wined3d: Clear the renderbuffer IDs on unload.
[wine.git] / dlls / riched20 / run.c
blob3126cc9ba29c5ef8011ce446349736502cae8281
1 /*
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
24 #include "editor.h"
26 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
27 WINE_DECLARE_DEBUG_CHANNEL(richedit_check);
28 WINE_DECLARE_DEBUG_CHANNEL(richedit_lists);
30 /******************************************************************************
31 * ME_CanJoinRuns
33 * Returns TRUE if two runs can be safely merged into one, FALSE otherwise.
35 BOOL ME_CanJoinRuns(const ME_Run *run1, const ME_Run *run2)
37 if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
38 return FALSE;
39 if (run1->style != run2->style)
40 return FALSE;
41 if ((run1->nFlags & MERF_STYLEFLAGS) != (run2->nFlags & MERF_STYLEFLAGS))
42 return FALSE;
43 return TRUE;
46 void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift)
48 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
49 assert(p);
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.
58 */
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
64 */
65 if (p->type == diRun) /* propagate in all runs in this para */
67 TRACE("PropagateCharOffset(%s, %d)\n", debugstr_run( &p->member.run ), shift);
68 do {
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.
77 */
78 if (p->type == diParagraph) /* propagate in all next paras */
80 do {
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 /******************************************************************************
97 * ME_CheckCharOffsets
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;
106 TRACE_(richedit_check)("Checking begin\n");
107 if(TRACE_ON(richedit_lists))
109 TRACE_(richedit_lists)("---\n");
110 ME_DumpDocument(editor->pBuffer);
112 do {
113 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
114 switch(p->type) {
115 case diTextEnd:
116 TRACE_(richedit_check)("tend, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
117 assert(ofsp+ofs == p->member.para.nCharOfs);
118 TRACE_(richedit_check)("Checking finished\n");
119 return;
120 case diParagraph:
121 TRACE_(richedit_check)("para, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
122 assert(ofsp+ofs == p->member.para.nCharOfs);
123 ofsp = p->member.para.nCharOfs;
124 ofs = 0;
125 break;
126 case diRun:
127 TRACE_(richedit_check)("run, real ofs = %d (+ofsp = %d), counted = %d, len = %d, txt = %s, flags=%08x, fx&mask = %08x\n",
128 p->member.run.nCharOfs, p->member.run.nCharOfs+ofsp, ofsp+ofs,
129 p->member.run.len, debugstr_run( &p->member.run ),
130 p->member.run.nFlags,
131 p->member.run.style->fmt.dwMask & p->member.run.style->fmt.dwEffects);
132 assert(ofs == p->member.run.nCharOfs);
133 assert(p->member.run.len);
134 ofs += p->member.run.len;
135 break;
136 case diCell:
137 TRACE_(richedit_check)("cell\n");
138 break;
139 default:
140 assert(0);
142 } while(1);
143 TRACE_(richedit_check)("Checking finished\n");
146 /******************************************************************************
147 * ME_CharOfsFromRunOfs
149 * Converts a character position relative to the start of the run, to a
150 * character position relative to the start of the document.
151 * Kind of a "local to global" offset conversion.
153 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara,
154 const ME_DisplayItem *pRun, int nOfs)
156 assert(pRun && pRun->type == diRun);
157 assert(pPara && pPara->type == diParagraph);
158 return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs + nOfs;
161 /******************************************************************************
162 * ME_CursorFromCharOfs
164 * Converts a character offset (relative to the start of the document) to
165 * a cursor structure (which contains a run and a position relative to that
166 * run).
168 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
170 ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pPara,
171 &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,
182 int nCharOfs,
183 ME_DisplayItem **ppPara,
184 ME_DisplayItem **ppRun,
185 int *pOfs)
187 ME_DisplayItem *item, *next_item;
189 nCharOfs = max(nCharOfs, 0);
190 nCharOfs = min(nCharOfs, ME_GetTextLength(editor));
192 /* Find the paragraph at the offset. */
193 next_item = editor->pBuffer->pFirst->member.para.next_para;
194 do {
195 item = next_item;
196 next_item = item->member.para.next_para;
197 } while (next_item->member.para.nCharOfs <= nCharOfs);
198 assert(item->type == diParagraph);
199 nCharOfs -= item->member.para.nCharOfs;
200 if (ppPara) *ppPara = item;
202 /* Find the run at the offset. */
203 next_item = ME_FindItemFwd(item, diRun);
204 do {
205 item = next_item;
206 next_item = ME_FindItemFwd(item, diRunOrParagraphOrEnd);
207 } while (next_item->type == diRun &&
208 next_item->member.run.nCharOfs <= nCharOfs);
209 assert(item->type == diRun);
210 nCharOfs -= item->member.run.nCharOfs;
212 if (ppRun) *ppRun = item;
213 if (pOfs) *pOfs = nCharOfs;
216 /******************************************************************************
217 * ME_JoinRuns
219 * Merges two adjacent runs, the one given as a parameter and the next one.
221 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
223 ME_DisplayItem *pNext = p->next;
224 int i;
225 assert(p->type == diRun && pNext->type == diRun);
226 assert(p->member.run.nCharOfs != -1);
227 ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
229 /* Update all cursors so that they don't contain the soon deleted run */
230 for (i=0; i<editor->nCursors; i++) {
231 if (editor->pCursors[i].pRun == pNext) {
232 editor->pCursors[i].pRun = p;
233 editor->pCursors[i].nOffset += p->member.run.len;
237 p->member.run.len += pNext->member.run.len;
238 ME_Remove(pNext);
239 ME_DestroyDisplayItem(pNext);
240 ME_UpdateRunFlags(editor, &p->member.run);
241 if(TRACE_ON(richedit_check))
242 ME_CheckCharOffsets(editor);
245 /******************************************************************************
246 * ME_SplitRunSimple
248 * Does the most basic job of splitting a run into two - it does not
249 * update the positions and extents.
251 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_Cursor *cursor)
253 ME_DisplayItem *run = cursor->pRun;
254 ME_DisplayItem *new_run;
255 int i;
256 int nOffset = cursor->nOffset;
258 assert(!(run->member.run.nFlags & MERF_NONTEXT));
260 new_run = ME_MakeRun(run->member.run.style,
261 run->member.run.nFlags & MERF_SPLITMASK);
262 new_run->member.run.nCharOfs = run->member.run.nCharOfs + nOffset;
263 new_run->member.run.len = run->member.run.len - nOffset;
264 new_run->member.run.para = run->member.run.para;
265 run->member.run.len = nOffset;
266 cursor->pRun = new_run;
267 cursor->nOffset = 0;
269 ME_InsertBefore(run->next, new_run);
271 ME_UpdateRunFlags(editor, &run->member.run);
272 ME_UpdateRunFlags(editor, &new_run->member.run);
273 for (i = 0; i < editor->nCursors; i++) {
274 if (editor->pCursors[i].pRun == run &&
275 editor->pCursors[i].nOffset >= nOffset) {
276 editor->pCursors[i].pRun = new_run;
277 editor->pCursors[i].nOffset -= nOffset;
280 cursor->pPara->member.para.nFlags |= MEPF_REWRAP;
281 return run;
284 /******************************************************************************
285 * ME_MakeRun
287 * A helper function to create run structures quickly.
289 ME_DisplayItem *ME_MakeRun(ME_Style *s, int nFlags)
291 ME_DisplayItem *item = ME_MakeDI(diRun);
292 item->member.run.style = s;
293 item->member.run.ole_obj = NULL;
294 item->member.run.nFlags = nFlags;
295 item->member.run.nCharOfs = -1;
296 item->member.run.len = 0;
297 item->member.run.para = NULL;
298 item->member.run.num_glyphs = 0;
299 item->member.run.max_glyphs = 0;
300 item->member.run.glyphs = NULL;
301 item->member.run.vis_attrs = NULL;
302 item->member.run.advances = NULL;
303 item->member.run.offsets = NULL;
304 item->member.run.max_clusters = 0;
305 item->member.run.clusters = NULL;
306 ME_AddRefStyle(s);
307 return item;
310 /******************************************************************************
311 * ME_InsertRunAtCursor
313 * Inserts a new run with given style, flags and content at a given position,
314 * which is passed as a cursor structure (which consists of a run and
315 * a run-relative character offset).
317 ME_DisplayItem *
318 ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
319 const WCHAR *str, int len, int flags)
321 ME_DisplayItem *pDI, *insert_before = cursor->pRun, *prev;
323 if (cursor->nOffset)
325 if (cursor->nOffset == cursor->pRun->member.run.len)
327 insert_before = ME_FindItemFwd( cursor->pRun, diRun );
328 if (!insert_before) insert_before = cursor->pRun; /* Always insert before the final eop run */
330 else
332 ME_SplitRunSimple( editor, cursor );
333 insert_before = cursor->pRun;
337 add_undo_delete_run( editor, insert_before->member.run.para->nCharOfs +
338 insert_before->member.run.nCharOfs, len );
340 pDI = ME_MakeRun(style, flags);
341 pDI->member.run.nCharOfs = insert_before->member.run.nCharOfs;
342 pDI->member.run.len = len;
343 pDI->member.run.para = insert_before->member.run.para;
344 ME_InsertString( pDI->member.run.para->text, pDI->member.run.nCharOfs, str, len );
345 ME_InsertBefore( insert_before, pDI );
346 TRACE("Shift length:%d\n", len);
347 ME_PropagateCharOffset( insert_before, len );
348 insert_before->member.run.para->nFlags |= MEPF_REWRAP;
350 /* Move any cursors that were at the end of the previous run to the end of the inserted run */
351 prev = ME_FindItemBack( pDI, diRun );
352 if (prev)
354 int i;
356 for (i = 0; i < editor->nCursors; i++)
358 if (editor->pCursors[i].pRun == prev &&
359 editor->pCursors[i].nOffset == prev->member.run.len)
361 editor->pCursors[i].pRun = pDI;
362 editor->pCursors[i].nOffset = len;
367 return pDI;
370 static BOOL run_is_splittable( const ME_Run *run )
372 WCHAR *str = get_text( run, 0 ), *p;
373 int i;
374 BOOL found_ink = FALSE;
376 for (i = 0, p = str; i < run->len; i++, p++)
378 if (ME_IsWSpace( *p ))
380 if (found_ink) return TRUE;
382 else
383 found_ink = TRUE;
385 return FALSE;
388 static BOOL run_is_entirely_ws( const ME_Run *run )
390 WCHAR *str = get_text( run, 0 ), *p;
391 int i;
393 for (i = 0, p = str; i < run->len; i++, p++)
394 if (!ME_IsWSpace( *p )) return FALSE;
396 return TRUE;
399 /******************************************************************************
400 * ME_UpdateRunFlags
402 * Determine some of run attributes given its content (style, text content).
403 * Some flags cannot be determined by this function (MERF_GRAPHICS,
404 * MERF_ENDPARA)
406 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
408 assert(run->nCharOfs >= 0);
410 if (RUN_IS_HIDDEN(run) || run->nFlags & MERF_TABLESTART)
411 run->nFlags |= MERF_HIDDEN;
412 else
413 run->nFlags &= ~MERF_HIDDEN;
415 if (run_is_splittable( run ))
416 run->nFlags |= MERF_SPLITTABLE;
417 else
418 run->nFlags &= ~MERF_SPLITTABLE;
420 if (!(run->nFlags & MERF_NOTEXT))
422 if (run_is_entirely_ws( run ))
423 run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
424 else
426 run->nFlags &= ~MERF_WHITESPACE;
428 if (ME_IsWSpace( *get_text( run, 0 ) ))
429 run->nFlags |= MERF_STARTWHITE;
430 else
431 run->nFlags &= ~MERF_STARTWHITE;
433 if (ME_IsWSpace( *get_text( run, run->len - 1 ) ))
434 run->nFlags |= MERF_ENDWHITE;
435 else
436 run->nFlags &= ~MERF_ENDWHITE;
439 else
440 run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
443 /******************************************************************************
444 * ME_CharFromPointContext
446 * Returns a character position inside the run given a run-relative
447 * pixel horizontal position.
449 * If closest is FALSE return the actual character
450 * If closest is TRUE will round to the closest leading edge.
451 * ie. if the second character is at pixel position 8 and third at 16 then for:
452 * closest = FALSE cx = 0..7 return 0, cx = 8..15 return 1
453 * closest = TRUE cx = 0..3 return 0, cx = 4..11 return 1.
455 int ME_CharFromPointContext(ME_Context *c, int cx, ME_Run *run, BOOL closest, BOOL visual_order)
457 ME_String *mask_text = NULL;
458 WCHAR *str;
459 int fit = 0;
460 HGDIOBJ hOldFont;
461 SIZE sz, sz2, sz3;
462 if (!run->len || cx <= 0)
463 return 0;
465 if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
467 if (!closest || cx < run->nWidth / 2) return 0;
468 return 1;
471 if (run->nFlags & MERF_GRAPHICS)
473 SIZE sz;
474 ME_GetOLEObjectSize(c, run, &sz);
475 if (!closest || cx < sz.cx / 2) return 0;
476 return 1;
479 if (run->para->nFlags & MEPF_COMPLEX)
481 int cp, trailing;
482 if (visual_order && run->script_analysis.fRTL) cx = run->nWidth - cx - 1;
484 ScriptXtoCP( cx, run->len, run->num_glyphs, run->clusters, run->vis_attrs, run->advances, &run->script_analysis,
485 &cp, &trailing );
486 TRACE("x %d cp %d trailing %d (run width %d) rtl %d log order %d\n", cx, cp, trailing, run->nWidth,
487 run->script_analysis.fRTL, run->script_analysis.fLogicalOrder);
488 return closest ? cp + trailing : cp;
491 if (c->editor->cPasswordMask)
493 mask_text = ME_MakeStringR( c->editor->cPasswordMask, run->len );
494 str = mask_text->szData;
496 else
497 str = get_text( run, 0 );
499 hOldFont = ME_SelectStyleFont(c, run->style);
500 GetTextExtentExPointW(c->hDC, str, run->len,
501 cx, &fit, NULL, &sz);
502 if (closest && fit != run->len)
504 GetTextExtentPoint32W(c->hDC, str, fit, &sz2);
505 GetTextExtentPoint32W(c->hDC, str, fit + 1, &sz3);
506 if (cx >= (sz2.cx+sz3.cx)/2)
507 fit = fit + 1;
510 ME_DestroyString( mask_text );
512 ME_UnselectStyleFont(c, run->style, hOldFont);
513 return fit;
516 int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Run *run, BOOL closest, BOOL visual_order)
518 ME_Context c;
519 int ret;
521 ME_InitContext( &c, editor, ITextHost_TxGetDC( editor->texthost ) );
522 ret = ME_CharFromPointContext( &c, cx, run, closest, visual_order );
523 ME_DestroyContext(&c);
524 return ret;
527 /******************************************************************************
528 * ME_GetTextExtent
530 * Finds a width and a height of the text using a specified style
532 static void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s, SIZE *size)
534 HGDIOBJ hOldFont;
535 if (c->hDC) {
536 hOldFont = ME_SelectStyleFont(c, s);
537 GetTextExtentPoint32W(c->hDC, szText, nChars, size);
538 ME_UnselectStyleFont(c, s, hOldFont);
539 } else {
540 size->cx = 0;
541 size->cy = 0;
545 /******************************************************************************
546 * ME_PointFromCharContext
548 * Returns a run-relative pixel position given a run-relative character
549 * position (character offset)
551 int ME_PointFromCharContext(ME_Context *c, ME_Run *pRun, int nOffset, BOOL visual_order)
553 SIZE size;
554 ME_String *mask_text = NULL;
555 WCHAR *str;
557 if (pRun->nFlags & MERF_GRAPHICS)
559 if (nOffset)
560 ME_GetOLEObjectSize(c, pRun, &size);
561 return nOffset != 0;
562 } else if (pRun->nFlags & MERF_ENDPARA) {
563 nOffset = 0;
566 if (pRun->para->nFlags & MEPF_COMPLEX)
568 int x;
569 ScriptCPtoX( nOffset, FALSE, pRun->len, pRun->num_glyphs, pRun->clusters,
570 pRun->vis_attrs, pRun->advances, &pRun->script_analysis, &x );
571 if (visual_order && pRun->script_analysis.fRTL) x = pRun->nWidth - x - 1;
572 return x;
574 if (c->editor->cPasswordMask)
576 mask_text = ME_MakeStringR(c->editor->cPasswordMask, pRun->len);
577 str = mask_text->szData;
579 else
580 str = get_text( pRun, 0 );
582 ME_GetTextExtent(c, str, nOffset, pRun->style, &size);
583 ME_DestroyString( mask_text );
584 return size.cx;
587 /******************************************************************************
588 * ME_PointFromChar
590 * Calls ME_PointFromCharContext after first creating a context.
592 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset, BOOL visual_order)
594 ME_Context c;
595 int ret;
597 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
598 ret = ME_PointFromCharContext( &c, pRun, nOffset, visual_order );
599 ME_DestroyContext(&c);
601 return ret;
604 /******************************************************************************
605 * ME_GetRunSizeCommon
607 * Finds width, height, ascent and descent of a run, up to given character
608 * (nLen).
610 SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
611 int startx, int *pAscent, int *pDescent)
613 SIZE size;
614 int nMaxLen = run->len;
616 if (nLen>nMaxLen)
617 nLen = nMaxLen;
619 /* FIXME the following call also ensures that TEXTMETRIC structure is filled
620 * this is wasteful for MERF_NONTEXT runs, but that shouldn't matter
621 * in practice
624 if (para->nFlags & MEPF_COMPLEX)
626 size.cx = run->nWidth;
628 else if (c->editor->cPasswordMask)
630 ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask,nLen);
631 ME_GetTextExtent(c, szMasked->szData, nLen,run->style, &size);
632 ME_DestroyString(szMasked);
634 else
636 ME_GetTextExtent(c, get_text( run, 0 ), nLen, run->style, &size);
638 *pAscent = run->style->tm.tmAscent;
639 *pDescent = run->style->tm.tmDescent;
640 size.cy = *pAscent + *pDescent;
642 if (run->nFlags & MERF_TAB)
644 int pos = 0, i = 0, ppos, shift = 0;
645 PARAFORMAT2 *pFmt = para->pFmt;
647 if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
648 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
649 /* The horizontal gap shifts the tab positions to leave the gap. */
650 shift = pFmt->dxOffset * 2;
651 do {
652 if (i < pFmt->cTabCount)
654 /* Only one side of the horizontal gap is needed at the end of
655 * the table row. */
656 if (i == pFmt->cTabCount -1)
657 shift = shift >> 1;
658 pos = shift + (pFmt->rgxTabs[i]&0x00FFFFFF);
659 i++;
661 else
663 pos += lDefaultTab - (pos % lDefaultTab);
665 ppos = ME_twips2pointsX(c, pos);
666 if (ppos > startx + run->pt.x) {
667 size.cx = ppos - startx - run->pt.x;
668 break;
670 } while(1);
671 size.cy = *pAscent + *pDescent;
672 return size;
674 if (run->nFlags & MERF_GRAPHICS)
676 ME_GetOLEObjectSize(c, run, &size);
677 if (size.cy > *pAscent)
678 *pAscent = size.cy;
679 /* descent is unchanged */
680 return size;
682 return size;
685 /******************************************************************************
686 * ME_SetSelectionCharFormat
688 * Applies a style change, either to a current selection, or to insert cursor
689 * (ie. the style next typed characters will use).
691 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
693 if (!ME_IsSelection(editor))
695 ME_Style *s;
696 if (!editor->pBuffer->pCharStyle)
697 editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
698 s = ME_ApplyStyle(editor, editor->pBuffer->pCharStyle, pFmt);
699 ME_ReleaseStyle(editor->pBuffer->pCharStyle);
700 editor->pBuffer->pCharStyle = s;
701 } else {
702 ME_Cursor *from, *to;
703 ME_GetSelection(editor, &from, &to);
704 ME_SetCharFormat(editor, from, to, pFmt);
708 /******************************************************************************
709 * ME_SetCharFormat
711 * Applies a style change to the specified part of the text
713 * The start and end cursors specify the part of the text. These cursors will
714 * be updated to stay valid, but this function may invalidate other
715 * non-selection cursors. The end cursor may be NULL to specify all the text
716 * following the start cursor.
718 * If no text is selected, then nothing is done.
720 void ME_SetCharFormat(ME_TextEditor *editor, ME_Cursor *start, ME_Cursor *end, CHARFORMAT2W *pFmt)
722 ME_DisplayItem *run, *start_run = start->pRun, *end_run = NULL;
724 if (end && start->pRun == end->pRun && start->nOffset == end->nOffset)
725 return;
727 if (start->nOffset == start->pRun->member.run.len)
728 start_run = ME_FindItemFwd( start->pRun, diRun );
729 else if (start->nOffset)
731 /* SplitRunSimple may or may not update the cursors, depending on whether they
732 * are selection cursors, but we need to make sure they are valid. */
733 int split_offset = start->nOffset;
734 ME_DisplayItem *split_run = ME_SplitRunSimple(editor, start);
735 start_run = start->pRun;
736 if (end && end->pRun == split_run)
738 end->pRun = start->pRun;
739 end->nOffset -= split_offset;
743 if (end)
745 if (end->nOffset == end->pRun->member.run.len)
746 end_run = ME_FindItemFwd( end->pRun, diRun );
747 else
749 if (end->nOffset) ME_SplitRunSimple(editor, end);
750 end_run = end->pRun;
754 for (run = start_run; run != end_run; run = ME_FindItemFwd( run, diRun ))
756 ME_Style *new_style = ME_ApplyStyle(editor, run->member.run.style, pFmt);
758 add_undo_set_char_fmt( editor, run->member.run.para->nCharOfs + run->member.run.nCharOfs,
759 run->member.run.len, &run->member.run.style->fmt );
760 ME_ReleaseStyle(run->member.run.style);
761 run->member.run.style = new_style;
762 run->member.run.para->nFlags |= MEPF_REWRAP;
766 static void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
768 ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
769 if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_CF1UNDERLINE))
771 pFmt->dwMask |= CFM_UNDERLINE;
772 pFmt->dwEffects |= CFE_UNDERLINE;
774 if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_UNDERLINENONE))
776 pFmt->dwMask |= CFM_UNDERLINE;
777 pFmt->dwEffects &= ~CFE_UNDERLINE;
781 /******************************************************************************
782 * ME_GetDefaultCharFormat
784 * Retrieves the current default character style (the one applied where no
785 * other style was applied) .
787 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
789 ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
792 /******************************************************************************
793 * ME_GetSelectionCharFormat
795 * If selection exists, it returns all style elements that are set consistently
796 * in the whole selection. If not, it just returns the current style.
798 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
800 ME_Cursor *from, *to;
801 if (!ME_IsSelection(editor) && editor->pBuffer->pCharStyle)
803 ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
804 return;
806 ME_GetSelection(editor, &from, &to);
807 ME_GetCharFormat(editor, from, to, pFmt);
810 /******************************************************************************
811 * ME_GetCharFormat
813 * Returns the style consisting of those attributes which are consistently set
814 * in the whole character range.
816 void ME_GetCharFormat(ME_TextEditor *editor, const ME_Cursor *from,
817 const ME_Cursor *to, CHARFORMAT2W *pFmt)
819 ME_DisplayItem *run, *run_end;
820 CHARFORMAT2W tmp;
822 run = from->pRun;
823 /* special case - if selection is empty, take previous char's formatting */
824 if (from->pRun == to->pRun && from->nOffset == to->nOffset)
826 if (!from->nOffset)
828 ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
829 if (tmp_run->type == diRun) {
830 ME_GetRunCharFormat(editor, tmp_run, pFmt);
831 return;
834 ME_GetRunCharFormat(editor, run, pFmt);
835 return;
838 run_end = to->pRun;
839 if (!to->nOffset)
840 run_end = ME_FindItemBack(run_end, diRun);
842 ME_GetRunCharFormat(editor, run, pFmt);
844 if (run == run_end) return;
846 do {
847 /* FIXME add more style feature comparisons */
848 DWORD dwAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR | CFM_UNDERLINETYPE;
849 DWORD dwEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_PROTECTED | CFM_LINK | CFM_SUPERSCRIPT;
851 run = ME_FindItemFwd(run, diRun);
853 ZeroMemory(&tmp, sizeof(tmp));
854 tmp.cbSize = sizeof(tmp);
855 ME_GetRunCharFormat(editor, run, &tmp);
857 assert((tmp.dwMask & dwAttribs) == dwAttribs);
858 /* reset flags that differ */
860 if (pFmt->yHeight != tmp.yHeight)
861 pFmt->dwMask &= ~CFM_SIZE;
862 if (pFmt->dwMask & CFM_FACE)
864 if (!(tmp.dwMask & CFM_FACE))
865 pFmt->dwMask &= ~CFM_FACE;
866 else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName) ||
867 pFmt->bPitchAndFamily != tmp.bPitchAndFamily)
868 pFmt->dwMask &= ~CFM_FACE;
870 if (pFmt->yHeight != tmp.yHeight)
871 pFmt->dwMask &= ~CFM_SIZE;
872 if (pFmt->bUnderlineType != tmp.bUnderlineType)
873 pFmt->dwMask &= ~CFM_UNDERLINETYPE;
874 if (pFmt->dwMask & CFM_COLOR)
876 if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
878 if (pFmt->crTextColor != tmp.crTextColor)
879 pFmt->dwMask &= ~CFM_COLOR;
883 pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & dwEffects);
884 pFmt->dwEffects = tmp.dwEffects;
886 } while(run != run_end);