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);
30 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
32 *from = ME_GetCursorOfs(editor, 0);
33 *to = ME_GetCursorOfs(editor, 1);
43 int ME_GetTextLength(ME_TextEditor *editor)
45 return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0);
49 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
53 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
55 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
58 length = ME_GetTextLength(editor);
60 if ((GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_MULTILINE)
61 && (how->flags & GTL_USECRLF)
62 && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
63 length += editor->nParagraphs - 1;
65 if (how->flags & GTL_NUMBYTES)
69 if (how->codepage == 1200)
71 if (how->flags & GTL_PRECISE)
72 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
73 if (GetCPInfo(how->codepage, &cpinfo))
74 return length * cpinfo.MaxCharSize;
75 ERR("Invalid codepage %u\n", how->codepage);
82 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
85 const int len = ME_GetTextLength(editor);
87 /* all negative values are effectively the same */
94 if (from == 0 && to == -1)
96 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
97 editor->pCursors[1].nOffset = 0;
98 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
99 editor->pCursors[0].nOffset = 0;
100 ME_InvalidateSelection(editor);
101 ME_ClearTempStyle(editor);
105 /* if both values are equal and also out of bound, that means to */
106 /* put the selection at the end of the text */
107 if ((from == to) && (to < 0 || to > len))
113 /* if from is negative and to is positive then selection is */
114 /* deselected and caret moved to end of the current selection */
118 ME_GetSelection(editor, &start, &end);
119 editor->pCursors[1] = editor->pCursors[0];
121 ME_ClearTempStyle(editor);
125 /* adjust to if it's a negative value */
129 /* flip from and to if they are reversed */
137 /* after fiddling with the values, we find from > len && to > len */
140 /* special case with to too big */
147 editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
148 editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0;
149 ME_InvalidateSelection(editor);
150 ME_ClearTempStyle(editor);
154 ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
155 ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
161 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
162 int *x, int *y, int *height)
164 ME_DisplayItem *pCursorRun = pCursor->pRun;
165 ME_DisplayItem *pSizeRun = pCursor->pRun;
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)
186 ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrParagraph);
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,
207 &run->member.run, ME_StrLen(run->member.run.strText),
208 row->member.row.nLMargin);
211 if (pCursor->nOffset) {
212 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset,
213 row->member.row.nLMargin);
216 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
217 *x = run->member.run.pt.x + sz.cx;
218 *y = para->member.para.nYPos + row->member.row.nBaseline + run->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
219 ME_DestroyContext(&c, editor->hWnd);
223 *height = 10; /* FIXME use global font */
230 ME_MoveCaret(ME_TextEditor *editor)
234 if (ME_WrapMarkedParagraphs(editor))
235 ME_UpdateScrollBar(editor);
236 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
237 if(editor->bHaveFocus && !ME_IsSelection(editor))
241 GetClientRect(editor->hWnd, &rect);
242 x = min(x, rect.right-2);
243 CreateCaret(editor->hWnd, NULL, 0, height);
249 void ME_ShowCaret(ME_TextEditor *ed)
252 if(ed->bHaveFocus && !ME_IsSelection(ed))
256 void ME_HideCaret(ME_TextEditor *ed)
258 if(!ed->bHaveFocus || ME_IsSelection(ed))
265 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
274 ME_CursorFromCharOfs(editor, nOfs, &c);
275 run = &c.pRun->member.run;
276 if (run->nFlags & MERF_ENDPARA) {
277 int eollen = run->nCR + run->nLF;
279 if (!ME_FindItemFwd(c.pRun, diParagraph))
283 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
284 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
285 ME_CheckCharOffsets(editor);
286 nChars -= (eollen < nChars) ? eollen : nChars;
292 int nIntendedChars = nChars;
293 int nCharsToDelete = nChars;
297 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
300 ME_StrRelPos(run->strText, loc, &nChars);
301 /* nChars is the number of characters that should be deleted from the
302 FOLLOWING runs (these AFTER cursor.pRun)
303 nCharsToDelete is a number of chars to delete from THIS run */
304 nCharsToDelete -= nChars;
305 shift -= nCharsToDelete;
306 TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
307 nCharsToDelete, nIntendedChars, nChars, c.nOffset,
308 debugstr_w(run->strText->szData), run->strText->nLen);
310 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
312 /* undo = reinsert whole run */
313 /* nOfs is a character offset (from the start of the document
314 to the current (deleted) run */
315 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
317 pUndo->di.member.run.nCharOfs = nOfs;
321 /* undo = reinsert partial run */
322 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
324 ME_DestroyString(pUndo->di.member.run.strText);
325 pUndo->di.member.run.nCharOfs = nOfs;
326 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
329 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
330 TRACE("Shift value: %d\n", shift);
331 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
333 /* update cursors (including c) */
334 for (i=-1; i<editor->nCursors; i++) {
335 ME_Cursor *pThisCur = editor->pCursors + i;
336 if (i == -1) pThisCur = &c;
337 if (pThisCur->pRun == cursor.pRun) {
338 if (pThisCur->nOffset > cursor.nOffset) {
339 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
340 pThisCur->nOffset = cursor.nOffset;
342 pThisCur->nOffset -= nCharsToDelete;
343 assert(pThisCur->nOffset >= 0);
344 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
346 if (pThisCur->nOffset == ME_StrVLen(run->strText))
348 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
349 assert(pThisCur->pRun->type == diRun);
350 pThisCur->nOffset = 0;
355 /* c = updated data now */
357 if (c.pRun == cursor.pRun)
358 ME_SkipAndPropagateCharOffset(c.pRun, shift);
360 ME_PropagateCharOffset(c.pRun, shift);
362 if (!ME_StrVLen(cursor.pRun->member.run.strText))
364 TRACE("Removing useless run\n");
365 ME_Remove(cursor.pRun);
366 ME_DestroyDisplayItem(cursor.pRun);
371 ME_CheckCharOffsets(editor);
378 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
381 assert(nCursor>=0 && nCursor<editor->nCursors);
382 /* text operations set modified state */
383 editor->nModifyStep = 1;
384 ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
387 static ME_DisplayItem *
388 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
389 const WCHAR *str, int len, ME_Style *style,
392 ME_Cursor *p = &editor->pCursors[nCursor];
394 editor->bCaretAtEnd = FALSE;
396 assert(p->pRun->type == diRun);
398 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
402 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
404 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
409 if (ME_IsSelection(editor))
410 ME_DeleteSelection(editor);
412 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
414 di->member.run.ole_obj = ALLOC_OBJ(*reo);
415 ME_CopyReObject(di->member.run.ole_obj, reo);
416 ME_SendSelChange(editor);
420 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
422 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
427 if (ME_IsSelection(editor))
428 ME_DeleteSelection(editor);
430 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
432 ME_SendSelChange(editor);
436 ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor)
439 ME_DisplayItem *p, *run;
440 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
442 p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle,
445 while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun)
447 if (run->member.run.nFlags & MERF_CELL)
449 assert(run->member.run.pCell->next);
450 p->member.run.pCell = run->member.run.pCell->next;
454 assert(run->type == diParagraph);
455 assert(run->member.para.pFmt);
456 assert(run->member.para.pFmt->dwMask & PFM_TABLE);
457 assert(run->member.para.pFmt->wEffects & PFE_TABLE);
458 assert(run->member.para.pCells);
459 p->member.run.pCell = run->member.para.pCells;
463 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
464 const WCHAR *str, int len, ME_Style *style)
470 /* FIXME really HERE ? */
471 if (ME_IsSelection(editor))
472 ME_DeleteSelection(editor);
474 /* FIXME: is this too slow? */
475 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
476 oldLen = ME_GetTextLength(editor);
478 /* text operations set modified state */
479 editor->nModifyStep = 1;
483 assert(nCursor>=0 && nCursor<editor->nCursors);
487 /* grow the text limit to fit our text */
488 if(editor->nTextLimit < oldLen +len)
489 editor->nTextLimit = oldLen + len;
494 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
495 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
497 if (pos-str < len && *pos == '\t') { /* handle tabs */
501 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
503 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
512 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
513 if (!editor->bEmulateVersion10 && pos-str < len-2 && pos[0] == '\r' && pos[1] == '\r' && pos[2] == '\n') {
517 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
519 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
528 if (pos-str < len) { /* handle EOLs */
529 ME_DisplayItem *tp, *end_run;
534 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
535 p = &editor->pCursors[nCursor];
537 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
538 p = &editor->pCursors[nCursor];
540 tmp_style = ME_GetInsertStyle(editor, nCursor);
541 /* ME_SplitParagraph increases style refcount */
543 /* Encode and fill number of CR and LF according to emulation mode */
544 if (editor->bEmulateVersion10) {
547 /* We have to find out how many consecutive \r are there, and if there
548 is a \n terminating the run of \r's. */
549 numCR = 0; numLF = 0;
551 while (tpos-str < len && *tpos == '\r') {
555 if (tpos-str >= len) {
556 /* Reached end of text without finding anything but '\r' */
560 numCR = 1; numLF = 0;
561 } else if (*tpos == '\n') {
562 /* The entire run of \r's plus the one \n is one single line break */
566 /* Found some other content past the run of \r's */
568 numCR = 1; numLF = 0;
571 if(pos-str < len && *pos =='\r')
573 if(pos-str < len && *pos =='\n')
575 numCR = 1; numLF = 0;
577 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, numCR, numLF);
578 p->pRun = ME_FindItemFwd(tp, diRun);
579 end_run = ME_FindItemBack(tp, diRun);
580 ME_ReleaseStyle(end_run->member.run.style);
581 end_run->member.run.style = tmp_style;
590 ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
597 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
599 ME_DisplayItem *pRun = pCursor->pRun;
603 if (!pCursor->nOffset)
606 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
613 if (pRun->member.para.prev_para->type == diTextStart)
615 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
616 /* every paragraph ought to have at least one run */
617 assert(pRun && pRun->type == diRun);
618 assert(pRun->member.run.nFlags & MERF_ENDPARA);
621 assert(pRun->type != diRun && pRun->type != diParagraph);
624 } while (RUN_IS_HIDDEN(&pRun->member.run));
625 pCursor->pRun = pRun;
626 if (pRun->member.run.nFlags & MERF_ENDPARA)
627 pCursor->nOffset = 0;
629 pCursor->nOffset = pRun->member.run.strText->nLen;
632 if (pCursor->nOffset)
633 pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
638 if (!(pRun->member.run.nFlags & MERF_ENDPARA))
640 int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
642 if (new_ofs < pRun->member.run.strText->nLen)
644 pCursor->nOffset = new_ofs;
649 pRun = ME_FindItemFwd(pRun, diRun);
650 } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
653 pCursor->pRun = pRun;
654 pCursor->nOffset = 0;
663 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
665 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
666 int nOffset = cursor->nOffset;
670 /* Backward movement */
673 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
674 nOffset, WB_MOVEWORDLEFT);
677 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
678 if (pOtherRun->type == diRun)
680 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
681 pOtherRun->member.run.strText->nLen - 1,
683 && !(pRun->member.run.nFlags & MERF_ENDPARA)
684 && !(cursor->pRun == pRun && cursor->nOffset == 0)
685 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
689 nOffset = pOtherRun->member.run.strText->nLen;
691 else if (pOtherRun->type == diParagraph)
693 if (cursor->pRun == pRun && cursor->nOffset == 0)
695 /* Paragraph breaks are treated as separate words */
696 if (pOtherRun->member.para.prev_para->type == diTextStart)
698 pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
706 /* Forward movement */
707 BOOL last_delim = FALSE;
711 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
712 nOffset, WB_ISDELIMITER))
714 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
715 nOffset, WB_MOVEWORDRIGHT);
716 if (nOffset < pRun->member.run.strText->nLen)
718 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
719 if (pOtherRun->type == diRun)
721 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
722 nOffset - 1, WB_ISDELIMITER);
726 else if (pOtherRun->type == diParagraph)
728 if (cursor->pRun == pRun)
729 pRun = ME_FindItemFwd(pOtherRun, diRun);
735 if (cursor->pRun == pRun)
743 cursor->nOffset = nOffset;
749 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
751 /* pCursor[0] will be the start of the selection
752 * pCursor[1] is the other end of the selection range
753 * pCursor[2] and [3] are the selection anchors that are backed up
754 * so they are kept when the selection changes for drag selection.
757 editor->nSelectionType = selectionType;
758 switch(selectionType)
763 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
764 editor->pCursors[0] = editor->pCursors[1];
765 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
770 ME_DisplayItem *pItem;
771 ME_DIType fwdSearchType, backSearchType;
772 if (selectionType == stParagraph) {
773 backSearchType = diParagraph;
774 fwdSearchType = diParagraphOrEnd;
776 backSearchType = diStartRow;
777 fwdSearchType = diStartRowOrParagraphOrEnd;
779 pItem = ME_FindItemBack(editor->pCursors[0].pRun, backSearchType);
780 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
781 editor->pCursors[0].nOffset = 0;
783 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
785 if (pItem->type == diTextEnd)
786 editor->pCursors[1].pRun = ME_FindItemBack(pItem, diRun);
788 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
789 editor->pCursors[1].nOffset = 0;
793 /* Select everything with cursor anchored from the start of the text */
794 editor->nSelectionType = stDocument;
795 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
796 editor->pCursors[1].nOffset = 0;
797 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
798 editor->pCursors[0].nOffset = 0;
802 /* Store the anchor positions for extending the selection. */
803 editor->pCursors[2] = editor->pCursors[0];
804 editor->pCursors[3] = editor->pCursors[1];
808 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
810 ME_Cursor *pCursor = &editor->pCursors[nCursor];
811 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
812 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
815 /* Finds the run and offset from the pixel position.
817 * x & y are pixel positions in virtual coordinates into the rich edit control,
818 * so client coordinates must first be adjusted by the scroll position.
820 * returns TRUE if the result was exactly under the cursor, otherwise returns
821 * FALSE, and result is set to the closest position to the coordinates.
823 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
824 ME_Cursor *result, BOOL *is_eol)
826 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
827 ME_DisplayItem *last = NULL;
835 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
837 assert(p->type == diParagraph);
838 if (y < p->member.para.nYPos + p->member.para.nHeight)
840 y -= p->member.para.nYPos;
841 p = ME_FindItemFwd(p, diStartRow);
846 for (; p != editor->pBuffer->pLast; )
849 assert(p->type == diStartRow);
850 if (y < p->member.row.nYPos + p->member.row.nHeight)
852 p = ME_FindItemFwd(p, diRun);
855 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
856 if (pp->type != diStartRow)
858 p = ME_FindItemFwd(p, diRun);
863 if (p == editor->pBuffer->pLast)
865 /* The position is below the last paragraph, so the last row will be used
866 * rather than the end of the text, so the x position will be used to
867 * determine the offset closest to the pixel position. */
869 p = ME_FindItemBack(p, diStartRow);
871 p = ME_FindItemFwd(p, diRun);
875 p = editor->pBuffer->pLast;
878 for (; p != editor->pBuffer->pLast; p = p->next)
883 rx = x - p->member.run.pt.x;
884 if (rx < p->member.run.nWidth)
887 assert(p->type == diRun);
888 if ((p->member.run.nFlags & MERF_ENDPARA) || rx < 0)
891 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
892 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
894 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
902 p = ME_FindItemFwd(p, diRun);
903 if (is_eol) *is_eol = 1;
904 rx = 0; /* FIXME not sure */
909 rx = 0; /* FIXME not sure */
916 result->pRun = ME_FindItemBack(p, diRun);
918 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
923 /* Returns the character offset closest to the pixel position
925 * x & y are pixel positions in client coordinates.
927 * isExact will be set to TRUE if the run is directly under the pixel
928 * position, FALSE if it not, unless isExact is set to NULL.
930 int ME_CharFromPos(ME_TextEditor *editor, int x, int y, BOOL *isExact)
936 GetClientRect(editor->hWnd, &rc);
937 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
938 if (isExact) *isExact = FALSE;
941 y += ME_GetYScrollPos(editor);
942 bResult = ME_FindPixelPos(editor, x, y, &cursor, NULL);
943 if (isExact) *isExact = bResult;
944 return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
945 + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
950 /* Extends the selection with a word, line, or paragraph selection type.
952 * The selection is anchored by editor->pCursors[2-3] such that the text
953 * between the anchors will remain selected, and one end will be extended.
955 * editor->pCursors[0] should have the position to extend the selection to
956 * before this function is called.
958 * Nothing will be done if editor->nSelectionType equals stPosition.
960 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
962 ME_Cursor tmp_cursor;
963 int curOfs, anchorStartOfs, anchorEndOfs;
964 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
966 curOfs = ME_GetCursorOfs(editor, 0);
967 anchorStartOfs = ME_GetCursorOfs(editor, 2);
968 anchorEndOfs = ME_GetCursorOfs(editor, 3);
970 tmp_cursor = editor->pCursors[0];
971 editor->pCursors[0] = editor->pCursors[2];
972 editor->pCursors[1] = editor->pCursors[3];
973 if (curOfs < anchorStartOfs)
975 /* Extend the left side of selection */
976 editor->pCursors[0] = tmp_cursor;
977 if (editor->nSelectionType == stWord)
978 ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
981 ME_DisplayItem *pItem;
982 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
983 diStartRowOrParagraph:diParagraph);
984 pItem = ME_FindItemBack(editor->pCursors[0].pRun, searchType);
985 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
986 editor->pCursors[0].nOffset = 0;
989 else if (curOfs >= anchorEndOfs)
991 /* Extend the right side of selection */
992 editor->pCursors[1] = tmp_cursor;
993 if (editor->nSelectionType == stWord)
994 ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
997 ME_DisplayItem *pItem;
998 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
999 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1000 pItem = ME_FindItemFwd(editor->pCursors[1].pRun, searchType);
1001 if (pItem->type == diTextEnd)
1002 editor->pCursors[1].pRun = ME_FindItemBack(pItem, diRun);
1004 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1005 editor->pCursors[1].nOffset = 0;
1010 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1012 ME_Cursor tmp_cursor;
1013 int is_selection = 0;
1016 editor->nUDArrowX = -1;
1018 y += ME_GetYScrollPos(editor);
1020 tmp_cursor = editor->pCursors[0];
1021 is_selection = ME_IsSelection(editor);
1022 is_shift = GetKeyState(VK_SHIFT) < 0;
1024 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1026 if (x >= editor->selofs || is_shift)
1030 editor->pCursors[1] = editor->pCursors[0];
1032 if (x >= editor->selofs)
1033 ME_SelectByType(editor, stWord);
1035 ME_SelectByType(editor, stParagraph);
1036 } else if (clickNum % 2 == 0) {
1037 ME_SelectByType(editor, stWord);
1039 ME_SelectByType(editor, stParagraph);
1044 editor->nSelectionType = stPosition;
1045 editor->pCursors[1] = editor->pCursors[0];
1047 else if (!is_selection)
1049 editor->nSelectionType = stPosition;
1050 editor->pCursors[1] = tmp_cursor;
1052 else if (editor->nSelectionType != stPosition)
1054 ME_ExtendAnchorSelection(editor);
1060 ME_SelectByType(editor, stLine);
1061 } else if (clickNum % 2 == 0 || is_shift) {
1062 ME_SelectByType(editor, stParagraph);
1064 ME_SelectByType(editor, stDocument);
1067 ME_InvalidateSelection(editor);
1068 HideCaret(editor->hWnd);
1069 ME_ShowCaret(editor);
1070 ME_ClearTempStyle(editor);
1071 ME_SendSelChange(editor);
1074 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1076 ME_Cursor tmp_cursor;
1078 if (editor->nSelectionType == stDocument)
1080 y += ME_GetYScrollPos(editor);
1082 tmp_cursor = editor->pCursors[0];
1083 /* FIXME: do something with the return value of ME_FindPixelPos */
1084 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1086 ME_InvalidateSelection(editor);
1087 editor->pCursors[0] = tmp_cursor;
1088 ME_ExtendAnchorSelection(editor);
1090 if (editor->nSelectionType != stPosition &&
1091 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1093 /* The scroll the cursor towards the other end, since it was the one
1094 * extended by ME_ExtendAnchorSelection
1096 ME_Cursor tmpCursor = editor->pCursors[0];
1097 editor->pCursors[0] = editor->pCursors[1];
1098 editor->pCursors[1] = tmpCursor;
1099 SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
1100 editor->pCursors[1] = editor->pCursors[0];
1101 editor->pCursors[0] = tmpCursor;
1103 SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
1106 ME_InvalidateSelection(editor);
1107 HideCaret(editor->hWnd);
1108 ME_ShowCaret(editor);
1109 ME_SendSelChange(editor);
1112 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1113 int x, int *pOffset, int *pbCaretAtEnd)
1115 ME_DisplayItem *pNext, *pLastRun;
1116 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1117 assert(pNext->type == diRun);
1119 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1120 if (pOffset) *pOffset = 0;
1122 int run_x = pNext->member.run.pt.x;
1123 int width = pNext->member.run.nWidth;
1128 if (x >= run_x && x < run_x+width)
1130 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1131 ME_String *s = pNext->member.run.strText;
1139 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1140 } while(pNext && pNext->type == diRun);
1142 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1144 pNext = ME_FindItemFwd(pNext, diRun);
1145 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1152 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1154 ME_DisplayItem *pRun = pCursor->pRun;
1157 if (editor->nUDArrowX != -1)
1158 x = editor->nUDArrowX;
1160 if (editor->bCaretAtEnd)
1162 pRun = ME_FindItemBack(pRun, diRun);
1164 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1167 x = pRun->member.run.pt.x;
1168 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1170 editor->nUDArrowX = x;
1177 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1179 ME_DisplayItem *pRun = pCursor->pRun;
1180 ME_DisplayItem *pItem;
1181 int x = ME_GetXForArrow(editor, pCursor);
1183 if (editor->bCaretAtEnd && !pCursor->nOffset)
1184 pRun = ME_FindItemBack(pRun, diRun);
1189 /* start of this row */
1190 pItem = ME_FindItemBack(pRun, diStartRow);
1192 /* start of the previous row */
1193 pItem = ME_FindItemBack(pItem, diStartRow);
1197 /* start of the next row */
1198 pItem = ME_FindItemFwd(pRun, diStartRow);
1199 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
1204 /* row not found - ignore */
1207 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1208 assert(pCursor->pRun);
1209 assert(pCursor->pRun->type == diRun);
1213 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1215 ME_DisplayItem *pRun = pCursor->pRun;
1216 ME_DisplayItem *pLast, *p;
1217 int x, y, ys, yd, yp, yprev;
1218 ME_Cursor tmp_curs = *pCursor;
1220 x = ME_GetXForArrow(editor, pCursor);
1221 if (!pCursor->nOffset && editor->bCaretAtEnd)
1222 pRun = ME_FindItemBack(pRun, diRun);
1224 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1225 assert(p->type == diStartRow);
1226 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1227 yprev = ys = y = yp + p->member.row.nYPos;
1228 yd = y - editor->sizeWindow.cy;
1232 p = ME_FindItemBack(p, diStartRowOrParagraph);
1235 if (p->type == diParagraph) { /* crossing paragraphs */
1236 if (p->member.para.prev_para == NULL)
1238 yp = p->member.para.prev_para->member.para.nYPos;
1241 y = yp + p->member.row.nYPos;
1248 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1249 ME_UpdateSelection(editor, &tmp_curs);
1250 if (yprev < editor->sizeWindow.cy)
1252 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1257 ME_ScrollUp(editor, ys-yprev);
1259 assert(pCursor->pRun);
1260 assert(pCursor->pRun->type == diRun);
1263 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1264 of pixels, even if it makes the scroll bar position exceed its normal maximum.
1265 In such a situation, clicking the scrollbar restores its position back to the
1266 normal range (ie. sets it to (doclength-screenheight)). */
1268 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1270 ME_DisplayItem *pRun = pCursor->pRun;
1271 ME_DisplayItem *pLast, *p;
1272 int x, y, ys, yd, yp, yprev;
1273 ME_Cursor tmp_curs = *pCursor;
1275 x = ME_GetXForArrow(editor, pCursor);
1276 if (!pCursor->nOffset && editor->bCaretAtEnd)
1277 pRun = ME_FindItemBack(pRun, diRun);
1279 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1280 assert(p->type == diStartRow);
1281 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1282 yprev = ys = y = yp + p->member.row.nYPos;
1283 yd = y + editor->sizeWindow.cy;
1287 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1290 if (p->type == diParagraph) {
1291 yp = p->member.para.nYPos;
1294 y = yp + p->member.row.nYPos;
1301 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1302 ME_UpdateSelection(editor, &tmp_curs);
1303 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1305 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1310 ME_ScrollUp(editor,ys-yprev);
1312 assert(pCursor->pRun);
1313 assert(pCursor->pRun->type == diRun);
1316 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1318 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1319 ME_WrapMarkedParagraphs(editor);
1321 ME_DisplayItem *pRun;
1322 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1323 pRow = ME_FindItemBack(pRow, diStartRow);
1327 pRun = ME_FindItemFwd(pRow, diRun);
1329 pCursor->pRun = pRun;
1330 pCursor->nOffset = 0;
1333 editor->bCaretAtEnd = FALSE;
1336 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1338 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1340 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1342 pCursor->pRun = pRun;
1343 pCursor->nOffset = 0;
1348 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1350 ME_DisplayItem *pRow;
1352 if (editor->bCaretAtEnd && !pCursor->nOffset)
1355 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1357 if (pRow->type == diStartRow) {
1358 /* FIXME WTF was I thinking about here ? */
1359 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1361 pCursor->pRun = pRun;
1362 pCursor->nOffset = 0;
1363 editor->bCaretAtEnd = 1;
1366 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1367 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1368 pCursor->nOffset = 0;
1369 editor->bCaretAtEnd = FALSE;
1372 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1374 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1376 p = ME_FindItemBack(p, diRun);
1378 assert(p->member.run.nFlags & MERF_ENDPARA);
1380 pCursor->nOffset = 0;
1381 editor->bCaretAtEnd = FALSE;
1384 BOOL ME_IsSelection(ME_TextEditor *editor)
1386 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1389 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1391 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1399 BOOL ME_UpdateSelection(ME_TextEditor *editor, const ME_Cursor *pTempCursor)
1401 ME_Cursor old_anchor = editor->pCursors[1];
1403 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1405 /* any selection was present ? if so, it's no more, repaint ! */
1406 editor->pCursors[1] = editor->pCursors[0];
1407 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1414 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1416 editor->pCursors[1] = *pTempCursor;
1425 void ME_DeleteSelection(ME_TextEditor *editor)
1428 ME_GetSelection(editor, &from, &to);
1429 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1432 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1434 return ME_GetInsertStyle(editor, 0);
1437 void ME_SendSelChange(ME_TextEditor *editor)
1441 if (!(editor->nEventMask & ENM_SELCHANGE))
1444 sc.nmhdr.hwndFrom = editor->hWnd;
1445 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1446 sc.nmhdr.code = EN_SELCHANGE;
1447 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1448 sc.seltyp = SEL_EMPTY;
1449 if (sc.chrg.cpMin != sc.chrg.cpMax)
1450 sc.seltyp |= SEL_TEXT;
1451 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1452 sc.seltyp |= SEL_MULTICHAR;
1453 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1454 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1455 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1456 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1457 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1459 ME_ClearTempStyle(editor);
1461 editor->notified_cr = sc.chrg;
1462 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1467 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1470 ME_Cursor *p = &editor->pCursors[nCursor];
1471 ME_Cursor tmp_curs = *p;
1472 BOOL success = FALSE;
1474 ME_CheckCharOffsets(editor);
1477 editor->bCaretAtEnd = 0;
1479 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1481 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1484 editor->bCaretAtEnd = 0;
1486 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1488 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1491 ME_MoveCursorLines(editor, &tmp_curs, -1);
1494 ME_MoveCursorLines(editor, &tmp_curs, +1);
1497 ME_ArrowPageUp(editor, &tmp_curs);
1500 ME_ArrowPageDown(editor, &tmp_curs);
1504 ME_ArrowCtrlHome(editor, &tmp_curs);
1506 ME_ArrowHome(editor, &tmp_curs);
1507 editor->bCaretAtEnd = 0;
1512 ME_ArrowCtrlEnd(editor, &tmp_curs);
1514 ME_ArrowEnd(editor, &tmp_curs);
1519 editor->pCursors[1] = tmp_curs;
1522 ME_InvalidateSelection(editor);
1524 HideCaret(editor->hWnd);
1525 ME_EnsureVisible(editor, tmp_curs.pRun);
1526 ME_ShowCaret(editor);
1527 ME_SendSelChange(editor);