2 * RichEdit - operations on runs (diRun, rectangular pieces of paragraphs).
3 * Splitting/joining runs. Adjusting offsets after deleting/adding content.
4 * Character/pixel conversions.
6 * Copyright 2004 by Krzysztof Foltman
7 * Copyright 2006 by Phil Krylov
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
26 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
27 WINE_DECLARE_DEBUG_CHANNEL(richedit_check);
28 WINE_DECLARE_DEBUG_CHANNEL(richedit_lists);
30 /******************************************************************************
33 * Returns 1 if two runs can be safely merged into one, 0 otherwise.
35 int ME_CanJoinRuns(const ME_Run *run1, const ME_Run *run2)
37 if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
39 if (run1->style != run2->style)
41 if ((run1->nFlags & MERF_STYLEFLAGS) != (run2->nFlags & MERF_STYLEFLAGS))
46 void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift)
48 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
50 ME_PropagateCharOffset(p, shift);
53 /******************************************************************************
54 * ME_PropagateCharOffsets
56 * Shifts (increases or decreases) character offset (relative to beginning of
57 * the document) of the part of the text starting from given place.
59 void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
61 /* Runs in one paragraph contain character offset relative to their owning
62 * paragraph. If we start the shifting from the run, we need to shift
63 * all the relative offsets until the end of the paragraph
65 if (p->type == diRun) /* propagate in all runs in this para */
67 TRACE("PropagateCharOffset(%s, %d)\n", debugstr_w(p->member.run.strText->szData), shift);
69 p->member.run.nCharOfs += shift;
70 assert(p->member.run.nCharOfs >= 0);
71 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
72 } while(p->type == diRun);
74 /* Runs in next paragraphs don't need their offsets updated, because they,
75 * again, those offsets are relative to their respective paragraphs.
76 * Instead of that, we're updating paragraphs' character offsets.
78 if (p->type == diParagraph) /* propagate in all next paras */
81 p->member.para.nCharOfs += shift;
82 assert(p->member.para.nCharOfs >= 0);
83 p = p->member.para.next_para;
84 } while(p->type == diParagraph);
86 /* diTextEnd also has character offset in it, which makes finding text length
87 * easier. But it needs to be up to date first.
89 if (p->type == diTextEnd)
91 p->member.para.nCharOfs += shift;
92 assert(p->member.para.nCharOfs >= 0);
96 /******************************************************************************
99 * Checks if editor lists' validity and optionally dumps the document structure
101 void ME_CheckCharOffsets(ME_TextEditor *editor)
103 ME_DisplayItem *p = editor->pBuffer->pFirst;
104 int ofs = 0, ofsp = 0;
105 if(TRACE_ON(richedit_lists))
107 TRACE_(richedit_lists)("---\n");
108 ME_DumpDocument(editor->pBuffer);
111 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
114 TRACE_(richedit_check)("tend, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
115 assert(ofsp+ofs == p->member.para.nCharOfs);
118 TRACE_(richedit_check)("para, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
119 assert(ofsp+ofs == p->member.para.nCharOfs);
120 ofsp = p->member.para.nCharOfs;
124 TRACE_(richedit_check)("run, real ofs = %d (+ofsp = %d), counted = %d, len = %d, txt = \"%s\", flags=%08x, fx&mask = %08x\n",
125 p->member.run.nCharOfs, p->member.run.nCharOfs+ofsp, ofsp+ofs,
126 p->member.run.strText->nLen, debugstr_w(p->member.run.strText->szData),
127 p->member.run.nFlags,
128 p->member.run.style->fmt.dwMask & p->member.run.style->fmt.dwEffects);
129 assert(ofs == p->member.run.nCharOfs);
130 assert(p->member.run.strText->nLen);
131 ofs += p->member.run.strText->nLen;
134 TRACE_(richedit_check)("cell\n");
142 /******************************************************************************
143 * ME_CharOfsFromRunOfs
145 * Converts a character position relative to the start of the run, to a
146 * character position relative to the start of the document.
147 * Kind of a "local to global" offset conversion.
149 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara,
150 const ME_DisplayItem *pRun, int nOfs)
152 assert(pRun && pRun->type == diRun);
153 assert(pPara && pPara->type == diParagraph);
154 return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs + nOfs;
157 /******************************************************************************
158 * ME_CursorFromCharOfs
160 * Converts a character offset (relative to the start of the document) to
161 * a cursor structure (which contains a run and a position relative to that
164 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
166 ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pPara,
167 &pCursor->pRun, &pCursor->nOffset);
170 /******************************************************************************
171 * ME_RunOfsFromCharOfs
173 * Find a run and relative character offset given an absolute character offset
174 * (absolute offset being an offset relative to the start of the document).
175 * Kind of a "global to local" offset conversion.
177 void ME_RunOfsFromCharOfs(ME_TextEditor *editor,
179 ME_DisplayItem **ppPara,
180 ME_DisplayItem **ppRun,
183 ME_DisplayItem *item, *next_item;
185 nCharOfs = max(nCharOfs, 0);
186 nCharOfs = min(nCharOfs, ME_GetTextLength(editor));
188 /* Find the paragraph at the offset. */
189 next_item = editor->pBuffer->pFirst->member.para.next_para;
192 next_item = item->member.para.next_para;
193 } while (next_item->member.para.nCharOfs <= nCharOfs);
194 assert(item->type == diParagraph);
195 nCharOfs -= item->member.para.nCharOfs;
196 if (ppPara) *ppPara = item;
198 /* Find the run at the offset. */
199 next_item = ME_FindItemFwd(item, diRun);
202 next_item = ME_FindItemFwd(item, diRunOrParagraphOrEnd);
203 } while (next_item->type == diRun &&
204 next_item->member.run.nCharOfs <= nCharOfs);
205 assert(item->type == diRun);
206 nCharOfs -= item->member.run.nCharOfs;
208 if (ppRun) *ppRun = item;
209 if (pOfs) *pOfs = nCharOfs;
212 /******************************************************************************
215 * Merges two adjacent runs, the one given as a parameter and the next one.
217 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
219 ME_DisplayItem *pNext = p->next;
221 assert(p->type == diRun && pNext->type == diRun);
222 assert(p->member.run.nCharOfs != -1);
223 ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
225 /* Update all cursors so that they don't contain the soon deleted run */
226 for (i=0; i<editor->nCursors; i++) {
227 if (editor->pCursors[i].pRun == pNext) {
228 editor->pCursors[i].pRun = p;
229 editor->pCursors[i].nOffset += p->member.run.strText->nLen;
233 ME_AppendString(p->member.run.strText, pNext->member.run.strText);
235 ME_DestroyDisplayItem(pNext);
236 ME_UpdateRunFlags(editor, &p->member.run);
237 if(TRACE_ON(richedit))
239 TRACE("Before check after join\n");
240 ME_CheckCharOffsets(editor);
241 TRACE("After check after join\n");
245 /******************************************************************************
248 * Splits a run into two in a given place. It also updates the screen position
249 * and size (extent) of the newly generated runs.
251 ME_DisplayItem *ME_SplitRun(ME_WrapContext *wc, ME_DisplayItem *item, int nVChar)
253 ME_TextEditor *editor = wc->context->editor;
254 ME_DisplayItem *item2 = NULL;
256 ME_Paragraph *para = &ME_GetParagraph(item)->member.para;
258 assert(item->member.run.nCharOfs != -1);
259 if(TRACE_ON(richedit))
261 TRACE("Before check before split\n");
262 ME_CheckCharOffsets(editor);
263 TRACE("After check before split\n");
266 run = &item->member.run;
268 TRACE("Before split: %s(%d, %d)\n", debugstr_w(run->strText->szData),
269 run->pt.x, run->pt.y);
271 item2 = ME_SplitRunSimple(editor, item, nVChar);
273 run2 = &item2->member.run;
275 ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run);
276 ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run2);
278 run2->pt.x = run->pt.x+run->nWidth;
279 run2->pt.y = run->pt.y;
281 if(TRACE_ON(richedit))
283 TRACE("Before check after split\n");
284 ME_CheckCharOffsets(editor);
285 TRACE("After check after split\n");
286 TRACE("After split: %s(%d, %d), %s(%d, %d)\n",
287 debugstr_w(run->strText->szData), run->pt.x, run->pt.y,
288 debugstr_w(run2->strText->szData), run2->pt.x, run2->pt.y);
294 /******************************************************************************
297 * Does the most basic job of splitting a run into two - it does not
298 * update the positions and extents.
300 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, int nVChar)
302 ME_Run *run = &item->member.run;
303 ME_DisplayItem *item2;
306 assert(nVChar > 0 && nVChar < run->strText->nLen);
307 assert(item->type == diRun);
308 assert(!(item->member.run.nFlags & MERF_NONTEXT));
309 assert(item->member.run.nCharOfs != -1);
311 item2 = ME_MakeRun(run->style,
312 ME_VSplitString(run->strText, nVChar), run->nFlags&MERF_SPLITMASK);
314 item2->member.run.nCharOfs = item->member.run.nCharOfs + nVChar;
316 run2 = &item2->member.run;
317 ME_InsertBefore(item->next, item2);
319 ME_UpdateRunFlags(editor, run);
320 ME_UpdateRunFlags(editor, run2);
321 for (i=0; i<editor->nCursors; i++) {
322 if (editor->pCursors[i].pRun == item &&
323 editor->pCursors[i].nOffset >= nVChar) {
324 assert(item2->type == diRun);
325 editor->pCursors[i].pRun = item2;
326 editor->pCursors[i].nOffset -= nVChar;
329 ME_GetParagraph(item)->member.para.nFlags |= MEPF_REWRAP;
333 /******************************************************************************
336 * A helper function to create run structures quickly.
338 ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
340 ME_DisplayItem *item = ME_MakeDI(diRun);
341 item->member.run.style = s;
342 item->member.run.ole_obj = NULL;
343 item->member.run.strText = strData;
344 item->member.run.nFlags = nFlags;
345 item->member.run.nCharOfs = -1;
350 /******************************************************************************
351 * ME_InsertRunAtCursor
353 * Inserts a new run with given style, flags and content at a given position,
354 * which is passed as a cursor structure (which consists of a run and
355 * a run-relative character offset).
358 ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
359 const WCHAR *str, int len, int flags)
364 if (cursor->nOffset) {
365 /* We're inserting at the middle of the existing run, which means that
366 * that run must be split. It isn't always necessary, but */
367 cursor->pRun = ME_SplitRunSimple(editor, cursor->pRun, cursor->nOffset);
371 pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
373 pUI->nStart = cursor->pPara->member.para.nCharOfs
374 + cursor->pRun->member.run.nCharOfs;
378 pDI = ME_MakeRun(style, ME_MakeStringN(str, len), flags);
379 pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
380 ME_InsertBefore(cursor->pRun, pDI);
381 TRACE("Shift length:%d\n", len);
382 ME_PropagateCharOffset(cursor->pRun, len);
383 cursor->pPara->member.para.nFlags |= MEPF_REWRAP;
387 /******************************************************************************
390 * Determine some of run attributes given its content (style, text content).
391 * Some flags cannot be determined by this function (MERF_GRAPHICS,
394 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
396 ME_String *strText = run->strText;
397 assert(run->nCharOfs >= 0);
399 if (RUN_IS_HIDDEN(run) || run->nFlags & MERF_TABLESTART)
400 run->nFlags |= MERF_HIDDEN;
402 run->nFlags &= ~MERF_HIDDEN;
404 if (ME_IsSplitable(strText))
405 run->nFlags |= MERF_SPLITTABLE;
407 run->nFlags &= ~MERF_SPLITTABLE;
409 if (!(run->nFlags & MERF_NOTEXT)) {
410 if (ME_IsWhitespaces(strText))
411 run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
414 run->nFlags &= ~MERF_WHITESPACE;
416 if (ME_IsWSpace(strText->szData[0]))
417 run->nFlags |= MERF_STARTWHITE;
419 run->nFlags &= ~MERF_STARTWHITE;
421 if (ME_IsWSpace(strText->szData[strText->nLen - 1]))
422 run->nFlags |= MERF_ENDWHITE;
424 run->nFlags &= ~MERF_ENDWHITE;
428 run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
431 /******************************************************************************
434 * Returns a character position inside the run given a run-relative
435 * pixel horizontal position. This version rounds left (ie. if the second
436 * character is at pixel position 8, then for cx=0..7 it returns 0).
438 int ME_CharFromPoint(ME_Context *c, int cx, ME_Run *run)
443 if (!run->strText->nLen)
446 if (run->nFlags & MERF_TAB ||
447 (run->nFlags & (MERF_ENDCELL|MERF_ENDPARA)) == MERF_ENDCELL)
449 if (cx < run->nWidth/2)
453 if (run->nFlags & MERF_GRAPHICS)
456 ME_GetOLEObjectSize(c, run, &sz);
461 hOldFont = ME_SelectStyleFont(c, run->style);
463 if (c->editor->cPasswordMask)
465 ME_String *strMasked = ME_MakeStringR(c->editor->cPasswordMask, run->strText->nLen);
466 GetTextExtentExPointW(c->hDC, strMasked->szData, run->strText->nLen,
467 cx, &fit, NULL, &sz);
468 ME_DestroyString(strMasked);
472 GetTextExtentExPointW(c->hDC, run->strText->szData, run->strText->nLen,
473 cx, &fit, NULL, &sz);
476 ME_UnselectStyleFont(c, run->style, hOldFont);
481 /******************************************************************************
482 * ME_CharFromPointCursor
484 * Returns a character position inside the run given a run-relative
485 * pixel horizontal position. This version rounds to the nearest character edge
486 * (ie. if the second character is at pixel position 8, then for cx=0..3
487 * it returns 0, and for cx=4..7 it returns 1).
489 * It is used for mouse click handling, for better usability (and compatibility
490 * with the native control).
492 int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
494 ME_String *strRunText;
495 /* This could point to either the run's real text, or it's masked form in a password control */
501 if (!run->strText->nLen)
504 if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
506 if (cx < run->nWidth/2)
510 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
511 if (run->nFlags & MERF_GRAPHICS)
514 ME_GetOLEObjectSize(&c, run, &sz);
515 ME_DestroyContext(&c);
521 if (editor->cPasswordMask)
522 strRunText = ME_MakeStringR(editor->cPasswordMask, run->strText->nLen);
524 strRunText = run->strText;
526 hOldFont = ME_SelectStyleFont(&c, run->style);
527 GetTextExtentExPointW(c.hDC, strRunText->szData, strRunText->nLen,
528 cx, &fit, NULL, &sz);
529 if (fit != strRunText->nLen)
531 GetTextExtentPoint32W(c.hDC, strRunText->szData, fit, &sz2);
532 GetTextExtentPoint32W(c.hDC, strRunText->szData, fit + 1, &sz3);
533 if (cx >= (sz2.cx+sz3.cx)/2)
537 if (editor->cPasswordMask)
538 ME_DestroyString(strRunText);
540 ME_UnselectStyleFont(&c, run->style, hOldFont);
541 ME_DestroyContext(&c);
545 /******************************************************************************
548 * Finds a width and a height of the text using a specified style
550 static void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s, SIZE *size)
553 hOldFont = ME_SelectStyleFont(c, s);
554 GetTextExtentPoint32W(c->hDC, szText, nChars, size);
555 ME_UnselectStyleFont(c, s, hOldFont);
558 /******************************************************************************
561 * Returns a run-relative pixel position given a run-relative character
562 * position (character offset)
564 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
568 ME_String *strRunText;
569 /* This could point to either the run's real text, or it's masked form in a password control */
571 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
572 if (pRun->nFlags & MERF_GRAPHICS)
575 ME_GetOLEObjectSize(&c, pRun, &size);
576 ME_DestroyContext(&c);
578 } else if (pRun->nFlags & MERF_ENDPARA) {
582 if (editor->cPasswordMask)
583 strRunText = ME_MakeStringR(editor->cPasswordMask, pRun->strText->nLen);
585 strRunText = pRun->strText;
587 ME_GetTextExtent(&c, strRunText->szData, nOffset, pRun->style, &size);
588 ME_DestroyContext(&c);
589 if (editor->cPasswordMask)
590 ME_DestroyString(strRunText);
594 /******************************************************************************
595 * ME_GetRunSizeCommon
597 * Finds width, height, ascent and descent of a run, up to given character
600 static SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
601 int startx, int *pAscent, int *pDescent)
604 int nMaxLen = run->strText->nLen;
609 /* FIXME the following call also ensures that TEXTMETRIC structure is filled
610 * this is wasteful for MERF_NONTEXT runs, but that shouldn't matter
614 if (c->editor->cPasswordMask)
616 ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask,nLen);
617 ME_GetTextExtent(c, szMasked->szData, nLen,run->style, &size);
618 ME_DestroyString(szMasked);
622 ME_GetTextExtent(c, run->strText->szData, nLen, run->style, &size);
624 *pAscent = run->style->tm.tmAscent;
625 *pDescent = run->style->tm.tmDescent;
626 size.cy = *pAscent + *pDescent;
628 if (run->nFlags & MERF_TAB)
630 int pos = 0, i = 0, ppos, shift = 0;
631 PARAFORMAT2 *pFmt = para->pFmt;
633 if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
634 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
635 /* The horizontal gap shifts the tab positions to leave the gap. */
636 shift = pFmt->dxOffset * 2;
638 if (i < pFmt->cTabCount)
640 /* Only one side of the horizontal gap is needed at the end of
642 if (i == pFmt->cTabCount -1)
644 pos = shift + (pFmt->rgxTabs[i]&0x00FFFFFF);
649 pos += lDefaultTab - (pos % lDefaultTab);
651 ppos = ME_twips2pointsX(c, pos);
652 if (ppos > startx + run->pt.x) {
653 size.cx = ppos - startx - run->pt.x;
657 size.cy = *pAscent + *pDescent;
660 if (run->nFlags & MERF_GRAPHICS)
662 ME_GetOLEObjectSize(c, run, &size);
663 if (size.cy > *pAscent)
665 /* descent is unchanged */
671 /******************************************************************************
674 * Finds width and height (but not ascent and descent) of a part of the run
675 * up to given character.
677 SIZE ME_GetRunSize(ME_Context *c, const ME_Paragraph *para,
678 ME_Run *run, int nLen, int startx)
681 return ME_GetRunSizeCommon(c, para, run, nLen, startx, &asc, &desc);
684 /******************************************************************************
687 * Updates the size of the run (fills width, ascent and descent). The height
688 * is calculated based on whole row's ascent and descent anyway, so no need
691 void ME_CalcRunExtent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run)
693 if (run->nFlags & MERF_HIDDEN)
697 int nEnd = run->strText->nLen;
698 SIZE size = ME_GetRunSizeCommon(c, para, run, nEnd, startx,
699 &run->nAscent, &run->nDescent);
700 run->nWidth = size.cx;
702 WARN("size.cx == 0\n");
706 /******************************************************************************
707 * ME_SetSelectionCharFormat
709 * Applies a style change, either to a current selection, or to insert cursor
710 * (ie. the style next typed characters will use).
712 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
714 if (!ME_IsSelection(editor))
717 if (!editor->pBuffer->pCharStyle)
718 editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
719 s = ME_ApplyStyle(editor->pBuffer->pCharStyle, pFmt);
720 ME_ReleaseStyle(editor->pBuffer->pCharStyle);
721 editor->pBuffer->pCharStyle = s;
723 ME_Cursor *from, *to;
724 ME_GetSelection(editor, &from, &to);
725 ME_SetCharFormat(editor, from, to, pFmt);
729 /******************************************************************************
732 * Applies a style change to the specified part of the text
734 * The start and end cursors specify the part of the text. These cursors will
735 * be updated to stay valid, but this function may invalidate other
736 * non-selection cursors. The end cursor may be NULL to specify all the text
737 * following the start cursor.
739 * If no text is selected, then nothing is done.
741 void ME_SetCharFormat(ME_TextEditor *editor, ME_Cursor *start, ME_Cursor *end, CHARFORMAT2W *pFmt)
743 ME_DisplayItem *para;
745 ME_DisplayItem *end_run = NULL;
747 if (end && start->pRun == end->pRun && start->nOffset == end->nOffset)
752 /* SplitRunSimple may or may not update the cursors, depending on whether they
753 * are selection cursors, but we need to make sure they are valid. */
754 ME_DisplayItem *split_run = start->pRun;
755 int split_offset = start->nOffset;
756 start->pRun = ME_SplitRunSimple(editor, split_run, split_offset);
758 if (end && end->pRun == split_run)
760 end->pRun = start->pRun;
761 end->nOffset -= split_offset;
765 if (end && end->nOffset)
767 end_run = end->pRun = ME_SplitRunSimple(editor, end->pRun, end->nOffset);
775 para->member.para.nFlags |= MEPF_REWRAP;
777 while(run != end_run)
779 ME_UndoItem *undo = NULL;
780 ME_Style *new_style = ME_ApplyStyle(run->member.run.style, pFmt);
781 /* ME_DumpStyle(new_style); */
782 undo = ME_AddUndoItem(editor, diUndoSetCharFormat, NULL);
784 undo->nStart = run->member.run.nCharOfs+para->member.para.nCharOfs;
785 undo->nLen = run->member.run.strText->nLen;
786 undo->di.member.ustyle = run->member.run.style;
787 /* we'd have to addref undo...ustyle and release tmp...style
788 but they'd cancel each other out so we can do nothing instead */
791 ME_ReleaseStyle(run->member.run.style);
792 run->member.run.style = new_style;
793 run = ME_FindItemFwd(run, diRunOrParagraph);
794 if (run && run->type == diParagraph)
797 run = ME_FindItemFwd(run, diRun);
799 para->member.para.nFlags |= MEPF_REWRAP;
804 /******************************************************************************
805 * ME_SetDefaultCharFormat
807 * Applies a style change to the default character style.
809 void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
813 assert(mod->cbSize == sizeof(CHARFORMAT2W));
814 style = ME_ApplyStyle(editor->pBuffer->pDefaultStyle, mod);
815 editor->pBuffer->pDefaultStyle->fmt = style->fmt;
816 editor->pBuffer->pDefaultStyle->tm = style->tm;
817 ME_ReleaseStyle(style);
818 ME_MarkAllForWrapping(editor);
819 /* pcf = editor->pBuffer->pDefaultStyle->fmt; */
822 static void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
824 ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
825 if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_CF1UNDERLINE))
827 pFmt->dwMask |= CFM_UNDERLINE;
828 pFmt->dwEffects |= CFE_UNDERLINE;
830 if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_UNDERLINENONE))
832 pFmt->dwMask |= CFM_UNDERLINE;
833 pFmt->dwEffects &= ~CFE_UNDERLINE;
837 /******************************************************************************
838 * ME_GetDefaultCharFormat
840 * Retrieves the current default character style (the one applied where no
841 * other style was applied) .
843 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
845 ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
848 /******************************************************************************
849 * ME_GetSelectionCharFormat
851 * If selection exists, it returns all style elements that are set consistently
852 * in the whole selection. If not, it just returns the current style.
854 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
856 ME_Cursor *from, *to;
857 if (!ME_IsSelection(editor) && editor->pBuffer->pCharStyle)
859 ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
862 ME_GetSelection(editor, &from, &to);
863 ME_GetCharFormat(editor, from, to, pFmt);
866 /******************************************************************************
869 * Returns the style consisting of those attributes which are consistently set
870 * in the whole character range.
872 void ME_GetCharFormat(ME_TextEditor *editor, const ME_Cursor *from,
873 const ME_Cursor *to, CHARFORMAT2W *pFmt)
875 ME_DisplayItem *run, *run_end;
879 /* special case - if selection is empty, take previous char's formatting */
880 if (from->pRun == to->pRun && from->nOffset == to->nOffset)
884 ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
885 if (tmp_run->type == diRun) {
886 ME_GetRunCharFormat(editor, tmp_run, pFmt);
890 ME_GetRunCharFormat(editor, run, pFmt);
896 run_end = ME_FindItemBack(run_end, diRun);
898 ME_GetRunCharFormat(editor, run, pFmt);
900 if (run == run_end) return;
903 /* FIXME add more style feature comparisons */
904 int nAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR | CFM_UNDERLINETYPE;
905 int nEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_PROTECTED | CFM_LINK | CFM_SUPERSCRIPT;
907 run = ME_FindItemFwd(run, diRun);
909 ZeroMemory(&tmp, sizeof(tmp));
910 tmp.cbSize = sizeof(tmp);
911 ME_GetRunCharFormat(editor, run, &tmp);
913 assert((tmp.dwMask & nAttribs) == nAttribs);
914 /* reset flags that differ */
916 if (pFmt->yHeight != tmp.yHeight)
917 pFmt->dwMask &= ~CFM_SIZE;
918 if (pFmt->dwMask & CFM_FACE)
920 if (!(tmp.dwMask & CFM_FACE))
921 pFmt->dwMask &= ~CFM_FACE;
922 else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName) ||
923 pFmt->bPitchAndFamily != tmp.bPitchAndFamily)
924 pFmt->dwMask &= ~CFM_FACE;
926 if (pFmt->yHeight != tmp.yHeight)
927 pFmt->dwMask &= ~CFM_SIZE;
928 if (pFmt->bUnderlineType != tmp.bUnderlineType)
929 pFmt->dwMask &= ~CFM_UNDERLINETYPE;
930 if (pFmt->dwMask & CFM_COLOR)
932 if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
934 if (pFmt->crTextColor != tmp.crTextColor)
935 pFmt->dwMask &= ~CFM_COLOR;
939 pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & nEffects);
940 pFmt->dwEffects = tmp.dwEffects;
942 } while(run != run_end);