window.c 211 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1 2
/* Window creation, deletion and examination for GNU Emacs.
   Does not include redisplay.
3
   Copyright (C) 1985-1987, 1993-1998, 2000-2011
Glenn Morris's avatar
Glenn Morris committed
4
                 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
5 6 7

This file is part of GNU Emacs.

8
GNU Emacs is free software: you can redistribute it and/or modify
Jim Blandy's avatar
Jim Blandy committed
9
it under the terms of the GNU General Public License as published by
10 11
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Jim Blandy's avatar
Jim Blandy committed
12 13 14 15 16 17 18

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
19
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Jim Blandy's avatar
Jim Blandy committed
20

21
#include <config.h>
22
#include <stdio.h>
23
#include <setjmp.h>
24

Jim Blandy's avatar
Jim Blandy committed
25 26
#include "lisp.h"
#include "buffer.h"
27
#include "keyboard.h"
Stefan Monnier's avatar
Stefan Monnier committed
28
#include "keymap.h"
Jim Blandy's avatar
Jim Blandy committed
29
#include "frame.h"
Jim Blandy's avatar
Jim Blandy committed
30 31 32 33 34
#include "window.h"
#include "commands.h"
#include "indent.h"
#include "termchar.h"
#include "disptab.h"
Andreas Schwab's avatar
Andreas Schwab committed
35
#include "dispextern.h"
36 37
#include "blockinput.h"
#include "intervals.h"
38
#include "termhooks.h"		/* For FRAME_TERMINAL.  */
39

40
#ifdef HAVE_X_WINDOWS
Andreas Schwab's avatar
Andreas Schwab committed
41
#include "xterm.h"
42
#endif	/* HAVE_X_WINDOWS */
Andrew Innes's avatar
Andrew Innes committed
43 44 45
#ifdef WINDOWSNT
#include "w32term.h"
#endif
46 47 48
#ifdef MSDOS
#include "msdos.h"
#endif
49 50 51
#ifdef HAVE_NS
#include "nsterm.h"
#endif
52

53
Lisp_Object Qwindowp, Qwindow_live_p;
Martin Rudalics's avatar
Martin Rudalics committed
54
static Lisp_Object Qwindow_configuration_p, Qrecord_window_buffer;
55
static Lisp_Object Qwindow_deletable_p, Qdelete_window, Qdisplay_buffer;
Martin Rudalics's avatar
Martin Rudalics committed
56
static Lisp_Object Qreplace_buffer_in_windows, Qget_mru_window;
57
static Lisp_Object Qwindow_resize_root_window, Qwindow_resize_root_window_vertically;
58
static Lisp_Object Qscroll_up, Qscroll_down, Qscroll_command;
Martin Rudalics's avatar
Martin Rudalics committed
59 60 61
static Lisp_Object Qsafe, Qabove, Qbelow;
static Lisp_Object Qauto_buffer_name;

62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
static int displayed_window_lines (struct window *);
static struct window *decode_window (Lisp_Object);
static int count_windows (struct window *);
static int get_leaf_windows (struct window *, struct window **, int);
static void window_scroll (Lisp_Object, int, int, int);
static void window_scroll_pixel_based (Lisp_Object, int, int, int);
static void window_scroll_line_based (Lisp_Object, int, int, int);
static int freeze_window_start (struct window *, void *);
static Lisp_Object window_list (void);
static int add_window_to_list (struct window *, void *);
static int candidate_window_p (Lisp_Object, Lisp_Object, Lisp_Object,
                               Lisp_Object);
static Lisp_Object next_window (Lisp_Object, Lisp_Object,
                                Lisp_Object, int);
static void decode_next_window_args (Lisp_Object *, Lisp_Object *,
                                     Lisp_Object *);
Andreas Schwab's avatar
Andreas Schwab committed
78
static void foreach_window (struct frame *,
79
				 int (* fn) (struct window *, void *),
Andreas Schwab's avatar
Andreas Schwab committed
80
                            void *);
81 82 83 84
static int foreach_window_1 (struct window *,
                             int (* fn) (struct window *, void *),
                             void *);
static Lisp_Object window_list_1 (Lisp_Object, Lisp_Object, Lisp_Object);
85 86
static int window_resize_check (struct window *, int);
static void window_resize_apply (struct window *, int);
Glenn Morris's avatar
Glenn Morris committed
87
static Lisp_Object select_window (Lisp_Object, Lisp_Object, int);
88

Jim Blandy's avatar
Jim Blandy committed
89 90 91 92 93 94
/* This is the window in which the terminal's cursor should
   be left when nothing is being done with it.  This must
   always be a leaf window, and its buffer is selected by
   the top level editing loop at the end of each command.

   This value is always the same as
Jim Blandy's avatar
Jim Blandy committed
95
   FRAME_SELECTED_WINDOW (selected_frame).  */
Jim Blandy's avatar
Jim Blandy committed
96 97
Lisp_Object selected_window;

Gerd Moellmann's avatar
Gerd Moellmann committed
98 99 100 101 102
/* A list of all windows for use by next_window and Fwindow_list.
   Functions creating or deleting windows should invalidate this cache
   by setting it to nil.  */
Lisp_Object Vwindow_list;

103 104 105
/* The mini-buffer window of the selected frame.
   Note that you cannot test for mini-bufferness of an arbitrary window
   by comparing against this; but you can test for mini-bufferness of
Jim Blandy's avatar
Jim Blandy committed
106 107 108
   the selected window.  */
Lisp_Object minibuf_window;

109 110
/* Non-nil means it is the window whose mode line should be
   shown as the selected window when the minibuffer is selected.  */
111
Lisp_Object minibuf_selected_window;
112

113
/* Hook run at end of temp_output_buffer_show.  */
114
static Lisp_Object Qtemp_buffer_show_hook;
115

Jim Blandy's avatar
Jim Blandy committed
116 117 118
/* Incremented for each window created.  */
static int sequence_number;

119 120 121
/* Nonzero after init_window_once has finished.  */
static int window_initialized;

122
/* Hook to run when window config changes.  */
123
static Lisp_Object Qwindow_configuration_change_hook;
124

125
/* Used by the function window_scroll_pixel_based */
126
static int window_scroll_pixel_based_preserve_x;
127
static int window_scroll_pixel_based_preserve_y;
128

129 130 131
/* Same for window_scroll_line_based.  */
static int window_scroll_preserve_hpos;
static int window_scroll_preserve_vpos;
132 133 134 135 136 137

static struct window *
decode_window (register Lisp_Object window)
{
  if (NILP (window))
    return XWINDOW (selected_window);
138

139 140 141 142 143 144 145 146 147 148 149 150 151
  CHECK_LIVE_WINDOW (window);
  return XWINDOW (window);
}

static struct window *
decode_any_window (register Lisp_Object window)
{
  if (NILP (window))
    return XWINDOW (selected_window);

  CHECK_WINDOW (window);
  return XWINDOW (window);
}
152

Jim Blandy's avatar
Jim Blandy committed
153
DEFUN ("windowp", Fwindowp, Swindowp, 1, 1, 0,
154
       doc: /* Return t if OBJECT is a window and nil otherwise.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
155
  (Lisp_Object object)
Jim Blandy's avatar
Jim Blandy committed
156
{
157
  return WINDOWP (object) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
158 159
}

160
DEFUN ("window-live-p", Fwindow_live_p, Swindow_live_p, 1, 1, 0,
161 162
       doc: /* Return t if OBJECT is a live window and nil otherwise.
A live window is a window that displays a buffer.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
163
  (Lisp_Object object)
164
{
165
  return WINDOW_LIVE_P (object) ? Qt : Qnil;
166
}
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312

/* Frames and windows.  */
DEFUN ("window-frame", Fwindow_frame, Swindow_frame, 1, 1, 0,
       doc: /* Return the frame that window WINDOW is on.
WINDOW can be any window and defaults to the selected one.  */)
  (Lisp_Object window)
{
  return decode_any_window (window)->frame;
}

DEFUN ("frame-root-window", Fframe_root_window, Sframe_root_window, 0, 1, 0,
       doc: /* Return the root window of FRAME_OR_WINDOW.
If omitted, FRAME_OR_WINDOW defaults to the currently selected frame.
Else if FRAME_OR_WINDOW denotes any window, return the root window of
that window's frame.  If FRAME_OR_WINDOW denotes a live frame, return
the root window of that frame.  */)
  (Lisp_Object frame_or_window)
{
  Lisp_Object window;

  if (NILP (frame_or_window))
    window = SELECTED_FRAME ()->root_window;
  else if (WINDOWP (frame_or_window))
    window = XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window)))->root_window;
  else
    {
      CHECK_LIVE_FRAME (frame_or_window);
      window = XFRAME (frame_or_window)->root_window;
    }

  return window;
}

DEFUN ("minibuffer-window", Fminibuffer_window, Sminibuffer_window, 0, 1, 0,
       doc: /* Return the window used now for minibuffers.
If the optional argument FRAME is specified, return the minibuffer window
used by that frame.  */)
  (Lisp_Object frame)
{
  if (NILP (frame))
    frame = selected_frame;
  CHECK_LIVE_FRAME (frame);
  return FRAME_MINIBUF_WINDOW (XFRAME (frame));
}

DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p,
       Swindow_minibuffer_p, 0, 1, 0,
       doc: /* Return non-nil if WINDOW is a minibuffer window.
WINDOW can be any window and defaults to the selected one.  */)
  (Lisp_Object window)
{
  return MINI_WINDOW_P (decode_any_window (window)) ? Qt : Qnil;
}

/* Don't move this to window.el - this must be a safe routine.  */
DEFUN ("frame-first-window", Fframe_first_window, Sframe_first_window, 0, 1, 0,
       doc: /* Return the topmost, leftmost live window on FRAME_OR_WINDOW.
If omitted, FRAME_OR_WINDOW defaults to the currently selected frame.
Else if FRAME_OR_WINDOW denotes any window, return the first window of
that window's frame.  If FRAME_OR_WINDOW denotes a live frame, return
the first window of that frame.  */)
  (Lisp_Object frame_or_window)
{
  Lisp_Object window;

  if (NILP (frame_or_window))
    window = SELECTED_FRAME ()->root_window;
  else if (WINDOWP (frame_or_window))
    window = XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window)))->root_window;
  else
    {
      CHECK_LIVE_FRAME (frame_or_window);
      window = XFRAME (frame_or_window)->root_window;
    }

  while (NILP (XWINDOW (window)->buffer))
    {
      if (! NILP (XWINDOW (window)->hchild))
	window = XWINDOW (window)->hchild;
      else if (! NILP (XWINDOW (window)->vchild))
	window = XWINDOW (window)->vchild;
      else
	abort ();
    }

  return window;
}

DEFUN ("frame-selected-window", Fframe_selected_window,
       Sframe_selected_window, 0, 1, 0,
       doc: /* Return the selected window of FRAME_OR_WINDOW.
If omitted, FRAME_OR_WINDOW defaults to the currently selected frame.
Else if FRAME_OR_WINDOW denotes any window, return the selected window
of that window's frame.  If FRAME_OR_WINDOW denotes a live frame, return
the selected window of that frame.  */)
  (Lisp_Object frame_or_window)
{
  Lisp_Object window;

  if (NILP (frame_or_window))
    window = SELECTED_FRAME ()->selected_window;
  else if (WINDOWP (frame_or_window))
    window = XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window)))->selected_window;
  else
    {
      CHECK_LIVE_FRAME (frame_or_window);
      window = XFRAME (frame_or_window)->selected_window;
    }

  return window;
}

DEFUN ("set-frame-selected-window", Fset_frame_selected_window,
       Sset_frame_selected_window, 2, 3, 0,
       doc: /* Set selected window of FRAME to WINDOW.
FRAME must be a live frame and defaults to the selected one.  If FRAME
is the selected frame, this makes WINDOW the selected window.  Optional
argument NORECORD non-nil means to neither change the order of recently
selected windows nor the buffer list.  WINDOW must denote a live window.
Return WINDOW.  */)
  (Lisp_Object frame, Lisp_Object window, Lisp_Object norecord)
{
  if (NILP (frame))
    frame = selected_frame;

  CHECK_LIVE_FRAME (frame);
  CHECK_LIVE_WINDOW (window);

  if (! EQ (frame, WINDOW_FRAME (XWINDOW (window))))
    error ("In `set-frame-selected-window', WINDOW is not on FRAME");

  if (EQ (frame, selected_frame))
    return Fselect_window (window, norecord);
  else
    return XFRAME (frame)->selected_window = window;
}

DEFUN ("selected-window", Fselected_window, Sselected_window, 0, 0, 0,
       doc: /* Return the selected window.
The selected window is the window in which the standard cursor for
selected windows appears and to which many commands apply.  */)
  (void)
{
  return selected_window;
}

313 314
int window_select_count;

315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402
/* If select_window is called with inhibit_point_swap non-zero it will
   not store point of the old selected window's buffer back into that
   window's pointm slot.  This is needed by Fset_window_configuration to
   avoid that the display routine is called with selected_window set to
   Qnil causing a subsequent crash.  */
static Lisp_Object
select_window (Lisp_Object window, Lisp_Object norecord, int inhibit_point_swap)
{
  register struct window *w;
  register struct window *ow;
  struct frame *sf;

  CHECK_LIVE_WINDOW (window);

  w = XWINDOW (window);
  w->frozen_window_start_p = 0;

  if (NILP (norecord))
    {
      ++window_select_count;
      XSETFASTINT (w->use_time, window_select_count);
      record_buffer (w->buffer);
    }

  if (EQ (window, selected_window) && !inhibit_point_swap)
    return window;

  sf = SELECTED_FRAME ();
  if (XFRAME (WINDOW_FRAME (w)) != sf)
    {
      XFRAME (WINDOW_FRAME (w))->selected_window = window;
      /* Use this rather than Fhandle_switch_frame
	 so that FRAME_FOCUS_FRAME is moved appropriately as we
	 move around in the state where a minibuffer in a separate
	 frame is active.  */
      Fselect_frame (WINDOW_FRAME (w), norecord);
      /* Fselect_frame called us back so we've done all the work already.  */
      eassert (EQ (window, selected_window));
      return window;
    }
  else
    sf->selected_window = window;

  /* Store the current buffer's actual point into the
     old selected window.  It belongs to that window,
     and when the window is not selected, must be in the window.  */
  if (!inhibit_point_swap)
    {
      ow = XWINDOW (selected_window);
      if (! NILP (ow->buffer))
	set_marker_both (ow->pointm, ow->buffer,
			 BUF_PT (XBUFFER (ow->buffer)),
			 BUF_PT_BYTE (XBUFFER (ow->buffer)));
    }

  selected_window = window;

  Fset_buffer (w->buffer);

  BVAR (XBUFFER (w->buffer), last_selected_window) = window;

  /* Go to the point recorded in the window.
     This is important when the buffer is in more
     than one window.  It also matters when
     redisplay_window has altered point after scrolling,
     because it makes the change only in the window.  */
  {
    register EMACS_INT new_point = marker_position (w->pointm);
    if (new_point < BEGV)
      SET_PT (BEGV);
    else if (new_point > ZV)
      SET_PT (ZV);
    else
      SET_PT (new_point);
  }

  windows_or_buffers_changed++;
  return window;
}

DEFUN ("select-window", Fselect_window, Sselect_window, 1, 2, 0,
       doc: /* Select WINDOW.  Most editing will apply to WINDOW's buffer.
Also make WINDOW's buffer current and make WINDOW the frame's selected
window.  Return WINDOW.

Optional second arg NORECORD non-nil means do not put this buffer at the
front of the buffer list and do not make this window the most recently
selected one.
403

404 405 406 407 408 409 410
Note that the main editor command loop sets the current buffer to the
buffer of the selected window before each command.  */)
  (register Lisp_Object window, Lisp_Object norecord)
{
  return select_window (window, norecord, 0);
}

411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428
DEFUN ("window-buffer", Fwindow_buffer, Swindow_buffer, 0, 1, 0,
       doc: /* Return the buffer that WINDOW is displaying.
WINDOW can be any window and defaults to the selected one.
If WINDOW is an internal window return nil.  */)
  (Lisp_Object window)
{
  return decode_any_window (window)->buffer;
}

DEFUN ("window-parent", Fwindow_parent, Swindow_parent, 0, 1, 0,
       doc: /* Return WINDOW's parent window.
WINDOW can be any window and defaults to the selected one.
Return nil if WINDOW has no parent.  */)
  (Lisp_Object window)
{
  return decode_any_window (window)->parent;
}

429 430
DEFUN ("window-top-child", Fwindow_top_child, Swindow_top_child, 0, 1, 0,
       doc: /* Return WINDOW's topmost child window.
431
WINDOW can be any window and defaults to the selected one.
432
Return nil if WINDOW is not a vertical combination.  */)
433 434 435 436 437
  (Lisp_Object window)
{
  return decode_any_window (window)->vchild;
}

438 439
DEFUN ("window-left-child", Fwindow_left_child, Swindow_left_child, 0, 1, 0,
       doc: /* Return WINDOW's leftmost child window.
440
WINDOW can be any window and defaults to the selected one.
441
Return nil if WINDOW is not a horizontal combination.  */)
442 443 444 445 446
  (Lisp_Object window)
{
  return decode_any_window (window)->hchild;
}

447 448
DEFUN ("window-next-sibling", Fwindow_next_sibling, Swindow_next_sibling, 0, 1, 0,
       doc: /* Return WINDOW's next sibling window.
449
WINDOW can be any window and defaults to the selected one.
450
Return nil if WINDOW has no next sibling.  */)
451 452 453 454 455
  (Lisp_Object window)
{
  return decode_any_window (window)->next;
}

456 457
DEFUN ("window-prev-sibling", Fwindow_prev_sibling, Swindow_prev_sibling, 0, 1, 0,
       doc: /* Return WINDOW's previous sibling window.
458
WINDOW can be any window and defaults to the selected one.
459
Return nil if WINDOW has no previous sibling.  */)
460 461 462 463
  (Lisp_Object window)
{
  return decode_any_window (window)->prev;
}
Gerd Moellmann's avatar
Gerd Moellmann committed
464

465 466 467
DEFUN ("window-splits", Fwindow_splits, Swindow_splits, 0, 1, 0,
       doc: /* Return splits status for WINDOW.
WINDOW can be any window and defaults to the selected one.
Jim Blandy's avatar
Jim Blandy committed
468

469 470 471 472
If the value returned by this function is nil and WINDOW is resized, the
corresponding space is preferably taken from (or given to) WINDOW's
right sibling.  When WINDOW is deleted, its space is given to its left
sibling.
473

474 475 476
If the value returned by this function is non-nil, resizing and deleting
WINDOW may resize all windows in the same combination.  */)
  (Lisp_Object window)
Jim Blandy's avatar
Jim Blandy committed
477
{
478
  return decode_any_window (window)->splits;
Jim Blandy's avatar
Jim Blandy committed
479
}
480

481 482 483 484
DEFUN ("set-window-splits", Fset_window_splits, Sset_window_splits, 2, 2, 0,
       doc: /* Set splits status of WINDOW to STATUS.
WINDOW can be any window and defaults to the selected one.  Return
STATUS.
485

486 487 488
If STATUS is nil and WINDOW is later resized, the corresponding space is
preferably taken from (or given to) WINDOW's right sibling.  When WINDOW
is deleted, its space is given to its left sibling.
489

490 491 492
If STATUS is non-nil, resizing and deleting WINDOW may resize all
windows in the same combination.  */)
  (Lisp_Object window, Lisp_Object status)
493
{
494
  register struct window *w = decode_any_window (window);
495

496
  w->splits = status;
497

498 499
  return w->splits;
}
500

501 502 503
DEFUN ("window-nest", Fwindow_nest, Swindow_nest, 0, 1, 0,
       doc: /* Return nest status of WINDOW.
WINDOW can be any window and defaults to the selected one.
504

505 506 507 508 509 510 511
If the return value is nil, subwindows of WINDOW can be recombined with
WINDOW's siblings.  A return value of non-nil means that subwindows of
WINDOW are never \(re-)combined with WINDOW's siblings.  */)
  (Lisp_Object window)
{
  return decode_any_window (window)->nest;
}
512

513 514 515 516
DEFUN ("set-window-nest", Fset_window_nest, Sset_window_nest, 2, 2, 0,
       doc: /* Set nest status of WINDOW to STATUS.
WINDOW can be any window and defaults to the selected one.  Return
STATUS.
517

518 519 520 521 522 523
If STATUS is nil, subwindows of WINDOW can be recombined with WINDOW's
siblings.  STATUS non-nil means that subwindows of WINDOW are never
\(re-)combined with WINDOW's siblings.  */)
  (Lisp_Object window, Lisp_Object status)
{
  register struct window *w = decode_any_window (window);
524

525
  w->nest = status;
526

527 528
  return w->nest;
}
529

530 531 532 533 534 535 536 537
DEFUN ("window-use-time", Fwindow_use_time, Swindow_use_time, 0, 1, 0,
       doc: /* Return WINDOW's use time.
WINDOW defaults to the selected window.  The window with the highest use
time is the most recently selected one.  The window with the lowest use
time is the least recently selected one.  */)
  (Lisp_Object window)
{
  return decode_window (window)->use_time;
538
}
539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560

DEFUN ("window-total-size", Fwindow_total_size, Swindow_total_size, 0, 2, 0,
       doc: /* Return the total number of lines of WINDOW.
WINDOW can be any window and defaults to the selected one.  The return
value includes WINDOW's mode line and header line, if any.  If WINDOW
is internal, the return value is the sum of the total number of lines
of WINDOW's child windows if these are vertically combined and the
height of WINDOW's first child otherwise.

Optional argument HORIZONTAL non-nil means return the total number of
columns of WINDOW.  In this case the return value includes any vertical
dividers or scrollbars of WINDOW.  If WINDOW is internal, the return
value is the sum of the total number of columns of WINDOW's child
windows if they are horizontally combined and the width of WINDOW's
first child otherwise.  */)
  (Lisp_Object window, Lisp_Object horizontal)
{
  if (NILP (horizontal))
    return decode_any_window (window)->total_lines;
  else
    return decode_any_window (window)->total_cols;
}
561

562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589
DEFUN ("window-new-total", Fwindow_new_total, Swindow_new_total, 0, 1, 0,
       doc: /* Return new total size of WINDOW.
WINDOW defaults to the selected window.   */)
  (Lisp_Object window)
{
  return decode_any_window (window)->new_total;
}

DEFUN ("window-normal-size", Fwindow_normal_size, Swindow_normal_size, 0, 2, 0,
       doc: /* Return normal height of WINDOW.
WINDOW can be any window and defaults to the selected one.  Optional
argument HORIZONTAL non-nil means return normal width of WINDOW.  */)
  (Lisp_Object window, Lisp_Object horizontal)
{
  if (NILP (horizontal))
    return decode_any_window (window)->normal_lines;
  else
    return decode_any_window (window)->normal_cols;
}

DEFUN ("window-new-normal", Fwindow_new_normal, Swindow_new_normal, 0, 1, 0,
       doc: /* Return new normal size of WINDOW.
WINDOW can be any window and defaults to the selected one.   */)
  (Lisp_Object window)
{
  return decode_any_window (window)->new_normal;
}

590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608
DEFUN ("window-left-column", Fwindow_left_column, Swindow_left_column, 0, 1, 0,
       doc: /* Return left column of WINDOW.
WINDOW can be any window and defaults to the selected one.  */)
  (Lisp_Object window)
{
  return decode_any_window (window)->left_col;
}

DEFUN ("window-top-line", Fwindow_top_line, Swindow_top_line, 0, 1, 0,
       doc: /* Return top line of WINDOW.
WINDOW can be any window and defaults to the selected one.  */)
  (Lisp_Object window)
{
  return decode_any_window (window)->top_line;
}

/* Return the number of lines of W's body.  Don't count any mode or
   header line of W.  */

609
static int
610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
window_body_lines (struct window *w)
{
  int height = XFASTINT (w->total_lines);

  if (!MINI_WINDOW_P (w))
    {
      if (WINDOW_WANTS_MODELINE_P (w))
	--height;
      if (WINDOW_WANTS_HEADER_LINE_P (w))
	--height;
    }

  return height;
}

/* Return the number of columns of W's body.  Don't count columns
   occupied by the scroll bar or the vertical bar separating W from its
   right sibling.  On window-systems don't count fringes or display
   margins either.  */

int
window_body_cols (struct window *w)
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  int width = XINT (w->total_cols);

  if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w))
    /* Scroll bars occupy a few columns.  */
    width -= WINDOW_CONFIG_SCROLL_BAR_COLS (w);
  else if (!FRAME_WINDOW_P (f)
	   && !WINDOW_RIGHTMOST_P (w) && !WINDOW_FULL_WIDTH_P (w))
    /* The column of `|' characters separating side-by-side windows
       occupies one column only.  */
    width -= 1;

  if (FRAME_WINDOW_P (f))
    /* On window-systems, fringes and display margins cannot be
       used for normal text.  */
    width -= (WINDOW_FRINGE_COLS (w)
	      + WINDOW_LEFT_MARGIN_COLS (w)
	      + WINDOW_RIGHT_MARGIN_COLS (w));

  return width;
}

DEFUN ("window-body-size", Fwindow_body_size, Swindow_body_size, 0, 2, 0,
       doc: /* Return the number of lines of WINDOW's body.
WINDOW must be a live window and defaults to the selected one.  The
return value does not include WINDOW's mode line and header line, if
any.

Optional argument HORIZONTAL non-nil means return the number of columns
of WINDOW's body.  In this case, the return value does not include any
vertical dividers or scroll bars owned by WINDOW.  On a window-system
the return value does not include the number of columns used for
WINDOW's fringes or display margins either.  */)
  (Lisp_Object window, Lisp_Object horizontal)
{
  struct window *w = decode_any_window (window);

  if (NILP (horizontal))
    return make_number (window_body_lines (w));
  else
    return make_number (window_body_cols (w));
}
675

Jim Blandy's avatar
Jim Blandy committed
676
DEFUN ("window-hscroll", Fwindow_hscroll, Swindow_hscroll, 0, 1, 0,
677
       doc: /* Return the number of columns by which WINDOW is scrolled from left margin.
678
WINDOW must be a live window and defaults to the selected one.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
679
  (Lisp_Object window)
Jim Blandy's avatar
Jim Blandy committed
680 681 682 683 684
{
  return decode_window (window)->hscroll;
}

DEFUN ("set-window-hscroll", Fset_window_hscroll, Sset_window_hscroll, 2, 2, 0,
685
       doc: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
686
Return NCOL.  NCOL should be zero or positive.
687 688

Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
689
window so that the location of point moves off-window.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
690
  (Lisp_Object window, Lisp_Object ncol)
Jim Blandy's avatar
Jim Blandy committed
691
{
692 693
  struct window *w = decode_window (window);
  int hscroll;
Jim Blandy's avatar
Jim Blandy committed
694

695
  CHECK_NUMBER (ncol);
696
  hscroll = max (0, XINT (ncol));
697

698 699
  /* Prevent redisplay shortcuts when changing the hscroll.  */
  if (XINT (w->hscroll) != hscroll)
Gerd Moellmann's avatar
Gerd Moellmann committed
700
    XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1;
701

702
  w->hscroll = make_number (hscroll);
Jim Blandy's avatar
Jim Blandy committed
703 704 705
  return ncol;
}

706 707
DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger,
       Swindow_redisplay_end_trigger, 0, 1, 0,
708
       doc: /* Return WINDOW's redisplay end trigger value.
709
WINDOW defaults to the selected window.
710
See `set-window-redisplay-end-trigger' for more information.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
711
  (Lisp_Object window)
712 713 714 715 716 717
{
  return decode_window (window)->redisplay_end_trigger;
}

DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger,
       Sset_window_redisplay_end_trigger, 2, 2, 0,
718 719 720 721 722 723
       doc: /* Set WINDOW's redisplay end trigger value to VALUE.
VALUE should be a buffer position (typically a marker) or nil.
If it is a buffer position, then if redisplay in WINDOW reaches a position
beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
with two arguments: WINDOW, and the end trigger value.
Afterwards the end-trigger value is reset to nil.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
724
  (register Lisp_Object window, Lisp_Object value)
725 726 727 728 729 730 731 732
{
  register struct window *w;

  w = decode_window (window);
  w->redisplay_end_trigger = value;
  return value;
}

Jim Blandy's avatar
Jim Blandy committed
733
DEFUN ("window-edges", Fwindow_edges, Swindow_edges, 0, 1, 0,
734
       doc: /* Return a list of the edge coordinates of WINDOW.
735 736 737 738 739 740 741 742 743
The list has the form (LEFT TOP RIGHT BOTTOM).
TOP and BOTTOM count by lines, and LEFT and RIGHT count by columns,
all relative to 0, 0 at top left corner of frame.

RIGHT is one more than the rightmost column occupied by WINDOW.
BOTTOM is one more than the bottommost row occupied by WINDOW.
The edges include the space used by WINDOW's scroll bar, display
margins, fringes, header line, and/or mode line.  For the edges of
just the text area, use `window-inside-edges'.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
744
  (Lisp_Object window)
Jim Blandy's avatar
Jim Blandy committed
745
{
Kenichi Handa's avatar
Kenichi Handa committed
746
  register struct window *w = decode_any_window (window);
Jim Blandy's avatar
Jim Blandy committed
747

748 749 750 751 752
  return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w)),
	 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w)),
	 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w)),
	 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w)),
		Qnil))));
Jim Blandy's avatar
Jim Blandy committed
753 754
}

755 756
DEFUN ("window-pixel-edges", Fwindow_pixel_edges, Swindow_pixel_edges, 0, 1, 0,
       doc: /* Return a list of the edge pixel coordinates of WINDOW.
757 758 759 760 761 762 763 764
The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
the top left corner of the frame.

RIGHT is one more than the rightmost x position occupied by WINDOW.
BOTTOM is one more than the bottommost y position occupied by WINDOW.
The pixel edges include the space used by WINDOW's scroll bar, display
margins, fringes, header line, and/or mode line.  For the pixel edges
of just the text area, use `window-inside-pixel-edges'.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
765
  (Lisp_Object window)
766
{
Kenichi Handa's avatar
Kenichi Handa committed
767
  register struct window *w = decode_any_window (window);
768 769 770 771 772 773 774 775

  return Fcons (make_number (WINDOW_LEFT_EDGE_X (w)),
	 Fcons (make_number (WINDOW_TOP_EDGE_Y (w)),
	 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w)),
	 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w)),
		Qnil))));
}

776 777 778 779 780 781 782 783
static void
calc_absolute_offset(struct window *w, int *add_x, int *add_y)
{
  struct frame *f = XFRAME (w->frame);
  *add_y = f->top_pos;
#ifdef FRAME_MENUBAR_HEIGHT
  *add_y += FRAME_MENUBAR_HEIGHT (f);
#endif
784 785 786
#ifdef FRAME_TOOLBAR_TOP_HEIGHT
  *add_y += FRAME_TOOLBAR_TOP_HEIGHT (f);
#elif FRAME_TOOLBAR_HEIGHT
787 788 789 790 791 792
  *add_y += FRAME_TOOLBAR_HEIGHT (f);
#endif
#ifdef FRAME_NS_TITLEBAR_HEIGHT
  *add_y += FRAME_NS_TITLEBAR_HEIGHT (f);
#endif
  *add_x = f->left_pos;
793 794 795
#ifdef FRAME_TOOLBAR_LEFT_WIDTH
  *add_x += FRAME_TOOLBAR_LEFT_WIDTH (f);
#endif
796 797 798 799 800 801 802 803 804 805 806 807
}

DEFUN ("window-absolute-pixel-edges", Fwindow_absolute_pixel_edges,
       Swindow_absolute_pixel_edges, 0, 1, 0,
       doc: /* Return a list of the edge pixel coordinates of WINDOW.
The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
the top left corner of the display.

RIGHT is one more than the rightmost x position occupied by WINDOW.
BOTTOM is one more than the bottommost y position occupied by WINDOW.
The pixel edges include the space used by WINDOW's scroll bar, display
margins, fringes, header line, and/or mode line.  For the pixel edges
808
of just the text area, use `window-inside-absolute-pixel-edges'.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
809
  (Lisp_Object window)
810 811 812
{
  register struct window *w = decode_any_window (window);
  int add_x, add_y;
813
  calc_absolute_offset (w, &add_x, &add_y);
814 815 816 817 818 819 820 821

  return Fcons (make_number (WINDOW_LEFT_EDGE_X (w) + add_x),
         Fcons (make_number (WINDOW_TOP_EDGE_Y (w) + add_y),
	 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w) + add_x),
	 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w) + add_y),
		Qnil))));
}

822 823
DEFUN ("window-inside-edges", Fwindow_inside_edges, Swindow_inside_edges, 0, 1, 0,
       doc: /* Return a list of the edge coordinates of WINDOW.
824 825 826 827 828 829 830 831
The list has the form (LEFT TOP RIGHT BOTTOM).
TOP and BOTTOM count by lines, and LEFT and RIGHT count by columns,
all relative to 0, 0 at top left corner of frame.

RIGHT is one more than the rightmost column of WINDOW's text area.
BOTTOM is one more than the bottommost row of WINDOW's text area.
The inside edges do not include the space used by the WINDOW's scroll
bar, display margins, fringes, header line, and/or mode line.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
832
  (Lisp_Object window)
833
{
Kenichi Handa's avatar
Kenichi Handa committed
834
  register struct window *w = decode_any_window (window);
835 836 837 838 839 840

  return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w)
			     + WINDOW_LEFT_MARGIN_COLS (w)
			     + WINDOW_LEFT_FRINGE_COLS (w)),
		make_number (WINDOW_TOP_EDGE_LINE (w)
			     + WINDOW_HEADER_LINE_LINES (w)),
841
		make_number (WINDOW_BOX_RIGHT_EDGE_COL (w)
842 843 844 845 846 847 848
			     - WINDOW_RIGHT_MARGIN_COLS (w)
			     - WINDOW_RIGHT_FRINGE_COLS (w)),
		make_number (WINDOW_BOTTOM_EDGE_LINE (w)
			     - WINDOW_MODE_LINE_LINES (w)));
}

DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges, Swindow_inside_pixel_edges, 0, 1, 0,
849
       doc: /* Return a list of the edge pixel coordinates of WINDOW.
850 851 852 853 854 855
The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
the top left corner of the frame.

RIGHT is one more than the rightmost x position of WINDOW's text area.
BOTTOM is one more than the bottommost y position of WINDOW's text area.
The inside edges do not include the space used by WINDOW's scroll bar,
856
display margins, fringes, header line, and/or mode line.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
857
  (Lisp_Object window)
858
{
Kenichi Handa's avatar
Kenichi Handa committed
859
  register struct window *w = decode_any_window (window);
860 861 862 863 864 865

  return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w)
			     + WINDOW_LEFT_MARGIN_WIDTH (w)
			     + WINDOW_LEFT_FRINGE_WIDTH (w)),
		make_number (WINDOW_TOP_EDGE_Y (w)
			     + WINDOW_HEADER_LINE_HEIGHT (w)),
866
		make_number (WINDOW_BOX_RIGHT_EDGE_X (w)
867 868 869 870 871 872
			     - WINDOW_RIGHT_MARGIN_WIDTH (w)
			     - WINDOW_RIGHT_FRINGE_WIDTH (w)),
		make_number (WINDOW_BOTTOM_EDGE_Y (w)
			     - WINDOW_MODE_LINE_HEIGHT (w)));
}

873 874 875 876 877 878 879 880 881 882 883
DEFUN ("window-inside-absolute-pixel-edges",
       Fwindow_inside_absolute_pixel_edges,
       Swindow_inside_absolute_pixel_edges, 0, 1, 0,
       doc: /* Return a list of the edge pixel coordinates of WINDOW.
The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
the top left corner of the display.

RIGHT is one more than the rightmost x position of WINDOW's text area.
BOTTOM is one more than the bottommost y position of WINDOW's text area.
The inside edges do not include the space used by WINDOW's scroll bar,
display margins, fringes, header line, and/or mode line.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
884
  (Lisp_Object window)
885 886 887
{
  register struct window *w = decode_any_window (window);
  int add_x, add_y;
888
  calc_absolute_offset (w, &add_x, &add_y);
889 890 891 892 893 894 895 896 897 898 899 900 901

  return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w)
			     + WINDOW_LEFT_MARGIN_WIDTH (w)
			     + WINDOW_LEFT_FRINGE_WIDTH (w) + add_x),
		make_number (WINDOW_TOP_EDGE_Y (w)
			     + WINDOW_HEADER_LINE_HEIGHT (w) + add_y),
		make_number (WINDOW_BOX_RIGHT_EDGE_X (w)
			     - WINDOW_RIGHT_MARGIN_WIDTH (w)
			     - WINDOW_RIGHT_FRINGE_WIDTH (w) + add_x),
		make_number (WINDOW_BOTTOM_EDGE_Y (w)
			     - WINDOW_MODE_LINE_HEIGHT (w) + add_y));
}

902
/* Test if the character at column X, row Y is within window W.
903
   If it is not, return ON_NOTHING;
904
   if it is in the window's text area, return ON_TEXT;
905
   if it is on the window's modeline, return ON_MODE_LINE;
Jim Blandy's avatar
Jim Blandy committed
906
   if it is on the border between the window and its right sibling,
907
      return ON_VERTICAL_BORDER.
908
   if it is on a scroll bar, return ON_SCROLL_BAR.
909
   if it is on the window's top line, return ON_HEADER_LINE;
Kim F. Storm's avatar
Kim F. Storm committed
910
   if it is in left or right fringe of the window,
911
      return ON_LEFT_FRINGE or ON_RIGHT_FRINGE;
912
   if it is in the marginal area to the left/right of the window,
913
      return ON_LEFT_MARGIN or ON_RIGHT_MARGIN.
914 915 916

   X and Y are frame relative pixel coordinates.  */

917
static enum window_part
918
coordinates_in_window (register struct window *w, int x, int y)
Jim Blandy's avatar
Jim Blandy committed
919
{
920
  struct frame *f = XFRAME (WINDOW_FRAME (w));
921
  int left_x, right_x;
922
  enum window_part part;
923 924 925
  int ux = FRAME_COLUMN_WIDTH (f);
  int x0 = WINDOW_LEFT_EDGE_X (w);
  int x1 = WINDOW_RIGHT_EDGE_X (w);
926 927 928
  /* The width of the area where the vertical line can be dragged.
     (Between mode lines for instance.  */
  int grabbable_width = ux;
929
  int lmargin_width, rmargin_width, text_left, text_right;
930 931 932 933 934 935
  int top_y = WINDOW_TOP_EDGE_Y (w);
  int bottom_y = WINDOW_BOTTOM_EDGE_Y (w);

  /* Outside any interesting row?  */
  if (y < top_y || y >= bottom_y)
    return ON_NOTHING;
936

937 938
  /* In what's below, we subtract 1 when computing right_x because we
     want the rightmost pixel, which is given by left_pixel+width-1.  */
939 940 941
  if (w->pseudo_window_p)
    {
      left_x = 0;
942
      right_x = WINDOW_TOTAL_WIDTH (w) - 1;
943 944 945
    }
  else
    {
946 947
      left_x = WINDOW_BOX_LEFT_EDGE_X (w);
      right_x = WINDOW_BOX_RIGHT_EDGE_X (w) - 1;
948
    }
949

950 951 952 953 954
  /* On the mode line or header line?  If it's near the start of
     the mode or header line of window that's has a horizontal
     sibling, say it's on the vertical line.  That's to be able
     to resize windows horizontally in case we're using toolkit
     scroll bars.  */
955

956
  if (WINDOW_WANTS_MODELINE_P (w)
957
      && y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w))
958
    {
959 960 961
      part = ON_MODE_LINE;

    header_vertical_border_check:
962 963
      /* We're somewhere on the mode line.  We consider the place
	 between mode lines of horizontally adjacent mode lines
964
	 as the vertical border.  If scroll bars on the left,
965
	 return the right window.  */
966 967 968 969 970 971 972 973 974 975 976 977 978 979
      if ((WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w)
	   || WINDOW_RIGHTMOST_P (w))
	  && !WINDOW_LEFTMOST_P (w)
	  && eabs (x - x0) < grabbable_width)
	return ON_VERTICAL_BORDER;

      /* Make sure we're not at the rightmost position of a
	 mode-/header-line and there's yet another window on the
	 right.  (Bug#1372)  */
      else if ((WINDOW_RIGHTMOST_P (w) || x < x1)
	       && eabs (x - x1) < grabbable_width)
	return ON_VERTICAL_BORDER;

      if (x < x0 || x >= x1)
980 981
	return ON_NOTHING;

982
      return part;
983
    }
984 985

  if (WINDOW_WANTS_HEADER_LINE_P (w)
986
      && y < top_y + CURRENT_HEADER_LINE_HEIGHT (w))
987
    {
988 989
      part = ON_HEADER_LINE;
      goto header_vertical_border_check;
990
    }
991

992
  if (x < x0 || x >= x1) return ON_NOTHING;
993

994
  /* Outside any interesting column?  */
995 996
  if (x < left_x || x > right_x)
    return ON_SCROLL_BAR;
997 998 999

  lmargin_width = window_box_width (w, LEFT_MARGIN_AREA);
  rmargin_width = window_box_width (w, RIGHT_MARGIN_AREA);
1000

1001 1002 1003 1004
  text_left = window_box_left (w, TEXT_AREA);
  text_right = text_left + window_box_width (w, TEXT_AREA);

  if (FRAME_WINDOW_P (f))
1005
    {
1006
      if (!w->pseudo_window_p
1007
	  && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w)
1008
	  && !WINDOW_RIGHTMOST_P (w)
1009 1010
	  && (eabs (x - right_x) < grabbable_width))
	return ON_VERTICAL_BORDER;
1011
    }
1012 1013 1014 1015 1016 1017 1018 1019
  /* Need to say "x > right_x" rather than >=, since on character
     terminals, the vertical line's x coordinate is right_x.  */
  else if (!w->pseudo_window_p
	   && !WINDOW_RIGHTMOST_P (w)
	   && x > right_x - ux)
    return ON_VERTICAL_BORDER;

  if (x < text_left)
1020 1021 1022
    {
      if (lmargin_width > 0
	  && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)
1023 1024 1025 1026
	      ? (x >= left_x + WINDOW_LEFT_FRINGE_WIDTH (w))
	      : (x < left_x + lmargin_width)))
	return ON_LEFT_MARGIN;

1027 1028 1029
      return ON_LEFT_FRINGE;
    }

1030
  if (x >= text_right)
1031 1032 1033
    {
      if (rmargin_width > 0
	  && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)
1034 1035 1036 1037
	      ? (x < right_x - WINDOW_RIGHT_FRINGE_WIDTH (w))
	      : (x >= right_x - rmargin_width)))
	return ON_RIGHT_MARGIN;

1038 1039 1040 1041 1042
      return ON_RIGHT_FRINGE;
    }

  /* Everything special ruled out - must be on text area */
  return ON_TEXT;
Jim Blandy's avatar
Jim Blandy committed
1043 1044
}

1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
/* Take X is the frame-relative pixel x-coordinate, and return the
   x-coordinate relative to part PART of window W. */
int
window_relative_x_coord (struct window *w, enum window_part part, int x)
{
  int left_x = (w->pseudo_window_p) ? 0 : WINDOW_BOX_LEFT_EDGE_X (w);

  switch (part)
    {
    case ON_TEXT:
      return x - window_box_left (w, TEXT_AREA);

    case ON_LEFT_FRINGE:
      return x - left_x;

    case ON_RIGHT_FRINGE:
      return x - left_x - WINDOW_LEFT_FRINGE_WIDTH (w);

    case ON_LEFT_MARGIN:
      return (x - left_x
	      - ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w))
		 ? WINDOW_LEFT_FRINGE_WIDTH (w) : 0));

    case ON_RIGHT_MARGIN:
      return (x + 1
	      - ((w->pseudo_window_p)
		 ? WINDOW_TOTAL_WIDTH (w)
		 : WINDOW_BOX_RIGHT_EDGE_X (w))
	      + window_box_width (w, RIGHT_MARGIN_AREA)
	      + ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w))
		 ? WINDOW_RIGHT_FRINGE_WIDTH (w) : 0));
    }

  /* ON_SCROLL_BAR, ON_NOTHING, and ON_VERTICAL_BORDER:  */
  return 0;
}

1082

Jim Blandy's avatar
Jim Blandy committed
1083
DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p,
1084 1085 1086 1087
       Scoordinates_in_window_p, 2, 2, 0,
       doc: /* Return non-nil if COORDINATES are in WINDOW.
COORDINATES is a cons of the form (X . Y), X and Y being distances
measured in characters from the upper-left corner of the frame.
1088
\(0 . 0) denotes the character in the upper left corner of the
1089 1090 1091 1092 1093
frame.
If COORDINATES are in the text portion of WINDOW,
   the coordinates relative to the window are returned.
If they are in the mode line of WINDOW, `mode-line' is returned.
If they are in the top mode line of WINDOW, `header-line' is returned.
Kim F. Storm's avatar
Kim F. Storm committed
1094 1095
If they are in the left fringe of WINDOW, `left-fringe' is returned.
If they are in the right fringe of WINDOW, `right-fringe' is returned.
1096
If they are on the border between WINDOW and its right sibling,
1097 1098 1099
  `vertical-line' is returned.
If they are in the windows's left or right marginal areas, `left-margin'\n\
  or `right-margin' is returned.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
1100
  (register Lisp_Object coordinates, Lisp_Object window)
Jim Blandy's avatar
Jim Blandy committed
1101
{
1102 1103
  struct window *w;
  struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
1104
  int x, y;
1105
  Lisp_Object lx, ly;
Jim Blandy's avatar
Jim Blandy committed
1106

Kenichi Handa's avatar
Kenichi Handa committed
1107
  CHECK_WINDOW (window);
1108 1109
  w = XWINDOW (window);
  f = XFRAME (w->frame);
1110
  CHECK_CONS (coordinates);
1111 1112
  lx = Fcar (coordinates);
  ly = Fcdr (coordinates);
1113 1114
  CHECK_NUMBER_OR_FLOAT (lx);
  CHECK_NUMBER_OR_FLOAT (ly);
1115 1116
  x = FRAME_PIXEL_X_FROM_CANON_X (f, lx) + FRAME_INTERNAL_BORDER_WIDTH (f);
  y = FRAME_PIXEL_Y_FROM_CANON_Y (f, ly) + FRAME_INTERNAL_BORDER_WIDTH (f);
1117

1118
  switch (coordinates_in_window (w, x, y))
Jim Blandy's avatar
Jim Blandy committed
1119
    {
1120
    case ON_NOTHING:
Jim Blandy's avatar
Jim Blandy committed
1121 1122
      return Qnil;

1123
    case ON_TEXT:
1124 1125 1126 1127
      /* Convert X and Y to window relative pixel coordinates, and
	 return the canonical char units.  */
      x -= window_box_left (w, TEXT_AREA);
      y -= WINDOW_TOP_EDGE_Y (w);
1128 1129
      return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f, x),
		    FRAME_CANON_Y_FROM_PIXEL_Y (f, y));
Jim Blandy's avatar
Jim Blandy committed
1130

1131
    case ON_MODE_LINE:
Jim Blandy's avatar
Jim Blandy committed
1132
      return Qmode_line;
1133

1134
    case ON_VERTICAL_BORDER:
Jim Blandy's avatar
Jim Blandy committed
1135
      return Qvertical_line;
Jim Blandy's avatar
Jim Blandy committed
1136

1137
    case ON_HEADER_LINE:
Gerd Moellmann's avatar
Change  
Gerd Moellmann committed
1138
      return Qheader_line;
1139

1140 1141
    case ON_LEFT_FRINGE:
      return Qleft_fringe;
1142

1143 1144
    case ON_RIGHT_FRINGE:
      return Qright_fringe;
1145

1146 1147
    case ON_LEFT_MARGIN:
      return Qleft_margin;
1148

1149 1150 1151
    case ON_RIGHT_MARGIN:
      return Qright_margin;

1152 1153 1154 1155
    case ON_SCROLL_BAR:
      /* Historically we are supposed to return nil in this case.  */
      return Qnil;

Jim Blandy's avatar
Jim Blandy committed
1156 1157 1158 1159 1160
    default:
      abort ();
    }
}

Gerd Moellmann's avatar
Gerd Moellmann committed
1161 1162

/* Callback for foreach_window, used in window_from_coordinates.
1163 1164 1165 1166 1167
   Check if window W contains coordinates specified by USER_DATA which
   is actually a pointer to a struct check_window_data CW.

   Check if window W contains coordinates *CW->x and *CW->y.  If it
   does, return W in *CW->window, as Lisp_Object, and return in
Dave Love's avatar
Dave Love committed
1168
   *CW->part the part of the window under coordinates *X,*Y.  Return
1169 1170 1171 1172 1173
   zero from this function to stop iterating over windows.  */

struct check_window_data
{
  Lisp_Object *window;
1174
  int x, y;
1175
  enum window_part *part;
1176
};
Gerd Moellmann's avatar
Gerd Moellmann committed
1177 1178

static int
1179
check_window_containing (struct window *w, void *user_data)
Gerd Moellmann's avatar
Gerd Moellmann committed
1180
{
1181
  struct check_window_data *cw = (struct check_window_data *) user_data;
1182 1183
  enum window_part found;
  int continue_p = 1;
Gerd Moellmann's avatar
Gerd Moellmann committed
1184

1185
  found = coordinates_in_window (w, cw->x, cw->y);
1186
  if (found != ON_NOTHING)
Gerd Moellmann's avatar
Gerd Moellmann committed
1187
    {
1188
      *cw->part = found;
1189
      XSETWINDOW (*cw->window, w);
1190
      continue_p = 0;
Gerd Moellmann's avatar
Gerd Moellmann committed
1191
    }
1192

1193
  return continue_p;
Gerd Moellmann's avatar
Gerd Moellmann committed
1194 1195 1196
}


1197
/* Find the window containing frame-relative pixel position X/Y and
1198 1199 1200
   return it as a Lisp_Object.

   If X, Y is on one of the window's special `window_part' elements,
1201
   set *PART to the id of that element.
1202

1203
   If there is no window under X, Y return nil and leave *PART
Gerd Moellmann's avatar
Gerd Moellmann committed
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
   unmodified.  TOOL_BAR_P non-zero means detect tool-bar windows.

   This function was previously implemented with a loop cycling over
   windows with Fnext_window, and starting with the frame's selected
   window.  It turned out that this doesn't work with an
   implementation of next_window using Vwindow_list, because
   FRAME_SELECTED_WINDOW (F) is not always contained in the window
   tree of F when this function is called asynchronously from
   note_mouse_highlight.  The original loop didn't terminate in this
   case.  */
1214

Jim Blandy's avatar
Jim Blandy committed
1215
Lisp_Object
1216 1217
window_from_coordinates (struct frame *f, int x, int y,
			 enum window_part *part, int tool_bar_p)
Jim Blandy's avatar
Jim Blandy committed
1218
{
Gerd Moellmann's avatar
Gerd Moellmann committed
1219
  Lisp_Object window;
1220
  struct check_window_data cw;
1221 1222 1223 1224
  enum window_part dummy;

  if (part == 0)
    part = &dummy;
1225

Gerd Moellmann's avatar
Gerd Moellmann committed
1226
  window = Qnil;
1227
  cw.window = &window, cw.x = x, cw.y = y; cw.part = part;
1228
  foreach_window (f, check_window_containing, &cw);
1229

Gerd Moellmann's avatar
Gerd Moellmann committed
1230 1231 1232 1233 1234
  /* If not found above, see if it's in the tool bar window, if a tool
     bar exists.  */
  if (NILP (window)
      && tool_bar_p
      && WINDOWP (f->tool_bar_window)
1235
      && WINDOW_TOTAL_LINES (XWINDOW (f->tool_bar_window)) > 0
1236
      && (coordinates_in_window (XWINDOW (f->tool_bar_window), x, y)
1237
	  != ON_NOTHING))
1238
    {
1239
      *part = ON_TEXT;
Gerd Moellmann's avatar
Gerd Moellmann committed
1240
      window = f->tool_bar_window;
1241
    }
1242

Gerd Moellmann's avatar
Gerd Moellmann committed
1243
  return window;
Jim Blandy's avatar
Jim Blandy committed
1244 1245
}

1246
DEFUN ("window-at", Fwindow_at, Swindow_at, 2, 3, 0,
1247
       doc: /* Return window containing coordinates X and Y on FRAME.
1248
FRAME must be a live frame and defaults to the selected one.
1249 1250
The top left corner of the frame is considered to be row 0,
column 0.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
1251
  (Lisp_Object x, Lisp_Object y, Lisp_Object frame)
Jim Blandy's avatar
Jim Blandy committed
1252
{
1253
  struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
1254

Jim Blandy's avatar
Jim Blandy committed
1255
  if (NILP (frame))
1256
    frame = selected_frame;
1257
  CHECK_LIVE_FRAME (frame);
1258
  f = XFRAME (frame);
Jim Blandy's avatar
Jim Blandy committed
1259

1260
  /* Check that arguments are integers or floats.  */
1261 1262
  CHECK_NUMBER_OR_FLOAT (x);
  CHECK_NUMBER_OR_FLOAT (y);
1263

1264
  return window_from_coordinates (f,
1265 1266 1267