source: fmtext.c @ eb8d9c1

release-1.8release-1.9
Last change on this file since eb8d9c1 was 1137802, checked in by David Benjamin <davidben@mit.edu>, 10 years ago
Kill owl_fmtext_set_char This function is a little disturbing and, thankfully, no longer used by anyone.
  • Property mode set to 100644
File size: 27.3 KB
Line 
1#include "owl.h"
2#include <stdlib.h>
3#include <string.h>
4
5/* initialize an fmtext with no data */
6void owl_fmtext_init_null(owl_fmtext *f)
7{
8  f->buff = g_string_new("");
9  f->default_attrs = OWL_FMTEXT_ATTR_NONE;
10  f->default_fgcolor = OWL_COLOR_DEFAULT;
11  f->default_bgcolor = OWL_COLOR_DEFAULT;
12}
13
14/* Clear the data from an fmtext, but don't deallocate memory. This
15   fmtext can then be appended to again. */
16void owl_fmtext_clear(owl_fmtext *f)
17{
18  g_string_truncate(f->buff, 0);
19  f->default_attrs = OWL_FMTEXT_ATTR_NONE;
20  f->default_fgcolor = OWL_COLOR_DEFAULT;
21  f->default_bgcolor = OWL_COLOR_DEFAULT;
22}
23
24int owl_fmtext_is_format_char(gunichar c)
25{
26  if ((c & ~OWL_FMTEXT_UC_ATTR_MASK) == OWL_FMTEXT_UC_ATTR) return 1;
27  if ((c & ~(OWL_FMTEXT_UC_ALLCOLOR_MASK)) == OWL_FMTEXT_UC_COLOR_BASE) return 1;
28  return 0;
29}
30/* append text to the end of 'f' with attribute 'attr' and color
31 * 'color'
32 */
33void owl_fmtext_append_attr(owl_fmtext *f, const char *text, char attr, short fgcolor, short bgcolor)
34{
35  int a = 0, fg = 0, bg = 0;
36 
37  if (attr != OWL_FMTEXT_ATTR_NONE) a=1;
38  if (fgcolor != OWL_COLOR_DEFAULT) fg=1;
39  if (bgcolor != OWL_COLOR_DEFAULT) bg=1;
40
41  /* Set attributes */
42  if (a)
43    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_ATTR | attr);
44  if (fg)
45    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_FGCOLOR | fgcolor);
46  if (bg)
47    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_BGCOLOR | bgcolor);
48
49  g_string_append(f->buff, text);
50
51  /* Reset attributes */
52  if (bg) g_string_append(f->buff, OWL_FMTEXT_UTF8_BGDEFAULT);
53  if (fg) g_string_append(f->buff, OWL_FMTEXT_UTF8_FGDEFAULT);
54  if (a)  g_string_append(f->buff, OWL_FMTEXT_UTF8_ATTR_NONE);
55}
56
57/* Append normal, uncolored text 'text' to 'f' */
58void owl_fmtext_append_normal(owl_fmtext *f, const char *text)
59{
60  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
61}
62
63/* Append normal, uncolored text specified by format string to 'f' */
64void owl_fmtext_appendf_normal(owl_fmtext *f, const char *fmt, ...)
65{
66  va_list ap;
67  char *buff;
68
69  va_start(ap, fmt);
70  buff = g_strdup_vprintf(fmt, ap);
71  va_end(ap);
72  if (!buff)
73    return;
74  owl_fmtext_append_attr(f, buff, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
75  g_free(buff);
76}
77
78/* Append normal text 'text' to 'f' with color 'color' */
79void owl_fmtext_append_normal_color(owl_fmtext *f, const char *text, int fgcolor, int bgcolor)
80{
81  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, fgcolor, bgcolor);
82}
83
84/* Append bold text 'text' to 'f' */
85void owl_fmtext_append_bold(owl_fmtext *f, const char *text)
86{
87  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
88}
89
90/* Append reverse video text 'text' to 'f' */
91void owl_fmtext_append_reverse(owl_fmtext *f, const char *text)
92{
93  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
94}
95
96/* Append reversed and bold, uncolored text 'text' to 'f' */
97void owl_fmtext_append_reversebold(owl_fmtext *f, const char *text)
98{
99  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE | OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
100}
101
102/* Add the attribute 'attr' to the default atts for the text in 'f' */
103void owl_fmtext_addattr(owl_fmtext *f, char attr)
104{
105  /* add the attribute to all text */
106  f->default_attrs |= attr;
107}
108
109/* Set the default foreground color for this fmtext to 'color'.
110 * Only affects text that is colored default.
111 */
112void owl_fmtext_colorize(owl_fmtext *f, int color)
113{
114  f->default_fgcolor = color;
115}
116
117/* Set the default foreground color for this fmtext to 'color'.
118 * Only affects text that is colored default.
119 */
120void owl_fmtext_colorizebg(owl_fmtext *f, int color)
121{
122  f->default_bgcolor = color;
123}
124
125/* Internal function. Parse attrbute character. */
126static void _owl_fmtext_update_attributes(gunichar c, char *attr, short *fgcolor, short *bgcolor)
127{
128  if ((c & OWL_FMTEXT_UC_ATTR) == OWL_FMTEXT_UC_ATTR) {
129    *attr = c & OWL_FMTEXT_UC_ATTR_MASK;
130  }
131  else if ((c & OWL_FMTEXT_UC_COLOR_BASE) == OWL_FMTEXT_UC_COLOR_BASE) {
132    if ((c & OWL_FMTEXT_UC_BGCOLOR) == OWL_FMTEXT_UC_BGCOLOR) {
133      *bgcolor = (c == OWL_FMTEXT_UC_BGDEFAULT
134                  ? OWL_COLOR_DEFAULT
135                  : c & OWL_FMTEXT_UC_COLOR_MASK);
136    }
137    else if ((c & OWL_FMTEXT_UC_FGCOLOR) == OWL_FMTEXT_UC_FGCOLOR) {
138      *fgcolor = (c == OWL_FMTEXT_UC_FGDEFAULT
139                  ? OWL_COLOR_DEFAULT
140                  : c & OWL_FMTEXT_UC_COLOR_MASK);
141    }
142  }
143}
144
145/* Internal function. Scan for attribute characters. */
146static void _owl_fmtext_scan_attributes(const owl_fmtext *f, int start, char *attr, short *fgcolor, short *bgcolor)
147{
148  const char *p;
149  p = strchr(f->buff->str, OWL_FMTEXT_UC_STARTBYTE_UTF8);
150  while (p && p < f->buff->str + start) {
151    _owl_fmtext_update_attributes(g_utf8_get_char(p), attr, fgcolor, bgcolor);
152    p = strchr(p+1, OWL_FMTEXT_UC_STARTBYTE_UTF8);
153  }
154} 
155
156/* Internal function.  Append text from 'in' between index 'start'
157 * inclusive and 'stop' exclusive, to the end of 'f'. This function
158 * works with bytes.
159 */
160static void _owl_fmtext_append_fmtext(owl_fmtext *f, const owl_fmtext *in, int start, int stop)
161{
162  int a = 0, fg = 0, bg = 0;
163  char attr = 0;
164  short fgcolor = OWL_COLOR_DEFAULT;
165  short bgcolor = OWL_COLOR_DEFAULT;
166
167  _owl_fmtext_scan_attributes(in, start, &attr, &fgcolor, &bgcolor);
168  if (attr != OWL_FMTEXT_ATTR_NONE) a=1;
169  if (fgcolor != OWL_COLOR_DEFAULT) fg=1;
170  if (bgcolor != OWL_COLOR_DEFAULT) bg=1;
171
172  if (a)
173    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_ATTR | attr);
174  if (fg)
175    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_FGCOLOR | fgcolor);
176  if (bg)
177    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_BGCOLOR | bgcolor);
178
179  g_string_append_len(f->buff, in->buff->str+start, stop-start);
180
181  /* Reset attributes */
182  g_string_append(f->buff, OWL_FMTEXT_UTF8_BGDEFAULT);
183  g_string_append(f->buff, OWL_FMTEXT_UTF8_FGDEFAULT);
184  g_string_append(f->buff, OWL_FMTEXT_UTF8_ATTR_NONE);
185}
186
187/* append fmtext 'in' to 'f' */
188void owl_fmtext_append_fmtext(owl_fmtext *f, const owl_fmtext *in)
189{
190  _owl_fmtext_append_fmtext(f, in, 0, in->buff->len);
191
192}
193
194/* Append 'nspaces' number of spaces to the end of 'f' */
195void owl_fmtext_append_spaces(owl_fmtext *f, int nspaces)
196{
197  int i;
198  for (i=0; i<nspaces; i++) {
199    owl_fmtext_append_normal(f, " ");
200  }
201}
202
203/* Return a plain version of the fmtext.  Caller is responsible for
204 * freeing the return
205 */
206char *owl_fmtext_print_plain(const owl_fmtext *f)
207{
208  return owl_strip_format_chars(f->buff->str);
209}
210
211static void _owl_fmtext_wattrset(WINDOW *w, int attrs)
212{
213  wattrset(w, A_NORMAL);
214  if (attrs & OWL_FMTEXT_ATTR_BOLD) wattron(w, A_BOLD);
215  if (attrs & OWL_FMTEXT_ATTR_REVERSE) wattron(w, A_REVERSE);
216  if (attrs & OWL_FMTEXT_ATTR_UNDERLINE) wattron(w, A_UNDERLINE);
217}
218
219static void _owl_fmtext_update_colorpair(short fg, short bg, short *pair)
220{
221  if (owl_global_get_hascolors(&g)) {
222    *pair = owl_fmtext_get_colorpair(fg, bg);
223  }
224}
225
226static void _owl_fmtext_wcolor_set(WINDOW *w, short pair)
227{
228  if (owl_global_get_hascolors(&g)) {
229      wcolor_set(w,pair,NULL);
230      wbkgdset(w, COLOR_PAIR(pair));
231  }
232}
233
234/* add the formatted text to the curses window 'w'.  The window 'w'
235 * must already be initiatlized with curses
236 */
237static void _owl_fmtext_curs_waddstr(const owl_fmtext *f, WINDOW *w, int do_search)
238{
239  /* char *tmpbuff; */
240  /* int position, trans1, trans2, trans3, len, lastsame; */
241  char *s, *p;
242  char attr;
243  short fg, bg, pair = 0;
244 
245  if (w==NULL) {
246    owl_function_debugmsg("Hit a null window in owl_fmtext_curs_waddstr.");
247    return;
248  }
249
250  s = f->buff->str;
251  /* Set default attributes. */
252  attr = f->default_attrs;
253  fg = f->default_fgcolor;
254  bg = f->default_bgcolor;
255  _owl_fmtext_wattrset(w, attr);
256  _owl_fmtext_update_colorpair(fg, bg, &pair);
257  _owl_fmtext_wcolor_set(w, pair);
258
259  /* Find next possible format character. */
260  p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
261  while(p) {
262    if (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
263      /* Deal with all text from last insert to here. */
264      char tmp;
265   
266      tmp = p[0];
267      p[0] = '\0';
268      if (do_search && owl_global_is_search_active(&g)) {
269        /* Search is active, so highlight search results. */
270        int start, end;
271        while (owl_regex_compare(owl_global_get_search_re(&g), s, &start, &end) == 0) {
272          /* Prevent an infinite loop matching the empty string. */
273          if (end == 0)
274            break;
275
276          /* Found search string, highlight it. */
277
278          waddnstr(w, s, start);
279
280          _owl_fmtext_wattrset(w, attr ^ OWL_FMTEXT_ATTR_REVERSE);
281          _owl_fmtext_wcolor_set(w, pair);
282         
283          waddnstr(w, s + start, end - start);
284
285          _owl_fmtext_wattrset(w, attr);
286          _owl_fmtext_wcolor_set(w, pair);
287
288          s += end;
289        }
290      }
291      /* Deal with remaining part of string. */
292      waddstr(w, s);
293      p[0] = tmp;
294
295      /* Deal with new attributes. Initialize to defaults, then
296         process all consecutive formatting characters. */
297      attr = f->default_attrs;
298      fg = f->default_fgcolor;
299      bg = f->default_bgcolor;
300      while (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
301        _owl_fmtext_update_attributes(g_utf8_get_char(p), &attr, &fg, &bg);
302        p = g_utf8_next_char(p);
303      }
304      _owl_fmtext_wattrset(w, attr | f->default_attrs);
305      if (fg == OWL_COLOR_DEFAULT) fg = f->default_fgcolor;
306      if (bg == OWL_COLOR_DEFAULT) bg = f->default_bgcolor;
307      _owl_fmtext_update_colorpair(fg, bg, &pair);
308      _owl_fmtext_wcolor_set(w, pair);
309
310      /* Advance to next non-formatting character. */
311      s = p;
312      p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
313    }
314    else {
315      p = strchr(p+1, OWL_FMTEXT_UC_STARTBYTE_UTF8);
316    }
317  }
318  if (s) {
319    waddstr(w, s);
320  }
321  wbkgdset(w, 0);
322}
323
324void owl_fmtext_curs_waddstr(const owl_fmtext *f, WINDOW *w)
325{
326  _owl_fmtext_curs_waddstr(f, w, 1);
327}
328
329void owl_fmtext_curs_waddstr_without_search(const owl_fmtext *f, WINDOW *w)
330{
331  _owl_fmtext_curs_waddstr(f, w, 0);
332}
333
334/* Expands tabs. Tabs are expanded as if given an initial indent of start. */
335void owl_fmtext_expand_tabs(const owl_fmtext *in, owl_fmtext *out, int start) {
336  int col = start, numcopied = 0;
337  char *ptr;
338
339  /* Copy the default attributes. */
340  out->default_attrs = in->default_attrs;
341  out->default_fgcolor = in->default_fgcolor;
342  out->default_bgcolor = in->default_bgcolor;
343
344  for (ptr = in->buff->str;
345       ptr < in->buff->str + in->buff->len;
346       ptr = g_utf8_next_char(ptr)) {
347    gunichar c = g_utf8_get_char(ptr);
348    int chwidth;
349    if (c == '\t') {
350      /* Copy up to this tab */
351      _owl_fmtext_append_fmtext(out, in, numcopied, ptr - in->buff->str);
352      /* and then copy spaces for the tab. */
353      chwidth = OWL_TAB_WIDTH - (col % OWL_TAB_WIDTH);
354      owl_fmtext_append_spaces(out, chwidth);
355      col += chwidth;
356      numcopied = g_utf8_next_char(ptr) - in->buff->str;
357    } else {
358      /* Just update col. We'll append later. */
359      if (c == '\n') {
360        col = start;
361      } else if (!owl_fmtext_is_format_char(c)) {
362        col += mk_wcwidth(c);
363      }
364    }
365  }
366  /* Append anything we've missed. */
367  if (numcopied < in->buff->len)
368    _owl_fmtext_append_fmtext(out, in, numcopied, in->buff->len);
369}
370
371/* start with line 'aline' (where the first line is 0) and print
372 * 'lines' number of lines into 'out'
373 */
374int owl_fmtext_truncate_lines(const owl_fmtext *in, int aline, int lines, owl_fmtext *out)
375{
376  const char *ptr1, *ptr2;
377  int i, offset;
378 
379  /* find the starting line */
380  ptr1 = in->buff->str;
381  for (i = 0; i < aline; i++) {
382    ptr1 = strchr(ptr1, '\n');
383    if (!ptr1) return(-1);
384    ptr1++;
385  }
386 
387  /* ptr1 now holds the starting point */
388
389  /* copy the default attributes */
390  out->default_attrs = in->default_attrs;
391  out->default_fgcolor = in->default_fgcolor;
392  out->default_bgcolor = in->default_bgcolor;
393   
394  /* copy in the next 'lines' lines */
395  if (lines < 1) return(-1);
396
397  for (i = 0; i < lines; i++) {
398    offset = ptr1 - in->buff->str;
399    ptr2 = strchr(ptr1, '\n');
400    if (!ptr2) {
401      /* Copy to the end of the buffer. */
402      _owl_fmtext_append_fmtext(out, in, offset, in->buff->len);
403      return(-1);
404    }
405    /* Copy up to, and including, the new line. */
406    _owl_fmtext_append_fmtext(out, in, offset, (ptr2 - ptr1) + offset + 1);
407    ptr1 = ptr2 + 1;
408  }
409  return(0);
410}
411
412/* Implementation of owl_fmtext_truncate_cols. Does not support tabs in input. */
413void _owl_fmtext_truncate_cols_internal(const owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
414{
415  const char *ptr_s, *ptr_e, *ptr_c, *last;
416  int col, st, padding, chwidth;
417
418  /* copy the default attributes */
419  out->default_attrs = in->default_attrs;
420  out->default_fgcolor = in->default_fgcolor;
421  out->default_bgcolor = in->default_bgcolor;
422
423  last = in->buff->str + in->buff->len - 1;
424  ptr_s = in->buff->str;
425  while (ptr_s <= last) {
426    ptr_e=strchr(ptr_s, '\n');
427    if (!ptr_e) {
428      /* but this shouldn't happen if we end in a \n */
429      break;
430    }
431   
432    if (ptr_e == ptr_s) {
433      owl_fmtext_append_normal(out, "\n");
434      ++ptr_s;
435      continue;
436    }
437
438    col = 0;
439    st = 0;
440    padding = 0;
441    chwidth = 0;
442    ptr_c = ptr_s;
443    while(ptr_c < ptr_e) {
444      gunichar c = g_utf8_get_char(ptr_c);
445      if (!owl_fmtext_is_format_char(c)) {
446        chwidth = mk_wcwidth(c);
447        if (col + chwidth > bcol) break;
448       
449        if (col >= acol) {
450          if (st == 0) {
451            ptr_s = ptr_c;
452            padding = col - acol;
453            ++st;
454          }
455        }
456        col += chwidth;
457        chwidth = 0;
458      }
459      ptr_c = g_utf8_next_char(ptr_c);
460    }
461    if (st) {
462      /* lead padding */
463      owl_fmtext_append_spaces(out, padding);
464      if (ptr_c == ptr_e) {
465        /* We made it to the newline. Append up to, and including it. */
466        _owl_fmtext_append_fmtext(out, in, ptr_s - in->buff->str, ptr_c - in->buff->str + 1);
467      }
468      else if (chwidth > 1) {
469        /* Last char is wide, truncate. */
470        _owl_fmtext_append_fmtext(out, in, ptr_s - in->buff->str, ptr_c - in->buff->str);
471        owl_fmtext_append_normal(out, "\n");
472      }
473      else {
474        /* Last char fits perfectly, We stop at the next char to make
475         * sure we get it all. */
476        ptr_c = g_utf8_next_char(ptr_c);
477        _owl_fmtext_append_fmtext(out, in, ptr_s - in->buff->str, ptr_c - in->buff->str);
478      }
479    }
480    else {
481      owl_fmtext_append_normal(out, "\n");
482    }
483    ptr_s = g_utf8_next_char(ptr_e);
484  }
485}
486
487/* Truncate the message so that each line begins at column 'acol' and
488 * ends at 'bcol' or sooner.  The first column is number 0.  The new
489 * message is placed in 'out'.  The message is expected to end in a
490 * new line for now.
491 *
492 * NOTE: This needs to be modified to deal with backing up if we find
493 * a SPACING COMBINING MARK at the end of a line. If that happens, we
494 * should back up to the last non-mark character and stop there.
495 *
496 * NOTE: If a line ends at bcol, we omit the newline. This is so printing
497 * to ncurses works.
498 */
499void owl_fmtext_truncate_cols(const owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
500{
501  owl_fmtext notabs;
502
503  /* _owl_fmtext_truncate_cols_internal cannot handle tabs. */
504  if (strchr(in->buff->str, '\t')) {
505    owl_fmtext_init_null(&notabs);
506    owl_fmtext_expand_tabs(in, &notabs, 0);
507    _owl_fmtext_truncate_cols_internal(&notabs, acol, bcol, out);
508    owl_fmtext_cleanup(&notabs);
509  } else {
510    _owl_fmtext_truncate_cols_internal(in, acol, bcol, out);
511  }
512}
513
514/* Return the number of lines in 'f' */
515int owl_fmtext_num_lines(const owl_fmtext *f)
516{
517  int lines, i;
518  char *lastbreak, *p;
519
520  lines=0;
521  lastbreak = f->buff->str;
522  for (i = 0; i < f->buff->len; i++) {
523    if (f->buff->str[i]=='\n') {
524      lastbreak = f->buff->str + i;
525      lines++;
526    }
527  }
528
529  /* Check if there's a trailing line; formatting characters don't count. */
530  for (p = g_utf8_next_char(lastbreak);
531       p < f->buff->str + f->buff->len;
532       p = g_utf8_next_char(p)) {
533    if (!owl_fmtext_is_format_char(g_utf8_get_char(p))) {
534      lines++;
535      break;
536    }
537  }
538
539  return(lines);
540}
541
542/* Returns the line number, starting at 0, of the character which
543 * contains the byte at 'offset'. Note that a trailing newline is part
544 * of the line it ends. Also, while a trailing line of formatting
545 * characters does not contribute to owl_fmtext_num_lines, those
546 * characters are considered on a new line. */
547int owl_fmtext_line_number(const owl_fmtext *f, int offset)
548{
549  int i, lineno = 0;
550  if (offset >= f->buff->len)
551    offset = f->buff->len - 1;
552  for (i = 0; i < offset; i++) {
553    if (f->buff->str[i] == '\n')
554      lineno++;
555  }
556  return lineno;
557}
558
559/* Searches for line 'lineno' in 'f'. The returned range, [start,
560 * end), forms a half-open interval for the extent of the line. */
561void owl_fmtext_line_extents(const owl_fmtext *f, int lineno, int *o_start, int *o_end)
562{
563  int start, end;
564  char *newline;
565  for (start = 0; lineno > 0 && start < f->buff->len; start++) {
566    if (f->buff->str[start] == '\n')
567      lineno--;
568  }
569  newline = strchr(f->buff->str + start, '\n');
570  /* Include the newline, if it is there. */
571  end = newline ? newline - f->buff->str + 1 : f->buff->len;
572  if (o_start) *o_start = start;
573  if (o_end) *o_end = end;
574}
575
576const char *owl_fmtext_get_text(const owl_fmtext *f)
577{
578  return f->buff->str;
579}
580
581int owl_fmtext_num_bytes(const owl_fmtext *f)
582{
583  return f->buff->len;
584}
585
586/* Make a copy of the fmtext 'src' into 'dst' */
587void owl_fmtext_copy(owl_fmtext *dst, const owl_fmtext *src)
588{
589  dst->buff = g_string_new(src->buff->str);
590  dst->default_attrs = src->default_attrs;
591  dst->default_fgcolor = src->default_fgcolor;
592  dst->default_bgcolor = src->default_bgcolor;
593}
594
595/* Search 'f' for the regex 're' for matches starting at
596 * 'start'. Returns the offset of the first match, -1 if not
597 * found. This is a case-insensitive search.
598 */
599int owl_fmtext_search(const owl_fmtext *f, const owl_regex *re, int start)
600{
601  int offset;
602  if (start > f->buff->len ||
603      owl_regex_compare(re, f->buff->str + start, &offset, NULL) != 0)
604    return -1;
605  return offset + start;
606}
607
608
609/* Append the text 'text' to 'f' and interpret the zephyr style
610 * formatting syntax to set appropriate attributes.
611 */
612void owl_fmtext_append_ztext(owl_fmtext *f, const char *text)
613{
614  int stacksize, curattrs, curcolor;
615  const char *ptr, *txtptr, *tmpptr;
616  char *buff;
617  int attrstack[32], chrstack[32], colorstack[32];
618
619  curattrs=OWL_FMTEXT_ATTR_NONE;
620  curcolor=OWL_COLOR_DEFAULT;
621  stacksize=0;
622  txtptr=text;
623  while (1) {
624    ptr=strpbrk(txtptr, "@{[<()>]}");
625    if (!ptr) {
626      /* add all the rest of the text and exit */
627      owl_fmtext_append_attr(f, txtptr, curattrs, curcolor, OWL_COLOR_DEFAULT);
628      return;
629    } else if (ptr[0]=='@') {
630      /* add the text up to this point then deal with the stack */
631      buff=g_new(char, ptr-txtptr+20);
632      strncpy(buff, txtptr, ptr-txtptr);
633      buff[ptr-txtptr]='\0';
634      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
635      g_free(buff);
636
637      /* update pointer to point at the @ */
638      txtptr=ptr;
639
640      /* now the stack */
641
642      /* if we've hit our max stack depth, print the @ and move on */
643      if (stacksize==32) {
644        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
645        txtptr++;
646        continue;
647      }
648
649      /* if it's an @@, print an @ and continue */
650      if (txtptr[1]=='@') {
651        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
652        txtptr+=2;
653        continue;
654      }
655       
656      /* if there's no opener, print the @ and continue */
657      tmpptr=strpbrk(txtptr, "(<[{ ");
658      if (!tmpptr || tmpptr[0]==' ') {
659        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
660        txtptr++;
661        continue;
662      }
663
664      /* check what command we've got, push it on the stack, start
665         using it, and continue ... unless it's a color command */
666      buff=g_new(char, tmpptr-ptr+20);
667      strncpy(buff, ptr, tmpptr-ptr);
668      buff[tmpptr-ptr]='\0';
669      if (!strcasecmp(buff, "@bold")) {
670        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
671        chrstack[stacksize]=tmpptr[0];
672        colorstack[stacksize]=curcolor;
673        stacksize++;
674        curattrs|=OWL_FMTEXT_ATTR_BOLD;
675        txtptr+=6;
676        g_free(buff);
677        continue;
678      } else if (!strcasecmp(buff, "@b")) {
679        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
680        chrstack[stacksize]=tmpptr[0];
681        colorstack[stacksize]=curcolor;
682        stacksize++;
683        curattrs|=OWL_FMTEXT_ATTR_BOLD;
684        txtptr+=3;
685        g_free(buff);
686        continue;
687      } else if (!strcasecmp(buff, "@i")) {
688        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
689        chrstack[stacksize]=tmpptr[0];
690        colorstack[stacksize]=curcolor;
691        stacksize++;
692        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
693        txtptr+=3;
694        g_free(buff);
695        continue;
696      } else if (!strcasecmp(buff, "@italic")) {
697        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
698        chrstack[stacksize]=tmpptr[0];
699        colorstack[stacksize]=curcolor;
700        stacksize++;
701        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
702        txtptr+=8;
703        g_free(buff);
704        continue;
705      } else if (!strcasecmp(buff, "@")) {
706        attrstack[stacksize]=OWL_FMTEXT_ATTR_NONE;
707        chrstack[stacksize]=tmpptr[0];
708        colorstack[stacksize]=curcolor;
709        stacksize++;
710        txtptr+=2;
711        g_free(buff);
712        continue;
713
714        /* if it's a color read the color, set the current color and
715           continue */
716      } else if (!strcasecmp(buff, "@color") 
717                 && owl_global_get_hascolors(&g)
718                 && owl_global_is_colorztext(&g)) {
719        g_free(buff);
720        txtptr+=7;
721        tmpptr=strpbrk(txtptr, "@{[<()>]}");
722        if (tmpptr &&
723            ((txtptr[-1]=='(' && tmpptr[0]==')') ||
724             (txtptr[-1]=='<' && tmpptr[0]=='>') ||
725             (txtptr[-1]=='[' && tmpptr[0]==']') ||
726             (txtptr[-1]=='{' && tmpptr[0]=='}'))) {
727
728          /* grab the color name */
729          buff=g_new(char, tmpptr-txtptr+20);
730          strncpy(buff, txtptr, tmpptr-txtptr);
731          buff[tmpptr-txtptr]='\0';
732
733          /* set it as the current color */
734          curcolor=owl_util_string_to_color(buff);
735          if (curcolor == OWL_COLOR_INVALID)
736              curcolor = OWL_COLOR_DEFAULT;
737          g_free(buff);
738          txtptr=tmpptr+1;
739          continue;
740
741        } else {
742
743        }
744
745      } else {
746        /* if we didn't understand it, we'll print it.  This is different from zwgc
747         * but zwgc seems to be smarter about some screw cases than I am
748         */
749        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
750        txtptr++;
751        continue;
752      }
753
754    } else if (ptr[0]=='}' || ptr[0]==']' || ptr[0]==')' || ptr[0]=='>') {
755      /* add the text up to this point first */
756      buff=g_new(char, ptr-txtptr+20);
757      strncpy(buff, txtptr, ptr-txtptr);
758      buff[ptr-txtptr]='\0';
759      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
760      g_free(buff);
761
762      /* now deal with the closer */
763      txtptr=ptr;
764
765      /* first, if the stack is empty we must bail (just print and go) */
766      if (stacksize==0) {
767        buff=g_new(char, 5);
768        buff[0]=ptr[0];
769        buff[1]='\0';
770        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
771        g_free(buff);
772        txtptr++;
773        continue;
774      }
775
776      /* if the closing char is what's on the stack, turn off the
777         attribue and pop the stack */
778      if ((ptr[0]==')' && chrstack[stacksize-1]=='(') ||
779          (ptr[0]=='>' && chrstack[stacksize-1]=='<') ||
780          (ptr[0]==']' && chrstack[stacksize-1]=='[') ||
781          (ptr[0]=='}' && chrstack[stacksize-1]=='{')) {
782        int i;
783        stacksize--;
784        curattrs=OWL_FMTEXT_ATTR_NONE;
785        curcolor = colorstack[stacksize];
786        for (i=0; i<stacksize; i++) {
787          curattrs|=attrstack[i];
788        }
789        txtptr+=1;
790        continue;
791      } else {
792        /* otherwise print and continue */
793        buff=g_new(char, 5);
794        buff[0]=ptr[0];
795        buff[1]='\0';
796        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
797        g_free(buff);
798        txtptr++;
799        continue;
800      }
801    } else {
802      /* we've found an unattached opener, print everything and move on */
803      buff=g_new(char, ptr-txtptr+20);
804      strncpy(buff, txtptr, ptr-txtptr+1);
805      buff[ptr-txtptr+1]='\0';
806      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
807      g_free(buff);
808      txtptr=ptr+1;
809      continue;
810    }
811  }
812}
813
814/* requires that the list values are strings or NULL.
815 * joins the elements together with join_with.
816 * If format_fn is specified, passes it the list element value
817 * and it will return a string which this needs to free. */
818void owl_fmtext_append_list(owl_fmtext *f, const owl_list *l, const char *join_with, char *(format_fn)(const char *))
819{
820  int i, size;
821  const char *elem;
822  char *text;
823
824  size = owl_list_get_size(l);
825  for (i=0; i<size; i++) {
826    elem = owl_list_get_element(l,i);
827    if (elem && format_fn) {
828      text = format_fn(elem);
829      if (text) {
830        owl_fmtext_append_normal(f, text);
831        g_free(text);
832      }
833    } else if (elem) {
834      owl_fmtext_append_normal(f, elem);
835    }
836    if ((i < size-1) && join_with) {
837      owl_fmtext_append_normal(f, join_with);
838    }
839  }
840}
841
842/* Free all memory allocated by the object */
843void owl_fmtext_cleanup(owl_fmtext *f)
844{
845  if (f->buff) g_string_free(f->buff, true);
846  f->buff = NULL;
847}
848
849/*** Color Pair manager ***/
850void owl_fmtext_init_colorpair_mgr(owl_colorpair_mgr *cpmgr)
851{
852  /* This could be a bitarray if we wanted to save memory. */
853  short i;
854  /* The test is <= because we allocate COLORS+1 entries. */
855  cpmgr->pairs = g_new(short *, COLORS + 1);
856  for(i = 0; i <= COLORS; i++) {
857    cpmgr->pairs[i] = g_new(short, COLORS + 1);
858  }
859  owl_fmtext_reset_colorpairs(cpmgr);
860}
861
862/* Reset used list */
863void owl_fmtext_reset_colorpairs(owl_colorpair_mgr *cpmgr)
864{
865  short i, j;
866
867  cpmgr->overflow = false;
868  cpmgr->next = 8;
869  /* The test is <= because we allocated COLORS+1 entries. */
870  for(i = 0; i <= COLORS; i++) {
871    for(j = 0; j <= COLORS; j++) {
872      cpmgr->pairs[i][j] = -1;
873    }
874  }
875  if (owl_global_get_hascolors(&g)) {
876    for(i = 0; i < 8; i++) {
877      short fg, bg;
878      if (i >= COLORS) continue;
879      pair_content(i, &fg, &bg);
880      cpmgr->pairs[fg+1][bg+1] = i;
881    }
882  }
883}
884
885/* Assign pairs by request */
886short owl_fmtext_get_colorpair(int fg, int bg)
887{
888  owl_colorpair_mgr *cpmgr;
889  short pair;
890
891  /* Sanity (Bounds) Check */
892  if (fg > COLORS || fg < OWL_COLOR_DEFAULT) fg = OWL_COLOR_DEFAULT;
893  if (bg > COLORS || bg < OWL_COLOR_DEFAULT) bg = OWL_COLOR_DEFAULT;
894           
895#ifdef HAVE_USE_DEFAULT_COLORS
896  if (fg == OWL_COLOR_DEFAULT) fg = -1;
897#else
898  if (fg == OWL_COLOR_DEFAULT) fg = 0;
899  if (bg == OWL_COLOR_DEFAULT) bg = 0;
900#endif
901
902  /* looking for a pair we already set up for this draw. */
903  cpmgr = owl_global_get_colorpair_mgr(&g);
904  pair = cpmgr->pairs[fg+1][bg+1];
905  if (!(pair != -1 && pair < cpmgr->next)) {
906    /* If we didn't find a pair, search for a free one to assign. */
907    pair = (cpmgr->next < COLOR_PAIRS) ? cpmgr->next : -1;
908    if (pair != -1) {
909      /* We found a free pair, initialize it. */
910      init_pair(pair, fg, bg);
911      cpmgr->pairs[fg+1][bg+1] = pair;
912      cpmgr->next++;
913    }
914    else if (bg != OWL_COLOR_DEFAULT) {
915      /* We still don't have a pair, drop the background color. Too bad. */
916      owl_function_debugmsg("colorpairs: color shortage - dropping background color.");
917      cpmgr->overflow = true;
918      pair = owl_fmtext_get_colorpair(fg, OWL_COLOR_DEFAULT);
919    }
920    else {
921      /* We still don't have a pair, defaults all around. */
922      owl_function_debugmsg("colorpairs: color shortage - dropping foreground and background color.");
923      cpmgr->overflow = true;
924      pair = 0;
925    }
926  }
927  return pair;
928}
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