reactos/dll/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 CHARFORMAT2W *ME_ToCF2W(CHARFORMAT2W *to, CHARFORMAT2W *from)
  29 {
  30   if (from->cbSize == sizeof(CHARFORMATA))
  31   {
  32     CHARFORMATA *f = (CHARFORMATA *)from;
  33     CopyMemory(to, f, sizeof(*f)-sizeof(f->szFaceName));
  34     to->cbSize = sizeof(CHARFORMAT2W);
  35     if (f->dwMask & CFM_FACE) {
  36       MultiByteToWideChar(0, 0, f->szFaceName, -1, to->szFaceName, sizeof(to->szFaceName)/sizeof(WCHAR));
  37     }
  38     return to;
  39   }
  40   if (from->cbSize == sizeof(CHARFORMATW))
  41   {
  42     CHARFORMATW *f = (CHARFORMATW *)from;
  43     CopyMemory(to, f, sizeof(*f));
  44     /* theoretically, we don't need to zero the remaining memory */
  45     ZeroMemory(((CHARFORMATW *)to)+1, sizeof(CHARFORMAT2W)-sizeof(CHARFORMATW));
  46     to->cbSize = sizeof(CHARFORMAT2W);
  47     return to;
  48   }
  49   if (from->cbSize == sizeof(CHARFORMAT2A))
  50   {
  51     CHARFORMATA *f = (CHARFORMATA *)from;
  52     /* copy the A structure without face name */
  53     CopyMemory(to, f, sizeof(CHARFORMATA)-sizeof(f->szFaceName));
  54     /* convert face name */
  55     if (f->dwMask & CFM_FACE)
  56       MultiByteToWideChar(0, 0, f->szFaceName, -1, to->szFaceName, sizeof(to->szFaceName)/sizeof(WCHAR));
  57     /* copy the rest of the 2A structure to 2W */
  58     CopyMemory(1+((CHARFORMATW *)to), f+1, sizeof(CHARFORMAT2A)-sizeof(CHARFORMATA));
  59     to->cbSize = sizeof(CHARFORMAT2W);
  60     return to;
  61   }
  62
  63   assert(from->cbSize >= sizeof(CHARFORMAT2W));
  64   return from;
  65 }
  66
  67 void ME_CopyToCF2W(CHARFORMAT2W *to, CHARFORMAT2W *from)
  68 {
  69   if (ME_ToCF2W(to, from) == from)
  70     CopyMemory(to, from, sizeof(*from));
  71 }
  72
  73 CHARFORMAT2W *ME_ToCFAny(CHARFORMAT2W *to, CHARFORMAT2W *from)
  74 {
  75   assert(from->cbSize == sizeof(CHARFORMAT2W));
  76   if (to->cbSize == sizeof(CHARFORMATA))
  77   {
  78     CHARFORMATA *t = (CHARFORMATA *)to;
  79     CopyMemory(t, from, sizeof(*t)-sizeof(t->szFaceName));
  80     WideCharToMultiByte(0, 0, from->szFaceName, -1, t->szFaceName, sizeof(t->szFaceName), 0, 0);
  81     t->cbSize = sizeof(*t); /* it was overwritten by CopyMemory */
  82     return to;
  83   }
  84   if (to->cbSize == sizeof(CHARFORMATW))
  85   {
  86     CHARFORMATW *t = (CHARFORMATW *)to;
  87     CopyMemory(t, from, sizeof(*t));
  88     t->cbSize = sizeof(*t); /* it was overwritten by CopyMemory */
  89     return to;
  90   }
  91   if (to->cbSize == sizeof(CHARFORMAT2A))
  92   {
  93     CHARFORMAT2A *t = (CHARFORMAT2A *)to;
  94     /* copy the A structure without face name */
  95     CopyMemory(t, from, sizeof(CHARFORMATA)-sizeof(t->szFaceName));
  96     /* convert face name */
  97     WideCharToMultiByte(0, 0, from->szFaceName, -1, t->szFaceName, sizeof(t->szFaceName), 0, 0);
  98     /* copy the rest of the 2A structure to 2W */
  99     CopyMemory(&t->wWeight, &from->wWeight, sizeof(CHARFORMAT2A)-sizeof(CHARFORMATA));
 100     t->cbSize = sizeof(*t); /* it was overwritten by CopyMemory */
 101     return to;
 102   }
 103   assert(to->cbSize >= sizeof(CHARFORMAT2W));
 104   return from;
 105 }
 106
 107 void ME_CopyToCFAny(CHARFORMAT2W *to, CHARFORMAT2W *from)
 108 {
 109   if (ME_ToCFAny(to, from) == from)
 110     CopyMemory(to, from, to->cbSize);
 111 }
 112
 113 ME_Style *ME_MakeStyle(CHARFORMAT2W *style) {
 114   CHARFORMAT2W styledata;
 115   ME_Style *s = ALLOC_OBJ(ME_Style);
 116
 117   style = ME_ToCF2W(&styledata, style);
 118   memset(s, 0, sizeof(ME_Style));
 119   if (style->cbSize <= sizeof(CHARFORMAT2W))
 120     CopyMemory(&s->fmt, style, style->cbSize);
 121   else
 122     CopyMemory(&s->fmt, style, sizeof(CHARFORMAT2W));
 123   s->fmt.cbSize = sizeof(CHARFORMAT2W);
 124
 125   s->nSequence = -2;
 126   s->nRefs = 1;
 127   s->hFont = NULL;
 128   s->tm.tmAscent = -1;
 129   all_refs++;
 130   return s;
 131 }
 132
 133 #define COPY_STYLE_ITEM(mask, member) \
 134   if (style->dwMask & mask) { \
 135     s->fmt.dwMask |= mask;\
 136     s->fmt.member = style->member;\
 137   }
 138
 139 #define COPY_STYLE_ITEM_MEMCPY(mask, member) \
 140   if (style->dwMask & mask) { \
 141     s->fmt.dwMask |= mask;\
 142     CopyMemory(s->fmt.member, style->member, sizeof(style->member));\
 143   }
 144
 145 void ME_InitCharFormat2W(CHARFORMAT2W *pFmt)
 146 {
 147   ZeroMemory(pFmt, sizeof(CHARFORMAT2W));
 148   pFmt->cbSize = sizeof(CHARFORMAT2W);
 149 }
 150
 151 ME_Style *ME_ApplyStyle(ME_Style *sSrc, CHARFORMAT2W *style)
 152 {
 153   CHARFORMAT2W styledata;
 154   ME_Style *s = ME_MakeStyle(&sSrc->fmt);
 155   style = ME_ToCF2W(&styledata, style);
 156   COPY_STYLE_ITEM(CFM_ANIMATION, bAnimation);
 157   COPY_STYLE_ITEM(CFM_BACKCOLOR, crBackColor);
 158   COPY_STYLE_ITEM(CFM_CHARSET, bCharSet);
 159   COPY_STYLE_ITEM(CFM_COLOR, crTextColor);
 160   COPY_STYLE_ITEM_MEMCPY(CFM_FACE, szFaceName);
 161   COPY_STYLE_ITEM(CFM_KERNING, wKerning);
 162   COPY_STYLE_ITEM(CFM_LCID, lcid);
 163   COPY_STYLE_ITEM(CFM_OFFSET, yOffset);
 164   COPY_STYLE_ITEM(CFM_REVAUTHOR, bRevAuthor);
 165   COPY_STYLE_ITEM(CFM_SIZE, yHeight);
 166   COPY_STYLE_ITEM(CFM_SPACING, sSpacing);
 167   COPY_STYLE_ITEM(CFM_STYLE, sStyle);
 168   COPY_STYLE_ITEM(CFM_UNDERLINETYPE, bUnderlineType);
 169   COPY_STYLE_ITEM(CFM_WEIGHT, wWeight);
 170
 171   s->fmt.dwEffects &= ~(style->dwMask);
 172   s->fmt.dwEffects |= style->dwEffects & style->dwMask;
 173   s->fmt.dwMask |= style->dwMask;
 174   if (style->dwMask & CFM_COLOR)
 175   {
 176     if (style->dwEffects & CFE_AUTOCOLOR)
 177       s->fmt.dwEffects |= CFE_AUTOCOLOR;
 178     else
 179       s->fmt.dwEffects &= ~CFE_AUTOCOLOR;
 180   }
 181   return s;
 182 }
 183
 184 void ME_CopyCharFormat(CHARFORMAT2W *pDest, CHARFORMAT2W *pSrc)
 185 {
 186   /* using this with non-2W structs is forbidden */
 187   assert(pSrc->cbSize == sizeof(CHARFORMAT2W));
 188   assert(pDest->cbSize == sizeof(CHARFORMAT2W));
 189   CopyMemory(pDest, pSrc, sizeof(CHARFORMAT2W));
 190 }
 191
 192 static void ME_DumpStyleEffect(char **p, const char *name, CHARFORMAT2W *fmt, int mask)
 193 {
 194   *p += sprintf(*p, "%-22s%s\n", name, (fmt->dwMask & mask) ? ((fmt->dwEffects & mask) ? "YES" : "no") : "N/A");
 195 }
 196
 197 void ME_DumpStyle(ME_Style *s)
 198 {
 199   char buf[2048];
 200   ME_DumpStyleToBuf(&s->fmt, buf);
 201   TRACE_(richedit_style)("%s\n", buf);
 202 }
 203
 204 void ME_DumpStyleToBuf(CHARFORMAT2W *pFmt, char buf[2048])
 205 {
 206   /* FIXME only CHARFORMAT styles implemented */
 207   /* this function sucks, doesn't check for buffer overruns but it's "good enough" as for debug code */
 208   char *p;
 209   p = buf;
 210   p += sprintf(p, "Font face:            ");
 211   if (pFmt->dwMask & CFM_FACE) {
 212     WCHAR *q = pFmt->szFaceName;
 213     while(*q) {
 214       *p++ = (*q > 255) ? '?' : *q;
 215       q++;
 216     }
 217   } else
 218     p += sprintf(p, "N/A");
 219
 220   if (pFmt->dwMask & CFM_SIZE)
 221     p += sprintf(p, "\nFont size:            %d\n", (int)pFmt->yHeight);
 222   else
 223     p += sprintf(p, "\nFont size:            N/A\n");
 224
 225   if (pFmt->dwMask & CFM_OFFSET)
 226     p += sprintf(p, "Char offset:          %d\n", (int)pFmt->yOffset);
 227   else
 228     p += sprintf(p, "Char offset:          N/A\n");
 229
 230   if (pFmt->dwMask & CFM_CHARSET)
 231     p += sprintf(p, "Font charset:         %d\n", (int)pFmt->bCharSet);
 232   else
 233     p += sprintf(p, "Font charset:         N/A\n");
 234
 235   /* I'm assuming CFM_xxx and CFE_xxx are the same values, fortunately it IS true wrt used flags*/
 236   ME_DumpStyleEffect(&p, "Font bold:", pFmt, CFM_BOLD);
 237   ME_DumpStyleEffect(&p, "Font italic:", pFmt, CFM_ITALIC);
 238   ME_DumpStyleEffect(&p, "Font underline:", pFmt, CFM_UNDERLINE);
 239   ME_DumpStyleEffect(&p, "Font strikeout:", pFmt, CFM_STRIKEOUT);
 240   p += sprintf(p, "Text color:           ");
 241   if (pFmt->dwMask & CFM_COLOR)
 242   {
 243     if (pFmt->dwEffects & CFE_AUTOCOLOR)
 244       p += sprintf(p, "auto\n");
 245     else
 246       p += sprintf(p, "%06x\n", (int)pFmt->crTextColor);
 247   }
 248   else
 249     p += sprintf(p, "N/A\n");
 250   ME_DumpStyleEffect(&p, "Text protected:", pFmt, CFM_PROTECTED);
 251 }
 252
 253
 254 static void
 255 ME_LogFontFromStyle(HDC hDC, LOGFONTW *lf, ME_Style *s, int nZoomNumerator, int nZoomDenominator)
 256 {
 257   int rx, ry;
 258   rx = GetDeviceCaps(hDC, LOGPIXELSX);
 259   ry = GetDeviceCaps(hDC, LOGPIXELSY);
 260   ZeroMemory(lf, sizeof(LOGFONTW));
 261   lstrcpyW(lf->lfFaceName, s->fmt.szFaceName);
 262
 263   if (nZoomNumerator == 0)
 264   {
 265     nZoomNumerator = 1;
 266     nZoomDenominator = 1;
 267   }
 268   lf->lfHeight = -s->fmt.yHeight*ry*nZoomNumerator/nZoomDenominator/1440;
 269
 270   lf->lfWeight = 400;
 271   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_BOLD)
 272     lf->lfWeight = 700;
 273   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_WEIGHT)
 274     lf->lfWeight = s->fmt.wWeight;
 275   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_ITALIC)
 276     lf->lfItalic = 1;
 277   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_UNDERLINE)
 278     lf->lfUnderline = 1;
 279   if (s->fmt.dwEffects & s->fmt.dwMask & CFM_STRIKEOUT)
 280     lf->lfStrikeOut = 1;
 281   if (s->fmt.dwEffects & s->fmt.dwMask & (CFM_SUBSCRIPT|CFM_SUPERSCRIPT))
 282     lf->lfHeight = (lf->lfHeight*2)/3;
 283 /*lf.lfQuality = PROOF_QUALITY; */
 284   lf->lfPitchAndFamily = s->fmt.bPitchAndFamily;
 285   lf->lfCharSet = s->fmt.bCharSet;
 286 }
 287
 288
 289 BOOL ME_IsFontEqual(LOGFONTW *p1, LOGFONTW *p2)
 290 {
 291   if (memcmp(p1, p2, sizeof(LOGFONTW)-sizeof(p1->lfFaceName)))
 292     return FALSE;
 293   if (lstrcmpW(p1->lfFaceName, p2->lfFaceName))
 294     return FALSE;
 295   return TRUE;
 296 }
 297
 298 HFONT ME_SelectStyleFont(ME_TextEditor *editor, HDC hDC, ME_Style *s)
 299 {
 300   HFONT hOldFont;
 301   LOGFONTW lf;
 302   int i, nEmpty, nAge = 0x7FFFFFFF;
 303   ME_FontCacheItem *item;
 304   assert(hDC);
 305   assert(s);
 306
 307   ME_LogFontFromStyle(hDC, &lf, s, editor->nZoomNumerator, editor->nZoomDenominator);
 308
 309   for (i=0; i<HFONT_CACHE_SIZE; i++)
 310     editor->pFontCache[i].nAge++;
 311   for (i=0, nEmpty=-1, nAge=0; i<HFONT_CACHE_SIZE; i++)
 312   {
 313     item = &editor->pFontCache[i];
 314     if (!item->nRefs)
 315     {
 316       if (item->nAge > nAge)
 317         nEmpty = i, nAge = item->nAge;
 318     }
 319     if (ME_IsFontEqual(&item->lfSpecs, &lf))
 320       break;
 321   }
 322   if (i < HFONT_CACHE_SIZE) /* found */
 323   {
 324     item = &editor->pFontCache[i];
 325     TRACE_(richedit_style)("font reused %d\n", i);
 326
 327     s->hFont = item->hFont;
 328     item->nRefs++;
 329   }
 330   else
 331   {
 332     item = &editor->pFontCache[nEmpty]; /* this legal even when nEmpty == -1, as we don't dereference it */
 333
 334     assert(nEmpty != -1); /* otherwise we leak cache entries or get too many fonts at once*/
 335     if (item->hFont) {
 336       TRACE_(richedit_style)("font deleted %d\n", nEmpty);
 337       DeleteObject(item->hFont);
 338       item->hFont = NULL;
 339     }
 340     s->hFont = CreateFontIndirectW(&lf);
 341     assert(s->hFont);
 342     TRACE_(richedit_style)("font created %d\n", nEmpty);
 343     item->hFont = s->hFont;
 344     item->nRefs = 1;
 345     memcpy(&item->lfSpecs, &lf, sizeof(LOGFONTW));
 346   }
 347   hOldFont = SelectObject(hDC, s->hFont);
 348   /* should be cached too, maybe ? */
 349   GetTextMetricsW(hDC, &s->tm);
 350   return hOldFont;
 351 }
 352
 353 void ME_UnselectStyleFont(ME_TextEditor *editor, HDC hDC, ME_Style *s, HFONT hOldFont)
 354 {
 355   int i;
 356
 357   assert(hDC);
 358   assert(s);
 359   SelectObject(hDC, hOldFont);
 360   for (i=0; i<HFONT_CACHE_SIZE; i++)
 361   {
 362     ME_FontCacheItem *pItem = &editor->pFontCache[i];
 363     if (pItem->hFont == s->hFont && pItem->nRefs > 0)
 364     {
 365       pItem->nRefs--;
 366       pItem->nAge = 0;
 367       s->hFont = NULL;
 368       return;
 369     }
 370   }
 371   assert(0 == "UnselectStyleFont without SelectStyleFont");
 372 }
 373
 374 void ME_DestroyStyle(ME_Style *s) {
 375   if (s->hFont)
 376   {
 377     DeleteObject(s->hFont);
 378     s->hFont = NULL;
 379   }
 380   FREE_OBJ(s);
 381 }
 382
 383 void ME_AddRefStyle(ME_Style *s)
 384 {
 385   assert(s->nRefs>0); /* style with 0 references isn't supposed to exist */
 386   s->nRefs++;
 387   all_refs++;
 388 }
 389
 390 void ME_ReleaseStyle(ME_Style *s)
 391 {
 392   s->nRefs--;
 393   all_refs--;
 394   if (s->nRefs==0)
 395     TRACE_(richedit_style)("destroy style %p, total refs=%d\n", s, all_refs);
 396   else
 397     TRACE_(richedit_style)("release style %p, new refs=%d, total refs=%d\n", s, s->nRefs, all_refs);
 398   if (!all_refs) TRACE("all style references freed (good!)\n");
 399   assert(s->nRefs>=0);
 400   if (!s->nRefs)
 401     ME_DestroyStyle(s);
 402 }
 403
 404 ME_Style *ME_GetInsertStyle(ME_TextEditor *editor, int nCursor) {
 405   if (ME_IsSelection(editor))
 406   {
 407     ME_Cursor c;
 408     int from, to;
 409
 410     ME_GetSelection(editor, &from, &to);
 411     ME_CursorFromCharOfs(editor, from, &c);
 412     ME_AddRefStyle(c.pRun->member.run.style);
 413     return c.pRun->member.run.style;
 414   }
 415   if (editor->pBuffer->pCharStyle) {
 416     ME_AddRefStyle(editor->pBuffer->pCharStyle);
 417     return editor->pBuffer->pCharStyle;
 418   }
 419   else
 420   {
 421     ME_Cursor *pCursor = &editor->pCursors[nCursor];
 422     ME_DisplayItem *pRunItem = pCursor->pRun;
 423     ME_DisplayItem *pPrevItem = NULL;
 424     if (pCursor->nOffset) {
 425       ME_Run *pRun = &pRunItem->member.run;
 426       ME_AddRefStyle(pRun->style);
 427       return pRun->style;
 428     }
 429     pPrevItem = ME_FindItemBack(pRunItem, diRunOrParagraph);
 430     if (pPrevItem->type == diRun)
 431     {
 432       ME_AddRefStyle(pPrevItem->member.run.style);
 433       return pPrevItem->member.run.style;
 434     }
 435     else
 436     {
 437       ME_AddRefStyle(pRunItem->member.run.style);
 438       return pRunItem->member.run.style;
 439     }
 440   }
 441 }
 442
 443 void ME_SaveTempStyle(ME_TextEditor *editor)
 444 {
 445   ME_Style *old_style = editor->pBuffer->pCharStyle;
 446   editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
 447   if (old_style)
 448     ME_ReleaseStyle(old_style);
 449 }
 450
 451 void ME_ClearTempStyle(ME_TextEditor *editor)
 452 {
 453   if (!editor->pBuffer->pCharStyle) return;
 454   ME_ReleaseStyle(editor->pBuffer->pCharStyle);
 455   editor->pBuffer->pCharStyle = NULL;
 456 }