bcrypt: Implement BCryptGenerateSymmetricKey and BCryptDestroyKey.
[wine.git] / dlls / riched20 / caret.c
blob26af743518fbde6c748b6557f5a4f61aa4e638ab
1 /*
2 * RichEdit - Caret and selection functions.
4 * Copyright 2004 by Krzysztof Foltman
5 * Copyright 2005 by Phil Krylov
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.
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.
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
23 #include "editor.h"
25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
27 void ME_SetCursorToStart(ME_TextEditor *editor, ME_Cursor *cursor)
29 cursor->pPara = editor->pBuffer->pFirst->member.para.next_para;
30 cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
31 cursor->nOffset = 0;
34 static void ME_SetCursorToEnd(ME_TextEditor *editor, ME_Cursor *cursor, BOOL final_eop)
36 cursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
37 cursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
38 cursor->nOffset = final_eop ? cursor->pRun->member.run.len : 0;
42 int ME_GetSelectionOfs(ME_TextEditor *editor, int *from, int *to)
44 *from = ME_GetCursorOfs(&editor->pCursors[0]);
45 *to = ME_GetCursorOfs(&editor->pCursors[1]);
47 if (*from > *to)
49 int tmp = *from;
50 *from = *to;
51 *to = tmp;
52 return 1;
54 return 0;
57 int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to)
59 int from_ofs = ME_GetCursorOfs( &editor->pCursors[0] );
60 int to_ofs = ME_GetCursorOfs( &editor->pCursors[1] );
61 BOOL swap = (from_ofs > to_ofs);
63 if (from_ofs == to_ofs)
65 /* If cursor[0] is at the beginning of a run and cursor[1] at the end
66 of the prev run then we need to swap. */
67 if (editor->pCursors[0].nOffset < editor->pCursors[1].nOffset)
68 swap = TRUE;
71 if (!swap)
73 *from = &editor->pCursors[0];
74 *to = &editor->pCursors[1];
75 return 0;
76 } else {
77 *from = &editor->pCursors[1];
78 *to = &editor->pCursors[0];
79 return 1;
83 int ME_GetTextLength(ME_TextEditor *editor)
85 ME_Cursor cursor;
86 ME_SetCursorToEnd(editor, &cursor, FALSE);
87 return ME_GetCursorOfs(&cursor);
91 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
93 int length;
95 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
96 return E_INVALIDARG;
97 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
98 return E_INVALIDARG;
100 length = ME_GetTextLength(editor);
102 if ((editor->styleFlags & ES_MULTILINE)
103 && (how->flags & GTL_USECRLF)
104 && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
105 length += editor->nParagraphs - 1;
107 if (how->flags & GTL_NUMBYTES ||
108 (how->flags & GTL_PRECISE && /* GTL_PRECISE seems to imply GTL_NUMBYTES */
109 !(how->flags & GTL_NUMCHARS))) /* unless GTL_NUMCHARS is given */
111 CPINFO cpinfo;
113 if (how->codepage == 1200)
114 return length * 2;
115 if (how->flags & GTL_PRECISE)
116 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
117 if (GetCPInfo(how->codepage, &cpinfo))
118 return length * cpinfo.MaxCharSize;
119 ERR("Invalid codepage %u\n", how->codepage);
120 return E_INVALIDARG;
122 return length;
126 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
128 int selectionEnd = 0;
129 const int len = ME_GetTextLength(editor);
131 /* all negative values are effectively the same */
132 if (from < 0)
133 from = -1;
134 if (to < 0)
135 to = -1;
137 /* select all */
138 if (from == 0 && to == -1)
140 ME_SetCursorToStart(editor, &editor->pCursors[1]);
141 ME_SetCursorToEnd(editor, &editor->pCursors[0], TRUE);
142 ME_InvalidateSelection(editor);
143 return len + 1;
146 /* if both values are equal and also out of bound, that means to */
147 /* put the selection at the end of the text */
148 if ((from == to) && (to < 0 || to > len))
150 selectionEnd = 1;
152 else
154 /* if from is negative and to is positive then selection is */
155 /* deselected and caret moved to end of the current selection */
156 if (from < 0)
158 int start, end;
159 ME_GetSelectionOfs(editor, &start, &end);
160 if (start != end)
162 if (end > len)
164 editor->pCursors[0].nOffset = 0;
165 end --;
167 editor->pCursors[1] = editor->pCursors[0];
168 ME_Repaint(editor);
170 return end;
173 /* adjust to if it's a negative value */
174 if (to < 0)
175 to = len + 1;
177 /* flip from and to if they are reversed */
178 if (from>to)
180 int tmp = from;
181 from = to;
182 to = tmp;
185 /* after fiddling with the values, we find from > len && to > len */
186 if (from > len)
187 selectionEnd = 1;
188 /* special case with to too big */
189 else if (to > len)
190 to = len + 1;
193 if (selectionEnd)
195 ME_SetCursorToEnd(editor, &editor->pCursors[0], FALSE);
196 editor->pCursors[1] = editor->pCursors[0];
197 ME_InvalidateSelection(editor);
198 return len;
201 ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]);
202 editor->pCursors[0] = editor->pCursors[1];
203 ME_MoveCursorChars(editor, &editor->pCursors[0], to - from, FALSE);
204 /* Selection is not allowed in the middle of an end paragraph run. */
205 if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA)
206 editor->pCursors[1].nOffset = 0;
207 if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA)
209 if (to > len)
210 editor->pCursors[0].nOffset = editor->pCursors[0].pRun->member.run.len;
211 else
212 editor->pCursors[0].nOffset = 0;
214 return to;
218 void ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
219 int *x, int *y, int *height)
221 ME_DisplayItem *row;
222 ME_DisplayItem *run = pCursor->pRun;
223 ME_DisplayItem *para = pCursor->pPara;
224 ME_DisplayItem *pSizeRun = run;
225 ME_Context c;
226 int run_x;
228 assert(height && x && y);
229 assert(~para->member.para.nFlags & MEPF_REWRAP);
230 assert(run && run->type == diRun);
231 assert(para && para->type == diParagraph);
233 row = ME_FindItemBack(run, diStartRowOrParagraph);
234 assert(row && row->type == diStartRow);
236 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
238 if (!pCursor->nOffset)
240 ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph);
241 assert(prev);
242 if (prev->type == diRun)
243 pSizeRun = prev;
245 if (editor->bCaretAtEnd && !pCursor->nOffset &&
246 run == ME_FindItemFwd(row, diRun))
248 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
249 assert(tmp);
250 if (tmp->type == diRun)
252 row = ME_FindItemBack(tmp, diStartRow);
253 pSizeRun = run = tmp;
254 assert(run);
255 assert(run->type == diRun);
258 run_x = ME_PointFromCharContext( &c, &run->member.run, pCursor->nOffset, TRUE );
260 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
261 *x = c.rcView.left + run->member.run.pt.x + run_x - editor->horz_si.nPos;
262 *y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline
263 + run->member.run.pt.y - pSizeRun->member.run.nAscent
264 - editor->vert_si.nPos;
265 ME_DestroyContext(&c);
266 return;
270 void
271 ME_MoveCaret(ME_TextEditor *editor)
273 int x, y, height;
275 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
276 if(editor->bHaveFocus && !ME_IsSelection(editor))
278 x = min(x, editor->rcFormat.right-1);
279 ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height);
280 ITextHost_TxSetCaretPos(editor->texthost, x, y);
285 void ME_ShowCaret(ME_TextEditor *ed)
287 ME_MoveCaret(ed);
288 if(ed->bHaveFocus && !ME_IsSelection(ed))
289 ITextHost_TxShowCaret(ed->texthost, TRUE);
292 void ME_HideCaret(ME_TextEditor *ed)
294 if(!ed->bHaveFocus || ME_IsSelection(ed))
296 ITextHost_TxShowCaret(ed->texthost, FALSE);
297 DestroyCaret();
301 BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start,
302 int nChars, BOOL bForce)
304 ME_Cursor c = *start;
305 int nOfs = ME_GetCursorOfs(start), text_len = ME_GetTextLength( editor );
306 int shift = 0;
307 int totalChars = nChars;
308 ME_DisplayItem *start_para;
309 BOOL delete_all = FALSE;
311 /* Prevent deletion past last end of paragraph run. */
312 nChars = min(nChars, text_len - nOfs);
313 if (nChars == text_len) delete_all = TRUE;
314 start_para = c.pPara;
316 if (!bForce)
318 ME_ProtectPartialTableDeletion(editor, &c, &nChars);
319 if (nChars == 0)
320 return FALSE;
323 while(nChars > 0)
325 ME_Run *run;
326 ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
327 if (!c.nOffset &&
328 nOfs+nChars == (c.pRun->member.run.nCharOfs
329 + c.pPara->member.para.nCharOfs))
331 /* We aren't deleting anything in this run, so we will go back to the
332 * last run we are deleting text in. */
333 ME_PrevRun(&c.pPara, &c.pRun, TRUE);
334 c.nOffset = c.pRun->member.run.len;
336 run = &c.pRun->member.run;
337 if (run->nFlags & MERF_ENDPARA) {
338 int eollen = c.pRun->member.run.len;
339 BOOL keepFirstParaFormat;
341 if (!ME_FindItemFwd(c.pRun, diParagraph))
343 return TRUE;
345 keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
346 run->nCharOfs);
347 if (!editor->bEmulateVersion10) /* v4.1 */
349 ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
350 ME_DisplayItem *this_para = next_para->member.para.prev_para;
352 /* The end of paragraph before a table row is only deleted if there
353 * is nothing else on the line before it. */
354 if (this_para == start_para &&
355 next_para->member.para.nFlags & MEPF_ROWSTART)
357 /* If the paragraph will be empty, then it should be deleted, however
358 * it still might have text right now which would inherit the
359 * MEPF_STARTROW property if we joined it right now.
360 * Instead we will delete it after the preceding text is deleted. */
361 if (nOfs > this_para->member.para.nCharOfs) {
362 /* Skip this end of line. */
363 nChars -= (eollen < nChars) ? eollen : nChars;
364 continue;
366 keepFirstParaFormat = TRUE;
369 ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat);
370 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
371 ME_CheckCharOffsets(editor);
372 nChars -= (eollen < nChars) ? eollen : nChars;
373 continue;
375 else
377 ME_Cursor cursor;
378 int nCharsToDelete = min(nChars, c.nOffset);
379 int i;
381 c.nOffset -= nCharsToDelete;
383 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
385 cursor = c;
386 /* nChars is the number of characters that should be deleted from the
387 PRECEDING runs (these BEFORE cursor.pRun)
388 nCharsToDelete is a number of chars to delete from THIS run */
389 nChars -= nCharsToDelete;
390 shift -= nCharsToDelete;
391 TRACE("Deleting %d (remaining %d) chars at %d in %s (%d)\n",
392 nCharsToDelete, nChars, c.nOffset,
393 debugstr_run( run ), run->len);
395 /* nOfs is a character offset (from the start of the document
396 to the current (deleted) run */
397 add_undo_insert_run( editor, nOfs + nChars, get_text( run, c.nOffset ), nCharsToDelete, run->nFlags, run->style );
399 ME_StrDeleteV(run->para->text, run->nCharOfs + c.nOffset, nCharsToDelete);
400 run->len -= nCharsToDelete;
401 TRACE("Post deletion string: %s (%d)\n", debugstr_run( run ), run->len);
402 TRACE("Shift value: %d\n", shift);
404 /* update cursors (including c) */
405 for (i=-1; i<editor->nCursors; i++) {
406 ME_Cursor *pThisCur = editor->pCursors + i;
407 if (i == -1) pThisCur = &c;
408 if (pThisCur->pRun == cursor.pRun) {
409 if (pThisCur->nOffset > cursor.nOffset) {
410 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
411 pThisCur->nOffset = cursor.nOffset;
412 else
413 pThisCur->nOffset -= nCharsToDelete;
414 assert(pThisCur->nOffset >= 0);
415 assert(pThisCur->nOffset <= run->len);
417 if (pThisCur->nOffset == run->len)
419 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
420 assert(pThisCur->pRun->type == diRun);
421 pThisCur->nOffset = 0;
426 /* c = updated data now */
428 if (c.pRun == cursor.pRun)
429 ME_SkipAndPropagateCharOffset(c.pRun, shift);
430 else
431 ME_PropagateCharOffset(c.pRun, shift);
433 if (!cursor.pRun->member.run.len)
435 TRACE("Removing empty run\n");
436 ME_Remove(cursor.pRun);
437 ME_DestroyDisplayItem(cursor.pRun);
440 shift = 0;
442 ME_CheckCharOffsets(editor);
444 continue;
447 if (delete_all) ME_SetDefaultParaFormat( editor, &start_para->member.para.fmt );
448 return TRUE;
451 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
453 assert(nCursor>=0 && nCursor<editor->nCursors);
454 /* text operations set modified state */
455 editor->nModifyStep = 1;
456 return ME_InternalDeleteText(editor, &editor->pCursors[nCursor],
457 nChars, FALSE);
460 static ME_DisplayItem *
461 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
462 const WCHAR *str, int len, ME_Style *style,
463 int flags)
465 ME_Cursor *p = &editor->pCursors[nCursor];
467 editor->bCaretAtEnd = FALSE;
469 assert(p->pRun->type == diRun);
471 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
475 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
477 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
478 ME_DisplayItem *di;
479 WCHAR space = ' ';
481 /* FIXME no no no */
482 if (ME_IsSelection(editor))
483 ME_DeleteSelection(editor);
485 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
486 MERF_GRAPHICS);
487 di->member.run.ole_obj = ALLOC_OBJ(*reo);
488 ME_CopyReObject(di->member.run.ole_obj, reo);
489 ME_ReleaseStyle(pStyle);
493 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
495 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
496 WCHAR space = ' ';
498 /* FIXME no no no */
499 if (ME_IsSelection(editor))
500 ME_DeleteSelection(editor);
502 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
503 MERF_ENDROW);
504 ME_ReleaseStyle(pStyle);
508 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
509 const WCHAR *str, int len, ME_Style *style)
511 const WCHAR *pos;
512 ME_Cursor *p = NULL;
513 int oldLen;
515 /* FIXME really HERE ? */
516 if (ME_IsSelection(editor))
517 ME_DeleteSelection(editor);
519 /* FIXME: is this too slow? */
520 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
521 oldLen = ME_GetTextLength(editor);
523 /* text operations set modified state */
524 editor->nModifyStep = 1;
526 assert(style);
528 assert(nCursor>=0 && nCursor<editor->nCursors);
529 if (len == -1)
530 len = lstrlenW(str);
532 /* grow the text limit to fit our text */
533 if(editor->nTextLimit < oldLen +len)
534 editor->nTextLimit = oldLen + len;
536 pos = str;
538 while (len)
540 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
541 while(pos - str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
542 pos++;
544 if (pos != str) { /* handle text */
545 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
546 } else if (*pos == '\t') { /* handle tabs */
547 WCHAR tab = '\t';
548 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
549 pos++;
550 } else { /* handle EOLs */
551 ME_DisplayItem *tp, *end_run, *run, *prev;
552 int eol_len = 0;
554 /* Find number of CR and LF in end of paragraph run */
555 if (*pos =='\r')
557 if (len > 1 && pos[1] == '\n')
558 eol_len = 2;
559 else if (len > 2 && pos[1] == '\r' && pos[2] == '\n')
560 eol_len = 3;
561 else
562 eol_len = 1;
563 } else {
564 assert(*pos == '\n');
565 eol_len = 1;
567 pos += eol_len;
569 if (!editor->bEmulateVersion10 && eol_len == 3)
571 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
572 WCHAR space = ' ';
573 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
574 } else {
575 const WCHAR cr = '\r', *eol_str = str;
577 if (!editor->bEmulateVersion10)
579 eol_str = &cr;
580 eol_len = 1;
583 p = &editor->pCursors[nCursor];
585 if (p->nOffset == p->pRun->member.run.len)
587 run = ME_FindItemFwd( p->pRun, diRun );
588 if (!run) run = p->pRun;
590 else
592 if (p->nOffset) ME_SplitRunSimple(editor, p);
593 run = p->pRun;
596 tp = ME_SplitParagraph(editor, run, style, eol_str, eol_len, 0);
598 end_run = ME_FindItemBack(tp, diRun);
600 /* Move any cursors that were at the end of the previous run to the beginning of the new para */
601 prev = ME_FindItemBack( end_run, diRun );
602 if (prev)
604 int i;
605 for (i = 0; i < editor->nCursors; i++)
607 if (editor->pCursors[i].pRun == prev &&
608 editor->pCursors[i].nOffset == prev->member.run.len)
610 editor->pCursors[i].pPara = tp;
611 editor->pCursors[i].pRun = run;
612 editor->pCursors[i].nOffset = 0;
619 len -= pos - str;
620 str = pos;
624 /* Move the cursor nRelOfs characters (either forwards or backwards)
625 * If final_eop is TRUE, allow moving the cursor to the end of the final eop.
627 * returns the actual number of characters moved.
629 int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs, BOOL final_eop)
631 cursor->nOffset += nRelOfs;
632 if (cursor->nOffset < 0)
634 cursor->nOffset += cursor->pRun->member.run.nCharOfs;
635 if (cursor->nOffset >= 0)
637 /* new offset in the same paragraph */
638 do {
639 cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
640 } while (cursor->nOffset < cursor->pRun->member.run.nCharOfs);
641 cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
642 return nRelOfs;
645 cursor->nOffset += cursor->pPara->member.para.nCharOfs;
646 if (cursor->nOffset <= 0)
648 /* moved to the start of the text */
649 nRelOfs -= cursor->nOffset;
650 ME_SetCursorToStart(editor, cursor);
651 return nRelOfs;
654 /* new offset in a previous paragraph */
655 do {
656 cursor->pPara = cursor->pPara->member.para.prev_para;
657 } while (cursor->nOffset < cursor->pPara->member.para.nCharOfs);
658 cursor->nOffset -= cursor->pPara->member.para.nCharOfs;
660 cursor->pRun = ME_FindItemBack(cursor->pPara->member.para.next_para, diRun);
661 while (cursor->nOffset < cursor->pRun->member.run.nCharOfs) {
662 cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
664 cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
665 } else if (cursor->nOffset >= cursor->pRun->member.run.len) {
666 ME_DisplayItem *next_para;
667 int new_offset;
669 new_offset = ME_GetCursorOfs(cursor);
670 next_para = cursor->pPara->member.para.next_para;
671 if (new_offset < next_para->member.para.nCharOfs)
673 /* new offset in the same paragraph */
674 do {
675 cursor->nOffset -= cursor->pRun->member.run.len;
676 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
677 } while (cursor->nOffset >= cursor->pRun->member.run.len);
678 return nRelOfs;
681 if (new_offset >= ME_GetTextLength(editor) + (final_eop ? 1 : 0))
683 /* new offset at the end of the text */
684 ME_SetCursorToEnd(editor, cursor, final_eop);
685 nRelOfs -= new_offset - (ME_GetTextLength(editor) + (final_eop ? 1 : 0));
686 return nRelOfs;
689 /* new offset in a following paragraph */
690 do {
691 cursor->pPara = next_para;
692 next_para = next_para->member.para.next_para;
693 } while (new_offset >= next_para->member.para.nCharOfs);
695 cursor->nOffset = new_offset - cursor->pPara->member.para.nCharOfs;
696 cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
697 while (cursor->nOffset >= cursor->pRun->member.run.len)
699 cursor->nOffset -= cursor->pRun->member.run.len;
700 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
702 } /* else new offset is in the same run */
703 return nRelOfs;
707 BOOL
708 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
710 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
711 ME_DisplayItem *pPara = cursor->pPara;
712 int nOffset = cursor->nOffset;
714 if (nRelOfs == -1)
716 /* Backward movement */
717 while (TRUE)
719 nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
720 pRun->member.run.len, nOffset, WB_MOVEWORDLEFT);
721 if (nOffset)
722 break;
723 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
724 if (pOtherRun->type == diRun)
726 if (ME_CallWordBreakProc(editor, get_text( &pOtherRun->member.run, 0 ),
727 pOtherRun->member.run.len,
728 pOtherRun->member.run.len - 1,
729 WB_ISDELIMITER)
730 && !(pRun->member.run.nFlags & MERF_ENDPARA)
731 && !(cursor->pRun == pRun && cursor->nOffset == 0)
732 && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
733 pRun->member.run.len, 0,
734 WB_ISDELIMITER))
735 break;
736 pRun = pOtherRun;
737 nOffset = pOtherRun->member.run.len;
739 else if (pOtherRun->type == diParagraph)
741 if (cursor->pRun == pRun && cursor->nOffset == 0)
743 pPara = pOtherRun;
744 /* Skip empty start of table row paragraph */
745 if (pPara->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
746 pPara = pPara->member.para.prev_para;
747 /* Paragraph breaks are treated as separate words */
748 if (pPara->member.para.prev_para->type == diTextStart)
749 return FALSE;
751 pRun = ME_FindItemBack(pPara, diRun);
752 pPara = pPara->member.para.prev_para;
754 break;
758 else
760 /* Forward movement */
761 BOOL last_delim = FALSE;
763 while (TRUE)
765 if (last_delim && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
766 pRun->member.run.len, nOffset, WB_ISDELIMITER))
767 break;
768 nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
769 pRun->member.run.len, nOffset, WB_MOVEWORDRIGHT);
770 if (nOffset < pRun->member.run.len)
771 break;
772 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
773 if (pOtherRun->type == diRun)
775 last_delim = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
776 pRun->member.run.len, nOffset - 1, WB_ISDELIMITER);
777 pRun = pOtherRun;
778 nOffset = 0;
780 else if (pOtherRun->type == diParagraph)
782 if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
783 pOtherRun = pOtherRun->member.para.next_para;
784 if (cursor->pRun == pRun) {
785 pPara = pOtherRun;
786 pRun = ME_FindItemFwd(pPara, diRun);
788 nOffset = 0;
789 break;
791 else /* diTextEnd */
793 if (cursor->pRun == pRun)
794 return FALSE;
795 nOffset = 0;
796 break;
800 cursor->pPara = pPara;
801 cursor->pRun = pRun;
802 cursor->nOffset = nOffset;
803 return TRUE;
807 static void
808 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
810 /* pCursor[0] is the end of the selection
811 * pCursor[1] is the start of the selection (or the position selection anchor)
812 * pCursor[2] and [3] are the selection anchors that are backed up
813 * so they are kept when the selection changes for drag selection.
816 editor->nSelectionType = selectionType;
817 switch(selectionType)
819 case stPosition:
820 break;
821 case stWord:
822 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
823 editor->pCursors[1] = editor->pCursors[0];
824 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
825 break;
826 case stLine:
827 case stParagraph:
829 ME_DisplayItem *pItem;
830 ME_DIType fwdSearchType, backSearchType;
831 if (selectionType == stParagraph) {
832 backSearchType = diParagraph;
833 fwdSearchType = diParagraphOrEnd;
834 } else {
835 backSearchType = diStartRow;
836 fwdSearchType = diStartRowOrParagraphOrEnd;
838 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
839 assert(pItem);
840 if (pItem->type == diTextEnd)
841 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
842 else
843 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
844 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
845 editor->pCursors[0].nOffset = 0;
847 pItem = ME_FindItemBack(pItem, backSearchType);
848 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
849 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
850 editor->pCursors[1].nOffset = 0;
851 break;
853 case stDocument:
854 /* Select everything with cursor anchored from the start of the text */
855 editor->nSelectionType = stDocument;
856 ME_SetCursorToStart(editor, &editor->pCursors[1]);
857 ME_SetCursorToEnd(editor, &editor->pCursors[0], FALSE);
858 break;
859 default: assert(0);
861 /* Store the anchor positions for extending the selection. */
862 editor->pCursors[2] = editor->pCursors[0];
863 editor->pCursors[3] = editor->pCursors[1];
866 int ME_GetCursorOfs(const ME_Cursor *cursor)
868 return cursor->pPara->member.para.nCharOfs
869 + cursor->pRun->member.run.nCharOfs + cursor->nOffset;
872 /* Helper function for ME_FindPixelPos to find paragraph within tables */
873 static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
874 ME_DisplayItem *para)
876 ME_DisplayItem *cell, *next_cell;
877 assert(para->member.para.nFlags & MEPF_ROWSTART);
878 cell = para->member.para.next_para->member.para.pCell;
879 assert(cell);
881 /* find the cell we are in */
882 while ((next_cell = cell->member.cell.next_cell) != NULL) {
883 if (x < next_cell->member.cell.pt.x)
885 para = ME_FindItemFwd(cell, diParagraph);
886 /* Found the cell, but there might be multiple paragraphs in
887 * the cell, so need to search down the cell for the paragraph. */
888 while (cell == para->member.para.pCell) {
889 if (y < para->member.para.pt.y + para->member.para.nHeight)
891 if (para->member.para.nFlags & MEPF_ROWSTART)
892 return ME_FindPixelPosInTableRow(x, y, para);
893 else
894 return para;
896 para = para->member.para.next_para;
898 /* Past the end of the cell, so go back to the last cell paragraph */
899 return para->member.para.prev_para;
901 cell = next_cell;
903 /* Return table row delimiter */
904 para = ME_FindItemFwd(cell, diParagraph);
905 assert(para->member.para.nFlags & MEPF_ROWEND);
906 assert(para->member.para.fmt.dwMask & PFM_TABLEROWDELIMITER);
907 assert(para->member.para.fmt.wEffects & PFE_TABLEROWDELIMITER);
908 return para;
911 static BOOL ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
912 int x, ME_Cursor *cursor, BOOL *pbCaretAtEnd)
914 ME_DisplayItem *pNext, *pLastRun;
915 ME_Row *row = &pRow->member.row;
916 BOOL exact = TRUE;
918 if (x < row->pt.x)
920 x = row->pt.x;
921 exact = FALSE;
923 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
924 assert(pNext->type == diRun);
925 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
926 cursor->nOffset = 0;
927 do {
928 int run_x = pNext->member.run.pt.x;
929 int width = pNext->member.run.nWidth;
931 if (x >= run_x && x < run_x+width)
933 cursor->nOffset = ME_CharFromPoint(editor, x-run_x, &pNext->member.run, TRUE, TRUE);
934 cursor->pRun = pNext;
935 cursor->pPara = ME_GetParagraph( cursor->pRun );
936 return exact;
938 pLastRun = pNext;
939 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
940 } while(pNext && pNext->type == diRun);
942 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
944 cursor->pRun = ME_FindItemFwd(pNext, diRun);
945 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
947 else
948 cursor->pRun = pLastRun;
950 cursor->pPara = ME_GetParagraph( cursor->pRun );
951 return FALSE;
954 /* Finds the run and offset from the pixel position.
956 * x & y are pixel positions in virtual coordinates into the rich edit control,
957 * so client coordinates must first be adjusted by the scroll position.
959 * If final_eop is TRUE consider the final end-of-paragraph.
961 * returns TRUE if the result was exactly under the cursor, otherwise returns
962 * FALSE, and result is set to the closest position to the coordinates.
964 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
965 ME_Cursor *result, BOOL *is_eol, BOOL final_eop)
967 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
968 BOOL isExact = TRUE;
970 x -= editor->rcFormat.left;
971 y -= editor->rcFormat.top;
973 if (is_eol)
974 *is_eol = FALSE;
976 /* find paragraph */
977 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
979 assert(p->type == diParagraph);
980 if (y < p->member.para.pt.y + p->member.para.nHeight)
982 if (p->member.para.nFlags & MEPF_ROWSTART)
983 p = ME_FindPixelPosInTableRow(x, y, p);
984 y -= p->member.para.pt.y;
985 p = ME_FindItemFwd(p, diStartRow);
986 break;
987 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
988 p = ME_GetTableRowEnd(p);
991 /* find row */
992 for (; p != editor->pBuffer->pLast; )
994 ME_DisplayItem *pp;
995 assert(p->type == diStartRow);
996 if (y < p->member.row.pt.y + p->member.row.nHeight) break;
997 pp = ME_FindItemFwd(p, diStartRow);
998 if (!pp) break;
999 p = pp;
1001 if (p == editor->pBuffer->pLast && !final_eop)
1003 /* The position is below the last paragraph, so the last row will be used
1004 * rather than the end of the text, so the x position will be used to
1005 * determine the offset closest to the pixel position. */
1006 isExact = FALSE;
1007 p = ME_FindItemBack(p, diStartRow);
1008 if (!p) p = editor->pBuffer->pLast;
1011 assert( p->type == diStartRow || p == editor->pBuffer->pLast );
1013 if( p->type == diStartRow )
1014 return ME_FindRunInRow( editor, p, x, result, is_eol ) && isExact;
1016 ME_SetCursorToEnd(editor, result, TRUE);
1017 return FALSE;
1021 /* Sets the cursor to the position closest to the pixel position
1023 * x & y are pixel positions in client coordinates.
1025 * isExact will be set to TRUE if the run is directly under the pixel
1026 * position, FALSE if it not, unless isExact is set to NULL.
1028 * return FALSE if outside client area and the cursor is not set,
1029 * otherwise TRUE is returned.
1031 BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y,
1032 ME_Cursor *cursor, BOOL *isExact)
1034 RECT rc;
1035 BOOL bResult;
1037 ITextHost_TxGetClientRect(editor->texthost, &rc);
1038 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
1039 if (isExact) *isExact = FALSE;
1040 return FALSE;
1042 x += editor->horz_si.nPos;
1043 y += editor->vert_si.nPos;
1044 bResult = ME_FindPixelPos(editor, x, y, cursor, NULL, FALSE);
1045 if (isExact) *isExact = bResult;
1046 return TRUE;
1051 /* Extends the selection with a word, line, or paragraph selection type.
1053 * The selection is anchored by editor->pCursors[2-3] such that the text
1054 * between the anchors will remain selected, and one end will be extended.
1056 * editor->pCursors[0] should have the position to extend the selection to
1057 * before this function is called.
1059 * Nothing will be done if editor->nSelectionType equals stPosition.
1061 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1063 ME_Cursor tmp_cursor;
1064 int curOfs, anchorStartOfs, anchorEndOfs;
1065 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1066 return;
1067 curOfs = ME_GetCursorOfs(&editor->pCursors[0]);
1068 anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]);
1069 anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]);
1071 tmp_cursor = editor->pCursors[0];
1072 editor->pCursors[0] = editor->pCursors[2];
1073 editor->pCursors[1] = editor->pCursors[3];
1074 if (curOfs < anchorStartOfs)
1076 /* Extend the left side of selection */
1077 editor->pCursors[1] = tmp_cursor;
1078 if (editor->nSelectionType == stWord)
1079 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1080 else
1082 ME_DisplayItem *pItem;
1083 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1084 diStartRowOrParagraph:diParagraph);
1085 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1086 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1087 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
1088 editor->pCursors[1].nOffset = 0;
1091 else if (curOfs >= anchorEndOfs)
1093 /* Extend the right side of selection */
1094 editor->pCursors[0] = tmp_cursor;
1095 if (editor->nSelectionType == stWord)
1096 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1097 else
1099 ME_DisplayItem *pItem;
1100 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1101 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1102 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1103 if (pItem->type == diTextEnd)
1104 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1105 else
1106 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1107 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
1108 editor->pCursors[0].nOffset = 0;
1113 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1115 ME_Cursor tmp_cursor;
1116 BOOL is_selection = FALSE, is_shift;
1118 editor->nUDArrowX = -1;
1120 x += editor->horz_si.nPos;
1121 y += editor->vert_si.nPos;
1123 tmp_cursor = editor->pCursors[0];
1124 is_selection = ME_IsSelection(editor);
1125 is_shift = GetKeyState(VK_SHIFT) < 0;
1127 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd, FALSE);
1129 if (x >= editor->rcFormat.left || is_shift)
1131 if (clickNum > 1)
1133 editor->pCursors[1] = editor->pCursors[0];
1134 if (is_shift) {
1135 if (x >= editor->rcFormat.left)
1136 ME_SelectByType(editor, stWord);
1137 else
1138 ME_SelectByType(editor, stParagraph);
1139 } else if (clickNum % 2 == 0) {
1140 ME_SelectByType(editor, stWord);
1141 } else {
1142 ME_SelectByType(editor, stParagraph);
1145 else if (!is_shift)
1147 editor->nSelectionType = stPosition;
1148 editor->pCursors[1] = editor->pCursors[0];
1150 else if (!is_selection)
1152 editor->nSelectionType = stPosition;
1153 editor->pCursors[1] = tmp_cursor;
1155 else if (editor->nSelectionType != stPosition)
1157 ME_ExtendAnchorSelection(editor);
1160 else
1162 if (clickNum < 2) {
1163 ME_SelectByType(editor, stLine);
1164 } else if (clickNum % 2 == 0 || is_shift) {
1165 ME_SelectByType(editor, stParagraph);
1166 } else {
1167 ME_SelectByType(editor, stDocument);
1170 ME_InvalidateSelection(editor);
1171 ITextHost_TxShowCaret(editor->texthost, FALSE);
1172 ME_ShowCaret(editor);
1173 ME_SendSelChange(editor);
1176 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1178 ME_Cursor tmp_cursor;
1180 if (editor->nSelectionType == stDocument)
1181 return;
1182 x += editor->horz_si.nPos;
1183 y += editor->vert_si.nPos;
1185 tmp_cursor = editor->pCursors[0];
1186 /* FIXME: do something with the return value of ME_FindPixelPos */
1187 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd, TRUE);
1189 ME_InvalidateSelection(editor);
1190 editor->pCursors[0] = tmp_cursor;
1191 ME_ExtendAnchorSelection(editor);
1193 if (editor->nSelectionType != stPosition &&
1194 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1196 /* The scroll the cursor towards the other end, since it was the one
1197 * extended by ME_ExtendAnchorSelection */
1198 ME_EnsureVisible(editor, &editor->pCursors[1]);
1199 } else {
1200 ME_EnsureVisible(editor, &editor->pCursors[0]);
1203 ME_InvalidateSelection(editor);
1204 ITextHost_TxShowCaret(editor->texthost, FALSE);
1205 ME_ShowCaret(editor);
1206 ME_SendSelChange(editor);
1209 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1211 ME_DisplayItem *pRun = pCursor->pRun;
1212 int x;
1214 if (editor->nUDArrowX != -1)
1215 x = editor->nUDArrowX;
1216 else {
1217 if (editor->bCaretAtEnd)
1219 pRun = ME_FindItemBack(pRun, diRun);
1220 assert(pRun);
1221 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1223 else {
1224 x = pRun->member.run.pt.x;
1225 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset, TRUE);
1227 editor->nUDArrowX = x;
1229 return x;
1233 static void
1234 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs, BOOL extend)
1236 ME_DisplayItem *pRun = pCursor->pRun;
1237 ME_DisplayItem *pOldPara = pCursor->pPara;
1238 ME_DisplayItem *pItem, *pNewPara;
1239 int x = ME_GetXForArrow(editor, pCursor);
1241 if (editor->bCaretAtEnd && !pCursor->nOffset)
1242 if (!ME_PrevRun(&pOldPara, &pRun, TRUE))
1243 return;
1245 if (nRelOfs == -1)
1247 /* start of this row */
1248 pItem = ME_FindItemBack(pRun, diStartRow);
1249 assert(pItem);
1250 /* start of the previous row */
1251 pItem = ME_FindItemBack(pItem, diStartRow);
1252 if (!pItem) /* row not found */
1254 if (extend)
1255 ME_SetCursorToStart(editor, pCursor);
1256 return;
1258 pNewPara = ME_GetParagraph(pItem);
1259 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1260 (pOldPara->member.para.pCell &&
1261 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1263 /* Brought out of a cell */
1264 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1265 if (pNewPara->type == diTextStart)
1266 return; /* At the top, so don't go anywhere. */
1267 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1269 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1271 /* Brought into a table row */
1272 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1273 while (x < cell->pt.x && cell->prev_cell)
1274 cell = &cell->prev_cell->member.cell;
1275 if (cell->next_cell) /* else - we are still at the end of the row */
1276 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1279 else
1281 /* start of the next row */
1282 pItem = ME_FindItemFwd(pRun, diStartRow);
1283 if (!pItem) /* row not found */
1285 if (extend)
1286 ME_SetCursorToEnd(editor, pCursor, TRUE);
1287 return;
1289 pNewPara = ME_GetParagraph(pItem);
1290 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1291 (pOldPara->member.para.pCell &&
1292 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1294 /* Brought out of a cell */
1295 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1296 if (pNewPara->type == diTextEnd)
1297 return; /* At the bottom, so don't go anywhere. */
1298 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1300 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1302 /* Brought into a table row */
1303 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1304 while (cell->member.cell.next_cell &&
1305 x >= cell->member.cell.next_cell->member.cell.pt.x)
1306 cell = cell->member.cell.next_cell;
1307 pItem = ME_FindItemFwd(cell, diStartRow);
1310 if (!pItem)
1312 /* row not found - ignore */
1313 return;
1315 ME_FindRunInRow(editor, pItem, x, pCursor, &editor->bCaretAtEnd);
1316 assert(pCursor->pRun);
1317 assert(pCursor->pRun->type == diRun);
1320 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1322 ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
1324 if (editor->vert_si.nPos < p->member.row.nHeight)
1326 ME_SetCursorToStart(editor, pCursor);
1327 editor->bCaretAtEnd = FALSE;
1328 /* Native clears seems to clear this x value on page up at the top
1329 * of the text, but not on page down at the end of the text.
1330 * Doesn't make sense, but we try to be bug for bug compatible. */
1331 editor->nUDArrowX = -1;
1332 } else {
1333 ME_DisplayItem *pRun = pCursor->pRun;
1334 ME_DisplayItem *pLast;
1335 int x, y, yd, yp;
1336 int yOldScrollPos = editor->vert_si.nPos;
1338 x = ME_GetXForArrow(editor, pCursor);
1339 if (!pCursor->nOffset && editor->bCaretAtEnd)
1340 pRun = ME_FindItemBack(pRun, diRun);
1342 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1343 assert(p->type == diStartRow);
1344 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1345 y = yp + p->member.row.pt.y;
1347 ME_ScrollUp(editor, editor->sizeWindow.cy);
1348 /* Only move the cursor by the amount scrolled. */
1349 yd = y + editor->vert_si.nPos - yOldScrollPos;
1350 pLast = p;
1352 do {
1353 p = ME_FindItemBack(p, diStartRowOrParagraph);
1354 if (!p)
1355 break;
1356 if (p->type == diParagraph) { /* crossing paragraphs */
1357 if (p->member.para.prev_para == NULL)
1358 break;
1359 yp = p->member.para.prev_para->member.para.pt.y;
1360 continue;
1362 y = yp + p->member.row.pt.y;
1363 if (y < yd)
1364 break;
1365 pLast = p;
1366 } while(1);
1368 ME_FindRunInRow(editor, pLast, x, pCursor, &editor->bCaretAtEnd);
1370 assert(pCursor->pRun);
1371 assert(pCursor->pRun->type == diRun);
1374 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1376 ME_DisplayItem *pLast;
1377 int x, y;
1379 /* Find y position of the last row */
1380 pLast = editor->pBuffer->pLast;
1381 y = pLast->member.para.prev_para->member.para.pt.y
1382 + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
1384 x = ME_GetXForArrow(editor, pCursor);
1386 if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
1388 ME_SetCursorToEnd(editor, pCursor, FALSE);
1389 editor->bCaretAtEnd = FALSE;
1390 } else {
1391 ME_DisplayItem *pRun = pCursor->pRun;
1392 ME_DisplayItem *p;
1393 int yd, yp;
1394 int yOldScrollPos = editor->vert_si.nPos;
1396 if (!pCursor->nOffset && editor->bCaretAtEnd)
1397 pRun = ME_FindItemBack(pRun, diRun);
1399 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1400 assert(p->type == diStartRow);
1401 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1402 y = yp + p->member.row.pt.y;
1404 /* For native richedit controls:
1405 * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
1406 * v4.1 can scroll past this position here. */
1407 ME_ScrollDown(editor, editor->sizeWindow.cy);
1408 /* Only move the cursor by the amount scrolled. */
1409 yd = y + editor->vert_si.nPos - yOldScrollPos;
1410 pLast = p;
1412 do {
1413 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1414 if (!p)
1415 break;
1416 if (p->type == diParagraph) {
1417 yp = p->member.para.pt.y;
1418 continue;
1420 y = yp + p->member.row.pt.y;
1421 if (y >= yd)
1422 break;
1423 pLast = p;
1424 } while(1);
1426 ME_FindRunInRow(editor, pLast, x, pCursor, &editor->bCaretAtEnd);
1428 assert(pCursor->pRun);
1429 assert(pCursor->pRun->type == diRun);
1432 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1434 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1435 if (pRow) {
1436 ME_DisplayItem *pRun;
1437 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1438 pRow = ME_FindItemBack(pRow, diStartRow);
1439 if (!pRow)
1440 return;
1442 pRun = ME_FindItemFwd(pRow, diRun);
1443 if (pRun) {
1444 pCursor->pRun = pRun;
1445 assert(pCursor->pPara == ME_GetParagraph(pRun));
1446 pCursor->nOffset = 0;
1449 editor->bCaretAtEnd = FALSE;
1452 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1454 ME_SetCursorToStart(editor, pCursor);
1455 editor->bCaretAtEnd = FALSE;
1458 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1460 ME_DisplayItem *pRow;
1462 if (editor->bCaretAtEnd && !pCursor->nOffset)
1463 return;
1465 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1466 assert(pRow);
1467 if (pRow->type == diStartRow) {
1468 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1469 assert(pRun);
1470 pCursor->pRun = pRun;
1471 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1472 pCursor->nOffset = 0;
1473 editor->bCaretAtEnd = TRUE;
1474 return;
1476 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1477 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1478 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1479 pCursor->nOffset = 0;
1480 editor->bCaretAtEnd = FALSE;
1483 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1485 ME_SetCursorToEnd(editor, pCursor, FALSE);
1486 editor->bCaretAtEnd = FALSE;
1489 BOOL ME_IsSelection(ME_TextEditor *editor)
1491 return editor->pCursors[0].pRun != editor->pCursors[1].pRun ||
1492 editor->pCursors[0].nOffset != editor->pCursors[1].nOffset;
1495 void ME_DeleteSelection(ME_TextEditor *editor)
1497 int from, to;
1498 int nStartCursor = ME_GetSelectionOfs(editor, &from, &to);
1499 int nEndCursor = nStartCursor ^ 1;
1500 ME_DeleteTextAtCursor(editor, nStartCursor, to - from);
1501 editor->pCursors[nEndCursor] = editor->pCursors[nStartCursor];
1504 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1506 return ME_GetInsertStyle(editor, 0);
1509 void ME_SendSelChange(ME_TextEditor *editor)
1511 SELCHANGE sc;
1513 sc.nmhdr.hwndFrom = NULL;
1514 sc.nmhdr.idFrom = 0;
1515 sc.nmhdr.code = EN_SELCHANGE;
1516 ME_GetSelectionOfs(editor, &sc.chrg.cpMin, &sc.chrg.cpMax);
1517 sc.seltyp = SEL_EMPTY;
1518 if (sc.chrg.cpMin != sc.chrg.cpMax)
1519 sc.seltyp |= SEL_TEXT;
1520 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* what were RICHEDIT authors thinking ? */
1521 sc.seltyp |= SEL_MULTICHAR;
1523 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1525 ME_ClearTempStyle(editor);
1527 editor->notified_cr = sc.chrg;
1529 if (editor->nEventMask & ENM_SELCHANGE)
1531 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1532 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1533 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1534 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1535 ITextHost_TxNotify(editor->texthost, sc.nmhdr.code, &sc);
1540 BOOL
1541 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1543 int nCursor = 0;
1544 ME_Cursor *p = &editor->pCursors[nCursor];
1545 ME_Cursor tmp_curs = *p;
1546 BOOL success = FALSE;
1548 ME_CheckCharOffsets(editor);
1549 switch(nVKey) {
1550 case VK_LEFT:
1551 editor->bCaretAtEnd = FALSE;
1552 if (ctrl)
1553 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1554 else
1555 success = ME_MoveCursorChars(editor, &tmp_curs, -1, extend);
1556 break;
1557 case VK_RIGHT:
1558 editor->bCaretAtEnd = FALSE;
1559 if (ctrl)
1560 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1561 else
1562 success = ME_MoveCursorChars(editor, &tmp_curs, +1, extend);
1563 break;
1564 case VK_UP:
1565 ME_MoveCursorLines(editor, &tmp_curs, -1, extend);
1566 break;
1567 case VK_DOWN:
1568 ME_MoveCursorLines(editor, &tmp_curs, +1, extend);
1569 break;
1570 case VK_PRIOR:
1571 ME_ArrowPageUp(editor, &tmp_curs);
1572 break;
1573 case VK_NEXT:
1574 ME_ArrowPageDown(editor, &tmp_curs);
1575 break;
1576 case VK_HOME: {
1577 if (ctrl)
1578 ME_ArrowCtrlHome(editor, &tmp_curs);
1579 else
1580 ME_ArrowHome(editor, &tmp_curs);
1581 editor->bCaretAtEnd = FALSE;
1582 break;
1584 case VK_END:
1585 if (ctrl)
1586 ME_ArrowCtrlEnd(editor, &tmp_curs);
1587 else
1588 ME_ArrowEnd(editor, &tmp_curs);
1589 break;
1592 if (!extend)
1593 editor->pCursors[1] = tmp_curs;
1594 *p = tmp_curs;
1596 ME_InvalidateSelection(editor);
1597 ME_Repaint(editor);
1598 ITextHost_TxShowCaret(editor->texthost, FALSE);
1599 ME_EnsureVisible(editor, &tmp_curs);
1600 ME_ShowCaret(editor);
1601 ME_SendSelChange(editor);
1602 return success;