1 /*
2 * RichEdit - Caret and selection functions.
3 *
4 * Copyright 2004 by Krzysztof Foltman
5 * Copyright 2005 by Phil Krylov
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22
23 #include "editor.h"
24
25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
26
27 static BOOL
28 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs);
29
30 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
31 {
32 *from = ME_GetCursorOfs(editor, 0);
33 *to = ME_GetCursorOfs(editor, 1);
34
35 if (*from > *to)
36 {
37 int tmp = *from;
38 *from = *to;
39 *to = tmp;
40 }
41 }
42
43 int ME_GetTextLength(ME_TextEditor *editor)
44 {
45 return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0);
46 }
47
48
49 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
50 {
51 int length;
52
53 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
54 return E_INVALIDARG;
55 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
56 return E_INVALIDARG;
57
58 length = ME_GetTextLength(editor);
59
60 if ((GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_MULTILINE)
61 && (how->flags & GTL_USECRLF)
62 && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
63 length += editor->nParagraphs - 1;
64
65 if (how->flags & GTL_NUMBYTES)
66 {
67 CPINFO cpinfo;
68
69 if (how->codepage == 1200)
70 return length * 2;
71 if (how->flags & GTL_PRECISE)
72 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
73 if (GetCPInfo(how->codepage, &cpinfo))
74 return length * cpinfo.MaxCharSize;
75 ERR("Invalid codepage %u\n", how->codepage);
76 return E_INVALIDARG;
77 }
78 return length;
79 }
80
81
82 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
83 {
84 int selectionEnd = 0;
85 const int len = ME_GetTextLength(editor);
86
87 /* all negative values are effectively the same */
88 if (from < 0)
89 from = -1;
90 if (to < 0)
91 to = -1;
92
93 /* select all */
94 if (from == 0 && to == -1)
95 {
96 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
97 editor->pCursors[1].nOffset = 0;
98 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
99 editor->pCursors[0].nOffset = 0;
100 ME_InvalidateSelection(editor);
101 ME_ClearTempStyle(editor);
102 return len + 1;
103 }
104
105 /* if both values are equal and also out of bound, that means to */
106 /* put the selection at the end of the text */
107 if ((from == to) && (to < 0 || to > len))
108 {
109 selectionEnd = 1;
110 }
111 else
112 {
113 /* if from is negative and to is positive then selection is */
114 /* deselected and caret moved to end of the current selection */
115 if (from < 0)
116 {
117 int start, end;
118 ME_GetSelection(editor, &start, &end);
119 editor->pCursors[1] = editor->pCursors[0];
120 ME_Repaint(editor);
121 ME_ClearTempStyle(editor);
122 return end;
123 }
124
125 /* adjust to if it's a negative value */
126 if (to < 0)
127 to = len + 1;
128
129 /* flip from and to if they are reversed */
130 if (from>to)
131 {
132 int tmp = from;
133 from = to;
134 to = tmp;
135 }
136
137 /* after fiddling with the values, we find from > len && to > len */
138 if (from > len)
139 selectionEnd = 1;
140 /* special case with to too big */
141 else if (to > len)
142 to = len + 1;
143 }
144
145 if (selectionEnd)
146 {
147 editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
148 editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0;
149 ME_InvalidateSelection(editor);
150 ME_ClearTempStyle(editor);
151 return len;
152 }
153
154 ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
155 ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
156 return to;
157 }
158
159
160 void
161 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
162 int *x, int *y, int *height)
163 {
164 ME_DisplayItem *pCursorRun = pCursor->pRun;
165 ME_DisplayItem *pSizeRun = pCursor->pRun;
166
167 assert(height && x && y);
168 assert(!(ME_GetParagraph(pCursorRun)->member.para.nFlags & MEPF_REWRAP));
169 assert(pCursor->pRun);
170 assert(pCursor->pRun->type == diRun);
171
172 if (pCursorRun->type == diRun) {
173 ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
174
175 if (row) {
176 HDC hDC = GetDC(editor->hWnd);
177 ME_Context c;
178 ME_DisplayItem *run = pCursorRun;
179 ME_DisplayItem *para = NULL;
180 SIZE sz = {0, 0};
181
182 ME_InitContext(&c, editor, hDC);
183
184 if (!pCursor->nOffset)
185 {
186 ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrParagraph);
187 assert(prev);
188 if (prev->type == diRun)
189 pSizeRun = prev;
190 }
191 assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
192 para = ME_FindItemBack(row, diParagraph);
193 assert(para);
194 assert(para->type == diParagraph);
195 if (editor->bCaretAtEnd && !pCursor->nOffset &&
196 run == ME_FindItemFwd(row, diRun))
197 {
198 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
199 assert(tmp);
200 if (tmp->type == diRun)
201 {
202 row = ME_FindItemBack(tmp, diStartRow);
203 pSizeRun = run = tmp;
204 assert(run);
205 assert(run->type == diRun);
206 sz = ME_GetRunSize(&c, ¶->member.para,
207 &run->member.run, ME_StrLen(run->member.run.strText),
208 row->member.row.nLMargin);
209 }
210 }
211 if (pCursor->nOffset) {
212 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset,
213 row->member.row.nLMargin);
214 }
215
216 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
217 *x = run->member.run.pt.x + sz.cx;
218 *y = para->member.para.pt.y + row->member.row.nBaseline + run->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
219 ME_DestroyContext(&c, editor->hWnd);
220 return;
221 }
222 }
223 *height = 10; /* FIXME use global font */
224 *x = 0;
225 *y = 0;
226 }
227
228
229 void
230 ME_MoveCaret(ME_TextEditor *editor)
231 {
232 int x, y, height;
233
234 if (ME_WrapMarkedParagraphs(editor))
235 ME_UpdateScrollBar(editor);
236 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
237 if(editor->bHaveFocus && !ME_IsSelection(editor))
238 {
239 RECT rect;
240
241 GetClientRect(editor->hWnd, &rect);
242 x = min(x, rect.right-2);
243 CreateCaret(editor->hWnd, NULL, 0, height);
244 SetCaretPos(x, y);
245 }
246 }
247
248
249 void ME_ShowCaret(ME_TextEditor *ed)
250 {
251 ME_MoveCaret(ed);
252 if(ed->bHaveFocus && !ME_IsSelection(ed))
253 ShowCaret(ed->hWnd);
254 }
255
256 void ME_HideCaret(ME_TextEditor *ed)
257 {
258 if(!ed->bHaveFocus || ME_IsSelection(ed))
259 {
260 HideCaret(ed->hWnd);
261 DestroyCaret();
262 }
263 }
264
265 BOOL ME_InternalDeleteText(ME_TextEditor *editor, int nOfs, int nChars,
266 BOOL bForce)
267 {
268 ME_Cursor c;
269 int shift = 0;
270 int totalChars = nChars;
271 ME_DisplayItem *start_para;
272
273 {
274 /* Prevent deletion past last end of paragraph run. */
275 ME_DisplayItem *pTextEnd = editor->pBuffer->pLast;
276 int nMaxChars = pTextEnd->member.para.prev_para->member.para.nCharOfs;
277 nMaxChars += ME_FindItemBack(pTextEnd, diRun)->member.run.nCharOfs;
278 nMaxChars -= nOfs;
279 nChars = min(nChars, nMaxChars);
280 }
281
282 ME_CursorFromCharOfs(editor, nOfs, &c);
283 start_para = ME_GetParagraph(c.pRun);
284
285 if (!bForce)
286 {
287 ME_ProtectPartialTableDeletion(editor, nOfs, &nChars);
288 if (nChars == 0)
289 return FALSE;
290 }
291
292 while(nChars > 0)
293 {
294 ME_Run *run;
295 ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
296 if (!c.nOffset &&
297 nOfs+nChars == (c.pRun->member.run.nCharOfs
298 + ME_GetParagraph(c.pRun)->member.para.nCharOfs))
299 {
300 /* We aren't deleting anything in this run, so we will go back to the
301 * last run we are deleting text in. */
302 c.pRun = ME_FindItemBack(c.pRun, diRun);
303 if (c.pRun->member.run.nFlags & MERF_ENDPARA)
304 c.nOffset = c.pRun->member.run.nCR + c.pRun->member.run.nLF;
305 else
306 c.nOffset = c.pRun->member.run.strText->nLen;
307 }
308 run = &c.pRun->member.run;
309 if (run->nFlags & MERF_ENDPARA) {
310 int eollen = run->nCR + run->nLF;
311 BOOL keepFirstParaFormat;
312
313 if (!ME_FindItemFwd(c.pRun, diParagraph))
314 {
315 return TRUE;
316 }
317 keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
318 run->nCharOfs);
319 if (!editor->bEmulateVersion10) /* v4.1 */
320 {
321 ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
322 ME_DisplayItem *this_para = next_para->member.para.prev_para;
323
324 /* The end of paragraph before a table row is only deleted if there
325 * is nothing else on the line before it. */
326 if (this_para == start_para &&
327 next_para->member.para.nFlags & MEPF_ROWSTART)
328 {
329 /* If the paragraph will be empty, then it should be deleted, however
330 * it still might have text right now which would inherit the
331 * MEPF_STARTROW property if we joined it right now.
332 * Instead we will delete it after the preceding text is deleted. */
333 if (nOfs > this_para->member.para.nCharOfs) {
334 /* Skip this end of line. */
335 nChars -= (eollen < nChars) ? eollen : nChars;
336 continue;
337 }
338 keepFirstParaFormat = TRUE;
339 }
340 }
341 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun), keepFirstParaFormat);
342 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
343 ME_CheckCharOffsets(editor);
344 nChars -= (eollen < nChars) ? eollen : nChars;
345 continue;
346 }
347 else
348 {
349 ME_Cursor cursor;
350 int nCharsToDelete = min(nChars, c.nOffset);
351 int i;
352
353 c.nOffset -= nCharsToDelete;
354
355 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
356
357 cursor = c;
358 /* nChars is the number of characters that should be deleted from the
359 PRECEDING runs (these BEFORE cursor.pRun)
360 nCharsToDelete is a number of chars to delete from THIS run */
361 nChars -= nCharsToDelete;
362 shift -= nCharsToDelete;
363 TRACE("Deleting %d (remaning %d) chars at %d in '%s' (%d)\n",
364 nCharsToDelete, nChars, c.nOffset,
365 debugstr_w(run->strText->szData), run->strText->nLen);
366
367 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
368 {
369 /* undo = reinsert whole run */
370 /* nOfs is a character offset (from the start of the document
371 to the current (deleted) run */
372 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
373 if (pUndo)
374 pUndo->di.member.run.nCharOfs = nOfs+nChars;
375 }
376 else
377 {
378 /* undo = reinsert partial run */
379 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
380 if (pUndo) {
381 ME_DestroyString(pUndo->di.member.run.strText);
382 pUndo->di.member.run.nCharOfs = nOfs+nChars;
383 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
384 }
385 }
386 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
387 TRACE("Shift value: %d\n", shift);
388 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
389
390 /* update cursors (including c) */
391 for (i=-1; i<editor->nCursors; i++) {
392 ME_Cursor *pThisCur = editor->pCursors + i;
393 if (i == -1) pThisCur = &c;
394 if (pThisCur->pRun == cursor.pRun) {
395 if (pThisCur->nOffset > cursor.nOffset) {
396 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
397 pThisCur->nOffset = cursor.nOffset;
398 else
399 pThisCur->nOffset -= nCharsToDelete;
400 assert(pThisCur->nOffset >= 0);
401 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
402 }
403 if (pThisCur->nOffset == ME_StrVLen(run->strText))
404 {
405 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
406 assert(pThisCur->pRun->type == diRun);
407 pThisCur->nOffset = 0;
408 }
409 }
410 }
411
412 /* c = updated data now */
413
414 if (c.pRun == cursor.pRun)
415 ME_SkipAndPropagateCharOffset(c.pRun, shift);
416 else
417 ME_PropagateCharOffset(c.pRun, shift);
418
419 if (!ME_StrVLen(cursor.pRun->member.run.strText))
420 {
421 TRACE("Removing useless run\n");
422 ME_Remove(cursor.pRun);
423 ME_DestroyDisplayItem(cursor.pRun);
424 }
425
426 shift = 0;
427 /*
428 ME_CheckCharOffsets(editor);
429 */
430 continue;
431 }
432 }
433 return TRUE;
434 }
435
436 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
437 {
438 assert(nCursor>=0 && nCursor<editor->nCursors);
439 /* text operations set modified state */
440 editor->nModifyStep = 1;
441 return ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars,
442 FALSE);
443 }
444
445 static ME_DisplayItem *
446 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
447 const WCHAR *str, int len, ME_Style *style,
448 int flags)
449 {
450 ME_Cursor *p = &editor->pCursors[nCursor];
451
452 editor->bCaretAtEnd = FALSE;
453
454 assert(p->pRun->type == diRun);
455
456 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
457 }
458
459
460 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
461 {
462 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
463 ME_DisplayItem *di;
464 WCHAR space = ' ';
465
466 /* FIXME no no no */
467 if (ME_IsSelection(editor))
468 ME_DeleteSelection(editor);
469
470 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
471 MERF_GRAPHICS);
472 di->member.run.ole_obj = ALLOC_OBJ(*reo);
473 ME_CopyReObject(di->member.run.ole_obj, reo);
474 ME_SendSelChange(editor);
475 }
476
477
478 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
479 {
480 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
481 ME_DisplayItem *di;
482 WCHAR space = ' ';
483
484 /* FIXME no no no */
485 if (ME_IsSelection(editor))
486 ME_DeleteSelection(editor);
487
488 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
489 MERF_ENDROW);
490 ME_SendSelChange(editor);
491 }
492
493
494 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
495 const WCHAR *str, int len, ME_Style *style)
496 {
497 const WCHAR *pos;
498 ME_Cursor *p = NULL;
499 int oldLen;
500
501 /* FIXME really HERE ? */
502 if (ME_IsSelection(editor))
503 ME_DeleteSelection(editor);
504
505 /* FIXME: is this too slow? */
506 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
507 oldLen = ME_GetTextLength(editor);
508
509 /* text operations set modified state */
510 editor->nModifyStep = 1;
511
512 assert(style);
513
514 assert(nCursor>=0 && nCursor<editor->nCursors);
515 if (len == -1)
516 len = lstrlenW(str);
517
518 /* grow the text limit to fit our text */
519 if(editor->nTextLimit < oldLen +len)
520 editor->nTextLimit = oldLen + len;
521
522 while (len)
523 {
524 pos = str;
525 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
526 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
527 pos++;
528 if (pos-str < len && *pos == '\t') { /* handle tabs */
529 WCHAR tab = '\t';
530
531 if (pos!=str)
532 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
533
534 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
535
536 pos++;
537 if(pos-str <= len) {
538 len -= pos - str;
539 str = pos;
540 continue;
541 }
542 }
543 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
544 if (!editor->bEmulateVersion10 && pos-str < len-2 && pos[0] == '\r' && pos[1] == '\r' && pos[2] == '\n') {
545 WCHAR space = ' ';
546
547 if (pos!=str)
548 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
549
550 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
551
552 pos+=3;
553 if(pos-str <= len) {
554 len -= pos - str;
555 str = pos;
556 continue;
557 }
558 }
559 if (pos-str < len) { /* handle EOLs */
560 ME_DisplayItem *tp, *end_run;
561 ME_Style *tmp_style;
562 int numCR, numLF;
563
564 if (pos!=str)
565 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
566 p = &editor->pCursors[nCursor];
567 if (p->nOffset) {
568 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
569 p = &editor->pCursors[nCursor];
570 }
571 tmp_style = ME_GetInsertStyle(editor, nCursor);
572 /* ME_SplitParagraph increases style refcount */
573
574 /* Encode and fill number of CR and LF according to emulation mode */
575 if (editor->bEmulateVersion10) {
576 const WCHAR * tpos;
577
578 /* We have to find out how many consecutive \r are there, and if there
579 is a \n terminating the run of \r's. */
580 numCR = 0; numLF = 0;
581 tpos = pos;
582 while (tpos-str < len && *tpos == '\r') {
583 tpos++;
584 numCR++;
585 }
586 if (tpos-str >= len) {
587 /* Reached end of text without finding anything but '\r' */
588 if (tpos != pos) {
589 pos++;
590 }
591 numCR = 1; numLF = 0;
592 } else if (*tpos == '\n') {
593 /* The entire run of \r's plus the one \n is one single line break */
594 pos = tpos + 1;
595 numLF = 1;
596 } else {
597 /* Found some other content past the run of \r's */
598 pos++;
599 numCR = 1; numLF = 0;
600 }
601 } else {
602 if(pos-str < len && *pos =='\r')
603 pos++;
604 if(pos-str < len && *pos =='\n')
605 pos++;
606 numCR = 1; numLF = 0;
607 }
608 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, numCR, numLF, 0);
609 p->pRun = ME_FindItemFwd(tp, diRun);
610 end_run = ME_FindItemBack(tp, diRun);
611 ME_ReleaseStyle(end_run->member.run.style);
612 end_run->member.run.style = tmp_style;
613 p->nOffset = 0;
614
615 if(pos-str <= len) {
616 len -= pos - str;
617 str = pos;
618 continue;
619 }
620 }
621 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
622 len = 0;
623 }
624 }
625
626
627 static BOOL
628 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
629 {
630 ME_DisplayItem *pRun = pCursor->pRun;
631
632 if (nRelOfs == -1)
633 {
634 if (!pCursor->nOffset)
635 {
636 do {
637 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
638 assert(pRun);
639 switch (pRun->type)
640 {
641 case diRun:
642 break;
643 case diParagraph:
644 if (pRun->member.para.prev_para->type == diTextStart)
645 return FALSE;
646 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
647 /* every paragraph ought to have at least one run */
648 assert(pRun && pRun->type == diRun);
649 assert(pRun->member.run.nFlags & MERF_ENDPARA);
650 break;
651 default:
652 assert(pRun->type != diRun && pRun->type != diParagraph);
653 return FALSE;
654 }
655 } while (RUN_IS_HIDDEN(&pRun->member.run) ||
656 pRun->member.run.nFlags & MERF_HIDDEN);
657 pCursor->pRun = pRun;
658 if (pRun->member.run.nFlags & MERF_ENDPARA)
659 pCursor->nOffset = 0;
660 else
661 pCursor->nOffset = pRun->member.run.strText->nLen;
662 }
663
664 if (pCursor->nOffset)
665 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
666 return TRUE;
667 }
668 else
669 {
670 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
671 {
672 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
673
674 if (new_ofs < pRun->member.run.strText->nLen)
675 {
676 pCursor->nOffset = new_ofs;
677 return TRUE;
678 }
679 }
680 do {
681 pRun = ME_FindItemFwd(pRun, diRun);
682 } while (pRun && (RUN_IS_HIDDEN(&pRun->member.run) ||
683 pRun->member.run.nFlags & MERF_HIDDEN));
684 if (pRun)
685 {
686 pCursor->pRun = pRun;
687 pCursor->nOffset = 0;
688 return TRUE;
689 }
690 }
691 return FALSE;
692 }
693
694
695 static BOOL
696 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
697 {
698 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
699 int nOffset = cursor->nOffset;
700
701 if (nRelOfs == -1)
702 {
703 /* Backward movement */
704 while (TRUE)
705 {
706 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
707 nOffset, WB_MOVEWORDLEFT);
708 if (nOffset)
709 break;
710 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
711 if (pOtherRun->type == diRun)
712 {
713 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
714 pOtherRun->member.run.strText->nLen - 1,
715 WB_ISDELIMITER)
716 && !(pRun->member.run.nFlags & MERF_ENDPARA)
717 && !(cursor->pRun == pRun && cursor->nOffset == 0)
718 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
719 WB_ISDELIMITER))
720 break;
721 pRun = pOtherRun;
722 nOffset = pOtherRun->member.run.strText->nLen;
723 }
724 else if (pOtherRun->type == diParagraph)
725 {
726 if (cursor->pRun == pRun && cursor->nOffset == 0)
727 {
728 /* Skip empty start of table row paragraph */
729 if (pOtherRun->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
730 pOtherRun = pOtherRun->member.para.prev_para;
731 /* Paragraph breaks are treated as separate words */
732 if (pOtherRun->member.para.prev_para->type == diTextStart)
733 return FALSE;
734
735 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
736 }
737 break;
738 }
739 }
740 }
741 else
742 {
743 /* Forward movement */
744 BOOL last_delim = FALSE;
745
746 while (TRUE)
747 {
748 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
749 nOffset, WB_ISDELIMITER))
750 break;
751 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
752 nOffset, WB_MOVEWORDRIGHT);
753 if (nOffset < pRun->member.run.strText->nLen)
754 break;
755 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
756 if (pOtherRun->type == diRun)
757 {
758 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
759 nOffset - 1, WB_ISDELIMITER);
760 pRun = pOtherRun;
761 nOffset = 0;
762 }
763 else if (pOtherRun->type == diParagraph)
764 {
765 if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
766 pOtherRun = pOtherRun->member.para.next_para;
767 if (cursor->pRun == pRun)
768 pRun = ME_FindItemFwd(pOtherRun, diRun);
769 nOffset = 0;
770 break;
771 }
772 else /* diTextEnd */
773 {
774 if (cursor->pRun == pRun)
775 return FALSE;
776 nOffset = 0;
777 break;
778 }
779 }
780 }
781 cursor->pRun = pRun;
782 cursor->nOffset = nOffset;
783 return TRUE;
784 }
785
786
787 void
788 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
789 {
790 /* pCursor[0] is the end of the selection
791 * pCursor[1] is the start of the selection (or the position selection anchor)
792 * pCursor[2] and [3] are the selection anchors that are backed up
793 * so they are kept when the selection changes for drag selection.
794 */
795
796 editor->nSelectionType = selectionType;
797 switch(selectionType)
798 {
799 case stPosition:
800 break;
801 case stWord:
802 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
803 editor->pCursors[1] = editor->pCursors[0];
804 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
805 break;
806 case stLine:
807 case stParagraph:
808 {
809 ME_DisplayItem *pItem;
810 ME_DIType fwdSearchType, backSearchType;
811 if (selectionType == stParagraph) {
812 backSearchType = diParagraph;
813 fwdSearchType = diParagraphOrEnd;
814 } else {
815 backSearchType = diStartRow;
816 fwdSearchType = diStartRowOrParagraphOrEnd;
817 }
818 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
819 assert(pItem);
820 if (pItem->type == diTextEnd)
821 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
822 else
823 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
824 editor->pCursors[0].nOffset = 0;
825
826 pItem = ME_FindItemBack(pItem, backSearchType);
827 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
828 editor->pCursors[1].nOffset = 0;
829 break;
830 }
831 case stDocument:
832 /* Select everything with cursor anchored from the start of the text */
833 editor->nSelectionType = stDocument;
834 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
835 editor->pCursors[1].nOffset = 0;
836 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
837 editor->pCursors[0].nOffset = 0;
838 break;
839 default: assert(0);
840 }
841 /* Store the anchor positions for extending the selection. */
842 editor->pCursors[2] = editor->pCursors[0];
843 editor->pCursors[3] = editor->pCursors[1];
844 }
845
846 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
847 {
848 ME_Cursor *pCursor = &editor->pCursors[nCursor];
849 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
850 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
851 }
852
853 /* Helper function for ME_FindPixelPos to find paragraph within tables */
854 static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
855 ME_DisplayItem *para)
856 {
857 ME_DisplayItem *cell, *next_cell;
858 assert(para->member.para.nFlags & MEPF_ROWSTART);
859 cell = para->member.para.next_para->member.para.pCell;
860 assert(cell);
861
862 /* find the cell we are in */
863 while ((next_cell = cell->member.cell.next_cell) != NULL) {
864 if (x < next_cell->member.cell.pt.x)
865 {
866 para = ME_FindItemFwd(cell, diParagraph);
867 /* Found the cell, but there might be multiple paragraphs in
868 * the cell, so need to search down the cell for the paragraph. */
869 while (cell == para->member.para.pCell) {
870 if (y < para->member.para.pt.y + para->member.para.nHeight)
871 {
872 if (para->member.para.nFlags & MEPF_ROWSTART)
873 return ME_FindPixelPosInTableRow(x, y, para);
874 else
875 return para;
876 }
877 para = para->member.para.next_para;
878 }
879 /* Past the end of the cell, so go back to the last cell paragraph */
880 return para->member.para.prev_para;
881 }
882 cell = next_cell;
883 }
884 /* Return table row delimiter */
885 para = ME_FindItemFwd(cell, diParagraph);
886 assert(para->member.para.nFlags & MEPF_ROWEND);
887 assert(para->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
888 assert(para->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
889 return para;
890 }
891
892 static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found,
893 ME_Cursor *result, int rx, BOOL isExact)
894 {
895 assert(found);
896 assert(found->type == diRun);
897 if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0)
898 rx = 0;
899 result->pRun = found;
900 result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run);
901 if (editor->pCursors[0].nOffset == found->member.run.strText->nLen && rx)
902 {
903 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
904 result->nOffset = 0;
905 }
906 return isExact;
907 }
908
909 /* Finds the run and offset from the pixel position.
910 *
911 * x & y are pixel positions in virtual coordinates into the rich edit control,
912 * so client coordinates must first be adjusted by the scroll position.
913 *
914 * returns TRUE if the result was exactly under the cursor, otherwise returns
915 * FALSE, and result is set to the closest position to the coordinates.
916 */
917 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
918 ME_Cursor *result, BOOL *is_eol)
919 {
920 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
921 ME_DisplayItem *last = NULL;
922 int rx = 0;
923 BOOL isExact = TRUE;
924
925 if (is_eol)
926 *is_eol = 0;
927
928 /* find paragraph */
929 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
930 {
931 assert(p->type == diParagraph);
932 if (y < p->member.para.pt.y + p->member.para.nHeight)
933 {
934 if (p->member.para.nFlags & MEPF_ROWSTART)
935 p = ME_FindPixelPosInTableRow(x, y, p);
936 y -= p->member.para.pt.y;
937 p = ME_FindItemFwd(p, diStartRow);
938 break;
939 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
940 p = ME_GetTableRowEnd(p);
941 }
942 }
943 /* find row */
944 for (; p != editor->pBuffer->pLast; )
945 {
946 ME_DisplayItem *pp;
947 assert(p->type == diStartRow);
948 if (y < p->member.row.pt.y + p->member.row.nHeight)
949 {
950 p = ME_FindItemFwd(p, diRun);
951 break;
952 }
953 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
954 if (pp->type != diStartRow)
955 {
956 p = ME_FindItemFwd(p, diRun);
957 break;
958 }
959 p = pp;
960 }
961 if (p == editor->pBuffer->pLast)
962 {
963 /* The position is below the last paragraph, so the last row will be used
964 * rather than the end of the text, so the x position will be used to
965 * determine the offset closest to the pixel position. */
966 isExact = FALSE;
967 p = ME_FindItemBack(p, diStartRow);
968 if (p != NULL){
969 p = ME_FindItemFwd(p, diRun);
970 }
971 else
972 {
973 p = editor->pBuffer->pLast;
974 }
975 }
976 for (; p != editor->pBuffer->pLast; p = p->next)
977 {
978 switch (p->type)
979 {
980 case diRun:
981 rx = x - p->member.run.pt.x;
982 if (rx < p->member.run.nWidth)
983 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
984 break;
985 case diStartRow:
986 isExact = FALSE;
987 p = ME_FindItemFwd(p, diRun);
988 if (is_eol) *is_eol = 1;
989 rx = 0; /* FIXME not sure */
990 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
991 case diCell:
992 case diParagraph:
993 case diTextEnd:
994 isExact = FALSE;
995 rx = 0; /* FIXME not sure */
996 p = last;
997 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
998 default: assert(0);
999 }
1000 last = p;
1001 }
1002 result->pRun = ME_FindItemBack(p, diRun);
1003 result->nOffset = 0;
1004 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
1005 return FALSE;
1006 }
1007
1008
1009 /* Returns the character offset closest to the pixel position
1010 *
1011 * x & y are pixel positions in client coordinates.
1012 *
1013 * isExact will be set to TRUE if the run is directly under the pixel
1014 * position, FALSE if it not, unless isExact is set to NULL.
1015 */
1016 int ME_CharFromPos(ME_TextEditor *editor, int x, int y, BOOL *isExact)
1017 {
1018 ME_Cursor cursor;
1019 RECT rc;
1020 BOOL bResult;
1021
1022 GetClientRect(editor->hWnd, &rc);
1023 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
1024 if (isExact) *isExact = FALSE;
1025 return -1;
1026 }
1027 y += ME_GetYScrollPos(editor);
1028 bResult = ME_FindPixelPos(editor, x, y, &cursor, NULL);
1029 if (isExact) *isExact = bResult;
1030 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
1031 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
1032 }
1033
1034
1035
1036 /* Extends the selection with a word, line, or paragraph selection type.
1037 *
1038 * The selection is anchored by editor->pCursors[2-3] such that the text
1039 * between the anchors will remain selected, and one end will be extended.
1040 *
1041 * editor->pCursors[0] should have the position to extend the selection to
1042 * before this function is called.
1043 *
1044 * Nothing will be done if editor->nSelectionType equals stPosition.
1045 */
1046 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1047 {
1048 ME_Cursor tmp_cursor;
1049 int curOfs, anchorStartOfs, anchorEndOfs;
1050 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1051 return;
1052 curOfs = ME_GetCursorOfs(editor, 0);
1053 anchorStartOfs = ME_GetCursorOfs(editor, 3);
1054 anchorEndOfs = ME_GetCursorOfs(editor, 2);
1055
1056 tmp_cursor = editor->pCursors[0];
1057 editor->pCursors[0] = editor->pCursors[2];
1058 editor->pCursors[1] = editor->pCursors[3];
1059 if (curOfs < anchorStartOfs)
1060 {
1061 /* Extend the left side of selection */
1062 editor->pCursors[1] = tmp_cursor;
1063 if (editor->nSelectionType == stWord)
1064 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1065 else
1066 {
1067 ME_DisplayItem *pItem;
1068 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1069 diStartRowOrParagraph:diParagraph);
1070 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1071 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1072 editor->pCursors[1].nOffset = 0;
1073 }
1074 }
1075 else if (curOfs >= anchorEndOfs)
1076 {
1077 /* Extend the right side of selection */
1078 editor->pCursors[0] = tmp_cursor;
1079 if (editor->nSelectionType == stWord)
1080 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1081 else
1082 {
1083 ME_DisplayItem *pItem;
1084 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1085 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1086 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1087 if (pItem->type == diTextEnd)
1088 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1089 else
1090 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1091 editor->pCursors[0].nOffset = 0;
1092 }
1093 }
1094 }
1095
1096 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1097 {
1098 ME_Cursor tmp_cursor;
1099 int is_selection = 0;
1100 BOOL is_shift;
1101
1102 editor->nUDArrowX = -1;
1103
1104 y += ME_GetYScrollPos(editor);
1105
1106 tmp_cursor = editor->pCursors[0];
1107 is_selection = ME_IsSelection(editor);
1108 is_shift = GetKeyState(VK_SHIFT) < 0;
1109
1110 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1111
1112 if (x >= editor->selofs || is_shift)
1113 {
1114 if (clickNum > 1)
1115 {
1116 editor->pCursors[1] = editor->pCursors[0];
1117 if (is_shift) {
1118 if (x >= editor->selofs)
1119 ME_SelectByType(editor, stWord);
1120 else
1121 ME_SelectByType(editor, stParagraph);
1122 } else if (clickNum % 2 == 0) {
1123 ME_SelectByType(editor, stWord);
1124 } else {
1125 ME_SelectByType(editor, stParagraph);
1126 }
1127 }
1128 else if (!is_shift)
1129 {
1130 editor->nSelectionType = stPosition;
1131 editor->pCursors[1] = editor->pCursors[0];
1132 }
1133 else if (!is_selection)
1134 {
1135 editor->nSelectionType = stPosition;
1136 editor->pCursors[1] = tmp_cursor;
1137 }
1138 else if (editor->nSelectionType != stPosition)
1139 {
1140 ME_ExtendAnchorSelection(editor);
1141 }
1142 }
1143 else
1144 {
1145 if (clickNum < 2) {
1146 ME_SelectByType(editor, stLine);
1147 } else if (clickNum % 2 == 0 || is_shift) {
1148 ME_SelectByType(editor, stParagraph);
1149 } else {
1150 ME_SelectByType(editor, stDocument);
1151 }
1152 }
1153 ME_InvalidateSelection(editor);
1154 HideCaret(editor->hWnd);
1155 ME_ShowCaret(editor);
1156 ME_ClearTempStyle(editor);
1157 ME_SendSelChange(editor);
1158 }
1159
1160 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1161 {
1162 ME_Cursor tmp_cursor;
1163
1164 if (editor->nSelectionType == stDocument)
1165 return;
1166 y += ME_GetYScrollPos(editor);
1167
1168 tmp_cursor = editor->pCursors[0];
1169 /* FIXME: do something with the return value of ME_FindPixelPos */
1170 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1171
1172 ME_InvalidateSelection(editor);
1173 editor->pCursors[0] = tmp_cursor;
1174 ME_ExtendAnchorSelection(editor);
1175
1176 if (editor->nSelectionType != stPosition &&
1177 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1178 {
1179 /* The scroll the cursor towards the other end, since it was the one
1180 * extended by ME_ExtendAnchorSelection
1181 */
1182 ME_Cursor tmpCursor = editor->pCursors[0];
1183 editor->pCursors[0] = editor->pCursors[1];
1184 editor->pCursors[1] = tmpCursor;
1185 SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
1186 editor->pCursors[1] = editor->pCursors[0];
1187 editor->pCursors[0] = tmpCursor;
1188 } else {
1189 SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
1190 }
1191
1192 ME_InvalidateSelection(editor);
1193 HideCaret(editor->hWnd);
1194 ME_ShowCaret(editor);
1195 ME_SendSelChange(editor);
1196 }
1197
1198 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1199 int x, int *pOffset, int *pbCaretAtEnd)
1200 {
1201 ME_DisplayItem *pNext, *pLastRun;
1202 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1203 assert(pNext->type == diRun);
1204 pLastRun = pNext;
1205 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1206 if (pOffset) *pOffset = 0;
1207 do {
1208 int run_x = pNext->member.run.pt.x;
1209 int width = pNext->member.run.nWidth;
1210 if (x < run_x)
1211 {
1212 return pNext;
1213 }
1214 if (x >= run_x && x < run_x+width)
1215 {
1216 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1217 ME_String *s = pNext->member.run.strText;
1218 if (ch < s->nLen) {
1219 if (pOffset)
1220 *pOffset = ch;
1221 return pNext;
1222 }
1223 }
1224 pLastRun = pNext;
1225 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1226 } while(pNext && pNext->type == diRun);
1227
1228 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1229 {
1230 pNext = ME_FindItemFwd(pNext, diRun);
1231 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1232 return pNext;
1233 } else {
1234 return pLastRun;
1235 }
1236 }
1237
1238 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1239 {
1240 ME_DisplayItem *pRun = pCursor->pRun;
1241 int x;
1242
1243 if (editor->nUDArrowX != -1)
1244 x = editor->nUDArrowX;
1245 else {
1246 if (editor->bCaretAtEnd)
1247 {
1248 pRun = ME_FindItemBack(pRun, diRun);
1249 assert(pRun);
1250 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1251 }
1252 else {
1253 x = pRun->member.run.pt.x;
1254 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1255 }
1256 editor->nUDArrowX = x;
1257 }
1258 return x;
1259 }
1260
1261
1262 static void
1263 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1264 {
1265 ME_DisplayItem *pRun = pCursor->pRun;
1266 ME_DisplayItem *pItem, *pOldPara, *pNewPara;
1267 int x = ME_GetXForArrow(editor, pCursor);
1268
1269 if (editor->bCaretAtEnd && !pCursor->nOffset)
1270 pRun = ME_FindItemBack(pRun, diRun);
1271 if (!pRun)
1272 return;
1273 pOldPara = ME_GetParagraph(pRun);
1274 if (nRelOfs == -1)
1275 {
1276 /* start of this row */
1277 pItem = ME_FindItemBack(pRun, diStartRow);
1278 assert(pItem);
1279 /* start of the previous row */
1280 pItem = ME_FindItemBack(pItem, diStartRow);
1281 if (!pItem)
1282 return; /* row not found - ignore */
1283 pNewPara = ME_GetParagraph(pItem);
1284 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1285 (pOldPara->member.para.pCell &&
1286 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1287 {
1288 /* Brought out of a cell */
1289 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1290 if (pNewPara->type == diTextStart)
1291 return; /* At the top, so don't go anywhere. */
1292 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1293 }
1294 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1295 {
1296 /* Brought into a table row */
1297 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1298 while (x < cell->pt.x && cell->prev_cell)
1299 cell = &cell->prev_cell->member.cell;
1300 if (cell->next_cell) /* else - we are still at the end of the row */
1301 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1302 }
1303 }
1304 else
1305 {
1306 /* start of the next row */
1307 pItem = ME_FindItemFwd(pRun, diStartRow);
1308 if (!pItem)
1309 return; /* row not found - ignore */
1310 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
1311 */
1312 pNewPara = ME_GetParagraph(pItem);
1313 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1314 (pOldPara->member.para.pCell &&
1315 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1316 {
1317 /* Brought out of a cell */
1318 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1319 if (pNewPara->type == diTextEnd)
1320 return; /* At the bottom, so don't go anywhere. */
1321 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1322 }
1323 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1324 {
1325 /* Brought into a table row */
1326 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1327 while (cell->member.cell.next_cell &&
1328 x >= cell->member.cell.next_cell->member.cell.pt.x)
1329 cell = cell->member.cell.next_cell;
1330 pItem = ME_FindItemFwd(cell, diStartRow);
1331 }
1332 }
1333 if (!pItem)
1334 {
1335 /* row not found - ignore */
1336 return;
1337 }
1338 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1339 assert(pCursor->pRun);
1340 assert(pCursor->pRun->type == diRun);
1341 }
1342
1343
1344 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1345 {
1346 ME_DisplayItem *pRun = pCursor->pRun;
1347 ME_DisplayItem *pLast, *p;
1348 int x, y, ys, yd, yp, yprev;
1349 ME_Cursor tmp_curs = *pCursor;
1350
1351 x = ME_GetXForArrow(editor, pCursor);
1352 if (!pCursor->nOffset && editor->bCaretAtEnd)
1353 pRun = ME_FindItemBack(pRun, diRun);
1354
1355 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1356 assert(p->type == diStartRow);
1357 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1358 yprev = ys = y = yp + p->member.row.pt.y;
1359 yd = y - editor->sizeWindow.cy;
1360 pLast = p;
1361
1362 do {
1363 p = ME_FindItemBack(p, diStartRowOrParagraph);
1364 if (!p)
1365 break;
1366 if (p->type == diParagraph) { /* crossing paragraphs */
1367 if (p->member.para.prev_para == NULL)
1368 break;
1369 yp = p->member.para.prev_para->member.para.pt.y;
1370 continue;
1371 }
1372 y = yp + p->member.row.pt.y;
1373 if (y < yd)
1374 break;
1375 pLast = p;
1376 yprev = y;
1377 } while(1);
1378
1379 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1380 ME_UpdateSelection(editor, &tmp_curs);
1381 if (yprev < editor->sizeWindow.cy)
1382 {
1383 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1384 ME_Repaint(editor);
1385 }
1386 else
1387 {
1388 ME_ScrollUp(editor, ys-yprev);
1389 }
1390 assert(pCursor->pRun);
1391 assert(pCursor->pRun->type == diRun);
1392 }
1393
1394 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1395 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1396 In such a situation, clicking the scrollbar restores its position back to the
1397 normal range (ie. sets it to (doclength-screenheight)). */
1398
1399 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1400 {
1401 ME_DisplayItem *pRun = pCursor->pRun;
1402 ME_DisplayItem *pLast, *p;
1403 int x, y, ys, yd, yp, yprev;
1404 ME_Cursor tmp_curs = *pCursor;
1405
1406 x = ME_GetXForArrow(editor, pCursor);
1407 if (!pCursor->nOffset && editor->bCaretAtEnd)
1408 pRun = ME_FindItemBack(pRun, diRun);
1409
1410 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1411 assert(p->type == diStartRow);
1412 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1413 yprev = ys = y = yp + p->member.row.pt.y;
1414 yd = y + editor->sizeWindow.cy;
1415 pLast = p;
1416
1417 do {
1418 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1419 if (!p)
1420 break;
1421 if (p->type == diParagraph) {
1422 yp = p->member.para.pt.y;
1423 continue;
1424 }
1425 y = yp + p->member.row.pt.y;
1426 if (y >= yd)
1427 break;
1428 pLast = p;
1429 yprev = y;
1430 } while(1);
1431
1432 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1433 ME_UpdateSelection(editor, &tmp_curs);
1434 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1435 {
1436 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1437 ME_Repaint(editor);
1438 }
1439 else
1440 {
1441 ME_ScrollUp(editor,ys-yprev);
1442 }
1443 assert(pCursor->pRun);
1444 assert(pCursor->pRun->type == diRun);
1445 }
1446
1447 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1448 {
1449 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1450 ME_WrapMarkedParagraphs(editor);
1451 if (pRow) {
1452 ME_DisplayItem *pRun;
1453 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1454 pRow = ME_FindItemBack(pRow, diStartRow);
1455 if (!pRow)
1456 return;
1457 }
1458 pRun = ME_FindItemFwd(pRow, diRun);
1459 if (pRun) {
1460 pCursor->pRun = pRun;
1461 pCursor->nOffset = 0;
1462 }
1463 }
1464 editor->bCaretAtEnd = FALSE;
1465 }
1466
1467 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1468 {
1469 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1470 if (pRow) {
1471 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1472 if (pRun) {
1473 pCursor->pRun = pRun;
1474 pCursor->nOffset = 0;
1475 }
1476 }
1477 }
1478
1479 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1480 {
1481 ME_DisplayItem *pRow;
1482
1483 if (editor->bCaretAtEnd && !pCursor->nOffset)
1484 return;
1485
1486 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1487 assert(pRow);
1488 if (pRow->type == diStartRow) {
1489 /* FIXME WTF was I thinking about here ? */
1490 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1491 assert(pRun);
1492 pCursor->pRun = pRun;
1493 pCursor->nOffset = 0;
1494 editor->bCaretAtEnd = 1;
1495 return;
1496 }
1497 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1498 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1499 pCursor->nOffset = 0;
1500 editor->bCaretAtEnd = FALSE;
1501 }
1502
1503 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1504 {
1505 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1506 assert(p);
1507 p = ME_FindItemBack(p, diRun);
1508 assert(p);
1509 assert(p->member.run.nFlags & MERF_ENDPARA);
1510 pCursor->pRun = p;
1511 pCursor->nOffset = 0;
1512 editor->bCaretAtEnd = FALSE;
1513 }
1514
1515 BOOL ME_IsSelection(ME_TextEditor *editor)
1516 {
1517 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1518 }
1519
1520 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1521 {
1522 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1523
1524 if (cdir*dir>0)
1525 return 0;
1526 else
1527 return 1;
1528 }
1529
1530 BOOL ME_UpdateSelection(ME_TextEditor *editor, const ME_Cursor *pTempCursor)
1531 {
1532 ME_Cursor old_anchor = editor->pCursors[1];
1533
1534 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1535 {
1536 /* any selection was present ? if so, it's no more, repaint ! */
1537 editor->pCursors[1] = editor->pCursors[0];
1538 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1539 return TRUE;
1540 }
1541 return FALSE;
1542 }
1543 else
1544 {
1545 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1546 {
1547 editor->pCursors[1] = *pTempCursor;
1548 return TRUE;
1549 }
1550 }
1551
1552 ME_Repaint(editor);
1553 return TRUE;
1554 }
1555
1556 void ME_DeleteSelection(ME_TextEditor *editor)
1557 {
1558 int from, to;
1559 ME_GetSelection(editor, &from, &to);
1560 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1561 }
1562
1563 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1564 {
1565 return ME_GetInsertStyle(editor, 0);
1566 }
1567
1568 void ME_SendSelChange(ME_TextEditor *editor)
1569 {
1570 SELCHANGE sc;
1571
1572 if (!(editor->nEventMask & ENM_SELCHANGE))
1573 return;
1574
1575 sc.nmhdr.hwndFrom = editor->hWnd;
1576 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1577 sc.nmhdr.code = EN_SELCHANGE;
1578 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1579 sc.seltyp = SEL_EMPTY;
1580 if (sc.chrg.cpMin != sc.chrg.cpMax)
1581 sc.seltyp |= SEL_TEXT;
1582 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1583 sc.seltyp |= SEL_MULTICHAR;
1584 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1585 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1586 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1587 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1588 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1589 {
1590 ME_ClearTempStyle(editor);
1591
1592 editor->notified_cr = sc.chrg;
1593 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1594 }
1595 }
1596
1597 BOOL
1598 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1599 {
1600 int nCursor = 0;
1601 ME_Cursor *p = &editor->pCursors[nCursor];
1602 ME_Cursor tmp_curs = *p;
1603 BOOL success = FALSE;
1604
1605 ME_CheckCharOffsets(editor);
1606 switch(nVKey) {
1607 case VK_LEFT:
1608 editor->bCaretAtEnd = 0;
1609 if (ctrl)
1610 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1611 else
1612 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1613 break;
1614 case VK_RIGHT:
1615 editor->bCaretAtEnd = 0;
1616 if (ctrl)
1617 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1618 else
1619 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1620 break;
1621 case VK_UP:
1622 ME_MoveCursorLines(editor, &tmp_curs, -1);
1623 break;
1624 case VK_DOWN:
1625 ME_MoveCursorLines(editor, &tmp_curs, +1);
1626 break;
1627 case VK_PRIOR:
1628 ME_ArrowPageUp(editor, &tmp_curs);
1629 break;
1630 case VK_NEXT:
1631 ME_ArrowPageDown(editor, &tmp_curs);
1632 break;
1633 case VK_HOME: {
1634 if (ctrl)
1635 ME_ArrowCtrlHome(editor, &tmp_curs);
1636 else
1637 ME_ArrowHome(editor, &tmp_curs);
1638 editor->bCaretAtEnd = 0;
1639 break;
1640 }
1641 case VK_END:
1642 if (ctrl)
1643 ME_ArrowCtrlEnd(editor, &tmp_curs);
1644 else
1645 ME_ArrowEnd(editor, &tmp_curs);
1646 break;
1647 }
1648
1649 if (!extend)
1650 editor->pCursors[1] = tmp_curs;
1651 *p = tmp_curs;
1652
1653 ME_InvalidateSelection(editor);
1654 ME_Repaint(editor);
1655 HideCaret(editor->hWnd);
1656 ME_EnsureVisible(editor, tmp_curs.pRun);
1657 ME_ShowCaret(editor);
1658 ME_SendSelChange(editor);
1659 return success;
1660 }
1661
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