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 if (p->member.run.nFlags & MERF_ENDPARA)
131 ofs += (editor->bEmulateVersion10 ? 2 : 1);
133 ofs += ME_StrLen(p->member.run.strText);
141 /******************************************************************************
142 * ME_CharOfsFromRunOfs
144 * Converts a character position relative to the start of the run, to a
145 * character position relative to the start of the document.
146 * Kind of a "local to global" offset conversion.
148 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, ME_DisplayItem *pRun, int nOfs)
150 ME_DisplayItem *pPara;
152 assert(pRun->type == diRun);
153 assert(pRun->member.run.nCharOfs != -1);
155 pPara = ME_FindItemBack(pRun, diParagraph);
157 assert(pPara->type==diParagraph);
158 return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs
159 + ME_VPosToPos(pRun->member.run.strText, nOfs);
162 /******************************************************************************
163 * ME_CursorFromCharOfs
165 * Converts a character offset (relative to the start of the document) to
166 * a cursor structure (which contains a run and a position relative to that
169 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
171 ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pRun, &pCursor->nOffset);
174 /******************************************************************************
175 * ME_RunOfsFromCharOfs
177 * Find a run and relative character offset given an absolute character offset
178 * (absolute offset being an offset relative to the start of the document).
179 * Kind of a "global to local" offset conversion.
181 void ME_RunOfsFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem **ppRun, int *pOfs)
183 ME_DisplayItem *pPara;
186 pPara = editor->pBuffer->pFirst->member.para.next_para;
190 while (pPara->type == diParagraph)
192 nParaOfs = pPara->member.para.nCharOfs;
193 assert(nCharOfs >= nParaOfs);
195 if (nCharOfs < pPara->member.para.next_para->member.para.nCharOfs)
198 *ppRun = ME_FindItemFwd(pPara, diRun);
200 while (!((*ppRun)->member.run.nFlags & MERF_ENDPARA))
202 ME_DisplayItem *pNext = ME_FindItemFwd(*ppRun, diRun);
204 assert(pNext->type == diRun);
205 if (nCharOfs < nParaOfs + pNext->member.run.nCharOfs) {
206 *pOfs = ME_PosToVPos((*ppRun)->member.run.strText,
207 nCharOfs - nParaOfs - (*ppRun)->member.run.nCharOfs);
212 /* the handling of bEmulateVersion10 may be a source of many bugs, I'm afraid */
213 eollen = (editor->bEmulateVersion10 ? 2 : 1);
214 if (nCharOfs >= nParaOfs + (*ppRun)->member.run.nCharOfs &&
215 nCharOfs < nParaOfs + (*ppRun)->member.run.nCharOfs + eollen) {
220 pPara = pPara->member.para.next_para;
222 *ppRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
224 assert((*ppRun)->member.run.nFlags & MERF_ENDPARA);
227 /******************************************************************************
230 * Merges two adjacent runs, the one given as a parameter and the next one.
232 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
234 ME_DisplayItem *pNext = p->next;
236 assert(p->type == diRun && pNext->type == diRun);
237 assert(p->member.run.nCharOfs != -1);
238 ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
240 /* if we were at the end of screen line, and the next run is in the new
241 * line, then it's not the end of the line anymore */
242 if (editor->bCaretAtEnd && editor->pCursors[0].pRun == pNext)
243 editor->bCaretAtEnd = FALSE;
244 /* Update all cursors so that they don't contain the soon deleted run */
245 for (i=0; i<editor->nCursors; i++) {
246 if (editor->pCursors[i].pRun == pNext) {
247 editor->pCursors[i].pRun = p;
248 editor->pCursors[i].nOffset += ME_StrVLen(p->member.run.strText);
252 ME_AppendString(p->member.run.strText, pNext->member.run.strText);
254 ME_DestroyDisplayItem(pNext);
255 ME_UpdateRunFlags(editor, &p->member.run);
256 if(TRACE_ON(richedit))
258 TRACE("Before check after join\n");
259 ME_CheckCharOffsets(editor);
260 TRACE("After check after join\n");
264 /******************************************************************************
267 * Splits a run into two in a given place. It also updates the screen position
268 * and size (extent) of the newly generated runs.
270 ME_DisplayItem *ME_SplitRun(ME_Context *c, ME_DisplayItem *item, int nVChar)
272 ME_TextEditor *editor = c->editor;
273 ME_DisplayItem *item2 = NULL;
275 ME_Paragraph *para = &ME_GetParagraph(item)->member.para;
277 assert(item->member.run.nCharOfs != -1);
278 if(TRACE_ON(richedit))
280 TRACE("Before check before split\n");
281 ME_CheckCharOffsets(editor);
282 TRACE("After check before split\n");
285 run = &item->member.run;
287 TRACE("Before split: %s(%d, %d)\n", debugstr_w(run->strText->szData),
288 run->pt.x, run->pt.y);
290 item2 = ME_SplitRunSimple(editor, item, nVChar);
292 run2 = &item2->member.run;
294 ME_CalcRunExtent(c, para, run);
295 ME_CalcRunExtent(c, para, run2);
297 run2->pt.x = run->pt.x+run->nWidth;
298 run2->pt.y = run->pt.y;
300 if(TRACE_ON(richedit))
302 TRACE("Before check after split\n");
303 ME_CheckCharOffsets(editor);
304 TRACE("After check after split\n");
305 TRACE("After split: %s(%d, %d), %s(%d, %d)\n",
306 debugstr_w(run->strText->szData), run->pt.x, run->pt.y,
307 debugstr_w(run2->strText->szData), run2->pt.x, run2->pt.y);
313 /******************************************************************************
316 * Does the most basic job of splitting a run into two - it does not
317 * update the positions and extents.
319 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, int nVChar)
321 ME_Run *run = &item->member.run;
322 ME_DisplayItem *item2;
325 assert(nVChar > 0 && nVChar < ME_StrVLen(run->strText));
326 assert(item->type == diRun);
327 assert(!(item->member.run.nFlags & MERF_NONTEXT));
328 assert(item->member.run.nCharOfs != -1);
330 item2 = ME_MakeRun(run->style,
331 ME_VSplitString(run->strText, nVChar), run->nFlags&MERF_SPLITMASK);
333 item2->member.run.nCharOfs = item->member.run.nCharOfs+
334 ME_VPosToPos(item->member.run.strText, nVChar);
336 run2 = &item2->member.run;
337 ME_InsertBefore(item->next, item2);
339 ME_UpdateRunFlags(editor, run);
340 ME_UpdateRunFlags(editor, run2);
341 for (i=0; i<editor->nCursors; i++) {
342 if (editor->pCursors[i].pRun == item &&
343 editor->pCursors[i].nOffset >= nVChar) {
344 assert(item2->type == diRun);
345 editor->pCursors[i].pRun = item2;
346 editor->pCursors[i].nOffset -= nVChar;
349 ME_GetParagraph(item)->member.para.nFlags |= MEPF_REWRAP;
353 /******************************************************************************
356 * A helper function to create run structures quickly.
358 ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
360 ME_DisplayItem *item = ME_MakeDI(diRun);
361 item->member.run.style = s;
362 item->member.run.strText = strData;
363 item->member.run.nFlags = nFlags;
364 item->member.run.nCharOfs = -1;
369 /******************************************************************************
372 * Inserts a run at a given character position (offset).
374 ME_DisplayItem *ME_InsertRun(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem *pItem)
379 assert(pItem->type == diRun || pItem->type == diUndoInsertRun);
381 ME_CursorFromCharOfs(editor, nCharOfs, &tmp);
382 pDI = ME_InsertRunAtCursor(editor, &tmp, pItem->member.run.style,
383 pItem->member.run.strText->szData,
384 pItem->member.run.strText->nLen,
385 pItem->member.run.nFlags);
390 /******************************************************************************
391 * ME_InsertRunAtCursor
393 * Inserts a new run with given style, flags and content at a given position,
394 * which is passed as a cursor structure (which consists of a run and
395 * a run-relative character offset).
398 ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
399 const WCHAR *str, int len, int flags)
404 if (cursor->nOffset) {
405 /* We're inserting at the middle of the existing run, which means that
406 * that run must be split. It isn't always necessary, but */
407 cursor->pRun = ME_SplitRunSimple(editor, cursor->pRun, cursor->nOffset);
411 pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
413 pUI->nStart = (ME_GetParagraph(cursor->pRun)->member.para.nCharOfs
414 + cursor->pRun->member.run.nCharOfs);
418 pDI = ME_MakeRun(style, ME_MakeStringN(str, len), flags);
419 pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
420 ME_InsertBefore(cursor->pRun, pDI);
421 TRACE("Shift length:%d\n", len);
422 ME_PropagateCharOffset(cursor->pRun, len);
423 ME_GetParagraph(cursor->pRun)->member.para.nFlags |= MEPF_REWRAP;
427 /******************************************************************************
430 * Determine some of run attributes given its content (style, text content).
431 * Some flags cannot be determined by this function (MERF_GRAPHICS,
434 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
436 assert(run->nCharOfs != -1);
438 if (RUN_IS_HIDDEN(run))
439 run->nFlags |= MERF_HIDDEN;
441 run->nFlags &= ~MERF_HIDDEN;
443 if (ME_IsSplitable(run->strText))
444 run->nFlags |= MERF_SPLITTABLE;
446 run->nFlags &= ~MERF_SPLITTABLE;
448 if (!(run->nFlags & MERF_NOTEXT)) {
449 if (ME_IsWhitespaces(run->strText))
450 run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
453 run->nFlags &= ~MERF_WHITESPACE;
455 if (ME_IsWSpace(ME_GetCharFwd(run->strText,0)))
456 run->nFlags |= MERF_STARTWHITE;
458 run->nFlags &= ~MERF_STARTWHITE;
460 if (ME_IsWSpace(ME_GetCharBack(run->strText,0)))
461 run->nFlags |= MERF_ENDWHITE;
463 run->nFlags &= ~MERF_ENDWHITE;
467 run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
470 /******************************************************************************
473 * Sets run extent for graphics runs. This functionality is just a placeholder
474 * for future OLE object support, and will be removed.
476 void ME_GetGraphicsSize(ME_TextEditor *editor, ME_Run *run, SIZE *pSize)
478 assert(run->nFlags & MERF_GRAPHICS);
483 /******************************************************************************
486 * Returns a character position inside the run given a run-relative
487 * pixel horizontal position. This version rounds left (ie. if the second
488 * character is at pixel position 8, then for cx=0..7 it returns 0).
490 int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Run *run)
496 if (!run->strText->nLen)
499 if (run->nFlags & (MERF_TAB | MERF_CELL))
501 if (cx < run->nWidth/2)
505 if (run->nFlags & MERF_GRAPHICS)
508 ME_GetGraphicsSize(editor, run, &sz);
513 hDC = GetDC(editor->hWnd);
514 hOldFont = ME_SelectStyleFont(editor, hDC, run->style);
516 if (editor->cPasswordMask)
518 ME_String *strMasked = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(run->strText));
519 GetTextExtentExPointW(hDC, strMasked->szData, run->strText->nLen,
520 cx, &fit, NULL, &sz);
521 ME_DestroyString(strMasked);
525 GetTextExtentExPointW(hDC, run->strText->szData, run->strText->nLen,
526 cx, &fit, NULL, &sz);
529 ME_UnselectStyleFont(editor, hDC, run->style, hOldFont);
530 ReleaseDC(editor->hWnd, hDC);
534 /******************************************************************************
535 * ME_CharFromPointCursor
537 * Returns a character position inside the run given a run-relative
538 * pixel horizontal position. This version rounds to the nearest character edge
539 * (ie. if the second character is at pixel position 8, then for cx=0..3
540 * it returns 0, and for cx=4..7 it returns 1).
542 * It is used for mouse click handling, for better usability (and compatibility
543 * with the native control).
545 int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
547 ME_String *strRunText;
548 /* This could point to either the run's real text, or it's masked form in a password control */
550 int fit = 0, fit1 = 0;
554 if (!run->strText->nLen)
557 if (run->nFlags & (MERF_TAB | MERF_CELL))
559 if (cx < run->nWidth/2)
563 if (run->nFlags & MERF_GRAPHICS)
566 ME_GetGraphicsSize(editor, run, &sz);
572 if (editor->cPasswordMask)
573 strRunText = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(run->strText));
575 strRunText = run->strText;
577 hDC = GetDC(editor->hWnd);
578 hOldFont = ME_SelectStyleFont(editor, hDC, run->style);
579 GetTextExtentExPointW(hDC, strRunText->szData, strRunText->nLen,
580 cx, &fit, NULL, &sz);
581 if (fit != strRunText->nLen)
585 GetTextExtentPoint32W(hDC, strRunText->szData, fit, &sz2);
586 fit1 = ME_StrRelPos(strRunText, fit, &chars);
587 GetTextExtentPoint32W(hDC, strRunText->szData, fit1, &sz3);
588 if (cx >= (sz2.cx+sz3.cx)/2)
592 if (editor->cPasswordMask)
593 ME_DestroyString(strRunText);
595 ME_UnselectStyleFont(editor, hDC, run->style, hOldFont);
596 ReleaseDC(editor->hWnd, hDC);
600 /******************************************************************************
603 * Returns a run-relative pixel position given a run-relative character
604 * position (character offset)
606 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
609 HDC hDC = GetDC(editor->hWnd);
611 ME_String *strRunText;
612 /* This could point to either the run's real text, or it's masked form in a password control */
614 if (pRun->nFlags & MERF_GRAPHICS)
616 if (!nOffset) return 0;
617 ME_GetGraphicsSize(editor, pRun, &size);
621 if (editor->cPasswordMask)
622 strRunText = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(pRun->strText));
624 strRunText = pRun->strText;
626 hOldFont = ME_SelectStyleFont(editor, hDC, pRun->style);
627 GetTextExtentPoint32W(hDC, strRunText->szData, nOffset, &size);
628 ME_UnselectStyleFont(editor, hDC, pRun->style, hOldFont);
629 ReleaseDC(editor->hWnd, hDC);
630 if (editor->cPasswordMask)
631 ME_DestroyString(strRunText);
635 /******************************************************************************
638 * Finds a width and a height of the text using a specified style
640 static void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s, SIZE *size)
644 hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
645 GetTextExtentPoint32W(hDC, szText, nChars, size);
646 ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
649 /******************************************************************************
650 * ME_GetRunSizeCommon
652 * Finds width, height, ascent and descent of a run, up to given character
655 static SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
656 int *pAscent, int *pDescent)
659 int nMaxLen = ME_StrVLen(run->strText);
664 /* FIXME the following call also ensures that TEXTMETRIC structure is filled
665 * this is wasteful for MERF_NONTEXT runs, but that shouldn't matter
669 if (c->editor->cPasswordMask)
671 ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask,nLen);
672 ME_GetTextExtent(c, szMasked->szData, nLen,run->style, &size);
673 ME_DestroyString(szMasked);
677 ME_GetTextExtent(c, run->strText->szData, nLen, run->style, &size);
679 *pAscent = run->style->tm.tmAscent;
680 *pDescent = run->style->tm.tmDescent;
681 size.cy = *pAscent + *pDescent;
683 if (run->nFlags & MERF_TAB)
685 int pos = 0, i = 0, ppos;
686 int lpsx = GetDeviceCaps(c->hDC, LOGPIXELSX);
687 PARAFORMAT2 *pFmt = para->pFmt;
689 if (i < pFmt->cTabCount)
691 pos = pFmt->rgxTabs[i]&0x00FFFFFF;
696 pos += 720-(pos%720);
698 ppos = pos*lpsx/1440;
699 if (ppos>run->pt.x) {
700 size.cx = ppos - run->pt.x;
704 size.cy = *pAscent + *pDescent;
707 if (run->nFlags & MERF_GRAPHICS)
709 ME_GetGraphicsSize(c->editor, run, &size);
710 if (size.cy > *pAscent)
712 /* descent is unchanged */
715 if (run->nFlags & MERF_CELL)
717 int lpsx = GetDeviceCaps(c->hDC, LOGPIXELSX);
719 size.cx = run->pCell->nRightBoundary * lpsx / 1440 - run->pt.x;
725 /******************************************************************************
728 * Finds width and height (but not ascent and descent) of a part of the run
729 * up to given character.
731 SIZE ME_GetRunSize(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen)
734 return ME_GetRunSizeCommon(c, para, run, nLen, &asc, &desc);
737 /******************************************************************************
740 * Updates the size of the run (fills width, ascent and descent). The height
741 * is calculated based on whole row's ascent and descent anyway, so no need
744 void ME_CalcRunExtent(ME_Context *c, const ME_Paragraph *para, ME_Run *run)
746 if (run->nFlags & MERF_HIDDEN)
750 int nEnd = ME_StrVLen(run->strText);
751 SIZE size = ME_GetRunSizeCommon(c, para, run, nEnd, &run->nAscent, &run->nDescent);
752 run->nWidth = size.cx;
754 WARN("size.cx == 0\n");
758 /******************************************************************************
761 * This should ensure that the given paragraph is wrapped so that its screen
762 * row structure may be used. But it doesn't, yet.
764 void ME_MustBeWrapped(ME_Context *c, ME_DisplayItem *para)
766 assert(para->type == diParagraph);
770 /******************************************************************************
771 * ME_SetSelectionCharFormat
773 * Applies a style change, either to a current selection, or to insert cursor
774 * (ie. the style next typed characters will use).
776 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
779 ME_GetSelection(editor, &nFrom, &nTo);
783 if (!editor->pBuffer->pCharStyle)
784 editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
785 s = ME_ApplyStyle(editor->pBuffer->pCharStyle, pFmt);
786 ME_ReleaseStyle(editor->pBuffer->pCharStyle);
787 editor->pBuffer->pCharStyle = s;
790 ME_SetCharFormat(editor, nFrom, nTo-nFrom, pFmt);
793 /******************************************************************************
796 * Applies a style change to the specified part of the text
798 void ME_SetCharFormat(ME_TextEditor *editor, int nOfs, int nChars, CHARFORMAT2W *pFmt)
801 ME_DisplayItem *para;
803 ME_CursorFromCharOfs(editor, nOfs, &tmp);
805 tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
807 ME_CursorFromCharOfs(editor, nOfs+nChars, &tmp2);
809 tmp2.pRun = ME_SplitRunSimple(editor, tmp2.pRun, tmp2.nOffset);
811 para = ME_GetParagraph(tmp.pRun);
812 para->member.para.nFlags |= MEPF_REWRAP;
814 while(tmp.pRun != tmp2.pRun)
816 ME_UndoItem *undo = NULL;
817 ME_Style *new_style = ME_ApplyStyle(tmp.pRun->member.run.style, pFmt);
818 /* ME_DumpStyle(new_style); */
819 undo = ME_AddUndoItem(editor, diUndoSetCharFormat, NULL);
821 undo->nStart = tmp.pRun->member.run.nCharOfs+para->member.para.nCharOfs;
822 undo->nLen = tmp.pRun->member.run.strText->nLen;
823 undo->di.member.ustyle = tmp.pRun->member.run.style;
824 /* we'd have to addref undo..ustyle and release tmp...style
825 but they'd cancel each other out so we can do nothing instead */
828 ME_ReleaseStyle(tmp.pRun->member.run.style);
829 tmp.pRun->member.run.style = new_style;
830 tmp.pRun = ME_FindItemFwd(tmp.pRun, diRunOrParagraph);
831 if (tmp.pRun->type == diParagraph)
834 tmp.pRun = ME_FindItemFwd(tmp.pRun, diRun);
835 if (tmp.pRun != tmp2.pRun)
836 para->member.para.nFlags |= MEPF_REWRAP;
842 /******************************************************************************
843 * ME_SetDefaultCharFormat
845 * Applies a style change to the default character style.
847 void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
852 assert(mod->cbSize == sizeof(CHARFORMAT2W));
853 undo = ME_AddUndoItem(editor, diUndoSetDefaultCharFormat, NULL);
857 undo->di.member.ustyle = editor->pBuffer->pDefaultStyle;
858 ME_AddRefStyle(undo->di.member.ustyle);
860 style = ME_ApplyStyle(editor->pBuffer->pDefaultStyle, mod);
861 editor->pBuffer->pDefaultStyle->fmt = style->fmt;
862 editor->pBuffer->pDefaultStyle->tm = style->tm;
863 ME_ReleaseStyle(style);
864 ME_MarkAllForWrapping(editor);
865 /* pcf = editor->pBuffer->pDefaultStyle->fmt; */
868 static void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
870 ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
873 /******************************************************************************
874 * ME_GetDefaultCharFormat
876 * Retrieves the current default character style (the one applied where no
877 * other style was applied) .
879 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
882 ME_GetSelection(editor, &nFrom, &nTo);
883 ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
886 /******************************************************************************
887 * ME_GetSelectionCharFormat
889 * If selection exists, it returns all style elements that are set consistently
890 * in the whole selection. If not, it just returns the current style.
892 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
895 ME_GetSelection(editor, &nFrom, &nTo);
896 if (nFrom == nTo && editor->pBuffer->pCharStyle)
898 ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
901 ME_GetCharFormat(editor, nFrom, nTo, pFmt);
904 /******************************************************************************
907 * Returns the style consisting of those attributes which are consistently set
908 * in the whole character range.
910 void ME_GetCharFormat(ME_TextEditor *editor, int nFrom, int nTo, CHARFORMAT2W *pFmt)
912 ME_DisplayItem *run, *run_end;
913 int nOffset, nOffset2;
916 ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
917 if (nFrom == nTo) /* special case - if selection is empty, take previous char's formatting */
921 ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
922 if (tmp_run->type == diRun) {
923 ME_GetRunCharFormat(editor, tmp_run, pFmt);
927 ME_GetRunCharFormat(editor, run, pFmt);
931 if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
933 ME_RunOfsFromCharOfs(editor, nTo, &run_end, &nOffset2);
935 ME_GetRunCharFormat(editor, run, pFmt);
937 if (run == run_end) return;
940 /* FIXME add more style feature comparisons */
941 int nAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR;
942 int nEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE;
944 run = ME_FindItemFwd(run, diRun);
946 ZeroMemory(&tmp, sizeof(tmp));
947 tmp.cbSize = sizeof(tmp);
948 ME_GetRunCharFormat(editor, run, &tmp);
950 assert((tmp.dwMask & nAttribs) == nAttribs);
951 assert((tmp.dwMask & nEffects) == nEffects);
952 /* reset flags that differ */
954 if (pFmt->yHeight != tmp.yHeight)
955 pFmt->dwMask &= ~CFM_SIZE;
956 if (pFmt->dwMask & CFM_FACE)
958 if (!(tmp.dwMask & CFM_FACE))
959 pFmt->dwMask &= ~CFM_FACE;
960 else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName))
961 pFmt->dwMask &= ~CFM_FACE;
963 if (pFmt->yHeight != tmp.yHeight)
964 pFmt->dwMask &= ~CFM_SIZE;
965 if (pFmt->dwMask & CFM_COLOR)
967 if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
969 if (pFmt->crTextColor != tmp.crTextColor)
970 pFmt->dwMask &= ~CFM_COLOR;
974 pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & nEffects);
976 } while(run != run_end);