dlls/riched20/run.c

   1 /*
   2  * RichEdit - operations on runs (diRun, rectangular pieces of paragraphs).
   3  * Splitting/joining runs. Adjusting offsets after deleting/adding content.
   4  * Character/pixel conversions.
   5  *
   6  * Copyright 2004 by Krzysztof Foltman
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "editor.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  26
  27 int ME_CanJoinRuns(ME_Run *run1, ME_Run *run2)
  28 {
  29   if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
  30     return 0;
  31   if (run1->style != run2->style)
  32     return 0;
  33   if ((run1->nFlags & MERF_STYLEFLAGS) != (run2->nFlags & MERF_STYLEFLAGS))
  34     return 0;
  35   return 1;
  36 }
  37
  38 void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift)
  39 {
  40   p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
  41   assert(p);
  42   ME_PropagateCharOffset(p, shift);
  43 }
  44
  45 void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
  46 {
  47   if (p->type == diRun) /* propagate in all runs in this para */
  48   {
  49     TRACE("PropagateCharOffset(%s, %d)\n", debugstr_w(p->member.run.strText->szData), shift);
  50     do {
  51       p->member.run.nCharOfs += shift;
  52       assert(p->member.run.nCharOfs >= 0);
  53       p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
  54     } while(p->type == diRun);
  55   }
  56   if (p->type == diParagraph) /* propagate in all next paras */
  57   {
  58     do {
  59       p->member.para.nCharOfs += shift;
  60       assert(p->member.para.nCharOfs >= 0);
  61       p = p->member.para.next_para;
  62     } while(p->type == diParagraph);
  63   }
  64   if (p->type == diTextEnd)
  65   {
  66     p->member.para.nCharOfs += shift;
  67     assert(p->member.para.nCharOfs >= 0);
  68   }
  69 }
  70
  71 void ME_CheckCharOffsets(ME_TextEditor *editor)
  72 {
  73   ME_DisplayItem *p = editor->pBuffer->pFirst;
  74   int ofs = 0, ofsp = 0;
  75   if(TRACE_ON(richedit))
  76   {
  77     TRACE("---\n");
  78     ME_DumpDocument(editor->pBuffer);
  79   }
  80   do {
  81     p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
  82     switch(p->type) {
  83       case diTextEnd:
  84         TRACE("tend, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
  85         assert(ofsp+ofs == p->member.para.nCharOfs);
  86         return;
  87       case diParagraph:
  88         TRACE("para, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
  89         assert(ofsp+ofs == p->member.para.nCharOfs);
  90         ofsp = p->member.para.nCharOfs;
  91         ofs = 0;
  92         break;
  93       case diRun:
  94         TRACE("run, real ofs = %d (+ofsp = %d), counted = %d, len = %d, txt = \"%s\", flags=%08x, fx&mask = %08lx\n",
  95           p->member.run.nCharOfs, p->member.run.nCharOfs+ofsp, ofsp+ofs,
  96           p->member.run.strText->nLen, debugstr_w(p->member.run.strText->szData),
  97           p->member.run.nFlags,
  98           p->member.run.style->fmt.dwMask & p->member.run.style->fmt.dwEffects);
  99         assert(ofs == p->member.run.nCharOfs);
 100         ofs += ME_StrLen(p->member.run.strText);
 101         break;
 102       default:
 103         assert(0);
 104     }
 105   } while(1);
 106 }
 107
 108 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, ME_DisplayItem *pRun, int nOfs)
 109 {
 110   ME_DisplayItem *pPara;
 111
 112   assert(pRun->type == diRun);
 113   assert(pRun->member.run.nCharOfs != -1);
 114
 115   pPara = ME_FindItemBack(pRun, diParagraph);
 116   assert(pPara);
 117   assert(pPara->type==diParagraph);
 118   return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs
 119     + ME_VPosToPos(pRun->member.run.strText, nOfs);
 120 }
 121
 122 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
 123 {
 124   ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pRun, &pCursor->nOffset);
 125 }
 126
 127 void ME_RunOfsFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem **ppRun, int *pOfs)
 128 {
 129   ME_DisplayItem *pPara;
 130   int nParaOfs;
 131
 132   pPara = editor->pBuffer->pFirst->member.para.next_para;
 133   assert(pPara);
 134   assert(ppRun);
 135   assert(pOfs);
 136   while (pPara->type == diParagraph)
 137   {
 138     nParaOfs = pPara->member.para.nCharOfs;
 139     assert(nCharOfs >= nParaOfs);
 140
 141     if (nCharOfs < pPara->member.para.next_para->member.para.nCharOfs)
 142     {
 143       *ppRun = ME_FindItemFwd(pPara, diRun);
 144       assert(*ppRun);
 145       while (!((*ppRun)->member.run.nFlags & MERF_ENDPARA))
 146       {
 147         ME_DisplayItem *pNext = ME_FindItemFwd(*ppRun, diRun);
 148         assert(pNext);
 149         assert(pNext->type == diRun);
 150         if (nCharOfs < nParaOfs + pNext->member.run.nCharOfs) {
 151           *pOfs = ME_PosToVPos((*ppRun)->member.run.strText,
 152             nCharOfs - nParaOfs - (*ppRun)->member.run.nCharOfs);
 153           return;
 154         }
 155         *ppRun = pNext;
 156       }
 157       if (nCharOfs == nParaOfs + (*ppRun)->member.run.nCharOfs) {
 158         *pOfs = 0;
 159         return;
 160       }
 161     }
 162     pPara = pPara->member.para.next_para;
 163   }
 164   *ppRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
 165   *pOfs = 0;
 166   assert((*ppRun)->member.run.nFlags & MERF_ENDPARA);
 167 }
 168
 169 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
 170 {
 171   ME_DisplayItem *pNext = p->next;
 172   int i;
 173   assert(p->type == diRun && pNext->type == diRun);
 174   assert(p->member.run.nCharOfs != -1);
 175   ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
 176
 177   if (editor->bCaretAtEnd && editor->pCursors[0].pRun == pNext)
 178     editor->bCaretAtEnd = FALSE;
 179   for (i=0; i<editor->nCursors; i++) {
 180     if (editor->pCursors[i].pRun == pNext) {
 181       editor->pCursors[i].pRun = p;
 182       editor->pCursors[i].nOffset += ME_StrVLen(p->member.run.strText);
 183     }
 184   }
 185
 186   ME_AppendString(p->member.run.strText, pNext->member.run.strText);
 187   ME_Remove(pNext);
 188   ME_DestroyDisplayItem(pNext);
 189   ME_UpdateRunFlags(editor, &p->member.run);
 190   if(TRACE_ON(richedit))
 191   {
 192     TRACE("Before check after join\n");
 193     ME_CheckCharOffsets(editor);
 194     TRACE("After check after join\n");
 195   }
 196 }
 197
 198 ME_DisplayItem *ME_SplitRun(ME_Context *c, ME_DisplayItem *item, int nVChar)
 199 {
 200   ME_TextEditor *editor = c->editor;
 201   ME_DisplayItem *item2 = NULL;
 202   ME_Run *run, *run2;
 203   ME_Paragraph *para = &ME_GetParagraph(item)->member.para;
 204
 205   assert(item->member.run.nCharOfs != -1);
 206   if(TRACE_ON(richedit))
 207   {
 208     TRACE("Before check before split\n");
 209     ME_CheckCharOffsets(editor);
 210     TRACE("After check before split\n");
 211   }
 212
 213   run = &item->member.run;
 214
 215   TRACE("Before split: %s(%ld, %ld)\n", debugstr_w(run->strText->szData),
 216         run->pt.x, run->pt.y);
 217
 218   item2 = ME_SplitRunSimple(editor, item, nVChar);
 219
 220   run2 = &item2->member.run;
 221
 222   ME_CalcRunExtent(c, para, run);
 223   ME_CalcRunExtent(c, para, run2);
 224
 225   run2->pt.x = run->pt.x+run->nWidth;
 226   run2->pt.y = run->pt.y;
 227
 228   if(TRACE_ON(richedit))
 229   {
 230     TRACE("Before check after split\n");
 231     ME_CheckCharOffsets(editor);
 232     TRACE("After check after split\n");
 233     TRACE("After split: %s(%ld, %ld), %s(%ld, %ld)\n",
 234       debugstr_w(run->strText->szData), run->pt.x, run->pt.y,
 235       debugstr_w(run2->strText->szData), run2->pt.x, run2->pt.y);
 236   }
 237
 238   return item2;
 239 }
 240
 241 /* split a run starting from voffset */
 242 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, int nVChar)
 243 {
 244   ME_Run *run = &item->member.run;
 245   ME_DisplayItem *item2;
 246   ME_Run *run2;
 247   int i;
 248   assert(nVChar > 0 && nVChar < ME_StrVLen(run->strText));
 249   assert(item->type == diRun);
 250   assert(!(item->member.run.nFlags & (MERF_GRAPHICS | MERF_TAB)));
 251   assert(item->member.run.nCharOfs != -1);
 252
 253   item2 = ME_MakeRun(run->style,
 254       ME_VSplitString(run->strText, nVChar), run->nFlags&MERF_SPLITMASK);
 255
 256   item2->member.run.nCharOfs = item->member.run.nCharOfs+
 257     ME_VPosToPos(item->member.run.strText, nVChar);
 258
 259   run2 = &item2->member.run;
 260   ME_InsertBefore(item->next, item2);
 261
 262   ME_UpdateRunFlags(editor, run);
 263   ME_UpdateRunFlags(editor, run2);
 264   for (i=0; i<editor->nCursors; i++) {
 265     if (editor->pCursors[i].pRun == item &&
 266         editor->pCursors[i].nOffset >= nVChar) {
 267       assert(item2->type == diRun);
 268       editor->pCursors[i].pRun = item2;
 269       editor->pCursors[i].nOffset -= nVChar;
 270     }
 271   }
 272   ME_GetParagraph(item)->member.para.nFlags |= MEPF_REWRAP;
 273   return item2;
 274 }
 275
 276 ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
 277 {
 278   ME_DisplayItem *item = ME_MakeDI(diRun);
 279   item->member.run.style = s;
 280   item->member.run.strText = strData;
 281   item->member.run.nFlags = nFlags;
 282   item->member.run.nCharOfs = -1;
 283   ME_AddRefStyle(s);
 284   return item;
 285 }
 286
 287 ME_DisplayItem *ME_InsertRun(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem *pItem)
 288 {
 289   ME_Cursor tmp;
 290   ME_DisplayItem *pDI;
 291   ME_UndoItem *pUI;
 292
 293   assert(pItem->type == diRun || pItem->type == diUndoInsertRun);
 294
 295   pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
 296   if (pUI) {
 297     pUI->nStart = nCharOfs;
 298     pUI->nLen = pItem->member.run.strText->nLen;
 299   }
 300   ME_CursorFromCharOfs(editor, nCharOfs, &tmp);
 301   if (tmp.nOffset) {
 302     tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
 303     tmp.nOffset = 0;
 304   }
 305   pDI = ME_MakeRun(pItem->member.run.style, ME_StrDup(pItem->member.run.strText), pItem->member.run.nFlags);
 306   pDI->member.run.nCharOfs = tmp.pRun->member.run.nCharOfs;
 307   ME_InsertBefore(tmp.pRun, pDI);
 308   TRACE("Shift length:%d\n", pDI->member.run.strText->nLen);
 309   ME_PropagateCharOffset(tmp.pRun, pDI->member.run.strText->nLen);
 310   ME_GetParagraph(tmp.pRun)->member.para.nFlags |= MEPF_REWRAP;
 311
 312   return pDI;
 313 }
 314
 315 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
 316 {
 317   assert(run->nCharOfs != -1);
 318   if (ME_IsSplitable(run->strText))
 319     run->nFlags |= MERF_SPLITTABLE;
 320   else
 321     run->nFlags &= ~MERF_SPLITTABLE;
 322
 323   if (!(run->nFlags & MERF_NOTEXT)) {
 324     if (ME_IsWhitespaces(run->strText))
 325       run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
 326     else
 327     {
 328       run->nFlags &= ~MERF_WHITESPACE;
 329
 330       if (ME_IsWSpace(ME_GetCharFwd(run->strText,0)))
 331         run->nFlags |= MERF_STARTWHITE;
 332       else
 333         run->nFlags &= ~MERF_STARTWHITE;
 334
 335       if (ME_IsWSpace(ME_GetCharBack(run->strText,0)))
 336         run->nFlags |= MERF_ENDWHITE;
 337       else
 338         run->nFlags &= ~MERF_ENDWHITE;
 339     }
 340   }
 341   else
 342     run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
 343 }
 344
 345 void ME_GetGraphicsSize(ME_TextEditor *editor, ME_Run *run, SIZE *pSize)
 346 {
 347   assert(run->nFlags & MERF_GRAPHICS);
 348   pSize->cx = 64;
 349   pSize->cy = 64;
 350 }
 351
 352 int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Paragraph *para, ME_Run *run)
 353 {
 354   int fit = 0;
 355   HGDIOBJ hOldFont;
 356   HDC hDC;
 357   SIZE sz;
 358   if (!run->strText->nLen)
 359     return 0;
 360
 361   if (run->nFlags & MERF_TAB)
 362   {
 363     if (cx < run->nWidth/2)
 364       return 0;
 365     return 1;
 366   }
 367   if (run->nFlags & MERF_GRAPHICS)
 368   {
 369     SIZE sz;
 370     ME_GetGraphicsSize(editor, run, &sz);
 371     if (cx < sz.cx)
 372       return 0;
 373     return 1;
 374   }
 375   hDC = GetDC(editor->hWnd);
 376   hOldFont = ME_SelectStyleFont(editor, hDC, run->style);
 377   GetTextExtentExPointW(hDC, run->strText->szData, run->strText->nLen,
 378     cx, &fit, NULL, &sz);
 379   ME_UnselectStyleFont(editor, hDC, run->style, hOldFont);
 380   ReleaseDC(editor->hWnd, hDC);
 381   return fit;
 382 }
 383
 384 int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
 385 {
 386   int fit = 0, fit1 = 0;
 387   HGDIOBJ hOldFont;
 388   HDC hDC;
 389   SIZE sz, sz2, sz3;
 390   if (!run->strText->nLen)
 391     return 0;
 392
 393   if (run->nFlags & MERF_TAB)
 394   {
 395     if (cx < run->nWidth/2)
 396       return 0;
 397     return 1;
 398   }
 399   if (run->nFlags & MERF_GRAPHICS)
 400   {
 401     SIZE sz;
 402     ME_GetGraphicsSize(editor, run, &sz);
 403     if (cx < sz.cx/2)
 404       return 0;
 405     return 1;
 406   }
 407
 408   hDC = GetDC(editor->hWnd);
 409   hOldFont = ME_SelectStyleFont(editor, hDC, run->style);
 410   GetTextExtentExPointW(hDC, run->strText->szData, run->strText->nLen,
 411     cx, &fit, NULL, &sz);
 412   if (fit != run->strText->nLen)
 413   {
 414     int chars = 1;
 415
 416     GetTextExtentPoint32W(hDC, run->strText->szData, fit, &sz2);
 417     fit1 = ME_StrRelPos(run->strText, fit, &chars);
 418     GetTextExtentPoint32W(hDC, run->strText->szData, fit1, &sz3);
 419     if (cx >= (sz2.cx+sz3.cx)/2)
 420       fit = fit1;
 421   }
 422   ME_UnselectStyleFont(editor, hDC, run->style, hOldFont);
 423   ReleaseDC(editor->hWnd, hDC);
 424   return fit;
 425 }
 426
 427 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
 428 {
 429   SIZE size;
 430   HDC hDC = GetDC(editor->hWnd);
 431   HGDIOBJ hOldFont;
 432
 433   if (pRun->nFlags & MERF_GRAPHICS)
 434   {
 435     if (!nOffset) return 0;
 436     ME_GetGraphicsSize(editor, pRun, &size);
 437     return 1;
 438   }
 439   hOldFont = ME_SelectStyleFont(editor, hDC, pRun->style);
 440   GetTextExtentPoint32W(hDC, pRun->strText->szData, nOffset, &size);
 441   ME_UnselectStyleFont(editor, hDC, pRun->style, hOldFont);
 442   ReleaseDC(editor->hWnd, hDC);
 443   return size.cx;
 444 }
 445
 446 void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s,
 447   SIZE *size)
 448 {
 449   HDC hDC = c->hDC;
 450   HGDIOBJ hOldFont;
 451   hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
 452   GetTextExtentPoint32W(hDC, szText, nChars, size);
 453   ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
 454 }
 455
 456 SIZE ME_GetRunSizeCommon(ME_Context *c, ME_Paragraph *para, ME_Run *run, int nLen, int *pAscent, int *pDescent)
 457 {
 458   SIZE size;
 459   int nMaxLen = ME_StrVLen(run->strText);
 460
 461   if (nLen>nMaxLen)
 462     nLen = nMaxLen;
 463
 464   /* FIXME the following call also ensures that TEXTMETRIC structure is filled
 465    * this is wasteful for graphics and TAB runs, but that shouldn't matter
 466    * in practice
 467    */
 468   ME_GetTextExtent(c, run->strText->szData, nLen, run->style, &size);
 469   assert(run->style->tm.tmAscent>0);
 470   assert(run->style->tm.tmDescent>0);
 471   *pAscent = run->style->tm.tmAscent;
 472   *pDescent = run->style->tm.tmDescent;
 473   size.cy = *pAscent + *pDescent;
 474
 475   if (run->nFlags & MERF_TAB)
 476   {
 477     int pos = 0, i = 0, ppos;
 478     int lpsx = GetDeviceCaps(c->hDC, LOGPIXELSX);
 479     PARAFORMAT2 *pFmt = para->pFmt;
 480     do {
 481       if (i < pFmt->cTabCount)
 482       {
 483         pos = pFmt->rgxTabs[i]&0x00FFFFFF;
 484         i++;
 485       }
 486       else
 487       {
 488         pos += 720-(pos%720);
 489       }
 490       ppos = pos*lpsx/1440;
 491       if (ppos>run->pt.x) {
 492         size.cx = ppos - run->pt.x;
 493         break;
 494       }
 495     } while(1);
 496     size.cy = *pAscent + *pDescent;
 497     return size;
 498   }
 499   if (run->nFlags & MERF_GRAPHICS)
 500   {
 501     ME_GetGraphicsSize(c->editor, run, &size);
 502     if (size.cy > *pAscent)
 503       *pAscent = size.cy;
 504     /* descent is unchanged */
 505     return size;
 506   }
 507
 508   return size;
 509 }
 510
 511 SIZE ME_GetRunSize(ME_Context *c, ME_Paragraph *para, ME_Run *run, int nLen)
 512 {
 513   int asc, desc;
 514   return ME_GetRunSizeCommon(c, para, run, nLen, &asc, &desc);
 515 }
 516
 517 void ME_CalcRunExtent(ME_Context *c, ME_Paragraph *para, ME_Run *run)
 518 {
 519   int nEnd = ME_StrVLen(run->strText);
 520   SIZE size = ME_GetRunSizeCommon(c, para, run, nEnd, &run->nAscent, &run->nDescent);
 521   run->nWidth = size.cx;
 522   assert(size.cx);
 523 }
 524
 525 void ME_MustBeWrapped(ME_Context *c, ME_DisplayItem *para)
 526 {
 527   assert(para->type == diParagraph);
 528   /* FIXME */
 529 }
 530
 531 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
 532 {
 533   int nFrom, nTo;
 534   ME_GetSelection(editor, &nFrom, &nTo);
 535   if (nFrom == nTo)
 536   {
 537     ME_Style *s;
 538     if (!editor->pBuffer->pCharStyle)
 539       editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
 540     s = ME_ApplyStyle(editor->pBuffer->pCharStyle, pFmt);
 541     ME_ReleaseStyle(editor->pBuffer->pCharStyle);
 542     editor->pBuffer->pCharStyle = s;
 543   }
 544   else
 545     ME_SetCharFormat(editor, nFrom, nTo-nFrom, pFmt);
 546 }
 547
 548 void ME_SetCharFormat(ME_TextEditor *editor, int nOfs, int nChars, CHARFORMAT2W *pFmt)
 549 {
 550   ME_Cursor tmp, tmp2;
 551   ME_DisplayItem *para;
 552
 553   ME_CursorFromCharOfs(editor, nOfs, &tmp);
 554   if (tmp.nOffset)
 555     tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
 556
 557   ME_CursorFromCharOfs(editor, nOfs+nChars, &tmp2);
 558   if (tmp2.nOffset)
 559     tmp2.pRun = ME_SplitRunSimple(editor, tmp2.pRun, tmp2.nOffset);
 560
 561   para = ME_GetParagraph(tmp.pRun);
 562   para->member.para.nFlags |= MEPF_REWRAP;
 563
 564   while(tmp.pRun != tmp2.pRun)
 565   {
 566     ME_UndoItem *undo = NULL;
 567     ME_Style *new_style = ME_ApplyStyle(tmp.pRun->member.run.style, pFmt);
 568     /* ME_DumpStyle(new_style); */
 569     undo = ME_AddUndoItem(editor, diUndoSetCharFormat, NULL);
 570     if (undo) {
 571       undo->nStart = tmp.pRun->member.run.nCharOfs+para->member.para.nCharOfs;
 572       undo->nLen = tmp.pRun->member.run.strText->nLen;
 573       undo->di.member.ustyle = tmp.pRun->member.run.style;
 574       /* we'd have to addref undo..ustyle and release tmp...style
 575          but they'd cancel each other out so we can do nothing instead */
 576     }
 577     else
 578       ME_ReleaseStyle(tmp.pRun->member.run.style);
 579     tmp.pRun->member.run.style = new_style;
 580     tmp.pRun = ME_FindItemFwd(tmp.pRun, diRunOrParagraph);
 581     if (tmp.pRun->type == diParagraph)
 582     {
 583       para = tmp.pRun;
 584       tmp.pRun = ME_FindItemFwd(tmp.pRun, diRun);
 585       if (tmp.pRun != tmp2.pRun)
 586         para->member.para.nFlags |= MEPF_REWRAP;
 587     }
 588     assert(tmp.pRun);
 589   }
 590 }
 591
 592 void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
 593 {
 594   ME_Style *style;
 595   ME_UndoItem *undo;
 596
 597   assert(mod->cbSize == sizeof(CHARFORMAT2W));
 598   undo = ME_AddUndoItem(editor, diUndoSetDefaultCharFormat, NULL);
 599   if (undo) {
 600     undo->nStart = -1;
 601     undo->nLen = -1;
 602     undo->di.member.ustyle = editor->pBuffer->pDefaultStyle;
 603     ME_AddRefStyle(undo->di.member.ustyle);
 604   }
 605   style = ME_ApplyStyle(editor->pBuffer->pDefaultStyle, mod);
 606   editor->pBuffer->pDefaultStyle->fmt = style->fmt;
 607   editor->pBuffer->pDefaultStyle->tm = style->tm;
 608   ME_ReleaseStyle(style);
 609   ME_MarkAllForWrapping(editor);
 610   /*  pcf = editor->pBuffer->pDefaultStyle->fmt; */
 611 }
 612
 613 void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
 614 {
 615   ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
 616 }
 617
 618 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
 619 {
 620   int nFrom, nTo;
 621   ME_GetSelection(editor, &nFrom, &nTo);
 622   ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
 623 }
 624
 625 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
 626 {
 627   int nFrom, nTo;
 628   ME_GetSelection(editor, &nFrom, &nTo);
 629   if (nFrom == nTo && editor->pBuffer->pCharStyle)
 630   {
 631     ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
 632     return;
 633   }
 634   ME_GetCharFormat(editor, nFrom, nTo, pFmt);
 635 }
 636
 637 void ME_GetCharFormat(ME_TextEditor *editor, int nFrom, int nTo, CHARFORMAT2W *pFmt)
 638 {
 639   ME_DisplayItem *run, *run_end;
 640   int nOffset, nOffset2;
 641   CHARFORMAT2W tmp;
 642
 643   if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
 644     nTo--;
 645
 646   ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
 647   if (nFrom == nTo) /* special case - if selection is empty, take previous char's formatting */
 648   {
 649     if (!nOffset)
 650     {
 651       ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
 652       if (tmp_run->type == diRun) {
 653         ME_GetRunCharFormat(editor, tmp_run, pFmt);
 654         return;
 655       }
 656     }
 657     ME_GetRunCharFormat(editor, run, pFmt);
 658     return;
 659   }
 660   ME_RunOfsFromCharOfs(editor, nTo, &run_end, &nOffset2);
 661
 662   ME_GetRunCharFormat(editor, run, pFmt);
 663
 664   if (run == run_end) return;
 665
 666   do {
 667     /* FIXME add more style feature comparisons */
 668     int nAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR;
 669     int nEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE;
 670
 671     run = ME_FindItemFwd(run, diRun);
 672
 673     ZeroMemory(&tmp, sizeof(tmp));
 674     tmp.cbSize = sizeof(tmp);
 675     ME_GetRunCharFormat(editor, run, &tmp);
 676
 677     assert((tmp.dwMask & nAttribs) == nAttribs);
 678     assert((tmp.dwMask & nEffects) == nEffects);
 679     /* reset flags that differ */
 680
 681     if (pFmt->yHeight != tmp.yHeight)
 682       pFmt->dwMask &= ~CFM_SIZE;
 683     if (pFmt->dwMask & CFM_FACE)
 684     {
 685       if (!(tmp.dwMask & CFM_FACE))
 686         pFmt->dwMask &= ~CFM_FACE;
 687       else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName))
 688         pFmt->dwMask &= ~CFM_FACE;
 689     }
 690     if (pFmt->yHeight != tmp.yHeight)
 691       pFmt->dwMask &= ~CFM_SIZE;
 692     if (pFmt->dwMask & CFM_COLOR)
 693     {
 694       if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
 695       {
 696         if (pFmt->crTextColor != tmp.crTextColor)
 697           pFmt->dwMask &= ~CFM_COLOR;
 698       }
 699     }
 700
 701     pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & nEffects);
 702
 703   } while(run != run_end);
 704 }