dlls/riched20/wrap.c

   1 /*
   2  * RichEdit - Paragraph wrapping. Don't try to understand it. You've been
   3  * warned !
   4  *
   5  * Copyright 2004 by Krzysztof Foltman
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22
  23 #include "editor.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  26
  27 /*
  28  * Unsolved problems:
  29  *
  30  * - center and right align in WordPad omits all spaces at the start, we don't
  31  * - objects/images are not handled yet
  32  * - no tabs
  33  */
  34
  35 static ME_DisplayItem *ME_MakeRow(int height, int baseline, int width)
  36 {
  37   ME_DisplayItem *item = ME_MakeDI(diStartRow);
  38
  39   item->member.row.nHeight = height;
  40   item->member.row.nBaseline = baseline;
  41   item->member.row.nWidth = width;
  42   return item;
  43 }
  44
  45 static void ME_BeginRow(ME_WrapContext *wc)
  46 {
  47   PARAFORMAT2 *pFmt;
  48   ME_DisplayItem *para = wc->pPara;
  49
  50   pFmt = para->member.para.pFmt;
  51   wc->pRowStart = NULL;
  52   wc->bOverflown = FALSE;
  53   wc->pLastSplittableRun = NULL;
  54   wc->bWordWrap = wc->context->editor->bWordWrap;
  55   if (para->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND)) {
  56     wc->nAvailWidth = 0;
  57     wc->bWordWrap = FALSE;
  58     if (para->member.para.nFlags & MEPF_ROWEND)
  59     {
  60       ME_Cell *cell = &ME_FindItemBack(para, diCell)->member.cell;
  61       cell->nWidth = 0;
  62     }
  63   } else if (para->member.para.pCell) {
  64     ME_Cell *cell = &para->member.para.pCell->member.cell;
  65     int width;
  66
  67     width = cell->nRightBoundary;
  68     if (cell->prev_cell)
  69       width -= cell->prev_cell->member.cell.nRightBoundary;
  70     if (!cell->prev_cell)
  71     {
  72       int rowIndent = ME_GetTableRowEnd(para)->member.para.pFmt->dxStartIndent;
  73       width -= rowIndent;
  74     }
  75     cell->nWidth = max(ME_twips2pointsX(wc->context, width), 0);
  76
  77     wc->nAvailWidth = cell->nWidth
  78         - (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
  79     wc->bWordWrap = TRUE;
  80   } else {
  81     wc->nAvailWidth = wc->context->nAvailWidth
  82         - (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
  83   }
  84   wc->pt.x = wc->context->pt.x;
  85   if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
  86       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
  87     /* Shift the text down because of the border. */
  88     wc->pt.y++;
  89 }
  90
  91 static void ME_InsertRowStart(ME_WrapContext *wc, const ME_DisplayItem *pEnd)
  92 {
  93   ME_DisplayItem *p, *row, *para;
  94   BOOL bSkippingSpaces = TRUE;
  95   int ascent = 0, descent = 0, width=0, shift = 0, align = 0;
  96   PARAFORMAT2 *pFmt;
  97   /* wrap text */
  98   para = wc->pPara;
  99   pFmt = para->member.para.pFmt;
 100
 101   for (p = pEnd->prev; p!=wc->pRowStart->prev; p = p->prev)
 102   {
 103       /* ENDPARA run shouldn't affect row height, except if it's the only run in the paragraph */
 104       if (p->type==diRun && ((p==wc->pRowStart) || !(p->member.run.nFlags & MERF_ENDPARA))) { /* FIXME add more run types */
 105         if (p->member.run.nAscent>ascent)
 106           ascent = p->member.run.nAscent;
 107         if (p->member.run.nDescent>descent)
 108           descent = p->member.run.nDescent;
 109         if (bSkippingSpaces)
 110         {
 111           /* Exclude space characters from run width.
 112            * Other whitespace or delimiters are not treated this way. */
 113           SIZE sz;
 114           int len = p->member.run.strText->nLen;
 115           WCHAR *text = p->member.run.strText->szData + len - 1;
 116
 117           assert (len);
 118           if (~p->member.run.nFlags & MERF_GRAPHICS)
 119             while (len && *(text--) == ' ')
 120               len--;
 121           if (len)
 122           {
 123               if (len == p->member.run.strText->nLen)
 124               {
 125                   width += p->member.run.nWidth;
 126               } else {
 127                   sz = ME_GetRunSize(wc->context, &para->member.para,
 128                                      &p->member.run, len, p->member.run.pt.x);
 129                   width += sz.cx;
 130               }
 131           }
 132           bSkippingSpaces = !len;
 133         } else if (!(p->member.run.nFlags & MERF_ENDPARA))
 134           width += p->member.run.nWidth;
 135       }
 136   }
 137
 138   para->member.para.nWidth = max(para->member.para.nWidth, width);
 139   row = ME_MakeRow(ascent+descent, ascent, width);
 140   if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
 141       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
 142   {
 143     /* The text was shifted down in ME_BeginRow so move the wrap context
 144      * back to where it should be. */
 145     wc->pt.y--;
 146     /* The height of the row is increased by the borders. */
 147     row->member.row.nHeight += 2;
 148   }
 149   row->member.row.pt = wc->pt;
 150   row->member.row.nLMargin = (!wc->nRow ? wc->nFirstMargin : wc->nLeftMargin);
 151   row->member.row.nRMargin = wc->nRightMargin;
 152   assert(para->member.para.pFmt->dwMask & PFM_ALIGNMENT);
 153   align = para->member.para.pFmt->wAlignment;
 154   if (align == PFA_CENTER)
 155     shift = max((wc->nAvailWidth-width)/2, 0);
 156   if (align == PFA_RIGHT)
 157     shift = max(wc->nAvailWidth-width, 0);
 158   for (p = wc->pRowStart; p!=pEnd; p = p->next)
 159   {
 160     if (p->type==diRun) { /* FIXME add more run types */
 161       p->member.run.pt.x += row->member.row.nLMargin+shift;
 162     }
 163   }
 164   ME_InsertBefore(wc->pRowStart, row);
 165   wc->nRow++;
 166   wc->pt.y += row->member.row.nHeight;
 167   ME_BeginRow(wc);
 168 }
 169
 170 static void ME_WrapEndParagraph(ME_WrapContext *wc, ME_DisplayItem *p)
 171 {
 172   ME_DisplayItem *para = wc->pPara;
 173   PARAFORMAT2 *pFmt = para->member.para.pFmt;
 174   if (wc->pRowStart)
 175     ME_InsertRowStart(wc, p);
 176   if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
 177       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
 178   {
 179     /* ME_BeginRow was called an extra time for the paragraph, and it shifts the
 180      * text down by one pixel for the border, so fix up the wrap context. */
 181     wc->pt.y--;
 182   }
 183
 184   /*
 185   p = para->next;
 186   while(p) {
 187     if (p->type == diParagraph || p->type == diTextEnd)
 188       return;
 189     if (p->type == diRun)
 190     {
 191       ME_Run *run = &p->member.run;
 192       TRACE("%s - (%d, %d)\n", debugstr_w(run->strText->szData), run->pt.x, run->pt.y);
 193     }
 194     p = p->next;
 195   }
 196   */
 197 }
 198
 199 static void ME_WrapSizeRun(ME_WrapContext *wc, ME_DisplayItem *p)
 200 {
 201   /* FIXME compose style (out of character and paragraph styles) here */
 202
 203   ME_UpdateRunFlags(wc->context->editor, &p->member.run);
 204
 205   ME_CalcRunExtent(wc->context, &wc->pPara->member.para,
 206                    wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, &p->member.run);
 207 }
 208
 209 static ME_DisplayItem *ME_MaximizeSplit(ME_WrapContext *wc, ME_DisplayItem *p, int i)
 210 {
 211   ME_DisplayItem *pp, *piter = p;
 212   int j;
 213   if (!i)
 214     return NULL;
 215   j = ME_ReverseFindNonWhitespaceV(p->member.run.strText, i);
 216   if (j>0) {
 217     pp = ME_SplitRun(wc, piter, j);
 218     wc->pt.x += piter->member.run.nWidth;
 219     return pp;
 220   }
 221   else
 222   {
 223     pp = piter;
 224     /* omit all spaces before split point */
 225     while(piter != wc->pRowStart)
 226     {
 227       piter = ME_FindItemBack(piter, diRun);
 228       if (piter->member.run.nFlags & MERF_WHITESPACE)
 229       {
 230         pp = piter;
 231         continue;
 232       }
 233       if (piter->member.run.nFlags & MERF_ENDWHITE)
 234       {
 235         i = ME_ReverseFindNonWhitespaceV(piter->member.run.strText,
 236                                          piter->member.run.strText->nLen);
 237         pp = ME_SplitRun(wc, piter, i);
 238         wc->pt = pp->member.run.pt;
 239         return pp;
 240       }
 241       /* this run is the end of spaces, so the run edge is a good point to split */
 242       wc->pt = pp->member.run.pt;
 243       wc->bOverflown = TRUE;
 244       TRACE("Split point is: %s|%s\n", debugstr_w(piter->member.run.strText->szData), debugstr_w(pp->member.run.strText->szData));
 245       return pp;
 246     }
 247     wc->pt = piter->member.run.pt;
 248     return piter;
 249   }
 250 }
 251
 252 static ME_DisplayItem *ME_SplitByBacktracking(ME_WrapContext *wc, ME_DisplayItem *p, int loc)
 253 {
 254   ME_DisplayItem *piter = p, *pp;
 255   int i, idesp, len;
 256   ME_Run *run = &p->member.run;
 257
 258   idesp = i = ME_CharFromPoint(wc->context, loc, run);
 259   len = run->strText->nLen;
 260   assert(len>0);
 261   assert(i<len);
 262   if (i) {
 263     /* don't split words */
 264     i = ME_ReverseFindWhitespaceV(run->strText, i);
 265     pp = ME_MaximizeSplit(wc, p, i);
 266     if (pp)
 267       return pp;
 268   }
 269   TRACE("Must backtrack to split at: %s\n", debugstr_w(p->member.run.strText->szData));
 270   if (wc->pLastSplittableRun)
 271   {
 272     if (wc->pLastSplittableRun->member.run.nFlags & (MERF_GRAPHICS|MERF_TAB))
 273     {
 274       wc->pt = wc->pLastSplittableRun->member.run.pt;
 275       return wc->pLastSplittableRun;
 276     }
 277     else if (wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE)
 278     {
 279       /* the following two lines are just to check if we forgot to call UpdateRunFlags earlier,
 280          they serve no other purpose */
 281       ME_UpdateRunFlags(wc->context->editor, run);
 282       assert((wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE));
 283
 284       piter = wc->pLastSplittableRun;
 285       run = &piter->member.run;
 286       len = run->strText->nLen;
 287       /* don't split words */
 288       i = ME_ReverseFindWhitespaceV(run->strText, len);
 289       if (i == len)
 290         i = ME_ReverseFindNonWhitespaceV(run->strText, len);
 291       if (i) {
 292         ME_DisplayItem *piter2 = ME_SplitRun(wc, piter, i);
 293         wc->pt = piter2->member.run.pt;
 294         return piter2;
 295       }
 296       /* splittable = must have whitespaces */
 297       assert(0 == "Splittable, but no whitespaces");
 298     }
 299     else
 300     {
 301       /* restart from the first run beginning with spaces */
 302       wc->pt = wc->pLastSplittableRun->member.run.pt;
 303       return wc->pLastSplittableRun;
 304     }
 305   }
 306   TRACE("Backtracking failed, trying desperate: %s\n", debugstr_w(p->member.run.strText->szData));
 307   /* OK, no better idea, so assume we MAY split words if we can split at all*/
 308   if (idesp)
 309     return ME_SplitRun(wc, piter, idesp);
 310   else
 311   if (wc->pRowStart && piter != wc->pRowStart)
 312   {
 313     /* don't need to break current run, because it's possible to split
 314        before this run */
 315     wc->bOverflown = TRUE;
 316     return piter;
 317   }
 318   else
 319   {
 320     /* split point inside first character - no choice but split after that char */
 321     if (len != 1) {
 322       /* the run is more than 1 char, so we may split */
 323       return ME_SplitRun(wc, piter, 1);
 324     }
 325     /* the run is one char, can't split it */
 326     return piter;
 327   }
 328 }
 329
 330 static ME_DisplayItem *ME_WrapHandleRun(ME_WrapContext *wc, ME_DisplayItem *p)
 331 {
 332   ME_DisplayItem *pp;
 333   ME_Run *run;
 334   int len;
 335
 336   assert(p->type == diRun);
 337   if (!wc->pRowStart)
 338     wc->pRowStart = p;
 339   run = &p->member.run;
 340   run->pt.x = wc->pt.x;
 341   run->pt.y = wc->pt.y;
 342   ME_WrapSizeRun(wc, p);
 343   len = run->strText->nLen;
 344
 345   if (wc->bOverflown) /* just skipping final whitespaces */
 346   {
 347     /* End paragraph run can't overflow to the next line by itself. */
 348     if (run->nFlags & MERF_ENDPARA)
 349       return p->next;
 350
 351     if (run->nFlags & MERF_WHITESPACE) {
 352       wc->pt.x += run->nWidth;
 353       /* skip runs consisting of only whitespaces */
 354       return p->next;
 355     }
 356
 357     if (run->nFlags & MERF_STARTWHITE) {
 358       /* try to split the run at the first non-white char */
 359       int black;
 360       black = ME_FindNonWhitespaceV(run->strText, 0);
 361       if (black) {
 362         wc->bOverflown = FALSE;
 363         pp = ME_SplitRun(wc, p, black);
 364         ME_InsertRowStart(wc, pp);
 365         return pp;
 366       }
 367     }
 368     /* black run: the row goes from pRowStart to the previous run */
 369     ME_InsertRowStart(wc, p);
 370     return p;
 371   }
 372   /* simply end the current row and move on to next one */
 373   if (run->nFlags & MERF_ENDROW)
 374   {
 375     p = p->next;
 376     ME_InsertRowStart(wc, p);
 377     return p;
 378   }
 379
 380   /* will current run fit? */
 381   if (wc->bWordWrap &&
 382       wc->pt.x + run->nWidth - wc->context->pt.x > wc->nAvailWidth)
 383   {
 384     int loc = wc->context->pt.x + wc->nAvailWidth - wc->pt.x;
 385     /* total white run ? */
 386     if (run->nFlags & MERF_WHITESPACE) {
 387       /* let the overflow logic handle it */
 388       wc->bOverflown = TRUE;
 389       return p;
 390     }
 391     /* TAB: we can split before */
 392     if (run->nFlags & MERF_TAB) {
 393       wc->bOverflown = TRUE;
 394       if (wc->pRowStart == p)
 395         /* Don't split before the start of the run, or we will get an
 396          * endless loop. */
 397         return p->next;
 398       else
 399         return p;
 400     }
 401     /* graphics: we can split before, if run's width is smaller than row's width */
 402     if ((run->nFlags & MERF_GRAPHICS) && run->nWidth <= wc->nAvailWidth) {
 403       wc->bOverflown = TRUE;
 404       return p;
 405     }
 406     /* can we separate out the last spaces ? (to use overflow logic later) */
 407     if (run->nFlags & MERF_ENDWHITE)
 408     {
 409       /* we aren't sure if it's *really* necessary, it's a good start however */
 410       int black = ME_ReverseFindNonWhitespaceV(run->strText, len);
 411       ME_SplitRun(wc, p, black);
 412       /* handle both parts again */
 413       return p;
 414     }
 415     /* determine the split point by backtracking */
 416     pp = ME_SplitByBacktracking(wc, p, loc);
 417     if (pp == wc->pRowStart)
 418     {
 419       if (run->nFlags & MERF_STARTWHITE)
 420       {
 421           /* We had only spaces so far, so we must be on the first line of the
 422            * paragraph (or the first line after MERF_ENDROW forced the line
 423            * break within the paragraph), since no other lines of the paragraph
 424            * start with spaces. */
 425
 426           /* The lines will only contain spaces, and the rest of the run will
 427            * overflow onto the next line. */
 428           wc->bOverflown = TRUE;
 429           return p;
 430       }
 431       /* Couldn't split the first run, possible because we have a large font
 432        * with a single character that caused an overflow.
 433        */
 434       wc->pt.x += run->nWidth;
 435       return p->next;
 436     }
 437     if (p != pp) /* found a suitable split point */
 438     {
 439       wc->bOverflown = TRUE;
 440       return pp;
 441     }
 442     /* we detected that it's best to split on start of this run */
 443     if (wc->bOverflown)
 444       return pp;
 445     ERR("failure!\n");
 446     /* not found anything - writing over margins is the only option left */
 447   }
 448   if ((run->nFlags & (MERF_SPLITTABLE | MERF_STARTWHITE))
 449     || ((run->nFlags & (MERF_GRAPHICS|MERF_TAB)) && (p != wc->pRowStart)))
 450   {
 451     wc->pLastSplittableRun = p;
 452   }
 453   wc->pt.x += run->nWidth;
 454   return p->next;
 455 }
 456
 457 static int ME_GetParaLineSpace(ME_Context* c, ME_Paragraph* para)
 458 {
 459   int   sp = 0, ls = 0;
 460   if (!(para->pFmt->dwMask & PFM_LINESPACING)) return 0;
 461
 462   /* FIXME: how to compute simply the line space in ls ??? */
 463   /* FIXME: does line spacing include the line itself ??? */
 464   switch (para->pFmt->bLineSpacingRule)
 465   {
 466   case 0:       sp = ls; break;
 467   case 1:       sp = (3 * ls) / 2; break;
 468   case 2:       sp = 2 * ls; break;
 469   case 3:       sp = ME_twips2pointsY(c, para->pFmt->dyLineSpacing); if (sp < ls) sp = ls; break;
 470   case 4:       sp = ME_twips2pointsY(c, para->pFmt->dyLineSpacing); break;
 471   case 5:       sp = para->pFmt->dyLineSpacing / 20; break;
 472   default: FIXME("Unsupported spacing rule value %d\n", para->pFmt->bLineSpacingRule);
 473   }
 474   if (c->editor->nZoomNumerator == 0)
 475     return sp;
 476   else
 477     return sp * c->editor->nZoomNumerator / c->editor->nZoomDenominator;
 478 }
 479
 480 static void ME_PrepareParagraphForWrapping(ME_Context *c, ME_DisplayItem *tp);
 481
 482 static void ME_WrapTextParagraph(ME_Context *c, ME_DisplayItem *tp) {
 483   ME_DisplayItem *p;
 484   ME_WrapContext wc;
 485   int border = 0;
 486   int linespace = 0;
 487   PARAFORMAT2 *pFmt;
 488
 489   assert(tp->type == diParagraph);
 490   if (!(tp->member.para.nFlags & MEPF_REWRAP)) {
 491     return;
 492   }
 493   ME_PrepareParagraphForWrapping(c, tp);
 494   pFmt = tp->member.para.pFmt;
 495
 496   wc.context = c;
 497   wc.pPara = tp;
 498 /*   wc.para_style = tp->member.para.style; */
 499   wc.style = NULL;
 500   if (tp->member.para.nFlags & MEPF_ROWEND) {
 501     wc.nFirstMargin = wc.nLeftMargin = wc.nRightMargin = 0;
 502   } else {
 503     int dxStartIndent = pFmt->dxStartIndent;
 504     if (tp->member.para.pCell) {
 505       dxStartIndent += ME_GetTableRowEnd(tp)->member.para.pFmt->dxOffset;
 506     }
 507     wc.nFirstMargin = ME_twips2pointsX(c, dxStartIndent);
 508     wc.nLeftMargin = wc.nFirstMargin + ME_twips2pointsX(c, pFmt->dxOffset);
 509     wc.nRightMargin = ME_twips2pointsX(c, pFmt->dxRightIndent);
 510   }
 511   if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
 512       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
 513   {
 514     wc.nFirstMargin += ME_twips2pointsX(c, pFmt->dxOffset * 2);
 515   }
 516   wc.nRow = 0;
 517   wc.pt.y = 0;
 518   if (pFmt->dwMask & PFM_SPACEBEFORE)
 519     wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceBefore);
 520   if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
 521       pFmt->dwMask & PFM_BORDER)
 522   {
 523     border = ME_GetParaBorderWidth(c, tp->member.para.pFmt->wBorders);
 524     if (pFmt->wBorders & 1) {
 525       wc.nFirstMargin += border;
 526       wc.nLeftMargin += border;
 527     }
 528     if (pFmt->wBorders & 2)
 529       wc.nRightMargin -= border;
 530     if (pFmt->wBorders & 4)
 531       wc.pt.y += border;
 532   }
 533
 534   linespace = ME_GetParaLineSpace(c, &tp->member.para);
 535
 536   ME_BeginRow(&wc);
 537   for (p = tp->next; p!=tp->member.para.next_para; ) {
 538     assert(p->type != diStartRow);
 539     if (p->type == diRun) {
 540       p = ME_WrapHandleRun(&wc, p);
 541     }
 542     else p = p->next;
 543     if (wc.nRow && p == wc.pRowStart)
 544       wc.pt.y += linespace;
 545   }
 546   ME_WrapEndParagraph(&wc, p);
 547   if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
 548       (pFmt->dwMask & PFM_BORDER) && (pFmt->wBorders & 8))
 549     wc.pt.y += border;
 550   if (tp->member.para.pFmt->dwMask & PFM_SPACEAFTER)
 551     wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceAfter);
 552
 553   tp->member.para.nFlags &= ~MEPF_REWRAP;
 554   tp->member.para.nHeight = wc.pt.y;
 555   tp->member.para.nRows = wc.nRow;
 556 }
 557
 558
 559 static void ME_PrepareParagraphForWrapping(ME_Context *c, ME_DisplayItem *tp) {
 560   ME_DisplayItem *p, *pRow;
 561
 562   tp->member.para.nWidth = 0;
 563   /* remove all items that will be reinserted by paragraph wrapper anyway */
 564   tp->member.para.nRows = 0;
 565   for (p = tp->next; p!=tp->member.para.next_para; p = p->next) {
 566     switch(p->type) {
 567       case diStartRow:
 568         pRow = p;
 569         p = p->prev;
 570         ME_Remove(pRow);
 571         ME_DestroyDisplayItem(pRow);
 572         break;
 573       default:
 574         break;
 575     }
 576   }
 577   /* join runs that can be joined, set up flags */
 578   for (p = tp->next; p!=tp->member.para.next_para; p = p->next) {
 579     switch(p->type) {
 580       case diStartRow: assert(0); break; /* should have deleted it */
 581       case diRun:
 582         while (p->next->type == diRun) { /* FIXME */
 583           if (ME_CanJoinRuns(&p->member.run, &p->next->member.run)) {
 584             ME_JoinRuns(c->editor, p);
 585           }
 586           else
 587             break;
 588         }
 589         break;
 590       default:
 591         break;
 592     }
 593   }
 594 }
 595
 596 BOOL ME_WrapMarkedParagraphs(ME_TextEditor *editor)
 597 {
 598   ME_DisplayItem *item;
 599   ME_Context c;
 600   BOOL bModified = FALSE;
 601   int totalWidth = 0;
 602
 603   ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
 604   c.pt.x = 0;
 605   item = editor->pBuffer->pFirst->next;
 606   while(item != editor->pBuffer->pLast) {
 607     BOOL bRedraw = FALSE;
 608
 609     assert(item->type == diParagraph);
 610     if ((item->member.para.nFlags & MEPF_REWRAP)
 611      || (item->member.para.pt.y != c.pt.y))
 612       bRedraw = TRUE;
 613     item->member.para.pt = c.pt;
 614
 615     ME_WrapTextParagraph(&c, item);
 616
 617     if (bRedraw)
 618       item->member.para.nFlags |= MEPF_REPAINT;
 619
 620     bModified = bModified | bRedraw;
 621
 622     if (item->member.para.nFlags & MEPF_ROWSTART)
 623     {
 624       ME_DisplayItem *cell = ME_FindItemFwd(item, diCell);
 625       ME_DisplayItem *endRowPara;
 626       int borderWidth = 0;
 627       cell->member.cell.pt = c.pt;
 628       /* Offset the text by the largest top border width. */
 629       while (cell->member.cell.next_cell) {
 630         borderWidth = max(borderWidth, cell->member.cell.border.top.width);
 631         cell = cell->member.cell.next_cell;
 632       }
 633       endRowPara = ME_FindItemFwd(cell, diParagraph);
 634       assert(endRowPara->member.para.nFlags & MEPF_ROWEND);
 635       if (borderWidth > 0)
 636       {
 637         borderWidth = max(ME_twips2pointsY(&c, borderWidth), 1);
 638         while (cell) {
 639           cell->member.cell.yTextOffset = borderWidth;
 640           cell = cell->member.cell.prev_cell;
 641         }
 642         c.pt.y += borderWidth;
 643       }
 644       if (endRowPara->member.para.pFmt->dxStartIndent > 0)
 645       {
 646         int dxStartIndent = endRowPara->member.para.pFmt->dxStartIndent;
 647         cell = ME_FindItemFwd(item, diCell);
 648         cell->member.cell.pt.x += ME_twips2pointsX(&c, dxStartIndent);
 649         c.pt.x = cell->member.cell.pt.x;
 650       }
 651     }
 652     else if (item->member.para.nFlags & MEPF_ROWEND)
 653     {
 654       /* Set all the cells to the height of the largest cell */
 655       ME_DisplayItem *startRowPara;
 656       int prevHeight, nHeight, bottomBorder = 0;
 657       ME_DisplayItem *cell = ME_FindItemBack(item, diCell);
 658       item->member.para.nWidth = cell->member.cell.pt.x + cell->member.cell.nWidth;
 659       if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWSTART))
 660       {
 661         /* Last row, the bottom border is added to the height. */
 662         cell = cell->member.cell.prev_cell;
 663         while (cell)
 664         {
 665           bottomBorder = max(bottomBorder, cell->member.cell.border.bottom.width);
 666           cell = cell->member.cell.prev_cell;
 667         }
 668         bottomBorder = ME_twips2pointsY(&c, bottomBorder);
 669         cell = ME_FindItemBack(item, diCell);
 670       }
 671       prevHeight = cell->member.cell.nHeight;
 672       nHeight = cell->member.cell.prev_cell->member.cell.nHeight + bottomBorder;
 673       cell->member.cell.nHeight = nHeight;
 674       item->member.para.nHeight = nHeight;
 675       cell = cell->member.cell.prev_cell;
 676       cell->member.cell.nHeight = nHeight;
 677       while (cell->member.cell.prev_cell)
 678       {
 679         cell = cell->member.cell.prev_cell;
 680         cell->member.cell.nHeight = nHeight;
 681       }
 682       /* Also set the height of the start row paragraph */
 683       startRowPara = ME_FindItemBack(cell, diParagraph);
 684       startRowPara->member.para.nHeight = nHeight;
 685       c.pt.x = startRowPara->member.para.pt.x;
 686       c.pt.y = cell->member.cell.pt.y + nHeight;
 687       if (prevHeight < nHeight)
 688       {
 689         /* The height of the cells has grown, so invalidate the bottom of
 690          * the cells. */
 691         item->member.para.nFlags |= MEPF_REPAINT;
 692         cell = ME_FindItemBack(item, diCell);
 693         while (cell) {
 694           ME_FindItemBack(cell, diParagraph)->member.para.nFlags |= MEPF_REPAINT;
 695           cell = cell->member.cell.prev_cell;
 696         }
 697       }
 698     }
 699     else if (item->member.para.pCell &&
 700              item->member.para.pCell != item->member.para.next_para->member.para.pCell)
 701     {
 702       /* The next paragraph is in the next cell in the table row. */
 703       ME_Cell *cell = &item->member.para.pCell->member.cell;
 704       cell->nHeight = c.pt.y + item->member.para.nHeight - cell->pt.y;
 705
 706       /* Propagate the largest height to the end so that it can be easily
 707        * sent back to all the cells at the end of the row. */
 708       if (cell->prev_cell)
 709         cell->nHeight = max(cell->nHeight, cell->prev_cell->member.cell.nHeight);
 710
 711       c.pt.x = cell->pt.x + cell->nWidth;
 712       c.pt.y = cell->pt.y;
 713       cell->next_cell->member.cell.pt = c.pt;
 714       if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWEND))
 715         c.pt.y += cell->yTextOffset;
 716     }
 717     else
 718     {
 719       if (item->member.para.pCell) {
 720         /* Next paragraph in the same cell. */
 721         c.pt.x = item->member.para.pCell->member.cell.pt.x;
 722       } else {
 723         /* Normal paragraph */
 724         c.pt.x = 0;
 725       }
 726       c.pt.y += item->member.para.nHeight;
 727     }
 728
 729     totalWidth = max(totalWidth, item->member.para.nWidth);
 730     item = item->member.para.next_para;
 731   }
 732   editor->sizeWindow.cx = c.rcView.right-c.rcView.left;
 733   editor->sizeWindow.cy = c.rcView.bottom-c.rcView.top;
 734
 735   editor->nTotalLength = c.pt.y;
 736   editor->nTotalWidth = totalWidth;
 737   editor->pBuffer->pLast->member.para.pt.x = 0;
 738   editor->pBuffer->pLast->member.para.pt.y = c.pt.y;
 739
 740   ME_DestroyContext(&c);
 741
 742   if (bModified || editor->nTotalLength < editor->nLastTotalLength)
 743     ME_InvalidateMarkedParagraphs(editor);
 744   return bModified;
 745 }
 746
 747 void ME_InvalidateMarkedParagraphs(ME_TextEditor *editor)
 748 {
 749   ME_Context c;
 750   RECT rc;
 751   int ofs;
 752   ME_DisplayItem *item;
 753
 754   ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
 755   rc = c.rcView;
 756   ofs = editor->vert_si.nPos;
 757
 758   item = editor->pBuffer->pFirst;
 759   while(item != editor->pBuffer->pLast) {
 760     if (item->member.para.nFlags & MEPF_REPAINT) {
 761       rc.top = c.rcView.top + item->member.para.pt.y - ofs;
 762       rc.bottom = max(c.rcView.top + item->member.para.pt.y
 763                       + item->member.para.nHeight - ofs,
 764                       c.rcView.bottom);
 765       ITextHost_TxInvalidateRect(editor->texthost, &rc, TRUE);
 766     }
 767     item = item->member.para.next_para;
 768   }
 769   if (editor->nTotalLength < editor->nLastTotalLength)
 770   {
 771     rc.top = c.rcView.top + editor->nTotalLength - ofs;
 772     rc.bottom = c.rcView.top + editor->nLastTotalLength - ofs;
 773     ITextHost_TxInvalidateRect(editor->texthost, &rc, TRUE);
 774   }
 775   ME_DestroyContext(&c);
 776 }
 777
 778
 779 void
 780 ME_SendRequestResize(ME_TextEditor *editor, BOOL force)
 781 {
 782   if (editor->nEventMask & ENM_REQUESTRESIZE)
 783   {
 784     RECT rc;
 785
 786     ITextHost_TxGetClientRect(editor->texthost, &rc);
 787
 788     if (force || rc.bottom != editor->nTotalLength)
 789     {
 790       REQRESIZE info;
 791
 792       info.nmhdr.hwndFrom = NULL;
 793       info.nmhdr.idFrom = 0;
 794       info.nmhdr.code = EN_REQUESTRESIZE;
 795       info.rc = rc;
 796       info.rc.right = editor->nTotalWidth;
 797       info.rc.bottom = editor->nTotalLength;
 798
 799       editor->nEventMask &= ~ENM_REQUESTRESIZE;
 800       ITextHost_TxNotify(editor->texthost, info.nmhdr.code, &info);
 801       editor->nEventMask |= ENM_REQUESTRESIZE;
 802     }
 803   }
 804 }