source: fmtext.c @ 7659079

release-1.8release-1.9
Last change on this file since 7659079 was 7659079, checked in by David Benjamin <davidben@mit.edu>, 11 years ago
Don't precompute UTF-8 encodings of format characters GString can append gunichar just fine.
  • Property mode set to 100644
File size: 27.4 KB
RevLine 
[7d4fbcd]1#include "owl.h"
2#include <stdlib.h>
3#include <string.h>
4
[b2b0773]5/* initialize an fmtext with no data */
[5789230]6void owl_fmtext_init_null(owl_fmtext *f)
7{
[7e111f4]8  f->buff = g_string_new("");
[9866c3a]9  f->default_attrs = OWL_FMTEXT_ATTR_NONE;
10  f->default_fgcolor = OWL_COLOR_DEFAULT;
[c55ad84]11  f->default_bgcolor = OWL_COLOR_DEFAULT;
[7d4fbcd]12}
13
[a387d12e]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{
[7e111f4]18  g_string_truncate(f->buff, 0);
[9866c3a]19  f->default_attrs = OWL_FMTEXT_ATTR_NONE;
20  f->default_fgcolor = OWL_COLOR_DEFAULT;
[c55ad84]21  f->default_bgcolor = OWL_COLOR_DEFAULT;
[7d4fbcd]22}
23
[c1522ec]24int owl_fmtext_is_format_char(gunichar c)
[9866c3a]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}
[b2b0773]30/* append text to the end of 'f' with attribute 'attr' and color
31 * 'color'
32 */
[e19eb97]33void owl_fmtext_append_attr(owl_fmtext *f, const char *text, char attr, short fgcolor, short bgcolor)
[5789230]34{
[7e111f4]35  int a = 0, fg = 0, bg = 0;
[9866c3a]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 */
[6c171f1]42  if (a)
[7e111f4]43    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_ATTR | attr);
[6c171f1]44  if (fg)
[7e111f4]45    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_FGCOLOR | fgcolor);
[6c171f1]46  if (bg)
[7e111f4]47    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_BGCOLOR | bgcolor);
48
49  g_string_append(f->buff, text);
[9866c3a]50
51  /* Reset attributes */
[7659079]52  if (bg) g_string_append_unichar(f->buff, OWL_FMTEXT_UC_BGDEFAULT);
53  if (fg) g_string_append_unichar(f->buff, OWL_FMTEXT_UC_FGDEFAULT);
54  if (a)  g_string_append_unichar(f->buff, OWL_FMTEXT_UC_ATTR | OWL_FMTEXT_UC_ATTR);
[7d4fbcd]55}
56
[b2b0773]57/* Append normal, uncolored text 'text' to 'f' */
[e19eb97]58void owl_fmtext_append_normal(owl_fmtext *f, const char *text)
[5789230]59{
[8fa9562]60  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]61}
62
[1490327]63/* Append normal, uncolored text specified by format string to 'f' */
[e19eb97]64void owl_fmtext_appendf_normal(owl_fmtext *f, const char *fmt, ...)
[1490327]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);
[ddbbcffa]75  g_free(buff);
[1490327]76}
77
[b2b0773]78/* Append normal text 'text' to 'f' with color 'color' */
[e19eb97]79void owl_fmtext_append_normal_color(owl_fmtext *f, const char *text, int fgcolor, int bgcolor)
[5789230]80{
[8fa9562]81  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, fgcolor, bgcolor);
[7d4fbcd]82}
83
[b2b0773]84/* Append bold text 'text' to 'f' */
[e19eb97]85void owl_fmtext_append_bold(owl_fmtext *f, const char *text)
[5789230]86{
[8fa9562]87  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]88}
89
[b2b0773]90/* Append reverse video text 'text' to 'f' */
[e19eb97]91void owl_fmtext_append_reverse(owl_fmtext *f, const char *text)
[5789230]92{
[8fa9562]93  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]94}
95
[b2b0773]96/* Append reversed and bold, uncolored text 'text' to 'f' */
[e19eb97]97void owl_fmtext_append_reversebold(owl_fmtext *f, const char *text)
[5789230]98{
[8fa9562]99  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE | OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]100}
101
[9866c3a]102/* Add the attribute 'attr' to the default atts for the text in 'f' */
103void owl_fmtext_addattr(owl_fmtext *f, char attr)
[5789230]104{
[7d4fbcd]105  /* add the attribute to all text */
[9866c3a]106  f->default_attrs |= attr;
[7d4fbcd]107}
108
[9866c3a]109/* Set the default foreground color for this fmtext to 'color'.
110 * Only affects text that is colored default.
[b2b0773]111 */
[5789230]112void owl_fmtext_colorize(owl_fmtext *f, int color)
113{
[9866c3a]114  f->default_fgcolor = color;
[8fa9562]115}
116
[9866c3a]117/* Set the default foreground color for this fmtext to 'color'.
118 * Only affects text that is colored default.
119 */
[8fa9562]120void owl_fmtext_colorizebg(owl_fmtext *f, int color)
121{
[9866c3a]122  f->default_bgcolor = color;
123}
[7d4fbcd]124
[9866c3a]125/* Internal function. Parse attrbute character. */
[e9c6fc8]126static void _owl_fmtext_update_attributes(gunichar c, char *attr, short *fgcolor, short *bgcolor)
[9866c3a]127{
128  if ((c & OWL_FMTEXT_UC_ATTR) == OWL_FMTEXT_UC_ATTR) {
129    *attr = c & OWL_FMTEXT_UC_ATTR_MASK;
130  }
[6f6330b]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    }
[7d4fbcd]142  }
143}
144
[9866c3a]145/* Internal function. Scan for attribute characters. */
[e9c6fc8]146static void _owl_fmtext_scan_attributes(const owl_fmtext *f, int start, char *attr, short *fgcolor, short *bgcolor)
[9866c3a]147{
[e19eb97]148  const char *p;
[7e111f4]149  p = strchr(f->buff->str, OWL_FMTEXT_UC_STARTBYTE_UTF8);
150  while (p && p < f->buff->str + start) {
[9866c3a]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
[e0e0e5a]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.
[b2b0773]159 */
[e9c6fc8]160static void _owl_fmtext_append_fmtext(owl_fmtext *f, const owl_fmtext *in, int start, int stop)
[9866c3a]161{
[7e111f4]162  int a = 0, fg = 0, bg = 0;
[9866c3a]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
[6c171f1]172  if (a)
[7e111f4]173    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_ATTR | attr);
[6c171f1]174  if (fg)
[7e111f4]175    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_FGCOLOR | fgcolor);
[6c171f1]176  if (bg)
[7e111f4]177    g_string_append_unichar(f->buff, OWL_FMTEXT_UC_BGCOLOR | bgcolor);
[9866c3a]178
[7e111f4]179  g_string_append_len(f->buff, in->buff->str+start, stop-start);
[9866c3a]180
181  /* Reset attributes */
[7659079]182  g_string_append_unichar(f->buff, OWL_FMTEXT_UC_BGDEFAULT);
183  g_string_append_unichar(f->buff, OWL_FMTEXT_UC_FGDEFAULT);
184  g_string_append_unichar(f->buff, OWL_FMTEXT_UC_ATTR | OWL_FMTEXT_UC_ATTR);
[7d4fbcd]185}
186
[b2b0773]187/* append fmtext 'in' to 'f' */
[075ba92]188void owl_fmtext_append_fmtext(owl_fmtext *f, const owl_fmtext *in)
[5789230]189{
[7e111f4]190  _owl_fmtext_append_fmtext(f, in, 0, in->buff->len);
[5789230]191
192}
193
[b2b0773]194/* Append 'nspaces' number of spaces to the end of 'f' */
[5789230]195void owl_fmtext_append_spaces(owl_fmtext *f, int nspaces)
196{
[7d4fbcd]197  int i;
198  for (i=0; i<nspaces; i++) {
199    owl_fmtext_append_normal(f, " ");
200  }
201}
202
[b2b0773]203/* Return a plain version of the fmtext.  Caller is responsible for
204 * freeing the return
205 */
[075ba92]206char *owl_fmtext_print_plain(const owl_fmtext *f)
[5789230]207{
[7e111f4]208  return owl_strip_format_chars(f->buff->str);
[e1c4636]209}
210
[e9c6fc8]211static void _owl_fmtext_wattrset(WINDOW *w, int attrs)
[9866c3a]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}
[16c6cca]218
[e9c6fc8]219static void _owl_fmtext_update_colorpair(short fg, short bg, short *pair)
[16c6cca]220{
221  if (owl_global_get_hascolors(&g)) {
222    *pair = owl_fmtext_get_colorpair(fg, bg);
223  }
224}
225
[e9c6fc8]226static void _owl_fmtext_wcolor_set(WINDOW *w, short pair)
[16c6cca]227{
228  if (owl_global_get_hascolors(&g)) {
229      wcolor_set(w,pair,NULL);
[39cff48]230      wbkgdset(w, COLOR_PAIR(pair));
[16c6cca]231  }
232}
233
[b2b0773]234/* add the formatted text to the curses window 'w'.  The window 'w'
235 * must already be initiatlized with curses
236 */
[e9c6fc8]237static void _owl_fmtext_curs_waddstr(const owl_fmtext *f, WINDOW *w, int do_search)
[9866c3a]238{
239  /* char *tmpbuff; */
240  /* int position, trans1, trans2, trans3, len, lastsame; */
241  char *s, *p;
242  char attr;
[18fb86ee]243  short fg, bg, pair = 0;
[9866c3a]244 
[f2f9314]245  if (w==NULL) {
246    owl_function_debugmsg("Hit a null window in owl_fmtext_curs_waddstr.");
247    return;
248  }
249
[7e111f4]250  s = f->buff->str;
[9866c3a]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);
[16c6cca]256  _owl_fmtext_update_colorpair(fg, bg, &pair);
257  _owl_fmtext_wcolor_set(w, pair);
[7d4fbcd]258
[9866c3a]259  /* Find next possible format character. */
260  p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
261  while(p) {
[c1522ec]262    if (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
[9866c3a]263      /* Deal with all text from last insert to here. */
264      char tmp;
265   
266      tmp = p[0];
267      p[0] = '\0';
[449c682]268      if (do_search && owl_global_is_search_active(&g)) {
[9866c3a]269        /* Search is active, so highlight search results. */
[41c9a96]270        int start, end;
271        while (owl_regex_compare(owl_global_get_search_re(&g), s, &start, &end) == 0) {
[0ed5c57]272          /* Prevent an infinite loop matching the empty string. */
273          if (end == 0)
274            break;
275
[9866c3a]276          /* Found search string, highlight it. */
277
[d3c318b]278          waddnstr(w, s, start);
[9866c3a]279
[987a93c]280          _owl_fmtext_wattrset(w, attr ^ OWL_FMTEXT_ATTR_REVERSE);
[16c6cca]281          _owl_fmtext_wcolor_set(w, pair);
282         
[d3c318b]283          waddnstr(w, s + start, end - start);
[9866c3a]284
[16c6cca]285          _owl_fmtext_wattrset(w, attr);
286          _owl_fmtext_wcolor_set(w, pair);
[9866c3a]287
[41c9a96]288          s += end;
[9866c3a]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;
[f119757]300      while (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
[9866c3a]301        _owl_fmtext_update_attributes(g_utf8_get_char(p), &attr, &fg, &bg);
302        p = g_utf8_next_char(p);
[7d4fbcd]303      }
[9866c3a]304      _owl_fmtext_wattrset(w, attr | f->default_attrs);
[16c6cca]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
[9866c3a]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);
[7d4fbcd]316    }
317  }
[9866c3a]318  if (s) {
319    waddstr(w, s);
320  }
[39cff48]321  wbkgdset(w, 0);
[7d4fbcd]322}
323
[075ba92]324void owl_fmtext_curs_waddstr(const owl_fmtext *f, WINDOW *w)
[47519e1b]325{
[449c682]326  _owl_fmtext_curs_waddstr(f, w, 1);
[47519e1b]327}
328
[075ba92]329void owl_fmtext_curs_waddstr_without_search(const owl_fmtext *f, WINDOW *w)
[47519e1b]330{
331  _owl_fmtext_curs_waddstr(f, w, 0);
332}
[7d4fbcd]333
[2b83ad6]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
[7e111f4]344  for (ptr = in->buff->str;
345       ptr < in->buff->str + in->buff->len;
[2b83ad6]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 */
[7e111f4]351      _owl_fmtext_append_fmtext(out, in, numcopied, ptr - in->buff->str);
[2b83ad6]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;
[7e111f4]356      numcopied = g_utf8_next_char(ptr) - in->buff->str;
[2b83ad6]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. */
[7e111f4]367  if (numcopied < in->buff->len)
368    _owl_fmtext_append_fmtext(out, in, numcopied, in->buff->len);
[2b83ad6]369}
370
[b2b0773]371/* start with line 'aline' (where the first line is 0) and print
372 * 'lines' number of lines into 'out'
373 */
[075ba92]374int owl_fmtext_truncate_lines(const owl_fmtext *in, int aline, int lines, owl_fmtext *out)
[5789230]375{
[e19eb97]376  const char *ptr1, *ptr2;
[7d4fbcd]377  int i, offset;
378 
379  /* find the starting line */
[7e111f4]380  ptr1 = in->buff->str;
[9866c3a]381  for (i = 0; i < aline; i++) {
382    ptr1 = strchr(ptr1, '\n');
383    if (!ptr1) return(-1);
384    ptr1++;
[7d4fbcd]385  }
[9866c3a]386 
[7d4fbcd]387  /* ptr1 now holds the starting point */
388
[c55ad84]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   
[7d4fbcd]394  /* copy in the next 'lines' lines */
[9866c3a]395  if (lines < 1) return(-1);
[7d4fbcd]396
[9866c3a]397  for (i = 0; i < lines; i++) {
[7e111f4]398    offset = ptr1 - in->buff->str;
[9866c3a]399    ptr2 = strchr(ptr1, '\n');
[7d4fbcd]400    if (!ptr2) {
[e0e0e5a]401      /* Copy to the end of the buffer. */
[7e111f4]402      _owl_fmtext_append_fmtext(out, in, offset, in->buff->len);
[7d4fbcd]403      return(-1);
404    }
[e0e0e5a]405    /* Copy up to, and including, the new line. */
406    _owl_fmtext_append_fmtext(out, in, offset, (ptr2 - ptr1) + offset + 1);
[9866c3a]407    ptr1 = ptr2 + 1;
[7d4fbcd]408  }
409  return(0);
410}
411
[e0022d2]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)
[5789230]414{
[e19eb97]415  const char *ptr_s, *ptr_e, *ptr_c, *last;
[9866c3a]416  int col, st, padding, chwidth;
[7d4fbcd]417
[c55ad84]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
[7e111f4]423  last = in->buff->str + in->buff->len - 1;
424  ptr_s = in->buff->str;
[9866c3a]425  while (ptr_s <= last) {
[28ee32b]426    ptr_e=strchr(ptr_s, '\n');
427    if (!ptr_e) {
[dd6af02]428      /* but this shouldn't happen if we end in a \n */
429      break;
[7d4fbcd]430    }
431   
[9866c3a]432    if (ptr_e == ptr_s) {
[7d4fbcd]433      owl_fmtext_append_normal(out, "\n");
[9866c3a]434      ++ptr_s;
[7d4fbcd]435      continue;
436    }
437
[28ee32b]438    col = 0;
[9866c3a]439    st = 0;
[dd24b6a]440    padding = 0;
[47519e1b]441    chwidth = 0;
[28ee32b]442    ptr_c = ptr_s;
[3a7cf49]443    while(ptr_c < ptr_e) {
[28ee32b]444      gunichar c = g_utf8_get_char(ptr_c);
[c1522ec]445      if (!owl_fmtext_is_format_char(c)) {
[47519e1b]446        chwidth = mk_wcwidth(c);
[3a7cf49]447        if (col + chwidth > bcol) break;
448       
[9866c3a]449        if (col >= acol) {
450          if (st == 0) {
451            ptr_s = ptr_c;
452            padding = col - acol;
453            ++st;
454          }
[dd24b6a]455        }
[9866c3a]456        col += chwidth;
457        chwidth = 0;
[28ee32b]458      }
[9866c3a]459      ptr_c = g_utf8_next_char(ptr_c);
[dd24b6a]460    }
[9866c3a]461    if (st) {
462      /* lead padding */
463      owl_fmtext_append_spaces(out, padding);
[3a7cf49]464      if (ptr_c == ptr_e) {
[e0e0e5a]465        /* We made it to the newline. Append up to, and including it. */
[7e111f4]466        _owl_fmtext_append_fmtext(out, in, ptr_s - in->buff->str, ptr_c - in->buff->str + 1);
[9866c3a]467      }
[db1af5fa]468      else if (chwidth > 1) {
469        /* Last char is wide, truncate. */
[7e111f4]470        _owl_fmtext_append_fmtext(out, in, ptr_s - in->buff->str, ptr_c - in->buff->str);
[db1af5fa]471        owl_fmtext_append_normal(out, "\n");
472      }
[9866c3a]473      else {
[e0e0e5a]474        /* Last char fits perfectly, We stop at the next char to make
475         * sure we get it all. */
[db1af5fa]476        ptr_c = g_utf8_next_char(ptr_c);
[7e111f4]477        _owl_fmtext_append_fmtext(out, in, ptr_s - in->buff->str, ptr_c - in->buff->str);
[28ee32b]478      }
[dd24b6a]479    }
480    else {
481      owl_fmtext_append_normal(out, "\n");
[28ee32b]482    }
[dd6af02]483    ptr_s = g_utf8_next_char(ptr_e);
[7d4fbcd]484  }
485}
486
[e0022d2]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. */
[7e111f4]504  if (strchr(in->buff->str, '\t')) {
[e0022d2]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
[b2b0773]514/* Return the number of lines in 'f' */
[075ba92]515int owl_fmtext_num_lines(const owl_fmtext *f)
[5789230]516{
[7d4fbcd]517  int lines, i;
[c93b8b5]518  char *lastbreak, *p;
[7d4fbcd]519
520  lines=0;
[7e111f4]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;
[c93b8b5]525      lines++;
526    }
[7d4fbcd]527  }
528
[c93b8b5]529  /* Check if there's a trailing line; formatting characters don't count. */
530  for (p = g_utf8_next_char(lastbreak);
[7e111f4]531       p < f->buff->str + f->buff->len;
[c93b8b5]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  }
[7d4fbcd]538
539  return(lines);
540}
541
[f7456bc]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;
[7e111f4]550  if (offset >= f->buff->len)
551    offset = f->buff->len - 1;
[f7456bc]552  for (i = 0; i < offset; i++) {
[7e111f4]553    if (f->buff->str[i] == '\n')
[f7456bc]554      lineno++;
555  }
556  return lineno;
557}
558
[7ba2ad4]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;
[7e111f4]565  for (start = 0; lineno > 0 && start < f->buff->len; start++) {
566    if (f->buff->str[start] == '\n')
[7ba2ad4]567      lineno--;
568  }
[7e111f4]569  newline = strchr(f->buff->str + start, '\n');
[7ba2ad4]570  /* Include the newline, if it is there. */
[7e111f4]571  end = newline ? newline - f->buff->str + 1 : f->buff->len;
[7ba2ad4]572  if (o_start) *o_start = start;
573  if (o_end) *o_end = end;
574}
575
[075ba92]576const char *owl_fmtext_get_text(const owl_fmtext *f)
[5789230]577{
[7e111f4]578  return f->buff->str;
[7d4fbcd]579}
580
[6772d19]581int owl_fmtext_num_bytes(const owl_fmtext *f)
582{
[7e111f4]583  return f->buff->len;
[6772d19]584}
585
[b2b0773]586/* Make a copy of the fmtext 'src' into 'dst' */
[075ba92]587void owl_fmtext_copy(owl_fmtext *dst, const owl_fmtext *src)
[5789230]588{
[7e111f4]589  dst->buff = g_string_new(src->buff->str);
[9866c3a]590  dst->default_attrs = src->default_attrs;
591  dst->default_fgcolor = src->default_fgcolor;
592  dst->default_bgcolor = src->default_bgcolor;
[1fd0b25]593}
594
[72f613a]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.
[5789230]598 */
[72f613a]599int owl_fmtext_search(const owl_fmtext *f, const owl_regex *re, int start)
[5789230]600{
[72f613a]601  int offset;
[7e111f4]602  if (start > f->buff->len ||
603      owl_regex_compare(re, f->buff->str + start, &offset, NULL) != 0)
[72f613a]604    return -1;
605  return offset + start;
[1fd0b25]606}
[12c35df]607
608
609/* Append the text 'text' to 'f' and interpret the zephyr style
610 * formatting syntax to set appropriate attributes.
611 */
[e19eb97]612void owl_fmtext_append_ztext(owl_fmtext *f, const char *text)
[12c35df]613{
614  int stacksize, curattrs, curcolor;
[e19eb97]615  const char *ptr, *txtptr, *tmpptr;
[65b2173]616  char *buff;
[d754b0a]617  int attrstack[32], chrstack[32], colorstack[32];
[12c35df]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 */
[8fa9562]627      owl_fmtext_append_attr(f, txtptr, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]628      return;
629    } else if (ptr[0]=='@') {
630      /* add the text up to this point then deal with the stack */
[96828e4]631      buff=g_new(char, ptr-txtptr+20);
[12c35df]632      strncpy(buff, txtptr, ptr-txtptr);
633      buff[ptr-txtptr]='\0';
[8fa9562]634      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[ddbbcffa]635      g_free(buff);
[12c35df]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) {
[1bdffcb]644        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
645        txtptr++;
646        continue;
[12c35df]647      }
648
649      /* if it's an @@, print an @ and continue */
650      if (txtptr[1]=='@') {
[1bdffcb]651        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
652        txtptr+=2;
653        continue;
[12c35df]654      }
[1bdffcb]655       
[12c35df]656      /* if there's no opener, print the @ and continue */
657      tmpptr=strpbrk(txtptr, "(<[{ ");
658      if (!tmpptr || tmpptr[0]==' ') {
[1bdffcb]659        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
660        txtptr++;
661        continue;
[12c35df]662      }
663
664      /* check what command we've got, push it on the stack, start
[1bdffcb]665         using it, and continue ... unless it's a color command */
[96828e4]666      buff=g_new(char, tmpptr-ptr+20);
[12c35df]667      strncpy(buff, ptr, tmpptr-ptr);
668      buff[tmpptr-ptr]='\0';
669      if (!strcasecmp(buff, "@bold")) {
[1bdffcb]670        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
671        chrstack[stacksize]=tmpptr[0];
[d754b0a]672        colorstack[stacksize]=curcolor;
[1bdffcb]673        stacksize++;
674        curattrs|=OWL_FMTEXT_ATTR_BOLD;
675        txtptr+=6;
[ddbbcffa]676        g_free(buff);
[1bdffcb]677        continue;
[12c35df]678      } else if (!strcasecmp(buff, "@b")) {
[1bdffcb]679        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
680        chrstack[stacksize]=tmpptr[0];
[d754b0a]681        colorstack[stacksize]=curcolor;
[1bdffcb]682        stacksize++;
683        curattrs|=OWL_FMTEXT_ATTR_BOLD;
684        txtptr+=3;
[ddbbcffa]685        g_free(buff);
[1bdffcb]686        continue;
[12c35df]687      } else if (!strcasecmp(buff, "@i")) {
[1bdffcb]688        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
689        chrstack[stacksize]=tmpptr[0];
[d754b0a]690        colorstack[stacksize]=curcolor;
[1bdffcb]691        stacksize++;
692        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
693        txtptr+=3;
[ddbbcffa]694        g_free(buff);
[1bdffcb]695        continue;
[12c35df]696      } else if (!strcasecmp(buff, "@italic")) {
[1bdffcb]697        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
698        chrstack[stacksize]=tmpptr[0];
[d754b0a]699        colorstack[stacksize]=curcolor;
[1bdffcb]700        stacksize++;
701        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
702        txtptr+=8;
[ddbbcffa]703        g_free(buff);
[1bdffcb]704        continue;
[d754b0a]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;
[ddbbcffa]711        g_free(buff);
[d754b0a]712        continue;
[1bdffcb]713
714        /* if it's a color read the color, set the current color and
[12c35df]715           continue */
716      } else if (!strcasecmp(buff, "@color") 
[1bdffcb]717                 && owl_global_get_hascolors(&g)
718                 && owl_global_is_colorztext(&g)) {
[ddbbcffa]719        g_free(buff);
[1bdffcb]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 */
[96828e4]729          buff=g_new(char, tmpptr-txtptr+20);
[1bdffcb]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);
[1ee5c79]735          if (curcolor == OWL_COLOR_INVALID)
736              curcolor = OWL_COLOR_DEFAULT;
[ddbbcffa]737          g_free(buff);
[1bdffcb]738          txtptr=tmpptr+1;
739          continue;
740
741        } else {
742
743        }
[12c35df]744
745      } else {
[1bdffcb]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;
[12c35df]752      }
753
754    } else if (ptr[0]=='}' || ptr[0]==']' || ptr[0]==')' || ptr[0]=='>') {
755      /* add the text up to this point first */
[96828e4]756      buff=g_new(char, ptr-txtptr+20);
[12c35df]757      strncpy(buff, txtptr, ptr-txtptr);
758      buff[ptr-txtptr]='\0';
[8fa9562]759      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[ddbbcffa]760      g_free(buff);
[12c35df]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) {
[96828e4]767        buff=g_new(char, 5);
[1bdffcb]768        buff[0]=ptr[0];
769        buff[1]='\0';
770        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[ddbbcffa]771        g_free(buff);
[1bdffcb]772        txtptr++;
773        continue;
[12c35df]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]=='(') ||
[1bdffcb]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;
[d754b0a]785        curcolor = colorstack[stacksize];
[1bdffcb]786        for (i=0; i<stacksize; i++) {
787          curattrs|=attrstack[i];
788        }
789        txtptr+=1;
790        continue;
[12c35df]791      } else {
[1bdffcb]792        /* otherwise print and continue */
[96828e4]793        buff=g_new(char, 5);
[1bdffcb]794        buff[0]=ptr[0];
795        buff[1]='\0';
796        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[ddbbcffa]797        g_free(buff);
[1bdffcb]798        txtptr++;
799        continue;
[12c35df]800      }
801    } else {
802      /* we've found an unattached opener, print everything and move on */
[96828e4]803      buff=g_new(char, ptr-txtptr+20);
[12c35df]804      strncpy(buff, txtptr, ptr-txtptr+1);
805      buff[ptr-txtptr+1]='\0';
[8fa9562]806      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[ddbbcffa]807      g_free(buff);
[12c35df]808      txtptr=ptr+1;
809      continue;
810    }
811  }
812}
[a0a5179]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. */
[77bced3]818void owl_fmtext_append_list(owl_fmtext *f, const owl_list *l, const char *join_with, char *(format_fn)(const char *))
[a0a5179]819{
820  int i, size;
[e19eb97]821  const char *elem;
[a0a5179]822  char *text;
823
824  size = owl_list_get_size(l);
825  for (i=0; i<size; i++) {
[4d86e06]826    elem = owl_list_get_element(l,i);
[a0a5179]827    if (elem && format_fn) {
828      text = format_fn(elem);
829      if (text) {
[1bdffcb]830        owl_fmtext_append_normal(f, text);
[ddbbcffa]831        g_free(text);
[a0a5179]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 */
[7ab0020]843void owl_fmtext_cleanup(owl_fmtext *f)
[a0a5179]844{
[7e111f4]845  if (f->buff) g_string_free(f->buff, true);
846  f->buff = NULL;
[8fa9562]847}
848
849/*** Color Pair manager ***/
850void owl_fmtext_init_colorpair_mgr(owl_colorpair_mgr *cpmgr)
851{
[af1920fd]852  /* This could be a bitarray if we wanted to save memory. */
[e062f97]853  short i;
[af1920fd]854  /* The test is <= because we allocate COLORS+1 entries. */
[96828e4]855  cpmgr->pairs = g_new(short *, COLORS + 1);
[c2c5c77]856  for(i = 0; i <= COLORS; i++) {
[96828e4]857    cpmgr->pairs[i] = g_new(short, COLORS + 1);
[c2c5c77]858  }
[e062f97]859  owl_fmtext_reset_colorpairs(cpmgr);
[a0a5179]860}
861
[8fa9562]862/* Reset used list */
[e062f97]863void owl_fmtext_reset_colorpairs(owl_colorpair_mgr *cpmgr)
[8fa9562]864{
[e062f97]865  short i, j;
866
[099597c]867  cpmgr->overflow = false;
[e062f97]868  cpmgr->next = 8;
[099597c]869  /* The test is <= because we allocated COLORS+1 entries. */
[e062f97]870  for(i = 0; i <= COLORS; i++) {
871    for(j = 0; j <= COLORS; j++) {
872      cpmgr->pairs[i][j] = -1;
[fa3290d]873    }
[e062f97]874  }
875  if (owl_global_get_hascolors(&g)) {
[fa3290d]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;
[eeeef20]881    }
[c2c5c77]882  }
[8fa9562]883}
884
885/* Assign pairs by request */
[1bdffcb]886short owl_fmtext_get_colorpair(int fg, int bg)
[8fa9562]887{
888  owl_colorpair_mgr *cpmgr;
[423adcb]889  short pair;
[1bdffcb]890
[1b737a1]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           
[1bdffcb]895#ifdef HAVE_USE_DEFAULT_COLORS
[8fa9562]896  if (fg == OWL_COLOR_DEFAULT) fg = -1;
[1bdffcb]897#else
898  if (fg == OWL_COLOR_DEFAULT) fg = 0;
899  if (bg == OWL_COLOR_DEFAULT) bg = 0;
900#endif
901
[af1920fd]902  /* looking for a pair we already set up for this draw. */
[c2c5c77]903  cpmgr = owl_global_get_colorpair_mgr(&g);
904  pair = cpmgr->pairs[fg+1][bg+1];
905  if (!(pair != -1 && pair < cpmgr->next)) {
[af1920fd]906    /* If we didn't find a pair, search for a free one to assign. */
[c2c5c77]907    pair = (cpmgr->next < COLOR_PAIRS) ? cpmgr->next : -1;
908    if (pair != -1) {
[af1920fd]909      /* We found a free pair, initialize it. */
[c2c5c77]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) {
[af1920fd]915      /* We still don't have a pair, drop the background color. Too bad. */
[c2c5c77]916      owl_function_debugmsg("colorpairs: color shortage - dropping background color.");
[099597c]917      cpmgr->overflow = true;
[c2c5c77]918      pair = owl_fmtext_get_colorpair(fg, OWL_COLOR_DEFAULT);
919    }
920    else {
[af1920fd]921      /* We still don't have a pair, defaults all around. */
[c2c5c77]922      owl_function_debugmsg("colorpairs: color shortage - dropping foreground and background color.");
[099597c]923      cpmgr->overflow = true;
[c2c5c77]924      pair = 0;
[8fa9562]925    }
926  }
927  return pair;
928}
Note: See TracBrowser for help on using the repository browser.