Commit | Line | Data |
---|---|---|
993b6404 | 1 | /* Indentation functions. |
88c6e37e GM |
2 | Copyright (C) 1985,86,87,88,93,94,95,98, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
993b6404 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
7c938215 | 9 | the Free Software Foundation; either version 2, or (at your option) |
993b6404 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
993b6404 | 21 | |
18160b98 | 22 | #include <config.h> |
993b6404 JB |
23 | #include "lisp.h" |
24 | #include "buffer.h" | |
a997a7ca | 25 | #include "charset.h" |
fb911777 | 26 | #include "category.h" |
993b6404 | 27 | #include "indent.h" |
2538fae4 | 28 | #include "keyboard.h" |
502b9b64 | 29 | #include "frame.h" |
993b6404 JB |
30 | #include "window.h" |
31 | #include "termchar.h" | |
32 | #include "termopts.h" | |
33 | #include "disptab.h" | |
5a05d3d2 | 34 | #include "intervals.h" |
0aa01123 | 35 | #include "region-cache.h" |
993b6404 JB |
36 | |
37 | /* Indentation can insert tabs if this is non-zero; | |
88c6e37e GM |
38 | otherwise always uses spaces. */ |
39 | ||
993b6404 JB |
40 | int indent_tabs_mode; |
41 | ||
993b6404 JB |
42 | #define CR 015 |
43 | ||
79c2a4fc | 44 | /* These three values memorize the current column to avoid recalculation. */ |
88c6e37e GM |
45 | |
46 | /* Last value returned by current_column. | |
47 | Some things in set last_known_column_point to -1 | |
79c2a4fc | 48 | to mark the memorized value as invalid. */ |
88c6e37e | 49 | |
993b6404 | 50 | int last_known_column; |
88c6e37e GM |
51 | |
52 | /* Value of point when current_column was called. */ | |
53 | ||
993b6404 | 54 | int last_known_column_point; |
88c6e37e GM |
55 | |
56 | /* Value of MODIFF when current_column was called. */ | |
57 | ||
993b6404 JB |
58 | int last_known_column_modified; |
59 | ||
88c6e37e GM |
60 | static int current_column_1 P_ ((void)); |
61 | static int position_indentation P_ ((int)); | |
82d593eb | 62 | |
a997a7ca KH |
63 | /* Cache of beginning of line found by the last call of |
64 | current_column. */ | |
88c6e37e | 65 | |
a997a7ca KH |
66 | int current_column_bol_cache; |
67 | ||
993b6404 JB |
68 | /* Get the display table to use for the current buffer. */ |
69 | ||
d44f12b4 | 70 | struct Lisp_Char_Table * |
993b6404 JB |
71 | buffer_display_table () |
72 | { | |
73 | Lisp_Object thisbuf; | |
74 | ||
75 | thisbuf = current_buffer->display_table; | |
d44f12b4 RS |
76 | if (DISP_TABLE_P (thisbuf)) |
77 | return XCHAR_TABLE (thisbuf); | |
78 | if (DISP_TABLE_P (Vstandard_display_table)) | |
79 | return XCHAR_TABLE (Vstandard_display_table); | |
993b6404 JB |
80 | return 0; |
81 | } | |
82 | \f | |
0aa01123 JB |
83 | /* Width run cache considerations. */ |
84 | ||
85 | /* Return the width of character C under display table DP. */ | |
f845b8b2 | 86 | |
0aa01123 JB |
87 | static int |
88 | character_width (c, dp) | |
89 | int c; | |
d44f12b4 | 90 | struct Lisp_Char_Table *dp; |
0aa01123 JB |
91 | { |
92 | Lisp_Object elt; | |
93 | ||
94 | /* These width computations were determined by examining the cases | |
95 | in display_text_line. */ | |
96 | ||
f845b8b2 | 97 | /* Everything can be handled by the display table, if it's |
0aa01123 | 98 | present and the element is right. */ |
f845b8b2 | 99 | if (dp && (elt = DISP_CHAR_VECTOR (dp, c), VECTORP (elt))) |
0aa01123 JB |
100 | return XVECTOR (elt)->size; |
101 | ||
f845b8b2 RS |
102 | /* Some characters are special. */ |
103 | if (c == '\n' || c == '\t' || c == '\015') | |
104 | return 0; | |
105 | ||
106 | /* Printing characters have width 1. */ | |
0aa01123 JB |
107 | else if (c >= 040 && c < 0177) |
108 | return 1; | |
109 | ||
110 | /* Everybody else (control characters, metacharacters) has other | |
111 | widths. We could return their actual widths here, but they | |
112 | depend on things like ctl_arrow and crud like that, and they're | |
113 | not very common at all. So we'll just claim we don't know their | |
114 | widths. */ | |
115 | else | |
116 | return 0; | |
117 | } | |
118 | ||
119 | /* Return true iff the display table DISPTAB specifies the same widths | |
120 | for characters as WIDTHTAB. We use this to decide when to | |
121 | invalidate the buffer's width_run_cache. */ | |
88c6e37e | 122 | |
0aa01123 JB |
123 | int |
124 | disptab_matches_widthtab (disptab, widthtab) | |
d44f12b4 | 125 | struct Lisp_Char_Table *disptab; |
0aa01123 JB |
126 | struct Lisp_Vector *widthtab; |
127 | { | |
128 | int i; | |
129 | ||
130 | if (widthtab->size != 256) | |
131 | abort (); | |
132 | ||
133 | for (i = 0; i < 256; i++) | |
134 | if (character_width (i, disptab) | |
135 | != XFASTINT (widthtab->contents[i])) | |
136 | return 0; | |
137 | ||
138 | return 1; | |
2ff4775b | 139 | } |
0aa01123 JB |
140 | |
141 | /* Recompute BUF's width table, using the display table DISPTAB. */ | |
88c6e37e | 142 | |
0aa01123 JB |
143 | void |
144 | recompute_width_table (buf, disptab) | |
145 | struct buffer *buf; | |
d44f12b4 | 146 | struct Lisp_Char_Table *disptab; |
0aa01123 JB |
147 | { |
148 | int i; | |
228a2e1a | 149 | struct Lisp_Vector *widthtab; |
0aa01123 | 150 | |
228a2e1a KH |
151 | if (!VECTORP (buf->width_table)) |
152 | buf->width_table = Fmake_vector (make_number (256), make_number (0)); | |
153 | widthtab = XVECTOR (buf->width_table); | |
0aa01123 JB |
154 | if (widthtab->size != 256) |
155 | abort (); | |
156 | ||
157 | for (i = 0; i < 256; i++) | |
228a2e1a | 158 | XSETFASTINT (widthtab->contents[i], character_width (i, disptab)); |
0aa01123 JB |
159 | } |
160 | ||
161 | /* Allocate or free the width run cache, as requested by the current | |
162 | state of current_buffer's cache_long_line_scans variable. */ | |
88c6e37e | 163 | |
0aa01123 JB |
164 | static void |
165 | width_run_cache_on_off () | |
166 | { | |
a997a7ca KH |
167 | if (NILP (current_buffer->cache_long_line_scans) |
168 | /* And, for the moment, this feature doesn't work on multibyte | |
169 | characters. */ | |
170 | || !NILP (current_buffer->enable_multibyte_characters)) | |
0aa01123 JB |
171 | { |
172 | /* It should be off. */ | |
173 | if (current_buffer->width_run_cache) | |
174 | { | |
175 | free_region_cache (current_buffer->width_run_cache); | |
176 | current_buffer->width_run_cache = 0; | |
177 | current_buffer->width_table = Qnil; | |
178 | } | |
179 | } | |
180 | else | |
181 | { | |
182 | /* It should be on. */ | |
183 | if (current_buffer->width_run_cache == 0) | |
2ff4775b | 184 | { |
0aa01123 | 185 | current_buffer->width_run_cache = new_region_cache (); |
0aa01123 JB |
186 | recompute_width_table (current_buffer, buffer_display_table ()); |
187 | } | |
188 | } | |
189 | } | |
190 | ||
191 | \f | |
9a21bb64 RS |
192 | /* Skip some invisible characters starting from POS. |
193 | This includes characters invisible because of text properties | |
194 | and characters invisible because of overlays. | |
195 | ||
196 | If position POS is followed by invisible characters, | |
197 | skip some of them and return the position after them. | |
198 | Otherwise return POS itself. | |
199 | ||
200 | Set *NEXT_BOUNDARY_P to the next position at which | |
201 | it will be necessary to call this function again. | |
202 | ||
203 | Don't scan past TO, and don't set *NEXT_BOUNDARY_P | |
204 | to a value greater than TO. | |
205 | ||
206 | If WINDOW is non-nil, and this buffer is displayed in WINDOW, | |
207 | take account of overlays that apply only in WINDOW. | |
208 | ||
209 | We don't necessarily skip all the invisible characters after POS | |
210 | because that could take a long time. We skip a reasonable number | |
211 | which can be skipped quickly. If there might be more invisible | |
212 | characters immediately following, then *NEXT_BOUNDARY_P | |
213 | will equal the return value. */ | |
214 | ||
8720a429 | 215 | int |
9a21bb64 RS |
216 | skip_invisible (pos, next_boundary_p, to, window) |
217 | int pos; | |
218 | int *next_boundary_p; | |
219 | int to; | |
220 | Lisp_Object window; | |
221 | { | |
2e34157c | 222 | Lisp_Object prop, position, overlay_limit, proplimit; |
9a21bb64 | 223 | Lisp_Object buffer; |
2e34157c | 224 | int end; |
9a21bb64 RS |
225 | |
226 | XSETFASTINT (position, pos); | |
227 | XSETBUFFER (buffer, current_buffer); | |
228 | ||
229 | /* Give faster response for overlay lookup near POS. */ | |
230 | recenter_overlay_lists (current_buffer, pos); | |
231 | ||
232 | /* We must not advance farther than the next overlay change. | |
233 | The overlay change might change the invisible property; | |
234 | or there might be overlay strings to be displayed there. */ | |
235 | overlay_limit = Fnext_overlay_change (position); | |
236 | /* As for text properties, this gives a lower bound | |
237 | for where the invisible text property could change. */ | |
238 | proplimit = Fnext_property_change (position, buffer, Qt); | |
239 | if (XFASTINT (overlay_limit) < XFASTINT (proplimit)) | |
240 | proplimit = overlay_limit; | |
241 | /* PROPLIMIT is now a lower bound for the next change | |
242 | in invisible status. If that is plenty far away, | |
243 | use that lower bound. */ | |
244 | if (XFASTINT (proplimit) > pos + 100 || XFASTINT (proplimit) >= to) | |
245 | *next_boundary_p = XFASTINT (proplimit); | |
246 | /* Otherwise, scan for the next `invisible' property change. */ | |
247 | else | |
248 | { | |
249 | /* Don't scan terribly far. */ | |
250 | XSETFASTINT (proplimit, min (pos + 100, to)); | |
251 | /* No matter what. don't go past next overlay change. */ | |
252 | if (XFASTINT (overlay_limit) < XFASTINT (proplimit)) | |
253 | proplimit = overlay_limit; | |
2e34157c RS |
254 | end = XFASTINT (Fnext_single_property_change (position, Qinvisible, |
255 | buffer, proplimit)); | |
fe0066f5 | 256 | #if 0 |
a997a7ca KH |
257 | /* Don't put the boundary in the middle of multibyte form if |
258 | there is no actual property change. */ | |
259 | if (end == pos + 100 | |
260 | && !NILP (current_buffer->enable_multibyte_characters) | |
261 | && end < ZV) | |
262 | while (pos < end && !CHAR_HEAD_P (POS_ADDR (end))) | |
263 | end--; | |
fe0066f5 | 264 | #endif |
2e34157c | 265 | *next_boundary_p = end; |
9a21bb64 RS |
266 | } |
267 | /* if the `invisible' property is set, we can skip to | |
268 | the next property change */ | |
269 | if (!NILP (window) && EQ (XWINDOW (window)->buffer, buffer)) | |
270 | prop = Fget_char_property (position, Qinvisible, window); | |
271 | else | |
272 | prop = Fget_char_property (position, Qinvisible, buffer); | |
67964c67 | 273 | if (TEXT_PROP_MEANS_INVISIBLE (prop) > NILP (window)) |
9a21bb64 RS |
274 | return *next_boundary_p; |
275 | return pos; | |
276 | } | |
277 | \f | |
012fd715 | 278 | /* If a composition starts at POS/POS_BYTE and it doesn't stride over |
703af3d5 | 279 | POINT, set *LEN / *LEN_BYTE to the character and byte lengths, *WIDTH |
012fd715 KH |
280 | to the width, and return 1. Otherwise, return 0. */ |
281 | ||
282 | static int | |
283 | check_composition (pos, pos_byte, point, len, len_byte, width) | |
284 | int pos, pos_byte, point; | |
285 | int *len, *len_byte, *width; | |
286 | { | |
287 | Lisp_Object prop; | |
288 | int start, end; | |
289 | int id; | |
290 | ||
291 | if (! find_composition (pos, -1, &start, &end, &prop, Qnil) | |
9ee6df62 KH |
292 | || pos != start || point < end |
293 | || !COMPOSITION_VALID_P (start, end, prop)) | |
012fd715 KH |
294 | return 0; |
295 | if ((id = get_composition_id (pos, pos_byte, end - pos, prop, Qnil)) < 0) | |
296 | return 0; | |
297 | ||
298 | *len = COMPOSITION_LENGTH (prop); | |
299 | *len_byte = CHAR_TO_BYTE (end) - pos_byte; | |
300 | *width = composition_table[id]->width; | |
301 | return 1; | |
302 | } | |
303 | \f | |
c9c0f7cf KH |
304 | /* Set variables WIDTH and BYTES for a multibyte sequence starting at P. |
305 | ||
c9c0f7cf KH |
306 | DP is a display table or NULL. |
307 | ||
308 | This macro is used in current_column_1, Fmove_to_column, and | |
309 | compute_motion. */ | |
310 | ||
012fd715 KH |
311 | #define MULTIBYTE_BYTES_WIDTH(p, dp) \ |
312 | do { \ | |
313 | int c; \ | |
314 | \ | |
315 | wide_column = 0; \ | |
316 | c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, bytes); \ | |
317 | if (BYTES_BY_CHAR_HEAD (*p) != bytes) \ | |
318 | width = bytes * 4; \ | |
319 | else \ | |
320 | { \ | |
321 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) \ | |
322 | width = XVECTOR (DISP_CHAR_VECTOR (dp, c))->size; \ | |
323 | else \ | |
324 | width = WIDTH_BY_CHAR_HEAD (*p); \ | |
325 | if (width > 1) \ | |
326 | wide_column = width; \ | |
327 | } \ | |
c9c0f7cf KH |
328 | } while (0) |
329 | ||
993b6404 | 330 | DEFUN ("current-column", Fcurrent_column, Scurrent_column, 0, 0, 0, |
8c1a1077 PJ |
331 | doc: /* Return the horizontal position of point. Beginning of line is column 0. |
332 | This is calculated by adding together the widths of all the displayed | |
333 | representations of the character between the start of the previous line | |
334 | and point. (eg control characters will have a width of 2 or 4, tabs | |
335 | will have a variable width) | |
336 | Ignores finite width of frame, which means that this function may return | |
337 | values greater than (frame-width). | |
338 | Whether the line is visible (if `selective-display' is t) has no effect; | |
339 | however, ^M is treated as end of line when `selective-display' is t. */) | |
340 | () | |
993b6404 JB |
341 | { |
342 | Lisp_Object temp; | |
94d92e9c | 343 | XSETFASTINT (temp, current_column ()); |
993b6404 JB |
344 | return temp; |
345 | } | |
346 | ||
e74928fc JB |
347 | /* Cancel any recorded value of the horizontal position. */ |
348 | ||
c9667ae1 | 349 | void |
e74928fc JB |
350 | invalidate_current_column () |
351 | { | |
352 | last_known_column_point = 0; | |
353 | } | |
354 | ||
993b6404 JB |
355 | int |
356 | current_column () | |
357 | { | |
358 | register int col; | |
359 | register unsigned char *ptr, *stop; | |
360 | register int tab_seen; | |
361 | int post_tab; | |
362 | register int c; | |
363 | register int tab_width = XINT (current_buffer->tab_width); | |
56a98455 | 364 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
d44f12b4 | 365 | register struct Lisp_Char_Table *dp = buffer_display_table (); |
993b6404 | 366 | |
6ec8bbd2 | 367 | if (PT == last_known_column_point |
993b6404 JB |
368 | && MODIFF == last_known_column_modified) |
369 | return last_known_column; | |
370 | ||
813b81b3 RS |
371 | /* If the buffer has overlays, text properties, |
372 | or multibyte characters, use a more general algorithm. */ | |
9a21bb64 RS |
373 | if (BUF_INTERVALS (current_buffer) |
374 | || !NILP (current_buffer->overlays_before) | |
a997a7ca | 375 | || !NILP (current_buffer->overlays_after) |
813b81b3 RS |
376 | || Z != Z_BYTE) |
377 | return current_column_1 (); | |
9a21bb64 RS |
378 | |
379 | /* Scan backwards from point to the previous newline, | |
380 | counting width. Tab characters are the only complicated case. */ | |
381 | ||
993b6404 | 382 | /* Make a pointer for decrementing through the chars before point. */ |
fe0066f5 | 383 | ptr = BYTE_POS_ADDR (PT_BYTE - 1) + 1; |
993b6404 JB |
384 | /* Make a pointer to where consecutive chars leave off, |
385 | going backwards from point. */ | |
6ec8bbd2 | 386 | if (PT == BEGV) |
993b6404 | 387 | stop = ptr; |
6ec8bbd2 | 388 | else if (PT <= GPT || BEGV > GPT) |
993b6404 JB |
389 | stop = BEGV_ADDR; |
390 | else | |
391 | stop = GAP_END_ADDR; | |
392 | ||
88c6e37e GM |
393 | if (tab_width <= 0 || tab_width > 1000) |
394 | tab_width = 8; | |
993b6404 JB |
395 | |
396 | col = 0, tab_seen = 0, post_tab = 0; | |
397 | ||
398 | while (1) | |
399 | { | |
88c6e37e GM |
400 | EMACS_INT i, n; |
401 | Lisp_Object charvec; | |
402 | ||
993b6404 JB |
403 | if (ptr == stop) |
404 | { | |
405 | /* We stopped either for the beginning of the buffer | |
406 | or for the gap. */ | |
407 | if (ptr == BEGV_ADDR) | |
408 | break; | |
88c6e37e | 409 | |
993b6404 JB |
410 | /* It was the gap. Jump back over it. */ |
411 | stop = BEGV_ADDR; | |
412 | ptr = GPT_ADDR; | |
88c6e37e | 413 | |
993b6404 | 414 | /* Check whether that brings us to beginning of buffer. */ |
88c6e37e GM |
415 | if (BEGV >= GPT) |
416 | break; | |
993b6404 JB |
417 | } |
418 | ||
419 | c = *--ptr; | |
88c6e37e GM |
420 | |
421 | if (dp && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
7050d530 | 422 | { |
88c6e37e GM |
423 | charvec = DISP_CHAR_VECTOR (dp, c); |
424 | n = ASIZE (charvec); | |
7050d530 | 425 | } |
88c6e37e | 426 | else |
993b6404 | 427 | { |
88c6e37e GM |
428 | charvec = Qnil; |
429 | n = 1; | |
430 | } | |
431 | ||
432 | for (i = n - 1; i >= 0; --i) | |
433 | { | |
434 | if (VECTORP (charvec)) | |
435 | { | |
436 | /* This should be handled the same as | |
437 | next_element_from_display_vector does it. */ | |
438 | Lisp_Object entry = AREF (charvec, i); | |
439 | ||
440 | if (INTEGERP (entry) | |
441 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
442 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
443 | else | |
444 | c = ' '; | |
445 | } | |
446 | ||
447 | if (c >= 040 && c < 0177) | |
448 | col++; | |
449 | else if (c == '\n' | |
450 | || (c == '\r' | |
451 | && EQ (current_buffer->selective_display, Qt))) | |
452 | { | |
453 | ptr++; | |
454 | goto start_of_line_found; | |
455 | } | |
456 | else if (c == '\t') | |
457 | { | |
458 | if (tab_seen) | |
459 | col = ((col + tab_width) / tab_width) * tab_width; | |
460 | ||
461 | post_tab += col; | |
462 | col = 0; | |
463 | tab_seen = 1; | |
464 | } | |
f1004faf GM |
465 | else if (VECTORP (charvec)) |
466 | /* With a display table entry, C is displayed as is, and | |
467 | not displayed as \NNN or as ^N. If C is a single-byte | |
468 | character, it takes one column. If C is multi-byte in | |
469 | an unibyte buffer, it's translated to unibyte, so it | |
470 | also takes one column. */ | |
471 | ++col; | |
88c6e37e GM |
472 | else |
473 | col += (ctl_arrow && c < 0200) ? 2 : 4; | |
993b6404 | 474 | } |
993b6404 JB |
475 | } |
476 | ||
88c6e37e GM |
477 | start_of_line_found: |
478 | ||
993b6404 JB |
479 | if (tab_seen) |
480 | { | |
481 | col = ((col + tab_width) / tab_width) * tab_width; | |
482 | col += post_tab; | |
483 | } | |
484 | ||
a997a7ca KH |
485 | if (ptr == BEGV_ADDR) |
486 | current_column_bol_cache = BEGV; | |
487 | else | |
fe0066f5 RS |
488 | current_column_bol_cache = BYTE_TO_CHAR (PTR_BYTE_POS (ptr)); |
489 | ||
993b6404 | 490 | last_known_column = col; |
6ec8bbd2 | 491 | last_known_column_point = PT; |
993b6404 JB |
492 | last_known_column_modified = MODIFF; |
493 | ||
494 | return col; | |
495 | } | |
496 | \f | |
9a21bb64 RS |
497 | /* Return the column number of position POS |
498 | by scanning forward from the beginning of the line. | |
499 | This function handles characters that are invisible | |
500 | due to text properties or overlays. */ | |
501 | ||
502 | static int | |
813b81b3 | 503 | current_column_1 () |
9a21bb64 RS |
504 | { |
505 | register int tab_width = XINT (current_buffer->tab_width); | |
506 | register int ctl_arrow = !NILP (current_buffer->ctl_arrow); | |
507 | register struct Lisp_Char_Table *dp = buffer_display_table (); | |
fe0066f5 | 508 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
9a21bb64 RS |
509 | |
510 | /* Start the scan at the beginning of this line with column number 0. */ | |
511 | register int col = 0; | |
fe0066f5 RS |
512 | int scan, scan_byte; |
513 | int next_boundary, next_boundary_byte; | |
514 | int opoint = PT, opoint_byte = PT_BYTE; | |
515 | ||
813b81b3 | 516 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -1, 1); |
fe0066f5 RS |
517 | current_column_bol_cache = PT; |
518 | scan = PT, scan_byte = PT_BYTE; | |
519 | SET_PT_BOTH (opoint, opoint_byte); | |
520 | next_boundary = scan; | |
521 | next_boundary_byte = scan_byte; | |
9a21bb64 RS |
522 | |
523 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; | |
524 | ||
525 | /* Scan forward to the target position. */ | |
813b81b3 | 526 | while (scan < opoint) |
9a21bb64 RS |
527 | { |
528 | int c; | |
529 | ||
530 | /* Occasionally we may need to skip invisible text. */ | |
531 | while (scan == next_boundary) | |
532 | { | |
fe0066f5 | 533 | int old_scan = scan; |
9a21bb64 RS |
534 | /* This updates NEXT_BOUNDARY to the next place |
535 | where we might need to skip more invisible text. */ | |
813b81b3 RS |
536 | scan = skip_invisible (scan, &next_boundary, opoint, Qnil); |
537 | if (scan >= opoint) | |
9a21bb64 | 538 | goto endloop; |
fe0066f5 RS |
539 | if (scan != old_scan) |
540 | scan_byte = CHAR_TO_BYTE (scan); | |
541 | next_boundary_byte = CHAR_TO_BYTE (next_boundary); | |
9a21bb64 RS |
542 | } |
543 | ||
012fd715 KH |
544 | /* Check composition sequence. */ |
545 | { | |
546 | int len, len_byte, width; | |
547 | ||
548 | if (check_composition (scan, scan_byte, opoint, | |
549 | &len, &len_byte, &width)) | |
550 | { | |
551 | scan += len; | |
552 | scan_byte += len_byte; | |
553 | if (scan <= opoint) | |
554 | col += width; | |
555 | continue; | |
556 | } | |
557 | } | |
558 | ||
813b81b3 | 559 | c = FETCH_BYTE (scan_byte); |
88c6e37e | 560 | |
c9c0f7cf KH |
561 | if (dp != 0 |
562 | && ! (multibyte && BASE_LEADING_CODE_P (c)) | |
563 | && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
9a21bb64 | 564 | { |
d6e483a4 RS |
565 | Lisp_Object charvec; |
566 | EMACS_INT i, n; | |
567 | ||
568 | /* This character is displayed using a vector of glyphs. | |
569 | Update the column based on those glyphs. */ | |
570 | ||
88c6e37e GM |
571 | charvec = DISP_CHAR_VECTOR (dp, c); |
572 | n = ASIZE (charvec); | |
88c6e37e | 573 | |
d6e483a4 | 574 | for (i = 0; i < n; i++) |
88c6e37e GM |
575 | { |
576 | /* This should be handled the same as | |
577 | next_element_from_display_vector does it. */ | |
d6e483a4 RS |
578 | Lisp_Object entry; |
579 | entry = AREF (charvec, i); | |
580 | ||
88c6e37e GM |
581 | if (INTEGERP (entry) |
582 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
583 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
584 | else | |
585 | c = ' '; | |
d6e483a4 RS |
586 | |
587 | if (c == '\n') | |
588 | goto endloop; | |
589 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
590 | goto endloop; | |
591 | if (c == '\t') | |
592 | { | |
593 | int prev_col = col; | |
594 | col += tab_width; | |
595 | col = col / tab_width * tab_width; | |
596 | } | |
597 | else | |
598 | ++col; | |
88c6e37e | 599 | } |
d6e483a4 RS |
600 | } |
601 | else | |
602 | { | |
603 | /* The display table says nothing for this character. | |
604 | Display it as itself. */ | |
605 | ||
88c6e37e GM |
606 | if (c == '\n') |
607 | goto endloop; | |
608 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
609 | goto endloop; | |
88c6e37e GM |
610 | if (c == '\t') |
611 | { | |
612 | int prev_col = col; | |
613 | col += tab_width; | |
614 | col = col / tab_width * tab_width; | |
615 | } | |
616 | else if (multibyte && BASE_LEADING_CODE_P (c)) | |
617 | { | |
618 | unsigned char *ptr; | |
619 | int bytes, width, wide_column; | |
620 | ||
621 | scan_byte--; | |
622 | ptr = BYTE_POS_ADDR (scan_byte); | |
623 | MULTIBYTE_BYTES_WIDTH (ptr, dp); | |
624 | scan_byte += bytes; | |
625 | col += width; | |
626 | } | |
627 | else if (ctl_arrow && (c < 040 || c == 0177)) | |
628 | col += 2; | |
629 | else if (c < 040 || c >= 0177) | |
630 | col += 4; | |
631 | else | |
632 | col++; | |
a997a7ca | 633 | } |
d6e483a4 RS |
634 | scan++; |
635 | scan_byte++; | |
636 | ||
9a21bb64 RS |
637 | } |
638 | endloop: | |
639 | ||
640 | last_known_column = col; | |
6ec8bbd2 | 641 | last_known_column_point = PT; |
9a21bb64 RS |
642 | last_known_column_modified = MODIFF; |
643 | ||
644 | return col; | |
645 | } | |
646 | \f | |
f4a6687d GM |
647 | |
648 | #if 0 /* Not used. */ | |
649 | ||
c412c808 RS |
650 | /* Return the width in columns of the part of STRING from BEG to END. |
651 | If BEG is nil, that stands for the beginning of STRING. | |
652 | If END is nil, that stands for the end of STRING. */ | |
653 | ||
654 | static int | |
382ac0bd | 655 | string_display_width (string, beg, end) |
c412c808 RS |
656 | Lisp_Object string, beg, end; |
657 | { | |
658 | register int col; | |
659 | register unsigned char *ptr, *stop; | |
660 | register int tab_seen; | |
661 | int post_tab; | |
662 | register int c; | |
663 | register int tab_width = XINT (current_buffer->tab_width); | |
664 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); | |
d44f12b4 | 665 | register struct Lisp_Char_Table *dp = buffer_display_table (); |
c412c808 RS |
666 | int b, e; |
667 | ||
668 | if (NILP (end)) | |
669 | e = XSTRING (string)->size; | |
670 | else | |
671 | { | |
b7826503 | 672 | CHECK_NUMBER (end); |
c412c808 RS |
673 | e = XINT (end); |
674 | } | |
675 | ||
676 | if (NILP (beg)) | |
677 | b = 0; | |
678 | else | |
679 | { | |
b7826503 | 680 | CHECK_NUMBER (beg); |
c412c808 RS |
681 | b = XINT (beg); |
682 | } | |
683 | ||
684 | /* Make a pointer for decrementing through the chars before point. */ | |
685 | ptr = XSTRING (string)->data + e; | |
686 | /* Make a pointer to where consecutive chars leave off, | |
687 | going backwards from point. */ | |
688 | stop = XSTRING (string)->data + b; | |
689 | ||
690 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; | |
691 | ||
692 | col = 0, tab_seen = 0, post_tab = 0; | |
693 | ||
694 | while (1) | |
695 | { | |
696 | if (ptr == stop) | |
697 | break; | |
698 | ||
699 | c = *--ptr; | |
700 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
701 | col += XVECTOR (DISP_CHAR_VECTOR (dp, c))->size; | |
702 | else if (c >= 040 && c < 0177) | |
703 | col++; | |
704 | else if (c == '\n') | |
705 | break; | |
706 | else if (c == '\t') | |
707 | { | |
708 | if (tab_seen) | |
709 | col = ((col + tab_width) / tab_width) * tab_width; | |
710 | ||
711 | post_tab += col; | |
712 | col = 0; | |
713 | tab_seen = 1; | |
714 | } | |
715 | else | |
716 | col += (ctl_arrow && c < 0200) ? 2 : 4; | |
717 | } | |
718 | ||
719 | if (tab_seen) | |
720 | { | |
721 | col = ((col + tab_width) / tab_width) * tab_width; | |
722 | col += post_tab; | |
723 | } | |
724 | ||
725 | return col; | |
726 | } | |
f4a6687d GM |
727 | |
728 | #endif /* 0 */ | |
729 | ||
c412c808 | 730 | \f |
993b6404 | 731 | DEFUN ("indent-to", Findent_to, Sindent_to, 1, 2, "NIndent to column: ", |
8c1a1077 PJ |
732 | doc: /* Indent from point with tabs and spaces until COLUMN is reached. |
733 | Optional second argument MININUM says always do at least MININUM spaces | |
734 | even if that goes past COLUMN; by default, MININUM is zero. */) | |
735 | (column, minimum) | |
04c98432 | 736 | Lisp_Object column, minimum; |
993b6404 JB |
737 | { |
738 | int mincol; | |
739 | register int fromcol; | |
740 | register int tab_width = XINT (current_buffer->tab_width); | |
741 | ||
b7826503 | 742 | CHECK_NUMBER (column); |
56a98455 | 743 | if (NILP (minimum)) |
94d92e9c | 744 | XSETFASTINT (minimum, 0); |
b7826503 | 745 | CHECK_NUMBER (minimum); |
993b6404 JB |
746 | |
747 | fromcol = current_column (); | |
748 | mincol = fromcol + XINT (minimum); | |
04c98432 | 749 | if (mincol < XINT (column)) mincol = XINT (column); |
993b6404 JB |
750 | |
751 | if (fromcol == mincol) | |
752 | return make_number (mincol); | |
753 | ||
ccdcf1f5 | 754 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
993b6404 JB |
755 | |
756 | if (indent_tabs_mode) | |
757 | { | |
758 | Lisp_Object n; | |
94d92e9c | 759 | XSETFASTINT (n, mincol / tab_width - fromcol / tab_width); |
993b6404 JB |
760 | if (XFASTINT (n) != 0) |
761 | { | |
6d1bd1a5 | 762 | Finsert_char (make_number ('\t'), n, Qt); |
993b6404 JB |
763 | |
764 | fromcol = (mincol / tab_width) * tab_width; | |
765 | } | |
766 | } | |
767 | ||
04c98432 EN |
768 | XSETFASTINT (column, mincol - fromcol); |
769 | Finsert_char (make_number (' '), column, Qt); | |
993b6404 JB |
770 | |
771 | last_known_column = mincol; | |
6ec8bbd2 | 772 | last_known_column_point = PT; |
993b6404 JB |
773 | last_known_column_modified = MODIFF; |
774 | ||
04c98432 EN |
775 | XSETINT (column, mincol); |
776 | return column; | |
993b6404 | 777 | } |
0aa01123 | 778 | |
993b6404 | 779 | \f |
dfcf069d AS |
780 | static int position_indentation P_ ((int)); |
781 | ||
993b6404 | 782 | DEFUN ("current-indentation", Fcurrent_indentation, Scurrent_indentation, |
8c1a1077 PJ |
783 | 0, 0, 0, |
784 | doc: /* Return the indentation of the current line. | |
785 | This is the horizontal position of the character | |
786 | following any initial whitespace. */) | |
787 | () | |
993b6404 JB |
788 | { |
789 | Lisp_Object val; | |
fe0066f5 RS |
790 | int opoint = PT, opoint_byte = PT_BYTE; |
791 | ||
792 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -1, 1); | |
993b6404 | 793 | |
fe0066f5 RS |
794 | XSETFASTINT (val, position_indentation (PT_BYTE)); |
795 | SET_PT_BOTH (opoint, opoint_byte); | |
993b6404 JB |
796 | return val; |
797 | } | |
798 | ||
fe0066f5 RS |
799 | static int |
800 | position_indentation (pos_byte) | |
801 | register int pos_byte; | |
993b6404 JB |
802 | { |
803 | register int column = 0; | |
804 | register int tab_width = XINT (current_buffer->tab_width); | |
805 | register unsigned char *p; | |
806 | register unsigned char *stop; | |
9a21bb64 | 807 | unsigned char *start; |
fe0066f5 RS |
808 | int next_boundary_byte = pos_byte; |
809 | int ceiling = next_boundary_byte; | |
2ff4775b | 810 | |
ccdcf1f5 | 811 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
2ff4775b | 812 | |
fe0066f5 | 813 | p = BYTE_POS_ADDR (pos_byte); |
9a21bb64 RS |
814 | /* STOP records the value of P at which we will need |
815 | to think about the gap, or about invisible text, | |
816 | or about the end of the buffer. */ | |
817 | stop = p; | |
818 | /* START records the starting value of P. */ | |
819 | start = p; | |
993b6404 JB |
820 | while (1) |
821 | { | |
822 | while (p == stop) | |
823 | { | |
fe0066f5 | 824 | int stop_pos_byte; |
9a21bb64 | 825 | |
fe0066f5 RS |
826 | /* If we have updated P, set POS_BYTE to match. |
827 | The first time we enter the loop, POS_BYTE is already right. */ | |
9a21bb64 | 828 | if (p != start) |
fe0066f5 | 829 | pos_byte = PTR_BYTE_POS (p); |
9a21bb64 | 830 | /* Consider the various reasons STOP might have been set here. */ |
fe0066f5 | 831 | if (pos_byte == ZV_BYTE) |
993b6404 | 832 | return column; |
fe0066f5 RS |
833 | if (pos_byte == next_boundary_byte) |
834 | { | |
835 | int next_boundary; | |
836 | int pos = BYTE_TO_CHAR (pos_byte); | |
837 | pos = skip_invisible (pos, &next_boundary, ZV, Qnil); | |
838 | pos_byte = CHAR_TO_BYTE (pos); | |
839 | next_boundary_byte = CHAR_TO_BYTE (next_boundary); | |
840 | } | |
841 | if (pos_byte >= ceiling) | |
842 | ceiling = BUFFER_CEILING_OF (pos_byte) + 1; | |
9a21bb64 RS |
843 | /* Compute the next place we need to stop and think, |
844 | and set STOP accordingly. */ | |
fe0066f5 | 845 | stop_pos_byte = min (ceiling, next_boundary_byte); |
9a21bb64 | 846 | /* The -1 and +1 arrange to point at the first byte of gap |
fe0066f5 | 847 | (if STOP_POS_BYTE is the position of the gap) |
9a21bb64 RS |
848 | rather than at the data after the gap. */ |
849 | ||
fe0066f5 RS |
850 | stop = BYTE_POS_ADDR (stop_pos_byte - 1) + 1; |
851 | p = BYTE_POS_ADDR (pos_byte); | |
993b6404 JB |
852 | } |
853 | switch (*p++) | |
854 | { | |
fb911777 KH |
855 | case 0240: |
856 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
857 | return column; | |
993b6404 JB |
858 | case ' ': |
859 | column++; | |
860 | break; | |
861 | case '\t': | |
862 | column += tab_width - column % tab_width; | |
863 | break; | |
864 | default: | |
fb911777 KH |
865 | if (ASCII_BYTE_P (p[-1]) |
866 | || NILP (current_buffer->enable_multibyte_characters)) | |
867 | return column; | |
868 | { | |
fe0066f5 RS |
869 | int c; |
870 | pos_byte = PTR_BYTE_POS (p - 1); | |
871 | c = FETCH_MULTIBYTE_CHAR (pos_byte); | |
fb911777 KH |
872 | if (CHAR_HAS_CATEGORY (c, ' ')) |
873 | { | |
874 | column++; | |
fe0066f5 RS |
875 | INC_POS (pos_byte); |
876 | p = BYTE_POS_ADDR (pos_byte); | |
fb911777 KH |
877 | } |
878 | else | |
879 | return column; | |
880 | } | |
993b6404 JB |
881 | } |
882 | } | |
883 | } | |
1b15e576 KH |
884 | |
885 | /* Test whether the line beginning at POS is indented beyond COLUMN. | |
886 | Blank lines are treated as if they had the same indentation as the | |
887 | preceding line. */ | |
fe0066f5 | 888 | |
1b15e576 | 889 | int |
fe0066f5 RS |
890 | indented_beyond_p (pos, pos_byte, column) |
891 | int pos, pos_byte, column; | |
1b15e576 | 892 | { |
d5d6f706 | 893 | int val; |
fe0066f5 RS |
894 | int opoint = PT, opoint_byte = PT_BYTE; |
895 | ||
896 | SET_PT_BOTH (pos, pos_byte); | |
897 | while (PT > BEGV && FETCH_BYTE (PT_BYTE) == '\n') | |
898 | scan_newline (PT - 1, PT_BYTE - 1, BEGV, BEGV_BYTE, -1, 0); | |
899 | ||
d5d6f706 | 900 | val = position_indentation (PT_BYTE); |
fe0066f5 | 901 | SET_PT_BOTH (opoint, opoint_byte); |
8f9db2b7 | 902 | return val >= column; |
1b15e576 | 903 | } |
993b6404 | 904 | \f |
782d260e | 905 | DEFUN ("move-to-column", Fmove_to_column, Smove_to_column, 1, 2, "p", |
8c1a1077 PJ |
906 | doc: /* Move point to column COLUMN in the current line. |
907 | The column of a character is calculated by adding together the widths | |
908 | as displayed of the previous characters in the line. | |
909 | This function ignores line-continuation; | |
910 | there is no upper limit on the column number a character can have | |
911 | and horizontal scrolling has no effect. | |
912 | ||
913 | If specified column is within a character, point goes after that character. | |
914 | If it's past end of line, point goes to end of line. | |
915 | ||
916 | A non-nil second (optional) argument FORCE means, | |
917 | if COLUMN is in the middle of a tab character, change it to spaces. | |
918 | In addition, if FORCE is t, and the line is too short | |
919 | to reach column COLUMN, add spaces/tabs to get there. | |
920 | ||
921 | The return value is the current column. */) | |
922 | (column, force) | |
993b6404 JB |
923 | Lisp_Object column, force; |
924 | { | |
925 | register int pos; | |
926 | register int col = current_column (); | |
927 | register int goal; | |
928 | register int end; | |
929 | register int tab_width = XINT (current_buffer->tab_width); | |
56a98455 | 930 | register int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
d44f12b4 | 931 | register struct Lisp_Char_Table *dp = buffer_display_table (); |
a997a7ca | 932 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
993b6404 JB |
933 | |
934 | Lisp_Object val; | |
6bbd7a29 GM |
935 | int prev_col = 0; |
936 | int c = 0; | |
9a21bb64 RS |
937 | int next_boundary; |
938 | ||
fe0066f5 RS |
939 | int pos_byte, end_byte, next_boundary_byte; |
940 | ||
ccdcf1f5 | 941 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
b7826503 | 942 | CHECK_NATNUM (column); |
993b6404 JB |
943 | goal = XINT (column); |
944 | ||
6ec8bbd2 | 945 | pos = PT; |
fe0066f5 | 946 | pos_byte = PT_BYTE; |
993b6404 | 947 | end = ZV; |
fe0066f5 | 948 | end_byte = ZV_BYTE; |
9a21bb64 | 949 | next_boundary = pos; |
fe0066f5 | 950 | next_boundary_byte = PT_BYTE; |
993b6404 JB |
951 | |
952 | /* If we're starting past the desired column, | |
953 | back up to beginning of line and scan from there. */ | |
954 | if (col > goal) | |
955 | { | |
9a21bb64 | 956 | end = pos; |
a997a7ca | 957 | pos = current_column_bol_cache; |
fe0066f5 | 958 | pos_byte = CHAR_TO_BYTE (pos); |
993b6404 JB |
959 | col = 0; |
960 | } | |
961 | ||
8861f16f | 962 | while (pos < end) |
993b6404 | 963 | { |
9a21bb64 RS |
964 | while (pos == next_boundary) |
965 | { | |
fe0066f5 | 966 | int prev = pos; |
9a21bb64 | 967 | pos = skip_invisible (pos, &next_boundary, end, Qnil); |
fe0066f5 RS |
968 | if (pos != prev) |
969 | pos_byte = CHAR_TO_BYTE (pos); | |
970 | next_boundary_byte = CHAR_TO_BYTE (next_boundary); | |
9a21bb64 RS |
971 | if (pos >= end) |
972 | goto endloop; | |
973 | } | |
974 | ||
8861f16f RS |
975 | /* Test reaching the goal column. We do this after skipping |
976 | invisible characters, so that we put point before the | |
977 | character on which the cursor will appear. */ | |
978 | if (col >= goal) | |
979 | break; | |
980 | ||
012fd715 KH |
981 | /* Check composition sequence. */ |
982 | { | |
983 | int len, len_byte, width; | |
984 | ||
985 | if (check_composition (pos, pos_byte, Z, &len, &len_byte, &width)) | |
986 | { | |
987 | pos += len; | |
988 | pos_byte += len_byte; | |
989 | col += width; | |
990 | continue; | |
991 | } | |
992 | } | |
993 | ||
fe0066f5 | 994 | c = FETCH_BYTE (pos_byte); |
88c6e37e | 995 | |
d6e483a4 RS |
996 | /* See if there is a display table and it relates |
997 | to this character. */ | |
998 | ||
c9c0f7cf KH |
999 | if (dp != 0 |
1000 | && ! (multibyte && BASE_LEADING_CODE_P (c)) | |
1001 | && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
f845b8b2 | 1002 | { |
d6e483a4 RS |
1003 | Lisp_Object charvec; |
1004 | EMACS_INT i, n; | |
1005 | ||
1006 | /* This character is displayed using a vector of glyphs. | |
1007 | Update the position based on those glyphs. */ | |
1008 | ||
88c6e37e GM |
1009 | charvec = DISP_CHAR_VECTOR (dp, c); |
1010 | n = ASIZE (charvec); | |
88c6e37e | 1011 | |
d6e483a4 | 1012 | for (i = 0; i < n; i++) |
88c6e37e GM |
1013 | { |
1014 | /* This should be handled the same as | |
1015 | next_element_from_display_vector does it. */ | |
d6e483a4 RS |
1016 | |
1017 | Lisp_Object entry; | |
1018 | entry = AREF (charvec, i); | |
1019 | ||
88c6e37e GM |
1020 | if (INTEGERP (entry) |
1021 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
1022 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
1023 | else | |
1024 | c = ' '; | |
d6e483a4 RS |
1025 | |
1026 | if (c == '\n') | |
1027 | goto endloop; | |
1028 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
1029 | goto endloop; | |
1030 | if (c == '\t') | |
1031 | { | |
1032 | prev_col = col; | |
1033 | col += tab_width; | |
1034 | col = col / tab_width * tab_width; | |
1035 | } | |
1036 | else | |
1037 | ++col; | |
88c6e37e | 1038 | } |
d6e483a4 RS |
1039 | } |
1040 | else | |
1041 | { | |
1042 | /* The display table doesn't affect this character; | |
1043 | it displays as itself. */ | |
88c6e37e | 1044 | |
88c6e37e GM |
1045 | if (c == '\n') |
1046 | goto endloop; | |
1047 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
1048 | goto endloop; | |
88c6e37e GM |
1049 | if (c == '\t') |
1050 | { | |
1051 | prev_col = col; | |
1052 | col += tab_width; | |
1053 | col = col / tab_width * tab_width; | |
1054 | } | |
1055 | else if (ctl_arrow && (c < 040 || c == 0177)) | |
1056 | col += 2; | |
1057 | else if (c < 040 || c == 0177) | |
1058 | col += 4; | |
1059 | else if (c < 0177) | |
1060 | col++; | |
1061 | else if (multibyte && BASE_LEADING_CODE_P (c)) | |
1062 | { | |
1063 | /* Start of multi-byte form. */ | |
1064 | unsigned char *ptr; | |
1065 | int bytes, width, wide_column; | |
1066 | ||
88c6e37e GM |
1067 | ptr = BYTE_POS_ADDR (pos_byte); |
1068 | MULTIBYTE_BYTES_WIDTH (ptr, dp); | |
d6e483a4 | 1069 | pos_byte += bytes - 1; |
88c6e37e GM |
1070 | col += width; |
1071 | } | |
1072 | else | |
1073 | col += 4; | |
a997a7ca | 1074 | } |
d6e483a4 RS |
1075 | |
1076 | pos++; | |
1077 | pos_byte++; | |
993b6404 | 1078 | } |
9a21bb64 | 1079 | endloop: |
993b6404 | 1080 | |
fe0066f5 | 1081 | SET_PT_BOTH (pos, pos_byte); |
993b6404 JB |
1082 | |
1083 | /* If a tab char made us overshoot, change it to spaces | |
1084 | and scan through it again. */ | |
56a98455 | 1085 | if (!NILP (force) && col > goal && c == '\t' && prev_col < goal) |
993b6404 | 1086 | { |
154a424a GM |
1087 | int goal_pt, goal_pt_byte; |
1088 | ||
1089 | /* Insert spaces in front of the tab to reach GOAL. Do this | |
1090 | first so that a marker at the end of the tab gets | |
1091 | adjusted. */ | |
1092 | SET_PT_BOTH (PT - 1, PT_BYTE - 1); | |
1093 | Finsert_char (make_number (' '), make_number (goal - prev_col), Qt); | |
1094 | ||
1095 | /* Now delete the tab, and indent to COL. */ | |
1096 | del_range (PT, PT + 1); | |
1097 | goal_pt = PT; | |
1098 | goal_pt_byte = PT_BYTE; | |
70ee42f7 | 1099 | Findent_to (make_number (col), Qnil); |
154a424a GM |
1100 | SET_PT_BOTH (goal_pt, goal_pt_byte); |
1101 | ||
5a05d3d2 RS |
1102 | /* Set the last_known... vars consistently. */ |
1103 | col = goal; | |
993b6404 JB |
1104 | } |
1105 | ||
1106 | /* If line ends prematurely, add space to the end. */ | |
de4075cf | 1107 | if (col < goal && EQ (force, Qt)) |
230a4cbd | 1108 | Findent_to (make_number (col = goal), Qnil); |
993b6404 JB |
1109 | |
1110 | last_known_column = col; | |
6ec8bbd2 | 1111 | last_known_column_point = PT; |
993b6404 JB |
1112 | last_known_column_modified = MODIFF; |
1113 | ||
94d92e9c | 1114 | XSETFASTINT (val, col); |
993b6404 JB |
1115 | return val; |
1116 | } | |
1117 | \f | |
0aa01123 JB |
1118 | /* compute_motion: compute buffer posn given screen posn and vice versa */ |
1119 | ||
993b6404 JB |
1120 | struct position val_compute_motion; |
1121 | ||
1122 | /* Scan the current buffer forward from offset FROM, pretending that | |
1123 | this is at line FROMVPOS, column FROMHPOS, until reaching buffer | |
1124 | offset TO or line TOVPOS, column TOHPOS (whichever comes first), | |
0aa01123 JB |
1125 | and return the ending buffer position and screen location. If we |
1126 | can't hit the requested column exactly (because of a tab or other | |
1127 | multi-column character), overshoot. | |
993b6404 | 1128 | |
2ab90d49 KH |
1129 | DID_MOTION is 1 if FROMHPOS has already accounted for overlay strings |
1130 | at FROM. This is the case if FROMVPOS and FROMVPOS came from an | |
1131 | earlier call to compute_motion. The other common case is that FROMHPOS | |
1132 | is zero and FROM is a position that "belongs" at column zero, but might | |
1133 | be shifted by overlay strings; in this case DID_MOTION should be 0. | |
1134 | ||
993b6404 JB |
1135 | WIDTH is the number of columns available to display text; |
1136 | compute_motion uses this to handle continuation lines and such. | |
1137 | HSCROLL is the number of columns not being displayed at the left | |
1138 | margin; this is usually taken from a window's hscroll member. | |
a9764248 JB |
1139 | TAB_OFFSET is the number of columns of the first tab that aren't |
1140 | being displayed, perhaps because of a continuation line or | |
1141 | something. | |
993b6404 JB |
1142 | |
1143 | compute_motion returns a pointer to a struct position. The bufpos | |
1144 | member gives the buffer position at the end of the scan, and hpos | |
0aa01123 JB |
1145 | and vpos give its cartesian location. prevhpos is the column at |
1146 | which the character before bufpos started, and contin is non-zero | |
1147 | if we reached the current line by continuing the previous. | |
1148 | ||
1149 | Note that FROMHPOS and TOHPOS should be expressed in real screen | |
1150 | columns, taking HSCROLL and the truncation glyph at the left margin | |
1151 | into account. That is, beginning-of-line moves you to the hpos | |
1152 | -HSCROLL + (HSCROLL > 0). | |
993b6404 JB |
1153 | |
1154 | For example, to find the buffer position of column COL of line LINE | |
1155 | of a certain window, pass the window's starting location as FROM | |
1156 | and the window's upper-left coordinates as FROMVPOS and FROMHPOS. | |
1157 | Pass the buffer's ZV as TO, to limit the scan to the end of the | |
1158 | visible section of the buffer, and pass LINE and COL as TOVPOS and | |
2ff4775b | 1159 | TOHPOS. |
993b6404 JB |
1160 | |
1161 | When displaying in window w, a typical formula for WIDTH is: | |
1162 | ||
1163 | window_width - 1 | |
a3c87d4e | 1164 | - (has_vertical_scroll_bars |
40284d6b | 1165 | ? FRAME_SCROLL_BAR_COLS (XFRAME (window->frame)) |
fa61c701 | 1166 | : (window_width + window_left != frame_width)) |
993b6404 JB |
1167 | |
1168 | where | |
1169 | window_width is XFASTINT (w->width), | |
1170 | window_left is XFASTINT (w->left), | |
a3c87d4e JB |
1171 | has_vertical_scroll_bars is |
1172 | FRAME_HAS_VERTICAL_SCROLL_BARS (XFRAME (WINDOW_FRAME (window))) | |
fa61c701 | 1173 | and frame_width = FRAME_WIDTH (XFRAME (window->frame)) |
993b6404 | 1174 | |
1827d036 KH |
1175 | Or you can let window_internal_width do this all for you, and write: |
1176 | window_internal_width (w) - 1 | |
fa61c701 JB |
1177 | |
1178 | The `-1' accounts for the continuation-line backslashes; the rest | |
7e7a76b5 | 1179 | accounts for window borders if the window is split horizontally, and |
1827d036 | 1180 | the scroll bars if they are turned on. */ |
993b6404 JB |
1181 | |
1182 | struct position * | |
2ab90d49 | 1183 | compute_motion (from, fromvpos, fromhpos, did_motion, to, tovpos, tohpos, width, hscroll, tab_offset, win) |
993b6404 | 1184 | int from, fromvpos, fromhpos, to, tovpos, tohpos; |
2ab90d49 | 1185 | int did_motion; |
993b6404 JB |
1186 | register int width; |
1187 | int hscroll, tab_offset; | |
88af3af4 | 1188 | struct window *win; |
993b6404 | 1189 | { |
cde9337b JB |
1190 | register int hpos = fromhpos; |
1191 | register int vpos = fromvpos; | |
1192 | ||
993b6404 | 1193 | register int pos; |
fe0066f5 | 1194 | int pos_byte; |
6bbd7a29 | 1195 | register int c = 0; |
993b6404 | 1196 | register int tab_width = XFASTINT (current_buffer->tab_width); |
56a98455 | 1197 | register int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
d44f12b4 | 1198 | register struct Lisp_Char_Table *dp = window_display_table (win); |
993b6404 | 1199 | int selective |
eeaafd4f | 1200 | = (INTEGERP (current_buffer->selective_display) |
69eaf10d RS |
1201 | ? XINT (current_buffer->selective_display) |
1202 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
a997a7ca | 1203 | int prev_hpos = 0; |
993b6404 | 1204 | int selective_rlen |
eeaafd4f | 1205 | = (selective && dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
dea4d2e6 | 1206 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size : 0); |
2ab90d49 KH |
1207 | /* The next location where the `invisible' property changes, or an |
1208 | overlay starts or ends. */ | |
1209 | int next_boundary = from; | |
993b6404 | 1210 | |
0aa01123 JB |
1211 | /* For computing runs of characters with similar widths. |
1212 | Invariant: width_run_width is zero, or all the characters | |
2ff4775b | 1213 | from width_run_start to width_run_end have a fixed width of |
0aa01123 JB |
1214 | width_run_width. */ |
1215 | int width_run_start = from; | |
1216 | int width_run_end = from; | |
1217 | int width_run_width = 0; | |
1218 | Lisp_Object *width_table; | |
66c75ca5 | 1219 | Lisp_Object buffer; |
0aa01123 JB |
1220 | |
1221 | /* The next buffer pos where we should consult the width run cache. */ | |
1222 | int next_width_run = from; | |
0e435804 | 1223 | Lisp_Object window; |
0aa01123 | 1224 | |
a997a7ca | 1225 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
c71c19f4 RS |
1226 | /* If previous char scanned was a wide character, |
1227 | this is the column where it ended. Otherwise, this is 0. */ | |
1228 | int wide_column_end_hpos = 0; | |
a997a7ca | 1229 | int prev_pos; /* Previous buffer position. */ |
fe0066f5 | 1230 | int prev_pos_byte; /* Previous buffer position. */ |
a997a7ca KH |
1231 | int contin_hpos; /* HPOS of last column of continued line. */ |
1232 | int prev_tab_offset; /* Previous tab offset. */ | |
1233 | ||
66c75ca5 | 1234 | XSETBUFFER (buffer, current_buffer); |
0e435804 | 1235 | XSETWINDOW (window, win); |
66c75ca5 | 1236 | |
0aa01123 JB |
1237 | width_run_cache_on_off (); |
1238 | if (dp == buffer_display_table ()) | |
1239 | width_table = (VECTORP (current_buffer->width_table) | |
1240 | ? XVECTOR (current_buffer->width_table)->contents | |
1241 | : 0); | |
1242 | else | |
1243 | /* If the window has its own display table, we can't use the width | |
1244 | run cache, because that's based on the buffer's display table. */ | |
1245 | width_table = 0; | |
1246 | ||
e4500116 GM |
1247 | if (tab_width <= 0 || tab_width > 1000) |
1248 | tab_width = 8; | |
1249 | ||
1250 | immediate_quit = 1; | |
1251 | QUIT; | |
cde9337b | 1252 | |
a997a7ca | 1253 | pos = prev_pos = from; |
fe0066f5 | 1254 | pos_byte = prev_pos_byte = CHAR_TO_BYTE (from); |
a997a7ca KH |
1255 | contin_hpos = 0; |
1256 | prev_tab_offset = tab_offset; | |
2ab90d49 KH |
1257 | while (1) |
1258 | { | |
1259 | while (pos == next_boundary) | |
f75c0f8a | 1260 | { |
fe0066f5 | 1261 | int pos_here = pos; |
98136db3 RS |
1262 | int newpos; |
1263 | ||
f9ba10b0 RS |
1264 | /* Don't skip invisible if we are already at the margin. */ |
1265 | if (vpos > tovpos || vpos == tovpos && hpos >= tohpos) | |
1266 | { | |
1267 | if (contin_hpos && prev_hpos == 0 | |
1268 | && hpos > tohpos | |
1269 | && (contin_hpos == width || wide_column_end_hpos > width)) | |
1270 | { /* Line breaks because we can't put the character at the | |
1271 | previous line any more. It is not the multi-column | |
1272 | character continued in middle. Go back to previous | |
1273 | buffer position, screen position, and set tab offset | |
1274 | to previous value. It's the beginning of the | |
1275 | line. */ | |
1276 | pos = prev_pos; | |
1277 | pos_byte = prev_pos_byte; | |
1278 | hpos = prev_hpos; | |
1279 | tab_offset = prev_tab_offset; | |
1280 | } | |
1281 | break; | |
1282 | } | |
1283 | ||
2ab90d49 KH |
1284 | /* If the caller says that the screen position came from an earlier |
1285 | call to compute_motion, then we've already accounted for the | |
1286 | overlay strings at point. This is only true the first time | |
1287 | through, so clear the flag after testing it. */ | |
1288 | if (!did_motion) | |
1289 | /* We need to skip past the overlay strings. Currently those | |
a997a7ca | 1290 | strings must not contain TAB; |
2ab90d49 KH |
1291 | if we want to relax that restriction, something will have |
1292 | to be changed here. */ | |
a997a7ca KH |
1293 | { |
1294 | unsigned char *ovstr; | |
1295 | int ovlen = overlay_strings (pos, win, &ovstr); | |
4116deee KH |
1296 | hpos += ((multibyte && ovlen > 0) |
1297 | ? strwidth (ovstr, ovlen) : ovlen); | |
a997a7ca | 1298 | } |
2ab90d49 KH |
1299 | did_motion = 0; |
1300 | ||
1301 | if (pos >= to) | |
1302 | break; | |
66c75ca5 | 1303 | |
9a21bb64 RS |
1304 | /* Advance POS past invisible characters |
1305 | (but not necessarily all that there are here), | |
1306 | and store in next_boundary the next position where | |
1307 | we need to call skip_invisible. */ | |
98136db3 RS |
1308 | newpos = skip_invisible (pos, &next_boundary, to, window); |
1309 | ||
1310 | if (newpos >= to) | |
e8cb089b RS |
1311 | { |
1312 | pos = min (to, newpos); | |
bcfbd63d | 1313 | pos_byte = CHAR_TO_BYTE (pos); |
e8cb089b RS |
1314 | goto after_loop; |
1315 | } | |
98136db3 | 1316 | |
fe0066f5 RS |
1317 | if (newpos != pos_here) |
1318 | { | |
1319 | pos = newpos; | |
1320 | pos_byte = CHAR_TO_BYTE (pos); | |
1321 | } | |
f75c0f8a | 1322 | } |
2ab90d49 KH |
1323 | |
1324 | /* Handle right margin. */ | |
a997a7ca KH |
1325 | /* Note on a wide-column character. |
1326 | ||
1327 | Characters are classified into the following three categories | |
1328 | according to the width (columns occupied on screen). | |
1329 | ||
1330 | (1) single-column character: ex. `a' | |
1331 | (2) multi-column character: ex. `^A', TAB, `\033' | |
1332 | (3) wide-column character: ex. Japanese character, Chinese character | |
1333 | (In the following example, `W_' stands for them.) | |
1334 | ||
1335 | Multi-column characters can be divided around the right margin, | |
1336 | but wide-column characters cannot. | |
1337 | ||
1338 | NOTE: | |
1339 | ||
1340 | (*) The cursor is placed on the next character after the point. | |
1341 | ||
1342 | ---------- | |
1343 | abcdefghi\ | |
1344 | j ^---- next after the point | |
1345 | ^--- next char. after the point. | |
1346 | ---------- | |
1347 | In case of sigle-column character | |
1348 | ||
1349 | ---------- | |
1350 | abcdefgh\\ | |
1351 | 033 ^---- next after the point, next char. after the point. | |
1352 | ---------- | |
1353 | In case of multi-column character | |
1354 | ||
1355 | ---------- | |
1356 | abcdefgh\\ | |
1357 | W_ ^---- next after the point | |
1358 | ^---- next char. after the point. | |
1359 | ---------- | |
1360 | In case of wide-column character | |
1361 | ||
1362 | The problem here is continuation at a wide-column character. | |
1363 | In this case, the line may shorter less than WIDTH. | |
1364 | And we find the continuation AFTER it occurs. | |
1365 | ||
1366 | */ | |
1367 | ||
1368 | if (hpos > width) | |
2ab90d49 KH |
1369 | { |
1370 | if (hscroll | |
1371 | || (truncate_partial_width_windows | |
1372 | && width + 1 < FRAME_WIDTH (XFRAME (WINDOW_FRAME (win)))) | |
1373 | || !NILP (current_buffer->truncate_lines)) | |
1374 | { | |
529724fe AS |
1375 | /* Truncating: skip to newline, unless we are already past |
1376 | TO (we need to go back below). */ | |
1377 | if (pos <= to) | |
fe0066f5 RS |
1378 | { |
1379 | pos = find_before_next_newline (pos, to, 1); | |
1380 | pos_byte = CHAR_TO_BYTE (pos); | |
529724fe AS |
1381 | hpos = width; |
1382 | /* If we just skipped next_boundary, | |
1383 | loop around in the main while | |
1384 | and handle it. */ | |
1385 | if (pos >= next_boundary) | |
1386 | next_boundary = pos + 1; | |
1387 | prev_hpos = width; | |
1388 | prev_tab_offset = tab_offset; | |
fe0066f5 | 1389 | } |
2ab90d49 KH |
1390 | } |
1391 | else | |
1392 | { | |
1393 | /* Continuing. */ | |
a997a7ca KH |
1394 | /* Remember the previous value. */ |
1395 | prev_tab_offset = tab_offset; | |
1396 | ||
c9c0f7cf | 1397 | if (wide_column_end_hpos > width) |
a997a7ca KH |
1398 | { |
1399 | hpos -= prev_hpos; | |
1400 | tab_offset += prev_hpos; | |
1401 | } | |
1402 | else | |
1403 | { | |
1404 | tab_offset += width; | |
1405 | hpos -= width; | |
1406 | } | |
1407 | vpos++; | |
1408 | contin_hpos = prev_hpos; | |
1409 | prev_hpos = 0; | |
2ab90d49 KH |
1410 | } |
1411 | } | |
1412 | ||
1413 | /* Stop if past the target buffer position or screen position. */ | |
33fe7d20 | 1414 | if (pos > to) |
a997a7ca KH |
1415 | { |
1416 | /* Go back to the previous position. */ | |
1417 | pos = prev_pos; | |
fe0066f5 | 1418 | pos_byte = prev_pos_byte; |
a997a7ca KH |
1419 | hpos = prev_hpos; |
1420 | tab_offset = prev_tab_offset; | |
1421 | ||
1422 | /* NOTE on contin_hpos, hpos, and prev_hpos. | |
1423 | ||
1424 | ---------- | |
1425 | abcdefgh\\ | |
1426 | W_ ^---- contin_hpos | |
1427 | | ^----- hpos | |
1428 | \---- prev_hpos | |
1429 | ---------- | |
1430 | */ | |
1431 | ||
1432 | if (contin_hpos && prev_hpos == 0 | |
c9c0f7cf | 1433 | && contin_hpos < width && !wide_column_end_hpos) |
a997a7ca KH |
1434 | { |
1435 | /* Line breaking occurs in the middle of multi-column | |
1436 | character. Go back to previous line. */ | |
1437 | hpos = contin_hpos; | |
1438 | vpos = vpos - 1; | |
1439 | } | |
1440 | else if (c == '\n') | |
1441 | /* If previous character is NEWLINE, | |
1442 | set VPOS back to previous line */ | |
1443 | vpos = vpos - 1; | |
1444 | break; | |
1445 | } | |
1446 | ||
33fe7d20 RS |
1447 | if (vpos > tovpos || vpos == tovpos && hpos >= tohpos) |
1448 | { | |
1449 | if (contin_hpos && prev_hpos == 0 | |
9129bcc3 KH |
1450 | && hpos > tohpos |
1451 | && (contin_hpos == width || wide_column_end_hpos > width)) | |
33fe7d20 RS |
1452 | { /* Line breaks because we can't put the character at the |
1453 | previous line any more. It is not the multi-column | |
1454 | character continued in middle. Go back to previous | |
1455 | buffer position, screen position, and set tab offset | |
1456 | to previous value. It's the beginning of the | |
1457 | line. */ | |
1458 | pos = prev_pos; | |
1459 | pos_byte = prev_pos_byte; | |
1460 | hpos = prev_hpos; | |
1461 | tab_offset = prev_tab_offset; | |
1462 | } | |
1463 | break; | |
1464 | } | |
a997a7ca | 1465 | if (pos == ZV) /* We cannot go beyond ZV. Stop here. */ |
2ab90d49 KH |
1466 | break; |
1467 | ||
2ab90d49 | 1468 | prev_hpos = hpos; |
a997a7ca | 1469 | prev_pos = pos; |
fe0066f5 | 1470 | prev_pos_byte = pos_byte; |
c9c0f7cf | 1471 | wide_column_end_hpos = 0; |
0aa01123 JB |
1472 | |
1473 | /* Consult the width run cache to see if we can avoid inspecting | |
1474 | the text character-by-character. */ | |
1475 | if (current_buffer->width_run_cache && pos >= next_width_run) | |
1476 | { | |
1477 | int run_end; | |
1478 | int common_width | |
1479 | = region_cache_forward (current_buffer, | |
1480 | current_buffer->width_run_cache, | |
1481 | pos, &run_end); | |
1482 | ||
1483 | /* A width of zero means the character's width varies (like | |
1484 | a tab), is meaningless (like a newline), or we just don't | |
1485 | want to skip over it for some other reason. */ | |
1486 | if (common_width != 0) | |
1487 | { | |
1488 | int run_end_hpos; | |
1489 | ||
1490 | /* Don't go past the final buffer posn the user | |
1491 | requested. */ | |
1492 | if (run_end > to) | |
1493 | run_end = to; | |
1494 | ||
1495 | run_end_hpos = hpos + (run_end - pos) * common_width; | |
1496 | ||
1497 | /* Don't go past the final horizontal position the user | |
1498 | requested. */ | |
1499 | if (vpos == tovpos && run_end_hpos > tohpos) | |
1500 | { | |
1501 | run_end = pos + (tohpos - hpos) / common_width; | |
1502 | run_end_hpos = hpos + (run_end - pos) * common_width; | |
1503 | } | |
2ff4775b | 1504 | |
0aa01123 JB |
1505 | /* Don't go past the margin. */ |
1506 | if (run_end_hpos >= width) | |
1507 | { | |
1508 | run_end = pos + (width - hpos) / common_width; | |
1509 | run_end_hpos = hpos + (run_end - pos) * common_width; | |
1510 | } | |
1511 | ||
1512 | hpos = run_end_hpos; | |
1513 | if (run_end > pos) | |
1514 | prev_hpos = hpos - common_width; | |
fe0066f5 RS |
1515 | if (pos != run_end) |
1516 | { | |
1517 | pos = run_end; | |
1518 | pos_byte = CHAR_TO_BYTE (pos); | |
1519 | } | |
0aa01123 JB |
1520 | } |
1521 | ||
1522 | next_width_run = run_end + 1; | |
1523 | } | |
1524 | ||
1525 | /* We have to scan the text character-by-character. */ | |
993b6404 | 1526 | else |
2ab90d49 | 1527 | { |
88c6e37e GM |
1528 | EMACS_INT i, n; |
1529 | Lisp_Object charvec; | |
1530 | ||
fe0066f5 | 1531 | c = FETCH_BYTE (pos_byte); |
012fd715 KH |
1532 | |
1533 | /* Check composition sequence. */ | |
1534 | { | |
1535 | int len, len_byte, width; | |
1536 | ||
1537 | if (check_composition (pos, pos_byte, to, &len, &len_byte, &width)) | |
1538 | { | |
1539 | pos += len; | |
1540 | pos_byte += len_byte; | |
1541 | hpos += width; | |
1542 | continue; | |
1543 | } | |
1544 | } | |
1545 | ||
fe0066f5 | 1546 | pos++, pos_byte++; |
0aa01123 | 1547 | |
2ab90d49 KH |
1548 | /* Perhaps add some info to the width_run_cache. */ |
1549 | if (current_buffer->width_run_cache) | |
1550 | { | |
1551 | /* Is this character part of the current run? If so, extend | |
1552 | the run. */ | |
1553 | if (pos - 1 == width_run_end | |
5db0afb7 | 1554 | && XFASTINT (width_table[c]) == width_run_width) |
2ab90d49 KH |
1555 | width_run_end = pos; |
1556 | ||
1557 | /* The previous run is over, since this is a character at a | |
1558 | different position, or a different width. */ | |
1559 | else | |
1560 | { | |
1561 | /* Have we accumulated a run to put in the cache? | |
1562 | (Currently, we only cache runs of width == 1). */ | |
1563 | if (width_run_start < width_run_end | |
1564 | && width_run_width == 1) | |
1565 | know_region_cache (current_buffer, | |
1566 | current_buffer->width_run_cache, | |
1567 | width_run_start, width_run_end); | |
1568 | ||
1569 | /* Start recording a new width run. */ | |
5db0afb7 | 1570 | width_run_width = XFASTINT (width_table[c]); |
2ab90d49 KH |
1571 | width_run_start = pos - 1; |
1572 | width_run_end = pos; | |
1573 | } | |
1574 | } | |
993b6404 | 1575 | |
c9c0f7cf KH |
1576 | if (dp != 0 |
1577 | && ! (multibyte && BASE_LEADING_CODE_P (c)) | |
1578 | && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
993b6404 | 1579 | { |
88c6e37e GM |
1580 | charvec = DISP_CHAR_VECTOR (dp, c); |
1581 | n = ASIZE (charvec); | |
993b6404 | 1582 | } |
88c6e37e | 1583 | else |
993b6404 | 1584 | { |
88c6e37e GM |
1585 | charvec = Qnil; |
1586 | n = 1; | |
1587 | } | |
1588 | ||
1589 | for (i = n - 1; i >= 0; --i) | |
1590 | { | |
1591 | if (VECTORP (charvec)) | |
2ab90d49 | 1592 | { |
88c6e37e GM |
1593 | /* This should be handled the same as |
1594 | next_element_from_display_vector does it. */ | |
1595 | Lisp_Object entry = AREF (charvec, i); | |
1596 | ||
1597 | if (INTEGERP (entry) | |
1598 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
1599 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
1600 | else | |
1601 | c = ' '; | |
1602 | } | |
1603 | ||
1604 | if (c >= 040 && c < 0177) | |
1605 | hpos++; | |
1606 | else if (c == '\t') | |
1607 | { | |
1608 | int tem = ((hpos + tab_offset + hscroll - (hscroll > 0)) | |
1609 | % tab_width); | |
1610 | if (tem < 0) | |
1611 | tem += tab_width; | |
1612 | hpos += tab_width - tem; | |
1613 | } | |
1614 | else if (c == '\n') | |
1615 | { | |
1616 | if (selective > 0 | |
1617 | && indented_beyond_p (pos, pos_byte, selective)) | |
2ab90d49 | 1618 | { |
88c6e37e GM |
1619 | /* If (pos == to), we don't have to take care of |
1620 | selective display. */ | |
1621 | if (pos < to) | |
fe0066f5 | 1622 | { |
88c6e37e GM |
1623 | /* Skip any number of invisible lines all at once */ |
1624 | do | |
1625 | { | |
1626 | pos = find_before_next_newline (pos, to, 1); | |
1627 | if (pos < to) | |
1628 | pos++; | |
1629 | pos_byte = CHAR_TO_BYTE (pos); | |
1630 | } | |
1631 | while (pos < to | |
1632 | && indented_beyond_p (pos, pos_byte, selective)); | |
1633 | /* Allow for the " ..." that is displayed for them. */ | |
1634 | if (selective_rlen) | |
1635 | { | |
1636 | hpos += selective_rlen; | |
1637 | if (hpos >= width) | |
1638 | hpos = width; | |
1639 | } | |
1640 | DEC_BOTH (pos, pos_byte); | |
1641 | /* We have skipped the invis text, but not the | |
1642 | newline after. */ | |
fe0066f5 | 1643 | } |
2ab90d49 | 1644 | } |
88c6e37e GM |
1645 | else |
1646 | { | |
1647 | /* A visible line. */ | |
1648 | vpos++; | |
1649 | hpos = 0; | |
1650 | hpos -= hscroll; | |
1651 | /* Count the truncation glyph on column 0 */ | |
1652 | if (hscroll > 0) | |
1653 | hpos++; | |
1654 | tab_offset = 0; | |
1655 | } | |
1656 | contin_hpos = 0; | |
2ab90d49 | 1657 | } |
88c6e37e | 1658 | else if (c == CR && selective < 0) |
fe0066f5 | 1659 | { |
88c6e37e GM |
1660 | /* In selective display mode, |
1661 | everything from a ^M to the end of the line is invisible. | |
1662 | Stop *before* the real newline. */ | |
1663 | if (pos < to) | |
1664 | { | |
1665 | pos = find_before_next_newline (pos, to, 1); | |
1666 | pos_byte = CHAR_TO_BYTE (pos); | |
1667 | } | |
1668 | /* If we just skipped next_boundary, | |
1669 | loop around in the main while | |
1670 | and handle it. */ | |
1671 | if (pos > next_boundary) | |
1672 | next_boundary = pos; | |
1673 | /* Allow for the " ..." that is displayed for them. */ | |
1674 | if (selective_rlen) | |
1675 | { | |
1676 | hpos += selective_rlen; | |
1677 | if (hpos >= width) | |
1678 | hpos = width; | |
1679 | } | |
fe0066f5 | 1680 | } |
88c6e37e | 1681 | else if (multibyte && BASE_LEADING_CODE_P (c)) |
2ab90d49 | 1682 | { |
88c6e37e GM |
1683 | /* Start of multi-byte form. */ |
1684 | unsigned char *ptr; | |
1685 | int bytes, width, wide_column; | |
1686 | ||
1687 | pos_byte--; /* rewind POS_BYTE */ | |
1688 | ptr = BYTE_POS_ADDR (pos_byte); | |
1689 | MULTIBYTE_BYTES_WIDTH (ptr, dp); | |
1690 | pos_byte += bytes; | |
1691 | if (wide_column) | |
1692 | wide_column_end_hpos = hpos + wide_column; | |
1693 | hpos += width; | |
2ab90d49 | 1694 | } |
f1004faf GM |
1695 | else if (VECTORP (charvec)) |
1696 | ++hpos; | |
88c6e37e GM |
1697 | else |
1698 | hpos += (ctl_arrow && c < 0200) ? 2 : 4; | |
2ab90d49 | 1699 | } |
993b6404 JB |
1700 | } |
1701 | } | |
1702 | ||
98136db3 RS |
1703 | after_loop: |
1704 | ||
0aa01123 JB |
1705 | /* Remember any final width run in the cache. */ |
1706 | if (current_buffer->width_run_cache | |
1707 | && width_run_width == 1 | |
1708 | && width_run_start < width_run_end) | |
1709 | know_region_cache (current_buffer, current_buffer->width_run_cache, | |
1710 | width_run_start, width_run_end); | |
1711 | ||
993b6404 | 1712 | val_compute_motion.bufpos = pos; |
fe0066f5 | 1713 | val_compute_motion.bytepos = pos_byte; |
cde9337b JB |
1714 | val_compute_motion.hpos = hpos; |
1715 | val_compute_motion.vpos = vpos; | |
ef3af330 AS |
1716 | if (contin_hpos && prev_hpos == 0) |
1717 | val_compute_motion.prevhpos = contin_hpos; | |
1718 | else | |
1719 | val_compute_motion.prevhpos = prev_hpos; | |
927b5a55 RS |
1720 | /* We alalways handle all of them here; none of them remain to do. */ |
1721 | val_compute_motion.ovstring_chars_done = 0; | |
993b6404 JB |
1722 | |
1723 | /* Nonzero if have just continued a line */ | |
a997a7ca | 1724 | val_compute_motion.contin = (contin_hpos && prev_hpos == 0); |
993b6404 | 1725 | |
e4500116 | 1726 | immediate_quit = 0; |
993b6404 JB |
1727 | return &val_compute_motion; |
1728 | } | |
993b6404 | 1729 | |
8720a429 | 1730 | |
88af3af4 | 1731 | DEFUN ("compute-motion", Fcompute_motion, Scompute_motion, 7, 7, 0, |
8c1a1077 PJ |
1732 | doc: /* Scan through the current buffer, calculating screen position. |
1733 | Scan the current buffer forward from offset FROM, | |
1734 | assuming it is at position FROMPOS--a cons of the form (HPOS . VPOS)-- | |
1735 | to position TO or position TOPOS--another cons of the form (HPOS . VPOS)-- | |
1736 | and return the ending buffer position and screen location. | |
1737 | ||
1738 | There are three additional arguments: | |
1739 | ||
1740 | WIDTH is the number of columns available to display text; | |
1741 | this affects handling of continuation lines. | |
1742 | This is usually the value returned by `window-width', less one (to allow | |
1743 | for the continuation glyph). | |
1744 | ||
1745 | OFFSETS is either nil or a cons cell (HSCROLL . TAB-OFFSET). | |
1746 | HSCROLL is the number of columns not being displayed at the left | |
1747 | margin; this is usually taken from a window's hscroll member. | |
1748 | TAB-OFFSET is the number of columns of the first tab that aren't | |
1749 | being displayed, perhaps because the line was continued within it. | |
1750 | If OFFSETS is nil, HSCROLL and TAB-OFFSET are assumed to be zero. | |
1751 | ||
1752 | WINDOW is the window to operate on. It is used to choose the display table; | |
1753 | if it is showing the current buffer, it is used also for | |
1754 | deciding which overlay properties apply. | |
1755 | Note that `compute-motion' always operates on the current buffer. | |
1756 | ||
1757 | The value is a list of five elements: | |
1758 | (POS HPOS VPOS PREVHPOS CONTIN) | |
1759 | POS is the buffer position where the scan stopped. | |
1760 | VPOS is the vertical position where the scan stopped. | |
1761 | HPOS is the horizontal position where the scan stopped. | |
1762 | ||
1763 | PREVHPOS is the horizontal position one character back from POS. | |
1764 | CONTIN is t if a line was continued after (or within) the previous character. | |
1765 | ||
1766 | For example, to find the buffer position of column COL of line LINE | |
1767 | of a certain window, pass the window's starting location as FROM | |
1768 | and the window's upper-left coordinates as FROMPOS. | |
1769 | Pass the buffer's (point-max) as TO, to limit the scan to the end of the | |
1770 | visible section of the buffer, and pass LINE and COL as TOPOS. */) | |
1771 | (from, frompos, to, topos, width, offsets, window) | |
42918ba5 | 1772 | Lisp_Object from, frompos, to, topos; |
88af3af4 | 1773 | Lisp_Object width, offsets, window; |
42918ba5 | 1774 | { |
8798a92b | 1775 | Lisp_Object bufpos, hpos, vpos, prevhpos; |
42918ba5 RS |
1776 | struct position *pos; |
1777 | int hscroll, tab_offset; | |
1778 | ||
b7826503 PJ |
1779 | CHECK_NUMBER_COERCE_MARKER (from); |
1780 | CHECK_CONS (frompos); | |
1781 | CHECK_NUMBER_CAR (frompos); | |
1782 | CHECK_NUMBER_CDR (frompos); | |
1783 | CHECK_NUMBER_COERCE_MARKER (to); | |
1784 | CHECK_CONS (topos); | |
1785 | CHECK_NUMBER_CAR (topos); | |
1786 | CHECK_NUMBER_CDR (topos); | |
1787 | CHECK_NUMBER (width); | |
42918ba5 RS |
1788 | if (!NILP (offsets)) |
1789 | { | |
b7826503 PJ |
1790 | CHECK_CONS (offsets); |
1791 | CHECK_NUMBER_CAR (offsets); | |
1792 | CHECK_NUMBER_CDR (offsets); | |
70949dac KR |
1793 | hscroll = XINT (XCAR (offsets)); |
1794 | tab_offset = XINT (XCDR (offsets)); | |
42918ba5 RS |
1795 | } |
1796 | else | |
1797 | hscroll = tab_offset = 0; | |
1798 | ||
88af3af4 KH |
1799 | if (NILP (window)) |
1800 | window = Fselected_window (); | |
1801 | else | |
b7826503 | 1802 | CHECK_LIVE_WINDOW (window); |
88af3af4 | 1803 | |
9fdae274 KH |
1804 | if (XINT (from) < BEGV || XINT (from) > ZV) |
1805 | args_out_of_range_3 (from, make_number (BEGV), make_number (ZV)); | |
1806 | if (XINT (to) < BEGV || XINT (to) > ZV) | |
1807 | args_out_of_range_3 (to, make_number (BEGV), make_number (ZV)); | |
1808 | ||
70949dac KR |
1809 | pos = compute_motion (XINT (from), XINT (XCDR (frompos)), |
1810 | XINT (XCAR (frompos)), 0, | |
1811 | XINT (to), XINT (XCDR (topos)), | |
1812 | XINT (XCAR (topos)), | |
88af3af4 KH |
1813 | XINT (width), hscroll, tab_offset, |
1814 | XWINDOW (window)); | |
42918ba5 | 1815 | |
94d92e9c | 1816 | XSETFASTINT (bufpos, pos->bufpos); |
f8f645a1 KH |
1817 | XSETINT (hpos, pos->hpos); |
1818 | XSETINT (vpos, pos->vpos); | |
1819 | XSETINT (prevhpos, pos->prevhpos); | |
42918ba5 RS |
1820 | |
1821 | return Fcons (bufpos, | |
1822 | Fcons (hpos, | |
1823 | Fcons (vpos, | |
1824 | Fcons (prevhpos, | |
1825 | Fcons (pos->contin ? Qt : Qnil, Qnil))))); | |
1826 | ||
1827 | } | |
993b6404 | 1828 | \f |
0aa01123 | 1829 | /* Fvertical_motion and vmotion */ |
88c6e37e | 1830 | |
993b6404 JB |
1831 | struct position val_vmotion; |
1832 | ||
1833 | struct position * | |
99ce22d5 KH |
1834 | vmotion (from, vtarget, w) |
1835 | register int from, vtarget; | |
1836 | struct window *w; | |
993b6404 | 1837 | { |
99ce22d5 KH |
1838 | int width = window_internal_width (w) - 1; |
1839 | int hscroll = XINT (w->hscroll); | |
993b6404 JB |
1840 | struct position pos; |
1841 | /* vpos is cumulative vertical position, changed as from is changed */ | |
1842 | register int vpos = 0; | |
92992c7e | 1843 | Lisp_Object prevline; |
993b6404 | 1844 | register int first; |
fe0066f5 | 1845 | int from_byte; |
993b6404 JB |
1846 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; |
1847 | int selective | |
eeaafd4f KH |
1848 | = (INTEGERP (current_buffer->selective_display) |
1849 | ? XINT (current_buffer->selective_display) | |
1850 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
99ce22d5 KH |
1851 | Lisp_Object window; |
1852 | int start_hpos = 0; | |
2ab90d49 | 1853 | int did_motion; |
7ac57cb3 RS |
1854 | /* This is the object we use for fetching character properties. */ |
1855 | Lisp_Object text_prop_object; | |
99ce22d5 KH |
1856 | |
1857 | XSETWINDOW (window, w); | |
1858 | ||
7ac57cb3 RS |
1859 | /* If the window contains this buffer, use it for getting text properties. |
1860 | Otherwise use the current buffer as arg for doing that. */ | |
1861 | if (EQ (w->buffer, Fcurrent_buffer ())) | |
1862 | text_prop_object = window; | |
1863 | else | |
1864 | text_prop_object = Fcurrent_buffer (); | |
1865 | ||
99ce22d5 | 1866 | if (vpos >= vtarget) |
993b6404 | 1867 | { |
99ce22d5 | 1868 | /* To move upward, go a line at a time until |
fe0066f5 | 1869 | we have gone at least far enough. */ |
99ce22d5 KH |
1870 | |
1871 | first = 1; | |
1872 | ||
1873 | while ((vpos > vtarget || first) && from > BEGV) | |
993b6404 | 1874 | { |
66c75ca5 RS |
1875 | Lisp_Object propval; |
1876 | ||
99ce22d5 | 1877 | XSETFASTINT (prevline, find_next_newline_no_quit (from - 1, -1)); |
92992c7e | 1878 | while (XFASTINT (prevline) > BEGV |
5a05d3d2 | 1879 | && ((selective > 0 |
fe0066f5 RS |
1880 | && indented_beyond_p (XFASTINT (prevline), |
1881 | CHAR_TO_BYTE (XFASTINT (prevline)), | |
1882 | selective)) | |
5a05d3d2 | 1883 | /* watch out for newlines with `invisible' property */ |
66c75ca5 RS |
1884 | || (propval = Fget_char_property (prevline, |
1885 | Qinvisible, | |
7ac57cb3 | 1886 | text_prop_object), |
339ee979 | 1887 | TEXT_PROP_MEANS_INVISIBLE (propval)))) |
94d92e9c KH |
1888 | XSETFASTINT (prevline, |
1889 | find_next_newline_no_quit (XFASTINT (prevline) - 1, | |
1890 | -1)); | |
92992c7e | 1891 | pos = *compute_motion (XFASTINT (prevline), 0, |
99ce22d5 | 1892 | lmargin + (XFASTINT (prevline) == BEG |
92992c7e | 1893 | ? start_hpos : 0), |
2ab90d49 | 1894 | 0, |
a997a7ca KH |
1895 | from, |
1896 | /* Don't care for VPOS... */ | |
1897 | 1 << (BITS_PER_SHORT - 1), | |
1898 | /* ... nor HPOS. */ | |
1899 | 1 << (BITS_PER_SHORT - 1), | |
2dd4e608 RS |
1900 | width, hscroll, |
1901 | /* This compensates for start_hpos | |
1902 | so that a tab as first character | |
1903 | still occupies 8 columns. */ | |
1904 | (XFASTINT (prevline) == BEG | |
1905 | ? -start_hpos : 0), | |
1906 | w); | |
99ce22d5 KH |
1907 | vpos -= pos.vpos; |
1908 | first = 0; | |
1909 | from = XFASTINT (prevline); | |
993b6404 | 1910 | } |
99ce22d5 KH |
1911 | |
1912 | /* If we made exactly the desired vertical distance, | |
1913 | or if we hit beginning of buffer, | |
1914 | return point found */ | |
1915 | if (vpos >= vtarget) | |
993b6404 | 1916 | { |
99ce22d5 | 1917 | val_vmotion.bufpos = from; |
fe0066f5 | 1918 | val_vmotion.bytepos = CHAR_TO_BYTE (from); |
99ce22d5 KH |
1919 | val_vmotion.vpos = vpos; |
1920 | val_vmotion.hpos = lmargin; | |
1921 | val_vmotion.contin = 0; | |
1922 | val_vmotion.prevhpos = 0; | |
927b5a55 | 1923 | val_vmotion.ovstring_chars_done = 0; |
a997a7ca | 1924 | val_vmotion.tab_offset = 0; /* For accumulating tab offset. */ |
99ce22d5 | 1925 | return &val_vmotion; |
993b6404 | 1926 | } |
993b6404 | 1927 | |
99ce22d5 KH |
1928 | /* Otherwise find the correct spot by moving down */ |
1929 | } | |
1930 | /* Moving downward is simple, but must calculate from beg of line | |
1931 | to determine hpos of starting point */ | |
fe0066f5 RS |
1932 | from_byte = CHAR_TO_BYTE (from); |
1933 | if (from > BEGV && FETCH_BYTE (from_byte - 1) != '\n') | |
993b6404 | 1934 | { |
2ab90d49 | 1935 | Lisp_Object propval; |
66c75ca5 | 1936 | |
99ce22d5 KH |
1937 | XSETFASTINT (prevline, find_next_newline_no_quit (from, -1)); |
1938 | while (XFASTINT (prevline) > BEGV | |
1939 | && ((selective > 0 | |
fe0066f5 RS |
1940 | && indented_beyond_p (XFASTINT (prevline), |
1941 | CHAR_TO_BYTE (XFASTINT (prevline)), | |
1942 | selective)) | |
99ce22d5 KH |
1943 | /* watch out for newlines with `invisible' property */ |
1944 | || (propval = Fget_char_property (prevline, Qinvisible, | |
7ac57cb3 | 1945 | text_prop_object), |
339ee979 | 1946 | TEXT_PROP_MEANS_INVISIBLE (propval)))) |
99ce22d5 KH |
1947 | XSETFASTINT (prevline, |
1948 | find_next_newline_no_quit (XFASTINT (prevline) - 1, | |
1949 | -1)); | |
92992c7e | 1950 | pos = *compute_motion (XFASTINT (prevline), 0, |
99ce22d5 | 1951 | lmargin + (XFASTINT (prevline) == BEG |
92992c7e | 1952 | ? start_hpos : 0), |
2ab90d49 | 1953 | 0, |
a997a7ca KH |
1954 | from, |
1955 | /* Don't care for VPOS... */ | |
1956 | 1 << (BITS_PER_SHORT - 1), | |
1957 | /* ... nor HPOS. */ | |
1958 | 1 << (BITS_PER_SHORT - 1), | |
2dd4e608 RS |
1959 | width, hscroll, |
1960 | (XFASTINT (prevline) == BEG ? -start_hpos : 0), | |
1961 | w); | |
2ab90d49 | 1962 | did_motion = 1; |
993b6404 | 1963 | } |
99ce22d5 | 1964 | else |
993b6404 | 1965 | { |
99ce22d5 KH |
1966 | pos.hpos = lmargin + (from == BEG ? start_hpos : 0); |
1967 | pos.vpos = 0; | |
a997a7ca | 1968 | pos.tab_offset = 0; |
2ab90d49 | 1969 | did_motion = 0; |
993b6404 | 1970 | } |
2ab90d49 | 1971 | return compute_motion (from, vpos, pos.hpos, did_motion, |
a997a7ca | 1972 | ZV, vtarget, - (1 << (BITS_PER_SHORT - 1)), |
2dd4e608 | 1973 | width, hscroll, |
a997a7ca | 1974 | pos.tab_offset - (from == BEG ? start_hpos : 0), |
2dd4e608 | 1975 | w); |
993b6404 JB |
1976 | } |
1977 | ||
f1ecfe9b | 1978 | DEFUN ("vertical-motion", Fvertical_motion, Svertical_motion, 1, 2, 0, |
8c1a1077 PJ |
1979 | doc: /* Move point to start of the screen line LINES lines down. |
1980 | If LINES is negative, this means moving up. | |
1981 | ||
1982 | This function is an ordinary cursor motion function | |
1983 | which calculates the new position based on how text would be displayed. | |
1984 | The new position may be the start of a line, | |
1985 | or just the start of a continuation line. | |
1986 | The function returns number of screen lines moved over; | |
1987 | that usually equals LINES, but may be closer to zero | |
1988 | if beginning or end of buffer was reached. | |
1989 | ||
1990 | The optional second argument WINDOW specifies the window to use for | |
1991 | parameters such as width, horizontal scrolling, and so on. | |
1992 | The default is to use the selected window's parameters. | |
1993 | ||
1994 | `vertical-motion' always uses the current buffer, | |
1995 | regardless of which buffer is displayed in WINDOW. | |
1996 | This is consistent with other cursor motion functions | |
1997 | and makes it possible to use `vertical-motion' in any buffer, | |
1998 | whether or not it is currently displayed in some window. */) | |
1999 | (lines, window) | |
f1ecfe9b | 2000 | Lisp_Object lines, window; |
993b6404 | 2001 | { |
8720a429 GM |
2002 | struct it it; |
2003 | struct text_pos pt; | |
8720a429 | 2004 | struct window *w; |
39210e90 GM |
2005 | Lisp_Object old_buffer; |
2006 | struct gcpro gcpro1; | |
993b6404 | 2007 | |
b7826503 | 2008 | CHECK_NUMBER (lines); |
f1ecfe9b | 2009 | if (! NILP (window)) |
b7826503 | 2010 | CHECK_WINDOW (window); |
f1ecfe9b | 2011 | else |
92992c7e | 2012 | window = selected_window; |
8720a429 | 2013 | w = XWINDOW (window); |
39210e90 GM |
2014 | |
2015 | old_buffer = Qnil; | |
2016 | GCPRO1 (old_buffer); | |
2017 | if (XBUFFER (w->buffer) != current_buffer) | |
8720a429 | 2018 | { |
39210e90 GM |
2019 | /* Set the window's buffer temporarily to the current buffer. */ |
2020 | old_buffer = w->buffer; | |
2021 | XSETBUFFER (w->buffer, current_buffer); | |
8720a429 | 2022 | } |
8720a429 GM |
2023 | |
2024 | SET_TEXT_POS (pt, PT, PT_BYTE); | |
2025 | start_display (&it, w, pt); | |
2026 | move_it_by_lines (&it, XINT (lines), 0); | |
2027 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); | |
2028 | ||
39210e90 GM |
2029 | if (BUFFERP (old_buffer)) |
2030 | w->buffer = old_buffer; | |
8720a429 | 2031 | |
39210e90 | 2032 | RETURN_UNGCPRO (make_number (it.vpos)); |
993b6404 | 2033 | } |
8720a429 GM |
2034 | |
2035 | ||
993b6404 | 2036 | \f |
88c6e37e | 2037 | /* File's initialization. */ |
0aa01123 | 2038 | |
dfcf069d | 2039 | void |
993b6404 JB |
2040 | syms_of_indent () |
2041 | { | |
2042 | DEFVAR_BOOL ("indent-tabs-mode", &indent_tabs_mode, | |
8c1a1077 PJ |
2043 | doc: /* *Indentation can insert tabs if this is non-nil. |
2044 | Setting this variable automatically makes it local to the current buffer. */); | |
993b6404 JB |
2045 | indent_tabs_mode = 1; |
2046 | ||
2047 | defsubr (&Scurrent_indentation); | |
2048 | defsubr (&Sindent_to); | |
2049 | defsubr (&Scurrent_column); | |
2050 | defsubr (&Smove_to_column); | |
2051 | defsubr (&Svertical_motion); | |
42918ba5 | 2052 | defsubr (&Scompute_motion); |
993b6404 | 2053 | } |