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);
440 /* FIXME really HERE ? */
441 if (ME_IsSelection(editor))
442 ME_DeleteSelection(editor);
444 assert(nCursor>=0 && nCursor<editor->nCursors);
447 len = min(len, freeSpace);
451 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
452 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
454 if (pos-str < len && *pos == '\t') { /* handle tabs */
458 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
460 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
469 if (pos-str < len) { /* handle EOLs */
470 ME_DisplayItem *tp, *end_run;
473 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
474 p = &editor->pCursors[nCursor];
476 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
477 p = &editor->pCursors[nCursor];
479 tmp_style = ME_GetInsertStyle(editor, nCursor);
480 /* ME_SplitParagraph increases style refcount */
481 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
482 p->pRun = ME_FindItemFwd(tp, diRun);
483 end_run = ME_FindItemBack(tp, diRun);
484 ME_ReleaseStyle(end_run->member.run.style);
485 end_run->member.run.style = tmp_style;
487 if(pos-str < len && *pos =='\r')
489 if(pos-str < len && *pos =='\n')
497 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
504 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
506 ME_DisplayItem *pRun = pCursor->pRun;
510 if (!pCursor->nOffset)
513 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
520 if (pRun->member.para.prev_para->type == diTextStart)
522 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
523 /* every paragraph ought to have at least one run */
524 assert(pRun && pRun->type == diRun);
525 assert(pRun->member.run.nFlags & MERF_ENDPARA);
528 assert(pRun->type != diRun && pRun->type != diParagraph);
531 } while (RUN_IS_HIDDEN(&pRun->member.run));
532 pCursor->pRun = pRun;
533 if (pRun->member.run.nFlags & MERF_ENDPARA)
534 pCursor->nOffset = 0;
536 pCursor->nOffset = pRun->member.run.strText->nLen;
539 if (pCursor->nOffset)
540 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
545 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
547 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
549 if (new_ofs < pRun->member.run.strText->nLen)
551 pCursor->nOffset = new_ofs;
556 pRun = ME_FindItemFwd(pRun, diRun);
557 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
560 pCursor->pRun = pRun;
561 pCursor->nOffset = 0;
570 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
572 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
573 int nOffset = cursor->nOffset;
577 /* Backward movement */
580 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
581 nOffset, WB_MOVEWORDLEFT);
584 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
585 if (pOtherRun->type == diRun)
587 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
588 pOtherRun->member.run.strText->nLen - 1,
590 && !(pRun->member.run.nFlags & MERF_ENDPARA)
591 && !(cursor->pRun == pRun && cursor->nOffset == 0)
592 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
596 nOffset = pOtherRun->member.run.strText->nLen;
598 else if (pOtherRun->type == diParagraph)
600 if (cursor->pRun == pRun && cursor->nOffset == 0)
602 /* Paragraph breaks are treated as separate words */
603 if (pOtherRun->member.para.prev_para->type == diTextStart)
605 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
613 /* Forward movement */
614 BOOL last_delim = FALSE;
618 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
619 nOffset, WB_ISDELIMITER))
621 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
622 nOffset, WB_MOVEWORDRIGHT);
623 if (nOffset < pRun->member.run.strText->nLen)
625 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
626 if (pOtherRun->type == diRun)
628 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
629 nOffset - 1, WB_ISDELIMITER);
633 else if (pOtherRun->type == diParagraph)
635 if (cursor->pRun == pRun)
636 pRun = ME_FindItemFwd(pOtherRun, diRun);
642 if (cursor->pRun == pRun)
650 cursor->nOffset = nOffset;
656 ME_SelectWord(ME_TextEditor *editor)
658 if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
659 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
660 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
661 ME_InvalidateSelection(editor);
662 ME_SendSelChange(editor);
666 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
668 ME_Cursor *pCursor = &editor->pCursors[nCursor];
670 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
671 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
674 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
676 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
682 while(p != editor->pBuffer->pLast)
684 if (p->type == diParagraph)
686 int ry = y - p->member.para.nYPos;
689 result->pRun = ME_FindItemFwd(p, diRun);
693 if (ry >= p->member.para.nHeight)
695 p = p->member.para.next_para;
698 p = ME_FindItemFwd(p, diStartRow);
702 if (p->type == diStartRow)
704 int ry = y - p->member.row.nYPos;
707 if (ry >= p->member.row.nHeight)
709 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
710 if (p->type != diStartRow)
714 p = ME_FindItemFwd(p, diRun);
717 if (p->type == diRun)
720 rx = x - p->member.run.pt.x;
723 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
728 if (p->type == diRun)
730 rx = x - p->member.run.pt.x;
731 goto continue_search;
733 if (p->type == diStartRow)
735 p = ME_FindItemFwd(p, diRun);
738 rx = 0; /* FIXME not sure */
741 if (p->type == diParagraph || p->type == diTextEnd)
743 rx = 0; /* FIXME not sure */
751 if (p->member.run.nFlags & MERF_ENDPARA)
754 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
755 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
757 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
766 result->pRun = ME_FindItemBack(p, diRun);
768 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
774 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
779 GetClientRect(editor->hWnd, &rc);
780 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
782 y += ME_GetYScrollPos(editor);
783 ME_FindPixelPos(editor, x, y, &cursor, NULL);
784 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
785 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
789 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
791 ME_Cursor tmp_cursor;
792 int is_selection = 0;
794 editor->nUDArrowX = -1;
796 y += ME_GetYScrollPos(editor);
798 tmp_cursor = editor->pCursors[0];
799 is_selection = ME_IsSelection(editor);
801 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
803 if (GetKeyState(VK_SHIFT)>=0)
805 editor->pCursors[1] = editor->pCursors[0];
810 editor->pCursors[1] = tmp_cursor;
814 ME_InvalidateSelection(editor);
815 HideCaret(editor->hWnd);
816 ME_MoveCaret(editor);
817 ShowCaret(editor->hWnd);
818 ME_ClearTempStyle(editor);
819 ME_SendSelChange(editor);
822 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
824 ME_Cursor tmp_cursor;
826 y += ME_GetYScrollPos(editor);
828 tmp_cursor = editor->pCursors[0];
829 /* FIXME: do something with the return value of ME_FindPixelPos */
830 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
832 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
833 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
836 ME_InvalidateSelection(editor);
837 editor->pCursors[0] = tmp_cursor;
838 HideCaret(editor->hWnd);
839 ME_MoveCaret(editor);
840 ME_InvalidateSelection(editor);
841 ShowCaret(editor->hWnd);
842 ME_SendSelChange(editor);
845 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
846 int x, int *pOffset, int *pbCaretAtEnd)
848 ME_DisplayItem *pNext, *pLastRun;
849 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
850 assert(pNext->type == diRun);
852 *pbCaretAtEnd = FALSE;
854 int run_x = pNext->member.run.pt.x;
855 int width = pNext->member.run.nWidth;
858 if (pOffset) *pOffset = 0;
861 if (x >= run_x && x < run_x+width)
863 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
864 ME_String *s = pNext->member.run.strText;
872 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
873 } while(pNext && pNext->type == diRun);
875 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
877 pNext = ME_FindItemFwd(pNext, diRun);
878 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
879 if (pOffset) *pOffset = 0;
882 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
883 if (pOffset) *pOffset = 0;
888 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
890 ME_DisplayItem *pRun = pCursor->pRun;
893 if (editor->nUDArrowX != -1)
894 x = editor->nUDArrowX;
896 if (editor->bCaretAtEnd)
898 pRun = ME_FindItemBack(pRun, diRun);
900 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
903 x = pRun->member.run.pt.x;
904 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
906 editor->nUDArrowX = x;
913 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
915 ME_DisplayItem *pRun = pCursor->pRun;
916 ME_DisplayItem *pItem;
917 int x = ME_GetXForArrow(editor, pCursor);
919 if (editor->bCaretAtEnd && !pCursor->nOffset)
920 pRun = ME_FindItemBack(pRun, diRun);
925 /* start of this row */
926 pItem = ME_FindItemBack(pRun, diStartRow);
928 /* start of the previous row */
929 pItem = ME_FindItemBack(pItem, diStartRow);
933 /* start of the next row */
934 pItem = ME_FindItemFwd(pRun, diStartRow);
935 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
940 /* row not found - ignore */
943 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
944 assert(pCursor->pRun);
945 assert(pCursor->pRun->type == diRun);
949 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
951 ME_DisplayItem *pRun = pCursor->pRun;
952 ME_DisplayItem *pLast, *p;
953 int x, y, ys, yd, yp, yprev;
954 ME_Cursor tmp_curs = *pCursor;
956 x = ME_GetXForArrow(editor, pCursor);
957 if (!pCursor->nOffset && editor->bCaretAtEnd)
958 pRun = ME_FindItemBack(pRun, diRun);
960 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
961 assert(p->type == diStartRow);
962 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
963 yprev = ys = y = yp + p->member.row.nYPos;
964 yd = y - editor->sizeWindow.cy;
968 p = ME_FindItemBack(p, diStartRowOrParagraph);
971 if (p->type == diParagraph) { /* crossing paragraphs */
972 if (p->member.para.prev_para == NULL)
974 yp = p->member.para.prev_para->member.para.nYPos;
977 y = yp + p->member.row.nYPos;
984 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
985 ME_UpdateSelection(editor, &tmp_curs);
986 if (yprev < editor->sizeWindow.cy)
988 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
993 ME_ScrollUp(editor, ys-yprev);
995 assert(pCursor->pRun);
996 assert(pCursor->pRun->type == diRun);
999 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1000 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1001 In such a situation, clicking the scrollbar restores its position back to the
1002 normal range (ie. sets it to (doclength-screenheight)). */
1004 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1006 ME_DisplayItem *pRun = pCursor->pRun;
1007 ME_DisplayItem *pLast, *p;
1008 int x, y, ys, yd, yp, yprev;
1009 ME_Cursor tmp_curs = *pCursor;
1011 x = ME_GetXForArrow(editor, pCursor);
1012 if (!pCursor->nOffset && editor->bCaretAtEnd)
1013 pRun = ME_FindItemBack(pRun, diRun);
1015 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1016 assert(p->type == diStartRow);
1017 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1018 yprev = ys = y = yp + p->member.row.nYPos;
1019 yd = y + editor->sizeWindow.cy;
1023 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1026 if (p->type == diParagraph) {
1027 yp = p->member.para.nYPos;
1030 y = yp + p->member.row.nYPos;
1037 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1038 ME_UpdateSelection(editor, &tmp_curs);
1039 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1041 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1046 ME_ScrollUp(editor,ys-yprev);
1048 assert(pCursor->pRun);
1049 assert(pCursor->pRun->type == diRun);
1052 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1054 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1055 /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1056 first character of the next row */
1057 assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1058 ME_WrapMarkedParagraphs(editor);
1060 ME_DisplayItem *pRun;
1061 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1062 pRow = ME_FindItemBack(pRow, diStartRow);
1066 pRun = ME_FindItemFwd(pRow, diRun);
1068 pCursor->pRun = pRun;
1069 pCursor->nOffset = 0;
1072 editor->bCaretAtEnd = FALSE;
1075 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1077 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1079 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1081 pCursor->pRun = pRun;
1082 pCursor->nOffset = 0;
1087 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1089 ME_DisplayItem *pRow;
1091 if (editor->bCaretAtEnd && !pCursor->nOffset)
1094 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1096 if (pRow->type == diStartRow) {
1097 /* FIXME WTF was I thinking about here ? */
1098 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1100 pCursor->pRun = pRun;
1101 pCursor->nOffset = 0;
1102 editor->bCaretAtEnd = 1;
1105 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1106 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1107 pCursor->nOffset = 0;
1108 editor->bCaretAtEnd = FALSE;
1111 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1113 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1115 p = ME_FindItemBack(p, diRun);
1117 assert(p->member.run.nFlags & MERF_ENDPARA);
1119 pCursor->nOffset = 0;
1120 editor->bCaretAtEnd = FALSE;
1123 BOOL ME_IsSelection(ME_TextEditor *editor)
1125 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1128 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1130 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1138 BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
1140 ME_Cursor old_anchor = editor->pCursors[1];
1142 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1144 /* any selection was present ? if so, it's no more, repaint ! */
1145 editor->pCursors[1] = editor->pCursors[0];
1146 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1153 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1155 editor->pCursors[1] = *pTempCursor;
1164 void ME_DeleteSelection(ME_TextEditor *editor)
1167 ME_GetSelection(editor, &from, &to);
1168 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1171 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1177 ME_GetSelection(editor, &from, &to);
1178 ME_CursorFromCharOfs(editor, from, &c);
1180 style = c.pRun->member.run.style;
1181 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1184 style = ME_GetInsertStyle(editor, 0);
1188 void ME_SendSelChange(ME_TextEditor *editor)
1192 ME_ClearTempStyle(editor);
1194 if (!(editor->nEventMask & ENM_SELCHANGE))
1197 sc.nmhdr.hwndFrom = editor->hWnd;
1198 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1199 sc.nmhdr.code = EN_SELCHANGE;
1200 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1201 sc.seltyp = SEL_EMPTY;
1202 if (sc.chrg.cpMin != sc.chrg.cpMax)
1203 sc.seltyp |= SEL_TEXT;
1204 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1205 sc.seltyp |= SEL_MULTICHAR;
1206 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1211 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1214 ME_Cursor *p = &editor->pCursors[nCursor];
1215 ME_Cursor tmp_curs = *p;
1216 BOOL success = FALSE;
1218 ME_CheckCharOffsets(editor);
1219 editor->nUDArrowX = -1;
1222 editor->bCaretAtEnd = 0;
1224 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1226 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1229 editor->bCaretAtEnd = 0;
1231 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1233 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1236 ME_MoveCursorLines(editor, &tmp_curs, -1);
1239 ME_MoveCursorLines(editor, &tmp_curs, +1);
1242 ME_ArrowPageUp(editor, &tmp_curs);
1245 ME_ArrowPageDown(editor, &tmp_curs);
1249 ME_ArrowCtrlHome(editor, &tmp_curs);
1251 ME_ArrowHome(editor, &tmp_curs);
1252 editor->bCaretAtEnd = 0;
1257 ME_ArrowCtrlEnd(editor, &tmp_curs);
1259 ME_ArrowEnd(editor, &tmp_curs);
1264 editor->pCursors[1] = tmp_curs;
1267 ME_InvalidateSelection(editor);
1269 HideCaret(editor->hWnd);
1270 ME_EnsureVisible(editor, tmp_curs.pRun);
1271 ME_ShowCaret(editor);
1272 ME_SendSelChange(editor);