
| 1033 | |
| 1034 | window = tem; |
| 1035 | |
| 1036 | /* If we're in a combination window, find its first child and |
| 1037 | recurse on that. Otherwise, we've found the window we want. */ |
| 1038 | while (1) |
| 1039 | { |
| 1040 | if (!NILP (XWINDOW (window)->hchild)) |
| 1041 | window = XWINDOW (window)->hchild; |
| 1042 | else if (!NILP (XWINDOW (window)->vchild)) |
| 1043 | window = XWINDOW (window)->vchild; |
| 1044 | else break; |
| 1045 | } |
| 1046 | } |
| 1047 | /* Which windows are acceptable? |
| 1048 | Exit the loop and accept this window if |
| 1049 | this isn't a minibuffer window, |
| 1050 | or we're accepting all minibuffer windows, |
| 1051 | or this is the active minibuffer and we are accepting that one, or |
| 1052 | we've come all the way around and we're back at the original window. */ |
| 1053 | while (MINI_WINDOW_P (XWINDOW (window)) |
| 1054 | && ! EQ (minibuf, Qt) |
| 1055 | && ! EQ (minibuf, window) |
| 1056 | && ! EQ (window, start_window)); |
| 1057 | |
| 1058 | return window; |
| 1059 | } |
| 1060 | |
| 1061 | /* This comment supplies the doc string for `previous-window', |
| 1062 | for make-docfile to see. We cannot put this in the real DEFUN |
| 1063 | due to limits in the Unix cpp. |
| 1064 | |
| 1065 | DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0, |
| 1066 | "Return the window preceding WINDOW in canonical ordering of windows.\n\ |
| 1067 | If omitted, WINDOW defaults to the selected window.\n\ |
| 1068 | \n\ |
| 1069 | Optional second arg MINIBUF t means count the minibuffer window even\n\ |
| 1070 | if not active. MINIBUF nil or omitted means count the minibuffer iff\n\ |
| 1071 | it is active. MINIBUF neither t nor nil means not to count the\n\ |
| 1072 | minibuffer even if it is active.\n\ |
| 1073 | \n\ |
| 1074 | Several frames may share a single minibuffer; if the minibuffer\n\ |
| 1075 | counts, all windows on all frames that share that minibuffer count\n\ |
| 1076 | too. Therefore, `previous-window' can be used to iterate through\n\ |
| 1077 | the set of windows even when the minibuffer is on another frame. If\n\ |
| 1078 | the minibuffer does not count, only windows from WINDOW's frame count\n\ |
| 1079 | \n\ |
| 1080 | Optional third arg ALL-FRAMES t means include windows on all frames.\n\ |
| 1081 | ALL-FRAMES nil or omitted means cycle within the frames as specified\n\ |
| 1082 | above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\ |
| 1083 | ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\ |
| 1084 | If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\ |
| 1085 | Anything else means restrict to WINDOW's frame.\n\ |
| 1086 | \n\ |
| 1087 | If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\ |
| 1088 | `previous-window' to iterate through the entire cycle of acceptable\n\ |
| 1089 | windows, eventually ending up back at the window you started with.\n\ |
| 1090 | `next-window' traverses the same cycle, in the reverse order.") |
| 1091 | (window, minibuf, all_frames) */ |
| 1092 | |
| 1093 | |
| 1094 | DEFUN ("previous-window", Fprevious_window, Sprevious_window, 0, 3, 0, |
| 1095 | 0) |
| 1096 | (window, minibuf, all_frames) |
| 1097 | register Lisp_Object window, minibuf, all_frames; |
| 1098 | { |
| 1099 | register Lisp_Object tem; |
| 1100 | Lisp_Object start_window; |
| 1101 | |
| 1102 | if (NILP (window)) |
| 1103 | window = selected_window; |
| 1104 | else |
| 1105 | CHECK_LIVE_WINDOW (window, 0); |
| 1106 | |
| 1107 | start_window = window; |
| 1108 | |
| 1109 | /* minibuf == nil may or may not include minibuffers. |
| 1110 | Decide if it does. */ |
| 1111 | if (NILP (minibuf)) |
| 1112 | minibuf = (minibuf_level ? minibuf_window : Qlambda); |
| 1113 | else if (! EQ (minibuf, Qt)) |
| 1114 | minibuf = Qlambda; |
| 1115 | /* Now minibuf can be t => count all minibuffer windows, |
| 1116 | lambda => count none of them, |
| 1117 | or a specific minibuffer window (the active one) to count. */ |
| 1118 | |
| 1119 | /* all_frames == nil doesn't specify which frames to include. |
| 1120 | Decide which frames it includes. */ |
| 1121 | if (NILP (all_frames)) |
| 1122 | all_frames = (! EQ (minibuf, Qlambda) |
| 1123 | ? (FRAME_MINIBUF_WINDOW |
| 1124 | (XFRAME |
| 1125 | (WINDOW_FRAME |
| 1126 | (XWINDOW (window))))) |
| 1127 | : Qnil); |
| 1128 | else if (EQ (all_frames, Qvisible)) |
| 1129 | ; |
| 1130 | else if (XFASTINT (all_frames) == 0) |
| 1131 | ; |
| 1132 | else if (FRAMEP (all_frames) && ! EQ (all_frames, Fwindow_frame (window))) |
| 1133 | /* If all_frames is a frame and window arg isn't on that frame, just |
| 1134 | return the first window on the frame. */ |
| 1135 | return Fframe_first_window (all_frames); |
| 1136 | else if (! EQ (all_frames, Qt)) |
| 1137 | all_frames = Qnil; |
| 1138 | /* Now all_frames is t meaning search all frames, |
| 1139 | nil meaning search just current frame, |
| 1140 | visible meaning search just visible frames, |
| 1141 | 0 meaning search visible and iconified frames, |
| 1142 | or a window, meaning search the frame that window belongs to. */ |
| 1143 | |
| 1144 | /* Do this loop at least once, to get the previous window, and perhaps |
| 1145 | again, if we hit the minibuffer and that is not acceptable. */ |
| 1146 | do |
| 1147 | { |
| 1148 | /* Find a window that actually has a previous one. This loop |
| 1149 | climbs up the tree. */ |
| 1150 | while (tem = XWINDOW (window)->prev, NILP (tem)) |
| 1151 | if (tem = XWINDOW (window)->parent, !NILP (tem)) |
| 1152 | window = tem; |
| 1153 | else |
| 1154 | { |
| 1155 | /* We have found the top window on the frame. |
| 1156 | Which frames are acceptable? */ |
| 1157 | tem = WINDOW_FRAME (XWINDOW (window)); |
| 1158 | if (! NILP (all_frames)) |
| 1159 | /* It's actually important that we use prev_frame here, |
| 1160 | rather than next_frame. All the windows acceptable |
| 1161 | according to the given parameters should form a ring; |
| 1162 | Fnext_window and Fprevious_window should go back and |
| 1163 | forth around the ring. If we use next_frame here, |
| 1164 | then Fnext_window and Fprevious_window take different |
| 1165 | paths through the set of acceptable windows. |
| 1166 | window_loop assumes that these `ring' requirement are |
| 1167 | met. */ |
| 1168 | { |
| 1169 | Lisp_Object tem1; |
| 1170 | |
| 1171 | tem1 = tem; |
| 1172 | tem = prev_frame (tem, all_frames); |
| 1173 | /* In the case where the minibuffer is active, |
| 1174 | and we include its frame as well as the selected one, |
| 1175 | next_frame may get stuck in that frame. |
| 1176 | If that happens, go back to the selected frame |
| 1177 | so we can complete the cycle. */ |
| 1178 | if (EQ (tem, tem1)) |
| 1179 | XSETFRAME (tem, selected_frame); |
| 1180 | } |
| 1181 | /* If this frame has a minibuffer, find that window first, |
| 1182 | because it is conceptually the last window in that frame. */ |
| 1183 | if (FRAME_HAS_MINIBUF_P (XFRAME (tem))) |
| 1184 | tem = FRAME_MINIBUF_WINDOW (XFRAME (tem)); |
| 1185 | else |
| 1186 | tem = FRAME_ROOT_WINDOW (XFRAME (tem)); |
| 1187 | |
| 1188 | break; |
| 1189 | } |
| 1190 | |
| 1191 | window = tem; |
| 1192 | /* If we're in a combination window, find its last child and |
| 1193 | recurse on that. Otherwise, we've found the window we want. */ |
| 1194 | while (1) |
| 1195 | { |
| 1196 | if (!NILP (XWINDOW (window)->hchild)) |
| 1197 | window = XWINDOW (window)->hchild; |
| 1198 | else if (!NILP (XWINDOW (window)->vchild)) |
| 1199 | window = XWINDOW (window)->vchild; |
| 1200 | else break; |
| 1201 | while (tem = XWINDOW (window)->next, !NILP (tem)) |
| 1202 | window = tem; |
| 1203 | } |
| 1204 | } |
| 1205 | /* Which windows are acceptable? |
| 1206 | Exit the loop and accept this window if |
| 1207 | this isn't a minibuffer window, |
| 1208 | or we're accepting all minibuffer windows, |
| 1209 | or this is the active minibuffer and we are accepting that one, or |
| 1210 | we've come all the way around and we're back at the original window. */ |
| 1211 | while (MINI_WINDOW_P (XWINDOW (window)) |
| 1212 | && ! EQ (minibuf, Qt) |
| 1213 | && ! EQ (minibuf, window) |
| 1214 | && ! EQ (window, start_window)); |
| 1215 | |
| 1216 | return window; |
| 1217 | } |
| 1218 | |
| 1219 | DEFUN ("other-window", Fother_window, Sother_window, 1, 2, "p", |
| 1220 | "Select the ARG'th different window on this frame.\n\ |
| 1221 | All windows on current frame are arranged in a cyclic order.\n\ |
| 1222 | This command selects the window ARG steps away in that order.\n\ |
| 1223 | A negative ARG moves in the opposite order. If the optional second\n\ |
| 1224 | argument ALL_FRAMES is non-nil, cycle through all frames.") |
| 1225 | (arg, all_frames) |
| 1226 | register Lisp_Object arg, all_frames; |
| 1227 | { |
| 1228 | register int i; |
| 1229 | register Lisp_Object w; |
| 1230 | |
| 1231 | CHECK_NUMBER (arg, 0); |
| 1232 | w = selected_window; |
| 1233 | i = XINT (arg); |
| 1234 | |
| 1235 | while (i > 0) |
| 1236 | { |
| 1237 | w = Fnext_window (w, Qnil, all_frames); |
| 1238 | i--; |
| 1239 | } |
| 1240 | while (i < 0) |
| 1241 | { |
| 1242 | w = Fprevious_window (w, Qnil, all_frames); |
| 1243 | i++; |
| 1244 | } |
| 1245 | Fselect_window (w); |
| 1246 | return Qnil; |
| 1247 | } |
| 1248 | \f |
| 1249 | /* Look at all windows, performing an operation specified by TYPE |
| 1250 | with argument OBJ. |
| 1251 | If FRAMES is Qt, look at all frames; |
| 1252 | Qnil, look at just the selected frame; |
| 1253 | Qvisible, look at visible frames; |
| 1254 | a frame, just look at windows on that frame. |
| 1255 | If MINI is non-zero, perform the operation on minibuffer windows too. |
| 1256 | */ |
| 1257 | |
| 1258 | enum window_loop |
| 1259 | { |
| 1260 | WINDOW_LOOP_UNUSED, |
| 1261 | GET_BUFFER_WINDOW, /* Arg is buffer */ |
| 1262 | GET_LRU_WINDOW, /* Arg is t for full-width windows only */ |
| 1263 | DELETE_OTHER_WINDOWS, /* Arg is window not to delete */ |
| 1264 | DELETE_BUFFER_WINDOWS, /* Arg is buffer */ |
| 1265 | GET_LARGEST_WINDOW, |
| 1266 | UNSHOW_BUFFER /* Arg is buffer */ |
| 1267 | }; |
| 1268 | |
| 1269 | static Lisp_Object |
| 1270 | window_loop (type, obj, mini, frames) |
| 1271 | enum window_loop type; |
| 1272 | register Lisp_Object obj, frames; |
| 1273 | int mini; |
| 1274 | { |
| 1275 | register Lisp_Object w; |
| 1276 | register Lisp_Object best_window; |
| 1277 | register Lisp_Object next_window; |
| 1278 | register Lisp_Object last_window; |
| 1279 | FRAME_PTR frame; |
| 1280 | Lisp_Object frame_arg; |
| 1281 | frame_arg = Qt; |
| 1282 | |
| 1283 | /* If we're only looping through windows on a particular frame, |
| 1284 | frame points to that frame. If we're looping through windows |
| 1285 | on all frames, frame is 0. */ |
| 1286 | if (FRAMEP (frames)) |
| 1287 | frame = XFRAME (frames); |
| 1288 | else if (NILP (frames)) |
| 1289 | frame = selected_frame; |
| 1290 | else |
| 1291 | frame = 0; |
| 1292 | if (frame) |
| 1293 | frame_arg = Qlambda; |
| 1294 | else if (XFASTINT (frames) == 0) |
| 1295 | frame_arg = frames; |
| 1296 | else if (EQ (frames, Qvisible)) |
| 1297 | frame_arg = frames; |
| 1298 | |
| 1299 | /* frame_arg is Qlambda to stick to one frame, |
| 1300 | Qvisible to consider all visible frames, |
| 1301 | or Qt otherwise. */ |
| 1302 | |
| 1303 | /* Pick a window to start with. */ |
| 1304 | if (WINDOWP (obj)) |
| 1305 | w = obj; |
| 1306 | else if (frame) |
| 1307 | w = FRAME_SELECTED_WINDOW (frame); |
| 1308 | else |
| 1309 | w = FRAME_SELECTED_WINDOW (selected_frame); |
| 1310 | |
| 1311 | /* Figure out the last window we're going to mess with. Since |
| 1312 | Fnext_window, given the same options, is guaranteed to go in a |
| 1313 | ring, we can just use Fprevious_window to find the last one. |
| 1314 | |
| 1315 | We can't just wait until we hit the first window again, because |
| 1316 | it might be deleted. */ |
| 1317 | |
| 1318 | last_window = Fprevious_window (w, mini ? Qt : Qnil, frame_arg); |
| 1319 | |
| 1320 | best_window = Qnil; |
| 1321 | for (;;) |
| 1322 | { |
| 1323 | FRAME_PTR w_frame = XFRAME (WINDOW_FRAME (XWINDOW (w))); |
| 1324 | |
| 1325 | /* Pick the next window now, since some operations will delete |
| 1326 | the current window. */ |
| 1327 | next_window = Fnext_window (w, mini ? Qt : Qnil, frame_arg); |
| 1328 | |
| 1329 | /* Note that we do not pay attention here to whether |
| 1330 | the frame is visible, since Fnext_window skips non-visible frames |
| 1331 | if that is desired, under the control of frame_arg. */ |
| 1332 | if (! MINI_WINDOW_P (XWINDOW (w)) |
| 1333 | || (mini && minibuf_level > 0)) |
| 1334 | switch (type) |
| 1335 | { |
| 1336 | case GET_BUFFER_WINDOW: |
| 1337 | if (XBUFFER (XWINDOW (w)->buffer) == XBUFFER (obj) |
| 1338 | /* Don't find any minibuffer window |
| 1339 | except the one that is currently in use. */ |
| 1340 | && (MINI_WINDOW_P (XWINDOW (w)) |
| 1341 | ? EQ (w, minibuf_window) : 1)) |
| 1342 | return w; |
| 1343 | break; |
| 1344 | |
| 1345 | case GET_LRU_WINDOW: |
| 1346 | /* t as arg means consider only full-width windows */ |
| 1347 | if (!NILP (obj) && !WINDOW_FULL_WIDTH_P (XWINDOW (w))) |
| 1348 | break; |
| 1349 | /* Ignore dedicated windows and minibuffers. */ |
| 1350 | if (MINI_WINDOW_P (XWINDOW (w)) |
| 1351 | || !NILP (XWINDOW (w)->dedicated)) |
| 1352 | break; |
| 1353 | if (NILP (best_window) |
| 1354 | || (XFASTINT (XWINDOW (best_window)->use_time) |
| 1355 | > XFASTINT (XWINDOW (w)->use_time))) |
| 1356 | best_window = w; |
| 1357 | break; |
| 1358 | |
| 1359 | case DELETE_OTHER_WINDOWS: |
| 1360 | if (XWINDOW (w) != XWINDOW (obj)) |
| 1361 | Fdelete_window (w); |
| 1362 | break; |
| 1363 | |
| 1364 | case DELETE_BUFFER_WINDOWS: |
| 1365 | if (EQ (XWINDOW (w)->buffer, obj)) |
| 1366 | { |
| 1367 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (w))); |
| 1368 | |
| 1369 | /* If this window is dedicated, and in a frame of its own, |
| 1370 | kill the frame. */ |
| 1371 | if (EQ (w, FRAME_ROOT_WINDOW (f)) |
| 1372 | && !NILP (XWINDOW (w)->dedicated) |
| 1373 | && other_visible_frames (f)) |
| 1374 | { |
| 1375 | /* Skip the other windows on this frame. |
| 1376 | There might be one, the minibuffer! */ |
| 1377 | if (! EQ (w, last_window)) |
| 1378 | while (f == XFRAME (WINDOW_FRAME (XWINDOW (next_window)))) |
| 1379 | { |
| 1380 | /* As we go, check for the end of the loop. |
| 1381 | We mustn't start going around a second time. */ |
| 1382 | if (EQ (next_window, last_window)) |
| 1383 | { |
| 1384 | last_window = w; |
| 1385 | break; |
| 1386 | } |
| 1387 | next_window = Fnext_window (next_window, |
| 1388 | mini ? Qt : Qnil, |
| 1389 | frame_arg); |
| 1390 | } |
| 1391 | /* Now we can safely delete the frame. */ |
| 1392 | Fdelete_frame (WINDOW_FRAME (XWINDOW (w)), Qnil); |
| 1393 | } |
| 1394 | else |
| 1395 | /* If we're deleting the buffer displayed in the only window |
| 1396 | on the frame, find a new buffer to display there. */ |
| 1397 | if (NILP (XWINDOW (w)->parent)) |
| 1398 | { |
| 1399 | Lisp_Object new_buffer; |
| 1400 | new_buffer = Fother_buffer (obj, Qnil); |
| 1401 | if (NILP (new_buffer)) |
| 1402 | new_buffer |
| 1403 | = Fget_buffer_create (build_string ("*scratch*")); |
| 1404 | Fset_window_buffer (w, new_buffer); |
| 1405 | if (EQ (w, selected_window)) |
| 1406 | Fset_buffer (XWINDOW (w)->buffer); |
| 1407 | } |
| 1408 | else |
| 1409 | Fdelete_window (w); |
| 1410 | } |
| 1411 | break; |
| 1412 | |
| 1413 | case GET_LARGEST_WINDOW: |
| 1414 | /* Ignore dedicated windows and minibuffers. */ |
| 1415 | if (MINI_WINDOW_P (XWINDOW (w)) |
| 1416 | || !NILP (XWINDOW (w)->dedicated)) |
| 1417 | break; |
| 1418 | { |
| 1419 | struct window *best_window_ptr = XWINDOW (best_window); |
| 1420 | struct window *w_ptr = XWINDOW (w); |
| 1421 | if (NILP (best_window) |
| 1422 | || (XFASTINT (w_ptr->height) * XFASTINT (w_ptr->width) |
| 1423 | > (XFASTINT (best_window_ptr->height) |
| 1424 | * XFASTINT (best_window_ptr->width)))) |
| 1425 | best_window = w; |
| 1426 | } |
| 1427 | break; |
| 1428 | |
| 1429 | case UNSHOW_BUFFER: |
| 1430 | if (EQ (XWINDOW (w)->buffer, obj)) |
| 1431 | { |
| 1432 | /* Find another buffer to show in this window. */ |
| 1433 | Lisp_Object another_buffer; |
| 1434 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (w))); |
| 1435 | another_buffer = Fother_buffer (obj, Qnil); |
| 1436 | if (NILP (another_buffer)) |
| 1437 | another_buffer |
| 1438 | = Fget_buffer_create (build_string ("*scratch*")); |
| 1439 | /* If this window is dedicated, and in a frame of its own, |
| 1440 | kill the frame. */ |
| 1441 | if (EQ (w, FRAME_ROOT_WINDOW (f)) |
| 1442 | && !NILP (XWINDOW (w)->dedicated) |
| 1443 | && other_visible_frames (f)) |
| 1444 | { |
| 1445 | /* Skip the other windows on this frame. |
| 1446 | There might be one, the minibuffer! */ |
| 1447 | if (! EQ (w, last_window)) |
| 1448 | while (f == XFRAME (WINDOW_FRAME (XWINDOW (next_window)))) |
| 1449 | { |
| 1450 | /* As we go, check for the end of the loop. |
| 1451 | We mustn't start going around a second time. */ |
| 1452 | if (EQ (next_window, last_window)) |
| 1453 | { |
| 1454 | last_window = w; |
| 1455 | break; |
| 1456 | } |
| 1457 | next_window = Fnext_window (next_window, |
| 1458 | mini ? Qt : Qnil, |
| 1459 | frame_arg); |
| 1460 | } |
| 1461 | /* Now we can safely delete the frame. */ |
| 1462 | Fdelete_frame (WINDOW_FRAME (XWINDOW (w)), Qnil); |
| 1463 | } |
| 1464 | else |
| 1465 | { |
| 1466 | /* Otherwise show a different buffer in the window. */ |
| 1467 | XWINDOW (w)->dedicated = Qnil; |
| 1468 | Fset_window_buffer (w, another_buffer); |
| 1469 | if (EQ (w, selected_window)) |
| 1470 | Fset_buffer (XWINDOW (w)->buffer); |
| 1471 | } |
| 1472 | } |
| 1473 | break; |
| 1474 | } |
| 1475 | |
| 1476 | if (EQ (w, last_window)) |
| 1477 | break; |
| 1478 | |
| 1479 | w = next_window; |
| 1480 | } |
| 1481 | |
| 1482 | return best_window; |
| 1483 | } |
| 1484 | |
| 1485 | DEFUN ("get-lru-window", Fget_lru_window, Sget_lru_window, 0, 1, 0, |
| 1486 | "Return the window least recently selected or used for display.\n\ |
| 1487 | If optional argument FRAME is `visible', search all visible frames.\n\ |
| 1488 | If FRAME is 0, search all visible and iconified frames.\n\ |
| 1489 | If FRAME is t, search all frames.\n\ |
| 1490 | If FRAME is nil, search only the selected frame.\n\ |
| 1491 | If FRAME is a frame, search only that frame.") |
| 1492 | (frame) |
| 1493 | Lisp_Object frame; |
| 1494 | { |
| 1495 | register Lisp_Object w; |
| 1496 | /* First try for a window that is full-width */ |
| 1497 | w = window_loop (GET_LRU_WINDOW, Qt, 0, frame); |
| 1498 | if (!NILP (w) && !EQ (w, selected_window)) |
| 1499 | return w; |
| 1500 | /* If none of them, try the rest */ |
| 1501 | return window_loop (GET_LRU_WINDOW, Qnil, 0, frame); |
| 1502 | } |
| 1503 | |
| 1504 | DEFUN ("get-largest-window", Fget_largest_window, Sget_largest_window, 0, 1, 0, |
| 1505 | "Return the largest window in area.\n\ |
| 1506 | If optional argument FRAME is `visible', search all visible frames.\n\ |
| 1507 | If FRAME is 0, search all visible and iconified frames.\n\ |
| 1508 | If FRAME is t, search all frames.\n\ |
| 1509 | If FRAME is nil, search only the selected frame.\n\ |
| 1510 | If FRAME is a frame, search only that frame.") |
| 1511 | (frame) |
| 1512 | Lisp_Object frame; |
| 1513 | { |
| 1514 | return window_loop (GET_LARGEST_WINDOW, Qnil, 0, |
| 1515 | frame); |
| 1516 | } |
| 1517 | |
| 1518 | DEFUN ("get-buffer-window", Fget_buffer_window, Sget_buffer_window, 1, 2, 0, |
| 1519 | "Return a window currently displaying BUFFER, or nil if none.\n\ |
| 1520 | If optional argument FRAME is `visible', search all visible frames.\n\ |
| 1521 | If optional argument FRAME is 0, search all visible and iconified frames.\n\ |
| 1522 | If FRAME is t, search all frames.\n\ |
| 1523 | If FRAME is nil, search only the selected frame.\n\ |
| 1524 | If FRAME is a frame, search only that frame.") |
| 1525 | (buffer, frame) |
| 1526 | Lisp_Object buffer, frame; |
| 1527 | { |
| 1528 | buffer = Fget_buffer (buffer); |
| 1529 | if (BUFFERP (buffer)) |
| 1530 | return window_loop (GET_BUFFER_WINDOW, buffer, 1, frame); |
| 1531 | else |
| 1532 | return Qnil; |
| 1533 | } |
| 1534 | |
| 1535 | DEFUN ("delete-other-windows", Fdelete_other_windows, Sdelete_other_windows, |
| 1536 | 0, 1, "", |
| 1537 | "Make WINDOW (or the selected window) fill its frame.\n\ |
| 1538 | Only the frame WINDOW is on is affected.\n\ |
| 1539 | This function tries to reduce display jumps\n\ |
| 1540 | by keeping the text previously visible in WINDOW\n\ |
| 1541 | in the same place on the frame. Doing this depends on\n\ |
| 1542 | the value of (window-start WINDOW), so if calling this function\n\ |
| 1543 | in a program gives strange scrolling, make sure the window-start\n\ |
| 1544 | value is reasonable when this function is called.") |
| 1545 | (window) |
| 1546 | Lisp_Object window; |
| 1547 | { |
| 1548 | struct window *w; |
| 1549 | int startpos; |
| 1550 | int top; |
| 1551 | |
| 1552 | if (NILP (window)) |
| 1553 | window = selected_window; |
| 1554 | else |
| 1555 | CHECK_LIVE_WINDOW (window, 0); |
| 1556 | |
| 1557 | w = XWINDOW (window); |
| 1558 | |
| 1559 | startpos = marker_position (w->start); |
| 1560 | top = XFASTINT (w->top) - FRAME_MENU_BAR_LINES (XFRAME (WINDOW_FRAME (w))); |
| 1561 | |
| 1562 | if (MINI_WINDOW_P (w) && top > 0) |
| 1563 | error ("Can't expand minibuffer to full frame"); |
| 1564 | |
| 1565 | window_loop (DELETE_OTHER_WINDOWS, window, 0, WINDOW_FRAME (w)); |
| 1566 | |
| 1567 | /* Try to minimize scrolling, by setting the window start to the point |
| 1568 | will cause the text at the old window start to be at the same place |
| 1569 | on the frame. But don't try to do this if the window start is |
| 1570 | outside the visible portion (as might happen when the display is |
| 1571 | not current, due to typeahead). */ |
| 1572 | if (startpos >= BUF_BEGV (XBUFFER (w->buffer)) |
| 1573 | && startpos <= BUF_ZV (XBUFFER (w->buffer))) |
| 1574 | { |
| 1575 | struct position pos; |
| 1576 | struct buffer *obuf = current_buffer; |
| 1577 | |
| 1578 | Fset_buffer (w->buffer); |
| 1579 | /* This computation used to temporarily move point, but that can |
| 1580 | have unwanted side effects due to text properties. */ |
| 1581 | pos = *vmotion (startpos, -top, w); |
| 1582 | |
| 1583 | Fset_marker (w->start, make_number (pos.bufpos), w->buffer); |
| 1584 | w->start_at_line_beg = ((pos.bufpos == BEGV |
| 1585 | || FETCH_BYTE (pos.bufpos - 1) == '\n') ? Qt |
| 1586 | : Qnil); |
| 1587 | /* We need to do this, so that the window-scroll-functions |
| 1588 | get called. */ |
| 1589 | w->optional_new_start = Qt; |
| 1590 | |
| 1591 | set_buffer_internal (obuf); |
| 1592 | } |
| 1593 | return Qnil; |
| 1594 | } |
| 1595 | |
| 1596 | DEFUN ("delete-windows-on", Fdelete_windows_on, Sdelete_windows_on, |
| 1597 | 1, 2, "bDelete windows on (buffer): ", |
| 1598 | "Delete all windows showing BUFFER.\n\ |
| 1599 | Optional second argument FRAME controls which frames are affected.\n\ |
| 1600 | If nil or omitted, delete all windows showing BUFFER in any frame.\n\ |
| 1601 | If t, delete only windows showing BUFFER in the selected frame.\n\ |
| 1602 | If `visible', delete all windows showing BUFFER in any visible frame.\n\ |
| 1603 | If a frame, delete only windows showing BUFFER in that frame.") |
| 1604 | (buffer, frame) |
| 1605 | Lisp_Object buffer, frame; |
| 1606 | { |
| 1607 | /* FRAME uses t and nil to mean the opposite of what window_loop |
| 1608 | expects. */ |
| 1609 | if (! FRAMEP (frame)) |
| 1610 | frame = NILP (frame) ? Qt : Qnil; |
| 1611 | |
| 1612 | if (!NILP (buffer)) |
| 1613 | { |
| 1614 | buffer = Fget_buffer (buffer); |
| 1615 | CHECK_BUFFER (buffer, 0); |
| 1616 | window_loop (DELETE_BUFFER_WINDOWS, buffer, 0, frame); |
| 1617 | } |
| 1618 | return Qnil; |
| 1619 | } |
| 1620 | |
| 1621 | DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows, |
| 1622 | Sreplace_buffer_in_windows, |
| 1623 | 1, 1, "bReplace buffer in windows: ", |
| 1624 | "Replace BUFFER with some other buffer in all windows showing it.") |
| 1625 | (buffer) |
| 1626 | Lisp_Object buffer; |
| 1627 | { |
| 1628 | if (!NILP (buffer)) |
| 1629 | { |
| 1630 | buffer = Fget_buffer (buffer); |
| 1631 | CHECK_BUFFER (buffer, 0); |
| 1632 | window_loop (UNSHOW_BUFFER, buffer, 0, Qt); |
| 1633 | } |
| 1634 | return Qnil; |
| 1635 | } |
| 1636 | |
| 1637 | /* Replace BUFFER with some other buffer in all windows |
| 1638 | of all frames, even those on other keyboards. */ |
| 1639 | |
| 1640 | void |
| 1641 | replace_buffer_in_all_windows (buffer) |
| 1642 | Lisp_Object buffer; |
| 1643 | { |
| 1644 | #ifdef MULTI_KBOARD |
| 1645 | Lisp_Object tail, frame; |
| 1646 | |
| 1647 | /* A single call to window_loop won't do the job |
| 1648 | because it only considers frames on the current keyboard. |
| 1649 | So loop manually over frames, and handle each one. */ |
| 1650 | FOR_EACH_FRAME (tail, frame) |
| 1651 | window_loop (UNSHOW_BUFFER, buffer, 0, frame); |
| 1652 | #else |
| 1653 | window_loop (UNSHOW_BUFFER, buffer, 0, Qt); |
| 1654 | #endif |
| 1655 | } |
| 1656 | \f |
| 1657 | /* Set the height of WINDOW and all its inferiors. */ |
| 1658 | |
| 1659 | /* The smallest acceptable dimensions for a window. Anything smaller |
| 1660 | might crash Emacs. */ |
| 1661 | #define MIN_SAFE_WINDOW_WIDTH (2) |
| 1662 | #define MIN_SAFE_WINDOW_HEIGHT (2) |
| 1663 | |
| 1664 | /* Make sure that window_min_height and window_min_width are |
| 1665 | not too small; if they are, set them to safe minima. */ |
| 1666 | |
| 1667 | static void |
| 1668 | check_min_window_sizes () |
| 1669 | { |
| 1670 | /* Smaller values might permit a crash. */ |
| 1671 | if (window_min_width < MIN_SAFE_WINDOW_WIDTH) |
| 1672 | window_min_width = MIN_SAFE_WINDOW_WIDTH; |
| 1673 | if (window_min_height < MIN_SAFE_WINDOW_HEIGHT) |
| 1674 | window_min_height = MIN_SAFE_WINDOW_HEIGHT; |
| 1675 | } |
| 1676 | |
| 1677 | /* If *ROWS or *COLS are too small a size for FRAME, set them to the |
| 1678 | minimum allowable size. */ |
| 1679 | void |
| 1680 | check_frame_size (frame, rows, cols) |
| 1681 | FRAME_PTR frame; |
| 1682 | int *rows, *cols; |
| 1683 | { |
| 1684 | /* For height, we have to see: |
| 1685 | whether the frame has a minibuffer, |
| 1686 | whether it wants a mode line, and |
| 1687 | whether it has a menu bar. */ |
| 1688 | int min_height = |
| 1689 | (FRAME_MINIBUF_ONLY_P (frame) ? MIN_SAFE_WINDOW_HEIGHT - 1 |
| 1690 | : (! FRAME_HAS_MINIBUF_P (frame)) ? MIN_SAFE_WINDOW_HEIGHT |
| 1691 | : 2 * MIN_SAFE_WINDOW_HEIGHT - 1); |
| 1692 | if (FRAME_MENU_BAR_LINES (frame) > 0) |
| 1693 | min_height += FRAME_MENU_BAR_LINES (frame); |
| 1694 | |
| 1695 | if (*rows < min_height) |
| 1696 | *rows = min_height; |
| 1697 | if (*cols < MIN_SAFE_WINDOW_WIDTH) |
| 1698 | *cols = MIN_SAFE_WINDOW_WIDTH; |
| 1699 | } |
| 1700 | |
| 1701 | /* Normally the window is deleted if it gets too small. |
| 1702 | nodelete nonzero means do not do this. |
| 1703 | (The caller should check later and do so if appropriate) */ |
| 1704 | |
| 1705 | set_window_height (window, height, nodelete) |
| 1706 | Lisp_Object window; |
| 1707 | int height; |
| 1708 | int nodelete; |
| 1709 | { |
| 1710 | register struct window *w = XWINDOW (window); |
| 1711 | register struct window *c; |
| 1712 | int oheight = XFASTINT (w->height); |
| 1713 | int top, pos, lastbot, opos, lastobot; |
| 1714 | Lisp_Object child; |
| 1715 | |
| 1716 | check_min_window_sizes (); |
| 1717 | |
| 1718 | if (!nodelete |
| 1719 | && ! NILP (w->parent) |
| 1720 | && height < window_min_height) |
| 1721 | { |
| 1722 | Fdelete_window (window); |
| 1723 | return; |
| 1724 | } |
| 1725 | |
| 1726 | XSETFASTINT (w->last_modified, 0); |
| 1727 | XSETFASTINT (w->last_overlay_modified, 0); |
| 1728 | windows_or_buffers_changed++; |
| 1729 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1; |
| 1730 | |
| 1731 | XSETFASTINT (w->height, height); |
| 1732 | if (!NILP (w->hchild)) |
| 1733 | { |
| 1734 | for (child = w->hchild; !NILP (child); child = XWINDOW (child)->next) |
| 1735 | { |
| 1736 | XWINDOW (child)->top = w->top; |
| 1737 | set_window_height (child, height, nodelete); |
| 1738 | } |
| 1739 | } |
| 1740 | else if (!NILP (w->vchild)) |
| 1741 | { |
| 1742 | lastbot = top = XFASTINT (w->top); |
| 1743 | lastobot = 0; |
| 1744 | for (child = w->vchild; !NILP (child); child = c->next) |
| 1745 | { |
| 1746 | c = XWINDOW (child); |
| 1747 | |
| 1748 | opos = lastobot + XFASTINT (c->height); |
| 1749 | |
| 1750 | XSETFASTINT (c->top, lastbot); |
| 1751 | |
| 1752 | pos = (((opos * height) << 1) + oheight) / (oheight << 1); |
| 1753 | |
| 1754 | /* Avoid confusion: inhibit deletion of child if becomes too small */ |
| 1755 | set_window_height (child, pos + top - lastbot, 1); |
| 1756 | |
| 1757 | /* Now advance child to next window, |
| 1758 | and set lastbot if child was not just deleted. */ |
| 1759 | lastbot = pos + top; |
| 1760 | lastobot = opos; |
| 1761 | } |
| 1762 | /* Now delete any children that became too small. */ |
| 1763 | if (!nodelete) |
| 1764 | for (child = w->vchild; !NILP (child); child = XWINDOW (child)->next) |
| 1765 | { |
| 1766 | set_window_height (child, XINT (XWINDOW (child)->height), 0); |
| 1767 | } |
| 1768 | } |
| 1769 | } |
| 1770 | |
| 1771 | /* Recursively set width of WINDOW and its inferiors. */ |
| 1772 | |
| 1773 | set_window_width (window, width, nodelete) |
| 1774 | Lisp_Object window; |
| 1775 | int width; |
| 1776 | int nodelete; |
| 1777 | { |
| 1778 | register struct window *w = XWINDOW (window); |
| 1779 | register struct window *c; |
| 1780 | int owidth = XFASTINT (w->width); |
| 1781 | int left, pos, lastright, opos, lastoright; |
| 1782 | Lisp_Object child; |
| 1783 | |
| 1784 | if (!nodelete && width < window_min_width && !NILP (w->parent)) |
| 1785 | { |
| 1786 | Fdelete_window (window); |
| 1787 | return; |
| 1788 | } |
| 1789 | |
| 1790 | XSETFASTINT (w->last_modified, 0); |
| 1791 | XSETFASTINT (w->last_overlay_modified, 0); |
| 1792 | windows_or_buffers_changed++; |
| 1793 | FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1; |
| 1794 | |
| 1795 | XSETFASTINT (w->width, width); |
| 1796 | if (!NILP (w->vchild)) |
| 1797 | { |
| 1798 | for (child = w->vchild; !NILP (child); child = XWINDOW (child)->next) |
| 1799 | { |
| 1800 | XWINDOW (child)->left = w->left; |
| 1801 | set_window_width (child, width, nodelete); |
| 1802 | } |
| 1803 | } |
| 1804 | else if (!NILP (w->hchild)) |
| 1805 | { |
| 1806 | lastright = left = XFASTINT (w->left); |
| 1807 | lastoright = 0; |
| 1808 | for (child = w->hchild; !NILP (child); child = c->next) |
| 1809 | { |
| 1810 | c = XWINDOW (child); |
| 1811 | |
| 1812 | opos = lastoright + XFASTINT (c->width); |
| 1813 | |
| 1814 | XSETFASTINT (c->left, lastright); |
| 1815 | |
| 1816 | pos = (((opos * width) << 1) + owidth) / (owidth << 1); |
| 1817 | |
| 1818 | /* Inhibit deletion for becoming too small */ |
| 1819 | set_window_width (child, pos + left - lastright, 1); |
| 1820 | |
| 1821 | /* Now advance child to next window, |
| 1822 | and set lastright if child was not just deleted. */ |
| 1823 | lastright = pos + left, lastoright = opos; |
| 1824 | } |
| 1825 | /* Delete children that became too small */ |
| 1826 | if (!nodelete) |
| 1827 | for (child = w->hchild; !NILP (child); child = XWINDOW (child)->next) |
| 1828 | { |
| 1829 | set_window_width (child, XINT (XWINDOW (child)->width), 0); |
| 1830 | } |
| 1831 | } |
| 1832 | } |
| 1833 | \f |
| 1834 | int window_select_count; |
| 1835 | |
| 1836 | Lisp_Object |
| 1837 | Fset_window_buffer_unwind (obuf) |
| 1838 | Lisp_Object obuf; |
| 1839 | { |
| 1840 | Fset_buffer (obuf); |
| 1841 | return Qnil; |
| 1842 | } |
| 1843 | |
| 1844 | DEFUN ("set-window-buffer", Fset_window_buffer, Sset_window_buffer, 2, 2, 0, |
| 1845 | "Make WINDOW display BUFFER as its contents.\n\ |
| 1846 | BUFFER can be a buffer or buffer name.") |
| 1847 | (window, buffer) |
| 1848 | register Lisp_Object window, buffer; |
| 1849 | { |
| 1850 | register Lisp_Object tem; |
| 1851 | register struct window *w = decode_window (window); |
| 1852 | int count = specpdl_ptr - specpdl; |
| 1853 | |
| 1854 | buffer = Fget_buffer (buffer); |
| 1855 | CHECK_BUFFER (buffer, 1); |
| 1856 | |
| 1857 | if (NILP (XBUFFER (buffer)->name)) |
| 1858 | error ("Attempt to display deleted buffer"); |
| 1859 | |
| 1860 | tem = w->buffer; |
| 1861 | if (NILP (tem)) |
| 1862 | error ("Window is deleted"); |
| 1863 | else if (! EQ (tem, Qt)) /* w->buffer is t when the window |
| 1864 | is first being set up. */ |
| 1865 | { |
| 1866 | if (!NILP (w->dedicated) && !EQ (tem, buffer)) |
| 1867 | error ("Window is dedicated to `%s'", |
| 1868 | XSTRING (XBUFFER (tem)->name)->data); |
| 1869 | |
| 1870 | unshow_buffer (w); |
| 1871 | } |
| 1872 | |
| 1873 | w->buffer = buffer; |
| 1874 | |
| 1875 | if (EQ (window, selected_window)) |
| 1876 | XBUFFER (w->buffer)->last_selected_window = window; |
| 1877 | if (INTEGERP (XBUFFER (buffer)->display_count)) |
| 1878 | XSETINT (XBUFFER (buffer)->display_count, |
| 1879 | XBUFFER (buffer)->display_count + 1); |
| 1880 | |
| 1881 | XSETFASTINT (w->window_end_pos, 0); |
| 1882 | w->window_end_valid = Qnil; |
| 1883 | XSETFASTINT (w->hscroll, 0); |
| 1884 | Fset_marker (w->pointm, |
| 1885 | make_number (BUF_PT (XBUFFER (buffer))), |
| 1886 | buffer); |
| 1887 | set_marker_restricted (w->start, |
| 1888 | make_number (XBUFFER (buffer)->last_window_start), |
| 1889 | buffer); |
| 1890 | w->start_at_line_beg = Qnil; |
| 1891 | w->force_start = Qnil; |
| 1892 | XSETFASTINT (w->last_modified, 0); |
| 1893 | XSETFASTINT (w->last_overlay_modified, 0); |
| 1894 | windows_or_buffers_changed++; |
| 1895 | |
| 1896 | /* We must select BUFFER for running the window-scroll-functions. |
| 1897 | If WINDOW is selected, switch permanently. |
| 1898 | Otherwise, switch but go back to the ambient buffer afterward. */ |
| 1899 | if (EQ (window, selected_window)) |
| 1900 | Fset_buffer (buffer); |
| 1901 | /* We can't check ! NILP (Vwindow_scroll_functions) here |
| 1902 | because that might itself be a local variable. */ |
| 1903 | else if (window_initialized) |
| 1904 | { |
| 1905 | record_unwind_protect (Fset_window_buffer_unwind, Fcurrent_buffer ()); |
| 1906 | Fset_buffer (buffer); |
| 1907 | } |
| 1908 | |
| 1909 | if (! NILP (Vwindow_scroll_functions)) |
| 1910 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
| 1911 | Fmarker_position (w->start)); |
| 1912 | |
| 1913 | unbind_to (count, Qnil); |
| 1914 | |
| 1915 | return Qnil; |
| 1916 | } |
| 1917 | |
| 1918 | DEFUN ("select-window", Fselect_window, Sselect_window, 1, 1, 0, |
| 1919 | "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\ |
| 1920 | The main editor command loop selects the buffer of the selected window\n\ |
| 1921 | before each command.") |
| 1922 | (window) |
| 1923 | register Lisp_Object window; |
| 1924 | { |
| 1925 | register struct window *w; |
| 1926 | register struct window *ow = XWINDOW (selected_window); |
| 1927 | |
| 1928 | CHECK_LIVE_WINDOW (window, 0); |
| 1929 | |
| 1930 | w = XWINDOW (window); |
| 1931 | |
| 1932 | if (NILP (w->buffer)) |
| 1933 | error ("Trying to select deleted window or non-leaf window"); |
| 1934 | |
| 1935 | XSETFASTINT (w->use_time, ++window_select_count); |
| 1936 | if (EQ (window, selected_window)) |
| 1937 | return window; |
| 1938 | |
| 1939 | Fset_marker (ow->pointm, make_number (BUF_PT (XBUFFER (ow->buffer))), |
| 1940 | ow->buffer); |
| 1941 | |
| 1942 | selected_window = window; |
| 1943 | if (XFRAME (WINDOW_FRAME (w)) != selected_frame) |
| 1944 | { |
| 1945 | XFRAME (WINDOW_FRAME (w))->selected_window = window; |
| 1946 | /* Use this rather than Fhandle_switch_frame |
| 1947 | so that FRAME_FOCUS_FRAME is moved appropriately as we |
| 1948 | move around in the state where a minibuffer in a separate |
| 1949 | frame is active. */ |
| 1950 | Fselect_frame (WINDOW_FRAME (w), Qnil); |
| 1951 | } |
| 1952 | else |
| 1953 | selected_frame->selected_window = window; |
| 1954 | |
| 1955 | record_buffer (w->buffer); |
| 1956 | Fset_buffer (w->buffer); |
| 1957 | |
| 1958 | XBUFFER (w->buffer)->last_selected_window = window; |
| 1959 | |
| 1960 | /* Go to the point recorded in the window. |
| 1961 | This is important when the buffer is in more |
| 1962 | than one window. It also matters when |
| 1963 | redisplay_window has altered point after scrolling, |
| 1964 | because it makes the change only in the window. */ |
| 1965 | { |
| 1966 | register int new_point = marker_position (w->pointm); |
| 1967 | if (new_point < BEGV) |
| 1968 | SET_PT (BEGV); |
| 1969 | else if (new_point > ZV) |
| 1970 | SET_PT (ZV); |
| 1971 | else |
| 1972 | SET_PT (new_point); |
| 1973 | } |
| 1974 | |
| 1975 | windows_or_buffers_changed++; |
| 1976 | return window; |
| 1977 | } |
| 1978 | |
| 1979 | /* Deiconify the frame containing the window WINDOW, |
| 1980 | unless it is the selected frame; |
| 1981 | then return WINDOW. |
| 1982 | |
| 1983 | The reason for the exception for the selected frame |
| 1984 | is that it seems better not to change the selected frames visibility |
| 1985 | merely because of displaying a different buffer in it. |
| 1986 | The deiconification is useful when a buffer gets shown in |
| 1987 | another frame that you were not using lately. */ |
| 1988 | |
| 1989 | static Lisp_Object |
| 1990 | display_buffer_1 (window) |
| 1991 | Lisp_Object window; |
| 1992 | { |
| 1993 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (window))); |
| 1994 | FRAME_SAMPLE_VISIBILITY (f); |
| 1995 | if (f != selected_frame) |
| 1996 | { |
| 1997 | if (FRAME_ICONIFIED_P (f)) |
| 1998 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window))); |
| 1999 | else if (FRAME_VISIBLE_P (f)) |
| 2000 | Fraise_frame (WINDOW_FRAME (XWINDOW (window))); |
| 2001 | } |
| 2002 | return window; |
| 2003 | } |
| 2004 | |
| 2005 | DEFUN ("special-display-p", Fspecial_display_p, Sspecial_display_p, 1, 1, 0, |
| 2006 | "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\ |
| 2007 | The value is actually t if the frame should be called with default frame\n\ |
| 2008 | parameters, and a list of frame parameters if they were specified.\n\ |
| 2009 | See `special-display-buffer-names', and `special-display-regexps'.") |
| 2010 | (buffer_name) |
| 2011 | Lisp_Object buffer_name; |
| 2012 | { |
| 2013 | Lisp_Object tem; |
| 2014 | |
| 2015 | CHECK_STRING (buffer_name, 1); |
| 2016 | |
| 2017 | tem = Fmember (buffer_name, Vspecial_display_buffer_names); |
| 2018 | if (!NILP (tem)) |
| 2019 | return Qt; |
| 2020 | |
| 2021 | tem = Fassoc (buffer_name, Vspecial_display_buffer_names); |
| 2022 | if (!NILP (tem)) |
| 2023 | return XCDR (tem); |
| 2024 | |
| 2025 | for (tem = Vspecial_display_regexps; CONSP (tem); tem = XCDR (tem)) |
| 2026 | { |
| 2027 | Lisp_Object car = XCAR (tem); |
| 2028 | if (STRINGP (car) |
| 2029 | && fast_string_match (car, buffer_name) >= 0) |
| 2030 | return Qt; |
| 2031 | else if (CONSP (car) |
| 2032 | && STRINGP (XCAR (car)) |
| 2033 | && fast_string_match (XCAR (car), buffer_name) >= 0) |
| 2034 | return XCDR (tem); |
| 2035 | } |
| 2036 | return Qnil; |
| 2037 | } |
| 2038 | |
| 2039 | DEFUN ("same-window-p", Fsame_window_p, Ssame_window_p, 1, 1, 0, |
| 2040 | "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\ |
| 2041 | See `same-window-buffer-names' and `same-window-regexps'.") |
| 2042 | (buffer_name) |
| 2043 | Lisp_Object buffer_name; |
| 2044 | { |
| 2045 | Lisp_Object tem; |
| 2046 | |
| 2047 | CHECK_STRING (buffer_name, 1); |
| 2048 | |
| 2049 | tem = Fmember (buffer_name, Vsame_window_buffer_names); |
| 2050 | if (!NILP (tem)) |
| 2051 | return Qt; |
| 2052 | |
| 2053 | tem = Fassoc (buffer_name, Vsame_window_buffer_names); |
| 2054 | if (!NILP (tem)) |
| 2055 | return Qt; |
| 2056 | |
| 2057 | for (tem = Vsame_window_regexps; CONSP (tem); tem = XCDR (tem)) |
| 2058 | { |
| 2059 | Lisp_Object car = XCAR (tem); |
| 2060 | if (STRINGP (car) |
| 2061 | && fast_string_match (car, buffer_name) >= 0) |
| 2062 | return Qt; |
| 2063 | else if (CONSP (car) |
| 2064 | && STRINGP (XCAR (car)) |
| 2065 | && fast_string_match (XCAR (car), buffer_name) >= 0) |
| 2066 | return Qt; |
| 2067 | } |
| 2068 | return Qnil; |
| 2069 | } |
| 2070 | |
| 2071 | DEFUN ("display-buffer", Fdisplay_buffer, Sdisplay_buffer, 1, 2, |
| 2072 | "bDisplay buffer: \nP", |
| 2073 | "Make BUFFER appear in some window but don't select it.\n\ |
| 2074 | BUFFER can be a buffer or a buffer name.\n\ |
| 2075 | If BUFFER is shown already in some window, just use that one,\n\ |
| 2076 | unless the window is the selected window and the optional second\n\ |
| 2077 | argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\ |
| 2078 | If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\ |
| 2079 | Returns the window displaying BUFFER.\n\ |
| 2080 | \n\ |
| 2081 | The variables `special-display-buffer-names', `special-display-regexps',\n\ |
| 2082 | `same-window-buffer-names', and `same-window-regexps' customize how certain\n\ |
| 2083 | buffer names are handled.") |
| 2084 | (buffer, not_this_window) |
| 2085 | register Lisp_Object buffer, not_this_window; |
| 2086 | { |
| 2087 | register Lisp_Object window, tem; |
| 2088 | |
| 2089 | buffer = Fget_buffer (buffer); |
| 2090 | CHECK_BUFFER (buffer, 0); |
| 2091 | |
| 2092 | if (!NILP (Vdisplay_buffer_function)) |
| 2093 | return call2 (Vdisplay_buffer_function, buffer, not_this_window); |
| 2094 | |
| 2095 | if (NILP (not_this_window) |
| 2096 | && XBUFFER (XWINDOW (selected_window)->buffer) == XBUFFER (buffer)) |
| 2097 | return display_buffer_1 (selected_window); |
| 2098 | |
| 2099 | /* See if the user has specified this buffer should appear |
| 2100 | in the selected window. */ |
| 2101 | if (NILP (not_this_window)) |
| 2102 | { |
| 2103 | tem = Fsame_window_p (XBUFFER (buffer)->name); |
| 2104 | if (!NILP (tem)) |
| 2105 | { |
| 2106 | Fswitch_to_buffer (buffer, Qnil); |
| 2107 | return display_buffer_1 (selected_window); |
| 2108 | } |
| 2109 | } |
| 2110 | |
| 2111 | /* If pop_up_frames, |
| 2112 | look for a window showing BUFFER on any visible or iconified frame. |
| 2113 | Otherwise search only the current frame. */ |
| 2114 | if (pop_up_frames || last_nonminibuf_frame == 0) |
| 2115 | XSETFASTINT (tem, 0); |
| 2116 | else |
| 2117 | XSETFRAME (tem, last_nonminibuf_frame); |
| 2118 | window = Fget_buffer_window (buffer, tem); |
| 2119 | if (!NILP (window) |
| 2120 | && (NILP (not_this_window) || !EQ (window, selected_window))) |
| 2121 | { |
| 2122 | return display_buffer_1 (window); |
| 2123 | } |
| 2124 | |
| 2125 | /* Certain buffer names get special handling. */ |
| 2126 | if (!NILP (Vspecial_display_function)) |
| 2127 | { |
| 2128 | tem = Fspecial_display_p (XBUFFER (buffer)->name); |
| 2129 | if (EQ (tem, Qt)) |
| 2130 | return call1 (Vspecial_display_function, buffer); |
| 2131 | if (CONSP (tem)) |
| 2132 | return call2 (Vspecial_display_function, buffer, tem); |
| 2133 | } |
| 2134 | |
| 2135 | /* If there are no frames open that have more than a minibuffer, |
| 2136 | we need to create a new frame. */ |
| 2137 | if (pop_up_frames || last_nonminibuf_frame == 0) |
| 2138 | { |
| 2139 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
| 2140 | Fset_window_buffer (window, buffer); |
| 2141 | return display_buffer_1 (window); |
| 2142 | } |
| 2143 | |
| 2144 | if (pop_up_windows |
| 2145 | || FRAME_MINIBUF_ONLY_P (selected_frame) |
| 2146 | /* If the current frame is a special display frame, |
| 2147 | don't try to reuse its windows. */ |
| 2148 | || !NILP (XWINDOW (FRAME_ROOT_WINDOW (selected_frame))->dedicated) |
| 2149 | ) |
| 2150 | { |
| 2151 | Lisp_Object frames; |
| 2152 | |
| 2153 | frames = Qnil; |
| 2154 | if (FRAME_MINIBUF_ONLY_P (selected_frame)) |
| 2155 | XSETFRAME (frames, last_nonminibuf_frame); |
| 2156 | /* Don't try to create a window if would get an error */ |
| 2157 | if (split_height_threshold < window_min_height << 1) |
| 2158 | split_height_threshold = window_min_height << 1; |
| 2159 | |
| 2160 | /* Note that both Fget_largest_window and Fget_lru_window |
| 2161 | ignore minibuffers and dedicated windows. |
| 2162 | This means they can return nil. */ |
| 2163 | |
| 2164 | /* If the frame we would try to split cannot be split, |
| 2165 | try other frames. */ |
| 2166 | if (FRAME_NO_SPLIT_P (NILP (frames) ? selected_frame |
| 2167 | : last_nonminibuf_frame)) |
| 2168 | { |
| 2169 | /* Try visible frames first. */ |
| 2170 | window = Fget_largest_window (Qvisible); |
| 2171 | /* If that didn't work, try iconified frames. */ |
| 2172 | if (NILP (window)) |
| 2173 | window = Fget_largest_window (make_number (0)); |
| 2174 | if (NILP (window)) |
| 2175 | window = Fget_largest_window (Qt); |
| 2176 | } |
| 2177 | else |
| 2178 | window = Fget_largest_window (frames); |
| 2179 | |
| 2180 | /* If we got a tall enough full-width window that can be split, |
| 2181 | split it. */ |
| 2182 | if (!NILP (window) |
| 2183 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
| 2184 | && window_height (window) >= split_height_threshold |
| 2185 | && WINDOW_FULL_WIDTH_P (XWINDOW (window))) |
| 2186 | window = Fsplit_window (window, Qnil, Qnil); |
| 2187 | else |
| 2188 | { |
| 2189 | Lisp_Object upper, lower, other; |
| 2190 | |
| 2191 | window = Fget_lru_window (frames); |
| 2192 | /* If the LRU window is selected, and big enough, |
| 2193 | and can be split, split it. */ |
| 2194 | if (!NILP (window) |
| 2195 | && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window)->frame)) |
| 2196 | && (EQ (window, selected_window) |
| 2197 | || EQ (XWINDOW (window)->parent, Qnil)) |
| 2198 | && window_height (window) >= window_min_height << 1) |
| 2199 | window = Fsplit_window (window, Qnil, Qnil); |
| 2200 | /* If Fget_lru_window returned nil, try other approaches. */ |
| 2201 | /* Try visible frames first. */ |
| 2202 | if (NILP (window)) |
| 2203 | window = Fget_largest_window (Qvisible); |
| 2204 | /* If that didn't work, try iconified frames. */ |
| 2205 | if (NILP (window)) |
| 2206 | window = Fget_largest_window (make_number (0)); |
| 2207 | /* Try invisible frames. */ |
| 2208 | if (NILP (window)) |
| 2209 | window = Fget_largest_window (Qt); |
| 2210 | /* As a last resort, make a new frame. */ |
| 2211 | if (NILP (window)) |
| 2212 | window = Fframe_selected_window (call0 (Vpop_up_frame_function)); |
| 2213 | /* If window appears above or below another, |
| 2214 | even out their heights. */ |
| 2215 | other = upper = lower = Qnil; |
| 2216 | if (!NILP (XWINDOW (window)->prev)) |
| 2217 | other = upper = XWINDOW (window)->prev, lower = window; |
| 2218 | if (!NILP (XWINDOW (window)->next)) |
| 2219 | other = lower = XWINDOW (window)->next, upper = window; |
| 2220 | if (!NILP (other) |
| 2221 | /* Check that OTHER and WINDOW are vertically arrayed. */ |
| 2222 | && XWINDOW (other)->top != XWINDOW (window)->top |
| 2223 | && XWINDOW (other)->height > XWINDOW (window)->height) |
| 2224 | { |
| 2225 | int total = XWINDOW (other)->height + XWINDOW (window)->height; |
| 2226 | Lisp_Object old_selected_window; |
| 2227 | old_selected_window = selected_window; |
| 2228 | |
| 2229 | selected_window = upper; |
| 2230 | change_window_height (total / 2 - XWINDOW (upper)->height, 0); |
| 2231 | selected_window = old_selected_window; |
| 2232 | } |
| 2233 | } |
| 2234 | } |
| 2235 | else |
| 2236 | window = Fget_lru_window (Qnil); |
| 2237 | |
| 2238 | Fset_window_buffer (window, buffer); |
| 2239 | return display_buffer_1 (window); |
| 2240 | } |
| 2241 | |
| 2242 | void |
| 2243 | temp_output_buffer_show (buf) |
| 2244 | register Lisp_Object buf; |
| 2245 | { |
| 2246 | register struct buffer *old = current_buffer; |
| 2247 | register Lisp_Object window; |
| 2248 | register struct window *w; |
| 2249 | |
| 2250 | Fset_buffer (buf); |
| 2251 | BUF_SAVE_MODIFF (XBUFFER (buf)) = MODIFF; |
| 2252 | BEGV = BEG; |
| 2253 | ZV = Z; |
| 2254 | SET_PT (BEG); |
| 2255 | XBUFFER (buf)->clip_changed = 1; |
| 2256 | set_buffer_internal (old); |
| 2257 | |
| 2258 | if (!EQ (Vtemp_buffer_show_function, Qnil)) |
| 2259 | call1 (Vtemp_buffer_show_function, buf); |
| 2260 | else |
| 2261 | { |
| 2262 | window = Fdisplay_buffer (buf, Qnil); |
| 2263 | |
| 2264 | if (XFRAME (XWINDOW (window)->frame) != selected_frame) |
| 2265 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window))); |
| 2266 | Vminibuf_scroll_window = window; |
| 2267 | w = XWINDOW (window); |
| 2268 | XSETFASTINT (w->hscroll, 0); |
| 2269 | set_marker_restricted (w->start, make_number (1), buf); |
| 2270 | set_marker_restricted (w->pointm, make_number (1), buf); |
| 2271 | |
| 2272 | /* Run temp-buffer-show-hook, with the chosen window selected. */ |
| 2273 | if (!NILP (Vrun_hooks)) |
| 2274 | { |
| 2275 | Lisp_Object tem; |
| 2276 | tem = Fboundp (Qtemp_buffer_show_hook); |
| 2277 | if (!NILP (tem)) |
| 2278 | { |
| 2279 | tem = Fsymbol_value (Qtemp_buffer_show_hook); |
| 2280 | if (!NILP (tem)) |
| 2281 | { |
| 2282 | int count = specpdl_ptr - specpdl; |
| 2283 | |
| 2284 | /* Select the window that was chosen, for running the hook. */ |
| 2285 | record_unwind_protect (Fset_window_configuration, |
| 2286 | Fcurrent_window_configuration (Qnil)); |
| 2287 | |
| 2288 | Fselect_window (window); |
| 2289 | call1 (Vrun_hooks, Qtemp_buffer_show_hook); |
| 2290 | unbind_to (count, Qnil); |
| 2291 | } |
| 2292 | } |
| 2293 | } |
| 2294 | } |
| 2295 | } |
| 2296 | \f |
| 2297 | static |
| 2298 | make_dummy_parent (window) |
| 2299 | Lisp_Object window; |
| 2300 | { |
| 2301 | Lisp_Object new; |
| 2302 | register struct window *o, *p; |
| 2303 | register struct Lisp_Vector *vec; |
| 2304 | int i; |
| 2305 | |
| 2306 | o = XWINDOW (window); |
| 2307 | vec = allocate_vectorlike ((EMACS_INT)VECSIZE (struct window)); |
| 2308 | for (i = 0; i < VECSIZE (struct window); ++i) |
| 2309 | vec->contents[i] = ((struct Lisp_Vector *)o)->contents[i]; |
| 2310 | vec->size = VECSIZE (struct window); |
| 2311 | p = (struct window *)vec; |
| 2312 | XSETWINDOW (new, p); |
| 2313 | |
| 2314 | XSETFASTINT (p->sequence_number, ++sequence_number); |
| 2315 | |
| 2316 | /* Put new into window structure in place of window */ |
| 2317 | replace_window (window, new); |
| 2318 | |
| 2319 | o->next = Qnil; |
| 2320 | o->prev = Qnil; |
| 2321 | o->vchild = Qnil; |
| 2322 | o->hchild = Qnil; |
| 2323 | o->parent = new; |
| 2324 | |
| 2325 | p->start = Qnil; |
| 2326 | p->pointm = Qnil; |
| 2327 | p->buffer = Qnil; |
| 2328 | } |
| 2329 | |
| 2330 | DEFUN ("split-window", Fsplit_window, Ssplit_window, 0, 3, "", |
| 2331 | "Split WINDOW, putting SIZE lines in the first of the pair.\n\ |
| 2332 | WINDOW defaults to selected one and SIZE to half its size.\n\ |
| 2333 | If optional third arg HORFLAG is non-nil, split side by side\n\ |
| 2334 | and put SIZE columns in the first of the pair.") |
| 2335 | (window, size, horflag) |
| 2336 | Lisp_Object window, size, horflag; |
| 2337 | { |
| 2338 | register Lisp_Object new; |
| 2339 | register struct window *o, *p; |
| 2340 | FRAME_PTR fo; |
| 2341 | register int size_int; |
| 2342 | |
| 2343 | if (NILP (window)) |
| 2344 | window = selected_window; |
| 2345 | else |
| 2346 | CHECK_LIVE_WINDOW (window, 0); |
| 2347 | |
| 2348 | o = XWINDOW (window); |
| 2349 | fo = XFRAME (WINDOW_FRAME (o)); |
| 2350 | |
| 2351 | if (NILP (size)) |
| 2352 | { |
| 2353 | if (!NILP (horflag)) |
| 2354 | /* Calculate the size of the left-hand window, by dividing |
| 2355 | the usable space in columns by two. */ |
| 2356 | size_int = XFASTINT (o->width) >> 1; |
| 2357 | else |
| 2358 | size_int = XFASTINT (o->height) >> 1; |
| 2359 | } |
| 2360 | else |
| 2361 | { |
| 2362 | CHECK_NUMBER (size, 1); |
| 2363 | size_int = XINT (size); |
| 2364 | } |
| 2365 | |
| 2366 | if (MINI_WINDOW_P (o)) |
| 2367 | error ("Attempt to split minibuffer window"); |
| 2368 | else if (FRAME_NO_SPLIT_P (fo)) |
| 2369 | error ("Attempt to split unsplittable frame"); |
| 2370 | |
| 2371 | check_min_window_sizes (); |
| 2372 | |
| 2373 | if (NILP (horflag)) |
| 2374 | { |
| 2375 | if (size_int < window_min_height) |
| 2376 | error ("Window height %d too small (after splitting)", size_int); |
| 2377 | if (size_int + window_min_height > XFASTINT (o->height)) |
| 2378 | error ("Window height %d too small (after splitting)", |
| 2379 | XFASTINT (o->height) - size_int); |
| 2380 | if (NILP (o->parent) |
| 2381 | || NILP (XWINDOW (o->parent)->vchild)) |
| 2382 | { |
| 2383 | make_dummy_parent (window); |
| 2384 | new = o->parent; |
| 2385 | XWINDOW (new)->vchild = window; |
| 2386 | } |
| 2387 | } |
| 2388 | else |
| 2389 | { |
| 2390 | if (size_int < window_min_width) |
| 2391 | error ("Window width %d too small (after splitting)", size_int); |
| 2392 | |
| 2393 | if (size_int + window_min_width > XFASTINT (o->width)) |
| 2394 | error ("Window width %d too small (after splitting)", |
| 2395 | XFASTINT (o->width) - size_int); |
| 2396 | if (NILP (o->parent) |
| 2397 | || NILP (XWINDOW (o->parent)->hchild)) |
| 2398 | { |
| 2399 | make_dummy_parent (window); |
| 2400 | new = o->parent; |
| 2401 | XWINDOW (new)->hchild = window; |
| 2402 | } |
| 2403 | } |
| 2404 | |
| 2405 | /* Now we know that window's parent is a vertical combination |
| 2406 | if we are dividing vertically, or a horizontal combination |
| 2407 | if we are making side-by-side windows */ |
| 2408 | |
| 2409 | windows_or_buffers_changed++; |
| 2410 | FRAME_WINDOW_SIZES_CHANGED (fo) = 1; |
| 2411 | new = make_window (); |
| 2412 | p = XWINDOW (new); |
| 2413 | |
| 2414 | p->frame = o->frame; |
| 2415 | p->next = o->next; |
| 2416 | if (!NILP (p->next)) |
| 2417 | XWINDOW (p->next)->prev = new; |
| 2418 | p->prev = window; |
| 2419 | o->next = new; |
| 2420 | p->parent = o->parent; |
| 2421 | p->buffer = Qt; |
| 2422 | |
| 2423 | Fset_window_buffer (new, o->buffer); |
| 2424 | |
| 2425 | /* Apportion the available frame space among the two new windows */ |
| 2426 | |
| 2427 | if (!NILP (horflag)) |
| 2428 | { |
| 2429 | p->height = o->height; |
| 2430 | p->top = o->top; |
| 2431 | XSETFASTINT (p->width, XFASTINT (o->width) - size_int); |
| 2432 | XSETFASTINT (o->width, size_int); |
| 2433 | XSETFASTINT (p->left, XFASTINT (o->left) + size_int); |
| 2434 | } |
| 2435 | else |
| 2436 | { |
| 2437 | p->left = o->left; |
| 2438 | p->width = o->width; |
| 2439 | XSETFASTINT (p->height, XFASTINT (o->height) - size_int); |
| 2440 | XSETFASTINT (o->height, size_int); |
| 2441 | XSETFASTINT (p->top, XFASTINT (o->top) + size_int); |
| 2442 | } |
| 2443 | |
| 2444 | return new; |
| 2445 | } |
| 2446 | \f |
| 2447 | DEFUN ("enlarge-window", Fenlarge_window, Senlarge_window, 1, 2, "p", |
| 2448 | "Make current window ARG lines bigger.\n\ |
| 2449 | From program, optional second arg non-nil means grow sideways ARG columns.") |
| 2450 | (arg, side) |
| 2451 | register Lisp_Object arg, side; |
| 2452 | { |
| 2453 | CHECK_NUMBER (arg, 0); |
| 2454 | change_window_height (XINT (arg), !NILP (side)); |
| 2455 | return Qnil; |
| 2456 | } |
| 2457 | |
| 2458 | DEFUN ("shrink-window", Fshrink_window, Sshrink_window, 1, 2, "p", |
| 2459 | "Make current window ARG lines smaller.\n\ |
| 2460 | From program, optional second arg non-nil means shrink sideways arg columns.") |
| 2461 | (arg, side) |
| 2462 | register Lisp_Object arg, side; |
| 2463 | { |
| 2464 | CHECK_NUMBER (arg, 0); |
| 2465 | change_window_height (-XINT (arg), !NILP (side)); |
| 2466 | return Qnil; |
| 2467 | } |
| 2468 | |
| 2469 | int |
| 2470 | window_height (window) |
| 2471 | Lisp_Object window; |
| 2472 | { |
| 2473 | register struct window *p = XWINDOW (window); |
| 2474 | return XFASTINT (p->height); |
| 2475 | } |
| 2476 | |
| 2477 | int |
| 2478 | window_width (window) |
| 2479 | Lisp_Object window; |
| 2480 | { |
| 2481 | register struct window *p = XWINDOW (window); |
| 2482 | return XFASTINT (p->width); |
| 2483 | } |
| 2484 | |
| 2485 | #define MINSIZE(w) \ |
| 2486 | (widthflag \ |
| 2487 | ? window_min_width \ |
| 2488 | : (MINI_WINDOW_P (XWINDOW (w)) ? 1 : window_min_height)) |
| 2489 | |
| 2490 | #define CURBEG(w) \ |
| 2491 | *(widthflag ? (int *) &(XWINDOW (w)->left) : (int *) &(XWINDOW (w)->top)) |
| 2492 | |
| 2493 | #define CURSIZE(w) \ |
| 2494 | *(widthflag ? (int *) &(XWINDOW (w)->width) : (int *) &(XWINDOW (w)->height)) |
| 2495 | |
| 2496 | /* Unlike set_window_height, this function |
| 2497 | also changes the heights of the siblings so as to |
| 2498 | keep everything consistent. */ |
| 2499 | |
| 2500 | change_window_height (delta, widthflag) |
| 2501 | register int delta; |
| 2502 | int widthflag; |
| 2503 | { |
| 2504 | register Lisp_Object parent; |
| 2505 | Lisp_Object window; |
| 2506 | register struct window *p; |
| 2507 | int *sizep; |
| 2508 | int (*sizefun) () = widthflag ? window_width : window_height; |
| 2509 | register int (*setsizefun) () = (widthflag |
| 2510 | ? set_window_width |
| 2511 | : set_window_height); |
| 2512 | int maximum; |
| 2513 | Lisp_Object next, prev; |
| 2514 | |
| 2515 | check_min_window_sizes (); |
| 2516 | |
| 2517 | window = selected_window; |
| 2518 | while (1) |
| 2519 | { |
| 2520 | p = XWINDOW (window); |
| 2521 | parent = p->parent; |
| 2522 | if (NILP (parent)) |
| 2523 | { |
| 2524 | if (widthflag) |
| 2525 | error ("No other window to side of this one"); |
| 2526 | break; |
| 2527 | } |
| 2528 | if (widthflag ? !NILP (XWINDOW (parent)->hchild) |
| 2529 | : !NILP (XWINDOW (parent)->vchild)) |
| 2530 | break; |
| 2531 | window = parent; |
| 2532 | } |
| 2533 | |
| 2534 | sizep = &CURSIZE (window); |
| 2535 | |
| 2536 | { |
| 2537 | register int maxdelta; |
| 2538 | |
| 2539 | maxdelta = (!NILP (parent) ? (*sizefun) (parent) - *sizep |
| 2540 | : !NILP (p->next) ? (*sizefun) (p->next) - MINSIZE (p->next) |
| 2541 | : !NILP (p->prev) ? (*sizefun) (p->prev) - MINSIZE (p->prev) |
| 2542 | /* This is a frame with only one window, a minibuffer-only |
| 2543 | or a minibufferless frame. */ |
| 2544 | : (delta = 0)); |
| 2545 | |
| 2546 | if (delta > maxdelta) |
| 2547 | /* This case traps trying to make the minibuffer |
| 2548 | the full frame, or make the only window aside from the |
| 2549 | minibuffer the full frame. */ |
| 2550 | delta = maxdelta; |
| 2551 | } |
| 2552 | |
| 2553 | if (*sizep + delta < MINSIZE (window)) |
| 2554 | { |
| 2555 | Fdelete_window (window); |
| 2556 | return; |
| 2557 | } |
| 2558 | |
| 2559 | if (delta == 0) |
| 2560 | return; |
| 2561 | |
| 2562 | /* Find the total we can get from other siblings. */ |
| 2563 | maximum = 0; |
| 2564 | for (next = p->next; ! NILP (next); next = XWINDOW (next)->next) |
| 2565 | maximum += (*sizefun) (next) - MINSIZE (next); |
| 2566 | for (prev = p->prev; ! NILP (prev); prev = XWINDOW (prev)->prev) |
| 2567 | maximum += (*sizefun) (prev) - MINSIZE (prev); |
| 2568 | |
| 2569 | /* If we can get it all from them, do so. */ |
| 2570 | if (delta < maximum) |
| 2571 | { |
| 2572 | Lisp_Object first_unaffected; |
| 2573 | Lisp_Object first_affected; |
| 2574 | |
| 2575 | next = p->next; |
| 2576 | prev = p->prev; |
| 2577 | first_affected = window; |
| 2578 | /* Look at one sibling at a time, |
| 2579 | moving away from this window in both directions alternately, |
| 2580 | and take as much as we can get without deleting that sibling. */ |
| 2581 | while (delta != 0) |
| 2582 | { |
| 2583 | if (delta == 0) |
| 2584 | break; |
| 2585 | if (! NILP (next)) |
| 2586 | { |
| 2587 | int this_one = (*sizefun) (next) - MINSIZE (next); |
| 2588 | if (this_one > delta) |
| 2589 | this_one = delta; |
| 2590 | |
| 2591 | (*setsizefun) (next, (*sizefun) (next) - this_one, 0); |
| 2592 | (*setsizefun) (window, *sizep + this_one, 0); |
| 2593 | |
| 2594 | delta -= this_one; |
| 2595 | next = XWINDOW (next)->next; |
| 2596 | } |
| 2597 | if (delta == 0) |
| 2598 | break; |
| 2599 | if (! NILP (prev)) |
| 2600 | { |
| 2601 | int this_one = (*sizefun) (prev) - MINSIZE (prev); |
| 2602 | if (this_one > delta) |
| 2603 | this_one = delta; |
| 2604 | |
| 2605 | first_affected = prev; |
| 2606 | |
| 2607 | (*setsizefun) (prev, (*sizefun) (prev) - this_one, 0); |
| 2608 | (*setsizefun) (window, *sizep + this_one, 0); |
| 2609 | |
| 2610 | delta -= this_one; |
| 2611 | prev = XWINDOW (prev)->prev; |
| 2612 | } |
| 2613 | } |
| 2614 | |
| 2615 | /* Now recalculate the edge positions of all the windows affected, |
| 2616 | based on the new sizes. */ |
| 2617 | first_unaffected = next; |
| 2618 | prev = first_affected; |
| 2619 | for (next = XWINDOW (prev)->next; ! EQ (next, first_unaffected); |
| 2620 | prev = next, next = XWINDOW (next)->next) |
| 2621 | { |
| 2622 | CURBEG (next) = CURBEG (prev) + (*sizefun) (prev); |
| 2623 | /* This does not change size of NEXT, |
| 2624 | but it propagates the new top edge to its children */ |
| 2625 | (*setsizefun) (next, (*sizefun) (next), 0); |
| 2626 | } |
| 2627 | } |
| 2628 | else |
| 2629 | { |
| 2630 | register int delta1; |
| 2631 | register int opht = (*sizefun) (parent); |
| 2632 | |
| 2633 | /* If trying to grow this window to or beyond size of the parent, |
| 2634 | make delta1 so big that, on shrinking back down, |
| 2635 | all the siblings end up with less than one line and are deleted. */ |
| 2636 | if (opht <= *sizep + delta) |
| 2637 | delta1 = opht * opht * 2; |
| 2638 | /* Otherwise, make delta1 just right so that if we add delta1 |
| 2639 | lines to this window and to the parent, and then shrink |
| 2640 | the parent back to its original size, the new proportional |
| 2641 | size of this window will increase by delta. */ |
| 2642 | else |
| 2643 | delta1 = (delta * opht * 100) / ((opht - *sizep - delta) * 100); |
| 2644 | |
| 2645 | /* Add delta1 lines or columns to this window, and to the parent, |
| 2646 | keeping things consistent while not affecting siblings. */ |
| 2647 | CURSIZE (parent) = opht + delta1; |
| 2648 | (*setsizefun) (window, *sizep + delta1, 0); |
| 2649 | |
| 2650 | /* Squeeze out delta1 lines or columns from our parent, |
| 2651 | shriking this window and siblings proportionately. |
| 2652 | This brings parent back to correct size. |
| 2653 | Delta1 was calculated so this makes this window the desired size, |
| 2654 | taking it all out of the siblings. */ |
| 2655 | (*setsizefun) (parent, opht, 0); |
| 2656 | } |
| 2657 | |
| 2658 | XSETFASTINT (p->last_modified, 0); |
| 2659 | XSETFASTINT (p->last_overlay_modified, 0); |
| 2660 | } |
| 2661 | #undef MINSIZE |
| 2662 | #undef CURBEG |
| 2663 | #undef CURSIZE |
| 2664 | |
| 2665 | \f |
| 2666 | /* Return number of lines of text (not counting mode line) in W. */ |
| 2667 | |
| 2668 | int |
| 2669 | window_internal_height (w) |
| 2670 | struct window *w; |
| 2671 | { |
| 2672 | int ht = XFASTINT (w->height); |
| 2673 | |
| 2674 | if (MINI_WINDOW_P (w)) |
| 2675 | return ht; |
| 2676 | |
| 2677 | if (!NILP (w->parent) || !NILP (w->vchild) || !NILP (w->hchild) |
| 2678 | || !NILP (w->next) || !NILP (w->prev) |
| 2679 | || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w)))) |
| 2680 | return ht - 1; |
| 2681 | |
| 2682 | return ht; |
| 2683 | } |
| 2684 | |
| 2685 | |
| 2686 | /* Return the number of columns in W. |
| 2687 | Don't count columns occupied by scroll bars or the vertical bar |
| 2688 | separating W from the sibling to its right. */ |
| 2689 | int |
| 2690 | window_internal_width (w) |
| 2691 | struct window *w; |
| 2692 | { |
| 2693 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
| 2694 | int width = XINT (w->width); |
| 2695 | |
| 2696 | /* Scroll bars occupy a few columns. */ |
| 2697 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
| 2698 | return width - FRAME_SCROLL_BAR_COLS (f); |
| 2699 | |
| 2700 | /* The column of `|' characters separating side-by-side windows |
| 2701 | occupies one column only. */ |
| 2702 | if (!WINDOW_RIGHTMOST_P (w) && !WINDOW_FULL_WIDTH_P (w)) |
| 2703 | return width - 1; |
| 2704 | |
| 2705 | return width; |
| 2706 | } |
| 2707 | |
| 2708 | |
| 2709 | /* Scroll contents of window WINDOW up N lines. |
| 2710 | If WHOLE is nonzero, it means scroll N screenfuls instead. */ |
| 2711 | |
| 2712 | static void |
| 2713 | window_scroll (window, n, whole, noerror) |
| 2714 | Lisp_Object window; |
| 2715 | int n; |
| 2716 | int whole; |
| 2717 | int noerror; |
| 2718 | { |
| 2719 | register struct window *w = XWINDOW (window); |
| 2720 | register int opoint = PT; |
| 2721 | register int pos; |
| 2722 | register int ht = window_internal_height (w); |
| 2723 | register Lisp_Object tem; |
| 2724 | int lose; |
| 2725 | Lisp_Object bolp, nmoved; |
| 2726 | int startpos; |
| 2727 | struct position posit; |
| 2728 | int original_vpos; |
| 2729 | |
| 2730 | startpos = marker_position (w->start); |
| 2731 | |
| 2732 | posit = *compute_motion (startpos, 0, 0, 0, |
| 2733 | PT, ht, 0, |
| 2734 | window_internal_width (w), XINT (w->hscroll), |
| 2735 | 0, w); |
| 2736 | original_vpos = posit.vpos; |
| 2737 | |
| 2738 | XSETFASTINT (tem, PT); |
| 2739 | tem = Fpos_visible_in_window_p (tem, window); |
| 2740 | |
| 2741 | if (NILP (tem)) |
| 2742 | { |
| 2743 | Fvertical_motion (make_number (- (ht / 2)), window); |
| 2744 | startpos = PT; |
| 2745 | } |
| 2746 | |
| 2747 | SET_PT (startpos); |
| 2748 | lose = n < 0 && PT == BEGV; |
| 2749 | Fvertical_motion (make_number (n), window); |
| 2750 | pos = PT; |
| 2751 | bolp = Fbolp (); |
| 2752 | SET_PT (opoint); |
| 2753 | |
| 2754 | if (lose) |
| 2755 | { |
| 2756 | if (noerror) |
| 2757 | return; |
| 2758 | else |
| 2759 | Fsignal (Qbeginning_of_buffer, Qnil); |
| 2760 | } |
| 2761 | |
| 2762 | if (pos < ZV) |
| 2763 | { |
| 2764 | int this_scroll_margin = scroll_margin; |
| 2765 | |
| 2766 | /* Don't use a scroll margin that is negative or too large. */ |
| 2767 | if (this_scroll_margin < 0) |
| 2768 | this_scroll_margin = 0; |
| 2769 | |
| 2770 | if (XINT (w->height) < 4 * scroll_margin) |
| 2771 | this_scroll_margin = XINT (w->height) / 4; |
| 2772 | |
| 2773 | set_marker_restricted (w->start, make_number (pos), w->buffer); |
| 2774 | w->start_at_line_beg = bolp; |
| 2775 | w->update_mode_line = Qt; |
| 2776 | XSETFASTINT (w->last_modified, 0); |
| 2777 | XSETFASTINT (w->last_overlay_modified, 0); |
| 2778 | /* Set force_start so that redisplay_window will run |
| 2779 | the window-scroll-functions. */ |
| 2780 | w->force_start = Qt; |
| 2781 | |
| 2782 | if (whole && scroll_preserve_screen_position) |
| 2783 | { |
| 2784 | SET_PT (pos); |
| 2785 | Fvertical_motion (make_number (original_vpos), window); |
| 2786 | } |
| 2787 | /* If we scrolled forward, put point enough lines down |
| 2788 | that it is outside the scroll margin. */ |
| 2789 | else if (n > 0) |
| 2790 | { |
| 2791 | int top_margin; |
| 2792 | |
| 2793 | if (this_scroll_margin > 0) |
| 2794 | { |
| 2795 | SET_PT (pos); |
| 2796 | Fvertical_motion (make_number (this_scroll_margin), window); |
| 2797 | top_margin = PT; |
| 2798 | } |
| 2799 | else |
| 2800 | top_margin = pos; |
| 2801 | |
| 2802 | if (top_margin <= opoint) |
| 2803 | SET_PT (opoint); |
| 2804 | else if (scroll_preserve_screen_position) |
| 2805 | { |
| 2806 | SET_PT (pos); |
| 2807 | Fvertical_motion (make_number (original_vpos), window); |
| 2808 | } |
| 2809 | else |
| 2810 | SET_PT (pos); |
| 2811 | } |
| 2812 | else if (n < 0) |
| 2813 | { |
| 2814 | int bottom_margin; |
| 2815 | |
| 2816 | /* If we scrolled backward, put point near the end of the window |
| 2817 | but not within the scroll margin. */ |
| 2818 | SET_PT (pos); |
| 2819 | tem = Fvertical_motion (make_number (ht - this_scroll_margin), window); |
| 2820 | if (XFASTINT (tem) == ht - this_scroll_margin) |
| 2821 | bottom_margin = PT; |
| 2822 | else |
| 2823 | bottom_margin = PT + 1; |
| 2824 | |
| 2825 | if (bottom_margin > opoint) |
| 2826 | SET_PT (opoint); |
| 2827 | else |
| 2828 | { |
| 2829 | if (scroll_preserve_screen_position) |
| 2830 | { |
| 2831 | SET_PT (pos); |
| 2832 | Fvertical_motion (make_number (original_vpos), window); |
| 2833 | } |
| 2834 | else |
| 2835 | Fvertical_motion (make_number (-1), window); |
| 2836 | } |
| 2837 | } |
| 2838 | } |
| 2839 | else |
| 2840 | { |
| 2841 | if (noerror) |
| 2842 | return; |
| 2843 | else |
| 2844 | Fsignal (Qend_of_buffer, Qnil); |
| 2845 | } |
| 2846 | } |
| 2847 | \f |
| 2848 | /* This is the guts of Fscroll_up and Fscroll_down. */ |
| 2849 | |
| 2850 | static void |
| 2851 | scroll_command (n, direction) |
| 2852 | register Lisp_Object n; |
| 2853 | int direction; |
| 2854 | { |
| 2855 | register int defalt; |
| 2856 | int count = specpdl_ptr - specpdl; |
| 2857 | |
| 2858 | /* If selected window's buffer isn't current, make it current for the moment. |
| 2859 | But don't screw up if window_scroll gets an error. */ |
| 2860 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) |
| 2861 | { |
| 2862 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 2863 | Fset_buffer (XWINDOW (selected_window)->buffer); |
| 2864 | } |
| 2865 | |
| 2866 | defalt = (window_internal_height (XWINDOW (selected_window)) |
| 2867 | - next_screen_context_lines); |
| 2868 | defalt = direction * (defalt < 1 ? 1 : defalt); |
| 2869 | |
| 2870 | if (NILP (n)) |
| 2871 | window_scroll (selected_window, defalt, 1, 0); |
| 2872 | else if (EQ (n, Qminus)) |
| 2873 | window_scroll (selected_window, - defalt, 1, 0); |
| 2874 | else |
| 2875 | { |
| 2876 | n = Fprefix_numeric_value (n); |
| 2877 | window_scroll (selected_window, XINT (n) * direction, 0, 0); |
| 2878 | } |
| 2879 | |
| 2880 | unbind_to (count, Qnil); |
| 2881 | } |
| 2882 | |
| 2883 | DEFUN ("scroll-up", Fscroll_up, Sscroll_up, 0, 1, "P", |
| 2884 | "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\ |
| 2885 | A near full screen is `next-screen-context-lines' less than a full screen.\n\ |
| 2886 | Negative ARG means scroll downward.\n\ |
| 2887 | When calling from a program, supply a number as argument or nil.") |
| 2888 | (arg) |
| 2889 | Lisp_Object arg; |
| 2890 | { |
| 2891 | scroll_command (arg, 1); |
| 2892 | return Qnil; |
| 2893 | } |
| 2894 | |
| 2895 | DEFUN ("scroll-down", Fscroll_down, Sscroll_down, 0, 1, "P", |
| 2896 | "Scroll text of current window downward ARG lines; or near full screen if no ARG.\n\ |
| 2897 | A near full screen is `next-screen-context-lines' less than a full screen.\n\ |
| 2898 | Negative ARG means scroll upward.\n\ |
| 2899 | When calling from a program, supply a number as argument or nil.") |
| 2900 | (arg) |
| 2901 | Lisp_Object arg; |
| 2902 | { |
| 2903 | scroll_command (arg, -1); |
| 2904 | return Qnil; |
| 2905 | } |
| 2906 | \f |
| 2907 | DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling, Sother_window_for_scrolling, 0, 0, 0, |
| 2908 | "Return the other window for \"other window scroll\" commands.\n\ |
| 2909 | If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\ |
| 2910 | specifies the window.\n\ |
| 2911 | If `other-window-scroll-buffer' is non-nil, a window\n\ |
| 2912 | showing that buffer is used.") |
| 2913 | () |
| 2914 | { |
| 2915 | Lisp_Object window; |
| 2916 | |
| 2917 | if (MINI_WINDOW_P (XWINDOW (selected_window)) |
| 2918 | && !NILP (Vminibuf_scroll_window)) |
| 2919 | window = Vminibuf_scroll_window; |
| 2920 | /* If buffer is specified, scroll that buffer. */ |
| 2921 | else if (!NILP (Vother_window_scroll_buffer)) |
| 2922 | { |
| 2923 | window = Fget_buffer_window (Vother_window_scroll_buffer, Qnil); |
| 2924 | if (NILP (window)) |
| 2925 | window = Fdisplay_buffer (Vother_window_scroll_buffer, Qt); |
| 2926 | } |
| 2927 | else |
| 2928 | { |
| 2929 | /* Nothing specified; look for a neighboring window on the same |
| 2930 | frame. */ |
| 2931 | window = Fnext_window (selected_window, Qnil, Qnil); |
| 2932 | |
| 2933 | if (EQ (window, selected_window)) |
| 2934 | /* That didn't get us anywhere; look for a window on another |
| 2935 | visible frame. */ |
| 2936 | do |
| 2937 | window = Fnext_window (window, Qnil, Qt); |
| 2938 | while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window)))) |
| 2939 | && ! EQ (window, selected_window)); |
| 2940 | } |
| 2941 | |
| 2942 | CHECK_LIVE_WINDOW (window, 0); |
| 2943 | |
| 2944 | if (EQ (window, selected_window)) |
| 2945 | error ("There is no other window"); |
| 2946 | |
| 2947 | return window; |
| 2948 | } |
| 2949 | |
| 2950 | DEFUN ("scroll-other-window", Fscroll_other_window, Sscroll_other_window, 0, 1, "P", |
| 2951 | "Scroll next window upward ARG lines; or near full screen if no ARG.\n\ |
| 2952 | The next window is the one below the current one; or the one at the top\n\ |
| 2953 | if the current one is at the bottom. Negative ARG means scroll downward.\n\ |
| 2954 | When calling from a program, supply a number as argument or nil.\n\ |
| 2955 | \n\ |
| 2956 | If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\ |
| 2957 | specifies the window to scroll.\n\ |
| 2958 | If `other-window-scroll-buffer' is non-nil, scroll the window\n\ |
| 2959 | showing that buffer, popping the buffer up if necessary.") |
| 2960 | (arg) |
| 2961 | register Lisp_Object arg; |
| 2962 | { |
| 2963 | register Lisp_Object window; |
| 2964 | register int defalt; |
| 2965 | register struct window *w; |
| 2966 | register int count = specpdl_ptr - specpdl; |
| 2967 | |
| 2968 | window = Fother_window_for_scrolling (); |
| 2969 | |
| 2970 | w = XWINDOW (window); |
| 2971 | defalt = window_internal_height (w) - next_screen_context_lines; |
| 2972 | if (defalt < 1) defalt = 1; |
| 2973 | |
| 2974 | /* Don't screw up if window_scroll gets an error. */ |
| 2975 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 2976 | |
| 2977 | Fset_buffer (w->buffer); |
| 2978 | SET_PT (marker_position (w->pointm)); |
| 2979 | |
| 2980 | if (NILP (arg)) |
| 2981 | window_scroll (window, defalt, 1, 1); |
| 2982 | else if (EQ (arg, Qminus)) |
| 2983 | window_scroll (window, -defalt, 1, 1); |
| 2984 | else |
| 2985 | { |
| 2986 | if (CONSP (arg)) |
| 2987 | arg = Fcar (arg); |
| 2988 | CHECK_NUMBER (arg, 0); |
| 2989 | window_scroll (window, XINT (arg), 0, 1); |
| 2990 | } |
| 2991 | |
| 2992 | Fset_marker (w->pointm, make_number (PT), Qnil); |
| 2993 | unbind_to (count, Qnil); |
| 2994 | |
| 2995 | return Qnil; |
| 2996 | } |
| 2997 | \f |
| 2998 | DEFUN ("scroll-left", Fscroll_left, Sscroll_left, 0, 1, "P", |
| 2999 | "Scroll selected window display ARG columns left.\n\ |
| 3000 | Default for ARG is window width minus 2.") |
| 3001 | (arg) |
| 3002 | register Lisp_Object arg; |
| 3003 | { |
| 3004 | |
| 3005 | if (NILP (arg)) |
| 3006 | XSETFASTINT (arg, window_internal_width (XWINDOW (selected_window)) - 2); |
| 3007 | else |
| 3008 | arg = Fprefix_numeric_value (arg); |
| 3009 | |
| 3010 | return |
| 3011 | Fset_window_hscroll (selected_window, |
| 3012 | make_number (XINT (XWINDOW (selected_window)->hscroll) |
| 3013 | + XINT (arg))); |
| 3014 | } |
| 3015 | |
| 3016 | DEFUN ("scroll-right", Fscroll_right, Sscroll_right, 0, 1, "P", |
| 3017 | "Scroll selected window display ARG columns right.\n\ |
| 3018 | Default for ARG is window width minus 2.") |
| 3019 | (arg) |
| 3020 | register Lisp_Object arg; |
| 3021 | { |
| 3022 | if (NILP (arg)) |
| 3023 | XSETFASTINT (arg, window_internal_width (XWINDOW (selected_window)) - 2); |
| 3024 | else |
| 3025 | arg = Fprefix_numeric_value (arg); |
| 3026 | |
| 3027 | return |
| 3028 | Fset_window_hscroll (selected_window, |
| 3029 | make_number (XINT (XWINDOW (selected_window)->hscroll) |
| 3030 | - XINT (arg))); |
| 3031 | } |
| 3032 | |
| 3033 | DEFUN ("recenter", Frecenter, Srecenter, 0, 1, "P", |
| 3034 | "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\ |
| 3035 | The desired position of point is always relative to the current window.\n\ |
| 3036 | Just C-u as prefix means put point in the center of the window.\n\ |
| 3037 | If ARG is omitted or nil, erases the entire frame and then\n\ |
| 3038 | redraws with point in the center of the current window.") |
| 3039 | (arg) |
| 3040 | register Lisp_Object arg; |
| 3041 | { |
| 3042 | register struct window *w = XWINDOW (selected_window); |
| 3043 | register int ht = window_internal_height (w); |
| 3044 | struct position pos; |
| 3045 | |
| 3046 | if (NILP (arg)) |
| 3047 | { |
| 3048 | extern int frame_garbaged; |
| 3049 | |
| 3050 | SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w))); |
| 3051 | XSETFASTINT (arg, ht / 2); |
| 3052 | } |
| 3053 | else if (CONSP (arg)) /* Just C-u. */ |
| 3054 | { |
| 3055 | XSETFASTINT (arg, ht / 2); |
| 3056 | } |
| 3057 | else |
| 3058 | { |
| 3059 | arg = Fprefix_numeric_value (arg); |
| 3060 | CHECK_NUMBER (arg, 0); |
| 3061 | } |
| 3062 | |
| 3063 | if (XINT (arg) < 0) |
| 3064 | XSETINT (arg, XINT (arg) + ht); |
| 3065 | |
| 3066 | pos = *vmotion (PT, - XINT (arg), w); |
| 3067 | |
| 3068 | Fset_marker (w->start, make_number (pos.bufpos), w->buffer); |
| 3069 | w->start_at_line_beg = ((pos.bufpos == BEGV |
| 3070 | || FETCH_BYTE (pos.bufpos - 1) == '\n') |
| 3071 | ? Qt : Qnil); |
| 3072 | w->force_start = Qt; |
| 3073 | |
| 3074 | return Qnil; |
| 3075 | } |
| 3076 | \f |
| 3077 | DEFUN ("move-to-window-line", Fmove_to_window_line, Smove_to_window_line, |
| 3078 | 1, 1, "P", |
| 3079 | "Position point relative to window.\n\ |
| 3080 | With no argument, position point at center of window.\n\ |
| 3081 | An argument specifies frame line; zero means top of window,\n\ |
| 3082 | negative means relative to bottom of window.") |
| 3083 | (arg) |
| 3084 | register Lisp_Object arg; |
| 3085 | { |
| 3086 | register struct window *w = XWINDOW (selected_window); |
| 3087 | register int height = window_internal_height (w); |
| 3088 | register int start; |
| 3089 | Lisp_Object window; |
| 3090 | |
| 3091 | if (NILP (arg)) |
| 3092 | XSETFASTINT (arg, height / 2); |
| 3093 | else |
| 3094 | { |
| 3095 | arg = Fprefix_numeric_value (arg); |
| 3096 | if (XINT (arg) < 0) |
| 3097 | XSETINT (arg, XINT (arg) + height); |
| 3098 | } |
| 3099 | |
| 3100 | start = marker_position (w->start); |
| 3101 | XSETWINDOW (window, w); |
| 3102 | if (start < BEGV || start > ZV) |
| 3103 | { |
| 3104 | Fvertical_motion (make_number (- (height / 2)), window); |
| 3105 | Fset_marker (w->start, make_number (PT), w->buffer); |
| 3106 | w->start_at_line_beg = Fbolp (); |
| 3107 | w->force_start = Qt; |
| 3108 | } |
| 3109 | else |
| 3110 | SET_PT (start); |
| 3111 | |
| 3112 | return Fvertical_motion (arg, window); |
| 3113 | } |
| 3114 | \f |
| 3115 | struct save_window_data |
| 3116 | { |
| 3117 | EMACS_INT size_from_Lisp_Vector_struct; |
| 3118 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
| 3119 | Lisp_Object frame_width, frame_height, frame_menu_bar_lines; |
| 3120 | Lisp_Object selected_frame; |
| 3121 | Lisp_Object current_window; |
| 3122 | Lisp_Object current_buffer; |
| 3123 | Lisp_Object minibuf_scroll_window; |
| 3124 | Lisp_Object root_window; |
| 3125 | Lisp_Object focus_frame; |
| 3126 | /* Record the values of window-min-width and window-min-height |
| 3127 | so that window sizes remain consistent with them. */ |
| 3128 | Lisp_Object min_width, min_height; |
| 3129 | /* A vector, interpreted as a struct saved_window */ |
| 3130 | Lisp_Object saved_windows; |
| 3131 | }; |
| 3132 | |
| 3133 | /* This is saved as a Lisp_Vector */ |
| 3134 | struct saved_window |
| 3135 | { |
| 3136 | /* these first two must agree with struct Lisp_Vector in lisp.h */ |
| 3137 | EMACS_INT size_from_Lisp_Vector_struct; |
| 3138 | struct Lisp_Vector *next_from_Lisp_Vector_struct; |
| 3139 | |
| 3140 | Lisp_Object window; |
| 3141 | Lisp_Object buffer, start, pointm, mark; |
| 3142 | Lisp_Object left, top, width, height, hscroll; |
| 3143 | Lisp_Object parent, prev; |
| 3144 | Lisp_Object start_at_line_beg; |
| 3145 | Lisp_Object display_table; |
| 3146 | }; |
| 3147 | #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */ |
| 3148 | |
| 3149 | #define SAVED_WINDOW_N(swv,n) \ |
| 3150 | ((struct saved_window *) (XVECTOR ((swv)->contents[(n)]))) |
| 3151 | |
| 3152 | DEFUN ("window-configuration-p", Fwindow_configuration_p, Swindow_configuration_p, 1, 1, 0, |
| 3153 | "T if OBJECT is a window-configuration object.") |
| 3154 | (object) |
| 3155 | Lisp_Object object; |
| 3156 | { |
| 3157 | if (WINDOW_CONFIGURATIONP (object)) |
| 3158 | return Qt; |
| 3159 | return Qnil; |
| 3160 | } |
| 3161 | |
| 3162 | |
| 3163 | DEFUN ("set-window-configuration", Fset_window_configuration, |
| 3164 | Sset_window_configuration, 1, 1, 0, |
| 3165 | "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\ |
| 3166 | CONFIGURATION must be a value previously returned\n\ |
| 3167 | by `current-window-configuration' (which see).") |
| 3168 | (configuration) |
| 3169 | Lisp_Object configuration; |
| 3170 | { |
| 3171 | register struct save_window_data *data; |
| 3172 | struct Lisp_Vector *saved_windows; |
| 3173 | Lisp_Object new_current_buffer; |
| 3174 | Lisp_Object frame; |
| 3175 | FRAME_PTR f; |
| 3176 | |
| 3177 | while (!WINDOW_CONFIGURATIONP (configuration)) |
| 3178 | { |
| 3179 | configuration = wrong_type_argument (intern ("window-configuration-p"), |
| 3180 | configuration); |
| 3181 | } |
| 3182 | |
| 3183 | data = (struct save_window_data *) XVECTOR (configuration); |
| 3184 | saved_windows = XVECTOR (data->saved_windows); |
| 3185 | |
| 3186 | new_current_buffer = data->current_buffer; |
| 3187 | if (NILP (XBUFFER (new_current_buffer)->name)) |
| 3188 | new_current_buffer = Qnil; |
| 3189 | |
| 3190 | frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame; |
| 3191 | f = XFRAME (frame); |
| 3192 | |
| 3193 | /* If f is a dead frame, don't bother rebuilding its window tree. |
| 3194 | However, there is other stuff we should still try to do below. */ |
| 3195 | if (FRAME_LIVE_P (f)) |
| 3196 | { |
| 3197 | register struct window *w; |
| 3198 | register struct saved_window *p; |
| 3199 | int k; |
| 3200 | |
| 3201 | /* If the frame has been resized since this window configuration was |
| 3202 | made, we change the frame to the size specified in the |
| 3203 | configuration, restore the configuration, and then resize it |
| 3204 | back. We keep track of the prevailing height in these variables. */ |
| 3205 | int previous_frame_height = FRAME_HEIGHT (f); |
| 3206 | int previous_frame_width = FRAME_WIDTH (f); |
| 3207 | int previous_frame_menu_bar_lines = FRAME_MENU_BAR_LINES (f); |
| 3208 | |
| 3209 | if (XFASTINT (data->frame_height) != previous_frame_height |
| 3210 | || XFASTINT (data->frame_width) != previous_frame_width) |
| 3211 | change_frame_size (f, data->frame_height, data->frame_width, 0, 0); |
| 3212 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 3213 | if (XFASTINT (data->frame_menu_bar_lines) |
| 3214 | != previous_frame_menu_bar_lines) |
| 3215 | x_set_menu_bar_lines (f, data->frame_menu_bar_lines, 0); |
| 3216 | #endif |
| 3217 | |
| 3218 | windows_or_buffers_changed++; |
| 3219 | FRAME_WINDOW_SIZES_CHANGED (f) = 1; |
| 3220 | |
| 3221 | /* Temporarily avoid any problems with windows that are smaller |
| 3222 | than they are supposed to be. */ |
| 3223 | window_min_height = 1; |
| 3224 | window_min_width = 1; |
| 3225 | |
| 3226 | /* Kludge Alert! |
| 3227 | Mark all windows now on frame as "deleted". |
| 3228 | Restoring the new configuration "undeletes" any that are in it. |
| 3229 | |
| 3230 | Save their current buffers in their height fields, since we may |
| 3231 | need it later, if a buffer saved in the configuration is now |
| 3232 | dead. */ |
| 3233 | delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 3234 | |
| 3235 | for (k = 0; k < saved_windows->size; k++) |
| 3236 | { |
| 3237 | p = SAVED_WINDOW_N (saved_windows, k); |
| 3238 | w = XWINDOW (p->window); |
| 3239 | w->next = Qnil; |
| 3240 | |
| 3241 | if (!NILP (p->parent)) |
| 3242 | w->parent = SAVED_WINDOW_N (saved_windows, |
| 3243 | XFASTINT (p->parent))->window; |
| 3244 | else |
| 3245 | w->parent = Qnil; |
| 3246 | |
| 3247 | if (!NILP (p->prev)) |
| 3248 | { |
| 3249 | w->prev = SAVED_WINDOW_N (saved_windows, |
| 3250 | XFASTINT (p->prev))->window; |
| 3251 | XWINDOW (w->prev)->next = p->window; |
| 3252 | } |
| 3253 | else |
| 3254 | { |
| 3255 | w->prev = Qnil; |
| 3256 | if (!NILP (w->parent)) |
| 3257 | { |
| 3258 | if (EQ (p->width, XWINDOW (w->parent)->width)) |
| 3259 | { |
| 3260 | XWINDOW (w->parent)->vchild = p->window; |
| 3261 | XWINDOW (w->parent)->hchild = Qnil; |
| 3262 | } |
| 3263 | else |
| 3264 | { |
| 3265 | XWINDOW (w->parent)->hchild = p->window; |
| 3266 | XWINDOW (w->parent)->vchild = Qnil; |
| 3267 | } |
| 3268 | } |
| 3269 | } |
| 3270 | |
| 3271 | /* If we squirreled away the buffer in the window's height, |
| 3272 | restore it now. */ |
| 3273 | if (BUFFERP (w->height)) |
| 3274 | w->buffer = w->height; |
| 3275 | w->left = p->left; |
| 3276 | w->top = p->top; |
| 3277 | w->width = p->width; |
| 3278 | w->height = p->height; |
| 3279 | w->hscroll = p->hscroll; |
| 3280 | w->display_table = p->display_table; |
| 3281 | XSETFASTINT (w->last_modified, 0); |
| 3282 | XSETFASTINT (w->last_overlay_modified, 0); |
| 3283 | |
| 3284 | /* Reinstall the saved buffer and pointers into it. */ |
| 3285 | if (NILP (p->buffer)) |
| 3286 | w->buffer = p->buffer; |
| 3287 | else |
| 3288 | { |
| 3289 | if (!NILP (XBUFFER (p->buffer)->name)) |
| 3290 | /* If saved buffer is alive, install it. */ |
| 3291 | { |
| 3292 | w->buffer = p->buffer; |
| 3293 | w->start_at_line_beg = p->start_at_line_beg; |
| 3294 | set_marker_restricted (w->start, |
| 3295 | Fmarker_position (p->start), |
| 3296 | w->buffer); |
| 3297 | set_marker_restricted (w->pointm, |
| 3298 | Fmarker_position (p->pointm), |
| 3299 | w->buffer); |
| 3300 | Fset_marker (XBUFFER (w->buffer)->mark, |
| 3301 | Fmarker_position (p->mark), w->buffer); |
| 3302 | |
| 3303 | /* As documented in Fcurrent_window_configuration, don't |
| 3304 | save the location of point in the buffer which was current |
| 3305 | when the window configuration was recorded. */ |
| 3306 | if (!EQ (p->buffer, new_current_buffer) |
| 3307 | && XBUFFER (p->buffer) == current_buffer) |
| 3308 | Fgoto_char (w->pointm); |
| 3309 | } |
| 3310 | else if (NILP (w->buffer) || NILP (XBUFFER (w->buffer)->name)) |
| 3311 | /* Else unless window has a live buffer, get one. */ |
| 3312 | { |
| 3313 | w->buffer = Fcdr (Fcar (Vbuffer_alist)); |
| 3314 | /* This will set the markers to beginning of visible |
| 3315 | range. */ |
| 3316 | set_marker_restricted (w->start, make_number (0), w->buffer); |
| 3317 | set_marker_restricted (w->pointm, make_number (0),w->buffer); |
| 3318 | w->start_at_line_beg = Qt; |
| 3319 | } |
| 3320 | else |
| 3321 | /* Keeping window's old buffer; make sure the markers |
| 3322 | are real. */ |
| 3323 | { |
| 3324 | /* Set window markers at start of visible range. */ |
| 3325 | if (XMARKER (w->start)->buffer == 0) |
| 3326 | set_marker_restricted (w->start, make_number (0), |
| 3327 | w->buffer); |
| 3328 | if (XMARKER (w->pointm)->buffer == 0) |
| 3329 | set_marker_restricted (w->pointm, |
| 3330 | (make_number |
| 3331 | (BUF_PT (XBUFFER (w->buffer)))), |
| 3332 | w->buffer); |
| 3333 | w->start_at_line_beg = Qt; |
| 3334 | } |
| 3335 | } |
| 3336 | } |
| 3337 | |
| 3338 | FRAME_ROOT_WINDOW (f) = data->root_window; |
| 3339 | Fselect_window (data->current_window); |
| 3340 | |
| 3341 | if (NILP (data->focus_frame) |
| 3342 | || (FRAMEP (data->focus_frame) |
| 3343 | && FRAME_LIVE_P (XFRAME (data->focus_frame)))) |
| 3344 | Fredirect_frame_focus (frame, data->focus_frame); |
| 3345 | |
| 3346 | #if 0 /* I don't understand why this is needed, and it causes problems |
| 3347 | when the frame's old selected window has been deleted. */ |
| 3348 | if (f != selected_frame && FRAME_WINDOW_P (f)) |
| 3349 | do_switch_frame (WINDOW_FRAME (XWINDOW (data->root_window)), |
| 3350 | Qnil, 0); |
| 3351 | #endif |
| 3352 | |
| 3353 | /* Set the screen height to the value it had before this function. */ |
| 3354 | if (previous_frame_height != FRAME_HEIGHT (f) |
| 3355 | || previous_frame_width != FRAME_WIDTH (f)) |
| 3356 | change_frame_size (f, previous_frame_height, previous_frame_width, |
| 3357 | 0, 0); |
| 3358 | #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS) |
| 3359 | if (previous_frame_menu_bar_lines != FRAME_MENU_BAR_LINES (f)) |
| 3360 | x_set_menu_bar_lines (f, previous_frame_menu_bar_lines, 0); |
| 3361 | #endif |
| 3362 | } |
| 3363 | |
| 3364 | /* Restore the minimum heights recorded in the configuration. */ |
| 3365 | window_min_height = XINT (data->min_height); |
| 3366 | window_min_width = XINT (data->min_width); |
| 3367 | |
| 3368 | /* Fselect_window will have made f the selected frame, so we |
| 3369 | reselect the proper frame here. Fhandle_switch_frame will change the |
| 3370 | selected window too, but that doesn't make the call to |
| 3371 | Fselect_window above totally superfluous; it still sets f's |
| 3372 | selected window. */ |
| 3373 | if (FRAME_LIVE_P (XFRAME (data->selected_frame))) |
| 3374 | do_switch_frame (data->selected_frame, Qnil, 0); |
| 3375 | |
| 3376 | if (!NILP (new_current_buffer)) |
| 3377 | Fset_buffer (new_current_buffer); |
| 3378 | |
| 3379 | Vminibuf_scroll_window = data->minibuf_scroll_window; |
| 3380 | return (Qnil); |
| 3381 | } |
| 3382 | |
| 3383 | /* Mark all windows now on frame as deleted |
| 3384 | by setting their buffers to nil. */ |
| 3385 | |
| 3386 | void |
| 3387 | delete_all_subwindows (w) |
| 3388 | register struct window *w; |
| 3389 | { |
| 3390 | if (!NILP (w->next)) |
| 3391 | delete_all_subwindows (XWINDOW (w->next)); |
| 3392 | if (!NILP (w->vchild)) |
| 3393 | delete_all_subwindows (XWINDOW (w->vchild)); |
| 3394 | if (!NILP (w->hchild)) |
| 3395 | delete_all_subwindows (XWINDOW (w->hchild)); |
| 3396 | |
| 3397 | w->height = w->buffer; /* See Fset_window_configuration for excuse. */ |
| 3398 | |
| 3399 | if (!NILP (w->buffer)) |
| 3400 | unshow_buffer (w); |
| 3401 | |
| 3402 | /* We set all three of these fields to nil, to make sure that we can |
| 3403 | distinguish this dead window from any live window. Live leaf |
| 3404 | windows will have buffer set, and combination windows will have |
| 3405 | vchild or hchild set. */ |
| 3406 | w->buffer = Qnil; |
| 3407 | w->vchild = Qnil; |
| 3408 | w->hchild = Qnil; |
| 3409 | } |
| 3410 | \f |
| 3411 | static int |
| 3412 | count_windows (window) |
| 3413 | register struct window *window; |
| 3414 | { |
| 3415 | register int count = 1; |
| 3416 | if (!NILP (window->next)) |
| 3417 | count += count_windows (XWINDOW (window->next)); |
| 3418 | if (!NILP (window->vchild)) |
| 3419 | count += count_windows (XWINDOW (window->vchild)); |
| 3420 | if (!NILP (window->hchild)) |
| 3421 | count += count_windows (XWINDOW (window->hchild)); |
| 3422 | return count; |
| 3423 | } |
| 3424 | |
| 3425 | static int |
| 3426 | save_window_save (window, vector, i) |
| 3427 | Lisp_Object window; |
| 3428 | struct Lisp_Vector *vector; |
| 3429 | int i; |
| 3430 | { |
| 3431 | register struct saved_window *p; |
| 3432 | register struct window *w; |
| 3433 | register Lisp_Object tem; |
| 3434 | |
| 3435 | for (;!NILP (window); window = w->next) |
| 3436 | { |
| 3437 | p = SAVED_WINDOW_N (vector, i); |
| 3438 | w = XWINDOW (window); |
| 3439 | |
| 3440 | XSETFASTINT (w->temslot, i++); |
| 3441 | p->window = window; |
| 3442 | p->buffer = w->buffer; |
| 3443 | p->left = w->left; |
| 3444 | p->top = w->top; |
| 3445 | p->width = w->width; |
| 3446 | p->height = w->height; |
| 3447 | p->hscroll = w->hscroll; |
| 3448 | p->display_table = w->display_table; |
| 3449 | if (!NILP (w->buffer)) |
| 3450 | { |
| 3451 | /* Save w's value of point in the window configuration. |
| 3452 | If w is the selected window, then get the value of point |
| 3453 | from the buffer; pointm is garbage in the selected window. */ |
| 3454 | if (EQ (window, selected_window)) |
| 3455 | { |
| 3456 | p->pointm = Fmake_marker (); |
| 3457 | Fset_marker (p->pointm, BUF_PT (XBUFFER (w->buffer)), |
| 3458 | w->buffer); |
| 3459 | } |
| 3460 | else |
| 3461 | p->pointm = Fcopy_marker (w->pointm, Qnil); |
| 3462 | |
| 3463 | p->start = Fcopy_marker (w->start, Qnil); |
| 3464 | p->start_at_line_beg = w->start_at_line_beg; |
| 3465 | |
| 3466 | tem = XBUFFER (w->buffer)->mark; |
| 3467 | p->mark = Fcopy_marker (tem, Qnil); |
| 3468 | } |
| 3469 | else |
| 3470 | { |
| 3471 | p->pointm = Qnil; |
| 3472 | p->start = Qnil; |
| 3473 | p->mark = Qnil; |
| 3474 | p->start_at_line_beg = Qnil; |
| 3475 | } |
| 3476 | |
| 3477 | if (NILP (w->parent)) |
| 3478 | p->parent = Qnil; |
| 3479 | else |
| 3480 | p->parent = XWINDOW (w->parent)->temslot; |
| 3481 | |
| 3482 | if (NILP (w->prev)) |
| 3483 | p->prev = Qnil; |
| 3484 | else |
| 3485 | p->prev = XWINDOW (w->prev)->temslot; |
| 3486 | |
| 3487 | if (!NILP (w->vchild)) |
| 3488 | i = save_window_save (w->vchild, vector, i); |
| 3489 | if (!NILP (w->hchild)) |
| 3490 | i = save_window_save (w->hchild, vector, i); |
| 3491 | } |
| 3492 | |
| 3493 | return i; |
| 3494 | } |
| 3495 | |
| 3496 | DEFUN ("current-window-configuration", Fcurrent_window_configuration, |
| 3497 | Scurrent_window_configuration, 0, 1, 0, |
| 3498 | "Return an object representing the current window configuration of FRAME.\n\ |
| 3499 | If FRAME is nil or omitted, use the selected frame.\n\ |
| 3500 | This describes the number of windows, their sizes and current buffers,\n\ |
| 3501 | and for each displayed buffer, where display starts, and the positions of\n\ |
| 3502 | point and mark. An exception is made for point in the current buffer:\n\ |
| 3503 | its value is -not- saved.\n\ |
| 3504 | This also records the currently selected frame, and FRAME's focus\n\ |
| 3505 | redirection (see `redirect-frame-focus').") |
| 3506 | (frame) |
| 3507 | Lisp_Object frame; |
| 3508 | { |
| 3509 | register Lisp_Object tem; |
| 3510 | register int n_windows; |
| 3511 | register struct save_window_data *data; |
| 3512 | register struct Lisp_Vector *vec; |
| 3513 | register int i; |
| 3514 | FRAME_PTR f; |
| 3515 | |
| 3516 | if (NILP (frame)) |
| 3517 | f = selected_frame; |
| 3518 | else |
| 3519 | { |
| 3520 | CHECK_LIVE_FRAME (frame, 0); |
| 3521 | f = XFRAME (frame); |
| 3522 | } |
| 3523 | |
| 3524 | n_windows = count_windows (XWINDOW (FRAME_ROOT_WINDOW (f))); |
| 3525 | vec = allocate_vectorlike (VECSIZE (struct save_window_data)); |
| 3526 | for (i = 0; i < VECSIZE (struct save_window_data); i++) |
| 3527 | vec->contents[i] = Qnil; |
| 3528 | vec->size = VECSIZE (struct save_window_data); |
| 3529 | data = (struct save_window_data *)vec; |
| 3530 | |
| 3531 | XSETFASTINT (data->frame_width, FRAME_WIDTH (f)); |
| 3532 | XSETFASTINT (data->frame_height, FRAME_HEIGHT (f)); |
| 3533 | XSETFASTINT (data->frame_menu_bar_lines, FRAME_MENU_BAR_LINES (f)); |
| 3534 | XSETFRAME (data->selected_frame, selected_frame); |
| 3535 | data->current_window = FRAME_SELECTED_WINDOW (f); |
| 3536 | XSETBUFFER (data->current_buffer, current_buffer); |
| 3537 | data->minibuf_scroll_window = Vminibuf_scroll_window; |
| 3538 | data->root_window = FRAME_ROOT_WINDOW (f); |
| 3539 | data->focus_frame = FRAME_FOCUS_FRAME (f); |
| 3540 | XSETINT (data->min_height, window_min_height); |
| 3541 | XSETINT (data->min_width, window_min_width); |
| 3542 | tem = Fmake_vector (make_number (n_windows), Qnil); |
| 3543 | data->saved_windows = tem; |
| 3544 | for (i = 0; i < n_windows; i++) |
| 3545 | XVECTOR (tem)->contents[i] |
| 3546 | = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE), Qnil); |
| 3547 | save_window_save (FRAME_ROOT_WINDOW (f), |
| 3548 | XVECTOR (tem), 0); |
| 3549 | XSETWINDOW_CONFIGURATION (tem, data); |
| 3550 | return (tem); |
| 3551 | } |
| 3552 | |
| 3553 | DEFUN ("save-window-excursion", Fsave_window_excursion, Ssave_window_excursion, |
| 3554 | 0, UNEVALLED, 0, |
| 3555 | "Execute body, preserving window sizes and contents.\n\ |
| 3556 | Restore which buffer appears in which window, where display starts,\n\ |
| 3557 | and the value of point and mark for each window.\n\ |
| 3558 | Also restore which buffer is current.\n\ |
| 3559 | But do not preserve point in the current buffer.\n\ |
| 3560 | Does not restore the value of point in current buffer.") |
| 3561 | (args) |
| 3562 | Lisp_Object args; |
| 3563 | { |
| 3564 | register Lisp_Object val; |
| 3565 | register int count = specpdl_ptr - specpdl; |
| 3566 | |
| 3567 | record_unwind_protect (Fset_window_configuration, |
| 3568 | Fcurrent_window_configuration (Qnil)); |
| 3569 | val = Fprogn (args); |
| 3570 | return unbind_to (count, val); |
| 3571 | } |
| 3572 | \f |
| 3573 | init_window_once () |
| 3574 | { |
| 3575 | selected_frame = make_terminal_frame (); |
| 3576 | XSETFRAME (Vterminal_frame, selected_frame); |
| 3577 | minibuf_window = selected_frame->minibuffer_window; |
| 3578 | selected_window = selected_frame->selected_window; |
| 3579 | last_nonminibuf_frame = selected_frame; |
| 3580 | |
| 3581 | window_initialized = 1; |
| 3582 | } |
| 3583 | |
| 3584 | syms_of_window () |
| 3585 | { |
| 3586 | Qwindowp = intern ("windowp"); |
| 3587 | staticpro (&Qwindowp); |
| 3588 | |
| 3589 | Qwindow_live_p = intern ("window-live-p"); |
| 3590 | staticpro (&Qwindow_live_p); |
| 3591 | |
| 3592 | Qtemp_buffer_show_hook = intern ("temp-buffer-show-hook"); |
| 3593 | staticpro (&Qtemp_buffer_show_hook); |
| 3594 | |
| 3595 | DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function, |
| 3596 | "Non-nil means call as function to display a help buffer.\n\ |
| 3597 | The function is called with one argument, the buffer to be displayed.\n\ |
| 3598 | Used by `with-output-to-temp-buffer'.\n\ |
| 3599 | If this function is used, then it must do the entire job of showing\n\ |
| 3600 | the buffer; `temp-buffer-show-hook' is not run unless this function runs it."); |
| 3601 | Vtemp_buffer_show_function = Qnil; |
| 3602 | |
| 3603 | DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function, |
| 3604 | "If non-nil, function to call to handle `display-buffer'.\n\ |
| 3605 | It will receive two args, the buffer and a flag which if non-nil means\n\ |
| 3606 | that the currently selected window is not acceptable.\n\ |
| 3607 | Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\ |
| 3608 | work using this function."); |
| 3609 | Vdisplay_buffer_function = Qnil; |
| 3610 | |
| 3611 | DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window, |
| 3612 | "Non-nil means it is the window that C-M-v in minibuffer should scroll."); |
| 3613 | Vminibuf_scroll_window = Qnil; |
| 3614 | |
| 3615 | DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer, |
| 3616 | "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window."); |
| 3617 | Vother_window_scroll_buffer = Qnil; |
| 3618 | |
| 3619 | DEFVAR_BOOL ("pop-up-frames", &pop_up_frames, |
| 3620 | "*Non-nil means `display-buffer' should make a separate frame."); |
| 3621 | pop_up_frames = 0; |
| 3622 | |
| 3623 | DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function, |
| 3624 | "Function to call to handle automatic new frame creation.\n\ |
| 3625 | It is called with no arguments and should return a newly created frame.\n\ |
| 3626 | \n\ |
| 3627 | A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\ |
| 3628 | where `pop-up-frame-alist' would hold the default frame parameters."); |
| 3629 | Vpop_up_frame_function = Qnil; |
| 3630 | |
| 3631 | DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names, |
| 3632 | "*List of buffer names that should have their own special frames.\n\ |
| 3633 | Displaying a buffer whose name is in this list makes a special frame for it\n\ |
| 3634 | using `special-display-function'. See also `special-display-regexps'.\n\ |
| 3635 | \n\ |
| 3636 | An element of the list can be a list instead of just a string.\n\ |
| 3637 | There are two ways to use a list as an element:\n\ |
| 3638 | (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\ |
| 3639 | In the first case, FRAME-PARAMETERS are used to create the frame.\n\ |
| 3640 | In the latter case, FUNCTION is called with BUFFER as the first argument,\n\ |
| 3641 | followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\ |
| 3642 | All this is done by the function found in `special-display-function'."); |
| 3643 | Vspecial_display_buffer_names = Qnil; |
| 3644 | |
| 3645 | DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps, |
| 3646 | "*List of regexps saying which buffers should have their own special frames.\n\ |
| 3647 | If a buffer name matches one of these regexps, it gets its own frame.\n\ |
| 3648 | Displaying a buffer whose name is in this list makes a special frame for it\n\ |
| 3649 | using `special-display-function'.\n\ |
| 3650 | \n\ |
| 3651 | An element of the list can be a list instead of just a string.\n\ |
| 3652 | There are two ways to use a list as an element:\n\ |
| 3653 | (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\ |
| 3654 | In the first case, FRAME-PARAMETERS are used to create the frame.\n\ |
| 3655 | In the latter case, FUNCTION is called with the buffer as first argument,\n\ |
| 3656 | followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\ |
| 3657 | All this is done by the function found in `special-display-function'."); |
| 3658 | Vspecial_display_regexps = Qnil; |
| 3659 | |
| 3660 | DEFVAR_LISP ("special-display-function", &Vspecial_display_function, |
| 3661 | "Function to call to make a new frame for a special buffer.\n\ |
| 3662 | It is called with two arguments, the buffer and optional buffer specific\n\ |
| 3663 | data, and should return a window displaying that buffer.\n\ |
| 3664 | The default value makes a separate frame for the buffer,\n\ |
| 3665 | using `special-display-frame-alist' to specify the frame parameters.\n\ |
| 3666 | \n\ |
| 3667 | A buffer is special if its is listed in `special-display-buffer-names'\n\ |
| 3668 | or matches a regexp in `special-display-regexps'."); |
| 3669 | Vspecial_display_function = Qnil; |
| 3670 | |
| 3671 | DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names, |
| 3672 | "*List of buffer names that should appear in the selected window.\n\ |
| 3673 | Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\ |
| 3674 | switches to it in the selected window, rather than making it appear\n\ |
| 3675 | in some other window.\n\ |
| 3676 | \n\ |
| 3677 | An element of the list can be a cons cell instead of just a string.\n\ |
| 3678 | Then the car must be a string, which specifies the buffer name.\n\ |
| 3679 | This is for compatibility with `special-display-buffer-names';\n\ |
| 3680 | the cdr of the cons cell is ignored.\n\ |
| 3681 | \n\ |
| 3682 | See also `same-window-regexps'."); |
| 3683 | Vsame_window_buffer_names = Qnil; |
| 3684 | |
| 3685 | DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps, |
| 3686 | "*List of regexps saying which buffers should appear in the selected window.\n\ |
| 3687 | If a buffer name matches one of these regexps, then displaying it\n\ |
| 3688 | using `display-buffer' or `pop-to-buffer' switches to it\n\ |
| 3689 | in the selected window, rather than making it appear in some other window.\n\ |
| 3690 | \n\ |
| 3691 | An element of the list can be a cons cell instead of just a string.\n\ |
| 3692 | Then the car must be a string, which specifies the buffer name.\n\ |
| 3693 | This is for compatibility with `special-display-buffer-names';\n\ |
| 3694 | the cdr of the cons cell is ignored.\n\ |
| 3695 | \n\ |
| 3696 | See also `same-window-buffer-names'."); |
| 3697 | Vsame_window_regexps = Qnil; |
| 3698 | |
| 3699 | DEFVAR_BOOL ("pop-up-windows", &pop_up_windows, |
| 3700 | "*Non-nil means display-buffer should make new windows."); |
| 3701 | pop_up_windows = 1; |
| 3702 | |
| 3703 | DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines, |
| 3704 | "*Number of lines of continuity when scrolling by screenfuls."); |
| 3705 | next_screen_context_lines = 2; |
| 3706 | |
| 3707 | DEFVAR_INT ("split-height-threshold", &split_height_threshold, |
| 3708 | "*display-buffer would prefer to split the largest window if this large.\n\ |
| 3709 | If there is only one window, it is split regardless of this value."); |
| 3710 | split_height_threshold = 500; |
| 3711 | |
| 3712 | DEFVAR_INT ("window-min-height", &window_min_height, |
| 3713 | "*Delete any window less than this tall (including its mode line)."); |
| 3714 | window_min_height = 4; |
| 3715 | |
| 3716 | DEFVAR_INT ("window-min-width", &window_min_width, |
| 3717 | "*Delete any window less than this wide."); |
| 3718 | window_min_width = 10; |
| 3719 | |
| 3720 | DEFVAR_BOOL ("scroll-preserve-screen-position", |
| 3721 | &scroll_preserve_screen_position, |
| 3722 | "*Nonzero means scroll commands move point to keep its screen line unchanged."); |
| 3723 | scroll_preserve_screen_position = 0; |
| 3724 | |
| 3725 | defsubr (&Sselected_window); |
| 3726 | defsubr (&Sminibuffer_window); |
| 3727 | defsubr (&Swindow_minibuffer_p); |
| 3728 | defsubr (&Swindowp); |
| 3729 | defsubr (&Swindow_live_p); |
| 3730 | defsubr (&Spos_visible_in_window_p); |
| 3731 | defsubr (&Swindow_buffer); |
| 3732 | defsubr (&Swindow_height); |
| 3733 | defsubr (&Swindow_width); |
| 3734 | defsubr (&Swindow_hscroll); |
| 3735 | defsubr (&Sset_window_hscroll); |
| 3736 | defsubr (&Swindow_redisplay_end_trigger); |
| 3737 | defsubr (&Sset_window_redisplay_end_trigger); |
| 3738 | defsubr (&Swindow_edges); |
| 3739 | defsubr (&Scoordinates_in_window_p); |
| 3740 | defsubr (&Swindow_at); |
| 3741 | defsubr (&Swindow_point); |
| 3742 | defsubr (&Swindow_start); |
| 3743 | defsubr (&Swindow_end); |
| 3744 | defsubr (&Sset_window_point); |
| 3745 | defsubr (&Sset_window_start); |
| 3746 | defsubr (&Swindow_dedicated_p); |
| 3747 | defsubr (&Sset_window_dedicated_p); |
| 3748 | defsubr (&Swindow_display_table); |
| 3749 | defsubr (&Sset_window_display_table); |
| 3750 | defsubr (&Snext_window); |
| 3751 | defsubr (&Sprevious_window); |
| 3752 | defsubr (&Sother_window); |
| 3753 | defsubr (&Sget_lru_window); |
| 3754 | defsubr (&Sget_largest_window); |
| 3755 | defsubr (&Sget_buffer_window); |
| 3756 | defsubr (&Sdelete_other_windows); |
| 3757 | defsubr (&Sdelete_windows_on); |
| 3758 | defsubr (&Sreplace_buffer_in_windows); |
| 3759 | defsubr (&Sdelete_window); |
| 3760 | defsubr (&Sset_window_buffer); |
| 3761 | defsubr (&Sselect_window); |
| 3762 | defsubr (&Sspecial_display_p); |
| 3763 | defsubr (&Ssame_window_p); |
| 3764 | defsubr (&Sdisplay_buffer); |
| 3765 | defsubr (&Ssplit_window); |
| 3766 | defsubr (&Senlarge_window); |
| 3767 | defsubr (&Sshrink_window); |
| 3768 | defsubr (&Sscroll_up); |
| 3769 | defsubr (&Sscroll_down); |
| 3770 | defsubr (&Sscroll_left); |
| 3771 | defsubr (&Sscroll_right); |
| 3772 | defsubr (&Sother_window_for_scrolling); |
| 3773 | defsubr (&Sscroll_other_window); |
| 3774 | defsubr (&Srecenter); |
| 3775 | defsubr (&Smove_to_window_line); |
| 3776 | defsubr (&Swindow_configuration_p); |
| 3777 | defsubr (&Sset_window_configuration); |
| 3778 | defsubr (&Scurrent_window_configuration); |
| 3779 | defsubr (&Ssave_window_excursion); |
| 3780 | } |
| 3781 | |
| 3782 | keys_of_window () |
| 3783 | { |
| 3784 | initial_define_key (control_x_map, '1', "delete-other-windows"); |
| 3785 | initial_define_key (control_x_map, '2', "split-window"); |
| 3786 | initial_define_key (control_x_map, '0', "delete-window"); |
| 3787 | initial_define_key (control_x_map, 'o', "other-window"); |
| 3788 | initial_define_key (control_x_map, '^', "enlarge-window"); |
| 3789 | initial_define_key (control_x_map, '<', "scroll-left"); |
| 3790 | initial_define_key (control_x_map, '>', "scroll-right"); |
| 3791 | |
| 3792 | initial_define_key (global_map, Ctl ('V'), "scroll-up"); |
| 3793 | initial_define_key (meta_map, Ctl ('V'), "scroll-other-window"); |
| 3794 | initial_define_key (meta_map, 'v', "scroll-down"); |
| 3795 | |
| 3796 | initial_define_key (global_map, Ctl('L'), "recenter"); |
| 3797 | initial_define_key (meta_map, 'r', "move-to-window-line"); |
| 3798 | } |