w32term.c 285 KB
Newer Older
1
/* Implementation of GUI terminal on the Microsoft W32 API.
2
   Copyright (C) 1989, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
Geoff Voelker's avatar
Geoff Voelker committed
3 4 5 6 7 8 9 10 11 12 13 14 15 16

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
the Free Software Foundation; either version 2, or (at your option)
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
Karl Heuer's avatar
Karl Heuer committed
17 18 19
along with GNU Emacs; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Geoff Voelker's avatar
Geoff Voelker committed
20 21

#include <config.h>
22
#include <signal.h>
Geoff Voelker's avatar
Geoff Voelker committed
23
#include <stdio.h>
24
#include <stdlib.h>
Geoff Voelker's avatar
Geoff Voelker committed
25
#include "lisp.h"
Geoff Voelker's avatar
Geoff Voelker committed
26
#include "charset.h"
27
#include "fontset.h"
Geoff Voelker's avatar
Geoff Voelker committed
28 29
#include "blockinput.h"

Andrew Innes's avatar
Andrew Innes committed
30
#include "w32heap.h"
31
#include "w32term.h"
32
#include "w32bdf.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
33
#include <shellapi.h>
Geoff Voelker's avatar
Geoff Voelker committed
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

#include "systty.h"
#include "systime.h"

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

#include "frame.h"
#include "dispextern.h"
#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"
#include "gnu.h"
#include "disptab.h"
#include "buffer.h"
#include "window.h"
#include "keyboard.h"
#include "intervals.h"
54
#include "composite.h"
55
#include "coding.h"
Geoff Voelker's avatar
Geoff Voelker committed
56

Karl Heuer's avatar
Karl Heuer committed
57 58 59 60 61
#undef min
#undef max
#define min(x, y) (((x) < (y)) ? (x) : (y))
#define max(x, y) (((x) > (y)) ? (x) : (y))

62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
#define abs(x)	((x) < 0 ? -(x) : (x))

#define BETWEEN(X, LOWER, UPPER)  ((X) >= (LOWER) && (X) < (UPPER))


/* Bitmaps for truncated lines.  */

enum bitmap_type
{
  NO_BITMAP,
  LEFT_TRUNCATION_BITMAP,
  RIGHT_TRUNCATION_BITMAP,
  OVERLAY_ARROW_BITMAP,
  CONTINUED_LINE_BITMAP,
  CONTINUATION_LINE_BITMAP,
  ZV_LINE_BITMAP
};

/* Bitmaps are all unsigned short, as Windows requires bitmap data to
   be Word aligned.  For some reason they are horizontally reflected
   compared to how they appear on X, so changes in xterm.c should be
   reflected here.  */

/* Bitmap drawn to indicate lines not displaying text if
   `indicate-empty-lines' is non-nil.  */

#define zv_width 8
#define zv_height 8
static unsigned short zv_bits[] = {
   0x00, 0x00, 0x78, 0x78, 0x78, 0x78, 0x00, 0x00};

/* An arrow like this: `<-'.  */

#define left_width 8
#define left_height 8
static unsigned short left_bits[] = {
   0x18, 0x30, 0x60, 0xfc, 0xfc, 0x60, 0x30, 0x18};

/* Right truncation arrow bitmap `->'.  */

#define right_width 8
#define right_height 8
static unsigned short right_bits[] = {
   0x18, 0x0c, 0x06, 0x3f, 0x3f, 0x06, 0x0c, 0x18};

/* Marker for continued lines.  */

#define continued_width 8
#define continued_height 8
static unsigned short continued_bits[] = {
   0x3c, 0x3e, 0x03, 0x27, 0x3f, 0x3e, 0x3c, 0x3e};

/* Marker for continuation lines.  */

#define continuation_width 8
#define continuation_height 8
static unsigned short continuation_bits[] = {
   0x3c, 0x7c, 0xc0, 0xe4, 0xfc, 0x7c, 0x3c, 0x7c};

/* Overlay arrow bitmap.  */

#if 0
/* A bomb.  */
#define ov_width 8
#define ov_height 8
static unsigned short ov_bits[] = {
   0x0c, 0x10, 0x3c, 0x7e, 0x5e, 0x5e, 0x46, 0x3c};
#else
/* A triangular arrow.  */
#define ov_width 8
#define ov_height 8
static unsigned short ov_bits[] = {
   0xc0, 0xf0, 0xf8, 0xfc, 0xfc, 0xf8, 0xf0, 0xc0};

#endif

extern Lisp_Object Qhelp_echo;


/* Non-zero means Emacs uses toolkit scroll bars.  */

int x_toolkit_scroll_bars_p;

/* If a string, w32_read_socket generates an event to display that string.
   (The display is done in read_char.)  */
   
static Lisp_Object help_echo;

/* Temporary variable for w32_read_socket.  */

static Lisp_Object previous_help_echo;

/* Non-zero means that a HELP_EVENT has been generated since Emacs
   start.  */

static int any_help_event_p;

/* Non-zero means draw block and hollow cursor as wide as the glyph
   under it.  For example, if a block cursor is over a tab, it will be
   drawn as wide as that tab on the display.  */

int x_stretch_cursor_p;

165 166
#define CP_DEFAULT 1004

Geoff Voelker's avatar
Geoff Voelker committed
167 168
extern unsigned int msh_mousewheel;

Geoff Voelker's avatar
Geoff Voelker committed
169 170
extern void free_frame_menubar ();

Geoff Voelker's avatar
Geoff Voelker committed
171 172
extern Lisp_Object Vwindow_system;

Geoff Voelker's avatar
Geoff Voelker committed
173 174 175 176
#define x_any_window_to_frame x_window_to_frame
#define x_top_window_to_frame x_window_to_frame


177 178
/* This is display since w32 does not support multiple ones.  */
struct w32_display_info one_w32_display_info;
Geoff Voelker's avatar
Geoff Voelker committed
179 180

/* This is a list of cons cells, each of the form (NAME . FONT-LIST-CACHE),
181
   one for each element of w32_display_list and in the same order.
Geoff Voelker's avatar
Geoff Voelker committed
182 183
   NAME is the name of the frame.
   FONT-LIST-CACHE records previous values returned by x-list-fonts.  */
184
Lisp_Object w32_display_name_list;
Geoff Voelker's avatar
Geoff Voelker committed
185 186 187

/* Frame being updated by update_frame.  This is declared in term.c.
   This is set by update_begin and looked at by all the
188
   w32 functions.  It is zero while not inside an update.
189
   In that case, the w32 functions assume that `SELECTED_FRAME ()'
Geoff Voelker's avatar
Geoff Voelker committed
190 191 192 193 194 195 196
   is the frame to apply to.  */
extern struct frame *updating_frame;

/* This is a frame waiting to be autoraised, within w32_read_socket.  */
struct frame *pending_autoraise_frame;

/* Nominal cursor position -- where to draw output.
197 198
   HPOS and VPOS are window relative glyph matrix coordinates.
   X and Y are window relative pixel coordinates.  */
Geoff Voelker's avatar
Geoff Voelker committed
199

200
struct cursor_pos output_cursor;
Geoff Voelker's avatar
Geoff Voelker committed
201

202
/* Flag to enable Unicode output in case users wish to use programs
203 204
   like Twinbridge on '95 rather than installed system level support
   for Far East languages.  */
205
int w32_enable_unicode_output;
206

207 208
DWORD dwWindowsThreadId = 0;
HANDLE hWindowsThread = NULL;
Geoff Voelker's avatar
Geoff Voelker committed
209 210 211
DWORD dwMainThreadId = 0;
HANDLE hMainThread = NULL;

212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243
#ifndef SIF_ALL
/* These definitions are new with Windows 95. */
#define SIF_RANGE           0x0001
#define SIF_PAGE            0x0002
#define SIF_POS             0x0004
#define SIF_DISABLENOSCROLL 0x0008
#define SIF_TRACKPOS        0x0010
#define SIF_ALL             (SIF_RANGE | SIF_PAGE | SIF_POS | SIF_TRACKPOS)

typedef struct tagSCROLLINFO
{
    UINT    cbSize;
    UINT    fMask;
    int     nMin;
    int     nMax;
    UINT    nPage;
    int     nPos;
    int     nTrackPos;
}   SCROLLINFO, FAR *LPSCROLLINFO;
typedef SCROLLINFO CONST FAR *LPCSCROLLINFO;
#endif /* SIF_ALL */

/* Dynamic linking to new proportional scroll bar functions. */
int (PASCAL *pfnSetScrollInfo) (HWND hwnd, int fnBar, LPSCROLLINFO lpsi, BOOL fRedraw);
BOOL (PASCAL *pfnGetScrollInfo) (HWND hwnd, int fnBar, LPSCROLLINFO lpsi);

int vertical_scroll_bar_min_handle;
int vertical_scroll_bar_top_border;
int vertical_scroll_bar_bottom_border;

int last_scroll_bar_drag_pos;

Geoff Voelker's avatar
Geoff Voelker committed
244 245 246
/* Mouse movement. */

/* Where the mouse was last time we reported a mouse event.  */
247
FRAME_PTR last_mouse_frame;
Geoff Voelker's avatar
Geoff Voelker committed
248
static RECT last_mouse_glyph;
249
static Lisp_Object last_mouse_press_frame;
Geoff Voelker's avatar
Geoff Voelker committed
250

251
Lisp_Object Vw32_num_mouse_buttons;
Geoff Voelker's avatar
Geoff Voelker committed
252

253
Lisp_Object Vw32_swap_mouse_buttons;
Geoff Voelker's avatar
Geoff Voelker committed
254

255 256 257 258 259 260
/* Control whether x_raise_frame also sets input focus.  */
Lisp_Object Vw32_grab_focus_on_raise;

/* Control whether Caps Lock affects non-ascii characters.  */
Lisp_Object Vw32_capslock_is_shiftlock;

261 262 263
/* Control whether right-alt and left-ctrl should be recognized as AltGr.  */
Lisp_Object Vw32_recognize_altgr;

Geoff Voelker's avatar
Geoff Voelker committed
264 265 266
/* The scroll bar in which the last motion event occurred.

   If the last motion event occurred in a scroll bar, we set this
267
   so w32_mouse_position can know whether to report a scroll bar motion or
Geoff Voelker's avatar
Geoff Voelker committed
268 269 270
   an ordinary motion.

   If the last motion event didn't occur in a scroll bar, we set this
271
   to Qnil, to tell w32_mouse_position to return an ordinary motion event.  */
Geoff Voelker's avatar
Geoff Voelker committed
272 273 274
Lisp_Object last_mouse_scroll_bar;
int last_mouse_scroll_bar_pos;

275
/* This is a hack.  We would really prefer that w32_mouse_position would
Geoff Voelker's avatar
Geoff Voelker committed
276 277 278 279 280 281 282
   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.  */
Time last_mouse_movement_time;

283 284 285
/* Associative list linking character set strings to Windows codepages. */
Lisp_Object Vw32_charset_to_codepage_alist;

Geoff Voelker's avatar
Geoff Voelker committed
286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
/* Incremented by w32_read_socket whenever it really tries to read events.  */
#ifdef __STDC__
static int volatile input_signal_count;
#else
static int input_signal_count;
#endif

extern Lisp_Object Vcommand_line_args, Vsystem_name;

extern Lisp_Object Qface, Qmouse_face;

extern int errno;

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

302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386
/* Enumeration for overriding/changing the face to use for drawing
   glyphs in x_draw_glyphs.  */

enum draw_glyphs_face
{
  DRAW_NORMAL_TEXT,
  DRAW_INVERSE_VIDEO,
  DRAW_CURSOR,
  DRAW_MOUSE_FACE,
  DRAW_IMAGE_RAISED,
  DRAW_IMAGE_SUNKEN
};

static void x_update_window_end P_ ((struct window *, int));
static void frame_to_window_pixel_xy P_ ((struct window *, int *, int *));
void w32_delete_display P_ ((struct w32_display_info *));
static int fast_find_position P_ ((struct window *, int, int *, int *,
				   int *, int *));
static void set_output_cursor P_ ((struct cursor_pos *));
static struct glyph *x_y_to_hpos_vpos P_ ((struct window *, int, int,
					   int *, int *, int *));
static void note_mode_line_highlight P_ ((struct window *, int, int));
static void x_check_font P_ ((struct frame *, XFontStruct *));
static void note_mouse_highlight P_ ((struct frame *, int, int));
static void note_tool_bar_highlight P_ ((struct frame *f, int, int));
static void w32_handle_tool_bar_click P_ ((struct frame *,
                                          struct input_event *));
static void show_mouse_face P_ ((struct w32_display_info *,
				 enum draw_glyphs_face));
void clear_mouse_face P_ ((struct w32_display_info *));

void x_lower_frame P_ ((struct frame *));
void x_scroll_bar_clear P_ ((struct frame *));
void x_wm_set_size_hint P_ ((struct frame *, long, int));
void x_raise_frame P_ ((struct frame *));
void x_set_window_size P_ ((struct frame *, int, int, int));
void x_wm_set_window_state P_ ((struct frame *, int));
void x_wm_set_icon_pixmap P_ ((struct frame *, int));
void w32_initialize P_ ((void));
static void x_font_min_bounds P_ ((XFontStruct *, int *, int *));
int x_compute_min_glyph_bounds P_ ((struct frame *));
static void x_draw_phys_cursor_glyph P_ ((struct window *,
					  struct glyph_row *,
					  enum draw_glyphs_face));
static void x_update_end P_ ((struct frame *));
static void w32_frame_up_to_date P_ ((struct frame *));
static void w32_reassert_line_highlight P_ ((int, int));
static void x_change_line_highlight P_ ((int, int, int, int));
static void w32_set_terminal_modes P_ ((void));
static void w32_reset_terminal_modes P_ ((void));
static void w32_cursor_to P_ ((int, int, int, int));
static void x_write_glyphs P_ ((struct glyph *, int));
static void x_clear_end_of_line P_ ((int));
static void x_clear_frame P_ ((void));
static void x_clear_cursor P_ ((struct window *));
static void frame_highlight P_ ((struct frame *));
static void frame_unhighlight P_ ((struct frame *));
static void w32_new_focus_frame P_ ((struct w32_display_info *,
                                     struct frame *));
static void w32_frame_rehighlight P_ ((struct frame *));
static void x_frame_rehighlight P_ ((struct w32_display_info *));
static void x_draw_hollow_cursor P_ ((struct window *, struct glyph_row *));
static void x_draw_bar_cursor P_ ((struct window *, struct glyph_row *));
static int w32_intersect_rectangles P_ ((RECT *, RECT *, RECT *));
static void expose_frame P_ ((struct frame *, int, int, int, int));
static void expose_window_tree P_ ((struct window *, RECT *));
static void expose_window P_ ((struct window *, RECT *));
static void expose_area P_ ((struct window *, struct glyph_row *,
			     RECT *, enum glyph_row_area));
static void expose_line P_ ((struct window *, struct glyph_row *,
			     RECT *));
void x_update_cursor P_ ((struct frame *, int));
static void x_update_cursor_in_window_tree P_ ((struct window *, int));
static void x_update_window_cursor P_ ((struct window *, int));
static void x_erase_phys_cursor P_ ((struct window *));
void x_display_cursor P_ ((struct window *w, int, int, int, int, int));
void x_display_and_set_cursor P_ ((struct window *, int, int, int, int, int));
static void w32_draw_bitmap P_ ((struct window *, HDC hdc, struct glyph_row *, 
                                 enum bitmap_type));
static int x_phys_cursor_in_rect_p P_ ((struct window *, RECT *));
static void x_draw_row_bitmaps P_ ((struct window *, struct glyph_row *));
static void note_overwritten_text_cursor P_ ((struct window *, int, int));
static void w32_clip_to_row P_ ((struct window *, struct glyph_row *,
                               HDC, int));

Geoff Voelker's avatar
Geoff Voelker committed
387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417
static Lisp_Object Qvendor_specific_keysyms;


#if 0
/* This is a function useful for recording debugging information
   about the sequence of occurrences in this file.  */

struct record 
{
  char *locus;
  int type;
};

struct record event_record[100];

int event_record_index;

record_event (locus, type)
     char *locus;
     int type;
{
  if (event_record_index == sizeof (event_record) / sizeof (struct record))
    event_record_index = 0;

  event_record[event_record_index].locus = locus;
  event_record[event_record_index].type = type;
  event_record_index++;
}

#endif /* 0 */

418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466

void XChangeGC (void * ignore, XGCValues* gc, unsigned long mask,
                XGCValues *xgcv)
{
  if (mask & GCForeground)
    gc->foreground = xgcv->foreground;
  if (mask & GCBackground)
    gc->background = xgcv->background;
  if (mask & GCFont)
    gc->font = xgcv->font;
}

XGCValues *XCreateGC (void * ignore, Window window, unsigned long mask,
                      XGCValues *xgcv)
{
  XGCValues *gc = (XGCValues *) xmalloc (sizeof (XGCValues));
  bzero (gc, sizeof (XGCValues));

  XChangeGC (ignore, gc, mask, xgcv);

  return gc;
}

void XGetGCValues (void* ignore, XGCValues *gc,
                   unsigned long mask, XGCValues *xgcv)
{
  XChangeGC (ignore, xgcv, mask, gc);
}

void XTextExtents16 (XFontStruct *font, wchar_t *text, int nchars,
                     int *direction,int *font_ascent,
                     int *font_descent, XCharStruct *cs)
{
  /* NTEMACS_TODO: Use GetTextMetrics to do this and inline it below. */
}

static void
w32_set_clip_rectangle (HDC hdc, RECT *rect)
{
  if (rect)
    {
      HRGN clip_region = CreateRectRgnIndirect (rect);
      SelectClipRgn (hdc, clip_region);
      DeleteObject (clip_region);
    }
  else
    SelectClipRgn (hdc, NULL);
}

467
/* Return the struct w32_display_info.  */
Geoff Voelker's avatar
Geoff Voelker committed
468

469 470
struct w32_display_info *
w32_display_info_for_display ()
Geoff Voelker's avatar
Geoff Voelker committed
471
{
472
  return (&one_w32_display_info);
Geoff Voelker's avatar
Geoff Voelker committed
473 474
}

475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497

/* Draw a hollow rectangle at the specified position.  */
void
w32_draw_rectangle (HDC hdc, XGCValues *gc, int x, int y,
                    int width, int height)
{
  HBRUSH hb, oldhb;
  HPEN hp, oldhp;

  hb = CreateSolidBrush (gc->background);
  hp = CreatePen (PS_SOLID, 0, gc->foreground);
  oldhb = SelectObject (hdc, hb);
  oldhp = SelectObject (hdc, hp);

  Rectangle (hdc, x, y, x + width, y + height);

  SelectObject (hdc, oldhb);
  SelectObject (hdc, oldhp);
  DeleteObject (hb);
  DeleteObject (hp);
}

/* Draw a filled rectangle at the specified position. */
Geoff Voelker's avatar
Geoff Voelker committed
498
void 
499
w32_fill_rect (f, hdc, pix, lprect)
Geoff Voelker's avatar
Geoff Voelker committed
500
     FRAME_PTR f;
501
     HDC hdc;
Geoff Voelker's avatar
Geoff Voelker committed
502 503 504 505 506
     COLORREF pix;
     RECT * lprect;
{
  HBRUSH hb;
  RECT rect;
507

Geoff Voelker's avatar
Geoff Voelker committed
508 509 510 511 512 513
  hb = CreateSolidBrush (pix);
  FillRect (hdc, lprect, hb);
  DeleteObject (hb);
}

void 
514
w32_clear_window (f)
Geoff Voelker's avatar
Geoff Voelker committed
515 516 517
     FRAME_PTR f;
{
  RECT rect;
518
  HDC hdc = get_frame_dc (f);
Geoff Voelker's avatar
Geoff Voelker committed
519

520
  GetClientRect (FRAME_W32_WINDOW (f), &rect);
521 522
  w32_clear_rect (f, hdc, &rect);
  release_frame_dc (f, hdc);
Geoff Voelker's avatar
Geoff Voelker committed
523 524 525
}


526 527 528 529 530 531 532 533 534
/***********************************************************************
		    Starting and ending an update
 ***********************************************************************/
									
/* Start an update of frame F.  This function is installed as a hook
   for update_begin, i.e. it is called when update_begin is called.
   This function is called prior to calls to x_update_window_begin for
   each window being updated.  Currently, there is nothing to do here
   because all interesting stuff is done on a window basis.  */
Geoff Voelker's avatar
Geoff Voelker committed
535

536
static void
537
x_update_begin (f)
Geoff Voelker's avatar
Geoff Voelker committed
538 539
     struct frame *f;
{
540 541 542 543
  /* Nothing to do.  We have to do something though, otherwise the
     function gets optimized away and the hook is no longer valid. */
  struct frame *cf = f;
}
Geoff Voelker's avatar
Geoff Voelker committed
544

545 546 547 548 549 550 551 552 553 554 555 556 557 558

/* Start update of window W.  Set the global variable updated_window
   to the window being updated and set output_cursor to the cursor
   position of W.  */

static void
x_update_window_begin (w)
     struct window *w;
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  struct w32_display_info *display_info = FRAME_W32_DISPLAY_INFO (f);

  updated_window = w;
  set_output_cursor (&w->cursor);
Geoff Voelker's avatar
Geoff Voelker committed
559 560 561

  BLOCK_INPUT;

Geoff Voelker's avatar
Geoff Voelker committed
562 563
  /* Regenerate display palette before drawing if list of requested
     colors has changed. */
564
  if (display_info->regen_palette)
Geoff Voelker's avatar
Geoff Voelker committed
565
  {
566
    w32_regenerate_palette (f);
567
    display_info->regen_palette = FALSE;
Geoff Voelker's avatar
Geoff Voelker committed
568 569
  }

570
  if (f == display_info->mouse_face_mouse_frame)
Geoff Voelker's avatar
Geoff Voelker committed
571 572
    {
      /* Don't do highlighting for mouse motion during the update.  */
573
      display_info->mouse_face_defer = 1;
Geoff Voelker's avatar
Geoff Voelker committed
574 575 576 577

      /* If the frame needs to be redrawn,
	 simply forget about any prior mouse highlighting.  */
      if (FRAME_GARBAGED_P (f))
578 579 580 581 582 583 584 585 586
	display_info->mouse_face_window = Qnil;

      /* Can we tell that this update does not affect the window
	 where the mouse highlight is?  If so, no need to turn off.
	 Likewise, don't do anything if the frame is garbaged;
	 in that case, the frame's current matrix that we would use
	 is all wrong, and we will redisplay that line anyway.  */
      if (!NILP (display_info->mouse_face_window)
	  && w == XWINDOW (display_info->mouse_face_window))
Geoff Voelker's avatar
Geoff Voelker committed
587
	{
588
	  int i;
Geoff Voelker's avatar
Geoff Voelker committed
589

590 591
          for (i = 0; i < w->desired_matrix->nrows; ++i)
	    if (MATRIX_ROW_ENABLED_P (w->desired_matrix, i))
Geoff Voelker's avatar
Geoff Voelker committed
592 593
	      break;

594 595
	  if (i < w->desired_matrix->nrows)
	    clear_mouse_face (display_info);
Geoff Voelker's avatar
Geoff Voelker committed
596 597 598 599 600 601
	}
    }

  UNBLOCK_INPUT;
}

602 603 604 605

/* Draw a vertical window border to the right of window W if W doesn't
   have vertical scroll bars.  */

606
static void
607 608
x_draw_vertical_border (w)
     struct window *w;
Geoff Voelker's avatar
Geoff Voelker committed
609
{
610 611 612 613 614 615 616 617 618 619
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  
  /* Redraw borders between horizontally adjacent windows.  Don't
     do it for frames with vertical scroll bars because either the
     right scroll bar of a window, or the left scroll bar of its
     neighbor will suffice as a border.  */
  if (!WINDOW_RIGHTMOST_P (w)
      && !FRAME_HAS_VERTICAL_SCROLL_BARS (f))
    {
      RECT r;
620
      HDC hdc;
Geoff Voelker's avatar
Geoff Voelker committed
621

622 623 624 625
      window_box_edges (w, -1, &r.left, &r.top, &r.right, &r.bottom);
      r.left = r.right + FRAME_X_RIGHT_FLAGS_AREA_WIDTH (f);
      r.right = r.left + 1;
      r.bottom -= 1;
Geoff Voelker's avatar
Geoff Voelker committed
626

627 628 629
      hdc = get_frame_dc (f);
      w32_fill_rect (f, hdc, FRAME_FOREGROUND_PIXEL (f), r);
      release_frame_dc (f, hdc);
630 631
    }
}
Geoff Voelker's avatar
Geoff Voelker committed
632

633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664
   
/* End update of window W (which is equal to updated_window).  Draw
   vertical borders between horizontally adjacent windows, and display
   W's cursor if CURSOR_ON_P is non-zero.  W may be a menu bar
   pseudo-window in case we don't have X toolkit support.  Such
   windows don't have a cursor, so don't display it here.  */

static void
x_update_window_end (w, cursor_on_p)
     struct window *w;
     int cursor_on_p;
{
  if (!w->pseudo_window_p)
    {
      BLOCK_INPUT;
      if (cursor_on_p)
	x_display_and_set_cursor (w, 1, output_cursor.hpos,
				  output_cursor.vpos,
				  output_cursor.x, output_cursor.y);
      x_draw_vertical_border (w);
      UNBLOCK_INPUT;
    }
  
  updated_window = NULL;
}

static void
x_update_end (f)
     struct frame *f;
{
  /* Mouse highlight may be displayed again.  */
  FRAME_W32_DISPLAY_INFO (f)->mouse_face_defer = 0;
Geoff Voelker's avatar
Geoff Voelker committed
665 666
}

667 668 669
/* This function is called from various places in xdisp.c whenever a
   complete update has been performed.  The global variable
   updated_window is not available here.  */
Geoff Voelker's avatar
Geoff Voelker committed
670

671
static void
672
w32_frame_up_to_date (f)
673
     struct frame *f;
Geoff Voelker's avatar
Geoff Voelker committed
674
{
675
  if (FRAME_W32_P (f))
Geoff Voelker's avatar
Geoff Voelker committed
676
    {
677 678 679 680 681 682 683 684 685 686 687 688
      struct w32_display_info *dpyinfo = FRAME_W32_DISPLAY_INFO (f);
      if (dpyinfo->mouse_face_deferred_gc
	  || f == dpyinfo->mouse_face_mouse_frame)
	{
	  BLOCK_INPUT;
	  if (dpyinfo->mouse_face_mouse_frame)
	    note_mouse_highlight (dpyinfo->mouse_face_mouse_frame,
				  dpyinfo->mouse_face_mouse_x,
				  dpyinfo->mouse_face_mouse_y);
	  dpyinfo->mouse_face_deferred_gc = 0;
	  UNBLOCK_INPUT;
	}
Geoff Voelker's avatar
Geoff Voelker committed
689 690
    }
}
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722


/* Draw truncation mark bitmaps, continuation mark bitmaps, overlay
   arrow bitmaps, or clear the areas where they would be displayed
   before DESIRED_ROW is made current.  The window being updated is
   found in updated_window.  This function It is called from
   update_window_line only if it is known that there are differences
   between bitmaps to be drawn between current row and DESIRED_ROW.  */

static void
x_after_update_window_line (desired_row)
     struct glyph_row *desired_row;
{
  struct window *w = updated_window;
  
  xassert (w);
  
  if (!desired_row->mode_line_p && !w->pseudo_window_p)
    {
      BLOCK_INPUT;
      x_draw_row_bitmaps (w, desired_row);

      /* When a window has disappeared, make sure that no rest of
	 full-width rows stays visible in the internal border.  */
      if (windows_or_buffers_changed)
	{
	  struct frame *f = XFRAME (w->frame);
	  int width = FRAME_INTERNAL_BORDER_WIDTH (f);
	  int height = desired_row->visible_height;
	  int x = (window_box_right (w, -1)
                   + FRAME_X_RIGHT_FLAGS_AREA_WIDTH (f));
	  int y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, desired_row->y));
723
          HDC hdc = get_frame_dc (f);
724

725 726
          w32_clear_area (f, hdc, x, y, width, height);
          release_frame_dc (f, hdc);
727 728 729 730 731 732 733 734 735 736 737 738 739
	}
      
      UNBLOCK_INPUT;
    }
}


/* Draw the bitmap WHICH in one of the areas to the left or right of
   window W.  ROW is the glyph row for which to display the bitmap; it
   determines the vertical position at which the bitmap has to be
   drawn.  */

static void
740
w32_draw_bitmap (w, hdc, row, which)
741
     struct window *w;
742
     HDC hdc;
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944
     struct glyph_row *row;
     enum bitmap_type which;
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  Window window = FRAME_W32_WINDOW (f);
  HDC compat_hdc;
  int x, y, wd, h, dy;
  unsigned short *bits;
  HBITMAP pixmap;
  HBRUSH fg_brush, orig_brush;
  HANDLE horig_obj;
  struct face *face;

  /* Must clip because of partially visible lines.  */
  w32_clip_to_row (w, row, hdc, 1);

  switch (which)
    {
    case LEFT_TRUNCATION_BITMAP:
      wd = left_width;
      h = left_height;
      bits = left_bits;
      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
	   - wd
	   - (FRAME_X_LEFT_FLAGS_AREA_WIDTH (f) - wd) / 2);
      break;
      
    case OVERLAY_ARROW_BITMAP:
      wd = ov_width;
      h = ov_height;
      bits = ov_bits;
      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
	   - wd
	   - (FRAME_X_LEFT_FLAGS_AREA_WIDTH (f) - wd) / 2);
      break;
      
    case RIGHT_TRUNCATION_BITMAP:
      wd = right_width;
      h = right_height;
      bits = right_bits;
      x = window_box_right (w, -1);
      x += (FRAME_X_RIGHT_FLAGS_AREA_WIDTH (f) - wd) / 2;
      break;

    case CONTINUED_LINE_BITMAP:
      wd = continued_width;
      h = continued_height;
      bits = continued_bits;
      x = window_box_right (w, -1);
      x += (FRAME_X_RIGHT_FLAGS_AREA_WIDTH (f) - wd) / 2;
      break;
      
    case CONTINUATION_LINE_BITMAP:
      wd = continuation_width;
      h = continuation_height;
      bits = continuation_bits;
      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
	   - wd
	   - (FRAME_X_LEFT_FLAGS_AREA_WIDTH (f) - wd) / 2);
      break;

    case ZV_LINE_BITMAP:
      wd = zv_width;
      h = zv_height;
      bits = zv_bits;
      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
	   - wd
	   - (FRAME_X_LEFT_FLAGS_AREA_WIDTH (f) - wd) / 2);
      break;

    default:
      abort ();
    }

  /* Convert to frame coordinates.  Set dy to the offset in the row to
     start drawing the bitmap.  */
  y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y);
  dy = (row->height - h) / 2;

  /* Draw the bitmap.  I believe these small pixmaps can be cached
     by the server.  */
  face = FACE_FROM_ID (f, BITMAP_AREA_FACE_ID);
  pixmap = CreateBitmap (wd, h, 1, 1, bits);

  compat_hdc = CreateCompatibleDC (hdc);
  SaveDC (hdc);
  fg_brush = CreateSolidBrush (FRAME_FOREGROUND_PIXEL (f));
  orig_brush = SelectObject (hdc, fg_brush);
  horig_obj = SelectObject (compat_hdc, pixmap);
  SetTextColor (hdc, FRAME_BACKGROUND_PIXEL (f));
  SetBkColor (hdc, FRAME_FOREGROUND_PIXEL (f));
#if 0 /* From w32bdf.c (which is from Meadow).  */
  BitBlt (hdc, x, y + dy, wd, h, compat_hdc, 0, 0, SRCCOPY);
#else
  BitBlt (hdc, x, y + dy, wd, h, compat_hdc, 0, 0, 0xB8074A);
#endif
  SelectObject (compat_hdc, horig_obj);
  SelectObject (hdc, orig_brush);
  DeleteObject (pixmap);
  DeleteObject (fg_brush);
  DeleteDC (compat_hdc);
  RestoreDC (hdc, -1);
}


/* Draw flags bitmaps for glyph row ROW on window W.  Call this
   function with input blocked.  */

static void
x_draw_row_bitmaps (w, row)
     struct window *w;
     struct glyph_row *row;
{
  struct frame *f = XFRAME (w->frame);
  enum bitmap_type bitmap;
  struct face *face;
  int header_line_height = -1;
  HDC hdc = get_frame_dc (f);

  xassert (interrupt_input_blocked);

  /* If row is completely invisible, because of vscrolling, we
     don't have to draw anything.  */
  if (row->visible_height <= 0)
    return;

  face = FACE_FROM_ID (f, BITMAP_AREA_FACE_ID);
  PREPARE_FACE_FOR_DISPLAY (f, face);

  /* Decide which bitmap to draw at the left side.  */
  if (row->overlay_arrow_p)
    bitmap = OVERLAY_ARROW_BITMAP;
  else if (row->truncated_on_left_p)
    bitmap = LEFT_TRUNCATION_BITMAP;
  else if (MATRIX_ROW_CONTINUATION_LINE_P (row))
    bitmap = CONTINUATION_LINE_BITMAP;
  else if (row->indicate_empty_line_p)
    bitmap = ZV_LINE_BITMAP;
  else
    bitmap = NO_BITMAP;

  /* Clear flags area if no bitmap to draw or if bitmap doesn't fill
     the flags area.  */
  if (bitmap == NO_BITMAP
      || FRAME_FLAGS_BITMAP_WIDTH (f) < FRAME_X_LEFT_FLAGS_AREA_WIDTH (f)
      || row->height > FRAME_FLAGS_BITMAP_HEIGHT (f))
    {
      /* If W has a vertical border to its left, don't draw over it.  */
      int border = ((XFASTINT (w->left) > 0
		     && !FRAME_HAS_VERTICAL_SCROLL_BARS (f))
		    ? 1 : 0);
      int left = window_box_left (w, -1);

      if (header_line_height < 0)
	header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w);
      
      w32_fill_area (f, hdc, face->background,
                     left - FRAME_X_LEFT_FLAGS_AREA_WIDTH (f) + border,
                     WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
                                                      row->y)),
                     FRAME_X_LEFT_FLAGS_AREA_WIDTH (f) - border,
                     row->visible_height);
    }

  /* Draw the left bitmap.  */
  if (bitmap != NO_BITMAP)
    w32_draw_bitmap (w, hdc, row, bitmap);

  /* Decide which bitmap to draw at the right side.  */
  if (row->truncated_on_right_p)
    bitmap = RIGHT_TRUNCATION_BITMAP;
  else if (row->continued_p)
    bitmap = CONTINUED_LINE_BITMAP;
  else
    bitmap = NO_BITMAP;

  /* Clear flags area if no bitmap to draw of if bitmap doesn't fill
     the flags area.  */
  if (bitmap == NO_BITMAP
      || FRAME_FLAGS_BITMAP_WIDTH (f) < FRAME_X_RIGHT_FLAGS_AREA_WIDTH (f)
      || row->height > FRAME_FLAGS_BITMAP_HEIGHT (f))
    {
      int right = window_box_right (w, -1);

      if (header_line_height < 0)
	header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w);

      w32_fill_area (f, hdc, face->background,
                     right,
                     WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
                                                      row->y)),
                     FRAME_X_RIGHT_FLAGS_AREA_WIDTH (f),
                     row->visible_height);
    }

  /* Draw the right bitmap.  */
  if (bitmap != NO_BITMAP)
    w32_draw_bitmap (w, hdc, row, bitmap);

  release_frame_dc (f, hdc);
}

Geoff Voelker's avatar
Geoff Voelker committed
945

946 947 948 949 950 951 952

/***********************************************************************
			  Line Highlighting
 ***********************************************************************/

/* External interface to control of standout mode. Not used for W32
   frames. Aborts when called.  */
Geoff Voelker's avatar
Geoff Voelker committed
953

954
static void
955
w32_reassert_line_highlight (new, vpos)
Geoff Voelker's avatar
Geoff Voelker committed
956 957
     int new, vpos;
{
958
  abort ();
Geoff Voelker's avatar
Geoff Voelker committed
959 960
}

961 962 963
/* Call this when about to modify line at position VPOS and change
   whether it is highlighted. Not used for W32 frames.  Aborts when
   called.  */
Geoff Voelker's avatar
Geoff Voelker committed
964

965
static void
966 967
x_change_line_highlight (new_highlight, vpos, y, first_unused_hpos)
     int new_highlight, vpos, y, first_unused_hpos;
Geoff Voelker's avatar
Geoff Voelker committed
968
{
969
  abort ();
Geoff Voelker's avatar
Geoff Voelker committed
970 971 972 973 974 975
}

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

976 977
static void
w32_set_terminal_modes (void)
Geoff Voelker's avatar
Geoff Voelker committed
978 979 980 981
{
}

/* This is called when exiting or suspending Emacs.
982
   Exiting will make the W32 windows go away, and suspending
Geoff Voelker's avatar
Geoff Voelker committed
983 984
   requires no action.  */

985 986
static void
w32_reset_terminal_modes (void)
Geoff Voelker's avatar
Geoff Voelker committed
987 988
{
}
989

Geoff Voelker's avatar
Geoff Voelker committed
990

991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016
/***********************************************************************
			    Output Cursor
 ***********************************************************************/

/* Set the global variable output_cursor to CURSOR.  All cursor
   positions are relative to updated_window.  */
static void
set_output_cursor (cursor)
    struct cursor_pos *cursor;
{
  output_cursor.hpos = cursor->hpos;
  output_cursor.vpos = cursor->vpos;
  output_cursor.x = cursor->x;
  output_cursor.y = cursor->y;
}


/* Set a nominal cursor position.

   HPOS and VPOS are column/row positions in a window glyph matrix.  X
   and Y are window text area relative pixel positions.
   
   If this is done during an update, updated_window will contain the
   window that is being updated and the position is the future output
   cursor position for that window.  If updated_window is null, use
   selected_window and display the cursor at the given position.  */
Geoff Voelker's avatar
Geoff Voelker committed
1017

1018
static void
1019 1020
w32_cursor_to (vpos, hpos, y, x)
     int vpos, hpos, y, x;
Geoff Voelker's avatar
Geoff Voelker committed
1021
{
1022
  struct window *w;
Geoff Voelker's avatar
Geoff Voelker committed
1023

1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
  /* If updated_window is not set, work on selected_window.  */
  if (updated_window)
    w = updated_window;
  else
    w = XWINDOW (selected_window);

  /* Set the output cursor.  */
  output_cursor.hpos = hpos;
  output_cursor.vpos = vpos;
  output_cursor.x = x;
  output_cursor.y = y;
Geoff Voelker's avatar
Geoff Voelker committed
1035

1036 1037 1038
  /* If not called as part of an update, really display the cursor.
     This will also set the cursor position of W.  */
  if (updated_window == NULL)
Geoff Voelker's avatar
Geoff Voelker committed
1039 1040
    {
      BLOCK_INPUT;
1041
      x_display_cursor (w, 1, hpos, vpos, x, y);
Geoff Voelker's avatar
Geoff Voelker committed
1042 1043 1044
      UNBLOCK_INPUT;
    }
}
1045

1046

1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
/***********************************************************************
			   Display Iterator
 ***********************************************************************/

/* Function prototypes of this page.  */

static struct face *x_get_glyph_face_and_encoding P_ ((struct frame *,
						       struct glyph *,
						       wchar_t *));
static struct face *x_get_char_face_and_encoding P_ ((struct frame *, int,
						      int, wchar_t *, int));
static XCharStruct *w32_per_char_metric P_ ((HDC hdc, XFontStruct *,
                                             wchar_t *, int unicode_p));
static void x_encode_char P_ ((int, wchar_t *, struct font_info *));
static void x_append_glyph P_ ((struct it *));
static void x_append_composite_glyph P_ ((struct it *));
static void x_append_stretch_glyph P_ ((struct it *it, Lisp_Object,
					int, int, double));
static void x_produce_glyphs P_ ((struct it *));
static void x_produce_image_glyph P_ ((struct it *it));
1067 1068


1069 1070 1071
/* Dealing with bits of wchar_t as if they were an XChar2B.  */
#define BUILD_WCHAR_T(byte1, byte2) \
 ((wchar_t)((((byte1) & 0x00ff) << 8) | ((byte2) & 0x00ff)))
1072 1073


1074 1075
#define BYTE1(ch) \
 (((ch) & 0xff00) >> 8)
1076

1077 1078
#define BYTE2(ch) \
 ((ch) & 0x00ff)
1079

1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091

/* Get metrics of character CHAR2B in FONT.  Value is always non-null.
   If CHAR2B is not contained in FONT, the font's default character
   metric is returned. If unicode_p is non-zero, use unicode functions,
   otherwise use ANSI functions.  */

static INLINE XCharStruct *
w32_per_char_metric (hdc, font, char2b, unicode_p)
     HDC hdc;
     XFontStruct *font;
     wchar_t *char2b;
     int unicode_p;
1092
{
1093 1094 1095
  /* The result metric information.  */
  XCharStruct *pcm;
  ABC char_widths;
1096
  SIZE sz;
1097
  BOOL retval;
1098

1099
  xassert (font && char2b);
1100

1101
  pcm = (XCharStruct *) xmalloc (sizeof (XCharStruct));
1102

1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
  if (font->hfont)
    SelectObject (hdc, font->hfont);

  if (unicode_p)
    retval = GetCharABCWidthsW (hdc, *char2b, *char2b, &char_widths);
  else
    retval = GetCharABCWidthsA (hdc, *char2b, *char2b, &char_widths);

  if (retval)
    {
      pcm->width = char_widths.abcA + char_widths.abcB + char_widths.abcC;
      pcm->lbearing = char_widths.abcA;
      pcm->rbearing = pcm->width - char_widths.abcC;
    }
  else
    {
1119 1120 1121 1122
      /* Windows 9x does not implement GetCharABCWidthsW, so if that
         failed, try GetTextExtentPoint32W, which is implemented and
         at least gives us some of the info we are after (total
         character width). */
1123
      if (unicode_p)
1124
          retval = GetTextExtentPoint32W (hdc, char2b, 1, &sz);
1125 1126 1127

      if (retval)
        {
1128 1129
          pcm->width = sz.cx;
          pcm->rbearing = sz.cx;
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297
          pcm->lbearing = 0;
        }
      else
        {
          pcm->width = FONT_MAX_WIDTH (font);
          pcm->rbearing = FONT_MAX_WIDTH (font);
          pcm->lbearing = 0;
        }
    }

  pcm->ascent = FONT_BASE (font);
  pcm->descent = FONT_DESCENT (font);

  return pcm;
}


/* Encode CHAR2B using encoding information from FONT_INFO.  CHAR2B is
   the two-byte form of C.  Encoding is returned in *CHAR2B.  */

static INLINE void
x_encode_char (c, char2b, font_info)
     int c;
     wchar_t *char2b;
     struct font_info *font_info;
{
  int charset = CHAR_CHARSET (c);
  int codepage;
  XFontStruct *font = font_info->font;

  /* FONT_INFO may define a scheme by which to encode byte1 and byte2.
     This may be either a program in a special encoder language or a
     fixed encoding.  */
  if (font_info->font_encoder)
    {
      /* It's a program.  */
      struct ccl_program *ccl = font_info->font_encoder;

      if (CHARSET_DIMENSION (charset) == 1)
	{
	  ccl->reg[0] = charset;
	  ccl->reg[1] = BYTE2 (*char2b);
	}
      else
	{
	  ccl->reg[0] = charset;
	  ccl->reg[1] = BYTE1 (*char2b);
	  ccl->reg[2] = BYTE2 (*char2b);
	}

      ccl_driver (ccl, NULL, NULL, 0, 0, NULL);

      /* We assume that MSBs are appropriately set/reset by CCL
	 program.  */
      /* NTEMACS_TODO : Use GetFontLanguageInfo to determine if
         font is double byte. */
#if 0
      if (FONT_MAX_BYTE1 (font) == 0)	/* 1-byte font */
#endif
	*char2b = BUILD_WCHAR_T (0, ccl->reg[1]);
#if 0
      else
	*char2b = BUILD_WCHAR_T (ccl->reg[1], ccl->reg[2]);
#endif
    }
  else if (font_info->encoding[charset])
    {
      /* Fixed encoding scheme.  See fontset.h for the meaning of the
	 encoding numbers.  */
      int enc = font_info->encoding[charset];
      
      if ((enc == 1 || enc == 2)
	  && CHARSET_DIMENSION (charset) == 2)
	*char2b = BUILD_WCHAR_T (BYTE1 (*char2b) | 0x80, BYTE2 (*char2b));
      
      if (enc == 1 || enc == 3
          || (enc == 4 && CHARSET_DIMENSION (charset) == 1))
	*char2b = BUILD_WCHAR_T (BYTE1 (*char2b), BYTE2 (*char2b) | 0x80);
      else if (enc == 4)
        {
          int sjis1, sjis2;

          ENCODE_SJIS (BYTE1 (*char2b), BYTE2 (*char2b),
                       sjis1, sjis2);
          *char2b = BUILD_WCHAR_T (sjis1, sjis2);
        }
    }
  codepage = w32_codepage_for_font (font_info->name);

  /* If charset is not ASCII or Latin-1, may need to move it into
     Unicode space.  */
  if ( font && !font->bdf && w32_use_unicode_for_codepage (codepage)
       && charset != CHARSET_ASCII && charset != charset_latin_iso8859_1)
    {
      char temp[3];
      temp[0] = BYTE1 (*char2b);
      temp[1] = BYTE2 (*char2b);
      temp[2] = '\0';
      if (temp[0])
        MultiByteToWideChar (codepage, 0, temp, 2, char2b, 1);
      else
        MultiByteToWideChar (codepage, 0, temp+1, 1, char2b, 1);
    }
}


/* Get face and two-byte form of character C in face FACE_ID on frame
   F.  The encoding of C is returned in *CHAR2B.  MULTIBYTE_P non-zero
   means we want to display multibyte text.  Value is a pointer to a
   realized face that is ready for display.  */

static INLINE struct face *
x_get_char_face_and_encoding (f, c, face_id, char2b, multibyte_p)
     struct frame *f;
     int c, face_id;
     wchar_t *char2b;
     int multibyte_p;
{
  struct face *face = FACE_FROM_ID (f, face_id);

  if (!multibyte_p)
    {
      /* Unibyte case.  We don't have to encode, but we have to make
	 sure to use a face suitable for unibyte.  */
      *char2b = BUILD_WCHAR_T (0, c);
      
      if (!FACE_SUITABLE_FOR_CHARSET_P (face, -1))
	{
	  face_id = FACE_FOR_CHARSET (f, face_id, -1);
	  face = FACE_FROM_ID (f, face_id);
	}
    }
  else if (c < 128 && face_id < BASIC_FACE_ID_SENTINEL)
    {
      /* Case of ASCII in a face known to fit ASCII.  */
      *char2b = BUILD_WCHAR_T (0, c);
    }
  else
    {
      int c1, c2, charset;
      
      /* Split characters into bytes.  If c2 is -1 afterwards, C is
	 really a one-byte character so that byte1 is zero.  */
      SPLIT_CHAR (c, charset, c1, c2);
      if (c2 > 0)
	*char2b = BUILD_WCHAR_T (c1, c2);
      else
	*char2b = BUILD_WCHAR_T (0, c1);

      /* Get the face for displaying C.  If `face' is not suitable for
	 charset, get the one that fits.  (This can happen for the
	 translations of a composition where the glyph
	 specifies a face for the first component, but the other
         components have a different charset.)  */
      if (!FACE_SUITABLE_FOR_CHARSET_P (face, charset))
	{
	  face_id = FACE_FOR_CHARSET (f, face_id, charset);
	  face = FACE_FROM_ID (f, face_id);
	}
  
      /* Maybe encode the character in *CHAR2B.  */
      if (charset != CHARSET_ASCII)
	{
	  struct font_info *font_info
	    = FONT_INFO_FROM_ID (f, face->font_info_id);
	  if (font_info)
	    {
	      x_encode_char (c, char2b, font_info);
1298
#if 0 /* NTEMACS_TODO: Isn't this undoing what we just did?  Investigate. */
1299 1300 1301
	      if (charset == charset_latin_iso8859_1)
                *char2b = BUILD_WCHAR_T (BYTE1 (*char2b),
                                         BYTE2 (*char2b) | 0x80);
1302
#endif
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361
	    }
	}
    }

  /* Make sure X resources of the face are allocated.  */
  xassert (face != NULL);
  PREPARE_FACE_FOR_DISPLAY (f, face);
  
  return face;
}


/* Get face and two-byte form of character glyph GLYPH on frame F.
   The encoding of GLYPH->u.ch is returned in *CHAR2B.  Value is
   a pointer to a realized face that is ready for display.  */

static INLINE struct face *
x_get_glyph_face_and_encoding (f, glyph, char2b)
     struct frame *f;
     struct glyph *glyph;
     wchar_t *char2b;
{
  struct face *face;

  xassert (glyph->type == CHAR_GLYPH);
  face = FACE_FROM_ID (f, glyph->face_id);

  if (!glyph->multibyte_p)
    {
      /* Unibyte case.  We don't have to encode, but we have to make
	 sure to use a face suitable for unibyte.  */
      *char2b = BUILD_WCHAR_T (0, glyph->u.ch);
    }
  else if (glyph->u.ch < 128
	   && glyph->face_id < BASIC_FACE_ID_SENTINEL)
    {
      /* Case of ASCII in a face known to fit ASCII.  */
      *char2b = BUILD_WCHAR_T (0, glyph->u.ch);
    }
  else
    {
      int c1, c2, charset;
      
      /* Split characters into bytes.  If c2 is -1 afterwards, C is
	 really a one-byte character so that byte1 is zero.  */
      SPLIT_CHAR (glyph->u.ch, charset, c1, c2);
      if (c2 > 0)
	*char2b = BUILD_WCHAR_T (c1, c2);
      else
	*char2b = BUILD_WCHAR_T (0, c1);

      /* Maybe encode the character in *CHAR2B.  */
      if (charset != CHARSET_ASCII)
	{
	  struct font_info *font_info
	    = FONT_INFO_FROM_ID (f, face->font_info_id);
	  if (font_info)
	    {
	      x_encode_char (glyph->u.ch, char2b, font_info);
1362
#if 0 /* NTEMACS_TODO: Isn't this undoing what we just did?  Investigate. */
1363 1364 1365
	      if (charset == charset_latin_iso8859_1)
		*char2b = BUILD_WCHAR_T (BYTE1 (*char2b),
                                         BYTE2 (*char2b) | 0x80);
1366
#endif
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762
	    }
	}
    }

  /* Make sure X resources of the face are allocated.  */
  xassert (face != NULL);
  PREPARE_FACE_FOR_DISPLAY (f, face);
  return face;
}


/* Store one glyph for IT->char_to_display in IT->glyph_row.  
   Called from x_produce_glyphs when IT->glyph_row is non-null.  */

static INLINE void
x_append_glyph (it)
     struct it *it;
{
  struct glyph *glyph;
  enum glyph_row_area area = it->area;
  
  xassert (it->glyph_row);
  xassert (it->char_to_display != '\n' && it->char_to_display != '\t');
  
  glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area];
  if (glyph < it->glyph_row->glyphs[area + 1])
    {
      /* Play it safe.  If sub-structures of the glyph are not all the
	 same size, it otherwise be that some bits stay set.  This
	 would prevent a comparison with GLYPH_EQUAL_P.  */
      glyph->u.val = 0;
      
      glyph->type = CHAR_GLYPH;
      glyph->pixel_width = it->pixel_width;
      glyph->u.ch = it->char_to_display;
      glyph->face_id = it->face_id;
      glyph->charpos = CHARPOS (it->position);
      glyph->object = it->object;
      glyph->left_box_line_p = it->start_of_box_run_p;
      glyph->right_box_line_p = it->end_of_box_run_p;
      glyph->voffset = it->voffset;
      glyph->multibyte_p = it->multibyte_p;
      glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent
				      || it->phys_descent > it->descent);
      ++it->glyph_row->used[area];
    }
}

/* Store one glyph for the composition IT->cmp_id in IT->glyph_row.  
   Called from x_produce_glyphs when IT->glyph_row is non-null.  */

static INLINE void
x_append_composite_glyph (it)
     struct it *it;
{
  struct glyph *glyph;
  enum glyph_row_area area = it->area;
  
  xassert (it->glyph_row);
  
  glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area];
  if (glyph < it->glyph_row->glyphs[area + 1])
    {
      /* Play it safe.  If sub-structures of the glyph are not all the
	 same size, it otherwise be that some bits stay set.  This
	 would prevent a comparison with GLYPH_EQUAL_P.  */
      glyph->u.val = 0;
      
      glyph->type = COMPOSITE_GLYPH;
      glyph->pixel_width = it->pixel_width;
      glyph->u.cmp_id = it->cmp_id;
      glyph->face_id = it->face_id;
      glyph->charpos = CHARPOS (it->position);
      glyph->object = it->object;
      glyph->left_box_line_p = it->start_of_box_run_p;
      glyph->right_box_line_p = it->end_of_box_run_p;
      glyph->voffset = it->voffset;
      glyph->multibyte_p = it->multibyte_p;
      glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent
				      || it->phys_descent > it->descent);
      ++it->glyph_row->used[area];
    }
}


/* Change IT->ascent and IT->height according to the setting of
   IT->voffset.  */

static INLINE void
take_vertical_position_into_account (it)
     struct it *it;
{
  if (it->voffset)
    {
      if (it->voffset < 0)
	/* Increase the ascent so that we can display the text higher
	   in the line.  */
	it->ascent += abs (it->voffset);
      else
	/* Increase the descent so that we can display the text lower
	   in the line.  */
	it->descent += it->voffset;
    }
}


/* Produce glyphs/get display metrics for the image IT is loaded with.
   See the description of struct display_iterator in dispextern.h for
   an overview of struct display_iterator.  */

static void
x_produce_image_glyph (it)
     struct it *it;
{
  struct image *img;
  struct face *face;

  xassert (it->what == IT_IMAGE);

  face = FACE_FROM_ID (it->f, it->face_id);
  img = IMAGE_FROM_ID (it->f, it->image_id);
  xassert (img);

  /* Make sure X resources of the face and image are loaded.  */
  PREPARE_FACE_FOR_DISPLAY (it->f, face);
  prepare_image_for_display (it->f, img);

  it->ascent = it->phys_ascent = IMAGE_ASCENT (img);
  it->descent = it->phys_descent = img->height + 2 * img->margin - it->ascent;
  it->pixel_width = img->width + 2 * img->margin;

  it->nglyphs = 1;
  
  if (face->box != FACE_NO_BOX)
    {
      it->ascent += face->box_line_width;
      it->descent += face->box_line_width;
      
      if (it->start_of_box_run_p)
	it->pixel_width += face->box_line_width;
      if (it->end_of_box_run_p)
	it->pixel_width += face->box_line_width;
    }

  take_vertical_position_into_account (it);
  
  if (it->glyph_row)
    {
      struct glyph *glyph;
      enum glyph_row_area area = it->area;
      
      glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area];
      if (glyph < it->glyph_row->glyphs[area + 1])
	{
	  glyph->type = IMAGE_GLYPH;
	  glyph->u.img_id = img->id;
	  glyph->face_id = it->face_id;
	  glyph->pixel_width = it->pixel_width;
	  glyph->charpos = CHARPOS (it->position);
	  glyph->object = it->object;
	  glyph->left_box_line_p = it->start_of_box_run_p;
	  glyph->right_box_line_p = it->end_of_box_run_p;
	  glyph->voffset = it->voffset;
	  glyph->multibyte_p = it->multibyte_p;
	  ++it->glyph_row->used[area];
	}
    }
}


/* Append a stretch glyph to IT->glyph_row.  OBJECT is the source
   of the glyph, WIDTH and HEIGHT are the width and height of the 
   stretch.  ASCENT is the percentage/100 of HEIGHT to use for the 
   ascent of the glyph (0 <= ASCENT <= 1).  */
  
static void
x_append_stretch_glyph (it, object, width, height, ascent)
     struct it *it;
     Lisp_Object object;
     int width, height;
     double ascent;
{
  struct glyph *glyph;
  enum glyph_row_area area = it->area;

  xassert (ascent >= 0 && ascent <= 1);
  
  glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area];
  if (glyph < it->glyph_row->glyphs[area + 1])
    {
      glyph->type = STRETCH_GLYPH;
      glyph->u.stretch.ascent = height * ascent;
      glyph->u.stretch.height = height;
      glyph->face_id = it->face_id;
      glyph->pixel_width = width;
      glyph->charpos = CHARPOS (it->position);
      glyph->object = object;
      glyph->left_box_line_p = it->start_of_box_run_p;
      glyph->right_box_line_p = it->end_of_box_run_p;
      glyph->voffset = it->voffset;
      glyph->multibyte_p = it->multibyte_p;
      ++it->glyph_row->used[area];
    }
}


/* Produce a stretch glyph for iterator IT.  IT->object is the value
   of the glyph property displayed.  The value must be a list
   `(space KEYWORD VALUE ...)' with the following KEYWORD/VALUE pairs
   being recognized:

   1. `:width WIDTH' specifies that the space should be WIDTH *
   canonical char width wide.  WIDTH may be an integer or floating 
   point number.

   2. `:relative-width FACTOR' specifies that the width of the stretch
   should be computed from the width of the first character having the
   `glyph' property, and should be FACTOR times that width.

   3. `:align-to HPOS' specifies that the space should be wide enough
   to reach HPOS, a value in canonical character units.

   Exactly one of the above pairs must be present.  

   4. `:height HEIGHT' specifies that the height of the stretch produced
   should be HEIGHT, measured in canonical character units.

   5. `:relative-height FACTOR' specifies that the height of the the
   stretch should be FACTOR times the height of the characters having
   the glyph property.

   Either none or exactly one of 4 or 5 must be present.

   6. `:ascent ASCENT'  specifies that ASCENT percent of the height
   of the stretch should be used for the ascent of the stretch.
   ASCENT must be in the range 0 <= ASCENT <= 100.  */

#define NUMVAL(X)				\
     ((INTEGERP (X) || FLOATP (X))		\
      ? XFLOATINT (X)				\
      : - 1)


static void
x_produce_stretch_glyph (it)
     struct it *it;
{
  /* (space :width WIDTH :height HEIGHT.  */
  extern Lisp_Object QCwidth, QCheight, QCascent, Qspace;
  extern Lisp_Object QCrelative_width, QCrelative_height;
  extern Lisp_Object QCalign_to;
  Lisp_Object prop, plist;
  double width = 0, height = 0, ascent = 0;
  struct face *face = FACE_FROM_ID (it->f, it->face_id);
  XFontStruct *font = face->font ? face->font : FRAME_FONT (it->f);

  PREPARE_FACE_FOR_DISPLAY (it->f, face);
  
  /* List should start with `space'.  */
  xassert (CONSP (it->object) && EQ (XCAR (it->object), Qspace));
  plist = XCDR (it->object);

  /* Compute the width of the stretch.  */
  if (prop = Fplist_get (plist, QCwidth),
      NUMVAL (prop) > 0)
    /* Absolute width `:width WIDTH' specified and valid.  */
    width = NUMVAL (prop) * CANON_X_UNIT (it->f);
  else if (prop = Fplist_get (plist, QCrelative_width),
	   NUMVAL (prop) > 0)
    {
      /* Relative width `:relative-width FACTOR' specified and valid.
	 Compute the width of the characters having the `glyph'
	 property.  */
      struct it it2;
      unsigned char *p = BYTE_POS_ADDR (IT_BYTEPOS (*it));
      
      it2 = *it;
      if (it->multibyte_p)
	{
	  int maxlen = ((IT_BYTEPOS (*it) >= GPT ? ZV : GPT)
			- IT_BYTEPOS (*it));
	  it2.c = STRING_CHAR_AND_LENGTH (p, maxlen, it2.len);
	}
      else
	it2.c = *p, it2.len = 1;

      it2.glyph_row = NULL;
      it2.what = IT_CHARACTER;
      x_produce_glyphs (&it2);
      width = NUMVAL (prop) * it2.pixel_width;
    }
  else if (prop = Fplist_get (plist, QCalign_to),
	   NUMVAL (prop) > 0)
    width = NUMVAL (prop) * CANON_X_UNIT (it->f) - it->current_x;
  else
    /* Nothing specified -> width defaults to canonical char width.  */
    width = CANON_X_UNIT (it->f);
  
  /* Compute height.  */
  if (prop = Fplist_get (plist, QCheight),
      NUMVAL (prop) > 0)
    height = NUMVAL (prop) * CANON_Y_UNIT (it->f);
  else if (prop = Fplist_get (plist, QCrelative_height),
	   NUMVAL (prop) > 0)
    height = FONT_HEIGHT (font) * NUMVAL (prop);
  else
    height = FONT_HEIGHT (font);

  /* Compute percentage of height used for ascent.  If 
     `:ascent ASCENT' is present and valid, use that.  Otherwise,
     derive the ascent from the font in use.  */
  if (prop = Fplist_get (plist, QCascent),
      NUMVAL (prop) > 0 && NUMVAL (prop) <= 100)
    ascent = NUMVAL (prop) / 100.0;
  else
    ascent = (double) FONT_BASE (font) / FONT_HEIGHT (font);

  if (width <= 0)
    width = 1;
  if (height <= 0)
    height = 1;

  if (it->glyph_row)
    {
      Lisp_Object object = it->stack[it->sp - 1].string;
      if (!STRINGP (object))
	object = it->w->buffer;
      x_append_stretch_glyph (it, object, width, height, ascent);
    }

  it->pixel_width = width;
  it->ascent = it->phys_ascent = height * ascent;
  it->descent = it->phys_descent = height - it->ascent;
  it->nglyphs = 1;

  if (face->box != FACE_NO_BOX)
    {
      it->ascent += face->box_line_width;
      it->descent += face->box_line_width;
      
      if (it->start_of_box_run_p)
	it->pixel_width += face->box_line_width;
      if (it->end_of_box_run_p)
	it->pixel_width += face->box_line_width;
    }
  
  take_vertical_position_into_account (it);
}

/* Return proper value to be used as baseline offset of font that has
   ASCENT and DESCENT to draw characters by the font at the vertical
   center of the line of frame F.

   Here, out task is to find the value of BOFF in the following figure;

	-------------------------+-----------+-
	 -+-+---------+-+        |           |
	  | |         | |        |           |
	  | |         | |        F_ASCENT    F_HEIGHT
	  | |         | ASCENT   |           |
     HEIGHT |         | |        |           |
	  | |         |-|-+------+-----------|------- baseline
	  | |         | | BOFF   |           |
	  | |---------|-+-+      |           |
	  | |         | DESCENT  |           |
	 -+-+---------+-+        F_DESCENT   |
	-------------------------+-----------+-

	-BOFF + DESCENT + (F_HEIGHT - HEIGHT) / 2 = F_DESCENT
	BOFF = DESCENT +  (F_HEIGHT - HEIGHT) / 2 - F_DESCENT
	DESCENT = FONT->descent
	HEIGHT = FONT_HEIGHT (FONT)
	F_DESCENT = (F->output_data.x->font->descent
		     - F->output_data.x->baseline_offset)
	F_HEIGHT = FRAME_LINE_HEIGHT (F)
*/

#define VCENTER_BASELINE_OFFSET(FONT, F)			\
 (FONT_DESCENT (FONT)						\
  + (FRAME_LINE_HEIGHT ((F)) - FONT_HEIGHT ((FONT))) / 2	\
  - (FONT_DESCENT (FRAME_FONT (F)) - FRAME_BASELINE_OFFSET (F)))

/* Produce glyphs/get display metrics for the display element IT is
   loaded with.  See the description of struct display_iterator in
   dispextern.h for an overview of struct display_iterator.  */

static void
x_produce_glyphs (it)
     struct it *it;
{
  if (it->what == IT_CHARACTER)
    {
      wchar_t char2b;
      XFontStruct *font;
      struct face *face;
      XCharStruct *pcm;
1763
     int font_not_found_p;
1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910
      struct font_info *font_info;
      int boff;                 /* baseline offset */
      HDC hdc;

      hdc = get_frame_dc (it->f);

      /* Maybe translate single-byte characters to multibyte.  */
      it->char_to_display = it->c;
      if (unibyte_display_via_language_environment
	  && SINGLE_BYTE_CHAR_P (it->c)
	  && (it->c >= 0240
	      || (it->c >= 0200
		  && !NILP (Vnonascii_translation_table))))
	{
	  it->char_to_display = unibyte_char_to_multibyte (it->c);
	  it->charset = CHAR_CHARSET (it->char_to_display);
	}
      
      /* Get face and font to use.  Encode IT->char_to_display.  */
      face = x_get_char_face_and_encoding (it->f, it->char_to_display,
					   it->face_id, &char2b,
					   it->multibyte_p);
      font = face->font;

      /* When no suitable font found, use the default font.  */
      font_not_found_p = font == NULL;
      if (font_not_found_p)
        {
          font = FRAME_FONT (it->f);
	  boff = it->f->output_data.w32->baseline_offset;
	  font_info = NULL;
	}
      else
	{
	  font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id);
	  boff = font_info->baseline_offset;
	  if (font_info->vertical_centering)
	    boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff;
	}

      if (font->hfont)
        SelectObject (hdc, font->hfont);

      if (it->char_to_display >= ' '
	  && (!it->multibyte_p || it->char_to_display < 128))
	{
	  /* Either unibyte or ASCII.  */
	  int stretched_p;

	  it->nglyphs = 1;

          pcm = w32_per_char_metric (hdc, font, &char2b, 0);
	  it->ascent = FONT_BASE (font) + boff;
	  it->descent = FONT_DESCENT (font) - boff;
          it->phys_ascent = pcm->ascent + boff;
          it->phys_descent = pcm->descent - boff;
	  it->pixel_width = pcm->width;

	  /* If this is a space inside a region of text with
	     `space-width' property, change its width.  */
	  stretched_p = it->char_to_display == ' ' && !NILP (it->space_width);
	  if (stretched_p)
	    it->pixel_width *= XFLOATINT (it->space_width);

	  /* If face has a box, add the box thickness to the character
	     height.  If character has a box line to the left and/or
	     right, add the box line width to the character's width.  */
	  if (face->box != FACE_NO_BOX)
	    {
	      int thick = face->box_line_width;
	      
	      it->ascent += thick;
	      it->descent += thick;
	      
	      if (it->start_of_box_run_p)
		it->pixel_width += thick;
	      if (it->end_of_box_run_p)
		it->pixel_width += thick;
	    }

	  /* If face has an overline, add the height of the overline
	     (1 pixel) and a 1 pixel margin to the character height.  */
	  if (face->overline_p)
	    it->ascent += 2;

	  take_vertical_position_into_account (it);
  
	  /* If we have to actually produce glyphs, do it.  */
	  if (it->glyph_row)
	    {
	      if (stretched_p)
		{
		  /* Translate a space with a `space-width' property
		     into a stretch glyph.  */
		  double ascent = (double) FONT_BASE (font)
                                / FONT_HEIGHT (font);
		  x_append_stretch_glyph (it, it->object, it->pixel_width, 
					  it->ascent + it->descent, ascent);
		}
	      else
		x_append_glyph (it);

	      /* If characters with lbearing or rbearing are displayed
		 in this line, record that fact in a flag of the
		 glyph row.  This is used to optimize X output code.  */
	      if (pcm->lbearing < 0
		  || pcm->rbearing > pcm->width)
		it->glyph_row->contains_overlapping_glyphs_p = 1;
	    }
	}
      else if (it->char_to_display == '\n')
	{
	  /* A newline has no width but we need the height of the line.  */
	  it->pixel_width = 0;
	  it->nglyphs = 0;
	  it->ascent = it->phys_ascent = FONT_BASE (font) + boff;
	  it->descent = it->phys_descent = FONT_DESCENT (font) - boff;
      
	  if (face->box != FACE_NO_BOX)
	    {
	      int thick = face->box_line_width;
	      it->ascent += thick;
	      it->descent += thick;
	    }
	}
      else if (it->char_to_display == '\t')
	{
	  int tab_width = it->tab_width * CANON_X_UNIT (it->f);
	  int x = (it->current_x
		   - it->prompt_width
		   + it->continuation_lines_width);
	  int next_tab_x = ((1 + x + tab_width - 1) / tab_width) * tab_width;
      
	  it->pixel_width = next_tab_x - x;
	  it->nglyphs = 1;
	  it->ascent = it->phys_ascent = FONT_BASE (font) + boff;
	  it->descent = it->phys_descent = FONT_DESCENT (font) - boff;
	  
	  if (it->glyph_row)
	    {
	      double ascent = (double) it->ascent / (it->ascent + it->descent);
	      x_append_stretch_glyph (it, it->object, it->pixel_width, 
				      it->ascent + it->descent, ascent);
	    }
	}
      else 
	{
1911 1912
	  /* A multi-byte character.
             If we found a font, this font should give us the right
1913 1914 1915 1916 1917
             metrics.  If we didn't find a font, use the frame's
             default font and calculate the width of the character
             from the charset width; this is what old redisplay code
             did.  */
          if (font_not_found_p)
1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934
            {
              wchar_t dummy = BUILD_WCHAR_T (0, 'X');

              /* Get some metrics for the default font.  */
              pcm = w32_per_char_metric (hdc, font, &dummy, 0);

              /* Ignore the width obtained above, and use the average
                 width of a character in the default font. */
              it->pixel_width = FONT_WIDTH (font)
                * CHARSET_WIDTH (it->charset);
            }
          else
            {
              pcm = w32_per_char_metric (hdc, font, &char2b, 1);
              it->pixel_width = pcm->width;
            }

1935 1936 1937 1938 1939 1940 1941 1942 1943
          it->nglyphs = 1;
          it->ascent = FONT_BASE (font) + boff;
          it->descent = FONT_DESCENT (font) - boff;
          it->phys_ascent = pcm->ascent + boff;
          it->phys_descent = pcm->descent - boff;
          if (it->glyph_row
              && (pcm->lbearing < 0
                  || pcm->rbearing > pcm->width))
            it->glyph_row->contains_overlapping_glyphs_p = 1;
1944

1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176