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 /* Finds the run and offset from the pixel position.
893 *
894 * x & y are pixel positions in virtual coordinates into the rich edit control,
895 * so client coordinates must first be adjusted by the scroll position.
896 *
897 * returns TRUE if the result was exactly under the cursor, otherwise returns
898 * FALSE, and result is set to the closest position to the coordinates.
899 */
900 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
901 ME_Cursor *result, BOOL *is_eol)
902 {
903 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
904 ME_DisplayItem *last = NULL;
905 int rx = 0;
906 BOOL isExact = TRUE;
907
908 if (is_eol)
909 *is_eol = 0;
910
911 /* find paragraph */
912 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
913 {
914 assert(p->type == diParagraph);
915 if (y < p->member.para.pt.y + p->member.para.nHeight)
916 {
917 if (p->member.para.nFlags & MEPF_ROWSTART)
918 p = ME_FindPixelPosInTableRow(x, y, p);
919 y -= p->member.para.pt.y;
920 p = ME_FindItemFwd(p, diStartRow);
921 break;
922 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
923 p = ME_GetTableRowEnd(p);
924 }
925 }
926 /* find row */
927 for (; p != editor->pBuffer->pLast; )
928 {
929 ME_DisplayItem *pp;
930 assert(p->type == diStartRow);
931 if (y < p->member.row.pt.y + p->member.row.nHeight)
932 {
933 p = ME_FindItemFwd(p, diRun);
934 break;
935 }
936 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
937 if (pp->type != diStartRow)
938 {
939 p = ME_FindItemFwd(p, diRun);
940 break;
941 }
942 p = pp;
943 }
944 if (p == editor->pBuffer->pLast)
945 {
946 /* The position is below the last paragraph, so the last row will be used
947 * rather than the end of the text, so the x position will be used to
948 * determine the offset closest to the pixel position. */
949 isExact = FALSE;
950 p = ME_FindItemBack(p, diStartRow);
951 if (p != NULL){
952 p = ME_FindItemFwd(p, diRun);
953 }
954 else
955 {
956 p = editor->pBuffer->pLast;
957 }
958 }
959 for (; p != editor->pBuffer->pLast; p = p->next)
960 {
961 switch (p->type)
962 {
963 case diRun:
964 rx = x - p->member.run.pt.x;
965 if (rx < p->member.run.nWidth)
966 {
967 found_here:
968 assert(p->type == diRun);
969 if ((p->member.run.nFlags & MERF_ENDPARA) || rx < 0)
970 rx = 0;
971 result->pRun = p;
972 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
973 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
974 {
975 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
976 result->nOffset = 0;
977 }
978 return isExact;
979 }
980 break;
981 case diStartRow:
982 isExact = FALSE;
983 p = ME_FindItemFwd(p, diRun);
984 if (is_eol) *is_eol = 1;
985 rx = 0; /* FIXME not sure */
986 goto found_here;
987 case diCell:
988 case diParagraph:
989 case diTextEnd:
990 isExact = FALSE;
991 rx = 0; /* FIXME not sure */
992 p = last;
993 goto found_here;
994 default: assert(0);
995 }
996 last = p;
997 }
998 result->pRun = ME_FindItemBack(p, diRun);
999 result->nOffset = 0;
1000 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
1001 return FALSE;
1002 }
1003
1004
1005 /* Returns the character offset closest to the pixel position
1006 *
1007 * x & y are pixel positions in client coordinates.
1008 *
1009 * isExact will be set to TRUE if the run is directly under the pixel
1010 * position, FALSE if it not, unless isExact is set to NULL.
1011 */
1012 int ME_CharFromPos(ME_TextEditor *editor, int x, int y, BOOL *isExact)
1013 {
1014 ME_Cursor cursor;
1015 RECT rc;
1016 BOOL bResult;
1017
1018 GetClientRect(editor->hWnd, &rc);
1019 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
1020 if (isExact) *isExact = FALSE;
1021 return -1;
1022 }
1023 y += ME_GetYScrollPos(editor);
1024 bResult = ME_FindPixelPos(editor, x, y, &cursor, NULL);
1025 if (isExact) *isExact = bResult;
1026 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
1027 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
1028 }
1029
1030
1031
1032 /* Extends the selection with a word, line, or paragraph selection type.
1033 *
1034 * The selection is anchored by editor->pCursors[2-3] such that the text
1035 * between the anchors will remain selected, and one end will be extended.
1036 *
1037 * editor->pCursors[0] should have the position to extend the selection to
1038 * before this function is called.
1039 *
1040 * Nothing will be done if editor->nSelectionType equals stPosition.
1041 */
1042 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1043 {
1044 ME_Cursor tmp_cursor;
1045 int curOfs, anchorStartOfs, anchorEndOfs;
1046 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1047 return;
1048 curOfs = ME_GetCursorOfs(editor, 0);
1049 anchorStartOfs = ME_GetCursorOfs(editor, 3);
1050 anchorEndOfs = ME_GetCursorOfs(editor, 2);
1051
1052 tmp_cursor = editor->pCursors[0];
1053 editor->pCursors[0] = editor->pCursors[2];
1054 editor->pCursors[1] = editor->pCursors[3];
1055 if (curOfs < anchorStartOfs)
1056 {
1057 /* Extend the left side of selection */
1058 editor->pCursors[1] = tmp_cursor;
1059 if (editor->nSelectionType == stWord)
1060 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1061 else
1062 {
1063 ME_DisplayItem *pItem;
1064 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1065 diStartRowOrParagraph:diParagraph);
1066 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1067 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1068 editor->pCursors[1].nOffset = 0;
1069 }
1070 }
1071 else if (curOfs >= anchorEndOfs)
1072 {
1073 /* Extend the right side of selection */
1074 editor->pCursors[0] = tmp_cursor;
1075 if (editor->nSelectionType == stWord)
1076 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1077 else
1078 {
1079 ME_DisplayItem *pItem;
1080 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1081 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1082 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1083 if (pItem->type == diTextEnd)
1084 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1085 else
1086 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1087 editor->pCursors[0].nOffset = 0;
1088 }
1089 }
1090 }
1091
1092 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1093 {
1094 ME_Cursor tmp_cursor;
1095 int is_selection = 0;
1096 BOOL is_shift;
1097
1098 editor->nUDArrowX = -1;
1099
1100 y += ME_GetYScrollPos(editor);
1101
1102 tmp_cursor = editor->pCursors[0];
1103 is_selection = ME_IsSelection(editor);
1104 is_shift = GetKeyState(VK_SHIFT) < 0;
1105
1106 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1107
1108 if (x >= editor->selofs || is_shift)
1109 {
1110 if (clickNum > 1)
1111 {
1112 editor->pCursors[1] = editor->pCursors[0];
1113 if (is_shift) {
1114 if (x >= editor->selofs)
1115 ME_SelectByType(editor, stWord);
1116 else
1117 ME_SelectByType(editor, stParagraph);
1118 } else if (clickNum % 2 == 0) {
1119 ME_SelectByType(editor, stWord);
1120 } else {
1121 ME_SelectByType(editor, stParagraph);
1122 }
1123 }
1124 else if (!is_shift)
1125 {
1126 editor->nSelectionType = stPosition;
1127 editor->pCursors[1] = editor->pCursors[0];
1128 }
1129 else if (!is_selection)
1130 {
1131 editor->nSelectionType = stPosition;
1132 editor->pCursors[1] = tmp_cursor;
1133 }
1134 else if (editor->nSelectionType != stPosition)
1135 {
1136 ME_ExtendAnchorSelection(editor);
1137 }
1138 }
1139 else
1140 {
1141 if (clickNum < 2) {
1142 ME_SelectByType(editor, stLine);
1143 } else if (clickNum % 2 == 0 || is_shift) {
1144 ME_SelectByType(editor, stParagraph);
1145 } else {
1146 ME_SelectByType(editor, stDocument);
1147 }
1148 }
1149 ME_InvalidateSelection(editor);
1150 HideCaret(editor->hWnd);
1151 ME_ShowCaret(editor);
1152 ME_ClearTempStyle(editor);
1153 ME_SendSelChange(editor);
1154 }
1155
1156 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1157 {
1158 ME_Cursor tmp_cursor;
1159
1160 if (editor->nSelectionType == stDocument)
1161 return;
1162 y += ME_GetYScrollPos(editor);
1163
1164 tmp_cursor = editor->pCursors[0];
1165 /* FIXME: do something with the return value of ME_FindPixelPos */
1166 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1167
1168 ME_InvalidateSelection(editor);
1169 editor->pCursors[0] = tmp_cursor;
1170 ME_ExtendAnchorSelection(editor);
1171
1172 if (editor->nSelectionType != stPosition &&
1173 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1174 {
1175 /* The scroll the cursor towards the other end, since it was the one
1176 * extended by ME_ExtendAnchorSelection
1177 */
1178 ME_Cursor tmpCursor = editor->pCursors[0];
1179 editor->pCursors[0] = editor->pCursors[1];
1180 editor->pCursors[1] = tmpCursor;
1181 SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
1182 editor->pCursors[1] = editor->pCursors[0];
1183 editor->pCursors[0] = tmpCursor;
1184 } else {
1185 SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
1186 }
1187
1188 ME_InvalidateSelection(editor);
1189 HideCaret(editor->hWnd);
1190 ME_ShowCaret(editor);
1191 ME_SendSelChange(editor);
1192 }
1193
1194 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1195 int x, int *pOffset, int *pbCaretAtEnd)
1196 {
1197 ME_DisplayItem *pNext, *pLastRun;
1198 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1199 assert(pNext->type == diRun);
1200 pLastRun = pNext;
1201 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1202 if (pOffset) *pOffset = 0;
1203 do {
1204 int run_x = pNext->member.run.pt.x;
1205 int width = pNext->member.run.nWidth;
1206 if (x < run_x)
1207 {
1208 return pNext;
1209 }
1210 if (x >= run_x && x < run_x+width)
1211 {
1212 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1213 ME_String *s = pNext->member.run.strText;
1214 if (ch < s->nLen) {
1215 if (pOffset)
1216 *pOffset = ch;
1217 return pNext;
1218 }
1219 }
1220 pLastRun = pNext;
1221 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1222 } while(pNext && pNext->type == diRun);
1223
1224 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1225 {
1226 pNext = ME_FindItemFwd(pNext, diRun);
1227 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1228 return pNext;
1229 } else {
1230 return pLastRun;
1231 }
1232 }
1233
1234 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1235 {
1236 ME_DisplayItem *pRun = pCursor->pRun;
1237 int x;
1238
1239 if (editor->nUDArrowX != -1)
1240 x = editor->nUDArrowX;
1241 else {
1242 if (editor->bCaretAtEnd)
1243 {
1244 pRun = ME_FindItemBack(pRun, diRun);
1245 assert(pRun);
1246 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1247 }
1248 else {
1249 x = pRun->member.run.pt.x;
1250 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1251 }
1252 editor->nUDArrowX = x;
1253 }
1254 return x;
1255 }
1256
1257
1258 static void
1259 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1260 {
1261 ME_DisplayItem *pRun = pCursor->pRun;
1262 ME_DisplayItem *pItem, *pOldPara, *pNewPara;
1263 int x = ME_GetXForArrow(editor, pCursor);
1264
1265 if (editor->bCaretAtEnd && !pCursor->nOffset)
1266 pRun = ME_FindItemBack(pRun, diRun);
1267 if (!pRun)
1268 return;
1269 pOldPara = ME_GetParagraph(pRun);
1270 if (nRelOfs == -1)
1271 {
1272 /* start of this row */
1273 pItem = ME_FindItemBack(pRun, diStartRow);
1274 assert(pItem);
1275 /* start of the previous row */
1276 pItem = ME_FindItemBack(pItem, diStartRow);
1277 if (!pItem)
1278 return; /* row not found - ignore */
1279 pNewPara = ME_GetParagraph(pItem);
1280 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1281 (pOldPara->member.para.pCell &&
1282 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1283 {
1284 /* Brought out of a cell */
1285 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1286 if (pNewPara->type == diTextStart)
1287 return; /* At the top, so don't go anywhere. */
1288 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1289 }
1290 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1291 {
1292 /* Brought into a table row */
1293 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1294 while (x < cell->pt.x && cell->prev_cell)
1295 cell = &cell->prev_cell->member.cell;
1296 if (cell->next_cell) /* else - we are still at the end of the row */
1297 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1298 }
1299 }
1300 else
1301 {
1302 /* start of the next row */
1303 pItem = ME_FindItemFwd(pRun, diStartRow);
1304 if (!pItem)
1305 return; /* row not found - ignore */
1306 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
1307 */
1308 pNewPara = ME_GetParagraph(pItem);
1309 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1310 (pOldPara->member.para.pCell &&
1311 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1312 {
1313 /* Brought out of a cell */
1314 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1315 if (pNewPara->type == diTextEnd)
1316 return; /* At the bottom, so don't go anywhere. */
1317 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1318 }
1319 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1320 {
1321 /* Brought into a table row */
1322 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1323 while (cell->member.cell.next_cell &&
1324 x >= cell->member.cell.next_cell->member.cell.pt.x)
1325 cell = cell->member.cell.next_cell;
1326 pItem = ME_FindItemFwd(cell, diStartRow);
1327 }
1328 }
1329 if (!pItem)
1330 {
1331 /* row not found - ignore */
1332 return;
1333 }
1334 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1335 assert(pCursor->pRun);
1336 assert(pCursor->pRun->type == diRun);
1337 }
1338
1339
1340 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1341 {
1342 ME_DisplayItem *pRun = pCursor->pRun;
1343 ME_DisplayItem *pLast, *p;
1344 int x, y, ys, yd, yp, yprev;
1345 ME_Cursor tmp_curs = *pCursor;
1346
1347 x = ME_GetXForArrow(editor, pCursor);
1348 if (!pCursor->nOffset && editor->bCaretAtEnd)
1349 pRun = ME_FindItemBack(pRun, diRun);
1350
1351 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1352 assert(p->type == diStartRow);
1353 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1354 yprev = ys = y = yp + p->member.row.pt.y;
1355 yd = y - editor->sizeWindow.cy;
1356 pLast = p;
1357
1358 do {
1359 p = ME_FindItemBack(p, diStartRowOrParagraph);
1360 if (!p)
1361 break;
1362 if (p->type == diParagraph) { /* crossing paragraphs */
1363 if (p->member.para.prev_para == NULL)
1364 break;
1365 yp = p->member.para.prev_para->member.para.pt.y;
1366 continue;
1367 }
1368 y = yp + p->member.row.pt.y;
1369 if (y < yd)
1370 break;
1371 pLast = p;
1372 yprev = y;
1373 } while(1);
1374
1375 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1376 ME_UpdateSelection(editor, &tmp_curs);
1377 if (yprev < editor->sizeWindow.cy)
1378 {
1379 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1380 ME_Repaint(editor);
1381 }
1382 else
1383 {
1384 ME_ScrollUp(editor, ys-yprev);
1385 }
1386 assert(pCursor->pRun);
1387 assert(pCursor->pRun->type == diRun);
1388 }
1389
1390 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1391 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1392 In such a situation, clicking the scrollbar restores its position back to the
1393 normal range (ie. sets it to (doclength-screenheight)). */
1394
1395 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1396 {
1397 ME_DisplayItem *pRun = pCursor->pRun;
1398 ME_DisplayItem *pLast, *p;
1399 int x, y, ys, yd, yp, yprev;
1400 ME_Cursor tmp_curs = *pCursor;
1401
1402 x = ME_GetXForArrow(editor, pCursor);
1403 if (!pCursor->nOffset && editor->bCaretAtEnd)
1404 pRun = ME_FindItemBack(pRun, diRun);
1405
1406 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1407 assert(p->type == diStartRow);
1408 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1409 yprev = ys = y = yp + p->member.row.pt.y;
1410 yd = y + editor->sizeWindow.cy;
1411 pLast = p;
1412
1413 do {
1414 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1415 if (!p)
1416 break;
1417 if (p->type == diParagraph) {
1418 yp = p->member.para.pt.y;
1419 continue;
1420 }
1421 y = yp + p->member.row.pt.y;
1422 if (y >= yd)
1423 break;
1424 pLast = p;
1425 yprev = y;
1426 } while(1);
1427
1428 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1429 ME_UpdateSelection(editor, &tmp_curs);
1430 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1431 {
1432 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1433 ME_Repaint(editor);
1434 }
1435 else
1436 {
1437 ME_ScrollUp(editor,ys-yprev);
1438 }
1439 assert(pCursor->pRun);
1440 assert(pCursor->pRun->type == diRun);
1441 }
1442
1443 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1444 {
1445 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1446 ME_WrapMarkedParagraphs(editor);
1447 if (pRow) {
1448 ME_DisplayItem *pRun;
1449 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1450 pRow = ME_FindItemBack(pRow, diStartRow);
1451 if (!pRow)
1452 return;
1453 }
1454 pRun = ME_FindItemFwd(pRow, diRun);
1455 if (pRun) {
1456 pCursor->pRun = pRun;
1457 pCursor->nOffset = 0;
1458 }
1459 }
1460 editor->bCaretAtEnd = FALSE;
1461 }
1462
1463 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1464 {
1465 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1466 if (pRow) {
1467 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1468 if (pRun) {
1469 pCursor->pRun = pRun;
1470 pCursor->nOffset = 0;
1471 }
1472 }
1473 }
1474
1475 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1476 {
1477 ME_DisplayItem *pRow;
1478
1479 if (editor->bCaretAtEnd && !pCursor->nOffset)
1480 return;
1481
1482 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1483 assert(pRow);
1484 if (pRow->type == diStartRow) {
1485 /* FIXME WTF was I thinking about here ? */
1486 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1487 assert(pRun);
1488 pCursor->pRun = pRun;
1489 pCursor->nOffset = 0;
1490 editor->bCaretAtEnd = 1;
1491 return;
1492 }
1493 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1494 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1495 pCursor->nOffset = 0;
1496 editor->bCaretAtEnd = FALSE;
1497 }
1498
1499 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1500 {
1501 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1502 assert(p);
1503 p = ME_FindItemBack(p, diRun);
1504 assert(p);
1505 assert(p->member.run.nFlags & MERF_ENDPARA);
1506 pCursor->pRun = p;
1507 pCursor->nOffset = 0;
1508 editor->bCaretAtEnd = FALSE;
1509 }
1510
1511 BOOL ME_IsSelection(ME_TextEditor *editor)
1512 {
1513 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1514 }
1515
1516 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1517 {
1518 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1519
1520 if (cdir*dir>0)
1521 return 0;
1522 else
1523 return 1;
1524 }
1525
1526 BOOL ME_UpdateSelection(ME_TextEditor *editor, const ME_Cursor *pTempCursor)
1527 {
1528 ME_Cursor old_anchor = editor->pCursors[1];
1529
1530 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1531 {
1532 /* any selection was present ? if so, it's no more, repaint ! */
1533 editor->pCursors[1] = editor->pCursors[0];
1534 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1535 return TRUE;
1536 }
1537 return FALSE;
1538 }
1539 else
1540 {
1541 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1542 {
1543 editor->pCursors[1] = *pTempCursor;
1544 return TRUE;
1545 }
1546 }
1547
1548 ME_Repaint(editor);
1549 return TRUE;
1550 }
1551
1552 void ME_DeleteSelection(ME_TextEditor *editor)
1553 {
1554 int from, to;
1555 ME_GetSelection(editor, &from, &to);
1556 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1557 }
1558
1559 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1560 {
1561 return ME_GetInsertStyle(editor, 0);
1562 }
1563
1564 void ME_SendSelChange(ME_TextEditor *editor)
1565 {
1566 SELCHANGE sc;
1567
1568 if (!(editor->nEventMask & ENM_SELCHANGE))
1569 return;
1570
1571 sc.nmhdr.hwndFrom = editor->hWnd;
1572 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1573 sc.nmhdr.code = EN_SELCHANGE;
1574 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1575 sc.seltyp = SEL_EMPTY;
1576 if (sc.chrg.cpMin != sc.chrg.cpMax)
1577 sc.seltyp |= SEL_TEXT;
1578 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1579 sc.seltyp |= SEL_MULTICHAR;
1580 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1581 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1582 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1583 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1584 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1585 {
1586 ME_ClearTempStyle(editor);
1587
1588 editor->notified_cr = sc.chrg;
1589 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1590 }
1591 }
1592
1593 BOOL
1594 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1595 {
1596 int nCursor = 0;
1597 ME_Cursor *p = &editor->pCursors[nCursor];
1598 ME_Cursor tmp_curs = *p;
1599 BOOL success = FALSE;
1600
1601 ME_CheckCharOffsets(editor);
1602 switch(nVKey) {
1603 case VK_LEFT:
1604 editor->bCaretAtEnd = 0;
1605 if (ctrl)
1606 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1607 else
1608 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1609 break;
1610 case VK_RIGHT:
1611 editor->bCaretAtEnd = 0;
1612 if (ctrl)
1613 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1614 else
1615 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1616 break;
1617 case VK_UP:
1618 ME_MoveCursorLines(editor, &tmp_curs, -1);
1619 break;
1620 case VK_DOWN:
1621 ME_MoveCursorLines(editor, &tmp_curs, +1);
1622 break;
1623 case VK_PRIOR:
1624 ME_ArrowPageUp(editor, &tmp_curs);
1625 break;
1626 case VK_NEXT:
1627 ME_ArrowPageDown(editor, &tmp_curs);
1628 break;
1629 case VK_HOME: {
1630 if (ctrl)
1631 ME_ArrowCtrlHome(editor, &tmp_curs);
1632 else
1633 ME_ArrowHome(editor, &tmp_curs);
1634 editor->bCaretAtEnd = 0;
1635 break;
1636 }
1637 case VK_END:
1638 if (ctrl)
1639 ME_ArrowCtrlEnd(editor, &tmp_curs);
1640 else
1641 ME_ArrowEnd(editor, &tmp_curs);
1642 break;
1643 }
1644
1645 if (!extend)
1646 editor->pCursors[1] = tmp_curs;
1647 *p = tmp_curs;
1648
1649 ME_InvalidateSelection(editor);
1650 ME_Repaint(editor);
1651 HideCaret(editor->hWnd);
1652 ME_EnsureVisible(editor, tmp_curs.pRun);
1653 ME_ShowCaret(editor);
1654 ME_SendSelChange(editor);
1655 return success;
1656 }
1657
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