w32term.c 323 KB
Newer Older
1
/* Implementation of GUI terminal on the Microsoft W32 API.
2
   Copyright (C) 1989, 93, 94, 95, 96, 1997, 1998, 1999, 2000, 2001
3
   Free Software Foundation, Inc.
Geoff Voelker's avatar
Geoff Voelker committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17

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
18 19
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Karl Heuer's avatar
Karl Heuer committed
20
Boston, MA 02111-1307, USA.  */
Geoff Voelker's avatar
Geoff Voelker committed
21 22

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

#include "systty.h"
#include "systime.h"
37
#include "atimer.h"
Stefan Monnier's avatar
Stefan Monnier committed
38
#include "keymap.h"
Geoff Voelker's avatar
Geoff Voelker committed
39 40 41 42 43 44

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

45
#include "keyboard.h"
Geoff Voelker's avatar
Geoff Voelker committed
46 47
#include "frame.h"
#include "dispextern.h"
48
#include "fontset.h"
Geoff Voelker's avatar
Geoff Voelker committed
49 50 51 52 53 54 55 56
#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"
#include "gnu.h"
#include "disptab.h"
#include "buffer.h"
#include "window.h"
#include "intervals.h"
57
#include "composite.h"
58
#include "coding.h"
Geoff Voelker's avatar
Geoff Voelker committed
59

60 61 62 63 64
#define abs(x)	((x) < 0 ? -(x) : (x))

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


Kim F. Storm's avatar
Kim F. Storm committed
65
/* Fringe bitmaps.  */
66

Kim F. Storm's avatar
Kim F. Storm committed
67
enum fringe_bitmap_type
68
{
Kim F. Storm's avatar
Kim F. Storm committed
69
  NO_FRINGE_BITMAP,
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
  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
87 88
#define zv_height 72
#define zv_period 3
89
static unsigned short zv_bits[] = {
90 91 92 93 94 95 96 97
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00};
98
static HBITMAP zv_bmp;
99 100 101 102 103 104 105

/* 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};
106
static HBITMAP left_bmp;
107 108 109 110 111 112 113

/* 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};
114
static HBITMAP right_bmp;
115 116 117 118 119 120 121

/* 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};
122
static HBITMAP continued_bmp;
123 124 125 126 127 128 129

/* 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};
130
static HBITMAP continuation_bmp;
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146

/* 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
147
static HBITMAP ov_bmp;
148 149 150 151

extern Lisp_Object Qhelp_echo;


152
/* Non-nil means Emacs uses toolkit scroll bars.  */
153

154
Lisp_Object Vx_toolkit_scroll_bars;
155 156 157

/* If a string, w32_read_socket generates an event to display that string.
   (The display is done in read_char.)  */
158

159
static Lisp_Object help_echo;
160
static Lisp_Object help_echo_window;
161 162
static Lisp_Object help_echo_object;
static int help_echo_pos;
163

164
/* Temporary variables for w32_read_socket.  */
165 166

static Lisp_Object previous_help_echo;
167 168
static int last_mousemove_x = 0;
static int last_mousemove_y = 0;
169 170 171 172 173 174

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

static int any_help_event_p;

175 176
/* Non-zero means autoselect window with the mouse cursor.  */

177
int mouse_autoselect_window;
178

179 180 181 182 183 184
/* 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;

185 186 187 188
/* Non-zero means make use of UNDERLINE_POSITION font properties.  */

int x_use_underline_position_properties;

Geoff Voelker's avatar
Geoff Voelker committed
189 190
extern unsigned int msh_mousewheel;

Geoff Voelker's avatar
Geoff Voelker committed
191 192
extern void free_frame_menubar ();

193 194
extern int w32_codepage_for_font (char *fontname);

195 196
extern glyph_metric *w32_BDF_TextMetric(bdffont *fontp,
					unsigned char *text, int dim);
Geoff Voelker's avatar
Geoff Voelker committed
197 198
extern Lisp_Object Vwindow_system;

Geoff Voelker's avatar
Geoff Voelker committed
199 200 201 202
#define x_any_window_to_frame x_window_to_frame
#define x_top_window_to_frame x_window_to_frame


203 204
/* This is display since w32 does not support multiple ones.  */
struct w32_display_info one_w32_display_info;
Andrew Innes's avatar
Andrew Innes committed
205
struct w32_display_info *x_display_list;
Geoff Voelker's avatar
Geoff Voelker committed
206 207

/* This is a list of cons cells, each of the form (NAME . FONT-LIST-CACHE),
208
   one for each element of w32_display_list and in the same order.
Geoff Voelker's avatar
Geoff Voelker committed
209 210
   NAME is the name of the frame.
   FONT-LIST-CACHE records previous values returned by x-list-fonts.  */
211
Lisp_Object w32_display_name_list;
Geoff Voelker's avatar
Geoff Voelker committed
212 213 214

/* Frame being updated by update_frame.  This is declared in term.c.
   This is set by update_begin and looked at by all the
215
   w32 functions.  It is zero while not inside an update.
216
   In that case, the w32 functions assume that `SELECTED_FRAME ()'
Geoff Voelker's avatar
Geoff Voelker committed
217 218 219 220 221 222 223
   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.
224 225
   HPOS and VPOS are window relative glyph matrix coordinates.
   X and Y are window relative pixel coordinates.  */
Geoff Voelker's avatar
Geoff Voelker committed
226

227
struct cursor_pos output_cursor;
Geoff Voelker's avatar
Geoff Voelker committed
228

229 230 231 232 233
/* The handle of the frame that currently owns the system caret.  */
HWND w32_system_caret_hwnd;
int w32_system_caret_height;
int w32_system_caret_x;
int w32_system_caret_y;
234
int w32_use_visible_system_caret;
235

236
/* Flag to enable Unicode output in case users wish to use programs
237 238
   like Twinbridge on '95 rather than installed system level support
   for Far East languages.  */
239
int w32_enable_unicode_output;
240

241 242
DWORD dwWindowsThreadId = 0;
HANDLE hWindowsThread = NULL;
Geoff Voelker's avatar
Geoff Voelker committed
243 244 245
DWORD dwMainThreadId = 0;
HANDLE hMainThread = NULL;

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
#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
278 279 280
/* Mouse movement. */

/* Where the mouse was last time we reported a mouse event.  */
281

282
FRAME_PTR last_mouse_frame;
Geoff Voelker's avatar
Geoff Voelker committed
283
static RECT last_mouse_glyph;
284
static Lisp_Object last_mouse_press_frame;
Geoff Voelker's avatar
Geoff Voelker committed
285

286
Lisp_Object Vw32_num_mouse_buttons;
Geoff Voelker's avatar
Geoff Voelker committed
287

288
Lisp_Object Vw32_swap_mouse_buttons;
Geoff Voelker's avatar
Geoff Voelker committed
289

290 291 292 293 294 295
/* 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;

296 297 298
/* Control whether right-alt and left-ctrl should be recognized as AltGr.  */
Lisp_Object Vw32_recognize_altgr;

Geoff Voelker's avatar
Geoff Voelker committed
299 300 301
/* The scroll bar in which the last motion event occurred.

   If the last motion event occurred in a scroll bar, we set this
302
   so w32_mouse_position can know whether to report a scroll bar motion or
Geoff Voelker's avatar
Geoff Voelker committed
303 304 305
   an ordinary motion.

   If the last motion event didn't occur in a scroll bar, we set this
306
   to Qnil, to tell w32_mouse_position to return an ordinary motion event.  */
307 308
static Lisp_Object last_mouse_scroll_bar;
static int last_mouse_scroll_bar_pos;
Geoff Voelker's avatar
Geoff Voelker committed
309

310
/* This is a hack.  We would really prefer that w32_mouse_position would
Geoff Voelker's avatar
Geoff Voelker committed
311
   return the time associated with the position it returns, but there
312
   doesn't seem to be any way to wrest the time-stamp from the server
Geoff Voelker's avatar
Geoff Voelker committed
313 314 315 316
   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.  */

317 318 319 320
static Time last_mouse_movement_time;

/* Incremented by w32_read_socket whenever it really tries to read
   events.  */
321

Geoff Voelker's avatar
Geoff Voelker committed
322 323 324 325 326 327 328 329 330 331
#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;

332
#ifndef USE_CRT_DLL
Geoff Voelker's avatar
Geoff Voelker committed
333
extern int errno;
334
#endif
Geoff Voelker's avatar
Geoff Voelker committed
335 336

/* A mask of extra modifier bits to put into every keyboard char.  */
337

338
extern EMACS_INT extra_keyboard_modifiers;
Geoff Voelker's avatar
Geoff Voelker committed
339

340 341 342 343 344 345 346 347 348 349 350 351 352
/* 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
};

353
static void x_update_window_end P_ ((struct window *, int, int));
354 355 356
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 *,
357 358 359
				   int *, int *, Lisp_Object));
static int fast_find_string_pos P_ ((struct window *, int, Lisp_Object,
				     int *, int *, int *, int *, int));
360 361
static void set_output_cursor P_ ((struct cursor_pos *));
static struct glyph *x_y_to_hpos_vpos P_ ((struct window *, int, int,
362
					   int *, int *, int *, int));
363 364 365 366 367 368 369
static void note_mode_line_highlight P_ ((struct window *, int, int));
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));
370 371
static int cursor_in_mouse_face_p P_ ((struct window *));
static int clear_mouse_face P_ ((struct w32_display_info *));
372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396

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_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 *));
397 398
static void x_new_focus_frame P_ ((struct w32_display_info *,
				   struct frame *));
399 400 401
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 *));
402 403
static void x_draw_bar_cursor P_ ((struct window *, struct glyph_row *, int,
				   enum text_cursor_kinds));
404
static void expose_frame P_ ((struct frame *, int, int, int, int));
405
static int expose_window_tree P_ ((struct window *, RECT *));
406 407
static void expose_overlaps P_ ((struct window *, struct glyph_row *,
				 struct glyph_row *));
408
static int expose_window P_ ((struct window *, RECT *));
409 410
static void expose_area P_ ((struct window *, struct glyph_row *,
			     RECT *, enum glyph_row_area));
411 412
static int expose_line P_ ((struct window *, struct glyph_row *,
			    RECT *));
413 414 415 416 417 418
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));
419
static void w32_draw_fringe_bitmap P_ ((struct window *, HDC hdc,
420
					struct glyph_row *,
421
					enum fringe_bitmap_type, int left_p));
422 423
static void w32_clip_to_row P_ ((struct window *, struct glyph_row *,
                                 HDC, int));
424
static int x_phys_cursor_in_rect_p P_ ((struct window *, RECT *));
425 426 427 428 429
static void x_draw_row_fringe_bitmaps P_ ((struct window *,
					   struct glyph_row *));
static void notice_overwritten_cursor P_ ((struct window *,
					   enum glyph_row_area,
					   int, int, int, int));
430

Geoff Voelker's avatar
Geoff Voelker committed
431 432 433
static Lisp_Object Qvendor_specific_keysyms;


434 435 436 437
/***********************************************************************
			      Debugging
 ***********************************************************************/

Geoff Voelker's avatar
Geoff Voelker committed
438
#if 0
439 440 441

/* This is a function useful for recording debugging information about
   the sequence of occurrences in this file.  */
Geoff Voelker's avatar
Geoff Voelker committed
442

443
struct record
Geoff Voelker's avatar
Geoff Voelker committed
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466
{
  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 */

467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531

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);
}

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);
}


/* 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. */
532
void
533
w32_fill_rect (f, hdc, pix, lprect)
Geoff Voelker's avatar
Geoff Voelker committed
534
     FRAME_PTR f;
535
     HDC hdc;
Geoff Voelker's avatar
Geoff Voelker committed
536 537 538 539
     COLORREF pix;
     RECT * lprect;
{
  HBRUSH hb;
540

Geoff Voelker's avatar
Geoff Voelker committed
541 542 543 544 545
  hb = CreateSolidBrush (pix);
  FillRect (hdc, lprect, hb);
  DeleteObject (hb);
}

546
void
547
w32_clear_window (f)
Geoff Voelker's avatar
Geoff Voelker committed
548 549 550
     FRAME_PTR f;
{
  RECT rect;
551
  HDC hdc = get_frame_dc (f);
Geoff Voelker's avatar
Geoff Voelker committed
552

553 554 555 556 557 558 559 560 561
  /* Under certain conditions, this can be called at startup with
     a console frame pointer before the GUI frame is created. An HDC
     of 0 indicates this. */
  if (hdc)
    {
      GetClientRect (FRAME_W32_WINDOW (f), &rect);
      w32_clear_rect (f, hdc, &rect);
    }

562
  release_frame_dc (f, hdc);
Geoff Voelker's avatar
Geoff Voelker committed
563 564 565
}


566 567 568
/***********************************************************************
		    Starting and ending an update
 ***********************************************************************/
569

570 571 572
/* 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
573
   each window being updated.  */
Geoff Voelker's avatar
Geoff Voelker committed
574

575
static void
576
x_update_begin (f)
Geoff Voelker's avatar
Geoff Voelker committed
577 578
     struct frame *f;
{
579 580
  struct w32_display_info *display_info = FRAME_W32_DISPLAY_INFO (f);

Andrew Innes's avatar
Andrew Innes committed
581 582 583
  if (! FRAME_W32_P (f))
    return;

584 585 586 587 588 589 590
  /* Regenerate display palette before drawing if list of requested
     colors has changed. */
  if (display_info->regen_palette)
  {
    w32_regenerate_palette (f);
    display_info->regen_palette = FALSE;
  }
591
}
Geoff Voelker's avatar
Geoff Voelker committed
592

593 594 595 596 597 598 599 600 601 602 603 604

/* 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);

605
  /* Hide the system caret during an update.  */
606 607
  if (w32_use_visible_system_caret)
    SendMessage (w32_system_caret_hwnd, WM_EMACS_HIDE_CARET, 0, 0);
608

609 610
  updated_window = w;
  set_output_cursor (&w->cursor);
Geoff Voelker's avatar
Geoff Voelker committed
611 612 613

  BLOCK_INPUT;

614
  if (f == display_info->mouse_face_mouse_frame)
Geoff Voelker's avatar
Geoff Voelker committed
615 616
    {
      /* Don't do highlighting for mouse motion during the update.  */
617
      display_info->mouse_face_defer = 1;
Geoff Voelker's avatar
Geoff Voelker committed
618

619 620
      /* If F needs to be redrawn, simply forget about any prior mouse
	 highlighting.  */
Geoff Voelker's avatar
Geoff Voelker committed
621
      if (FRAME_GARBAGED_P (f))
622 623
	display_info->mouse_face_window = Qnil;

624 625 626 627 628 629
#if 0 /* Rows in a current matrix containing glyphs in mouse-face have
	 their mouse_face_p flag set, which means that they are always
	 unequal to rows in a desired matrix which never have that
	 flag set.  So, rows containing mouse-face glyphs are never
	 scrolled, and we don't have to switch the mouse highlight off
	 here to prevent it from being scrolled.  */
630

631 632 633 634 635 636 637
      /* 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
638
	{
639
	  int i;
Geoff Voelker's avatar
Geoff Voelker committed
640

641 642
          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
643 644
	      break;

645 646
	  if (i < w->desired_matrix->nrows)
	    clear_mouse_face (display_info);
Geoff Voelker's avatar
Geoff Voelker committed
647
	}
648
#endif /* 0 */
Geoff Voelker's avatar
Geoff Voelker committed
649 650 651 652 653
    }

  UNBLOCK_INPUT;
}

654 655 656 657

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

658
static void
659 660
x_draw_vertical_border (w)
     struct window *w;
Geoff Voelker's avatar
Geoff Voelker committed
661
{
662
  struct frame *f = XFRAME (WINDOW_FRAME (w));
663

664 665 666 667 668 669 670 671
  /* 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;
672
      HDC hdc;
Geoff Voelker's avatar
Geoff Voelker committed
673

674 675
      window_box_edges (w, -1, (int *) &r.left, (int *) &r.top,
			(int *) &r.right, (int *) &r.bottom);
Kim F. Storm's avatar
Kim F. Storm committed
676
      r.left = r.right + FRAME_X_RIGHT_FRINGE_WIDTH (f);
677 678
      r.right = r.left + 1;
      r.bottom -= 1;
Geoff Voelker's avatar
Geoff Voelker committed
679

680
      hdc = get_frame_dc (f);
681
      w32_fill_rect (f, hdc, FRAME_FOREGROUND_PIXEL (f), &r);
682
      release_frame_dc (f, hdc);
683 684
    }
}
Geoff Voelker's avatar
Geoff Voelker committed
685

686

687 688 689 690 691 692 693 694 695 696 697 698
/* 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.

   MOUSE_FACE_OVERWRITTEN_P non-zero means that some row containing
   glyphs in mouse-face were overwritten.  In that case we have to
   make sure that the mouse-highlight is properly redrawn.

   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. */
699 700

static void
701
x_update_window_end (w, cursor_on_p, mouse_face_overwritten_p)
702
     struct window *w;
703
     int cursor_on_p, mouse_face_overwritten_p;
704
{
705 706 707
  struct w32_display_info *dpyinfo
    = FRAME_W32_DISPLAY_INFO (XFRAME (w->frame));

708 709 710
  if (!w->pseudo_window_p)
    {
      BLOCK_INPUT;
711

712 713 714 715
      if (cursor_on_p)
	x_display_and_set_cursor (w, 1, output_cursor.hpos,
				  output_cursor.vpos,
				  output_cursor.x, output_cursor.y);
716

717 718 719
      x_draw_vertical_border (w);
      UNBLOCK_INPUT;
    }
720 721 722 723 724 725 726 727 728 729

  /* If a row with mouse-face was overwritten, arrange for
     XTframe_up_to_date to redisplay the mouse highlight.  */
  if (mouse_face_overwritten_p)
    {
      dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1;
      dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1;
      dpyinfo->mouse_face_window = Qnil;
    }

730 731 732
  /* Unhide the caret.  This won't actually show the cursor, unless it
     was visible before the corresponding call to HideCaret in
     x_update_window_begin.  */
733 734
  if (w32_use_visible_system_caret)
    SendMessage (w32_system_caret_hwnd, WM_EMACS_SHOW_CARET, 0, 0);
735

736 737 738
  updated_window = NULL;
}

739 740 741 742

/* End update of frame F.  This function is installed as a hook in
   update_end.  */

743 744 745 746
static void
x_update_end (f)
     struct frame *f;
{
Andrew Innes's avatar
Andrew Innes committed
747 748 749
  if (! FRAME_W32_P (f))
    return;

750 751
  /* Mouse highlight may be displayed again.  */
  FRAME_W32_DISPLAY_INFO (f)->mouse_face_defer = 0;
Geoff Voelker's avatar
Geoff Voelker committed
752 753
}

754

755 756 757
/* 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
758

759
static void
760
w32_frame_up_to_date (f)
761
     struct frame *f;
Geoff Voelker's avatar
Geoff Voelker committed
762
{
763
  if (FRAME_W32_P (f))
Geoff Voelker's avatar
Geoff Voelker committed
764
    {
765 766 767 768 769 770 771 772 773 774 775 776
      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
777 778
    }
}
779 780 781


/* Draw truncation mark bitmaps, continuation mark bitmaps, overlay
Kim F. Storm's avatar
Kim F. Storm committed
782
   arrow bitmaps, or clear the fringes if no bitmaps are required
783
   before DESIRED_ROW is made current.  The window being updated is
784
   found in updated_window.  This function is called from
785 786 787 788 789 790 791 792
   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;
793 794 795
  struct frame *f;
  int width, height;

796
  xassert (w);
797

798 799 800
  if (!desired_row->mode_line_p && !w->pseudo_window_p)
    {
      BLOCK_INPUT;
Kim F. Storm's avatar
Kim F. Storm committed
801
      x_draw_row_fringe_bitmaps (w, desired_row);
802 803
      UNBLOCK_INPUT;
    }
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
  /* When a window has disappeared, make sure that no rest of
     full-width rows stays visible in the internal border.  Could
     check here if updated_window is the leftmost/rightmost window,
     but I guess it's not worth doing since vertically split windows
     are almost never used, internal border is rarely set, and the
     overhead is very small.  */
  if (windows_or_buffers_changed
      && desired_row->full_width_p
      && (f = XFRAME (w->frame),
	  width = FRAME_INTERNAL_BORDER_WIDTH (f),
	  width != 0)
      && (height = desired_row->visible_height,
	  height > 0))
    {
      int y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, desired_row->y));
      /* Internal border is drawn below the tool bar.  */
      if (WINDOWP (f->tool_bar_window)
	  && w == XWINDOW (f->tool_bar_window))
	y -= width;

      BLOCK_INPUT;
      {
	HDC hdc = get_frame_dc (f);
	w32_clear_area (f, hdc, 0, y, width, height);
	w32_clear_area (f, hdc, f->output_data.w32->pixel_width - width,
			y, width, height);
	release_frame_dc (f, hdc);
      }
833 834 835 836 837
      UNBLOCK_INPUT;
    }
}


Kim F. Storm's avatar
Kim F. Storm committed
838
/* Draw the bitmap WHICH in one of the left or right fringes of
839 840 841 842 843
   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
844
w32_draw_fringe_bitmap (w, hdc, row, which, left_p)
845
     struct window *w;
846
     HDC hdc;
847
     struct glyph_row *row;
Kim F. Storm's avatar
Kim F. Storm committed
848
     enum fringe_bitmap_type which;
849
     int left_p;
850 851 852 853
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  HDC compat_hdc;
  int x, y, wd, h, dy;
854
  int b1, b2;
855 856 857 858 859 860 861
  HBITMAP pixmap;
  HANDLE horig_obj;
  struct face *face;

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

862 863 864
  /* Convert row to frame coordinates.  */
  y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y);

865 866
  switch (which)
    {
867 868 869 870 871
    case NO_FRINGE_BITMAP:
      wd = 0;
      h = 0;
      break;

872 873 874
    case LEFT_TRUNCATION_BITMAP:
      wd = left_width;
      h = left_height;
875
      pixmap = left_bmp;
876
      break;
877

878 879 880
    case OVERLAY_ARROW_BITMAP:
      wd = ov_width;
      h = ov_height;
881
      pixmap = ov_bmp;
882
      break;
883

884 885 886
    case RIGHT_TRUNCATION_BITMAP:
      wd = right_width;
      h = right_height;
887
      pixmap = right_bmp;
888 889 890 891 892
      break;

    case CONTINUED_LINE_BITMAP:
      wd = continued_width;
      h = continued_height;
893
      pixmap = continued_bmp;
894
      break;
895

896 897 898
    case CONTINUATION_LINE_BITMAP:
      wd = continuation_width;
      h = continuation_height;
899
      pixmap = continuation_bmp;
900 901 902 903
      break;

    case ZV_LINE_BITMAP:
      wd = zv_width;
904
      h = zv_height - (y % zv_period);
905
      pixmap = zv_bmp;
906 907 908 909 910 911
      break;

    default:
      abort ();
    }

912 913 914 915 916
  /* Clip bitmap if too high.  */
  if (h > row->height)
    h = row->height;

  /* Set dy to the offset in the row to start drawing the bitmap.  */
917 918
  dy = (row->height - h) / 2;

919
  /* Draw the bitmap.  */
Kim F. Storm's avatar
Kim F. Storm committed
920
  face = FACE_FROM_ID (f, FRINGE_FACE_ID);
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
  PREPARE_FACE_FOR_DISPLAY (f, face);

  /* Clear left fringe if no bitmap to draw or if bitmap doesn't fill
     the fringe.  */
  b1 = -1;
  if (left_p)
    {
      if (wd > FRAME_X_LEFT_FRINGE_WIDTH (f))
	wd = FRAME_X_LEFT_FRINGE_WIDTH (f);
      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
	   - wd
	   - (FRAME_X_LEFT_FRINGE_WIDTH (f) - wd) / 2);
      if (wd < FRAME_X_LEFT_FRINGE_WIDTH (f) || row->height > h)
	{
	  /* 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);
	  b1 = (window_box_left (w, -1)
		- FRAME_X_LEFT_FRINGE_WIDTH (f)
		+ border);
	  b2 = (FRAME_X_LEFT_FRINGE_WIDTH (f) - border);
	}
    }
  else
    {
      if (wd > FRAME_X_RIGHT_FRINGE_WIDTH (f))
	wd = FRAME_X_RIGHT_FRINGE_WIDTH (f);
      x = (window_box_right (w, -1)
	   + (FRAME_X_RIGHT_FRINGE_WIDTH (f) - wd) / 2);
      /* Clear right fringe if no bitmap to draw of if bitmap doesn't fill
	 the fringe.  */
      if (wd < FRAME_X_RIGHT_FRINGE_WIDTH (f) || row->height > h)
	{
	  b1 = window_box_right (w, -1);
	  b2 = FRAME_X_RIGHT_FRINGE_WIDTH (f);
	}
    }

  if (b1 >= 0)
    {
      int header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w);
963

964 965 966 967 968 969 970 971 972 973
      w32_fill_area (f, hdc, face->background,
                     b1,
                     WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
                                                      row->y)),
                     b2,
                     row->visible_height);
    }

  if (which == NO_FRINGE_BITMAP)
    return;
974 975 976

  compat_hdc = CreateCompatibleDC (hdc);
  SaveDC (hdc);
977

978
  horig_obj = SelectObject (compat_hdc, pixmap);
979 980 981
  SetTextColor (hdc, face->background);
  SetBkColor (hdc, face->foreground);

982 983 984
  BitBlt (hdc, x, y + dy, wd, h, compat_hdc, 0,
	  (which == ZV_LINE_BITMAP ? (row->y % zv_period) : 0),
	  SRCCOPY);
985

986 987 988 989 990 991
  SelectObject (compat_hdc, horig_obj);
  DeleteDC (compat_hdc);
  RestoreDC (hdc, -1);
}


Kim F. Storm's avatar
Kim F. Storm committed
992
/* Draw fringe bitmaps for glyph row ROW on window W.  Call this
993 994 995
   function with input blocked.  */

static void
Kim F. Storm's avatar
Kim F. Storm committed
996
x_draw_row_fringe_bitmaps (w, row)
997 998 999 1000
     struct window *w;
     struct glyph_row *row;
{
  struct frame *f = XFRAME (w->frame);
Kim F. Storm's avatar
Kim F. Storm committed
1001
  enum fringe_bitmap_type bitmap;
1002
  HDC hdc;
1003 1004 1005 1006 1007 1008 1009 1010

  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;

1011 1012
  hdc = get_frame_dc (f);

1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
  if (FRAME_X_LEFT_FRINGE_WIDTH (f) != 0)
    {
      /* Decide which bitmap to draw in the left fringe.  */
      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_FRINGE_BITMAP;
1026

1027 1028
      w32_draw_fringe_bitmap (w, hdc, row, bitmap, 1);
    }
1029

1030
  if (FRAME_X_RIGHT_FRINGE_WIDTH (f) != 0)
1031
    {
1032 1033 1034 1035 1036 1037 1038 1039 1040
      /* Decide which bitmap to draw in the right fringe.  */
      if (row->truncated_on_right_p)
	bitmap = RIGHT_TRUNCATION_BITMAP;
      else if (row->continued_p)
	bitmap = CONTINUED_LINE_BITMAP;
      else if (row->indicate_empty_line_p && FRAME_X_LEFT_FRINGE_WIDTH (f) == 0)
	bitmap = ZV_LINE_BITMAP;
      else
	bitmap = NO_FRINGE_BITMAP;
1041

1042
      w32_draw_fringe_bitmap (w, hdc, row, bitmap, 0);
1043 1044 1045 1046 1047
    }

  release_frame_dc (f, hdc);
}

Geoff Voelker's avatar
Geoff Voelker committed
1048

1049 1050 1051 1052
/* This is called 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).  */
Geoff Voelker's avatar
Geoff Voelker committed
1053

1054 1055
static void
w32_set_terminal_modes (void)
Geoff Voelker's avatar
Geoff Voelker committed
1056 1057 1058
{
}

1059 1060
/* This is called when exiting or suspending Emacs. Exiting will make
   the W32 windows go away, and suspending requires no action. */
Geoff Voelker's avatar
Geoff Voelker committed
1061

1062 1063
static void
w32_reset_terminal_modes (void)
Geoff Voelker's avatar
Geoff Voelker committed
1064 1065
{
}
1066

1067

Geoff Voelker's avatar
Geoff Voelker committed
1068

1069 1070 1071 1072 1073 1074
/***********************************************************************
			    Output Cursor
 ***********************************************************************/

/* Set the global variable output_cursor to CURSOR.  All cursor
   positions are relative to updated_window.  */
1075

1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
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.
1091

1092 1093 1094 1095
   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
1096

1097
static void
1098 1099
w32_cursor_to (vpos, hpos, y, x)
     int vpos, hpos, y, x;
Geoff Voelker's avatar
Geoff Voelker committed
1100
{
1101
  struct window *w;
Geoff Voelker's avatar
Geoff Voelker committed
1102

1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113
  /* 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
1114

1115 1116 1117
  /* 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
1118 1119
    {
      BLOCK_INPUT;
1120
      x_display_cursor (w, 1, hpos, vpos, x, y);
Geoff Voelker's avatar
Geoff Voelker committed
1121 1122 1123
      UNBLOCK_INPUT;
    }
}
1124

1125

1126

1127 1128 1129 1130 1131 1132 1133 1134
/***********************************************************************
			   Display Iterator
 ***********************************************************************/

/* Function prototypes of this page.  */

static struct face *x_get_glyph_face_and_encoding P_ ((struct frame *,
						       struct glyph *,
1135 1136
						       wchar_t *,
                                                       int *));
1137 1138
static struct face *x_get_char_face_and_encoding P_ ((struct frame *, int,
						      int, wchar_t *, int));
1139
static XCharStruct *w32_per_char_metric P_ ((XFontStruct *,
1140 1141 1142 1143
                                             wchar_t *,
                                             enum w32_char_font_type));
static enum w32_char_font_type
  w32_encode_char P_ ((int, wchar_t *, struct font_info *, int *));
1144 1145 1146 1147 1148 1149
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));
1150 1151


1152 1153 1154
/* 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)))
1155 1156


1157 1158
#define BYTE1(ch) \
 (((ch) & 0xff00) >> 8)
1159

1160 1161
#define BYTE2(ch) \
 ((ch) & 0x00ff)
1162

1163 1164 1165

/* Get metrics of character CHAR2B in FONT.  Value is always non-null.
   If CHAR2B is not contained in FONT, the font's default character
1166
   metric is returned. */
1167

1168 1169
static int
w32_bdf_per_char_metric (font, char2b, dim, pcm)
1170 1171 1172
     XFontStruct *font;
     wchar_t *char2b;
     int dim;
1173
     XCharStruct * pcm;
1174 1175 1176 1177 1178
{
  glyph_metric * bdf_metric;
  char buf[2];

  if (dim == 1)
1179
    buf[0] = (char)(*char2b);
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
  else
    {
      buf[0] = BYTE1 (*char2b);
      buf[1] = BYTE2 (*char2b);
    }

  bdf_metric = w32_BDF_TextMetric (font->bdf, buf, dim);

  if (bdf_metric)
    {
      pcm->width = bdf_metric->dwidth;
      pcm->lbearing = bdf_metric->bbox;
      pcm->rbearing = bdf_metric->dwidth
                    - (bdf_metric->bbox + bdf_metric->bbw);
      pcm->ascent = bdf_metric->bboy + bdf_metric->bbh;
1195
      pcm->descent = -bdf_metric->bboy;
1196 1197

      return 1;
1198
    }
1199
  return 0;
1200 1201 1202
}


1203 1204
static int
w32_native_per_char_metric (font, char2b, font_type, pcm)
1205 1206
     XFontStruct *font;
     wchar_t *char2b;
1207
     enum w32_char_font_type font_type;
1208
     XCharStruct * pcm;
1209
{
1210 1211 1212
  HDC hdc = GetDC (NULL);
  HFONT old_font;
  BOOL retval = FALSE;
1213

1214
  xassert (font && char2b);
1215 1216
  xassert (font->hfont);
  xassert (font_type == UNICODE_FONT || font_type == ANSI_FONT);
1217

1218
  old_font = SelectObject (hdc, font->hfont);
1219

1220
  if ((font->tm.tmPitchAndFamily & TMPF_TRUETYPE) != 0)
1221
    {
1222 1223 1224 1225
      ABC char_widths;

      if (font_type == UNICODE_FONT)
	retval = GetCharABCWidthsW (hdc, *char2b, *char2b, &char_widths);
1226
      else
1227 1228 1229 1230
	retval = GetCharABCWidthsA (hdc, *char2b, *char2b, &char_widths);

      if (retval)
	{
1231 1232 1233 1234
#if 0
	  /* Disabled until we can find a way to get the right results
	     on all versions of Windows.  */

1235 1236 1237 1238
	  /* Don't trust the ABC widths.  For synthesized fonts they are
	     wrong, and so is the result of GetCharWidth()!  */
	  int real_width;
	  GetCharWidth (hdc, *char2b, *char2b, &real_width);