xterm.c 145 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
/* Xt features made by Fred Pierresteguy.  */

30 31
#define NEW_SELECTIONS

32 33 34 35 36 37
/* 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>

38
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
39

40
/* Need syssignal.h for various externs and definitions that may be required
41
   by some configurations for calls to signal later in this source file.  */
42 43
#include "syssignal.h"

Jim Blandy's avatar
Jim Blandy committed
44 45 46
#ifdef HAVE_X_WINDOWS

#include "lisp.h"
47
#include "blockinput.h"
Jim Blandy's avatar
Jim Blandy committed
48 49 50 51

/* This may include sys/types.h, and that somehow loses
   if this is not done before the other system files.  */
#include "xterm.h"
52
#include <X11/cursorfont.h>
Jim Blandy's avatar
Jim Blandy committed
53

54
#ifndef USG
Jim Blandy's avatar
Jim Blandy committed
55 56 57 58
/* Load sys/types.h if not already loaded.
   In some systems loading it twice is suicidal.  */
#ifndef makedev
#include <sys/types.h>
59 60
#endif /* makedev */
#endif /* USG */
Jim Blandy's avatar
Jim Blandy committed
61 62 63 64

#ifdef BSD
#include <sys/ioctl.h>
#include <strings.h>
65
#else /* ! defined (BSD) */
66
#ifndef VMS
Jim Blandy's avatar
Jim Blandy committed
67
#include <string.h>
68
#endif
69
#endif /* ! defined (BSD) */
Jim Blandy's avatar
Jim Blandy committed
70

71
#include "systty.h"
Jim Blandy's avatar
Jim Blandy committed
72
#include "systime.h"
Jim Blandy's avatar
Jim Blandy committed
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

#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"
88
#endif /* ! 0 */
Jim Blandy's avatar
Jim Blandy committed
89
#include "gnu.h"
Jim Blandy's avatar
Jim Blandy committed
90
#include "frame.h"
Jim Blandy's avatar
Jim Blandy committed
91 92
#include "disptab.h"
#include "buffer.h"
93
#include "window.h"
Jim Blandy's avatar
Jim Blandy committed
94

95 96 97
#ifdef USE_X_TOOLKIT
extern XtAppContext Xt_app_con;
extern Widget Xt_app_shell;
98
extern void free_frame_menubar ();
99 100
#endif /* USE_X_TOOLKIT */

101 102 103 104
#ifndef USE_X_TOOLKIT
#define x_any_window_to_frame x_window_to_frame
#endif

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

112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
#ifdef FD_SET
/* We could get this from param.h, but better not to depend on finding that.
   And better not to risk that it might define other symbols used in this
   file.  */
#ifdef FD_SETSIZE
#define MAXDESC FD_SETSIZE
#else
#define MAXDESC 64
#endif
#define SELECT_TYPE fd_set
#else /* no FD_SET */
#define MAXDESC 32
#define SELECT_TYPE int

/* Define the macros to access a single-int bitmap of descriptors.  */
#define FD_SET(n, p) (*(p) |= (1 << (n)))
#define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
#define FD_ISSET(n, p) (*(p) & (1 << (n)))
#define FD_ZERO(p) (*(p) = 0)
#endif /* no FD_SET */

Jim Blandy's avatar
Jim Blandy committed
133 134 135 136 137
/* 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))
138

Jim Blandy's avatar
Jim Blandy committed
139 140
/* Nonzero means we must reprint all windows
   because 1) we received an ExposeWindow event
141
   or 2) we received too many ExposeRegion events to record.
Jim Blandy's avatar
Jim Blandy committed
142

143
   This is never needed under X11.  */
Jim Blandy's avatar
Jim Blandy committed
144 145 146 147 148 149 150 151 152 153 154 155
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;

156
/* ButtonPress and ButtonReleased events, when received,
Jim Blandy's avatar
Jim Blandy committed
157 158 159
   are copied into this queue for later processing.  */

struct event_queue x_mouse_queue;
160
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
161 162 163

#if defined (SIGIO) && defined (FIONREAD)
int BLOCK_INPUT_mask;
164
#endif /* ! defined (SIGIO) && defined (FIONREAD) */
Jim Blandy's avatar
Jim Blandy committed
165 166 167 168 169 170 171 172 173 174 175 176 177 178

/* 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
179
char *hostname, *x_id_name;
Jim Blandy's avatar
Jim Blandy committed
180 181 182 183 184

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

Display *x_current_display;

185 186
/* The cursor to use for vertical scroll bars on x_current_display.  */
static Cursor x_vertical_scroll_bar_cursor;
187

188
/* Frame being updated by update_frame.  This is declared in term.c.
189
   This is set by update_begin and looked at by all the
Jim Blandy's avatar
Jim Blandy committed
190
   XT functions.  It is zero while not inside an update.
Jim Blandy's avatar
Jim Blandy committed
191 192
   In that case, the XT functions assume that `selected_frame'
   is the frame to apply to.  */
193
extern struct frame *updating_frame;
Jim Blandy's avatar
Jim Blandy committed
194

Jim Blandy's avatar
Jim Blandy committed
195
/* The frame (if any) which has the X window that has keyboard focus.
196 197 198 199
   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
200
struct frame *x_focus_frame;
Jim Blandy's avatar
Jim Blandy committed
201

202 203 204 205 206 207
/* 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
208 209 210 211
/* 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
212
   minibuffer.  */
Jim Blandy's avatar
Jim Blandy committed
213
static struct frame *x_highlight_frame;
Jim Blandy's avatar
Jim Blandy committed
214

Jim Blandy's avatar
Jim Blandy committed
215
/* From .Xdefaults, the value of "emacs.WarpMouse".  If non-zero,
Jim Blandy's avatar
Jim Blandy committed
216
   mouse is moved to inside of frame when frame is de-iconified.  */
Jim Blandy's avatar
Jim Blandy committed
217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233

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;

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
/* Mouse movement.

   In order to avoid asking for motion events and then throwing most
   of them away or busy-polling the server for mouse positions, we ask
   the server for pointer motion hints.  This means that we get only
   one event per group of mouse movements.  "Groups" are delimited by
   other kinds of events (focus changes and button clicks, for
   example), or by XQueryPointer calls; when one of these happens, we
   get another MotionNotify event the next time the mouse moves.  This
   is at least as efficient as getting motion events when mouse
   tracking is on, and I suspect only negligibly worse when tracking
   is off.

   The silly O'Reilly & Associates Nutshell guides barely document
   pointer motion hints at all (I think you have to infer how they
   work from an example), and the description of XQueryPointer doesn't
   mention that calling it causes you to get another motion hint from
   the server, which is very important.  */

/* Where the mouse was last time we reported a mouse event.  */
static FRAME_PTR last_mouse_frame;
static XRectangle last_mouse_glyph;

/* The scroll bar in which the last X motion event occurred.

   If the last X motion event occurred in a scroll bar, we set this
   so XTmouse_position can know whether to report a scroll bar motion or
   an ordinary motion.

   If the last X motion event didn't occur in a scroll bar, we set this
   to Qnil, to tell XTmouse_position to return an ordinary motion event.  */
static Lisp_Object last_mouse_scroll_bar;

/* Record which buttons are currently pressed. */
unsigned int x_mouse_grabbed;

/* This is a hack.  We would really prefer that XTmouse_position would
   return the time associated with the position it returns, but there
   doesn't seem to be any way to wrest the timestamp from the server
   along with the position query.  So, we just keep track of the time
   of the last movement we received, and return that in hopes that
   it's somewhat accurate.  */
static Time last_mouse_movement_time;

Jim Blandy's avatar
Jim Blandy committed
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295
#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;

296
#else /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315

/* 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;
316
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
317 318 319 320 321 322 323

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

static WINDOWINFO_TYPE windowinfo;

extern int errno;

324
/* A mask of extra modifier bits to put into every keyboard char.  */
325 326
extern int extra_keyboard_modifiers;

Jim Blandy's avatar
Jim Blandy committed
327 328 329 330 331 332 333
extern Display *XOpenDisplay ();
extern Window XCreateWindow ();

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

static void flashback ();
334
static void redraw_previous_char ();
335
static unsigned int x_x_to_emacs_modifiers ();
Jim Blandy's avatar
Jim Blandy committed
336 337 338

#ifndef HAVE_X11
static void dumpqueue ();
339
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
340 341

void dumpborder ();
Jim Blandy's avatar
Jim Blandy committed
342 343
static int XTcursor_to ();
static int XTclear_end_of_line ();
344

Jim Blandy's avatar
Jim Blandy committed
345

346 347 348
/* Starting and ending updates. 

   These hooks are called by update_frame at the beginning and end
Jim Blandy's avatar
Jim Blandy committed
349 350 351
   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
352
   should never be called except during an update, the only exceptions
353
   being XTcursor_to, XTwrite_glyphs and XTreassert_line_highlight.  */
Jim Blandy's avatar
Jim Blandy committed
354 355 356 357

extern int mouse_track_top, mouse_track_left, mouse_track_width;

static
Jim Blandy's avatar
Jim Blandy committed
358 359
XTupdate_begin (f)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
360 361 362
{	
  int mask;

Jim Blandy's avatar
Jim Blandy committed
363
  if (f == 0)
Jim Blandy's avatar
Jim Blandy committed
364 365
    abort ();

Jim Blandy's avatar
Jim Blandy committed
366
  flexlines = f->height;
Jim Blandy's avatar
Jim Blandy committed
367 368 369 370 371
  highlight = 0;

  BLOCK_INPUT;
#ifndef HAVE_X11
  dumpqueue ();
372
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
373 374 375
  UNBLOCK_INPUT;
}

376
#ifndef HAVE_X11
Jim Blandy's avatar
Jim Blandy committed
377
static void x_do_pending_expose ();
378
#endif
Jim Blandy's avatar
Jim Blandy committed
379 380

static
Jim Blandy's avatar
Jim Blandy committed
381 382
XTupdate_end (f)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
383 384 385 386 387 388 389
{	
  int mask;

  BLOCK_INPUT;
#ifndef HAVE_X11
  dumpqueue ();
  x_do_pending_expose ();
390
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
391

Jim Blandy's avatar
Jim Blandy committed
392
  x_display_cursor (f, 1);
Jim Blandy's avatar
Jim Blandy committed
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416

  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
417
  XTclear_end_of_line (updating_frame->width);
Jim Blandy's avatar
Jim Blandy committed
418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
}

/* 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
436
/*  XTclear_frame ();  */
Jim Blandy's avatar
Jim Blandy committed
437 438
}

439 440
/* Set the nominal cursor position of the frame.
   This is where display update commands will take effect.
Jim Blandy's avatar
Jim Blandy committed
441 442
   This does not affect the place where the cursor-box is displayed.  */

Jim Blandy's avatar
Jim Blandy committed
443
static int
Jim Blandy's avatar
Jim Blandy committed
444 445 446 447 448 449 450 451 452
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
453
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
454 455
    {
      BLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
456
      x_display_cursor (selected_frame, 1);
Jim Blandy's avatar
Jim Blandy committed
457 458 459 460 461 462 463 464 465
      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.

466
   FONT is the default font to use (for glyphs whose font-code is 0).
Jim Blandy's avatar
Jim Blandy committed
467

468 469 470
   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
471
   glyph is a valid index into FRAME_COMPUTED_FACES (f), and the one
472 473
   to which we can actually apply intern_face.
   Call this function with input blocked.  */
Jim Blandy's avatar
Jim Blandy committed
474

475 476
#if 1
/* This is the multi-face code.  */
Jim Blandy's avatar
Jim Blandy committed
477 478

static void
479
dumpglyphs (f, left, top, gp, n, hl)
Jim Blandy's avatar
Jim Blandy committed
480
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
481 482 483 484 485
     int left, top;
     register GLYPH *gp; /* Points to first GLYPH. */
     register int n;  /* Number of glyphs to display. */
     int hl;
{
486 487
  /* Holds characters to be displayed. */
  char *buf = (char *) alloca (f->width * sizeof (*buf));
Jim Blandy's avatar
Jim Blandy committed
488 489 490
  register char *cp;		/* Steps through buf[]. */
  register int tlen = GLYPH_TABLE_LENGTH;
  register Lisp_Object *tbase = GLYPH_TABLE_BASE;
491
  Window window = FRAME_X_WINDOW (f);
Jim Blandy's avatar
Jim Blandy committed
492

493
  while (n > 0)
Jim Blandy's avatar
Jim Blandy committed
494 495 496 497 498
    {
      /* Get the face-code of the next GLYPH.  */
      int cf, len;
      int g = *gp;

499
      GLYPH_FOLLOW_ALIASES (tbase, tlen, g);
500
      cf = FAST_GLYPH_FACE (g);
Jim Blandy's avatar
Jim Blandy committed
501 502 503 504 505 506 507

      /* Find the run of consecutive glyphs with the same face-code.
	 Extract their character codes into BUF.  */
      cp = buf;
      while (n > 0)
	{
	  g = *gp;
508
	  GLYPH_FOLLOW_ALIASES (tbase, tlen, g);
509
	  if (FAST_GLYPH_FACE (g) != cf)
Jim Blandy's avatar
Jim Blandy committed
510 511
	    break;

512
	  *cp++ = FAST_GLYPH_CHAR (g);
Jim Blandy's avatar
Jim Blandy committed
513 514 515 516 517 518 519 520 521
	  --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.  */
522 523 524 525
      {
	struct face *face = FRAME_DEFAULT_FACE (f);
	FONT_TYPE *font = FACE_FONT (face);
	GC gc = FACE_GC (face);
526 527
	int defaulted = 1;
	int gc_temporary = 0;
528

529 530
	/* First look at the face of the text itself.  */
	if (cf != 0)
531
	  {
532 533
	    /* It's possible for the display table to specify
	       a face code that is out of range.  Use 0 in that case.  */
534 535
	    if (cf < 0 || cf >= FRAME_N_COMPUTED_FACES (f)
		|| FRAME_COMPUTED_FACES (f) [cf] == 0)
536
	      cf = 0;
537 538 539 540

	    if (cf == 1)
	      face = FRAME_MODE_LINE_FACE (f);
	    else
541
	      face = intern_face (f, FRAME_COMPUTED_FACES (f) [cf]);
542 543
	    font = FACE_FONT (face);
	    gc = FACE_GC (face);
544
	    defaulted = 0;
545
	  }
546 547

	/* Then comes the distinction between modeline and normal text.  */
548 549 550 551 552 553 554
	else if (hl == 0)
	  ;
	else if (hl == 1)
	  {
	    face = FRAME_MODE_LINE_FACE (f);
	    font = FACE_FONT (face);
	    gc   = FACE_GC   (face);
555 556 557 558 559 560
	    defaulted = 0;
	  }

#define FACE_DEFAULT (~0)

	/* Now override that if the cursor's on this character.  */
561
	if (hl == 2)
562
	  {
563 564 565 566 567 568 569 570 571 572 573 574 575
	    if (defaulted
		|| !face->font
		|| (int) face->font == FACE_DEFAULT)
	      {
		gc = f->display.x->cursor_gc;
	      }
	    /* Cursor on non-default face: must merge.  */
	    else
	      {
		XGCValues xgcv;
		unsigned long mask;

		xgcv.background = f->display.x->cursor_pixel;
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
		if (face == FRAME_DEFAULT_FACE (f))
		  xgcv.foreground = f->display.x->cursor_foreground_pixel;
		else
		  xgcv.foreground = face->foreground;
		/* If the glyph would be invisible,
		   try a different foreground.  */
		if (xgcv.foreground == xgcv.background)
		  xgcv.foreground = face->background;
		if (xgcv.foreground == xgcv.background)
		  xgcv.foreground = f->display.x->cursor_foreground_pixel;
		if (xgcv.foreground == xgcv.background)
		  xgcv.foreground = face->foreground;
		/* Make sure the cursor is distinct from text in this face.  */
		if (xgcv.background == face->background
		    && xgcv.foreground == face->foreground)
		  {
		    xgcv.background = face->foreground;
		    xgcv.foreground = face->background;
		  }
595 596 597 598 599
		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);
600
#if 0
601 602
		if (face->stipple && face->stipple != FACE_DEFAULT)
		  XSetStipple (x_current_display, gc, face->stipple);
603
#endif
604 605
		gc_temporary = 1;
	      }
606 607
	  }

608 609 610
	if ((int) font == FACE_DEFAULT)
	  font = f->display.x->font;

611 612 613
	XDrawImageString (x_current_display, window, gc,
			  left, top + FONT_BASE (font), buf, len);

614 615 616
	if (gc_temporary)
	  XFreeGC (x_current_display, gc);

617 618 619
	/* 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
620
	{
621
	  int underline_position = 1;
622

623 624
	  if (font->descent <= underline_position)
	    underline_position = font->descent - 1;
625 626 627 628 629 630 631 632

	  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
633
	}
634 635 636

	left += len * FONT_WIDTH (font);
      }
Jim Blandy's avatar
Jim Blandy committed
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
#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
671

672 673
/* Output some text at the nominal frame cursor position.
   Advance the cursor over the text.
Jim Blandy's avatar
Jim Blandy committed
674 675 676 677 678 679 680 681 682 683 684 685
   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
686
  struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
687 688 689

  BLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
690 691
  f = updating_frame;
  if (f == 0)
Jim Blandy's avatar
Jim Blandy committed
692
    {
Jim Blandy's avatar
Jim Blandy committed
693
      f = selected_frame;
Jim Blandy's avatar
Jim Blandy committed
694
      /* If not within an update,
Jim Blandy's avatar
Jim Blandy committed
695 696 697
	 output at the frame's visible cursor.  */
      curs_x = f->cursor_x;
      curs_y = f->cursor_y;
Jim Blandy's avatar
Jim Blandy committed
698 699
    }

Jim Blandy's avatar
Jim Blandy committed
700
  dumpglyphs (f,
701 702
	      CHAR_TO_PIXEL_COL (f, curs_x),
	      CHAR_TO_PIXEL_ROW (f, curs_y),
703
	      start, len, highlight);
Jim Blandy's avatar
Jim Blandy committed
704 705

  /* If we drew on top of the cursor, note that it is turned off.  */
Jim Blandy's avatar
Jim Blandy committed
706 707 708 709
  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
710
  
Jim Blandy's avatar
Jim Blandy committed
711
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
712
    {
Jim Blandy's avatar
Jim Blandy committed
713 714 715
      f->cursor_x += len;
      x_display_cursor (f, 1);
      f->cursor_x -= len;
Jim Blandy's avatar
Jim Blandy committed
716 717 718 719 720 721 722
    }
  else
    curs_x += len;

  UNBLOCK_INPUT;
}

723 724
/* 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
725 726 727
   to column FIRST_UNUSED (exclusive).  The idea is that everything
   from FIRST_UNUSED onward is already erased.  */
  
Jim Blandy's avatar
Jim Blandy committed
728
static int
Jim Blandy's avatar
Jim Blandy committed
729 730 731
XTclear_end_of_line (first_unused)
     register int first_unused;
{
Jim Blandy's avatar
Jim Blandy committed
732
  struct frame *f = updating_frame;
Jim Blandy's avatar
Jim Blandy committed
733 734
  int mask;

Jim Blandy's avatar
Jim Blandy committed
735
  if (f == 0)
Jim Blandy's avatar
Jim Blandy committed
736 737
    abort ();

Jim Blandy's avatar
Jim Blandy committed
738
  if (curs_y < 0 || curs_y >= f->height)
Jim Blandy's avatar
Jim Blandy committed
739 740 741 742
    return;
  if (first_unused <= 0)
    return;

Jim Blandy's avatar
Jim Blandy committed
743 744
  if (first_unused >= f->width)
    first_unused = f->width;
Jim Blandy's avatar
Jim Blandy committed
745 746 747

  BLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
748
  /* Notice if the cursor will be cleared by this operation.  */
Jim Blandy's avatar
Jim Blandy committed
749 750 751 752
  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
753 754

#ifdef HAVE_X11
755
  XClearArea (x_current_display, FRAME_X_WINDOW (f),
756 757
	      CHAR_TO_PIXEL_COL (f, curs_x),
	      CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
758 759
	      FONT_WIDTH (f->display.x->font) * (first_unused - curs_x),
	      FONT_HEIGHT (f->display.x->font), False);
760 761 762
#if 0
  redraw_previous_char (f, curs_x, curs_y);
#endif
763 764
#else /* ! defined (HAVE_X11) */
  XPixSet (FRAME_X_WINDOW (f),
765 766
	   CHAR_TO_PIXEL_COL (f, curs_x),
	   CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
767 768 769
	   FONT_WIDTH (f->display.x->font) * (first_unused - curs_x),
	   FONT_HEIGHT (f->display.x->font),
	   f->display.x->background_pixel);	
770
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
771 772 773 774

  UNBLOCK_INPUT;
}

775 776 777
/* Erase the character (if any) at the position just before X, Y in frame F,
   then redraw it and the character before it.
   This is necessary when we erase starting at X,
778 779
   in case the character after X overlaps into the one before X.
   Call this function with input blocked.  */
780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807

static void
redraw_previous_char (f, x, y)
     FRAME_PTR f;
     int x, y;
{
  /* Erase the character before the new ones, in case
     what was here before overlaps it.
     Reoutput that character, and the previous character
     (in case the previous character overlaps it).  */
  if (x > 0)
    {
      int start_x = x - 2;
      if (start_x < 0)
	start_x = 0;
      XClearArea (x_current_display, FRAME_X_WINDOW (f),
		  CHAR_TO_PIXEL_COL (f, x - 1),
		  CHAR_TO_PIXEL_ROW (f, y),
		  FONT_WIDTH (f->display.x->font),
		  FONT_HEIGHT (f->display.x->font), False);

      dumpglyphs (f, CHAR_TO_PIXEL_COL (f, start_x),
		  CHAR_TO_PIXEL_ROW (f, y),
		  &FRAME_CURRENT_GLYPHS (f)->glyphs[y][start_x],
		  x - start_x, highlight);
    }
}

Jim Blandy's avatar
Jim Blandy committed
808
static
Jim Blandy's avatar
Jim Blandy committed
809
XTclear_frame ()
Jim Blandy's avatar
Jim Blandy committed
810 811
{
  int mask;
Jim Blandy's avatar
Jim Blandy committed
812
  struct frame *f = updating_frame;
Jim Blandy's avatar
Jim Blandy committed
813

Jim Blandy's avatar
Jim Blandy committed
814 815
  if (f == 0)
    f = selected_frame;
Jim Blandy's avatar
Jim Blandy committed
816

Jim Blandy's avatar
Jim Blandy committed
817
  f->phys_cursor_x = -1;	/* Cursor not visible.  */
Jim Blandy's avatar
Jim Blandy committed
818 819 820 821
  curs_x = 0;			/* Nominal cursor position is top left.  */
  curs_y = 0;
  
  BLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
822

823
  XClear (FRAME_X_WINDOW (f));
Jim Blandy's avatar
Jim Blandy committed
824

825
  /* We have to clear the scroll bars, too.  If we have changed
Jim Blandy's avatar
Jim Blandy committed
826
     colors or something like that, then they should be notified.  */
827
  x_scroll_bar_clear (f);
Jim Blandy's avatar
Jim Blandy committed
828

Jim Blandy's avatar
Jim Blandy committed
829
#ifndef HAVE_X11
Jim Blandy's avatar
Jim Blandy committed
830
  dumpborder (f, 0);
831
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
832

Jim Blandy's avatar
Jim Blandy committed
833 834 835 836
  XFlushQueue ();
  UNBLOCK_INPUT;
}

Jim Blandy's avatar
Jim Blandy committed
837 838 839
/* 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
840
   it's available.  If it isn't, we just won't do visual bells.  */
Jim Blandy's avatar
Jim Blandy committed
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873
#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
874

Jim Blandy's avatar
Jim Blandy committed
875 876
XTflash (f)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
877
{
Jim Blandy's avatar
Jim Blandy committed
878
  BLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
879

Jim Blandy's avatar
Jim Blandy committed
880 881
  {
    GC gc;
Jim Blandy's avatar
Jim Blandy committed
882

Jim Blandy's avatar
Jim Blandy committed
883 884 885 886
    /* 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
887

Jim Blandy's avatar
Jim Blandy committed
888 889 890 891 892 893 894
      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
895

Jim Blandy's avatar
Jim Blandy committed
896 897 898
    {
      int width  = PIXEL_WIDTH  (f);
      int height = PIXEL_HEIGHT (f);
Jim Blandy's avatar
Jim Blandy committed
899

Jim Blandy's avatar
Jim Blandy committed
900 901 902
      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
903

Jim Blandy's avatar
Jim Blandy committed
904 905
      {
	struct timeval wakeup, now;
Jim Blandy's avatar
Jim Blandy committed
906

907
	EMACS_GET_TIME (wakeup);
Jim Blandy's avatar
Jim Blandy committed
908

Jim Blandy's avatar
Jim Blandy committed
909 910 911 912 913 914 915 916 917 918
	/* 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;

919
	    EMACS_GET_TIME (timeout);
Jim Blandy's avatar
Jim Blandy committed
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934

	    /* 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
935
    }
Jim Blandy's avatar
Jim Blandy committed
936 937 938
  }

  UNBLOCK_INPUT;
Jim Blandy's avatar
Jim Blandy committed
939 940
}

Jim Blandy's avatar
Jim Blandy committed
941 942 943
#endif


Jim Blandy's avatar
Jim Blandy committed
944 945 946
/* Make audible bell.  */

#ifdef HAVE_X11
947
#define XRINGBELL XBell (x_current_display, 0)
948
#else /* ! defined (HAVE_X11) */
949
#define XRINGBELL XFeep (0);
950
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
951 952 953

XTring_bell ()
{
954 955 956
  if (x_current_display == 0)
    return;

Jim Blandy's avatar
Jim Blandy committed
957
#if defined (HAVE_TIMEVAL) && defined (HAVE_SELECT)
Jim Blandy's avatar
Jim Blandy committed
958
  if (visible_bell)
Jim Blandy's avatar
Jim Blandy committed
959
    XTflash (selected_frame);
Jim Blandy's avatar
Jim Blandy committed
960
  else
Jim Blandy's avatar
Jim Blandy committed
961
#endif
Jim Blandy's avatar
Jim Blandy committed
962 963 964 965 966 967 968 969
    {
      BLOCK_INPUT;
      XRINGBELL;
      XFlushQueue ();
      UNBLOCK_INPUT;
    }
}

970 971 972
/* 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
973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997

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
998
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
999 1000
    abort ();

Jim Blandy's avatar
Jim Blandy committed
1001 1002
  if ((n <= 0) || (n > updating_frame->height))
    flexlines = updating_frame->height;
Jim Blandy's avatar
Jim Blandy committed
1003 1004 1005 1006
  else
    flexlines = n;
}

1007 1008
/* Perform an insert-lines operation.
   Insert N lines at a vertical position curs_y.  */
Jim Blandy's avatar
Jim Blandy committed
1009 1010 1011 1012 1013 1014 1015

static void
stufflines (n)
     register int n;
{
  register int topregion, bottomregion;
  register int length, newtop, mask;
Jim Blandy's avatar
Jim Blandy committed
1016 1017
  register struct frame *f = updating_frame;
  int intborder = f->display.x->internal_border_width;
Jim Blandy's avatar
Jim Blandy committed
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028

  if (curs_y >= flexlines)
    return;

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

#ifndef HAVE_X11
  dumpqueue ();
1029
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
1030 1031 1032 1033

  if ((length > 0) && (newtop <= flexlines))
    {
#ifdef HAVE_X11
1034 1035
      XCopyArea (x_current_display, FRAME_X_WINDOW (f),
		 FRAME_X_WINDOW (f), f->display.x->normal_gc,
1036
		 intborder, CHAR_TO_PIXEL_ROW (f, topregion),
Jim Blandy's avatar
Jim Blandy committed
1037 1038
		 f->width * FONT_WIDTH (f->display.x->font),
		 length * FONT_HEIGHT (f->display.x->font), intborder,
1039
		 CHAR_TO_PIXEL_ROW (f, newtop));
1040 1041
#else /* ! defined (HAVE_X11) */
      XMoveArea (FRAME_X_WINDOW (f),
1042 1043
		 intborder, CHAR_TO_PIXEL_ROW (f, topregion),
		 intborder, CHAR_TO_PIXEL_ROW (f, newtop),
Jim Blandy's avatar
Jim Blandy committed
1044 1045
		 f->width * FONT_WIDTH (f->display.x->font),
		 length * FONT_HEIGHT (f->display.x->font));
Jim Blandy's avatar
Jim Blandy committed
1046 1047 1048 1049 1050
      /* 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 ();
1051
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
1052 1053 1054 1055 1056 1057 1058
    }

  newtop = min (newtop, (flexlines - 1));
  length = newtop - topregion;
  if (length > 0)
    {
#ifdef HAVE_X11
1059
      XClearArea (x_current_display, FRAME_X_WINDOW (f), intborder, 
1060
		  CHAR_TO_PIXEL_ROW (f, topregion),
Jim Blandy's avatar
Jim Blandy committed
1061 1062
		  f->width * FONT_WIDTH (f->display.x->font),
		  n * FONT_HEIGHT (f->display.x->font), False);
1063 1064
#else /* ! defined (HAVE_X11) */
      XPixSet (FRAME_X_WINDOW (f),
Jim Blandy's avatar
Jim Blandy committed
1065
	       intborder,
1066
	       CHAR_TO_PIXEL_ROW (f, topregion),
Jim Blandy's avatar
Jim Blandy committed
1067 1068 1069
	       f->width * FONT_WIDTH (f->display.x->font),
	       n * FONT_HEIGHT (f->display.x->font),
	       f->display.x->background_pixel);
1070
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
    }
}

/* 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
1082 1083
  register struct frame *f = updating_frame;
  int intborder = f->display.x->internal_border_width;
Jim Blandy's avatar
Jim Blandy committed
1084 1085 1086 1087 1088 1089

  if (curs_y >= flexlines)
    return;

#ifndef HAVE_X11
  dumpqueue ();
1090
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
1091 1092 1093 1094 1095 1096

  if ((curs_y + n) >= flexlines)
    {
      if (flexlines >= (curs_y + 1))
	{
#ifdef HAVE_X11
1097
	  XClearArea (x_current_display, FRAME_X_WINDOW (f), intborder,
1098
		      CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
1099 1100
		      f->width * FONT_WIDTH (f->display.x->font),
		      (flexlines - curs_y) * FONT_HEIGHT (f->display.x->font), False);
1101 1102
#else /* ! defined (HAVE_X11) */
	  XPixSet (FRAME_X_WINDOW (f),
1103
		   intborder, CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
1104 1105 1106
		   f->width * FONT_WIDTH (f->display.x->font),
		   (flexlines - curs_y) * FONT_HEIGHT (f->display.x->font),
		   f->display.x->background_pixel);
1107
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
1108 1109 1110 1111 1112
	}
    }
  else
    {
#ifdef HAVE_X11
1113 1114
      XCopyArea (x_current_display, FRAME_X_WINDOW (f),
		 FRAME_X_WINDOW (f), f->display.x->normal_gc,
Jim Blandy's avatar
Jim Blandy committed
1115
		 intborder,
1116
		 CHAR_TO_PIXEL_ROW (f, curs_y + n),
Jim Blandy's avatar
Jim Blandy committed
1117 1118
		 f->width * FONT_WIDTH (f->display.x->font),
		 (flexlines - (curs_y + n)) * FONT_HEIGHT (f->display.x->font),
1119
		 intborder, CHAR_TO_PIXEL_ROW (f, curs_y));
1120
      XClearArea (x_current_display, FRAME_X_WINDOW (f),
Jim Blandy's avatar
Jim Blandy committed
1121
		  intborder,
1122
		  CHAR_TO_PIXEL_ROW (f, flexlines - n),
Jim Blandy's avatar
Jim Blandy committed
1123 1124
		  f->width * FONT_WIDTH (f->display.x->font),
		  n * FONT_HEIGHT (f->display.x->font), False);
1125 1126
#else /* ! defined (HAVE_X11) */
      XMoveArea (FRAME_X_WINDOW (f),
Jim Blandy's avatar
Jim Blandy committed
1127
		 intborder,
1128 1129
		 CHAR_TO_PIXEL_ROW (f, curs_y + n),
		 intborder, CHAR_TO_PIXEL_ROW (f, curs_y),
Jim Blandy's avatar
Jim Blandy committed
1130 1131
		 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
1132 1133 1134 1135 1136
      /* 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 ();
1137
      XPixSet (FRAME_X_WINDOW (f), intborder,
1138
	       CHAR_TO_PIXEL_ROW (f, flexlines - n),
Jim Blandy's avatar
Jim Blandy committed
1139 1140
	       f->width * FONT_WIDTH (f->display.x->font),
	       n * FONT_HEIGHT (f->display.x->font), f->display.x->background_pixel);
1141
#endif /* ! defined (HAVE_X11) */
Jim Blandy's avatar
Jim Blandy committed
1142 1143 1144 1145 1146 1147 1148 1149 1150
    }
}

/* 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
1151
  if (updating_frame == 0)
Jim Blandy's avatar
Jim Blandy committed
1152 1153
    abort ();

Jim Blandy's avatar
Jim Blandy committed
1154
  /* Hide the cursor.  */
Jim Blandy's avatar
Jim Blandy committed
1155
  x_display_cursor (updating_frame, 0);
Jim Blandy's avatar
Jim Blandy committed
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167

  XTcursor_to (vpos, 0);

  BLOCK_INPUT;
  if (n >= 0)
    stufflines (n);
  else
    scraplines (-n);
  XFlushQueue ();
  UNBLOCK_INPUT;
}

1168
/* Support routines for exposure events.  */
Jim Blandy's avatar
Jim Blandy committed
1169 1170
static void clear_cursor ();

Jim Blandy's avatar
Jim Blandy committed
1171 1172
/* 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
1173
   TOP and LEFT are the position of the upper left corner of the rectangle.
1174 1175
   ROWS and COLS are the size of the rectangle.
   Call this function with input blocked.  */
Jim Blandy's avatar
Jim Blandy committed
1176 1177

static void
Jim Blandy's avatar
Jim Blandy committed
1178 1179
dumprectangle (f, left, top, cols, rows)
     struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
1180 1181
     register int left, top, cols, rows;
{
Jim Blandy's avatar
Jim Blandy committed
1182
  register struct frame_glyphs *active_frame = FRAME_CURRENT_GLYPHS (f);
Jim Blandy's avatar
Jim Blandy committed
1183 1184 1185 1186
  int cursor_cleared = 0;
  int bottom, right;
  register int y;

Jim Blandy's avatar
Jim Blandy committed
1187
  if (FRAME_GARBAGED_P (f))
Jim Blandy's avatar
Jim Blandy committed
1188 1189 1190 1191 1192 1193 1194
    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. */
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
  {
    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);
  }
1205
#endif /* HAVE_X11		Window manger does this for X11. */
Jim Blandy's avatar
Jim Blandy committed
1206 1207 1208
  
  /* Convert rectangle edges in pixels to edges in chars.
     Round down for left and top, up for right and bottom.  */
1209 1210
  top  = PIXEL_TO_CHAR_ROW (f, top);
  left = PIXEL_TO_CHAR_COL (f, left);
Jim Blandy's avatar
Jim Blandy committed
1211 1212
  bottom += (FONT_HEIGHT (f->display.x->font) - 1);
  right += (FONT_WIDTH (f->display.x->font) - 1);
1213 1214
  bottom = PIXEL_TO_CHAR_ROW (f, bottom);
  right = PIXEL_TO_CHAR_COL (f, right);
Jim Blandy's avatar
Jim Blandy committed
1215 1216 1217 1218 1219 1220

  /* 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
1221 1222 1223 1224
  if (right > f->width)
    right = f->width;
  if (bottom > f->height)
    bottom = f->height;
Jim Blandy's avatar
Jim Blandy committed
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235

  /* 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
1236 1237
  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
1238
    {
Jim Blandy's avatar
Jim Blandy committed
1239
      clear_cursor (f);
Jim Blandy's avatar
Jim Blandy committed
1240 1241 1242 1243 1244 1245 1246
      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
1247
      GLYPH *line = &active_frame->glyphs[y][left];
Jim Blandy's avatar
Jim Blandy committed
1248

Jim Blandy's avatar
Jim Blandy committed
1249
      if (! active_frame->enable[y] || left > active_frame->used[y])
Jim Blandy's avatar
Jim Blandy committed
1250 1251
	continue;

Jim Blandy's avatar
Jim Blandy committed
1252
      dumpglyphs (f,
1253 1254 1255
		  CHAR_TO_PIXEL_COL (f, left),
		  CHAR_TO_PIXEL_ROW (f, y),
		  line, min (cols, active_frame->used[y] - left),
1256
		  active_frame->highlight[y]);
Jim Blandy's avatar
Jim Blandy committed
1257 1258 1259 1260 1261
    }

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

  if (cursor_cleared)
Jim Blandy's avatar
Jim Blandy committed
1262
    x_display_cursor (f, 1);
Jim Blandy's avatar
Jim Blandy committed
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
}

#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
1276 1277 1278
      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
1279
      else
Jim Blandy's avatar
Jim Blandy committed
1280
	dumprectangle (f, r.x, r.y, r.width, r.height);
Jim Blandy's avatar
Jim Blandy committed
1281 1282 1283
    }
  XFlushQueue ();
}
1284
#endif /* HAVE_X11 */
Jim Blandy's avatar
Jim Blandy committed
1285

1286
/* Process all expose events that are pending, for X10.
Jim Blandy's avatar
Jim Blandy committed
1287 1288
   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
1289

1290