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, const 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 ((GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_MULTILINE) && (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 if (ME_WrapMarkedParagraphs(editor))
234 ME_UpdateScrollBar(editor);
235 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
236 if(editor->bHaveFocus)
238 CreateCaret(editor->hWnd, NULL, 0, height);
244 void ME_ShowCaret(ME_TextEditor *ed)
251 void ME_HideCaret(ME_TextEditor *ed)
260 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
269 ME_CursorFromCharOfs(editor, nOfs, &c);
270 run = &c.pRun->member.run;
271 if (run->nFlags & MERF_ENDPARA) {
272 if (!ME_FindItemFwd(c.pRun, diParagraph))
276 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
277 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
278 ME_CheckCharOffsets(editor);
280 if (editor->bEmulateVersion10 && nChars)
287 int nIntendedChars = nChars;
288 int nCharsToDelete = nChars;
292 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
295 ME_StrRelPos(run->strText, loc, &nChars);
296 /* nChars is the number of characters that should be deleted from the
297 FOLLOWING runs (these AFTER cursor.pRun)
298 nCharsToDelete is a number of chars to delete from THIS run */
299 nCharsToDelete -= nChars;
300 shift -= nCharsToDelete;
301 TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
302 nCharsToDelete, nIntendedChars, nChars, c.nOffset,
303 debugstr_w(run->strText->szData), run->strText->nLen);
305 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
307 /* undo = reinsert whole run */
308 /* nOfs is a character offset (from the start of the document
309 to the current (deleted) run */
310 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
312 pUndo->di.member.run.nCharOfs = nOfs;
316 /* undo = reinsert partial run */
317 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
319 ME_DestroyString(pUndo->di.member.run.strText);
320 pUndo->di.member.run.nCharOfs = nOfs;
321 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
324 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
325 TRACE("Shift value: %d\n", shift);
326 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
328 /* update cursors (including c) */
329 for (i=-1; i<editor->nCursors; i++) {
330 ME_Cursor *pThisCur = editor->pCursors + i;
331 if (i == -1) pThisCur = &c;
332 if (pThisCur->pRun == cursor.pRun) {
333 if (pThisCur->nOffset > cursor.nOffset) {
334 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
335 pThisCur->nOffset = cursor.nOffset;
337 pThisCur->nOffset -= nCharsToDelete;
338 assert(pThisCur->nOffset >= 0);
339 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
341 if (pThisCur->nOffset == ME_StrVLen(run->strText))
343 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
344 assert(pThisCur->pRun->type == diRun);
345 pThisCur->nOffset = 0;
350 /* c = updated data now */
352 if (c.pRun == cursor.pRun)
353 ME_SkipAndPropagateCharOffset(c.pRun, shift);
355 ME_PropagateCharOffset(c.pRun, shift);
357 if (!ME_StrVLen(cursor.pRun->member.run.strText))
359 TRACE("Removing useless run\n");
360 ME_Remove(cursor.pRun);
361 ME_DestroyDisplayItem(cursor.pRun);
366 ME_CheckCharOffsets(editor);
373 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
376 assert(nCursor>=0 && nCursor<editor->nCursors);
377 /* text operations set modified state */
378 editor->nModifyStep = 1;
379 ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
382 static ME_DisplayItem *
383 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
384 const WCHAR *str, int len, ME_Style *style,
387 ME_Cursor *p = &editor->pCursors[nCursor];
389 editor->bCaretAtEnd = FALSE;
391 assert(p->pRun->type == diRun);
393 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
397 /* FIXME this is temporary, just to have something to test how bad graphics handler is */
398 void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
400 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
404 if (ME_IsSelection(editor))
405 ME_DeleteSelection(editor);
407 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
409 ME_SendSelChange(editor);
414 ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor)
417 ME_DisplayItem *p, *run;
418 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
420 p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle,
423 while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun)
425 if (run->member.run.nFlags & MERF_CELL)
427 assert(run->member.run.pCell->next);
428 p->member.run.pCell = run->member.run.pCell->next;
432 assert(run->type == diParagraph);
433 assert(run->member.para.bTable);
434 assert(run->member.para.pCells);
435 p->member.run.pCell = run->member.para.pCells;
439 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
440 const WCHAR *str, int len, ME_Style *style)
446 /* FIXME really HERE ? */
447 if (ME_IsSelection(editor))
448 ME_DeleteSelection(editor);
450 /* FIXME: is this too slow? */
451 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
452 freeSpace = editor->nTextLimit - ME_GetTextLength(editor);
454 /* text operations set modified state */
455 editor->nModifyStep = 1;
459 assert(nCursor>=0 && nCursor<editor->nCursors);
462 len = min(len, freeSpace);
466 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
467 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
469 if (pos-str < len && *pos == '\t') { /* handle tabs */
473 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
475 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
484 if (pos-str < len) { /* handle EOLs */
485 ME_DisplayItem *tp, *end_run;
488 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
489 p = &editor->pCursors[nCursor];
491 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
492 p = &editor->pCursors[nCursor];
494 tmp_style = ME_GetInsertStyle(editor, nCursor);
495 /* ME_SplitParagraph increases style refcount */
496 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
497 p->pRun = ME_FindItemFwd(tp, diRun);
498 end_run = ME_FindItemBack(tp, diRun);
499 ME_ReleaseStyle(end_run->member.run.style);
500 end_run->member.run.style = tmp_style;
502 if(pos-str < len && *pos =='\r')
504 if(pos-str < len && *pos =='\n')
512 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
519 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
521 ME_DisplayItem *pRun = pCursor->pRun;
525 if (!pCursor->nOffset)
528 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
535 if (pRun->member.para.prev_para->type == diTextStart)
537 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
538 /* every paragraph ought to have at least one run */
539 assert(pRun && pRun->type == diRun);
540 assert(pRun->member.run.nFlags & MERF_ENDPARA);
543 assert(pRun->type != diRun && pRun->type != diParagraph);
546 } while (RUN_IS_HIDDEN(&pRun->member.run));
547 pCursor->pRun = pRun;
548 if (pRun->member.run.nFlags & MERF_ENDPARA)
549 pCursor->nOffset = 0;
551 pCursor->nOffset = pRun->member.run.strText->nLen;
554 if (pCursor->nOffset)
555 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
560 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
562 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
564 if (new_ofs < pRun->member.run.strText->nLen)
566 pCursor->nOffset = new_ofs;
571 pRun = ME_FindItemFwd(pRun, diRun);
572 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
575 pCursor->pRun = pRun;
576 pCursor->nOffset = 0;
585 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
587 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
588 int nOffset = cursor->nOffset;
592 /* Backward movement */
595 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
596 nOffset, WB_MOVEWORDLEFT);
599 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
600 if (pOtherRun->type == diRun)
602 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
603 pOtherRun->member.run.strText->nLen - 1,
605 && !(pRun->member.run.nFlags & MERF_ENDPARA)
606 && !(cursor->pRun == pRun && cursor->nOffset == 0)
607 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
611 nOffset = pOtherRun->member.run.strText->nLen;
613 else if (pOtherRun->type == diParagraph)
615 if (cursor->pRun == pRun && cursor->nOffset == 0)
617 /* Paragraph breaks are treated as separate words */
618 if (pOtherRun->member.para.prev_para->type == diTextStart)
620 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
628 /* Forward movement */
629 BOOL last_delim = FALSE;
633 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
634 nOffset, WB_ISDELIMITER))
636 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
637 nOffset, WB_MOVEWORDRIGHT);
638 if (nOffset < pRun->member.run.strText->nLen)
640 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
641 if (pOtherRun->type == diRun)
643 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
644 nOffset - 1, WB_ISDELIMITER);
648 else if (pOtherRun->type == diParagraph)
650 if (cursor->pRun == pRun)
651 pRun = ME_FindItemFwd(pOtherRun, diRun);
657 if (cursor->pRun == pRun)
665 cursor->nOffset = nOffset;
671 ME_SelectWord(ME_TextEditor *editor)
673 if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
674 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
675 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
676 ME_InvalidateSelection(editor);
677 ME_SendSelChange(editor);
681 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
683 ME_Cursor *pCursor = &editor->pCursors[nCursor];
685 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
686 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
689 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
691 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
697 while(p != editor->pBuffer->pLast)
699 if (p->type == diParagraph)
701 int ry = y - p->member.para.nYPos;
704 result->pRun = ME_FindItemFwd(p, diRun);
708 if (ry >= p->member.para.nHeight)
710 p = p->member.para.next_para;
713 p = ME_FindItemFwd(p, diStartRow);
717 if (p->type == diStartRow)
719 int ry = y - p->member.row.nYPos;
722 if (ry >= p->member.row.nHeight)
724 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
725 if (p->type != diStartRow)
729 p = ME_FindItemFwd(p, diRun);
732 if (p->type == diRun)
735 rx = x - p->member.run.pt.x;
738 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
743 if (p->type == diRun)
745 rx = x - p->member.run.pt.x;
746 goto continue_search;
748 if (p->type == diStartRow)
750 p = ME_FindItemFwd(p, diRun);
753 rx = 0; /* FIXME not sure */
756 if (p->type == diParagraph || p->type == diTextEnd)
758 rx = 0; /* FIXME not sure */
766 if (p->member.run.nFlags & MERF_ENDPARA)
769 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
770 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
772 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
781 result->pRun = ME_FindItemBack(p, diRun);
783 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
789 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
794 GetClientRect(editor->hWnd, &rc);
795 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
797 y += ME_GetYScrollPos(editor);
798 ME_FindPixelPos(editor, x, y, &cursor, NULL);
799 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
800 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
804 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
806 ME_Cursor tmp_cursor;
807 int is_selection = 0;
809 editor->nUDArrowX = -1;
811 y += ME_GetYScrollPos(editor);
813 tmp_cursor = editor->pCursors[0];
814 is_selection = ME_IsSelection(editor);
816 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
818 if (GetKeyState(VK_SHIFT)>=0)
820 editor->pCursors[1] = editor->pCursors[0];
825 editor->pCursors[1] = tmp_cursor;
829 ME_InvalidateSelection(editor);
830 HideCaret(editor->hWnd);
831 ME_MoveCaret(editor);
832 ShowCaret(editor->hWnd);
833 ME_ClearTempStyle(editor);
834 ME_SendSelChange(editor);
837 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
839 ME_Cursor tmp_cursor;
841 y += ME_GetYScrollPos(editor);
843 tmp_cursor = editor->pCursors[0];
844 /* FIXME: do something with the return value of ME_FindPixelPos */
845 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
847 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
848 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
851 ME_InvalidateSelection(editor);
852 editor->pCursors[0] = tmp_cursor;
853 HideCaret(editor->hWnd);
854 ME_MoveCaret(editor);
855 ME_InvalidateSelection(editor);
856 ShowCaret(editor->hWnd);
857 ME_SendSelChange(editor);
860 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
861 int x, int *pOffset, int *pbCaretAtEnd)
863 ME_DisplayItem *pNext, *pLastRun;
864 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
865 assert(pNext->type == diRun);
867 *pbCaretAtEnd = FALSE;
869 int run_x = pNext->member.run.pt.x;
870 int width = pNext->member.run.nWidth;
873 if (pOffset) *pOffset = 0;
876 if (x >= run_x && x < run_x+width)
878 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
879 ME_String *s = pNext->member.run.strText;
887 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
888 } while(pNext && pNext->type == diRun);
890 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
892 pNext = ME_FindItemFwd(pNext, diRun);
893 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
894 if (pOffset) *pOffset = 0;
897 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
898 if (pOffset) *pOffset = 0;
903 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
905 ME_DisplayItem *pRun = pCursor->pRun;
908 if (editor->nUDArrowX != -1)
909 x = editor->nUDArrowX;
911 if (editor->bCaretAtEnd)
913 pRun = ME_FindItemBack(pRun, diRun);
915 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
918 x = pRun->member.run.pt.x;
919 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
921 editor->nUDArrowX = x;
928 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
930 ME_DisplayItem *pRun = pCursor->pRun;
931 ME_DisplayItem *pItem;
932 int x = ME_GetXForArrow(editor, pCursor);
934 if (editor->bCaretAtEnd && !pCursor->nOffset)
935 pRun = ME_FindItemBack(pRun, diRun);
940 /* start of this row */
941 pItem = ME_FindItemBack(pRun, diStartRow);
943 /* start of the previous row */
944 pItem = ME_FindItemBack(pItem, diStartRow);
948 /* start of the next row */
949 pItem = ME_FindItemFwd(pRun, diStartRow);
950 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
955 /* row not found - ignore */
958 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
959 assert(pCursor->pRun);
960 assert(pCursor->pRun->type == diRun);
964 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
966 ME_DisplayItem *pRun = pCursor->pRun;
967 ME_DisplayItem *pLast, *p;
968 int x, y, ys, yd, yp, yprev;
969 ME_Cursor tmp_curs = *pCursor;
971 x = ME_GetXForArrow(editor, pCursor);
972 if (!pCursor->nOffset && editor->bCaretAtEnd)
973 pRun = ME_FindItemBack(pRun, diRun);
975 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
976 assert(p->type == diStartRow);
977 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
978 yprev = ys = y = yp + p->member.row.nYPos;
979 yd = y - editor->sizeWindow.cy;
983 p = ME_FindItemBack(p, diStartRowOrParagraph);
986 if (p->type == diParagraph) { /* crossing paragraphs */
987 if (p->member.para.prev_para == NULL)
989 yp = p->member.para.prev_para->member.para.nYPos;
992 y = yp + p->member.row.nYPos;
999 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1000 ME_UpdateSelection(editor, &tmp_curs);
1001 if (yprev < editor->sizeWindow.cy)
1003 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1008 ME_ScrollUp(editor, ys-yprev);
1010 assert(pCursor->pRun);
1011 assert(pCursor->pRun->type == diRun);
1014 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1015 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1016 In such a situation, clicking the scrollbar restores its position back to the
1017 normal range (ie. sets it to (doclength-screenheight)). */
1019 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1021 ME_DisplayItem *pRun = pCursor->pRun;
1022 ME_DisplayItem *pLast, *p;
1023 int x, y, ys, yd, yp, yprev;
1024 ME_Cursor tmp_curs = *pCursor;
1026 x = ME_GetXForArrow(editor, pCursor);
1027 if (!pCursor->nOffset && editor->bCaretAtEnd)
1028 pRun = ME_FindItemBack(pRun, diRun);
1030 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1031 assert(p->type == diStartRow);
1032 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1033 yprev = ys = y = yp + p->member.row.nYPos;
1034 yd = y + editor->sizeWindow.cy;
1038 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1041 if (p->type == diParagraph) {
1042 yp = p->member.para.nYPos;
1045 y = yp + p->member.row.nYPos;
1052 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1053 ME_UpdateSelection(editor, &tmp_curs);
1054 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1056 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1061 ME_ScrollUp(editor,ys-yprev);
1063 assert(pCursor->pRun);
1064 assert(pCursor->pRun->type == diRun);
1067 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1069 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1070 /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1071 first character of the next row */
1072 assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1073 ME_WrapMarkedParagraphs(editor);
1075 ME_DisplayItem *pRun;
1076 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1077 pRow = ME_FindItemBack(pRow, diStartRow);
1081 pRun = ME_FindItemFwd(pRow, diRun);
1083 pCursor->pRun = pRun;
1084 pCursor->nOffset = 0;
1087 editor->bCaretAtEnd = FALSE;
1090 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1092 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1094 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1096 pCursor->pRun = pRun;
1097 pCursor->nOffset = 0;
1102 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1104 ME_DisplayItem *pRow;
1106 if (editor->bCaretAtEnd && !pCursor->nOffset)
1109 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1111 if (pRow->type == diStartRow) {
1112 /* FIXME WTF was I thinking about here ? */
1113 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1115 pCursor->pRun = pRun;
1116 pCursor->nOffset = 0;
1117 editor->bCaretAtEnd = 1;
1120 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1121 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1122 pCursor->nOffset = 0;
1123 editor->bCaretAtEnd = FALSE;
1126 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1128 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1130 p = ME_FindItemBack(p, diRun);
1132 assert(p->member.run.nFlags & MERF_ENDPARA);
1134 pCursor->nOffset = 0;
1135 editor->bCaretAtEnd = FALSE;
1138 BOOL ME_IsSelection(ME_TextEditor *editor)
1140 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1143 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1145 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1153 BOOL ME_UpdateSelection(ME_TextEditor *editor, const ME_Cursor *pTempCursor)
1155 ME_Cursor old_anchor = editor->pCursors[1];
1157 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1159 /* any selection was present ? if so, it's no more, repaint ! */
1160 editor->pCursors[1] = editor->pCursors[0];
1161 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1168 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1170 editor->pCursors[1] = *pTempCursor;
1179 void ME_DeleteSelection(ME_TextEditor *editor)
1182 ME_GetSelection(editor, &from, &to);
1183 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1186 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1192 ME_GetSelection(editor, &from, &to);
1193 ME_CursorFromCharOfs(editor, from, &c);
1195 style = c.pRun->member.run.style;
1196 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1199 style = ME_GetInsertStyle(editor, 0);
1203 void ME_SendSelChange(ME_TextEditor *editor)
1207 ME_ClearTempStyle(editor);
1209 if (!(editor->nEventMask & ENM_SELCHANGE))
1212 sc.nmhdr.hwndFrom = editor->hWnd;
1213 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1214 sc.nmhdr.code = EN_SELCHANGE;
1215 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1216 sc.seltyp = SEL_EMPTY;
1217 if (sc.chrg.cpMin != sc.chrg.cpMax)
1218 sc.seltyp |= SEL_TEXT;
1219 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1220 sc.seltyp |= SEL_MULTICHAR;
1221 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1226 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1229 ME_Cursor *p = &editor->pCursors[nCursor];
1230 ME_Cursor tmp_curs = *p;
1231 BOOL success = FALSE;
1233 ME_CheckCharOffsets(editor);
1234 editor->nUDArrowX = -1;
1237 editor->bCaretAtEnd = 0;
1239 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1241 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1244 editor->bCaretAtEnd = 0;
1246 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1248 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1251 ME_MoveCursorLines(editor, &tmp_curs, -1);
1254 ME_MoveCursorLines(editor, &tmp_curs, +1);
1257 ME_ArrowPageUp(editor, &tmp_curs);
1260 ME_ArrowPageDown(editor, &tmp_curs);
1264 ME_ArrowCtrlHome(editor, &tmp_curs);
1266 ME_ArrowHome(editor, &tmp_curs);
1267 editor->bCaretAtEnd = 0;
1272 ME_ArrowCtrlEnd(editor, &tmp_curs);
1274 ME_ArrowEnd(editor, &tmp_curs);
1279 editor->pCursors[1] = tmp_curs;
1282 ME_InvalidateSelection(editor);
1284 HideCaret(editor->hWnd);
1285 ME_EnsureVisible(editor, tmp_curs.pRun);
1286 ME_ShowCaret(editor);
1287 ME_SendSelChange(editor);