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);
31 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
33 *from = ME_GetCursorOfs(editor, 0);
34 *to = ME_GetCursorOfs(editor, 1);
44 int ME_GetTextLength(ME_TextEditor *editor)
46 return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0);
50 int ME_GetTextLengthEx(ME_TextEditor *editor, GETTEXTLENGTHEX *how)
54 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
56 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
59 length = ME_GetTextLength(editor);
61 if (how->flags & GTL_USECRLF)
62 length += editor->nParagraphs;
64 if (how->flags & GTL_NUMBYTES)
68 if (how->codepage == 1200)
70 if (how->flags & GTL_PRECISE)
71 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
72 if (GetCPInfo(how->codepage, &cpinfo))
73 return length * cpinfo.MaxCharSize;
74 ERR("Invalid codepage %u\n", how->codepage);
81 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
84 const int len = ME_GetTextLength(editor);
86 /* all negative values are effectively the same */
93 if (from == 0 && to == -1)
95 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
96 editor->pCursors[1].nOffset = 0;
97 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
98 editor->pCursors[0].nOffset = 0;
99 ME_InvalidateSelection(editor);
100 ME_ClearTempStyle(editor);
104 /* if both values are equal and also out of bound, that means to */
105 /* put the selection at the end of the text */
106 if ((from == to) && (to < 0 || to > len))
112 /* if from is negative and to is positive then selection is */
113 /* deselected and caret moved to end of the current selection */
117 ME_GetSelection(editor, &start, &end);
118 editor->pCursors[1] = editor->pCursors[0];
120 ME_ClearTempStyle(editor);
124 /* adjust to if it's a negative value */
128 /* flip from and to if they are reversed */
136 /* after fiddling with the values, we find from > len && to > len */
139 /* special case with to too big */
146 editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
147 editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0;
148 ME_InvalidateSelection(editor);
149 ME_ClearTempStyle(editor);
153 ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
154 ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
160 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
161 int *x, int *y, int *height)
163 ME_DisplayItem *pCursorRun = pCursor->pRun;
164 ME_DisplayItem *pSizeRun = pCursor->pRun;
166 assert(!pCursor->nOffset || !editor->bCaretAtEnd);
167 assert(height && x && y);
168 assert(!(ME_GetParagraph(pCursorRun)->member.para.nFlags & MEPF_REWRAP));
169 assert(pCursor->pRun);
170 assert(pCursor->pRun->type == diRun);
172 if (pCursorRun->type == diRun) {
173 ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
176 HDC hDC = GetDC(editor->hWnd);
178 ME_DisplayItem *run = pCursorRun;
179 ME_DisplayItem *para = NULL;
182 ME_InitContext(&c, editor, hDC);
184 if (!pCursor->nOffset && !editor->bCaretAtEnd)
186 ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow);
188 if (prev->type == diRun)
191 assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
192 para = ME_FindItemBack(row, diParagraph);
194 assert(para->type == diParagraph);
195 if (editor->bCaretAtEnd && !pCursor->nOffset &&
196 run == ME_FindItemFwd(row, diRun))
198 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
200 if (tmp->type == diRun)
202 row = ME_FindItemBack(tmp, diStartRow);
203 pSizeRun = run = tmp;
205 assert(run->type == diRun);
206 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, ME_StrLen(run->member.run.strText));
209 if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) {
210 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset);
213 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
214 *x = run->member.run.pt.x + sz.cx;
215 *y = para->member.para.nYPos + row->member.row.nBaseline + pSizeRun->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
217 ME_DestroyContext(&c);
218 ReleaseDC(editor->hWnd, hDC);
222 *height = 10; /* FIXME use global font */
229 ME_MoveCaret(ME_TextEditor *editor)
233 ME_WrapMarkedParagraphs(editor);
234 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
235 CreateCaret(editor->hWnd, NULL, 0, height);
240 void ME_ShowCaret(ME_TextEditor *ed)
246 void ME_HideCaret(ME_TextEditor *ed)
252 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
261 ME_CursorFromCharOfs(editor, nOfs, &c);
262 run = &c.pRun->member.run;
263 if (run->nFlags & MERF_ENDPARA) {
264 if (!ME_FindItemFwd(c.pRun, diParagraph))
268 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
269 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
270 ME_CheckCharOffsets(editor);
272 if (editor->bEmulateVersion10 && nChars)
279 int nIntendedChars = nChars;
280 int nCharsToDelete = nChars;
284 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
287 ME_StrRelPos(run->strText, loc, &nChars);
288 /* nChars is the number of characters that should be deleted from the
289 FOLLOWING runs (these AFTER cursor.pRun)
290 nCharsToDelete is a number of chars to delete from THIS run */
291 nCharsToDelete -= nChars;
292 shift -= nCharsToDelete;
293 TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
294 nCharsToDelete, nIntendedChars, nChars, c.nOffset,
295 debugstr_w(run->strText->szData), run->strText->nLen);
297 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
299 /* undo = reinsert whole run */
300 /* nOfs is a character offset (from the start of the document
301 to the current (deleted) run */
302 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
304 pUndo->di.member.run.nCharOfs = nOfs;
308 /* undo = reinsert partial run */
309 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
311 ME_DestroyString(pUndo->di.member.run.strText);
312 pUndo->di.member.run.nCharOfs = nOfs;
313 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
316 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
317 TRACE("Shift value: %d\n", shift);
318 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
320 /* update cursors (including c) */
321 for (i=-1; i<editor->nCursors; i++) {
322 ME_Cursor *pThisCur = editor->pCursors + i;
323 if (i == -1) pThisCur = &c;
324 if (pThisCur->pRun == cursor.pRun) {
325 if (pThisCur->nOffset > cursor.nOffset) {
326 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
327 pThisCur->nOffset = cursor.nOffset;
329 pThisCur->nOffset -= nCharsToDelete;
330 assert(pThisCur->nOffset >= 0);
331 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
333 if (pThisCur->nOffset == ME_StrVLen(run->strText))
335 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
336 assert(pThisCur->pRun->type == diRun);
337 pThisCur->nOffset = 0;
342 /* c = updated data now */
344 if (c.pRun == cursor.pRun)
345 ME_SkipAndPropagateCharOffset(c.pRun, shift);
347 ME_PropagateCharOffset(c.pRun, shift);
349 if (!ME_StrVLen(cursor.pRun->member.run.strText))
351 TRACE("Removing useless run\n");
352 ME_Remove(cursor.pRun);
353 ME_DestroyDisplayItem(cursor.pRun);
358 ME_CheckCharOffsets(editor);
365 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
368 assert(nCursor>=0 && nCursor<editor->nCursors);
369 ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
372 static ME_DisplayItem *
373 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
374 const WCHAR *str, int len, ME_Style *style,
377 ME_Cursor *p = &editor->pCursors[nCursor];
379 editor->bCaretAtEnd = FALSE;
381 assert(p->pRun->type == diRun);
383 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
387 /* FIXME this is temporary, just to have something to test how bad graphics handler is */
388 void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
390 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
394 if (ME_IsSelection(editor))
395 ME_DeleteSelection(editor);
397 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
399 ME_SendSelChange(editor);
404 ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor)
407 ME_DisplayItem *p, *run;
408 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
410 p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle,
413 while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun)
415 if (run->member.run.nFlags & MERF_CELL)
417 assert(run->member.run.pCell->next);
418 p->member.run.pCell = run->member.run.pCell->next;
422 assert(run->type == diParagraph);
423 assert(run->member.para.bTable);
424 assert(run->member.para.pCells);
425 p->member.run.pCell = run->member.para.pCells;
429 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
430 const WCHAR *str, int len, ME_Style *style)
434 /* FIXME: is this too slow? */
435 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
436 int freeSpace = editor->nTextLimit - ME_GetTextLength(editor);
438 /* text operations set modified state */
439 editor->nModifyStep = 1;
443 /* FIXME really HERE ? */
444 if (ME_IsSelection(editor))
445 ME_DeleteSelection(editor);
447 assert(nCursor>=0 && nCursor<editor->nCursors);
450 len = min(len, freeSpace);
454 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
455 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
457 if (pos-str < len && *pos == '\t') { /* handle tabs */
461 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
463 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
472 if (pos-str < len) { /* handle EOLs */
473 ME_DisplayItem *tp, *end_run;
476 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
477 p = &editor->pCursors[nCursor];
479 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
480 p = &editor->pCursors[nCursor];
482 tmp_style = ME_GetInsertStyle(editor, nCursor);
483 /* ME_SplitParagraph increases style refcount */
484 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
485 p->pRun = ME_FindItemFwd(tp, diRun);
486 end_run = ME_FindItemBack(tp, diRun);
487 ME_ReleaseStyle(end_run->member.run.style);
488 end_run->member.run.style = tmp_style;
490 if(pos-str < len && *pos =='\r')
492 if(pos-str < len && *pos =='\n')
500 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
507 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
509 ME_DisplayItem *pRun = pCursor->pRun;
513 if (!pCursor->nOffset)
516 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
523 if (pRun->member.para.prev_para->type == diTextStart)
525 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
526 /* every paragraph ought to have at least one run */
527 assert(pRun && pRun->type == diRun);
528 assert(pRun->member.run.nFlags & MERF_ENDPARA);
531 assert(pRun->type != diRun && pRun->type != diParagraph);
534 } while (RUN_IS_HIDDEN(&pRun->member.run));
535 pCursor->pRun = pRun;
536 if (pRun->member.run.nFlags & MERF_ENDPARA)
537 pCursor->nOffset = 0;
539 pCursor->nOffset = pRun->member.run.strText->nLen;
542 if (pCursor->nOffset)
543 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
548 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
550 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
552 if (new_ofs < pRun->member.run.strText->nLen)
554 pCursor->nOffset = new_ofs;
559 pRun = ME_FindItemFwd(pRun, diRun);
560 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
563 pCursor->pRun = pRun;
564 pCursor->nOffset = 0;
573 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
575 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
576 int nOffset = cursor->nOffset;
580 /* Backward movement */
583 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
584 nOffset, WB_MOVEWORDLEFT);
587 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
588 if (pOtherRun->type == diRun)
590 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
591 pOtherRun->member.run.strText->nLen - 1,
593 && !(pRun->member.run.nFlags & MERF_ENDPARA)
594 && !(cursor->pRun == pRun && cursor->nOffset == 0)
595 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
599 nOffset = pOtherRun->member.run.strText->nLen;
601 else if (pOtherRun->type == diParagraph)
603 if (cursor->pRun == pRun && cursor->nOffset == 0)
605 /* Paragraph breaks are treated as separate words */
606 if (pOtherRun->member.para.prev_para->type == diTextStart)
608 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
616 /* Forward movement */
617 BOOL last_delim = FALSE;
621 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
622 nOffset, WB_ISDELIMITER))
624 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
625 nOffset, WB_MOVEWORDRIGHT);
626 if (nOffset < pRun->member.run.strText->nLen)
628 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
629 if (pOtherRun->type == diRun)
631 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
632 nOffset - 1, WB_ISDELIMITER);
636 else if (pOtherRun->type == diParagraph)
638 if (cursor->pRun == pRun)
639 pRun = ME_FindItemFwd(pOtherRun, diRun);
645 if (cursor->pRun == pRun)
653 cursor->nOffset = nOffset;
659 ME_SelectWord(ME_TextEditor *editor)
661 if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
662 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
663 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
664 ME_InvalidateSelection(editor);
665 ME_SendSelChange(editor);
669 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
671 ME_Cursor *pCursor = &editor->pCursors[nCursor];
673 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
674 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
677 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
679 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
685 while(p != editor->pBuffer->pLast)
687 if (p->type == diParagraph)
689 int ry = y - p->member.para.nYPos;
692 result->pRun = ME_FindItemFwd(p, diRun);
696 if (ry >= p->member.para.nHeight)
698 p = p->member.para.next_para;
701 p = ME_FindItemFwd(p, diStartRow);
705 if (p->type == diStartRow)
707 int ry = y - p->member.row.nYPos;
710 if (ry >= p->member.row.nHeight)
712 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
713 if (p->type != diStartRow)
717 p = ME_FindItemFwd(p, diRun);
720 if (p->type == diRun)
723 rx = x - p->member.run.pt.x;
726 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
731 if (p->type == diRun)
733 rx = x - p->member.run.pt.x;
734 goto continue_search;
736 if (p->type == diStartRow)
738 p = ME_FindItemFwd(p, diRun);
741 rx = 0; /* FIXME not sure */
744 if (p->type == diParagraph || p->type == diTextEnd)
746 rx = 0; /* FIXME not sure */
754 if (p->member.run.nFlags & MERF_ENDPARA)
757 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
758 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
760 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
769 result->pRun = ME_FindItemBack(p, diRun);
771 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
777 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
782 GetClientRect(editor->hWnd, &rc);
783 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
785 y += ME_GetYScrollPos(editor);
786 ME_FindPixelPos(editor, x, y, &cursor, NULL);
787 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
788 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
792 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
794 ME_Cursor tmp_cursor;
795 int is_selection = 0;
797 editor->nUDArrowX = -1;
799 y += ME_GetYScrollPos(editor);
801 tmp_cursor = editor->pCursors[0];
802 is_selection = ME_IsSelection(editor);
804 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
806 if (GetKeyState(VK_SHIFT)>=0)
808 editor->pCursors[1] = editor->pCursors[0];
813 editor->pCursors[1] = tmp_cursor;
817 ME_InvalidateSelection(editor);
818 HideCaret(editor->hWnd);
819 ME_MoveCaret(editor);
820 ShowCaret(editor->hWnd);
821 ME_ClearTempStyle(editor);
822 ME_SendSelChange(editor);
825 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
827 ME_Cursor tmp_cursor;
829 y += ME_GetYScrollPos(editor);
831 tmp_cursor = editor->pCursors[0];
832 /* FIXME: do something with the return value of ME_FindPixelPos */
833 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
835 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
836 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
839 ME_InvalidateSelection(editor);
840 editor->pCursors[0] = tmp_cursor;
841 HideCaret(editor->hWnd);
842 ME_MoveCaret(editor);
843 ME_InvalidateSelection(editor);
844 ShowCaret(editor->hWnd);
845 ME_SendSelChange(editor);
848 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
849 int x, int *pOffset, int *pbCaretAtEnd)
851 ME_DisplayItem *pNext, *pLastRun;
852 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
853 assert(pNext->type == diRun);
855 *pbCaretAtEnd = FALSE;
857 int run_x = pNext->member.run.pt.x;
858 int width = pNext->member.run.nWidth;
861 if (pOffset) *pOffset = 0;
864 if (x >= run_x && x < run_x+width)
866 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
867 ME_String *s = pNext->member.run.strText;
875 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
876 } while(pNext && pNext->type == diRun);
878 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
880 pNext = ME_FindItemFwd(pNext, diRun);
881 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
882 if (pOffset) *pOffset = 0;
885 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
886 if (pOffset) *pOffset = 0;
891 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
893 ME_DisplayItem *pRun = pCursor->pRun;
896 if (editor->nUDArrowX != -1)
897 x = editor->nUDArrowX;
899 if (editor->bCaretAtEnd)
901 pRun = ME_FindItemBack(pRun, diRun);
903 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
906 x = pRun->member.run.pt.x;
907 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
909 editor->nUDArrowX = x;
916 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
918 ME_DisplayItem *pRun = pCursor->pRun;
919 ME_DisplayItem *pItem;
920 int x = ME_GetXForArrow(editor, pCursor);
922 if (editor->bCaretAtEnd && !pCursor->nOffset)
923 pRun = ME_FindItemBack(pRun, diRun);
928 /* start of this row */
929 pItem = ME_FindItemBack(pRun, diStartRow);
931 /* start of the previous row */
932 pItem = ME_FindItemBack(pItem, diStartRow);
936 /* start of the next row */
937 pItem = ME_FindItemFwd(pRun, diStartRow);
938 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
943 /* row not found - ignore */
946 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
947 assert(pCursor->pRun);
948 assert(pCursor->pRun->type == diRun);
952 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
954 ME_DisplayItem *pRun = pCursor->pRun;
955 ME_DisplayItem *pLast, *p;
956 int x, y, ys, yd, yp, yprev;
957 ME_Cursor tmp_curs = *pCursor;
959 x = ME_GetXForArrow(editor, pCursor);
960 if (!pCursor->nOffset && editor->bCaretAtEnd)
961 pRun = ME_FindItemBack(pRun, diRun);
963 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
964 assert(p->type == diStartRow);
965 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
966 yprev = ys = y = yp + p->member.row.nYPos;
967 yd = y - editor->sizeWindow.cy;
971 p = ME_FindItemBack(p, diStartRowOrParagraph);
974 if (p->type == diParagraph) { /* crossing paragraphs */
975 if (p->member.para.prev_para == NULL)
977 yp = p->member.para.prev_para->member.para.nYPos;
980 y = yp + p->member.row.nYPos;
987 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
988 ME_UpdateSelection(editor, &tmp_curs);
989 if (yprev < editor->sizeWindow.cy)
991 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
996 ME_ScrollUp(editor, ys-yprev);
998 assert(pCursor->pRun);
999 assert(pCursor->pRun->type == diRun);
1002 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1003 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1004 In such a situation, clicking the scrollbar restores its position back to the
1005 normal range (ie. sets it to (doclength-screenheight)). */
1007 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1009 ME_DisplayItem *pRun = pCursor->pRun;
1010 ME_DisplayItem *pLast, *p;
1011 int x, y, ys, yd, yp, yprev;
1012 ME_Cursor tmp_curs = *pCursor;
1014 x = ME_GetXForArrow(editor, pCursor);
1015 if (!pCursor->nOffset && editor->bCaretAtEnd)
1016 pRun = ME_FindItemBack(pRun, diRun);
1018 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1019 assert(p->type == diStartRow);
1020 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1021 yprev = ys = y = yp + p->member.row.nYPos;
1022 yd = y + editor->sizeWindow.cy;
1026 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1029 if (p->type == diParagraph) {
1030 yp = p->member.para.nYPos;
1033 y = yp + p->member.row.nYPos;
1040 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1041 ME_UpdateSelection(editor, &tmp_curs);
1042 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1044 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1049 ME_ScrollUp(editor,ys-yprev);
1051 assert(pCursor->pRun);
1052 assert(pCursor->pRun->type == diRun);
1055 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1057 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1058 /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1059 first character of the next row */
1060 assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1061 ME_WrapMarkedParagraphs(editor);
1063 ME_DisplayItem *pRun;
1064 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1065 pRow = ME_FindItemBack(pRow, diStartRow);
1069 pRun = ME_FindItemFwd(pRow, diRun);
1071 pCursor->pRun = pRun;
1072 pCursor->nOffset = 0;
1075 editor->bCaretAtEnd = FALSE;
1078 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1080 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1082 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1084 pCursor->pRun = pRun;
1085 pCursor->nOffset = 0;
1090 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1092 ME_DisplayItem *pRow;
1094 if (editor->bCaretAtEnd && !pCursor->nOffset)
1097 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1099 if (pRow->type == diStartRow) {
1100 /* FIXME WTF was I thinking about here ? */
1101 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1103 pCursor->pRun = pRun;
1104 pCursor->nOffset = 0;
1105 editor->bCaretAtEnd = 1;
1108 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1109 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1110 pCursor->nOffset = 0;
1111 editor->bCaretAtEnd = FALSE;
1114 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1116 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1118 p = ME_FindItemBack(p, diRun);
1120 assert(p->member.run.nFlags & MERF_ENDPARA);
1122 pCursor->nOffset = 0;
1123 editor->bCaretAtEnd = FALSE;
1126 BOOL ME_IsSelection(ME_TextEditor *editor)
1128 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1131 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1133 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1141 BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
1143 ME_Cursor old_anchor = editor->pCursors[1];
1145 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1147 /* any selection was present ? if so, it's no more, repaint ! */
1148 editor->pCursors[1] = editor->pCursors[0];
1149 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1156 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1158 editor->pCursors[1] = *pTempCursor;
1167 void ME_DeleteSelection(ME_TextEditor *editor)
1170 ME_GetSelection(editor, &from, &to);
1171 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1174 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1180 ME_GetSelection(editor, &from, &to);
1181 ME_CursorFromCharOfs(editor, from, &c);
1183 style = c.pRun->member.run.style;
1184 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1187 style = ME_GetInsertStyle(editor, 0);
1191 void ME_SendSelChange(ME_TextEditor *editor)
1195 ME_ClearTempStyle(editor);
1197 if (!(editor->nEventMask & ENM_SELCHANGE))
1200 sc.nmhdr.hwndFrom = editor->hWnd;
1201 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1202 sc.nmhdr.code = EN_SELCHANGE;
1203 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1204 sc.seltyp = SEL_EMPTY;
1205 if (sc.chrg.cpMin != sc.chrg.cpMax)
1206 sc.seltyp |= SEL_TEXT;
1207 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1208 sc.seltyp |= SEL_MULTICHAR;
1209 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1214 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1217 ME_Cursor *p = &editor->pCursors[nCursor];
1218 ME_Cursor tmp_curs = *p;
1219 BOOL success = FALSE;
1221 ME_CheckCharOffsets(editor);
1222 editor->nUDArrowX = -1;
1225 editor->bCaretAtEnd = 0;
1227 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1229 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1232 editor->bCaretAtEnd = 0;
1234 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1236 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1239 ME_MoveCursorLines(editor, &tmp_curs, -1);
1242 ME_MoveCursorLines(editor, &tmp_curs, +1);
1245 ME_ArrowPageUp(editor, &tmp_curs);
1248 ME_ArrowPageDown(editor, &tmp_curs);
1252 ME_ArrowCtrlHome(editor, &tmp_curs);
1254 ME_ArrowHome(editor, &tmp_curs);
1255 editor->bCaretAtEnd = 0;
1260 ME_ArrowCtrlEnd(editor, &tmp_curs);
1262 ME_ArrowEnd(editor, &tmp_curs);
1267 editor->pCursors[1] = tmp_curs;
1270 ME_InvalidateSelection(editor);
1272 HideCaret(editor->hWnd);
1273 ME_EnsureVisible(editor, tmp_curs.pRun);
1274 ME_ShowCaret(editor);
1275 ME_SendSelChange(editor);