| 1 | /* Functions taken directly from X sources for use with the Microsoft W32 API. |
| 2 | Copyright (C) 1989, 1992, 1993, 1994, 1995, 1999 Free Software Foundation. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include <signal.h> |
| 23 | #include <stdio.h> |
| 24 | #include "lisp.h" |
| 25 | #include "keyboard.h" |
| 26 | #include "frame.h" |
| 27 | #include "charset.h" |
| 28 | #include "fontset.h" |
| 29 | #include "blockinput.h" |
| 30 | #include "w32term.h" |
| 31 | #include "windowsx.h" |
| 32 | |
| 33 | #define myalloc(cb) GlobalAllocPtr (GPTR, cb) |
| 34 | #define myfree(lp) GlobalFreePtr (lp) |
| 35 | |
| 36 | CRITICAL_SECTION critsect; |
| 37 | extern HANDLE keyboard_handle; |
| 38 | HANDLE input_available = NULL; |
| 39 | HANDLE interrupt_handle = NULL; |
| 40 | |
| 41 | void |
| 42 | init_crit () |
| 43 | { |
| 44 | InitializeCriticalSection (&critsect); |
| 45 | |
| 46 | /* For safety, input_available should only be reset by get_next_msg |
| 47 | when the input queue is empty, so make it a manual reset event. */ |
| 48 | keyboard_handle = input_available = CreateEvent (NULL, TRUE, FALSE, NULL); |
| 49 | |
| 50 | /* interrupt_handle is signalled when quit (C-g) is detected, so that |
| 51 | blocking system calls can be interrupted. We make it a manual |
| 52 | reset event, so that if we should ever have multiple threads |
| 53 | performing system calls, they will all be interrupted (I'm guessing |
| 54 | that would the right response). Note that we use PulseEvent to |
| 55 | signal this event, so that it never remains signalled. */ |
| 56 | interrupt_handle = CreateEvent (NULL, TRUE, FALSE, NULL); |
| 57 | } |
| 58 | |
| 59 | void |
| 60 | delete_crit () |
| 61 | { |
| 62 | DeleteCriticalSection (&critsect); |
| 63 | |
| 64 | if (input_available) |
| 65 | { |
| 66 | CloseHandle (input_available); |
| 67 | input_available = NULL; |
| 68 | } |
| 69 | if (interrupt_handle) |
| 70 | { |
| 71 | CloseHandle (interrupt_handle); |
| 72 | interrupt_handle = NULL; |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | void |
| 77 | signal_quit () |
| 78 | { |
| 79 | /* Make sure this event never remains signalled; if the main thread |
| 80 | isn't in a blocking call, then this should do nothing. */ |
| 81 | PulseEvent (interrupt_handle); |
| 82 | } |
| 83 | |
| 84 | void |
| 85 | select_palette (FRAME_PTR f, HDC hdc) |
| 86 | { |
| 87 | struct w32_display_info *display_info = FRAME_W32_DISPLAY_INFO (f); |
| 88 | |
| 89 | if (!display_info->has_palette) |
| 90 | return; |
| 91 | |
| 92 | if (display_info->palette == 0) |
| 93 | return; |
| 94 | |
| 95 | if (!NILP (Vw32_enable_palette)) |
| 96 | f->output_data.w32->old_palette = |
| 97 | SelectPalette (hdc, display_info->palette, FALSE); |
| 98 | else |
| 99 | f->output_data.w32->old_palette = NULL; |
| 100 | |
| 101 | if (RealizePalette (hdc)) |
| 102 | { |
| 103 | Lisp_Object frame, framelist; |
| 104 | FOR_EACH_FRAME (framelist, frame) |
| 105 | { |
| 106 | SET_FRAME_GARBAGED (XFRAME (frame)); |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | void |
| 112 | deselect_palette (FRAME_PTR f, HDC hdc) |
| 113 | { |
| 114 | if (f->output_data.w32->old_palette) |
| 115 | SelectPalette (hdc, f->output_data.w32->old_palette, FALSE); |
| 116 | } |
| 117 | |
| 118 | /* Get a DC for frame and select palette for drawing; force an update of |
| 119 | all frames if palette's mapping changes. */ |
| 120 | HDC |
| 121 | get_frame_dc (FRAME_PTR f) |
| 122 | { |
| 123 | HDC hdc; |
| 124 | |
| 125 | if (f->output_method != output_w32) |
| 126 | abort (); |
| 127 | |
| 128 | enter_crit (); |
| 129 | |
| 130 | hdc = GetDC (f->output_data.w32->window_desc); |
| 131 | |
| 132 | /* If this gets called during startup before the frame is valid, |
| 133 | there is a chance of corrupting random data or crashing. */ |
| 134 | if (hdc) |
| 135 | select_palette (f, hdc); |
| 136 | |
| 137 | return hdc; |
| 138 | } |
| 139 | |
| 140 | int |
| 141 | release_frame_dc (FRAME_PTR f, HDC hdc) |
| 142 | { |
| 143 | int ret; |
| 144 | |
| 145 | deselect_palette (f, hdc); |
| 146 | ret = ReleaseDC (f->output_data.w32->window_desc, hdc); |
| 147 | |
| 148 | leave_crit (); |
| 149 | |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | typedef struct int_msg |
| 154 | { |
| 155 | W32Msg w32msg; |
| 156 | struct int_msg *lpNext; |
| 157 | } int_msg; |
| 158 | |
| 159 | int_msg *lpHead = NULL; |
| 160 | int_msg *lpTail = NULL; |
| 161 | int nQueue = 0; |
| 162 | |
| 163 | BOOL |
| 164 | get_next_msg (lpmsg, bWait) |
| 165 | W32Msg * lpmsg; |
| 166 | BOOL bWait; |
| 167 | { |
| 168 | BOOL bRet = FALSE; |
| 169 | |
| 170 | enter_crit (); |
| 171 | |
| 172 | /* The while loop takes care of multiple sets */ |
| 173 | |
| 174 | while (!nQueue && bWait) |
| 175 | { |
| 176 | leave_crit (); |
| 177 | WaitForSingleObject (input_available, INFINITE); |
| 178 | enter_crit (); |
| 179 | } |
| 180 | |
| 181 | if (nQueue) |
| 182 | { |
| 183 | bcopy (&(lpHead->w32msg), lpmsg, sizeof (W32Msg)); |
| 184 | |
| 185 | { |
| 186 | int_msg * lpCur = lpHead; |
| 187 | |
| 188 | lpHead = lpHead->lpNext; |
| 189 | |
| 190 | myfree (lpCur); |
| 191 | } |
| 192 | |
| 193 | nQueue--; |
| 194 | |
| 195 | bRet = TRUE; |
| 196 | } |
| 197 | |
| 198 | if (nQueue == 0) |
| 199 | ResetEvent (input_available); |
| 200 | |
| 201 | leave_crit (); |
| 202 | |
| 203 | return (bRet); |
| 204 | } |
| 205 | |
| 206 | BOOL |
| 207 | post_msg (lpmsg) |
| 208 | W32Msg * lpmsg; |
| 209 | { |
| 210 | int_msg * lpNew = (int_msg *) myalloc (sizeof (int_msg)); |
| 211 | |
| 212 | if (!lpNew) |
| 213 | return (FALSE); |
| 214 | |
| 215 | bcopy (lpmsg, &(lpNew->w32msg), sizeof (W32Msg)); |
| 216 | lpNew->lpNext = NULL; |
| 217 | |
| 218 | enter_crit (); |
| 219 | |
| 220 | if (nQueue++) |
| 221 | { |
| 222 | lpTail->lpNext = lpNew; |
| 223 | } |
| 224 | else |
| 225 | { |
| 226 | lpHead = lpNew; |
| 227 | } |
| 228 | |
| 229 | lpTail = lpNew; |
| 230 | SetEvent (input_available); |
| 231 | |
| 232 | leave_crit (); |
| 233 | |
| 234 | return (TRUE); |
| 235 | } |
| 236 | |
| 237 | BOOL |
| 238 | prepend_msg (W32Msg *lpmsg) |
| 239 | { |
| 240 | int_msg * lpNew = (int_msg *) myalloc (sizeof (int_msg)); |
| 241 | |
| 242 | if (!lpNew) |
| 243 | return (FALSE); |
| 244 | |
| 245 | bcopy (lpmsg, &(lpNew->w32msg), sizeof (W32Msg)); |
| 246 | |
| 247 | enter_crit (); |
| 248 | |
| 249 | nQueue++; |
| 250 | lpNew->lpNext = lpHead; |
| 251 | lpHead = lpNew; |
| 252 | |
| 253 | leave_crit (); |
| 254 | |
| 255 | return (TRUE); |
| 256 | } |
| 257 | |
| 258 | /* Process all messages in the current thread's queue. */ |
| 259 | void |
| 260 | drain_message_queue () |
| 261 | { |
| 262 | MSG msg; |
| 263 | while (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) |
| 264 | { |
| 265 | TranslateMessage (&msg); |
| 266 | DispatchMessage (&msg); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | |
| 271 | /* |
| 272 | * XParseGeometry parses strings of the form |
| 273 | * "=<width>x<height>{+-}<xoffset>{+-}<yoffset>", where |
| 274 | * width, height, xoffset, and yoffset are unsigned integers. |
| 275 | * Example: "=80x24+300-49" |
| 276 | * The equal sign is optional. |
| 277 | * It returns a bitmask that indicates which of the four values |
| 278 | * were actually found in the string. For each value found, |
| 279 | * the corresponding argument is updated; for each value |
| 280 | * not found, the corresponding argument is left unchanged. |
| 281 | */ |
| 282 | |
| 283 | static int |
| 284 | read_integer (string, NextString) |
| 285 | register char *string; |
| 286 | char **NextString; |
| 287 | { |
| 288 | register int Result = 0; |
| 289 | int Sign = 1; |
| 290 | |
| 291 | if (*string == '+') |
| 292 | string++; |
| 293 | else if (*string == '-') |
| 294 | { |
| 295 | string++; |
| 296 | Sign = -1; |
| 297 | } |
| 298 | for (; (*string >= '0') && (*string <= '9'); string++) |
| 299 | { |
| 300 | Result = (Result * 10) + (*string - '0'); |
| 301 | } |
| 302 | *NextString = string; |
| 303 | if (Sign >= 0) |
| 304 | return (Result); |
| 305 | else |
| 306 | return (-Result); |
| 307 | } |
| 308 | |
| 309 | int |
| 310 | XParseGeometry (string, x, y, width, height) |
| 311 | char *string; |
| 312 | int *x, *y; |
| 313 | unsigned int *width, *height; /* RETURN */ |
| 314 | { |
| 315 | int mask = NoValue; |
| 316 | register char *strind; |
| 317 | unsigned int tempWidth, tempHeight; |
| 318 | int tempX, tempY; |
| 319 | char *nextCharacter; |
| 320 | |
| 321 | if ((string == NULL) || (*string == '\0')) return (mask); |
| 322 | if (*string == '=') |
| 323 | string++; /* ignore possible '=' at beg of geometry spec */ |
| 324 | |
| 325 | strind = (char *)string; |
| 326 | if (*strind != '+' && *strind != '-' && *strind != 'x') |
| 327 | { |
| 328 | tempWidth = read_integer (strind, &nextCharacter); |
| 329 | if (strind == nextCharacter) |
| 330 | return (0); |
| 331 | strind = nextCharacter; |
| 332 | mask |= WidthValue; |
| 333 | } |
| 334 | |
| 335 | if (*strind == 'x' || *strind == 'X') |
| 336 | { |
| 337 | strind++; |
| 338 | tempHeight = read_integer (strind, &nextCharacter); |
| 339 | if (strind == nextCharacter) |
| 340 | return (0); |
| 341 | strind = nextCharacter; |
| 342 | mask |= HeightValue; |
| 343 | } |
| 344 | |
| 345 | if ((*strind == '+') || (*strind == '-')) |
| 346 | { |
| 347 | if (*strind == '-') |
| 348 | { |
| 349 | strind++; |
| 350 | tempX = -read_integer (strind, &nextCharacter); |
| 351 | if (strind == nextCharacter) |
| 352 | return (0); |
| 353 | strind = nextCharacter; |
| 354 | mask |= XNegative; |
| 355 | |
| 356 | } |
| 357 | else |
| 358 | { |
| 359 | strind++; |
| 360 | tempX = read_integer (strind, &nextCharacter); |
| 361 | if (strind == nextCharacter) |
| 362 | return (0); |
| 363 | strind = nextCharacter; |
| 364 | } |
| 365 | mask |= XValue; |
| 366 | if ((*strind == '+') || (*strind == '-')) |
| 367 | { |
| 368 | if (*strind == '-') |
| 369 | { |
| 370 | strind++; |
| 371 | tempY = -read_integer (strind, &nextCharacter); |
| 372 | if (strind == nextCharacter) |
| 373 | return (0); |
| 374 | strind = nextCharacter; |
| 375 | mask |= YNegative; |
| 376 | |
| 377 | } |
| 378 | else |
| 379 | { |
| 380 | strind++; |
| 381 | tempY = read_integer (strind, &nextCharacter); |
| 382 | if (strind == nextCharacter) |
| 383 | return (0); |
| 384 | strind = nextCharacter; |
| 385 | } |
| 386 | mask |= YValue; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | /* If strind isn't at the end of the string the it's an invalid |
| 391 | geometry specification. */ |
| 392 | |
| 393 | if (*strind != '\0') return (0); |
| 394 | |
| 395 | if (mask & XValue) |
| 396 | *x = tempX; |
| 397 | if (mask & YValue) |
| 398 | *y = tempY; |
| 399 | if (mask & WidthValue) |
| 400 | *width = tempWidth; |
| 401 | if (mask & HeightValue) |
| 402 | *height = tempHeight; |
| 403 | return (mask); |
| 404 | } |
| 405 | |
| 406 | /* x_sync is a no-op on W32. */ |
| 407 | void |
| 408 | x_sync (f) |
| 409 | void *f; |
| 410 | { |
| 411 | } |