source: fmtext.c @ 65fea01

barnowl_perlaimdebianrelease-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 65fea01 was fa3290d, checked in by Alejandro R. Sedeño <asedeno@mit.edu>, 14 years ago
Do not initialize the colorpair manager array if we don't have colors. More specifically, do not write into arrays we have not allocated and segfault.
  • Property mode set to 100644
File size: 21.4 KB
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1#include "owl.h"
2#include <stdlib.h>
3#include <string.h>
4
5static const char fileIdent[] = "$Id$";
6
7/* initialize an fmtext with no data */
8void owl_fmtext_init_null(owl_fmtext *f)
9{
10  f->textlen=0;
11  f->bufflen=5;
12  f->textbuff=owl_malloc(5);
13  f->fmbuff=owl_malloc(5);
14  f->fgcolorbuff=owl_malloc(5 * sizeof(short));
15  f->bgcolorbuff=owl_malloc(5 * sizeof(short));
16  f->textbuff[0]=0;
17  f->fmbuff[0]=OWL_FMTEXT_ATTR_NONE;
18  f->fgcolorbuff[0]=OWL_COLOR_DEFAULT;
19  f->bgcolorbuff[0]=OWL_COLOR_DEFAULT;
20}
21
22/* Clear the data from an fmtext, but don't deallocate memory. This
23   fmtext can then be appended to again. */
24void owl_fmtext_clear(owl_fmtext *f)
25{
26    f->textlen = 0;
27    f->textbuff[0] = 0;
28    f->fmbuff[0]=OWL_FMTEXT_ATTR_NONE;
29    f->fgcolorbuff[0]=OWL_COLOR_DEFAULT;
30    f->bgcolorbuff[0]=OWL_COLOR_DEFAULT;
31}
32
33/* Internal function.  Set the attribute 'attr' from index 'first' to
34 * index 'last'
35 */
36void _owl_fmtext_set_attr(owl_fmtext *f, int attr, int first, int last)
37{
38  int i;
39  for (i=first; i<=last; i++) {
40    f->fmbuff[i]=(unsigned char) attr;
41  }
42}
43
44/* Internal function.  Add the attribute 'attr' to the existing
45 * attributes from index 'first' to index 'last'
46 */
47void _owl_fmtext_add_attr(owl_fmtext *f, int attr, int first, int last)
48{
49  int i;
50  for (i=first; i<=last; i++) {
51    f->fmbuff[i]|=(unsigned char) attr;
52  }
53}
54
55/* Internal function.  Set the color to be 'color' from index 'first'
56 * to index 'last
57 */
58void _owl_fmtext_set_fgcolor(owl_fmtext *f, int color, int first, int last)
59{
60  int i;
61  for (i=first; i<=last; i++) {
62    f->fgcolorbuff[i]=(short)color;
63  }
64}
65
66void _owl_fmtext_set_bgcolor(owl_fmtext *f, int color, int first, int last)
67{
68  int i;
69  for (i=first; i<=last; i++) {
70    f->bgcolorbuff[i]=(short)color;
71  }
72}
73
74void _owl_fmtext_realloc(owl_fmtext *f, int newlen) /*noproto*/
75{
76    if(newlen + 1 > f->bufflen) {
77      f->textbuff=owl_realloc(f->textbuff, newlen+1);
78      f->fmbuff=owl_realloc(f->fmbuff, newlen+1);
79      f->fgcolorbuff=owl_realloc(f->fgcolorbuff, (newlen+1) * sizeof(short));
80      f->bgcolorbuff=owl_realloc(f->bgcolorbuff, (newlen+1) * sizeof(short));
81      f->bufflen = newlen+1;
82  }
83}
84
85/* append text to the end of 'f' with attribute 'attr' and color
86 * 'color'
87 */
88void owl_fmtext_append_attr(owl_fmtext *f, char *text, int attr, int fgcolor, int bgcolor)
89{
90  int newlen;
91  newlen=strlen(f->textbuff)+strlen(text);
92  _owl_fmtext_realloc(f, newlen);
93 
94  strcat(f->textbuff, text);
95  _owl_fmtext_set_attr(f, attr, f->textlen, newlen);
96  _owl_fmtext_set_fgcolor(f, fgcolor, f->textlen, newlen);
97  _owl_fmtext_set_bgcolor(f, bgcolor, f->textlen, newlen);
98  f->textlen=newlen;
99}
100
101/* Append normal, uncolored text 'text' to 'f' */
102void owl_fmtext_append_normal(owl_fmtext *f, char *text)
103{
104  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
105}
106
107/* Append normal text 'text' to 'f' with color 'color' */
108void owl_fmtext_append_normal_color(owl_fmtext *f, char *text, int fgcolor, int bgcolor)
109{
110  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_NONE, fgcolor, bgcolor);
111}
112
113/* Append bold text 'text' to 'f' */
114void owl_fmtext_append_bold(owl_fmtext *f, char *text)
115{
116  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
117}
118
119/* Append reverse video text 'text' to 'f' */
120void owl_fmtext_append_reverse(owl_fmtext *f, char *text)
121{
122  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
123}
124
125/* Append reversed and bold, uncolored text 'text' to 'f' */
126void owl_fmtext_append_reversebold(owl_fmtext *f, char *text)
127{
128  owl_fmtext_append_attr(f, text, OWL_FMTEXT_ATTR_REVERSE | OWL_FMTEXT_ATTR_BOLD, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
129}
130
131/* Add the attribute 'attr' to all text in 'f' */
132void owl_fmtext_addattr(owl_fmtext *f, int attr)
133{
134  /* add the attribute to all text */
135  int i, j;
136
137  j=f->textlen;
138  for (i=0; i<j; i++) {
139    f->fmbuff[i] |= attr;
140  }
141}
142
143/* Anywhere the color is NOT ALREDY SET, set the color to 'color'.
144 * Other colors are left unchanged
145 */
146void owl_fmtext_colorize(owl_fmtext *f, int color)
147{
148  /* everywhere the fgcolor is OWL_COLOR_DEFAULT, change it to be 'color' */
149  int i, j;
150
151  j=f->textlen;
152  for(i=0; i<j; i++) {
153    if (f->fgcolorbuff[i]==OWL_COLOR_DEFAULT) f->fgcolorbuff[i] = (short)color;
154  }
155}
156
157void owl_fmtext_colorizebg(owl_fmtext *f, int color)
158{
159  /* everywhere the bgcolor is OWL_COLOR_DEFAULT, change it to be 'color' */
160  int i, j;
161
162  j=f->textlen;
163  for(i=0; i<j; i++) {
164    if (f->bgcolorbuff[i]==OWL_COLOR_DEFAULT) f->bgcolorbuff[i] = (short)color;
165  }
166}
167
168/* Internal function.  Append text from 'in' between index 'start' and
169 * 'stop' to the end of 'f'
170 */
171void _owl_fmtext_append_fmtext(owl_fmtext *f, owl_fmtext *in, int start, int stop)
172{
173  int newlen, i;
174
175  newlen=strlen(f->textbuff)+(stop-start+1);
176  _owl_fmtext_realloc(f, newlen);
177
178  strncat(f->textbuff, in->textbuff+start, stop-start+1);
179  f->textbuff[newlen]='\0';
180  for (i=start; i<=stop; i++) {
181    f->fmbuff[f->textlen+(i-start)]=in->fmbuff[i];
182    f->fgcolorbuff[f->textlen+(i-start)]=in->fgcolorbuff[i];
183    f->bgcolorbuff[f->textlen+(i-start)]=in->bgcolorbuff[i];
184  }
185  f->textlen=newlen;
186}
187
188/* append fmtext 'in' to 'f' */
189void owl_fmtext_append_fmtext(owl_fmtext *f, owl_fmtext *in)
190{
191  _owl_fmtext_append_fmtext(f, in, 0, in->textlen);
192
193}
194
195/* Append 'nspaces' number of spaces to the end of 'f' */
196void owl_fmtext_append_spaces(owl_fmtext *f, int nspaces)
197{
198  int i;
199  for (i=0; i<nspaces; i++) {
200    owl_fmtext_append_normal(f, " ");
201  }
202}
203
204/* Return a plain version of the fmtext.  Caller is responsible for
205 * freeing the return
206 */
207char *owl_fmtext_print_plain(owl_fmtext *f)
208{
209  return(owl_strdup(f->textbuff));
210}
211
212/* add the formatted text to the curses window 'w'.  The window 'w'
213 * must already be initiatlized with curses
214 */
215void owl_fmtext_curs_waddstr(owl_fmtext *f, WINDOW *w)
216{
217  char *tmpbuff;
218  int position, trans1, trans2, trans3, len, lastsame;
219
220  if (w==NULL) {
221    owl_function_debugmsg("Hit a null window in owl_fmtext_curs_waddstr.");
222    return;
223  }
224
225  tmpbuff=owl_malloc(f->textlen+10);
226
227  position=0;
228  len=f->textlen;
229  while (position<=len) {
230    /* find the last char with the current format and color */
231    trans1=owl_util_find_trans(f->fmbuff+position, len-position);
232    trans2=owl_util_find_trans_short(f->fgcolorbuff+position, len-position);
233    trans3=owl_util_find_trans_short(f->bgcolorbuff+position, len-position);
234
235    lastsame = (trans1 < trans2) ? trans1 : trans2;
236    lastsame = (lastsame < trans3) ? lastsame : trans3;
237    lastsame += position;
238
239    /* set the format */
240    wattrset(w, A_NORMAL);
241    if (f->fmbuff[position] & OWL_FMTEXT_ATTR_BOLD) {
242      wattron(w, A_BOLD);
243    }
244    if (f->fmbuff[position] & OWL_FMTEXT_ATTR_REVERSE) {
245      wattron(w, A_REVERSE);
246    }
247    if (f->fmbuff[position] & OWL_FMTEXT_ATTR_UNDERLINE) {
248      wattron(w, A_UNDERLINE);
249    }
250
251    /* set the color */
252    /* warning, this is sort of a hack */
253    if (owl_global_get_hascolors(&g)) {
254      short fg, bg, pair;
255      fg = f->fgcolorbuff[position];
256      bg = f->bgcolorbuff[position];
257
258      pair = owl_fmtext_get_colorpair(fg, bg);
259      if (pair != -1) {
260        wcolor_set(w,pair,NULL);
261      }
262    }
263
264    /* add the text */
265    strncpy(tmpbuff, f->textbuff + position, lastsame-position+1);
266    tmpbuff[lastsame-position+1]='\0';
267    waddstr(w, tmpbuff);
268
269    position=lastsame+1;
270  }
271  owl_free(tmpbuff);
272}
273
274
275/* start with line 'aline' (where the first line is 0) and print
276 * 'lines' number of lines into 'out'
277 */
278int owl_fmtext_truncate_lines(owl_fmtext *in, int aline, int lines, owl_fmtext *out)
279{
280  char *ptr1, *ptr2;
281  int i, offset;
282 
283  /* find the starting line */
284  ptr1=in->textbuff;
285  if (aline!=0) {
286    for (i=0; i<aline; i++) {
287      ptr1=strchr(ptr1, '\n');
288      if (!ptr1) return(-1);
289      ptr1++;
290    }
291  }
292  /* ptr1 now holds the starting point */
293
294  /* copy in the next 'lines' lines */
295  if (lines<1) return(-1);
296
297  for (i=0; i<lines; i++) {
298    offset=ptr1-in->textbuff;
299    ptr2=strchr(ptr1, '\n');
300    if (!ptr2) {
301      _owl_fmtext_append_fmtext(out, in, offset, (in->textlen)-1);
302      return(-1);
303    }
304    _owl_fmtext_append_fmtext(out, in, offset, (ptr2-ptr1)+offset);
305    ptr1=ptr2+1;
306  }
307  return(0);
308}
309
310/* Truncate the message so that each line begins at column 'acol' and
311 * ends at 'bcol' or sooner.  The first column is number 0.  The new
312 * message is placed in 'out'.  The message is * expected to end in a
313 * new line for now
314 */
315void owl_fmtext_truncate_cols(owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
316{
317  char *ptr1, *ptr2, *last;
318  int len, offset;
319
320  last=in->textbuff+in->textlen-1;
321  ptr1=in->textbuff;
322  while (ptr1<=last) {
323    ptr2=strchr(ptr1, '\n');
324    if (!ptr2) {
325      /* but this shouldn't happen if we end in a \n */
326      break;
327    }
328   
329    if (ptr2==ptr1) {
330      owl_fmtext_append_normal(out, "\n");
331      ptr1++;
332      continue;
333    }
334
335    /* we need to check that we won't run over here */
336    len=bcol-acol;
337    if (len > (ptr2-(ptr1+acol))) {
338      /* the whole line fits with room to spare, don't take a full 'len' */
339      len=ptr2-(ptr1+acol);
340    }
341    if (len>last-ptr1) {
342      /* the whole rest of the text fits with room to spare, adjust for it */
343      len-=(last-ptr1);
344    }
345    if (len<=0) {
346      /* saftey check */
347      owl_fmtext_append_normal(out, "\n");
348      ptr1=ptr2+1;
349      continue;
350    }
351
352    offset=ptr1-in->textbuff;
353    _owl_fmtext_append_fmtext(out, in, offset+acol, offset+acol+len);
354
355    ptr1=ptr2+1;
356  }
357}
358
359/* Return the number of lines in 'f' */
360int owl_fmtext_num_lines(owl_fmtext *f)
361{
362  int lines, i;
363
364  if (f->textlen==0) return(0);
365 
366  lines=0;
367  for (i=0; i<f->textlen; i++) {
368    if (f->textbuff[i]=='\n') lines++;
369  }
370
371  /* if the last char wasn't a \n there's one more line */
372  if (f->textbuff[i-1]!='\n') lines++;
373
374  return(lines);
375}
376
377char *owl_fmtext_get_text(owl_fmtext *f)
378{
379  return(f->textbuff);
380}
381
382/* set the charater at 'index' to be 'char'.  If index is out of
383 * bounds don't do anything */
384void owl_fmtext_set_char(owl_fmtext *f, int index, int ch)
385{
386  if ((index < 0) || (index > f->textlen-1)) return;
387  f->textbuff[index]=ch;
388}
389
390/* Make a copy of the fmtext 'src' into 'dst' */
391void owl_fmtext_copy(owl_fmtext *dst, owl_fmtext *src)
392{
393  int mallocsize;
394
395  if (src->textlen==0) {
396    mallocsize=5;
397  } else {
398    mallocsize=src->textlen+2;
399  }
400  dst->textlen=src->textlen;
401  dst->textbuff=owl_malloc(mallocsize);
402  dst->fmbuff=owl_malloc(mallocsize);
403  dst->fgcolorbuff=owl_malloc(mallocsize * sizeof(short));
404  dst->bgcolorbuff=owl_malloc(mallocsize * sizeof(short));
405  memcpy(dst->textbuff, src->textbuff, src->textlen+1);
406  memcpy(dst->fmbuff, src->fmbuff, src->textlen);
407  memcpy(dst->fgcolorbuff, src->fgcolorbuff, src->textlen * sizeof(short));
408  memcpy(dst->bgcolorbuff, src->bgcolorbuff, src->textlen * sizeof(short));
409}
410
411/* highlight all instances of "string".  Return the number of
412 * instances found.  This is a case insensitive search.
413 */
414int owl_fmtext_search_and_highlight(owl_fmtext *f, char *string)
415{
416
417  int found, len;
418  char *ptr1, *ptr2;
419
420  len=strlen(string);
421  found=0;
422  ptr1=f->textbuff;
423  while (ptr1-f->textbuff <= f->textlen) {
424    ptr2=stristr(ptr1, string);
425    if (!ptr2) return(found);
426
427    found++;
428    _owl_fmtext_add_attr(f, OWL_FMTEXT_ATTR_REVERSE,
429                         ptr2 - f->textbuff,
430                         ptr2 - f->textbuff + len - 1);
431
432    ptr1=ptr2+len;
433  }
434  return(found);
435}
436
437/* return 1 if the string is found, 0 if not.  This is a case
438 *  insensitive search.
439 */
440int owl_fmtext_search(owl_fmtext *f, char *string)
441{
442
443  if (stristr(f->textbuff, string)) return(1);
444  return(0);
445}
446
447
448/* Append the text 'text' to 'f' and interpret the zephyr style
449 * formatting syntax to set appropriate attributes.
450 */
451void owl_fmtext_append_ztext(owl_fmtext *f, char *text)
452{
453  int stacksize, curattrs, curcolor;
454  char *ptr, *txtptr, *buff, *tmpptr;
455  int attrstack[32], chrstack[32], colorstack[32];
456
457  curattrs=OWL_FMTEXT_ATTR_NONE;
458  curcolor=OWL_COLOR_DEFAULT;
459  stacksize=0;
460  txtptr=text;
461  while (1) {
462    ptr=strpbrk(txtptr, "@{[<()>]}");
463    if (!ptr) {
464      /* add all the rest of the text and exit */
465      owl_fmtext_append_attr(f, txtptr, curattrs, curcolor, OWL_COLOR_DEFAULT);
466      return;
467    } else if (ptr[0]=='@') {
468      /* add the text up to this point then deal with the stack */
469      buff=owl_malloc(ptr-txtptr+20);
470      strncpy(buff, txtptr, ptr-txtptr);
471      buff[ptr-txtptr]='\0';
472      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
473      owl_free(buff);
474
475      /* update pointer to point at the @ */
476      txtptr=ptr;
477
478      /* now the stack */
479
480      /* if we've hit our max stack depth, print the @ and move on */
481      if (stacksize==32) {
482        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
483        txtptr++;
484        continue;
485      }
486
487      /* if it's an @@, print an @ and continue */
488      if (txtptr[1]=='@') {
489        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
490        txtptr+=2;
491        continue;
492      }
493       
494      /* if there's no opener, print the @ and continue */
495      tmpptr=strpbrk(txtptr, "(<[{ ");
496      if (!tmpptr || tmpptr[0]==' ') {
497        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
498        txtptr++;
499        continue;
500      }
501
502      /* check what command we've got, push it on the stack, start
503         using it, and continue ... unless it's a color command */
504      buff=owl_malloc(tmpptr-ptr+20);
505      strncpy(buff, ptr, tmpptr-ptr);
506      buff[tmpptr-ptr]='\0';
507      if (!strcasecmp(buff, "@bold")) {
508        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
509        chrstack[stacksize]=tmpptr[0];
510        colorstack[stacksize]=curcolor;
511        stacksize++;
512        curattrs|=OWL_FMTEXT_ATTR_BOLD;
513        txtptr+=6;
514        owl_free(buff);
515        continue;
516      } else if (!strcasecmp(buff, "@b")) {
517        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
518        chrstack[stacksize]=tmpptr[0];
519        colorstack[stacksize]=curcolor;
520        stacksize++;
521        curattrs|=OWL_FMTEXT_ATTR_BOLD;
522        txtptr+=3;
523        owl_free(buff);
524        continue;
525      } else if (!strcasecmp(buff, "@i")) {
526        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
527        chrstack[stacksize]=tmpptr[0];
528        colorstack[stacksize]=curcolor;
529        stacksize++;
530        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
531        txtptr+=3;
532        owl_free(buff);
533        continue;
534      } else if (!strcasecmp(buff, "@italic")) {
535        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
536        chrstack[stacksize]=tmpptr[0];
537        colorstack[stacksize]=curcolor;
538        stacksize++;
539        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
540        txtptr+=8;
541        owl_free(buff);
542        continue;
543      } else if (!strcasecmp(buff, "@")) {
544        attrstack[stacksize]=OWL_FMTEXT_ATTR_NONE;
545        chrstack[stacksize]=tmpptr[0];
546        colorstack[stacksize]=curcolor;
547        stacksize++;
548        txtptr+=2;
549        owl_free(buff);
550        continue;
551
552        /* if it's a color read the color, set the current color and
553           continue */
554      } else if (!strcasecmp(buff, "@color") 
555                 && owl_global_get_hascolors(&g)
556                 && owl_global_is_colorztext(&g)) {
557        owl_free(buff);
558        txtptr+=7;
559        tmpptr=strpbrk(txtptr, "@{[<()>]}");
560        if (tmpptr &&
561            ((txtptr[-1]=='(' && tmpptr[0]==')') ||
562             (txtptr[-1]=='<' && tmpptr[0]=='>') ||
563             (txtptr[-1]=='[' && tmpptr[0]==']') ||
564             (txtptr[-1]=='{' && tmpptr[0]=='}'))) {
565
566          /* grab the color name */
567          buff=owl_malloc(tmpptr-txtptr+20);
568          strncpy(buff, txtptr, tmpptr-txtptr);
569          buff[tmpptr-txtptr]='\0';
570
571          /* set it as the current color */
572          curcolor=owl_util_string_to_color(buff);
573          if (curcolor==-1) curcolor=OWL_COLOR_DEFAULT;
574          owl_free(buff);
575          txtptr=tmpptr+1;
576          continue;
577
578        } else {
579
580        }
581
582      } else {
583        /* if we didn't understand it, we'll print it.  This is different from zwgc
584         * but zwgc seems to be smarter about some screw cases than I am
585         */
586        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
587        txtptr++;
588        continue;
589      }
590
591    } else if (ptr[0]=='}' || ptr[0]==']' || ptr[0]==')' || ptr[0]=='>') {
592      /* add the text up to this point first */
593      buff=owl_malloc(ptr-txtptr+20);
594      strncpy(buff, txtptr, ptr-txtptr);
595      buff[ptr-txtptr]='\0';
596      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
597      owl_free(buff);
598
599      /* now deal with the closer */
600      txtptr=ptr;
601
602      /* first, if the stack is empty we must bail (just print and go) */
603      if (stacksize==0) {
604        buff=owl_malloc(5);
605        buff[0]=ptr[0];
606        buff[1]='\0';
607        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
608        owl_free(buff);
609        txtptr++;
610        continue;
611      }
612
613      /* if the closing char is what's on the stack, turn off the
614         attribue and pop the stack */
615      if ((ptr[0]==')' && chrstack[stacksize-1]=='(') ||
616          (ptr[0]=='>' && chrstack[stacksize-1]=='<') ||
617          (ptr[0]==']' && chrstack[stacksize-1]=='[') ||
618          (ptr[0]=='}' && chrstack[stacksize-1]=='{')) {
619        int i;
620        stacksize--;
621        curattrs=OWL_FMTEXT_ATTR_NONE;
622        curcolor = colorstack[stacksize];
623        for (i=0; i<stacksize; i++) {
624          curattrs|=attrstack[i];
625        }
626        txtptr+=1;
627        continue;
628      } else {
629        /* otherwise print and continue */
630        buff=owl_malloc(5);
631        buff[0]=ptr[0];
632        buff[1]='\0';
633        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
634        owl_free(buff);
635        txtptr++;
636        continue;
637      }
638    } else {
639      /* we've found an unattached opener, print everything and move on */
640      buff=owl_malloc(ptr-txtptr+20);
641      strncpy(buff, txtptr, ptr-txtptr+1);
642      buff[ptr-txtptr+1]='\0';
643      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
644      owl_free(buff);
645      txtptr=ptr+1;
646      continue;
647    }
648  }
649}
650
651/* requires that the list values are strings or NULL.
652 * joins the elements together with join_with.
653 * If format_fn is specified, passes it the list element value
654 * and it will return a string which this needs to free. */
655void owl_fmtext_append_list(owl_fmtext *f, owl_list *l, char *join_with, char *(format_fn)(void*))
656{
657  int i, size;
658  void *elem;
659  char *text;
660
661  size = owl_list_get_size(l);
662  for (i=0; i<size; i++) {
663    elem = (char*)owl_list_get_element(l,i);
664    if (elem && format_fn) {
665      text = format_fn(elem);
666      if (text) {
667        owl_fmtext_append_normal(f, text);
668        owl_free(text);
669      }
670    } else if (elem) {
671      owl_fmtext_append_normal(f, elem);
672    }
673    if ((i < size-1) && join_with) {
674      owl_fmtext_append_normal(f, join_with);
675    }
676  }
677}
678
679/* Free all memory allocated by the object */
680void owl_fmtext_free(owl_fmtext *f)
681{
682  if (f->textbuff) owl_free(f->textbuff);
683  if (f->fmbuff) owl_free(f->fmbuff);
684  if (f->fgcolorbuff) owl_free(f->fgcolorbuff);
685  if (f->bgcolorbuff) owl_free(f->bgcolorbuff);
686}
687
688/*** Color Pair manager ***/
689void owl_fmtext_init_colorpair_mgr(owl_colorpair_mgr *cpmgr)
690{
691  // This could be a bitarray if we wanted to save memory.
692  short i, j;
693  cpmgr->next = 8;
694 
695  // The test is <= because we allocate COLORS+1 entries.
696  cpmgr->pairs = owl_malloc((COLORS+1) * sizeof(short*));
697  for(i = 0; i <= COLORS; i++) {
698    cpmgr->pairs[i] = owl_malloc((COLORS+1) * sizeof(short));
699    for(j = 0; j <= COLORS; j++) {
700      cpmgr->pairs[i][j] = -1;
701    }
702  }
703  if (owl_global_get_hascolors(&g)) {
704    for(i = 0; i < 8; i++) {
705      short fg, bg;
706      if (i >= COLORS) continue;
707      pair_content(i, &fg, &bg);
708      cpmgr->pairs[fg+1][bg+1] = i;
709    }
710  }
711}
712
713/* Reset used list */
714void owl_fmtext_reset_colorpairs()
715{
716  if (owl_global_get_hascolors(&g)) {
717    short i, j;
718    owl_colorpair_mgr *cpmgr = owl_global_get_colorpair_mgr(&g);
719    cpmgr->next = 8;
720   
721    // The test is <= because we allocated COLORS+1 entries.
722    for(i = 0; i <= COLORS; i++) {
723      for(j = 0; j <= COLORS; j++) {
724        cpmgr->pairs[i][j] = -1;
725      }
726    }
727    for(i = 0; i < 8; i++) {
728      short fg, bg;
729      if (i >= COLORS) continue;
730      pair_content(i, &fg, &bg);
731      cpmgr->pairs[fg+1][bg+1] = i;
732    }
733  }
734}
735
736/* Assign pairs by request */
737short owl_fmtext_get_colorpair(int fg, int bg)
738{
739  owl_colorpair_mgr *cpmgr;
740  short pair, default_bg;
741
742#ifdef HAVE_USE_DEFAULT_COLORS
743  if (fg == OWL_COLOR_DEFAULT) fg = -1;
744  default_bg = OWL_COLOR_DEFAULT;
745#else
746  if (fg == OWL_COLOR_DEFAULT) fg = 0;
747  if (bg == OWL_COLOR_DEFAULT) bg = 0;
748  default_bg = COLOR_BLACK;
749#endif
750
751  // looking for a pair we already set up for this draw.
752  cpmgr = owl_global_get_colorpair_mgr(&g);
753  pair = cpmgr->pairs[fg+1][bg+1];
754  if (!(pair != -1 && pair < cpmgr->next)) {
755/*    owl_global_set_needrefresh(&g);*/
756    // If we didn't find a pair, search for a free one to assign.
757    pair = (cpmgr->next < COLOR_PAIRS) ? cpmgr->next : -1;
758    if (pair != -1) {
759      // We found a free pair, initialize it.
760      init_pair(pair, fg, bg);
761      cpmgr->pairs[fg+1][bg+1] = pair;
762      cpmgr->next++;
763    }
764    else if (bg != OWL_COLOR_DEFAULT) {
765      // We still don't have a pair, drop the background color. Too bad.
766      owl_function_debugmsg("colorpairs: color shortage - dropping background color.");
767      pair = owl_fmtext_get_colorpair(fg, OWL_COLOR_DEFAULT);
768    }
769    else {
770      // We still don't have a pair, defaults all around.
771      owl_function_debugmsg("colorpairs: color shortage - dropping foreground and background color.");
772      pair = 0;
773    }
774  }
775  return pair;
776}
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