source: fmtext.c @ 7ba2ad4

release-1.7release-1.8release-1.9
Last change on this file since 7ba2ad4 was 7ba2ad4, checked in by David Benjamin <davidben@mit.edu>, 11 years ago
Implement owl_fmtext_line_extents and add test case
  • Property mode set to 100644
File size: 29.1 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
[e0e0e5a]177/* Internal function.  Append text from 'in' between index 'start'
178 * inclusive and 'stop' exclusive, to the end of 'f'. This function
179 * works with 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. */
[e0e0e5a]196  newlen=strlen(f->textbuff)+(stop-start) + (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
[e0e0e5a]209  strncat(f->textbuff, in->textbuff+start, stop-start);
[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';
[449c682]301      if (do_search && 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{
[449c682]366  _owl_fmtext_curs_waddstr(f, w, 1);
[47519e1b]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
[2b83ad6]374/* Expands tabs. Tabs are expanded as if given an initial indent of start. */
375void owl_fmtext_expand_tabs(const owl_fmtext *in, owl_fmtext *out, int start) {
376  int col = start, numcopied = 0;
377  char *ptr;
378
379  /* Copy the default attributes. */
380  out->default_attrs = in->default_attrs;
381  out->default_fgcolor = in->default_fgcolor;
382  out->default_bgcolor = in->default_bgcolor;
383
384  for (ptr = in->textbuff;
385       ptr < in->textbuff + in->textlen;
386       ptr = g_utf8_next_char(ptr)) {
387    gunichar c = g_utf8_get_char(ptr);
388    int chwidth;
389    if (c == '\t') {
390      /* Copy up to this tab */
[30da473]391      _owl_fmtext_append_fmtext(out, in, numcopied, ptr - in->textbuff);
[2b83ad6]392      /* and then copy spaces for the tab. */
393      chwidth = OWL_TAB_WIDTH - (col % OWL_TAB_WIDTH);
394      owl_fmtext_append_spaces(out, chwidth);
395      col += chwidth;
396      numcopied = g_utf8_next_char(ptr) - in->textbuff;
397    } else {
398      /* Just update col. We'll append later. */
399      if (c == '\n') {
400        col = start;
401      } else if (!owl_fmtext_is_format_char(c)) {
402        col += mk_wcwidth(c);
403      }
404    }
405  }
406  /* Append anything we've missed. */
407  if (numcopied < in->textlen)
[30da473]408    _owl_fmtext_append_fmtext(out, in, numcopied, in->textlen);
[2b83ad6]409}
410
[b2b0773]411/* start with line 'aline' (where the first line is 0) and print
412 * 'lines' number of lines into 'out'
413 */
[075ba92]414int owl_fmtext_truncate_lines(const owl_fmtext *in, int aline, int lines, owl_fmtext *out)
[5789230]415{
[e19eb97]416  const char *ptr1, *ptr2;
[7d4fbcd]417  int i, offset;
418 
419  /* find the starting line */
[9866c3a]420  ptr1 = in->textbuff;
421  for (i = 0; i < aline; i++) {
422    ptr1 = strchr(ptr1, '\n');
423    if (!ptr1) return(-1);
424    ptr1++;
[7d4fbcd]425  }
[9866c3a]426 
[7d4fbcd]427  /* ptr1 now holds the starting point */
428
[c55ad84]429  /* copy the default attributes */
430  out->default_attrs = in->default_attrs;
431  out->default_fgcolor = in->default_fgcolor;
432  out->default_bgcolor = in->default_bgcolor;
433   
[7d4fbcd]434  /* copy in the next 'lines' lines */
[9866c3a]435  if (lines < 1) return(-1);
[7d4fbcd]436
[9866c3a]437  for (i = 0; i < lines; i++) {
438    offset = ptr1 - in->textbuff;
439    ptr2 = strchr(ptr1, '\n');
[7d4fbcd]440    if (!ptr2) {
[e0e0e5a]441      /* Copy to the end of the buffer. */
442      _owl_fmtext_append_fmtext(out, in, offset, in->textlen);
[7d4fbcd]443      return(-1);
444    }
[e0e0e5a]445    /* Copy up to, and including, the new line. */
446    _owl_fmtext_append_fmtext(out, in, offset, (ptr2 - ptr1) + offset + 1);
[9866c3a]447    ptr1 = ptr2 + 1;
[7d4fbcd]448  }
449  return(0);
450}
451
[e0022d2]452/* Implementation of owl_fmtext_truncate_cols. Does not support tabs in input. */
453void _owl_fmtext_truncate_cols_internal(const owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
[5789230]454{
[e19eb97]455  const char *ptr_s, *ptr_e, *ptr_c, *last;
[9866c3a]456  int col, st, padding, chwidth;
[7d4fbcd]457
[c55ad84]458  /* copy the default attributes */
459  out->default_attrs = in->default_attrs;
460  out->default_fgcolor = in->default_fgcolor;
461  out->default_bgcolor = in->default_bgcolor;
462
[7d4fbcd]463  last=in->textbuff+in->textlen-1;
[28ee32b]464  ptr_s=in->textbuff;
[9866c3a]465  while (ptr_s <= last) {
[28ee32b]466    ptr_e=strchr(ptr_s, '\n');
467    if (!ptr_e) {
[dd6af02]468      /* but this shouldn't happen if we end in a \n */
469      break;
[7d4fbcd]470    }
471   
[9866c3a]472    if (ptr_e == ptr_s) {
[7d4fbcd]473      owl_fmtext_append_normal(out, "\n");
[9866c3a]474      ++ptr_s;
[7d4fbcd]475      continue;
476    }
477
[28ee32b]478    col = 0;
[9866c3a]479    st = 0;
[dd24b6a]480    padding = 0;
[47519e1b]481    chwidth = 0;
[28ee32b]482    ptr_c = ptr_s;
[3a7cf49]483    while(ptr_c < ptr_e) {
[28ee32b]484      gunichar c = g_utf8_get_char(ptr_c);
[c1522ec]485      if (!owl_fmtext_is_format_char(c)) {
[47519e1b]486        chwidth = mk_wcwidth(c);
[3a7cf49]487        if (col + chwidth > bcol) break;
488       
[9866c3a]489        if (col >= acol) {
490          if (st == 0) {
491            ptr_s = ptr_c;
492            padding = col - acol;
493            ++st;
494          }
[dd24b6a]495        }
[9866c3a]496        col += chwidth;
497        chwidth = 0;
[28ee32b]498      }
[9866c3a]499      ptr_c = g_utf8_next_char(ptr_c);
[dd24b6a]500    }
[9866c3a]501    if (st) {
502      /* lead padding */
503      owl_fmtext_append_spaces(out, padding);
[3a7cf49]504      if (ptr_c == ptr_e) {
[e0e0e5a]505        /* We made it to the newline. Append up to, and including it. */
506        _owl_fmtext_append_fmtext(out, in, ptr_s - in->textbuff, ptr_c - in->textbuff + 1);
[9866c3a]507      }
[db1af5fa]508      else if (chwidth > 1) {
509        /* Last char is wide, truncate. */
[e0e0e5a]510        _owl_fmtext_append_fmtext(out, in, ptr_s - in->textbuff, ptr_c - in->textbuff);
[db1af5fa]511        owl_fmtext_append_normal(out, "\n");
512      }
[9866c3a]513      else {
[e0e0e5a]514        /* Last char fits perfectly, We stop at the next char to make
515         * sure we get it all. */
[db1af5fa]516        ptr_c = g_utf8_next_char(ptr_c);
[e0e0e5a]517        _owl_fmtext_append_fmtext(out, in, ptr_s - in->textbuff, ptr_c - in->textbuff);
[28ee32b]518      }
[dd24b6a]519    }
520    else {
521      owl_fmtext_append_normal(out, "\n");
[28ee32b]522    }
[dd6af02]523    ptr_s = g_utf8_next_char(ptr_e);
[7d4fbcd]524  }
525}
526
[e0022d2]527/* Truncate the message so that each line begins at column 'acol' and
528 * ends at 'bcol' or sooner.  The first column is number 0.  The new
529 * message is placed in 'out'.  The message is expected to end in a
530 * new line for now.
531 *
532 * NOTE: This needs to be modified to deal with backing up if we find
533 * a SPACING COMBINING MARK at the end of a line. If that happens, we
534 * should back up to the last non-mark character and stop there.
535 *
536 * NOTE: If a line ends at bcol, we omit the newline. This is so printing
537 * to ncurses works.
538 */
539void owl_fmtext_truncate_cols(const owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
540{
541  owl_fmtext notabs;
542
543  /* _owl_fmtext_truncate_cols_internal cannot handle tabs. */
544  if (strchr(in->textbuff, '\t')) {
545    owl_fmtext_init_null(&notabs);
546    owl_fmtext_expand_tabs(in, &notabs, 0);
547    _owl_fmtext_truncate_cols_internal(&notabs, acol, bcol, out);
548    owl_fmtext_cleanup(&notabs);
549  } else {
550    _owl_fmtext_truncate_cols_internal(in, acol, bcol, out);
551  }
552}
553
[b2b0773]554/* Return the number of lines in 'f' */
[075ba92]555int owl_fmtext_num_lines(const owl_fmtext *f)
[5789230]556{
[7d4fbcd]557  int lines, i;
[c93b8b5]558  char *lastbreak, *p;
[7d4fbcd]559
560  lines=0;
[c93b8b5]561  lastbreak = f->textbuff;
[af2ca19]562  for (i=0; i<f->textlen; i++) {
[c93b8b5]563    if (f->textbuff[i]=='\n') {
564      lastbreak = f->textbuff + i;
565      lines++;
566    }
[7d4fbcd]567  }
568
[c93b8b5]569  /* Check if there's a trailing line; formatting characters don't count. */
570  for (p = g_utf8_next_char(lastbreak);
571       p < f->textbuff + f->textlen;
572       p = g_utf8_next_char(p)) {
573    if (!owl_fmtext_is_format_char(g_utf8_get_char(p))) {
574      lines++;
575      break;
576    }
577  }
[7d4fbcd]578
579  return(lines);
580}
581
[f7456bc]582/* Returns the line number, starting at 0, of the character which
583 * contains the byte at 'offset'. Note that a trailing newline is part
584 * of the line it ends. Also, while a trailing line of formatting
585 * characters does not contribute to owl_fmtext_num_lines, those
586 * characters are considered on a new line. */
587int owl_fmtext_line_number(const owl_fmtext *f, int offset)
588{
589  int i, lineno = 0;
590  if (offset >= f->textlen)
591    offset = f->textlen - 1;
592  for (i = 0; i < offset; i++) {
593    if (f->textbuff[i] == '\n')
594      lineno++;
595  }
596  return lineno;
597}
598
[7ba2ad4]599/* Searches for line 'lineno' in 'f'. The returned range, [start,
600 * end), forms a half-open interval for the extent of the line. */
601void owl_fmtext_line_extents(const owl_fmtext *f, int lineno, int *o_start, int *o_end)
602{
603  int start, end;
604  char *newline;
605  for (start = 0; lineno > 0 && start < f->textlen; start++) {
606    if (f->textbuff[start] == '\n')
607      lineno--;
608  }
609  newline = strchr(f->textbuff + start, '\n');
610  /* Include the newline, if it is there. */
611  end = newline ? newline - f->textbuff + 1 : f->textlen;
612  if (o_start) *o_start = start;
613  if (o_end) *o_end = end;
614}
615
[075ba92]616const char *owl_fmtext_get_text(const owl_fmtext *f)
[5789230]617{
[7d4fbcd]618  return(f->textbuff);
619}
620
[6772d19]621int owl_fmtext_num_bytes(const owl_fmtext *f)
622{
623  return(f->textlen);
624}
625
[a0a5179]626/* set the charater at 'index' to be 'char'.  If index is out of
[9866c3a]627 * bounds don't do anything. If c or char at index is not ASCII, don't
628 * do anything because it's not UTF-8 safe. */
629void owl_fmtext_set_char(owl_fmtext *f, int index, char ch)
[5789230]630{
[4b464a4]631  if ((index < 0) || (index > f->textlen-1)) return;
[9866c3a]632  /* NOT ASCII*/
633  if (f->textbuff[index] & 0x80 || ch & 0x80) return; 
[4b464a4]634  f->textbuff[index]=ch;
635}
636
[b2b0773]637/* Make a copy of the fmtext 'src' into 'dst' */
[075ba92]638void owl_fmtext_copy(owl_fmtext *dst, const owl_fmtext *src)
[5789230]639{
[b2b0773]640  int mallocsize;
641
642  if (src->textlen==0) {
643    mallocsize=5;
644  } else {
645    mallocsize=src->textlen+2;
646  }
[7d4fbcd]647  dst->textlen=src->textlen;
[005fc22]648  dst->bufflen=mallocsize;
[bd3f232]649  dst->textbuff=owl_malloc(mallocsize);
[6bf73ce]650  memcpy(dst->textbuff, src->textbuff, src->textlen+1);
[9866c3a]651  dst->default_attrs = src->default_attrs;
652  dst->default_fgcolor = src->default_fgcolor;
653  dst->default_bgcolor = src->default_bgcolor;
[1fd0b25]654}
655
[72f613a]656/* Search 'f' for the regex 're' for matches starting at
657 * 'start'. Returns the offset of the first match, -1 if not
658 * found. This is a case-insensitive search.
[5789230]659 */
[72f613a]660int owl_fmtext_search(const owl_fmtext *f, const owl_regex *re, int start)
[5789230]661{
[72f613a]662  int offset;
663  if (start > f->textlen ||
664      owl_regex_compare(re, f->textbuff + start, &offset, NULL) != 0)
665    return -1;
666  return offset + start;
[1fd0b25]667}
[12c35df]668
669
670/* Append the text 'text' to 'f' and interpret the zephyr style
671 * formatting syntax to set appropriate attributes.
672 */
[e19eb97]673void owl_fmtext_append_ztext(owl_fmtext *f, const char *text)
[12c35df]674{
675  int stacksize, curattrs, curcolor;
[e19eb97]676  const char *ptr, *txtptr, *tmpptr;
[65b2173]677  char *buff;
[d754b0a]678  int attrstack[32], chrstack[32], colorstack[32];
[12c35df]679
680  curattrs=OWL_FMTEXT_ATTR_NONE;
681  curcolor=OWL_COLOR_DEFAULT;
682  stacksize=0;
683  txtptr=text;
684  while (1) {
685    ptr=strpbrk(txtptr, "@{[<()>]}");
686    if (!ptr) {
687      /* add all the rest of the text and exit */
[8fa9562]688      owl_fmtext_append_attr(f, txtptr, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]689      return;
690    } else if (ptr[0]=='@') {
691      /* add the text up to this point then deal with the stack */
692      buff=owl_malloc(ptr-txtptr+20);
693      strncpy(buff, txtptr, ptr-txtptr);
694      buff[ptr-txtptr]='\0';
[8fa9562]695      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]696      owl_free(buff);
697
698      /* update pointer to point at the @ */
699      txtptr=ptr;
700
701      /* now the stack */
702
703      /* if we've hit our max stack depth, print the @ and move on */
704      if (stacksize==32) {
[1bdffcb]705        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
706        txtptr++;
707        continue;
[12c35df]708      }
709
710      /* if it's an @@, print an @ and continue */
711      if (txtptr[1]=='@') {
[1bdffcb]712        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
713        txtptr+=2;
714        continue;
[12c35df]715      }
[1bdffcb]716       
[12c35df]717      /* if there's no opener, print the @ and continue */
718      tmpptr=strpbrk(txtptr, "(<[{ ");
719      if (!tmpptr || tmpptr[0]==' ') {
[1bdffcb]720        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
721        txtptr++;
722        continue;
[12c35df]723      }
724
725      /* check what command we've got, push it on the stack, start
[1bdffcb]726         using it, and continue ... unless it's a color command */
[12c35df]727      buff=owl_malloc(tmpptr-ptr+20);
728      strncpy(buff, ptr, tmpptr-ptr);
729      buff[tmpptr-ptr]='\0';
730      if (!strcasecmp(buff, "@bold")) {
[1bdffcb]731        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
732        chrstack[stacksize]=tmpptr[0];
[d754b0a]733        colorstack[stacksize]=curcolor;
[1bdffcb]734        stacksize++;
735        curattrs|=OWL_FMTEXT_ATTR_BOLD;
736        txtptr+=6;
737        owl_free(buff);
738        continue;
[12c35df]739      } else if (!strcasecmp(buff, "@b")) {
[1bdffcb]740        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
741        chrstack[stacksize]=tmpptr[0];
[d754b0a]742        colorstack[stacksize]=curcolor;
[1bdffcb]743        stacksize++;
744        curattrs|=OWL_FMTEXT_ATTR_BOLD;
745        txtptr+=3;
746        owl_free(buff);
747        continue;
[12c35df]748      } else if (!strcasecmp(buff, "@i")) {
[1bdffcb]749        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
750        chrstack[stacksize]=tmpptr[0];
[d754b0a]751        colorstack[stacksize]=curcolor;
[1bdffcb]752        stacksize++;
753        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
754        txtptr+=3;
755        owl_free(buff);
756        continue;
[12c35df]757      } else if (!strcasecmp(buff, "@italic")) {
[1bdffcb]758        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
759        chrstack[stacksize]=tmpptr[0];
[d754b0a]760        colorstack[stacksize]=curcolor;
[1bdffcb]761        stacksize++;
762        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
763        txtptr+=8;
764        owl_free(buff);
765        continue;
[d754b0a]766      } else if (!strcasecmp(buff, "@")) {
767        attrstack[stacksize]=OWL_FMTEXT_ATTR_NONE;
768        chrstack[stacksize]=tmpptr[0];
769        colorstack[stacksize]=curcolor;
770        stacksize++;
771        txtptr+=2;
772        owl_free(buff);
773        continue;
[1bdffcb]774
775        /* if it's a color read the color, set the current color and
[12c35df]776           continue */
777      } else if (!strcasecmp(buff, "@color") 
[1bdffcb]778                 && owl_global_get_hascolors(&g)
779                 && owl_global_is_colorztext(&g)) {
780        owl_free(buff);
781        txtptr+=7;
782        tmpptr=strpbrk(txtptr, "@{[<()>]}");
783        if (tmpptr &&
784            ((txtptr[-1]=='(' && tmpptr[0]==')') ||
785             (txtptr[-1]=='<' && tmpptr[0]=='>') ||
786             (txtptr[-1]=='[' && tmpptr[0]==']') ||
787             (txtptr[-1]=='{' && tmpptr[0]=='}'))) {
788
789          /* grab the color name */
790          buff=owl_malloc(tmpptr-txtptr+20);
791          strncpy(buff, txtptr, tmpptr-txtptr);
792          buff[tmpptr-txtptr]='\0';
793
794          /* set it as the current color */
795          curcolor=owl_util_string_to_color(buff);
[1ee5c79]796          if (curcolor == OWL_COLOR_INVALID)
797              curcolor = OWL_COLOR_DEFAULT;
[1bdffcb]798          owl_free(buff);
799          txtptr=tmpptr+1;
800          continue;
801
802        } else {
803
804        }
[12c35df]805
806      } else {
[1bdffcb]807        /* if we didn't understand it, we'll print it.  This is different from zwgc
808         * but zwgc seems to be smarter about some screw cases than I am
809         */
810        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
811        txtptr++;
812        continue;
[12c35df]813      }
814
815    } else if (ptr[0]=='}' || ptr[0]==']' || ptr[0]==')' || ptr[0]=='>') {
816      /* add the text up to this point first */
817      buff=owl_malloc(ptr-txtptr+20);
818      strncpy(buff, txtptr, ptr-txtptr);
819      buff[ptr-txtptr]='\0';
[8fa9562]820      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]821      owl_free(buff);
822
823      /* now deal with the closer */
824      txtptr=ptr;
825
826      /* first, if the stack is empty we must bail (just print and go) */
827      if (stacksize==0) {
[1bdffcb]828        buff=owl_malloc(5);
829        buff[0]=ptr[0];
830        buff[1]='\0';
831        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
832        owl_free(buff);
833        txtptr++;
834        continue;
[12c35df]835      }
836
837      /* if the closing char is what's on the stack, turn off the
838         attribue and pop the stack */
839      if ((ptr[0]==')' && chrstack[stacksize-1]=='(') ||
[1bdffcb]840          (ptr[0]=='>' && chrstack[stacksize-1]=='<') ||
841          (ptr[0]==']' && chrstack[stacksize-1]=='[') ||
842          (ptr[0]=='}' && chrstack[stacksize-1]=='{')) {
843        int i;
844        stacksize--;
845        curattrs=OWL_FMTEXT_ATTR_NONE;
[d754b0a]846        curcolor = colorstack[stacksize];
[1bdffcb]847        for (i=0; i<stacksize; i++) {
848          curattrs|=attrstack[i];
849        }
850        txtptr+=1;
851        continue;
[12c35df]852      } else {
[1bdffcb]853        /* otherwise print and continue */
854        buff=owl_malloc(5);
855        buff[0]=ptr[0];
856        buff[1]='\0';
857        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
858        owl_free(buff);
859        txtptr++;
860        continue;
[12c35df]861      }
862    } else {
863      /* we've found an unattached opener, print everything and move on */
864      buff=owl_malloc(ptr-txtptr+20);
865      strncpy(buff, txtptr, ptr-txtptr+1);
866      buff[ptr-txtptr+1]='\0';
[8fa9562]867      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
[12c35df]868      owl_free(buff);
869      txtptr=ptr+1;
870      continue;
871    }
872  }
873}
[a0a5179]874
875/* requires that the list values are strings or NULL.
876 * joins the elements together with join_with.
877 * If format_fn is specified, passes it the list element value
878 * and it will return a string which this needs to free. */
[77bced3]879void owl_fmtext_append_list(owl_fmtext *f, const owl_list *l, const char *join_with, char *(format_fn)(const char *))
[a0a5179]880{
881  int i, size;
[e19eb97]882  const char *elem;
[a0a5179]883  char *text;
884
885  size = owl_list_get_size(l);
886  for (i=0; i<size; i++) {
[4d86e06]887    elem = owl_list_get_element(l,i);
[a0a5179]888    if (elem && format_fn) {
889      text = format_fn(elem);
890      if (text) {
[1bdffcb]891        owl_fmtext_append_normal(f, text);
892        owl_free(text);
[a0a5179]893      }
894    } else if (elem) {
895      owl_fmtext_append_normal(f, elem);
896    }
897    if ((i < size-1) && join_with) {
898      owl_fmtext_append_normal(f, join_with);
899    }
900  }
901}
902
903/* Free all memory allocated by the object */
[7ab0020]904void owl_fmtext_cleanup(owl_fmtext *f)
[a0a5179]905{
906  if (f->textbuff) owl_free(f->textbuff);
[8fa9562]907}
908
909/*** Color Pair manager ***/
910void owl_fmtext_init_colorpair_mgr(owl_colorpair_mgr *cpmgr)
911{
[af1920fd]912  /* This could be a bitarray if we wanted to save memory. */
[c2c5c77]913  short i, j;
914  cpmgr->next = 8;
915 
[af1920fd]916  /* The test is <= because we allocate COLORS+1 entries. */
[c2c5c77]917  cpmgr->pairs = owl_malloc((COLORS+1) * sizeof(short*));
918  for(i = 0; i <= COLORS; i++) {
919    cpmgr->pairs[i] = owl_malloc((COLORS+1) * sizeof(short));
920    for(j = 0; j <= COLORS; j++) {
[8fa9562]921      cpmgr->pairs[i][j] = -1;
922    }
923  }
[fa3290d]924  if (owl_global_get_hascolors(&g)) {
925    for(i = 0; i < 8; i++) {
926      short fg, bg;
927      if (i >= COLORS) continue;
928      pair_content(i, &fg, &bg);
929      cpmgr->pairs[fg+1][bg+1] = i;
930    }
[c2c5c77]931  }
[a0a5179]932}
933
[8fa9562]934/* Reset used list */
[c79a047]935void owl_fmtext_reset_colorpairs(void)
[8fa9562]936{
[fa3290d]937  if (owl_global_get_hascolors(&g)) {
938    short i, j;
939    owl_colorpair_mgr *cpmgr = owl_global_get_colorpair_mgr(&g);
940    cpmgr->next = 8;
941   
[af1920fd]942    /* The test is <= because we allocated COLORS+1 entries. */
[fa3290d]943    for(i = 0; i <= COLORS; i++) {
944      for(j = 0; j <= COLORS; j++) {
945        cpmgr->pairs[i][j] = -1;
946      }
947    }
948    for(i = 0; i < 8; i++) {
949      short fg, bg;
950      if (i >= COLORS) continue;
951      pair_content(i, &fg, &bg);
952      cpmgr->pairs[fg+1][bg+1] = i;
[eeeef20]953    }
[c2c5c77]954  }
[8fa9562]955}
956
957/* Assign pairs by request */
[1bdffcb]958short owl_fmtext_get_colorpair(int fg, int bg)
[8fa9562]959{
960  owl_colorpair_mgr *cpmgr;
[423adcb]961  short pair;
[1bdffcb]962
[1b737a1]963  /* Sanity (Bounds) Check */
964  if (fg > COLORS || fg < OWL_COLOR_DEFAULT) fg = OWL_COLOR_DEFAULT;
965  if (bg > COLORS || bg < OWL_COLOR_DEFAULT) bg = OWL_COLOR_DEFAULT;
966           
[1bdffcb]967#ifdef HAVE_USE_DEFAULT_COLORS
[8fa9562]968  if (fg == OWL_COLOR_DEFAULT) fg = -1;
[1bdffcb]969#else
970  if (fg == OWL_COLOR_DEFAULT) fg = 0;
971  if (bg == OWL_COLOR_DEFAULT) bg = 0;
972#endif
973
[af1920fd]974  /* looking for a pair we already set up for this draw. */
[c2c5c77]975  cpmgr = owl_global_get_colorpair_mgr(&g);
976  pair = cpmgr->pairs[fg+1][bg+1];
977  if (!(pair != -1 && pair < cpmgr->next)) {
[af1920fd]978    /* If we didn't find a pair, search for a free one to assign. */
[c2c5c77]979    pair = (cpmgr->next < COLOR_PAIRS) ? cpmgr->next : -1;
980    if (pair != -1) {
[af1920fd]981      /* We found a free pair, initialize it. */
[c2c5c77]982      init_pair(pair, fg, bg);
983      cpmgr->pairs[fg+1][bg+1] = pair;
984      cpmgr->next++;
985    }
986    else if (bg != OWL_COLOR_DEFAULT) {
[af1920fd]987      /* We still don't have a pair, drop the background color. Too bad. */
[c2c5c77]988      owl_function_debugmsg("colorpairs: color shortage - dropping background color.");
989      pair = owl_fmtext_get_colorpair(fg, OWL_COLOR_DEFAULT);
990    }
991    else {
[af1920fd]992      /* We still don't have a pair, defaults all around. */
[c2c5c77]993      owl_function_debugmsg("colorpairs: color shortage - dropping foreground and background color.");
994      pair = 0;
[8fa9562]995    }
996  }
997  return pair;
998}
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