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 void ME_SetSelection(ME_TextEditor *editor, int from, int to)
83 if (from == 0 && to == -1)
85 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
86 editor->pCursors[1].nOffset = 0;
87 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
88 editor->pCursors[0].nOffset = 0;
89 ME_InvalidateSelection(editor);
90 ME_ClearTempStyle(editor);
93 if (from == -1 && to == -1) /*-1,-1 means put the selection at the end of the text */
95 editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
96 editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0;
97 ME_InvalidateSelection(editor);
98 ME_ClearTempStyle(editor);
103 editor->pCursors[1] = editor->pCursors[0];
105 ME_ClearTempStyle(editor);
114 ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
115 ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
120 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
121 int *x, int *y, int *height)
123 ME_DisplayItem *pCursorRun = pCursor->pRun;
124 ME_DisplayItem *pSizeRun = pCursor->pRun;
126 assert(!pCursor->nOffset || !editor->bCaretAtEnd);
127 assert(height && x && y);
128 assert(!(ME_GetParagraph(pCursorRun)->member.para.nFlags & MEPF_REWRAP));
129 assert(pCursor->pRun);
130 assert(pCursor->pRun->type == diRun);
132 if (pCursorRun->type == diRun) {
133 ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
136 HDC hDC = GetDC(editor->hWnd);
138 ME_DisplayItem *run = pCursorRun;
139 ME_DisplayItem *para = NULL;
142 ME_InitContext(&c, editor, hDC);
144 if (!pCursor->nOffset && !editor->bCaretAtEnd)
146 ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow);
148 if (prev->type == diRun)
151 assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
152 para = ME_FindItemBack(row, diParagraph);
154 assert(para->type == diParagraph);
155 if (editor->bCaretAtEnd && !pCursor->nOffset &&
156 run == ME_FindItemFwd(row, diRun))
158 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
160 if (tmp->type == diRun)
162 row = ME_FindItemBack(tmp, diStartRow);
163 pSizeRun = run = tmp;
165 assert(run->type == diRun);
166 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, ME_StrLen(run->member.run.strText));
169 if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) {
170 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset);
173 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
174 *x = run->member.run.pt.x + sz.cx;
175 *y = para->member.para.nYPos + row->member.row.nBaseline + pSizeRun->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
177 ME_DestroyContext(&c);
178 ReleaseDC(editor->hWnd, hDC);
182 *height = 10; /* FIXME use global font */
189 ME_MoveCaret(ME_TextEditor *editor)
193 ME_WrapMarkedParagraphs(editor);
194 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
195 CreateCaret(editor->hWnd, NULL, 0, height);
200 void ME_ShowCaret(ME_TextEditor *ed)
206 void ME_HideCaret(ME_TextEditor *ed)
212 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
221 ME_CursorFromCharOfs(editor, nOfs, &c);
222 run = &c.pRun->member.run;
223 if (run->nFlags & MERF_ENDPARA) {
224 if (!ME_FindItemFwd(c.pRun, diParagraph))
228 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
229 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
230 ME_CheckCharOffsets(editor);
232 if (editor->bEmulateVersion10 && nChars)
239 int nIntendedChars = nChars;
240 int nCharsToDelete = nChars;
244 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
247 ME_StrRelPos(run->strText, loc, &nChars);
248 /* nChars is the number of characters that should be deleted from the
249 FOLLOWING runs (these AFTER cursor.pRun)
250 nCharsToDelete is a number of chars to delete from THIS run */
251 nCharsToDelete -= nChars;
252 shift -= nCharsToDelete;
253 TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
254 nCharsToDelete, nIntendedChars, nChars, c.nOffset,
255 debugstr_w(run->strText->szData), run->strText->nLen);
257 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
259 /* undo = reinsert whole run */
260 /* nOfs is a character offset (from the start of the document
261 to the current (deleted) run */
262 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
264 pUndo->di.member.run.nCharOfs = nOfs;
268 /* undo = reinsert partial run */
269 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
271 ME_DestroyString(pUndo->di.member.run.strText);
272 pUndo->di.member.run.nCharOfs = nOfs;
273 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
276 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
277 TRACE("Shift value: %d\n", shift);
278 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
280 /* update cursors (including c) */
281 for (i=-1; i<editor->nCursors; i++) {
282 ME_Cursor *pThisCur = editor->pCursors + i;
283 if (i == -1) pThisCur = &c;
284 if (pThisCur->pRun == cursor.pRun) {
285 if (pThisCur->nOffset > cursor.nOffset) {
286 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
287 pThisCur->nOffset = cursor.nOffset;
289 pThisCur->nOffset -= nCharsToDelete;
290 assert(pThisCur->nOffset >= 0);
291 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
293 if (pThisCur->nOffset == ME_StrVLen(run->strText))
295 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
296 assert(pThisCur->pRun->type == diRun);
297 pThisCur->nOffset = 0;
302 /* c = updated data now */
304 if (c.pRun == cursor.pRun)
305 ME_SkipAndPropagateCharOffset(c.pRun, shift);
307 ME_PropagateCharOffset(c.pRun, shift);
309 if (!ME_StrVLen(cursor.pRun->member.run.strText))
311 TRACE("Removing useless run\n");
312 ME_Remove(cursor.pRun);
313 ME_DestroyDisplayItem(cursor.pRun);
318 ME_CheckCharOffsets(editor);
325 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
328 assert(nCursor>=0 && nCursor<editor->nCursors);
329 ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
332 static ME_DisplayItem *
333 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
334 const WCHAR *str, int len, ME_Style *style,
337 ME_Cursor *p = &editor->pCursors[nCursor];
339 editor->bCaretAtEnd = FALSE;
341 assert(p->pRun->type == diRun);
343 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
347 /* FIXME this is temporary, just to have something to test how bad graphics handler is */
348 void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
350 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
354 if (ME_IsSelection(editor))
355 ME_DeleteSelection(editor);
357 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
359 ME_SendSelChange(editor);
364 ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor)
367 ME_DisplayItem *p, *run;
368 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
370 p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle,
373 while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun)
375 if (run->member.run.nFlags & MERF_CELL)
377 assert(run->member.run.pCell->next);
378 p->member.run.pCell = run->member.run.pCell->next;
382 assert(run->type == diParagraph);
383 assert(run->member.para.bTable);
384 assert(run->member.para.pCells);
385 p->member.run.pCell = run->member.para.pCells;
389 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
390 const WCHAR *str, int len, ME_Style *style)
394 /* FIXME: is this too slow? */
395 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
396 int freeSpace = editor->nTextLimit - ME_GetTextLength(editor);
400 /* FIXME really HERE ? */
401 if (ME_IsSelection(editor))
402 ME_DeleteSelection(editor);
404 assert(nCursor>=0 && nCursor<editor->nCursors);
407 len = min(len, freeSpace);
411 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
412 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
414 if (pos-str < len && *pos == '\t') { /* handle tabs */
418 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
420 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
429 if (pos-str < len) { /* handle EOLs */
430 ME_DisplayItem *tp, *end_run;
433 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
434 p = &editor->pCursors[nCursor];
436 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
437 p = &editor->pCursors[nCursor];
439 tmp_style = ME_GetInsertStyle(editor, nCursor);
440 /* ME_SplitParagraph increases style refcount */
441 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
442 p->pRun = ME_FindItemFwd(tp, diRun);
443 end_run = ME_FindItemBack(tp, diRun);
444 ME_ReleaseStyle(end_run->member.run.style);
445 end_run->member.run.style = tmp_style;
447 if(pos-str < len && *pos =='\r')
449 if(pos-str < len && *pos =='\n')
457 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
464 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
466 ME_DisplayItem *pRun = pCursor->pRun;
470 if (!pCursor->nOffset)
473 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
480 if (pRun->member.para.prev_para->type == diTextStart)
482 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
483 /* every paragraph ought to have at least one run */
484 assert(pRun && pRun->type == diRun);
485 assert(pRun->member.run.nFlags & MERF_ENDPARA);
488 assert(pRun->type != diRun && pRun->type != diParagraph);
491 } while (RUN_IS_HIDDEN(&pRun->member.run));
492 pCursor->pRun = pRun;
493 if (pRun->member.run.nFlags & MERF_ENDPARA)
494 pCursor->nOffset = 0;
496 pCursor->nOffset = pRun->member.run.strText->nLen;
499 if (pCursor->nOffset)
500 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
505 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
507 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
509 if (new_ofs < pRun->member.run.strText->nLen)
511 pCursor->nOffset = new_ofs;
516 pRun = ME_FindItemFwd(pRun, diRun);
517 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
520 pCursor->pRun = pRun;
521 pCursor->nOffset = 0;
530 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
532 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
533 int nOffset = cursor->nOffset;
537 /* Backward movement */
540 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
541 nOffset, WB_MOVEWORDLEFT);
544 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
545 if (pOtherRun->type == diRun)
547 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
548 pOtherRun->member.run.strText->nLen - 1,
550 && !(pRun->member.run.nFlags & MERF_ENDPARA)
551 && !(cursor->pRun == pRun && cursor->nOffset == 0)
552 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
556 nOffset = pOtherRun->member.run.strText->nLen;
558 else if (pOtherRun->type == diParagraph)
560 if (cursor->pRun == pRun && cursor->nOffset == 0)
562 /* Paragraph breaks are treated as separate words */
563 if (pOtherRun->member.para.prev_para->type == diTextStart)
565 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
573 /* Forward movement */
574 BOOL last_delim = FALSE;
578 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
579 nOffset, WB_ISDELIMITER))
581 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
582 nOffset, WB_MOVEWORDRIGHT);
583 if (nOffset < pRun->member.run.strText->nLen)
585 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
586 if (pOtherRun->type == diRun)
588 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
589 nOffset - 1, WB_ISDELIMITER);
593 else if (pOtherRun->type == diParagraph)
595 if (cursor->pRun == pRun)
596 pRun = ME_FindItemFwd(pOtherRun, diRun);
602 if (cursor->pRun == pRun)
610 cursor->nOffset = nOffset;
616 ME_SelectWord(ME_TextEditor *editor)
618 if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
619 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
620 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
621 ME_InvalidateSelection(editor);
622 ME_SendSelChange(editor);
626 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
628 ME_Cursor *pCursor = &editor->pCursors[nCursor];
630 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
631 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
634 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
636 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
642 while(p != editor->pBuffer->pLast)
644 if (p->type == diParagraph)
646 int ry = y - p->member.para.nYPos;
649 result->pRun = ME_FindItemFwd(p, diRun);
653 if (ry >= p->member.para.nHeight)
655 p = p->member.para.next_para;
658 p = ME_FindItemFwd(p, diStartRow);
662 if (p->type == diStartRow)
664 int ry = y - p->member.row.nYPos;
667 if (ry >= p->member.row.nHeight)
669 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
670 if (p->type != diStartRow)
674 p = ME_FindItemFwd(p, diRun);
677 if (p->type == diRun)
680 rx = x - p->member.run.pt.x;
683 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
688 if (p->type == diRun)
690 rx = x - p->member.run.pt.x;
691 goto continue_search;
693 if (p->type == diStartRow)
695 p = ME_FindItemFwd(p, diRun);
698 rx = 0; /* FIXME not sure */
701 if (p->type == diParagraph || p->type == diTextEnd)
703 rx = 0; /* FIXME not sure */
711 if (p->member.run.nFlags & MERF_ENDPARA)
714 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
715 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
717 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
726 result->pRun = ME_FindItemBack(p, diRun);
728 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
734 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
739 GetClientRect(editor->hWnd, &rc);
740 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
742 y += ME_GetYScrollPos(editor);
743 ME_FindPixelPos(editor, x, y, &cursor, NULL);
744 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
745 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
749 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
751 ME_Cursor tmp_cursor;
752 int is_selection = 0;
754 editor->nUDArrowX = -1;
756 y += ME_GetYScrollPos(editor);
758 tmp_cursor = editor->pCursors[0];
759 is_selection = ME_IsSelection(editor);
761 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
763 if (GetKeyState(VK_SHIFT)>=0)
765 editor->pCursors[1] = editor->pCursors[0];
770 editor->pCursors[1] = tmp_cursor;
774 ME_InvalidateSelection(editor);
775 HideCaret(editor->hWnd);
776 ME_MoveCaret(editor);
777 ShowCaret(editor->hWnd);
778 ME_ClearTempStyle(editor);
779 ME_SendSelChange(editor);
782 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
784 ME_Cursor tmp_cursor;
786 y += ME_GetYScrollPos(editor);
788 tmp_cursor = editor->pCursors[0];
789 /* FIXME: do something with the return value of ME_FindPixelPos */
790 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
792 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
793 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
796 ME_InvalidateSelection(editor);
797 editor->pCursors[0] = tmp_cursor;
798 HideCaret(editor->hWnd);
799 ME_MoveCaret(editor);
800 ME_InvalidateSelection(editor);
801 ShowCaret(editor->hWnd);
802 ME_SendSelChange(editor);
805 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
806 int x, int *pOffset, int *pbCaretAtEnd)
808 ME_DisplayItem *pNext, *pLastRun;
809 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
810 assert(pNext->type == diRun);
812 *pbCaretAtEnd = FALSE;
814 int run_x = pNext->member.run.pt.x;
815 int width = pNext->member.run.nWidth;
818 if (pOffset) *pOffset = 0;
821 if (x >= run_x && x < run_x+width)
823 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
824 ME_String *s = pNext->member.run.strText;
832 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
833 } while(pNext && pNext->type == diRun);
835 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
837 pNext = ME_FindItemFwd(pNext, diRun);
838 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
839 if (pOffset) *pOffset = 0;
842 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
843 if (pOffset) *pOffset = 0;
848 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
850 ME_DisplayItem *pRun = pCursor->pRun;
853 if (editor->nUDArrowX != -1)
854 x = editor->nUDArrowX;
856 if (editor->bCaretAtEnd)
858 pRun = ME_FindItemBack(pRun, diRun);
860 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
863 x = pRun->member.run.pt.x;
864 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
866 editor->nUDArrowX = x;
873 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
875 ME_DisplayItem *pRun = pCursor->pRun;
876 ME_DisplayItem *pItem;
877 int x = ME_GetXForArrow(editor, pCursor);
879 if (editor->bCaretAtEnd && !pCursor->nOffset)
880 pRun = ME_FindItemBack(pRun, diRun);
885 /* start of this row */
886 pItem = ME_FindItemBack(pRun, diStartRow);
888 /* start of the previous row */
889 pItem = ME_FindItemBack(pItem, diStartRow);
893 /* start of the next row */
894 pItem = ME_FindItemFwd(pRun, diStartRow);
895 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
900 /* row not found - ignore */
903 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
904 assert(pCursor->pRun);
905 assert(pCursor->pRun->type == diRun);
909 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
911 ME_DisplayItem *pRun = pCursor->pRun;
912 ME_DisplayItem *pLast, *p;
913 int x, y, ys, yd, yp, yprev;
914 ME_Cursor tmp_curs = *pCursor;
916 x = ME_GetXForArrow(editor, pCursor);
917 if (!pCursor->nOffset && editor->bCaretAtEnd)
918 pRun = ME_FindItemBack(pRun, diRun);
920 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
921 assert(p->type == diStartRow);
922 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
923 yprev = ys = y = yp + p->member.row.nYPos;
924 yd = y - editor->sizeWindow.cy;
928 p = ME_FindItemBack(p, diStartRowOrParagraph);
931 if (p->type == diParagraph) { /* crossing paragraphs */
932 if (p->member.para.prev_para == NULL)
934 yp = p->member.para.prev_para->member.para.nYPos;
937 y = yp + p->member.row.nYPos;
944 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
945 ME_UpdateSelection(editor, &tmp_curs);
946 if (yprev < editor->sizeWindow.cy)
948 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
952 ME_Scroll(editor, 0, ys-yprev);
955 assert(pCursor->pRun);
956 assert(pCursor->pRun->type == diRun);
959 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
960 of pixels, even if it makes the scroll bar position exceed its normal maximum.
961 In such a situation, clicking the scrollbar restores its position back to the
962 normal range (ie. sets it to (doclength-screenheight)). */
964 static void ME_ArrowPageDown(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_FindItemFwd(p, diStartRowOrParagraph);
986 if (p->type == diParagraph) {
987 yp = p->member.para.nYPos;
990 y = yp + p->member.row.nYPos;
997 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
998 ME_UpdateSelection(editor, &tmp_curs);
999 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1001 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1005 ME_Scroll(editor, 0, ys-yprev);
1008 assert(pCursor->pRun);
1009 assert(pCursor->pRun->type == diRun);
1012 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1014 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1015 /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1016 first character of the next row */
1017 assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1018 ME_WrapMarkedParagraphs(editor);
1020 ME_DisplayItem *pRun;
1021 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1022 pRow = ME_FindItemBack(pRow, diStartRow);
1026 pRun = ME_FindItemFwd(pRow, diRun);
1028 pCursor->pRun = pRun;
1029 pCursor->nOffset = 0;
1032 editor->bCaretAtEnd = FALSE;
1035 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1037 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1039 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1041 pCursor->pRun = pRun;
1042 pCursor->nOffset = 0;
1047 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1049 ME_DisplayItem *pRow;
1051 if (editor->bCaretAtEnd && !pCursor->nOffset)
1054 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1056 if (pRow->type == diStartRow) {
1057 /* FIXME WTF was I thinking about here ? */
1058 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1060 pCursor->pRun = pRun;
1061 pCursor->nOffset = 0;
1062 editor->bCaretAtEnd = 1;
1065 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1066 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1067 pCursor->nOffset = 0;
1068 editor->bCaretAtEnd = FALSE;
1071 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1073 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1075 p = ME_FindItemBack(p, diRun);
1077 assert(p->member.run.nFlags & MERF_ENDPARA);
1079 pCursor->nOffset = 0;
1080 editor->bCaretAtEnd = FALSE;
1083 BOOL ME_IsSelection(ME_TextEditor *editor)
1085 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1088 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1090 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1098 BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
1100 ME_Cursor old_anchor = editor->pCursors[1];
1102 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1104 /* any selection was present ? if so, it's no more, repaint ! */
1105 editor->pCursors[1] = editor->pCursors[0];
1106 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1113 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1115 editor->pCursors[1] = *pTempCursor;
1124 void ME_DeleteSelection(ME_TextEditor *editor)
1127 ME_GetSelection(editor, &from, &to);
1128 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1131 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1137 ME_GetSelection(editor, &from, &to);
1138 ME_CursorFromCharOfs(editor, from, &c);
1140 style = c.pRun->member.run.style;
1141 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1144 style = ME_GetInsertStyle(editor, 0);
1148 void ME_SendSelChange(ME_TextEditor *editor)
1152 ME_ClearTempStyle(editor);
1154 if (!(editor->nEventMask & ENM_SELCHANGE))
1157 sc.nmhdr.hwndFrom = editor->hWnd;
1158 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1159 sc.nmhdr.code = EN_SELCHANGE;
1160 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1161 sc.seltyp = SEL_EMPTY;
1162 if (sc.chrg.cpMin != sc.chrg.cpMax)
1163 sc.seltyp |= SEL_TEXT;
1164 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1165 sc.seltyp |= SEL_MULTICHAR;
1166 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1171 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1174 ME_Cursor *p = &editor->pCursors[nCursor];
1175 ME_Cursor tmp_curs = *p;
1176 BOOL success = FALSE;
1178 ME_CheckCharOffsets(editor);
1179 editor->nUDArrowX = -1;
1182 editor->bCaretAtEnd = 0;
1184 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1186 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1189 editor->bCaretAtEnd = 0;
1191 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1193 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1196 ME_MoveCursorLines(editor, &tmp_curs, -1);
1199 ME_MoveCursorLines(editor, &tmp_curs, +1);
1202 ME_ArrowPageUp(editor, &tmp_curs);
1205 ME_ArrowPageDown(editor, &tmp_curs);
1209 ME_ArrowCtrlHome(editor, &tmp_curs);
1211 ME_ArrowHome(editor, &tmp_curs);
1212 editor->bCaretAtEnd = 0;
1217 ME_ArrowCtrlEnd(editor, &tmp_curs);
1219 ME_ArrowEnd(editor, &tmp_curs);
1224 editor->pCursors[1] = tmp_curs;
1227 ME_InvalidateSelection(editor);
1229 HideCaret(editor->hWnd);
1230 ME_EnsureVisible(editor, tmp_curs.pRun);
1231 ME_ShowCaret(editor);
1232 ME_SendSelChange(editor);