| 1 | /* Fringe handling (split from xdisp.c). |
| 2 | Copyright (C) 1985-1988, 1993-1995, 1997-2011 Free Software Foundation, Inc. |
| 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 3 of the License, or |
| 9 | (at your option) 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. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <config.h> |
| 20 | #include <stdio.h> |
| 21 | #include <setjmp.h> |
| 22 | |
| 23 | #include "lisp.h" |
| 24 | #include "frame.h" |
| 25 | #include "window.h" |
| 26 | #include "dispextern.h" |
| 27 | #include "buffer.h" |
| 28 | #include "blockinput.h" |
| 29 | #include "termhooks.h" |
| 30 | |
| 31 | #ifdef HAVE_WINDOW_SYSTEM |
| 32 | |
| 33 | /* Fringe bitmaps are represented in three different ways: |
| 34 | |
| 35 | Logical bitmaps are used internally to denote things like |
| 36 | 'end-of-buffer', 'left-truncation', 'overlay-arrow', etc. |
| 37 | |
| 38 | Physical bitmaps specify the visual appearence of the bitmap, |
| 39 | e.g. 'bottom-left-angle', 'left-arrow', 'left-triangle', etc. |
| 40 | User defined bitmaps are physical bitmaps. |
| 41 | |
| 42 | Internally, fringe bitmaps for a specific display row are |
| 43 | represented as a simple integer that is used as an index |
| 44 | into the table of all defined bitmaps. This index is stored |
| 45 | in the `fringe' property of the physical bitmap symbol. |
| 46 | |
| 47 | Logical bitmaps are mapped to physical bitmaps through the |
| 48 | buffer-local `fringe-indicator-alist' variable. |
| 49 | |
| 50 | Each element of this alist is a cons (LOGICAL . PHYSICAL) |
| 51 | mapping a logical bitmap to a physical bitmap. |
| 52 | PHYSICAL is either a symbol to use in both left and right fringe, |
| 53 | or a cons of two symbols (LEFT . RIGHT) denoting different |
| 54 | bitmaps to use in left and right fringe. |
| 55 | |
| 56 | LOGICAL is first looked up in the window's buffer's buffer-local |
| 57 | value of the fringe-indicator-alist variable, and if not present, |
| 58 | in the global value of fringe-indicator-alist. |
| 59 | |
| 60 | If LOGICAL is not present in either alist, or the PHYSICAL value |
| 61 | found is nil, no bitmap is shown for the logical bitmap. |
| 62 | |
| 63 | The `left-fringe' and `right-fringe' display properties |
| 64 | must specify physical bitmap symbols. |
| 65 | */ |
| 66 | |
| 67 | static Lisp_Object Qtruncation, Qcontinuation, Qoverlay_arrow; |
| 68 | static Lisp_Object Qempty_line, Qtop_bottom; |
| 69 | static Lisp_Object Qhollow_small; |
| 70 | |
| 71 | enum fringe_bitmap_align |
| 72 | { |
| 73 | ALIGN_BITMAP_CENTER = 0, |
| 74 | ALIGN_BITMAP_TOP, |
| 75 | ALIGN_BITMAP_BOTTOM |
| 76 | }; |
| 77 | |
| 78 | struct fringe_bitmap |
| 79 | { |
| 80 | unsigned short *bits; |
| 81 | unsigned height : 8; |
| 82 | unsigned width : 8; |
| 83 | unsigned period : 8; |
| 84 | unsigned align : 2; |
| 85 | unsigned dynamic : 1; |
| 86 | }; |
| 87 | |
| 88 | \f |
| 89 | /*********************************************************************** |
| 90 | Fringe bitmaps |
| 91 | ***********************************************************************/ |
| 92 | |
| 93 | /* Undefined bitmap. A question mark. */ |
| 94 | /* |
| 95 | ..xxxx.. |
| 96 | .xxxxxx. |
| 97 | xx....xx |
| 98 | xx....xx |
| 99 | ....xx.. |
| 100 | ...xx... |
| 101 | ...xx... |
| 102 | ........ |
| 103 | ...xx... |
| 104 | ...xx... |
| 105 | */ |
| 106 | static unsigned short question_mark_bits[] = { |
| 107 | 0x3c, 0x7e, 0x7e, 0x0c, 0x18, 0x18, 0x00, 0x18, 0x18}; |
| 108 | |
| 109 | /* An arrow like this: `<-'. */ |
| 110 | /* |
| 111 | ...xx... |
| 112 | ..xx.... |
| 113 | .xx..... |
| 114 | xxxxxx.. |
| 115 | xxxxxx.. |
| 116 | .xx..... |
| 117 | ..xx.... |
| 118 | ...xx... |
| 119 | */ |
| 120 | static unsigned short left_arrow_bits[] = { |
| 121 | 0x18, 0x30, 0x60, 0xfc, 0xfc, 0x60, 0x30, 0x18}; |
| 122 | |
| 123 | |
| 124 | /* Right truncation arrow bitmap `->'. */ |
| 125 | /* |
| 126 | ...xx... |
| 127 | ....xx.. |
| 128 | .....xx. |
| 129 | ..xxxxxx |
| 130 | ..xxxxxx |
| 131 | .....xx. |
| 132 | ....xx.. |
| 133 | ...xx... |
| 134 | */ |
| 135 | static unsigned short right_arrow_bits[] = { |
| 136 | 0x18, 0x0c, 0x06, 0x3f, 0x3f, 0x06, 0x0c, 0x18}; |
| 137 | |
| 138 | |
| 139 | /* Up arrow bitmap. */ |
| 140 | /* |
| 141 | ...xx... |
| 142 | ..xxxx.. |
| 143 | .xxxxxx. |
| 144 | xxxxxxxx |
| 145 | ...xx... |
| 146 | ...xx... |
| 147 | ...xx... |
| 148 | ...xx... |
| 149 | */ |
| 150 | static unsigned short up_arrow_bits[] = { |
| 151 | 0x18, 0x3c, 0x7e, 0xff, 0x18, 0x18, 0x18, 0x18}; |
| 152 | |
| 153 | |
| 154 | /* Down arrow bitmap. */ |
| 155 | /* |
| 156 | ...xx... |
| 157 | ...xx... |
| 158 | ...xx... |
| 159 | ...xx... |
| 160 | xxxxxxxx |
| 161 | .xxxxxx. |
| 162 | ..xxxx.. |
| 163 | ...xx... |
| 164 | */ |
| 165 | static unsigned short down_arrow_bits[] = { |
| 166 | 0x18, 0x18, 0x18, 0x18, 0xff, 0x7e, 0x3c, 0x18}; |
| 167 | |
| 168 | /* Marker for continuation lines. */ |
| 169 | /* |
| 170 | ..xxxx.. |
| 171 | .xxxxx.. |
| 172 | xx...... |
| 173 | xxx..x.. |
| 174 | xxxxxx.. |
| 175 | .xxxxx.. |
| 176 | ..xxxx.. |
| 177 | .xxxxx.. |
| 178 | */ |
| 179 | static unsigned short left_curly_arrow_bits[] = { |
| 180 | 0x3c, 0x7c, 0xc0, 0xe4, 0xfc, 0x7c, 0x3c, 0x7c}; |
| 181 | |
| 182 | /* Marker for continued lines. */ |
| 183 | /* |
| 184 | ..xxxx.. |
| 185 | ..xxxxx. |
| 186 | ......xx |
| 187 | ..x..xxx |
| 188 | ..xxxxxx |
| 189 | ..xxxxx. |
| 190 | ..xxxx.. |
| 191 | ..xxxxx. |
| 192 | */ |
| 193 | static unsigned short right_curly_arrow_bits[] = { |
| 194 | 0x3c, 0x3e, 0x03, 0x27, 0x3f, 0x3e, 0x3c, 0x3e}; |
| 195 | |
| 196 | /* Reverse Overlay arrow bitmap. A triangular arrow. */ |
| 197 | /* |
| 198 | ......xx |
| 199 | ....xxxx |
| 200 | ...xxxxx |
| 201 | ..xxxxxx |
| 202 | ..xxxxxx |
| 203 | ...xxxxx |
| 204 | ....xxxx |
| 205 | ......xx |
| 206 | */ |
| 207 | static unsigned short left_triangle_bits[] = { |
| 208 | 0x03, 0x0f, 0x1f, 0x3f, 0x3f, 0x1f, 0x0f, 0x03}; |
| 209 | |
| 210 | /* Overlay arrow bitmap. A triangular arrow. */ |
| 211 | /* |
| 212 | xx...... |
| 213 | xxxx.... |
| 214 | xxxxx... |
| 215 | xxxxxx.. |
| 216 | xxxxxx.. |
| 217 | xxxxx... |
| 218 | xxxx.... |
| 219 | xx...... |
| 220 | */ |
| 221 | static unsigned short right_triangle_bits[] = { |
| 222 | 0xc0, 0xf0, 0xf8, 0xfc, 0xfc, 0xf8, 0xf0, 0xc0}; |
| 223 | |
| 224 | /* First line bitmap. An top-left angle. */ |
| 225 | /* |
| 226 | xxxxxx.. |
| 227 | xxxxxx.. |
| 228 | xx...... |
| 229 | xx...... |
| 230 | xx...... |
| 231 | xx...... |
| 232 | xx...... |
| 233 | ........ |
| 234 | */ |
| 235 | static unsigned short top_left_angle_bits[] = { |
| 236 | 0xfc, 0xfc, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0x00}; |
| 237 | |
| 238 | /* First line bitmap. An right-up angle. */ |
| 239 | /* |
| 240 | ..xxxxxx |
| 241 | ..xxxxxx |
| 242 | ......xx |
| 243 | ......xx |
| 244 | ......xx |
| 245 | ......xx |
| 246 | ......xx |
| 247 | ........ |
| 248 | */ |
| 249 | static unsigned short top_right_angle_bits[] = { |
| 250 | 0x3f, 0x3f, 0x03, 0x03, 0x03, 0x03, 0x03, 0x00}; |
| 251 | |
| 252 | /* Last line bitmap. An left-down angle. */ |
| 253 | /* |
| 254 | ........ |
| 255 | xx...... |
| 256 | xx...... |
| 257 | xx...... |
| 258 | xx...... |
| 259 | xx...... |
| 260 | xxxxxx.. |
| 261 | xxxxxx.. |
| 262 | */ |
| 263 | static unsigned short bottom_left_angle_bits[] = { |
| 264 | 0x00, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xfc, 0xfc}; |
| 265 | |
| 266 | /* Last line bitmap. An right-down angle. */ |
| 267 | /* |
| 268 | ........ |
| 269 | ......xx |
| 270 | ......xx |
| 271 | ......xx |
| 272 | ......xx |
| 273 | ......xx |
| 274 | ..xxxxxx |
| 275 | ..xxxxxx |
| 276 | */ |
| 277 | static unsigned short bottom_right_angle_bits[] = { |
| 278 | 0x00, 0x03, 0x03, 0x03, 0x03, 0x03, 0x3f, 0x3f}; |
| 279 | |
| 280 | /* First/last line bitmap. An left bracket. */ |
| 281 | /* |
| 282 | xxxxxx.. |
| 283 | xxxxxx.. |
| 284 | xx...... |
| 285 | xx...... |
| 286 | xx...... |
| 287 | xx...... |
| 288 | xx...... |
| 289 | xx...... |
| 290 | xxxxxx.. |
| 291 | xxxxxx.. |
| 292 | */ |
| 293 | static unsigned short left_bracket_bits[] = { |
| 294 | 0xfc, 0xfc, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xfc, 0xfc}; |
| 295 | |
| 296 | /* First/last line bitmap. An right bracket. */ |
| 297 | /* |
| 298 | ..xxxxxx |
| 299 | ..xxxxxx |
| 300 | ......xx |
| 301 | ......xx |
| 302 | ......xx |
| 303 | ......xx |
| 304 | ......xx |
| 305 | ......xx |
| 306 | ..xxxxxx |
| 307 | ..xxxxxx |
| 308 | */ |
| 309 | static unsigned short right_bracket_bits[] = { |
| 310 | 0x3f, 0x3f, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x3f, 0x3f}; |
| 311 | |
| 312 | /* Filled box cursor bitmap. A filled box; max 13 pixels high. */ |
| 313 | /* |
| 314 | xxxxxxx. |
| 315 | xxxxxxx. |
| 316 | xxxxxxx. |
| 317 | xxxxxxx. |
| 318 | xxxxxxx. |
| 319 | xxxxxxx. |
| 320 | xxxxxxx. |
| 321 | xxxxxxx. |
| 322 | xxxxxxx. |
| 323 | xxxxxxx. |
| 324 | xxxxxxx. |
| 325 | xxxxxxx. |
| 326 | xxxxxxx. |
| 327 | */ |
| 328 | static unsigned short filled_rectangle_bits[] = { |
| 329 | 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe}; |
| 330 | |
| 331 | /* Hollow box cursor bitmap. A hollow box; max 13 pixels high. */ |
| 332 | /* |
| 333 | xxxxxxx. |
| 334 | x.....x. |
| 335 | x.....x. |
| 336 | x.....x. |
| 337 | x.....x. |
| 338 | x.....x. |
| 339 | x.....x. |
| 340 | x.....x. |
| 341 | x.....x. |
| 342 | x.....x. |
| 343 | x.....x. |
| 344 | x.....x. |
| 345 | xxxxxxx. |
| 346 | */ |
| 347 | static unsigned short hollow_rectangle_bits[] = { |
| 348 | 0xfe, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0xfe}; |
| 349 | |
| 350 | /* Hollow square bitmap. */ |
| 351 | /* |
| 352 | .xxxxxx. |
| 353 | .x....x. |
| 354 | .x....x. |
| 355 | .x....x. |
| 356 | .x....x. |
| 357 | .xxxxxx. |
| 358 | */ |
| 359 | static unsigned short hollow_square_bits[] = { |
| 360 | 0x7e, 0x42, 0x42, 0x42, 0x42, 0x7e}; |
| 361 | |
| 362 | /* Filled square bitmap. */ |
| 363 | /* |
| 364 | .xxxxxx. |
| 365 | .xxxxxx. |
| 366 | .xxxxxx. |
| 367 | .xxxxxx. |
| 368 | .xxxxxx. |
| 369 | .xxxxxx. |
| 370 | */ |
| 371 | static unsigned short filled_square_bits[] = { |
| 372 | 0x7e, 0x7e, 0x7e, 0x7e, 0x7e, 0x7e}; |
| 373 | |
| 374 | /* Bar cursor bitmap. A vertical bar; max 13 pixels high. */ |
| 375 | /* |
| 376 | xx...... |
| 377 | xx...... |
| 378 | xx...... |
| 379 | xx...... |
| 380 | xx...... |
| 381 | xx...... |
| 382 | xx...... |
| 383 | xx...... |
| 384 | xx...... |
| 385 | xx...... |
| 386 | xx...... |
| 387 | xx...... |
| 388 | xx...... |
| 389 | */ |
| 390 | static unsigned short vertical_bar_bits[] = { |
| 391 | 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0}; |
| 392 | |
| 393 | /* HBar cursor bitmap. A horizontal bar; 2 pixels high. */ |
| 394 | /* |
| 395 | xxxxxxx. |
| 396 | xxxxxxx. |
| 397 | */ |
| 398 | static unsigned short horizontal_bar_bits[] = { |
| 399 | 0xfe, 0xfe}; |
| 400 | |
| 401 | |
| 402 | /* Bitmap drawn to indicate lines not displaying text if |
| 403 | `indicate-empty-lines' is non-nil. */ |
| 404 | /* |
| 405 | ........ |
| 406 | ..xxxx.. |
| 407 | ........ |
| 408 | ........ |
| 409 | ..xxxx.. |
| 410 | ........ |
| 411 | */ |
| 412 | static unsigned short empty_line_bits[] = { |
| 413 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 414 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 415 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 416 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 417 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 418 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 419 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, |
| 420 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00}; |
| 421 | |
| 422 | |
| 423 | #define BYTES_PER_BITMAP_ROW (sizeof (unsigned short)) |
| 424 | #define STANDARD_BITMAP_HEIGHT(bits) (sizeof (bits)/BYTES_PER_BITMAP_ROW) |
| 425 | #define FRBITS(bits) bits, STANDARD_BITMAP_HEIGHT (bits) |
| 426 | |
| 427 | /* NOTE: The order of these bitmaps must match the sequence |
| 428 | used in fringe.el to define the corresponding symbols. */ |
| 429 | |
| 430 | static struct fringe_bitmap standard_bitmaps[] = |
| 431 | { |
| 432 | { NULL, 0, 0, 0, 0, 0 }, /* NO_FRINGE_BITMAP */ |
| 433 | { FRBITS (question_mark_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 434 | { FRBITS (left_arrow_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 435 | { FRBITS (right_arrow_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 436 | { FRBITS (up_arrow_bits), 8, 0, ALIGN_BITMAP_TOP, 0 }, |
| 437 | { FRBITS (down_arrow_bits), 8, 0, ALIGN_BITMAP_BOTTOM, 0 }, |
| 438 | { FRBITS (left_curly_arrow_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 439 | { FRBITS (right_curly_arrow_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 440 | { FRBITS (left_triangle_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 441 | { FRBITS (right_triangle_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 442 | { FRBITS (top_left_angle_bits), 8, 0, ALIGN_BITMAP_TOP, 0 }, |
| 443 | { FRBITS (top_right_angle_bits), 8, 0, ALIGN_BITMAP_TOP, 0 }, |
| 444 | { FRBITS (bottom_left_angle_bits), 8, 0, ALIGN_BITMAP_BOTTOM, 0 }, |
| 445 | { FRBITS (bottom_right_angle_bits), 8, 0, ALIGN_BITMAP_BOTTOM, 0 }, |
| 446 | { FRBITS (left_bracket_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 447 | { FRBITS (right_bracket_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 448 | { FRBITS (filled_rectangle_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 449 | { FRBITS (hollow_rectangle_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 450 | { FRBITS (filled_square_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 451 | { FRBITS (hollow_square_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 452 | { FRBITS (vertical_bar_bits), 8, 0, ALIGN_BITMAP_CENTER, 0 }, |
| 453 | { FRBITS (horizontal_bar_bits), 8, 0, ALIGN_BITMAP_BOTTOM, 0 }, |
| 454 | { FRBITS (empty_line_bits), 8, 3, ALIGN_BITMAP_TOP, 0 }, |
| 455 | }; |
| 456 | |
| 457 | #define NO_FRINGE_BITMAP 0 |
| 458 | #define UNDEF_FRINGE_BITMAP 1 |
| 459 | #define MAX_STANDARD_FRINGE_BITMAPS (sizeof(standard_bitmaps)/sizeof(standard_bitmaps[0])) |
| 460 | |
| 461 | static struct fringe_bitmap **fringe_bitmaps; |
| 462 | static Lisp_Object *fringe_faces; |
| 463 | static int max_fringe_bitmaps; |
| 464 | |
| 465 | #ifndef HAVE_NS |
| 466 | static |
| 467 | #endif |
| 468 | int max_used_fringe_bitmap = MAX_STANDARD_FRINGE_BITMAPS; |
| 469 | |
| 470 | |
| 471 | /* Lookup bitmap number for symbol BITMAP. |
| 472 | Return 0 if not a bitmap. */ |
| 473 | |
| 474 | int |
| 475 | lookup_fringe_bitmap (Lisp_Object bitmap) |
| 476 | { |
| 477 | int bn; |
| 478 | |
| 479 | bitmap = Fget (bitmap, Qfringe); |
| 480 | if (!INTEGERP (bitmap)) |
| 481 | return 0; |
| 482 | |
| 483 | bn = XINT (bitmap); |
| 484 | if (bn > NO_FRINGE_BITMAP |
| 485 | && bn < max_used_fringe_bitmap |
| 486 | && (bn < MAX_STANDARD_FRINGE_BITMAPS |
| 487 | || fringe_bitmaps[bn] != NULL)) |
| 488 | return bn; |
| 489 | |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | /* Get fringe bitmap name for bitmap number BN. |
| 494 | |
| 495 | Found by traversing Vfringe_bitmaps comparing BN to the |
| 496 | fringe property for each symbol. |
| 497 | |
| 498 | Return BN if not found in Vfringe_bitmaps. */ |
| 499 | |
| 500 | static Lisp_Object |
| 501 | get_fringe_bitmap_name (int bn) |
| 502 | { |
| 503 | Lisp_Object bitmaps; |
| 504 | Lisp_Object num; |
| 505 | |
| 506 | /* Zero means no bitmap -- return nil. */ |
| 507 | if (bn <= 0) |
| 508 | return Qnil; |
| 509 | |
| 510 | bitmaps = Vfringe_bitmaps; |
| 511 | num = make_number (bn); |
| 512 | |
| 513 | while (CONSP (bitmaps)) |
| 514 | { |
| 515 | Lisp_Object bitmap = XCAR (bitmaps); |
| 516 | if (EQ (num, Fget (bitmap, Qfringe))) |
| 517 | return bitmap; |
| 518 | bitmaps = XCDR (bitmaps); |
| 519 | } |
| 520 | |
| 521 | return num; |
| 522 | } |
| 523 | |
| 524 | |
| 525 | /* Draw the bitmap WHICH in one of the left or right fringes of |
| 526 | window W. ROW is the glyph row for which to display the bitmap; it |
| 527 | determines the vertical position at which the bitmap has to be |
| 528 | drawn. |
| 529 | LEFT_P is 1 for left fringe, 0 for right fringe. |
| 530 | */ |
| 531 | |
| 532 | static void |
| 533 | draw_fringe_bitmap_1 (struct window *w, struct glyph_row *row, int left_p, int overlay, int which) |
| 534 | { |
| 535 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
| 536 | struct draw_fringe_bitmap_params p; |
| 537 | struct fringe_bitmap *fb; |
| 538 | int period; |
| 539 | int face_id = DEFAULT_FACE_ID; |
| 540 | int offset, header_line_height; |
| 541 | |
| 542 | p.overlay_p = (overlay & 1) == 1; |
| 543 | p.cursor_p = (overlay & 2) == 2; |
| 544 | |
| 545 | if (which != NO_FRINGE_BITMAP) |
| 546 | { |
| 547 | offset = 0; |
| 548 | } |
| 549 | else if (left_p) |
| 550 | { |
| 551 | which = row->left_fringe_bitmap; |
| 552 | face_id = row->left_fringe_face_id; |
| 553 | offset = row->left_fringe_offset; |
| 554 | } |
| 555 | else |
| 556 | { |
| 557 | which = row->right_fringe_bitmap; |
| 558 | face_id = row->right_fringe_face_id; |
| 559 | offset = row->right_fringe_offset; |
| 560 | } |
| 561 | |
| 562 | if (face_id == DEFAULT_FACE_ID) |
| 563 | { |
| 564 | Lisp_Object face = fringe_faces[which]; |
| 565 | face_id = NILP (face) ? lookup_named_face (f, Qfringe, 0) |
| 566 | : lookup_derived_face (f, face, FRINGE_FACE_ID, 0); |
| 567 | if (face_id < 0) |
| 568 | face_id = FRINGE_FACE_ID; |
| 569 | } |
| 570 | |
| 571 | fb = fringe_bitmaps[which]; |
| 572 | if (fb == NULL) |
| 573 | fb = &standard_bitmaps[which < MAX_STANDARD_FRINGE_BITMAPS |
| 574 | ? which : UNDEF_FRINGE_BITMAP]; |
| 575 | |
| 576 | period = fb->period; |
| 577 | |
| 578 | /* Convert row to frame coordinates. */ |
| 579 | p.y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y) + offset; |
| 580 | |
| 581 | p.which = which; |
| 582 | p.bits = fb->bits; |
| 583 | p.wd = fb->width; |
| 584 | |
| 585 | p.h = fb->height; |
| 586 | p.dh = (period > 0 ? (p.y % period) : 0); |
| 587 | p.h -= p.dh; |
| 588 | |
| 589 | /* Adjust y to the offset in the row to start drawing the bitmap. */ |
| 590 | switch (fb->align) |
| 591 | { |
| 592 | case ALIGN_BITMAP_CENTER: |
| 593 | p.y += (row->height - p.h) / 2; |
| 594 | break; |
| 595 | case ALIGN_BITMAP_BOTTOM: |
| 596 | p.y += (row->visible_height - p.h); |
| 597 | break; |
| 598 | case ALIGN_BITMAP_TOP: |
| 599 | break; |
| 600 | } |
| 601 | |
| 602 | p.face = FACE_FROM_ID (f, face_id); |
| 603 | |
| 604 | if (p.face == NULL) |
| 605 | { |
| 606 | /* This could happen after clearing face cache. |
| 607 | But it shouldn't happen anymore. ++kfs */ |
| 608 | return; |
| 609 | } |
| 610 | |
| 611 | PREPARE_FACE_FOR_DISPLAY (f, p.face); |
| 612 | |
| 613 | /* Clear left fringe if no bitmap to draw or if bitmap doesn't fill |
| 614 | the fringe. */ |
| 615 | p.bx = -1; |
| 616 | header_line_height = WINDOW_HEADER_LINE_HEIGHT (w); |
| 617 | p.by = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height, row->y)); |
| 618 | p.ny = row->visible_height; |
| 619 | if (left_p) |
| 620 | { |
| 621 | int wd = WINDOW_LEFT_FRINGE_WIDTH (w); |
| 622 | int x = window_box_left (w, (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
| 623 | ? LEFT_MARGIN_AREA |
| 624 | : TEXT_AREA)); |
| 625 | if (p.wd > wd) |
| 626 | p.wd = wd; |
| 627 | p.x = x - p.wd - (wd - p.wd) / 2; |
| 628 | |
| 629 | if (p.wd < wd || p.y > p.by || p.y + p.h < p.by + p.ny) |
| 630 | { |
| 631 | /* If W has a vertical border to its left, don't draw over it. */ |
| 632 | wd -= ((!WINDOW_LEFTMOST_P (w) |
| 633 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w)) |
| 634 | ? 1 : 0); |
| 635 | p.bx = x - wd; |
| 636 | p.nx = wd; |
| 637 | } |
| 638 | } |
| 639 | else |
| 640 | { |
| 641 | int x = window_box_right (w, |
| 642 | (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
| 643 | ? RIGHT_MARGIN_AREA |
| 644 | : TEXT_AREA)); |
| 645 | int wd = WINDOW_RIGHT_FRINGE_WIDTH (w); |
| 646 | if (p.wd > wd) |
| 647 | p.wd = wd; |
| 648 | p.x = x + (wd - p.wd) / 2; |
| 649 | /* Clear right fringe if no bitmap to draw of if bitmap doesn't fill |
| 650 | the fringe. */ |
| 651 | if (p.wd < wd || p.y > p.by || p.y + p.h < p.by + p.ny) |
| 652 | { |
| 653 | p.bx = x; |
| 654 | p.nx = wd; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | FRAME_RIF (f)->draw_fringe_bitmap (w, row, &p); |
| 659 | } |
| 660 | |
| 661 | static int |
| 662 | get_logical_cursor_bitmap (struct window *w, Lisp_Object cursor) |
| 663 | { |
| 664 | Lisp_Object cmap, bm = Qnil; |
| 665 | |
| 666 | if ((cmap = BVAR (XBUFFER (w->buffer), fringe_cursor_alist)), !NILP (cmap)) |
| 667 | { |
| 668 | bm = Fassq (cursor, cmap); |
| 669 | if (CONSP (bm)) |
| 670 | { |
| 671 | if ((bm = XCDR (bm)), NILP (bm)) |
| 672 | return NO_FRINGE_BITMAP; |
| 673 | return lookup_fringe_bitmap (bm); |
| 674 | } |
| 675 | } |
| 676 | if (EQ (cmap, BVAR (&buffer_defaults, fringe_cursor_alist))) |
| 677 | return NO_FRINGE_BITMAP; |
| 678 | bm = Fassq (cursor, BVAR (&buffer_defaults, fringe_cursor_alist)); |
| 679 | if (!CONSP (bm) || ((bm = XCDR (bm)), NILP (bm))) |
| 680 | return NO_FRINGE_BITMAP; |
| 681 | return lookup_fringe_bitmap (bm); |
| 682 | } |
| 683 | |
| 684 | static int |
| 685 | get_logical_fringe_bitmap (struct window *w, Lisp_Object bitmap, int right_p, int partial_p) |
| 686 | { |
| 687 | Lisp_Object cmap, bm1 = Qnil, bm2 = Qnil, bm; |
| 688 | int ln1 = 0, ln2 = 0; |
| 689 | int ix1 = right_p; |
| 690 | int ix2 = ix1 + (partial_p ? 2 : 0); |
| 691 | |
| 692 | /* Lookup in buffer-local fringe-indicator-alist before global alist. |
| 693 | |
| 694 | Elements are: |
| 695 | BITMAP -- use for all |
| 696 | (L R) -- use for left right (whether partial or not) |
| 697 | (L R PL PR) -- use for left right partial-left partial-right |
| 698 | If any value in local binding is not present or t, use global value. |
| 699 | |
| 700 | If partial, lookup partial bitmap in default value if not found here. |
| 701 | If not partial, or no partial spec is present, use non-partial bitmap. */ |
| 702 | |
| 703 | if ((cmap = BVAR (XBUFFER (w->buffer), fringe_indicator_alist)), !NILP (cmap)) |
| 704 | { |
| 705 | bm1 = Fassq (bitmap, cmap); |
| 706 | if (CONSP (bm1)) |
| 707 | { |
| 708 | if ((bm1 = XCDR (bm1)), NILP (bm1)) |
| 709 | return NO_FRINGE_BITMAP; |
| 710 | if (CONSP (bm1)) |
| 711 | { |
| 712 | ln1 = XINT (Flength (bm1)); |
| 713 | if (partial_p) |
| 714 | { |
| 715 | if (ln1 > ix2) |
| 716 | { |
| 717 | bm = Fnth (make_number (ix2), bm1); |
| 718 | if (!EQ (bm, Qt)) |
| 719 | goto found; |
| 720 | } |
| 721 | } |
| 722 | else |
| 723 | { |
| 724 | if (ln1 > ix1) |
| 725 | { |
| 726 | bm = Fnth (make_number (ix1), bm1); |
| 727 | if (!EQ (bm, Qt)) |
| 728 | goto found; |
| 729 | } |
| 730 | } |
| 731 | } |
| 732 | else if ((bm = bm1, !EQ (bm, Qt))) |
| 733 | goto found; |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | if (!EQ (cmap, BVAR (&buffer_defaults, fringe_indicator_alist)) |
| 738 | && !NILP (BVAR (&buffer_defaults, fringe_indicator_alist))) |
| 739 | { |
| 740 | bm2 = Fassq (bitmap, BVAR (&buffer_defaults, fringe_indicator_alist)); |
| 741 | if (CONSP (bm2)) |
| 742 | { |
| 743 | if ((bm2 = XCDR (bm2)), !NILP (bm2)) |
| 744 | { |
| 745 | if (CONSP (bm2)) |
| 746 | { |
| 747 | ln2 = XINT (Flength (bm2)); |
| 748 | if (partial_p) |
| 749 | { |
| 750 | if (ln2 > ix2) |
| 751 | { |
| 752 | bm = Fnth (make_number (ix2), bm2); |
| 753 | if (!EQ (bm, Qt)) |
| 754 | goto found; |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | } |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | if (ln1 > ix1) |
| 763 | { |
| 764 | bm = Fnth (make_number (ix1), bm1); |
| 765 | if (!EQ (bm, Qt)) |
| 766 | goto found; |
| 767 | } |
| 768 | |
| 769 | if (ln2 > ix1) |
| 770 | { |
| 771 | bm = Fnth (make_number (ix1), bm2); |
| 772 | if (!EQ (bm, Qt)) |
| 773 | goto found; |
| 774 | return NO_FRINGE_BITMAP; |
| 775 | } |
| 776 | else if ((bm = bm2, NILP (bm))) |
| 777 | return NO_FRINGE_BITMAP; |
| 778 | |
| 779 | found: |
| 780 | return lookup_fringe_bitmap (bm); |
| 781 | } |
| 782 | |
| 783 | |
| 784 | void |
| 785 | draw_fringe_bitmap (struct window *w, struct glyph_row *row, int left_p) |
| 786 | { |
| 787 | int overlay = 0; |
| 788 | |
| 789 | if (left_p == row->reversed_p && row->cursor_in_fringe_p) |
| 790 | { |
| 791 | Lisp_Object cursor = Qnil; |
| 792 | |
| 793 | switch (w->phys_cursor_type) |
| 794 | { |
| 795 | case HOLLOW_BOX_CURSOR: |
| 796 | if (row->visible_height >= STANDARD_BITMAP_HEIGHT (hollow_rectangle_bits)) |
| 797 | cursor = Qhollow; |
| 798 | else |
| 799 | cursor = Qhollow_small; |
| 800 | break; |
| 801 | case FILLED_BOX_CURSOR: |
| 802 | cursor = Qbox; |
| 803 | break; |
| 804 | case BAR_CURSOR: |
| 805 | cursor = Qbar; |
| 806 | break; |
| 807 | case HBAR_CURSOR: |
| 808 | cursor = Qhbar; |
| 809 | break; |
| 810 | case NO_CURSOR: |
| 811 | default: |
| 812 | w->phys_cursor_on_p = 0; |
| 813 | row->cursor_in_fringe_p = 0; |
| 814 | break; |
| 815 | } |
| 816 | if (!NILP (cursor)) |
| 817 | { |
| 818 | int bm = get_logical_cursor_bitmap (w, cursor); |
| 819 | if (bm != NO_FRINGE_BITMAP) |
| 820 | { |
| 821 | draw_fringe_bitmap_1 (w, row, left_p, 2, bm); |
| 822 | overlay = EQ (cursor, Qbox) ? 3 : 1; |
| 823 | } |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | draw_fringe_bitmap_1 (w, row, left_p, overlay, NO_FRINGE_BITMAP); |
| 828 | |
| 829 | if (left_p && row->overlay_arrow_bitmap != NO_FRINGE_BITMAP) |
| 830 | draw_fringe_bitmap_1 (w, row, 1, 1, row->overlay_arrow_bitmap); |
| 831 | } |
| 832 | |
| 833 | |
| 834 | /* Draw fringe bitmaps for glyph row ROW on window W. Call this |
| 835 | function with input blocked. */ |
| 836 | |
| 837 | void |
| 838 | draw_row_fringe_bitmaps (struct window *w, struct glyph_row *row) |
| 839 | { |
| 840 | xassert (interrupt_input_blocked); |
| 841 | |
| 842 | /* If row is completely invisible, because of vscrolling, we |
| 843 | don't have to draw anything. */ |
| 844 | if (row->visible_height <= 0) |
| 845 | return; |
| 846 | |
| 847 | if (WINDOW_LEFT_FRINGE_WIDTH (w) != 0) |
| 848 | draw_fringe_bitmap (w, row, 1); |
| 849 | |
| 850 | if (WINDOW_RIGHT_FRINGE_WIDTH (w) != 0) |
| 851 | draw_fringe_bitmap (w, row, 0); |
| 852 | } |
| 853 | |
| 854 | /* Draw the fringes of window W. Only fringes for rows marked for |
| 855 | update in redraw_fringe_bitmaps_p are drawn. |
| 856 | |
| 857 | Return >0 if left or right fringe was redrawn in any way. |
| 858 | |
| 859 | If NO_FRINGE is non-zero, also return >0 if either fringe has zero width. |
| 860 | |
| 861 | A return value >0 indicates that the vertical line between windows |
| 862 | needs update (as it may be drawn in the fringe). |
| 863 | */ |
| 864 | |
| 865 | int |
| 866 | draw_window_fringes (struct window *w, int no_fringe) |
| 867 | { |
| 868 | struct glyph_row *row; |
| 869 | int yb = window_text_bottom_y (w); |
| 870 | int nrows = w->current_matrix->nrows; |
| 871 | int y, rn; |
| 872 | int updated = 0; |
| 873 | |
| 874 | if (w->pseudo_window_p) |
| 875 | return 0; |
| 876 | |
| 877 | /* Must draw line if no fringe */ |
| 878 | if (no_fringe |
| 879 | && (WINDOW_LEFT_FRINGE_WIDTH (w) == 0 |
| 880 | || WINDOW_RIGHT_FRINGE_WIDTH (w) == 0)) |
| 881 | updated++; |
| 882 | |
| 883 | for (y = w->vscroll, rn = 0, row = w->current_matrix->rows; |
| 884 | y < yb && rn < nrows; |
| 885 | y += row->height, ++row, ++rn) |
| 886 | { |
| 887 | if (!row->redraw_fringe_bitmaps_p) |
| 888 | continue; |
| 889 | draw_row_fringe_bitmaps (w, row); |
| 890 | row->redraw_fringe_bitmaps_p = 0; |
| 891 | updated++; |
| 892 | } |
| 893 | |
| 894 | return updated; |
| 895 | } |
| 896 | |
| 897 | |
| 898 | /* Recalculate the bitmaps to show in the fringes of window W. |
| 899 | Only mark rows with modified bitmaps for update in redraw_fringe_bitmaps_p. |
| 900 | |
| 901 | If KEEP_CURRENT_P is 0, update current_matrix too. */ |
| 902 | |
| 903 | int |
| 904 | update_window_fringes (struct window *w, int keep_current_p) |
| 905 | { |
| 906 | struct glyph_row *row, *cur = 0; |
| 907 | int yb = window_text_bottom_y (w); |
| 908 | int rn, nrows = w->current_matrix->nrows; |
| 909 | int y; |
| 910 | int redraw_p = 0; |
| 911 | Lisp_Object boundary_top = Qnil, boundary_bot = Qnil; |
| 912 | Lisp_Object arrow_top = Qnil, arrow_bot = Qnil; |
| 913 | Lisp_Object empty_pos; |
| 914 | Lisp_Object ind = Qnil; |
| 915 | #define MAX_BITMAP_CACHE (8*4) |
| 916 | int bitmap_cache[MAX_BITMAP_CACHE]; |
| 917 | int top_ind_rn, bot_ind_rn; |
| 918 | int top_ind_min_y, bot_ind_max_y; |
| 919 | |
| 920 | /* top_ind_rn is set to a nonnegative value whenver |
| 921 | row->indicate_bob_p is set, so it's OK that top_row_ends_at_zv_p |
| 922 | is not initialized here. Similarly for bot_ind_rn, |
| 923 | row->indicate_eob_p and bot_row_ends_at_zv_p. */ |
| 924 | int top_row_ends_at_zv_p IF_LINT (= 0), bot_row_ends_at_zv_p IF_LINT (= 0); |
| 925 | |
| 926 | if (w->pseudo_window_p) |
| 927 | return 0; |
| 928 | |
| 929 | if (!MINI_WINDOW_P (w) |
| 930 | && (ind = BVAR (XBUFFER (w->buffer), indicate_buffer_boundaries), !NILP (ind))) |
| 931 | { |
| 932 | if (EQ (ind, Qleft) || EQ (ind, Qright)) |
| 933 | boundary_top = boundary_bot = arrow_top = arrow_bot = ind; |
| 934 | else if (CONSP (ind) && CONSP (XCAR (ind))) |
| 935 | { |
| 936 | Lisp_Object pos; |
| 937 | if (pos = Fassq (Qt, ind), !NILP (pos)) |
| 938 | boundary_top = boundary_bot = arrow_top = arrow_bot = XCDR (pos); |
| 939 | if (pos = Fassq (Qtop, ind), !NILP (pos)) |
| 940 | boundary_top = XCDR (pos); |
| 941 | if (pos = Fassq (Qbottom, ind), !NILP (pos)) |
| 942 | boundary_bot = XCDR (pos); |
| 943 | if (pos = Fassq (Qup, ind), !NILP (pos)) |
| 944 | arrow_top = XCDR (pos); |
| 945 | if (pos = Fassq (Qdown, ind), !NILP (pos)) |
| 946 | arrow_bot = XCDR (pos); |
| 947 | } |
| 948 | else |
| 949 | /* Anything else means boundary on left and no arrows. */ |
| 950 | boundary_top = boundary_bot = Qleft; |
| 951 | } |
| 952 | |
| 953 | top_ind_rn = bot_ind_rn = -1; |
| 954 | if (!NILP (ind)) |
| 955 | { |
| 956 | for (y = w->vscroll, rn = 0; |
| 957 | y < yb && rn < nrows; |
| 958 | y += row->height, ++rn) |
| 959 | { |
| 960 | row = w->desired_matrix->rows + rn; |
| 961 | if (!row->enabled_p) |
| 962 | row = w->current_matrix->rows + rn; |
| 963 | |
| 964 | row->indicate_bob_p = row->indicate_top_line_p = 0; |
| 965 | row->indicate_eob_p = row->indicate_bottom_line_p = 0; |
| 966 | |
| 967 | if (!row->mode_line_p) |
| 968 | { |
| 969 | if (top_ind_rn < 0 && row->visible_height > 0) |
| 970 | { |
| 971 | if (MATRIX_ROW_START_CHARPOS (row) <= BUF_BEGV (XBUFFER (w->buffer)) |
| 972 | && !MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) |
| 973 | row->indicate_bob_p = !NILP (boundary_top); |
| 974 | else |
| 975 | row->indicate_top_line_p = !NILP (arrow_top); |
| 976 | top_ind_rn = rn; |
| 977 | } |
| 978 | |
| 979 | if (bot_ind_rn < 0) |
| 980 | { |
| 981 | if (MATRIX_ROW_END_CHARPOS (row) >= BUF_ZV (XBUFFER (w->buffer)) |
| 982 | && !MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) |
| 983 | row->indicate_eob_p = !NILP (boundary_bot), bot_ind_rn = rn; |
| 984 | else if (y + row->height >= yb) |
| 985 | row->indicate_bottom_line_p = !NILP (arrow_bot), bot_ind_rn = rn; |
| 986 | } |
| 987 | } |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | empty_pos = BVAR (XBUFFER (w->buffer), indicate_empty_lines); |
| 992 | if (!NILP (empty_pos) && !EQ (empty_pos, Qright)) |
| 993 | empty_pos = WINDOW_LEFT_FRINGE_WIDTH (w) == 0 ? Qright : Qleft; |
| 994 | |
| 995 | for (y = 0; y < MAX_BITMAP_CACHE; y++) |
| 996 | bitmap_cache[y] = -1; |
| 997 | |
| 998 | #define LEFT_FRINGE(cache, which, partial_p) \ |
| 999 | (bitmap_cache[cache*4+partial_p] >= 0 \ |
| 1000 | ? bitmap_cache[cache*4+partial_p] \ |
| 1001 | : (bitmap_cache[cache*4+partial_p] = \ |
| 1002 | get_logical_fringe_bitmap (w, which, 0, partial_p))) |
| 1003 | |
| 1004 | #define RIGHT_FRINGE(cache, which, partial_p) \ |
| 1005 | (bitmap_cache[cache*4+2+partial_p] >= 0 \ |
| 1006 | ? bitmap_cache[cache*4+2+partial_p] \ |
| 1007 | : (bitmap_cache[cache*4+2+partial_p] = \ |
| 1008 | get_logical_fringe_bitmap (w, which, 1, partial_p))) |
| 1009 | |
| 1010 | |
| 1011 | /* Extend top-aligned top indicator (or bottom-aligned bottom |
| 1012 | indicator) to adjacent rows if it doesn't fit in one row. */ |
| 1013 | top_ind_min_y = bot_ind_max_y = -1; |
| 1014 | if (top_ind_rn >= 0) |
| 1015 | { |
| 1016 | int bn = NO_FRINGE_BITMAP; |
| 1017 | |
| 1018 | row = w->desired_matrix->rows + top_ind_rn; |
| 1019 | if (!row->enabled_p) |
| 1020 | row = w->current_matrix->rows + top_ind_rn; |
| 1021 | |
| 1022 | top_row_ends_at_zv_p = row->ends_at_zv_p; |
| 1023 | if (row->indicate_bob_p) |
| 1024 | { |
| 1025 | if (EQ (boundary_top, Qleft)) |
| 1026 | bn = ((row->indicate_eob_p && EQ (boundary_bot, Qleft)) |
| 1027 | ? LEFT_FRINGE (1, Qtop_bottom, row->ends_at_zv_p) |
| 1028 | : LEFT_FRINGE (2, Qtop, 0)); |
| 1029 | else |
| 1030 | bn = ((row->indicate_eob_p && EQ (boundary_bot, Qright)) |
| 1031 | ? RIGHT_FRINGE (1, Qtop_bottom, row->ends_at_zv_p) |
| 1032 | : RIGHT_FRINGE (2, Qtop, 0)); |
| 1033 | } |
| 1034 | else if (row->indicate_top_line_p) |
| 1035 | { |
| 1036 | if (EQ (arrow_top, Qleft)) |
| 1037 | bn = LEFT_FRINGE (6, Qup, 0); |
| 1038 | else |
| 1039 | bn = RIGHT_FRINGE (6, Qup, 0); |
| 1040 | } |
| 1041 | |
| 1042 | if (bn != NO_FRINGE_BITMAP) |
| 1043 | { |
| 1044 | struct fringe_bitmap *fb; |
| 1045 | |
| 1046 | fb = fringe_bitmaps[bn]; |
| 1047 | if (fb == NULL) |
| 1048 | fb = &standard_bitmaps[bn < MAX_STANDARD_FRINGE_BITMAPS |
| 1049 | ? bn : UNDEF_FRINGE_BITMAP]; |
| 1050 | if (fb->align == ALIGN_BITMAP_TOP && fb->period == 0) |
| 1051 | { |
| 1052 | struct glyph_row *row1; |
| 1053 | int top_ind_max_y; |
| 1054 | |
| 1055 | top_ind_min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
| 1056 | top_ind_max_y = top_ind_min_y + fb->height; |
| 1057 | if (top_ind_max_y > yb) |
| 1058 | top_ind_max_y = yb; |
| 1059 | |
| 1060 | for (y = row->y + row->height, rn = top_ind_rn + 1; |
| 1061 | y < top_ind_max_y && rn < nrows; |
| 1062 | y += row1->height, rn++) |
| 1063 | { |
| 1064 | if (bot_ind_rn >= 0 && rn >= bot_ind_rn) |
| 1065 | break; |
| 1066 | |
| 1067 | row1 = w->desired_matrix->rows + rn; |
| 1068 | if (!row1->enabled_p) |
| 1069 | row1 = w->current_matrix->rows + rn; |
| 1070 | |
| 1071 | row1->indicate_bob_p = row->indicate_bob_p; |
| 1072 | row1->indicate_top_line_p = row->indicate_top_line_p; |
| 1073 | } |
| 1074 | } |
| 1075 | } |
| 1076 | } |
| 1077 | if (bot_ind_rn >= 0) |
| 1078 | { |
| 1079 | int bn = NO_FRINGE_BITMAP; |
| 1080 | |
| 1081 | row = w->desired_matrix->rows + bot_ind_rn; |
| 1082 | if (!row->enabled_p) |
| 1083 | row = w->current_matrix->rows + bot_ind_rn; |
| 1084 | |
| 1085 | bot_row_ends_at_zv_p = row->ends_at_zv_p; |
| 1086 | if (row->indicate_eob_p) |
| 1087 | { |
| 1088 | if (EQ (boundary_bot, Qleft)) |
| 1089 | bn = LEFT_FRINGE (3, Qbottom, row->ends_at_zv_p); |
| 1090 | else |
| 1091 | bn = RIGHT_FRINGE (3, Qbottom, row->ends_at_zv_p); |
| 1092 | } |
| 1093 | else if (row->indicate_bottom_line_p) |
| 1094 | { |
| 1095 | if (EQ (arrow_bot, Qleft)) |
| 1096 | bn = LEFT_FRINGE (7, Qdown, 0); |
| 1097 | else |
| 1098 | bn = RIGHT_FRINGE (7, Qdown, 0); |
| 1099 | } |
| 1100 | |
| 1101 | if (bn != NO_FRINGE_BITMAP) |
| 1102 | { |
| 1103 | struct fringe_bitmap *fb; |
| 1104 | |
| 1105 | fb = fringe_bitmaps[bn]; |
| 1106 | if (fb == NULL) |
| 1107 | fb = &standard_bitmaps[bn < MAX_STANDARD_FRINGE_BITMAPS |
| 1108 | ? bn : UNDEF_FRINGE_BITMAP]; |
| 1109 | if (fb->align == ALIGN_BITMAP_BOTTOM && fb->period == 0) |
| 1110 | { |
| 1111 | struct glyph_row *row1; |
| 1112 | int bot_ind_min_y; |
| 1113 | |
| 1114 | bot_ind_max_y = row->y + row->visible_height; |
| 1115 | bot_ind_min_y = bot_ind_max_y - fb->height; |
| 1116 | if (bot_ind_min_y < WINDOW_HEADER_LINE_HEIGHT (w)) |
| 1117 | bot_ind_min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
| 1118 | |
| 1119 | for (y = row->y, rn = bot_ind_rn - 1; |
| 1120 | y >= bot_ind_min_y && rn >= 0; |
| 1121 | y -= row1->height, rn--) |
| 1122 | { |
| 1123 | if (top_ind_rn >= 0 && rn <= top_ind_rn) |
| 1124 | break; |
| 1125 | |
| 1126 | row1 = w->desired_matrix->rows + rn; |
| 1127 | if (!row1->enabled_p) |
| 1128 | row1 = w->current_matrix->rows + rn; |
| 1129 | |
| 1130 | row1->indicate_eob_p = row->indicate_eob_p; |
| 1131 | row1->indicate_bottom_line_p = row->indicate_bottom_line_p; |
| 1132 | } |
| 1133 | } |
| 1134 | } |
| 1135 | } |
| 1136 | |
| 1137 | for (y = w->vscroll, rn = 0; |
| 1138 | y < yb && rn < nrows; |
| 1139 | y += row->height, rn++) |
| 1140 | { |
| 1141 | int left, right; |
| 1142 | unsigned left_face_id, right_face_id; |
| 1143 | int left_offset, right_offset; |
| 1144 | |
| 1145 | row = w->desired_matrix->rows + rn; |
| 1146 | cur = w->current_matrix->rows + rn; |
| 1147 | if (!row->enabled_p) |
| 1148 | row = cur; |
| 1149 | |
| 1150 | left_face_id = right_face_id = DEFAULT_FACE_ID; |
| 1151 | left_offset = right_offset = 0; |
| 1152 | |
| 1153 | /* Decide which bitmap to draw in the left fringe. */ |
| 1154 | if (WINDOW_LEFT_FRINGE_WIDTH (w) == 0) |
| 1155 | left = NO_FRINGE_BITMAP; |
| 1156 | else if (row->left_user_fringe_bitmap != NO_FRINGE_BITMAP) |
| 1157 | { |
| 1158 | left = row->left_user_fringe_bitmap; |
| 1159 | left_face_id = row->left_user_fringe_face_id; |
| 1160 | } |
| 1161 | else if ((!row->reversed_p && row->truncated_on_left_p) |
| 1162 | || (row->reversed_p && row->truncated_on_right_p)) |
| 1163 | left = LEFT_FRINGE(0, Qtruncation, 0); |
| 1164 | else if (row->indicate_bob_p && EQ (boundary_top, Qleft)) |
| 1165 | { |
| 1166 | left = ((row->indicate_eob_p && EQ (boundary_bot, Qleft)) |
| 1167 | ? LEFT_FRINGE (1, Qtop_bottom, top_row_ends_at_zv_p) |
| 1168 | : LEFT_FRINGE (2, Qtop, 0)); |
| 1169 | if (top_ind_min_y >= 0) |
| 1170 | left_offset = top_ind_min_y - row->y; |
| 1171 | } |
| 1172 | else if (row->indicate_eob_p && EQ (boundary_bot, Qleft)) |
| 1173 | { |
| 1174 | left = LEFT_FRINGE (3, Qbottom, bot_row_ends_at_zv_p); |
| 1175 | if (bot_ind_max_y >= 0) |
| 1176 | left_offset = bot_ind_max_y - (row->y + row->visible_height); |
| 1177 | } |
| 1178 | else if ((!row->reversed_p && MATRIX_ROW_CONTINUATION_LINE_P (row)) |
| 1179 | || (row->reversed_p && row->continued_p)) |
| 1180 | left = LEFT_FRINGE (4, Qcontinuation, 0); |
| 1181 | else if (row->indicate_empty_line_p && EQ (empty_pos, Qleft)) |
| 1182 | left = LEFT_FRINGE (5, Qempty_line, 0); |
| 1183 | else if (row->indicate_top_line_p && EQ (arrow_top, Qleft)) |
| 1184 | { |
| 1185 | left = LEFT_FRINGE (6, Qup, 0); |
| 1186 | if (top_ind_min_y >= 0) |
| 1187 | left_offset = top_ind_min_y - row->y; |
| 1188 | } |
| 1189 | else if (row->indicate_bottom_line_p && EQ (arrow_bot, Qleft)) |
| 1190 | { |
| 1191 | left = LEFT_FRINGE (7, Qdown, 0); |
| 1192 | if (bot_ind_max_y >= 0) |
| 1193 | left_offset = bot_ind_max_y - (row->y + row->visible_height); |
| 1194 | } |
| 1195 | else |
| 1196 | left = NO_FRINGE_BITMAP; |
| 1197 | |
| 1198 | /* Decide which bitmap to draw in the right fringe. */ |
| 1199 | if (WINDOW_RIGHT_FRINGE_WIDTH (w) == 0) |
| 1200 | right = NO_FRINGE_BITMAP; |
| 1201 | else if (row->right_user_fringe_bitmap != NO_FRINGE_BITMAP) |
| 1202 | { |
| 1203 | right = row->right_user_fringe_bitmap; |
| 1204 | right_face_id = row->right_user_fringe_face_id; |
| 1205 | } |
| 1206 | else if ((!row->reversed_p && row->truncated_on_right_p) |
| 1207 | || (row->reversed_p && row->truncated_on_left_p)) |
| 1208 | right = RIGHT_FRINGE (0, Qtruncation, 0); |
| 1209 | else if (row->indicate_bob_p && EQ (boundary_top, Qright)) |
| 1210 | { |
| 1211 | right = ((row->indicate_eob_p && EQ (boundary_bot, Qright)) |
| 1212 | ? RIGHT_FRINGE (1, Qtop_bottom, top_row_ends_at_zv_p) |
| 1213 | : RIGHT_FRINGE (2, Qtop, 0)); |
| 1214 | if (top_ind_min_y >= 0) |
| 1215 | right_offset = top_ind_min_y - row->y; |
| 1216 | } |
| 1217 | else if (row->indicate_eob_p && EQ (boundary_bot, Qright)) |
| 1218 | { |
| 1219 | right = RIGHT_FRINGE (3, Qbottom, bot_row_ends_at_zv_p); |
| 1220 | if (bot_ind_max_y >= 0) |
| 1221 | right_offset = bot_ind_max_y - (row->y + row->visible_height); |
| 1222 | } |
| 1223 | else if ((!row->reversed_p && row->continued_p) |
| 1224 | || (row->reversed_p && MATRIX_ROW_CONTINUATION_LINE_P (row))) |
| 1225 | right = RIGHT_FRINGE (4, Qcontinuation, 0); |
| 1226 | else if (row->indicate_top_line_p && EQ (arrow_top, Qright)) |
| 1227 | { |
| 1228 | right = RIGHT_FRINGE (6, Qup, 0); |
| 1229 | if (top_ind_min_y >= 0) |
| 1230 | right_offset = top_ind_min_y - row->y; |
| 1231 | } |
| 1232 | else if (row->indicate_bottom_line_p && EQ (arrow_bot, Qright)) |
| 1233 | { |
| 1234 | right = RIGHT_FRINGE (7, Qdown, 0); |
| 1235 | if (bot_ind_max_y >= 0) |
| 1236 | right_offset = bot_ind_max_y - (row->y + row->visible_height); |
| 1237 | } |
| 1238 | else if (row->indicate_empty_line_p && EQ (empty_pos, Qright)) |
| 1239 | right = RIGHT_FRINGE (5, Qempty_line, 0); |
| 1240 | else |
| 1241 | right = NO_FRINGE_BITMAP; |
| 1242 | |
| 1243 | if (row->y != cur->y |
| 1244 | || row->visible_height != cur->visible_height |
| 1245 | || row->ends_at_zv_p != cur->ends_at_zv_p |
| 1246 | || left != cur->left_fringe_bitmap |
| 1247 | || right != cur->right_fringe_bitmap |
| 1248 | || left_face_id != cur->left_fringe_face_id |
| 1249 | || right_face_id != cur->right_fringe_face_id |
| 1250 | || left_offset != cur->left_fringe_offset |
| 1251 | || right_offset != cur->right_fringe_offset |
| 1252 | || cur->redraw_fringe_bitmaps_p) |
| 1253 | { |
| 1254 | redraw_p = row->redraw_fringe_bitmaps_p = 1; |
| 1255 | if (!keep_current_p) |
| 1256 | { |
| 1257 | cur->redraw_fringe_bitmaps_p = 1; |
| 1258 | cur->left_fringe_bitmap = left; |
| 1259 | cur->right_fringe_bitmap = right; |
| 1260 | cur->left_fringe_face_id = left_face_id; |
| 1261 | cur->right_fringe_face_id = right_face_id; |
| 1262 | cur->left_fringe_offset = left_offset; |
| 1263 | cur->right_fringe_offset = right_offset; |
| 1264 | } |
| 1265 | } |
| 1266 | |
| 1267 | if (row->overlay_arrow_bitmap < 0) |
| 1268 | row->overlay_arrow_bitmap = get_logical_fringe_bitmap (w, Qoverlay_arrow, 0, 0); |
| 1269 | |
| 1270 | if (row->overlay_arrow_bitmap != cur->overlay_arrow_bitmap) |
| 1271 | { |
| 1272 | redraw_p = row->redraw_fringe_bitmaps_p = cur->redraw_fringe_bitmaps_p = 1; |
| 1273 | cur->overlay_arrow_bitmap = row->overlay_arrow_bitmap; |
| 1274 | } |
| 1275 | |
| 1276 | row->left_fringe_bitmap = left; |
| 1277 | row->right_fringe_bitmap = right; |
| 1278 | row->left_fringe_face_id = left_face_id; |
| 1279 | row->right_fringe_face_id = right_face_id; |
| 1280 | row->left_fringe_offset = left_offset; |
| 1281 | row->right_fringe_offset = right_offset; |
| 1282 | } |
| 1283 | |
| 1284 | return redraw_p && !keep_current_p; |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | /* Compute actual fringe widths for frame F. |
| 1289 | |
| 1290 | If REDRAW is 1, redraw F if the fringe settings was actually |
| 1291 | modified and F is visible. |
| 1292 | |
| 1293 | Since the combined left and right fringe must occupy an integral |
| 1294 | number of columns, we may need to add some pixels to each fringe. |
| 1295 | Typically, we add an equal amount (+/- 1 pixel) to each fringe, |
| 1296 | but a negative width value is taken literally (after negating it). |
| 1297 | |
| 1298 | We never make the fringes narrower than specified. |
| 1299 | */ |
| 1300 | |
| 1301 | void |
| 1302 | compute_fringe_widths (struct frame *f, int redraw) |
| 1303 | { |
| 1304 | int o_left = FRAME_LEFT_FRINGE_WIDTH (f); |
| 1305 | int o_right = FRAME_RIGHT_FRINGE_WIDTH (f); |
| 1306 | int o_cols = FRAME_FRINGE_COLS (f); |
| 1307 | |
| 1308 | Lisp_Object left_fringe = Fassq (Qleft_fringe, f->param_alist); |
| 1309 | Lisp_Object right_fringe = Fassq (Qright_fringe, f->param_alist); |
| 1310 | int left_fringe_width, right_fringe_width; |
| 1311 | |
| 1312 | if (!NILP (left_fringe)) |
| 1313 | left_fringe = Fcdr (left_fringe); |
| 1314 | if (!NILP (right_fringe)) |
| 1315 | right_fringe = Fcdr (right_fringe); |
| 1316 | |
| 1317 | left_fringe_width = ((NILP (left_fringe) || !INTEGERP (left_fringe)) ? 8 : |
| 1318 | XINT (left_fringe)); |
| 1319 | right_fringe_width = ((NILP (right_fringe) || !INTEGERP (right_fringe)) ? 8 : |
| 1320 | XINT (right_fringe)); |
| 1321 | |
| 1322 | if (left_fringe_width || right_fringe_width) |
| 1323 | { |
| 1324 | int left_wid = left_fringe_width >= 0 ? left_fringe_width : -left_fringe_width; |
| 1325 | int right_wid = right_fringe_width >= 0 ? right_fringe_width : -right_fringe_width; |
| 1326 | int conf_wid = left_wid + right_wid; |
| 1327 | int font_wid = FRAME_COLUMN_WIDTH (f); |
| 1328 | int cols = (left_wid + right_wid + font_wid-1) / font_wid; |
| 1329 | int real_wid = cols * font_wid; |
| 1330 | if (left_wid && right_wid) |
| 1331 | { |
| 1332 | if (left_fringe_width < 0) |
| 1333 | { |
| 1334 | /* Left fringe width is fixed, adjust right fringe if necessary */ |
| 1335 | FRAME_LEFT_FRINGE_WIDTH (f) = left_wid; |
| 1336 | FRAME_RIGHT_FRINGE_WIDTH (f) = real_wid - left_wid; |
| 1337 | } |
| 1338 | else if (right_fringe_width < 0) |
| 1339 | { |
| 1340 | /* Right fringe width is fixed, adjust left fringe if necessary */ |
| 1341 | FRAME_LEFT_FRINGE_WIDTH (f) = real_wid - right_wid; |
| 1342 | FRAME_RIGHT_FRINGE_WIDTH (f) = right_wid; |
| 1343 | } |
| 1344 | else |
| 1345 | { |
| 1346 | /* Adjust both fringes with an equal amount. |
| 1347 | Note that we are doing integer arithmetic here, so don't |
| 1348 | lose a pixel if the total width is an odd number. */ |
| 1349 | int fill = real_wid - conf_wid; |
| 1350 | FRAME_LEFT_FRINGE_WIDTH (f) = left_wid + fill/2; |
| 1351 | FRAME_RIGHT_FRINGE_WIDTH (f) = right_wid + fill - fill/2; |
| 1352 | } |
| 1353 | } |
| 1354 | else if (left_fringe_width) |
| 1355 | { |
| 1356 | FRAME_LEFT_FRINGE_WIDTH (f) = real_wid; |
| 1357 | FRAME_RIGHT_FRINGE_WIDTH (f) = 0; |
| 1358 | } |
| 1359 | else |
| 1360 | { |
| 1361 | FRAME_LEFT_FRINGE_WIDTH (f) = 0; |
| 1362 | FRAME_RIGHT_FRINGE_WIDTH (f) = real_wid; |
| 1363 | } |
| 1364 | FRAME_FRINGE_COLS (f) = cols; |
| 1365 | } |
| 1366 | else |
| 1367 | { |
| 1368 | FRAME_LEFT_FRINGE_WIDTH (f) = 0; |
| 1369 | FRAME_RIGHT_FRINGE_WIDTH (f) = 0; |
| 1370 | FRAME_FRINGE_COLS (f) = 0; |
| 1371 | } |
| 1372 | |
| 1373 | if (redraw && FRAME_VISIBLE_P (f)) |
| 1374 | if (o_left != FRAME_LEFT_FRINGE_WIDTH (f) || |
| 1375 | o_right != FRAME_RIGHT_FRINGE_WIDTH (f) || |
| 1376 | o_cols != FRAME_FRINGE_COLS (f)) |
| 1377 | redraw_frame (f); |
| 1378 | } |
| 1379 | |
| 1380 | |
| 1381 | /* Free resources used by a user-defined bitmap. */ |
| 1382 | |
| 1383 | static void |
| 1384 | destroy_fringe_bitmap (int n) |
| 1385 | { |
| 1386 | struct fringe_bitmap **fbp; |
| 1387 | |
| 1388 | fringe_faces[n] = Qnil; |
| 1389 | |
| 1390 | fbp = &fringe_bitmaps[n]; |
| 1391 | if (*fbp && (*fbp)->dynamic) |
| 1392 | { |
| 1393 | /* XXX Is SELECTED_FRAME OK here? */ |
| 1394 | struct redisplay_interface *rif = FRAME_RIF (SELECTED_FRAME ()); |
| 1395 | if (rif && rif->destroy_fringe_bitmap) |
| 1396 | rif->destroy_fringe_bitmap (n); |
| 1397 | xfree (*fbp); |
| 1398 | *fbp = NULL; |
| 1399 | } |
| 1400 | |
| 1401 | while (max_used_fringe_bitmap > MAX_STANDARD_FRINGE_BITMAPS |
| 1402 | && fringe_bitmaps[max_used_fringe_bitmap - 1] == NULL) |
| 1403 | max_used_fringe_bitmap--; |
| 1404 | } |
| 1405 | |
| 1406 | |
| 1407 | DEFUN ("destroy-fringe-bitmap", Fdestroy_fringe_bitmap, Sdestroy_fringe_bitmap, |
| 1408 | 1, 1, 0, |
| 1409 | doc: /* Destroy fringe bitmap BITMAP. |
| 1410 | If BITMAP overrides a standard fringe bitmap, the original bitmap is restored. */) |
| 1411 | (Lisp_Object bitmap) |
| 1412 | { |
| 1413 | int n; |
| 1414 | |
| 1415 | CHECK_SYMBOL (bitmap); |
| 1416 | n = lookup_fringe_bitmap (bitmap); |
| 1417 | if (!n) |
| 1418 | return Qnil; |
| 1419 | |
| 1420 | destroy_fringe_bitmap (n); |
| 1421 | |
| 1422 | if (n >= MAX_STANDARD_FRINGE_BITMAPS) |
| 1423 | { |
| 1424 | Vfringe_bitmaps = Fdelq (bitmap, Vfringe_bitmaps); |
| 1425 | /* It would be better to remove the fringe property. */ |
| 1426 | Fput (bitmap, Qfringe, Qnil); |
| 1427 | } |
| 1428 | |
| 1429 | return Qnil; |
| 1430 | } |
| 1431 | |
| 1432 | |
| 1433 | /* Initialize bitmap bit. |
| 1434 | |
| 1435 | On X, we bit-swap the built-in bitmaps and reduce bitmap |
| 1436 | from short to char array if width is <= 8 bits. |
| 1437 | |
| 1438 | On MAC with big-endian CPU, we need to byte-swap each short. |
| 1439 | |
| 1440 | On W32 and MAC (little endian), there's no need to do this. |
| 1441 | */ |
| 1442 | |
| 1443 | #if defined (HAVE_X_WINDOWS) |
| 1444 | static const unsigned char swap_nibble[16] = { |
| 1445 | 0x0, 0x8, 0x4, 0xc, /* 0000 1000 0100 1100 */ |
| 1446 | 0x2, 0xa, 0x6, 0xe, /* 0010 1010 0110 1110 */ |
| 1447 | 0x1, 0x9, 0x5, 0xd, /* 0001 1001 0101 1101 */ |
| 1448 | 0x3, 0xb, 0x7, 0xf}; /* 0011 1011 0111 1111 */ |
| 1449 | #endif /* HAVE_X_WINDOWS */ |
| 1450 | |
| 1451 | static void |
| 1452 | init_fringe_bitmap (int which, struct fringe_bitmap *fb, int once_p) |
| 1453 | { |
| 1454 | if (once_p || fb->dynamic) |
| 1455 | { |
| 1456 | #if defined (HAVE_X_WINDOWS) |
| 1457 | unsigned short *bits = fb->bits; |
| 1458 | int j; |
| 1459 | |
| 1460 | if (fb->width <= 8) |
| 1461 | { |
| 1462 | unsigned char *cbits = (unsigned char *)fb->bits; |
| 1463 | for (j = 0; j < fb->height; j++) |
| 1464 | { |
| 1465 | unsigned short b = *bits++; |
| 1466 | unsigned char c; |
| 1467 | c = (unsigned char)((swap_nibble[b & 0xf] << 4) |
| 1468 | | (swap_nibble[(b>>4) & 0xf])); |
| 1469 | *cbits++ = (c >> (8 - fb->width)); |
| 1470 | } |
| 1471 | } |
| 1472 | else |
| 1473 | { |
| 1474 | for (j = 0; j < fb->height; j++) |
| 1475 | { |
| 1476 | unsigned short b = *bits; |
| 1477 | b = (unsigned short)((swap_nibble[b & 0xf] << 12) |
| 1478 | | (swap_nibble[(b>>4) & 0xf] << 8) |
| 1479 | | (swap_nibble[(b>>8) & 0xf] << 4) |
| 1480 | | (swap_nibble[(b>>12) & 0xf])); |
| 1481 | b >>= (16 - fb->width); |
| 1482 | #ifdef WORDS_BIGENDIAN |
| 1483 | b = ((b >> 8) | (b << 8)); |
| 1484 | #endif |
| 1485 | *bits++ = b; |
| 1486 | } |
| 1487 | } |
| 1488 | #endif /* HAVE_X_WINDOWS */ |
| 1489 | |
| 1490 | } |
| 1491 | |
| 1492 | if (!once_p) |
| 1493 | { |
| 1494 | /* XXX Is SELECTED_FRAME OK here? */ |
| 1495 | struct redisplay_interface *rif = FRAME_RIF (SELECTED_FRAME ()); |
| 1496 | |
| 1497 | destroy_fringe_bitmap (which); |
| 1498 | |
| 1499 | if (rif && rif->define_fringe_bitmap) |
| 1500 | rif->define_fringe_bitmap (which, fb->bits, fb->height, fb->width); |
| 1501 | |
| 1502 | fringe_bitmaps[which] = fb; |
| 1503 | if (which >= max_used_fringe_bitmap) |
| 1504 | max_used_fringe_bitmap = which + 1; |
| 1505 | } |
| 1506 | } |
| 1507 | |
| 1508 | |
| 1509 | DEFUN ("define-fringe-bitmap", Fdefine_fringe_bitmap, Sdefine_fringe_bitmap, |
| 1510 | 2, 5, 0, |
| 1511 | doc: /* Define fringe bitmap BITMAP from BITS of size HEIGHT x WIDTH. |
| 1512 | BITMAP is a symbol identifying the new fringe bitmap. |
| 1513 | BITS is either a string or a vector of integers. |
| 1514 | HEIGHT is height of bitmap. If HEIGHT is nil, use length of BITS. |
| 1515 | WIDTH must be an integer between 1 and 16, or nil which defaults to 8. |
| 1516 | Optional fifth arg ALIGN may be one of `top', `center', or `bottom', |
| 1517 | indicating the positioning of the bitmap relative to the rows where it |
| 1518 | is used; the default is to center the bitmap. Fifth arg may also be a |
| 1519 | list (ALIGN PERIODIC) where PERIODIC non-nil specifies that the bitmap |
| 1520 | should be repeated. |
| 1521 | If BITMAP already exists, the existing definition is replaced. */) |
| 1522 | (Lisp_Object bitmap, Lisp_Object bits, Lisp_Object height, Lisp_Object width, Lisp_Object align) |
| 1523 | { |
| 1524 | int n, h, i, j; |
| 1525 | unsigned short *b; |
| 1526 | struct fringe_bitmap fb, *xfb; |
| 1527 | int fill1 = 0, fill2 = 0; |
| 1528 | |
| 1529 | CHECK_SYMBOL (bitmap); |
| 1530 | |
| 1531 | if (STRINGP (bits)) |
| 1532 | h = SCHARS (bits); |
| 1533 | else if (VECTORP (bits)) |
| 1534 | h = ASIZE (bits); |
| 1535 | else |
| 1536 | wrong_type_argument (Qsequencep, bits); |
| 1537 | |
| 1538 | if (NILP (height)) |
| 1539 | fb.height = h; |
| 1540 | else |
| 1541 | { |
| 1542 | CHECK_NUMBER (height); |
| 1543 | fb.height = min (XINT (height), 255); |
| 1544 | if (fb.height > h) |
| 1545 | { |
| 1546 | fill1 = (fb.height - h) / 2; |
| 1547 | fill2 = fb.height - h - fill1; |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | if (NILP (width)) |
| 1552 | fb.width = 8; |
| 1553 | else |
| 1554 | { |
| 1555 | CHECK_NUMBER (width); |
| 1556 | fb.width = min (XINT (width), 255); |
| 1557 | } |
| 1558 | |
| 1559 | fb.period = 0; |
| 1560 | fb.align = ALIGN_BITMAP_CENTER; |
| 1561 | |
| 1562 | if (CONSP (align)) |
| 1563 | { |
| 1564 | Lisp_Object period = XCDR (align); |
| 1565 | if (CONSP (period)) |
| 1566 | { |
| 1567 | period = XCAR (period); |
| 1568 | if (!NILP (period)) |
| 1569 | { |
| 1570 | fb.period = fb.height; |
| 1571 | fb.height = 255; |
| 1572 | } |
| 1573 | } |
| 1574 | align = XCAR (align); |
| 1575 | } |
| 1576 | if (EQ (align, Qtop)) |
| 1577 | fb.align = ALIGN_BITMAP_TOP; |
| 1578 | else if (EQ (align, Qbottom)) |
| 1579 | fb.align = ALIGN_BITMAP_BOTTOM; |
| 1580 | else if (!NILP (align) && !EQ (align, Qcenter)) |
| 1581 | error ("Bad align argument"); |
| 1582 | |
| 1583 | n = lookup_fringe_bitmap (bitmap); |
| 1584 | if (!n) |
| 1585 | { |
| 1586 | if (max_used_fringe_bitmap < max_fringe_bitmaps) |
| 1587 | n = max_used_fringe_bitmap++; |
| 1588 | else |
| 1589 | { |
| 1590 | for (n = MAX_STANDARD_FRINGE_BITMAPS; |
| 1591 | n < max_fringe_bitmaps; |
| 1592 | n++) |
| 1593 | if (fringe_bitmaps[n] == NULL) |
| 1594 | break; |
| 1595 | |
| 1596 | if (n == max_fringe_bitmaps) |
| 1597 | { |
| 1598 | if ((max_fringe_bitmaps + 20) > MAX_FRINGE_BITMAPS) |
| 1599 | error ("No free fringe bitmap slots"); |
| 1600 | |
| 1601 | i = max_fringe_bitmaps; |
| 1602 | max_fringe_bitmaps += 20; |
| 1603 | fringe_bitmaps |
| 1604 | = ((struct fringe_bitmap **) |
| 1605 | xrealloc (fringe_bitmaps, max_fringe_bitmaps * sizeof (struct fringe_bitmap *))); |
| 1606 | fringe_faces |
| 1607 | = (Lisp_Object *) xrealloc (fringe_faces, max_fringe_bitmaps * sizeof (Lisp_Object)); |
| 1608 | |
| 1609 | for (; i < max_fringe_bitmaps; i++) |
| 1610 | { |
| 1611 | fringe_bitmaps[i] = NULL; |
| 1612 | fringe_faces[i] = Qnil; |
| 1613 | } |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | Vfringe_bitmaps = Fcons (bitmap, Vfringe_bitmaps); |
| 1618 | Fput (bitmap, Qfringe, make_number (n)); |
| 1619 | } |
| 1620 | |
| 1621 | fb.dynamic = 1; |
| 1622 | |
| 1623 | xfb = (struct fringe_bitmap *) xmalloc (sizeof fb |
| 1624 | + fb.height * BYTES_PER_BITMAP_ROW); |
| 1625 | fb.bits = b = (unsigned short *) (xfb + 1); |
| 1626 | memset (b, 0, fb.height); |
| 1627 | |
| 1628 | j = 0; |
| 1629 | while (j < fb.height) |
| 1630 | { |
| 1631 | for (i = 0; i < fill1 && j < fb.height; i++) |
| 1632 | b[j++] = 0; |
| 1633 | for (i = 0; i < h && j < fb.height; i++) |
| 1634 | { |
| 1635 | Lisp_Object elt = Faref (bits, make_number (i)); |
| 1636 | b[j++] = NUMBERP (elt) ? XINT (elt) : 0; |
| 1637 | } |
| 1638 | for (i = 0; i < fill2 && j < fb.height; i++) |
| 1639 | b[j++] = 0; |
| 1640 | } |
| 1641 | |
| 1642 | *xfb = fb; |
| 1643 | |
| 1644 | init_fringe_bitmap (n, xfb, 0); |
| 1645 | |
| 1646 | return bitmap; |
| 1647 | } |
| 1648 | |
| 1649 | DEFUN ("set-fringe-bitmap-face", Fset_fringe_bitmap_face, Sset_fringe_bitmap_face, |
| 1650 | 1, 2, 0, |
| 1651 | doc: /* Set face for fringe bitmap BITMAP to FACE. |
| 1652 | If FACE is nil, reset face to default fringe face. */) |
| 1653 | (Lisp_Object bitmap, Lisp_Object face) |
| 1654 | { |
| 1655 | int n; |
| 1656 | int face_id; |
| 1657 | |
| 1658 | CHECK_SYMBOL (bitmap); |
| 1659 | n = lookup_fringe_bitmap (bitmap); |
| 1660 | if (!n) |
| 1661 | error ("Undefined fringe bitmap"); |
| 1662 | |
| 1663 | if (!NILP (face)) |
| 1664 | { |
| 1665 | face_id = lookup_derived_face (SELECTED_FRAME (), face, |
| 1666 | FRINGE_FACE_ID, 1); |
| 1667 | if (face_id < 0) |
| 1668 | error ("No such face"); |
| 1669 | } |
| 1670 | |
| 1671 | fringe_faces[n] = face; |
| 1672 | |
| 1673 | return Qnil; |
| 1674 | } |
| 1675 | |
| 1676 | DEFUN ("fringe-bitmaps-at-pos", Ffringe_bitmaps_at_pos, Sfringe_bitmaps_at_pos, |
| 1677 | 0, 2, 0, |
| 1678 | doc: /* Return fringe bitmaps of row containing position POS in window WINDOW. |
| 1679 | If WINDOW is nil, use selected window. If POS is nil, use value of point |
| 1680 | in that window. Return value is a list (LEFT RIGHT OV), where LEFT |
| 1681 | is the symbol for the bitmap in the left fringe (or nil if no bitmap), |
| 1682 | RIGHT is similar for the right fringe, and OV is non-nil if there is an |
| 1683 | overlay arrow in the left fringe. |
| 1684 | Return nil if POS is not visible in WINDOW. */) |
| 1685 | (Lisp_Object pos, Lisp_Object window) |
| 1686 | { |
| 1687 | struct window *w; |
| 1688 | struct glyph_row *row; |
| 1689 | int textpos; |
| 1690 | |
| 1691 | if (NILP (window)) |
| 1692 | window = selected_window; |
| 1693 | CHECK_WINDOW (window); |
| 1694 | w = XWINDOW (window); |
| 1695 | |
| 1696 | if (!NILP (pos)) |
| 1697 | { |
| 1698 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1699 | textpos = XINT (pos); |
| 1700 | } |
| 1701 | else if (w == XWINDOW (selected_window)) |
| 1702 | textpos = PT; |
| 1703 | else |
| 1704 | textpos = XMARKER (w->pointm)->charpos; |
| 1705 | |
| 1706 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
| 1707 | row = row_containing_pos (w, textpos, row, NULL, 0); |
| 1708 | if (row) |
| 1709 | return list3 (get_fringe_bitmap_name (row->left_fringe_bitmap), |
| 1710 | get_fringe_bitmap_name (row->right_fringe_bitmap), |
| 1711 | (row->overlay_arrow_bitmap == 0 ? Qnil |
| 1712 | : row->overlay_arrow_bitmap < 0 ? Qt |
| 1713 | : get_fringe_bitmap_name (row->overlay_arrow_bitmap))); |
| 1714 | else |
| 1715 | return Qnil; |
| 1716 | } |
| 1717 | |
| 1718 | |
| 1719 | /*********************************************************************** |
| 1720 | Initialization |
| 1721 | ***********************************************************************/ |
| 1722 | |
| 1723 | void |
| 1724 | syms_of_fringe (void) |
| 1725 | { |
| 1726 | Qtruncation = intern_c_string ("truncation"); |
| 1727 | staticpro (&Qtruncation); |
| 1728 | Qcontinuation = intern_c_string ("continuation"); |
| 1729 | staticpro (&Qcontinuation); |
| 1730 | Qoverlay_arrow = intern_c_string ("overlay-arrow"); |
| 1731 | staticpro (&Qoverlay_arrow); |
| 1732 | Qempty_line = intern_c_string ("empty-line"); |
| 1733 | staticpro (&Qempty_line); |
| 1734 | Qtop_bottom = intern_c_string ("top-bottom"); |
| 1735 | staticpro (&Qtop_bottom); |
| 1736 | Qhollow_small = intern_c_string ("hollow-small"); |
| 1737 | staticpro (&Qhollow_small); |
| 1738 | |
| 1739 | defsubr (&Sdestroy_fringe_bitmap); |
| 1740 | defsubr (&Sdefine_fringe_bitmap); |
| 1741 | defsubr (&Sfringe_bitmaps_at_pos); |
| 1742 | defsubr (&Sset_fringe_bitmap_face); |
| 1743 | |
| 1744 | DEFVAR_LISP ("overflow-newline-into-fringe", Voverflow_newline_into_fringe, |
| 1745 | doc: /* *Non-nil means that newline may flow into the right fringe. |
| 1746 | This means that display lines which are exactly as wide as the window |
| 1747 | (not counting the final newline) will only occupy one screen line, by |
| 1748 | showing (or hiding) the final newline in the right fringe; when point |
| 1749 | is at the final newline, the cursor is shown in the right fringe. |
| 1750 | If nil, also continue lines which are exactly as wide as the window. */); |
| 1751 | Voverflow_newline_into_fringe = Qt; |
| 1752 | |
| 1753 | DEFVAR_LISP ("fringe-bitmaps", Vfringe_bitmaps, |
| 1754 | doc: /* List of fringe bitmap symbols. */); |
| 1755 | Vfringe_bitmaps = Qnil; |
| 1756 | } |
| 1757 | |
| 1758 | /* Garbage collection hook */ |
| 1759 | |
| 1760 | void |
| 1761 | mark_fringe_data (void) |
| 1762 | { |
| 1763 | int i; |
| 1764 | |
| 1765 | for (i = 0; i < max_fringe_bitmaps; i++) |
| 1766 | if (!NILP (fringe_faces[i])) |
| 1767 | mark_object (fringe_faces[i]); |
| 1768 | } |
| 1769 | |
| 1770 | /* Initialize this module when Emacs starts. */ |
| 1771 | |
| 1772 | void |
| 1773 | init_fringe_once (void) |
| 1774 | { |
| 1775 | int bt; |
| 1776 | |
| 1777 | for (bt = NO_FRINGE_BITMAP + 1; bt < MAX_STANDARD_FRINGE_BITMAPS; bt++) |
| 1778 | init_fringe_bitmap(bt, &standard_bitmaps[bt], 1); |
| 1779 | } |
| 1780 | |
| 1781 | void |
| 1782 | init_fringe (void) |
| 1783 | { |
| 1784 | int i; |
| 1785 | |
| 1786 | max_fringe_bitmaps = MAX_STANDARD_FRINGE_BITMAPS + 20; |
| 1787 | |
| 1788 | fringe_bitmaps |
| 1789 | = (struct fringe_bitmap **) xmalloc (max_fringe_bitmaps * sizeof (struct fringe_bitmap *)); |
| 1790 | fringe_faces |
| 1791 | = (Lisp_Object *) xmalloc (max_fringe_bitmaps * sizeof (Lisp_Object)); |
| 1792 | |
| 1793 | for (i = 0; i < max_fringe_bitmaps; i++) |
| 1794 | { |
| 1795 | fringe_bitmaps[i] = NULL; |
| 1796 | fringe_faces[i] = Qnil; |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | #ifdef HAVE_NTGUI |
| 1801 | |
| 1802 | void |
| 1803 | w32_init_fringe (struct redisplay_interface *rif) |
| 1804 | { |
| 1805 | int bt; |
| 1806 | |
| 1807 | if (!rif) |
| 1808 | return; |
| 1809 | |
| 1810 | for (bt = NO_FRINGE_BITMAP + 1; bt < MAX_STANDARD_FRINGE_BITMAPS; bt++) |
| 1811 | { |
| 1812 | struct fringe_bitmap *fb = &standard_bitmaps[bt]; |
| 1813 | rif->define_fringe_bitmap (bt, fb->bits, fb->height, fb->width); |
| 1814 | } |
| 1815 | } |
| 1816 | |
| 1817 | void |
| 1818 | w32_reset_fringes (void) |
| 1819 | { |
| 1820 | /* Destroy row bitmaps. */ |
| 1821 | int bt; |
| 1822 | struct redisplay_interface *rif = FRAME_RIF (SELECTED_FRAME ()); |
| 1823 | |
| 1824 | if (!rif) |
| 1825 | return; |
| 1826 | |
| 1827 | for (bt = NO_FRINGE_BITMAP + 1; bt < max_used_fringe_bitmap; bt++) |
| 1828 | rif->destroy_fringe_bitmap (bt); |
| 1829 | } |
| 1830 | |
| 1831 | #endif /* HAVE_NTGUI */ |
| 1832 | |
| 1833 | #endif /* HAVE_WINDOW_SYSTEM */ |