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);
28 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs);
30 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
32 *from = ME_GetCursorOfs(editor, 0);
33 *to = ME_GetCursorOfs(editor, 1);
43 int ME_GetTextLength(ME_TextEditor *editor)
45 ME_DisplayItem *pLast = editor->pBuffer->pLast;
46 return ME_CharOfsFromRunOfs(editor, pLast->member.para.prev_para,
47 ME_FindItemBack(pLast, diRun), 0);
51 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
55 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
57 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
60 length = ME_GetTextLength(editor);
62 if ((editor->styleFlags & ES_MULTILINE)
63 && (how->flags & GTL_USECRLF)
64 && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
65 length += editor->nParagraphs - 1;
67 if (how->flags & GTL_NUMBYTES)
71 if (how->codepage == 1200)
73 if (how->flags & GTL_PRECISE)
74 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
75 if (GetCPInfo(how->codepage, &cpinfo))
76 return length * cpinfo.MaxCharSize;
77 ERR("Invalid codepage %u\n", how->codepage);
84 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
87 const int len = ME_GetTextLength(editor);
89 /* all negative values are effectively the same */
96 if (from == 0 && to == -1)
98 editor->pCursors[1].pPara = editor->pBuffer->pFirst->member.para.next_para;
99 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pCursors[1].pPara, diRun);
100 editor->pCursors[1].nOffset = 0;
101 editor->pCursors[0].pPara = editor->pBuffer->pLast->member.para.prev_para;
102 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
103 editor->pCursors[0].nOffset = 0;
104 ME_InvalidateSelection(editor);
105 ME_ClearTempStyle(editor);
109 /* if both values are equal and also out of bound, that means to */
110 /* put the selection at the end of the text */
111 if ((from == to) && (to < 0 || to > len))
117 /* if from is negative and to is positive then selection is */
118 /* deselected and caret moved to end of the current selection */
122 ME_GetSelection(editor, &start, &end);
123 editor->pCursors[1] = editor->pCursors[0];
125 ME_ClearTempStyle(editor);
129 /* adjust to if it's a negative value */
133 /* flip from and to if they are reversed */
141 /* after fiddling with the values, we find from > len && to > len */
144 /* special case with to too big */
151 editor->pCursors[0].pPara = editor->pBuffer->pLast->member.para.prev_para;
152 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
153 editor->pCursors[0].nOffset = 0;
154 editor->pCursors[1] = editor->pCursors[0];
155 ME_InvalidateSelection(editor);
156 ME_ClearTempStyle(editor);
160 ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]);
161 ME_CursorFromCharOfs(editor, to, &editor->pCursors[0]);
162 /* Selection is not allowed in the middle of an end paragraph run. */
163 if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA)
164 editor->pCursors[1].nOffset = 0;
165 if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA)
166 editor->pCursors[0].nOffset = 0;
172 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
173 int *x, int *y, int *height)
176 ME_DisplayItem *run = pCursor->pRun;
177 ME_DisplayItem *para = pCursor->pPara;
178 ME_DisplayItem *pSizeRun = run;
182 assert(height && x && y);
183 assert(~para->member.para.nFlags & MEPF_REWRAP);
184 assert(run && run->type == diRun);
185 assert(para && para->type == diParagraph);
187 row = ME_FindItemBack(run, diStartRowOrParagraph);
188 assert(row && row->type == diStartRow);
190 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
192 if (!pCursor->nOffset)
194 ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph);
196 if (prev->type == diRun)
199 if (editor->bCaretAtEnd && !pCursor->nOffset &&
200 run == ME_FindItemFwd(row, diRun))
202 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
204 if (tmp->type == diRun)
206 row = ME_FindItemBack(tmp, diStartRow);
207 pSizeRun = run = tmp;
209 assert(run->type == diRun);
210 sz = ME_GetRunSize(&c, ¶->member.para,
211 &run->member.run, run->member.run.strText->nLen,
212 row->member.row.nLMargin);
215 if (pCursor->nOffset) {
216 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run,
217 pCursor->nOffset, row->member.row.nLMargin);
220 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
221 *x = c.rcView.left + run->member.run.pt.x + sz.cx - editor->horz_si.nPos;
222 *y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline
223 + run->member.run.pt.y - pSizeRun->member.run.nAscent
224 - editor->vert_si.nPos;
225 ME_DestroyContext(&c);
231 ME_MoveCaret(ME_TextEditor *editor)
235 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
236 if(editor->bHaveFocus && !ME_IsSelection(editor))
238 x = min(x, editor->rcFormat.right-1);
239 ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height);
240 ITextHost_TxSetCaretPos(editor->texthost, x, y);
245 void ME_ShowCaret(ME_TextEditor *ed)
248 if(ed->bHaveFocus && !ME_IsSelection(ed))
249 ITextHost_TxShowCaret(ed->texthost, TRUE);
252 void ME_HideCaret(ME_TextEditor *ed)
254 if(!ed->bHaveFocus || ME_IsSelection(ed))
256 ITextHost_TxShowCaret(ed->texthost, FALSE);
261 BOOL ME_InternalDeleteText(ME_TextEditor *editor, int nOfs, int nChars,
266 int totalChars = nChars;
267 ME_DisplayItem *start_para;
269 /* Prevent deletion past last end of paragraph run. */
270 nChars = min(nChars, ME_GetTextLength(editor) - nOfs);
272 ME_CursorFromCharOfs(editor, nOfs, &c);
273 start_para = c.pPara;
277 ME_ProtectPartialTableDeletion(editor, nOfs, &nChars);
285 ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
287 nOfs+nChars == (c.pRun->member.run.nCharOfs
288 + c.pPara->member.para.nCharOfs))
290 /* We aren't deleting anything in this run, so we will go back to the
291 * last run we are deleting text in. */
292 c.pRun = ME_FindItemBack(c.pRun, diRun);
293 c.pPara = ME_GetParagraph(c.pRun);
294 c.nOffset = c.pRun->member.run.strText->nLen;
296 run = &c.pRun->member.run;
297 if (run->nFlags & MERF_ENDPARA) {
298 int eollen = c.pRun->member.run.strText->nLen;
299 BOOL keepFirstParaFormat;
301 if (!ME_FindItemFwd(c.pRun, diParagraph))
305 keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
307 if (!editor->bEmulateVersion10) /* v4.1 */
309 ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
310 ME_DisplayItem *this_para = next_para->member.para.prev_para;
312 /* The end of paragraph before a table row is only deleted if there
313 * is nothing else on the line before it. */
314 if (this_para == start_para &&
315 next_para->member.para.nFlags & MEPF_ROWSTART)
317 /* If the paragraph will be empty, then it should be deleted, however
318 * it still might have text right now which would inherit the
319 * MEPF_STARTROW property if we joined it right now.
320 * Instead we will delete it after the preceding text is deleted. */
321 if (nOfs > this_para->member.para.nCharOfs) {
322 /* Skip this end of line. */
323 nChars -= (eollen < nChars) ? eollen : nChars;
326 keepFirstParaFormat = TRUE;
329 ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat);
330 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
331 ME_CheckCharOffsets(editor);
332 nChars -= (eollen < nChars) ? eollen : nChars;
338 int nCharsToDelete = min(nChars, c.nOffset);
341 c.nOffset -= nCharsToDelete;
343 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
346 /* nChars is the number of characters that should be deleted from the
347 PRECEDING runs (these BEFORE cursor.pRun)
348 nCharsToDelete is a number of chars to delete from THIS run */
349 nChars -= nCharsToDelete;
350 shift -= nCharsToDelete;
351 TRACE("Deleting %d (remaning %d) chars at %d in '%s' (%d)\n",
352 nCharsToDelete, nChars, c.nOffset,
353 debugstr_w(run->strText->szData), run->strText->nLen);
355 if (!c.nOffset && run->strText->nLen == nCharsToDelete)
357 /* undo = reinsert whole run */
358 /* nOfs is a character offset (from the start of the document
359 to the current (deleted) run */
360 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
362 pUndo->di.member.run.nCharOfs = nOfs+nChars;
366 /* undo = reinsert partial run */
367 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
369 ME_DestroyString(pUndo->di.member.run.strText);
370 pUndo->di.member.run.nCharOfs = nOfs+nChars;
371 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
374 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
375 TRACE("Shift value: %d\n", shift);
376 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
378 /* update cursors (including c) */
379 for (i=-1; i<editor->nCursors; i++) {
380 ME_Cursor *pThisCur = editor->pCursors + i;
381 if (i == -1) pThisCur = &c;
382 if (pThisCur->pRun == cursor.pRun) {
383 if (pThisCur->nOffset > cursor.nOffset) {
384 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
385 pThisCur->nOffset = cursor.nOffset;
387 pThisCur->nOffset -= nCharsToDelete;
388 assert(pThisCur->nOffset >= 0);
389 assert(pThisCur->nOffset <= run->strText->nLen);
391 if (pThisCur->nOffset == run->strText->nLen)
393 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
394 assert(pThisCur->pRun->type == diRun);
395 pThisCur->nOffset = 0;
400 /* c = updated data now */
402 if (c.pRun == cursor.pRun)
403 ME_SkipAndPropagateCharOffset(c.pRun, shift);
405 ME_PropagateCharOffset(c.pRun, shift);
407 if (!cursor.pRun->member.run.strText->nLen)
409 TRACE("Removing useless run\n");
410 ME_Remove(cursor.pRun);
411 ME_DestroyDisplayItem(cursor.pRun);
416 ME_CheckCharOffsets(editor);
424 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
426 assert(nCursor>=0 && nCursor<editor->nCursors);
427 /* text operations set modified state */
428 editor->nModifyStep = 1;
429 return ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars,
433 static ME_DisplayItem *
434 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
435 const WCHAR *str, int len, ME_Style *style,
438 ME_Cursor *p = &editor->pCursors[nCursor];
440 editor->bCaretAtEnd = FALSE;
442 assert(p->pRun->type == diRun);
444 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
448 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
450 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
455 if (ME_IsSelection(editor))
456 ME_DeleteSelection(editor);
458 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
460 di->member.run.ole_obj = ALLOC_OBJ(*reo);
461 ME_CopyReObject(di->member.run.ole_obj, reo);
462 ME_SendSelChange(editor);
466 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
468 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
473 if (ME_IsSelection(editor))
474 ME_DeleteSelection(editor);
476 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
478 ME_SendSelChange(editor);
482 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
483 const WCHAR *str, int len, ME_Style *style)
489 /* FIXME really HERE ? */
490 if (ME_IsSelection(editor))
491 ME_DeleteSelection(editor);
493 /* FIXME: is this too slow? */
494 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
495 oldLen = ME_GetTextLength(editor);
497 /* text operations set modified state */
498 editor->nModifyStep = 1;
502 assert(nCursor>=0 && nCursor<editor->nCursors);
506 /* grow the text limit to fit our text */
507 if(editor->nTextLimit < oldLen +len)
508 editor->nTextLimit = oldLen + len;
514 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
515 while(pos - str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
518 if (pos != str) { /* handle text */
519 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
520 } else if (*pos == '\t') { /* handle tabs */
522 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
524 } else { /* handle EOLs */
525 ME_DisplayItem *tp, *end_run;
529 /* Find number of CR and LF in end of paragraph run */
532 if (len > 1 && pos[1] == '\n')
534 else if (len > 2 && pos[1] == '\r' && pos[2] == '\n')
539 assert(*pos == '\n');
544 if (!editor->bEmulateVersion10 && eol_len == 3)
546 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
548 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
552 if (!editor->bEmulateVersion10) {
554 eol_str = ME_MakeStringN(&cr, 1);
556 eol_str = ME_MakeStringN(str, eol_len);
559 p = &editor->pCursors[nCursor];
561 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
562 p = &editor->pCursors[nCursor];
564 tmp_style = ME_GetInsertStyle(editor, nCursor);
565 /* ME_SplitParagraph increases style refcount */
566 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, eol_str, 0);
567 p->pRun = ME_FindItemFwd(tp, diRun);
568 p->pPara = ME_GetParagraph(p->pRun);
569 end_run = ME_FindItemBack(tp, diRun);
570 ME_ReleaseStyle(end_run->member.run.style);
571 end_run->member.run.style = tmp_style;
582 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
584 ME_DisplayItem *pRun = pCursor->pRun;
588 if (!pCursor->nOffset)
590 ME_DisplayItem *pPara = pCursor->pPara;
592 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
600 if (pPara->member.para.prev_para->type == diTextStart)
602 pRun = ME_FindItemBack(pPara, diRunOrParagraph);
603 pPara = pPara->member.para.prev_para;
604 /* every paragraph ought to have at least one run */
605 assert(pRun && pRun->type == diRun);
606 assert(pRun->member.run.nFlags & MERF_ENDPARA);
609 assert(pRun->type != diRun && pRun->type != diParagraph);
612 } while (RUN_IS_HIDDEN(&pRun->member.run) ||
613 pRun->member.run.nFlags & MERF_HIDDEN);
614 pCursor->pPara = pPara;
615 pCursor->pRun = pRun;
616 if (pRun->member.run.nFlags & MERF_ENDPARA)
617 pCursor->nOffset = 0;
619 pCursor->nOffset = pRun->member.run.strText->nLen;
622 if (pCursor->nOffset)
623 pCursor->nOffset = pCursor->nOffset + nRelOfs;
628 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
630 int new_ofs = pCursor->nOffset + nRelOfs;
632 if (new_ofs < pRun->member.run.strText->nLen)
634 pCursor->nOffset = new_ofs;
639 pRun = ME_FindItemFwd(pRun, diRun);
640 } while (pRun && (RUN_IS_HIDDEN(&pRun->member.run) ||
641 pRun->member.run.nFlags & MERF_HIDDEN));
644 pCursor->pPara = ME_GetParagraph(pRun);
645 pCursor->pRun = pRun;
646 pCursor->nOffset = 0;
655 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
657 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
658 int nOffset = cursor->nOffset;
662 /* Backward movement */
665 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
666 nOffset, WB_MOVEWORDLEFT);
669 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
670 if (pOtherRun->type == diRun)
672 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
673 pOtherRun->member.run.strText->nLen - 1,
675 && !(pRun->member.run.nFlags & MERF_ENDPARA)
676 && !(cursor->pRun == pRun && cursor->nOffset == 0)
677 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
681 nOffset = pOtherRun->member.run.strText->nLen;
683 else if (pOtherRun->type == diParagraph)
685 if (cursor->pRun == pRun && cursor->nOffset == 0)
687 /* Skip empty start of table row paragraph */
688 if (pOtherRun->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
689 pOtherRun = pOtherRun->member.para.prev_para;
690 /* Paragraph breaks are treated as separate words */
691 if (pOtherRun->member.para.prev_para->type == diTextStart)
694 pRun = ME_FindItemBack(pOtherRun, diRun);
702 /* Forward movement */
703 BOOL last_delim = FALSE;
707 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
708 nOffset, WB_ISDELIMITER))
710 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
711 nOffset, WB_MOVEWORDRIGHT);
712 if (nOffset < pRun->member.run.strText->nLen)
714 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
715 if (pOtherRun->type == diRun)
717 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
718 nOffset - 1, WB_ISDELIMITER);
722 else if (pOtherRun->type == diParagraph)
724 if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
725 pOtherRun = pOtherRun->member.para.next_para;
726 if (cursor->pRun == pRun)
727 pRun = ME_FindItemFwd(pOtherRun, diRun);
733 if (cursor->pRun == pRun)
740 cursor->pPara = ME_GetParagraph(pRun);
742 cursor->nOffset = nOffset;
748 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
750 /* pCursor[0] is the end of the selection
751 * pCursor[1] is the start of the selection (or the position selection anchor)
752 * pCursor[2] and [3] are the selection anchors that are backed up
753 * so they are kept when the selection changes for drag selection.
756 editor->nSelectionType = selectionType;
757 switch(selectionType)
762 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
763 editor->pCursors[1] = editor->pCursors[0];
764 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
769 ME_DisplayItem *pItem;
770 ME_DIType fwdSearchType, backSearchType;
771 if (selectionType == stParagraph) {
772 backSearchType = diParagraph;
773 fwdSearchType = diParagraphOrEnd;
775 backSearchType = diStartRow;
776 fwdSearchType = diStartRowOrParagraphOrEnd;
778 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
780 if (pItem->type == diTextEnd)
781 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
783 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
784 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
785 editor->pCursors[0].nOffset = 0;
787 pItem = ME_FindItemBack(pItem, backSearchType);
788 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
789 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
790 editor->pCursors[1].nOffset = 0;
794 /* Select everything with cursor anchored from the start of the text */
795 editor->nSelectionType = stDocument;
796 editor->pCursors[1].pPara = editor->pBuffer->pFirst->member.para.next_para;
797 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pCursors[1].pPara, diRun);
798 editor->pCursors[1].nOffset = 0;
799 editor->pCursors[0].pPara = editor->pBuffer->pLast->member.para.prev_para;
800 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
801 editor->pCursors[0].nOffset = 0;
805 /* Store the anchor positions for extending the selection. */
806 editor->pCursors[2] = editor->pCursors[0];
807 editor->pCursors[3] = editor->pCursors[1];
810 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
812 ME_Cursor *pCursor = &editor->pCursors[nCursor];
813 return pCursor->pPara->member.para.nCharOfs
814 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
817 /* Helper function for ME_FindPixelPos to find paragraph within tables */
818 static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
819 ME_DisplayItem *para)
821 ME_DisplayItem *cell, *next_cell;
822 assert(para->member.para.nFlags & MEPF_ROWSTART);
823 cell = para->member.para.next_para->member.para.pCell;
826 /* find the cell we are in */
827 while ((next_cell = cell->member.cell.next_cell) != NULL) {
828 if (x < next_cell->member.cell.pt.x)
830 para = ME_FindItemFwd(cell, diParagraph);
831 /* Found the cell, but there might be multiple paragraphs in
832 * the cell, so need to search down the cell for the paragraph. */
833 while (cell == para->member.para.pCell) {
834 if (y < para->member.para.pt.y + para->member.para.nHeight)
836 if (para->member.para.nFlags & MEPF_ROWSTART)
837 return ME_FindPixelPosInTableRow(x, y, para);
841 para = para->member.para.next_para;
843 /* Past the end of the cell, so go back to the last cell paragraph */
844 return para->member.para.prev_para;
848 /* Return table row delimiter */
849 para = ME_FindItemFwd(cell, diParagraph);
850 assert(para->member.para.nFlags & MEPF_ROWEND);
851 assert(para->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
852 assert(para->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
856 static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found,
857 ME_Cursor *result, int rx, BOOL isExact)
860 assert(found->type == diRun);
861 if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0)
863 result->pRun = found;
864 result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run);
865 if (editor->pCursors[0].nOffset == found->member.run.strText->nLen && rx)
867 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
870 result->pPara = ME_GetParagraph(result->pRun);
874 /* Finds the run and offset from the pixel position.
876 * x & y are pixel positions in virtual coordinates into the rich edit control,
877 * so client coordinates must first be adjusted by the scroll position.
879 * returns TRUE if the result was exactly under the cursor, otherwise returns
880 * FALSE, and result is set to the closest position to the coordinates.
882 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
883 ME_Cursor *result, BOOL *is_eol)
885 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
886 ME_DisplayItem *last = NULL;
890 x -= editor->rcFormat.left;
891 y -= editor->rcFormat.top;
897 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
899 assert(p->type == diParagraph);
900 if (y < p->member.para.pt.y + p->member.para.nHeight)
902 if (p->member.para.nFlags & MEPF_ROWSTART)
903 p = ME_FindPixelPosInTableRow(x, y, p);
904 y -= p->member.para.pt.y;
905 p = ME_FindItemFwd(p, diStartRow);
907 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
908 p = ME_GetTableRowEnd(p);
912 for (; p != editor->pBuffer->pLast; )
915 assert(p->type == diStartRow);
916 if (y < p->member.row.pt.y + p->member.row.nHeight)
918 p = ME_FindItemFwd(p, diRun);
921 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
922 if (pp->type != diStartRow)
924 p = ME_FindItemFwd(p, diRun);
929 if (p == editor->pBuffer->pLast)
931 /* The position is below the last paragraph, so the last row will be used
932 * rather than the end of the text, so the x position will be used to
933 * determine the offset closest to the pixel position. */
935 p = ME_FindItemBack(p, diStartRow);
937 p = ME_FindItemFwd(p, diRun);
941 p = editor->pBuffer->pLast;
944 for (; p != editor->pBuffer->pLast; p = p->next)
949 rx = x - p->member.run.pt.x;
950 if (rx < p->member.run.nWidth)
951 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
955 p = ME_FindItemFwd(p, diRun);
956 if (is_eol) *is_eol = 1;
957 rx = 0; /* FIXME not sure */
958 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
963 rx = 0; /* FIXME not sure */
965 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
970 result->pRun = ME_FindItemBack(p, diRun);
971 result->pPara = ME_GetParagraph(result->pRun);
973 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
978 /* Returns the character offset closest to the pixel position
980 * x & y are pixel positions in client coordinates.
982 * isExact will be set to TRUE if the run is directly under the pixel
983 * position, FALSE if it not, unless isExact is set to NULL.
985 int ME_CharFromPos(ME_TextEditor *editor, int x, int y, BOOL *isExact)
991 ITextHost_TxGetClientRect(editor->texthost, &rc);
992 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
993 if (isExact) *isExact = FALSE;
996 x += editor->horz_si.nPos;
997 y += editor->vert_si.nPos;
998 bResult = ME_FindPixelPos(editor, x, y, &cursor, NULL);
999 if (isExact) *isExact = bResult;
1000 return cursor.pPara->member.para.nCharOfs
1001 + cursor.pRun->member.run.nCharOfs + cursor.nOffset;
1006 /* Extends the selection with a word, line, or paragraph selection type.
1008 * The selection is anchored by editor->pCursors[2-3] such that the text
1009 * between the anchors will remain selected, and one end will be extended.
1011 * editor->pCursors[0] should have the position to extend the selection to
1012 * before this function is called.
1014 * Nothing will be done if editor->nSelectionType equals stPosition.
1016 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1018 ME_Cursor tmp_cursor;
1019 int curOfs, anchorStartOfs, anchorEndOfs;
1020 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1022 curOfs = ME_GetCursorOfs(editor, 0);
1023 anchorStartOfs = ME_GetCursorOfs(editor, 3);
1024 anchorEndOfs = ME_GetCursorOfs(editor, 2);
1026 tmp_cursor = editor->pCursors[0];
1027 editor->pCursors[0] = editor->pCursors[2];
1028 editor->pCursors[1] = editor->pCursors[3];
1029 if (curOfs < anchorStartOfs)
1031 /* Extend the left side of selection */
1032 editor->pCursors[1] = tmp_cursor;
1033 if (editor->nSelectionType == stWord)
1034 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1037 ME_DisplayItem *pItem;
1038 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1039 diStartRowOrParagraph:diParagraph);
1040 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1041 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1042 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
1043 editor->pCursors[1].nOffset = 0;
1046 else if (curOfs >= anchorEndOfs)
1048 /* Extend the right side of selection */
1049 editor->pCursors[0] = tmp_cursor;
1050 if (editor->nSelectionType == stWord)
1051 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1054 ME_DisplayItem *pItem;
1055 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1056 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1057 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1058 if (pItem->type == diTextEnd)
1059 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1061 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1062 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
1063 editor->pCursors[0].nOffset = 0;
1068 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1070 ME_Cursor tmp_cursor;
1071 int is_selection = 0;
1074 editor->nUDArrowX = -1;
1076 x += editor->horz_si.nPos;
1077 y += editor->vert_si.nPos;
1079 tmp_cursor = editor->pCursors[0];
1080 is_selection = ME_IsSelection(editor);
1081 is_shift = GetKeyState(VK_SHIFT) < 0;
1083 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1085 if (x >= editor->rcFormat.left || is_shift)
1089 editor->pCursors[1] = editor->pCursors[0];
1091 if (x >= editor->rcFormat.left)
1092 ME_SelectByType(editor, stWord);
1094 ME_SelectByType(editor, stParagraph);
1095 } else if (clickNum % 2 == 0) {
1096 ME_SelectByType(editor, stWord);
1098 ME_SelectByType(editor, stParagraph);
1103 editor->nSelectionType = stPosition;
1104 editor->pCursors[1] = editor->pCursors[0];
1106 else if (!is_selection)
1108 editor->nSelectionType = stPosition;
1109 editor->pCursors[1] = tmp_cursor;
1111 else if (editor->nSelectionType != stPosition)
1113 ME_ExtendAnchorSelection(editor);
1119 ME_SelectByType(editor, stLine);
1120 } else if (clickNum % 2 == 0 || is_shift) {
1121 ME_SelectByType(editor, stParagraph);
1123 ME_SelectByType(editor, stDocument);
1126 ME_InvalidateSelection(editor);
1127 ITextHost_TxShowCaret(editor->texthost, FALSE);
1128 ME_ShowCaret(editor);
1129 ME_ClearTempStyle(editor);
1130 ME_SendSelChange(editor);
1133 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1135 ME_Cursor tmp_cursor;
1137 if (editor->nSelectionType == stDocument)
1139 x += editor->horz_si.nPos;
1140 y += editor->vert_si.nPos;
1142 tmp_cursor = editor->pCursors[0];
1143 /* FIXME: do something with the return value of ME_FindPixelPos */
1144 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1146 ME_InvalidateSelection(editor);
1147 editor->pCursors[0] = tmp_cursor;
1148 ME_ExtendAnchorSelection(editor);
1150 if (editor->nSelectionType != stPosition &&
1151 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1153 /* The scroll the cursor towards the other end, since it was the one
1154 * extended by ME_ExtendAnchorSelection */
1155 ME_EnsureVisible(editor, &editor->pCursors[1]);
1157 ME_EnsureVisible(editor, &editor->pCursors[0]);
1160 ME_InvalidateSelection(editor);
1161 ITextHost_TxShowCaret(editor->texthost, FALSE);
1162 ME_ShowCaret(editor);
1163 ME_SendSelChange(editor);
1166 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1167 int x, int *pOffset, int *pbCaretAtEnd)
1169 ME_DisplayItem *pNext, *pLastRun;
1170 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1171 assert(pNext->type == diRun);
1173 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1174 if (pOffset) *pOffset = 0;
1176 int run_x = pNext->member.run.pt.x;
1177 int width = pNext->member.run.nWidth;
1182 if (x >= run_x && x < run_x+width)
1184 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1185 ME_String *s = pNext->member.run.strText;
1193 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1194 } while(pNext && pNext->type == diRun);
1196 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1198 pNext = ME_FindItemFwd(pNext, diRun);
1199 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1206 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1208 ME_DisplayItem *pRun = pCursor->pRun;
1211 if (editor->nUDArrowX != -1)
1212 x = editor->nUDArrowX;
1214 if (editor->bCaretAtEnd)
1216 pRun = ME_FindItemBack(pRun, diRun);
1218 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1221 x = pRun->member.run.pt.x;
1222 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1224 editor->nUDArrowX = x;
1231 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1233 ME_DisplayItem *pRun = pCursor->pRun;
1234 ME_DisplayItem *pItem, *pOldPara, *pNewPara;
1235 int x = ME_GetXForArrow(editor, pCursor);
1237 if (editor->bCaretAtEnd && !pCursor->nOffset)
1238 pRun = ME_FindItemBack(pRun, diRun);
1241 pOldPara = ME_GetParagraph(pRun);
1244 /* start of this row */
1245 pItem = ME_FindItemBack(pRun, diStartRow);
1247 /* start of the previous row */
1248 pItem = ME_FindItemBack(pItem, diStartRow);
1250 return; /* row not found - ignore */
1251 pNewPara = ME_GetParagraph(pItem);
1252 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1253 (pOldPara->member.para.pCell &&
1254 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1256 /* Brought out of a cell */
1257 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1258 if (pNewPara->type == diTextStart)
1259 return; /* At the top, so don't go anywhere. */
1260 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1262 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1264 /* Brought into a table row */
1265 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1266 while (x < cell->pt.x && cell->prev_cell)
1267 cell = &cell->prev_cell->member.cell;
1268 if (cell->next_cell) /* else - we are still at the end of the row */
1269 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1274 /* start of the next row */
1275 pItem = ME_FindItemFwd(pRun, diStartRow);
1277 return; /* row not found - ignore */
1278 pNewPara = ME_GetParagraph(pItem);
1279 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1280 (pOldPara->member.para.pCell &&
1281 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1283 /* Brought out of a cell */
1284 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1285 if (pNewPara->type == diTextEnd)
1286 return; /* At the bottom, so don't go anywhere. */
1287 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1289 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1291 /* Brought into a table row */
1292 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1293 while (cell->member.cell.next_cell &&
1294 x >= cell->member.cell.next_cell->member.cell.pt.x)
1295 cell = cell->member.cell.next_cell;
1296 pItem = ME_FindItemFwd(cell, diStartRow);
1301 /* row not found - ignore */
1304 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1305 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1306 assert(pCursor->pRun);
1307 assert(pCursor->pRun->type == diRun);
1310 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1312 ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
1314 if (editor->vert_si.nPos < p->member.row.nHeight)
1316 pCursor->pPara = editor->pBuffer->pFirst->member.para.next_para;
1317 pCursor->pRun = ME_FindItemFwd(pCursor->pPara, diRun);
1318 pCursor->nOffset = 0;
1319 editor->bCaretAtEnd = FALSE;
1320 /* Native clears seems to clear this x value on page up at the top
1321 * of the text, but not on page down at the end of the text.
1322 * Doesn't make sense, but we try to be bug for bug compatible. */
1323 editor->nUDArrowX = -1;
1325 ME_DisplayItem *pRun = pCursor->pRun;
1326 ME_DisplayItem *pLast;
1327 int x, y, ys, yd, yp, yprev;
1328 int yOldScrollPos = editor->vert_si.nPos;
1330 x = ME_GetXForArrow(editor, pCursor);
1331 if (!pCursor->nOffset && editor->bCaretAtEnd)
1332 pRun = ME_FindItemBack(pRun, diRun);
1334 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1335 assert(p->type == diStartRow);
1336 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1337 yprev = ys = y = yp + p->member.row.pt.y;
1339 ME_ScrollUp(editor, editor->sizeWindow.cy);
1340 /* Only move the cursor by the amount scrolled. */
1341 yd = y + editor->vert_si.nPos - yOldScrollPos;
1345 p = ME_FindItemBack(p, diStartRowOrParagraph);
1348 if (p->type == diParagraph) { /* crossing paragraphs */
1349 if (p->member.para.prev_para == NULL)
1351 yp = p->member.para.prev_para->member.para.pt.y;
1354 y = yp + p->member.row.pt.y;
1361 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1362 &editor->bCaretAtEnd);
1363 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1365 assert(pCursor->pRun);
1366 assert(pCursor->pRun->type == diRun);
1369 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1371 ME_DisplayItem *pLast;
1374 /* Find y position of the last row */
1375 pLast = editor->pBuffer->pLast;
1376 y = pLast->member.para.prev_para->member.para.pt.y
1377 + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
1379 x = ME_GetXForArrow(editor, pCursor);
1381 if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
1383 pCursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
1384 pCursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
1385 pCursor->nOffset = 0;
1386 editor->bCaretAtEnd = FALSE;
1388 ME_DisplayItem *pRun = pCursor->pRun;
1390 int ys, yd, yp, yprev;
1391 int yOldScrollPos = editor->vert_si.nPos;
1393 if (!pCursor->nOffset && editor->bCaretAtEnd)
1394 pRun = ME_FindItemBack(pRun, diRun);
1396 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1397 assert(p->type == diStartRow);
1398 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1399 yprev = ys = y = yp + p->member.row.pt.y;
1401 /* For native richedit controls:
1402 * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
1403 * v4.1 can scroll past this position here. */
1404 ME_ScrollDown(editor, editor->sizeWindow.cy);
1405 /* Only move the cursor by the amount scrolled. */
1406 yd = y + editor->vert_si.nPos - yOldScrollPos;
1410 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1413 if (p->type == diParagraph) {
1414 yp = p->member.para.pt.y;
1417 y = yp + p->member.row.pt.y;
1424 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1425 &editor->bCaretAtEnd);
1426 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
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);
1436 ME_DisplayItem *pRun;
1437 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1438 pRow = ME_FindItemBack(pRow, diStartRow);
1442 pRun = ME_FindItemFwd(pRow, diRun);
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 pCursor->pPara = editor->pBuffer->pFirst->member.para.next_para;
1455 pCursor->pRun = ME_FindItemFwd(pCursor->pPara, diRun);
1456 pCursor->nOffset = 0;
1457 editor->bCaretAtEnd = FALSE;
1460 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1462 ME_DisplayItem *pRow;
1464 if (editor->bCaretAtEnd && !pCursor->nOffset)
1467 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1469 if (pRow->type == diStartRow) {
1470 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1472 pCursor->pRun = pRun;
1473 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1474 pCursor->nOffset = 0;
1475 editor->bCaretAtEnd = TRUE;
1478 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1479 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1480 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1481 pCursor->nOffset = 0;
1482 editor->bCaretAtEnd = FALSE;
1485 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1487 pCursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
1488 pCursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
1489 assert(pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1490 pCursor->nOffset = 0;
1491 editor->bCaretAtEnd = FALSE;
1494 BOOL ME_IsSelection(ME_TextEditor *editor)
1496 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1499 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1501 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1509 void ME_DeleteSelection(ME_TextEditor *editor)
1512 ME_GetSelection(editor, &from, &to);
1513 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1516 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1518 return ME_GetInsertStyle(editor, 0);
1521 void ME_SendSelChange(ME_TextEditor *editor)
1525 if (!(editor->nEventMask & ENM_SELCHANGE))
1528 sc.nmhdr.code = EN_SELCHANGE;
1529 ME_GetSelection(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) /* wth 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);