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, ME_DisplayItem *para)
  46 {
  47   PARAFORMAT2 *pFmt;
  48   assert(para && para->type == diParagraph);
  49   pFmt = para->member.para.pFmt;
  50   wc->pRowStart = NULL;
  51   wc->bOverflown = FALSE;
  52   wc->pLastSplittableRun = NULL;
  53   wc->bWordWrap = wc->context->editor->bWordWrap;
  54   if (para->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND)) {
  55     wc->nAvailWidth = 0;
  56     wc->bWordWrap = FALSE;
  57     if (para->member.para.nFlags & MEPF_ROWEND)
  58     {
  59       ME_Cell *cell = &ME_FindItemBack(para, diCell)->member.cell;
  60       cell->nWidth = 0;
  61     }
  62   } else if (para->member.para.pCell) {
  63     ME_Cell *cell = &para->member.para.pCell->member.cell;
  64     int width;
  65
  66     width = cell->nRightBoundary;
  67     if (cell->prev_cell)
  68       width -= cell->prev_cell->member.cell.nRightBoundary;
  69     if (!cell->prev_cell)
  70     {
  71       int rowIndent = ME_GetTableRowEnd(para)->member.para.pFmt->dxStartIndent;
  72       width -= rowIndent;
  73     }
  74     cell->nWidth = max(ME_twips2pointsX(wc->context, width), 0);
  75
  76     wc->nAvailWidth = cell->nWidth
  77         - (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
  78     wc->bWordWrap = TRUE;
  79   } else {
  80     wc->nAvailWidth = wc->context->rcView.right - wc->context->rcView.left
  81         - (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
  82   }
  83   wc->pt.x = wc->context->pt.x;
  84   if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
  85       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
  86     /* Shift the text down because of the border. */
  87     wc->pt.y++;
  88 }
  89
  90 static void ME_InsertRowStart(ME_WrapContext *wc, const ME_DisplayItem *pEnd)
  91 {
  92   ME_DisplayItem *p, *row, *para;
  93   BOOL bSkippingSpaces = TRUE;
  94   int ascent = 0, descent = 0, width=0, shift = 0, align = 0;
  95   PARAFORMAT2 *pFmt;
  96   /* wrap text */
  97   para = ME_GetParagraph(wc->pRowStart);
  98   pFmt = para->member.para.pFmt;
  99
 100   for (p = pEnd->prev; p!=wc->pRowStart->prev; p = p->prev)
 101   {
 102       /* ENDPARA run shouldn't affect row height, except if it's the only run in the paragraph */
 103       if (p->type==diRun && ((p==wc->pRowStart) || !(p->member.run.nFlags & MERF_ENDPARA))) { /* FIXME add more run types */
 104         if (p->member.run.nAscent>ascent)
 105           ascent = p->member.run.nAscent;
 106         if (p->member.run.nDescent>descent)
 107           descent = p->member.run.nDescent;
 108         if (bSkippingSpaces)
 109         {
 110           /* Exclude space characters from run width.
 111            * Other whitespace or delimiters are not treated this way. */
 112           SIZE sz;
 113           int len = p->member.run.strText->nLen;
 114           WCHAR *text = p->member.run.strText->szData + len - 1;
 115
 116           assert (len);
 117           while (len && *(text--) == ' ')
 118               len--;
 119           if (len)
 120           {
 121               if (len == p->member.run.strText->nLen)
 122               {
 123                   width += p->member.run.nWidth;
 124               } else {
 125                   sz = ME_GetRunSize(wc->context, &para->member.para,
 126                                      &p->member.run, len, p->member.run.pt.x);
 127                   width += sz.cx;
 128               }
 129           }
 130           bSkippingSpaces = !len;
 131         } else if (!(p->member.run.nFlags & MERF_ENDPARA))
 132           width += p->member.run.nWidth;
 133       }
 134   }
 135
 136   row = ME_MakeRow(ascent+descent, ascent, width);
 137   if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
 138       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
 139   {
 140     /* The text was shifted down in ME_BeginRow so move the wrap context
 141      * back to where it should be. */
 142     wc->pt.y--;
 143     /* The height of the row is increased by the borders. */
 144     row->member.row.nHeight += 2;
 145   }
 146   row->member.row.pt = wc->pt;
 147   row->member.row.nLMargin = (!wc->nRow ? wc->nFirstMargin : wc->nLeftMargin);
 148   row->member.row.nRMargin = wc->nRightMargin;
 149   assert(para->member.para.pFmt->dwMask & PFM_ALIGNMENT);
 150   align = para->member.para.pFmt->wAlignment;
 151   if (align == PFA_CENTER)
 152     shift = max((wc->nAvailWidth-width)/2, 0);
 153   if (align == PFA_RIGHT)
 154     shift = max(wc->nAvailWidth-width, 0);
 155   for (p = wc->pRowStart; p!=pEnd; p = p->next)
 156   {
 157     if (p->type==diRun) { /* FIXME add more run types */
 158       p->member.run.pt.x += row->member.row.nLMargin+shift;
 159     }
 160   }
 161   ME_InsertBefore(wc->pRowStart, row);
 162   wc->nRow++;
 163   wc->pt.y += row->member.row.nHeight;
 164   ME_BeginRow(wc, para);
 165 }
 166
 167 static void ME_WrapEndParagraph(ME_WrapContext *wc, ME_DisplayItem *p)
 168 {
 169   ME_DisplayItem *para = p->member.para.prev_para;
 170   PARAFORMAT2 *pFmt = para->member.para.pFmt;
 171   if (wc->pRowStart)
 172     ME_InsertRowStart(wc, p);
 173   if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
 174       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
 175   {
 176     /* ME_BeginRow was called an extra time for the paragraph, and it shifts the
 177      * text down by one pixel for the border, so fix up the wrap context. */
 178     wc->pt.y--;
 179   }
 180
 181   /*
 182   p = p->member.para.prev_para->next;
 183   while(p) {
 184     if (p->type == diParagraph || p->type == diTextEnd)
 185       return;
 186     if (p->type == diRun)
 187     {
 188       ME_Run *run = &p->member.run;
 189       TRACE("%s - (%d, %d)\n", debugstr_w(run->strText->szData), run->pt.x, run->pt.y);
 190     }
 191     p = p->next;
 192   }
 193   */
 194 }
 195
 196 static void ME_WrapSizeRun(ME_WrapContext *wc, ME_DisplayItem *p)
 197 {
 198   /* FIXME compose style (out of character and paragraph styles) here */
 199
 200   ME_UpdateRunFlags(wc->context->editor, &p->member.run);
 201
 202   ME_CalcRunExtent(wc->context, &ME_GetParagraph(p)->member.para,
 203                    wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, &p->member.run);
 204 }
 205
 206 static ME_DisplayItem *ME_MaximizeSplit(ME_WrapContext *wc, ME_DisplayItem *p, int i)
 207 {
 208   ME_DisplayItem *pp, *piter = p;
 209   int j;
 210   if (!i)
 211     return NULL;
 212   j = ME_ReverseFindNonWhitespaceV(p->member.run.strText, i);
 213   if (j>0) {
 214     pp = ME_SplitRun(wc, piter, j);
 215     wc->pt.x += piter->member.run.nWidth;
 216     return pp;
 217   }
 218   else
 219   {
 220     pp = piter;
 221     /* omit all spaces before split point */
 222     while(piter != wc->pRowStart)
 223     {
 224       piter = ME_FindItemBack(piter, diRun);
 225       if (piter->member.run.nFlags & MERF_WHITESPACE)
 226       {
 227         pp = piter;
 228         continue;
 229       }
 230       if (piter->member.run.nFlags & MERF_ENDWHITE)
 231       {
 232         j = ME_ReverseFindNonWhitespaceV(piter->member.run.strText, i);
 233         pp = ME_SplitRun(wc, piter, i);
 234         wc->pt = pp->member.run.pt;
 235         return pp;
 236       }
 237       /* this run is the end of spaces, so the run edge is a good point to split */
 238       wc->pt = pp->member.run.pt;
 239       wc->bOverflown = TRUE;
 240       TRACE("Split point is: %s|%s\n", debugstr_w(piter->member.run.strText->szData), debugstr_w(pp->member.run.strText->szData));
 241       return pp;
 242     }
 243     wc->pt = piter->member.run.pt;
 244     return piter;
 245   }
 246 }
 247
 248 static ME_DisplayItem *ME_SplitByBacktracking(ME_WrapContext *wc, ME_DisplayItem *p, int loc)
 249 {
 250   ME_DisplayItem *piter = p, *pp;
 251   int i, idesp, len;
 252   ME_Run *run = &p->member.run;
 253
 254   idesp = i = ME_CharFromPoint(wc->context, loc, run);
 255   len = ME_StrVLen(run->strText);
 256   assert(len>0);
 257   assert(i<len);
 258   if (i) {
 259     /* don't split words */
 260     i = ME_ReverseFindWhitespaceV(run->strText, i);
 261     pp = ME_MaximizeSplit(wc, p, i);
 262     if (pp)
 263       return pp;
 264   }
 265   TRACE("Must backtrack to split at: %s\n", debugstr_w(p->member.run.strText->szData));
 266   if (wc->pLastSplittableRun)
 267   {
 268     if (wc->pLastSplittableRun->member.run.nFlags & (MERF_GRAPHICS|MERF_TAB))
 269     {
 270       wc->pt = wc->ptLastSplittableRun;
 271       return wc->pLastSplittableRun;
 272     }
 273     else if (wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE)
 274     {
 275       /* the following two lines are just to check if we forgot to call UpdateRunFlags earlier,
 276          they serve no other purpose */
 277       ME_UpdateRunFlags(wc->context->editor, run);
 278       assert((wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE));
 279
 280       piter = wc->pLastSplittableRun;
 281       run = &piter->member.run;
 282       len = ME_StrVLen(run->strText);
 283       /* don't split words */
 284       i = ME_ReverseFindWhitespaceV(run->strText, len);
 285       if (i == len)
 286         i = ME_ReverseFindNonWhitespaceV(run->strText, len);
 287       if (i) {
 288         ME_DisplayItem *piter2 = ME_SplitRun(wc, piter, i);
 289         wc->pt = piter2->member.run.pt;
 290         return piter2;
 291       }
 292       /* splittable = must have whitespaces */
 293       assert(0 == "Splittable, but no whitespaces");
 294     }
 295     else
 296     {
 297       /* restart from the first run beginning with spaces */
 298       wc->pt = wc->ptLastSplittableRun;
 299       return wc->pLastSplittableRun;
 300     }
 301   }
 302   TRACE("Backtracking failed, trying desperate: %s\n", debugstr_w(p->member.run.strText->szData));
 303   /* OK, no better idea, so assume we MAY split words if we can split at all*/
 304   if (idesp)
 305     return ME_SplitRun(wc, piter, idesp);
 306   else
 307   if (wc->pRowStart && piter != wc->pRowStart)
 308   {
 309     /* don't need to break current run, because it's possible to split
 310        before this run */
 311     wc->bOverflown = TRUE;
 312     return piter;
 313   }
 314   else
 315   {
 316     /* split point inside first character - no choice but split after that char */
 317     int chars = 1;
 318     int pos2 = ME_StrRelPos(run->strText, 0, &chars);
 319     if (pos2 != len) {
 320       /* the run is more than 1 char, so we may split */
 321       return ME_SplitRun(wc, piter, pos2);
 322     }
 323     /* the run is one char, can't split it */
 324     return piter;
 325   }
 326 }
 327
 328 static ME_DisplayItem *ME_WrapHandleRun(ME_WrapContext *wc, ME_DisplayItem *p)
 329 {
 330   ME_DisplayItem *pp;
 331   ME_Run *run;
 332   int len;
 333
 334   assert(p->type == diRun);
 335   if (!wc->pRowStart)
 336     wc->pRowStart = p;
 337   run = &p->member.run;
 338   run->pt.x = wc->pt.x;
 339   run->pt.y = wc->pt.y;
 340   ME_WrapSizeRun(wc, p);
 341   len = ME_StrVLen(run->strText);
 342
 343   if (wc->bOverflown) /* just skipping final whitespaces */
 344   {
 345     /* End paragraph run can't overflow to the next line by itself. */
 346     if (run->nFlags & MERF_ENDPARA)
 347       return p->next;
 348
 349     if (run->nFlags & MERF_WHITESPACE) {
 350       p->member.run.nFlags |= MERF_SKIPPED;
 351       wc->pt.x += run->nWidth;
 352       /* skip runs consisting of only whitespaces */
 353       return p->next;
 354     }
 355
 356     if (run->nFlags & MERF_STARTWHITE) {
 357       /* try to split the run at the first non-white char */
 358       int black;
 359       black = ME_FindNonWhitespaceV(run->strText, 0);
 360       if (black) {
 361         wc->bOverflown = FALSE;
 362         pp = ME_SplitRun(wc, p, black);
 363         p->member.run.nFlags |= MERF_SKIPPED;
 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     wc->ptLastSplittableRun = wc->pt;
 453   }
 454   wc->pt.x += run->nWidth;
 455   return p->next;
 456 }
 457
 458 static void ME_PrepareParagraphForWrapping(ME_Context *c, ME_DisplayItem *tp);
 459
 460 static void ME_WrapTextParagraph(ME_Context *c, ME_DisplayItem *tp) {
 461   ME_DisplayItem *p;
 462   ME_WrapContext wc;
 463   int border = 0;
 464   int linespace = 0;
 465   PARAFORMAT2 *pFmt;
 466
 467   assert(tp->type == diParagraph);
 468   if (!(tp->member.para.nFlags & MEPF_REWRAP)) {
 469     return;
 470   }
 471   ME_PrepareParagraphForWrapping(c, tp);
 472   pFmt = tp->member.para.pFmt;
 473
 474   wc.context = c;
 475 /*   wc.para_style = tp->member.para.style; */
 476   wc.style = NULL;
 477   if (tp->member.para.nFlags & MEPF_ROWEND) {
 478     wc.nFirstMargin = wc.nLeftMargin = wc.nRightMargin = 0;
 479   } else {
 480     int dxStartIndent = pFmt->dxStartIndent;
 481     if (tp->member.para.pCell) {
 482       dxStartIndent += ME_GetTableRowEnd(tp)->member.para.pFmt->dxOffset;
 483     }
 484     wc.nFirstMargin = ME_twips2pointsX(c, dxStartIndent);
 485     wc.nLeftMargin = wc.nFirstMargin + ME_twips2pointsX(c, pFmt->dxOffset);
 486     wc.nRightMargin = ME_twips2pointsX(c, pFmt->dxRightIndent);
 487   }
 488   if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
 489       pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
 490   {
 491     wc.nFirstMargin += ME_twips2pointsX(c, pFmt->dxOffset * 2);
 492   }
 493   wc.nRow = 0;
 494   wc.pt.y = 0;
 495   if (pFmt->dwMask & PFM_SPACEBEFORE)
 496     wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceBefore);
 497   if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
 498       pFmt->dwMask & PFM_BORDER)
 499   {
 500     border = ME_GetParaBorderWidth(c->editor, tp->member.para.pFmt->wBorders);
 501     if (pFmt->wBorders & 1) {
 502       wc.nFirstMargin += border;
 503       wc.nLeftMargin += border;
 504     }
 505     if (pFmt->wBorders & 2)
 506       wc.nRightMargin -= border;
 507     if (pFmt->wBorders & 4)
 508       wc.pt.y += border;
 509   }
 510
 511   linespace = ME_GetParaLineSpace(c, &tp->member.para);
 512
 513   ME_BeginRow(&wc, tp);
 514   for (p = tp->next; p!=tp->member.para.next_para; ) {
 515     assert(p->type != diStartRow);
 516     if (p->type == diRun) {
 517       p = ME_WrapHandleRun(&wc, p);
 518     }
 519     else p = p->next;
 520     if (wc.nRow && p == wc.pRowStart)
 521       wc.pt.y += linespace;
 522   }
 523   ME_WrapEndParagraph(&wc, p);
 524   if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
 525       (pFmt->dwMask & PFM_BORDER) && (pFmt->wBorders & 8))
 526     wc.pt.y += border;
 527   if (tp->member.para.pFmt->dwMask & PFM_SPACEAFTER)
 528     wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceAfter);
 529
 530   tp->member.para.nFlags &= ~MEPF_REWRAP;
 531   tp->member.para.nHeight = wc.pt.y;
 532   tp->member.para.nRows = wc.nRow;
 533 }
 534
 535
 536 static void ME_PrepareParagraphForWrapping(ME_Context *c, ME_DisplayItem *tp) {
 537   ME_DisplayItem *p, *pRow;
 538
 539   /* remove all items that will be reinserted by paragraph wrapper anyway */
 540   tp->member.para.nRows = 0;
 541   for (p = tp->next; p!=tp->member.para.next_para; p = p->next) {
 542     switch(p->type) {
 543       case diStartRow:
 544         pRow = p;
 545         p = p->prev;
 546         ME_Remove(pRow);
 547         ME_DestroyDisplayItem(pRow);
 548         break;
 549       default:
 550         break;
 551     }
 552   }
 553   /* join runs that can be joined, set up flags */
 554   for (p = tp->next; p!=tp->member.para.next_para; p = p->next) {
 555     int changed = 0;
 556     switch(p->type) {
 557       case diStartRow: assert(0); break; /* should have deleted it */
 558       case diRun:
 559         while (p->next->type == diRun) { /* FIXME */
 560           if (ME_CanJoinRuns(&p->member.run, &p->next->member.run)) {
 561             ME_JoinRuns(c->editor, p);
 562             changed = 1;
 563           }
 564           else
 565             break;
 566         }
 567         p->member.run.nFlags &= ~MERF_CALCBYWRAP;
 568         break;
 569       default:
 570         break;
 571     }
 572   }
 573 }
 574
 575 BOOL ME_WrapMarkedParagraphs(ME_TextEditor *editor)
 576 {
 577   ME_DisplayItem *item;
 578   ME_Context c;
 579   BOOL bModified = FALSE;
 580   int yStart = -1;
 581
 582   ME_InitContext(&c, editor, GetDC(editor->hWnd));
 583   c.pt.x = 0;
 584   item = editor->pBuffer->pFirst->next;
 585   while(item != editor->pBuffer->pLast) {
 586     BOOL bRedraw = FALSE;
 587
 588     assert(item->type == diParagraph);
 589     if ((item->member.para.nFlags & MEPF_REWRAP)
 590      || (item->member.para.pt.y != c.pt.y))
 591       bRedraw = TRUE;
 592     item->member.para.pt = c.pt;
 593
 594     ME_WrapTextParagraph(&c, item);
 595
 596     if (bRedraw)
 597     {
 598       item->member.para.nFlags |= MEPF_REPAINT;
 599       if (yStart == -1)
 600         yStart = c.pt.y;
 601     }
 602
 603     bModified = bModified | bRedraw;
 604
 605     if (item->member.para.nFlags & MEPF_ROWSTART)
 606     {
 607       ME_DisplayItem *cell = ME_FindItemFwd(item, diCell);
 608       ME_DisplayItem *endRowPara;
 609       int borderWidth = 0;
 610       cell->member.cell.pt = c.pt;
 611       /* Offset the text by the largest top border width. */
 612       while (cell->member.cell.next_cell) {
 613         borderWidth = max(borderWidth, cell->member.cell.border.top.width);
 614         cell = cell->member.cell.next_cell;
 615       }
 616       endRowPara = ME_FindItemFwd(cell, diParagraph);
 617       assert(endRowPara->member.para.nFlags & MEPF_ROWEND);
 618       if (borderWidth > 0)
 619       {
 620         borderWidth = max(ME_twips2pointsY(&c, borderWidth), 1);
 621         while (cell) {
 622           cell->member.cell.yTextOffset = borderWidth;
 623           cell = cell->member.cell.prev_cell;
 624         }
 625         c.pt.y += borderWidth;
 626       }
 627       if (endRowPara->member.para.pFmt->dxStartIndent > 0)
 628       {
 629         int dxStartIndent = endRowPara->member.para.pFmt->dxStartIndent;
 630         cell = ME_FindItemFwd(item, diCell);
 631         cell->member.cell.pt.x += ME_twips2pointsX(&c, dxStartIndent);
 632         c.pt.x = cell->member.cell.pt.x;
 633       }
 634     }
 635     else if (item->member.para.nFlags & MEPF_ROWEND)
 636     {
 637       /* Set all the cells to the height of the largest cell */
 638       ME_DisplayItem *startRowPara;
 639       int prevHeight, nHeight, bottomBorder = 0;
 640       ME_DisplayItem *cell = ME_FindItemBack(item, diCell);
 641       if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWSTART))
 642       {
 643         /* Last row, the bottom border is added to the height. */
 644         cell = cell->member.cell.prev_cell;
 645         while (cell)
 646         {
 647           bottomBorder = max(bottomBorder, cell->member.cell.border.bottom.width);
 648           cell = cell->member.cell.prev_cell;
 649         }
 650         bottomBorder = ME_twips2pointsY(&c, bottomBorder);
 651         cell = ME_FindItemBack(item, diCell);
 652       }
 653       prevHeight = cell->member.cell.nHeight;
 654       nHeight = cell->member.cell.prev_cell->member.cell.nHeight + bottomBorder;
 655       cell->member.cell.nHeight = nHeight;
 656       item->member.para.nHeight = nHeight;
 657       cell = cell->member.cell.prev_cell;
 658       cell->member.cell.nHeight = nHeight;
 659       while (cell->member.cell.prev_cell)
 660       {
 661         cell = cell->member.cell.prev_cell;
 662         cell->member.cell.nHeight = nHeight;
 663       }
 664       /* Also set the height of the start row paragraph */
 665       startRowPara = ME_FindItemBack(cell, diParagraph);
 666       startRowPara->member.para.nHeight = nHeight;
 667       c.pt.x = startRowPara->member.para.pt.x;
 668       c.pt.y = cell->member.cell.pt.y + nHeight;
 669       if (prevHeight < nHeight)
 670       {
 671         /* The height of the cells has grown, so invalidate the bottom of
 672          * the cells. */
 673         item->member.para.nFlags |= MEPF_REPAINT;
 674         cell = ME_FindItemBack(item, diCell);
 675         while (cell) {
 676           ME_FindItemBack(cell, diParagraph)->member.para.nFlags |= MEPF_REPAINT;
 677           cell = cell->member.cell.prev_cell;
 678         }
 679       }
 680     }
 681     else if (item->member.para.pCell &&
 682              item->member.para.pCell != item->member.para.next_para->member.para.pCell)
 683     {
 684       /* The next paragraph is in the next cell in the table row. */
 685       ME_Cell *cell = &item->member.para.pCell->member.cell;
 686       cell->nHeight = c.pt.y + item->member.para.nHeight - cell->pt.y;
 687
 688       /* Propagate the largest height to the end so that it can be easily
 689        * sent back to all the cells at the end of the row. */
 690       if (cell->prev_cell)
 691         cell->nHeight = max(cell->nHeight, cell->prev_cell->member.cell.nHeight);
 692
 693       c.pt.x = cell->pt.x + cell->nWidth;
 694       c.pt.y = cell->pt.y;
 695       cell->next_cell->member.cell.pt = c.pt;
 696       if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWEND))
 697         c.pt.y += cell->yTextOffset;
 698     }
 699     else
 700     {
 701       if (item->member.para.pCell) {
 702         /* Next paragraph in the same cell. */
 703         c.pt.x = item->member.para.pCell->member.cell.pt.x;
 704       } else {
 705         /* Normal paragraph */
 706         c.pt.x = 0;
 707       }
 708       c.pt.y += item->member.para.nHeight;
 709     }
 710     item = item->member.para.next_para;
 711   }
 712   editor->sizeWindow.cx = c.rcView.right-c.rcView.left;
 713   editor->sizeWindow.cy = c.rcView.bottom-c.rcView.top;
 714
 715   editor->nTotalLength = c.pt.y;
 716   editor->pBuffer->pLast->member.para.pt.x = 0;
 717   editor->pBuffer->pLast->member.para.pt.y = c.pt.y;
 718
 719   ME_DestroyContext(&c, editor->hWnd);
 720
 721   if (bModified || editor->nTotalLength < editor->nLastTotalLength)
 722     ME_InvalidateMarkedParagraphs(editor);
 723   return bModified;
 724 }
 725
 726 void ME_InvalidateMarkedParagraphs(ME_TextEditor *editor)
 727 {
 728   ME_Context c;
 729   RECT rc;
 730   int ofs;
 731   ME_DisplayItem *item;
 732
 733   ME_InitContext(&c, editor, GetDC(editor->hWnd));
 734   rc = c.rcView;
 735   ofs = ME_GetYScrollPos(editor);
 736
 737   item = editor->pBuffer->pFirst;
 738   while(item != editor->pBuffer->pLast) {
 739     if (item->member.para.nFlags & MEPF_REPAINT) {
 740       rc.top = c.rcView.top + item->member.para.pt.y - ofs;
 741       rc.bottom = max(c.rcView.top + item->member.para.pt.y
 742                       + item->member.para.nHeight - ofs,
 743                       c.rcView.bottom);
 744       InvalidateRect(editor->hWnd, &rc, TRUE);
 745     }
 746     item = item->member.para.next_para;
 747   }
 748   if (editor->nTotalLength < editor->nLastTotalLength)
 749   {
 750     rc.top = c.rcView.top + editor->nTotalLength - ofs;
 751     rc.bottom = c.rcView.top + editor->nLastTotalLength - ofs;
 752     InvalidateRect(editor->hWnd, &rc, TRUE);
 753   }
 754   ME_DestroyContext(&c, editor->hWnd);
 755 }
 756
 757
 758 void
 759 ME_SendRequestResize(ME_TextEditor *editor, BOOL force)
 760 {
 761   if (editor->nEventMask & ENM_REQUESTRESIZE)
 762   {
 763     RECT rc;
 764
 765     GetClientRect(editor->hWnd, &rc);
 766
 767     if (force || rc.bottom != editor->nTotalLength)
 768     {
 769       REQRESIZE info;
 770
 771       info.nmhdr.hwndFrom = editor->hWnd;
 772       info.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
 773       info.nmhdr.code = EN_REQUESTRESIZE;
 774       info.rc = rc;
 775       info.rc.bottom = editor->nTotalLength;
 776
 777       editor->nEventMask &= ~ENM_REQUESTRESIZE;
 778       SendMessageW(GetParent(editor->hWnd), WM_NOTIFY,
 779                    info.nmhdr.idFrom, (LPARAM)&info);
 780       editor->nEventMask |= ENM_REQUESTRESIZE;
 781     }
 782   }
 783 }