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.
5 *
6 * Copyright 2004 by Krzysztof Foltman
7 * Copyright 2006 by Phil Krylov
8 *
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.
13 *
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.
18 *
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
22 */
23
24 #include "editor.h"
25
26 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
27 WINE_DECLARE_DEBUG_CHANNEL(richedit_check);
28 WINE_DECLARE_DEBUG_CHANNEL(richedit_lists);
29
30 /******************************************************************************
31 * ME_CanJoinRuns
32 *
33 * Returns 1 if two runs can be safely merged into one, 0 otherwise.
34 */
35 int ME_CanJoinRuns(const ME_Run *run1, const ME_Run *run2)
36 {
37 if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
38 return 0;
39 if (run1->style != run2->style)
40 return 0;
41 if ((run1->nFlags & MERF_STYLEFLAGS) != (run2->nFlags & MERF_STYLEFLAGS))
42 return 0;
43 return 1;
44 }
45
46 void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift)
47 {
48 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
49 assert(p);
50 ME_PropagateCharOffset(p, shift);
51 }
52
53 /******************************************************************************
54 * ME_PropagateCharOffsets
55 *
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)
60 {
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 */
66 {
67 TRACE("PropagateCharOffset(%s, %d)\n", debugstr_w(p->member.run.strText->szData), 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);
73 }
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 */
79 {
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);
85 }
86 /* diTextEnd also has character offset in it, which makes finding text length
87 * easier. But it needs to be up to date first.
88 */
89 if (p->type == diTextEnd)
90 {
91 p->member.para.nCharOfs += shift;
92 assert(p->member.para.nCharOfs >= 0);
93 }
94 }
95
96 /******************************************************************************
97 * ME_CheckCharOffsets
98 *
99 * Checks if editor lists' validity and optionally dumps the document structure
100 */
101 void ME_CheckCharOffsets(ME_TextEditor *editor)
102 {
103 ME_DisplayItem *p = editor->pBuffer->pFirst;
104 int ofs = 0, ofsp = 0;
105 if(TRACE_ON(richedit_lists))
106 {
107 TRACE_(richedit_lists)("---\n");
108 ME_DumpDocument(editor->pBuffer);
109 }
110 do {
111 p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
112 switch(p->type) {
113 case diTextEnd:
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);
116 return;
117 case diParagraph:
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;
121 ofs = 0;
122 break;
123 case diRun:
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;
132 break;
133 case diCell:
134 TRACE_(richedit_check)("cell\n");
135 break;
136 default:
137 assert(0);
138 }
139 } while(1);
140 }
141
142 /******************************************************************************
143 * ME_CharOfsFromRunOfs
144 *
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.
148 */
149 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara,
150 const ME_DisplayItem *pRun, int nOfs)
151 {
152 assert(pRun && pRun->type == diRun);
153 assert(pPara && pPara->type == diParagraph);
154 return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs + nOfs;
155 }
156
157 /******************************************************************************
158 * ME_CursorFromCharOfs
159 *
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
162 * run).
163 */
164 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
165 {
166 ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pPara,
167 &pCursor->pRun, &pCursor->nOffset);
168 }
169
170 /******************************************************************************
171 * ME_RunOfsFromCharOfs
172 *
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.
176 */
177 void ME_RunOfsFromCharOfs(ME_TextEditor *editor,
178 int nCharOfs,
179 ME_DisplayItem **ppPara,
180 ME_DisplayItem **ppRun,
181 int *pOfs)
182 {
183 ME_DisplayItem *item, *next_item;
184
185 nCharOfs = max(nCharOfs, 0);
186 nCharOfs = min(nCharOfs, ME_GetTextLength(editor));
187
188 /* Find the paragraph at the offset. */
189 next_item = editor->pBuffer->pFirst->member.para.next_para;
190 do {
191 item = next_item;
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;
197
198 /* Find the run at the offset. */
199 next_item = ME_FindItemFwd(item, diRun);
200 do {
201 item = next_item;
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;
207
208 if (ppRun) *ppRun = item;
209 if (pOfs) *pOfs = nCharOfs;
210 }
211
212 /******************************************************************************
213 * ME_JoinRuns
214 *
215 * Merges two adjacent runs, the one given as a parameter and the next one.
216 */
217 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
218 {
219 ME_DisplayItem *pNext = p->next;
220 int i;
221 assert(p->type == diRun && pNext->type == diRun);
222 assert(p->member.run.nCharOfs != -1);
223 ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
224
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;
230 }
231 }
232
233 ME_AppendString(p->member.run.strText, pNext->member.run.strText);
234 ME_Remove(pNext);
235 ME_DestroyDisplayItem(pNext);
236 ME_UpdateRunFlags(editor, &p->member.run);
237 if(TRACE_ON(richedit))
238 {
239 TRACE("Before check after join\n");
240 ME_CheckCharOffsets(editor);
241 TRACE("After check after join\n");
242 }
243 }
244
245 /******************************************************************************
246 * ME_SplitRun
247 *
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.
250 */
251 ME_DisplayItem *ME_SplitRun(ME_WrapContext *wc, ME_DisplayItem *item, int nVChar)
252 {
253 ME_TextEditor *editor = wc->context->editor;
254 ME_Run *run, *run2;
255 ME_Paragraph *para = &wc->pPara->member.para;
256 ME_Cursor cursor = {wc->pPara, item, nVChar};
257
258 assert(item->member.run.nCharOfs != -1);
259 if(TRACE_ON(richedit))
260 {
261 TRACE("Before check before split\n");
262 ME_CheckCharOffsets(editor);
263 TRACE("After check before split\n");
264 }
265
266 run = &item->member.run;
267
268 TRACE("Before split: %s(%d, %d)\n", debugstr_w(run->strText->szData),
269 run->pt.x, run->pt.y);
270
271 ME_SplitRunSimple(editor, &cursor);
272
273 run2 = &cursor.pRun->member.run;
274
275 ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run);
276
277 run2->pt.x = run->pt.x+run->nWidth;
278 run2->pt.y = run->pt.y;
279
280 if(TRACE_ON(richedit))
281 {
282 TRACE("Before check after split\n");
283 ME_CheckCharOffsets(editor);
284 TRACE("After check after split\n");
285 TRACE("After split: %s(%d, %d), %s(%d, %d)\n",
286 debugstr_w(run->strText->szData), run->pt.x, run->pt.y,
287 debugstr_w(run2->strText->szData), run2->pt.x, run2->pt.y);
288 }
289
290 return cursor.pRun;
291 }
292
293 /******************************************************************************
294 * ME_SplitRunSimple
295 *
296 * Does the most basic job of splitting a run into two - it does not
297 * update the positions and extents.
298 */
299 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_Cursor *cursor)
300 {
301 ME_DisplayItem *run = cursor->pRun;
302 ME_DisplayItem *new_run;
303 int i;
304 int nOffset = cursor->nOffset;
305
306 assert(!(run->member.run.nFlags & MERF_NONTEXT));
307
308 new_run = ME_MakeRun(run->member.run.style,
309 ME_VSplitString(run->member.run.strText, nOffset),
310 run->member.run.nFlags & MERF_SPLITMASK);
311
312 new_run->member.run.nCharOfs = run->member.run.nCharOfs + nOffset;
313 cursor->pRun = new_run;
314 cursor->nOffset = 0;
315
316 ME_InsertBefore(run->next, new_run);
317
318 ME_UpdateRunFlags(editor, &run->member.run);
319 ME_UpdateRunFlags(editor, &new_run->member.run);
320 for (i = 0; i < editor->nCursors; i++) {
321 if (editor->pCursors[i].pRun == run &&
322 editor->pCursors[i].nOffset >= nOffset) {
323 editor->pCursors[i].pRun = new_run;
324 editor->pCursors[i].nOffset -= nOffset;
325 }
326 }
327 cursor->pPara->member.para.nFlags |= MEPF_REWRAP;
328 return run;
329 }
330
331 /******************************************************************************
332 * ME_MakeRun
333 *
334 * A helper function to create run structures quickly.
335 */
336 ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
337 {
338 ME_DisplayItem *item = ME_MakeDI(diRun);
339 item->member.run.style = s;
340 item->member.run.ole_obj = NULL;
341 item->member.run.strText = strData;
342 item->member.run.nFlags = nFlags;
343 item->member.run.nCharOfs = -1;
344 ME_AddRefStyle(s);
345 return item;
346 }
347
348 /******************************************************************************
349 * ME_InsertRunAtCursor
350 *
351 * Inserts a new run with given style, flags and content at a given position,
352 * which is passed as a cursor structure (which consists of a run and
353 * a run-relative character offset).
354 */
355 ME_DisplayItem *
356 ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
357 const WCHAR *str, int len, int flags)
358 {
359 ME_DisplayItem *pDI;
360 ME_UndoItem *pUI;
361
362 if (cursor->nOffset)
363 ME_SplitRunSimple(editor, cursor);
364
365 pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
366 if (pUI) {
367 pUI->nStart = cursor->pPara->member.para.nCharOfs
368 + cursor->pRun->member.run.nCharOfs;
369 pUI->nLen = len;
370 }
371
372 pDI = ME_MakeRun(style, ME_MakeStringN(str, len), flags);
373 pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
374 ME_InsertBefore(cursor->pRun, pDI);
375 TRACE("Shift length:%d\n", len);
376 ME_PropagateCharOffset(cursor->pRun, len);
377 cursor->pPara->member.para.nFlags |= MEPF_REWRAP;
378 return pDI;
379 }
380
381 /******************************************************************************
382 * ME_UpdateRunFlags
383 *
384 * Determine some of run attributes given its content (style, text content).
385 * Some flags cannot be determined by this function (MERF_GRAPHICS,
386 * MERF_ENDPARA)
387 */
388 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
389 {
390 ME_String *strText = run->strText;
391 assert(run->nCharOfs >= 0);
392
393 if (RUN_IS_HIDDEN(run) || run->nFlags & MERF_TABLESTART)
394 run->nFlags |= MERF_HIDDEN;
395 else
396 run->nFlags &= ~MERF_HIDDEN;
397
398 if (ME_IsSplitable(strText))
399 run->nFlags |= MERF_SPLITTABLE;
400 else
401 run->nFlags &= ~MERF_SPLITTABLE;
402
403 if (!(run->nFlags & MERF_NOTEXT)) {
404 if (ME_IsWhitespaces(strText))
405 run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
406 else
407 {
408 run->nFlags &= ~MERF_WHITESPACE;
409
410 if (ME_IsWSpace(strText->szData[0]))
411 run->nFlags |= MERF_STARTWHITE;
412 else
413 run->nFlags &= ~MERF_STARTWHITE;
414
415 if (ME_IsWSpace(strText->szData[strText->nLen - 1]))
416 run->nFlags |= MERF_ENDWHITE;
417 else
418 run->nFlags &= ~MERF_ENDWHITE;
419 }
420 }
421 else
422 run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
423 }
424
425 /******************************************************************************
426 * ME_CharFromPoint
427 *
428 * Returns a character position inside the run given a run-relative
429 * pixel horizontal position. This version rounds left (ie. if the second
430 * character is at pixel position 8, then for cx=0..7 it returns 0).
431 */
432 int ME_CharFromPoint(ME_Context *c, int cx, ME_Run *run)
433 {
434 int fit = 0;
435 HGDIOBJ hOldFont;
436 SIZE sz;
437 if (!run->strText->nLen || cx <= 0)
438 return 0;
439
440 if (run->nFlags & MERF_TAB ||
441 (run->nFlags & (MERF_ENDCELL|MERF_ENDPARA)) == MERF_ENDCELL)
442 {
443 if (cx < run->nWidth/2)
444 return 0;
445 return 1;
446 }
447 if (run->nFlags & MERF_GRAPHICS)
448 {
449 SIZE sz;
450 ME_GetOLEObjectSize(c, run, &sz);
451 if (cx < sz.cx)
452 return 0;
453 return 1;
454 }
455 hOldFont = ME_SelectStyleFont(c, run->style);
456
457 if (c->editor->cPasswordMask)
458 {
459 ME_String *strMasked = ME_MakeStringR(c->editor->cPasswordMask, run->strText->nLen);
460 GetTextExtentExPointW(c->hDC, strMasked->szData, run->strText->nLen,
461 cx, &fit, NULL, &sz);
462 ME_DestroyString(strMasked);
463 }
464 else
465 {
466 GetTextExtentExPointW(c->hDC, run->strText->szData, run->strText->nLen,
467 cx, &fit, NULL, &sz);
468 }
469
470 ME_UnselectStyleFont(c, run->style, hOldFont);
471
472 return fit;
473 }
474
475 /******************************************************************************
476 * ME_CharFromPointCursor
477 *
478 * Returns a character position inside the run given a run-relative
479 * pixel horizontal position. This version rounds to the nearest character edge
480 * (ie. if the second character is at pixel position 8, then for cx=0..3
481 * it returns 0, and for cx=4..7 it returns 1).
482 *
483 * It is used for mouse click handling, for better usability (and compatibility
484 * with the native control).
485 */
486 int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
487 {
488 ME_String *strRunText;
489 /* This could point to either the run's real text, or it's masked form in a password control */
490
491 int fit = 0;
492 ME_Context c;
493 HGDIOBJ hOldFont;
494 SIZE sz, sz2, sz3;
495 if (!run->strText->nLen || cx <= 0)
496 return 0;
497
498 if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
499 {
500 if (cx < run->nWidth/2)
501 return 0;
502 return 1;
503 }
504 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
505 if (run->nFlags & MERF_GRAPHICS)
506 {
507 SIZE sz;
508 ME_GetOLEObjectSize(&c, run, &sz);
509 ME_DestroyContext(&c);
510 if (cx < sz.cx/2)
511 return 0;
512 return 1;
513 }
514
515 if (editor->cPasswordMask)
516 strRunText = ME_MakeStringR(editor->cPasswordMask, run->strText->nLen);
517 else
518 strRunText = run->strText;
519
520 hOldFont = ME_SelectStyleFont(&c, run->style);
521 GetTextExtentExPointW(c.hDC, strRunText->szData, strRunText->nLen,
522 cx, &fit, NULL, &sz);
523 if (fit != strRunText->nLen)
524 {
525 GetTextExtentPoint32W(c.hDC, strRunText->szData, fit, &sz2);
526 GetTextExtentPoint32W(c.hDC, strRunText->szData, fit + 1, &sz3);
527 if (cx >= (sz2.cx+sz3.cx)/2)
528 fit = fit + 1;
529 }
530
531 if (editor->cPasswordMask)
532 ME_DestroyString(strRunText);
533
534 ME_UnselectStyleFont(&c, run->style, hOldFont);
535 ME_DestroyContext(&c);
536 return fit;
537 }
538
539 /******************************************************************************
540 * ME_GetTextExtent
541 *
542 * Finds a width and a height of the text using a specified style
543 */
544 static void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s, SIZE *size)
545 {
546 HGDIOBJ hOldFont;
547 if (c->hDC) {
548 hOldFont = ME_SelectStyleFont(c, s);
549 GetTextExtentPoint32W(c->hDC, szText, nChars, size);
550 ME_UnselectStyleFont(c, s, hOldFont);
551 } else {
552 size->cx = 0;
553 size->cy = 0;
554 }
555 }
556
557 /******************************************************************************
558 * ME_PointFromChar
559 *
560 * Returns a run-relative pixel position given a run-relative character
561 * position (character offset)
562 */
563 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
564 {
565 SIZE size;
566 ME_Context c;
567 ME_String *strRunText;
568 /* This could point to either the run's real text, or it's masked form in a password control */
569
570 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
571 if (pRun->nFlags & MERF_GRAPHICS)
572 {
573 if (nOffset)
574 ME_GetOLEObjectSize(&c, pRun, &size);
575 ME_DestroyContext(&c);
576 return nOffset != 0;
577 } else if (pRun->nFlags & MERF_ENDPARA) {
578 nOffset = 0;
579 }
580
581 if (editor->cPasswordMask)
582 strRunText = ME_MakeStringR(editor->cPasswordMask, pRun->strText->nLen);
583 else
584 strRunText = pRun->strText;
585
586 ME_GetTextExtent(&c, strRunText->szData, nOffset, pRun->style, &size);
587 ME_DestroyContext(&c);
588 if (editor->cPasswordMask)
589 ME_DestroyString(strRunText);
590 return size.cx;
591 }
592
593 /******************************************************************************
594 * ME_GetRunSizeCommon
595 *
596 * Finds width, height, ascent and descent of a run, up to given character
597 * (nLen).
598 */
599 static SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
600 int startx, int *pAscent, int *pDescent)
601 {
602 SIZE size;
603 int nMaxLen = run->strText->nLen;
604
605 if (nLen>nMaxLen)
606 nLen = nMaxLen;
607
608 /* FIXME the following call also ensures that TEXTMETRIC structure is filled
609 * this is wasteful for MERF_NONTEXT runs, but that shouldn't matter
610 * in practice
611 */
612
613 if (c->editor->cPasswordMask)
614 {
615 ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask,nLen);
616 ME_GetTextExtent(c, szMasked->szData, nLen,run->style, &size);
617 ME_DestroyString(szMasked);
618 }
619 else
620 {
621 ME_GetTextExtent(c, run->strText->szData, nLen, run->style, &size);
622 }
623 *pAscent = run->style->tm.tmAscent;
624 *pDescent = run->style->tm.tmDescent;
625 size.cy = *pAscent + *pDescent;
626
627 if (run->nFlags & MERF_TAB)
628 {
629 int pos = 0, i = 0, ppos, shift = 0;
630 PARAFORMAT2 *pFmt = para->pFmt;
631
632 if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
633 pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
634 /* The horizontal gap shifts the tab positions to leave the gap. */
635 shift = pFmt->dxOffset * 2;
636 do {
637 if (i < pFmt->cTabCount)
638 {
639 /* Only one side of the horizontal gap is needed at the end of
640 * the table row. */
641 if (i == pFmt->cTabCount -1)
642 shift = shift >> 1;
643 pos = shift + (pFmt->rgxTabs[i]&0x00FFFFFF);
644 i++;
645 }
646 else
647 {
648 pos += lDefaultTab - (pos % lDefaultTab);
649 }
650 ppos = ME_twips2pointsX(c, pos);
651 if (ppos > startx + run->pt.x) {
652 size.cx = ppos - startx - run->pt.x;
653 break;
654 }
655 } while(1);
656 size.cy = *pAscent + *pDescent;
657 return size;
658 }
659 if (run->nFlags & MERF_GRAPHICS)
660 {
661 ME_GetOLEObjectSize(c, run, &size);
662 if (size.cy > *pAscent)
663 *pAscent = size.cy;
664 /* descent is unchanged */
665 return size;
666 }
667 return size;
668 }
669
670 /******************************************************************************
671 * ME_GetRunSize
672 *
673 * Finds width and height (but not ascent and descent) of a part of the run
674 * up to given character.
675 */
676 SIZE ME_GetRunSize(ME_Context *c, const ME_Paragraph *para,
677 ME_Run *run, int nLen, int startx)
678 {
679 int asc, desc;
680 return ME_GetRunSizeCommon(c, para, run, nLen, startx, &asc, &desc);
681 }
682
683 /******************************************************************************
684 * ME_CalcRunExtent
685 *
686 * Updates the size of the run (fills width, ascent and descent). The height
687 * is calculated based on whole row's ascent and descent anyway, so no need
688 * to use it here.
689 */
690 void ME_CalcRunExtent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run)
691 {
692 if (run->nFlags & MERF_HIDDEN)
693 run->nWidth = 0;
694 else
695 {
696 int nEnd = run->strText->nLen;
697 SIZE size = ME_GetRunSizeCommon(c, para, run, nEnd, startx,
698 &run->nAscent, &run->nDescent);
699 run->nWidth = size.cx;
700 if (!size.cx)
701 WARN("size.cx == 0\n");
702 }
703 }
704
705 /******************************************************************************
706 * ME_SetSelectionCharFormat
707 *
708 * Applies a style change, either to a current selection, or to insert cursor
709 * (ie. the style next typed characters will use).
710 */
711 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
712 {
713 if (!ME_IsSelection(editor))
714 {
715 ME_Style *s;
716 if (!editor->pBuffer->pCharStyle)
717 editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
718 s = ME_ApplyStyle(editor->pBuffer->pCharStyle, pFmt);
719 ME_ReleaseStyle(editor->pBuffer->pCharStyle);
720 editor->pBuffer->pCharStyle = s;
721 } else {
722 ME_Cursor *from, *to;
723 ME_GetSelection(editor, &from, &to);
724 ME_SetCharFormat(editor, from, to, pFmt);
725 }
726 }
727
728 /******************************************************************************
729 * ME_SetCharFormat
730 *
731 * Applies a style change to the specified part of the text
732 *
733 * The start and end cursors specify the part of the text. These cursors will
734 * be updated to stay valid, but this function may invalidate other
735 * non-selection cursors. The end cursor may be NULL to specify all the text
736 * following the start cursor.
737 *
738 * If no text is selected, then nothing is done.
739 */
740 void ME_SetCharFormat(ME_TextEditor *editor, ME_Cursor *start, ME_Cursor *end, CHARFORMAT2W *pFmt)
741 {
742 ME_DisplayItem *para;
743 ME_DisplayItem *run;
744 ME_DisplayItem *end_run = NULL;
745
746 if (end && start->pRun == end->pRun && start->nOffset == end->nOffset)
747 return;
748
749 if (start->nOffset)
750 {
751 /* SplitRunSimple may or may not update the cursors, depending on whether they
752 * are selection cursors, but we need to make sure they are valid. */
753 int split_offset = start->nOffset;
754 ME_DisplayItem *split_run = ME_SplitRunSimple(editor, start);
755 if (end && end->pRun == split_run)
756 {
757 end->pRun = start->pRun;
758 end->nOffset -= split_offset;
759 }
760 }
761
762 if (end && end->nOffset)
763 ME_SplitRunSimple(editor, end);
764 end_run = end ? end->pRun : NULL;
765
766 run = start->pRun;
767 para = start->pPara;
768 para->member.para.nFlags |= MEPF_REWRAP;
769
770 while(run != end_run)
771 {
772 ME_UndoItem *undo = NULL;
773 ME_Style *new_style = ME_ApplyStyle(run->member.run.style, pFmt);
774 /* ME_DumpStyle(new_style); */
775 undo = ME_AddUndoItem(editor, diUndoSetCharFormat, NULL);
776 if (undo) {
777 undo->nStart = run->member.run.nCharOfs+para->member.para.nCharOfs;
778 undo->nLen = run->member.run.strText->nLen;
779 undo->di.member.ustyle = run->member.run.style;
780 /* we'd have to addref undo...ustyle and release tmp...style
781 but they'd cancel each other out so we can do nothing instead */
782 }
783 else
784 ME_ReleaseStyle(run->member.run.style);
785 run->member.run.style = new_style;
786 run = ME_FindItemFwd(run, diRunOrParagraph);
787 if (run && run->type == diParagraph)
788 {
789 para = run;
790 run = ME_FindItemFwd(run, diRun);
791 if (run != end_run)
792 para->member.para.nFlags |= MEPF_REWRAP;
793 }
794 }
795 }
796
797 /******************************************************************************
798 * ME_SetDefaultCharFormat
799 *
800 * Applies a style change to the default character style.
801 */
802 void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
803 {
804 ME_Style *style;
805
806 assert(mod->cbSize == sizeof(CHARFORMAT2W));
807 style = ME_ApplyStyle(editor->pBuffer->pDefaultStyle, mod);
808 editor->pBuffer->pDefaultStyle->fmt = style->fmt;
809 editor->pBuffer->pDefaultStyle->tm = style->tm;
810 ME_ReleaseStyle(style);
811 ME_MarkAllForWrapping(editor);
812 /* pcf = editor->pBuffer->pDefaultStyle->fmt; */
813 }
814
815 static void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
816 {
817 ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
818 if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_CF1UNDERLINE))
819 {
820 pFmt->dwMask |= CFM_UNDERLINE;
821 pFmt->dwEffects |= CFE_UNDERLINE;
822 }
823 if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_UNDERLINENONE))
824 {
825 pFmt->dwMask |= CFM_UNDERLINE;
826 pFmt->dwEffects &= ~CFE_UNDERLINE;
827 }
828 }
829
830 /******************************************************************************
831 * ME_GetDefaultCharFormat
832 *
833 * Retrieves the current default character style (the one applied where no
834 * other style was applied) .
835 */
836 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
837 {
838 ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
839 }
840
841 /******************************************************************************
842 * ME_GetSelectionCharFormat
843 *
844 * If selection exists, it returns all style elements that are set consistently
845 * in the whole selection. If not, it just returns the current style.
846 */
847 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
848 {
849 ME_Cursor *from, *to;
850 if (!ME_IsSelection(editor) && editor->pBuffer->pCharStyle)
851 {
852 ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
853 return;
854 }
855 ME_GetSelection(editor, &from, &to);
856 ME_GetCharFormat(editor, from, to, pFmt);
857 }
858
859 /******************************************************************************
860 * ME_GetCharFormat
861 *
862 * Returns the style consisting of those attributes which are consistently set
863 * in the whole character range.
864 */
865 void ME_GetCharFormat(ME_TextEditor *editor, const ME_Cursor *from,
866 const ME_Cursor *to, CHARFORMAT2W *pFmt)
867 {
868 ME_DisplayItem *run, *run_end;
869 CHARFORMAT2W tmp;
870
871 run = from->pRun;
872 /* special case - if selection is empty, take previous char's formatting */
873 if (from->pRun == to->pRun && from->nOffset == to->nOffset)
874 {
875 if (!from->nOffset)
876 {
877 ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
878 if (tmp_run->type == diRun) {
879 ME_GetRunCharFormat(editor, tmp_run, pFmt);
880 return;
881 }
882 }
883 ME_GetRunCharFormat(editor, run, pFmt);
884 return;
885 }
886
887 run_end = to->pRun;
888 if (!to->nOffset)
889 run_end = ME_FindItemBack(run_end, diRun);
890
891 ME_GetRunCharFormat(editor, run, pFmt);
892
893 if (run == run_end) return;
894
895 do {
896 /* FIXME add more style feature comparisons */
897 DWORD dwAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR | CFM_UNDERLINETYPE;
898 DWORD dwEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_PROTECTED | CFM_LINK | CFM_SUPERSCRIPT;
899
900 run = ME_FindItemFwd(run, diRun);
901
902 ZeroMemory(&tmp, sizeof(tmp));
903 tmp.cbSize = sizeof(tmp);
904 ME_GetRunCharFormat(editor, run, &tmp);
905
906 assert((tmp.dwMask & dwAttribs) == dwAttribs);
907 /* reset flags that differ */
908
909 if (pFmt->yHeight != tmp.yHeight)
910 pFmt->dwMask &= ~CFM_SIZE;
911 if (pFmt->dwMask & CFM_FACE)
912 {
913 if (!(tmp.dwMask & CFM_FACE))
914 pFmt->dwMask &= ~CFM_FACE;
915 else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName) ||
916 pFmt->bPitchAndFamily != tmp.bPitchAndFamily)
917 pFmt->dwMask &= ~CFM_FACE;
918 }
919 if (pFmt->yHeight != tmp.yHeight)
920 pFmt->dwMask &= ~CFM_SIZE;
921 if (pFmt->bUnderlineType != tmp.bUnderlineType)
922 pFmt->dwMask &= ~CFM_UNDERLINETYPE;
923 if (pFmt->dwMask & CFM_COLOR)
924 {
925 if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
926 {
927 if (pFmt->crTextColor != tmp.crTextColor)
928 pFmt->dwMask &= ~CFM_COLOR;
929 }
930 }
931
932 pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & dwEffects);
933 pFmt->dwEffects = tmp.dwEffects;
934
935 } while(run != run_end);
936 }
937
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