source: fmtext.c @ a387d12e

barnowl_perlaimdebianrelease-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since a387d12e was a387d12e, checked in by Nelson Elhage <nelhage@mit.edu>, 14 years ago
Implementing an LRU cache of the message list fmtexts. This reduces memory usage by roughly 1MB/kilo-zephyrs in steady state.
  • Property mode set to 100644
File size: 20.5 KB
Line 
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);
15  f->bgcolorbuff=owl_malloc(5);
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]=(unsigned char) 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]=(unsigned char) 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);
80      f->bgcolorbuff=owl_realloc(f->bgcolorbuff, newlen+1);
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] = 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] = 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(f->fgcolorbuff+position, len-position);
233    trans3=owl_util_find_trans(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      int fg, bg;
255      short pair;
256      fg = f->fgcolorbuff[position];
257      bg = f->bgcolorbuff[position];
258
259      pair = owl_fmtext_get_colorpair(fg, bg);
260      if (pair != -1) {
261        wattron(w, COLOR_PAIR(pair));
262      }
263    }
264
265    /* add the text */
266    strncpy(tmpbuff, f->textbuff + position, lastsame-position+1);
267    tmpbuff[lastsame-position+1]='\0';
268    waddstr(w, tmpbuff);
269
270    position=lastsame+1;
271  }
272  owl_free(tmpbuff);
273}
274
275
276/* start with line 'aline' (where the first line is 0) and print
277 * 'lines' number of lines into 'out'
278 */
279int owl_fmtext_truncate_lines(owl_fmtext *in, int aline, int lines, owl_fmtext *out)
280{
281  char *ptr1, *ptr2;
282  int i, offset;
283 
284  /* find the starting line */
285  ptr1=in->textbuff;
286  if (aline!=0) {
287    for (i=0; i<aline; i++) {
288      ptr1=strchr(ptr1, '\n');
289      if (!ptr1) return(-1);
290      ptr1++;
291    }
292  }
293  /* ptr1 now holds the starting point */
294
295  /* copy in the next 'lines' lines */
296  if (lines<1) return(-1);
297
298  for (i=0; i<lines; i++) {
299    offset=ptr1-in->textbuff;
300    ptr2=strchr(ptr1, '\n');
301    if (!ptr2) {
302      _owl_fmtext_append_fmtext(out, in, offset, (in->textlen)-1);
303      return(-1);
304    }
305    _owl_fmtext_append_fmtext(out, in, offset, (ptr2-ptr1)+offset);
306    ptr1=ptr2+1;
307  }
308  return(0);
309}
310
311/* Truncate the message so that each line begins at column 'acol' and
312 * ends at 'bcol' or sooner.  The first column is number 0.  The new
313 * message is placed in 'out'.  The message is * expected to end in a
314 * new line for now
315 */
316void owl_fmtext_truncate_cols(owl_fmtext *in, int acol, int bcol, owl_fmtext *out)
317{
318  char *ptr1, *ptr2, *last;
319  int len, offset;
320
321  last=in->textbuff+in->textlen-1;
322  ptr1=in->textbuff;
323  while (ptr1<=last) {
324    ptr2=strchr(ptr1, '\n');
325    if (!ptr2) {
326      /* but this shouldn't happen if we end in a \n */
327      break;
328    }
329   
330    if (ptr2==ptr1) {
331      owl_fmtext_append_normal(out, "\n");
332      ptr1++;
333      continue;
334    }
335
336    /* we need to check that we won't run over here */
337    len=bcol-acol;
338    if (len > (ptr2-(ptr1+acol))) {
339      /* the whole line fits with room to spare, don't take a full 'len' */
340      len=ptr2-(ptr1+acol);
341    }
342    if (len>last-ptr1) {
343      /* the whole rest of the text fits with room to spare, adjust for it */
344      len-=(last-ptr1);
345    }
346    if (len<=0) {
347      /* saftey check */
348      owl_fmtext_append_normal(out, "\n");
349      ptr1=ptr2+1;
350      continue;
351    }
352
353    offset=ptr1-in->textbuff;
354    _owl_fmtext_append_fmtext(out, in, offset+acol, offset+acol+len);
355
356    ptr1=ptr2+1;
357  }
358}
359
360/* Return the number of lines in 'f' */
361int owl_fmtext_num_lines(owl_fmtext *f)
362{
363  int lines, i;
364
365  if (f->textlen==0) return(0);
366 
367  lines=0;
368  for (i=0; i<f->textlen; i++) {
369    if (f->textbuff[i]=='\n') lines++;
370  }
371
372  /* if the last char wasn't a \n there's one more line */
373  if (f->textbuff[i-1]!='\n') lines++;
374
375  return(lines);
376}
377
378char *owl_fmtext_get_text(owl_fmtext *f)
379{
380  return(f->textbuff);
381}
382
383/* set the charater at 'index' to be 'char'.  If index is out of
384 * bounds don't do anything */
385void owl_fmtext_set_char(owl_fmtext *f, int index, int ch)
386{
387  if ((index < 0) || (index > f->textlen-1)) return;
388  f->textbuff[index]=ch;
389}
390
391/* Make a copy of the fmtext 'src' into 'dst' */
392void owl_fmtext_copy(owl_fmtext *dst, owl_fmtext *src)
393{
394  int mallocsize;
395
396  if (src->textlen==0) {
397    mallocsize=5;
398  } else {
399    mallocsize=src->textlen+2;
400  }
401  dst->textlen=src->textlen;
402  dst->textbuff=owl_malloc(mallocsize);
403  dst->fmbuff=owl_malloc(mallocsize);
404  dst->fgcolorbuff=owl_malloc(mallocsize);
405  dst->bgcolorbuff=owl_malloc(mallocsize);
406  memcpy(dst->textbuff, src->textbuff, src->textlen+1);
407  memcpy(dst->fmbuff, src->fmbuff, src->textlen);
408  memcpy(dst->fgcolorbuff, src->fgcolorbuff, src->textlen);
409  memcpy(dst->bgcolorbuff, src->bgcolorbuff, src->textlen);
410}
411
412/* highlight all instances of "string".  Return the number of
413 * instances found.  This is a case insensitive search.
414 */
415int owl_fmtext_search_and_highlight(owl_fmtext *f, char *string)
416{
417
418  int found, len;
419  char *ptr1, *ptr2;
420
421  len=strlen(string);
422  found=0;
423  ptr1=f->textbuff;
424  while (ptr1-f->textbuff <= f->textlen) {
425    ptr2=stristr(ptr1, string);
426    if (!ptr2) return(found);
427
428    found++;
429    _owl_fmtext_add_attr(f, OWL_FMTEXT_ATTR_REVERSE,
430                         ptr2 - f->textbuff,
431                         ptr2 - f->textbuff + len - 1);
432
433    ptr1=ptr2+len;
434  }
435  return(found);
436}
437
438/* return 1 if the string is found, 0 if not.  This is a case
439 *  insensitive search.
440 */
441int owl_fmtext_search(owl_fmtext *f, char *string)
442{
443
444  if (stristr(f->textbuff, string)) return(1);
445  return(0);
446}
447
448
449/* Append the text 'text' to 'f' and interpret the zephyr style
450 * formatting syntax to set appropriate attributes.
451 */
452void owl_fmtext_append_ztext(owl_fmtext *f, char *text)
453{
454  int stacksize, curattrs, curcolor;
455  char *ptr, *txtptr, *buff, *tmpptr;
456  int attrstack[32], chrstack[32];
457
458  curattrs=OWL_FMTEXT_ATTR_NONE;
459  curcolor=OWL_COLOR_DEFAULT;
460  stacksize=0;
461  txtptr=text;
462  while (1) {
463    ptr=strpbrk(txtptr, "@{[<()>]}");
464    if (!ptr) {
465      /* add all the rest of the text and exit */
466      owl_fmtext_append_attr(f, txtptr, curattrs, curcolor, OWL_COLOR_DEFAULT);
467      return;
468    } else if (ptr[0]=='@') {
469      /* add the text up to this point then deal with the stack */
470      buff=owl_malloc(ptr-txtptr+20);
471      strncpy(buff, txtptr, ptr-txtptr);
472      buff[ptr-txtptr]='\0';
473      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
474      owl_free(buff);
475
476      /* update pointer to point at the @ */
477      txtptr=ptr;
478
479      /* now the stack */
480
481      /* if we've hit our max stack depth, print the @ and move on */
482      if (stacksize==32) {
483        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
484        txtptr++;
485        continue;
486      }
487
488      /* if it's an @@, print an @ and continue */
489      if (txtptr[1]=='@') {
490        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
491        txtptr+=2;
492        continue;
493      }
494       
495      /* if there's no opener, print the @ and continue */
496      tmpptr=strpbrk(txtptr, "(<[{ ");
497      if (!tmpptr || tmpptr[0]==' ') {
498        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
499        txtptr++;
500        continue;
501      }
502
503      /* check what command we've got, push it on the stack, start
504         using it, and continue ... unless it's a color command */
505      buff=owl_malloc(tmpptr-ptr+20);
506      strncpy(buff, ptr, tmpptr-ptr);
507      buff[tmpptr-ptr]='\0';
508      if (!strcasecmp(buff, "@bold")) {
509        attrstack[stacksize]=OWL_FMTEXT_ATTR_BOLD;
510        chrstack[stacksize]=tmpptr[0];
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        stacksize++;
520        curattrs|=OWL_FMTEXT_ATTR_BOLD;
521        txtptr+=3;
522        owl_free(buff);
523        continue;
524      } else if (!strcasecmp(buff, "@i")) {
525        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
526        chrstack[stacksize]=tmpptr[0];
527        stacksize++;
528        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
529        txtptr+=3;
530        owl_free(buff);
531        continue;
532      } else if (!strcasecmp(buff, "@italic")) {
533        attrstack[stacksize]=OWL_FMTEXT_ATTR_UNDERLINE;
534        chrstack[stacksize]=tmpptr[0];
535        stacksize++;
536        curattrs|=OWL_FMTEXT_ATTR_UNDERLINE;
537        txtptr+=8;
538        owl_free(buff);
539        continue;
540
541        /* if it's a color read the color, set the current color and
542           continue */
543      } else if (!strcasecmp(buff, "@color") 
544                 && owl_global_get_hascolors(&g)
545                 && owl_global_is_colorztext(&g)) {
546        owl_free(buff);
547        txtptr+=7;
548        tmpptr=strpbrk(txtptr, "@{[<()>]}");
549        if (tmpptr &&
550            ((txtptr[-1]=='(' && tmpptr[0]==')') ||
551             (txtptr[-1]=='<' && tmpptr[0]=='>') ||
552             (txtptr[-1]=='[' && tmpptr[0]==']') ||
553             (txtptr[-1]=='{' && tmpptr[0]=='}'))) {
554
555          /* grab the color name */
556          buff=owl_malloc(tmpptr-txtptr+20);
557          strncpy(buff, txtptr, tmpptr-txtptr);
558          buff[tmpptr-txtptr]='\0';
559
560          /* set it as the current color */
561          curcolor=owl_util_string_to_color(buff);
562          if (curcolor==-1) curcolor=OWL_COLOR_DEFAULT;
563          owl_free(buff);
564          txtptr=tmpptr+1;
565          continue;
566
567        } else {
568
569        }
570
571      } else {
572        /* if we didn't understand it, we'll print it.  This is different from zwgc
573         * but zwgc seems to be smarter about some screw cases than I am
574         */
575        owl_fmtext_append_attr(f, "@", curattrs, curcolor, OWL_COLOR_DEFAULT);
576        txtptr++;
577        continue;
578      }
579
580    } else if (ptr[0]=='}' || ptr[0]==']' || ptr[0]==')' || ptr[0]=='>') {
581      /* add the text up to this point first */
582      buff=owl_malloc(ptr-txtptr+20);
583      strncpy(buff, txtptr, ptr-txtptr);
584      buff[ptr-txtptr]='\0';
585      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
586      owl_free(buff);
587
588      /* now deal with the closer */
589      txtptr=ptr;
590
591      /* first, if the stack is empty we must bail (just print and go) */
592      if (stacksize==0) {
593        buff=owl_malloc(5);
594        buff[0]=ptr[0];
595        buff[1]='\0';
596        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
597        owl_free(buff);
598        txtptr++;
599        continue;
600      }
601
602      /* if the closing char is what's on the stack, turn off the
603         attribue and pop the stack */
604      if ((ptr[0]==')' && chrstack[stacksize-1]=='(') ||
605          (ptr[0]=='>' && chrstack[stacksize-1]=='<') ||
606          (ptr[0]==']' && chrstack[stacksize-1]=='[') ||
607          (ptr[0]=='}' && chrstack[stacksize-1]=='{')) {
608        int i;
609        stacksize--;
610        curattrs=OWL_FMTEXT_ATTR_NONE;
611        for (i=0; i<stacksize; i++) {
612          curattrs|=attrstack[i];
613        }
614        txtptr+=1;
615        continue;
616      } else {
617        /* otherwise print and continue */
618        buff=owl_malloc(5);
619        buff[0]=ptr[0];
620        buff[1]='\0';
621        owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
622        owl_free(buff);
623        txtptr++;
624        continue;
625      }
626    } else {
627      /* we've found an unattached opener, print everything and move on */
628      buff=owl_malloc(ptr-txtptr+20);
629      strncpy(buff, txtptr, ptr-txtptr+1);
630      buff[ptr-txtptr+1]='\0';
631      owl_fmtext_append_attr(f, buff, curattrs, curcolor, OWL_COLOR_DEFAULT);
632      owl_free(buff);
633      txtptr=ptr+1;
634      continue;
635    }
636  }
637}
638
639/* requires that the list values are strings or NULL.
640 * joins the elements together with join_with.
641 * If format_fn is specified, passes it the list element value
642 * and it will return a string which this needs to free. */
643void owl_fmtext_append_list(owl_fmtext *f, owl_list *l, char *join_with, char *(format_fn)(void*))
644{
645  int i, size;
646  void *elem;
647  char *text;
648
649  size = owl_list_get_size(l);
650  for (i=0; i<size; i++) {
651    elem = (char*)owl_list_get_element(l,i);
652    if (elem && format_fn) {
653      text = format_fn(elem);
654      if (text) {
655        owl_fmtext_append_normal(f, text);
656        owl_free(text);
657      }
658    } else if (elem) {
659      owl_fmtext_append_normal(f, elem);
660    }
661    if ((i < size-1) && join_with) {
662      owl_fmtext_append_normal(f, join_with);
663    }
664  }
665}
666
667/* Free all memory allocated by the object */
668void owl_fmtext_free(owl_fmtext *f)
669{
670  if (f->textbuff) owl_free(f->textbuff);
671  if (f->fmbuff) owl_free(f->fmbuff);
672  if (f->fgcolorbuff) owl_free(f->fgcolorbuff);
673  if (f->bgcolorbuff) owl_free(f->bgcolorbuff);
674}
675
676/*** Color Pair manager ***/
677void owl_fmtext_init_colorpair_mgr(owl_colorpair_mgr *cpmgr)
678{
679  // This could be a bitarray if we wanted to save memory.
680  int i, j, colors;
681  cpmgr->next = COLORS;
682
683  colors = COLORS + 1; // 1 to account for "default".
684  cpmgr->pairs = owl_malloc(colors * sizeof(int*));
685  for(i = 0; i < colors; i++) {
686    // Because we're going to have a pair set for any fg and the
687    // default bg, we don't need to account for default here.
688    cpmgr->pairs[i] = owl_malloc(COLORS * sizeof(int));
689    for(j = 0; j < COLORS; j++) {
690      cpmgr->pairs[i][j] = -1;
691    }
692  }
693}
694
695/* Reset used list */
696void owl_fmtext_reset_colorpairs()
697{
698  int i, j, colors;
699  owl_colorpair_mgr *cpmgr = owl_global_get_colorpair_mgr(&g);
700  cpmgr->next = COLORS;
701
702  colors = COLORS + 1; // 1 to account for "default".
703  for(i = 0; i < colors; i++) {
704    for(j = 0; j < COLORS; j++) {
705      cpmgr->pairs[i][j] = -1;
706    }
707  }
708}
709
710/* Assign pairs by request */
711short owl_fmtext_get_colorpair(int fg, int bg)
712{
713  owl_colorpair_mgr *cpmgr;
714  short pair, default_bg;
715
716#ifdef HAVE_USE_DEFAULT_COLORS
717  if (fg == OWL_COLOR_DEFAULT) fg = -1;
718  default_bg = OWL_COLOR_DEFAULT;
719#else
720  if (fg == OWL_COLOR_DEFAULT) fg = 0;
721  if (bg == OWL_COLOR_DEFAULT) bg = 0;
722  default_bg = COLOR_BLACK;
723#endif
724
725  if (bg == default_bg) {
726    // default bg -> use color pairs initialized by owl.c
727    pair = fg;
728  } else {
729    // looking for a pair we already set up for this draw.
730    cpmgr = owl_global_get_colorpair_mgr(&g);
731    pair = cpmgr->pairs[fg+1][bg];
732    if (!(pair != -1 && pair < cpmgr->next)) {
733      // If we didn't find a pair, search for a free one to assign.
734      // Skip the first COLORS, since they're static.
735      // If we ever get 256 color curses, this will need more thought.
736      pair = (cpmgr->next < COLOR_PAIRS) ? cpmgr->next : -1;
737      if (pair != -1) {
738        // We found a free pair, initialize it.
739        init_pair(pair, fg, bg);
740        cpmgr->pairs[fg+1][bg] = pair;
741        cpmgr->next++;
742      } else {
743        // We still don't have a pair, drop the background color. Too bad.
744        pair = fg;
745      }
746    }
747  }
748  return pair;
749}
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