Commit | Line | Data |
---|---|---|
993b6404 | 1 | /* Indentation functions. |
3a46a5de | 2 | Copyright (C) 1985,86,87,88,93,94,95,98, 2000, 2001, 2002 |
88c6e37e | 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 | |
76e20cb0 | 50 | double 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 | ||
76e20cb0 RS |
60 | static double current_column_1 P_ ((void)); |
61 | static double 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; |
662152dd | 224 | int end, inv_p; |
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 */ | |
662152dd SM |
269 | prop = Fget_char_property (position, Qinvisible, |
270 | (!NILP (window) | |
271 | && EQ (XWINDOW (window)->buffer, buffer)) | |
272 | ? window : buffer); | |
273 | inv_p = TEXT_PROP_MEANS_INVISIBLE (prop); | |
274 | /* When counting columns (window == nil), don't skip over ellipsis text. */ | |
275 | if (NILP (window) ? inv_p == 1 : inv_p) | |
9a21bb64 RS |
276 | return *next_boundary_p; |
277 | return pos; | |
278 | } | |
279 | \f | |
012fd715 | 280 | /* If a composition starts at POS/POS_BYTE and it doesn't stride over |
703af3d5 | 281 | POINT, set *LEN / *LEN_BYTE to the character and byte lengths, *WIDTH |
012fd715 KH |
282 | to the width, and return 1. Otherwise, return 0. */ |
283 | ||
284 | static int | |
285 | check_composition (pos, pos_byte, point, len, len_byte, width) | |
286 | int pos, pos_byte, point; | |
287 | int *len, *len_byte, *width; | |
288 | { | |
289 | Lisp_Object prop; | |
290 | int start, end; | |
291 | int id; | |
292 | ||
293 | if (! find_composition (pos, -1, &start, &end, &prop, Qnil) | |
9ee6df62 KH |
294 | || pos != start || point < end |
295 | || !COMPOSITION_VALID_P (start, end, prop)) | |
012fd715 KH |
296 | return 0; |
297 | if ((id = get_composition_id (pos, pos_byte, end - pos, prop, Qnil)) < 0) | |
298 | return 0; | |
299 | ||
300 | *len = COMPOSITION_LENGTH (prop); | |
301 | *len_byte = CHAR_TO_BYTE (end) - pos_byte; | |
302 | *width = composition_table[id]->width; | |
303 | return 1; | |
304 | } | |
305 | \f | |
c9c0f7cf KH |
306 | /* Set variables WIDTH and BYTES for a multibyte sequence starting at P. |
307 | ||
c9c0f7cf KH |
308 | DP is a display table or NULL. |
309 | ||
310 | This macro is used in current_column_1, Fmove_to_column, and | |
311 | compute_motion. */ | |
312 | ||
012fd715 KH |
313 | #define MULTIBYTE_BYTES_WIDTH(p, dp) \ |
314 | do { \ | |
315 | int c; \ | |
316 | \ | |
317 | wide_column = 0; \ | |
318 | c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, bytes); \ | |
319 | if (BYTES_BY_CHAR_HEAD (*p) != bytes) \ | |
320 | width = bytes * 4; \ | |
321 | else \ | |
322 | { \ | |
323 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) \ | |
324 | width = XVECTOR (DISP_CHAR_VECTOR (dp, c))->size; \ | |
325 | else \ | |
326 | width = WIDTH_BY_CHAR_HEAD (*p); \ | |
327 | if (width > 1) \ | |
328 | wide_column = width; \ | |
329 | } \ | |
c9c0f7cf KH |
330 | } while (0) |
331 | ||
097812fb | 332 | |
993b6404 | 333 | DEFUN ("current-column", Fcurrent_column, Scurrent_column, 0, 0, 0, |
8c1a1077 PJ |
334 | doc: /* Return the horizontal position of point. Beginning of line is column 0. |
335 | This is calculated by adding together the widths of all the displayed | |
336 | representations of the character between the start of the previous line | |
337 | and point. (eg control characters will have a width of 2 or 4, tabs | |
338 | will have a variable width) | |
339 | Ignores finite width of frame, which means that this function may return | |
340 | values greater than (frame-width). | |
341 | Whether the line is visible (if `selective-display' is t) has no effect; | |
342 | however, ^M is treated as end of line when `selective-display' is t. */) | |
343 | () | |
993b6404 JB |
344 | { |
345 | Lisp_Object temp; | |
097812fb | 346 | XSETFASTINT (temp, (int) current_column ()); /* iftc */ |
993b6404 JB |
347 | return temp; |
348 | } | |
349 | ||
e74928fc JB |
350 | /* Cancel any recorded value of the horizontal position. */ |
351 | ||
c9667ae1 | 352 | void |
e74928fc JB |
353 | invalidate_current_column () |
354 | { | |
355 | last_known_column_point = 0; | |
356 | } | |
357 | ||
76e20cb0 | 358 | double |
993b6404 JB |
359 | current_column () |
360 | { | |
361 | register int col; | |
362 | register unsigned char *ptr, *stop; | |
363 | register int tab_seen; | |
364 | int post_tab; | |
365 | register int c; | |
366 | register int tab_width = XINT (current_buffer->tab_width); | |
56a98455 | 367 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
d44f12b4 | 368 | register struct Lisp_Char_Table *dp = buffer_display_table (); |
993b6404 | 369 | |
6ec8bbd2 | 370 | if (PT == last_known_column_point |
993b6404 JB |
371 | && MODIFF == last_known_column_modified) |
372 | return last_known_column; | |
373 | ||
813b81b3 RS |
374 | /* If the buffer has overlays, text properties, |
375 | or multibyte characters, use a more general algorithm. */ | |
9a21bb64 RS |
376 | if (BUF_INTERVALS (current_buffer) |
377 | || !NILP (current_buffer->overlays_before) | |
a997a7ca | 378 | || !NILP (current_buffer->overlays_after) |
813b81b3 RS |
379 | || Z != Z_BYTE) |
380 | return current_column_1 (); | |
9a21bb64 RS |
381 | |
382 | /* Scan backwards from point to the previous newline, | |
383 | counting width. Tab characters are the only complicated case. */ | |
384 | ||
993b6404 | 385 | /* Make a pointer for decrementing through the chars before point. */ |
fe0066f5 | 386 | ptr = BYTE_POS_ADDR (PT_BYTE - 1) + 1; |
993b6404 JB |
387 | /* Make a pointer to where consecutive chars leave off, |
388 | going backwards from point. */ | |
6ec8bbd2 | 389 | if (PT == BEGV) |
993b6404 | 390 | stop = ptr; |
6ec8bbd2 | 391 | else if (PT <= GPT || BEGV > GPT) |
993b6404 JB |
392 | stop = BEGV_ADDR; |
393 | else | |
394 | stop = GAP_END_ADDR; | |
395 | ||
88c6e37e GM |
396 | if (tab_width <= 0 || tab_width > 1000) |
397 | tab_width = 8; | |
993b6404 JB |
398 | |
399 | col = 0, tab_seen = 0, post_tab = 0; | |
400 | ||
401 | while (1) | |
402 | { | |
88c6e37e GM |
403 | EMACS_INT i, n; |
404 | Lisp_Object charvec; | |
097812fb | 405 | |
993b6404 JB |
406 | if (ptr == stop) |
407 | { | |
408 | /* We stopped either for the beginning of the buffer | |
409 | or for the gap. */ | |
410 | if (ptr == BEGV_ADDR) | |
411 | break; | |
097812fb | 412 | |
993b6404 JB |
413 | /* It was the gap. Jump back over it. */ |
414 | stop = BEGV_ADDR; | |
415 | ptr = GPT_ADDR; | |
097812fb | 416 | |
993b6404 | 417 | /* Check whether that brings us to beginning of buffer. */ |
88c6e37e GM |
418 | if (BEGV >= GPT) |
419 | break; | |
993b6404 JB |
420 | } |
421 | ||
422 | c = *--ptr; | |
097812fb | 423 | |
88c6e37e | 424 | if (dp && VECTORP (DISP_CHAR_VECTOR (dp, c))) |
7050d530 | 425 | { |
88c6e37e GM |
426 | charvec = DISP_CHAR_VECTOR (dp, c); |
427 | n = ASIZE (charvec); | |
7050d530 | 428 | } |
88c6e37e | 429 | else |
993b6404 | 430 | { |
88c6e37e GM |
431 | charvec = Qnil; |
432 | n = 1; | |
433 | } | |
097812fb | 434 | |
88c6e37e GM |
435 | for (i = n - 1; i >= 0; --i) |
436 | { | |
437 | if (VECTORP (charvec)) | |
438 | { | |
439 | /* This should be handled the same as | |
440 | next_element_from_display_vector does it. */ | |
441 | Lisp_Object entry = AREF (charvec, i); | |
097812fb | 442 | |
88c6e37e GM |
443 | if (INTEGERP (entry) |
444 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
445 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
446 | else | |
447 | c = ' '; | |
448 | } | |
097812fb | 449 | |
88c6e37e GM |
450 | if (c >= 040 && c < 0177) |
451 | col++; | |
452 | else if (c == '\n' | |
453 | || (c == '\r' | |
454 | && EQ (current_buffer->selective_display, Qt))) | |
455 | { | |
456 | ptr++; | |
457 | goto start_of_line_found; | |
458 | } | |
459 | else if (c == '\t') | |
460 | { | |
461 | if (tab_seen) | |
462 | col = ((col + tab_width) / tab_width) * tab_width; | |
097812fb | 463 | |
88c6e37e GM |
464 | post_tab += col; |
465 | col = 0; | |
466 | tab_seen = 1; | |
467 | } | |
f1004faf GM |
468 | else if (VECTORP (charvec)) |
469 | /* With a display table entry, C is displayed as is, and | |
470 | not displayed as \NNN or as ^N. If C is a single-byte | |
471 | character, it takes one column. If C is multi-byte in | |
472 | an unibyte buffer, it's translated to unibyte, so it | |
473 | also takes one column. */ | |
474 | ++col; | |
88c6e37e GM |
475 | else |
476 | col += (ctl_arrow && c < 0200) ? 2 : 4; | |
993b6404 | 477 | } |
993b6404 JB |
478 | } |
479 | ||
88c6e37e GM |
480 | start_of_line_found: |
481 | ||
993b6404 JB |
482 | if (tab_seen) |
483 | { | |
484 | col = ((col + tab_width) / tab_width) * tab_width; | |
485 | col += post_tab; | |
486 | } | |
487 | ||
a997a7ca KH |
488 | if (ptr == BEGV_ADDR) |
489 | current_column_bol_cache = BEGV; | |
490 | else | |
fe0066f5 RS |
491 | current_column_bol_cache = BYTE_TO_CHAR (PTR_BYTE_POS (ptr)); |
492 | ||
993b6404 | 493 | last_known_column = col; |
6ec8bbd2 | 494 | last_known_column_point = PT; |
993b6404 JB |
495 | last_known_column_modified = MODIFF; |
496 | ||
497 | return col; | |
498 | } | |
499 | \f | |
9a21bb64 RS |
500 | /* Return the column number of position POS |
501 | by scanning forward from the beginning of the line. | |
502 | This function handles characters that are invisible | |
503 | due to text properties or overlays. */ | |
504 | ||
76e20cb0 | 505 | static double |
813b81b3 | 506 | current_column_1 () |
9a21bb64 RS |
507 | { |
508 | register int tab_width = XINT (current_buffer->tab_width); | |
509 | register int ctl_arrow = !NILP (current_buffer->ctl_arrow); | |
510 | register struct Lisp_Char_Table *dp = buffer_display_table (); | |
fe0066f5 | 511 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
9a21bb64 RS |
512 | |
513 | /* Start the scan at the beginning of this line with column number 0. */ | |
514 | register int col = 0; | |
fe0066f5 | 515 | int scan, scan_byte; |
58b1103e | 516 | int next_boundary; |
fe0066f5 RS |
517 | int opoint = PT, opoint_byte = PT_BYTE; |
518 | ||
813b81b3 | 519 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -1, 1); |
fe0066f5 RS |
520 | current_column_bol_cache = PT; |
521 | scan = PT, scan_byte = PT_BYTE; | |
522 | SET_PT_BOTH (opoint, opoint_byte); | |
523 | next_boundary = scan; | |
9a21bb64 RS |
524 | |
525 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; | |
526 | ||
527 | /* Scan forward to the target position. */ | |
813b81b3 | 528 | while (scan < opoint) |
9a21bb64 RS |
529 | { |
530 | int c; | |
531 | ||
532 | /* Occasionally we may need to skip invisible text. */ | |
533 | while (scan == next_boundary) | |
534 | { | |
fe0066f5 | 535 | int old_scan = scan; |
9a21bb64 RS |
536 | /* This updates NEXT_BOUNDARY to the next place |
537 | where we might need to skip more invisible text. */ | |
813b81b3 RS |
538 | scan = skip_invisible (scan, &next_boundary, opoint, Qnil); |
539 | if (scan >= opoint) | |
9a21bb64 | 540 | goto endloop; |
fe0066f5 RS |
541 | if (scan != old_scan) |
542 | scan_byte = CHAR_TO_BYTE (scan); | |
9a21bb64 RS |
543 | } |
544 | ||
012fd715 KH |
545 | /* Check composition sequence. */ |
546 | { | |
547 | int len, len_byte, width; | |
548 | ||
549 | if (check_composition (scan, scan_byte, opoint, | |
550 | &len, &len_byte, &width)) | |
551 | { | |
552 | scan += len; | |
553 | scan_byte += len_byte; | |
554 | if (scan <= opoint) | |
555 | col += width; | |
556 | continue; | |
557 | } | |
558 | } | |
559 | ||
813b81b3 | 560 | c = FETCH_BYTE (scan_byte); |
88c6e37e | 561 | |
c9c0f7cf KH |
562 | if (dp != 0 |
563 | && ! (multibyte && BASE_LEADING_CODE_P (c)) | |
564 | && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
9a21bb64 | 565 | { |
d6e483a4 RS |
566 | Lisp_Object charvec; |
567 | EMACS_INT i, n; | |
568 | ||
569 | /* This character is displayed using a vector of glyphs. | |
570 | Update the column based on those glyphs. */ | |
571 | ||
88c6e37e GM |
572 | charvec = DISP_CHAR_VECTOR (dp, c); |
573 | n = ASIZE (charvec); | |
88c6e37e | 574 | |
d6e483a4 | 575 | for (i = 0; i < n; i++) |
88c6e37e GM |
576 | { |
577 | /* This should be handled the same as | |
578 | next_element_from_display_vector does it. */ | |
d6e483a4 RS |
579 | Lisp_Object entry; |
580 | entry = AREF (charvec, i); | |
581 | ||
88c6e37e GM |
582 | if (INTEGERP (entry) |
583 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
584 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
585 | else | |
586 | c = ' '; | |
d6e483a4 RS |
587 | |
588 | if (c == '\n') | |
589 | goto endloop; | |
590 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
591 | goto endloop; | |
592 | if (c == '\t') | |
593 | { | |
d6e483a4 RS |
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 | { | |
88c6e37e GM |
612 | col += tab_width; |
613 | col = col / tab_width * tab_width; | |
614 | } | |
615 | else if (multibyte && BASE_LEADING_CODE_P (c)) | |
616 | { | |
617 | unsigned char *ptr; | |
618 | int bytes, width, wide_column; | |
097812fb | 619 | |
88c6e37e GM |
620 | ptr = BYTE_POS_ADDR (scan_byte); |
621 | MULTIBYTE_BYTES_WIDTH (ptr, dp); | |
622 | scan_byte += bytes; | |
36974b5e RS |
623 | /* Subtract one to compensate for the increment |
624 | that is going to happen below. */ | |
625 | scan_byte--; | |
88c6e37e GM |
626 | col += width; |
627 | } | |
628 | else if (ctl_arrow && (c < 040 || c == 0177)) | |
629 | col += 2; | |
630 | else if (c < 040 || c >= 0177) | |
631 | col += 4; | |
632 | else | |
633 | col++; | |
a997a7ca | 634 | } |
d6e483a4 RS |
635 | scan++; |
636 | scan_byte++; | |
637 | ||
9a21bb64 RS |
638 | } |
639 | endloop: | |
640 | ||
641 | last_known_column = col; | |
6ec8bbd2 | 642 | last_known_column_point = PT; |
9a21bb64 RS |
643 | last_known_column_modified = MODIFF; |
644 | ||
645 | return col; | |
646 | } | |
647 | \f | |
f4a6687d GM |
648 | |
649 | #if 0 /* Not used. */ | |
650 | ||
c412c808 RS |
651 | /* Return the width in columns of the part of STRING from BEG to END. |
652 | If BEG is nil, that stands for the beginning of STRING. | |
653 | If END is nil, that stands for the end of STRING. */ | |
654 | ||
76e20cb0 | 655 | static double |
382ac0bd | 656 | string_display_width (string, beg, end) |
c412c808 RS |
657 | Lisp_Object string, beg, end; |
658 | { | |
659 | register int col; | |
660 | register unsigned char *ptr, *stop; | |
661 | register int tab_seen; | |
662 | int post_tab; | |
663 | register int c; | |
664 | register int tab_width = XINT (current_buffer->tab_width); | |
665 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); | |
d44f12b4 | 666 | register struct Lisp_Char_Table *dp = buffer_display_table (); |
c412c808 RS |
667 | int b, e; |
668 | ||
669 | if (NILP (end)) | |
d5db4077 | 670 | e = SCHARS (string); |
c412c808 RS |
671 | else |
672 | { | |
b7826503 | 673 | CHECK_NUMBER (end); |
c412c808 RS |
674 | e = XINT (end); |
675 | } | |
676 | ||
677 | if (NILP (beg)) | |
678 | b = 0; | |
679 | else | |
680 | { | |
b7826503 | 681 | CHECK_NUMBER (beg); |
c412c808 RS |
682 | b = XINT (beg); |
683 | } | |
684 | ||
685 | /* Make a pointer for decrementing through the chars before point. */ | |
d5db4077 | 686 | ptr = SDATA (string) + e; |
c412c808 RS |
687 | /* Make a pointer to where consecutive chars leave off, |
688 | going backwards from point. */ | |
d5db4077 | 689 | stop = SDATA (string) + b; |
c412c808 RS |
690 | |
691 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; | |
692 | ||
693 | col = 0, tab_seen = 0, post_tab = 0; | |
694 | ||
695 | while (1) | |
696 | { | |
697 | if (ptr == stop) | |
698 | break; | |
699 | ||
700 | c = *--ptr; | |
701 | if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
702 | col += XVECTOR (DISP_CHAR_VECTOR (dp, c))->size; | |
703 | else if (c >= 040 && c < 0177) | |
704 | col++; | |
705 | else if (c == '\n') | |
706 | break; | |
707 | else if (c == '\t') | |
708 | { | |
709 | if (tab_seen) | |
710 | col = ((col + tab_width) / tab_width) * tab_width; | |
711 | ||
712 | post_tab += col; | |
713 | col = 0; | |
714 | tab_seen = 1; | |
715 | } | |
716 | else | |
717 | col += (ctl_arrow && c < 0200) ? 2 : 4; | |
718 | } | |
719 | ||
720 | if (tab_seen) | |
721 | { | |
722 | col = ((col + tab_width) / tab_width) * tab_width; | |
723 | col += post_tab; | |
724 | } | |
725 | ||
726 | return col; | |
727 | } | |
f4a6687d GM |
728 | |
729 | #endif /* 0 */ | |
730 | ||
c412c808 | 731 | \f |
993b6404 | 732 | DEFUN ("indent-to", Findent_to, Sindent_to, 1, 2, "NIndent to column: ", |
8c1a1077 PJ |
733 | doc: /* Indent from point with tabs and spaces until COLUMN is reached. |
734 | Optional second argument MININUM says always do at least MININUM spaces | |
735 | even if that goes past COLUMN; by default, MININUM is zero. */) | |
736 | (column, minimum) | |
04c98432 | 737 | Lisp_Object column, minimum; |
993b6404 JB |
738 | { |
739 | int mincol; | |
740 | register int fromcol; | |
741 | register int tab_width = XINT (current_buffer->tab_width); | |
742 | ||
b7826503 | 743 | CHECK_NUMBER (column); |
56a98455 | 744 | if (NILP (minimum)) |
94d92e9c | 745 | XSETFASTINT (minimum, 0); |
b7826503 | 746 | CHECK_NUMBER (minimum); |
993b6404 JB |
747 | |
748 | fromcol = current_column (); | |
749 | mincol = fromcol + XINT (minimum); | |
04c98432 | 750 | if (mincol < XINT (column)) mincol = XINT (column); |
993b6404 JB |
751 | |
752 | if (fromcol == mincol) | |
753 | return make_number (mincol); | |
754 | ||
ccdcf1f5 | 755 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
993b6404 JB |
756 | |
757 | if (indent_tabs_mode) | |
758 | { | |
759 | Lisp_Object n; | |
94d92e9c | 760 | XSETFASTINT (n, mincol / tab_width - fromcol / tab_width); |
993b6404 JB |
761 | if (XFASTINT (n) != 0) |
762 | { | |
6d1bd1a5 | 763 | Finsert_char (make_number ('\t'), n, Qt); |
993b6404 JB |
764 | |
765 | fromcol = (mincol / tab_width) * tab_width; | |
766 | } | |
767 | } | |
768 | ||
04c98432 EN |
769 | XSETFASTINT (column, mincol - fromcol); |
770 | Finsert_char (make_number (' '), column, Qt); | |
993b6404 JB |
771 | |
772 | last_known_column = mincol; | |
6ec8bbd2 | 773 | last_known_column_point = PT; |
993b6404 JB |
774 | last_known_column_modified = MODIFF; |
775 | ||
04c98432 EN |
776 | XSETINT (column, mincol); |
777 | return column; | |
993b6404 | 778 | } |
0aa01123 | 779 | |
993b6404 | 780 | \f |
76e20cb0 | 781 | static double position_indentation P_ ((int)); |
dfcf069d | 782 | |
993b6404 | 783 | DEFUN ("current-indentation", Fcurrent_indentation, Scurrent_indentation, |
8c1a1077 PJ |
784 | 0, 0, 0, |
785 | doc: /* Return the indentation of the current line. | |
786 | This is the horizontal position of the character | |
787 | following any initial whitespace. */) | |
788 | () | |
993b6404 JB |
789 | { |
790 | Lisp_Object val; | |
fe0066f5 RS |
791 | int opoint = PT, opoint_byte = PT_BYTE; |
792 | ||
793 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -1, 1); | |
993b6404 | 794 | |
097812fb | 795 | XSETFASTINT (val, (int) position_indentation (PT_BYTE)); /* iftc */ |
fe0066f5 | 796 | SET_PT_BOTH (opoint, opoint_byte); |
993b6404 JB |
797 | return val; |
798 | } | |
799 | ||
76e20cb0 | 800 | static double |
fe0066f5 RS |
801 | position_indentation (pos_byte) |
802 | register int pos_byte; | |
993b6404 JB |
803 | { |
804 | register int column = 0; | |
805 | register int tab_width = XINT (current_buffer->tab_width); | |
806 | register unsigned char *p; | |
807 | register unsigned char *stop; | |
9a21bb64 | 808 | unsigned char *start; |
fe0066f5 RS |
809 | int next_boundary_byte = pos_byte; |
810 | int ceiling = next_boundary_byte; | |
2ff4775b | 811 | |
ccdcf1f5 | 812 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
2ff4775b | 813 | |
fe0066f5 | 814 | p = BYTE_POS_ADDR (pos_byte); |
9a21bb64 RS |
815 | /* STOP records the value of P at which we will need |
816 | to think about the gap, or about invisible text, | |
817 | or about the end of the buffer. */ | |
818 | stop = p; | |
819 | /* START records the starting value of P. */ | |
820 | start = p; | |
993b6404 JB |
821 | while (1) |
822 | { | |
823 | while (p == stop) | |
824 | { | |
fe0066f5 | 825 | int stop_pos_byte; |
9a21bb64 | 826 | |
fe0066f5 RS |
827 | /* If we have updated P, set POS_BYTE to match. |
828 | The first time we enter the loop, POS_BYTE is already right. */ | |
9a21bb64 | 829 | if (p != start) |
fe0066f5 | 830 | pos_byte = PTR_BYTE_POS (p); |
9a21bb64 | 831 | /* Consider the various reasons STOP might have been set here. */ |
fe0066f5 | 832 | if (pos_byte == ZV_BYTE) |
993b6404 | 833 | return column; |
fe0066f5 RS |
834 | if (pos_byte == next_boundary_byte) |
835 | { | |
836 | int next_boundary; | |
837 | int pos = BYTE_TO_CHAR (pos_byte); | |
838 | pos = skip_invisible (pos, &next_boundary, ZV, Qnil); | |
839 | pos_byte = CHAR_TO_BYTE (pos); | |
840 | next_boundary_byte = CHAR_TO_BYTE (next_boundary); | |
841 | } | |
842 | if (pos_byte >= ceiling) | |
843 | ceiling = BUFFER_CEILING_OF (pos_byte) + 1; | |
9a21bb64 RS |
844 | /* Compute the next place we need to stop and think, |
845 | and set STOP accordingly. */ | |
fe0066f5 | 846 | stop_pos_byte = min (ceiling, next_boundary_byte); |
9a21bb64 | 847 | /* The -1 and +1 arrange to point at the first byte of gap |
fe0066f5 | 848 | (if STOP_POS_BYTE is the position of the gap) |
9a21bb64 | 849 | rather than at the data after the gap. */ |
097812fb | 850 | |
fe0066f5 RS |
851 | stop = BYTE_POS_ADDR (stop_pos_byte - 1) + 1; |
852 | p = BYTE_POS_ADDR (pos_byte); | |
993b6404 JB |
853 | } |
854 | switch (*p++) | |
855 | { | |
fb911777 KH |
856 | case 0240: |
857 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
858 | return column; | |
993b6404 JB |
859 | case ' ': |
860 | column++; | |
861 | break; | |
862 | case '\t': | |
863 | column += tab_width - column % tab_width; | |
864 | break; | |
865 | default: | |
fb911777 KH |
866 | if (ASCII_BYTE_P (p[-1]) |
867 | || NILP (current_buffer->enable_multibyte_characters)) | |
868 | return column; | |
869 | { | |
fe0066f5 RS |
870 | int c; |
871 | pos_byte = PTR_BYTE_POS (p - 1); | |
872 | c = FETCH_MULTIBYTE_CHAR (pos_byte); | |
fb911777 KH |
873 | if (CHAR_HAS_CATEGORY (c, ' ')) |
874 | { | |
875 | column++; | |
fe0066f5 RS |
876 | INC_POS (pos_byte); |
877 | p = BYTE_POS_ADDR (pos_byte); | |
fb911777 KH |
878 | } |
879 | else | |
880 | return column; | |
881 | } | |
993b6404 JB |
882 | } |
883 | } | |
884 | } | |
1b15e576 KH |
885 | |
886 | /* Test whether the line beginning at POS is indented beyond COLUMN. | |
887 | Blank lines are treated as if they had the same indentation as the | |
888 | preceding line. */ | |
fe0066f5 | 889 | |
1b15e576 | 890 | int |
fe0066f5 | 891 | indented_beyond_p (pos, pos_byte, column) |
097812fb | 892 | int pos, pos_byte; |
76e20cb0 | 893 | double column; |
1b15e576 | 894 | { |
76e20cb0 | 895 | double val; |
fe0066f5 RS |
896 | int opoint = PT, opoint_byte = PT_BYTE; |
897 | ||
898 | SET_PT_BOTH (pos, pos_byte); | |
899 | while (PT > BEGV && FETCH_BYTE (PT_BYTE) == '\n') | |
900 | scan_newline (PT - 1, PT_BYTE - 1, BEGV, BEGV_BYTE, -1, 0); | |
901 | ||
d5d6f706 | 902 | val = position_indentation (PT_BYTE); |
fe0066f5 | 903 | SET_PT_BOTH (opoint, opoint_byte); |
097812fb | 904 | return val >= column; /* hmm, float comparison */ |
1b15e576 | 905 | } |
993b6404 | 906 | \f |
782d260e | 907 | DEFUN ("move-to-column", Fmove_to_column, Smove_to_column, 1, 2, "p", |
8c1a1077 PJ |
908 | doc: /* Move point to column COLUMN in the current line. |
909 | The column of a character is calculated by adding together the widths | |
910 | as displayed of the previous characters in the line. | |
911 | This function ignores line-continuation; | |
912 | there is no upper limit on the column number a character can have | |
913 | and horizontal scrolling has no effect. | |
914 | ||
915 | If specified column is within a character, point goes after that character. | |
916 | If it's past end of line, point goes to end of line. | |
917 | ||
918 | A non-nil second (optional) argument FORCE means, | |
919 | if COLUMN is in the middle of a tab character, change it to spaces. | |
920 | In addition, if FORCE is t, and the line is too short | |
921 | to reach column COLUMN, add spaces/tabs to get there. | |
922 | ||
923 | The return value is the current column. */) | |
924 | (column, force) | |
993b6404 JB |
925 | Lisp_Object column, force; |
926 | { | |
927 | register int pos; | |
928 | register int col = current_column (); | |
929 | register int goal; | |
930 | register int end; | |
931 | register int tab_width = XINT (current_buffer->tab_width); | |
56a98455 | 932 | register int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
d44f12b4 | 933 | register struct Lisp_Char_Table *dp = buffer_display_table (); |
a997a7ca | 934 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
993b6404 JB |
935 | |
936 | Lisp_Object val; | |
6bbd7a29 GM |
937 | int prev_col = 0; |
938 | int c = 0; | |
58b1103e | 939 | int next_boundary, pos_byte; |
fe0066f5 | 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; |
9a21bb64 | 948 | next_boundary = pos; |
993b6404 JB |
949 | |
950 | /* If we're starting past the desired column, | |
951 | back up to beginning of line and scan from there. */ | |
952 | if (col > goal) | |
953 | { | |
9a21bb64 | 954 | end = pos; |
a997a7ca | 955 | pos = current_column_bol_cache; |
fe0066f5 | 956 | pos_byte = CHAR_TO_BYTE (pos); |
993b6404 JB |
957 | col = 0; |
958 | } | |
959 | ||
8861f16f | 960 | while (pos < end) |
993b6404 | 961 | { |
9a21bb64 RS |
962 | while (pos == next_boundary) |
963 | { | |
fe0066f5 | 964 | int prev = pos; |
9a21bb64 | 965 | pos = skip_invisible (pos, &next_boundary, end, Qnil); |
fe0066f5 RS |
966 | if (pos != prev) |
967 | pos_byte = CHAR_TO_BYTE (pos); | |
9a21bb64 RS |
968 | if (pos >= end) |
969 | goto endloop; | |
970 | } | |
971 | ||
8861f16f RS |
972 | /* Test reaching the goal column. We do this after skipping |
973 | invisible characters, so that we put point before the | |
974 | character on which the cursor will appear. */ | |
975 | if (col >= goal) | |
976 | break; | |
977 | ||
012fd715 KH |
978 | /* Check composition sequence. */ |
979 | { | |
980 | int len, len_byte, width; | |
981 | ||
982 | if (check_composition (pos, pos_byte, Z, &len, &len_byte, &width)) | |
983 | { | |
984 | pos += len; | |
985 | pos_byte += len_byte; | |
986 | col += width; | |
987 | continue; | |
988 | } | |
989 | } | |
990 | ||
fe0066f5 | 991 | c = FETCH_BYTE (pos_byte); |
88c6e37e | 992 | |
d6e483a4 RS |
993 | /* See if there is a display table and it relates |
994 | to this character. */ | |
995 | ||
c9c0f7cf KH |
996 | if (dp != 0 |
997 | && ! (multibyte && BASE_LEADING_CODE_P (c)) | |
998 | && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
f845b8b2 | 999 | { |
d6e483a4 RS |
1000 | Lisp_Object charvec; |
1001 | EMACS_INT i, n; | |
1002 | ||
1003 | /* This character is displayed using a vector of glyphs. | |
1004 | Update the position based on those glyphs. */ | |
1005 | ||
88c6e37e GM |
1006 | charvec = DISP_CHAR_VECTOR (dp, c); |
1007 | n = ASIZE (charvec); | |
88c6e37e | 1008 | |
d6e483a4 | 1009 | for (i = 0; i < n; i++) |
88c6e37e GM |
1010 | { |
1011 | /* This should be handled the same as | |
1012 | next_element_from_display_vector does it. */ | |
d6e483a4 RS |
1013 | |
1014 | Lisp_Object entry; | |
1015 | entry = AREF (charvec, i); | |
1016 | ||
88c6e37e GM |
1017 | if (INTEGERP (entry) |
1018 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
1019 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
1020 | else | |
1021 | c = ' '; | |
d6e483a4 RS |
1022 | |
1023 | if (c == '\n') | |
1024 | goto endloop; | |
1025 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
1026 | goto endloop; | |
1027 | if (c == '\t') | |
1028 | { | |
1029 | prev_col = col; | |
1030 | col += tab_width; | |
1031 | col = col / tab_width * tab_width; | |
1032 | } | |
1033 | else | |
1034 | ++col; | |
88c6e37e | 1035 | } |
d6e483a4 RS |
1036 | } |
1037 | else | |
1038 | { | |
1039 | /* The display table doesn't affect this character; | |
1040 | it displays as itself. */ | |
88c6e37e | 1041 | |
88c6e37e GM |
1042 | if (c == '\n') |
1043 | goto endloop; | |
1044 | if (c == '\r' && EQ (current_buffer->selective_display, Qt)) | |
1045 | goto endloop; | |
88c6e37e GM |
1046 | if (c == '\t') |
1047 | { | |
1048 | prev_col = col; | |
1049 | col += tab_width; | |
1050 | col = col / tab_width * tab_width; | |
1051 | } | |
1052 | else if (ctl_arrow && (c < 040 || c == 0177)) | |
1053 | col += 2; | |
1054 | else if (c < 040 || c == 0177) | |
1055 | col += 4; | |
1056 | else if (c < 0177) | |
1057 | col++; | |
1058 | else if (multibyte && BASE_LEADING_CODE_P (c)) | |
1059 | { | |
1060 | /* Start of multi-byte form. */ | |
1061 | unsigned char *ptr; | |
1062 | int bytes, width, wide_column; | |
1063 | ||
88c6e37e GM |
1064 | ptr = BYTE_POS_ADDR (pos_byte); |
1065 | MULTIBYTE_BYTES_WIDTH (ptr, dp); | |
d6e483a4 | 1066 | pos_byte += bytes - 1; |
88c6e37e GM |
1067 | col += width; |
1068 | } | |
1069 | else | |
1070 | col += 4; | |
a997a7ca | 1071 | } |
d6e483a4 RS |
1072 | |
1073 | pos++; | |
1074 | pos_byte++; | |
993b6404 | 1075 | } |
9a21bb64 | 1076 | endloop: |
993b6404 | 1077 | |
fe0066f5 | 1078 | SET_PT_BOTH (pos, pos_byte); |
993b6404 JB |
1079 | |
1080 | /* If a tab char made us overshoot, change it to spaces | |
1081 | and scan through it again. */ | |
56a98455 | 1082 | if (!NILP (force) && col > goal && c == '\t' && prev_col < goal) |
993b6404 | 1083 | { |
154a424a GM |
1084 | int goal_pt, goal_pt_byte; |
1085 | ||
1086 | /* Insert spaces in front of the tab to reach GOAL. Do this | |
1087 | first so that a marker at the end of the tab gets | |
1088 | adjusted. */ | |
1089 | SET_PT_BOTH (PT - 1, PT_BYTE - 1); | |
1090 | Finsert_char (make_number (' '), make_number (goal - prev_col), Qt); | |
1091 | ||
1092 | /* Now delete the tab, and indent to COL. */ | |
1093 | del_range (PT, PT + 1); | |
1094 | goal_pt = PT; | |
1095 | goal_pt_byte = PT_BYTE; | |
70ee42f7 | 1096 | Findent_to (make_number (col), Qnil); |
154a424a | 1097 | SET_PT_BOTH (goal_pt, goal_pt_byte); |
097812fb | 1098 | |
5a05d3d2 RS |
1099 | /* Set the last_known... vars consistently. */ |
1100 | col = goal; | |
993b6404 JB |
1101 | } |
1102 | ||
1103 | /* If line ends prematurely, add space to the end. */ | |
de4075cf | 1104 | if (col < goal && EQ (force, Qt)) |
230a4cbd | 1105 | Findent_to (make_number (col = goal), Qnil); |
993b6404 JB |
1106 | |
1107 | last_known_column = col; | |
6ec8bbd2 | 1108 | last_known_column_point = PT; |
993b6404 JB |
1109 | last_known_column_modified = MODIFF; |
1110 | ||
94d92e9c | 1111 | XSETFASTINT (val, col); |
993b6404 JB |
1112 | return val; |
1113 | } | |
1114 | \f | |
0aa01123 JB |
1115 | /* compute_motion: compute buffer posn given screen posn and vice versa */ |
1116 | ||
993b6404 JB |
1117 | struct position val_compute_motion; |
1118 | ||
1119 | /* Scan the current buffer forward from offset FROM, pretending that | |
1120 | this is at line FROMVPOS, column FROMHPOS, until reaching buffer | |
1121 | offset TO or line TOVPOS, column TOHPOS (whichever comes first), | |
0aa01123 JB |
1122 | and return the ending buffer position and screen location. If we |
1123 | can't hit the requested column exactly (because of a tab or other | |
1124 | multi-column character), overshoot. | |
993b6404 | 1125 | |
2ab90d49 KH |
1126 | DID_MOTION is 1 if FROMHPOS has already accounted for overlay strings |
1127 | at FROM. This is the case if FROMVPOS and FROMVPOS came from an | |
1128 | earlier call to compute_motion. The other common case is that FROMHPOS | |
1129 | is zero and FROM is a position that "belongs" at column zero, but might | |
1130 | be shifted by overlay strings; in this case DID_MOTION should be 0. | |
1131 | ||
993b6404 JB |
1132 | WIDTH is the number of columns available to display text; |
1133 | compute_motion uses this to handle continuation lines and such. | |
1134 | HSCROLL is the number of columns not being displayed at the left | |
1135 | margin; this is usually taken from a window's hscroll member. | |
a9764248 JB |
1136 | TAB_OFFSET is the number of columns of the first tab that aren't |
1137 | being displayed, perhaps because of a continuation line or | |
1138 | something. | |
993b6404 JB |
1139 | |
1140 | compute_motion returns a pointer to a struct position. The bufpos | |
1141 | member gives the buffer position at the end of the scan, and hpos | |
0aa01123 JB |
1142 | and vpos give its cartesian location. prevhpos is the column at |
1143 | which the character before bufpos started, and contin is non-zero | |
1144 | if we reached the current line by continuing the previous. | |
1145 | ||
1146 | Note that FROMHPOS and TOHPOS should be expressed in real screen | |
1147 | columns, taking HSCROLL and the truncation glyph at the left margin | |
1148 | into account. That is, beginning-of-line moves you to the hpos | |
1149 | -HSCROLL + (HSCROLL > 0). | |
993b6404 JB |
1150 | |
1151 | For example, to find the buffer position of column COL of line LINE | |
1152 | of a certain window, pass the window's starting location as FROM | |
1153 | and the window's upper-left coordinates as FROMVPOS and FROMHPOS. | |
1154 | Pass the buffer's ZV as TO, to limit the scan to the end of the | |
1155 | visible section of the buffer, and pass LINE and COL as TOVPOS and | |
2ff4775b | 1156 | TOHPOS. |
993b6404 JB |
1157 | |
1158 | When displaying in window w, a typical formula for WIDTH is: | |
1159 | ||
1160 | window_width - 1 | |
a3c87d4e | 1161 | - (has_vertical_scroll_bars |
40284d6b | 1162 | ? FRAME_SCROLL_BAR_COLS (XFRAME (window->frame)) |
fa61c701 | 1163 | : (window_width + window_left != frame_width)) |
993b6404 JB |
1164 | |
1165 | where | |
1166 | window_width is XFASTINT (w->width), | |
1167 | window_left is XFASTINT (w->left), | |
a3c87d4e JB |
1168 | has_vertical_scroll_bars is |
1169 | FRAME_HAS_VERTICAL_SCROLL_BARS (XFRAME (WINDOW_FRAME (window))) | |
fa61c701 | 1170 | and frame_width = FRAME_WIDTH (XFRAME (window->frame)) |
993b6404 | 1171 | |
1827d036 KH |
1172 | Or you can let window_internal_width do this all for you, and write: |
1173 | window_internal_width (w) - 1 | |
fa61c701 JB |
1174 | |
1175 | The `-1' accounts for the continuation-line backslashes; the rest | |
7e7a76b5 | 1176 | accounts for window borders if the window is split horizontally, and |
1827d036 | 1177 | the scroll bars if they are turned on. */ |
993b6404 JB |
1178 | |
1179 | struct position * | |
2ab90d49 | 1180 | compute_motion (from, fromvpos, fromhpos, did_motion, to, tovpos, tohpos, width, hscroll, tab_offset, win) |
993b6404 | 1181 | int from, fromvpos, fromhpos, to, tovpos, tohpos; |
2ab90d49 | 1182 | int did_motion; |
993b6404 JB |
1183 | register int width; |
1184 | int hscroll, tab_offset; | |
88af3af4 | 1185 | struct window *win; |
993b6404 | 1186 | { |
cde9337b JB |
1187 | register int hpos = fromhpos; |
1188 | register int vpos = fromvpos; | |
1189 | ||
993b6404 | 1190 | register int pos; |
fe0066f5 | 1191 | int pos_byte; |
6bbd7a29 | 1192 | register int c = 0; |
993b6404 | 1193 | register int tab_width = XFASTINT (current_buffer->tab_width); |
56a98455 | 1194 | register int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
d44f12b4 | 1195 | register struct Lisp_Char_Table *dp = window_display_table (win); |
993b6404 | 1196 | int selective |
eeaafd4f | 1197 | = (INTEGERP (current_buffer->selective_display) |
69eaf10d RS |
1198 | ? XINT (current_buffer->selective_display) |
1199 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
a997a7ca | 1200 | int prev_hpos = 0; |
993b6404 | 1201 | int selective_rlen |
eeaafd4f | 1202 | = (selective && dp && VECTORP (DISP_INVIS_VECTOR (dp)) |
dea4d2e6 | 1203 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size : 0); |
2ab90d49 KH |
1204 | /* The next location where the `invisible' property changes, or an |
1205 | overlay starts or ends. */ | |
1206 | int next_boundary = from; | |
993b6404 | 1207 | |
0aa01123 JB |
1208 | /* For computing runs of characters with similar widths. |
1209 | Invariant: width_run_width is zero, or all the characters | |
2ff4775b | 1210 | from width_run_start to width_run_end have a fixed width of |
0aa01123 JB |
1211 | width_run_width. */ |
1212 | int width_run_start = from; | |
1213 | int width_run_end = from; | |
1214 | int width_run_width = 0; | |
1215 | Lisp_Object *width_table; | |
66c75ca5 | 1216 | Lisp_Object buffer; |
0aa01123 JB |
1217 | |
1218 | /* The next buffer pos where we should consult the width run cache. */ | |
1219 | int next_width_run = from; | |
0e435804 | 1220 | Lisp_Object window; |
0aa01123 | 1221 | |
a997a7ca | 1222 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
c71c19f4 RS |
1223 | /* If previous char scanned was a wide character, |
1224 | this is the column where it ended. Otherwise, this is 0. */ | |
1225 | int wide_column_end_hpos = 0; | |
a997a7ca | 1226 | int prev_pos; /* Previous buffer position. */ |
fe0066f5 | 1227 | int prev_pos_byte; /* Previous buffer position. */ |
a997a7ca KH |
1228 | int contin_hpos; /* HPOS of last column of continued line. */ |
1229 | int prev_tab_offset; /* Previous tab offset. */ | |
1230 | ||
66c75ca5 | 1231 | XSETBUFFER (buffer, current_buffer); |
0e435804 | 1232 | XSETWINDOW (window, win); |
66c75ca5 | 1233 | |
0aa01123 JB |
1234 | width_run_cache_on_off (); |
1235 | if (dp == buffer_display_table ()) | |
1236 | width_table = (VECTORP (current_buffer->width_table) | |
1237 | ? XVECTOR (current_buffer->width_table)->contents | |
1238 | : 0); | |
1239 | else | |
1240 | /* If the window has its own display table, we can't use the width | |
1241 | run cache, because that's based on the buffer's display table. */ | |
1242 | width_table = 0; | |
1243 | ||
e4500116 GM |
1244 | if (tab_width <= 0 || tab_width > 1000) |
1245 | tab_width = 8; | |
1246 | ||
1247 | immediate_quit = 1; | |
1248 | QUIT; | |
cde9337b | 1249 | |
a997a7ca | 1250 | pos = prev_pos = from; |
fe0066f5 | 1251 | pos_byte = prev_pos_byte = CHAR_TO_BYTE (from); |
a997a7ca KH |
1252 | contin_hpos = 0; |
1253 | prev_tab_offset = tab_offset; | |
2ab90d49 KH |
1254 | while (1) |
1255 | { | |
1256 | while (pos == next_boundary) | |
f75c0f8a | 1257 | { |
fe0066f5 | 1258 | int pos_here = pos; |
98136db3 RS |
1259 | int newpos; |
1260 | ||
f9ba10b0 | 1261 | /* Don't skip invisible if we are already at the margin. */ |
8a00d895 | 1262 | if (vpos > tovpos || (vpos == tovpos && hpos >= tohpos)) |
f9ba10b0 RS |
1263 | { |
1264 | if (contin_hpos && prev_hpos == 0 | |
1265 | && hpos > tohpos | |
1266 | && (contin_hpos == width || wide_column_end_hpos > width)) | |
1267 | { /* Line breaks because we can't put the character at the | |
1268 | previous line any more. It is not the multi-column | |
1269 | character continued in middle. Go back to previous | |
1270 | buffer position, screen position, and set tab offset | |
1271 | to previous value. It's the beginning of the | |
1272 | line. */ | |
1273 | pos = prev_pos; | |
1274 | pos_byte = prev_pos_byte; | |
1275 | hpos = prev_hpos; | |
1276 | tab_offset = prev_tab_offset; | |
1277 | } | |
1278 | break; | |
1279 | } | |
1280 | ||
2ab90d49 KH |
1281 | /* If the caller says that the screen position came from an earlier |
1282 | call to compute_motion, then we've already accounted for the | |
1283 | overlay strings at point. This is only true the first time | |
1284 | through, so clear the flag after testing it. */ | |
1285 | if (!did_motion) | |
1286 | /* We need to skip past the overlay strings. Currently those | |
a997a7ca | 1287 | strings must not contain TAB; |
2ab90d49 KH |
1288 | if we want to relax that restriction, something will have |
1289 | to be changed here. */ | |
a997a7ca KH |
1290 | { |
1291 | unsigned char *ovstr; | |
1292 | int ovlen = overlay_strings (pos, win, &ovstr); | |
4116deee KH |
1293 | hpos += ((multibyte && ovlen > 0) |
1294 | ? strwidth (ovstr, ovlen) : ovlen); | |
a997a7ca | 1295 | } |
2ab90d49 KH |
1296 | did_motion = 0; |
1297 | ||
1298 | if (pos >= to) | |
1299 | break; | |
66c75ca5 | 1300 | |
9a21bb64 RS |
1301 | /* Advance POS past invisible characters |
1302 | (but not necessarily all that there are here), | |
1303 | and store in next_boundary the next position where | |
1304 | we need to call skip_invisible. */ | |
98136db3 RS |
1305 | newpos = skip_invisible (pos, &next_boundary, to, window); |
1306 | ||
1307 | if (newpos >= to) | |
e8cb089b RS |
1308 | { |
1309 | pos = min (to, newpos); | |
bcfbd63d | 1310 | pos_byte = CHAR_TO_BYTE (pos); |
e8cb089b RS |
1311 | goto after_loop; |
1312 | } | |
98136db3 | 1313 | |
fe0066f5 RS |
1314 | if (newpos != pos_here) |
1315 | { | |
1316 | pos = newpos; | |
1317 | pos_byte = CHAR_TO_BYTE (pos); | |
1318 | } | |
f75c0f8a | 1319 | } |
2ab90d49 KH |
1320 | |
1321 | /* Handle right margin. */ | |
a997a7ca KH |
1322 | /* Note on a wide-column character. |
1323 | ||
1324 | Characters are classified into the following three categories | |
1325 | according to the width (columns occupied on screen). | |
1326 | ||
1327 | (1) single-column character: ex. `a' | |
1328 | (2) multi-column character: ex. `^A', TAB, `\033' | |
1329 | (3) wide-column character: ex. Japanese character, Chinese character | |
1330 | (In the following example, `W_' stands for them.) | |
1331 | ||
1332 | Multi-column characters can be divided around the right margin, | |
1333 | but wide-column characters cannot. | |
1334 | ||
1335 | NOTE: | |
1336 | ||
1337 | (*) The cursor is placed on the next character after the point. | |
1338 | ||
1339 | ---------- | |
1340 | abcdefghi\ | |
1341 | j ^---- next after the point | |
1342 | ^--- next char. after the point. | |
1343 | ---------- | |
1344 | In case of sigle-column character | |
1345 | ||
1346 | ---------- | |
1347 | abcdefgh\\ | |
1348 | 033 ^---- next after the point, next char. after the point. | |
1349 | ---------- | |
1350 | In case of multi-column character | |
1351 | ||
1352 | ---------- | |
1353 | abcdefgh\\ | |
1354 | W_ ^---- next after the point | |
1355 | ^---- next char. after the point. | |
1356 | ---------- | |
097812fb | 1357 | In case of wide-column character |
a997a7ca KH |
1358 | |
1359 | The problem here is continuation at a wide-column character. | |
1360 | In this case, the line may shorter less than WIDTH. | |
1361 | And we find the continuation AFTER it occurs. | |
1362 | ||
1363 | */ | |
1364 | ||
1365 | if (hpos > width) | |
2ab90d49 KH |
1366 | { |
1367 | if (hscroll | |
1368 | || (truncate_partial_width_windows | |
1369 | && width + 1 < FRAME_WIDTH (XFRAME (WINDOW_FRAME (win)))) | |
1370 | || !NILP (current_buffer->truncate_lines)) | |
1371 | { | |
529724fe AS |
1372 | /* Truncating: skip to newline, unless we are already past |
1373 | TO (we need to go back below). */ | |
1374 | if (pos <= to) | |
fe0066f5 RS |
1375 | { |
1376 | pos = find_before_next_newline (pos, to, 1); | |
1377 | pos_byte = CHAR_TO_BYTE (pos); | |
529724fe AS |
1378 | hpos = width; |
1379 | /* If we just skipped next_boundary, | |
1380 | loop around in the main while | |
1381 | and handle it. */ | |
1382 | if (pos >= next_boundary) | |
1383 | next_boundary = pos + 1; | |
1384 | prev_hpos = width; | |
1385 | prev_tab_offset = tab_offset; | |
fe0066f5 | 1386 | } |
2ab90d49 KH |
1387 | } |
1388 | else | |
1389 | { | |
1390 | /* Continuing. */ | |
a997a7ca KH |
1391 | /* Remember the previous value. */ |
1392 | prev_tab_offset = tab_offset; | |
1393 | ||
c9c0f7cf | 1394 | if (wide_column_end_hpos > width) |
a997a7ca KH |
1395 | { |
1396 | hpos -= prev_hpos; | |
1397 | tab_offset += prev_hpos; | |
1398 | } | |
1399 | else | |
1400 | { | |
1401 | tab_offset += width; | |
1402 | hpos -= width; | |
1403 | } | |
1404 | vpos++; | |
1405 | contin_hpos = prev_hpos; | |
1406 | prev_hpos = 0; | |
2ab90d49 KH |
1407 | } |
1408 | } | |
1409 | ||
1410 | /* Stop if past the target buffer position or screen position. */ | |
33fe7d20 | 1411 | if (pos > to) |
a997a7ca KH |
1412 | { |
1413 | /* Go back to the previous position. */ | |
1414 | pos = prev_pos; | |
fe0066f5 | 1415 | pos_byte = prev_pos_byte; |
a997a7ca KH |
1416 | hpos = prev_hpos; |
1417 | tab_offset = prev_tab_offset; | |
1418 | ||
1419 | /* NOTE on contin_hpos, hpos, and prev_hpos. | |
1420 | ||
1421 | ---------- | |
1422 | abcdefgh\\ | |
1423 | W_ ^---- contin_hpos | |
1424 | | ^----- hpos | |
1425 | \---- prev_hpos | |
1426 | ---------- | |
1427 | */ | |
1428 | ||
1429 | if (contin_hpos && prev_hpos == 0 | |
c9c0f7cf | 1430 | && contin_hpos < width && !wide_column_end_hpos) |
a997a7ca KH |
1431 | { |
1432 | /* Line breaking occurs in the middle of multi-column | |
1433 | character. Go back to previous line. */ | |
1434 | hpos = contin_hpos; | |
1435 | vpos = vpos - 1; | |
1436 | } | |
1437 | else if (c == '\n') | |
1438 | /* If previous character is NEWLINE, | |
1439 | set VPOS back to previous line */ | |
1440 | vpos = vpos - 1; | |
1441 | break; | |
1442 | } | |
1443 | ||
8a00d895 | 1444 | if (vpos > tovpos || (vpos == tovpos && hpos >= tohpos)) |
33fe7d20 RS |
1445 | { |
1446 | if (contin_hpos && prev_hpos == 0 | |
9129bcc3 KH |
1447 | && hpos > tohpos |
1448 | && (contin_hpos == width || wide_column_end_hpos > width)) | |
33fe7d20 RS |
1449 | { /* Line breaks because we can't put the character at the |
1450 | previous line any more. It is not the multi-column | |
1451 | character continued in middle. Go back to previous | |
1452 | buffer position, screen position, and set tab offset | |
1453 | to previous value. It's the beginning of the | |
1454 | line. */ | |
1455 | pos = prev_pos; | |
1456 | pos_byte = prev_pos_byte; | |
1457 | hpos = prev_hpos; | |
1458 | tab_offset = prev_tab_offset; | |
1459 | } | |
1460 | break; | |
1461 | } | |
a997a7ca | 1462 | if (pos == ZV) /* We cannot go beyond ZV. Stop here. */ |
2ab90d49 KH |
1463 | break; |
1464 | ||
2ab90d49 | 1465 | prev_hpos = hpos; |
a997a7ca | 1466 | prev_pos = pos; |
fe0066f5 | 1467 | prev_pos_byte = pos_byte; |
c9c0f7cf | 1468 | wide_column_end_hpos = 0; |
0aa01123 JB |
1469 | |
1470 | /* Consult the width run cache to see if we can avoid inspecting | |
1471 | the text character-by-character. */ | |
1472 | if (current_buffer->width_run_cache && pos >= next_width_run) | |
1473 | { | |
1474 | int run_end; | |
1475 | int common_width | |
1476 | = region_cache_forward (current_buffer, | |
1477 | current_buffer->width_run_cache, | |
1478 | pos, &run_end); | |
1479 | ||
1480 | /* A width of zero means the character's width varies (like | |
1481 | a tab), is meaningless (like a newline), or we just don't | |
1482 | want to skip over it for some other reason. */ | |
1483 | if (common_width != 0) | |
1484 | { | |
1485 | int run_end_hpos; | |
1486 | ||
1487 | /* Don't go past the final buffer posn the user | |
1488 | requested. */ | |
1489 | if (run_end > to) | |
1490 | run_end = to; | |
1491 | ||
1492 | run_end_hpos = hpos + (run_end - pos) * common_width; | |
1493 | ||
1494 | /* Don't go past the final horizontal position the user | |
1495 | requested. */ | |
1496 | if (vpos == tovpos && run_end_hpos > tohpos) | |
1497 | { | |
1498 | run_end = pos + (tohpos - hpos) / common_width; | |
1499 | run_end_hpos = hpos + (run_end - pos) * common_width; | |
1500 | } | |
2ff4775b | 1501 | |
0aa01123 JB |
1502 | /* Don't go past the margin. */ |
1503 | if (run_end_hpos >= width) | |
1504 | { | |
1505 | run_end = pos + (width - hpos) / common_width; | |
1506 | run_end_hpos = hpos + (run_end - pos) * common_width; | |
1507 | } | |
1508 | ||
1509 | hpos = run_end_hpos; | |
1510 | if (run_end > pos) | |
1511 | prev_hpos = hpos - common_width; | |
fe0066f5 RS |
1512 | if (pos != run_end) |
1513 | { | |
1514 | pos = run_end; | |
1515 | pos_byte = CHAR_TO_BYTE (pos); | |
1516 | } | |
0aa01123 JB |
1517 | } |
1518 | ||
1519 | next_width_run = run_end + 1; | |
1520 | } | |
1521 | ||
1522 | /* We have to scan the text character-by-character. */ | |
993b6404 | 1523 | else |
2ab90d49 | 1524 | { |
88c6e37e GM |
1525 | EMACS_INT i, n; |
1526 | Lisp_Object charvec; | |
097812fb | 1527 | |
fe0066f5 | 1528 | c = FETCH_BYTE (pos_byte); |
012fd715 KH |
1529 | |
1530 | /* Check composition sequence. */ | |
1531 | { | |
1532 | int len, len_byte, width; | |
1533 | ||
1534 | if (check_composition (pos, pos_byte, to, &len, &len_byte, &width)) | |
1535 | { | |
1536 | pos += len; | |
1537 | pos_byte += len_byte; | |
1538 | hpos += width; | |
1539 | continue; | |
1540 | } | |
1541 | } | |
1542 | ||
fe0066f5 | 1543 | pos++, pos_byte++; |
0aa01123 | 1544 | |
2ab90d49 KH |
1545 | /* Perhaps add some info to the width_run_cache. */ |
1546 | if (current_buffer->width_run_cache) | |
1547 | { | |
1548 | /* Is this character part of the current run? If so, extend | |
1549 | the run. */ | |
1550 | if (pos - 1 == width_run_end | |
5db0afb7 | 1551 | && XFASTINT (width_table[c]) == width_run_width) |
2ab90d49 KH |
1552 | width_run_end = pos; |
1553 | ||
1554 | /* The previous run is over, since this is a character at a | |
1555 | different position, or a different width. */ | |
1556 | else | |
1557 | { | |
1558 | /* Have we accumulated a run to put in the cache? | |
1559 | (Currently, we only cache runs of width == 1). */ | |
1560 | if (width_run_start < width_run_end | |
1561 | && width_run_width == 1) | |
1562 | know_region_cache (current_buffer, | |
1563 | current_buffer->width_run_cache, | |
1564 | width_run_start, width_run_end); | |
1565 | ||
1566 | /* Start recording a new width run. */ | |
5db0afb7 | 1567 | width_run_width = XFASTINT (width_table[c]); |
2ab90d49 KH |
1568 | width_run_start = pos - 1; |
1569 | width_run_end = pos; | |
1570 | } | |
1571 | } | |
993b6404 | 1572 | |
c9c0f7cf KH |
1573 | if (dp != 0 |
1574 | && ! (multibyte && BASE_LEADING_CODE_P (c)) | |
1575 | && VECTORP (DISP_CHAR_VECTOR (dp, c))) | |
993b6404 | 1576 | { |
88c6e37e GM |
1577 | charvec = DISP_CHAR_VECTOR (dp, c); |
1578 | n = ASIZE (charvec); | |
993b6404 | 1579 | } |
88c6e37e | 1580 | else |
993b6404 | 1581 | { |
88c6e37e GM |
1582 | charvec = Qnil; |
1583 | n = 1; | |
1584 | } | |
1585 | ||
1586 | for (i = n - 1; i >= 0; --i) | |
1587 | { | |
1588 | if (VECTORP (charvec)) | |
2ab90d49 | 1589 | { |
88c6e37e GM |
1590 | /* This should be handled the same as |
1591 | next_element_from_display_vector does it. */ | |
1592 | Lisp_Object entry = AREF (charvec, i); | |
097812fb | 1593 | |
88c6e37e GM |
1594 | if (INTEGERP (entry) |
1595 | && GLYPH_CHAR_VALID_P (XFASTINT (entry))) | |
1596 | c = FAST_GLYPH_CHAR (XFASTINT (entry)); | |
1597 | else | |
1598 | c = ' '; | |
1599 | } | |
097812fb | 1600 | |
88c6e37e GM |
1601 | if (c >= 040 && c < 0177) |
1602 | hpos++; | |
1603 | else if (c == '\t') | |
1604 | { | |
1605 | int tem = ((hpos + tab_offset + hscroll - (hscroll > 0)) | |
1606 | % tab_width); | |
1607 | if (tem < 0) | |
1608 | tem += tab_width; | |
1609 | hpos += tab_width - tem; | |
1610 | } | |
1611 | else if (c == '\n') | |
1612 | { | |
1613 | if (selective > 0 | |
097812fb | 1614 | && indented_beyond_p (pos, pos_byte, |
76e20cb0 | 1615 | (double) selective)) /* iftc */ |
2ab90d49 | 1616 | { |
88c6e37e GM |
1617 | /* If (pos == to), we don't have to take care of |
1618 | selective display. */ | |
1619 | if (pos < to) | |
fe0066f5 | 1620 | { |
88c6e37e GM |
1621 | /* Skip any number of invisible lines all at once */ |
1622 | do | |
1623 | { | |
1624 | pos = find_before_next_newline (pos, to, 1); | |
1625 | if (pos < to) | |
1626 | pos++; | |
1627 | pos_byte = CHAR_TO_BYTE (pos); | |
1628 | } | |
1629 | while (pos < to | |
097812fb | 1630 | && indented_beyond_p (pos, pos_byte, |
76e20cb0 | 1631 | (double) selective)); /* iftc */ |
88c6e37e GM |
1632 | /* Allow for the " ..." that is displayed for them. */ |
1633 | if (selective_rlen) | |
1634 | { | |
1635 | hpos += selective_rlen; | |
1636 | if (hpos >= width) | |
1637 | hpos = width; | |
1638 | } | |
1639 | DEC_BOTH (pos, pos_byte); | |
1640 | /* We have skipped the invis text, but not the | |
1641 | newline after. */ | |
fe0066f5 | 1642 | } |
2ab90d49 | 1643 | } |
88c6e37e GM |
1644 | else |
1645 | { | |
1646 | /* A visible line. */ | |
1647 | vpos++; | |
1648 | hpos = 0; | |
1649 | hpos -= hscroll; | |
1650 | /* Count the truncation glyph on column 0 */ | |
1651 | if (hscroll > 0) | |
1652 | hpos++; | |
1653 | tab_offset = 0; | |
1654 | } | |
1655 | contin_hpos = 0; | |
2ab90d49 | 1656 | } |
88c6e37e | 1657 | else if (c == CR && selective < 0) |
fe0066f5 | 1658 | { |
88c6e37e GM |
1659 | /* In selective display mode, |
1660 | everything from a ^M to the end of the line is invisible. | |
1661 | Stop *before* the real newline. */ | |
1662 | if (pos < to) | |
1663 | { | |
1664 | pos = find_before_next_newline (pos, to, 1); | |
1665 | pos_byte = CHAR_TO_BYTE (pos); | |
1666 | } | |
1667 | /* If we just skipped next_boundary, | |
1668 | loop around in the main while | |
1669 | and handle it. */ | |
1670 | if (pos > next_boundary) | |
1671 | next_boundary = pos; | |
1672 | /* Allow for the " ..." that is displayed for them. */ | |
1673 | if (selective_rlen) | |
1674 | { | |
1675 | hpos += selective_rlen; | |
1676 | if (hpos >= width) | |
1677 | hpos = width; | |
1678 | } | |
fe0066f5 | 1679 | } |
88c6e37e | 1680 | else if (multibyte && BASE_LEADING_CODE_P (c)) |
2ab90d49 | 1681 | { |
88c6e37e GM |
1682 | /* Start of multi-byte form. */ |
1683 | unsigned char *ptr; | |
1684 | int bytes, width, wide_column; | |
1685 | ||
1686 | pos_byte--; /* rewind POS_BYTE */ | |
1687 | ptr = BYTE_POS_ADDR (pos_byte); | |
1688 | MULTIBYTE_BYTES_WIDTH (ptr, dp); | |
1689 | pos_byte += bytes; | |
1690 | if (wide_column) | |
1691 | wide_column_end_hpos = hpos + wide_column; | |
1692 | hpos += width; | |
2ab90d49 | 1693 | } |
f1004faf GM |
1694 | else if (VECTORP (charvec)) |
1695 | ++hpos; | |
88c6e37e GM |
1696 | else |
1697 | hpos += (ctl_arrow && c < 0200) ? 2 : 4; | |
2ab90d49 | 1698 | } |
993b6404 JB |
1699 | } |
1700 | } | |
1701 | ||
98136db3 RS |
1702 | after_loop: |
1703 | ||
0aa01123 JB |
1704 | /* Remember any final width run in the cache. */ |
1705 | if (current_buffer->width_run_cache | |
1706 | && width_run_width == 1 | |
1707 | && width_run_start < width_run_end) | |
1708 | know_region_cache (current_buffer, current_buffer->width_run_cache, | |
1709 | width_run_start, width_run_end); | |
1710 | ||
993b6404 | 1711 | val_compute_motion.bufpos = pos; |
fe0066f5 | 1712 | val_compute_motion.bytepos = pos_byte; |
cde9337b JB |
1713 | val_compute_motion.hpos = hpos; |
1714 | val_compute_motion.vpos = vpos; | |
ef3af330 AS |
1715 | if (contin_hpos && prev_hpos == 0) |
1716 | val_compute_motion.prevhpos = contin_hpos; | |
1717 | else | |
1718 | val_compute_motion.prevhpos = prev_hpos; | |
927b5a55 RS |
1719 | /* We alalways handle all of them here; none of them remain to do. */ |
1720 | val_compute_motion.ovstring_chars_done = 0; | |
993b6404 JB |
1721 | |
1722 | /* Nonzero if have just continued a line */ | |
a997a7ca | 1723 | val_compute_motion.contin = (contin_hpos && prev_hpos == 0); |
993b6404 | 1724 | |
e4500116 | 1725 | immediate_quit = 0; |
993b6404 JB |
1726 | return &val_compute_motion; |
1727 | } | |
993b6404 | 1728 | |
8720a429 | 1729 | |
88af3af4 | 1730 | DEFUN ("compute-motion", Fcompute_motion, Scompute_motion, 7, 7, 0, |
8c1a1077 PJ |
1731 | doc: /* Scan through the current buffer, calculating screen position. |
1732 | Scan the current buffer forward from offset FROM, | |
1733 | assuming it is at position FROMPOS--a cons of the form (HPOS . VPOS)-- | |
1734 | to position TO or position TOPOS--another cons of the form (HPOS . VPOS)-- | |
1735 | and return the ending buffer position and screen location. | |
1736 | ||
1737 | There are three additional arguments: | |
1738 | ||
1739 | WIDTH is the number of columns available to display text; | |
1740 | this affects handling of continuation lines. | |
1741 | This is usually the value returned by `window-width', less one (to allow | |
1742 | for the continuation glyph). | |
1743 | ||
1744 | OFFSETS is either nil or a cons cell (HSCROLL . TAB-OFFSET). | |
1745 | HSCROLL is the number of columns not being displayed at the left | |
1746 | margin; this is usually taken from a window's hscroll member. | |
1747 | TAB-OFFSET is the number of columns of the first tab that aren't | |
1748 | being displayed, perhaps because the line was continued within it. | |
1749 | If OFFSETS is nil, HSCROLL and TAB-OFFSET are assumed to be zero. | |
1750 | ||
1751 | WINDOW is the window to operate on. It is used to choose the display table; | |
1752 | if it is showing the current buffer, it is used also for | |
1753 | deciding which overlay properties apply. | |
1754 | Note that `compute-motion' always operates on the current buffer. | |
1755 | ||
1756 | The value is a list of five elements: | |
1757 | (POS HPOS VPOS PREVHPOS CONTIN) | |
1758 | POS is the buffer position where the scan stopped. | |
1759 | VPOS is the vertical position where the scan stopped. | |
1760 | HPOS is the horizontal position where the scan stopped. | |
1761 | ||
1762 | PREVHPOS is the horizontal position one character back from POS. | |
1763 | CONTIN is t if a line was continued after (or within) the previous character. | |
1764 | ||
1765 | For example, to find the buffer position of column COL of line LINE | |
1766 | of a certain window, pass the window's starting location as FROM | |
1767 | and the window's upper-left coordinates as FROMPOS. | |
1768 | Pass the buffer's (point-max) as TO, to limit the scan to the end of the | |
1769 | visible section of the buffer, and pass LINE and COL as TOPOS. */) | |
1770 | (from, frompos, to, topos, width, offsets, window) | |
42918ba5 | 1771 | Lisp_Object from, frompos, to, topos; |
88af3af4 | 1772 | Lisp_Object width, offsets, window; |
42918ba5 | 1773 | { |
8798a92b | 1774 | Lisp_Object bufpos, hpos, vpos, prevhpos; |
42918ba5 RS |
1775 | struct position *pos; |
1776 | int hscroll, tab_offset; | |
1777 | ||
b7826503 PJ |
1778 | CHECK_NUMBER_COERCE_MARKER (from); |
1779 | CHECK_CONS (frompos); | |
1780 | CHECK_NUMBER_CAR (frompos); | |
1781 | CHECK_NUMBER_CDR (frompos); | |
1782 | CHECK_NUMBER_COERCE_MARKER (to); | |
1783 | CHECK_CONS (topos); | |
1784 | CHECK_NUMBER_CAR (topos); | |
1785 | CHECK_NUMBER_CDR (topos); | |
1786 | CHECK_NUMBER (width); | |
42918ba5 RS |
1787 | if (!NILP (offsets)) |
1788 | { | |
b7826503 PJ |
1789 | CHECK_CONS (offsets); |
1790 | CHECK_NUMBER_CAR (offsets); | |
1791 | CHECK_NUMBER_CDR (offsets); | |
70949dac KR |
1792 | hscroll = XINT (XCAR (offsets)); |
1793 | tab_offset = XINT (XCDR (offsets)); | |
42918ba5 RS |
1794 | } |
1795 | else | |
1796 | hscroll = tab_offset = 0; | |
1797 | ||
88af3af4 KH |
1798 | if (NILP (window)) |
1799 | window = Fselected_window (); | |
1800 | else | |
b7826503 | 1801 | CHECK_LIVE_WINDOW (window); |
88af3af4 | 1802 | |
9fdae274 KH |
1803 | if (XINT (from) < BEGV || XINT (from) > ZV) |
1804 | args_out_of_range_3 (from, make_number (BEGV), make_number (ZV)); | |
1805 | if (XINT (to) < BEGV || XINT (to) > ZV) | |
1806 | args_out_of_range_3 (to, make_number (BEGV), make_number (ZV)); | |
1807 | ||
70949dac KR |
1808 | pos = compute_motion (XINT (from), XINT (XCDR (frompos)), |
1809 | XINT (XCAR (frompos)), 0, | |
1810 | XINT (to), XINT (XCDR (topos)), | |
1811 | XINT (XCAR (topos)), | |
88af3af4 KH |
1812 | XINT (width), hscroll, tab_offset, |
1813 | XWINDOW (window)); | |
42918ba5 | 1814 | |
94d92e9c | 1815 | XSETFASTINT (bufpos, pos->bufpos); |
f8f645a1 KH |
1816 | XSETINT (hpos, pos->hpos); |
1817 | XSETINT (vpos, pos->vpos); | |
1818 | XSETINT (prevhpos, pos->prevhpos); | |
42918ba5 RS |
1819 | |
1820 | return Fcons (bufpos, | |
1821 | Fcons (hpos, | |
1822 | Fcons (vpos, | |
1823 | Fcons (prevhpos, | |
1824 | Fcons (pos->contin ? Qt : Qnil, Qnil))))); | |
1825 | ||
1826 | } | |
993b6404 | 1827 | \f |
0aa01123 | 1828 | /* Fvertical_motion and vmotion */ |
88c6e37e | 1829 | |
993b6404 JB |
1830 | struct position val_vmotion; |
1831 | ||
1832 | struct position * | |
99ce22d5 KH |
1833 | vmotion (from, vtarget, w) |
1834 | register int from, vtarget; | |
1835 | struct window *w; | |
993b6404 | 1836 | { |
99ce22d5 KH |
1837 | int width = window_internal_width (w) - 1; |
1838 | int hscroll = XINT (w->hscroll); | |
993b6404 JB |
1839 | struct position pos; |
1840 | /* vpos is cumulative vertical position, changed as from is changed */ | |
1841 | register int vpos = 0; | |
92992c7e | 1842 | Lisp_Object prevline; |
993b6404 | 1843 | register int first; |
fe0066f5 | 1844 | int from_byte; |
993b6404 JB |
1845 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; |
1846 | int selective | |
eeaafd4f KH |
1847 | = (INTEGERP (current_buffer->selective_display) |
1848 | ? XINT (current_buffer->selective_display) | |
1849 | : !NILP (current_buffer->selective_display) ? -1 : 0); | |
99ce22d5 KH |
1850 | Lisp_Object window; |
1851 | int start_hpos = 0; | |
2ab90d49 | 1852 | int did_motion; |
7ac57cb3 RS |
1853 | /* This is the object we use for fetching character properties. */ |
1854 | Lisp_Object text_prop_object; | |
99ce22d5 KH |
1855 | |
1856 | XSETWINDOW (window, w); | |
1857 | ||
7ac57cb3 RS |
1858 | /* If the window contains this buffer, use it for getting text properties. |
1859 | Otherwise use the current buffer as arg for doing that. */ | |
1860 | if (EQ (w->buffer, Fcurrent_buffer ())) | |
1861 | text_prop_object = window; | |
1862 | else | |
1863 | text_prop_object = Fcurrent_buffer (); | |
1864 | ||
99ce22d5 | 1865 | if (vpos >= vtarget) |
993b6404 | 1866 | { |
99ce22d5 | 1867 | /* To move upward, go a line at a time until |
fe0066f5 | 1868 | we have gone at least far enough. */ |
99ce22d5 KH |
1869 | |
1870 | first = 1; | |
1871 | ||
1872 | while ((vpos > vtarget || first) && from > BEGV) | |
993b6404 | 1873 | { |
66c75ca5 RS |
1874 | Lisp_Object propval; |
1875 | ||
99ce22d5 | 1876 | XSETFASTINT (prevline, find_next_newline_no_quit (from - 1, -1)); |
92992c7e | 1877 | while (XFASTINT (prevline) > BEGV |
5a05d3d2 | 1878 | && ((selective > 0 |
fe0066f5 RS |
1879 | && indented_beyond_p (XFASTINT (prevline), |
1880 | CHAR_TO_BYTE (XFASTINT (prevline)), | |
76e20cb0 | 1881 | (double) selective)) /* iftc */ |
5a05d3d2 | 1882 | /* watch out for newlines with `invisible' property */ |
66c75ca5 RS |
1883 | || (propval = Fget_char_property (prevline, |
1884 | Qinvisible, | |
7ac57cb3 | 1885 | text_prop_object), |
339ee979 | 1886 | TEXT_PROP_MEANS_INVISIBLE (propval)))) |
94d92e9c KH |
1887 | XSETFASTINT (prevline, |
1888 | find_next_newline_no_quit (XFASTINT (prevline) - 1, | |
1889 | -1)); | |
92992c7e | 1890 | pos = *compute_motion (XFASTINT (prevline), 0, |
99ce22d5 | 1891 | lmargin + (XFASTINT (prevline) == BEG |
92992c7e | 1892 | ? start_hpos : 0), |
2ab90d49 | 1893 | 0, |
097812fb | 1894 | from, |
a997a7ca KH |
1895 | /* Don't care for VPOS... */ |
1896 | 1 << (BITS_PER_SHORT - 1), | |
1897 | /* ... nor HPOS. */ | |
1898 | 1 << (BITS_PER_SHORT - 1), | |
2dd4e608 RS |
1899 | width, hscroll, |
1900 | /* This compensates for start_hpos | |
1901 | so that a tab as first character | |
1902 | still occupies 8 columns. */ | |
1903 | (XFASTINT (prevline) == BEG | |
1904 | ? -start_hpos : 0), | |
1905 | w); | |
99ce22d5 KH |
1906 | vpos -= pos.vpos; |
1907 | first = 0; | |
1908 | from = XFASTINT (prevline); | |
993b6404 | 1909 | } |
99ce22d5 KH |
1910 | |
1911 | /* If we made exactly the desired vertical distance, | |
1912 | or if we hit beginning of buffer, | |
1913 | return point found */ | |
1914 | if (vpos >= vtarget) | |
993b6404 | 1915 | { |
99ce22d5 | 1916 | val_vmotion.bufpos = from; |
fe0066f5 | 1917 | val_vmotion.bytepos = CHAR_TO_BYTE (from); |
99ce22d5 KH |
1918 | val_vmotion.vpos = vpos; |
1919 | val_vmotion.hpos = lmargin; | |
1920 | val_vmotion.contin = 0; | |
1921 | val_vmotion.prevhpos = 0; | |
927b5a55 | 1922 | val_vmotion.ovstring_chars_done = 0; |
a997a7ca | 1923 | val_vmotion.tab_offset = 0; /* For accumulating tab offset. */ |
99ce22d5 | 1924 | return &val_vmotion; |
993b6404 | 1925 | } |
993b6404 | 1926 | |
99ce22d5 KH |
1927 | /* Otherwise find the correct spot by moving down */ |
1928 | } | |
1929 | /* Moving downward is simple, but must calculate from beg of line | |
1930 | to determine hpos of starting point */ | |
fe0066f5 RS |
1931 | from_byte = CHAR_TO_BYTE (from); |
1932 | if (from > BEGV && FETCH_BYTE (from_byte - 1) != '\n') | |
993b6404 | 1933 | { |
2ab90d49 | 1934 | Lisp_Object propval; |
66c75ca5 | 1935 | |
99ce22d5 KH |
1936 | XSETFASTINT (prevline, find_next_newline_no_quit (from, -1)); |
1937 | while (XFASTINT (prevline) > BEGV | |
1938 | && ((selective > 0 | |
fe0066f5 RS |
1939 | && indented_beyond_p (XFASTINT (prevline), |
1940 | CHAR_TO_BYTE (XFASTINT (prevline)), | |
76e20cb0 | 1941 | (double) selective)) /* iftc */ |
99ce22d5 KH |
1942 | /* watch out for newlines with `invisible' property */ |
1943 | || (propval = Fget_char_property (prevline, Qinvisible, | |
7ac57cb3 | 1944 | text_prop_object), |
339ee979 | 1945 | TEXT_PROP_MEANS_INVISIBLE (propval)))) |
99ce22d5 KH |
1946 | XSETFASTINT (prevline, |
1947 | find_next_newline_no_quit (XFASTINT (prevline) - 1, | |
1948 | -1)); | |
92992c7e | 1949 | pos = *compute_motion (XFASTINT (prevline), 0, |
99ce22d5 | 1950 | lmargin + (XFASTINT (prevline) == BEG |
92992c7e | 1951 | ? start_hpos : 0), |
2ab90d49 | 1952 | 0, |
097812fb | 1953 | from, |
a997a7ca KH |
1954 | /* Don't care for VPOS... */ |
1955 | 1 << (BITS_PER_SHORT - 1), | |
1956 | /* ... nor HPOS. */ | |
1957 | 1 << (BITS_PER_SHORT - 1), | |
2dd4e608 RS |
1958 | width, hscroll, |
1959 | (XFASTINT (prevline) == BEG ? -start_hpos : 0), | |
1960 | w); | |
2ab90d49 | 1961 | did_motion = 1; |
993b6404 | 1962 | } |
99ce22d5 | 1963 | else |
993b6404 | 1964 | { |
99ce22d5 KH |
1965 | pos.hpos = lmargin + (from == BEG ? start_hpos : 0); |
1966 | pos.vpos = 0; | |
a997a7ca | 1967 | pos.tab_offset = 0; |
2ab90d49 | 1968 | did_motion = 0; |
993b6404 | 1969 | } |
2ab90d49 | 1970 | return compute_motion (from, vpos, pos.hpos, did_motion, |
a997a7ca | 1971 | ZV, vtarget, - (1 << (BITS_PER_SHORT - 1)), |
2dd4e608 | 1972 | width, hscroll, |
a997a7ca | 1973 | pos.tab_offset - (from == BEG ? start_hpos : 0), |
2dd4e608 | 1974 | w); |
993b6404 JB |
1975 | } |
1976 | ||
f1ecfe9b | 1977 | DEFUN ("vertical-motion", Fvertical_motion, Svertical_motion, 1, 2, 0, |
8c1a1077 PJ |
1978 | doc: /* Move point to start of the screen line LINES lines down. |
1979 | If LINES is negative, this means moving up. | |
1980 | ||
1981 | This function is an ordinary cursor motion function | |
1982 | which calculates the new position based on how text would be displayed. | |
1983 | The new position may be the start of a line, | |
1984 | or just the start of a continuation line. | |
1985 | The function returns number of screen lines moved over; | |
1986 | that usually equals LINES, but may be closer to zero | |
1987 | if beginning or end of buffer was reached. | |
1988 | ||
1989 | The optional second argument WINDOW specifies the window to use for | |
1990 | parameters such as width, horizontal scrolling, and so on. | |
1991 | The default is to use the selected window's parameters. | |
1992 | ||
1993 | `vertical-motion' always uses the current buffer, | |
1994 | regardless of which buffer is displayed in WINDOW. | |
1995 | This is consistent with other cursor motion functions | |
1996 | and makes it possible to use `vertical-motion' in any buffer, | |
1997 | whether or not it is currently displayed in some window. */) | |
1998 | (lines, window) | |
f1ecfe9b | 1999 | Lisp_Object lines, window; |
993b6404 | 2000 | { |
8720a429 GM |
2001 | struct it it; |
2002 | struct text_pos pt; | |
8720a429 | 2003 | struct window *w; |
39210e90 GM |
2004 | Lisp_Object old_buffer; |
2005 | struct gcpro gcpro1; | |
993b6404 | 2006 | |
b7826503 | 2007 | CHECK_NUMBER (lines); |
f1ecfe9b | 2008 | if (! NILP (window)) |
b7826503 | 2009 | CHECK_WINDOW (window); |
f1ecfe9b | 2010 | else |
92992c7e | 2011 | window = selected_window; |
8720a429 | 2012 | w = XWINDOW (window); |
39210e90 GM |
2013 | |
2014 | old_buffer = Qnil; | |
2015 | GCPRO1 (old_buffer); | |
2016 | if (XBUFFER (w->buffer) != current_buffer) | |
8720a429 | 2017 | { |
39210e90 GM |
2018 | /* Set the window's buffer temporarily to the current buffer. */ |
2019 | old_buffer = w->buffer; | |
2020 | XSETBUFFER (w->buffer, current_buffer); | |
8720a429 | 2021 | } |
097812fb | 2022 | |
8720a429 GM |
2023 | SET_TEXT_POS (pt, PT, PT_BYTE); |
2024 | start_display (&it, w, pt); | |
3a46a5de | 2025 | |
e70d5579 RS |
2026 | /* Move to the start of the display line containing PT. If we don't |
2027 | do this, we start moving with IT->current_x == 0, while PT is | |
2028 | really at some x > 0. The effect is, in continuation lines, that | |
2029 | we end up with the iterator placed at where it thinks X is 0, | |
2030 | while the end position is really at some X > 0, the same X that | |
2031 | PT had. */ | |
3a46a5de GM |
2032 | move_it_by_lines (&it, 0, 0); |
2033 | ||
6f442633 | 2034 | if (XINT (lines) != 0) |
3a46a5de | 2035 | move_it_by_lines (&it, XINT (lines), 0); |
097812fb | 2036 | |
8720a429 GM |
2037 | SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it)); |
2038 | ||
39210e90 GM |
2039 | if (BUFFERP (old_buffer)) |
2040 | w->buffer = old_buffer; | |
097812fb | 2041 | |
39210e90 | 2042 | RETURN_UNGCPRO (make_number (it.vpos)); |
993b6404 | 2043 | } |
8720a429 GM |
2044 | |
2045 | ||
993b6404 | 2046 | \f |
88c6e37e | 2047 | /* File's initialization. */ |
0aa01123 | 2048 | |
dfcf069d | 2049 | void |
993b6404 JB |
2050 | syms_of_indent () |
2051 | { | |
2052 | DEFVAR_BOOL ("indent-tabs-mode", &indent_tabs_mode, | |
8c1a1077 PJ |
2053 | doc: /* *Indentation can insert tabs if this is non-nil. |
2054 | Setting this variable automatically makes it local to the current buffer. */); | |
993b6404 JB |
2055 | indent_tabs_mode = 1; |
2056 | ||
2057 | defsubr (&Scurrent_indentation); | |
2058 | defsubr (&Sindent_to); | |
2059 | defsubr (&Scurrent_column); | |
2060 | defsubr (&Smove_to_column); | |
2061 | defsubr (&Svertical_motion); | |
42918ba5 | 2062 | defsubr (&Scompute_motion); |
993b6404 | 2063 | } |