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1.22 ! nicm 1: /* $OpenBSD: format-draw.c,v 1.21 2020/11/09 09:10:10 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <stdlib.h>
22: #include <string.h>
23:
24: #include "tmux.h"
25:
26: /* Format range. */
27: struct format_range {
28: u_int index;
29: struct screen *s;
30:
31: u_int start;
32: u_int end;
33:
34: enum style_range_type type;
35: u_int argument;
36:
37: TAILQ_ENTRY(format_range) entry;
38: };
39: TAILQ_HEAD(format_ranges, format_range);
40:
41: /* Does this range match this style? */
42: static int
43: format_is_type(struct format_range *fr, struct style *sy)
44: {
45: if (fr->type != sy->range_type)
46: return (0);
47: if (fr->type == STYLE_RANGE_WINDOW &&
48: fr->argument != sy->range_argument)
49: return (0);
50: return (1);
51: }
52:
53: /* Free a range. */
54: static void
55: format_free_range(struct format_ranges *frs, struct format_range *fr)
56: {
57: TAILQ_REMOVE(frs, fr, entry);
58: free(fr);
59: }
60:
61: /* Fix range positions. */
62: static void
63: format_update_ranges(struct format_ranges *frs, struct screen *s, u_int offset,
64: u_int start, u_int width)
65: {
66: struct format_range *fr, *fr1;
67:
68: if (frs == NULL)
69: return;
70:
71: TAILQ_FOREACH_SAFE(fr, frs, entry, fr1) {
72: if (fr->s != s)
73: continue;
74:
75: if (fr->end <= start || fr->start >= start + width) {
76: format_free_range(frs, fr);
77: continue;
78: }
79:
80: if (fr->start < start)
81: fr->start = start;
82: if (fr->end > start + width)
83: fr->end = start + width;
84: if (fr->start == fr->end) {
85: format_free_range(frs, fr);
86: continue;
87: }
1.7 nicm 88:
89: fr->start -= start;
90: fr->end -= start;
1.1 nicm 91:
92: fr->start += offset;
93: fr->end += offset;
94: }
95: }
96:
97: /* Draw a part of the format. */
98: static void
99: format_draw_put(struct screen_write_ctx *octx, u_int ocx, u_int ocy,
100: struct screen *s, struct format_ranges *frs, u_int offset, u_int start,
101: u_int width)
102: {
103: /*
104: * The offset is how far from the cursor on the target screen; start
105: * and width how much to copy from the source screen.
106: */
107: screen_write_cursormove(octx, ocx + offset, ocy, 0);
108: screen_write_fast_copy(octx, s, start, 0, width, 1);
109: format_update_ranges(frs, s, offset, start, width);
110: }
111:
112: /* Draw list part of format. */
113: static void
114: format_draw_put_list(struct screen_write_ctx *octx,
115: u_int ocx, u_int ocy, u_int offset, u_int width, struct screen *list,
116: struct screen *list_left, struct screen *list_right, int focus_start,
117: int focus_end, struct format_ranges *frs)
118: {
119: u_int start, focus_centre;
120:
121: /* If there is enough space for the list, draw it entirely. */
122: if (width >= list->cx) {
123: format_draw_put(octx, ocx, ocy, list, frs, offset, 0, width);
124: return;
125: }
126:
127: /* The list needs to be trimmed. Try to keep the focus visible. */
128: focus_centre = focus_start + (focus_end - focus_start) / 2;
129: if (focus_centre < width / 2)
130: start = 0;
131: else
132: start = focus_centre - width / 2;
133: if (start + width > list->cx)
134: start = list->cx - width;
135:
136: /* Draw <> markers at either side if needed. */
137: if (start != 0 && width > list_left->cx) {
138: screen_write_cursormove(octx, ocx + offset, ocy, 0);
139: screen_write_fast_copy(octx, list_left, 0, 0, list_left->cx, 1);
140: offset += list_left->cx;
141: start += list_left->cx;
142: width -= list_left->cx;
143: }
144: if (start + width < list->cx && width > list_right->cx) {
1.15 nicm 145: screen_write_cursormove(octx, ocx + offset + width -
146: list_right->cx, ocy, 0);
1.1 nicm 147: screen_write_fast_copy(octx, list_right, 0, 0, list_right->cx,
148: 1);
149: width -= list_right->cx;
150: }
151:
152: /* Draw the list screen itself. */
153: format_draw_put(octx, ocx, ocy, list, frs, offset, start, width);
154: }
155:
156: /* Draw format with no list. */
157: static void
158: format_draw_none(struct screen_write_ctx *octx, u_int available, u_int ocx,
159: u_int ocy, struct screen *left, struct screen *centre, struct screen *right,
160: struct format_ranges *frs)
161: {
162: u_int width_left, width_centre, width_right;
163:
164: width_left = left->cx;
165: width_centre = centre->cx;
166: width_right = right->cx;
167:
168: /*
169: * Try to keep as much of the left and right as possible at the expense
170: * of the centre.
171: */
172: while (width_left + width_centre + width_right > available) {
173: if (width_centre > 0)
174: width_centre--;
175: else if (width_right > 0)
176: width_right--;
177: else
178: width_left--;
179: }
180:
181: /* Write left. */
182: format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left);
183:
184: /* Write right at available - width_right. */
185: format_draw_put(octx, ocx, ocy, right, frs,
186: available - width_right,
187: right->cx - width_right,
188: width_right);
189:
190: /*
191: * Write centre halfway between
192: * width_left
193: * and
194: * available - width_right.
195: */
196: format_draw_put(octx, ocx, ocy, centre, frs,
197: width_left
198: + ((available - width_right) - width_left) / 2
199: - width_centre / 2,
200: centre->cx / 2 - width_centre / 2,
201: width_centre);
202: }
203:
204: /* Draw format with list on the left. */
205: static void
206: format_draw_left(struct screen_write_ctx *octx, u_int available, u_int ocx,
207: u_int ocy, struct screen *left, struct screen *centre, struct screen *right,
208: struct screen *list, struct screen *list_left, struct screen *list_right,
209: struct screen *after, int focus_start, int focus_end,
210: struct format_ranges *frs)
211: {
212: u_int width_left, width_centre, width_right;
213: u_int width_list, width_after;
214: struct screen_write_ctx ctx;
215:
216: width_left = left->cx;
217: width_centre = centre->cx;
218: width_right = right->cx;
219: width_list = list->cx;
220: width_after = after->cx;
221:
222: /*
223: * Trim first the centre, then the list, then the right, then after the
224: * list, then the left.
225: */
226: while (width_left +
227: width_centre +
228: width_right +
229: width_list +
230: width_after > available) {
231: if (width_centre > 0)
232: width_centre--;
233: else if (width_list > 0)
234: width_list--;
235: else if (width_right > 0)
236: width_right--;
237: else if (width_after > 0)
238: width_after--;
239: else
240: width_left--;
241: }
242:
243: /* If there is no list left, pass off to the no list function. */
244: if (width_list == 0) {
1.18 nicm 245: screen_write_start(&ctx, left);
1.1 nicm 246: screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1);
247: screen_write_stop(&ctx);
248:
249: format_draw_none(octx, available, ocx, ocy, left, centre,
250: right, frs);
251: return;
252: }
253:
254: /* Write left at 0. */
255: format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left);
256:
257: /* Write right at available - width_right. */
258: format_draw_put(octx, ocx, ocy, right, frs,
259: available - width_right,
260: right->cx - width_right,
261: width_right);
262:
263: /* Write after at width_left + width_list. */
264: format_draw_put(octx, ocx, ocy, after, frs,
265: width_left + width_list,
266: 0,
267: width_after);
268:
269: /*
270: * Write centre halfway between
271: * width_left + width_list + width_after
272: * and
273: * available - width_right.
274: */
275: format_draw_put(octx, ocx, ocy, centre, frs,
276: (width_left + width_list + width_after)
277: + ((available - width_right)
278: - (width_left + width_list + width_after)) / 2
279: - width_centre / 2,
280: centre->cx / 2 - width_centre / 2,
281: width_centre);
282:
283: /*
284: * The list now goes from
285: * width_left
286: * to
287: * width_left + width_list.
288: * If there is no focus given, keep the left in focus.
289: */
290: if (focus_start == -1 || focus_end == -1)
291: focus_start = focus_end = 0;
292: format_draw_put_list(octx, ocx, ocy, width_left, width_list, list,
293: list_left, list_right, focus_start, focus_end, frs);
294: }
295:
296: /* Draw format with list in the centre. */
297: static void
298: format_draw_centre(struct screen_write_ctx *octx, u_int available, u_int ocx,
299: u_int ocy, struct screen *left, struct screen *centre, struct screen *right,
300: struct screen *list, struct screen *list_left, struct screen *list_right,
301: struct screen *after, int focus_start, int focus_end,
302: struct format_ranges *frs)
303: {
304: u_int width_left, width_centre, width_right;
305: u_int width_list, width_after, middle;
306: struct screen_write_ctx ctx;
307:
308: width_left = left->cx;
309: width_centre = centre->cx;
310: width_right = right->cx;
311: width_list = list->cx;
312: width_after = after->cx;
313:
314: /*
315: * Trim first the list, then after the list, then the centre, then the
316: * right, then the left.
317: */
318: while (width_left +
319: width_centre +
320: width_right +
321: width_list +
322: width_after > available) {
323: if (width_list > 0)
324: width_list--;
325: else if (width_after > 0)
326: width_after--;
327: else if (width_centre > 0)
328: width_centre--;
329: else if (width_right > 0)
330: width_right--;
331: else
332: width_left--;
333: }
334:
335: /* If there is no list left, pass off to the no list function. */
336: if (width_list == 0) {
1.18 nicm 337: screen_write_start(&ctx, centre);
1.1 nicm 338: screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1);
339: screen_write_stop(&ctx);
340:
341: format_draw_none(octx, available, ocx, ocy, left, centre,
342: right, frs);
343: return;
344: }
345:
346: /* Write left at 0. */
347: format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left);
348:
349: /* Write right at available - width_right. */
350: format_draw_put(octx, ocx, ocy, right, frs,
351: available - width_right,
352: right->cx - width_right,
353: width_right);
354:
355: /*
356: * All three centre sections are offset from the middle of the
357: * available space.
358: */
359: middle = (width_left + ((available - width_right) - width_left) / 2);
360:
361: /*
362: * Write centre at
363: * middle - width_list / 2 - width_centre.
364: */
365: format_draw_put(octx, ocx, ocy, centre, frs,
366: middle - width_list / 2 - width_centre,
367: 0,
368: width_centre);
369:
370: /*
371: * Write after at
1.9 nicm 372: * middle - width_list / 2 + width_list
1.1 nicm 373: */
374: format_draw_put(octx, ocx, ocy, after, frs,
1.9 nicm 375: middle - width_list / 2 + width_list,
1.1 nicm 376: 0,
377: width_after);
378:
379: /*
380: * The list now goes from
381: * middle - width_list / 2
382: * to
383: * middle + width_list / 2
384: * If there is no focus given, keep the centre in focus.
385: */
386: if (focus_start == -1 || focus_end == -1)
387: focus_start = focus_end = list->cx / 2;
388: format_draw_put_list(octx, ocx, ocy, middle - width_list / 2,
389: width_list, list, list_left, list_right, focus_start, focus_end,
390: frs);
391: }
392:
393: /* Draw format with list on the right. */
394: static void
395: format_draw_right(struct screen_write_ctx *octx, u_int available, u_int ocx,
396: u_int ocy, struct screen *left, struct screen *centre, struct screen *right,
397: struct screen *list, struct screen *list_left, struct screen *list_right,
398: struct screen *after, int focus_start, int focus_end,
399: struct format_ranges *frs)
400: {
401: u_int width_left, width_centre, width_right;
402: u_int width_list, width_after;
403: struct screen_write_ctx ctx;
404:
405: width_left = left->cx;
406: width_centre = centre->cx;
407: width_right = right->cx;
408: width_list = list->cx;
409: width_after = after->cx;
410:
411: /*
412: * Trim first the centre, then the list, then the right, then
413: * after the list, then the left.
414: */
415: while (width_left +
416: width_centre +
417: width_right +
418: width_list +
419: width_after > available) {
420: if (width_centre > 0)
421: width_centre--;
422: else if (width_list > 0)
423: width_list--;
424: else if (width_right > 0)
425: width_right--;
426: else if (width_after > 0)
427: width_after--;
428: else
429: width_left--;
430: }
431:
432: /* If there is no list left, pass off to the no list function. */
433: if (width_list == 0) {
1.18 nicm 434: screen_write_start(&ctx, right);
1.1 nicm 435: screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1);
436: screen_write_stop(&ctx);
437:
438: format_draw_none(octx, available, ocx, ocy, left, centre,
439: right, frs);
440: return;
441: }
442:
443: /* Write left at 0. */
444: format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left);
445:
446: /* Write after at available - width_after. */
447: format_draw_put(octx, ocx, ocy, after, frs,
448: available - width_after,
449: after->cx - width_after,
450: width_after);
451:
452: /*
453: * Write right at
454: * available - width_right - width_list - width_after.
455: */
456: format_draw_put(octx, ocx, ocy, right, frs,
457: available - width_right - width_list - width_after,
458: 0,
459: width_right);
460:
461: /*
462: * Write centre halfway between
463: * width_left
464: * and
465: * available - width_right - width_list - width_after.
466: */
467: format_draw_put(octx, ocx, ocy, centre, frs,
468: width_left
469: + ((available - width_right - width_list - width_after)
470: - width_left) / 2
471: - width_centre / 2,
472: centre->cx / 2 - width_centre / 2,
473: width_centre);
474:
475: /*
476: * The list now goes from
477: * available - width_list - width_after
478: * to
479: * available - width_after
480: * If there is no focus given, keep the right in focus.
481: */
482: if (focus_start == -1 || focus_end == -1)
483: focus_start = focus_end = 0;
484: format_draw_put_list(octx, ocx, ocy, available - width_list -
485: width_after, width_list, list, list_left, list_right, focus_start,
486: focus_end, frs);
487: }
488:
1.21 nicm 489: /* Draw multiple characters. */
490: static void
491: format_draw_many(struct screen_write_ctx *ctx, struct style *sy, char ch,
492: u_int n)
493: {
494: u_int i;
495:
496: utf8_set(&sy->gc.data, ch);
497: for (i = 0; i < n; i++)
498: screen_write_cell(ctx, &sy->gc);
499: }
500:
1.1 nicm 501: /* Draw a format to a screen. */
502: void
503: format_draw(struct screen_write_ctx *octx, const struct grid_cell *base,
504: u_int available, const char *expanded, struct style_ranges *srs)
505: {
506: enum { LEFT,
507: CENTRE,
508: RIGHT,
509: LIST,
510: LIST_LEFT,
511: LIST_RIGHT,
512: AFTER,
513: TOTAL } current = LEFT, last = LEFT;
514: const char *names[] = { "LEFT",
515: "CENTRE",
516: "RIGHT",
517: "LIST",
518: "LIST_LEFT",
519: "LIST_RIGHT",
520: "AFTER" };
521: size_t size = strlen(expanded);
522: struct screen *os = octx->s, s[TOTAL];
523: struct screen_write_ctx ctx[TOTAL];
1.21 nicm 524: u_int ocx = os->cx, ocy = os->cy, n, i, width[TOTAL];
1.1 nicm 525: u_int map[] = { LEFT, LEFT, CENTRE, RIGHT };
526: int focus_start = -1, focus_end = -1;
1.21 nicm 527: int list_state = -1, fill = -1, even;
1.1 nicm 528: enum style_align list_align = STYLE_ALIGN_DEFAULT;
1.13 nicm 529: struct grid_cell gc, current_default;
530: struct style sy, saved_sy;
1.1 nicm 531: struct utf8_data *ud = &sy.gc.data;
532: const char *cp, *end;
533: enum utf8_state more;
534: char *tmp;
535: struct format_range *fr = NULL, *fr1;
536: struct format_ranges frs;
537: struct style_range *sr;
538:
1.13 nicm 539: memcpy(¤t_default, base, sizeof current_default);
540: style_set(&sy, ¤t_default);
1.1 nicm 541: TAILQ_INIT(&frs);
1.3 nicm 542: log_debug("%s: %s", __func__, expanded);
1.1 nicm 543:
544: /*
545: * We build three screens for left, right, centre alignment, one for
546: * the list, one for anything after the list and two for the list left
547: * and right markers.
548: */
549: for (i = 0; i < TOTAL; i++) {
550: screen_init(&s[i], size, 1, 0);
1.18 nicm 551: screen_write_start(&ctx[i], &s[i]);
1.13 nicm 552: screen_write_clearendofline(&ctx[i], current_default.bg);
1.1 nicm 553: width[i] = 0;
554: }
555:
556: /*
557: * Walk the string and add to the corresponding screens,
558: * parsing styles as we go.
559: */
560: cp = expanded;
561: while (*cp != '\0') {
1.21 nicm 562: /* Handle sequences of #. */
563: if (cp[0] == '#' && cp[1] != '[' && cp[1] != '\0') {
564: for (n = 1; cp[n] == '#'; n++)
565: /* nothing */;
1.22 ! nicm 566: even = ((n % 2) == 0);
1.21 nicm 567: if (cp[n] != '[') {
1.22 ! nicm 568: cp += n;
! 569: if (even)
! 570: n = (n / 2);
! 571: else
! 572: n = (n / 2) + 1;
1.21 nicm 573: width[current] += n;
574: format_draw_many(&ctx[current], &sy, '#', n);
575: continue;
576: }
577: if (even)
578: cp += (n + 1);
579: else
580: cp += (n - 1);
581: if (sy.ignore)
582: continue;
583: format_draw_many(&ctx[current], &sy, '#', n / 2);
584: width[current] += (n / 2);
585: if (even) {
586: utf8_set(ud, '[');
587: screen_write_cell(&ctx[current], &sy.gc);
588: width[current]++;
589: }
590: continue;
591: }
592:
593: /* Is this not a style? */
1.19 nicm 594: if (cp[0] != '#' || cp[1] != '[' || sy.ignore) {
1.1 nicm 595: /* See if this is a UTF-8 character. */
596: if ((more = utf8_open(ud, *cp)) == UTF8_MORE) {
597: while (*++cp != '\0' && more == UTF8_MORE)
598: more = utf8_append(ud, *cp);
599: if (more != UTF8_DONE)
600: cp -= ud->have;
601: }
602:
603: /* Not a UTF-8 character - ASCII or not valid. */
604: if (more != UTF8_DONE) {
605: if (*cp < 0x20 || *cp > 0x7e) {
606: /* Ignore nonprintable characters. */
607: cp++;
608: continue;
609: }
610: utf8_set(ud, *cp);
611: cp++;
612: }
613:
1.12 nicm 614: /* Draw the cell to the current screen. */
1.1 nicm 615: screen_write_cell(&ctx[current], &sy.gc);
616: width[current] += ud->width;
617: continue;
618: }
619:
620: /* This is a style. Work out where the end is and parse it. */
621: end = format_skip(cp + 2, "]");
1.3 nicm 622: if (end == NULL) {
1.6 nicm 623: log_debug("%s: no terminating ] at '%s'", __func__,
624: cp + 2);
1.5 nicm 625: TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1)
626: format_free_range(&frs, fr);
627: goto out;
1.3 nicm 628: }
1.1 nicm 629: tmp = xstrndup(cp + 2, end - (cp + 2));
1.13 nicm 630: style_copy(&saved_sy, &sy);
631: if (style_parse(&sy, ¤t_default, tmp) != 0) {
1.6 nicm 632: log_debug("%s: invalid style '%s'", __func__, tmp);
1.1 nicm 633: free(tmp);
1.4 nicm 634: cp = end + 1;
635: continue;
1.1 nicm 636: }
1.6 nicm 637: log_debug("%s: style '%s' -> '%s'", __func__, tmp,
638: style_tostring(&sy));
1.1 nicm 639: free(tmp);
640:
1.11 nicm 641: /* If this style has a fill colour, store it for later. */
642: if (sy.fill != 8)
643: fill = sy.fill;
1.13 nicm 644:
645: /* If this style pushed or popped the default, update it. */
646: if (sy.default_type == STYLE_DEFAULT_PUSH) {
1.20 nicm 647: memcpy(¤t_default, &saved_sy.gc,
648: sizeof current_default);
1.13 nicm 649: sy.default_type = STYLE_DEFAULT_BASE;
650: } else if (sy.default_type == STYLE_DEFAULT_POP) {
651: memcpy(¤t_default, base, sizeof current_default);
652: sy.default_type = STYLE_DEFAULT_BASE;
653: }
1.11 nicm 654:
1.1 nicm 655: /* Check the list state. */
656: switch (sy.list) {
657: case STYLE_LIST_ON:
658: /*
659: * Entering the list, exiting a marker, or exiting the
660: * focus.
661: */
662: if (list_state != 0) {
663: if (fr != NULL) { /* abort any region */
664: free(fr);
665: fr = NULL;
666: }
667: list_state = 0;
668: list_align = sy.align;
669: }
670:
671: /* End the focus if started. */
672: if (focus_start != -1 && focus_end == -1)
673: focus_end = s[LIST].cx;
674:
675: current = LIST;
676: break;
677: case STYLE_LIST_FOCUS:
678: /* Entering the focus. */
679: if (list_state != 0) /* not inside the list */
680: break;
681: if (focus_start == -1) /* focus already started */
682: focus_start = s[LIST].cx;
683: break;
684: case STYLE_LIST_OFF:
685: /* Exiting or outside the list. */
686: if (list_state == 0) {
687: if (fr != NULL) { /* abort any region */
688: free(fr);
689: fr = NULL;
690: }
691: if (focus_start != -1 && focus_end == -1)
692: focus_end = s[LIST].cx;
693:
694: map[list_align] = AFTER;
695: if (list_align == STYLE_ALIGN_LEFT)
696: map[STYLE_ALIGN_DEFAULT] = AFTER;
697: list_state = 1;
698: }
699: current = map[sy.align];
700: break;
701: case STYLE_LIST_LEFT_MARKER:
702: /* Entering left marker. */
703: if (list_state != 0) /* not inside the list */
704: break;
705: if (s[LIST_LEFT].cx != 0) /* already have marker */
706: break;
707: if (fr != NULL) { /* abort any region */
708: free(fr);
709: fr = NULL;
710: }
711: if (focus_start != -1 && focus_end == -1)
712: focus_start = focus_end = -1;
713: current = LIST_LEFT;
714: break;
715: case STYLE_LIST_RIGHT_MARKER:
716: /* Entering right marker. */
717: if (list_state != 0) /* not inside the list */
718: break;
719: if (s[LIST_RIGHT].cx != 0) /* already have marker */
720: break;
721: if (fr != NULL) { /* abort any region */
722: free(fr);
723: fr = NULL;
724: }
725: if (focus_start != -1 && focus_end == -1)
726: focus_start = focus_end = -1;
727: current = LIST_RIGHT;
728: break;
729: }
730: if (current != last) {
731: log_debug("%s: change %s -> %s", __func__,
732: names[last], names[current]);
733: last = current;
734: }
735:
736: /*
737: * Check if the range style has changed and if so end the
738: * current range and start a new one if needed.
739: */
740: if (srs != NULL) {
741: if (fr != NULL && !format_is_type(fr, &sy)) {
742: if (s[current].cx != fr->start) {
743: fr->end = s[current].cx + 1;
744: TAILQ_INSERT_TAIL(&frs, fr, entry);
745: } else
746: free(fr);
747: fr = NULL;
748: }
749: if (fr == NULL && sy.range_type != STYLE_RANGE_NONE) {
750: fr = xcalloc(1, sizeof *fr);
751: fr->index = current;
752:
753: fr->s = &s[current];
754: fr->start = s[current].cx;
755:
756: fr->type = sy.range_type;
757: fr->argument = sy.range_argument;
758: }
759: }
760:
761: cp = end + 1;
762: }
763: free(fr);
764:
1.2 nicm 765: for (i = 0; i < TOTAL; i++) {
766: screen_write_stop(&ctx[i]);
1.1 nicm 767: log_debug("%s: width %s is %u", __func__, names[i], width[i]);
1.2 nicm 768: }
1.1 nicm 769: if (focus_start != -1 && focus_end != -1)
1.6 nicm 770: log_debug("%s: focus %d-%d", __func__, focus_start, focus_end);
1.1 nicm 771: TAILQ_FOREACH(fr, &frs, entry) {
772: log_debug("%s: range %d|%u is %s %u-%u", __func__, fr->type,
773: fr->argument, names[fr->index], fr->start, fr->end);
1.11 nicm 774: }
775:
776: /* Clear the available area. */
777: if (fill != -1) {
778: memcpy(&gc, &grid_default_cell, sizeof gc);
779: gc.bg = fill;
780: for (i = 0; i < available; i++)
781: screen_write_putc(octx, &gc, ' ');
1.1 nicm 782: }
783:
784: /*
785: * Draw the screens. How they are arranged depends on where the list
1.17 nicm 786: * appears.
1.1 nicm 787: */
788: switch (list_align) {
789: case STYLE_ALIGN_DEFAULT:
790: /* No list. */
791: format_draw_none(octx, available, ocx, ocy, &s[LEFT],
792: &s[CENTRE], &s[RIGHT], &frs);
793: break;
794: case STYLE_ALIGN_LEFT:
795: /* List is part of the left. */
796: format_draw_left(octx, available, ocx, ocy, &s[LEFT],
797: &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT],
798: &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs);
799: break;
800: case STYLE_ALIGN_CENTRE:
801: /* List is part of the centre. */
802: format_draw_centre(octx, available, ocx, ocy, &s[LEFT],
803: &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT],
804: &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs);
805: break;
806: case STYLE_ALIGN_RIGHT:
807: /* List is part of the right. */
808: format_draw_right(octx, available, ocx, ocy, &s[LEFT],
809: &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT],
810: &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs);
811: break;
812: }
813:
814: /* Create ranges to return. */
815: TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) {
816: sr = xcalloc(1, sizeof *sr);
817: sr->type = fr->type;
818: sr->argument = fr->argument;
819: sr->start = fr->start;
820: sr->end = fr->end;
821: TAILQ_INSERT_TAIL(srs, sr, entry);
822:
823: log_debug("%s: range %d|%u at %u-%u", __func__, sr->type,
824: sr->argument, sr->start, sr->end);
825:
826: format_free_range(&frs, fr);
827: }
1.2 nicm 828:
1.5 nicm 829: out:
1.2 nicm 830: /* Free the screens. */
831: for (i = 0; i < TOTAL; i++)
832: screen_free(&s[i]);
1.1 nicm 833:
834: /* Restore the original cursor position. */
835: screen_write_cursormove(octx, ocx, ocy, 0);
836: }
837:
838: /* Get width, taking #[] into account. */
839: u_int
840: format_width(const char *expanded)
841: {
842: const char *cp, *end;
1.21 nicm 843: u_int n, width = 0;
1.1 nicm 844: struct utf8_data ud;
845: enum utf8_state more;
846:
847: cp = expanded;
848: while (*cp != '\0') {
1.21 nicm 849: if (*cp == '#') {
850: for (n = 1; cp[n] == '#'; n++)
851: /* nothing */;
852: if (cp[n] != '[') {
853: width += n;
854: cp += n;
855: continue;
856: }
857: width += (n / 2); /* one for each ## */
858:
859: if ((n % 2) == 0) {
860: /*
861: * An even number of #s means that all #s are
862: * escaped, so not a style.
863: */
864: width++; /* one for the [ */
865: cp += (n + 1);
866: continue;
867: }
868: cp += (n - 1); /* point to the [ */
869:
1.1 nicm 870: end = format_skip(cp + 2, "]");
871: if (end == NULL)
1.16 nicm 872: return (0);
1.1 nicm 873: cp = end + 1;
874: } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) {
875: while (*++cp != '\0' && more == UTF8_MORE)
876: more = utf8_append(&ud, *cp);
877: if (more == UTF8_DONE)
878: width += ud.width;
879: else
880: cp -= ud.have;
881: } else if (*cp > 0x1f && *cp < 0x7f) {
882: width++;
883: cp++;
1.10 nicm 884: } else
885: cp++;
1.1 nicm 886: }
887: return (width);
888: }
889:
1.21 nicm 890: /*
891: * Trim on the left, taking #[] into account. Note, we copy the whole set of
892: * unescaped #s, but only add their escaped size to width. This is because the
893: * format_draw function will actually do the escaping when it runs
894: */
1.1 nicm 895: char *
896: format_trim_left(const char *expanded, u_int limit)
897: {
898: char *copy, *out;
899: const char *cp = expanded, *end;
1.21 nicm 900: u_int even, n, width = 0;
1.1 nicm 901: struct utf8_data ud;
902: enum utf8_state more;
903:
1.21 nicm 904: out = copy = xcalloc(1, strlen(expanded) + 1);
1.1 nicm 905: while (*cp != '\0') {
1.21 nicm 906: if (width >= limit)
907: break;
908: if (*cp == '#') {
909: for (end = cp + 1; *end == '#'; end++)
910: /* nothing */;
911: n = end - cp;
912: if (*end != '[') {
913: if (n > limit - width)
914: n = limit - width;
915: memcpy(out, cp, n);
916: out += n;
917: width += n;
918: cp = end;
919: continue;
920: }
921: even = ((n % 2) == 0);
922:
923: n /= 2;
924: if (n > limit - width)
925: n = limit - width;
926: width += n;
927: n *= 2;
928: memcpy(out, cp, n);
929: out += n;
930:
931: if (even) {
932: if (width + 1 <= limit) {
933: *out++ = '[';
934: width++;
935: }
936: cp = end + 1;
937: continue;
938: }
939: cp = end - 1;
940:
1.1 nicm 941: end = format_skip(cp + 2, "]");
942: if (end == NULL)
943: break;
944: memcpy(out, cp, end + 1 - cp);
945: out += (end + 1 - cp);
946: cp = end + 1;
947: } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) {
948: while (*++cp != '\0' && more == UTF8_MORE)
949: more = utf8_append(&ud, *cp);
950: if (more == UTF8_DONE) {
951: if (width + ud.width <= limit) {
952: memcpy(out, ud.data, ud.size);
953: out += ud.size;
954: }
955: width += ud.width;
1.14 nicm 956: } else {
1.1 nicm 957: cp -= ud.have;
1.14 nicm 958: cp++;
959: }
1.1 nicm 960: } else if (*cp > 0x1f && *cp < 0x7f) {
961: if (width + 1 <= limit)
962: *out++ = *cp;
963: width++;
964: cp++;
1.8 nicm 965: } else
966: cp++;
1.1 nicm 967: }
968: *out = '\0';
969: return (copy);
970: }
971:
972: /* Trim on the right, taking #[] into account. */
973: char *
974: format_trim_right(const char *expanded, u_int limit)
975: {
976: char *copy, *out;
977: const char *cp = expanded, *end;
1.21 nicm 978: u_int width = 0, total_width, skip, old_n, even, n;
1.1 nicm 979: struct utf8_data ud;
980: enum utf8_state more;
981:
982: total_width = format_width(expanded);
983: if (total_width <= limit)
984: return (xstrdup(expanded));
985: skip = total_width - limit;
986:
1.21 nicm 987: out = copy = xcalloc(1, strlen(expanded) + 1);
1.1 nicm 988: while (*cp != '\0') {
1.21 nicm 989: if (*cp == '#') {
990: for (end = cp + 1; *end == '#'; end++)
991: /* nothing */;
992: old_n = n = end - cp;
993: if (*end != '[') {
994: if (width <= skip) {
995: if (skip - width >= n)
996: n = 0;
997: else
998: n -= (skip - width);
999: }
1000: if (n != 0) {
1001: memcpy(out, cp, n);
1002: out += n;
1003: }
1004:
1005: /*
1006: * The width always increases by the full
1007: * amount even if we can't copy anything yet.
1008: */
1009: width += old_n;
1010: cp = end;
1011: continue;
1012: }
1013: even = ((n % 2) == 0);
1014:
1015: n /= 2;
1016: if (width <= skip) {
1017: if (skip - width >= n)
1018: n = 0;
1019: else
1020: n -= (skip - width);
1021: }
1022: if (n != 0) {
1023: /*
1024: * Copy the full amount because it hasn't been
1025: * escaped yet.
1026: */
1027: memcpy(out, cp, old_n);
1028: out += old_n;
1029: }
1030: cp += old_n;
1031: width += (old_n / 2) - even;
1032:
1033: if (even) {
1034: if (width > skip)
1035: *out++ = '[';
1036: width++;
1037: continue;
1038: }
1039: cp = end - 1;
1040:
1.1 nicm 1041: end = format_skip(cp + 2, "]");
1.21 nicm 1042: if (end == NULL) {
1.1 nicm 1043: break;
1.21 nicm 1044: }
1.1 nicm 1045: memcpy(out, cp, end + 1 - cp);
1046: out += (end + 1 - cp);
1047: cp = end + 1;
1048: } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) {
1049: while (*++cp != '\0' && more == UTF8_MORE)
1050: more = utf8_append(&ud, *cp);
1051: if (more == UTF8_DONE) {
1052: if (width >= skip) {
1053: memcpy(out, ud.data, ud.size);
1054: out += ud.size;
1055: }
1056: width += ud.width;
1.14 nicm 1057: } else {
1.1 nicm 1058: cp -= ud.have;
1.14 nicm 1059: cp++;
1060: }
1.1 nicm 1061: } else if (*cp > 0x1f && *cp < 0x7f) {
1062: if (width >= skip)
1063: *out++ = *cp;
1064: width++;
1065: cp++;
1.8 nicm 1066: } else
1067: cp++;
1.1 nicm 1068: }
1069: *out = '\0';
1070: return (copy);
1071: }