2 * RichEdit - Caret and selection functions.
4 * Copyright 2004 by Krzysztof Foltman
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
26 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
28 *from = ME_GetCursorOfs(editor, 0);
29 *to = ME_GetCursorOfs(editor, 1);
39 int ME_GetTextLength(ME_TextEditor *editor)
41 return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0);
45 int ME_GetTextLengthEx(ME_TextEditor *editor, GETTEXTLENGTHEX *how)
49 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
51 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
54 length = ME_GetTextLength(editor);
56 if (how->flags & GTL_USECRLF)
57 length += editor->nParagraphs;
59 if (how->flags & GTL_NUMBYTES)
63 if (how->codepage == 1200)
65 if (how->flags & GTL_PRECISE)
66 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
67 if (GetCPInfo(how->codepage, &cpinfo))
68 return length * cpinfo.MaxCharSize;
69 ERR("Invalid codepage %u\n", how->codepage);
76 void ME_SetSelection(ME_TextEditor *editor, int from, int to)
78 if (from == 0 && to == -1)
80 editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
81 editor->pCursors[1].nOffset = 0;
82 editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
83 editor->pCursors[0].nOffset = 0;
85 ME_ClearTempStyle(editor);
90 editor->pCursors[1] = editor->pCursors[0];
92 ME_ClearTempStyle(editor);
101 ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
102 ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
105 void ME_MoveCaret(ME_TextEditor *editor)
107 HDC hDC = GetDC(editor->hWnd);
110 ME_Cursor *pCursor = &editor->pCursors[0];
111 ME_DisplayItem *pCursorRun = pCursor->pRun;
112 ME_DisplayItem *pSizeRun = pCursor->pRun;
114 ME_InitContext(&c, editor, hDC);
115 assert(!pCursor->nOffset || !editor->bCaretAtEnd);
117 if (pCursorRun->type == diRun) {
118 ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
120 ME_DisplayItem *run = pCursorRun;
121 ME_DisplayItem *para;
123 if (!pCursor->nOffset && !editor->bCaretAtEnd)
125 ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow);
126 if (prev->type == diRun)
129 assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
130 para = ME_FindItemBack(row, diParagraph);
131 if (editor->bCaretAtEnd && !pCursor->nOffset &&
132 run == ME_FindItemFwd(row, diRun))
134 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
135 if (tmp->type == diRun)
137 row = ME_FindItemBack(tmp, diStartRow);
138 pSizeRun = run = tmp;
139 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, ME_StrLen(run->member.run.strText));
142 if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) {
143 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset);
145 CreateCaret(editor->hWnd, NULL, 0, pSizeRun->member.run.nAscent+pSizeRun->member.run.nDescent);
146 SetCaretPos(run->member.run.pt.x+sz.cx,
147 para->member.para.nYPos+row->member.row.nBaseline+pSizeRun->member.run.pt.y-pSizeRun->member.run.nAscent-ME_GetYScrollPos(editor));
149 assert(0 == "Wrapped paragraph run without a row?");
150 CreateCaret(editor->hWnd, NULL, 0, 10);
155 assert(0 == "Cursor not on a run");
156 CreateCaret(editor->hWnd, NULL, 0, 10); /* FIXME use global font */
159 ME_DestroyContext(&c);
160 ReleaseDC(editor->hWnd, hDC);
163 void ME_ShowCaret(ME_TextEditor *ed)
169 void ME_HideCaret(ME_TextEditor *ed)
175 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
184 ME_CursorFromCharOfs(editor, nOfs, &c);
185 run = &c.pRun->member.run;
186 if (run->nFlags & MERF_ENDPARA) {
187 if (!ME_FindItemFwd(c.pRun, diParagraph))
191 ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
192 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
193 ME_CheckCharOffsets(editor);
200 int nIntendedChars = nChars;
201 int nCharsToDelete = nChars;
205 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
208 ME_StrRelPos(run->strText, loc, &nChars);
209 /* nChars is the number of characters that should be deleted from the
210 FOLLOWING runs (these AFTER cursor.pRun)
211 nCharsToDelete is a number of chars to delete from THIS run */
212 nCharsToDelete -= nChars;
213 shift -= nCharsToDelete;
214 TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
215 nCharsToDelete, nIntendedChars, nChars, c.nOffset,
216 debugstr_w(run->strText->szData), run->strText->nLen);
218 if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
220 /* undo = reinsert whole run */
221 /* nOfs is a character offset (from the start of the document
222 to the current (deleted) run */
223 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
225 pUndo->di.member.run.nCharOfs = nOfs;
229 /* undo = reinsert partial run */
230 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
232 ME_DestroyString(pUndo->di.member.run.strText);
233 pUndo->di.member.run.nCharOfs = nOfs;
234 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
237 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
238 TRACE("Shift value: %d\n", shift);
239 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
241 /* update cursors (including c) */
242 for (i=-1; i<editor->nCursors; i++) {
243 ME_Cursor *pThisCur = editor->pCursors + i;
244 if (i == -1) pThisCur = &c;
245 if (pThisCur->pRun == cursor.pRun) {
246 if (pThisCur->nOffset > cursor.nOffset) {
247 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
248 pThisCur->nOffset = cursor.nOffset;
250 pThisCur->nOffset -= nCharsToDelete;
251 assert(pThisCur->nOffset >= 0);
252 assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
254 if (pThisCur->nOffset == ME_StrVLen(run->strText))
256 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
257 assert(pThisCur->pRun->type == diRun);
258 pThisCur->nOffset = 0;
263 /* c = updated data now */
265 if (c.pRun == cursor.pRun)
266 ME_SkipAndPropagateCharOffset(c.pRun, shift);
268 ME_PropagateCharOffset(c.pRun, shift);
270 if (!ME_StrVLen(cursor.pRun->member.run.strText))
272 TRACE("Removing useless run\n");
273 ME_Remove(cursor.pRun);
274 ME_DestroyDisplayItem(cursor.pRun);
279 ME_CheckCharOffsets(editor);
286 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
289 assert(nCursor>=0 && nCursor<editor->nCursors);
290 ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
293 static WCHAR wszSpace[] = {' ', 0};
295 /* FIXME this is temporary, just to have something to test how bad graphics handler is */
296 void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
298 ME_Cursor *pCursor = &editor->pCursors[nCursor];
299 ME_DisplayItem *pItem = NULL;
300 ME_DisplayItem *pNewRun = NULL;
301 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
305 if (ME_IsSelection(editor))
306 ME_DeleteSelection(editor);
308 pUndo = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
310 pUndo->nStart = pCursor->nOffset + pCursor->pRun->member.run.nCharOfs + ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs;
313 if (pCursor->nOffset)
315 ME_SplitRunSimple(editor, pCursor->pRun, pCursor->nOffset);
317 pItem = pCursor->pRun;
318 pNewRun = ME_MakeRun(pStyle, ME_MakeStringN(wszSpace, 1), MERF_GRAPHICS);
319 pNewRun->member.run.nCharOfs = pCursor->pRun->member.run.nCharOfs;
320 ME_InsertBefore(pCursor->pRun, pNewRun);
321 ME_PropagateCharOffset(pItem, 1);
322 ME_CheckCharOffsets(editor);
323 ME_SendSelChange(editor);
326 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
327 const WCHAR *str, int len, ME_Style *style)
333 editor->bCaretAtEnd = FALSE;
335 ME_AddRefStyle(style);
337 /* FIXME really HERE ? */
338 if (ME_IsSelection(editor))
339 ME_DeleteSelection(editor);
341 assert(nCursor>=0 && nCursor<editor->nCursors);
345 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
346 while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
348 if (pos-str < len && *pos == '\t') { /* handle tabs */
349 ME_DisplayItem *pNewRun = NULL;
353 ME_InsertTextFromCursor(editor, nCursor, str, pos-str, style);
355 p = &editor->pCursors[nCursor];
357 assert(p->pRun->type == diRun);
358 pNewRun = ME_MakeRun(style, ME_MakeStringN(&tab, 1), MERF_TAB); /* addrefs style */
359 ME_InsertRun(editor, ME_CharOfsFromRunOfs(editor, p->pRun, p->nOffset), pNewRun);
360 ME_DestroyDisplayItem(pNewRun);
361 ME_ReleaseStyle(style);
365 ME_InsertTextFromCursor(editor, nCursor, pos, len-(pos-str), style);
369 if (pos-str < len) { /* handle EOLs */
370 ME_DisplayItem *tp, *end_run;
374 ME_InsertTextFromCursor(editor, nCursor, str, pos-str, style);
375 p = &editor->pCursors[nCursor];
376 tp = ME_FindItemBack(p->pRun, diParagraph);
377 para = &tp->member.para;
380 ME_SplitRunSimple(editor, p->pRun, p->nOffset);
381 p = &editor->pCursors[nCursor];
383 tmp_style = ME_GetInsertStyle(editor, nCursor);
384 /* ME_SplitParagraph increases style refcount */
385 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
386 p->pRun = ME_FindItemFwd(tp, diRun);
387 end_run = ME_FindItemBack(tp, diRun);
388 ME_ReleaseStyle(end_run->member.run.style);
389 end_run->member.run.style = tmp_style;
391 if(pos-str < len && *pos =='\r')
393 if(pos-str < len && *pos =='\n')
396 ME_InsertTextFromCursor(editor, nCursor, pos, len-(pos-str), style);
398 ME_ReleaseStyle(style);
401 p = &editor->pCursors[nCursor];
403 ME_DisplayItem *pNewRun = NULL;
405 assert(p->pRun->type == diRun);
406 pNewRun = ME_MakeRun(style, ME_MakeStringN(str, len), 0); /* addrefs style */
407 ME_InsertRun(editor, ME_CharOfsFromRunOfs(editor, p->pRun, p->nOffset), pNewRun);
408 ME_DestroyDisplayItem(pNewRun);
409 ME_ReleaseStyle(style);
416 static BOOL ME_ArrowLeft(ME_TextEditor *editor, ME_Cursor *p)
419 p->nOffset = ME_StrRelPos2(p->pRun->member.run.strText, p->nOffset, -1);
424 ME_DisplayItem *pRun = ME_FindItemBack(p->pRun, diRunOrParagraph);
426 if (pRun->type == diRun) {
428 assert(p->pRun->type == diRun);
429 assert(pRun->member.run.strText->nLen);
430 p->nOffset = pRun->member.run.strText->nLen;
432 p->nOffset = ME_StrRelPos2(pRun->member.run.strText, p->nOffset, -1);
438 if (pRun->type == diParagraph)
440 if (pRun->member.para.prev_para->type == diTextStart)
442 assert(pRun->member.para.prev_para->type == diParagraph);
443 pRun = ME_FindItemBack(pRun, diRunOrParagraph);
444 /* every paragraph ought to have at least one run */
445 assert(pRun && pRun->type == diRun);
446 assert(pRun->member.run.nFlags & MERF_ENDPARA);
456 static BOOL ME_ArrowRight(ME_TextEditor *editor, ME_Cursor *p)
458 int new_ofs = ME_StrRelPos2(p->pRun->member.run.strText, p->nOffset, 1);
459 if (new_ofs<p->pRun->member.run.strText->nLen) {
460 p->nOffset = new_ofs;
464 ME_DisplayItem *pRun = ME_FindItemFwd(p->pRun, diRun);
467 assert(p->pRun->type == diRun);
474 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
476 ME_Cursor *pCursor = &editor->pCursors[nCursor];
478 return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
479 + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
482 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
484 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
490 while(p != editor->pBuffer->pLast)
492 if (p->type == diParagraph)
494 int ry = y - p->member.para.nYPos;
497 result->pRun = ME_FindItemFwd(p, diRun);
501 if (ry >= p->member.para.nHeight)
503 p = p->member.para.next_para;
506 p = ME_FindItemFwd(p, diStartRow);
510 if (p->type == diStartRow)
512 int ry = y - p->member.row.nYPos;
515 if (ry >= p->member.row.nHeight)
517 p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
518 if (p->type != diStartRow)
522 p = ME_FindItemFwd(p, diRun);
525 if (p->type == diRun)
528 rx = x - p->member.run.pt.x;
531 if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
536 if (p->type == diRun)
538 rx = x - p->member.run.pt.x;
539 goto continue_search;
541 if (p->type == diStartRow)
543 p = ME_FindItemFwd(p, diRun);
546 rx = 0; /* FIXME not sure */
549 if (p->type == diParagraph || p->type == diTextEnd)
551 rx = 0; /* FIXME not sure */
559 if (p->member.run.nFlags & MERF_ENDPARA)
562 result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
563 if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
565 result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
574 result->pRun = ME_FindItemBack(p, diRun);
576 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
580 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
582 ME_Cursor tmp_cursor;
583 int is_selection = 0;
585 editor->nUDArrowX = -1;
587 y += ME_GetYScrollPos(editor);
589 tmp_cursor = editor->pCursors[0];
590 is_selection = ME_IsSelection(editor);
592 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
594 if (GetKeyState(VK_SHIFT)>=0)
596 editor->pCursors[1] = editor->pCursors[0];
601 editor->pCursors[1] = tmp_cursor;
605 HideCaret(editor->hWnd);
606 ME_MoveCaret(editor);
609 ShowCaret(editor->hWnd);
610 ME_ClearTempStyle(editor);
611 ME_SendSelChange(editor);
614 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
616 ME_Cursor tmp_cursor;
618 y += ME_GetYScrollPos(editor);
620 tmp_cursor = editor->pCursors[0];
621 if (!ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd))
624 if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
625 tmp_cursor.nOffset == editor->pCursors[0].nOffset)
628 HideCaret(editor->hWnd);
629 ME_MoveCaret(editor);
631 ShowCaret(editor->hWnd);
632 ME_SendSelChange(editor);
635 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
636 int x, int *pOffset, int *pbCaretAtEnd)
638 ME_DisplayItem *pNext, *pLastRun;
639 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
640 assert(pNext->type == diRun);
642 *pbCaretAtEnd = FALSE;
644 int run_x = pNext->member.run.pt.x;
645 int width = pNext->member.run.nWidth;
648 if (pOffset) *pOffset = 0;
651 if (x >= run_x && x < run_x+width)
653 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
654 ME_String *s = pNext->member.run.strText;
662 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
663 } while(pNext && pNext->type == diRun);
665 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
667 pNext = ME_FindItemFwd(pNext, diRun);
668 if (pbCaretAtEnd) *pbCaretAtEnd = 1;
669 if (pOffset) *pOffset = 0;
672 if (pbCaretAtEnd) *pbCaretAtEnd = 0;
673 if (pOffset) *pOffset = 0;
678 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
680 ME_DisplayItem *pRun = pCursor->pRun;
683 if (editor->nUDArrowX != -1)
684 x = editor->nUDArrowX;
686 if (editor->bCaretAtEnd)
688 pRun = ME_FindItemBack(pRun, diRun);
690 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
693 x = pRun->member.run.pt.x;
694 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
696 editor->nUDArrowX = x;
701 static void ME_ArrowUp(ME_TextEditor *editor, ME_Cursor *pCursor)
703 ME_DisplayItem *pRun = pCursor->pRun;
704 ME_DisplayItem *pItem, *pItem2;
705 int x = ME_GetXForArrow(editor, pCursor);
707 if (editor->bCaretAtEnd && !pCursor->nOffset)
709 pRun = ME_FindItemBack(pRun, diRun);
714 /* start of this row */
715 pItem = ME_FindItemBack(pRun, diStartRow);
717 /* start of the previous row */
718 pItem2 = ME_FindItemBack(pItem, diStartRow);
719 /* no previous row = the first line of the first paragraph */
720 if (!pItem2) /* can't go up - don't go BOL (as in MS richedit) */
723 ME_WrapTextParagraph(editor, ME_FindItemBack(pItem2, diParagraph));
725 pCursor->pRun = ME_FindRunInRow(editor, pItem2, x, &pCursor->nOffset, &editor->bCaretAtEnd);
728 static void ME_ArrowDown(ME_TextEditor *editor, ME_Cursor *pCursor)
730 ME_DisplayItem *pRun = pCursor->pRun;
731 ME_DisplayItem *pItem;
732 int x = ME_GetXForArrow(editor, pCursor);
733 if (!pCursor->nOffset && editor->bCaretAtEnd)
735 pRun = ME_FindItemBack(pRun, diRun);
736 /* x = pRun->member.run.pt.x + pRun->member.run.nWidth; */
738 /* start of the next row */
739 pItem = ME_FindItemFwd(pRun, diStartRow);
740 /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
744 /* next row not found - ignore */
747 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
748 assert(pCursor->pRun);
749 assert(pCursor->pRun->type == diRun);
752 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
754 ME_DisplayItem *pRun = pCursor->pRun;
755 ME_DisplayItem *pLast, *p;
756 int x, y, ys, yd, yp, yprev;
757 ME_Cursor tmp_curs = *pCursor;
759 x = ME_GetXForArrow(editor, pCursor);
760 if (!pCursor->nOffset && editor->bCaretAtEnd)
761 pRun = ME_FindItemBack(pRun, diRun);
763 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
764 assert(p->type == diStartRow);
765 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
766 yprev = ys = y = yp + p->member.row.nYPos;
767 yd = y - editor->sizeWindow.cy;
771 p = ME_FindItemBack(p, diStartRowOrParagraph);
774 if (p->type == diParagraph) { /* crossing paragraphs */
775 if (p->member.para.prev_para == NULL)
777 yp = p->member.para.prev_para->member.para.nYPos;
780 y = yp + p->member.row.nYPos;
787 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
788 ME_UpdateSelection(editor, &tmp_curs);
789 if (yprev < editor->sizeWindow.cy)
791 ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
795 ME_Scroll(editor, 0, ys-yprev);
798 assert(pCursor->pRun);
799 assert(pCursor->pRun->type == diRun);
802 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
803 of pixels, even if it makes the scroll bar position exceed its normal maximum.
804 In such a situation, clicking the scrollbar restores its position back to the
805 normal range (ie. sets it to (doclength-screenheight)). */
807 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
809 ME_DisplayItem *pRun = pCursor->pRun;
810 ME_DisplayItem *pLast, *p;
811 int x, y, ys, yd, yp, yprev;
812 ME_Cursor tmp_curs = *pCursor;
814 x = ME_GetXForArrow(editor, pCursor);
815 if (!pCursor->nOffset && editor->bCaretAtEnd)
816 pRun = ME_FindItemBack(pRun, diRun);
818 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
819 assert(p->type == diStartRow);
820 yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
821 yprev = ys = y = yp + p->member.row.nYPos;
822 yd = y + editor->sizeWindow.cy;
826 p = ME_FindItemFwd(p, diStartRowOrParagraph);
829 if (p->type == diParagraph) {
830 yp = p->member.para.nYPos;
833 y = yp + p->member.row.nYPos;
840 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
841 ME_UpdateSelection(editor, &tmp_curs);
842 if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
844 ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
848 ME_Scroll(editor, 0, ys-yprev);
851 assert(pCursor->pRun);
852 assert(pCursor->pRun->type == diRun);
855 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
857 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
859 ME_DisplayItem *pRun;
860 if (editor->bCaretAtEnd && !pCursor->nOffset) {
861 pRow = ME_FindItemBack(pRow, diStartRow);
865 pRun = ME_FindItemFwd(pRow, diRun);
867 pCursor->pRun = pRun;
868 pCursor->nOffset = 0;
871 editor->bCaretAtEnd = FALSE;
874 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
876 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
878 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
880 pCursor->pRun = pRun;
881 pCursor->nOffset = 0;
886 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
888 ME_DisplayItem *pRow;
890 if (editor->bCaretAtEnd && !pCursor->nOffset)
893 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
895 if (pRow->type == diStartRow) {
896 /* FIXME WTF was I thinking about here ? */
897 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
899 pCursor->pRun = pRun;
900 pCursor->nOffset = 0;
901 editor->bCaretAtEnd = 1;
904 pCursor->pRun = ME_FindItemBack(pRow, diRun);
905 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
906 pCursor->nOffset = 0;
907 editor->bCaretAtEnd = FALSE;
910 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
912 ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
914 p = ME_FindItemBack(p, diRun);
916 assert(p->member.run.nFlags & MERF_ENDPARA);
918 pCursor->nOffset = 0;
919 editor->bCaretAtEnd = FALSE;
922 BOOL ME_IsSelection(ME_TextEditor *editor)
924 return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
927 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
929 int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
937 static BOOL ME_CancelSelection(ME_TextEditor *editor, int dir)
941 if (GetKeyState(VK_SHIFT)<0)
943 if (!memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor)))
946 cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
949 editor->pCursors[1] = editor->pCursors[0];
951 editor->pCursors[0] = editor->pCursors[1];
956 BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
958 ME_Cursor old_anchor = editor->pCursors[1];
960 if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
962 /* any selection was present ? if so, it's no more, repaint ! */
963 editor->pCursors[1] = editor->pCursors[0];
964 if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
971 if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
973 editor->pCursors[1] = *pTempCursor;
982 static void ME_RepaintSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
984 if (ME_UpdateSelection(editor, pTempCursor)) {
985 ME_EnsureVisible(editor, editor->pCursors[0].pRun);
990 void ME_DeleteSelection(ME_TextEditor *editor)
993 ME_GetSelection(editor, &from, &to);
994 ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
997 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1003 ME_GetSelection(editor, &from, &to);
1004 ME_CursorFromCharOfs(editor, from, &c);
1006 style = c.pRun->member.run.style;
1007 ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1010 style = ME_GetInsertStyle(editor, 0);
1014 void ME_SendSelChange(ME_TextEditor *editor)
1017 if (!(editor->nEventMask & ENM_SELCHANGE))
1019 sc.nmhdr.hwndFrom = editor->hWnd;
1020 sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1021 sc.nmhdr.code = EN_SELCHANGE;
1022 SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1023 sc.seltyp = SEL_EMPTY;
1024 if (sc.chrg.cpMin != sc.chrg.cpMax)
1025 sc.seltyp |= SEL_TEXT;
1026 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1027 sc.seltyp |= SEL_MULTICHAR;
1028 SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1031 BOOL ME_ArrowKey(ME_TextEditor *editor, int nVKey, int nCtrl)
1034 ME_Cursor *p = &editor->pCursors[nCursor];
1035 ME_Cursor tmp_curs = *p;
1039 ME_ArrowUp(editor, p);
1040 ME_ClearTempStyle(editor);
1041 ME_RepaintSelection(editor, &tmp_curs);
1042 ME_SendSelChange(editor);
1045 ME_ArrowDown(editor, p);
1046 ME_ClearTempStyle(editor);
1047 ME_RepaintSelection(editor, &tmp_curs);
1048 ME_SendSelChange(editor);
1051 ME_ArrowPageUp(editor, p);
1052 ME_ClearTempStyle(editor);
1053 ME_SendSelChange(editor);
1056 ME_ArrowPageDown(editor, p);
1057 ME_ClearTempStyle(editor);
1058 ME_SendSelChange(editor);
1062 editor->nUDArrowX = -1;
1064 case VK_BACK: { /* FIXME backspace and delete aren't the same, they act different wrt paragraph style of the merged paragraph */
1065 if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY)
1067 if (ME_IsSelection(editor))
1069 editor->bCaretAtEnd = FALSE; /* FIXME or maybe not */
1070 ME_DeleteSelection(editor);
1071 ME_UpdateRepaint(editor);
1074 if (ME_ArrowLeft(editor, p)) {
1075 editor->bCaretAtEnd = FALSE; /* FIXME or maybe not */
1076 ME_ClearTempStyle(editor);
1077 ME_MoveCaret(editor);
1078 ME_DeleteTextAtCursor(editor, nCursor, 1);
1079 ME_UpdateRepaint(editor);
1084 if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY)
1086 /* editor->bCaretAtEnd = 0; FIXME or maybe not */
1087 if (ME_IsSelection(editor))
1089 ME_DeleteSelection(editor);
1090 ME_ClearTempStyle(editor);
1091 ME_UpdateRepaint(editor);
1094 ME_DeleteTextAtCursor(editor, nCursor, 1);
1095 ME_ClearTempStyle(editor);
1096 ME_UpdateRepaint(editor);
1100 if (GetKeyState(VK_CONTROL)<0)
1101 ME_ArrowCtrlHome(editor, p);
1103 ME_ArrowHome(editor, p);
1104 editor->bCaretAtEnd = 0;
1105 ME_ClearTempStyle(editor);
1106 ME_RepaintSelection(editor, &tmp_curs);
1107 ME_SendSelChange(editor);
1111 if (GetKeyState(VK_CONTROL)<0)
1112 ME_ArrowCtrlEnd(editor, p);
1114 ME_ArrowEnd(editor, p);
1115 ME_ClearTempStyle(editor);
1116 ME_RepaintSelection(editor, &tmp_curs);
1117 ME_SendSelChange(editor);
1120 editor->bCaretAtEnd = 0;
1121 if (ME_CancelSelection(editor, -1))
1123 ME_ArrowLeft(editor, p);
1124 ME_RepaintSelection(editor, &tmp_curs);
1125 ME_ClearTempStyle(editor);
1126 ME_SendSelChange(editor);
1129 editor->bCaretAtEnd = 0;
1130 if (ME_CancelSelection(editor, +1))
1132 ME_ArrowRight(editor, p);
1133 ME_RepaintSelection(editor, &tmp_curs);
1134 ME_ClearTempStyle(editor);
1135 ME_SendSelChange(editor);