| 1 | /* Updating of data structures for redisplay. |
| 2 | Copyright (C) 1985, 86, 87, 88, 93, 94 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 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | |
| 21 | #include <signal.h> |
| 22 | #include <stdio.h> |
| 23 | |
| 24 | #include <config.h> |
| 25 | #include <ctype.h> |
| 26 | |
| 27 | #include "lisp.h" |
| 28 | #include "termchar.h" |
| 29 | #include "termopts.h" |
| 30 | #include "termhooks.h" |
| 31 | #include "cm.h" |
| 32 | #include "dispextern.h" |
| 33 | #include "buffer.h" |
| 34 | #include "frame.h" |
| 35 | #include "window.h" |
| 36 | #include "commands.h" |
| 37 | #include "disptab.h" |
| 38 | #include "indent.h" |
| 39 | #include "intervals.h" |
| 40 | |
| 41 | #include "systty.h" |
| 42 | #include "systime.h" |
| 43 | |
| 44 | #ifdef HAVE_X_WINDOWS |
| 45 | #include "xterm.h" |
| 46 | #endif /* HAVE_X_WINDOWS */ |
| 47 | |
| 48 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 49 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 50 | |
| 51 | #ifndef PENDING_OUTPUT_COUNT |
| 52 | /* Get number of chars of output now in the buffer of a stdio stream. |
| 53 | This ought to be built in in stdio, but it isn't. |
| 54 | Some s- files override this because their stdio internals differ. */ |
| 55 | #ifdef __GNU_LIBRARY__ |
| 56 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
| 57 | #else |
| 58 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
| 59 | #endif |
| 60 | #endif |
| 61 | |
| 62 | /* Nonzero upon entry to redisplay means do not assume anything about |
| 63 | current contents of actual terminal frame; clear and redraw it. */ |
| 64 | |
| 65 | int frame_garbaged; |
| 66 | |
| 67 | /* Nonzero means last display completed. Zero means it was preempted. */ |
| 68 | |
| 69 | int display_completed; |
| 70 | |
| 71 | /* Lisp variable visible-bell; enables use of screen-flash |
| 72 | instead of audible bell. */ |
| 73 | |
| 74 | int visible_bell; |
| 75 | |
| 76 | /* Invert the color of the whole frame, at a low level. */ |
| 77 | |
| 78 | int inverse_video; |
| 79 | |
| 80 | /* Line speed of the terminal. */ |
| 81 | |
| 82 | int baud_rate; |
| 83 | |
| 84 | /* nil or a symbol naming the window system under which emacs is |
| 85 | running ('x is the only current possibility). */ |
| 86 | |
| 87 | Lisp_Object Vwindow_system; |
| 88 | |
| 89 | /* Version number of X windows: 10, 11 or nil. */ |
| 90 | Lisp_Object Vwindow_system_version; |
| 91 | |
| 92 | /* Vector of glyph definitions. Indexed by glyph number, |
| 93 | the contents are a string which is how to output the glyph. |
| 94 | |
| 95 | If Vglyph_table is nil, a glyph is output by using its low 8 bits |
| 96 | as a character code. */ |
| 97 | |
| 98 | Lisp_Object Vglyph_table; |
| 99 | |
| 100 | /* Display table to use for vectors that don't specify their own. */ |
| 101 | |
| 102 | Lisp_Object Vstandard_display_table; |
| 103 | |
| 104 | /* Nonzero means reading single-character input with prompt |
| 105 | so put cursor on minibuffer after the prompt. |
| 106 | positive means at end of text in echo area; |
| 107 | negative means at beginning of line. */ |
| 108 | int cursor_in_echo_area; |
| 109 | \f |
| 110 | /* The currently selected frame. |
| 111 | In a single-frame version, this variable always remains 0. */ |
| 112 | |
| 113 | FRAME_PTR selected_frame; |
| 114 | |
| 115 | /* A frame which is not just a minibuffer, or 0 if there are no such |
| 116 | frames. This is usually the most recent such frame that was |
| 117 | selected. In a single-frame version, this variable always remains 0. */ |
| 118 | FRAME_PTR last_nonminibuf_frame; |
| 119 | |
| 120 | /* In a single-frame version, the information that would otherwise |
| 121 | exist inside frame objects lives in the following structure instead. |
| 122 | |
| 123 | NOTE: the_only_frame is not checked for garbage collection; don't |
| 124 | store collectible objects in any of its fields! |
| 125 | |
| 126 | You're not/The only frame in town/... */ |
| 127 | |
| 128 | #ifndef MULTI_FRAME |
| 129 | struct frame the_only_frame; |
| 130 | #endif |
| 131 | |
| 132 | /* This is a vector, made larger whenever it isn't large enough, |
| 133 | which is used inside `update_frame' to hold the old contents |
| 134 | of the FRAME_PHYS_LINES of the frame being updated. */ |
| 135 | struct frame_glyphs **ophys_lines; |
| 136 | /* Length of vector currently allocated. */ |
| 137 | int ophys_lines_length; |
| 138 | |
| 139 | FILE *termscript; /* Stdio stream being used for copy of all output. */ |
| 140 | |
| 141 | struct cm Wcm; /* Structure for info on cursor positioning */ |
| 142 | |
| 143 | extern short ospeed; /* Output speed (from sg_ospeed) */ |
| 144 | |
| 145 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
| 146 | \f |
| 147 | #ifdef MULTI_FRAME |
| 148 | |
| 149 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
| 150 | "Clear frame FRAME and output again what is supposed to appear on it.") |
| 151 | (frame) |
| 152 | Lisp_Object frame; |
| 153 | { |
| 154 | FRAME_PTR f; |
| 155 | |
| 156 | CHECK_LIVE_FRAME (frame, 0); |
| 157 | f = XFRAME (frame); |
| 158 | update_begin (f); |
| 159 | /* set_terminal_modes (); */ |
| 160 | clear_frame (); |
| 161 | clear_frame_records (f); |
| 162 | update_end (f); |
| 163 | fflush (stdout); |
| 164 | windows_or_buffers_changed++; |
| 165 | /* Mark all windows as INaccurate, |
| 166 | so that every window will have its redisplay done. */ |
| 167 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
| 168 | f->garbaged = 0; |
| 169 | return Qnil; |
| 170 | } |
| 171 | |
| 172 | redraw_frame (f) |
| 173 | FRAME_PTR f; |
| 174 | { |
| 175 | Lisp_Object frame; |
| 176 | XSET (frame, Lisp_Frame, f); |
| 177 | Fredraw_frame (frame); |
| 178 | } |
| 179 | |
| 180 | #else |
| 181 | |
| 182 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
| 183 | "Clear frame FRAME and output again what is supposed to appear on it.") |
| 184 | (frame) |
| 185 | Lisp_Object frame; |
| 186 | { |
| 187 | update_begin (0); |
| 188 | set_terminal_modes (); |
| 189 | clear_frame (); |
| 190 | update_end (0); |
| 191 | fflush (stdout); |
| 192 | clear_frame_records (0); |
| 193 | windows_or_buffers_changed++; |
| 194 | /* Mark all windows as INaccurate, |
| 195 | so that every window will have its redisplay done. */ |
| 196 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
| 197 | return Qnil; |
| 198 | } |
| 199 | |
| 200 | #endif |
| 201 | |
| 202 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
| 203 | "Clear and redisplay all visible frames.") |
| 204 | () |
| 205 | { |
| 206 | Lisp_Object tail, frame; |
| 207 | |
| 208 | FOR_EACH_FRAME (tail, frame) |
| 209 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
| 210 | Fredraw_frame (frame); |
| 211 | |
| 212 | return Qnil; |
| 213 | } |
| 214 | |
| 215 | /* This is used when frame_garbaged is set. |
| 216 | Redraw the individual frames marked as garbaged. */ |
| 217 | |
| 218 | void |
| 219 | redraw_garbaged_frames () |
| 220 | { |
| 221 | Lisp_Object tail, frame; |
| 222 | |
| 223 | FOR_EACH_FRAME (tail, frame) |
| 224 | if (FRAME_VISIBLE_P (XFRAME (frame)) |
| 225 | && FRAME_GARBAGED_P (XFRAME (frame))) |
| 226 | Fredraw_frame (frame); |
| 227 | } |
| 228 | |
| 229 | \f |
| 230 | static struct frame_glyphs * |
| 231 | make_frame_glyphs (frame, empty) |
| 232 | register FRAME_PTR frame; |
| 233 | int empty; |
| 234 | { |
| 235 | register int i; |
| 236 | register width = FRAME_WIDTH (frame); |
| 237 | register height = FRAME_HEIGHT (frame); |
| 238 | register struct frame_glyphs *new |
| 239 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); |
| 240 | |
| 241 | SET_GLYPHS_FRAME (new, frame); |
| 242 | new->height = height; |
| 243 | new->width = width; |
| 244 | new->used = (int *) xmalloc (height * sizeof (int)); |
| 245 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); |
| 246 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
| 247 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
| 248 | new->enable = (char *) xmalloc (height * sizeof (char)); |
| 249 | bzero (new->enable, height * sizeof (char)); |
| 250 | new->bufp = (int *) xmalloc (height * sizeof (int)); |
| 251 | |
| 252 | #ifdef HAVE_X_WINDOWS |
| 253 | if (FRAME_X_P (frame)) |
| 254 | { |
| 255 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
| 256 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); |
| 257 | new->pix_width = (short *) xmalloc (height * sizeof (short)); |
| 258 | new->pix_height = (short *) xmalloc (height * sizeof (short)); |
| 259 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
| 260 | } |
| 261 | #endif |
| 262 | |
| 263 | if (empty) |
| 264 | { |
| 265 | /* Make the buffer used by decode_mode_spec. This buffer is also |
| 266 | used as temporary storage when updating the frame. See scroll.c. */ |
| 267 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
| 268 | |
| 269 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); |
| 270 | bzero (new->total_contents, total_glyphs); |
| 271 | } |
| 272 | else |
| 273 | { |
| 274 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); |
| 275 | |
| 276 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); |
| 277 | bzero (new->total_contents, total_glyphs); |
| 278 | for (i = 0; i < height; i++) |
| 279 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; |
| 280 | |
| 281 | if (!FRAME_TERMCAP_P (frame)) |
| 282 | { |
| 283 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); |
| 284 | |
| 285 | new->total_charstarts = (int *) xmalloc (total_charstarts); |
| 286 | bzero (new->total_charstarts, total_charstarts); |
| 287 | for (i = 0; i < height; i++) |
| 288 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; |
| 289 | } |
| 290 | else |
| 291 | { |
| 292 | /* Without a window system, we don't really need charstarts. |
| 293 | So use a small amount of space to make enough data structure |
| 294 | to prevent crashes in display_text_line. */ |
| 295 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); |
| 296 | for (i = 0; i < height; i++) |
| 297 | new->charstarts[i] = new->total_charstarts; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | return new; |
| 302 | } |
| 303 | |
| 304 | static void |
| 305 | free_frame_glyphs (frame, glyphs) |
| 306 | FRAME_PTR frame; |
| 307 | struct frame_glyphs *glyphs; |
| 308 | { |
| 309 | if (glyphs->total_contents) |
| 310 | xfree (glyphs->total_contents); |
| 311 | if (glyphs->total_charstarts) |
| 312 | xfree (glyphs->total_charstarts); |
| 313 | |
| 314 | xfree (glyphs->used); |
| 315 | xfree (glyphs->glyphs); |
| 316 | xfree (glyphs->highlight); |
| 317 | xfree (glyphs->enable); |
| 318 | xfree (glyphs->bufp); |
| 319 | if (glyphs->charstarts) |
| 320 | xfree (glyphs->charstarts); |
| 321 | |
| 322 | #ifdef HAVE_X_WINDOWS |
| 323 | if (FRAME_X_P (frame)) |
| 324 | { |
| 325 | xfree (glyphs->top_left_x); |
| 326 | xfree (glyphs->top_left_y); |
| 327 | xfree (glyphs->pix_width); |
| 328 | xfree (glyphs->pix_height); |
| 329 | xfree (glyphs->max_ascent); |
| 330 | } |
| 331 | #endif |
| 332 | |
| 333 | xfree (glyphs); |
| 334 | } |
| 335 | |
| 336 | static void |
| 337 | remake_frame_glyphs (frame) |
| 338 | FRAME_PTR frame; |
| 339 | { |
| 340 | if (FRAME_CURRENT_GLYPHS (frame)) |
| 341 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); |
| 342 | if (FRAME_DESIRED_GLYPHS (frame)) |
| 343 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); |
| 344 | if (FRAME_TEMP_GLYPHS (frame)) |
| 345 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); |
| 346 | |
| 347 | if (FRAME_MESSAGE_BUF (frame)) |
| 348 | { |
| 349 | /* Reallocate the frame's message buffer; remember that |
| 350 | echo_area_glyphs may be pointing here. */ |
| 351 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); |
| 352 | |
| 353 | FRAME_MESSAGE_BUF (frame) |
| 354 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), |
| 355 | FRAME_WIDTH (frame) + 1); |
| 356 | |
| 357 | if (echo_area_glyphs == old_message_buf) |
| 358 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); |
| 359 | if (previous_echo_glyphs == old_message_buf) |
| 360 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); |
| 361 | } |
| 362 | else |
| 363 | FRAME_MESSAGE_BUF (frame) |
| 364 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); |
| 365 | |
| 366 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
| 367 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
| 368 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); |
| 369 | SET_FRAME_GARBAGED (frame); |
| 370 | } |
| 371 | \f |
| 372 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
| 373 | |
| 374 | static int |
| 375 | line_hash_code (m, vpos) |
| 376 | register struct frame_glyphs *m; |
| 377 | int vpos; |
| 378 | { |
| 379 | register GLYPH *body, *end; |
| 380 | register int h = 0; |
| 381 | |
| 382 | if (!m->enable[vpos]) |
| 383 | return 0; |
| 384 | |
| 385 | /* Give all highlighted lines the same hash code |
| 386 | so as to encourage scrolling to leave them in place. */ |
| 387 | if (m->highlight[vpos]) |
| 388 | return -1; |
| 389 | |
| 390 | body = m->glyphs[vpos]; |
| 391 | |
| 392 | if (must_write_spaces) |
| 393 | while (1) |
| 394 | { |
| 395 | GLYPH g = *body++; |
| 396 | |
| 397 | if (g == 0) |
| 398 | break; |
| 399 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; |
| 400 | } |
| 401 | else |
| 402 | while (1) |
| 403 | { |
| 404 | GLYPH g = *body++; |
| 405 | |
| 406 | if (g == 0) |
| 407 | break; |
| 408 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; |
| 409 | } |
| 410 | |
| 411 | if (h) |
| 412 | return h; |
| 413 | return 1; |
| 414 | } |
| 415 | |
| 416 | /* Return number of characters in line in M at vpos VPOS, |
| 417 | except don't count leading and trailing spaces |
| 418 | unless the terminal requires those to be explicitly output. */ |
| 419 | |
| 420 | static unsigned int |
| 421 | line_draw_cost (m, vpos) |
| 422 | struct frame_glyphs *m; |
| 423 | int vpos; |
| 424 | { |
| 425 | register GLYPH *beg = m->glyphs[vpos]; |
| 426 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; |
| 427 | register int i; |
| 428 | register int tlen = GLYPH_TABLE_LENGTH; |
| 429 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; |
| 430 | |
| 431 | /* Ignore trailing and leading spaces if we can. */ |
| 432 | if (!must_write_spaces) |
| 433 | { |
| 434 | while ((end != beg) && (*end == SPACEGLYPH)) |
| 435 | --end; |
| 436 | if (end == beg) |
| 437 | return (0); /* All blank line. */ |
| 438 | |
| 439 | while (*beg == SPACEGLYPH) |
| 440 | ++beg; |
| 441 | } |
| 442 | |
| 443 | /* If we don't have a glyph-table, each glyph is one character, |
| 444 | so return the number of glyphs. */ |
| 445 | if (tbase == 0) |
| 446 | return end - beg; |
| 447 | |
| 448 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ |
| 449 | i = 0; |
| 450 | while ((beg <= end) && *beg) |
| 451 | { |
| 452 | register GLYPH g = *beg++; |
| 453 | |
| 454 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) |
| 455 | i += 1; |
| 456 | else |
| 457 | i += GLYPH_LENGTH (tbase, g); |
| 458 | } |
| 459 | return i; |
| 460 | } |
| 461 | \f |
| 462 | /* The functions on this page are the interface from xdisp.c to redisplay. |
| 463 | |
| 464 | The only other interface into redisplay is through setting |
| 465 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
| 466 | and SET_FRAME_GARBAGED (frame). */ |
| 467 | |
| 468 | /* cancel_line eliminates any request to display a line at position `vpos' */ |
| 469 | |
| 470 | cancel_line (vpos, frame) |
| 471 | int vpos; |
| 472 | register FRAME_PTR frame; |
| 473 | { |
| 474 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
| 475 | } |
| 476 | |
| 477 | clear_frame_records (frame) |
| 478 | register FRAME_PTR frame; |
| 479 | { |
| 480 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
| 481 | } |
| 482 | |
| 483 | /* Prepare to display on line VPOS starting at HPOS within it. */ |
| 484 | |
| 485 | void |
| 486 | get_display_line (frame, vpos, hpos) |
| 487 | register FRAME_PTR frame; |
| 488 | int vpos; |
| 489 | register int hpos; |
| 490 | { |
| 491 | register struct frame_glyphs *glyphs; |
| 492 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); |
| 493 | register GLYPH *p; |
| 494 | |
| 495 | if (vpos < 0) |
| 496 | abort (); |
| 497 | |
| 498 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) |
| 499 | abort (); |
| 500 | |
| 501 | if (! desired_glyphs->enable[vpos]) |
| 502 | { |
| 503 | desired_glyphs->used[vpos] = 0; |
| 504 | desired_glyphs->highlight[vpos] = 0; |
| 505 | desired_glyphs->enable[vpos] = 1; |
| 506 | } |
| 507 | |
| 508 | if (hpos > desired_glyphs->used[vpos]) |
| 509 | { |
| 510 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; |
| 511 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; |
| 512 | |
| 513 | desired_glyphs->used[vpos] = hpos; |
| 514 | while (g != end) |
| 515 | *g++ = SPACEGLYPH; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | /* Like bcopy except never gets confused by overlap. */ |
| 520 | |
| 521 | void |
| 522 | safe_bcopy (from, to, size) |
| 523 | char *from, *to; |
| 524 | int size; |
| 525 | { |
| 526 | if (size <= 0 || from == to) |
| 527 | return; |
| 528 | |
| 529 | /* If the source and destination don't overlap, then bcopy can |
| 530 | handle it. If they do overlap, but the destination is lower in |
| 531 | memory than the source, we'll assume bcopy can handle that. */ |
| 532 | if (to < from || from + size <= to) |
| 533 | bcopy (from, to, size); |
| 534 | |
| 535 | /* Otherwise, we'll copy from the end. */ |
| 536 | else |
| 537 | { |
| 538 | register char *endf = from + size; |
| 539 | register char *endt = to + size; |
| 540 | |
| 541 | /* If TO - FROM is large, then we should break the copy into |
| 542 | nonoverlapping chunks of TO - FROM bytes each. However, if |
| 543 | TO - FROM is small, then the bcopy function call overhead |
| 544 | makes this not worth it. The crossover point could be about |
| 545 | anywhere. Since I don't think the obvious copy loop is too |
| 546 | bad, I'm trying to err in its favor. */ |
| 547 | if (to - from < 64) |
| 548 | { |
| 549 | do |
| 550 | *--endt = *--endf; |
| 551 | while (endf != from); |
| 552 | } |
| 553 | else |
| 554 | { |
| 555 | for (;;) |
| 556 | { |
| 557 | endt -= (to - from); |
| 558 | endf -= (to - from); |
| 559 | |
| 560 | if (endt < to) |
| 561 | break; |
| 562 | |
| 563 | bcopy (endf, endt, to - from); |
| 564 | } |
| 565 | |
| 566 | /* If SIZE wasn't a multiple of TO - FROM, there will be a |
| 567 | little left over. The amount left over is |
| 568 | (endt + (to - from)) - to, which is endt - from. */ |
| 569 | bcopy (from, to, endt - from); |
| 570 | } |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
| 575 | DISTANCE may be negative. */ |
| 576 | |
| 577 | static void |
| 578 | rotate_vector (vector, size, distance) |
| 579 | char *vector; |
| 580 | int size; |
| 581 | int distance; |
| 582 | { |
| 583 | char *temp = (char *) alloca (size); |
| 584 | |
| 585 | if (distance < 0) |
| 586 | distance += size; |
| 587 | |
| 588 | bcopy (vector, temp + distance, size - distance); |
| 589 | bcopy (vector + size - distance, temp, distance); |
| 590 | bcopy (temp, vector, size); |
| 591 | } |
| 592 | |
| 593 | /* Scroll lines from vpos FROM up to but not including vpos END |
| 594 | down by AMOUNT lines (AMOUNT may be negative). |
| 595 | Returns nonzero if done, zero if terminal cannot scroll them. */ |
| 596 | |
| 597 | int |
| 598 | scroll_frame_lines (frame, from, end, amount, pos_adjust) |
| 599 | register FRAME_PTR frame; |
| 600 | int from, end, amount, pos_adjust; |
| 601 | { |
| 602 | register int i; |
| 603 | register struct frame_glyphs *current_frame |
| 604 | = FRAME_CURRENT_GLYPHS (frame); |
| 605 | |
| 606 | if (!line_ins_del_ok) |
| 607 | return 0; |
| 608 | |
| 609 | if (amount == 0) |
| 610 | return 1; |
| 611 | |
| 612 | if (amount > 0) |
| 613 | { |
| 614 | update_begin (frame); |
| 615 | set_terminal_window (end + amount); |
| 616 | if (!scroll_region_ok) |
| 617 | ins_del_lines (end, -amount); |
| 618 | ins_del_lines (from, amount); |
| 619 | set_terminal_window (0); |
| 620 | |
| 621 | rotate_vector (current_frame->glyphs + from, |
| 622 | sizeof (GLYPH *) * (end + amount - from), |
| 623 | amount * sizeof (GLYPH *)); |
| 624 | |
| 625 | rotate_vector (current_frame->charstarts + from, |
| 626 | sizeof (GLYPH *) * (end + amount - from), |
| 627 | amount * sizeof (GLYPH *)); |
| 628 | |
| 629 | /* Offset each char position in the charstarts lines we moved |
| 630 | by pos_adjust. */ |
| 631 | for (i = from + amount; i < end; i++) |
| 632 | { |
| 633 | int *line = current_frame->charstarts[from]; |
| 634 | int col; |
| 635 | for (col = 0; col < current_frame->used[from]; col++) |
| 636 | line[col] += pos_adjust; |
| 637 | } |
| 638 | for (i = from; i <= from + amount; i++) |
| 639 | { |
| 640 | int *line = current_frame->charstarts[from]; |
| 641 | int col; |
| 642 | line[0] = -1; |
| 643 | for (col = 0; col < current_frame->used[from]; col++) |
| 644 | line[col] = 0; |
| 645 | } |
| 646 | |
| 647 | safe_bcopy (current_frame->used + from, |
| 648 | current_frame->used + from + amount, |
| 649 | (end - from) * sizeof current_frame->used[0]); |
| 650 | |
| 651 | safe_bcopy (current_frame->highlight + from, |
| 652 | current_frame->highlight + from + amount, |
| 653 | (end - from) * sizeof current_frame->highlight[0]); |
| 654 | |
| 655 | safe_bcopy (current_frame->enable + from, |
| 656 | current_frame->enable + from + amount, |
| 657 | (end - from) * sizeof current_frame->enable[0]); |
| 658 | |
| 659 | /* Mark the lines made empty by scrolling as enabled, empty and |
| 660 | normal video. */ |
| 661 | bzero (current_frame->used + from, |
| 662 | amount * sizeof current_frame->used[0]); |
| 663 | bzero (current_frame->highlight + from, |
| 664 | amount * sizeof current_frame->highlight[0]); |
| 665 | for (i = from; i < from + amount; i++) |
| 666 | { |
| 667 | current_frame->glyphs[i][0] = '\0'; |
| 668 | current_frame->charstarts[i][0] = -1; |
| 669 | current_frame->enable[i] = 1; |
| 670 | } |
| 671 | |
| 672 | safe_bcopy (current_frame->bufp + from, |
| 673 | current_frame->bufp + from + amount, |
| 674 | (end - from) * sizeof current_frame->bufp[0]); |
| 675 | |
| 676 | #ifdef HAVE_X_WINDOWS |
| 677 | if (FRAME_X_P (frame)) |
| 678 | { |
| 679 | safe_bcopy (current_frame->top_left_x + from, |
| 680 | current_frame->top_left_x + from + amount, |
| 681 | (end - from) * sizeof current_frame->top_left_x[0]); |
| 682 | |
| 683 | safe_bcopy (current_frame->top_left_y + from, |
| 684 | current_frame->top_left_y + from + amount, |
| 685 | (end - from) * sizeof current_frame->top_left_y[0]); |
| 686 | |
| 687 | safe_bcopy (current_frame->pix_width + from, |
| 688 | current_frame->pix_width + from + amount, |
| 689 | (end - from) * sizeof current_frame->pix_width[0]); |
| 690 | |
| 691 | safe_bcopy (current_frame->pix_height + from, |
| 692 | current_frame->pix_height + from + amount, |
| 693 | (end - from) * sizeof current_frame->pix_height[0]); |
| 694 | |
| 695 | safe_bcopy (current_frame->max_ascent + from, |
| 696 | current_frame->max_ascent + from + amount, |
| 697 | (end - from) * sizeof current_frame->max_ascent[0]); |
| 698 | } |
| 699 | #endif /* HAVE_X_WINDOWS */ |
| 700 | |
| 701 | update_end (frame); |
| 702 | } |
| 703 | if (amount < 0) |
| 704 | { |
| 705 | update_begin (frame); |
| 706 | set_terminal_window (end); |
| 707 | ins_del_lines (from + amount, amount); |
| 708 | if (!scroll_region_ok) |
| 709 | ins_del_lines (end + amount, -amount); |
| 710 | set_terminal_window (0); |
| 711 | |
| 712 | rotate_vector (current_frame->glyphs + from + amount, |
| 713 | sizeof (GLYPH *) * (end - from - amount), |
| 714 | amount * sizeof (GLYPH *)); |
| 715 | |
| 716 | rotate_vector (current_frame->charstarts + from + amount, |
| 717 | sizeof (GLYPH *) * (end - from - amount), |
| 718 | amount * sizeof (GLYPH *)); |
| 719 | |
| 720 | /* Offset each char position in the charstarts lines we moved |
| 721 | by pos_adjust. */ |
| 722 | for (i = from + amount; i < end + amount; i++) |
| 723 | { |
| 724 | int *line = current_frame->charstarts[from]; |
| 725 | int col; |
| 726 | for (col = 0; col < current_frame->used[from]; col++) |
| 727 | line[col] += pos_adjust; |
| 728 | } |
| 729 | for (i = end + amount; i <= end; i++) |
| 730 | { |
| 731 | int *line = current_frame->charstarts[from]; |
| 732 | int col; |
| 733 | line[0] = -1; |
| 734 | for (col = 0; col < current_frame->used[from]; col++) |
| 735 | line[col] = 0; |
| 736 | } |
| 737 | |
| 738 | safe_bcopy (current_frame->used + from, |
| 739 | current_frame->used + from + amount, |
| 740 | (end - from) * sizeof current_frame->used[0]); |
| 741 | |
| 742 | safe_bcopy (current_frame->highlight + from, |
| 743 | current_frame->highlight + from + amount, |
| 744 | (end - from) * sizeof current_frame->highlight[0]); |
| 745 | |
| 746 | safe_bcopy (current_frame->enable + from, |
| 747 | current_frame->enable + from + amount, |
| 748 | (end - from) * sizeof current_frame->enable[0]); |
| 749 | |
| 750 | /* Mark the lines made empty by scrolling as enabled, empty and |
| 751 | normal video. */ |
| 752 | bzero (current_frame->used + end + amount, |
| 753 | - amount * sizeof current_frame->used[0]); |
| 754 | bzero (current_frame->highlight + end + amount, |
| 755 | - amount * sizeof current_frame->highlight[0]); |
| 756 | for (i = end + amount; i < end; i++) |
| 757 | { |
| 758 | current_frame->glyphs[i][0] = '\0'; |
| 759 | current_frame->charstarts[i][0] = 0; |
| 760 | current_frame->enable[i] = 1; |
| 761 | } |
| 762 | |
| 763 | safe_bcopy (current_frame->bufp + from, |
| 764 | current_frame->bufp + from + amount, |
| 765 | (end - from) * sizeof current_frame->bufp[0]); |
| 766 | |
| 767 | #ifdef HAVE_X_WINDOWS |
| 768 | if (FRAME_X_P (frame)) |
| 769 | { |
| 770 | safe_bcopy (current_frame->top_left_x + from, |
| 771 | current_frame->top_left_x + from + amount, |
| 772 | (end - from) * sizeof current_frame->top_left_x[0]); |
| 773 | |
| 774 | safe_bcopy (current_frame->top_left_y + from, |
| 775 | current_frame->top_left_y + from + amount, |
| 776 | (end - from) * sizeof current_frame->top_left_y[0]); |
| 777 | |
| 778 | safe_bcopy (current_frame->pix_width + from, |
| 779 | current_frame->pix_width + from + amount, |
| 780 | (end - from) * sizeof current_frame->pix_width[0]); |
| 781 | |
| 782 | safe_bcopy (current_frame->pix_height + from, |
| 783 | current_frame->pix_height + from + amount, |
| 784 | (end - from) * sizeof current_frame->pix_height[0]); |
| 785 | |
| 786 | safe_bcopy (current_frame->max_ascent + from, |
| 787 | current_frame->max_ascent + from + amount, |
| 788 | (end - from) * sizeof current_frame->max_ascent[0]); |
| 789 | } |
| 790 | #endif /* HAVE_X_WINDOWS */ |
| 791 | |
| 792 | update_end (frame); |
| 793 | } |
| 794 | return 1; |
| 795 | } |
| 796 | \f |
| 797 | /* After updating a window W that isn't the full frame wide, |
| 798 | copy all the columns that W does not occupy |
| 799 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
| 800 | so that update_frame will not change those columns. */ |
| 801 | |
| 802 | preserve_other_columns (w) |
| 803 | struct window *w; |
| 804 | { |
| 805 | register int vpos; |
| 806 | register struct frame_glyphs *current_frame, *desired_frame; |
| 807 | register FRAME_PTR frame = XFRAME (w->frame); |
| 808 | int start = XFASTINT (w->left); |
| 809 | int end = XFASTINT (w->left) + XFASTINT (w->width); |
| 810 | int bot = XFASTINT (w->top) + XFASTINT (w->height); |
| 811 | |
| 812 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
| 813 | desired_frame = FRAME_DESIRED_GLYPHS (frame); |
| 814 | |
| 815 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) |
| 816 | { |
| 817 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
| 818 | { |
| 819 | if (start > 0) |
| 820 | { |
| 821 | int len; |
| 822 | |
| 823 | bcopy (current_frame->glyphs[vpos], |
| 824 | desired_frame->glyphs[vpos], |
| 825 | start * sizeof (current_frame->glyphs[vpos])); |
| 826 | bcopy (current_frame->charstarts[vpos], |
| 827 | desired_frame->charstarts[vpos], |
| 828 | start * sizeof (current_frame->charstarts[vpos])); |
| 829 | len = min (start, current_frame->used[vpos]); |
| 830 | if (desired_frame->used[vpos] < len) |
| 831 | desired_frame->used[vpos] = len; |
| 832 | } |
| 833 | if (current_frame->used[vpos] > end |
| 834 | && desired_frame->used[vpos] < current_frame->used[vpos]) |
| 835 | { |
| 836 | while (desired_frame->used[vpos] < end) |
| 837 | { |
| 838 | int used = desired_frame->used[vpos]++; |
| 839 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; |
| 840 | desired_frame->glyphs[vpos][used] = 0; |
| 841 | } |
| 842 | bcopy (current_frame->glyphs[vpos] + end, |
| 843 | desired_frame->glyphs[vpos] + end, |
| 844 | ((current_frame->used[vpos] - end) |
| 845 | * sizeof (current_frame->glyphs[vpos]))); |
| 846 | bcopy (current_frame->charstarts[vpos] + end, |
| 847 | desired_frame->charstarts[vpos] + end, |
| 848 | ((current_frame->used[vpos] - end) |
| 849 | * sizeof (current_frame->charstarts[vpos]))); |
| 850 | desired_frame->used[vpos] = current_frame->used[vpos]; |
| 851 | } |
| 852 | } |
| 853 | } |
| 854 | } |
| 855 | \f |
| 856 | #if 0 |
| 857 | |
| 858 | /* If window w does not need to be updated and isn't the full frame wide, |
| 859 | copy all the columns that w does occupy |
| 860 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
| 861 | so that update_frame will not change those columns. |
| 862 | |
| 863 | Have not been able to figure out how to use this correctly. */ |
| 864 | |
| 865 | preserve_my_columns (w) |
| 866 | struct window *w; |
| 867 | { |
| 868 | register int vpos, fin; |
| 869 | register struct frame_glyphs *l1, *l2; |
| 870 | register FRAME_PTR frame = XFRAME (w->frame); |
| 871 | int start = XFASTINT (w->left); |
| 872 | int end = XFASTINT (w->left) + XFASTINT (w->width); |
| 873 | int bot = XFASTINT (w->top) + XFASTINT (w->height); |
| 874 | |
| 875 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) |
| 876 | { |
| 877 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
| 878 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) |
| 879 | { |
| 880 | if (l2->length > start && l1->length < l2->length) |
| 881 | { |
| 882 | fin = l2->length; |
| 883 | if (fin > end) fin = end; |
| 884 | while (l1->length < start) |
| 885 | l1->body[l1->length++] = ' '; |
| 886 | bcopy (l2->body + start, l1->body + start, fin - start); |
| 887 | l1->length = fin; |
| 888 | } |
| 889 | } |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | #endif |
| 894 | \f |
| 895 | /* Adjust by ADJUST the charstart values in window W |
| 896 | before vpos VPOS, which counts relative to the frame |
| 897 | (not relative to W itself). */ |
| 898 | |
| 899 | void |
| 900 | adjust_window_charstarts (w, vpos, adjust) |
| 901 | struct window *w; |
| 902 | int vpos; |
| 903 | int adjust; |
| 904 | { |
| 905 | int left = XFASTINT (w->left); |
| 906 | int top = XFASTINT (w->top); |
| 907 | int right = left + window_internal_height (w); |
| 908 | int height = window_internal_height (w); |
| 909 | int i; |
| 910 | |
| 911 | for (i = vpos + 1; i < top + height; i++) |
| 912 | { |
| 913 | int *charstart |
| 914 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; |
| 915 | int j; |
| 916 | for (j = left; j < right; j++) |
| 917 | if (charstart[j] > 0) |
| 918 | charstart[j] += adjust; |
| 919 | } |
| 920 | } |
| 921 | \f |
| 922 | /* On discovering that the redisplay for a window was no good, |
| 923 | cancel the columns of that window, so that when the window is |
| 924 | displayed over again get_display_line will not complain. */ |
| 925 | |
| 926 | cancel_my_columns (w) |
| 927 | struct window *w; |
| 928 | { |
| 929 | register int vpos; |
| 930 | register struct frame_glyphs *desired_glyphs |
| 931 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); |
| 932 | register int start = XFASTINT (w->left); |
| 933 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); |
| 934 | |
| 935 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) |
| 936 | if (desired_glyphs->enable[vpos] |
| 937 | && desired_glyphs->used[vpos] >= start) |
| 938 | desired_glyphs->used[vpos] = start; |
| 939 | } |
| 940 | \f |
| 941 | /* These functions try to perform directly and immediately on the frame |
| 942 | the necessary output for one change in the buffer. |
| 943 | They may return 0 meaning nothing was done if anything is difficult, |
| 944 | or 1 meaning the output was performed properly. |
| 945 | They assume that the frame was up to date before the buffer |
| 946 | change being displayed. They make various other assumptions too; |
| 947 | see command_loop_1 where these are called. */ |
| 948 | |
| 949 | int |
| 950 | direct_output_for_insert (g) |
| 951 | int g; |
| 952 | { |
| 953 | register FRAME_PTR frame = selected_frame; |
| 954 | register struct frame_glyphs *current_frame |
| 955 | = FRAME_CURRENT_GLYPHS (frame); |
| 956 | |
| 957 | #ifndef COMPILER_REGISTER_BUG |
| 958 | register |
| 959 | #endif /* COMPILER_REGISTER_BUG */ |
| 960 | struct window *w = XWINDOW (selected_window); |
| 961 | #ifndef COMPILER_REGISTER_BUG |
| 962 | register |
| 963 | #endif /* COMPILER_REGISTER_BUG */ |
| 964 | int hpos = FRAME_CURSOR_X (frame); |
| 965 | #ifndef COMPILER_REGISTER_BUG |
| 966 | register |
| 967 | #endif /* COMPILER_REGISTER_BUG */ |
| 968 | int vpos = FRAME_CURSOR_Y (frame); |
| 969 | |
| 970 | /* Give up if about to continue line. */ |
| 971 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 |
| 972 | |
| 973 | /* Avoid losing if cursor is in invisible text off left margin */ |
| 974 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) |
| 975 | |
| 976 | /* Give up if cursor outside window (in minibuf, probably) */ |
| 977 | || cursor_in_echo_area |
| 978 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
| 979 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) |
| 980 | |
| 981 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
| 982 | || !display_completed |
| 983 | |
| 984 | /* Give up if buffer appears in two places. */ |
| 985 | || buffer_shared > 1 |
| 986 | |
| 987 | #ifdef USE_TEXT_PROPERTIES |
| 988 | /* Intervals have already been adjusted, point is after the |
| 989 | character that was just inserted. */ |
| 990 | /* Give up if character is invisible. */ |
| 991 | /* Give up if character has a face property. |
| 992 | At the moment we only lose at end of line or end of buffer |
| 993 | and only with faces that have some background */ |
| 994 | /* Instead of wasting time, give up if character has any text properties */ |
| 995 | || ! NILP (Ftext_properties_at (XFASTINT (point - 1), Qnil)) |
| 996 | #endif |
| 997 | |
| 998 | /* Give up if w is minibuffer and a message is being displayed there */ |
| 999 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) |
| 1000 | return 0; |
| 1001 | |
| 1002 | { |
| 1003 | #ifdef HAVE_X_WINDOWS |
| 1004 | int dummy; |
| 1005 | int face = compute_char_face (frame, w, point - 1, -1, -1, &dummy, point); |
| 1006 | #endif |
| 1007 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
| 1008 | current_frame->charstarts[vpos][hpos] = point; |
| 1009 | adjust_window_charstarts (w, vpos, 1); |
| 1010 | } |
| 1011 | unchanged_modified = MODIFF; |
| 1012 | beg_unchanged = GPT - BEG; |
| 1013 | XFASTINT (w->last_point) = point; |
| 1014 | XFASTINT (w->last_point_x) = hpos; |
| 1015 | XFASTINT (w->last_modified) = MODIFF; |
| 1016 | |
| 1017 | reassert_line_highlight (0, vpos); |
| 1018 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
| 1019 | fflush (stdout); |
| 1020 | ++FRAME_CURSOR_X (frame); |
| 1021 | if (hpos == current_frame->used[vpos]) |
| 1022 | { |
| 1023 | current_frame->used[vpos] = hpos + 1; |
| 1024 | current_frame->glyphs[vpos][hpos + 1] = 0; |
| 1025 | } |
| 1026 | |
| 1027 | return 1; |
| 1028 | } |
| 1029 | |
| 1030 | int |
| 1031 | direct_output_forward_char (n) |
| 1032 | int n; |
| 1033 | { |
| 1034 | register FRAME_PTR frame = selected_frame; |
| 1035 | register struct window *w = XWINDOW (selected_window); |
| 1036 | int position; |
| 1037 | int hpos = FRAME_CURSOR_X (frame); |
| 1038 | |
| 1039 | /* Give up if in truncated text at end of line. */ |
| 1040 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1) |
| 1041 | return 0; |
| 1042 | |
| 1043 | /* Avoid losing if cursor is in invisible text off left margin |
| 1044 | or about to go off either side of window. */ |
| 1045 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
| 1046 | && (XINT (w->hscroll) || n < 0)) |
| 1047 | || (n > 0 |
| 1048 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
| 1049 | || cursor_in_echo_area) |
| 1050 | return 0; |
| 1051 | |
| 1052 | /* Can't use direct output if highlighting a region. */ |
| 1053 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) |
| 1054 | return 0; |
| 1055 | |
| 1056 | #ifdef USE_TEXT_PROPERTIES |
| 1057 | /* Don't use direct output next to an invisible character |
| 1058 | since we might need to do something special. */ |
| 1059 | |
| 1060 | XFASTINT (position) = point; |
| 1061 | if (XFASTINT (position) < ZV |
| 1062 | && ! NILP (Fget_char_property (position, |
| 1063 | Qinvisible, |
| 1064 | selected_window))) |
| 1065 | return 0; |
| 1066 | |
| 1067 | XFASTINT (position) = point - 1; |
| 1068 | if (XFASTINT (position) >= BEGV |
| 1069 | && ! NILP (Fget_char_property (position, |
| 1070 | Qinvisible, |
| 1071 | selected_window))) |
| 1072 | return 0; |
| 1073 | #endif |
| 1074 | |
| 1075 | FRAME_CURSOR_X (frame) += n; |
| 1076 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); |
| 1077 | XFASTINT (w->last_point) = point; |
| 1078 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
| 1079 | fflush (stdout); |
| 1080 | |
| 1081 | return 1; |
| 1082 | } |
| 1083 | \f |
| 1084 | static void update_line (); |
| 1085 | |
| 1086 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
| 1087 | Value is nonzero if redisplay stopped due to pending input. |
| 1088 | FORCE nonzero means do not stop for pending input. */ |
| 1089 | |
| 1090 | int |
| 1091 | update_frame (f, force, inhibit_hairy_id) |
| 1092 | FRAME_PTR f; |
| 1093 | int force; |
| 1094 | int inhibit_hairy_id; |
| 1095 | { |
| 1096 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (f); |
| 1097 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (f); |
| 1098 | register int i; |
| 1099 | int pause; |
| 1100 | int preempt_count = baud_rate / 2400 + 1; |
| 1101 | extern input_pending; |
| 1102 | #ifdef HAVE_X_WINDOWS |
| 1103 | register int downto, leftmost; |
| 1104 | #endif |
| 1105 | |
| 1106 | if (preempt_count <= 0) |
| 1107 | preempt_count = 1; |
| 1108 | |
| 1109 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
| 1110 | |
| 1111 | detect_input_pending (); |
| 1112 | if (input_pending && !force) |
| 1113 | { |
| 1114 | pause = 1; |
| 1115 | goto do_pause; |
| 1116 | } |
| 1117 | |
| 1118 | update_begin (f); |
| 1119 | |
| 1120 | if (!line_ins_del_ok) |
| 1121 | inhibit_hairy_id = 1; |
| 1122 | |
| 1123 | /* See if any of the desired lines are enabled; don't compute for |
| 1124 | i/d line if just want cursor motion. */ |
| 1125 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
| 1126 | if (desired_frame->enable[i]) |
| 1127 | break; |
| 1128 | |
| 1129 | /* Try doing i/d line, if not yet inhibited. */ |
| 1130 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
| 1131 | force |= scrolling (f); |
| 1132 | |
| 1133 | /* Update the individual lines as needed. Do bottom line first. */ |
| 1134 | |
| 1135 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
| 1136 | update_line (f, FRAME_HEIGHT (f) - 1); |
| 1137 | |
| 1138 | #ifdef HAVE_X_WINDOWS |
| 1139 | if (FRAME_X_P (f)) |
| 1140 | { |
| 1141 | leftmost = downto = f->display.x->internal_border_width; |
| 1142 | if (desired_frame->enable[0]) |
| 1143 | { |
| 1144 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
| 1145 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] |
| 1146 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width |
| 1147 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
| 1148 | current_frame->top_left_x[0] = leftmost; |
| 1149 | current_frame->top_left_y[0] = downto; |
| 1150 | } |
| 1151 | } |
| 1152 | #endif /* HAVE_X_WINDOWS */ |
| 1153 | |
| 1154 | /* Now update the rest of the lines. */ |
| 1155 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
| 1156 | { |
| 1157 | if (desired_frame->enable[i]) |
| 1158 | { |
| 1159 | if (FRAME_TERMCAP_P (f)) |
| 1160 | { |
| 1161 | /* Flush out every so many lines. |
| 1162 | Also flush out if likely to have more than 1k buffered |
| 1163 | otherwise. I'm told that some telnet connections get |
| 1164 | really screwed by more than 1k output at once. */ |
| 1165 | int outq = PENDING_OUTPUT_COUNT (stdout); |
| 1166 | if (outq > 900 |
| 1167 | || (outq > 20 && ((i - 1) % preempt_count == 0))) |
| 1168 | { |
| 1169 | fflush (stdout); |
| 1170 | if (preempt_count == 1) |
| 1171 | { |
| 1172 | #ifdef EMACS_OUTQSIZE |
| 1173 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
| 1174 | /* Probably not a tty. Ignore the error and reset |
| 1175 | * the outq count. */ |
| 1176 | outq = PENDING_OUTPUT_COUNT (stdout); |
| 1177 | #endif |
| 1178 | outq *= 10; |
| 1179 | if (baud_rate >= outq) |
| 1180 | sleep (outq / baud_rate); |
| 1181 | } |
| 1182 | } |
| 1183 | if ((i - 1) % preempt_count == 0) |
| 1184 | detect_input_pending (); |
| 1185 | } |
| 1186 | |
| 1187 | update_line (f, i); |
| 1188 | #ifdef HAVE_X_WINDOWS |
| 1189 | if (FRAME_X_P (f)) |
| 1190 | { |
| 1191 | current_frame->top_left_y[i] = downto; |
| 1192 | current_frame->top_left_x[i] = leftmost; |
| 1193 | } |
| 1194 | #endif /* HAVE_X_WINDOWS */ |
| 1195 | } |
| 1196 | |
| 1197 | #ifdef HAVE_X_WINDOWS |
| 1198 | if (FRAME_X_P (f)) |
| 1199 | downto += current_frame->pix_height[i]; |
| 1200 | #endif |
| 1201 | } |
| 1202 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
| 1203 | |
| 1204 | /* Now just clean up termcap drivers and set cursor, etc. */ |
| 1205 | if (!pause) |
| 1206 | { |
| 1207 | if (cursor_in_echo_area |
| 1208 | && FRAME_HAS_MINIBUF_P (f)) |
| 1209 | { |
| 1210 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
| 1211 | int row, col; |
| 1212 | |
| 1213 | if (cursor_in_echo_area < 0) |
| 1214 | { |
| 1215 | row = top; |
| 1216 | col = 0; |
| 1217 | } |
| 1218 | else |
| 1219 | { |
| 1220 | /* If the minibuffer is several lines high, find the last |
| 1221 | line that has any text on it. */ |
| 1222 | row = FRAME_HEIGHT (f); |
| 1223 | do |
| 1224 | { |
| 1225 | row--; |
| 1226 | if (current_frame->enable[row]) |
| 1227 | col = current_frame->used[row]; |
| 1228 | else |
| 1229 | col = 0; |
| 1230 | } |
| 1231 | while (row > top && col == 0); |
| 1232 | |
| 1233 | if (col >= FRAME_WIDTH (f)) |
| 1234 | { |
| 1235 | col = 0; |
| 1236 | if (row < FRAME_HEIGHT (f) - 1) |
| 1237 | row++; |
| 1238 | } |
| 1239 | } |
| 1240 | |
| 1241 | cursor_to (row, col); |
| 1242 | } |
| 1243 | else |
| 1244 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
| 1245 | FRAME_WIDTH (f) - 1), 0)); |
| 1246 | } |
| 1247 | |
| 1248 | update_end (f); |
| 1249 | |
| 1250 | if (termscript) |
| 1251 | fflush (termscript); |
| 1252 | fflush (stdout); |
| 1253 | |
| 1254 | /* Here if output is preempted because input is detected. */ |
| 1255 | do_pause: |
| 1256 | |
| 1257 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
| 1258 | display_completed = !pause; |
| 1259 | |
| 1260 | bzero (desired_frame->enable, FRAME_HEIGHT (f)); |
| 1261 | return pause; |
| 1262 | } |
| 1263 | |
| 1264 | /* Called when about to quit, to check for doing so |
| 1265 | at an improper time. */ |
| 1266 | |
| 1267 | void |
| 1268 | quit_error_check () |
| 1269 | { |
| 1270 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
| 1271 | return; |
| 1272 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
| 1273 | abort (); |
| 1274 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
| 1275 | abort (); |
| 1276 | } |
| 1277 | \f |
| 1278 | /* Decide what insert/delete line to do, and do it */ |
| 1279 | |
| 1280 | extern void scrolling_1 (); |
| 1281 | |
| 1282 | scrolling (frame) |
| 1283 | FRAME_PTR frame; |
| 1284 | { |
| 1285 | int unchanged_at_top, unchanged_at_bottom; |
| 1286 | int window_size; |
| 1287 | int changed_lines; |
| 1288 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
| 1289 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
| 1290 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
| 1291 | register int i; |
| 1292 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
| 1293 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); |
| 1294 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); |
| 1295 | |
| 1296 | /* Compute hash codes of all the lines. |
| 1297 | Also calculate number of changed lines, |
| 1298 | number of unchanged lines at the beginning, |
| 1299 | and number of unchanged lines at the end. */ |
| 1300 | |
| 1301 | changed_lines = 0; |
| 1302 | unchanged_at_top = 0; |
| 1303 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
| 1304 | for (i = 0; i < FRAME_HEIGHT (frame); i++) |
| 1305 | { |
| 1306 | /* Give up on this scrolling if some old lines are not enabled. */ |
| 1307 | if (!current_frame->enable[i]) |
| 1308 | return 0; |
| 1309 | old_hash[i] = line_hash_code (current_frame, i); |
| 1310 | if (! desired_frame->enable[i]) |
| 1311 | new_hash[i] = old_hash[i]; |
| 1312 | else |
| 1313 | new_hash[i] = line_hash_code (desired_frame, i); |
| 1314 | |
| 1315 | if (old_hash[i] != new_hash[i]) |
| 1316 | { |
| 1317 | changed_lines++; |
| 1318 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
| 1319 | } |
| 1320 | else if (i == unchanged_at_top) |
| 1321 | unchanged_at_top++; |
| 1322 | draw_cost[i] = line_draw_cost (desired_frame, i); |
| 1323 | } |
| 1324 | |
| 1325 | /* If changed lines are few, don't allow preemption, don't scroll. */ |
| 1326 | if (changed_lines < baud_rate / 2400 |
| 1327 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
| 1328 | return 1; |
| 1329 | |
| 1330 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
| 1331 | - unchanged_at_bottom); |
| 1332 | |
| 1333 | if (scroll_region_ok) |
| 1334 | free_at_end_vpos -= unchanged_at_bottom; |
| 1335 | else if (memory_below_frame) |
| 1336 | free_at_end_vpos = -1; |
| 1337 | |
| 1338 | /* If large window, fast terminal and few lines in common between |
| 1339 | current frame and desired frame, don't bother with i/d calc. */ |
| 1340 | if (window_size >= 18 && baud_rate > 2400 |
| 1341 | && (window_size >= |
| 1342 | 10 * scrolling_max_lines_saved (unchanged_at_top, |
| 1343 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
| 1344 | old_hash, new_hash, draw_cost))) |
| 1345 | return 0; |
| 1346 | |
| 1347 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
| 1348 | draw_cost + unchanged_at_top - 1, |
| 1349 | old_hash + unchanged_at_top - 1, |
| 1350 | new_hash + unchanged_at_top - 1, |
| 1351 | free_at_end_vpos - unchanged_at_top); |
| 1352 | |
| 1353 | return 0; |
| 1354 | } |
| 1355 | \f |
| 1356 | /* Return the offset in its buffer of the character at location col, line |
| 1357 | in the given window. */ |
| 1358 | int |
| 1359 | buffer_posn_from_coords (window, col, line) |
| 1360 | struct window *window; |
| 1361 | int col, line; |
| 1362 | { |
| 1363 | int hscroll = XINT (window->hscroll); |
| 1364 | int window_left = XFASTINT (window->left); |
| 1365 | |
| 1366 | /* The actual width of the window is window->width less one for the |
| 1367 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
| 1368 | window. */ |
| 1369 | int window_width = window_internal_width (window) - 1; |
| 1370 | |
| 1371 | int startp = marker_position (window->start); |
| 1372 | |
| 1373 | /* Since compute_motion will only operate on the current buffer, |
| 1374 | we need to save the old one and restore it when we're done. */ |
| 1375 | struct buffer *old_current_buffer = current_buffer; |
| 1376 | struct position *posn; |
| 1377 | |
| 1378 | current_buffer = XBUFFER (window->buffer); |
| 1379 | |
| 1380 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
| 1381 | (window->frame))->bufp to avoid scanning from the very top of |
| 1382 | the window, but it isn't maintained correctly, and I'm not even |
| 1383 | sure I will keep it. */ |
| 1384 | posn = compute_motion (startp, 0, |
| 1385 | (window == XWINDOW (minibuf_window) && startp == 1 |
| 1386 | ? minibuf_prompt_width : 0) |
| 1387 | + (hscroll ? 1 - hscroll : 0), |
| 1388 | ZV, line, col, |
| 1389 | window_width, hscroll, 0); |
| 1390 | |
| 1391 | current_buffer = old_current_buffer; |
| 1392 | |
| 1393 | /* compute_motion considers frame points past the end of a line |
| 1394 | to be *after* the newline, i.e. at the start of the next line. |
| 1395 | This is reasonable, but not really what we want. So if the |
| 1396 | result is on a line below LINE, back it up one character. */ |
| 1397 | if (posn->vpos > line) |
| 1398 | return posn->bufpos - 1; |
| 1399 | else |
| 1400 | return posn->bufpos; |
| 1401 | } |
| 1402 | \f |
| 1403 | static int |
| 1404 | count_blanks (r) |
| 1405 | register GLYPH *r; |
| 1406 | { |
| 1407 | register GLYPH *p = r; |
| 1408 | while (*p++ == SPACEGLYPH); |
| 1409 | return p - r - 1; |
| 1410 | } |
| 1411 | |
| 1412 | static int |
| 1413 | count_match (str1, str2) |
| 1414 | GLYPH *str1, *str2; |
| 1415 | { |
| 1416 | register GLYPH *p1 = str1; |
| 1417 | register GLYPH *p2 = str2; |
| 1418 | while (*p1++ == *p2++); |
| 1419 | return p1 - str1 - 1; |
| 1420 | } |
| 1421 | |
| 1422 | /* Char insertion/deletion cost vector, from term.c */ |
| 1423 | extern int *char_ins_del_vector; |
| 1424 | |
| 1425 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
| 1426 | |
| 1427 | static void |
| 1428 | update_line (frame, vpos) |
| 1429 | register FRAME_PTR frame; |
| 1430 | int vpos; |
| 1431 | { |
| 1432 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; |
| 1433 | int *temp1; |
| 1434 | int tem; |
| 1435 | int osp, nsp, begmatch, endmatch, olen, nlen; |
| 1436 | int save; |
| 1437 | register struct frame_glyphs *current_frame |
| 1438 | = FRAME_CURRENT_GLYPHS (frame); |
| 1439 | register struct frame_glyphs *desired_frame |
| 1440 | = FRAME_DESIRED_GLYPHS (frame); |
| 1441 | |
| 1442 | if (desired_frame->highlight[vpos] |
| 1443 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) |
| 1444 | { |
| 1445 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
| 1446 | (current_frame->enable[vpos] ? |
| 1447 | current_frame->used[vpos] : 0)); |
| 1448 | current_frame->enable[vpos] = 0; |
| 1449 | } |
| 1450 | else |
| 1451 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
| 1452 | |
| 1453 | if (! current_frame->enable[vpos]) |
| 1454 | { |
| 1455 | olen = 0; |
| 1456 | } |
| 1457 | else |
| 1458 | { |
| 1459 | obody = current_frame->glyphs[vpos]; |
| 1460 | olen = current_frame->used[vpos]; |
| 1461 | if (! current_frame->highlight[vpos]) |
| 1462 | { |
| 1463 | if (!must_write_spaces) |
| 1464 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) |
| 1465 | olen--; |
| 1466 | } |
| 1467 | else |
| 1468 | { |
| 1469 | /* For an inverse-video line, remember we gave it |
| 1470 | spaces all the way to the frame edge |
| 1471 | so that the reverse video extends all the way across. */ |
| 1472 | |
| 1473 | while (olen < FRAME_WIDTH (frame) - 1) |
| 1474 | obody[olen++] = SPACEGLYPH; |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | /* One way or another, this will enable the line being updated. */ |
| 1479 | current_frame->enable[vpos] = 1; |
| 1480 | current_frame->used[vpos] = desired_frame->used[vpos]; |
| 1481 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; |
| 1482 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; |
| 1483 | |
| 1484 | #ifdef HAVE_X_WINDOWS |
| 1485 | if (FRAME_X_P (frame)) |
| 1486 | { |
| 1487 | current_frame->pix_width[vpos] |
| 1488 | = current_frame->used[vpos] |
| 1489 | * FONT_WIDTH (frame->display.x->font); |
| 1490 | current_frame->pix_height[vpos] |
| 1491 | = FONT_HEIGHT (frame->display.x->font); |
| 1492 | } |
| 1493 | #endif /* HAVE_X_WINDOWS */ |
| 1494 | |
| 1495 | if (!desired_frame->enable[vpos]) |
| 1496 | { |
| 1497 | nlen = 0; |
| 1498 | goto just_erase; |
| 1499 | } |
| 1500 | |
| 1501 | nbody = desired_frame->glyphs[vpos]; |
| 1502 | nlen = desired_frame->used[vpos]; |
| 1503 | |
| 1504 | /* Pretend trailing spaces are not there at all, |
| 1505 | unless for one reason or another we must write all spaces. */ |
| 1506 | if (! desired_frame->highlight[vpos]) |
| 1507 | { |
| 1508 | if (!must_write_spaces) |
| 1509 | /* We know that the previous character byte contains 0. */ |
| 1510 | while (nbody[nlen - 1] == SPACEGLYPH) |
| 1511 | nlen--; |
| 1512 | } |
| 1513 | else |
| 1514 | { |
| 1515 | /* For an inverse-video line, give it extra trailing spaces |
| 1516 | all the way to the frame edge |
| 1517 | so that the reverse video extends all the way across. */ |
| 1518 | |
| 1519 | while (nlen < FRAME_WIDTH (frame) - 1) |
| 1520 | nbody[nlen++] = SPACEGLYPH; |
| 1521 | } |
| 1522 | |
| 1523 | /* If there's no i/d char, quickly do the best we can without it. */ |
| 1524 | if (!char_ins_del_ok) |
| 1525 | { |
| 1526 | int i,j; |
| 1527 | |
| 1528 | #if 0 |
| 1529 | if (FRAME_X_P (frame)) |
| 1530 | { |
| 1531 | /* Under X, erase everything we are going to rewrite, |
| 1532 | and rewrite everything from the first char that's changed. |
| 1533 | This is part of supporting fonts like Courier |
| 1534 | whose chars can overlap outside the char width. */ |
| 1535 | for (i = 0; i < nlen; i++) |
| 1536 | if (i >= olen || nbody[i] != obody[i]) |
| 1537 | break; |
| 1538 | |
| 1539 | cursor_to (vpos, i); |
| 1540 | if (i != olen) |
| 1541 | clear_end_of_line (olen); |
| 1542 | write_glyphs (nbody + i, nlen - i); |
| 1543 | } |
| 1544 | else |
| 1545 | {} |
| 1546 | #endif /* 0 */ |
| 1547 | for (i = 0; i < nlen; i++) |
| 1548 | { |
| 1549 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ |
| 1550 | { |
| 1551 | cursor_to (vpos, i); |
| 1552 | for (j = 1; (i + j < nlen && |
| 1553 | (i + j >= olen || nbody[i+j] != obody[i+j])); |
| 1554 | j++); |
| 1555 | |
| 1556 | /* Output this run of non-matching chars. */ |
| 1557 | write_glyphs (nbody + i, j); |
| 1558 | i += j - 1; |
| 1559 | |
| 1560 | /* Now find the next non-match. */ |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | /* Clear the rest of the line, or the non-clear part of it. */ |
| 1565 | if (olen > nlen) |
| 1566 | { |
| 1567 | cursor_to (vpos, nlen); |
| 1568 | clear_end_of_line (olen); |
| 1569 | } |
| 1570 | |
| 1571 | /* Exchange contents between current_frame and new_frame. */ |
| 1572 | temp = desired_frame->glyphs[vpos]; |
| 1573 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; |
| 1574 | current_frame->glyphs[vpos] = temp; |
| 1575 | |
| 1576 | /* Exchange charstarts between current_frame and new_frame. */ |
| 1577 | temp1 = desired_frame->charstarts[vpos]; |
| 1578 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; |
| 1579 | current_frame->charstarts[vpos] = temp1; |
| 1580 | |
| 1581 | return; |
| 1582 | } |
| 1583 | |
| 1584 | if (!olen) |
| 1585 | { |
| 1586 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
| 1587 | ? 0 : count_blanks (nbody); |
| 1588 | if (nlen > nsp) |
| 1589 | { |
| 1590 | cursor_to (vpos, nsp); |
| 1591 | write_glyphs (nbody + nsp, nlen - nsp); |
| 1592 | } |
| 1593 | |
| 1594 | /* Exchange contents between current_frame and new_frame. */ |
| 1595 | temp = desired_frame->glyphs[vpos]; |
| 1596 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; |
| 1597 | current_frame->glyphs[vpos] = temp; |
| 1598 | |
| 1599 | /* Exchange charstarts between current_frame and new_frame. */ |
| 1600 | temp1 = desired_frame->charstarts[vpos]; |
| 1601 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; |
| 1602 | current_frame->charstarts[vpos] = temp1; |
| 1603 | |
| 1604 | return; |
| 1605 | } |
| 1606 | |
| 1607 | obody[olen] = 1; |
| 1608 | save = nbody[nlen]; |
| 1609 | nbody[nlen] = 0; |
| 1610 | |
| 1611 | /* Compute number of leading blanks in old and new contents. */ |
| 1612 | osp = count_blanks (obody); |
| 1613 | if (!desired_frame->highlight[vpos]) |
| 1614 | nsp = count_blanks (nbody); |
| 1615 | else |
| 1616 | nsp = 0; |
| 1617 | |
| 1618 | /* Compute number of matching chars starting with first nonblank. */ |
| 1619 | begmatch = count_match (obody + osp, nbody + nsp); |
| 1620 | |
| 1621 | /* Spaces in new match implicit space past the end of old. */ |
| 1622 | /* A bug causing this to be a no-op was fixed in 18.29. */ |
| 1623 | if (!must_write_spaces && osp + begmatch == olen) |
| 1624 | { |
| 1625 | np1 = nbody + nsp; |
| 1626 | while (np1[begmatch] == SPACEGLYPH) |
| 1627 | begmatch++; |
| 1628 | } |
| 1629 | |
| 1630 | /* Avoid doing insert/delete char |
| 1631 | just cause number of leading spaces differs |
| 1632 | when the following text does not match. */ |
| 1633 | if (begmatch == 0 && osp != nsp) |
| 1634 | osp = nsp = min (osp, nsp); |
| 1635 | |
| 1636 | /* Find matching characters at end of line */ |
| 1637 | op1 = obody + olen; |
| 1638 | np1 = nbody + nlen; |
| 1639 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); |
| 1640 | while (op1 > op2 && op1[-1] == np1[-1]) |
| 1641 | { |
| 1642 | op1--; |
| 1643 | np1--; |
| 1644 | } |
| 1645 | endmatch = obody + olen - op1; |
| 1646 | |
| 1647 | /* Put correct value back in nbody[nlen]. |
| 1648 | This is important because direct_output_for_insert |
| 1649 | can write into the line at a later point. |
| 1650 | If this screws up the zero at the end of the line, re-establish it. */ |
| 1651 | nbody[nlen] = save; |
| 1652 | obody[olen] = 0; |
| 1653 | |
| 1654 | /* tem gets the distance to insert or delete. |
| 1655 | endmatch is how many characters we save by doing so. |
| 1656 | Is it worth it? */ |
| 1657 | |
| 1658 | tem = (nlen - nsp) - (olen - osp); |
| 1659 | if (endmatch && tem |
| 1660 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
| 1661 | endmatch = 0; |
| 1662 | |
| 1663 | /* nsp - osp is the distance to insert or delete. |
| 1664 | If that is nonzero, begmatch is known to be nonzero also. |
| 1665 | begmatch + endmatch is how much we save by doing the ins/del. |
| 1666 | Is it worth it? */ |
| 1667 | |
| 1668 | if (nsp != osp |
| 1669 | && (!char_ins_del_ok |
| 1670 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
| 1671 | { |
| 1672 | begmatch = 0; |
| 1673 | endmatch = 0; |
| 1674 | osp = nsp = min (osp, nsp); |
| 1675 | } |
| 1676 | |
| 1677 | /* Now go through the line, inserting, writing and |
| 1678 | deleting as appropriate. */ |
| 1679 | |
| 1680 | if (osp > nsp) |
| 1681 | { |
| 1682 | cursor_to (vpos, nsp); |
| 1683 | delete_glyphs (osp - nsp); |
| 1684 | } |
| 1685 | else if (nsp > osp) |
| 1686 | { |
| 1687 | /* If going to delete chars later in line |
| 1688 | and insert earlier in the line, |
| 1689 | must delete first to avoid losing data in the insert */ |
| 1690 | if (endmatch && nlen < olen + nsp - osp) |
| 1691 | { |
| 1692 | cursor_to (vpos, nlen - endmatch + osp - nsp); |
| 1693 | delete_glyphs (olen + nsp - osp - nlen); |
| 1694 | olen = nlen - (nsp - osp); |
| 1695 | } |
| 1696 | cursor_to (vpos, osp); |
| 1697 | insert_glyphs ((char *)0, nsp - osp); |
| 1698 | } |
| 1699 | olen += nsp - osp; |
| 1700 | |
| 1701 | tem = nsp + begmatch + endmatch; |
| 1702 | if (nlen != tem || olen != tem) |
| 1703 | { |
| 1704 | cursor_to (vpos, nsp + begmatch); |
| 1705 | if (!endmatch || nlen == olen) |
| 1706 | { |
| 1707 | /* If new text being written reaches right margin, |
| 1708 | there is no need to do clear-to-eol at the end. |
| 1709 | (and it would not be safe, since cursor is not |
| 1710 | going to be "at the margin" after the text is done) */ |
| 1711 | if (nlen == FRAME_WIDTH (frame)) |
| 1712 | olen = 0; |
| 1713 | write_glyphs (nbody + nsp + begmatch, nlen - tem); |
| 1714 | |
| 1715 | #ifdef obsolete |
| 1716 | |
| 1717 | /* the following code loses disastrously if tem == nlen. |
| 1718 | Rather than trying to fix that case, I am trying the simpler |
| 1719 | solution found above. */ |
| 1720 | |
| 1721 | /* If the text reaches to the right margin, |
| 1722 | it will lose one way or another (depending on AutoWrap) |
| 1723 | to clear to end of line after outputting all the text. |
| 1724 | So pause with one character to go and clear the line then. */ |
| 1725 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
| 1726 | { |
| 1727 | /* endmatch must be zero, and tem must equal nsp + begmatch */ |
| 1728 | write_glyphs (nbody + tem, nlen - tem - 1); |
| 1729 | clear_end_of_line (olen); |
| 1730 | olen = 0; /* Don't let it be cleared again later */ |
| 1731 | write_glyphs (nbody + nlen - 1, 1); |
| 1732 | } |
| 1733 | else |
| 1734 | write_glyphs (nbody + nsp + begmatch, nlen - tem); |
| 1735 | #endif /* OBSOLETE */ |
| 1736 | |
| 1737 | } |
| 1738 | else if (nlen > olen) |
| 1739 | { |
| 1740 | write_glyphs (nbody + nsp + begmatch, olen - tem); |
| 1741 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); |
| 1742 | olen = nlen; |
| 1743 | } |
| 1744 | else if (olen > nlen) |
| 1745 | { |
| 1746 | write_glyphs (nbody + nsp + begmatch, nlen - tem); |
| 1747 | delete_glyphs (olen - nlen); |
| 1748 | olen = nlen; |
| 1749 | } |
| 1750 | } |
| 1751 | |
| 1752 | just_erase: |
| 1753 | /* If any unerased characters remain after the new line, erase them. */ |
| 1754 | if (olen > nlen) |
| 1755 | { |
| 1756 | cursor_to (vpos, nlen); |
| 1757 | clear_end_of_line (olen); |
| 1758 | } |
| 1759 | |
| 1760 | /* Exchange contents between current_frame and new_frame. */ |
| 1761 | temp = desired_frame->glyphs[vpos]; |
| 1762 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; |
| 1763 | current_frame->glyphs[vpos] = temp; |
| 1764 | |
| 1765 | /* Exchange charstarts between current_frame and new_frame. */ |
| 1766 | temp1 = desired_frame->charstarts[vpos]; |
| 1767 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; |
| 1768 | current_frame->charstarts[vpos] = temp1; |
| 1769 | } |
| 1770 | \f |
| 1771 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
| 1772 | 1, 1, "FOpen termscript file: ", |
| 1773 | "Start writing all terminal output to FILE as well as the terminal.\n\ |
| 1774 | FILE = nil means just close any termscript file currently open.") |
| 1775 | (file) |
| 1776 | Lisp_Object file; |
| 1777 | { |
| 1778 | if (termscript != 0) fclose (termscript); |
| 1779 | termscript = 0; |
| 1780 | |
| 1781 | if (! NILP (file)) |
| 1782 | { |
| 1783 | file = Fexpand_file_name (file, Qnil); |
| 1784 | termscript = fopen (XSTRING (file)->data, "w"); |
| 1785 | if (termscript == 0) |
| 1786 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
| 1787 | } |
| 1788 | return Qnil; |
| 1789 | } |
| 1790 | \f |
| 1791 | |
| 1792 | #ifdef SIGWINCH |
| 1793 | SIGTYPE |
| 1794 | window_change_signal () |
| 1795 | { |
| 1796 | int width, height; |
| 1797 | extern int errno; |
| 1798 | int old_errno = errno; |
| 1799 | |
| 1800 | get_frame_size (&width, &height); |
| 1801 | |
| 1802 | /* The frame size change obviously applies to a termcap-controlled |
| 1803 | frame. Find such a frame in the list, and assume it's the only |
| 1804 | one (since the redisplay code always writes to stdout, not a |
| 1805 | FILE * specified in the frame structure). Record the new size, |
| 1806 | but don't reallocate the data structures now. Let that be done |
| 1807 | later outside of the signal handler. */ |
| 1808 | |
| 1809 | { |
| 1810 | Lisp_Object tail, frame; |
| 1811 | |
| 1812 | FOR_EACH_FRAME (tail, frame) |
| 1813 | { |
| 1814 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
| 1815 | { |
| 1816 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
| 1817 | break; |
| 1818 | } |
| 1819 | } |
| 1820 | } |
| 1821 | |
| 1822 | signal (SIGWINCH, window_change_signal); |
| 1823 | errno = old_errno; |
| 1824 | } |
| 1825 | #endif /* SIGWINCH */ |
| 1826 | |
| 1827 | |
| 1828 | /* Do any change in frame size that was requested by a signal. */ |
| 1829 | |
| 1830 | do_pending_window_change () |
| 1831 | { |
| 1832 | /* If window_change_signal should have run before, run it now. */ |
| 1833 | while (delayed_size_change) |
| 1834 | { |
| 1835 | Lisp_Object tail, frame; |
| 1836 | |
| 1837 | delayed_size_change = 0; |
| 1838 | |
| 1839 | FOR_EACH_FRAME (tail, frame) |
| 1840 | { |
| 1841 | FRAME_PTR f = XFRAME (frame); |
| 1842 | |
| 1843 | int height = FRAME_NEW_HEIGHT (f); |
| 1844 | int width = FRAME_NEW_WIDTH (f); |
| 1845 | |
| 1846 | if (height != 0 || width != 0) |
| 1847 | change_frame_size (f, height, width, 0, 0); |
| 1848 | } |
| 1849 | } |
| 1850 | } |
| 1851 | |
| 1852 | |
| 1853 | /* Change the frame height and/or width. Values may be given as zero to |
| 1854 | indicate no change is to take place. |
| 1855 | |
| 1856 | If DELAY is non-zero, then assume we're being called from a signal |
| 1857 | handler, and queue the change for later - perhaps the next |
| 1858 | redisplay. Since this tries to resize windows, we can't call it |
| 1859 | from a signal handler. */ |
| 1860 | |
| 1861 | change_frame_size (frame, newheight, newwidth, pretend, delay) |
| 1862 | register FRAME_PTR frame; |
| 1863 | int newheight, newwidth, pretend; |
| 1864 | { |
| 1865 | /* If we can't deal with the change now, queue it for later. */ |
| 1866 | if (delay) |
| 1867 | { |
| 1868 | FRAME_NEW_HEIGHT (frame) = newheight; |
| 1869 | FRAME_NEW_WIDTH (frame) = newwidth; |
| 1870 | delayed_size_change = 1; |
| 1871 | return; |
| 1872 | } |
| 1873 | |
| 1874 | /* This size-change overrides any pending one for this frame. */ |
| 1875 | FRAME_NEW_HEIGHT (frame) = 0; |
| 1876 | FRAME_NEW_WIDTH (frame) = 0; |
| 1877 | |
| 1878 | /* If an argument is zero, set it to the current value. */ |
| 1879 | newheight || (newheight = FRAME_HEIGHT (frame)); |
| 1880 | newwidth || (newwidth = FRAME_WIDTH (frame)); |
| 1881 | |
| 1882 | /* Round up to the smallest acceptable size. */ |
| 1883 | check_frame_size (frame, &newheight, &newwidth); |
| 1884 | |
| 1885 | /* If we're not changing the frame size, quit now. */ |
| 1886 | if (newheight == FRAME_HEIGHT (frame) |
| 1887 | && newwidth == FRAME_WIDTH (frame)) |
| 1888 | return; |
| 1889 | |
| 1890 | if (newheight != FRAME_HEIGHT (frame)) |
| 1891 | { |
| 1892 | if (FRAME_HAS_MINIBUF_P (frame) |
| 1893 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
| 1894 | { |
| 1895 | /* Frame has both root and minibuffer. */ |
| 1896 | set_window_height (FRAME_ROOT_WINDOW (frame), |
| 1897 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
| 1898 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
| 1899 | = newheight - 1; |
| 1900 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
| 1901 | } |
| 1902 | else |
| 1903 | /* Frame has just one top-level window. */ |
| 1904 | set_window_height (FRAME_ROOT_WINDOW (frame), |
| 1905 | newheight - FRAME_MENU_BAR_LINES (frame), 0); |
| 1906 | |
| 1907 | if (FRAME_TERMCAP_P (frame) && !pretend) |
| 1908 | FrameRows = newheight; |
| 1909 | |
| 1910 | #if 0 |
| 1911 | if (frame->output_method == output_termcap) |
| 1912 | { |
| 1913 | frame_height = newheight; |
| 1914 | if (!pretend) |
| 1915 | FrameRows = newheight; |
| 1916 | } |
| 1917 | #endif |
| 1918 | } |
| 1919 | |
| 1920 | if (newwidth != FRAME_WIDTH (frame)) |
| 1921 | { |
| 1922 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
| 1923 | if (FRAME_HAS_MINIBUF_P (frame)) |
| 1924 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
| 1925 | |
| 1926 | if (FRAME_TERMCAP_P (frame) && !pretend) |
| 1927 | FrameCols = newwidth; |
| 1928 | #if 0 |
| 1929 | if (frame->output_method == output_termcap) |
| 1930 | { |
| 1931 | frame_width = newwidth; |
| 1932 | if (!pretend) |
| 1933 | FrameCols = newwidth; |
| 1934 | } |
| 1935 | #endif |
| 1936 | } |
| 1937 | |
| 1938 | FRAME_HEIGHT (frame) = newheight; |
| 1939 | FRAME_WIDTH (frame) = newwidth; |
| 1940 | |
| 1941 | remake_frame_glyphs (frame); |
| 1942 | calculate_costs (frame); |
| 1943 | } |
| 1944 | \f |
| 1945 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
| 1946 | Ssend_string_to_terminal, 1, 1, 0, |
| 1947 | "Send STRING to the terminal without alteration.\n\ |
| 1948 | Control characters in STRING will have terminal-dependent effects.") |
| 1949 | (str) |
| 1950 | Lisp_Object str; |
| 1951 | { |
| 1952 | CHECK_STRING (str, 0); |
| 1953 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); |
| 1954 | fflush (stdout); |
| 1955 | if (termscript) |
| 1956 | { |
| 1957 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); |
| 1958 | fflush (termscript); |
| 1959 | } |
| 1960 | return Qnil; |
| 1961 | } |
| 1962 | |
| 1963 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
| 1964 | "Beep, or flash the screen.\n\ |
| 1965 | Also, unless an argument is given,\n\ |
| 1966 | terminate any keyboard macro currently executing.") |
| 1967 | (arg) |
| 1968 | Lisp_Object arg; |
| 1969 | { |
| 1970 | if (!NILP (arg)) |
| 1971 | { |
| 1972 | if (noninteractive) |
| 1973 | putchar (07); |
| 1974 | else |
| 1975 | ring_bell (); |
| 1976 | fflush (stdout); |
| 1977 | } |
| 1978 | else |
| 1979 | bitch_at_user (); |
| 1980 | |
| 1981 | return Qnil; |
| 1982 | } |
| 1983 | |
| 1984 | bitch_at_user () |
| 1985 | { |
| 1986 | if (noninteractive) |
| 1987 | putchar (07); |
| 1988 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
| 1989 | error ("Keyboard macro terminated by a command ringing the bell"); |
| 1990 | else |
| 1991 | ring_bell (); |
| 1992 | fflush (stdout); |
| 1993 | } |
| 1994 | |
| 1995 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
| 1996 | "Pause, without updating display, for SECONDS seconds.\n\ |
| 1997 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
| 1998 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ |
| 1999 | additional wait period, in milliseconds; this may be useful if your\n\ |
| 2000 | Emacs was built without floating point support.\n\ |
| 2001 | \(Not all operating systems support waiting for a fraction of a second.)") |
| 2002 | (seconds, milliseconds) |
| 2003 | Lisp_Object seconds, milliseconds; |
| 2004 | { |
| 2005 | int sec, usec; |
| 2006 | |
| 2007 | if (NILP (milliseconds)) |
| 2008 | XSET (milliseconds, Lisp_Int, 0); |
| 2009 | else |
| 2010 | CHECK_NUMBER (milliseconds, 1); |
| 2011 | usec = XINT (milliseconds) * 1000; |
| 2012 | |
| 2013 | #ifdef LISP_FLOAT_TYPE |
| 2014 | { |
| 2015 | double duration = extract_float (seconds); |
| 2016 | sec = (int) duration; |
| 2017 | usec += (duration - sec) * 1000000; |
| 2018 | } |
| 2019 | #else |
| 2020 | CHECK_NUMBER (seconds, 0); |
| 2021 | sec = XINT (seconds); |
| 2022 | #endif |
| 2023 | |
| 2024 | #ifndef EMACS_HAS_USECS |
| 2025 | if (sec == 0 && usec != 0) |
| 2026 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
| 2027 | #endif |
| 2028 | |
| 2029 | /* Assure that 0 <= usec < 1000000. */ |
| 2030 | if (usec < 0) |
| 2031 | { |
| 2032 | /* We can't rely on the rounding being correct if user is negative. */ |
| 2033 | if (-1000000 < usec) |
| 2034 | sec--, usec += 1000000; |
| 2035 | else |
| 2036 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); |
| 2037 | } |
| 2038 | else |
| 2039 | sec += usec / 1000000, usec %= 1000000; |
| 2040 | |
| 2041 | if (sec <= 0) |
| 2042 | return Qnil; |
| 2043 | |
| 2044 | { |
| 2045 | Lisp_Object zero; |
| 2046 | |
| 2047 | XFASTINT (zero) = 0; |
| 2048 | wait_reading_process_input (sec, usec, zero, 0); |
| 2049 | } |
| 2050 | |
| 2051 | /* We should always have wait_reading_process_input; we have a dummy |
| 2052 | implementation for systems which don't support subprocesses. */ |
| 2053 | #if 0 |
| 2054 | /* No wait_reading_process_input */ |
| 2055 | immediate_quit = 1; |
| 2056 | QUIT; |
| 2057 | |
| 2058 | #ifdef VMS |
| 2059 | sys_sleep (sec); |
| 2060 | #else /* not VMS */ |
| 2061 | /* The reason this is done this way |
| 2062 | (rather than defined (H_S) && defined (H_T)) |
| 2063 | is because the VMS preprocessor doesn't grok `defined' */ |
| 2064 | #ifdef HAVE_SELECT |
| 2065 | EMACS_GET_TIME (end_time); |
| 2066 | EMACS_SET_SECS_USECS (timeout, sec, usec); |
| 2067 | EMACS_ADD_TIME (end_time, end_time, timeout); |
| 2068 | |
| 2069 | while (1) |
| 2070 | { |
| 2071 | EMACS_GET_TIME (timeout); |
| 2072 | EMACS_SUB_TIME (timeout, end_time, timeout); |
| 2073 | if (EMACS_TIME_NEG_P (timeout) |
| 2074 | || !select (1, 0, 0, 0, &timeout)) |
| 2075 | break; |
| 2076 | } |
| 2077 | #else /* not HAVE_SELECT */ |
| 2078 | sleep (sec); |
| 2079 | #endif /* HAVE_SELECT */ |
| 2080 | #endif /* not VMS */ |
| 2081 | |
| 2082 | immediate_quit = 0; |
| 2083 | #endif /* no subprocesses */ |
| 2084 | |
| 2085 | return Qnil; |
| 2086 | } |
| 2087 | |
| 2088 | /* This is just like wait_reading_process_input, except that |
| 2089 | it does the redisplay. |
| 2090 | |
| 2091 | It's also much like Fsit_for, except that it can be used for |
| 2092 | waiting for input as well. One differnce is that sit_for |
| 2093 | does not call prepare_menu_bars; Fsit_for does call that. */ |
| 2094 | |
| 2095 | Lisp_Object |
| 2096 | sit_for (sec, usec, reading, display) |
| 2097 | int sec, usec, reading, display; |
| 2098 | { |
| 2099 | Lisp_Object read_kbd; |
| 2100 | |
| 2101 | if (detect_input_pending ()) |
| 2102 | return Qnil; |
| 2103 | |
| 2104 | if (display) |
| 2105 | redisplay_preserve_echo_area (); |
| 2106 | |
| 2107 | if (sec == 0 && usec == 0) |
| 2108 | return Qt; |
| 2109 | |
| 2110 | #ifdef SIGIO |
| 2111 | gobble_input (0); |
| 2112 | #endif |
| 2113 | |
| 2114 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); |
| 2115 | wait_reading_process_input (sec, usec, read_kbd, display); |
| 2116 | |
| 2117 | |
| 2118 | /* wait_reading_process_input should always be available now; it is |
| 2119 | simulated in a simple way on systems that don't support |
| 2120 | subprocesses. */ |
| 2121 | #if 0 |
| 2122 | /* No wait_reading_process_input available. */ |
| 2123 | immediate_quit = 1; |
| 2124 | QUIT; |
| 2125 | |
| 2126 | waitchannels = 1; |
| 2127 | #ifdef VMS |
| 2128 | input_wait_timeout (XINT (arg)); |
| 2129 | #else /* not VMS */ |
| 2130 | #ifndef HAVE_TIMEVAL |
| 2131 | timeout_sec = sec; |
| 2132 | select (1, &waitchannels, 0, 0, &timeout_sec); |
| 2133 | #else /* HAVE_TIMEVAL */ |
| 2134 | timeout.tv_sec = sec; |
| 2135 | timeout.tv_usec = usec; |
| 2136 | select (1, &waitchannels, 0, 0, &timeout); |
| 2137 | #endif /* HAVE_TIMEVAL */ |
| 2138 | #endif /* not VMS */ |
| 2139 | |
| 2140 | immediate_quit = 0; |
| 2141 | #endif |
| 2142 | |
| 2143 | return detect_input_pending () ? Qnil : Qt; |
| 2144 | } |
| 2145 | |
| 2146 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
| 2147 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
| 2148 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
| 2149 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ |
| 2150 | additional wait period, in milliseconds; this may be useful if your\n\ |
| 2151 | Emacs was built without floating point support.\n\ |
| 2152 | \(Not all operating systems support waiting for a fraction of a second.)\n\ |
| 2153 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
| 2154 | Redisplay is preempted as always if input arrives, and does not happen\n\ |
| 2155 | if input is available before it starts.\n\ |
| 2156 | Value is t if waited the full time with no input arriving.") |
| 2157 | (seconds, milliseconds, nodisp) |
| 2158 | Lisp_Object seconds, milliseconds, nodisp; |
| 2159 | { |
| 2160 | int sec, usec; |
| 2161 | |
| 2162 | if (NILP (milliseconds)) |
| 2163 | XSET (milliseconds, Lisp_Int, 0); |
| 2164 | else |
| 2165 | CHECK_NUMBER (milliseconds, 1); |
| 2166 | usec = XINT (milliseconds) * 1000; |
| 2167 | |
| 2168 | #ifdef LISP_FLOAT_TYPE |
| 2169 | { |
| 2170 | double duration = extract_float (seconds); |
| 2171 | sec = (int) duration; |
| 2172 | usec += (duration - sec) * 1000000; |
| 2173 | } |
| 2174 | #else |
| 2175 | CHECK_NUMBER (seconds, 0); |
| 2176 | sec = XINT (seconds); |
| 2177 | #endif |
| 2178 | |
| 2179 | #ifndef EMACS_HAS_USECS |
| 2180 | if (usec != 0 && sec == 0) |
| 2181 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); |
| 2182 | #endif |
| 2183 | |
| 2184 | if (NILP (nodisp)) |
| 2185 | prepare_menu_bars (); |
| 2186 | return sit_for (sec, usec, 0, NILP (nodisp)); |
| 2187 | } |
| 2188 | \f |
| 2189 | char *terminal_type; |
| 2190 | |
| 2191 | /* Initialization done when Emacs fork is started, before doing stty. */ |
| 2192 | /* Determine terminal type and set terminal_driver */ |
| 2193 | /* Then invoke its decoding routine to set up variables |
| 2194 | in the terminal package */ |
| 2195 | |
| 2196 | init_display () |
| 2197 | { |
| 2198 | #ifdef HAVE_X_WINDOWS |
| 2199 | extern int display_arg; |
| 2200 | #endif |
| 2201 | |
| 2202 | meta_key = 0; |
| 2203 | inverse_video = 0; |
| 2204 | cursor_in_echo_area = 0; |
| 2205 | terminal_type = (char *) 0; |
| 2206 | |
| 2207 | /* Now is the time to initialize this; it's used by init_sys_modes |
| 2208 | during startup. */ |
| 2209 | Vwindow_system = Qnil; |
| 2210 | |
| 2211 | /* If the user wants to use a window system, we shouldn't bother |
| 2212 | initializing the terminal. This is especially important when the |
| 2213 | terminal is so dumb that emacs gives up before and doesn't bother |
| 2214 | using the window system. |
| 2215 | |
| 2216 | If the DISPLAY environment variable is set, try to use X, and die |
| 2217 | with an error message if that doesn't work. */ |
| 2218 | |
| 2219 | #ifdef HAVE_X_WINDOWS |
| 2220 | if (! display_arg) |
| 2221 | { |
| 2222 | #ifdef VMS |
| 2223 | display_arg = (getenv ("DECW$DISPLAY") != 0); |
| 2224 | #else |
| 2225 | display_arg = (getenv ("DISPLAY") != 0); |
| 2226 | #endif |
| 2227 | } |
| 2228 | |
| 2229 | if (!inhibit_window_system && display_arg) |
| 2230 | { |
| 2231 | Vwindow_system = intern ("x"); |
| 2232 | #ifdef HAVE_X11 |
| 2233 | Vwindow_system_version = make_number (11); |
| 2234 | #else |
| 2235 | Vwindow_system_version = make_number (10); |
| 2236 | #endif |
| 2237 | return; |
| 2238 | } |
| 2239 | #endif /* HAVE_X_WINDOWS */ |
| 2240 | |
| 2241 | /* If no window system has been specified, try to use the terminal. */ |
| 2242 | if (! isatty (0)) |
| 2243 | { |
| 2244 | fprintf (stderr, "emacs: standard input is not a tty\n"); |
| 2245 | exit (1); |
| 2246 | } |
| 2247 | |
| 2248 | /* Look at the TERM variable */ |
| 2249 | terminal_type = (char *) getenv ("TERM"); |
| 2250 | if (!terminal_type) |
| 2251 | { |
| 2252 | #ifdef VMS |
| 2253 | fprintf (stderr, "Please specify your terminal type.\n\ |
| 2254 | For types defined in VMS, use set term /device=TYPE.\n\ |
| 2255 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ |
| 2256 | \(The quotation marks are necessary since terminal types are lower case.)\n"); |
| 2257 | #else |
| 2258 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); |
| 2259 | #endif |
| 2260 | exit (1); |
| 2261 | } |
| 2262 | |
| 2263 | #ifdef VMS |
| 2264 | /* VMS DCL tends to upcase things, so downcase term type. |
| 2265 | Hardly any uppercase letters in terminal types; should be none. */ |
| 2266 | { |
| 2267 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); |
| 2268 | char *p; |
| 2269 | |
| 2270 | strcpy (new, terminal_type); |
| 2271 | |
| 2272 | for (p = new; *p; p++) |
| 2273 | if (isupper (*p)) |
| 2274 | *p = tolower (*p); |
| 2275 | |
| 2276 | terminal_type = new; |
| 2277 | } |
| 2278 | #endif |
| 2279 | |
| 2280 | term_init (terminal_type); |
| 2281 | |
| 2282 | remake_frame_glyphs (selected_frame); |
| 2283 | calculate_costs (selected_frame); |
| 2284 | |
| 2285 | /* X and Y coordinates of the cursor between updates. */ |
| 2286 | FRAME_CURSOR_X (selected_frame) = 0; |
| 2287 | FRAME_CURSOR_Y (selected_frame) = 0; |
| 2288 | |
| 2289 | #ifdef SIGWINCH |
| 2290 | #ifndef CANNOT_DUMP |
| 2291 | if (initialized) |
| 2292 | #endif /* CANNOT_DUMP */ |
| 2293 | signal (SIGWINCH, window_change_signal); |
| 2294 | #endif /* SIGWINCH */ |
| 2295 | } |
| 2296 | \f |
| 2297 | syms_of_display () |
| 2298 | { |
| 2299 | #ifdef MULTI_FRAME |
| 2300 | defsubr (&Sredraw_frame); |
| 2301 | #endif |
| 2302 | defsubr (&Sredraw_display); |
| 2303 | defsubr (&Sopen_termscript); |
| 2304 | defsubr (&Sding); |
| 2305 | defsubr (&Ssit_for); |
| 2306 | defsubr (&Ssleep_for); |
| 2307 | defsubr (&Ssend_string_to_terminal); |
| 2308 | |
| 2309 | DEFVAR_INT ("baud-rate", &baud_rate, |
| 2310 | "The output baud rate of the terminal.\n\ |
| 2311 | On most systems, changing this value will affect the amount of padding\n\ |
| 2312 | and the other strategic decisions made during redisplay."); |
| 2313 | DEFVAR_BOOL ("inverse-video", &inverse_video, |
| 2314 | "*Non-nil means invert the entire frame display.\n\ |
| 2315 | This means everything is in inverse video which otherwise would not be."); |
| 2316 | DEFVAR_BOOL ("visible-bell", &visible_bell, |
| 2317 | "*Non-nil means try to flash the frame to represent a bell."); |
| 2318 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
| 2319 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
| 2320 | A non-nil value is useful if the terminal can automatically preserve\n\ |
| 2321 | Emacs's frame display when you reenter Emacs.\n\ |
| 2322 | It is up to you to set this variable if your terminal can do that."); |
| 2323 | DEFVAR_LISP ("window-system", &Vwindow_system, |
| 2324 | "A symbol naming the window-system under which Emacs is running\n\ |
| 2325 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); |
| 2326 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, |
| 2327 | "The version number of the window system in use.\n\ |
| 2328 | For X windows, this is 10 or 11."); |
| 2329 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, |
| 2330 | "Non-nil means put cursor in minibuffer, at end of any message there."); |
| 2331 | DEFVAR_LISP ("glyph-table", &Vglyph_table, |
| 2332 | "Table defining how to output a glyph code to the frame.\n\ |
| 2333 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
| 2334 | Each element can be:\n\ |
| 2335 | integer: a glyph code which this glyph is an alias for.\n\ |
| 2336 | string: output this glyph using that string (not impl. in X windows).\n\ |
| 2337 | nil: this glyph mod 256 is char code to output,\n\ |
| 2338 | and this glyph / 256 is face code for X windows (see `x-set-face')."); |
| 2339 | Vglyph_table = Qnil; |
| 2340 | |
| 2341 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, |
| 2342 | "Display table to use for buffers that specify none.\n\ |
| 2343 | See `buffer-display-table' for more information."); |
| 2344 | Vstandard_display_table = Qnil; |
| 2345 | |
| 2346 | /* Initialize `window-system', unless init_display already decided it. */ |
| 2347 | #ifdef CANNOT_DUMP |
| 2348 | if (noninteractive) |
| 2349 | #endif |
| 2350 | { |
| 2351 | Vwindow_system = Qnil; |
| 2352 | Vwindow_system_version = Qnil; |
| 2353 | } |
| 2354 | } |