source: fmtext.c @ 6772d19

release-1.7release-1.8release-1.9
Last change on this file since 6772d19 was 6772d19, checked in by David Benjamin <davidben@mit.edu>, 11 years ago
Add a test case for owl_fmtext with two failures When appending text, we get the textlen wrong. We also fail to correctly consider attributes in owl_fmtext_num_lines. This also adds tests for owl_fmtext_truncate_cols and owl_fmtext_truncate_lines as they are finicky.
  • Property mode set to 100644
File size: 25.7 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{
[9866c3a]8  f->textlen = 0;
9  f->bufflen = 5;
10  f->textbuff = owl_malloc(5);
11  f->textbuff[0] = 0;
12  f->default_attrs = OWL_FMTEXT_ATTR_NONE;
13  f->default_fgcolor = OWL_COLOR_DEFAULT;
[c55ad84]14  f->default_bgcolor = OWL_COLOR_DEFAULT;
[7d4fbcd]15}
16
[a387d12e]17/* Clear the data from an fmtext, but don't deallocate memory. This
18   fmtext can then be appended to again. */
19void owl_fmtext_clear(owl_fmtext *f)
20{
[9866c3a]21  f->textlen = 0;
22  f->textbuff[0] = 0;
23  f->default_attrs = OWL_FMTEXT_ATTR_NONE;
24  f->default_fgcolor = OWL_COLOR_DEFAULT;
[c55ad84]25  f->default_bgcolor = OWL_COLOR_DEFAULT;
[7d4fbcd]26}
27
[e9c6fc8]28static void _owl_fmtext_realloc(owl_fmtext *f, int newlen)
[a387d12e]29{
30    if(newlen + 1 > f->bufflen) {
[9866c3a]31      f->textbuff = owl_realloc(f->textbuff, newlen + 1);
[a387d12e]32      f->bufflen = newlen+1;
33  }
34}
35
[c1522ec]36int owl_fmtext_is_format_char(gunichar c)
[9866c3a]37{
38  if ((c & ~OWL_FMTEXT_UC_ATTR_MASK) == OWL_FMTEXT_UC_ATTR) return 1;
39  if ((c & ~(OWL_FMTEXT_UC_ALLCOLOR_MASK)) == OWL_FMTEXT_UC_COLOR_BASE) return 1;
40  return 0;
41}
[b2b0773]42/* append text to the end of 'f' with attribute 'attr' and color
43 * 'color'
44 */
[e19eb97]45void owl_fmtext_append_attr(owl_fmtext *f, const char *text, char attr, short fgcolor, short bgcolor)
[5789230]46{
[9866c3a]47  char attrbuff[6];
48  int newlen, a = 0, fg = 0, bg = 0;
49 
50  if (attr != OWL_FMTEXT_ATTR_NONE) a=1;
51  if (fgcolor != OWL_COLOR_DEFAULT) fg=1;
52  if (bgcolor != OWL_COLOR_DEFAULT) bg=1;
53
54  /* Plane-16 characters in UTF-8 are 4 bytes long. */
55  newlen = strlen(f->textbuff) + strlen(text) + (8 * (a + fg + bg));
[a387d12e]56  _owl_fmtext_realloc(f, newlen);
[9866c3a]57
58  /* Set attributes */
[6c171f1]59  if (a)
60    strncat(f->textbuff, attrbuff,
61            g_unichar_to_utf8(OWL_FMTEXT_UC_ATTR | attr, attrbuff));
62  if (fg)
63    strncat(f->textbuff, attrbuff,
64            g_unichar_to_utf8(OWL_FMTEXT_UC_FGCOLOR | fgcolor, attrbuff));
65  if (bg)
66    strncat(f->textbuff, attrbuff,
67            g_unichar_to_utf8(OWL_FMTEXT_UC_BGCOLOR | bgcolor, attrbuff));
[a387d12e]68 
[7d4fbcd]69  strcat(f->textbuff, text);
[9866c3a]70
71  /* Reset attributes */
72  if (bg) strcat(f->textbuff, OWL_FMTEXT_UTF8_BGDEFAULT);
73  if (fg) strcat(f->textbuff, OWL_FMTEXT_UTF8_FGDEFAULT);
74  if (a)  strcat(f->textbuff, OWL_FMTEXT_UTF8_ATTR_NONE);
[7d4fbcd]75  f->textlen=newlen;
76}
77
[b2b0773]78/* Append normal, uncolored text 'text' to 'f' */
[e19eb97]79void owl_fmtext_append_normal(owl_fmtext *f, const char *text)
[5789230]80{
[8fa9562]81  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]82}
83
[1490327]84/* Append normal, uncolored text specified by format string to 'f' */
[e19eb97]85void owl_fmtext_appendf_normal(owl_fmtext *f, const char *fmt, ...)
[1490327]86{
87  va_list ap;
88  char *buff;
89
90  va_start(ap, fmt);
91  buff = g_strdup_vprintf(fmt, ap);
92  va_end(ap);
93  if (!buff)
94    return;
95  owl_fmtext_append_attr(f, buff, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[1a01720]96  owl_free(buff);
[1490327]97}
98
[b2b0773]99/* Append normal text 'text' to 'f' with color 'color' */
[e19eb97]100void owl_fmtext_append_normal_color(owl_fmtext *f, const char *text, int fgcolor, int bgcolor)
[5789230]101{
[8fa9562]102  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, fgcolor, bgcolor);
[7d4fbcd]103}
104
[b2b0773]105/* Append bold text 'text' to 'f' */
[e19eb97]106void owl_fmtext_append_bold(owl_fmtext *f, const char *text)
[5789230]107{
[8fa9562]108  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]109}
110
[b2b0773]111/* Append reverse video text 'text' to 'f' */
[e19eb97]112void owl_fmtext_append_reverse(owl_fmtext *f, const char *text)
[5789230]113{
[8fa9562]114  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]115}
116
[b2b0773]117/* Append reversed and bold, uncolored text 'text' to 'f' */
[e19eb97]118void owl_fmtext_append_reversebold(owl_fmtext *f, const char *text)
[5789230]119{
[8fa9562]120  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE | OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
[7d4fbcd]121}
122
[9866c3a]123/* Add the attribute 'attr' to the default atts for the text in 'f' */
124void owl_fmtext_addattr(owl_fmtext *f, char attr)
[5789230]125{
[7d4fbcd]126  /* add the attribute to all text */
[9866c3a]127  f->default_attrs |= attr;
[7d4fbcd]128}
129
[9866c3a]130/* Set the default foreground color for this fmtext to 'color'.
131 * Only affects text that is colored default.
[b2b0773]132 */
[5789230]133void owl_fmtext_colorize(owl_fmtext *f, int color)
134{
[9866c3a]135  f->default_fgcolor = color;
[8fa9562]136}
137
[9866c3a]138/* Set the default foreground color for this fmtext to 'color'.
139 * Only affects text that is colored default.
140 */
[8fa9562]141void owl_fmtext_colorizebg(owl_fmtext *f, int color)
142{
[9866c3a]143  f->default_bgcolor = color;
144}
[7d4fbcd]145
[9866c3a]146/* Internal function. Parse attrbute character. */
[e9c6fc8]147static void _owl_fmtext_update_attributes(gunichar c, char *attr, short *fgcolor, short *bgcolor)
[9866c3a]148{
149  if ((c & OWL_FMTEXT_UC_ATTR) == OWL_FMTEXT_UC_ATTR) {
150    *attr = c & OWL_FMTEXT_UC_ATTR_MASK;
151  }
[6f6330b]152  else if ((c & OWL_FMTEXT_UC_COLOR_BASE) == OWL_FMTEXT_UC_COLOR_BASE) {
153    if ((c & OWL_FMTEXT_UC_BGCOLOR) == OWL_FMTEXT_UC_BGCOLOR) {
154      *bgcolor = (c == OWL_FMTEXT_UC_BGDEFAULT
155                  ? OWL_COLOR_DEFAULT
156                  : c & OWL_FMTEXT_UC_COLOR_MASK);
157    }
158    else if ((c & OWL_FMTEXT_UC_FGCOLOR) == OWL_FMTEXT_UC_FGCOLOR) {
159      *fgcolor = (c == OWL_FMTEXT_UC_FGDEFAULT
160                  ? OWL_COLOR_DEFAULT
161                  : c & OWL_FMTEXT_UC_COLOR_MASK);
162    }
[7d4fbcd]163  }
164}
165
[9866c3a]166/* Internal function. Scan for attribute characters. */
[e9c6fc8]167static void _owl_fmtext_scan_attributes(const owl_fmtext *f, int start, char *attr, short *fgcolor, short *bgcolor)
[9866c3a]168{
[e19eb97]169  const char *p;
[9866c3a]170  p = strchr(f->textbuff, OWL_FMTEXT_UC_STARTBYTE_UTF8);
171  while (p && p < f->textbuff + start) {
172    _owl_fmtext_update_attributes(g_utf8_get_char(p), attr, fgcolor, bgcolor);
173    p = strchr(p+1, OWL_FMTEXT_UC_STARTBYTE_UTF8);
174  }
175} 
176
[b2b0773]177/* Internal function.  Append text from 'in' between index 'start' and
[db1af5fa]178 * 'stop', inclusive, to the end of 'f'. This function works with
179 * bytes.
[b2b0773]180 */
[e9c6fc8]181static void _owl_fmtext_append_fmtext(owl_fmtext *f, const owl_fmtext *in, int start, int stop)
[9866c3a]182{
183  char attrbuff[6];
184  int newlen, a = 0, fg = 0, bg = 0;
185  char attr = 0;
186  short fgcolor = OWL_COLOR_DEFAULT;
187  short bgcolor = OWL_COLOR_DEFAULT;
188
189  _owl_fmtext_scan_attributes(in, start, &attr, &fgcolor, &bgcolor);
190  if (attr != OWL_FMTEXT_ATTR_NONE) a=1;
191  if (fgcolor != OWL_COLOR_DEFAULT) fg=1;
192  if (bgcolor != OWL_COLOR_DEFAULT) bg=1;
193
194  /* We will reset to defaults after appending the text. We may need
195     to set initial attributes. */
196  newlen=strlen(f->textbuff)+(stop-start+1) + (4 * (a + fg + bg)) + 12;
[a387d12e]197  _owl_fmtext_realloc(f, newlen);
[7d4fbcd]198
[6c171f1]199  if (a)
200    strncat(f->textbuff, attrbuff,
201            g_unichar_to_utf8(OWL_FMTEXT_UC_ATTR | attr, attrbuff));
202  if (fg)
203    strncat(f->textbuff, attrbuff,
204            g_unichar_to_utf8(OWL_FMTEXT_UC_FGCOLOR | fgcolor, attrbuff));
205  if (bg)
206    strncat(f->textbuff, attrbuff,
207            g_unichar_to_utf8(OWL_FMTEXT_UC_BGCOLOR | bgcolor, attrbuff));
[9866c3a]208
[7d4fbcd]209  strncat(f->textbuff, in->textbuff+start, stop-start+1);
[9866c3a]210
211  /* Reset attributes */
212  strcat(f->textbuff, OWL_FMTEXT_UTF8_BGDEFAULT);
213  strcat(f->textbuff, OWL_FMTEXT_UTF8_FGDEFAULT);
214  strcat(f->textbuff, OWL_FMTEXT_UTF8_ATTR_NONE);
215
[7d4fbcd]216  f->textbuff[newlen]='\0';
217  f->textlen=newlen;
218}
219
[b2b0773]220/* append fmtext 'in' to 'f' */
[075ba92]221void owl_fmtext_append_fmtext(owl_fmtext *f, const owl_fmtext *in)
[5789230]222{
223  _owl_fmtext_append_fmtext(f, in, 0, in->textlen);
224
225}
226
[b2b0773]227/* Append 'nspaces' number of spaces to the end of 'f' */
[5789230]228void owl_fmtext_append_spaces(owl_fmtext *f, int nspaces)
229{
[7d4fbcd]230  int i;
231  for (i=0; i<nspaces; i++) {
232    owl_fmtext_append_normal(f, " ");
233  }
234}
235
[b2b0773]236/* Return a plain version of the fmtext.  Caller is responsible for
237 * freeing the return
238 */
[075ba92]239char *owl_fmtext_print_plain(const owl_fmtext *f)
[5789230]240{
[5376a95]241  return owl_strip_format_chars(f->textbuff);
[e1c4636]242}
243
[e9c6fc8]244static void _owl_fmtext_wattrset(WINDOW *w, int attrs)
[9866c3a]245{
246  wattrset(w, A_NORMAL);
247  if (attrs & OWL_FMTEXT_ATTR_BOLD) wattron(w, A_BOLD);
248  if (attrs & OWL_FMTEXT_ATTR_REVERSE) wattron(w, A_REVERSE);
249  if (attrs & OWL_FMTEXT_ATTR_UNDERLINE) wattron(w, A_UNDERLINE);
250}
[16c6cca]251
[e9c6fc8]252static void _owl_fmtext_update_colorpair(short fg, short bg, short *pair)
[16c6cca]253{
254  if (owl_global_get_hascolors(&g)) {
255    *pair = owl_fmtext_get_colorpair(fg, bg);
256  }
257}
258
[e9c6fc8]259static void _owl_fmtext_wcolor_set(WINDOW *w, short pair)
[16c6cca]260{
261  if (owl_global_get_hascolors(&g)) {
262      wcolor_set(w,pair,NULL);
[39cff48]263      wbkgdset(w, COLOR_PAIR(pair));
[16c6cca]264  }
265}
266
[b2b0773]267/* add the formatted text to the curses window 'w'.  The window 'w'
268 * must already be initiatlized with curses
269 */
[e9c6fc8]270static void _owl_fmtext_curs_waddstr(const owl_fmtext *f, WINDOW *w, int do_search)
[9866c3a]271{
272  /* char *tmpbuff; */
273  /* int position, trans1, trans2, trans3, len, lastsame; */
274  char *s, *p;
275  char attr;
[18fb86ee]276  short fg, bg, pair = 0;
[9866c3a]277 
[f2f9314]278  if (w==NULL) {
279    owl_function_debugmsg("Hit a null window in owl_fmtext_curs_waddstr.");
280    return;
281  }
282
[9866c3a]283  s = f->textbuff;
284  /* Set default attributes. */
285  attr = f->default_attrs;
286  fg = f->default_fgcolor;
287  bg = f->default_bgcolor;
288  _owl_fmtext_wattrset(w, attr);
[16c6cca]289  _owl_fmtext_update_colorpair(fg, bg, &pair);
290  _owl_fmtext_wcolor_set(w, pair);
[7d4fbcd]291
[9866c3a]292  /* Find next possible format character. */
293  p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
294  while(p) {
[c1522ec]295    if (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
[9866c3a]296      /* Deal with all text from last insert to here. */
297      char tmp;
298   
299      tmp = p[0];
300      p[0] = '\0';
[41c9a96]301      if (owl_global_is_search_active(&g)) {
[9866c3a]302        /* Search is active, so highlight search results. */
[41c9a96]303        char tmp2;
304        int start, end;
305        while (owl_regex_compare(owl_global_get_search_re(&g), s, &start, &end) == 0) {
[0ed5c57]306          /* Prevent an infinite loop matching the empty string. */
307          if (end == 0)
308            break;
309
[9866c3a]310          /* Found search string, highlight it. */
311
[41c9a96]312          tmp2 = s[start];
313          s[start] = '\0';
[9866c3a]314          waddstr(w, s);
[41c9a96]315          s[start] = tmp2;
[9866c3a]316
[987a93c]317          _owl_fmtext_wattrset(w, attr ^ OWL_FMTEXT_ATTR_REVERSE);
[16c6cca]318          _owl_fmtext_wcolor_set(w, pair);
319         
[41c9a96]320          tmp2 = s[end];
321          s[end] = '\0';
322          waddstr(w, s + start);
323          s[end] = tmp2;
[9866c3a]324
[16c6cca]325          _owl_fmtext_wattrset(w, attr);
326          _owl_fmtext_wcolor_set(w, pair);
[9866c3a]327
[41c9a96]328          s += end;
[9866c3a]329        }
330      }
331      /* Deal with remaining part of string. */
332      waddstr(w, s);
333      p[0] = tmp;
334
335      /* Deal with new attributes. Initialize to defaults, then
336         process all consecutive formatting characters. */
337      attr = f->default_attrs;
338      fg = f->default_fgcolor;
339      bg = f->default_bgcolor;
[f119757]340      while (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
[9866c3a]341        _owl_fmtext_update_attributes(g_utf8_get_char(p), &attr, &fg, &bg);
342        p = g_utf8_next_char(p);
[7d4fbcd]343      }
[9866c3a]344      _owl_fmtext_wattrset(w, attr | f->default_attrs);
[16c6cca]345      if (fg == OWL_COLOR_DEFAULT) fg = f->default_fgcolor;
346      if (bg == OWL_COLOR_DEFAULT) bg = f->default_bgcolor;
347      _owl_fmtext_update_colorpair(fg, bg, &pair);
348      _owl_fmtext_wcolor_set(w, pair);
349
[9866c3a]350      /* Advance to next non-formatting character. */
351      s = p;
352      p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
353    }
354    else {
355      p = strchr(p+1, OWL_FMTEXT_UC_STARTBYTE_UTF8);
[7d4fbcd]356    }
357  }
[9866c3a]358  if (s) {
359    waddstr(w, s);
360  }
[39cff48]361  wbkgdset(w, 0);
[7d4fbcd]362}
363
[075ba92]364void owl_fmtext_curs_waddstr(const owl_fmtext *f, WINDOW *w)
[47519e1b]365{
366  _owl_fmtext_curs_waddstr(f, w, owl_global_is_search_active(&g));
367}
368
[075ba92]369void owl_fmtext_curs_waddstr_without_search(const owl_fmtext *f, WINDOW *w)
[47519e1b]370{
371  _owl_fmtext_curs_waddstr(f, w, 0);
372}
[7d4fbcd]373
[b2b0773]374/* start with line 'aline' (where the first line is 0) and print
375 * 'lines' number of lines into 'out'
376 */
[075ba92]377int owl_fmtext_truncate_lines(const owl_fmtext *in, int aline, int lines, owl_fmtext *out)
[5789230]378{
[e19eb97]379  const char *ptr1, *ptr2;
[7d4fbcd]380  int i, offset;
381 
382  /* find the starting line */
[9866c3a]383  ptr1 = in->textbuff;
384  for (i = 0; i < aline; i++) {
385    ptr1 = strchr(ptr1, '\n');
386    if (!ptr1) return(-1);
387    ptr1++;
[7d4fbcd]388  }
[9866c3a]389 
[7d4fbcd]390  /* ptr1 now holds the starting point */
391
[c55ad84]392  /* copy the default attributes */
393  out->default_attrs = in->default_attrs;
394  out->default_fgcolor = in->default_fgcolor;
395  out->default_bgcolor = in->default_bgcolor;
396   
[7d4fbcd]397  /* copy in the next 'lines' lines */
[9866c3a]398  if (lines < 1) return(-1);
[7d4fbcd]399
[9866c3a]400  for (i = 0; i < lines; i++) {
401    offset = ptr1 - in->textbuff;
402    ptr2 = strchr(ptr1, '\n');
[7d4fbcd]403    if (!ptr2) {
[9866c3a]404      _owl_fmtext_append_fmtext(out, in, offset, (in->textlen) - 1);
[7d4fbcd]405      return(-1);
406    }
[9866c3a]407    _owl_fmtext_append_fmtext(out, in, offset, (ptr2 - ptr1) + offset);
408    ptr1 = ptr2 + 1;
[7d4fbcd]409  }
410  return(0);
411}
412
[b2b0773]413/* Truncate the message so that each line begins at column 'acol' and
414 * ends at 'bcol' or sooner.  The first column is number 0.  The new
[dd6af02]415 * message is placed in 'out'.  The message is expected to end in a
416 * new line for now.
[7b4d90e]417 *
418 * NOTE: This needs to be modified to deal with backing up if we find
[fb2f9ab]419 * a SPACING COMBINING MARK at the end of a line. If that happens, we
420 * should back up to the last non-mark character and stop there.
[7b4d90e]421 *
422 * NOTE: If a line ends at bcol, we omit the newline. This is so printing
423 * to ncurses works.
[b2b0773]424 */
[075ba92]425void owl_fmtext_truncate_cols(const owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
[5789230]426{
[e19eb97]427  const char *ptr_s, *ptr_e, *ptr_c, *last;
[9866c3a]428  int col, st, padding, chwidth;
[7d4fbcd]429
[c55ad84]430  /* copy the default attributes */
431  out->default_attrs = in->default_attrs;
432  out->default_fgcolor = in->default_fgcolor;
433  out->default_bgcolor = in->default_bgcolor;
434
[7d4fbcd]435  last=in->textbuff+in->textlen-1;
[28ee32b]436  ptr_s=in->textbuff;
[9866c3a]437  while (ptr_s <= last) {
[28ee32b]438    ptr_e=strchr(ptr_s, '\n');
439    if (!ptr_e) {
[dd6af02]440      /* but this shouldn't happen if we end in a \n */
441      break;
[7d4fbcd]442    }
443   
[9866c3a]444    if (ptr_e == ptr_s) {
[7d4fbcd]445      owl_fmtext_append_normal(out, "\n");
[9866c3a]446      ++ptr_s;
[7d4fbcd]447      continue;
448    }
449
[28ee32b]450    col = 0;
[9866c3a]451    st = 0;
[dd24b6a]452    padding = 0;
[47519e1b]453    chwidth = 0;
[28ee32b]454    ptr_c = ptr_s;
[3a7cf49]455    while(ptr_c < ptr_e) {
[28ee32b]456      gunichar c = g_utf8_get_char(ptr_c);
[c1522ec]457      if (!owl_fmtext_is_format_char(c)) {
[47519e1b]458        chwidth = mk_wcwidth(c);
[3a7cf49]459        if (col + chwidth > bcol) break;
460       
[9866c3a]461        if (col >= acol) {
462          if (st == 0) {
463            ptr_s = ptr_c;
464            padding = col - acol;
465            ++st;
466          }
[dd24b6a]467        }
[9866c3a]468        col += chwidth;
469        chwidth = 0;
[28ee32b]470      }
[9866c3a]471      ptr_c = g_utf8_next_char(ptr_c);
[dd24b6a]472    }
[9866c3a]473    if (st) {
474      /* lead padding */
475      owl_fmtext_append_spaces(out, padding);
[3a7cf49]476      if (ptr_c == ptr_e) {
477        /* We made it to the newline. */
478        _owl_fmtext_append_fmtext(out, in, ptr_s - in->textbuff, ptr_c - in->textbuff);
[9866c3a]479      }
[db1af5fa]480      else if (chwidth > 1) {
481        /* Last char is wide, truncate. */
482        _owl_fmtext_append_fmtext(out, in, ptr_s - in->textbuff, ptr_c - in->textbuff - 1);
483        owl_fmtext_append_normal(out, "\n");
484      }
[9866c3a]485      else {
[db1af5fa]486        /* Last char fits perfectly, We skip to the next char and back
487         * up a byte to make sure we get it all.
488         */
489        ptr_c = g_utf8_next_char(ptr_c);
490        _owl_fmtext_append_fmtext(out, in, ptr_s - in->textbuff, ptr_c - in->textbuff - 1);
[28ee32b]491      }
[dd24b6a]492    }
493    else {
494      owl_fmtext_append_normal(out, "\n");
[28ee32b]495    }
[dd6af02]496    ptr_s = g_utf8_next_char(ptr_e);
[7d4fbcd]497  }
498}
499
[b2b0773]500/* Return the number of lines in 'f' */
[075ba92]501int owl_fmtext_num_lines(const owl_fmtext *f)
[5789230]502{
[7d4fbcd]503  int lines, i;
504
[af2ca19]505  if (f->textlen==0) return(0);
506 
[7d4fbcd]507  lines=0;
[af2ca19]508  for (i=0; i<f->textlen; i++) {
[7d4fbcd]509    if (f->textbuff[i]=='\n') lines++;
510  }
511
512  /* if the last char wasn't a \n there's one more line */
513  if (f->textbuff[i-1]!='\n') lines++;
514
515  return(lines);
516}
517
[075ba92]518const char *owl_fmtext_get_text(const owl_fmtext *f)
[5789230]519{
[7d4fbcd]520  return(f->textbuff);
521}
522
[6772d19]523int owl_fmtext_num_bytes(const owl_fmtext *f)
524{
525  return(f->textlen);
526}
527
[a0a5179]528/* set the charater at 'index' to be 'char'.  If index is out of
[9866c3a]529 * bounds don't do anything. If c or char at index is not ASCII, don't
530 * do anything because it's not UTF-8 safe. */
531void owl_fmtext_set_char(owl_fmtext *f, int index, char ch)
[5789230]532{
[4b464a4]533  if ((index < 0) || (index > f->textlen-1)) return;
[9866c3a]534  /* NOT ASCII*/
535  if (f->textbuff[index] & 0x80 || ch & 0x80) return; 
[4b464a4]536  f->textbuff[index]=ch;
537}
538
[b2b0773]539/* Make a copy of the fmtext 'src' into 'dst' */
[075ba92]540void owl_fmtext_copy(owl_fmtext *dst, const owl_fmtext *src)
[5789230]541{
[b2b0773]542  int mallocsize;
543
544  if (src->textlen==0) {
545    mallocsize=5;
546  } else {
547    mallocsize=src->textlen+2;
548  }
[7d4fbcd]549  dst->textlen=src->textlen;
[005fc22]550  dst->bufflen=mallocsize;
[bd3f232]551  dst->textbuff=owl_malloc(mallocsize);
[6bf73ce]552  memcpy(dst->textbuff, src->textbuff, src->textlen+1);
[9866c3a]553  dst->default_attrs = src->default_attrs;
554  dst->default_fgcolor = src->default_fgcolor;
555  dst->default_bgcolor = src->default_bgcolor;
[1fd0b25]556}
557
[b2b0773]558/* return 1 if the string is found, 0 if not.  This is a case
559 *  insensitive search.
[5789230]560 */
[89b2daf]561int owl_fmtext_search(const owl_fmtext *f, const owl_regex *re)
[5789230]562{
[41c9a96]563  if (owl_regex_compare(re, f->textbuff, NULL, NULL) == 0) return(1);
[1fd0b25]564  return(0);
565}
[12c35df]566
567
568/* Append the text 'text' to 'f' and interpret the zephyr style
569 * formatting syntax to set appropriate attributes.
570 */
[e19eb97]571void owl_fmtext_append_ztext(owl_fmtext *f, const char *text)
[12c35df]572{
573  int stacksize, curattrs, curcolor;
[e19eb97]574  const char *ptr, *txtptr, *tmpptr;
[65b2173]575  char *buff;
[d754b0a]576  int attrstack[32], chrstack[32], colorstack[32];
[12c35df]577
578  curattrs=OWL_FMTEXT_ATTR_NONE;
579  curcolor=OWL_COLOR_DEFAULT;
580  stacksize=0;
581  txtptr=text;
582  while (1) {
583    ptr=strpbrk(txtptr, "@{[<()>]}");
584    if (!ptr) {
585      /* add all the rest of the text and exit */
[8fa9562]586      owl_fmtext_append_attr(f, txtptr, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]587      return;
588    } else if (ptr[0]=='@') {
589      /* add the text up to this point then deal with the stack */
590      buff=owl_malloc(ptr-txtptr+20);
591      strncpy(buff, txtptr, ptr-txtptr);
592      buff[ptr-txtptr]='\0';
[8fa9562]593      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]594      owl_free(buff);
595
596      /* update pointer to point at the @ */
597      txtptr=ptr;
598
599      /* now the stack */
600
601      /* if we've hit our max stack depth, print the @ and move on */
602      if (stacksize==32) {
[1bdffcb]603        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
604        txtptr++;
605        continue;
[12c35df]606      }
607
608      /* if it's an @@, print an @ and continue */
609      if (txtptr[1]=='@') {
[1bdffcb]610        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
611        txtptr+=2;
612        continue;
[12c35df]613      }
[1bdffcb]614       
[12c35df]615      /* if there's no opener, print the @ and continue */
616      tmpptr=strpbrk(txtptr, "(<[{ ");
617      if (!tmpptr || tmpptr[0]==' ') {
[1bdffcb]618        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
619        txtptr++;
620        continue;
[12c35df]621      }
622
623      /* check what command we've got, push it on the stack, start
[1bdffcb]624         using it, and continue ... unless it's a color command */
[12c35df]625      buff=owl_malloc(tmpptr-ptr+20);
626      strncpy(buff, ptr, tmpptr-ptr);
627      buff[tmpptr-ptr]='\0';
628      if (!strcasecmp(buff, "@bold")) {
[1bdffcb]629        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
630        chrstack[stacksize]=tmpptr[0];
[d754b0a]631        colorstack[stacksize]=curcolor;
[1bdffcb]632        stacksize++;
633        curattrs|=OWL_FMTEXT_ATTR_BOLD;
634        txtptr+=6;
635        owl_free(buff);
636        continue;
[12c35df]637      } else if (!strcasecmp(buff, "@b")) {
[1bdffcb]638        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
639        chrstack[stacksize]=tmpptr[0];
[d754b0a]640        colorstack[stacksize]=curcolor;
[1bdffcb]641        stacksize++;
642        curattrs|=OWL_FMTEXT_ATTR_BOLD;
643        txtptr+=3;
644        owl_free(buff);
645        continue;
[12c35df]646      } else if (!strcasecmp(buff, "@i")) {
[1bdffcb]647        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
648        chrstack[stacksize]=tmpptr[0];
[d754b0a]649        colorstack[stacksize]=curcolor;
[1bdffcb]650        stacksize++;
651        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
652        txtptr+=3;
653        owl_free(buff);
654        continue;
[12c35df]655      } else if (!strcasecmp(buff, "@italic")) {
[1bdffcb]656        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
657        chrstack[stacksize]=tmpptr[0];
[d754b0a]658        colorstack[stacksize]=curcolor;
[1bdffcb]659        stacksize++;
660        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
661        txtptr+=8;
662        owl_free(buff);
663        continue;
[d754b0a]664      } else if (!strcasecmp(buff, "@")) {
665        attrstack[stacksize]=OWL_FMTEXT_ATTR_NONE;
666        chrstack[stacksize]=tmpptr[0];
667        colorstack[stacksize]=curcolor;
668        stacksize++;
669        txtptr+=2;
670        owl_free(buff);
671        continue;
[1bdffcb]672
673        /* if it's a color read the color, set the current color and
[12c35df]674           continue */
675      } else if (!strcasecmp(buff, "@color") 
[1bdffcb]676                 && owl_global_get_hascolors(&g)
677                 && owl_global_is_colorztext(&g)) {
678        owl_free(buff);
679        txtptr+=7;
680        tmpptr=strpbrk(txtptr, "@{[<()>]}");
681        if (tmpptr &&
682            ((txtptr[-1]=='(' && tmpptr[0]==')') ||
683             (txtptr[-1]=='<' && tmpptr[0]=='>') ||
684             (txtptr[-1]=='[' && tmpptr[0]==']') ||
685             (txtptr[-1]=='{' && tmpptr[0]=='}'))) {
686
687          /* grab the color name */
688          buff=owl_malloc(tmpptr-txtptr+20);
689          strncpy(buff, txtptr, tmpptr-txtptr);
690          buff[tmpptr-txtptr]='\0';
691
692          /* set it as the current color */
693          curcolor=owl_util_string_to_color(buff);
[1ee5c79]694          if (curcolor == OWL_COLOR_INVALID)
695              curcolor = OWL_COLOR_DEFAULT;
[1bdffcb]696          owl_free(buff);
697          txtptr=tmpptr+1;
698          continue;
699
700        } else {
701
702        }
[12c35df]703
704      } else {
[1bdffcb]705        /* if we didn't understand it, we'll print it.  This is different from zwgc
706         * but zwgc seems to be smarter about some screw cases than I am
707         */
708        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
709        txtptr++;
710        continue;
[12c35df]711      }
712
713    } else if (ptr[0]=='}' || ptr[0]==']' || ptr[0]==')' || ptr[0]=='>') {
714      /* add the text up to this point first */
715      buff=owl_malloc(ptr-txtptr+20);
716      strncpy(buff, txtptr, ptr-txtptr);
717      buff[ptr-txtptr]='\0';
[8fa9562]718      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]719      owl_free(buff);
720
721      /* now deal with the closer */
722      txtptr=ptr;
723
724      /* first, if the stack is empty we must bail (just print and go) */
725      if (stacksize==0) {
[1bdffcb]726        buff=owl_malloc(5);
727        buff[0]=ptr[0];
728        buff[1]='\0';
729        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
730        owl_free(buff);
731        txtptr++;
732        continue;
[12c35df]733      }
734
735      /* if the closing char is what's on the stack, turn off the
736         attribue and pop the stack */
737      if ((ptr[0]==')' && chrstack[stacksize-1]=='(') ||
[1bdffcb]738          (ptr[0]=='>' && chrstack[stacksize-1]=='<') ||
739          (ptr[0]==']' && chrstack[stacksize-1]=='[') ||
740          (ptr[0]=='}' && chrstack[stacksize-1]=='{')) {
741        int i;
742        stacksize--;
743        curattrs=OWL_FMTEXT_ATTR_NONE;
[d754b0a]744        curcolor = colorstack[stacksize];
[1bdffcb]745        for (i=0; i<stacksize; i++) {
746          curattrs|=attrstack[i];
747        }
748        txtptr+=1;
749        continue;
[12c35df]750      } else {
[1bdffcb]751        /* otherwise print and continue */
752        buff=owl_malloc(5);
753        buff[0]=ptr[0];
754        buff[1]='\0';
755        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
756        owl_free(buff);
757        txtptr++;
758        continue;
[12c35df]759      }
760    } else {
761      /* we've found an unattached opener, print everything and move on */
762      buff=owl_malloc(ptr-txtptr+20);
763      strncpy(buff, txtptr, ptr-txtptr+1);
764      buff[ptr-txtptr+1]='\0';
[8fa9562]765      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]766      owl_free(buff);
767      txtptr=ptr+1;
768      continue;
769    }
770  }
771}
[a0a5179]772
773/* requires that the list values are strings or NULL.
774 * joins the elements together with join_with.
775 * If format_fn is specified, passes it the list element value
776 * and it will return a string which this needs to free. */
[77bced3]777void owl_fmtext_append_list(owl_fmtext *f, const owl_list *l, const char *join_with, char *(format_fn)(const char *))
[a0a5179]778{
779  int i, size;
[e19eb97]780  const char *elem;
[a0a5179]781  char *text;
782
783  size = owl_list_get_size(l);
784  for (i=0; i<size; i++) {
[4d86e06]785    elem = owl_list_get_element(l,i);
[a0a5179]786    if (elem && format_fn) {
787      text = format_fn(elem);
788      if (text) {
[1bdffcb]789        owl_fmtext_append_normal(f, text);
790        owl_free(text);
[a0a5179]791      }
792    } else if (elem) {
793      owl_fmtext_append_normal(f, elem);
794    }
795    if ((i < size-1) && join_with) {
796      owl_fmtext_append_normal(f, join_with);
797    }
798  }
799}
800
801/* Free all memory allocated by the object */
[7ab0020]802void owl_fmtext_cleanup(owl_fmtext *f)
[a0a5179]803{
804  if (f->textbuff) owl_free(f->textbuff);
[8fa9562]805}
806
807/*** Color Pair manager ***/
808void owl_fmtext_init_colorpair_mgr(owl_colorpair_mgr *cpmgr)
809{
[af1920fd]810  /* This could be a bitarray if we wanted to save memory. */
[c2c5c77]811  short i, j;
812  cpmgr->next = 8;
813 
[af1920fd]814  /* The test is <= because we allocate COLORS+1 entries. */
[c2c5c77]815  cpmgr->pairs = owl_malloc((COLORS+1) * sizeof(short*));
816  for(i = 0; i <= COLORS; i++) {
817    cpmgr->pairs[i] = owl_malloc((COLORS+1) * sizeof(short));
818    for(j = 0; j <= COLORS; j++) {
[8fa9562]819      cpmgr->pairs[i][j] = -1;
820    }
821  }
[fa3290d]822  if (owl_global_get_hascolors(&g)) {
823    for(i = 0; i < 8; i++) {
824      short fg, bg;
825      if (i >= COLORS) continue;
826      pair_content(i, &fg, &bg);
827      cpmgr->pairs[fg+1][bg+1] = i;
828    }
[c2c5c77]829  }
[a0a5179]830}
831
[8fa9562]832/* Reset used list */
[c79a047]833void owl_fmtext_reset_colorpairs(void)
[8fa9562]834{
[fa3290d]835  if (owl_global_get_hascolors(&g)) {
836    short i, j;
837    owl_colorpair_mgr *cpmgr = owl_global_get_colorpair_mgr(&g);
838    cpmgr->next = 8;
839   
[af1920fd]840    /* The test is <= because we allocated COLORS+1 entries. */
[fa3290d]841    for(i = 0; i <= COLORS; i++) {
842      for(j = 0; j <= COLORS; j++) {
843        cpmgr->pairs[i][j] = -1;
844      }
845    }
846    for(i = 0; i < 8; i++) {
847      short fg, bg;
848      if (i >= COLORS) continue;
849      pair_content(i, &fg, &bg);
850      cpmgr->pairs[fg+1][bg+1] = i;
[eeeef20]851    }
[c2c5c77]852  }
[8fa9562]853}
854
855/* Assign pairs by request */
[1bdffcb]856short owl_fmtext_get_colorpair(int fg, int bg)
[8fa9562]857{
858  owl_colorpair_mgr *cpmgr;
[423adcb]859  short pair;
[1bdffcb]860
[1b737a1]861  /* Sanity (Bounds) Check */
862  if (fg > COLORS || fg < OWL_COLOR_DEFAULT) fg = OWL_COLOR_DEFAULT;
863  if (bg > COLORS || bg < OWL_COLOR_DEFAULT) bg = OWL_COLOR_DEFAULT;
864           
[1bdffcb]865#ifdef HAVE_USE_DEFAULT_COLORS
[8fa9562]866  if (fg == OWL_COLOR_DEFAULT) fg = -1;
[1bdffcb]867#else
868  if (fg == OWL_COLOR_DEFAULT) fg = 0;
869  if (bg == OWL_COLOR_DEFAULT) bg = 0;
870#endif
871
[af1920fd]872  /* looking for a pair we already set up for this draw. */
[c2c5c77]873  cpmgr = owl_global_get_colorpair_mgr(&g);
874  pair = cpmgr->pairs[fg+1][bg+1];
875  if (!(pair != -1 && pair < cpmgr->next)) {
[af1920fd]876    /* If we didn't find a pair, search for a free one to assign. */
[c2c5c77]877    pair = (cpmgr->next < COLOR_PAIRS) ? cpmgr->next : -1;
878    if (pair != -1) {
[af1920fd]879      /* We found a free pair, initialize it. */
[c2c5c77]880      init_pair(pair, fg, bg);
881      cpmgr->pairs[fg+1][bg+1] = pair;
882      cpmgr->next++;
883    }
884    else if (bg != OWL_COLOR_DEFAULT) {
[af1920fd]885      /* We still don't have a pair, drop the background color. Too bad. */
[c2c5c77]886      owl_function_debugmsg("colorpairs: color shortage - dropping background color.");
887      pair = owl_fmtext_get_colorpair(fg, OWL_COLOR_DEFAULT);
888    }
889    else {
[af1920fd]890      /* We still don't have a pair, defaults all around. */
[c2c5c77]891      owl_function_debugmsg("colorpairs: color shortage - dropping foreground and background color.");
892      pair = 0;
[8fa9562]893    }
894  }
895  return pair;
896}
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