2 * RichEdit - Paragraph wrapping. Don't try to understand it. You've been
5 * Copyright 2004 by Krzysztof Foltman
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.
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.
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
25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
30 * - center and right align in WordPad omits all spaces at the start, we don't
31 * - objects/images are not handled yet
35 /******************************************************************************
38 * Updates the size of the run (fills width, ascent and descent). The height
39 * is calculated based on whole row's ascent and descent anyway, so no need
42 static void calc_run_extent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run)
44 if (run->nFlags & MERF_HIDDEN) run->nWidth = 0;
47 SIZE size = ME_GetRunSizeCommon( c, para, run, run->len, startx, &run->nAscent, &run->nDescent );
48 run->nWidth = size.cx;
52 /******************************************************************************
55 * Splits a run into two in a given place. It also updates the screen position
56 * and size (extent) of the newly generated runs.
58 static ME_DisplayItem *split_run_extents(ME_WrapContext *wc, ME_DisplayItem *item, int nVChar)
60 ME_TextEditor *editor = wc->context->editor;
62 ME_Paragraph *para = &wc->pPara->member.para;
63 ME_Cursor cursor = {wc->pPara, item, nVChar};
65 assert(item->member.run.nCharOfs != -1);
66 if(TRACE_ON(richedit))
68 TRACE("Before check before split\n");
69 ME_CheckCharOffsets(editor);
70 TRACE("After check before split\n");
73 run = &item->member.run;
75 TRACE("Before split: %s(%d, %d)\n", debugstr_run( run ),
76 run->pt.x, run->pt.y);
78 ME_SplitRunSimple(editor, &cursor);
80 run2 = &cursor.pRun->member.run;
82 calc_run_extent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run);
84 run2->pt.x = run->pt.x+run->nWidth;
85 run2->pt.y = run->pt.y;
87 if(TRACE_ON(richedit))
89 TRACE("Before check after split\n");
90 ME_CheckCharOffsets(editor);
91 TRACE("After check after split\n");
92 TRACE("After split: %s(%d, %d), %s(%d, %d)\n",
93 debugstr_run( run ), run->pt.x, run->pt.y,
94 debugstr_run( run2 ), run2->pt.x, run2->pt.y);
100 /******************************************************************************
103 * Returns a character position to split inside the run given a run-relative
104 * pixel horizontal position. This version rounds left (ie. if the second
105 * character is at pixel position 8, then for cx=0..7 it returns 0).
107 static int find_split_point( ME_Context *c, int cx, ME_Run *run )
109 if (!run->len || cx <= 0) return 0;
110 return ME_CharFromPointContext( c, cx, run, FALSE );
113 static ME_DisplayItem *ME_MakeRow(int height, int baseline, int width)
115 ME_DisplayItem *item = ME_MakeDI(diStartRow);
117 item->member.row.nHeight = height;
118 item->member.row.nBaseline = baseline;
119 item->member.row.nWidth = width;
123 static void ME_BeginRow(ME_WrapContext *wc)
126 ME_DisplayItem *para = wc->pPara;
128 pFmt = para->member.para.pFmt;
129 wc->pRowStart = NULL;
130 wc->bOverflown = FALSE;
131 wc->pLastSplittableRun = NULL;
132 wc->bWordWrap = wc->context->editor->bWordWrap;
133 if (para->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND)) {
135 wc->bWordWrap = FALSE;
136 if (para->member.para.nFlags & MEPF_ROWEND)
138 ME_Cell *cell = &ME_FindItemBack(para, diCell)->member.cell;
141 } else if (para->member.para.pCell) {
142 ME_Cell *cell = ¶->member.para.pCell->member.cell;
145 width = cell->nRightBoundary;
147 width -= cell->prev_cell->member.cell.nRightBoundary;
148 if (!cell->prev_cell)
150 int rowIndent = ME_GetTableRowEnd(para)->member.para.pFmt->dxStartIndent;
153 cell->nWidth = max(ME_twips2pointsX(wc->context, width), 0);
155 wc->nAvailWidth = cell->nWidth
156 - (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
157 wc->bWordWrap = TRUE;
159 wc->nAvailWidth = wc->context->nAvailWidth
160 - (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
162 wc->pt.x = wc->context->pt.x;
163 if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
164 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
165 /* Shift the text down because of the border. */
169 static void ME_InsertRowStart(ME_WrapContext *wc, const ME_DisplayItem *pEnd)
171 ME_DisplayItem *p, *row, *para;
172 BOOL bSkippingSpaces = TRUE;
173 int ascent = 0, descent = 0, width=0, shift = 0, align = 0;
177 pFmt = para->member.para.pFmt;
179 for (p = pEnd->prev; p!=wc->pRowStart->prev; p = p->prev)
181 /* ENDPARA run shouldn't affect row height, except if it's the only run in the paragraph */
182 if (p->type==diRun && ((p==wc->pRowStart) || !(p->member.run.nFlags & MERF_ENDPARA))) { /* FIXME add more run types */
183 if (p->member.run.nAscent>ascent)
184 ascent = p->member.run.nAscent;
185 if (p->member.run.nDescent>descent)
186 descent = p->member.run.nDescent;
189 /* Exclude space characters from run width.
190 * Other whitespace or delimiters are not treated this way. */
192 int len = p->member.run.len;
193 WCHAR *text = get_text( &p->member.run, len - 1 );
196 if (~p->member.run.nFlags & MERF_GRAPHICS)
197 while (len && *(text--) == ' ')
201 if (len == p->member.run.len)
203 width += p->member.run.nWidth;
205 sz = ME_GetRunSize(wc->context, ¶->member.para,
206 &p->member.run, len, p->member.run.pt.x);
210 bSkippingSpaces = !len;
211 } else if (!(p->member.run.nFlags & MERF_ENDPARA))
212 width += p->member.run.nWidth;
216 para->member.para.nWidth = max(para->member.para.nWidth, width);
217 row = ME_MakeRow(ascent+descent, ascent, width);
218 if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
219 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
221 /* The text was shifted down in ME_BeginRow so move the wrap context
222 * back to where it should be. */
224 /* The height of the row is increased by the borders. */
225 row->member.row.nHeight += 2;
227 row->member.row.pt = wc->pt;
228 row->member.row.nLMargin = (!wc->nRow ? wc->nFirstMargin : wc->nLeftMargin);
229 row->member.row.nRMargin = wc->nRightMargin;
230 assert(para->member.para.pFmt->dwMask & PFM_ALIGNMENT);
231 align = para->member.para.pFmt->wAlignment;
232 if (align == PFA_CENTER)
233 shift = max((wc->nAvailWidth-width)/2, 0);
234 if (align == PFA_RIGHT)
235 shift = max(wc->nAvailWidth-width, 0);
236 row->member.row.pt.x = row->member.row.nLMargin + shift;
237 for (p = wc->pRowStart; p!=pEnd; p = p->next)
239 if (p->type==diRun) { /* FIXME add more run types */
240 p->member.run.pt.x += row->member.row.nLMargin+shift;
243 ME_InsertBefore(wc->pRowStart, row);
245 wc->pt.y += row->member.row.nHeight;
249 static void ME_WrapEndParagraph(ME_WrapContext *wc, ME_DisplayItem *p)
251 ME_DisplayItem *para = wc->pPara;
252 PARAFORMAT2 *pFmt = para->member.para.pFmt;
254 ME_InsertRowStart(wc, p);
255 if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
256 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
258 /* ME_BeginRow was called an extra time for the paragraph, and it shifts the
259 * text down by one pixel for the border, so fix up the wrap context. */
266 if (p->type == diParagraph || p->type == diTextEnd)
268 if (p->type == diRun)
270 ME_Run *run = &p->member.run;
271 TRACE("%s - (%d, %d)\n", debugstr_run(run), run->pt.x, run->pt.y);
278 static void ME_WrapSizeRun(ME_WrapContext *wc, ME_DisplayItem *p)
280 /* FIXME compose style (out of character and paragraph styles) here */
282 ME_UpdateRunFlags(wc->context->editor, &p->member.run);
284 calc_run_extent(wc->context, &wc->pPara->member.para,
285 wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, &p->member.run);
289 static int find_non_whitespace(const WCHAR *s, int len, int start)
292 for (i = start; i < len && ME_IsWSpace( s[i] ); i++)
298 /* note: these two really return the first matching offset (starting from EOS)+1
299 * in other words, an offset of the first trailing white/black */
301 /* note: returns offset of the first trailing whitespace */
302 static int reverse_find_non_whitespace(const WCHAR *s, int start)
305 for (i = start; i > 0 && ME_IsWSpace( s[i - 1] ); i--)
311 /* note: returns offset of the first trailing nonwhitespace */
312 static int reverse_find_whitespace(const WCHAR *s, int start)
315 for (i = start; i > 0 && !ME_IsWSpace( s[i - 1] ); i--)
321 static ME_DisplayItem *ME_MaximizeSplit(ME_WrapContext *wc, ME_DisplayItem *p, int i)
323 ME_DisplayItem *pp, *piter = p;
327 j = reverse_find_non_whitespace( get_text( &p->member.run, 0 ), i);
329 pp = split_run_extents(wc, piter, j);
330 wc->pt.x += piter->member.run.nWidth;
336 /* omit all spaces before split point */
337 while(piter != wc->pRowStart)
339 piter = ME_FindItemBack(piter, diRun);
340 if (piter->member.run.nFlags & MERF_WHITESPACE)
345 if (piter->member.run.nFlags & MERF_ENDWHITE)
347 i = reverse_find_non_whitespace( get_text( &piter->member.run, 0 ),
348 piter->member.run.len );
349 pp = split_run_extents(wc, piter, i);
350 wc->pt = pp->member.run.pt;
353 /* this run is the end of spaces, so the run edge is a good point to split */
354 wc->pt = pp->member.run.pt;
355 wc->bOverflown = TRUE;
356 TRACE("Split point is: %s|%s\n", debugstr_run( &piter->member.run ), debugstr_run( &pp->member.run ));
359 wc->pt = piter->member.run.pt;
364 static ME_DisplayItem *ME_SplitByBacktracking(ME_WrapContext *wc, ME_DisplayItem *p, int loc)
366 ME_DisplayItem *piter = p, *pp;
368 ME_Run *run = &p->member.run;
370 idesp = i = find_split_point( wc->context, loc, run );
375 /* don't split words */
376 i = reverse_find_whitespace( get_text( run, 0 ), i );
377 pp = ME_MaximizeSplit(wc, p, i);
381 TRACE("Must backtrack to split at: %s\n", debugstr_run( &p->member.run ));
382 if (wc->pLastSplittableRun)
384 if (wc->pLastSplittableRun->member.run.nFlags & (MERF_GRAPHICS|MERF_TAB))
386 wc->pt = wc->pLastSplittableRun->member.run.pt;
387 return wc->pLastSplittableRun;
389 else if (wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE)
391 /* the following two lines are just to check if we forgot to call UpdateRunFlags earlier,
392 they serve no other purpose */
393 ME_UpdateRunFlags(wc->context->editor, run);
394 assert((wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE));
396 piter = wc->pLastSplittableRun;
397 run = &piter->member.run;
399 /* don't split words */
400 i = reverse_find_whitespace( get_text( run, 0 ), len );
402 i = reverse_find_non_whitespace( get_text( run, 0 ), len );
404 ME_DisplayItem *piter2 = split_run_extents(wc, piter, i);
405 wc->pt = piter2->member.run.pt;
408 /* splittable = must have whitespaces */
409 assert(0 == "Splittable, but no whitespaces");
413 /* restart from the first run beginning with spaces */
414 wc->pt = wc->pLastSplittableRun->member.run.pt;
415 return wc->pLastSplittableRun;
418 TRACE("Backtracking failed, trying desperate: %s\n", debugstr_run( &p->member.run ));
419 /* OK, no better idea, so assume we MAY split words if we can split at all*/
421 return split_run_extents(wc, piter, idesp);
423 if (wc->pRowStart && piter != wc->pRowStart)
425 /* don't need to break current run, because it's possible to split
427 wc->bOverflown = TRUE;
432 /* split point inside first character - no choice but split after that char */
434 /* the run is more than 1 char, so we may split */
435 return split_run_extents(wc, piter, 1);
437 /* the run is one char, can't split it */
442 static ME_DisplayItem *ME_WrapHandleRun(ME_WrapContext *wc, ME_DisplayItem *p)
448 assert(p->type == diRun);
451 run = &p->member.run;
452 run->pt.x = wc->pt.x;
453 run->pt.y = wc->pt.y;
454 ME_WrapSizeRun(wc, p);
457 if (wc->bOverflown) /* just skipping final whitespaces */
459 /* End paragraph run can't overflow to the next line by itself. */
460 if (run->nFlags & MERF_ENDPARA)
463 if (run->nFlags & MERF_WHITESPACE) {
464 wc->pt.x += run->nWidth;
465 /* skip runs consisting of only whitespaces */
469 if (run->nFlags & MERF_STARTWHITE) {
470 /* try to split the run at the first non-white char */
472 black = find_non_whitespace( get_text( run, 0 ), run->len, 0 );
474 wc->bOverflown = FALSE;
475 pp = split_run_extents(wc, p, black);
476 calc_run_extent(wc->context, &wc->pPara->member.para,
477 wc->nRow ? wc->nLeftMargin : wc->nFirstMargin,
479 ME_InsertRowStart(wc, pp);
483 /* black run: the row goes from pRowStart to the previous run */
484 ME_InsertRowStart(wc, p);
487 /* simply end the current row and move on to next one */
488 if (run->nFlags & MERF_ENDROW)
491 ME_InsertRowStart(wc, p);
495 /* will current run fit? */
497 wc->pt.x + run->nWidth - wc->context->pt.x > wc->nAvailWidth)
499 int loc = wc->context->pt.x + wc->nAvailWidth - wc->pt.x;
500 /* total white run ? */
501 if (run->nFlags & MERF_WHITESPACE) {
502 /* let the overflow logic handle it */
503 wc->bOverflown = TRUE;
506 /* TAB: we can split before */
507 if (run->nFlags & MERF_TAB) {
508 wc->bOverflown = TRUE;
509 if (wc->pRowStart == p)
510 /* Don't split before the start of the run, or we will get an
516 /* graphics: we can split before, if run's width is smaller than row's width */
517 if ((run->nFlags & MERF_GRAPHICS) && run->nWidth <= wc->nAvailWidth) {
518 wc->bOverflown = TRUE;
521 /* can we separate out the last spaces ? (to use overflow logic later) */
522 if (run->nFlags & MERF_ENDWHITE)
524 /* we aren't sure if it's *really* necessary, it's a good start however */
525 int black = reverse_find_non_whitespace( get_text( run, 0 ), len );
526 split_run_extents(wc, p, black);
527 /* handle both parts again */
530 /* determine the split point by backtracking */
531 pp = ME_SplitByBacktracking(wc, p, loc);
532 if (pp == wc->pRowStart)
534 if (run->nFlags & MERF_STARTWHITE)
536 /* We had only spaces so far, so we must be on the first line of the
537 * paragraph (or the first line after MERF_ENDROW forced the line
538 * break within the paragraph), since no other lines of the paragraph
539 * start with spaces. */
541 /* The lines will only contain spaces, and the rest of the run will
542 * overflow onto the next line. */
543 wc->bOverflown = TRUE;
546 /* Couldn't split the first run, possible because we have a large font
547 * with a single character that caused an overflow.
549 wc->pt.x += run->nWidth;
552 if (p != pp) /* found a suitable split point */
554 wc->bOverflown = TRUE;
557 /* we detected that it's best to split on start of this run */
561 /* not found anything - writing over margins is the only option left */
563 if ((run->nFlags & (MERF_SPLITTABLE | MERF_STARTWHITE))
564 || ((run->nFlags & (MERF_GRAPHICS|MERF_TAB)) && (p != wc->pRowStart)))
566 wc->pLastSplittableRun = p;
568 wc->pt.x += run->nWidth;
572 static int ME_GetParaLineSpace(ME_Context* c, ME_Paragraph* para)
575 if (!(para->pFmt->dwMask & PFM_LINESPACING)) return 0;
577 /* FIXME: how to compute simply the line space in ls ??? */
578 /* FIXME: does line spacing include the line itself ??? */
579 switch (para->pFmt->bLineSpacingRule)
581 case 0: sp = ls; break;
582 case 1: sp = (3 * ls) / 2; break;
583 case 2: sp = 2 * ls; break;
584 case 3: sp = ME_twips2pointsY(c, para->pFmt->dyLineSpacing); if (sp < ls) sp = ls; break;
585 case 4: sp = ME_twips2pointsY(c, para->pFmt->dyLineSpacing); break;
586 case 5: sp = para->pFmt->dyLineSpacing / 20; break;
587 default: FIXME("Unsupported spacing rule value %d\n", para->pFmt->bLineSpacingRule);
589 if (c->editor->nZoomNumerator == 0)
592 return sp * c->editor->nZoomNumerator / c->editor->nZoomDenominator;
595 static void ME_PrepareParagraphForWrapping(ME_Context *c, ME_DisplayItem *tp) {
598 tp->member.para.nWidth = 0;
599 /* remove row start items as they will be reinserted by the
600 * paragraph wrapper anyway */
601 tp->member.para.nRows = 0;
602 for (p = tp->next; p != tp->member.para.next_para; p = p->next) {
603 if (p->type == diStartRow) {
604 ME_DisplayItem *pRow = p;
607 ME_DestroyDisplayItem(pRow);
610 /* join runs that can be joined */
611 for (p = tp->next; p != tp->member.para.next_para; p = p->next) {
612 assert(p->type != diStartRow); /* should have been deleted above */
613 if (p->type == diRun) {
614 while (p->next->type == diRun && /* FIXME */
615 ME_CanJoinRuns(&p->member.run, &p->next->member.run)) {
616 ME_JoinRuns(c->editor, p);
622 static void ME_WrapTextParagraph(ME_Context *c, ME_DisplayItem *tp) {
629 assert(tp->type == diParagraph);
630 if (!(tp->member.para.nFlags & MEPF_REWRAP)) {
633 ME_PrepareParagraphForWrapping(c, tp);
634 pFmt = tp->member.para.pFmt;
638 /* wc.para_style = tp->member.para.style; */
640 if (tp->member.para.nFlags & MEPF_ROWEND) {
641 wc.nFirstMargin = wc.nLeftMargin = wc.nRightMargin = 0;
643 int dxStartIndent = pFmt->dxStartIndent;
644 if (tp->member.para.pCell) {
645 dxStartIndent += ME_GetTableRowEnd(tp)->member.para.pFmt->dxOffset;
647 wc.nFirstMargin = ME_twips2pointsX(c, dxStartIndent);
648 wc.nLeftMargin = wc.nFirstMargin + ME_twips2pointsX(c, pFmt->dxOffset);
649 wc.nRightMargin = ME_twips2pointsX(c, pFmt->dxRightIndent);
651 if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
652 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
654 wc.nFirstMargin += ME_twips2pointsX(c, pFmt->dxOffset * 2);
658 if (pFmt->dwMask & PFM_SPACEBEFORE)
659 wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceBefore);
660 if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
661 pFmt->dwMask & PFM_BORDER)
663 border = ME_GetParaBorderWidth(c, tp->member.para.pFmt->wBorders);
664 if (pFmt->wBorders & 1) {
665 wc.nFirstMargin += border;
666 wc.nLeftMargin += border;
668 if (pFmt->wBorders & 2)
669 wc.nRightMargin -= border;
670 if (pFmt->wBorders & 4)
674 linespace = ME_GetParaLineSpace(c, &tp->member.para);
677 for (p = tp->next; p!=tp->member.para.next_para; ) {
678 assert(p->type != diStartRow);
679 if (p->type == diRun) {
680 p = ME_WrapHandleRun(&wc, p);
683 if (wc.nRow && p == wc.pRowStart)
684 wc.pt.y += linespace;
686 ME_WrapEndParagraph(&wc, p);
687 if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
688 (pFmt->dwMask & PFM_BORDER) && (pFmt->wBorders & 8))
690 if (tp->member.para.pFmt->dwMask & PFM_SPACEAFTER)
691 wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceAfter);
693 tp->member.para.nFlags &= ~MEPF_REWRAP;
694 tp->member.para.nHeight = wc.pt.y;
695 tp->member.para.nRows = wc.nRow;
698 static void ME_MarkRepaintEnd(ME_DisplayItem *para,
699 ME_DisplayItem **repaint_start,
700 ME_DisplayItem **repaint_end)
703 *repaint_start = para;
707 BOOL ME_WrapMarkedParagraphs(ME_TextEditor *editor)
709 ME_DisplayItem *item;
712 ME_DisplayItem *repaint_start = NULL, *repaint_end = NULL;
714 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
716 item = editor->pBuffer->pFirst->next;
717 while(item != editor->pBuffer->pLast) {
718 BOOL bRedraw = FALSE;
720 assert(item->type == diParagraph);
721 if ((item->member.para.nFlags & MEPF_REWRAP)
722 || (item->member.para.pt.y != c.pt.y))
724 item->member.para.pt = c.pt;
726 ME_WrapTextParagraph(&c, item);
729 ME_MarkRepaintEnd(item, &repaint_start, &repaint_end);
731 if (item->member.para.nFlags & MEPF_ROWSTART)
733 ME_DisplayItem *cell = ME_FindItemFwd(item, diCell);
734 ME_DisplayItem *endRowPara;
736 cell->member.cell.pt = c.pt;
737 /* Offset the text by the largest top border width. */
738 while (cell->member.cell.next_cell) {
739 borderWidth = max(borderWidth, cell->member.cell.border.top.width);
740 cell = cell->member.cell.next_cell;
742 endRowPara = ME_FindItemFwd(cell, diParagraph);
743 assert(endRowPara->member.para.nFlags & MEPF_ROWEND);
746 borderWidth = max(ME_twips2pointsY(&c, borderWidth), 1);
748 cell->member.cell.yTextOffset = borderWidth;
749 cell = cell->member.cell.prev_cell;
751 c.pt.y += borderWidth;
753 if (endRowPara->member.para.pFmt->dxStartIndent > 0)
755 int dxStartIndent = endRowPara->member.para.pFmt->dxStartIndent;
756 cell = ME_FindItemFwd(item, diCell);
757 cell->member.cell.pt.x += ME_twips2pointsX(&c, dxStartIndent);
758 c.pt.x = cell->member.cell.pt.x;
761 else if (item->member.para.nFlags & MEPF_ROWEND)
763 /* Set all the cells to the height of the largest cell */
764 ME_DisplayItem *startRowPara;
765 int prevHeight, nHeight, bottomBorder = 0;
766 ME_DisplayItem *cell = ME_FindItemBack(item, diCell);
767 item->member.para.nWidth = cell->member.cell.pt.x + cell->member.cell.nWidth;
768 if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWSTART))
770 /* Last row, the bottom border is added to the height. */
771 cell = cell->member.cell.prev_cell;
774 bottomBorder = max(bottomBorder, cell->member.cell.border.bottom.width);
775 cell = cell->member.cell.prev_cell;
777 bottomBorder = ME_twips2pointsY(&c, bottomBorder);
778 cell = ME_FindItemBack(item, diCell);
780 prevHeight = cell->member.cell.nHeight;
781 nHeight = cell->member.cell.prev_cell->member.cell.nHeight + bottomBorder;
782 cell->member.cell.nHeight = nHeight;
783 item->member.para.nHeight = nHeight;
784 cell = cell->member.cell.prev_cell;
785 cell->member.cell.nHeight = nHeight;
786 while (cell->member.cell.prev_cell)
788 cell = cell->member.cell.prev_cell;
789 cell->member.cell.nHeight = nHeight;
791 /* Also set the height of the start row paragraph */
792 startRowPara = ME_FindItemBack(cell, diParagraph);
793 startRowPara->member.para.nHeight = nHeight;
794 c.pt.x = startRowPara->member.para.pt.x;
795 c.pt.y = cell->member.cell.pt.y + nHeight;
796 if (prevHeight < nHeight)
798 /* The height of the cells has grown, so invalidate the bottom of
800 ME_MarkRepaintEnd(item, &repaint_start, &repaint_end);
801 cell = ME_FindItemBack(item, diCell);
803 ME_MarkRepaintEnd(ME_FindItemBack(cell, diParagraph), &repaint_start, &repaint_end);
804 cell = cell->member.cell.prev_cell;
808 else if (item->member.para.pCell &&
809 item->member.para.pCell != item->member.para.next_para->member.para.pCell)
811 /* The next paragraph is in the next cell in the table row. */
812 ME_Cell *cell = &item->member.para.pCell->member.cell;
813 cell->nHeight = c.pt.y + item->member.para.nHeight - cell->pt.y;
815 /* Propagate the largest height to the end so that it can be easily
816 * sent back to all the cells at the end of the row. */
818 cell->nHeight = max(cell->nHeight, cell->prev_cell->member.cell.nHeight);
820 c.pt.x = cell->pt.x + cell->nWidth;
822 cell->next_cell->member.cell.pt = c.pt;
823 if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWEND))
824 c.pt.y += cell->yTextOffset;
828 if (item->member.para.pCell) {
829 /* Next paragraph in the same cell. */
830 c.pt.x = item->member.para.pCell->member.cell.pt.x;
832 /* Normal paragraph */
835 c.pt.y += item->member.para.nHeight;
838 totalWidth = max(totalWidth, item->member.para.nWidth);
839 item = item->member.para.next_para;
841 editor->sizeWindow.cx = c.rcView.right-c.rcView.left;
842 editor->sizeWindow.cy = c.rcView.bottom-c.rcView.top;
844 editor->nTotalLength = c.pt.y;
845 editor->nTotalWidth = totalWidth;
846 editor->pBuffer->pLast->member.para.pt.x = 0;
847 editor->pBuffer->pLast->member.para.pt.y = c.pt.y;
849 ME_DestroyContext(&c);
851 if (repaint_start || editor->nTotalLength < editor->nLastTotalLength)
852 ME_InvalidateParagraphRange(editor, repaint_start, repaint_end);
853 return !!repaint_start;
856 void ME_InvalidateParagraphRange(ME_TextEditor *editor,
857 ME_DisplayItem *start_para,
858 ME_DisplayItem *last_para)
864 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
866 ofs = editor->vert_si.nPos;
869 start_para = ME_GetOuterParagraph(start_para);
870 last_para = ME_GetOuterParagraph(last_para);
871 rc.top = c.rcView.top + start_para->member.para.pt.y - ofs;
873 rc.top = c.rcView.top + editor->nTotalLength - ofs;
875 if (editor->nTotalLength < editor->nLastTotalLength)
876 rc.bottom = c.rcView.top + editor->nLastTotalLength - ofs;
878 rc.bottom = c.rcView.top + last_para->member.para.pt.y + last_para->member.para.nHeight - ofs;
879 ITextHost_TxInvalidateRect(editor->texthost, &rc, TRUE);
881 ME_DestroyContext(&c);
886 ME_SendRequestResize(ME_TextEditor *editor, BOOL force)
888 if (editor->nEventMask & ENM_REQUESTRESIZE)
892 ITextHost_TxGetClientRect(editor->texthost, &rc);
894 if (force || rc.bottom != editor->nTotalLength)
898 info.nmhdr.hwndFrom = NULL;
899 info.nmhdr.idFrom = 0;
900 info.nmhdr.code = EN_REQUESTRESIZE;
902 info.rc.right = editor->nTotalWidth;
903 info.rc.bottom = editor->nTotalLength;
905 editor->nEventMask &= ~ENM_REQUESTRESIZE;
906 ITextHost_TxNotify(editor->texthost, info.nmhdr.code, &info);
907 editor->nEventMask |= ENM_REQUESTRESIZE;