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.strText->nLen,
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.strText->nLen;
322 run = &c.pRun->member.run;
323 if (run->nFlags & MERF_ENDPARA) {
324 int eollen = c.pRun->member.run.strText->nLen;
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->strText->nLen);
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, run->strText->szData + c.nOffset, nCharsToDelete, run->nFlags, run->style );
385 TRACE("Post deletion string: %s (%d)\n", debugstr_run( run ), run->strText->nLen);
386 TRACE("Shift value: %d\n", shift);
387 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
389 /* update cursors (including c) */
390 for (i=-1; i<editor->nCursors; i++) {
391 ME_Cursor *pThisCur = editor->pCursors + i;
392 if (i == -1) pThisCur = &c;
393 if (pThisCur->pRun == cursor.pRun) {
394 if (pThisCur->nOffset > cursor.nOffset) {
395 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
396 pThisCur->nOffset = cursor.nOffset;
398 pThisCur->nOffset -= nCharsToDelete;
399 assert(pThisCur->nOffset >= 0);
400 assert(pThisCur->nOffset <= run->strText->nLen);
402 if (pThisCur->nOffset == run->strText->nLen)
404 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
405 assert(pThisCur->pRun->type == diRun);
406 pThisCur->nOffset = 0;
411 /* c = updated data now */
413 if (c.pRun == cursor.pRun)
414 ME_SkipAndPropagateCharOffset(c.pRun, shift);
416 ME_PropagateCharOffset(c.pRun, shift);
418 if (!cursor.pRun->member.run.strText->nLen)
420 TRACE("Removing useless run\n");
421 ME_Remove(cursor.pRun);
422 ME_DestroyDisplayItem(cursor.pRun);
427 ME_CheckCharOffsets(editor);
435 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
437 assert(nCursor>=0 && nCursor<editor->nCursors);
438 /* text operations set modified state */
439 editor->nModifyStep = 1;
440 return ME_InternalDeleteText(editor, &editor->pCursors[nCursor],
444 static ME_DisplayItem *
445 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
446 const WCHAR *str, int len, ME_Style *style,
449 ME_Cursor *p = &editor->pCursors[nCursor];
451 editor->bCaretAtEnd = FALSE;
453 assert(p->pRun->type == diRun);
455 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
459 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
461 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
466 if (ME_IsSelection(editor))
467 ME_DeleteSelection(editor);
469 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
471 di->member.run.ole_obj = ALLOC_OBJ(*reo);
472 ME_CopyReObject(di->member.run.ole_obj, reo);
473 ME_ReleaseStyle(pStyle);
477 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
479 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
483 if (ME_IsSelection(editor))
484 ME_DeleteSelection(editor);
486 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
488 ME_ReleaseStyle(pStyle);
492 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
493 const WCHAR *str, int len, ME_Style *style)
499 /* FIXME really HERE ? */
500 if (ME_IsSelection(editor))
501 ME_DeleteSelection(editor);
503 /* FIXME: is this too slow? */
504 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
505 oldLen = ME_GetTextLength(editor);
507 /* text operations set modified state */
508 editor->nModifyStep = 1;
512 assert(nCursor>=0 && nCursor<editor->nCursors);
516 /* grow the text limit to fit our text */
517 if(editor->nTextLimit < oldLen +len)
518 editor->nTextLimit = oldLen + len;
524 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
525 while(pos - str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
528 if (pos != str) { /* handle text */
529 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
530 } else if (*pos == '\t') { /* handle tabs */
532 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
534 } else { /* handle EOLs */
535 ME_DisplayItem *tp, *end_run;
539 /* Find number of CR and LF in end of paragraph run */
542 if (len > 1 && pos[1] == '\n')
544 else if (len > 2 && pos[1] == '\r' && pos[2] == '\n')
549 assert(*pos == '\n');
554 if (!editor->bEmulateVersion10 && eol_len == 3)
556 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
558 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
562 if (!editor->bEmulateVersion10) {
564 eol_str = ME_MakeStringN(&cr, 1);
566 eol_str = ME_MakeStringN(str, eol_len);
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, 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.strText->nLen) {
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.strText->nLen;
639 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
640 } while (cursor->nOffset >= cursor->pRun->member.run.strText->nLen);
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.strText->nLen)
662 cursor->nOffset -= cursor->pRun->member.run.strText->nLen;
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, pRun->member.run.strText,
683 nOffset, WB_MOVEWORDLEFT);
686 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
687 if (pOtherRun->type == diRun)
689 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
690 pOtherRun->member.run.strText->nLen - 1,
692 && !(pRun->member.run.nFlags & MERF_ENDPARA)
693 && !(cursor->pRun == pRun && cursor->nOffset == 0)
694 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
698 nOffset = pOtherRun->member.run.strText->nLen;
700 else if (pOtherRun->type == diParagraph)
702 if (cursor->pRun == pRun && cursor->nOffset == 0)
705 /* Skip empty start of table row paragraph */
706 if (pPara->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
707 pPara = pPara->member.para.prev_para;
708 /* Paragraph breaks are treated as separate words */
709 if (pPara->member.para.prev_para->type == diTextStart)
712 pRun = ME_FindItemBack(pPara, diRun);
713 pPara = pPara->member.para.prev_para;
721 /* Forward movement */
722 BOOL last_delim = FALSE;
726 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
727 nOffset, WB_ISDELIMITER))
729 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
730 nOffset, WB_MOVEWORDRIGHT);
731 if (nOffset < pRun->member.run.strText->nLen)
733 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
734 if (pOtherRun->type == diRun)
736 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
737 nOffset - 1, WB_ISDELIMITER);
741 else if (pOtherRun->type == diParagraph)
743 if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
744 pOtherRun = pOtherRun->member.para.next_para;
745 if (cursor->pRun == pRun) {
747 pRun = ME_FindItemFwd(pPara, diRun);
754 if (cursor->pRun == pRun)
761 cursor->pPara = pPara;
763 cursor->nOffset = nOffset;
769 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
771 /* pCursor[0] is the end of the selection
772 * pCursor[1] is the start of the selection (or the position selection anchor)
773 * pCursor[2] and [3] are the selection anchors that are backed up
774 * so they are kept when the selection changes for drag selection.
777 editor->nSelectionType = selectionType;
778 switch(selectionType)
783 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
784 editor->pCursors[1] = editor->pCursors[0];
785 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
790 ME_DisplayItem *pItem;
791 ME_DIType fwdSearchType, backSearchType;
792 if (selectionType == stParagraph) {
793 backSearchType = diParagraph;
794 fwdSearchType = diParagraphOrEnd;
796 backSearchType = diStartRow;
797 fwdSearchType = diStartRowOrParagraphOrEnd;
799 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
801 if (pItem->type == diTextEnd)
802 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
804 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
805 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
806 editor->pCursors[0].nOffset = 0;
808 pItem = ME_FindItemBack(pItem, backSearchType);
809 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
810 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
811 editor->pCursors[1].nOffset = 0;
815 /* Select everything with cursor anchored from the start of the text */
816 editor->nSelectionType = stDocument;
817 ME_SetCursorToStart(editor, &editor->pCursors[1]);
818 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
822 /* Store the anchor positions for extending the selection. */
823 editor->pCursors[2] = editor->pCursors[0];
824 editor->pCursors[3] = editor->pCursors[1];
827 int ME_GetCursorOfs(const ME_Cursor *cursor)
829 return cursor->pPara->member.para.nCharOfs
830 + cursor->pRun->member.run.nCharOfs + cursor->nOffset;
833 /* Helper function for ME_FindPixelPos to find paragraph within tables */
834 static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
835 ME_DisplayItem *para)
837 ME_DisplayItem *cell, *next_cell;
838 assert(para->member.para.nFlags & MEPF_ROWSTART);
839 cell = para->member.para.next_para->member.para.pCell;
842 /* find the cell we are in */
843 while ((next_cell = cell->member.cell.next_cell) != NULL) {
844 if (x < next_cell->member.cell.pt.x)
846 para = ME_FindItemFwd(cell, diParagraph);
847 /* Found the cell, but there might be multiple paragraphs in
848 * the cell, so need to search down the cell for the paragraph. */
849 while (cell == para->member.para.pCell) {
850 if (y < para->member.para.pt.y + para->member.para.nHeight)
852 if (para->member.para.nFlags & MEPF_ROWSTART)
853 return ME_FindPixelPosInTableRow(x, y, para);
857 para = para->member.para.next_para;
859 /* Past the end of the cell, so go back to the last cell paragraph */
860 return para->member.para.prev_para;
864 /* Return table row delimiter */
865 para = ME_FindItemFwd(cell, diParagraph);
866 assert(para->member.para.nFlags & MEPF_ROWEND);
867 assert(para->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
868 assert(para->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
872 static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found,
873 ME_Cursor *result, int rx, BOOL isExact)
876 assert(found->type == diRun);
877 if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0)
879 result->pRun = found;
880 result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run);
881 if (result->nOffset == found->member.run.strText->nLen && rx)
883 result->pRun = ME_FindItemFwd(result->pRun, diRun);
886 result->pPara = ME_GetParagraph(result->pRun);
890 /* Finds the run and offset from the pixel position.
892 * x & y are pixel positions in virtual coordinates into the rich edit control,
893 * so client coordinates must first be adjusted by the scroll position.
895 * returns TRUE if the result was exactly under the cursor, otherwise returns
896 * FALSE, and result is set to the closest position to the coordinates.
898 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
899 ME_Cursor *result, BOOL *is_eol)
901 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
902 ME_DisplayItem *last = NULL;
906 x -= editor->rcFormat.left;
907 y -= editor->rcFormat.top;
913 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
915 assert(p->type == diParagraph);
916 if (y < p->member.para.pt.y + p->member.para.nHeight)
918 if (p->member.para.nFlags & MEPF_ROWSTART)
919 p = ME_FindPixelPosInTableRow(x, y, p);
920 y -= p->member.para.pt.y;
921 p = ME_FindItemFwd(p, diStartRow);
923 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
924 p = ME_GetTableRowEnd(p);
928 for (; p != editor->pBuffer->pLast; )
931 assert(p->type == diStartRow);
932 if (y < p->member.row.pt.y + p->member.row.nHeight)
934 p = ME_FindItemFwd(p, diRun);
937 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
938 if (pp->type != diStartRow)
940 p = ME_FindItemFwd(p, diRun);
945 if (p == editor->pBuffer->pLast)
947 /* The position is below the last paragraph, so the last row will be used
948 * rather than the end of the text, so the x position will be used to
949 * determine the offset closest to the pixel position. */
951 p = ME_FindItemBack(p, diStartRow);
953 p = ME_FindItemFwd(p, diRun);
957 p = editor->pBuffer->pLast;
960 for (; p != editor->pBuffer->pLast; p = p->next)
965 rx = x - p->member.run.pt.x;
966 if (rx < p->member.run.nWidth)
967 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
971 p = ME_FindItemFwd(p, diRun);
972 if (is_eol) *is_eol = 1;
973 rx = 0; /* FIXME not sure */
974 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
979 rx = 0; /* FIXME not sure */
981 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
986 result->pRun = ME_FindItemBack(p, diRun);
987 result->pPara = ME_GetParagraph(result->pRun);
989 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
994 /* Sets the cursor to the position closest to the pixel position
996 * x & y are pixel positions in client coordinates.
998 * isExact will be set to TRUE if the run is directly under the pixel
999 * position, FALSE if it not, unless isExact is set to NULL.
1001 * return FALSE if outside client area and the cursor is not set,
1002 * otherwise TRUE is returned.
1004 BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y,
1005 ME_Cursor *cursor, BOOL *isExact)
1010 ITextHost_TxGetClientRect(editor->texthost, &rc);
1011 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
1012 if (isExact) *isExact = FALSE;
1015 x += editor->horz_si.nPos;
1016 y += editor->vert_si.nPos;
1017 bResult = ME_FindPixelPos(editor, x, y, cursor, NULL);
1018 if (isExact) *isExact = bResult;
1024 /* Extends the selection with a word, line, or paragraph selection type.
1026 * The selection is anchored by editor->pCursors[2-3] such that the text
1027 * between the anchors will remain selected, and one end will be extended.
1029 * editor->pCursors[0] should have the position to extend the selection to
1030 * before this function is called.
1032 * Nothing will be done if editor->nSelectionType equals stPosition.
1034 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1036 ME_Cursor tmp_cursor;
1037 int curOfs, anchorStartOfs, anchorEndOfs;
1038 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1040 curOfs = ME_GetCursorOfs(&editor->pCursors[0]);
1041 anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]);
1042 anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]);
1044 tmp_cursor = editor->pCursors[0];
1045 editor->pCursors[0] = editor->pCursors[2];
1046 editor->pCursors[1] = editor->pCursors[3];
1047 if (curOfs < anchorStartOfs)
1049 /* Extend the left side of selection */
1050 editor->pCursors[1] = tmp_cursor;
1051 if (editor->nSelectionType == stWord)
1052 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1055 ME_DisplayItem *pItem;
1056 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1057 diStartRowOrParagraph:diParagraph);
1058 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1059 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1060 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
1061 editor->pCursors[1].nOffset = 0;
1064 else if (curOfs >= anchorEndOfs)
1066 /* Extend the right side of selection */
1067 editor->pCursors[0] = tmp_cursor;
1068 if (editor->nSelectionType == stWord)
1069 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1072 ME_DisplayItem *pItem;
1073 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1074 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1075 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1076 if (pItem->type == diTextEnd)
1077 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1079 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1080 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
1081 editor->pCursors[0].nOffset = 0;
1086 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1088 ME_Cursor tmp_cursor;
1089 int is_selection = 0;
1092 editor->nUDArrowX = -1;
1094 x += editor->horz_si.nPos;
1095 y += editor->vert_si.nPos;
1097 tmp_cursor = editor->pCursors[0];
1098 is_selection = ME_IsSelection(editor);
1099 is_shift = GetKeyState(VK_SHIFT) < 0;
1101 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1103 if (x >= editor->rcFormat.left || is_shift)
1107 editor->pCursors[1] = editor->pCursors[0];
1109 if (x >= editor->rcFormat.left)
1110 ME_SelectByType(editor, stWord);
1112 ME_SelectByType(editor, stParagraph);
1113 } else if (clickNum % 2 == 0) {
1114 ME_SelectByType(editor, stWord);
1116 ME_SelectByType(editor, stParagraph);
1121 editor->nSelectionType = stPosition;
1122 editor->pCursors[1] = editor->pCursors[0];
1124 else if (!is_selection)
1126 editor->nSelectionType = stPosition;
1127 editor->pCursors[1] = tmp_cursor;
1129 else if (editor->nSelectionType != stPosition)
1131 ME_ExtendAnchorSelection(editor);
1137 ME_SelectByType(editor, stLine);
1138 } else if (clickNum % 2 == 0 || is_shift) {
1139 ME_SelectByType(editor, stParagraph);
1141 ME_SelectByType(editor, stDocument);
1144 ME_InvalidateSelection(editor);
1145 ITextHost_TxShowCaret(editor->texthost, FALSE);
1146 ME_ShowCaret(editor);
1147 ME_ClearTempStyle(editor);
1148 ME_SendSelChange(editor);
1151 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1153 ME_Cursor tmp_cursor;
1155 if (editor->nSelectionType == stDocument)
1157 x += editor->horz_si.nPos;
1158 y += editor->vert_si.nPos;
1160 tmp_cursor = editor->pCursors[0];
1161 /* FIXME: do something with the return value of ME_FindPixelPos */
1162 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1164 ME_InvalidateSelection(editor);
1165 editor->pCursors[0] = tmp_cursor;
1166 ME_ExtendAnchorSelection(editor);
1168 if (editor->nSelectionType != stPosition &&
1169 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1171 /* The scroll the cursor towards the other end, since it was the one
1172 * extended by ME_ExtendAnchorSelection */
1173 ME_EnsureVisible(editor, &editor->pCursors[1]);
1175 ME_EnsureVisible(editor, &editor->pCursors[0]);
1178 ME_InvalidateSelection(editor);
1179 ITextHost_TxShowCaret(editor->texthost, FALSE);
1180 ME_ShowCaret(editor);
1181 ME_SendSelChange(editor);
1184 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1185 int x, int *pOffset, int *pbCaretAtEnd)
1187 ME_DisplayItem *pNext, *pLastRun;
1188 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1189 assert(pNext->type == diRun);
1190 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1191 if (pOffset) *pOffset = 0;
1193 int run_x = pNext->member.run.pt.x;
1194 int width = pNext->member.run.nWidth;
1199 if (x >= run_x && x < run_x+width)
1201 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1202 ME_String *s = pNext->member.run.strText;
1210 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1211 } while(pNext && pNext->type == diRun);
1213 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1215 pNext = ME_FindItemFwd(pNext, diRun);
1216 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1223 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1225 ME_DisplayItem *pRun = pCursor->pRun;
1228 if (editor->nUDArrowX != -1)
1229 x = editor->nUDArrowX;
1231 if (editor->bCaretAtEnd)
1233 pRun = ME_FindItemBack(pRun, diRun);
1235 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1238 x = pRun->member.run.pt.x;
1239 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1241 editor->nUDArrowX = x;
1248 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1250 ME_DisplayItem *pRun = pCursor->pRun;
1251 ME_DisplayItem *pOldPara = pCursor->pPara;
1252 ME_DisplayItem *pItem, *pNewPara;
1253 int x = ME_GetXForArrow(editor, pCursor);
1255 if (editor->bCaretAtEnd && !pCursor->nOffset)
1256 if (!ME_PrevRun(&pOldPara, &pRun))
1261 /* start of this row */
1262 pItem = ME_FindItemBack(pRun, diStartRow);
1264 /* start of the previous row */
1265 pItem = ME_FindItemBack(pItem, diStartRow);
1267 return; /* row not found - ignore */
1268 pNewPara = ME_GetParagraph(pItem);
1269 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1270 (pOldPara->member.para.pCell &&
1271 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1273 /* Brought out of a cell */
1274 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1275 if (pNewPara->type == diTextStart)
1276 return; /* At the top, so don't go anywhere. */
1277 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1279 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1281 /* Brought into a table row */
1282 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1283 while (x < cell->pt.x && cell->prev_cell)
1284 cell = &cell->prev_cell->member.cell;
1285 if (cell->next_cell) /* else - we are still at the end of the row */
1286 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1291 /* start of the next row */
1292 pItem = ME_FindItemFwd(pRun, diStartRow);
1294 return; /* row not found - ignore */
1295 pNewPara = ME_GetParagraph(pItem);
1296 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1297 (pOldPara->member.para.pCell &&
1298 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1300 /* Brought out of a cell */
1301 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1302 if (pNewPara->type == diTextEnd)
1303 return; /* At the bottom, so don't go anywhere. */
1304 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1306 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1308 /* Brought into a table row */
1309 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1310 while (cell->member.cell.next_cell &&
1311 x >= cell->member.cell.next_cell->member.cell.pt.x)
1312 cell = cell->member.cell.next_cell;
1313 pItem = ME_FindItemFwd(cell, diStartRow);
1318 /* row not found - ignore */
1321 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1322 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1323 assert(pCursor->pRun);
1324 assert(pCursor->pRun->type == diRun);
1327 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1329 ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
1331 if (editor->vert_si.nPos < p->member.row.nHeight)
1333 ME_SetCursorToStart(editor, pCursor);
1334 editor->bCaretAtEnd = FALSE;
1335 /* Native clears seems to clear this x value on page up at the top
1336 * of the text, but not on page down at the end of the text.
1337 * Doesn't make sense, but we try to be bug for bug compatible. */
1338 editor->nUDArrowX = -1;
1340 ME_DisplayItem *pRun = pCursor->pRun;
1341 ME_DisplayItem *pLast;
1343 int yOldScrollPos = editor->vert_si.nPos;
1345 x = ME_GetXForArrow(editor, pCursor);
1346 if (!pCursor->nOffset && editor->bCaretAtEnd)
1347 pRun = ME_FindItemBack(pRun, diRun);
1349 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1350 assert(p->type == diStartRow);
1351 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1352 y = yp + p->member.row.pt.y;
1354 ME_ScrollUp(editor, editor->sizeWindow.cy);
1355 /* Only move the cursor by the amount scrolled. */
1356 yd = y + editor->vert_si.nPos - yOldScrollPos;
1360 p = ME_FindItemBack(p, diStartRowOrParagraph);
1363 if (p->type == diParagraph) { /* crossing paragraphs */
1364 if (p->member.para.prev_para == NULL)
1366 yp = p->member.para.prev_para->member.para.pt.y;
1369 y = yp + p->member.row.pt.y;
1375 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1376 &editor->bCaretAtEnd);
1377 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1379 assert(pCursor->pRun);
1380 assert(pCursor->pRun->type == diRun);
1383 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1385 ME_DisplayItem *pLast;
1388 /* Find y position of the last row */
1389 pLast = editor->pBuffer->pLast;
1390 y = pLast->member.para.prev_para->member.para.pt.y
1391 + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
1393 x = ME_GetXForArrow(editor, pCursor);
1395 if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
1397 ME_SetCursorToEnd(editor, pCursor);
1398 editor->bCaretAtEnd = FALSE;
1400 ME_DisplayItem *pRun = pCursor->pRun;
1403 int yOldScrollPos = editor->vert_si.nPos;
1405 if (!pCursor->nOffset && editor->bCaretAtEnd)
1406 pRun = ME_FindItemBack(pRun, diRun);
1408 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1409 assert(p->type == diStartRow);
1410 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1411 y = yp + p->member.row.pt.y;
1413 /* For native richedit controls:
1414 * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
1415 * v4.1 can scroll past this position here. */
1416 ME_ScrollDown(editor, editor->sizeWindow.cy);
1417 /* Only move the cursor by the amount scrolled. */
1418 yd = y + editor->vert_si.nPos - yOldScrollPos;
1422 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1425 if (p->type == diParagraph) {
1426 yp = p->member.para.pt.y;
1429 y = yp + p->member.row.pt.y;
1435 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1436 &editor->bCaretAtEnd);
1437 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1439 assert(pCursor->pRun);
1440 assert(pCursor->pRun->type == diRun);
1443 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1445 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1447 ME_DisplayItem *pRun;
1448 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1449 pRow = ME_FindItemBack(pRow, diStartRow);
1453 pRun = ME_FindItemFwd(pRow, diRun);
1455 pCursor->pRun = pRun;
1456 assert(pCursor->pPara == ME_GetParagraph(pRun));
1457 pCursor->nOffset = 0;
1460 editor->bCaretAtEnd = FALSE;
1463 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1465 ME_SetCursorToStart(editor, pCursor);
1466 editor->bCaretAtEnd = FALSE;
1469 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1471 ME_DisplayItem *pRow;
1473 if (editor->bCaretAtEnd && !pCursor->nOffset)
1476 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1478 if (pRow->type == diStartRow) {
1479 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1481 pCursor->pRun = pRun;
1482 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1483 pCursor->nOffset = 0;
1484 editor->bCaretAtEnd = TRUE;
1487 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1488 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1489 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1490 pCursor->nOffset = 0;
1491 editor->bCaretAtEnd = FALSE;
1494 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1496 ME_SetCursorToEnd(editor, pCursor);
1497 editor->bCaretAtEnd = FALSE;
1500 BOOL ME_IsSelection(ME_TextEditor *editor)
1502 return editor->pCursors[0].pRun != editor->pCursors[1].pRun ||
1503 editor->pCursors[0].nOffset != editor->pCursors[1].nOffset;
1506 void ME_DeleteSelection(ME_TextEditor *editor)
1509 int nStartCursor = ME_GetSelectionOfs(editor, &from, &to);
1510 ME_DeleteTextAtCursor(editor, nStartCursor, to - from);
1513 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1515 return ME_GetInsertStyle(editor, 0);
1518 void ME_SendSelChange(ME_TextEditor *editor)
1522 if (!(editor->nEventMask & ENM_SELCHANGE))
1525 sc.nmhdr.hwndFrom = NULL;
1526 sc.nmhdr.idFrom = 0;
1527 sc.nmhdr.code = EN_SELCHANGE;
1528 ME_GetSelectionOfs(editor, &sc.chrg.cpMin, &sc.chrg.cpMax);
1529 sc.seltyp = SEL_EMPTY;
1530 if (sc.chrg.cpMin != sc.chrg.cpMax)
1531 sc.seltyp |= SEL_TEXT;
1532 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* what were RICHEDIT authors thinking ? */
1533 sc.seltyp |= SEL_MULTICHAR;
1534 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1535 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1536 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1537 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1538 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1540 ME_ClearTempStyle(editor);
1542 editor->notified_cr = sc.chrg;
1543 ITextHost_TxNotify(editor->texthost, sc.nmhdr.code, &sc);
1548 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1551 ME_Cursor *p = &editor->pCursors[nCursor];
1552 ME_Cursor tmp_curs = *p;
1553 BOOL success = FALSE;
1555 ME_CheckCharOffsets(editor);
1558 editor->bCaretAtEnd = 0;
1560 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1562 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1565 editor->bCaretAtEnd = 0;
1567 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1569 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1572 ME_MoveCursorLines(editor, &tmp_curs, -1);
1575 ME_MoveCursorLines(editor, &tmp_curs, +1);
1578 ME_ArrowPageUp(editor, &tmp_curs);
1581 ME_ArrowPageDown(editor, &tmp_curs);
1585 ME_ArrowCtrlHome(editor, &tmp_curs);
1587 ME_ArrowHome(editor, &tmp_curs);
1588 editor->bCaretAtEnd = 0;
1593 ME_ArrowCtrlEnd(editor, &tmp_curs);
1595 ME_ArrowEnd(editor, &tmp_curs);
1600 editor->pCursors[1] = tmp_curs;
1603 ME_InvalidateSelection(editor);
1605 ITextHost_TxShowCaret(editor->texthost, FALSE);
1606 ME_EnsureVisible(editor, &tmp_curs);
1607 ME_ShowCaret(editor);
1608 ME_SendSelChange(editor);