reactos/dll/win32/riched20/style.c

   1 /*
   2  * RichEdit style management functions
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "editor.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  24 WINE_DECLARE_DEBUG_CHANNEL(richedit_style);
  25
  26 static int all_refs = 0;
  27
  28 /* the following routines assume that:
  29  * - char2[AW] extends char[AW] by adding fields at the end of the charA form)
  30  * - szFaceName is the last field of char[AW] form, and wWeight the first of 2[AW]
  31  * - the difference between A and W form is the szFaceName as Ansi vs Unicode string
  32  * - because of alignment, offset of wWeight field in 2[AW] structure *IS NOT*
  33  *   sizeof(char[AW])
  34  */
  35
  36 CHARFORMAT2W *ME_ToCF2W(CHARFORMAT2W *to, CHARFORMAT2W *from)
  37 {
  38   if (from->cbSize == sizeof(CHARFORMATA))
  39   {
  40     CHARFORMATA *f = (CHARFORMATA *)from;
  41     CopyMemory(to, f, FIELD_OFFSET(CHARFORMATA, szFaceName));
  42     to->cbSize = sizeof(CHARFORMAT2W);
  43     if (f->dwMask & CFM_FACE) {
  44       MultiByteToWideChar(CP_ACP, 0, f->szFaceName, -1, to->szFaceName, sizeof(to->szFaceName)/sizeof(WCHAR));
  45     }
  46     return to;
  47   }
  48   if (from->cbSize == sizeof(CHARFORMATW))
  49   {
  50     CHARFORMATW *f = (CHARFORMATW *)from;
  51     CopyMemory(to, f, sizeof(*f));
  52     /* theoretically, we don't need to zero the remaining memory */
  53     ZeroMemory(&to->wWeight, sizeof(CHARFORMAT2W)-FIELD_OFFSET(CHARFORMAT2W, wWeight));
  54     to->cbSize = sizeof(CHARFORMAT2W);
  55     return to;
  56   }
  57   if (from->cbSize == sizeof(CHARFORMAT2A))
  58   {
  59     CHARFORMAT2A *f = (CHARFORMAT2A *)from;
  60     /* copy the A structure without face name */
  61     CopyMemory(to, f, FIELD_OFFSET(CHARFORMATA, szFaceName));
  62     /* convert face name */
  63     if (f->dwMask & CFM_FACE)
  64       MultiByteToWideChar(CP_ACP, 0, f->szFaceName, -1, to->szFaceName, sizeof(to->szFaceName)/sizeof(WCHAR));
  65     /* copy the rest of the 2A structure to 2W */
  66     CopyMemory(&to->wWeight, &f->wWeight, sizeof(CHARFORMAT2A)-FIELD_OFFSET(CHARFORMAT2A, wWeight));
  67     to->cbSize = sizeof(CHARFORMAT2W);
  68     return to;
  69   }
  70
  71   return (from->cbSize >= sizeof(CHARFORMAT2W)) ? from : NULL;
  72 }
  73
  74 static CHARFORMAT2W *ME_ToCFAny(CHARFORMAT2W *to, CHARFORMAT2W *from)
  75 {
  76   assert(from->cbSize == sizeof(CHARFORMAT2W));
  77   if (to->cbSize == sizeof(CHARFORMATA))
  78   {
  79     CHARFORMATA *t = (CHARFORMATA *)to;
  80     CopyMemory(t, from, FIELD_OFFSET(CHARFORMATA, szFaceName));
  81     WideCharToMultiByte(CP_ACP, 0, from->szFaceName, -1, t->szFaceName, sizeof(t->szFaceName), NULL, NULL);
  82     if (from->dwMask & CFM_UNDERLINETYPE)
  83     {
  84         switch (from->bUnderlineType)
  85         {
  86         case CFU_CF1UNDERLINE:
  87             to->dwMask |= CFM_UNDERLINE;
  88             to->dwEffects |= CFE_UNDERLINE;
  89             break;
  90         case CFU_UNDERLINENONE:
  91             to->dwMask |= CFM_UNDERLINE;
  92             to->dwEffects &= ~CFE_UNDERLINE;
  93             break;
  94         }
  95     }
  96     t->cbSize = sizeof(*t); /* it was overwritten by CopyMemory */
  97     return to;
  98   }
  99   if (to->cbSize == sizeof(CHARFORMATW))
 100   {
 101     CHARFORMATW *t = (CHARFORMATW *)to;
 102     CopyMemory(t, from, sizeof(*t));
 103     if (from->dwMask & CFM_UNDERLINETYPE)
 104     {
 105         switch (from->bUnderlineType)
 106         {
 107         case CFU_CF1UNDERLINE:
 108             to->dwMask |= CFM_UNDERLINE;
 109             to->dwEffects |= CFE_UNDERLINE;
 110             break;
 111         case CFU_UNDERLINENONE:
 112             to->dwMask |= CFM_UNDERLINE;
 113             to->dwEffects &= ~CFE_UNDERLINE;
 114             break;
 115         }
 116     }
 117     t->cbSize = sizeof(*t); /* it was overwritten by CopyMemory */
 118     return to;
 119   }
 120   if (to->cbSize == sizeof(CHARFORMAT2A))
 121   {
 122     CHARFORMAT2A *t = (CHARFORMAT2A *)to;
 123     /* copy the A structure without face name */
 124     CopyMemory(t, from, FIELD_OFFSET(CHARFORMATA, szFaceName));
 125     /* convert face name */
 126     WideCharToMultiByte(CP_ACP, 0, from->szFaceName, -1, t->szFaceName, sizeof(t->szFaceName), NULL, NULL);
 127     /* copy the rest of the 2A structure to 2W */
 128     CopyMemory(&t->wWeight, &from->wWeight, sizeof(CHARFORMAT2W)-FIELD_OFFSET(CHARFORMAT2W,wWeight));
 129     t->cbSize = sizeof(*t); /* it was overwritten by CopyMemory */
 130     return to;
 131   }
 132   assert(to->cbSize >= sizeof(CHARFORMAT2W));
 133   return from;
 134 }
 135
 136 void ME_CopyToCFAny(CHARFORMAT2W *to, CHARFORMAT2W *from)
 137 {
 138   if (ME_ToCFAny(to, from) == from)
 139     CopyMemory(to, from, to->cbSize);
 140 }
 141
 142 ME_Style *ME_MakeStyle(CHARFORMAT2W *style)
 143 {
 144   ME_Style *s = ALLOC_OBJ(ME_Style);
 145
 146   assert(style->cbSize == sizeof(CHARFORMAT2W));
 147   s->fmt = *style;
 148   s->nRefs = 1;
 149   s->hFont = NULL;
 150   memset(&s->tm, 0, sizeof(s->tm));
 151   s->tm.tmAscent = -1;
 152   all_refs++;
 153   TRACE_(richedit_style)("ME_MakeStyle %p, total refs=%d\n", s, all_refs);
 154   return s;
 155 }
 156
 157 #define COPY_STYLE_ITEM(mask, member) \
 158   if (style->dwMask & mask) { \
 159     s->fmt.dwMask |= mask;\
 160     s->fmt.member = style->member;\
 161   }
 162
 163 #define COPY_STYLE_ITEM_MEMCPY(mask, member) \
 164   if (style->dwMask & mask) { \
 165     s->fmt.dwMask |= mask;\
 166     CopyMemory(s->fmt.member, style->member, sizeof(style->member));\
 167   }
 168
 169 void ME_InitCharFormat2W(CHARFORMAT2W *pFmt)
 170 {
 171   ZeroMemory(pFmt, sizeof(CHARFORMAT2W));
 172   pFmt->cbSize = sizeof(CHARFORMAT2W);
 173 }
 174
 175 ME_Style *ME_ApplyStyle(ME_Style *sSrc, CHARFORMAT2W *style)
 176 {
 177   ME_Style *s = ME_MakeStyle(&sSrc->fmt);
 178   assert(style->cbSize == sizeof(CHARFORMAT2W));
 179   COPY_STYLE_ITEM(CFM_ANIMATION, bAnimation);
 180   COPY_STYLE_ITEM(CFM_BACKCOLOR, crBackColor);
 181   COPY_STYLE_ITEM(CFM_CHARSET, bCharSet);
 182   COPY_STYLE_ITEM(CFM_COLOR, crTextColor);
 183   COPY_STYLE_ITEM_MEMCPY(CFM_FACE, szFaceName);
 184   COPY_STYLE_ITEM(CFM_KERNING, wKerning);
 185   COPY_STYLE_ITEM(CFM_LCID, lcid);
 186   COPY_STYLE_ITEM(CFM_OFFSET, yOffset);
 187   COPY_STYLE_ITEM(CFM_REVAUTHOR, bRevAuthor);
 188   if (style->dwMask & CFM_SIZE) {
 189     s->fmt.dwMask |= CFM_SIZE;
 190     s->fmt.yHeight = min(style->yHeight, yHeightCharPtsMost * 20);
 191   }
 192   COPY_STYLE_ITEM(CFM_SPACING, sSpacing);
 193   COPY_STYLE_ITEM(CFM_STYLE, sStyle);
 194   COPY_STYLE_ITEM(CFM_UNDERLINETYPE, bUnderlineType);
 195   COPY_STYLE_ITEM(CFM_WEIGHT, wWeight);
 196   /* FIXME: this is not documented this way, but that's the more logical */
 197   COPY_STYLE_ITEM(CFM_FACE, bPitchAndFamily);
 198
 199   s->fmt.dwEffects &= ~(style->dwMask);
 200   s->fmt.dwEffects |= style->dwEffects & style->dwMask;
 201   s->fmt.dwMask |= style->dwMask;
 202   if (style->dwMask & CFM_COLOR)
 203   {
 204     if (style->dwEffects & CFE_AUTOCOLOR)
 205       s->fmt.dwEffects |= CFE_AUTOCOLOR;
 206     else
 207       s->fmt.dwEffects &= ~CFE_AUTOCOLOR;
 208   }
 209   if (style->dwMask & CFM_UNDERLINE)
 210   {
 211       s->fmt.dwMask |= CFM_UNDERLINETYPE;
 212       s->fmt.bUnderlineType = (style->dwEffects & CFM_UNDERLINE) ?
 213           CFU_CF1UNDERLINE : CFU_UNDERLINENONE;
 214   }
 215   if (style->dwMask & CFM_BOLD && !(style->dwMask & CFM_WEIGHT))
 216   {
 217       s->fmt.wWeight = (style->dwEffects & CFE_BOLD) ? FW_BOLD : FW_NORMAL;
 218   } else if (style->dwMask & CFM_WEIGHT && !(style->dwMask & CFM_BOLD)) {
 219       if (style->wWeight > FW_NORMAL)
 220           s->fmt.dwEffects |= CFE_BOLD;
 221       else
 222           s->fmt.dwEffects &= ~CFE_BOLD;
 223   }
 224   return s;
 225 }
 226
 227 void ME_CopyCharFormat(CHARFORMAT2W *pDest, const CHARFORMAT2W *pSrc)
 228 {
 229   /* using this with non-2W structs is forbidden */
 230   assert(pSrc->cbSize == sizeof(CHARFORMAT2W));
 231   assert(pDest->cbSize == sizeof(CHARFORMAT2W));
 232   *pDest = *pSrc;
 233 }
 234
 235 static void ME_DumpStyleEffect(char **p, const char *name, const CHARFORMAT2W *fmt, int mask)
 236 {
 237   *p += sprintf(*p, "%-22s%s\n", name, (fmt->dwMask & mask) ? ((fmt->dwEffects & mask) ? "YES" : "no") : "N/A");
 238 }
 239
 240 void ME_DumpStyle(ME_Style *s)
 241 {
 242   char buf[2048];
 243   ME_DumpStyleToBuf(&s->fmt, buf);
 244   TRACE_(richedit_style)("%s\n", buf);
 245 }
 246
 247 void ME_DumpStyleToBuf(CHARFORMAT2W *pFmt, char buf[2048])
 248 {
 249   /* FIXME only CHARFORMAT styles implemented */
 250   /* this function sucks, doesn't check for buffer overruns but it's "good enough" as for debug code */
 251   char *p;
 252   p = buf;
 253   p += sprintf(p, "Font face:            ");
 254   if (pFmt->dwMask & CFM_FACE) {
 255     WCHAR *q = pFmt->szFaceName;
 256     while(*q) {
 257       *p++ = (*q > 255) ? '?' : *q;
 258       q++;
 259     }
 260   } else
 261     p += sprintf(p, "N/A");
 262
 263   if (pFmt->dwMask & CFM_SIZE)
 264     p += sprintf(p, "\nFont size:            %d\n", pFmt->yHeight);
 265   else
 266     p += sprintf(p, "\nFont size:            N/A\n");
 267
 268   if (pFmt->dwMask & CFM_OFFSET)
 269     p += sprintf(p, "Char offset:          %d\n", pFmt->yOffset);
 270   else
 271     p += sprintf(p, "Char offset:          N/A\n");
 272
 273   if (pFmt->dwMask & CFM_CHARSET)
 274     p += sprintf(p, "Font charset:         %d\n", (int)pFmt->bCharSet);
 275   else
 276     p += sprintf(p, "Font charset:         N/A\n");
 277
 278   /* I'm assuming CFM_xxx and CFE_xxx are the same values, fortunately it IS true wrt used flags*/
 279   ME_DumpStyleEffect(&p, "Font bold:", pFmt, CFM_BOLD);
 280   ME_DumpStyleEffect(&p, "Font italic:", pFmt, CFM_ITALIC);
 281   ME_DumpStyleEffect(&p, "Font underline:", pFmt, CFM_UNDERLINE);
 282   ME_DumpStyleEffect(&p, "Font strikeout:", pFmt, CFM_STRIKEOUT);
 283   ME_DumpStyleEffect(&p, "Hidden text:", pFmt, CFM_HIDDEN);
 284   p += sprintf(p, "Text color:           ");
 285   if (pFmt->dwMask & CFM_COLOR)
 286   {
 287     if (pFmt->dwEffects & CFE_AUTOCOLOR)
 288       p += sprintf(p, "auto\n");
 289     else
 290       p += sprintf(p, "%06x\n", (int)pFmt->crTextColor);
 291   }
 292   else
 293     p += sprintf(p, "N/A\n");
 294   ME_DumpStyleEffect(&p, "Text protected:", pFmt, CFM_PROTECTED);
 295 }
 296
 297
 298 static void
 299 ME_LogFontFromStyle(ME_Context* c, LOGFONTW *lf, const ME_Style *s)
 300 {
 301   ZeroMemory(lf, sizeof(LOGFONTW));
 302   lstrcpyW(lf->lfFaceName, s->fmt.szFaceName);
 303
 304   lf->lfHeight = ME_twips2pointsY(c, -s->fmt.yHeight);
 305
 306   lf->lfWeight = FW_NORMAL;
 307   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_BOLD)
 308     lf->lfWeight = FW_BOLD;
 309   if (s->fmt.dwMask & CFM_WEIGHT)
 310     lf->lfWeight = s->fmt.wWeight;
 311   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_ITALIC)
 312     lf->lfItalic = 1;
 313   if (s->fmt.dwEffects & s->fmt.dwMask & (CFM_UNDERLINE | CFE_LINK))
 314     lf->lfUnderline = 1;
 315   if (s->fmt.dwMask & CFM_UNDERLINETYPE && s->fmt.bUnderlineType == CFU_CF1UNDERLINE)
 316     lf->lfUnderline = 1;
 317   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_STRIKEOUT)
 318     lf->lfStrikeOut = 1;
 319   if (s->fmt.dwEffects & s->fmt.dwMask & (CFM_SUBSCRIPT|CFM_SUPERSCRIPT))
 320     lf->lfHeight = (lf->lfHeight*2)/3;
 321 /*lf.lfQuality = PROOF_QUALITY; */
 322   if (s->fmt.dwMask & CFM_FACE)
 323     lf->lfPitchAndFamily = s->fmt.bPitchAndFamily;
 324   if (s->fmt.dwMask & CFM_CHARSET)
 325     lf->lfCharSet = s->fmt.bCharSet;
 326 }
 327
 328 void ME_CharFormatFromLogFont(HDC hDC, const LOGFONTW *lf, CHARFORMAT2W *fmt)
 329 {
 330   int ry;
 331
 332   ME_InitCharFormat2W(fmt);
 333   ry = GetDeviceCaps(hDC, LOGPIXELSY);
 334   lstrcpyW(fmt->szFaceName, lf->lfFaceName);
 335   fmt->dwEffects = 0;
 336   fmt->dwMask = CFM_WEIGHT|CFM_BOLD|CFM_ITALIC|CFM_UNDERLINE|CFM_STRIKEOUT|CFM_SIZE|CFM_FACE|CFM_CHARSET;
 337   fmt->wWeight = lf->lfWeight;
 338   fmt->yHeight = -lf->lfHeight*1440/ry;
 339   if (lf->lfWeight > FW_NORMAL) fmt->dwEffects |= CFM_BOLD;
 340   if (lf->lfItalic) fmt->dwEffects |= CFM_ITALIC;
 341   if (lf->lfUnderline) fmt->dwEffects |= CFM_UNDERLINE;
 342   /* notice that if a logfont was created with underline due to CFM_LINK, this
 343       would add an erroneous CFM_UNDERLINE. This isn't currently ever a problem. */
 344   if (lf->lfStrikeOut) fmt->dwEffects |= CFM_STRIKEOUT;
 345   fmt->bPitchAndFamily = lf->lfPitchAndFamily;
 346   fmt->bCharSet = lf->lfCharSet;
 347 }
 348
 349 static BOOL ME_IsFontEqual(const LOGFONTW *p1, const LOGFONTW *p2)
 350 {
 351   if (memcmp(p1, p2, sizeof(LOGFONTW)-sizeof(p1->lfFaceName)))
 352     return FALSE;
 353   if (lstrcmpW(p1->lfFaceName, p2->lfFaceName))
 354     return FALSE;
 355   return TRUE;
 356 }
 357
 358 HFONT ME_SelectStyleFont(ME_Context *c, ME_Style *s)
 359 {
 360   HFONT hOldFont;
 361   LOGFONTW lf;
 362   int i, nEmpty, nAge = 0x7FFFFFFF;
 363   ME_FontCacheItem *item;
 364   assert(s);
 365
 366   ME_LogFontFromStyle(c, &lf, s);
 367
 368   for (i=0; i<HFONT_CACHE_SIZE; i++)
 369     c->editor->pFontCache[i].nAge++;
 370   for (i=0, nEmpty=-1, nAge=0; i<HFONT_CACHE_SIZE; i++)
 371   {
 372     item = &c->editor->pFontCache[i];
 373     if (!item->nRefs)
 374     {
 375       if (item->nAge > nAge)
 376         nEmpty = i, nAge = item->nAge;
 377     }
 378     if (item->hFont && ME_IsFontEqual(&item->lfSpecs, &lf))
 379       break;
 380   }
 381   if (i < HFONT_CACHE_SIZE) /* found */
 382   {
 383     item = &c->editor->pFontCache[i];
 384     TRACE_(richedit_style)("font reused %d\n", i);
 385
 386     s->hFont = item->hFont;
 387     item->nRefs++;
 388   }
 389   else
 390   {
 391     item = &c->editor->pFontCache[nEmpty]; /* this legal even when nEmpty == -1, as we don't dereference it */
 392
 393     assert(nEmpty != -1); /* otherwise we leak cache entries or get too many fonts at once*/
 394     if (item->hFont) {
 395       TRACE_(richedit_style)("font deleted %d\n", nEmpty);
 396       DeleteObject(item->hFont);
 397       item->hFont = NULL;
 398     }
 399     s->hFont = CreateFontIndirectW(&lf);
 400     assert(s->hFont);
 401     TRACE_(richedit_style)("font created %d\n", nEmpty);
 402     item->hFont = s->hFont;
 403     item->nRefs = 1;
 404     item->lfSpecs = lf;
 405   }
 406   hOldFont = SelectObject(c->hDC, s->hFont);
 407   /* should be cached too, maybe ? */
 408   GetTextMetricsW(c->hDC, &s->tm);
 409   return hOldFont;
 410 }
 411
 412 void ME_UnselectStyleFont(ME_Context *c, ME_Style *s, HFONT hOldFont)
 413 {
 414   int i;
 415
 416   assert(s);
 417   SelectObject(c->hDC, hOldFont);
 418   for (i=0; i<HFONT_CACHE_SIZE; i++)
 419   {
 420     ME_FontCacheItem *pItem = &c->editor->pFontCache[i];
 421     if (pItem->hFont == s->hFont && pItem->nRefs > 0)
 422     {
 423       pItem->nRefs--;
 424       pItem->nAge = 0;
 425       s->hFont = NULL;
 426       return;
 427     }
 428   }
 429   assert(0 == "UnselectStyleFont without SelectStyleFont");
 430 }
 431
 432 static void ME_DestroyStyle(ME_Style *s) {
 433   if (s->hFont)
 434   {
 435     DeleteObject(s->hFont);
 436     s->hFont = NULL;
 437   }
 438   FREE_OBJ(s);
 439 }
 440
 441 void ME_AddRefStyle(ME_Style *s)
 442 {
 443   assert(s->nRefs>0); /* style with 0 references isn't supposed to exist */
 444   s->nRefs++;
 445   all_refs++;
 446   TRACE_(richedit_style)("ME_AddRefStyle %p, new refs=%d, total refs=%d\n", s, s->nRefs, all_refs);
 447 }
 448
 449 void ME_ReleaseStyle(ME_Style *s)
 450 {
 451   s->nRefs--;
 452   all_refs--;
 453   if (s->nRefs==0)
 454     TRACE_(richedit_style)("destroy style %p, total refs=%d\n", s, all_refs);
 455   else
 456     TRACE_(richedit_style)("release style %p, new refs=%d, total refs=%d\n", s, s->nRefs, all_refs);
 457   if (!all_refs) TRACE("all style references freed (good!)\n");
 458   assert(s->nRefs>=0);
 459   if (!s->nRefs)
 460     ME_DestroyStyle(s);
 461 }
 462
 463 ME_Style *ME_GetInsertStyle(ME_TextEditor *editor, int nCursor)
 464 {
 465   if (ME_IsSelection(editor))
 466   {
 467     ME_Cursor *from, *to;
 468
 469     ME_GetSelection(editor, &from, &to);
 470     ME_AddRefStyle(from->pRun->member.run.style);
 471     return from->pRun->member.run.style;
 472   }
 473   if (editor->pBuffer->pCharStyle) {
 474     ME_AddRefStyle(editor->pBuffer->pCharStyle);
 475     return editor->pBuffer->pCharStyle;
 476   }
 477   else
 478   {
 479     ME_Cursor *pCursor = &editor->pCursors[nCursor];
 480     ME_DisplayItem *pRunItem = pCursor->pRun;
 481     ME_DisplayItem *pPrevItem = NULL;
 482     if (pCursor->nOffset) {
 483       ME_Run *pRun = &pRunItem->member.run;
 484       ME_AddRefStyle(pRun->style);
 485       return pRun->style;
 486     }
 487     pPrevItem = ME_FindItemBack(pRunItem, diRunOrParagraph);
 488     if (pPrevItem->type == diRun)
 489     {
 490       ME_AddRefStyle(pPrevItem->member.run.style);
 491       return pPrevItem->member.run.style;
 492     }
 493     else
 494     {
 495       ME_AddRefStyle(pRunItem->member.run.style);
 496       return pRunItem->member.run.style;
 497     }
 498   }
 499 }
 500
 501 void ME_SaveTempStyle(ME_TextEditor *editor)
 502 {
 503   ME_Style *old_style = editor->pBuffer->pCharStyle;
 504   editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
 505   if (old_style)
 506     ME_ReleaseStyle(old_style);
 507 }
 508
 509 void ME_ClearTempStyle(ME_TextEditor *editor)
 510 {
 511   if (!editor->pBuffer->pCharStyle) return;
 512   ME_ReleaseStyle(editor->pBuffer->pCharStyle);
 513   editor->pBuffer->pCharStyle = NULL;
 514 }