xterm.c 126 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* X Communication module for terminals which understand the X protocol.
2
   Copyright (C) 1989, 1993 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
3 4 5 6 7

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Jim Blandy's avatar
Jim Blandy committed
8
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
any later version.

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
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Serious problems:

   Kludge: dup2 is used to put the X-connection socket into desc # 0
   so that wait_reading_process_input will wait for it in place of
   actual terminal input.
   
*/

28 29
#define NEW_SELECTIONS

30 31 32 33 34 35
/* On 4.3 these lose if they come after xterm.h.  */
/* On HP-UX 8.0 signal.h loses if it comes after config.h.  */
/* Putting these at the beginning seems to be standard for other .c files.  */
#include <stdio.h>
#include <signal.h>

Jim Blandy's avatar
Jim Blandy committed
36 37 38 39 40
#include "config.h"

#ifdef HAVE_X_WINDOWS

#include "lisp.h"
41
#include "blockinput.h"
Jim Blandy's avatar
Jim Blandy committed
42 43 44 45

/* This may include sys/types.h, and that somehow loses
   if this is not done before the other system files.  */
#include "xterm.h"
46
#include <X11/cursorfont.h>
Jim Blandy's avatar
Jim Blandy committed
47

48
#ifndef USG
Jim Blandy's avatar
Jim Blandy committed
49 50 51 52
/* Load sys/types.h if not already loaded.
   In some systems loading it twice is suicidal.  */
#ifndef makedev
#include <sys/types.h>
53 54
#endif /* makedev */
#endif /* USG */
Jim Blandy's avatar
Jim Blandy committed
55 56 57 58

#ifdef BSD
#include <sys/ioctl.h>
#include <strings.h>
59
#else /* ! defined (BSD) */
60
#ifndef VMS
Jim Blandy's avatar
Jim Blandy committed
61 62
#include <sys/termio.h>
#include <string.h>
63
#endif
64
#endif /* ! defined (BSD) */
Jim Blandy's avatar
Jim Blandy committed
65 66 67 68

/* Allow m- file to inhibit use of FIONREAD.  */
#ifdef BROKEN_FIONREAD
#undef FIONREAD
69
#endif /* ! defined (BROKEN_FIONREAD) */
Jim Blandy's avatar
Jim Blandy committed
70 71 72 73 74 75

/* We are unable to use interrupts if FIONREAD is not available,
   so flush SIGIO so we won't try.  */
#ifndef FIONREAD
#ifdef SIGIO
#undef SIGIO
76 77
#endif /* ! defined (SIGIO) */
#endif /* FIONREAD */
Jim Blandy's avatar
Jim Blandy committed
78

Jim Blandy's avatar
Jim Blandy committed
79
#include "systime.h"
Jim Blandy's avatar
Jim Blandy committed
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94

#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/stat.h>
#include <sys/param.h>

#include "dispextern.h"
#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"
#if 0
#include "sink.h"
#include "sinkmask.h"
95
#endif /* ! 0 */
Jim Blandy's avatar
Jim Blandy committed
96
#include "gnu.h"
Jim Blandy's avatar
Jim Blandy committed
97
#include "frame.h"
Jim Blandy's avatar
Jim Blandy committed
98 99
#include "disptab.h"
#include "buffer.h"
100
#include "window.h"
Jim Blandy's avatar
Jim Blandy committed
101 102 103

#ifdef HAVE_X11
#define XMapWindow XMapRaised		/* Raise them when mapping. */
104
#else /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
105 106
#include <X/Xkeyboard.h>
/*#include <X/Xproto.h>	*/
107
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
108 109 110 111 112 113 114 115 116

/* For sending Meta-characters.  Do we need this? */
#define METABIT 0200

#define min(a,b) ((a)<(b) ? (a) : (b))
#define max(a,b) ((a)>(b) ? (a) : (b))

/* Nonzero means we must reprint all windows
   because 1) we received an ExposeWindow event
117
   or 2) we received too many ExposeRegion events to record.
Jim Blandy's avatar
Jim Blandy committed
118

119
   This is never needed under X11.  */
Jim Blandy's avatar
Jim Blandy committed
120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135
static int expose_all_windows;

/* Nonzero means we must reprint all icon windows.  */

static int expose_all_icons;

#ifndef HAVE_X11
/* ExposeRegion events, when received, are copied into this queue
   for later processing.  */

static struct event_queue x_expose_queue;

/* ButtonPressed and ButtonReleased events, when received,
   are copied into this queue for later processing.  */

struct event_queue x_mouse_queue;
136
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
137 138 139

#if defined (SIGIO) && defined (FIONREAD)
int BLOCK_INPUT_mask;
140
#endif /* ! defined (SIGIO) && defined (FIONREAD) */
Jim Blandy's avatar
Jim Blandy committed
141 142 143 144 145 146 147 148 149 150 151 152 153 154

/* The id of a bitmap used for icon windows.
   One such map is shared by all Emacs icon windows.
   This is zero if we have not yet had a need to create the bitmap.  */

static Bitmap icon_bitmap;

/* Font used for text icons.  */

static FONT_TYPE *icon_font_info;

/* Stuff for dealing with the main icon title. */

extern Lisp_Object Vcommand_line_args;
Jim Blandy's avatar
Jim Blandy committed
155
char *hostname, *x_id_name;
Jim Blandy's avatar
Jim Blandy committed
156 157 158 159 160

/* This is the X connection that we are using.  */

Display *x_current_display;

161 162
/* The cursor to use for vertical scroll bars on x_current_display.  */
static Cursor x_vertical_scroll_bar_cursor;
163

164
/* Frame being updated by update_frame.  This is declared in term.c.
165
   This is set by update_begin and looked at by all the
Jim Blandy's avatar
Jim Blandy committed
166
   XT functions.  It is zero while not inside an update.
Jim Blandy's avatar
Jim Blandy committed
167 168
   In that case, the XT functions assume that `selected_frame'
   is the frame to apply to.  */
169
extern struct frame *updating_frame;
Jim Blandy's avatar
Jim Blandy committed
170

Jim Blandy's avatar
Jim Blandy committed
171
/* The frame (if any) which has the X window that has keyboard focus.
172 173 174 175
   Zero if none.  This is examined by Ffocus_frame in frame.c.  Note
   that a mere EnterNotify event can set this; if you need to know the
   last frame specified in a FocusIn or FocusOut event, use
   x_focus_event_frame.  */
Jim Blandy's avatar
Jim Blandy committed
176
struct frame *x_focus_frame;
Jim Blandy's avatar
Jim Blandy committed
177

178 179 180 181 182 183
/* The last frame mentioned in a FocusIn or FocusOut event.  This is
   separate from x_focus_frame, because whether or not LeaveNotify
   events cause us to lose focus depends on whether or not we have
   received a FocusIn event for it.  */
struct frame *x_focus_event_frame;

Jim Blandy's avatar
Jim Blandy committed
184 185 186 187
/* The frame which currently has the visual highlight, and should get
   keyboard input (other sorts of input have the frame encoded in the
   event).  It points to the X focus frame's selected window's
   frame.  It differs from x_focus_frame when we're using a global
Jim Blandy's avatar
Jim Blandy committed
188
   minibuffer.  */
Jim Blandy's avatar
Jim Blandy committed
189
static struct frame *x_highlight_frame;
Jim Blandy's avatar
Jim Blandy committed
190

Jim Blandy's avatar
Jim Blandy committed
191
/* From .Xdefaults, the value of "emacs.WarpMouse".  If non-zero,
Jim Blandy's avatar
Jim Blandy committed
192
   mouse is moved to inside of frame when frame is de-iconified.  */
Jim Blandy's avatar
Jim Blandy committed
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

static int warp_mouse_on_deiconify;

/* During an update, maximum vpos for ins/del line operations to affect.  */

static int flexlines;

/* During an update, nonzero if chars output now should be highlighted.  */

static int highlight;

/* Nominal cursor position -- where to draw output.
   During an update, these are different from the cursor-box position.  */

static int curs_x;
static int curs_y;

#ifdef HAVE_X11
/* `t' if a mouse button is depressed. */

extern Lisp_Object Vmouse_depressed;

/* Tells if a window manager is present or not. */

extern Lisp_Object Vx_no_window_manager;

/* Timestamp that we requested selection data was made. */
extern Time requestor_time;

/* ID of the window requesting selection data. */
extern Window requestor_window;

/* Nonzero enables some debugging for the X interface code. */
extern int _Xdebug;

228
#else /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247

/* Bit patterns for the mouse cursor.  */

short MouseCursor[] = {
  0x0000, 0x0008, 0x0018, 0x0038,
  0x0078, 0x00f8, 0x01f8, 0x03f8,
  0x07f8, 0x00f8, 0x00d8, 0x0188,
  0x0180, 0x0300, 0x0300, 0x0000};

short MouseMask[] = {
  0x000c, 0x001c, 0x003c, 0x007c,
  0x00fc, 0x01fc, 0x03fc, 0x07fc,
  0x0ffc, 0x0ffc, 0x01fc, 0x03dc,
  0x03cc, 0x0780, 0x0780, 0x0300};

static short grey_bits[] = {
  0x0005, 0x000a, 0x0005, 0x000a};

static Pixmap GreyPixmap = 0;
248
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
249 250 251 252 253 254 255

/* From time to time we get info on an Emacs window, here.  */

static WINDOWINFO_TYPE windowinfo;

extern int errno;

256
/* A mask of extra modifier bits to put into every keyboard char.  */
257 258
extern int extra_keyboard_modifiers;

Jim Blandy's avatar
Jim Blandy committed
259 260 261 262 263 264 265 266 267 268
extern Display *XOpenDisplay ();
extern Window XCreateWindow ();

extern Cursor XCreateCursor ();
extern FONT_TYPE *XOpenFont ();

static void flashback ();

#ifndef HAVE_X11
static void dumpqueue ();
269
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
270 271

void dumpborder ();
Jim Blandy's avatar
Jim Blandy committed
272 273
static int XTcursor_to ();
static int XTclear_end_of_line ();
274

Jim Blandy's avatar
Jim Blandy committed
275

276 277 278
/* Starting and ending updates. 

   These hooks are called by update_frame at the beginning and end
Jim Blandy's avatar
Jim Blandy committed
279 280 281
   of a frame update.  We record in `updating_frame' the identity
   of the frame being updated, so that the XT... functions do not
   need to take a frame as argument.  Most of the XT... functions
Jim Blandy's avatar
Jim Blandy committed
282 283 284 285 286 287
   should never be called except during an update, the only exceptions
   being XTcursor_to, XTwrite_char and XTreassert_line_highlight.  */

extern int mouse_track_top, mouse_track_left, mouse_track_width;

static
Jim Blandy's avatar
Jim Blandy committed
288 289
XTupdate_begin (f)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
290 291 292
{	
  int mask;

Jim Blandy's avatar
Jim Blandy committed
293
  if (f == 0)
Jim Blandy's avatar
Jim Blandy committed
294 295
    abort ();

Jim Blandy's avatar
Jim Blandy committed
296
  flexlines = f->height;
Jim Blandy's avatar
Jim Blandy committed
297 298 299 300 301
  highlight = 0;

  BLOCK_INPUT;
#ifndef HAVE_X11
  dumpqueue ();
302
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
303 304 305
  UNBLOCK_INPUT;
}

306
#ifndef HAVE_X11
Jim Blandy's avatar
Jim Blandy committed
307
static void x_do_pending_expose ();
308
#endif
Jim Blandy's avatar
Jim Blandy committed
309 310

static
Jim Blandy's avatar
Jim Blandy committed
311 312
XTupdate_end (f)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
313 314 315
{	
  int mask;

Jim Blandy's avatar
Jim Blandy committed
316 317
  if (updating_frame == 0
      || updating_frame != f)
Jim Blandy's avatar
Jim Blandy committed
318 319 320 321 322 323
    abort ();

  BLOCK_INPUT;
#ifndef HAVE_X11
  dumpqueue ();
  x_do_pending_expose ();
324
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
325

Jim Blandy's avatar
Jim Blandy committed
326
  x_display_cursor (f, 1);
Jim Blandy's avatar
Jim Blandy committed
327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350

  XFlushQueue ();
  UNBLOCK_INPUT;
}

/* External interface to control of standout mode.
   Call this when about to modify line at position VPOS
   and not change whether it is highlighted.  */

XTreassert_line_highlight (new, vpos)
     int new, vpos;
{
  highlight = new;
}

/* Call this when about to modify line at position VPOS
   and change whether it is highlighted.  */

static
XTchange_line_highlight (new_highlight, vpos, first_unused_hpos)
     int new_highlight, vpos, first_unused_hpos;
{
  highlight = new_highlight;
  XTcursor_to (vpos, 0);
Jim Blandy's avatar
Jim Blandy committed
351
  XTclear_end_of_line (updating_frame->width);
Jim Blandy's avatar
Jim Blandy committed
352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369
}

/* This is used when starting Emacs and when restarting after suspend.
   When starting Emacs, no X window is mapped.  And nothing must be done
   to Emacs's own window if it is suspended (though that rarely happens).  */

static
XTset_terminal_modes ()
{
}

/* This is called when exiting or suspending Emacs.
   Exiting will make the X-windows go away, and suspending
   requires no action.  */

static
XTreset_terminal_modes ()
{
Jim Blandy's avatar
Jim Blandy committed
370
/*  XTclear_frame ();  */
Jim Blandy's avatar
Jim Blandy committed
371 372
}

373 374
/* Set the nominal cursor position of the frame.
   This is where display update commands will take effect.
Jim Blandy's avatar
Jim Blandy committed
375 376
   This does not affect the place where the cursor-box is displayed.  */

Jim Blandy's avatar
Jim Blandy committed
377
static int
Jim Blandy's avatar
Jim Blandy committed
378 379 380 381 382 383 384 385 386
XTcursor_to (row, col)
     register int row, col;
{
  int mask;
  int orow = row;

  curs_x = col;
  curs_y = row;

Jim Blandy's avatar
Jim Blandy committed
387
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
388 389
    {
      BLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
390
      x_display_cursor (selected_frame, 1);
Jim Blandy's avatar
Jim Blandy committed
391 392 393 394 395 396 397 398 399
      XFlushQueue ();
      UNBLOCK_INPUT;
    }
}

/* Display a sequence of N glyphs found at GP.
   WINDOW is the x-window to output to.  LEFT and TOP are starting coords.
   HL is 1 if this text is highlighted, 2 if the cursor is on it.

400
   FONT is the default font to use (for glyphs whose font-code is 0).
Jim Blandy's avatar
Jim Blandy committed
401

402 403 404 405 406
   Since the display generation code is responsible for calling
   compute_char_face and compute_glyph_face on everything it puts in
   the display structure, we can assume that the face code on each
   glyph is a valid index into FRAME_FACES (f), and the one to which
   we can actually apply intern_face.  */
Jim Blandy's avatar
Jim Blandy committed
407

408 409
#if 1
/* This is the multi-face code.  */
Jim Blandy's avatar
Jim Blandy committed
410 411

static void
412
dumpglyphs (f, left, top, gp, n, hl)
Jim Blandy's avatar
Jim Blandy committed
413
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
414 415 416 417 418
     int left, top;
     register GLYPH *gp; /* Points to first GLYPH. */
     register int n;  /* Number of glyphs to display. */
     int hl;
{
419 420
  /* Holds characters to be displayed. */
  char *buf = (char *) alloca (f->width * sizeof (*buf));
Jim Blandy's avatar
Jim Blandy committed
421 422 423
  register char *cp;		/* Steps through buf[]. */
  register int tlen = GLYPH_TABLE_LENGTH;
  register Lisp_Object *tbase = GLYPH_TABLE_BASE;
424
  Window window = FRAME_X_WINDOW (f);
Jim Blandy's avatar
Jim Blandy committed
425

426 427 428
  extern struct face *intern_face (/* FRAME_PTR, struct face * */);

  while (n > 0)
Jim Blandy's avatar
Jim Blandy committed
429 430 431 432 433
    {
      /* Get the face-code of the next GLYPH.  */
      int cf, len;
      int g = *gp;

434 435
      GLYPH_FOLLOW_ALIASES (tbase, tlen, g);
      cf = GLYPH_FACE (g);
Jim Blandy's avatar
Jim Blandy committed
436 437 438 439 440 441 442

      /* Find the run of consecutive glyphs with the same face-code.
	 Extract their character codes into BUF.  */
      cp = buf;
      while (n > 0)
	{
	  g = *gp;
443 444
	  GLYPH_FOLLOW_ALIASES (tbase, tlen, g);
	  if (GLYPH_FACE (g) != cf)
Jim Blandy's avatar
Jim Blandy committed
445 446
	    break;

447
	  *cp++ = GLYPH_CHAR (g);
Jim Blandy's avatar
Jim Blandy committed
448 449 450 451 452 453 454 455 456
	  --n;
	  ++gp;
	}

      /* LEN gets the length of the run.  */
      len = cp - buf;

      /* Now output this run of chars, with the font and pixel values
	 determined by the face code CF.  */
457 458 459 460
      {
	struct face *face = FRAME_DEFAULT_FACE (f);
	FONT_TYPE *font = FACE_FONT (face);
	GC gc = FACE_GC (face);
461 462
	int defaulted = 1;
	int gc_temporary = 0;
463

464 465
	/* First look at the face of the text itself.  */
	if (cf != 0)
466 467 468 469 470 471 472 473 474
	  {
	    /* The face codes on the glyphs must be valid indices into the
	       frame's face table.  */
	    if (cf < 0 || cf >= FRAME_N_FACES (f))
	      abort ();

	    if (cf == 1)
	      face = FRAME_MODE_LINE_FACE (f);
	    else
475
	      face = intern_face (f, FRAME_FACES (f) [cf]);
476 477
	    font = FACE_FONT (face);
	    gc = FACE_GC (face);
478
	    defaulted = 0;
479
	  }
480 481

	/* Then comes the distinction between modeline and normal text.  */
482 483 484 485 486 487 488
	else if (hl == 0)
	  ;
	else if (hl == 1)
	  {
	    face = FRAME_MODE_LINE_FACE (f);
	    font = FACE_FONT (face);
	    gc   = FACE_GC   (face);
489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517
	    defaulted = 0;
	  }

#define FACE_DEFAULT (~0)

	/* Now override that if the cursor's on this character.  */
	if (hl == 2 && (defaulted
			|| !(face->font && (int) face->font != FACE_DEFAULT)))
	  {
	    gc = f->display.x->cursor_gc;
	  }
	/* Cursor on non-default face: must merge.  */
	else if (hl == 2)
	  {
	    XGCValues xgcv;
	    unsigned long mask;

	    xgcv.background = f->display.x->cursor_pixel;
	    xgcv.foreground = f->display.x->cursor_foreground_pixel;
	    xgcv.font = face->font->fid;
	    xgcv.graphics_exposures = 0;
	    mask = GCForeground | GCBackground | GCFont | GCGraphicsExposures;
	    gc = XCreateGC (x_current_display, FRAME_X_WINDOW (f),
			    mask, &xgcv);
#if 0
	    if (face->stipple && face->stipple != FACE_DEFAULT)
	      XSetStipple (x_current_display, gc, face->stipple);
#endif
	    gc_temporary = 1;
518 519 520 521 522
	  }

	XDrawImageString (x_current_display, window, gc,
			  left, top + FONT_BASE (font), buf, len);

523 524 525
	if (gc_temporary)
	  XFreeGC (x_current_display, gc);

526 527 528
	/* We should probably check for XA_UNDERLINE_POSITION and
	   XA_UNDERLINE_THICKNESS properties on the font, but let's
	   just get the thing working, and come back to that.  */
Jim Blandy's avatar
Jim Blandy committed
529
	{
530
	  int underline_position = 1;
531

532 533
	  if (font->descent <= underline_position)
	    underline_position = font->descent - 1;
534 535 536 537 538 539 540 541

	  if (face->underline)
	    XFillRectangle (x_current_display, FRAME_X_WINDOW (f),
			    FACE_GC (face),
			    left, (top
				   + FONT_BASE (font)
				   + underline_position),
			    len * FONT_WIDTH (font), 1);
Jim Blandy's avatar
Jim Blandy committed
542
	}
543 544 545

	left += len * FONT_WIDTH (font);
      }
Jim Blandy's avatar
Jim Blandy committed
546 547
    }
}
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579
#endif /* 1 */

#if 0
/* This is the old single-face code.  */

static void
dumpglyphs (f, left, top, gp, n, hl, font)
     struct frame *f;
     int left, top;
     register GLYPH *gp; /* Points to first GLYPH. */
     register int n;  /* Number of glyphs to display. */
     int hl;
     FONT_TYPE *font;
{
  register int len;
  Window window = FRAME_X_WINDOW (f);
  GC drawing_gc =   (hl == 2 ? f->display.x->cursor_gc
		             : (hl ? f->display.x->reverse_gc
				   : f->display.x->normal_gc));

  if (sizeof (GLYPH) == sizeof (XChar2b))
    XDrawImageString16 (x_current_display, window, drawing_gc,
			left, top + FONT_BASE (font), (XChar2b *) gp, n);
  else if (sizeof (GLYPH) == sizeof (unsigned char))
    XDrawImageString (x_current_display, window, drawing_gc,
		      left, top + FONT_BASE (font), (char *) gp, n);
  else
    /* What size of glyph ARE you using?  And does X have a function to
       draw them?  */
    abort ();
}
#endif
Jim Blandy's avatar
Jim Blandy committed
580

581 582
/* Output some text at the nominal frame cursor position.
   Advance the cursor over the text.
Jim Blandy's avatar
Jim Blandy committed
583 584 585 586 587 588 589 590 591 592 593 594
   Output LEN glyphs at START.

   `highlight', set up by XTreassert_line_highlight or XTchange_line_highlight,
   controls the pixel values used for foreground and background.  */

static
XTwrite_glyphs (start, len)
     register GLYPH *start;
     int len;
{
  register int temp_length;
  int mask;
Jim Blandy's avatar
Jim Blandy committed
595
  struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
596 597 598

  BLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
599 600
  f = updating_frame;
  if (f == 0)
Jim Blandy's avatar
Jim Blandy committed
601
    {
Jim Blandy's avatar
Jim Blandy committed
602
      f = selected_frame;
Jim Blandy's avatar
Jim Blandy committed
603
      /* If not within an update,
Jim Blandy's avatar
Jim Blandy committed
604 605 606
	 output at the frame's visible cursor.  */
      curs_x = f->cursor_x;
      curs_y = f->cursor_y;
Jim Blandy's avatar
Jim Blandy committed
607 608
    }

Jim Blandy's avatar
Jim Blandy committed
609
  dumpglyphs (f,
610 611
	      CHAR_TO_PIXEL_COL (f, curs_x),
	      CHAR_TO_PIXEL_ROW (f, curs_y),
612
	      start, len, highlight);
Jim Blandy's avatar
Jim Blandy committed
613 614

  /* If we drew on top of the cursor, note that it is turned off.  */
Jim Blandy's avatar
Jim Blandy committed
615 616 617 618
  if (curs_y == f->phys_cursor_y
      && curs_x <= f->phys_cursor_x
      && curs_x + len > f->phys_cursor_x)
    f->phys_cursor_x = -1;
Jim Blandy's avatar
Jim Blandy committed
619
  
Jim Blandy's avatar
Jim Blandy committed
620
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
621
    {
Jim Blandy's avatar
Jim Blandy committed
622 623 624
      f->cursor_x += len;
      x_display_cursor (f, 1);
      f->cursor_x -= len;
Jim Blandy's avatar
Jim Blandy committed
625 626 627 628 629 630 631
    }
  else
    curs_x += len;

  UNBLOCK_INPUT;
}

632 633
/* Clear to the end of the line.
   Erase the current text line from the nominal cursor position (inclusive)
Jim Blandy's avatar
Jim Blandy committed
634 635 636
   to column FIRST_UNUSED (exclusive).  The idea is that everything
   from FIRST_UNUSED onward is already erased.  */
  
Jim Blandy's avatar
Jim Blandy committed
637
static int
Jim Blandy's avatar
Jim Blandy committed
638 639 640
XTclear_end_of_line (first_unused)
     register int first_unused;
{
Jim Blandy's avatar
Jim Blandy committed
641
  struct frame *f = updating_frame;
Jim Blandy's avatar
Jim Blandy committed
642 643
  int mask;

Jim Blandy's avatar
Jim Blandy committed
644
  if (f == 0)
Jim Blandy's avatar
Jim Blandy committed
645 646
    abort ();

Jim Blandy's avatar
Jim Blandy committed
647
  if (curs_y < 0 || curs_y >= f->height)
Jim Blandy's avatar
Jim Blandy committed
648 649 650 651
    return;
  if (first_unused <= 0)
    return;

Jim Blandy's avatar
Jim Blandy committed
652 653
  if (first_unused >= f->width)
    first_unused = f->width;
Jim Blandy's avatar
Jim Blandy committed
654 655 656

  BLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
657
  /* Notice if the cursor will be cleared by this operation.  */
Jim Blandy's avatar
Jim Blandy committed
658 659 660 661
  if (curs_y == f->phys_cursor_y
      && curs_x <= f->phys_cursor_x
      && f->phys_cursor_x < first_unused)
    f->phys_cursor_x = -1;
Jim Blandy's avatar
Jim Blandy committed
662 663

#ifdef HAVE_X11
664
  XClearArea (x_current_display, FRAME_X_WINDOW (f),
665 666
	      CHAR_TO_PIXEL_COL (f, curs_x),
	      CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
667 668
	      FONT_WIDTH (f->display.x->font) * (first_unused - curs_x),
	      FONT_HEIGHT (f->display.x->font), False);
Jim Blandy's avatar
Jim Blandy committed
669
	      
670 671
#else /* ! defined (HAVE_X11) */
  XPixSet (FRAME_X_WINDOW (f),
672 673
	   CHAR_TO_PIXEL_COL (f, curs_x),
	   CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
674 675 676
	   FONT_WIDTH (f->display.x->font) * (first_unused - curs_x),
	   FONT_HEIGHT (f->display.x->font),
	   f->display.x->background_pixel);	
677
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
678 679 680 681 682

  UNBLOCK_INPUT;
}

static
Jim Blandy's avatar
Jim Blandy committed
683
XTclear_frame ()
Jim Blandy's avatar
Jim Blandy committed
684 685
{
  int mask;
Jim Blandy's avatar
Jim Blandy committed
686
  struct frame *f = updating_frame;
Jim Blandy's avatar
Jim Blandy committed
687

Jim Blandy's avatar
Jim Blandy committed
688 689
  if (f == 0)
    f = selected_frame;
Jim Blandy's avatar
Jim Blandy committed
690

Jim Blandy's avatar
Jim Blandy committed
691
  f->phys_cursor_x = -1;	/* Cursor not visible.  */
Jim Blandy's avatar
Jim Blandy committed
692 693 694 695
  curs_x = 0;			/* Nominal cursor position is top left.  */
  curs_y = 0;
  
  BLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
696

697
  XClear (FRAME_X_WINDOW (f));
Jim Blandy's avatar
Jim Blandy committed
698

699
  /* We have to clear the scroll bars, too.  If we have changed
Jim Blandy's avatar
Jim Blandy committed
700
     colors or something like that, then they should be notified.  */
701
  x_scroll_bar_clear (f);
Jim Blandy's avatar
Jim Blandy committed
702

Jim Blandy's avatar
Jim Blandy committed
703
#ifndef HAVE_X11
Jim Blandy's avatar
Jim Blandy committed
704
  dumpborder (f, 0);
705
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
706

Jim Blandy's avatar
Jim Blandy committed
707 708 709 710
  XFlushQueue ();
  UNBLOCK_INPUT;
}

Jim Blandy's avatar
Jim Blandy committed
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
/* Invert the middle quarter of the frame for .15 sec.  */

/* We use the select system call to do the waiting, so we have to make sure
   it's avaliable.  If it isn't, we just won't do visual bells.  */
#if defined (HAVE_TIMEVAL) && defined (HAVE_SELECT)

/* Subtract the `struct timeval' values X and Y,
   storing the result in RESULT.
   Return 1 if the difference is negative, otherwise 0.  */

static int
timeval_subtract (result, x, y)
     struct timeval *result, x, y;
{
  /* Perform the carry for the later subtraction by updating y.
     This is safer because on some systems
     the tv_sec member is unsigned.  */
  if (x.tv_usec < y.tv_usec)
    {
      int nsec = (y.tv_usec - x.tv_usec) / 1000000 + 1;
      y.tv_usec -= 1000000 * nsec;
      y.tv_sec += nsec;
    }
  if (x.tv_usec - y.tv_usec > 1000000)
    {
      int nsec = (y.tv_usec - x.tv_usec) / 1000000;
      y.tv_usec += 1000000 * nsec;
      y.tv_sec -= nsec;
    }

  /* Compute the time remaining to wait.  tv_usec is certainly positive.  */
  result->tv_sec = x.tv_sec - y.tv_sec;
  result->tv_usec = x.tv_usec - y.tv_usec;

  /* Return indication of whether the result should be considered negative.  */
  return x.tv_sec < y.tv_sec;
}
Jim Blandy's avatar
Jim Blandy committed
748

Jim Blandy's avatar
Jim Blandy committed
749 750
XTflash (f)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
751
{
Jim Blandy's avatar
Jim Blandy committed
752
  BLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
753

Jim Blandy's avatar
Jim Blandy committed
754 755
  {
    GC gc;
Jim Blandy's avatar
Jim Blandy committed
756

Jim Blandy's avatar
Jim Blandy committed
757 758 759 760
    /* Create a GC that will use the GXxor function to flip foreground pixels
       into background pixels.  */
    {
      XGCValues values;
Jim Blandy's avatar
Jim Blandy committed
761

Jim Blandy's avatar
Jim Blandy committed
762 763 764 765 766 767 768
      values.function = GXxor;
      values.foreground = (f->display.x->foreground_pixel
			   ^ f->display.x->background_pixel);
      
      gc = XCreateGC (x_current_display, FRAME_X_WINDOW (f),
		      GCFunction | GCForeground, &values);
    }
Jim Blandy's avatar
Jim Blandy committed
769

Jim Blandy's avatar
Jim Blandy committed
770 771 772
    {
      int width  = PIXEL_WIDTH  (f);
      int height = PIXEL_HEIGHT (f);
Jim Blandy's avatar
Jim Blandy committed
773

Jim Blandy's avatar
Jim Blandy committed
774 775 776
      XFillRectangle (x_current_display, FRAME_X_WINDOW (f), gc,
		      width/4, height/4, width/2, height/2);
      XFlush (x_current_display);
Jim Blandy's avatar
Jim Blandy committed
777

Jim Blandy's avatar
Jim Blandy committed
778 779
      {
	struct timeval wakeup, now;
Jim Blandy's avatar
Jim Blandy committed
780

Jim Blandy's avatar
Jim Blandy committed
781
	gettimeofday (&wakeup, (struct timezone *) 0);
Jim Blandy's avatar
Jim Blandy committed
782

Jim Blandy's avatar
Jim Blandy committed
783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808
	/* Compute time to wait until, propagating carry from usecs.  */
	wakeup.tv_usec += 150000;
	wakeup.tv_sec += (wakeup.tv_usec / 1000000);
	wakeup.tv_usec %= 1000000;

	/* Keep waiting until past the time wakeup.  */
	while (1)
	  {
	    struct timeval timeout;

	    gettimeofday (&timeout, (struct timezone *)0);

	    /* In effect, timeout = wakeup - timeout.
	       Break if result would be negative.  */
	    if (timeval_subtract (&timeout, wakeup, timeout))
	      break;

	    /* Try to wait that long--but we might wake up sooner.  */
	    select (0, 0, 0, 0, &timeout);
	  }
      }
	
      XFillRectangle (x_current_display, FRAME_X_WINDOW (f), gc,
		      width/4, height/4, width/2, height/2);
      XFreeGC (x_current_display, gc);
      XFlush (x_current_display);
Jim Blandy's avatar
Jim Blandy committed
809
    }
Jim Blandy's avatar
Jim Blandy committed
810 811 812
  }

  UNBLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
813 814
}

Jim Blandy's avatar
Jim Blandy committed
815 816 817
#endif


Jim Blandy's avatar
Jim Blandy committed
818 819 820 821
/* Make audible bell.  */

#ifdef HAVE_X11
#define XRINGBELL XBell(x_current_display, 0)
822
#else /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
823
#define XRINGBELL XFeep(0);
824
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
825 826 827

XTring_bell ()
{
Jim Blandy's avatar
Jim Blandy committed
828
#if defined (HAVE_TIMEVAL) && defined (HAVE_SELECT)
Jim Blandy's avatar
Jim Blandy committed
829
  if (visible_bell)
Jim Blandy's avatar
Jim Blandy committed
830
    XTflash (selected_frame);
Jim Blandy's avatar
Jim Blandy committed
831
  else
Jim Blandy's avatar
Jim Blandy committed
832
#endif
Jim Blandy's avatar
Jim Blandy committed
833 834 835 836 837 838 839 840
    {
      BLOCK_INPUT;
      XRINGBELL;
      XFlushQueue ();
      UNBLOCK_INPUT;
    }
}

841 842 843
/* Insert and delete character.
   These are not supposed to be used because we are supposed to turn
   off the feature of using them.  */
Jim Blandy's avatar
Jim Blandy committed
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868

static 
XTinsert_glyphs (start, len)
     register char *start;
     register int len;
{
  abort ();
}

static 
XTdelete_glyphs (n)
     register int n;
{
  abort ();
}

/* Specify how many text lines, from the top of the window,
   should be affected by insert-lines and delete-lines operations.
   This, and those operations, are used only within an update
   that is bounded by calls to XTupdate_begin and XTupdate_end.  */

static
XTset_terminal_window (n)
     register int n;
{
Jim Blandy's avatar
Jim Blandy committed
869
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
870 871
    abort ();

Jim Blandy's avatar
Jim Blandy committed
872 873
  if ((n <= 0) || (n > updating_frame->height))
    flexlines = updating_frame->height;
Jim Blandy's avatar
Jim Blandy committed
874 875 876 877
  else
    flexlines = n;
}

878 879
/* Perform an insert-lines operation.
   Insert N lines at a vertical position curs_y.  */
Jim Blandy's avatar
Jim Blandy committed
880 881 882 883 884 885 886

static void
stufflines (n)
     register int n;
{
  register int topregion, bottomregion;
  register int length, newtop, mask;
Jim Blandy's avatar
Jim Blandy committed
887 888
  register struct frame *f = updating_frame;
  int intborder = f->display.x->internal_border_width;
Jim Blandy's avatar
Jim Blandy committed
889 890 891 892 893 894 895 896 897 898 899

  if (curs_y >= flexlines)
    return;

  topregion = curs_y;
  bottomregion = flexlines - (n + 1);
  newtop = topregion + n;
  length = (bottomregion - topregion) + 1;

#ifndef HAVE_X11
  dumpqueue ();
900
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
901 902 903 904

  if ((length > 0) && (newtop <= flexlines))
    {
#ifdef HAVE_X11
905 906
      XCopyArea (x_current_display, FRAME_X_WINDOW (f),
		 FRAME_X_WINDOW (f), f->display.x->normal_gc,
907
		 intborder, CHAR_TO_PIXEL_ROW (f, topregion),
Jim Blandy's avatar
Jim Blandy committed
908 909
		 f->width * FONT_WIDTH (f->display.x->font),
		 length * FONT_HEIGHT (f->display.x->font), intborder,
910
		 CHAR_TO_PIXEL_ROW (f, newtop));
911 912
#else /* ! defined (HAVE_X11) */
      XMoveArea (FRAME_X_WINDOW (f),
913 914
		 intborder, CHAR_TO_PIXEL_ROW (f, topregion),
		 intborder, CHAR_TO_PIXEL_ROW (f, newtop),
Jim Blandy's avatar
Jim Blandy committed
915 916
		 f->width * FONT_WIDTH (f->display.x->font),
		 length * FONT_HEIGHT (f->display.x->font));
Jim Blandy's avatar
Jim Blandy committed
917 918 919 920 921
      /* Now we must process any ExposeRegion events that occur
	 if the area being copied from is obscured.
	 We can't let it wait because further i/d operations
	 may want to copy this area to another area.  */
      x_read_exposes ();
922
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
923 924 925 926 927 928 929
    }

  newtop = min (newtop, (flexlines - 1));
  length = newtop - topregion;
  if (length > 0)
    {
#ifdef HAVE_X11
930
      XClearArea (x_current_display, FRAME_X_WINDOW (f), intborder, 
931
		  CHAR_TO_PIXEL_ROW (f, topregion),
Jim Blandy's avatar
Jim Blandy committed
932 933
		  f->width * FONT_WIDTH (f->display.x->font),
		  n * FONT_HEIGHT (f->display.x->font), False);
934 935
#else /* ! defined (HAVE_X11) */
      XPixSet (FRAME_X_WINDOW (f),
Jim Blandy's avatar
Jim Blandy committed
936
	       intborder,
937
	       CHAR_TO_PIXEL_ROW (f, topregion),
Jim Blandy's avatar
Jim Blandy committed
938 939 940
	       f->width * FONT_WIDTH (f->display.x->font),
	       n * FONT_HEIGHT (f->display.x->font),
	       f->display.x->background_pixel);
941
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
942 943 944 945 946 947 948 949 950 951 952
    }
}

/* Perform a delete-lines operation, deleting N lines
   at a vertical position curs_y.  */

static void
scraplines (n)
     register int n;
{
  int mask;
Jim Blandy's avatar
Jim Blandy committed
953 954
  register struct frame *f = updating_frame;
  int intborder = f->display.x->internal_border_width;
Jim Blandy's avatar
Jim Blandy committed
955 956 957 958 959 960

  if (curs_y >= flexlines)
    return;

#ifndef HAVE_X11
  dumpqueue ();
961
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
962 963 964 965 966 967

  if ((curs_y + n) >= flexlines)
    {
      if (flexlines >= (curs_y + 1))
	{
#ifdef HAVE_X11
968
	  XClearArea (x_current_display, FRAME_X_WINDOW (f), intborder,
969
		      CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
970 971
		      f->width * FONT_WIDTH (f->display.x->font),
		      (flexlines - curs_y) * FONT_HEIGHT (f->display.x->font), False);
972 973
#else /* ! defined (HAVE_X11) */
	  XPixSet (FRAME_X_WINDOW (f),
974
		   intborder, CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
975 976 977
		   f->width * FONT_WIDTH (f->display.x->font),
		   (flexlines - curs_y) * FONT_HEIGHT (f->display.x->font),
		   f->display.x->background_pixel);
978
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
979 980 981 982 983
	}
    }
  else
    {
#ifdef HAVE_X11
984 985
      XCopyArea (x_current_display, FRAME_X_WINDOW (f),
		 FRAME_X_WINDOW (f), f->display.x->normal_gc,
Jim Blandy's avatar
Jim Blandy committed
986
		 intborder,
987
		 CHAR_TO_PIXEL_ROW (f, curs_y + n),
Jim Blandy's avatar
Jim Blandy committed
988 989
		 f->width * FONT_WIDTH (f->display.x->font),
		 (flexlines - (curs_y + n)) * FONT_HEIGHT (f->display.x->font),
990
		 intborder, CHAR_TO_PIXEL_ROW (f, curs_y));
991
      XClearArea (x_current_display, FRAME_X_WINDOW (f),
Jim Blandy's avatar
Jim Blandy committed
992
		  intborder,
993
		  CHAR_TO_PIXEL_ROW (f, flexlines - n),
Jim Blandy's avatar
Jim Blandy committed
994 995
		  f->width * FONT_WIDTH (f->display.x->font),
		  n * FONT_HEIGHT (f->display.x->font), False);
996 997
#else /* ! defined (HAVE_X11) */
      XMoveArea (FRAME_X_WINDOW (f),
Jim Blandy's avatar
Jim Blandy committed
998
		 intborder,
999 1000
		 CHAR_TO_PIXEL_ROW (f, curs_y + n),
		 intborder, CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
1001 1002
		 f->width * FONT_WIDTH (f->display.x->font),
		 (flexlines - (curs_y + n)) * FONT_HEIGHT (f->display.x->font));
Jim Blandy's avatar
Jim Blandy committed
1003 1004 1005 1006 1007
      /* Now we must process any ExposeRegion events that occur
	 if the area being copied from is obscured.
	 We can't let it wait because further i/d operations
	 may want to copy this area to another area.  */
      x_read_exposes ();
1008
      XPixSet (FRAME_X_WINDOW (f), intborder,
1009
	       CHAR_TO_PIXEL_ROW (f, flexlines - n),
Jim Blandy's avatar
Jim Blandy committed
1010 1011
	       f->width * FONT_WIDTH (f->display.x->font),
	       n * FONT_HEIGHT (f->display.x->font), f->display.x->background_pixel);
1012
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
1013 1014 1015 1016 1017 1018 1019 1020 1021
    }
}

/* Perform an insert-lines or delete-lines operation,
   inserting N lines or deleting -N lines at vertical position VPOS.  */

XTins_del_lines (vpos, n)
     int vpos, n;
{
Jim Blandy's avatar
Jim Blandy committed
1022
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
1023 1024
    abort ();

Jim Blandy's avatar
Jim Blandy committed
1025
  /* Hide the cursor.  */
Jim Blandy's avatar
Jim Blandy committed
1026
  x_display_cursor (updating_frame, 0);
Jim Blandy's avatar
Jim Blandy committed
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038

  XTcursor_to (vpos, 0);

  BLOCK_INPUT;
  if (n >= 0)
    stufflines (n);
  else
    scraplines (-n);
  XFlushQueue ();
  UNBLOCK_INPUT;
}

1039
/* Support routines for exposure events.  */
Jim Blandy's avatar
Jim Blandy committed
1040 1041
static void clear_cursor ();

Jim Blandy's avatar
Jim Blandy committed
1042 1043
/* Output into a rectangle of an X-window (for frame F)
   the characters in f->phys_lines that overlap that rectangle.
Jim Blandy's avatar
Jim Blandy committed
1044 1045 1046 1047
   TOP and LEFT are the position of the upper left corner of the rectangle.
   ROWS and COLS are the size of the rectangle.  */

static void
Jim Blandy's avatar
Jim Blandy committed
1048 1049
dumprectangle (f, left, top, cols, rows)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
1050 1051
     register int left, top, cols, rows;
{
Jim Blandy's avatar
Jim Blandy committed
1052
  register struct frame_glyphs *active_frame = FRAME_CURRENT_GLYPHS (f);
Jim Blandy's avatar
Jim Blandy committed
1053 1054 1055 1056
  int cursor_cleared = 0;
  int bottom, right;
  register int y;

Jim Blandy's avatar
Jim Blandy committed
1057
  if (FRAME_GARBAGED_P (f))
Jim Blandy's avatar
Jim Blandy committed
1058 1059 1060 1061 1062 1063 1064
    return;

  /* Express rectangle as four edges, instead of position-and-size.  */
  bottom = top + rows;
  right = left + cols;

#ifndef HAVE_X11		/* Window manger does this for X11. */
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
  {
    int intborder = f->display.x->internal_border_width;

    /* If the rectangle includes any of the internal border area,
       redisplay the border emphasis.  */
    if (top < intborder || left < intborder
	|| bottom > intborder + f->height * FONT_HEIGHT (f->display.x->font)
	|| right > intborder + f->width * FONT_WIDTH (f->display.x->font))
      dumpborder (f, 0);
  }
1075
#endif /* HAVE_X11		/* Window manger does this for X11. */ */
Jim Blandy's avatar
Jim Blandy committed
1076 1077 1078
  
  /* Convert rectangle edges in pixels to edges in chars.
     Round down for left and top, up for right and bottom.  */
1079 1080
  top  = PIXEL_TO_CHAR_ROW (f, top);
  left = PIXEL_TO_CHAR_COL (f, left);
Jim Blandy's avatar
Jim Blandy committed
1081 1082
  bottom += (FONT_HEIGHT (f->display.x->font) - 1);
  right += (FONT_WIDTH (f->display.x->font) - 1);
1083 1084
  bottom = PIXEL_TO_CHAR_ROW (f, bottom);
  right = PIXEL_TO_CHAR_COL (f, right);
Jim Blandy's avatar
Jim Blandy committed
1085 1086 1087 1088 1089 1090

  /* Clip the rectangle to what can be visible.  */
  if (left < 0)
    left = 0;
  if (top < 0)
    top = 0;
Jim Blandy's avatar
Jim Blandy committed
1091 1092 1093 1094
  if (right > f->width)
    right = f->width;
  if (bottom > f->height)
    bottom = f->height;
Jim Blandy's avatar
Jim Blandy committed
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105

  /* Get size in chars of the rectangle.  */
  cols = right - left;
  rows = bottom - top;

  /* If rectangle has zero area, return.  */
  if (rows <= 0) return;
  if (cols <= 0) return;

  /* Turn off the cursor if it is in the rectangle.
     We will turn it back on afterward.  */
Jim Blandy's avatar
Jim Blandy committed
1106 1107
  if ((f->phys_cursor_x >= left) && (f->phys_cursor_x < right)
      && (f->phys_cursor_y >= top) && (f->phys_cursor_y < bottom))
Jim Blandy's avatar
Jim Blandy committed
1108
    {
Jim Blandy's avatar
Jim Blandy committed
1109
      clear_cursor (f);
Jim Blandy's avatar
Jim Blandy committed
1110 1111 1112 1113 1114 1115 1116
      cursor_cleared = 1;
    }

  /* Display the text in the rectangle, one text line at a time.  */

  for (y = top; y < bottom; y++)
    {
Jim Blandy's avatar
Jim Blandy committed
1117
      GLYPH *line = &active_frame->glyphs[y][left];
Jim Blandy's avatar
Jim Blandy committed
1118

Jim Blandy's avatar
Jim Blandy committed
1119
      if (! active_frame->enable[y] || left > active_frame->used[y])
Jim Blandy's avatar
Jim Blandy committed
1120 1121
	continue;

Jim Blandy's avatar
Jim Blandy committed
1122
      dumpglyphs (f,
1123 1124 1125
		  CHAR_TO_PIXEL_COL (f, left),
		  CHAR_TO_PIXEL_ROW (f, y),
		  line, min (cols, active_frame->used[y] - left),
1126
		  active_frame->highlight[y]);
Jim Blandy's avatar
Jim Blandy committed
1127 1128 1129 1130 1131
    }

  /* Turn the cursor on if we turned it off.  */

  if (cursor_cleared)
Jim Blandy's avatar
Jim Blandy committed
1132
    x_display_cursor (f, 1);
Jim Blandy's avatar
Jim Blandy committed
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
}

#ifndef HAVE_X11
/* Process all queued ExposeRegion events. */

static void
dumpqueue ()
{
  register int i;
  XExposeRegionEvent r;

  while (dequeue_event (&r, &x_expose_queue))
    {
Jim Blandy's avatar
Jim Blandy committed
1146 1147 1148
      struct frame *f = x_window_to_frame (r.window);
      if (f->display.x->icon_desc == r.window)
	refreshicon (f);
Jim Blandy's avatar
Jim Blandy committed
1149
      else
Jim Blandy's avatar
Jim Blandy committed
1150
	dumprectangle (f, r.x, r.y, r.width, r.height);
Jim Blandy's avatar
Jim Blandy committed
1151 1152 1153
    }
  XFlushQueue ();
}
1154
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
1155

1156
/* Process all expose events that are pending, for X10.
Jim Blandy's avatar
Jim Blandy committed
1157 1158
   Redraws the cursor if necessary on any frame that
   is not in the process of being updated with update_frame.  */
Jim Blandy's avatar
Jim Blandy committed
1159

1160
#ifndef HAVE_X11
Jim Blandy's avatar
Jim Blandy committed
1161 1162 1163 1164
static void
x_do_pending_expose ()
{
  int mask;
Jim Blandy's avatar
Jim Blandy committed
1165 1166
  struct frame *f;
  Lisp_Object tail, frame;
Jim Blandy's avatar
Jim Blandy committed
1167 1168 1169 1170

  if (expose_all_windows)
    {
      expose_all_windows = 0;
Jim Blandy's avatar
Jim Blandy committed
1171
      for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
Jim Blandy's avatar
Jim Blandy committed
1172 1173 1174 1175
	{
	  register int temp_width, temp_height;
	  int intborder;

Jim Blandy's avatar
Jim Blandy committed
1176
	  frame = XCONS (tail)->car;
1177
	  if (XGCTYPE (frame) != Lisp_Frame)
Jim Blandy's avatar
Jim Blandy committed
1178
	    continue;
Jim Blandy's avatar
Jim Blandy committed
1179
	  f = XFRAME (frame);
1180
	  if (! FRAME_X_P (f))
Jim Blandy's avatar
Jim Blandy committed
1181
	    continue;
1182
	  if (!f->async_visible)
Jim Blandy's avatar
Jim Blandy committed
1183
	    continue;
Jim Blandy's avatar
Jim Blandy committed
1184
	  if (!f->display.x->needs_exposure)
Jim Blandy's avatar
Jim Blandy committed
1185