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
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);
34 static void ME_SetCursorToEnd(ME_TextEditor *editor, ME_Cursor *cursor)
36 cursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
37 cursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
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]);
57 int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to)
59 if (ME_GetCursorOfs(&editor->pCursors[0]) < ME_GetCursorOfs(&editor->pCursors[1]))
61 *from = &editor->pCursors[0];
62 *to = &editor->pCursors[1];
65 *from = &editor->pCursors[1];
66 *to = &editor->pCursors[0];
71 int ME_GetTextLength(ME_TextEditor *editor)
74 ME_SetCursorToEnd(editor, &cursor);
75 return ME_GetCursorOfs(&cursor);
79 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
83 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
85 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
88 length = ME_GetTextLength(editor);
90 if ((editor->styleFlags & ES_MULTILINE)
91 && (how->flags & GTL_USECRLF)
92 && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
93 length += editor->nParagraphs - 1;
95 if (how->flags & GTL_NUMBYTES ||
96 (how->flags & GTL_PRECISE && /* GTL_PRECISE seems to imply GTL_NUMBYTES */
97 !(how->flags & GTL_NUMCHARS))) /* unless GTL_NUMCHARS is given */
101 if (how->codepage == 1200)
103 if (how->flags & GTL_PRECISE)
104 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
105 if (GetCPInfo(how->codepage, &cpinfo))
106 return length * cpinfo.MaxCharSize;
107 ERR("Invalid codepage %u\n", how->codepage);
114 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
116 int selectionEnd = 0;
117 const int len = ME_GetTextLength(editor);
119 /* all negative values are effectively the same */
126 if (from == 0 && to == -1)
128 ME_SetCursorToStart(editor, &editor->pCursors[1]);
129 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
130 ME_InvalidateSelection(editor);
131 ME_ClearTempStyle(editor);
135 /* if both values are equal and also out of bound, that means to */
136 /* put the selection at the end of the text */
137 if ((from == to) && (to < 0 || to > len))
143 /* if from is negative and to is positive then selection is */
144 /* deselected and caret moved to end of the current selection */
148 ME_GetSelectionOfs(editor, &start, &end);
151 editor->pCursors[1] = editor->pCursors[0];
154 ME_ClearTempStyle(editor);
158 /* adjust to if it's a negative value */
162 /* flip from and to if they are reversed */
170 /* after fiddling with the values, we find from > len && to > len */
173 /* special case with to too big */
180 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
181 editor->pCursors[1] = editor->pCursors[0];
182 ME_InvalidateSelection(editor);
183 ME_ClearTempStyle(editor);
187 ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]);
188 editor->pCursors[0] = editor->pCursors[1];
189 ME_MoveCursorChars(editor, &editor->pCursors[0], to - from);
190 /* Selection is not allowed in the middle of an end paragraph run. */
191 if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA)
192 editor->pCursors[1].nOffset = 0;
193 if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA)
194 editor->pCursors[0].nOffset = 0;
200 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
201 int *x, int *y, int *height)
204 ME_DisplayItem *run = pCursor->pRun;
205 ME_DisplayItem *para = pCursor->pPara;
206 ME_DisplayItem *pSizeRun = run;
210 assert(height && x && y);
211 assert(~para->member.para.nFlags & MEPF_REWRAP);
212 assert(run && run->type == diRun);
213 assert(para && para->type == diParagraph);
215 row = ME_FindItemBack(run, diStartRowOrParagraph);
216 assert(row && row->type == diStartRow);
218 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
220 if (!pCursor->nOffset)
222 ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph);
224 if (prev->type == diRun)
227 if (editor->bCaretAtEnd && !pCursor->nOffset &&
228 run == ME_FindItemFwd(row, diRun))
230 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
232 if (tmp->type == diRun)
234 row = ME_FindItemBack(tmp, diStartRow);
235 pSizeRun = run = tmp;
237 assert(run->type == diRun);
238 sz = ME_GetRunSize(&c, ¶->member.para,
239 &run->member.run, run->member.run.len,
240 row->member.row.nLMargin);
243 if (pCursor->nOffset) {
244 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run,
245 pCursor->nOffset, row->member.row.nLMargin);
248 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
249 *x = c.rcView.left + run->member.run.pt.x + sz.cx - editor->horz_si.nPos;
250 *y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline
251 + run->member.run.pt.y - pSizeRun->member.run.nAscent
252 - editor->vert_si.nPos;
253 ME_DestroyContext(&c);
259 ME_MoveCaret(ME_TextEditor *editor)
263 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
264 if(editor->bHaveFocus && !ME_IsSelection(editor))
266 x = min(x, editor->rcFormat.right-1);
267 ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height);
268 ITextHost_TxSetCaretPos(editor->texthost, x, y);
273 void ME_ShowCaret(ME_TextEditor *ed)
276 if(ed->bHaveFocus && !ME_IsSelection(ed))
277 ITextHost_TxShowCaret(ed->texthost, TRUE);
280 void ME_HideCaret(ME_TextEditor *ed)
282 if(!ed->bHaveFocus || ME_IsSelection(ed))
284 ITextHost_TxShowCaret(ed->texthost, FALSE);
289 BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start,
290 int nChars, BOOL bForce)
292 ME_Cursor c = *start;
293 int nOfs = ME_GetCursorOfs(start);
295 int totalChars = nChars;
296 ME_DisplayItem *start_para;
298 /* Prevent deletion past last end of paragraph run. */
299 nChars = min(nChars, ME_GetTextLength(editor) - nOfs);
300 start_para = c.pPara;
304 ME_ProtectPartialTableDeletion(editor, &c, &nChars);
312 ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
314 nOfs+nChars == (c.pRun->member.run.nCharOfs
315 + c.pPara->member.para.nCharOfs))
317 /* We aren't deleting anything in this run, so we will go back to the
318 * last run we are deleting text in. */
319 ME_PrevRun(&c.pPara, &c.pRun);
320 c.nOffset = c.pRun->member.run.len;
322 run = &c.pRun->member.run;
323 if (run->nFlags & MERF_ENDPARA) {
324 int eollen = c.pRun->member.run.len;
325 BOOL keepFirstParaFormat;
327 if (!ME_FindItemFwd(c.pRun, diParagraph))
331 keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
333 if (!editor->bEmulateVersion10) /* v4.1 */
335 ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
336 ME_DisplayItem *this_para = next_para->member.para.prev_para;
338 /* The end of paragraph before a table row is only deleted if there
339 * is nothing else on the line before it. */
340 if (this_para == start_para &&
341 next_para->member.para.nFlags & MEPF_ROWSTART)
343 /* If the paragraph will be empty, then it should be deleted, however
344 * it still might have text right now which would inherit the
345 * MEPF_STARTROW property if we joined it right now.
346 * Instead we will delete it after the preceding text is deleted. */
347 if (nOfs > this_para->member.para.nCharOfs) {
348 /* Skip this end of line. */
349 nChars -= (eollen < nChars) ? eollen : nChars;
352 keepFirstParaFormat = TRUE;
355 ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat);
356 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
357 ME_CheckCharOffsets(editor);
358 nChars -= (eollen < nChars) ? eollen : nChars;
364 int nCharsToDelete = min(nChars, c.nOffset);
367 c.nOffset -= nCharsToDelete;
369 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
372 /* nChars is the number of characters that should be deleted from the
373 PRECEDING runs (these BEFORE cursor.pRun)
374 nCharsToDelete is a number of chars to delete from THIS run */
375 nChars -= nCharsToDelete;
376 shift -= nCharsToDelete;
377 TRACE("Deleting %d (remaning %d) chars at %d in %s (%d)\n",
378 nCharsToDelete, nChars, c.nOffset,
379 debugstr_run( run ), run->len);
381 /* nOfs is a character offset (from the start of the document
382 to the current (deleted) run */
383 add_undo_insert_run( editor, nOfs + nChars, get_text( run, c.nOffset ), nCharsToDelete, run->nFlags, run->style );
385 ME_StrDeleteV(run->para->text, run->nCharOfs + c.nOffset, nCharsToDelete);
386 run->len -= nCharsToDelete;
387 TRACE("Post deletion string: %s (%d)\n", debugstr_run( run ), run->len);
388 TRACE("Shift value: %d\n", shift);
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;
399 pThisCur->nOffset -= nCharsToDelete;
400 assert(pThisCur->nOffset >= 0);
401 assert(pThisCur->nOffset <= run->len);
403 if (pThisCur->nOffset == run->len)
405 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
406 assert(pThisCur->pRun->type == diRun);
407 pThisCur->nOffset = 0;
412 /* c = updated data now */
414 if (c.pRun == cursor.pRun)
415 ME_SkipAndPropagateCharOffset(c.pRun, shift);
417 ME_PropagateCharOffset(c.pRun, shift);
419 if (!cursor.pRun->member.run.len)
421 TRACE("Removing empty run\n");
422 ME_Remove(cursor.pRun);
423 ME_DestroyDisplayItem(cursor.pRun);
428 ME_CheckCharOffsets(editor);
436 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
438 assert(nCursor>=0 && nCursor<editor->nCursors);
439 /* text operations set modified state */
440 editor->nModifyStep = 1;
441 return ME_InternalDeleteText(editor, &editor->pCursors[nCursor],
445 static ME_DisplayItem *
446 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
447 const WCHAR *str, int len, ME_Style *style,
450 ME_Cursor *p = &editor->pCursors[nCursor];
452 editor->bCaretAtEnd = FALSE;
454 assert(p->pRun->type == diRun);
456 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
460 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
462 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
467 if (ME_IsSelection(editor))
468 ME_DeleteSelection(editor);
470 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
472 di->member.run.ole_obj = ALLOC_OBJ(*reo);
473 ME_CopyReObject(di->member.run.ole_obj, reo);
474 ME_ReleaseStyle(pStyle);
478 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
480 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
484 if (ME_IsSelection(editor))
485 ME_DeleteSelection(editor);
487 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
489 ME_ReleaseStyle(pStyle);
493 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
494 const WCHAR *str, int len, ME_Style *style)
500 /* FIXME really HERE ? */
501 if (ME_IsSelection(editor))
502 ME_DeleteSelection(editor);
504 /* FIXME: is this too slow? */
505 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
506 oldLen = ME_GetTextLength(editor);
508 /* text operations set modified state */
509 editor->nModifyStep = 1;
513 assert(nCursor>=0 && nCursor<editor->nCursors);
517 /* grow the text limit to fit our text */
518 if(editor->nTextLimit < oldLen +len)
519 editor->nTextLimit = oldLen + len;
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')
529 if (pos != str) { /* handle text */
530 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
531 } else if (*pos == '\t') { /* handle tabs */
533 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
535 } else { /* handle EOLs */
536 ME_DisplayItem *tp, *end_run;
540 /* Find number of CR and LF in end of paragraph run */
543 if (len > 1 && pos[1] == '\n')
545 else if (len > 2 && pos[1] == '\r' && pos[2] == '\n')
550 assert(*pos == '\n');
555 if (!editor->bEmulateVersion10 && eol_len == 3)
557 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
559 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
561 const WCHAR cr = '\r', *eol_str = str;
563 if (!editor->bEmulateVersion10)
569 p = &editor->pCursors[nCursor];
571 ME_SplitRunSimple(editor, p);
572 tmp_style = ME_GetInsertStyle(editor, nCursor);
573 /* ME_SplitParagraph increases style refcount */
574 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, eol_str, eol_len, 0);
575 p->pRun = ME_FindItemFwd(tp, diRun);
577 end_run = ME_FindItemBack(tp, diRun);
578 ME_ReleaseStyle(end_run->member.run.style);
579 end_run->member.run.style = tmp_style;
588 /* Move the cursor nRelOfs characters (either forwards or backwards)
590 * returns the actual number of characters moved.
592 int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
594 cursor->nOffset += nRelOfs;
595 if (cursor->nOffset < 0)
597 cursor->nOffset += cursor->pRun->member.run.nCharOfs;
598 if (cursor->nOffset >= 0)
600 /* new offset in the same paragraph */
602 cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
603 } while (cursor->nOffset < cursor->pRun->member.run.nCharOfs);
604 cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
608 cursor->nOffset += cursor->pPara->member.para.nCharOfs;
609 if (cursor->nOffset <= 0)
611 /* moved to the start of the text */
612 nRelOfs -= cursor->nOffset;
613 ME_SetCursorToStart(editor, cursor);
617 /* new offset in a previous paragraph */
619 cursor->pPara = cursor->pPara->member.para.prev_para;
620 } while (cursor->nOffset < cursor->pPara->member.para.nCharOfs);
621 cursor->nOffset -= cursor->pPara->member.para.nCharOfs;
623 cursor->pRun = ME_FindItemBack(cursor->pPara->member.para.next_para, diRun);
624 while (cursor->nOffset < cursor->pRun->member.run.nCharOfs) {
625 cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
627 cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
628 } else if (cursor->nOffset >= cursor->pRun->member.run.len) {
629 ME_DisplayItem *next_para;
632 new_offset = ME_GetCursorOfs(cursor);
633 next_para = cursor->pPara->member.para.next_para;
634 if (new_offset < next_para->member.para.nCharOfs)
636 /* new offset in the same paragraph */
638 cursor->nOffset -= cursor->pRun->member.run.len;
639 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
640 } while (cursor->nOffset >= cursor->pRun->member.run.len);
644 if (new_offset >= ME_GetTextLength(editor))
646 /* new offset at the end of the text */
647 ME_SetCursorToEnd(editor, cursor);
648 nRelOfs -= new_offset - ME_GetTextLength(editor);
652 /* new offset in a following paragraph */
654 cursor->pPara = next_para;
655 next_para = next_para->member.para.next_para;
656 } while (new_offset >= next_para->member.para.nCharOfs);
658 cursor->nOffset = new_offset - cursor->pPara->member.para.nCharOfs;
659 cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
660 while (cursor->nOffset >= cursor->pRun->member.run.len)
662 cursor->nOffset -= cursor->pRun->member.run.len;
663 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
665 } /* else new offset is in the same run */
671 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
673 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
674 ME_DisplayItem *pPara = cursor->pPara;
675 int nOffset = cursor->nOffset;
679 /* Backward movement */
682 nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
683 pRun->member.run.len, nOffset, WB_MOVEWORDLEFT);
686 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
687 if (pOtherRun->type == diRun)
689 if (ME_CallWordBreakProc(editor, get_text( &pOtherRun->member.run, 0 ),
690 pOtherRun->member.run.len,
691 pOtherRun->member.run.len - 1,
693 && !(pRun->member.run.nFlags & MERF_ENDPARA)
694 && !(cursor->pRun == pRun && cursor->nOffset == 0)
695 && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
696 pRun->member.run.len, 0,
700 nOffset = pOtherRun->member.run.len;
702 else if (pOtherRun->type == diParagraph)
704 if (cursor->pRun == pRun && cursor->nOffset == 0)
707 /* Skip empty start of table row paragraph */
708 if (pPara->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
709 pPara = pPara->member.para.prev_para;
710 /* Paragraph breaks are treated as separate words */
711 if (pPara->member.para.prev_para->type == diTextStart)
714 pRun = ME_FindItemBack(pPara, diRun);
715 pPara = pPara->member.para.prev_para;
723 /* Forward movement */
724 BOOL last_delim = FALSE;
728 if (last_delim && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
729 pRun->member.run.len, nOffset, WB_ISDELIMITER))
731 nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
732 pRun->member.run.len, nOffset, WB_MOVEWORDRIGHT);
733 if (nOffset < pRun->member.run.len)
735 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
736 if (pOtherRun->type == diRun)
738 last_delim = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
739 pRun->member.run.len, nOffset - 1, WB_ISDELIMITER);
743 else if (pOtherRun->type == diParagraph)
745 if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
746 pOtherRun = pOtherRun->member.para.next_para;
747 if (cursor->pRun == pRun) {
749 pRun = ME_FindItemFwd(pPara, diRun);
756 if (cursor->pRun == pRun)
763 cursor->pPara = pPara;
765 cursor->nOffset = nOffset;
771 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
773 /* pCursor[0] is the end of the selection
774 * pCursor[1] is the start of the selection (or the position selection anchor)
775 * pCursor[2] and [3] are the selection anchors that are backed up
776 * so they are kept when the selection changes for drag selection.
779 editor->nSelectionType = selectionType;
780 switch(selectionType)
785 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
786 editor->pCursors[1] = editor->pCursors[0];
787 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
792 ME_DisplayItem *pItem;
793 ME_DIType fwdSearchType, backSearchType;
794 if (selectionType == stParagraph) {
795 backSearchType = diParagraph;
796 fwdSearchType = diParagraphOrEnd;
798 backSearchType = diStartRow;
799 fwdSearchType = diStartRowOrParagraphOrEnd;
801 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
803 if (pItem->type == diTextEnd)
804 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
806 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
807 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
808 editor->pCursors[0].nOffset = 0;
810 pItem = ME_FindItemBack(pItem, backSearchType);
811 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
812 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
813 editor->pCursors[1].nOffset = 0;
817 /* Select everything with cursor anchored from the start of the text */
818 editor->nSelectionType = stDocument;
819 ME_SetCursorToStart(editor, &editor->pCursors[1]);
820 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
824 /* Store the anchor positions for extending the selection. */
825 editor->pCursors[2] = editor->pCursors[0];
826 editor->pCursors[3] = editor->pCursors[1];
829 int ME_GetCursorOfs(const ME_Cursor *cursor)
831 return cursor->pPara->member.para.nCharOfs
832 + cursor->pRun->member.run.nCharOfs + cursor->nOffset;
835 /* Helper function for ME_FindPixelPos to find paragraph within tables */
836 static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
837 ME_DisplayItem *para)
839 ME_DisplayItem *cell, *next_cell;
840 assert(para->member.para.nFlags & MEPF_ROWSTART);
841 cell = para->member.para.next_para->member.para.pCell;
844 /* find the cell we are in */
845 while ((next_cell = cell->member.cell.next_cell) != NULL) {
846 if (x < next_cell->member.cell.pt.x)
848 para = ME_FindItemFwd(cell, diParagraph);
849 /* Found the cell, but there might be multiple paragraphs in
850 * the cell, so need to search down the cell for the paragraph. */
851 while (cell == para->member.para.pCell) {
852 if (y < para->member.para.pt.y + para->member.para.nHeight)
854 if (para->member.para.nFlags & MEPF_ROWSTART)
855 return ME_FindPixelPosInTableRow(x, y, para);
859 para = para->member.para.next_para;
861 /* Past the end of the cell, so go back to the last cell paragraph */
862 return para->member.para.prev_para;
866 /* Return table row delimiter */
867 para = ME_FindItemFwd(cell, diParagraph);
868 assert(para->member.para.nFlags & MEPF_ROWEND);
869 assert(para->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
870 assert(para->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
874 static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found,
875 ME_Cursor *result, int rx, BOOL isExact)
878 assert(found->type == diRun);
879 if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0)
881 result->pRun = found;
882 result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run);
883 if (result->nOffset == found->member.run.len && rx)
885 result->pRun = ME_FindItemFwd(result->pRun, diRun);
888 result->pPara = ME_GetParagraph(result->pRun);
892 /* Finds the run and offset from the pixel position.
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.
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.
900 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
901 ME_Cursor *result, BOOL *is_eol)
903 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
904 ME_DisplayItem *last = NULL;
908 x -= editor->rcFormat.left;
909 y -= editor->rcFormat.top;
915 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
917 assert(p->type == diParagraph);
918 if (y < p->member.para.pt.y + p->member.para.nHeight)
920 if (p->member.para.nFlags & MEPF_ROWSTART)
921 p = ME_FindPixelPosInTableRow(x, y, p);
922 y -= p->member.para.pt.y;
923 p = ME_FindItemFwd(p, diStartRow);
925 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
926 p = ME_GetTableRowEnd(p);
930 for (; p != editor->pBuffer->pLast; )
933 assert(p->type == diStartRow);
934 if (y < p->member.row.pt.y + p->member.row.nHeight)
936 p = ME_FindItemFwd(p, diRun);
939 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
940 if (pp->type != diStartRow)
942 p = ME_FindItemFwd(p, diRun);
947 if (p == editor->pBuffer->pLast)
949 /* The position is below the last paragraph, so the last row will be used
950 * rather than the end of the text, so the x position will be used to
951 * determine the offset closest to the pixel position. */
953 p = ME_FindItemBack(p, diStartRow);
955 p = ME_FindItemFwd(p, diRun);
959 p = editor->pBuffer->pLast;
962 for (; p != editor->pBuffer->pLast; p = p->next)
967 rx = x - p->member.run.pt.x;
968 if (rx < p->member.run.nWidth)
969 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
973 p = ME_FindItemFwd(p, diRun);
974 if (is_eol) *is_eol = 1;
975 rx = 0; /* FIXME not sure */
976 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
981 rx = 0; /* FIXME not sure */
983 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
988 result->pRun = ME_FindItemBack(p, diRun);
989 result->pPara = ME_GetParagraph(result->pRun);
991 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
996 /* Sets the cursor to the position closest to the pixel position
998 * x & y are pixel positions in client coordinates.
1000 * isExact will be set to TRUE if the run is directly under the pixel
1001 * position, FALSE if it not, unless isExact is set to NULL.
1003 * return FALSE if outside client area and the cursor is not set,
1004 * otherwise TRUE is returned.
1006 BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y,
1007 ME_Cursor *cursor, BOOL *isExact)
1012 ITextHost_TxGetClientRect(editor->texthost, &rc);
1013 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
1014 if (isExact) *isExact = FALSE;
1017 x += editor->horz_si.nPos;
1018 y += editor->vert_si.nPos;
1019 bResult = ME_FindPixelPos(editor, x, y, cursor, NULL);
1020 if (isExact) *isExact = bResult;
1026 /* Extends the selection with a word, line, or paragraph selection type.
1028 * The selection is anchored by editor->pCursors[2-3] such that the text
1029 * between the anchors will remain selected, and one end will be extended.
1031 * editor->pCursors[0] should have the position to extend the selection to
1032 * before this function is called.
1034 * Nothing will be done if editor->nSelectionType equals stPosition.
1036 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1038 ME_Cursor tmp_cursor;
1039 int curOfs, anchorStartOfs, anchorEndOfs;
1040 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1042 curOfs = ME_GetCursorOfs(&editor->pCursors[0]);
1043 anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]);
1044 anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]);
1046 tmp_cursor = editor->pCursors[0];
1047 editor->pCursors[0] = editor->pCursors[2];
1048 editor->pCursors[1] = editor->pCursors[3];
1049 if (curOfs < anchorStartOfs)
1051 /* Extend the left side of selection */
1052 editor->pCursors[1] = tmp_cursor;
1053 if (editor->nSelectionType == stWord)
1054 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1057 ME_DisplayItem *pItem;
1058 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1059 diStartRowOrParagraph:diParagraph);
1060 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1061 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1062 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
1063 editor->pCursors[1].nOffset = 0;
1066 else if (curOfs >= anchorEndOfs)
1068 /* Extend the right side of selection */
1069 editor->pCursors[0] = tmp_cursor;
1070 if (editor->nSelectionType == stWord)
1071 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1074 ME_DisplayItem *pItem;
1075 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1076 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1077 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1078 if (pItem->type == diTextEnd)
1079 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1081 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1082 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
1083 editor->pCursors[0].nOffset = 0;
1088 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1090 ME_Cursor tmp_cursor;
1091 int is_selection = 0;
1094 editor->nUDArrowX = -1;
1096 x += editor->horz_si.nPos;
1097 y += editor->vert_si.nPos;
1099 tmp_cursor = editor->pCursors[0];
1100 is_selection = ME_IsSelection(editor);
1101 is_shift = GetKeyState(VK_SHIFT) < 0;
1103 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1105 if (x >= editor->rcFormat.left || is_shift)
1109 editor->pCursors[1] = editor->pCursors[0];
1111 if (x >= editor->rcFormat.left)
1112 ME_SelectByType(editor, stWord);
1114 ME_SelectByType(editor, stParagraph);
1115 } else if (clickNum % 2 == 0) {
1116 ME_SelectByType(editor, stWord);
1118 ME_SelectByType(editor, stParagraph);
1123 editor->nSelectionType = stPosition;
1124 editor->pCursors[1] = editor->pCursors[0];
1126 else if (!is_selection)
1128 editor->nSelectionType = stPosition;
1129 editor->pCursors[1] = tmp_cursor;
1131 else if (editor->nSelectionType != stPosition)
1133 ME_ExtendAnchorSelection(editor);
1139 ME_SelectByType(editor, stLine);
1140 } else if (clickNum % 2 == 0 || is_shift) {
1141 ME_SelectByType(editor, stParagraph);
1143 ME_SelectByType(editor, stDocument);
1146 ME_InvalidateSelection(editor);
1147 ITextHost_TxShowCaret(editor->texthost, FALSE);
1148 ME_ShowCaret(editor);
1149 ME_ClearTempStyle(editor);
1150 ME_SendSelChange(editor);
1153 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1155 ME_Cursor tmp_cursor;
1157 if (editor->nSelectionType == stDocument)
1159 x += editor->horz_si.nPos;
1160 y += editor->vert_si.nPos;
1162 tmp_cursor = editor->pCursors[0];
1163 /* FIXME: do something with the return value of ME_FindPixelPos */
1164 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1166 ME_InvalidateSelection(editor);
1167 editor->pCursors[0] = tmp_cursor;
1168 ME_ExtendAnchorSelection(editor);
1170 if (editor->nSelectionType != stPosition &&
1171 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1173 /* The scroll the cursor towards the other end, since it was the one
1174 * extended by ME_ExtendAnchorSelection */
1175 ME_EnsureVisible(editor, &editor->pCursors[1]);
1177 ME_EnsureVisible(editor, &editor->pCursors[0]);
1180 ME_InvalidateSelection(editor);
1181 ITextHost_TxShowCaret(editor->texthost, FALSE);
1182 ME_ShowCaret(editor);
1183 ME_SendSelChange(editor);
1186 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1187 int x, int *pOffset, int *pbCaretAtEnd)
1189 ME_DisplayItem *pNext, *pLastRun;
1190 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1191 assert(pNext->type == diRun);
1192 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1193 if (pOffset) *pOffset = 0;
1195 int run_x = pNext->member.run.pt.x;
1196 int width = pNext->member.run.nWidth;
1201 if (x >= run_x && x < run_x+width)
1203 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1204 if (ch < pNext->member.run.len) {
1211 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1212 } while(pNext && pNext->type == diRun);
1214 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1216 pNext = ME_FindItemFwd(pNext, diRun);
1217 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1224 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1226 ME_DisplayItem *pRun = pCursor->pRun;
1229 if (editor->nUDArrowX != -1)
1230 x = editor->nUDArrowX;
1232 if (editor->bCaretAtEnd)
1234 pRun = ME_FindItemBack(pRun, diRun);
1236 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1239 x = pRun->member.run.pt.x;
1240 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1242 editor->nUDArrowX = x;
1249 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1251 ME_DisplayItem *pRun = pCursor->pRun;
1252 ME_DisplayItem *pOldPara = pCursor->pPara;
1253 ME_DisplayItem *pItem, *pNewPara;
1254 int x = ME_GetXForArrow(editor, pCursor);
1256 if (editor->bCaretAtEnd && !pCursor->nOffset)
1257 if (!ME_PrevRun(&pOldPara, &pRun))
1262 /* start of this row */
1263 pItem = ME_FindItemBack(pRun, diStartRow);
1265 /* start of the previous row */
1266 pItem = ME_FindItemBack(pItem, diStartRow);
1268 return; /* row not found - ignore */
1269 pNewPara = ME_GetParagraph(pItem);
1270 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1271 (pOldPara->member.para.pCell &&
1272 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1274 /* Brought out of a cell */
1275 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1276 if (pNewPara->type == diTextStart)
1277 return; /* At the top, so don't go anywhere. */
1278 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1280 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1282 /* Brought into a table row */
1283 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1284 while (x < cell->pt.x && cell->prev_cell)
1285 cell = &cell->prev_cell->member.cell;
1286 if (cell->next_cell) /* else - we are still at the end of the row */
1287 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1292 /* start of the next row */
1293 pItem = ME_FindItemFwd(pRun, diStartRow);
1295 return; /* row not found - ignore */
1296 pNewPara = ME_GetParagraph(pItem);
1297 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1298 (pOldPara->member.para.pCell &&
1299 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1301 /* Brought out of a cell */
1302 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1303 if (pNewPara->type == diTextEnd)
1304 return; /* At the bottom, so don't go anywhere. */
1305 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1307 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1309 /* Brought into a table row */
1310 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1311 while (cell->member.cell.next_cell &&
1312 x >= cell->member.cell.next_cell->member.cell.pt.x)
1313 cell = cell->member.cell.next_cell;
1314 pItem = ME_FindItemFwd(cell, diStartRow);
1319 /* row not found - ignore */
1322 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1323 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1324 assert(pCursor->pRun);
1325 assert(pCursor->pRun->type == diRun);
1328 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1330 ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
1332 if (editor->vert_si.nPos < p->member.row.nHeight)
1334 ME_SetCursorToStart(editor, pCursor);
1335 editor->bCaretAtEnd = FALSE;
1336 /* Native clears seems to clear this x value on page up at the top
1337 * of the text, but not on page down at the end of the text.
1338 * Doesn't make sense, but we try to be bug for bug compatible. */
1339 editor->nUDArrowX = -1;
1341 ME_DisplayItem *pRun = pCursor->pRun;
1342 ME_DisplayItem *pLast;
1344 int yOldScrollPos = editor->vert_si.nPos;
1346 x = ME_GetXForArrow(editor, pCursor);
1347 if (!pCursor->nOffset && editor->bCaretAtEnd)
1348 pRun = ME_FindItemBack(pRun, diRun);
1350 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1351 assert(p->type == diStartRow);
1352 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1353 y = yp + p->member.row.pt.y;
1355 ME_ScrollUp(editor, editor->sizeWindow.cy);
1356 /* Only move the cursor by the amount scrolled. */
1357 yd = y + editor->vert_si.nPos - yOldScrollPos;
1361 p = ME_FindItemBack(p, diStartRowOrParagraph);
1364 if (p->type == diParagraph) { /* crossing paragraphs */
1365 if (p->member.para.prev_para == NULL)
1367 yp = p->member.para.prev_para->member.para.pt.y;
1370 y = yp + p->member.row.pt.y;
1376 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1377 &editor->bCaretAtEnd);
1378 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1380 assert(pCursor->pRun);
1381 assert(pCursor->pRun->type == diRun);
1384 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1386 ME_DisplayItem *pLast;
1389 /* Find y position of the last row */
1390 pLast = editor->pBuffer->pLast;
1391 y = pLast->member.para.prev_para->member.para.pt.y
1392 + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
1394 x = ME_GetXForArrow(editor, pCursor);
1396 if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
1398 ME_SetCursorToEnd(editor, pCursor);
1399 editor->bCaretAtEnd = FALSE;
1401 ME_DisplayItem *pRun = pCursor->pRun;
1404 int yOldScrollPos = editor->vert_si.nPos;
1406 if (!pCursor->nOffset && editor->bCaretAtEnd)
1407 pRun = ME_FindItemBack(pRun, diRun);
1409 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1410 assert(p->type == diStartRow);
1411 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1412 y = yp + p->member.row.pt.y;
1414 /* For native richedit controls:
1415 * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
1416 * v4.1 can scroll past this position here. */
1417 ME_ScrollDown(editor, editor->sizeWindow.cy);
1418 /* Only move the cursor by the amount scrolled. */
1419 yd = y + editor->vert_si.nPos - yOldScrollPos;
1423 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1426 if (p->type == diParagraph) {
1427 yp = p->member.para.pt.y;
1430 y = yp + p->member.row.pt.y;
1436 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1437 &editor->bCaretAtEnd);
1438 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1440 assert(pCursor->pRun);
1441 assert(pCursor->pRun->type == diRun);
1444 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1446 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1448 ME_DisplayItem *pRun;
1449 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1450 pRow = ME_FindItemBack(pRow, diStartRow);
1454 pRun = ME_FindItemFwd(pRow, diRun);
1456 pCursor->pRun = pRun;
1457 assert(pCursor->pPara == ME_GetParagraph(pRun));
1458 pCursor->nOffset = 0;
1461 editor->bCaretAtEnd = FALSE;
1464 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1466 ME_SetCursorToStart(editor, pCursor);
1467 editor->bCaretAtEnd = FALSE;
1470 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1472 ME_DisplayItem *pRow;
1474 if (editor->bCaretAtEnd && !pCursor->nOffset)
1477 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1479 if (pRow->type == diStartRow) {
1480 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1482 pCursor->pRun = pRun;
1483 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1484 pCursor->nOffset = 0;
1485 editor->bCaretAtEnd = TRUE;
1488 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1489 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1490 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1491 pCursor->nOffset = 0;
1492 editor->bCaretAtEnd = FALSE;
1495 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1497 ME_SetCursorToEnd(editor, pCursor);
1498 editor->bCaretAtEnd = FALSE;
1501 BOOL ME_IsSelection(ME_TextEditor *editor)
1503 return editor->pCursors[0].pRun != editor->pCursors[1].pRun ||
1504 editor->pCursors[0].nOffset != editor->pCursors[1].nOffset;
1507 void ME_DeleteSelection(ME_TextEditor *editor)
1510 int nStartCursor = ME_GetSelectionOfs(editor, &from, &to);
1511 ME_DeleteTextAtCursor(editor, nStartCursor, to - from);
1514 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1516 return ME_GetInsertStyle(editor, 0);
1519 void ME_SendSelChange(ME_TextEditor *editor)
1523 if (!(editor->nEventMask & ENM_SELCHANGE))
1526 sc.nmhdr.hwndFrom = NULL;
1527 sc.nmhdr.idFrom = 0;
1528 sc.nmhdr.code = EN_SELCHANGE;
1529 ME_GetSelectionOfs(editor, &sc.chrg.cpMin, &sc.chrg.cpMax);
1530 sc.seltyp = SEL_EMPTY;
1531 if (sc.chrg.cpMin != sc.chrg.cpMax)
1532 sc.seltyp |= SEL_TEXT;
1533 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* what were RICHEDIT authors thinking ? */
1534 sc.seltyp |= SEL_MULTICHAR;
1535 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1536 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1537 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1538 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1539 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1541 ME_ClearTempStyle(editor);
1543 editor->notified_cr = sc.chrg;
1544 ITextHost_TxNotify(editor->texthost, sc.nmhdr.code, &sc);
1549 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1552 ME_Cursor *p = &editor->pCursors[nCursor];
1553 ME_Cursor tmp_curs = *p;
1554 BOOL success = FALSE;
1556 ME_CheckCharOffsets(editor);
1559 editor->bCaretAtEnd = 0;
1561 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1563 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1566 editor->bCaretAtEnd = 0;
1568 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1570 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1573 ME_MoveCursorLines(editor, &tmp_curs, -1);
1576 ME_MoveCursorLines(editor, &tmp_curs, +1);
1579 ME_ArrowPageUp(editor, &tmp_curs);
1582 ME_ArrowPageDown(editor, &tmp_curs);
1586 ME_ArrowCtrlHome(editor, &tmp_curs);
1588 ME_ArrowHome(editor, &tmp_curs);
1589 editor->bCaretAtEnd = 0;
1594 ME_ArrowCtrlEnd(editor, &tmp_curs);
1596 ME_ArrowEnd(editor, &tmp_curs);
1601 editor->pCursors[1] = tmp_curs;
1604 ME_InvalidateSelection(editor);
1606 ITextHost_TxShowCaret(editor->texthost, FALSE);
1607 ME_EnsureVisible(editor, &tmp_curs);
1608 ME_ShowCaret(editor);
1609 ME_SendSelChange(editor);