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 oldLen = ME_GetTextLength(editor);
454 /* text operations set modified state */
455 editor->nModifyStep = 1;
459 assert(nCursor>=0 && nCursor<editor->nCursors);
463 /* grow the text limit to fit our text */
464 if(editor->nTextLimit < oldLen +len)
465 editor->nTextLimit = oldLen + len;
470 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
471 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
473 if (pos-str < len && *pos == '\t') { /* handle tabs */
477 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
479 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
488 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
489 if (!editor->bEmulateVersion10 && pos-str < len-2 && pos[0] == '\r' && pos[1] == '\r' && pos[2] == '\n') {
493 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
495 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
504 if (pos-str < len) { /* handle EOLs */
505 ME_DisplayItem *tp, *end_run;
508 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
509 p = &editor->pCursors[nCursor];
511 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
512 p = &editor->pCursors[nCursor];
514 tmp_style = ME_GetInsertStyle(editor, nCursor);
515 /* ME_SplitParagraph increases style refcount */
516 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
517 p->pRun = ME_FindItemFwd(tp, diRun);
518 end_run = ME_FindItemBack(tp, diRun);
519 ME_ReleaseStyle(end_run->member.run.style);
520 end_run->member.run.style = tmp_style;
522 if(pos-str < len && *pos =='\r')
524 if(pos-str < len && *pos =='\n')
532 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
539 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
541 ME_DisplayItem *pRun = pCursor->pRun;
545 if (!pCursor->nOffset)
548 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
555 if (pRun->member.para.prev_para->type == diTextStart)
557 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
558 /* every paragraph ought to have at least one run */
559 assert(pRun && pRun->type == diRun);
560 assert(pRun->member.run.nFlags & MERF_ENDPARA);
563 assert(pRun->type != diRun && pRun->type != diParagraph);
566 } while (RUN_IS_HIDDEN(&pRun->member.run));
567 pCursor->pRun = pRun;
568 if (pRun->member.run.nFlags & MERF_ENDPARA)
569 pCursor->nOffset = 0;
571 pCursor->nOffset = pRun->member.run.strText->nLen;
574 if (pCursor->nOffset)
575 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
580 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
582 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
584 if (new_ofs < pRun->member.run.strText->nLen)
586 pCursor->nOffset = new_ofs;
591 pRun = ME_FindItemFwd(pRun, diRun);
592 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
595 pCursor->pRun = pRun;
596 pCursor->nOffset = 0;
605 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
607 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
608 int nOffset = cursor->nOffset;
612 /* Backward movement */
615 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
616 nOffset, WB_MOVEWORDLEFT);
619 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
620 if (pOtherRun->type == diRun)
622 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
623 pOtherRun->member.run.strText->nLen - 1,
625 && !(pRun->member.run.nFlags & MERF_ENDPARA)
626 && !(cursor->pRun == pRun && cursor->nOffset == 0)
627 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
631 nOffset = pOtherRun->member.run.strText->nLen;
633 else if (pOtherRun->type == diParagraph)
635 if (cursor->pRun == pRun && cursor->nOffset == 0)
637 /* Paragraph breaks are treated as separate words */
638 if (pOtherRun->member.para.prev_para->type == diTextStart)
640 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
648 /* Forward movement */
649 BOOL last_delim = FALSE;
653 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
654 nOffset, WB_ISDELIMITER))
656 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
657 nOffset, WB_MOVEWORDRIGHT);
658 if (nOffset < pRun->member.run.strText->nLen)
660 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
661 if (pOtherRun->type == diRun)
663 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
664 nOffset - 1, WB_ISDELIMITER);
668 else if (pOtherRun->type == diParagraph)
670 if (cursor->pRun == pRun)
671 pRun = ME_FindItemFwd(pOtherRun, diRun);
677 if (cursor->pRun == pRun)
685 cursor->nOffset = nOffset;
691 ME_SelectWord(ME_TextEditor *editor)
693 if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
694 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
695 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
696 ME_InvalidateSelection(editor);
697 ME_SendSelChange(editor);
701 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
703 ME_Cursor *pCursor = &editor->pCursors[nCursor];
704 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
705 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
708 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
710 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
716 while(p != editor->pBuffer->pLast)
718 if (p->type == diParagraph)
720 int ry = y - p->member.para.nYPos;
723 result->pRun = ME_FindItemFwd(p, diRun);
727 if (ry >= p->member.para.nHeight)
729 p = p->member.para.next_para;
732 p = ME_FindItemFwd(p, diStartRow);
736 if (p->type == diStartRow)
738 int ry = y - p->member.row.nYPos;
741 if (ry >= p->member.row.nHeight)
743 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
744 if (p->type != diStartRow)
748 p = ME_FindItemFwd(p, diRun);
751 if (p->type == diRun)
754 rx = x - p->member.run.pt.x;
757 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
762 if (p->type == diRun)
764 rx = x - p->member.run.pt.x;
765 goto continue_search;
767 if (p->type == diStartRow)
769 p = ME_FindItemFwd(p, diRun);
772 rx = 0; /* FIXME not sure */
775 if (p->type == diParagraph || p->type == diTextEnd)
777 rx = 0; /* FIXME not sure */
785 if (p->member.run.nFlags & MERF_ENDPARA)
788 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
789 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
791 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
800 result->pRun = ME_FindItemBack(p, diRun);
802 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
808 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
813 GetClientRect(editor->hWnd, &rc);
814 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
816 y += ME_GetYScrollPos(editor);
817 ME_FindPixelPos(editor, x, y, &cursor, NULL);
818 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
819 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
823 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
825 ME_Cursor tmp_cursor;
826 int is_selection = 0;
828 editor->nUDArrowX = -1;
830 y += ME_GetYScrollPos(editor);
832 tmp_cursor = editor->pCursors[0];
833 is_selection = ME_IsSelection(editor);
835 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
837 if (GetKeyState(VK_SHIFT)>=0)
839 editor->pCursors[1] = editor->pCursors[0];
844 editor->pCursors[1] = tmp_cursor;
848 ME_InvalidateSelection(editor);
849 HideCaret(editor->hWnd);
850 ME_MoveCaret(editor);
851 ShowCaret(editor->hWnd);
852 ME_ClearTempStyle(editor);
853 ME_SendSelChange(editor);
856 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
858 ME_Cursor tmp_cursor;
860 y += ME_GetYScrollPos(editor);
862 tmp_cursor = editor->pCursors[0];
863 /* FIXME: do something with the return value of ME_FindPixelPos */
864 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
866 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
867 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
870 ME_InvalidateSelection(editor);
871 editor->pCursors[0] = tmp_cursor;
872 HideCaret(editor->hWnd);
873 ME_MoveCaret(editor);
874 ME_InvalidateSelection(editor);
875 ShowCaret(editor->hWnd);
876 ME_SendSelChange(editor);
879 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
880 int x, int *pOffset, int *pbCaretAtEnd)
882 ME_DisplayItem *pNext, *pLastRun;
883 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
884 assert(pNext->type == diRun);
886 *pbCaretAtEnd = FALSE;
888 int run_x = pNext->member.run.pt.x;
889 int width = pNext->member.run.nWidth;
892 if (pOffset) *pOffset = 0;
895 if (x >= run_x && x < run_x+width)
897 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
898 ME_String *s = pNext->member.run.strText;
906 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
907 } while(pNext && pNext->type == diRun);
909 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
911 pNext = ME_FindItemFwd(pNext, diRun);
912 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
913 if (pOffset) *pOffset = 0;
916 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
917 if (pOffset) *pOffset = 0;
922 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
924 ME_DisplayItem *pRun = pCursor->pRun;
927 if (editor->nUDArrowX != -1)
928 x = editor->nUDArrowX;
930 if (editor->bCaretAtEnd)
932 pRun = ME_FindItemBack(pRun, diRun);
934 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
937 x = pRun->member.run.pt.x;
938 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
940 editor->nUDArrowX = x;
947 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
949 ME_DisplayItem *pRun = pCursor->pRun;
950 ME_DisplayItem *pItem;
951 int x = ME_GetXForArrow(editor, pCursor);
953 if (editor->bCaretAtEnd && !pCursor->nOffset)
954 pRun = ME_FindItemBack(pRun, diRun);
959 /* start of this row */
960 pItem = ME_FindItemBack(pRun, diStartRow);
962 /* start of the previous row */
963 pItem = ME_FindItemBack(pItem, diStartRow);
967 /* start of the next row */
968 pItem = ME_FindItemFwd(pRun, diStartRow);
969 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
974 /* row not found - ignore */
977 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
978 assert(pCursor->pRun);
979 assert(pCursor->pRun->type == diRun);
983 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
985 ME_DisplayItem *pRun = pCursor->pRun;
986 ME_DisplayItem *pLast, *p;
987 int x, y, ys, yd, yp, yprev;
988 ME_Cursor tmp_curs = *pCursor;
990 x = ME_GetXForArrow(editor, pCursor);
991 if (!pCursor->nOffset && editor->bCaretAtEnd)
992 pRun = ME_FindItemBack(pRun, diRun);
994 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
995 assert(p->type == diStartRow);
996 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
997 yprev = ys = y = yp + p->member.row.nYPos;
998 yd = y - editor->sizeWindow.cy;
1002 p = ME_FindItemBack(p, diStartRowOrParagraph);
1005 if (p->type == diParagraph) { /* crossing paragraphs */
1006 if (p->member.para.prev_para == NULL)
1008 yp = p->member.para.prev_para->member.para.nYPos;
1011 y = yp + p->member.row.nYPos;
1018 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1019 ME_UpdateSelection(editor, &tmp_curs);
1020 if (yprev < editor->sizeWindow.cy)
1022 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1027 ME_ScrollUp(editor, ys-yprev);
1029 assert(pCursor->pRun);
1030 assert(pCursor->pRun->type == diRun);
1033 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1034 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1035 In such a situation, clicking the scrollbar restores its position back to the
1036 normal range (ie. sets it to (doclength-screenheight)). */
1038 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1040 ME_DisplayItem *pRun = pCursor->pRun;
1041 ME_DisplayItem *pLast, *p;
1042 int x, y, ys, yd, yp, yprev;
1043 ME_Cursor tmp_curs = *pCursor;
1045 x = ME_GetXForArrow(editor, pCursor);
1046 if (!pCursor->nOffset && editor->bCaretAtEnd)
1047 pRun = ME_FindItemBack(pRun, diRun);
1049 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1050 assert(p->type == diStartRow);
1051 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1052 yprev = ys = y = yp + p->member.row.nYPos;
1053 yd = y + editor->sizeWindow.cy;
1057 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1060 if (p->type == diParagraph) {
1061 yp = p->member.para.nYPos;
1064 y = yp + p->member.row.nYPos;
1071 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1072 ME_UpdateSelection(editor, &tmp_curs);
1073 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1075 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1080 ME_ScrollUp(editor,ys-yprev);
1082 assert(pCursor->pRun);
1083 assert(pCursor->pRun->type == diRun);
1086 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1088 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1089 /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1090 first character of the next row */
1091 assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1092 ME_WrapMarkedParagraphs(editor);
1094 ME_DisplayItem *pRun;
1095 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1096 pRow = ME_FindItemBack(pRow, diStartRow);
1100 pRun = ME_FindItemFwd(pRow, diRun);
1102 pCursor->pRun = pRun;
1103 pCursor->nOffset = 0;
1106 editor->bCaretAtEnd = FALSE;
1109 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1111 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1113 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1115 pCursor->pRun = pRun;
1116 pCursor->nOffset = 0;
1121 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1123 ME_DisplayItem *pRow;
1125 if (editor->bCaretAtEnd && !pCursor->nOffset)
1128 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1130 if (pRow->type == diStartRow) {
1131 /* FIXME WTF was I thinking about here ? */
1132 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1134 pCursor->pRun = pRun;
1135 pCursor->nOffset = 0;
1136 editor->bCaretAtEnd = 1;
1139 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1140 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1141 pCursor->nOffset = 0;
1142 editor->bCaretAtEnd = FALSE;
1145 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1147 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1149 p = ME_FindItemBack(p, diRun);
1151 assert(p->member.run.nFlags & MERF_ENDPARA);
1153 pCursor->nOffset = 0;
1154 editor->bCaretAtEnd = FALSE;
1157 BOOL ME_IsSelection(ME_TextEditor *editor)
1159 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1162 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1164 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1172 BOOL ME_UpdateSelection(ME_TextEditor *editor, const ME_Cursor *pTempCursor)
1174 ME_Cursor old_anchor = editor->pCursors[1];
1176 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1178 /* any selection was present ? if so, it's no more, repaint ! */
1179 editor->pCursors[1] = editor->pCursors[0];
1180 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1187 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1189 editor->pCursors[1] = *pTempCursor;
1198 void ME_DeleteSelection(ME_TextEditor *editor)
1201 ME_GetSelection(editor, &from, &to);
1202 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1205 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1211 ME_GetSelection(editor, &from, &to);
1212 ME_CursorFromCharOfs(editor, from, &c);
1214 style = c.pRun->member.run.style;
1215 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1218 style = ME_GetInsertStyle(editor, 0);
1222 void ME_SendSelChange(ME_TextEditor *editor)
1226 ME_ClearTempStyle(editor);
1228 if (!(editor->nEventMask & ENM_SELCHANGE))
1231 sc.nmhdr.hwndFrom = editor->hWnd;
1232 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1233 sc.nmhdr.code = EN_SELCHANGE;
1234 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1235 sc.seltyp = SEL_EMPTY;
1236 if (sc.chrg.cpMin != sc.chrg.cpMax)
1237 sc.seltyp |= SEL_TEXT;
1238 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1239 sc.seltyp |= SEL_MULTICHAR;
1240 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1245 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1248 ME_Cursor *p = &editor->pCursors[nCursor];
1249 ME_Cursor tmp_curs = *p;
1250 BOOL success = FALSE;
1252 ME_CheckCharOffsets(editor);
1253 editor->nUDArrowX = -1;
1256 editor->bCaretAtEnd = 0;
1258 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1260 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1263 editor->bCaretAtEnd = 0;
1265 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1267 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1270 ME_MoveCursorLines(editor, &tmp_curs, -1);
1273 ME_MoveCursorLines(editor, &tmp_curs, +1);
1276 ME_ArrowPageUp(editor, &tmp_curs);
1279 ME_ArrowPageDown(editor, &tmp_curs);
1283 ME_ArrowCtrlHome(editor, &tmp_curs);
1285 ME_ArrowHome(editor, &tmp_curs);
1286 editor->bCaretAtEnd = 0;
1291 ME_ArrowCtrlEnd(editor, &tmp_curs);
1293 ME_ArrowEnd(editor, &tmp_curs);
1298 editor->pCursors[1] = tmp_curs;
1301 ME_InvalidateSelection(editor);
1303 HideCaret(editor->hWnd);
1304 ME_EnsureVisible(editor, tmp_curs.pRun);
1305 ME_ShowCaret(editor);
1306 ME_SendSelChange(editor);