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 if(editor->bHaveFocus)
237 CreateCaret(editor->hWnd, NULL, 0, height);
243 void ME_ShowCaret(ME_TextEditor *ed)
250 void ME_HideCaret(ME_TextEditor *ed)
259 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
268 ME_CursorFromCharOfs(editor, nOfs, &c);
269 run = &c.pRun->member.run;
270 if (run->nFlags & MERF_ENDPARA) {
271 if (!ME_FindItemFwd(c.pRun, diParagraph))
275 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
276 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
277 ME_CheckCharOffsets(editor);
279 if (editor->bEmulateVersion10 && nChars)
286 int nIntendedChars = nChars;
287 int nCharsToDelete = nChars;
291 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
294 ME_StrRelPos(run->strText, loc, &nChars);
295 /* nChars is the number of characters that should be deleted from the
296 FOLLOWING runs (these AFTER cursor.pRun)
297 nCharsToDelete is a number of chars to delete from THIS run */
298 nCharsToDelete -= nChars;
299 shift -= nCharsToDelete;
300 TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
301 nCharsToDelete, nIntendedChars, nChars, c.nOffset,
302 debugstr_w(run->strText->szData), run->strText->nLen);
304 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
306 /* undo = reinsert whole run */
307 /* nOfs is a character offset (from the start of the document
308 to the current (deleted) run */
309 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
311 pUndo->di.member.run.nCharOfs = nOfs;
315 /* undo = reinsert partial run */
316 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
318 ME_DestroyString(pUndo->di.member.run.strText);
319 pUndo->di.member.run.nCharOfs = nOfs;
320 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
323 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
324 TRACE("Shift value: %d\n", shift);
325 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
327 /* update cursors (including c) */
328 for (i=-1; i<editor->nCursors; i++) {
329 ME_Cursor *pThisCur = editor->pCursors + i;
330 if (i == -1) pThisCur = &c;
331 if (pThisCur->pRun == cursor.pRun) {
332 if (pThisCur->nOffset > cursor.nOffset) {
333 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
334 pThisCur->nOffset = cursor.nOffset;
336 pThisCur->nOffset -= nCharsToDelete;
337 assert(pThisCur->nOffset >= 0);
338 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
340 if (pThisCur->nOffset == ME_StrVLen(run->strText))
342 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
343 assert(pThisCur->pRun->type == diRun);
344 pThisCur->nOffset = 0;
349 /* c = updated data now */
351 if (c.pRun == cursor.pRun)
352 ME_SkipAndPropagateCharOffset(c.pRun, shift);
354 ME_PropagateCharOffset(c.pRun, shift);
356 if (!ME_StrVLen(cursor.pRun->member.run.strText))
358 TRACE("Removing useless run\n");
359 ME_Remove(cursor.pRun);
360 ME_DestroyDisplayItem(cursor.pRun);
365 ME_CheckCharOffsets(editor);
372 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
375 assert(nCursor>=0 && nCursor<editor->nCursors);
376 /* text operations set modified state */
377 editor->nModifyStep = 1;
378 ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
381 static ME_DisplayItem *
382 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
383 const WCHAR *str, int len, ME_Style *style,
386 ME_Cursor *p = &editor->pCursors[nCursor];
388 editor->bCaretAtEnd = FALSE;
390 assert(p->pRun->type == diRun);
392 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
396 /* FIXME this is temporary, just to have something to test how bad graphics handler is */
397 void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
399 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
403 if (ME_IsSelection(editor))
404 ME_DeleteSelection(editor);
406 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
408 ME_SendSelChange(editor);
413 ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor)
416 ME_DisplayItem *p, *run;
417 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
419 p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle,
422 while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun)
424 if (run->member.run.nFlags & MERF_CELL)
426 assert(run->member.run.pCell->next);
427 p->member.run.pCell = run->member.run.pCell->next;
431 assert(run->type == diParagraph);
432 assert(run->member.para.bTable);
433 assert(run->member.para.pCells);
434 p->member.run.pCell = run->member.para.pCells;
438 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
439 const WCHAR *str, int len, ME_Style *style)
445 /* FIXME really HERE ? */
446 if (ME_IsSelection(editor))
447 ME_DeleteSelection(editor);
449 /* FIXME: is this too slow? */
450 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
451 freeSpace = editor->nTextLimit - ME_GetTextLength(editor);
453 /* text operations set modified state */
454 editor->nModifyStep = 1;
458 assert(nCursor>=0 && nCursor<editor->nCursors);
461 len = min(len, freeSpace);
465 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
466 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
468 if (pos-str < len && *pos == '\t') { /* handle tabs */
472 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
474 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
483 if (pos-str < len) { /* handle EOLs */
484 ME_DisplayItem *tp, *end_run;
487 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
488 p = &editor->pCursors[nCursor];
490 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
491 p = &editor->pCursors[nCursor];
493 tmp_style = ME_GetInsertStyle(editor, nCursor);
494 /* ME_SplitParagraph increases style refcount */
495 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
496 p->pRun = ME_FindItemFwd(tp, diRun);
497 end_run = ME_FindItemBack(tp, diRun);
498 ME_ReleaseStyle(end_run->member.run.style);
499 end_run->member.run.style = tmp_style;
501 if(pos-str < len && *pos =='\r')
503 if(pos-str < len && *pos =='\n')
511 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
518 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
520 ME_DisplayItem *pRun = pCursor->pRun;
524 if (!pCursor->nOffset)
527 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
534 if (pRun->member.para.prev_para->type == diTextStart)
536 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
537 /* every paragraph ought to have at least one run */
538 assert(pRun && pRun->type == diRun);
539 assert(pRun->member.run.nFlags & MERF_ENDPARA);
542 assert(pRun->type != diRun && pRun->type != diParagraph);
545 } while (RUN_IS_HIDDEN(&pRun->member.run));
546 pCursor->pRun = pRun;
547 if (pRun->member.run.nFlags & MERF_ENDPARA)
548 pCursor->nOffset = 0;
550 pCursor->nOffset = pRun->member.run.strText->nLen;
553 if (pCursor->nOffset)
554 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
559 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
561 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
563 if (new_ofs < pRun->member.run.strText->nLen)
565 pCursor->nOffset = new_ofs;
570 pRun = ME_FindItemFwd(pRun, diRun);
571 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
574 pCursor->pRun = pRun;
575 pCursor->nOffset = 0;
584 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
586 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
587 int nOffset = cursor->nOffset;
591 /* Backward movement */
594 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
595 nOffset, WB_MOVEWORDLEFT);
598 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
599 if (pOtherRun->type == diRun)
601 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
602 pOtherRun->member.run.strText->nLen - 1,
604 && !(pRun->member.run.nFlags & MERF_ENDPARA)
605 && !(cursor->pRun == pRun && cursor->nOffset == 0)
606 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
610 nOffset = pOtherRun->member.run.strText->nLen;
612 else if (pOtherRun->type == diParagraph)
614 if (cursor->pRun == pRun && cursor->nOffset == 0)
616 /* Paragraph breaks are treated as separate words */
617 if (pOtherRun->member.para.prev_para->type == diTextStart)
619 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
627 /* Forward movement */
628 BOOL last_delim = FALSE;
632 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
633 nOffset, WB_ISDELIMITER))
635 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
636 nOffset, WB_MOVEWORDRIGHT);
637 if (nOffset < pRun->member.run.strText->nLen)
639 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
640 if (pOtherRun->type == diRun)
642 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
643 nOffset - 1, WB_ISDELIMITER);
647 else if (pOtherRun->type == diParagraph)
649 if (cursor->pRun == pRun)
650 pRun = ME_FindItemFwd(pOtherRun, diRun);
656 if (cursor->pRun == pRun)
664 cursor->nOffset = nOffset;
670 ME_SelectWord(ME_TextEditor *editor)
672 if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
673 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
674 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
675 ME_InvalidateSelection(editor);
676 ME_SendSelChange(editor);
680 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
682 ME_Cursor *pCursor = &editor->pCursors[nCursor];
684 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
685 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
688 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
690 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
696 while(p != editor->pBuffer->pLast)
698 if (p->type == diParagraph)
700 int ry = y - p->member.para.nYPos;
703 result->pRun = ME_FindItemFwd(p, diRun);
707 if (ry >= p->member.para.nHeight)
709 p = p->member.para.next_para;
712 p = ME_FindItemFwd(p, diStartRow);
716 if (p->type == diStartRow)
718 int ry = y - p->member.row.nYPos;
721 if (ry >= p->member.row.nHeight)
723 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
724 if (p->type != diStartRow)
728 p = ME_FindItemFwd(p, diRun);
731 if (p->type == diRun)
734 rx = x - p->member.run.pt.x;
737 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
742 if (p->type == diRun)
744 rx = x - p->member.run.pt.x;
745 goto continue_search;
747 if (p->type == diStartRow)
749 p = ME_FindItemFwd(p, diRun);
752 rx = 0; /* FIXME not sure */
755 if (p->type == diParagraph || p->type == diTextEnd)
757 rx = 0; /* FIXME not sure */
765 if (p->member.run.nFlags & MERF_ENDPARA)
768 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
769 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
771 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
780 result->pRun = ME_FindItemBack(p, diRun);
782 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
788 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
793 GetClientRect(editor->hWnd, &rc);
794 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
796 y += ME_GetYScrollPos(editor);
797 ME_FindPixelPos(editor, x, y, &cursor, NULL);
798 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
799 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
803 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
805 ME_Cursor tmp_cursor;
806 int is_selection = 0;
808 editor->nUDArrowX = -1;
810 y += ME_GetYScrollPos(editor);
812 tmp_cursor = editor->pCursors[0];
813 is_selection = ME_IsSelection(editor);
815 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
817 if (GetKeyState(VK_SHIFT)>=0)
819 editor->pCursors[1] = editor->pCursors[0];
824 editor->pCursors[1] = tmp_cursor;
828 ME_InvalidateSelection(editor);
829 HideCaret(editor->hWnd);
830 ME_MoveCaret(editor);
831 ShowCaret(editor->hWnd);
832 ME_ClearTempStyle(editor);
833 ME_SendSelChange(editor);
836 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
838 ME_Cursor tmp_cursor;
840 y += ME_GetYScrollPos(editor);
842 tmp_cursor = editor->pCursors[0];
843 /* FIXME: do something with the return value of ME_FindPixelPos */
844 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
846 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
847 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
850 ME_InvalidateSelection(editor);
851 editor->pCursors[0] = tmp_cursor;
852 HideCaret(editor->hWnd);
853 ME_MoveCaret(editor);
854 ME_InvalidateSelection(editor);
855 ShowCaret(editor->hWnd);
856 ME_SendSelChange(editor);
859 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
860 int x, int *pOffset, int *pbCaretAtEnd)
862 ME_DisplayItem *pNext, *pLastRun;
863 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
864 assert(pNext->type == diRun);
866 *pbCaretAtEnd = FALSE;
868 int run_x = pNext->member.run.pt.x;
869 int width = pNext->member.run.nWidth;
872 if (pOffset) *pOffset = 0;
875 if (x >= run_x && x < run_x+width)
877 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
878 ME_String *s = pNext->member.run.strText;
886 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
887 } while(pNext && pNext->type == diRun);
889 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
891 pNext = ME_FindItemFwd(pNext, diRun);
892 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
893 if (pOffset) *pOffset = 0;
896 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
897 if (pOffset) *pOffset = 0;
902 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
904 ME_DisplayItem *pRun = pCursor->pRun;
907 if (editor->nUDArrowX != -1)
908 x = editor->nUDArrowX;
910 if (editor->bCaretAtEnd)
912 pRun = ME_FindItemBack(pRun, diRun);
914 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
917 x = pRun->member.run.pt.x;
918 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
920 editor->nUDArrowX = x;
927 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
929 ME_DisplayItem *pRun = pCursor->pRun;
930 ME_DisplayItem *pItem;
931 int x = ME_GetXForArrow(editor, pCursor);
933 if (editor->bCaretAtEnd && !pCursor->nOffset)
934 pRun = ME_FindItemBack(pRun, diRun);
939 /* start of this row */
940 pItem = ME_FindItemBack(pRun, diStartRow);
942 /* start of the previous row */
943 pItem = ME_FindItemBack(pItem, diStartRow);
947 /* start of the next row */
948 pItem = ME_FindItemFwd(pRun, diStartRow);
949 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
954 /* row not found - ignore */
957 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
958 assert(pCursor->pRun);
959 assert(pCursor->pRun->type == diRun);
963 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
965 ME_DisplayItem *pRun = pCursor->pRun;
966 ME_DisplayItem *pLast, *p;
967 int x, y, ys, yd, yp, yprev;
968 ME_Cursor tmp_curs = *pCursor;
970 x = ME_GetXForArrow(editor, pCursor);
971 if (!pCursor->nOffset && editor->bCaretAtEnd)
972 pRun = ME_FindItemBack(pRun, diRun);
974 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
975 assert(p->type == diStartRow);
976 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
977 yprev = ys = y = yp + p->member.row.nYPos;
978 yd = y - editor->sizeWindow.cy;
982 p = ME_FindItemBack(p, diStartRowOrParagraph);
985 if (p->type == diParagraph) { /* crossing paragraphs */
986 if (p->member.para.prev_para == NULL)
988 yp = p->member.para.prev_para->member.para.nYPos;
991 y = yp + p->member.row.nYPos;
998 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
999 ME_UpdateSelection(editor, &tmp_curs);
1000 if (yprev < editor->sizeWindow.cy)
1002 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1007 ME_ScrollUp(editor, ys-yprev);
1009 assert(pCursor->pRun);
1010 assert(pCursor->pRun->type == diRun);
1013 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1014 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1015 In such a situation, clicking the scrollbar restores its position back to the
1016 normal range (ie. sets it to (doclength-screenheight)). */
1018 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1020 ME_DisplayItem *pRun = pCursor->pRun;
1021 ME_DisplayItem *pLast, *p;
1022 int x, y, ys, yd, yp, yprev;
1023 ME_Cursor tmp_curs = *pCursor;
1025 x = ME_GetXForArrow(editor, pCursor);
1026 if (!pCursor->nOffset && editor->bCaretAtEnd)
1027 pRun = ME_FindItemBack(pRun, diRun);
1029 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1030 assert(p->type == diStartRow);
1031 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1032 yprev = ys = y = yp + p->member.row.nYPos;
1033 yd = y + editor->sizeWindow.cy;
1037 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1040 if (p->type == diParagraph) {
1041 yp = p->member.para.nYPos;
1044 y = yp + p->member.row.nYPos;
1051 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1052 ME_UpdateSelection(editor, &tmp_curs);
1053 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1055 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1060 ME_ScrollUp(editor,ys-yprev);
1062 assert(pCursor->pRun);
1063 assert(pCursor->pRun->type == diRun);
1066 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1068 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1069 /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1070 first character of the next row */
1071 assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1072 ME_WrapMarkedParagraphs(editor);
1074 ME_DisplayItem *pRun;
1075 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1076 pRow = ME_FindItemBack(pRow, diStartRow);
1080 pRun = ME_FindItemFwd(pRow, diRun);
1082 pCursor->pRun = pRun;
1083 pCursor->nOffset = 0;
1086 editor->bCaretAtEnd = FALSE;
1089 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1091 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1093 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1095 pCursor->pRun = pRun;
1096 pCursor->nOffset = 0;
1101 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1103 ME_DisplayItem *pRow;
1105 if (editor->bCaretAtEnd && !pCursor->nOffset)
1108 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1110 if (pRow->type == diStartRow) {
1111 /* FIXME WTF was I thinking about here ? */
1112 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1114 pCursor->pRun = pRun;
1115 pCursor->nOffset = 0;
1116 editor->bCaretAtEnd = 1;
1119 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1120 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1121 pCursor->nOffset = 0;
1122 editor->bCaretAtEnd = FALSE;
1125 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1127 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1129 p = ME_FindItemBack(p, diRun);
1131 assert(p->member.run.nFlags & MERF_ENDPARA);
1133 pCursor->nOffset = 0;
1134 editor->bCaretAtEnd = FALSE;
1137 BOOL ME_IsSelection(ME_TextEditor *editor)
1139 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1142 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1144 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1152 BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
1154 ME_Cursor old_anchor = editor->pCursors[1];
1156 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1158 /* any selection was present ? if so, it's no more, repaint ! */
1159 editor->pCursors[1] = editor->pCursors[0];
1160 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1167 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1169 editor->pCursors[1] = *pTempCursor;
1178 void ME_DeleteSelection(ME_TextEditor *editor)
1181 ME_GetSelection(editor, &from, &to);
1182 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1185 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1191 ME_GetSelection(editor, &from, &to);
1192 ME_CursorFromCharOfs(editor, from, &c);
1194 style = c.pRun->member.run.style;
1195 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1198 style = ME_GetInsertStyle(editor, 0);
1202 void ME_SendSelChange(ME_TextEditor *editor)
1206 ME_ClearTempStyle(editor);
1208 if (!(editor->nEventMask & ENM_SELCHANGE))
1211 sc.nmhdr.hwndFrom = editor->hWnd;
1212 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1213 sc.nmhdr.code = EN_SELCHANGE;
1214 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1215 sc.seltyp = SEL_EMPTY;
1216 if (sc.chrg.cpMin != sc.chrg.cpMax)
1217 sc.seltyp |= SEL_TEXT;
1218 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1219 sc.seltyp |= SEL_MULTICHAR;
1220 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1225 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1228 ME_Cursor *p = &editor->pCursors[nCursor];
1229 ME_Cursor tmp_curs = *p;
1230 BOOL success = FALSE;
1232 ME_CheckCharOffsets(editor);
1233 editor->nUDArrowX = -1;
1236 editor->bCaretAtEnd = 0;
1238 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1240 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1243 editor->bCaretAtEnd = 0;
1245 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1247 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1250 ME_MoveCursorLines(editor, &tmp_curs, -1);
1253 ME_MoveCursorLines(editor, &tmp_curs, +1);
1256 ME_ArrowPageUp(editor, &tmp_curs);
1259 ME_ArrowPageDown(editor, &tmp_curs);
1263 ME_ArrowCtrlHome(editor, &tmp_curs);
1265 ME_ArrowHome(editor, &tmp_curs);
1266 editor->bCaretAtEnd = 0;
1271 ME_ArrowCtrlEnd(editor, &tmp_curs);
1273 ME_ArrowEnd(editor, &tmp_curs);
1278 editor->pCursors[1] = tmp_curs;
1281 ME_InvalidateSelection(editor);
1283 HideCaret(editor->hWnd);
1284 ME_EnsureVisible(editor, tmp_curs.pRun);
1285 ME_ShowCaret(editor);
1286 ME_SendSelChange(editor);