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 if (p->member.run.nFlags & MERF_ENDPARA) {
131 assert(p->member.run.nCR + p->member.run.nLF > 0);
132 ofs += p->member.run.nCR + p->member.run.nLF;
133 }
134 else
135 ofs += ME_StrLen(p->member.run.strText);
136 break;
137 default:
138 assert(0);
139 }
140 } while(1);
141 }
142
143 /******************************************************************************
144 * ME_CharOfsFromRunOfs
145 *
146 * Converts a character position relative to the start of the run, to a
147 * character position relative to the start of the document.
148 * Kind of a "local to global" offset conversion.
149 */
150 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, ME_DisplayItem *pRun, int nOfs)
151 {
152 ME_DisplayItem *pPara;
153
154 assert(pRun->type == diRun);
155 assert(pRun->member.run.nCharOfs != -1);
156
157 pPara = ME_FindItemBack(pRun, diParagraph);
158 assert(pPara);
159 assert(pPara->type==diParagraph);
160 return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs
161 + ME_VPosToPos(pRun->member.run.strText, nOfs);
162 }
163
164 /******************************************************************************
165 * ME_CursorFromCharOfs
166 *
167 * Converts a character offset (relative to the start of the document) to
168 * a cursor structure (which contains a run and a position relative to that
169 * run).
170 */
171 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
172 {
173 ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pRun, &pCursor->nOffset);
174 }
175
176 /******************************************************************************
177 * ME_RunOfsFromCharOfs
178 *
179 * Find a run and relative character offset given an absolute character offset
180 * (absolute offset being an offset relative to the start of the document).
181 * Kind of a "global to local" offset conversion.
182 */
183 void ME_RunOfsFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem **ppRun, int *pOfs)
184 {
185 ME_DisplayItem *pPara;
186 int nParaOfs;
187
188 pPara = editor->pBuffer->pFirst->member.para.next_para;
189 assert(pPara);
190 assert(ppRun);
191 assert(pOfs);
192 while (pPara->type == diParagraph)
193 {
194 nParaOfs = pPara->member.para.nCharOfs;
195 assert(nCharOfs >= nParaOfs);
196
197 if (nCharOfs < pPara->member.para.next_para->member.para.nCharOfs)
198 {
199 int eollen = 1;
200 *ppRun = ME_FindItemFwd(pPara, diRun);
201 assert(*ppRun);
202 while (!((*ppRun)->member.run.nFlags & MERF_ENDPARA))
203 {
204 ME_DisplayItem *pNext = ME_FindItemFwd(*ppRun, diRun);
205 assert(pNext);
206 assert(pNext->type == diRun);
207 if (nCharOfs < nParaOfs + pNext->member.run.nCharOfs) {
208 *pOfs = ME_PosToVPos((*ppRun)->member.run.strText,
209 nCharOfs - nParaOfs - (*ppRun)->member.run.nCharOfs);
210 return;
211 }
212 *ppRun = pNext;
213 }
214 /* Recover proper character length of this line break */
215 eollen = (*ppRun)->member.run.nCR + (*ppRun)->member.run.nLF;
216 if (nCharOfs >= nParaOfs + (*ppRun)->member.run.nCharOfs &&
217 nCharOfs < nParaOfs + (*ppRun)->member.run.nCharOfs + eollen) {
218 /* FIXME: Might cause problems when actually requiring an offset in the
219 middle of a run that is considered a single line break */
220 *pOfs = 0;
221 return;
222 }
223 }
224 pPara = pPara->member.para.next_para;
225 }
226 *ppRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
227 *pOfs = 0;
228 assert((*ppRun)->member.run.nFlags & MERF_ENDPARA);
229 }
230
231 /******************************************************************************
232 * ME_JoinRuns
233 *
234 * Merges two adjacent runs, the one given as a parameter and the next one.
235 */
236 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
237 {
238 ME_DisplayItem *pNext = p->next;
239 int i;
240 assert(p->type == diRun && pNext->type == diRun);
241 assert(p->member.run.nCharOfs != -1);
242 ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
243
244 /* if we were at the end of screen line, and the next run is in the new
245 * line, then it's not the end of the line anymore */
246 if (editor->bCaretAtEnd && editor->pCursors[0].pRun == pNext)
247 editor->bCaretAtEnd = FALSE;
248 /* Update all cursors so that they don't contain the soon deleted run */
249 for (i=0; i<editor->nCursors; i++) {
250 if (editor->pCursors[i].pRun == pNext) {
251 editor->pCursors[i].pRun = p;
252 editor->pCursors[i].nOffset += ME_StrVLen(p->member.run.strText);
253 }
254 }
255
256 ME_AppendString(p->member.run.strText, pNext->member.run.strText);
257 ME_Remove(pNext);
258 ME_DestroyDisplayItem(pNext);
259 ME_UpdateRunFlags(editor, &p->member.run);
260 if(TRACE_ON(richedit))
261 {
262 TRACE("Before check after join\n");
263 ME_CheckCharOffsets(editor);
264 TRACE("After check after join\n");
265 }
266 }
267
268 /******************************************************************************
269 * ME_SplitRun
270 *
271 * Splits a run into two in a given place. It also updates the screen position
272 * and size (extent) of the newly generated runs.
273 */
274 ME_DisplayItem *ME_SplitRun(ME_WrapContext *wc, ME_DisplayItem *item, int nVChar)
275 {
276 ME_TextEditor *editor = wc->context->editor;
277 ME_DisplayItem *item2 = NULL;
278 ME_Run *run, *run2;
279 ME_Paragraph *para = &ME_GetParagraph(item)->member.para;
280
281 assert(item->member.run.nCharOfs != -1);
282 if(TRACE_ON(richedit))
283 {
284 TRACE("Before check before split\n");
285 ME_CheckCharOffsets(editor);
286 TRACE("After check before split\n");
287 }
288
289 run = &item->member.run;
290
291 TRACE("Before split: %s(%d, %d)\n", debugstr_w(run->strText->szData),
292 run->pt.x, run->pt.y);
293
294 item2 = ME_SplitRunSimple(editor, item, nVChar);
295
296 run2 = &item2->member.run;
297
298 ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run);
299 ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run2);
300
301 run2->pt.x = run->pt.x+run->nWidth;
302 run2->pt.y = run->pt.y;
303
304 if(TRACE_ON(richedit))
305 {
306 TRACE("Before check after split\n");
307 ME_CheckCharOffsets(editor);
308 TRACE("After check after split\n");
309 TRACE("After split: %s(%d, %d), %s(%d, %d)\n",
310 debugstr_w(run->strText->szData), run->pt.x, run->pt.y,
311 debugstr_w(run2->strText->szData), run2->pt.x, run2->pt.y);
312 }
313
314 return item2;
315 }
316
317 /******************************************************************************
318 * ME_SplitRunSimple
319 *
320 * Does the most basic job of splitting a run into two - it does not
321 * update the positions and extents.
322 */
323 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, int nVChar)
324 {
325 ME_Run *run = &item->member.run;
326 ME_DisplayItem *item2;
327 ME_Run *run2;
328 int i;
329 assert(nVChar > 0 && nVChar < ME_StrVLen(run->strText));
330 assert(item->type == diRun);
331 assert(!(item->member.run.nFlags & MERF_NONTEXT));
332 assert(item->member.run.nCharOfs != -1);
333
334 item2 = ME_MakeRun(run->style,
335 ME_VSplitString(run->strText, nVChar), run->nFlags&MERF_SPLITMASK);
336
337 item2->member.run.nCharOfs = item->member.run.nCharOfs+
338 ME_VPosToPos(item->member.run.strText, nVChar);
339
340 run2 = &item2->member.run;
341 ME_InsertBefore(item->next, item2);
342
343 ME_UpdateRunFlags(editor, run);
344 ME_UpdateRunFlags(editor, run2);
345 for (i=0; i<editor->nCursors; i++) {
346 if (editor->pCursors[i].pRun == item &&
347 editor->pCursors[i].nOffset >= nVChar) {
348 assert(item2->type == diRun);
349 editor->pCursors[i].pRun = item2;
350 editor->pCursors[i].nOffset -= nVChar;
351 }
352 }
353 ME_GetParagraph(item)->member.para.nFlags |= MEPF_REWRAP;
354 return item2;
355 }
356
357 /******************************************************************************
358 * ME_MakeRun
359 *
360 * A helper function to create run structures quickly.
361 */
362 ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
363 {
364 ME_DisplayItem *item = ME_MakeDI(diRun);
365 item->member.run.style = s;
366 item->member.run.ole_obj = NULL;
367 item->member.run.strText = strData;
368 item->member.run.nFlags = nFlags;
369 item->member.run.nCharOfs = -1;
370 ME_AddRefStyle(s);
371 return item;
372 }
373
374 /******************************************************************************
375 * ME_InsertRun
376 *
377 * Inserts a run at a given character position (offset).
378 */
379 ME_DisplayItem *ME_InsertRun(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem *pItem)
380 {
381 ME_Cursor tmp;
382 ME_DisplayItem *pDI;
383
384 assert(pItem->type == diRun || pItem->type == diUndoInsertRun);
385
386 ME_CursorFromCharOfs(editor, nCharOfs, &tmp);
387 pDI = ME_InsertRunAtCursor(editor, &tmp, pItem->member.run.style,
388 pItem->member.run.strText->szData,
389 pItem->member.run.strText->nLen,
390 pItem->member.run.nFlags);
391
392 return pDI;
393 }
394
395 /******************************************************************************
396 * ME_InsertRunAtCursor
397 *
398 * Inserts a new run with given style, flags and content at a given position,
399 * which is passed as a cursor structure (which consists of a run and
400 * a run-relative character offset).
401 */
402 ME_DisplayItem *
403 ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
404 const WCHAR *str, int len, int flags)
405 {
406 ME_DisplayItem *pDI;
407 ME_UndoItem *pUI;
408
409 if (cursor->nOffset) {
410 /* We're inserting at the middle of the existing run, which means that
411 * that run must be split. It isn't always necessary, but */
412 cursor->pRun = ME_SplitRunSimple(editor, cursor->pRun, cursor->nOffset);
413 cursor->nOffset = 0;
414 }
415
416 pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
417 if (pUI) {
418 pUI->nStart = (ME_GetParagraph(cursor->pRun)->member.para.nCharOfs
419 + cursor->pRun->member.run.nCharOfs);
420 pUI->nLen = len;
421 }
422
423 pDI = ME_MakeRun(style, ME_MakeStringN(str, len), flags);
424 pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
425 ME_InsertBefore(cursor->pRun, pDI);
426 TRACE("Shift length:%d\n", len);
427 ME_PropagateCharOffset(cursor->pRun, len);
428 ME_GetParagraph(cursor->pRun)->member.para.nFlags |= MEPF_REWRAP;
429 return pDI;
430 }
431
432 /******************************************************************************
433 * ME_UpdateRunFlags
434 *
435 * Determine some of run attributes given its content (style, text content).
436 * Some flags cannot be determined by this function (MERF_GRAPHICS,
437 * MERF_ENDPARA)
438 */
439 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
440 {
441 assert(run->nCharOfs != -1);
442
443 if (RUN_IS_HIDDEN(run))
444 run->nFlags |= MERF_HIDDEN;
445 else
446 run->nFlags &= ~MERF_HIDDEN;
447
448 if (ME_IsSplitable(run->strText))
449 run->nFlags |= MERF_SPLITTABLE;
450 else
451 run->nFlags &= ~MERF_SPLITTABLE;
452
453 if (!(run->nFlags & MERF_NOTEXT)) {
454 if (ME_IsWhitespaces(run->strText))
455 run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
456 else
457 {
458 run->nFlags &= ~MERF_WHITESPACE;
459
460 if (ME_IsWSpace(ME_GetCharFwd(run->strText,0)))
461 run->nFlags |= MERF_STARTWHITE;
462 else
463 run->nFlags &= ~MERF_STARTWHITE;
464
465 if (ME_IsWSpace(ME_GetCharBack(run->strText,0)))
466 run->nFlags |= MERF_ENDWHITE;
467 else
468 run->nFlags &= ~MERF_ENDWHITE;
469 }
470 }
471 else
472 run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
473 }
474
475 /******************************************************************************
476 * ME_CharFromPoint
477 *
478 * Returns a character position inside the run given a run-relative
479 * pixel horizontal position. This version rounds left (ie. if the second
480 * character is at pixel position 8, then for cx=0..7 it returns 0).
481 */
482 int ME_CharFromPoint(ME_Context *c, int cx, ME_Run *run)
483 {
484 int fit = 0;
485 HGDIOBJ hOldFont;
486 SIZE sz;
487 if (!run->strText->nLen)
488 return 0;
489
490 if (run->nFlags & (MERF_TAB | MERF_CELL))
491 {
492 if (cx < run->nWidth/2)
493 return 0;
494 return 1;
495 }
496 if (run->nFlags & MERF_GRAPHICS)
497 {
498 SIZE sz;
499 ME_GetOLEObjectSize(c, run, &sz);
500 if (cx < sz.cx)
501 return 0;
502 return 1;
503 }
504 hOldFont = ME_SelectStyleFont(c, run->style);
505
506 if (c->editor->cPasswordMask)
507 {
508 ME_String *strMasked = ME_MakeStringR(c->editor->cPasswordMask,ME_StrVLen(run->strText));
509 GetTextExtentExPointW(c->hDC, strMasked->szData, run->strText->nLen,
510 cx, &fit, NULL, &sz);
511 ME_DestroyString(strMasked);
512 }
513 else
514 {
515 GetTextExtentExPointW(c->hDC, run->strText->szData, run->strText->nLen,
516 cx, &fit, NULL, &sz);
517 }
518
519 ME_UnselectStyleFont(c, run->style, hOldFont);
520
521 return fit;
522 }
523
524 /******************************************************************************
525 * ME_CharFromPointCursor
526 *
527 * Returns a character position inside the run given a run-relative
528 * pixel horizontal position. This version rounds to the nearest character edge
529 * (ie. if the second character is at pixel position 8, then for cx=0..3
530 * it returns 0, and for cx=4..7 it returns 1).
531 *
532 * It is used for mouse click handling, for better usability (and compatibility
533 * with the native control).
534 */
535 int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
536 {
537 ME_String *strRunText;
538 /* This could point to either the run's real text, or it's masked form in a password control */
539
540 int fit = 0, fit1 = 0;
541 ME_Context c;
542 HGDIOBJ hOldFont;
543 SIZE sz, sz2, sz3;
544 if (!run->strText->nLen)
545 return 0;
546
547 if (run->nFlags & (MERF_TAB | MERF_CELL))
548 {
549 if (cx < run->nWidth/2)
550 return 0;
551 return 1;
552 }
553 ME_InitContext(&c, editor, GetDC(editor->hWnd));
554 if (run->nFlags & MERF_GRAPHICS)
555 {
556 SIZE sz;
557 ME_GetOLEObjectSize(&c, run, &sz);
558 ME_DestroyContext(&c, editor->hWnd);
559 if (cx < sz.cx/2)
560 return 0;
561 return 1;
562 }
563
564 if (editor->cPasswordMask)
565 strRunText = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(run->strText));
566 else
567 strRunText = run->strText;
568
569 hOldFont = ME_SelectStyleFont(&c, run->style);
570 GetTextExtentExPointW(c.hDC, strRunText->szData, strRunText->nLen,
571 cx, &fit, NULL, &sz);
572 if (fit != strRunText->nLen)
573 {
574 int chars = 1;
575
576 GetTextExtentPoint32W(c.hDC, strRunText->szData, fit, &sz2);
577 fit1 = ME_StrRelPos(strRunText, fit, &chars);
578 GetTextExtentPoint32W(c.hDC, strRunText->szData, fit1, &sz3);
579 if (cx >= (sz2.cx+sz3.cx)/2)
580 fit = fit1;
581 }
582
583 if (editor->cPasswordMask)
584 ME_DestroyString(strRunText);
585
586 ME_UnselectStyleFont(&c, run->style, hOldFont);
587 ME_DestroyContext(&c, editor->hWnd);
588 return fit;
589 }
590
591 /******************************************************************************
592 * ME_GetTextExtent
593 *
594 * Finds a width and a height of the text using a specified style
595 */
596 static void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s, SIZE *size)
597 {
598 HGDIOBJ hOldFont;
599 hOldFont = ME_SelectStyleFont(c, s);
600 GetTextExtentPoint32W(c->hDC, szText, nChars, size);
601 ME_UnselectStyleFont(c, s, hOldFont);
602 }
603
604 /******************************************************************************
605 * ME_PointFromChar
606 *
607 * Returns a run-relative pixel position given a run-relative character
608 * position (character offset)
609 */
610 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
611 {
612 SIZE size;
613 ME_Context c;
614 ME_String *strRunText;
615 /* This could point to either the run's real text, or it's masked form in a password control */
616
617 ME_InitContext(&c, editor, GetDC(editor->hWnd));
618 if (pRun->nFlags & MERF_GRAPHICS)
619 {
620 if (nOffset)
621 ME_GetOLEObjectSize(&c, pRun, &size);
622 ReleaseDC(editor->hWnd, c.hDC);
623 return nOffset != 0;
624 }
625
626 if (editor->cPasswordMask)
627 strRunText = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(pRun->strText));
628 else
629 strRunText = pRun->strText;
630
631 ME_GetTextExtent(&c, strRunText->szData, nOffset, pRun->style, &size);
632 ReleaseDC(editor->hWnd, c.hDC);
633 if (editor->cPasswordMask)
634 ME_DestroyString(strRunText);
635 return size.cx;
636 }
637
638 /******************************************************************************
639 * ME_GetRunSizeCommon
640 *
641 * Finds width, height, ascent and descent of a run, up to given character
642 * (nLen).
643 */
644 static SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
645 int startx, int *pAscent, int *pDescent)
646 {
647 SIZE size;
648 int nMaxLen = ME_StrVLen(run->strText);
649
650 if (nLen>nMaxLen)
651 nLen = nMaxLen;
652
653 /* FIXME the following call also ensures that TEXTMETRIC structure is filled
654 * this is wasteful for MERF_NONTEXT runs, but that shouldn't matter
655 * in practice
656 */
657
658 if (c->editor->cPasswordMask)
659 {
660 ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask,nLen);
661 ME_GetTextExtent(c, szMasked->szData, nLen,run->style, &size);
662 ME_DestroyString(szMasked);
663 }
664 else
665 {
666 ME_GetTextExtent(c, run->strText->szData, nLen, run->style, &size);
667 }
668 *pAscent = run->style->tm.tmAscent;
669 *pDescent = run->style->tm.tmDescent;
670 size.cy = *pAscent + *pDescent;
671
672 if (run->nFlags & MERF_TAB)
673 {
674 int pos = 0, i = 0, ppos;
675 PARAFORMAT2 *pFmt = para->pFmt;
676
677 do {
678 if (i < pFmt->cTabCount)
679 {
680 pos = pFmt->rgxTabs[i]&0x00FFFFFF;
681 i++;
682 }
683 else
684 {
685 pos += 720-(pos%720);
686 }
687 ppos = ME_twips2pointsX(c, pos);
688 if (ppos > startx + run->pt.x) {
689 size.cx = ppos - startx - run->pt.x;
690 break;
691 }
692 } while(1);
693 size.cy = *pAscent + *pDescent;
694 return size;
695 }
696 if (run->nFlags & MERF_GRAPHICS)
697 {
698 ME_GetOLEObjectSize(c, run, &size);
699 if (size.cy > *pAscent)
700 *pAscent = size.cy;
701 /* descent is unchanged */
702 return size;
703 }
704 if (run->nFlags & MERF_CELL)
705 {
706 size.cx = ME_twips2pointsX(c, run->pCell->nRightBoundary) - run->pt.x;
707 return size;
708 }
709 return size;
710 }
711
712 /******************************************************************************
713 * ME_GetRunSize
714 *
715 * Finds width and height (but not ascent and descent) of a part of the run
716 * up to given character.
717 */
718 SIZE ME_GetRunSize(ME_Context *c, const ME_Paragraph *para,
719 ME_Run *run, int nLen, int startx)
720 {
721 int asc, desc;
722 return ME_GetRunSizeCommon(c, para, run, nLen, startx, &asc, &desc);
723 }
724
725 /******************************************************************************
726 * ME_CalcRunExtent
727 *
728 * Updates the size of the run (fills width, ascent and descent). The height
729 * is calculated based on whole row's ascent and descent anyway, so no need
730 * to use it here.
731 */
732 void ME_CalcRunExtent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run)
733 {
734 if (run->nFlags & MERF_HIDDEN)
735 run->nWidth = 0;
736 else
737 {
738 int nEnd = ME_StrVLen(run->strText);
739 SIZE size = ME_GetRunSizeCommon(c, para, run, nEnd, startx,
740 &run->nAscent, &run->nDescent);
741 run->nWidth = size.cx;
742 if (!size.cx)
743 WARN("size.cx == 0\n");
744 }
745 }
746
747 /******************************************************************************
748 * ME_MustBeWrapped
749 *
750 * This should ensure that the given paragraph is wrapped so that its screen
751 * row structure may be used. But it doesn't, yet.
752 */
753 void ME_MustBeWrapped(ME_Context *c, ME_DisplayItem *para)
754 {
755 assert(para->type == diParagraph);
756 /* FIXME */
757 }
758
759 /******************************************************************************
760 * ME_SetSelectionCharFormat
761 *
762 * Applies a style change, either to a current selection, or to insert cursor
763 * (ie. the style next typed characters will use).
764 */
765 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
766 {
767 int nFrom, nTo;
768 ME_GetSelection(editor, &nFrom, &nTo);
769 if (nFrom == nTo)
770 {
771 ME_Style *s;
772 if (!editor->pBuffer->pCharStyle)
773 editor->pBuffer->pCharStyle = ME_GetInsertStyle(editor, 0);
774 s = ME_ApplyStyle(editor->pBuffer->pCharStyle, pFmt);
775 ME_ReleaseStyle(editor->pBuffer->pCharStyle);
776 editor->pBuffer->pCharStyle = s;
777 }
778 else
779 ME_SetCharFormat(editor, nFrom, nTo-nFrom, pFmt);
780 }
781
782 /******************************************************************************
783 * ME_SetCharFormat
784 *
785 * Applies a style change to the specified part of the text
786 */
787 void ME_SetCharFormat(ME_TextEditor *editor, int nOfs, int nChars, CHARFORMAT2W *pFmt)
788 {
789 ME_Cursor tmp, tmp2;
790 ME_DisplayItem *para;
791
792 ME_CursorFromCharOfs(editor, nOfs, &tmp);
793 if (tmp.nOffset)
794 tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
795
796 ME_CursorFromCharOfs(editor, nOfs+nChars, &tmp2);
797 if (tmp2.nOffset)
798 tmp2.pRun = ME_SplitRunSimple(editor, tmp2.pRun, tmp2.nOffset);
799
800 para = ME_GetParagraph(tmp.pRun);
801 para->member.para.nFlags |= MEPF_REWRAP;
802
803 while(tmp.pRun != tmp2.pRun)
804 {
805 ME_UndoItem *undo = NULL;
806 ME_Style *new_style = ME_ApplyStyle(tmp.pRun->member.run.style, pFmt);
807 /* ME_DumpStyle(new_style); */
808 undo = ME_AddUndoItem(editor, diUndoSetCharFormat, NULL);
809 if (undo) {
810 undo->nStart = tmp.pRun->member.run.nCharOfs+para->member.para.nCharOfs;
811 undo->nLen = tmp.pRun->member.run.strText->nLen;
812 undo->di.member.ustyle = tmp.pRun->member.run.style;
813 /* we'd have to addref undo..ustyle and release tmp...style
814 but they'd cancel each other out so we can do nothing instead */
815 }
816 else
817 ME_ReleaseStyle(tmp.pRun->member.run.style);
818 tmp.pRun->member.run.style = new_style;
819 tmp.pRun = ME_FindItemFwd(tmp.pRun, diRunOrParagraph);
820 if (tmp.pRun->type == diParagraph)
821 {
822 para = tmp.pRun;
823 tmp.pRun = ME_FindItemFwd(tmp.pRun, diRun);
824 if (tmp.pRun != tmp2.pRun)
825 para->member.para.nFlags |= MEPF_REWRAP;
826 }
827 assert(tmp.pRun);
828 }
829 }
830
831 /******************************************************************************
832 * ME_SetDefaultCharFormat
833 *
834 * Applies a style change to the default character style.
835 */
836 void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
837 {
838 ME_Style *style;
839 ME_UndoItem *undo;
840
841 assert(mod->cbSize == sizeof(CHARFORMAT2W));
842 undo = ME_AddUndoItem(editor, diUndoSetDefaultCharFormat, NULL);
843 if (undo) {
844 undo->nStart = -1;
845 undo->nLen = -1;
846 undo->di.member.ustyle = editor->pBuffer->pDefaultStyle;
847 ME_AddRefStyle(undo->di.member.ustyle);
848 }
849 style = ME_ApplyStyle(editor->pBuffer->pDefaultStyle, mod);
850 editor->pBuffer->pDefaultStyle->fmt = style->fmt;
851 editor->pBuffer->pDefaultStyle->tm = style->tm;
852 ME_ReleaseStyle(style);
853 ME_MarkAllForWrapping(editor);
854 /* pcf = editor->pBuffer->pDefaultStyle->fmt; */
855 }
856
857 static void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
858 {
859 ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
860 }
861
862 /******************************************************************************
863 * ME_GetDefaultCharFormat
864 *
865 * Retrieves the current default character style (the one applied where no
866 * other style was applied) .
867 */
868 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
869 {
870 int nFrom, nTo;
871 ME_GetSelection(editor, &nFrom, &nTo);
872 ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
873 }
874
875 /******************************************************************************
876 * ME_GetSelectionCharFormat
877 *
878 * If selection exists, it returns all style elements that are set consistently
879 * in the whole selection. If not, it just returns the current style.
880 */
881 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
882 {
883 int nFrom, nTo;
884 ME_GetSelection(editor, &nFrom, &nTo);
885 if (nFrom == nTo && editor->pBuffer->pCharStyle)
886 {
887 ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
888 return;
889 }
890 ME_GetCharFormat(editor, nFrom, nTo, pFmt);
891 }
892
893 /******************************************************************************
894 * ME_GetCharFormat
895 *
896 * Returns the style consisting of those attributes which are consistently set
897 * in the whole character range.
898 */
899 void ME_GetCharFormat(ME_TextEditor *editor, int nFrom, int nTo, CHARFORMAT2W *pFmt)
900 {
901 ME_DisplayItem *run, *run_end;
902 int nOffset, nOffset2;
903 CHARFORMAT2W tmp;
904
905 ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
906 if (nFrom == nTo) /* special case - if selection is empty, take previous char's formatting */
907 {
908 if (!nOffset)
909 {
910 ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
911 if (tmp_run->type == diRun) {
912 ME_GetRunCharFormat(editor, tmp_run, pFmt);
913 return;
914 }
915 }
916 ME_GetRunCharFormat(editor, run, pFmt);
917 return;
918 }
919
920 if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
921 nTo--;
922 ME_RunOfsFromCharOfs(editor, nTo, &run_end, &nOffset2);
923
924 ME_GetRunCharFormat(editor, run, pFmt);
925
926 if (run == run_end) return;
927
928 do {
929 /* FIXME add more style feature comparisons */
930 int nAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR | CFM_UNDERLINETYPE;
931 int nEffects = CFM_BOLD | CFM_ITALIC;
932
933 run = ME_FindItemFwd(run, diRun);
934
935 ZeroMemory(&tmp, sizeof(tmp));
936 tmp.cbSize = sizeof(tmp);
937 ME_GetRunCharFormat(editor, run, &tmp);
938
939 assert((tmp.dwMask & nAttribs) == nAttribs);
940 assert((tmp.dwMask & nEffects) == nEffects);
941 /* reset flags that differ */
942
943 if (pFmt->yHeight != tmp.yHeight)
944 pFmt->dwMask &= ~CFM_SIZE;
945 if (pFmt->dwMask & CFM_FACE)
946 {
947 if (!(tmp.dwMask & CFM_FACE))
948 pFmt->dwMask &= ~CFM_FACE;
949 else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName) ||
950 pFmt->bPitchAndFamily != tmp.bPitchAndFamily)
951 pFmt->dwMask &= ~CFM_FACE;
952 }
953 if (pFmt->yHeight != tmp.yHeight)
954 pFmt->dwMask &= ~CFM_SIZE;
955 if (pFmt->bUnderlineType != tmp.bUnderlineType)
956 pFmt->dwMask &= ~CFM_UNDERLINETYPE;
957 if (pFmt->dwMask & CFM_COLOR)
958 {
959 if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
960 {
961 if (pFmt->crTextColor != tmp.crTextColor)
962 pFmt->dwMask &= ~CFM_COLOR;
963 }
964 }
965
966 pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & nEffects);
967
968 } while(run != run_end);
969 }
970
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