/* * RichEdit - Caret and selection functions. * * Copyright 2004 by Krzysztof Foltman * Copyright 2005 by Phil Krylov * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "editor.h" WINE_DEFAULT_DEBUG_CHANNEL(richedit); void ME_SetCursorToStart(ME_TextEditor *editor, ME_Cursor *cursor) { cursor->pPara = editor->pBuffer->pFirst->member.para.next_para; cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun); cursor->nOffset = 0; } static void ME_SetCursorToEnd(ME_TextEditor *editor, ME_Cursor *cursor) { cursor->pPara = editor->pBuffer->pLast->member.para.prev_para; cursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun); cursor->nOffset = 0; } int ME_GetSelectionOfs(ME_TextEditor *editor, int *from, int *to) { *from = ME_GetCursorOfs(&editor->pCursors[0]); *to = ME_GetCursorOfs(&editor->pCursors[1]); if (*from > *to) { int tmp = *from; *from = *to; *to = tmp; return 1; } return 0; } int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to) { if (ME_GetCursorOfs(&editor->pCursors[0]) < ME_GetCursorOfs(&editor->pCursors[1])) { *from = &editor->pCursors[0]; *to = &editor->pCursors[1]; return 0; } else { *from = &editor->pCursors[1]; *to = &editor->pCursors[0]; return 1; } } int ME_GetTextLength(ME_TextEditor *editor) { ME_Cursor cursor; ME_SetCursorToEnd(editor, &cursor); return ME_GetCursorOfs(&cursor); } int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how) { int length; if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE) return E_INVALIDARG; if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES) return E_INVALIDARG; length = ME_GetTextLength(editor); if ((editor->styleFlags & ES_MULTILINE) && (how->flags & GTL_USECRLF) && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */ length += editor->nParagraphs - 1; if (how->flags & GTL_NUMBYTES || (how->flags & GTL_PRECISE && /* GTL_PRECISE seems to imply GTL_NUMBYTES */ !(how->flags & GTL_NUMCHARS))) /* unless GTL_NUMCHARS is given */ { CPINFO cpinfo; if (how->codepage == 1200) return length * 2; if (how->flags & GTL_PRECISE) FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n"); if (GetCPInfo(how->codepage, &cpinfo)) return length * cpinfo.MaxCharSize; ERR("Invalid codepage %u\n", how->codepage); return E_INVALIDARG; } return length; } int ME_SetSelection(ME_TextEditor *editor, int from, int to) { int selectionEnd = 0; const int len = ME_GetTextLength(editor); /* all negative values are effectively the same */ if (from < 0) from = -1; if (to < 0) to = -1; /* select all */ if (from == 0 && to == -1) { ME_SetCursorToStart(editor, &editor->pCursors[1]); ME_SetCursorToEnd(editor, &editor->pCursors[0]); ME_InvalidateSelection(editor); ME_ClearTempStyle(editor); return len + 1; } /* if both values are equal and also out of bound, that means to */ /* put the selection at the end of the text */ if ((from == to) && (to < 0 || to > len)) { selectionEnd = 1; } else { /* if from is negative and to is positive then selection is */ /* deselected and caret moved to end of the current selection */ if (from < 0) { int start, end; ME_GetSelectionOfs(editor, &start, &end); editor->pCursors[1] = editor->pCursors[0]; ME_Repaint(editor); ME_ClearTempStyle(editor); return end; } /* adjust to if it's a negative value */ if (to < 0) to = len + 1; /* flip from and to if they are reversed */ if (from>to) { int tmp = from; from = to; to = tmp; } /* after fiddling with the values, we find from > len && to > len */ if (from > len) selectionEnd = 1; /* special case with to too big */ else if (to > len) to = len + 1; } if (selectionEnd) { ME_SetCursorToEnd(editor, &editor->pCursors[0]); editor->pCursors[1] = editor->pCursors[0]; ME_InvalidateSelection(editor); ME_ClearTempStyle(editor); return len; } ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]); editor->pCursors[0] = editor->pCursors[1]; ME_MoveCursorChars(editor, &editor->pCursors[0], to - from); /* Selection is not allowed in the middle of an end paragraph run. */ if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA) editor->pCursors[1].nOffset = 0; if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA) editor->pCursors[0].nOffset = 0; return to; } static void ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor, int *x, int *y, int *height) { ME_DisplayItem *row; ME_DisplayItem *run = pCursor->pRun; ME_DisplayItem *para = pCursor->pPara; ME_DisplayItem *pSizeRun = run; ME_Context c; SIZE sz = {0, 0}; assert(height && x && y); assert(~para->member.para.nFlags & MEPF_REWRAP); assert(run && run->type == diRun); assert(para && para->type == diParagraph); row = ME_FindItemBack(run, diStartRowOrParagraph); assert(row && row->type == diStartRow); ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost)); if (!pCursor->nOffset) { ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph); assert(prev); if (prev->type == diRun) pSizeRun = prev; } if (editor->bCaretAtEnd && !pCursor->nOffset && run == ME_FindItemFwd(row, diRun)) { ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph); assert(tmp); if (tmp->type == diRun) { row = ME_FindItemBack(tmp, diStartRow); pSizeRun = run = tmp; assert(run); assert(run->type == diRun); sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, run->member.run.strText->nLen, row->member.row.nLMargin); } } if (pCursor->nOffset) { sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset, row->member.row.nLMargin); } *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent; *x = c.rcView.left + run->member.run.pt.x + sz.cx - editor->horz_si.nPos; *y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline + run->member.run.pt.y - pSizeRun->member.run.nAscent - editor->vert_si.nPos; ME_DestroyContext(&c); return; } void ME_MoveCaret(ME_TextEditor *editor) { int x, y, height; ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height); if(editor->bHaveFocus && !ME_IsSelection(editor)) { x = min(x, editor->rcFormat.right-1); ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height); ITextHost_TxSetCaretPos(editor->texthost, x, y); } } void ME_ShowCaret(ME_TextEditor *ed) { ME_MoveCaret(ed); if(ed->bHaveFocus && !ME_IsSelection(ed)) ITextHost_TxShowCaret(ed->texthost, TRUE); } void ME_HideCaret(ME_TextEditor *ed) { if(!ed->bHaveFocus || ME_IsSelection(ed)) { ITextHost_TxShowCaret(ed->texthost, FALSE); DestroyCaret(); } } BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start, int nChars, BOOL bForce) { ME_Cursor c = *start; int nOfs = ME_GetCursorOfs(start); int shift = 0; int totalChars = nChars; ME_DisplayItem *start_para; /* Prevent deletion past last end of paragraph run. */ nChars = min(nChars, ME_GetTextLength(editor) - nOfs); start_para = c.pPara; if (!bForce) { ME_ProtectPartialTableDeletion(editor, &c, &nChars); if (nChars == 0) return FALSE; } while(nChars > 0) { ME_Run *run; ME_CursorFromCharOfs(editor, nOfs+nChars, &c); if (!c.nOffset && nOfs+nChars == (c.pRun->member.run.nCharOfs + c.pPara->member.para.nCharOfs)) { /* We aren't deleting anything in this run, so we will go back to the * last run we are deleting text in. */ ME_PrevRun(&c.pPara, &c.pRun); c.nOffset = c.pRun->member.run.strText->nLen; } run = &c.pRun->member.run; if (run->nFlags & MERF_ENDPARA) { int eollen = c.pRun->member.run.strText->nLen; BOOL keepFirstParaFormat; if (!ME_FindItemFwd(c.pRun, diParagraph)) { return TRUE; } keepFirstParaFormat = (totalChars == nChars && nChars <= eollen && run->nCharOfs); if (!editor->bEmulateVersion10) /* v4.1 */ { ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd); ME_DisplayItem *this_para = next_para->member.para.prev_para; /* The end of paragraph before a table row is only deleted if there * is nothing else on the line before it. */ if (this_para == start_para && next_para->member.para.nFlags & MEPF_ROWSTART) { /* If the paragraph will be empty, then it should be deleted, however * it still might have text right now which would inherit the * MEPF_STARTROW property if we joined it right now. * Instead we will delete it after the preceding text is deleted. */ if (nOfs > this_para->member.para.nCharOfs) { /* Skip this end of line. */ nChars -= (eollen < nChars) ? eollen : nChars; continue; } keepFirstParaFormat = TRUE; } } ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat); /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */ ME_CheckCharOffsets(editor); nChars -= (eollen < nChars) ? eollen : nChars; continue; } else { ME_Cursor cursor; int nCharsToDelete = min(nChars, c.nOffset); int i; c.nOffset -= nCharsToDelete; ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP; cursor = c; /* nChars is the number of characters that should be deleted from the PRECEDING runs (these BEFORE cursor.pRun) nCharsToDelete is a number of chars to delete from THIS run */ nChars -= nCharsToDelete; shift -= nCharsToDelete; TRACE("Deleting %d (remaning %d) chars at %d in '%s' (%d)\n", nCharsToDelete, nChars, c.nOffset, debugstr_w(run->strText->szData), run->strText->nLen); if (!c.nOffset && run->strText->nLen == nCharsToDelete) { /* undo = reinsert whole run */ /* nOfs is a character offset (from the start of the document to the current (deleted) run */ ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun); if (pUndo) pUndo->di.member.run.nCharOfs = nOfs+nChars; } else { /* undo = reinsert partial run */ ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun); if (pUndo) { ME_DestroyString(pUndo->di.member.run.strText); pUndo->di.member.run.nCharOfs = nOfs+nChars; pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete); } } TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen); TRACE("Shift value: %d\n", shift); ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete); /* update cursors (including c) */ for (i=-1; i<editor->nCursors; i++) { ME_Cursor *pThisCur = editor->pCursors + i; if (i == -1) pThisCur = &c; if (pThisCur->pRun == cursor.pRun) { if (pThisCur->nOffset > cursor.nOffset) { if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete) pThisCur->nOffset = cursor.nOffset; else pThisCur->nOffset -= nCharsToDelete; assert(pThisCur->nOffset >= 0); assert(pThisCur->nOffset <= run->strText->nLen); } if (pThisCur->nOffset == run->strText->nLen) { pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd); assert(pThisCur->pRun->type == diRun); pThisCur->nOffset = 0; } } } /* c = updated data now */ if (c.pRun == cursor.pRun) ME_SkipAndPropagateCharOffset(c.pRun, shift); else ME_PropagateCharOffset(c.pRun, shift); if (!cursor.pRun->member.run.strText->nLen) { TRACE("Removing useless run\n"); ME_Remove(cursor.pRun); ME_DestroyDisplayItem(cursor.pRun); } shift = 0; /* ME_CheckCharOffsets(editor); */ continue; } } return TRUE; } BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars) { assert(nCursor>=0 && nCursor<editor->nCursors); /* text operations set modified state */ editor->nModifyStep = 1; return ME_InternalDeleteText(editor, &editor->pCursors[nCursor], nChars, FALSE); } static ME_DisplayItem * ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor, const WCHAR *str, int len, ME_Style *style, int flags) { ME_Cursor *p = &editor->pCursors[nCursor]; editor->bCaretAtEnd = FALSE; assert(p->pRun->type == diRun); return ME_InsertRunAtCursor(editor, p, style, str, len, flags); } void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor) { ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor); ME_DisplayItem *di; WCHAR space = ' '; /* FIXME no no no */ if (ME_IsSelection(editor)) ME_DeleteSelection(editor); di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle, MERF_GRAPHICS); di->member.run.ole_obj = ALLOC_OBJ(*reo); ME_CopyReObject(di->member.run.ole_obj, reo); ME_ReleaseStyle(pStyle); } void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor) { ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor); WCHAR space = ' '; /* FIXME no no no */ if (ME_IsSelection(editor)) ME_DeleteSelection(editor); ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle, MERF_ENDROW); ME_ReleaseStyle(pStyle); } void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor, const WCHAR *str, int len, ME_Style *style) { const WCHAR *pos; ME_Cursor *p = NULL; int oldLen; /* FIXME really HERE ? */ if (ME_IsSelection(editor)) ME_DeleteSelection(editor); /* FIXME: is this too slow? */ /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */ oldLen = ME_GetTextLength(editor); /* text operations set modified state */ editor->nModifyStep = 1; assert(style); assert(nCursor>=0 && nCursor<editor->nCursors); if (len == -1) len = lstrlenW(str); /* grow the text limit to fit our text */ if(editor->nTextLimit < oldLen +len) editor->nTextLimit = oldLen + len; pos = str; while (len) { /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */ while(pos - str < len && *pos != '\r' && *pos != '\n' && *pos != '\t') pos++; if (pos != str) { /* handle text */ ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0); } else if (*pos == '\t') { /* handle tabs */ WCHAR tab = '\t'; ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB); pos++; } else { /* handle EOLs */ ME_DisplayItem *tp, *end_run; ME_Style *tmp_style; int eol_len = 0; /* Find number of CR and LF in end of paragraph run */ if (*pos =='\r') { if (len > 1 && pos[1] == '\n') eol_len = 2; else if (len > 2 && pos[1] == '\r' && pos[2] == '\n') eol_len = 3; else eol_len = 1; } else { assert(*pos == '\n'); eol_len = 1; } pos += eol_len; if (!editor->bEmulateVersion10 && eol_len == 3) { /* handle special \r\r\n sequence (richedit 2.x and higher only) */ WCHAR space = ' '; ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0); } else { ME_String *eol_str; if (!editor->bEmulateVersion10) { WCHAR cr = '\r'; eol_str = ME_MakeStringN(&cr, 1); } else { eol_str = ME_MakeStringN(str, eol_len); } p = &editor->pCursors[nCursor]; if (p->nOffset) ME_SplitRunSimple(editor, p); tmp_style = ME_GetInsertStyle(editor, nCursor); /* ME_SplitParagraph increases style refcount */ tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, eol_str, 0); p->pRun = ME_FindItemFwd(tp, diRun); p->pPara = tp; end_run = ME_FindItemBack(tp, diRun); ME_ReleaseStyle(end_run->member.run.style); end_run->member.run.style = tmp_style; p->nOffset = 0; } } len -= pos - str; str = pos; } } /* Move the cursor nRelOfs characters (either forwards or backwards) * * returns the actual number of characters moved. **/ int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs) { cursor->nOffset += nRelOfs; if (cursor->nOffset < 0) { cursor->nOffset += cursor->pRun->member.run.nCharOfs; if (cursor->nOffset >= 0) { /* new offset in the same paragraph */ do { cursor->pRun = ME_FindItemBack(cursor->pRun, diRun); } while (cursor->nOffset < cursor->pRun->member.run.nCharOfs); cursor->nOffset -= cursor->pRun->member.run.nCharOfs; return nRelOfs; } cursor->nOffset += cursor->pPara->member.para.nCharOfs; if (cursor->nOffset <= 0) { /* moved to the start of the text */ nRelOfs -= cursor->nOffset; ME_SetCursorToStart(editor, cursor); return nRelOfs; } /* new offset in a previous paragraph */ do { cursor->pPara = cursor->pPara->member.para.prev_para; } while (cursor->nOffset < cursor->pPara->member.para.nCharOfs); cursor->nOffset -= cursor->pPara->member.para.nCharOfs; cursor->pRun = ME_FindItemBack(cursor->pPara->member.para.next_para, diRun); while (cursor->nOffset < cursor->pRun->member.run.nCharOfs) { cursor->pRun = ME_FindItemBack(cursor->pRun, diRun); } cursor->nOffset -= cursor->pRun->member.run.nCharOfs; } else if (cursor->nOffset >= cursor->pRun->member.run.strText->nLen) { ME_DisplayItem *next_para; int new_offset; new_offset = ME_GetCursorOfs(cursor); next_para = cursor->pPara->member.para.next_para; if (new_offset < next_para->member.para.nCharOfs) { /* new offset in the same paragraph */ do { cursor->nOffset -= cursor->pRun->member.run.strText->nLen; cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun); } while (cursor->nOffset >= cursor->pRun->member.run.strText->nLen); return nRelOfs; } if (new_offset >= ME_GetTextLength(editor)) { /* new offset at the end of the text */ ME_SetCursorToEnd(editor, cursor); nRelOfs -= new_offset - ME_GetTextLength(editor); return nRelOfs; } /* new offset in a following paragraph */ do { cursor->pPara = next_para; next_para = next_para->member.para.next_para; } while (new_offset >= next_para->member.para.nCharOfs); cursor->nOffset = new_offset - cursor->pPara->member.para.nCharOfs; cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun); while (cursor->nOffset >= cursor->pRun->member.run.strText->nLen) { cursor->nOffset -= cursor->pRun->member.run.strText->nLen; cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun); } } /* else new offset is in the same run */ return nRelOfs; } static BOOL ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs) { ME_DisplayItem *pRun = cursor->pRun, *pOtherRun; ME_DisplayItem *pPara = cursor->pPara; int nOffset = cursor->nOffset; if (nRelOfs == -1) { /* Backward movement */ while (TRUE) { nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText, nOffset, WB_MOVEWORDLEFT); if (nOffset) break; pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph); if (pOtherRun->type == diRun) { if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText, pOtherRun->member.run.strText->nLen - 1, WB_ISDELIMITER) && !(pRun->member.run.nFlags & MERF_ENDPARA) && !(cursor->pRun == pRun && cursor->nOffset == 0) && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0, WB_ISDELIMITER)) break; pRun = pOtherRun; nOffset = pOtherRun->member.run.strText->nLen; } else if (pOtherRun->type == diParagraph) { if (cursor->pRun == pRun && cursor->nOffset == 0) { pPara = pOtherRun; /* Skip empty start of table row paragraph */ if (pPara->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART) pPara = pPara->member.para.prev_para; /* Paragraph breaks are treated as separate words */ if (pPara->member.para.prev_para->type == diTextStart) return FALSE; pRun = ME_FindItemBack(pPara, diRun); pPara = pPara->member.para.prev_para; } break; } } } else { /* Forward movement */ BOOL last_delim = FALSE; while (TRUE) { if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText, nOffset, WB_ISDELIMITER)) break; nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText, nOffset, WB_MOVEWORDRIGHT); if (nOffset < pRun->member.run.strText->nLen) break; pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd); if (pOtherRun->type == diRun) { last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText, nOffset - 1, WB_ISDELIMITER); pRun = pOtherRun; nOffset = 0; } else if (pOtherRun->type == diParagraph) { if (pOtherRun->member.para.nFlags & MEPF_ROWSTART) pOtherRun = pOtherRun->member.para.next_para; if (cursor->pRun == pRun) { pPara = pOtherRun; pRun = ME_FindItemFwd(pPara, diRun); } nOffset = 0; break; } else /* diTextEnd */ { if (cursor->pRun == pRun) return FALSE; nOffset = 0; break; } } } cursor->pPara = pPara; cursor->pRun = pRun; cursor->nOffset = nOffset; return TRUE; } static void ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType) { /* pCursor[0] is the end of the selection * pCursor[1] is the start of the selection (or the position selection anchor) * pCursor[2] and [3] are the selection anchors that are backed up * so they are kept when the selection changes for drag selection. */ editor->nSelectionType = selectionType; switch(selectionType) { case stPosition: break; case stWord: ME_MoveCursorWords(editor, &editor->pCursors[0], +1); editor->pCursors[1] = editor->pCursors[0]; ME_MoveCursorWords(editor, &editor->pCursors[1], -1); break; case stLine: case stParagraph: { ME_DisplayItem *pItem; ME_DIType fwdSearchType, backSearchType; if (selectionType == stParagraph) { backSearchType = diParagraph; fwdSearchType = diParagraphOrEnd; } else { backSearchType = diStartRow; fwdSearchType = diStartRowOrParagraphOrEnd; } pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType); assert(pItem); if (pItem->type == diTextEnd) editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun); else editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun); editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun); editor->pCursors[0].nOffset = 0; pItem = ME_FindItemBack(pItem, backSearchType); editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun); editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun); editor->pCursors[1].nOffset = 0; break; } case stDocument: /* Select everything with cursor anchored from the start of the text */ editor->nSelectionType = stDocument; ME_SetCursorToStart(editor, &editor->pCursors[1]); ME_SetCursorToEnd(editor, &editor->pCursors[0]); break; default: assert(0); } /* Store the anchor positions for extending the selection. */ editor->pCursors[2] = editor->pCursors[0]; editor->pCursors[3] = editor->pCursors[1]; } int ME_GetCursorOfs(const ME_Cursor *cursor) { return cursor->pPara->member.para.nCharOfs + cursor->pRun->member.run.nCharOfs + cursor->nOffset; } /* Helper function for ME_FindPixelPos to find paragraph within tables */ static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y, ME_DisplayItem *para) { ME_DisplayItem *cell, *next_cell; assert(para->member.para.nFlags & MEPF_ROWSTART); cell = para->member.para.next_para->member.para.pCell; assert(cell); /* find the cell we are in */ while ((next_cell = cell->member.cell.next_cell) != NULL) { if (x < next_cell->member.cell.pt.x) { para = ME_FindItemFwd(cell, diParagraph); /* Found the cell, but there might be multiple paragraphs in * the cell, so need to search down the cell for the paragraph. */ while (cell == para->member.para.pCell) { if (y < para->member.para.pt.y + para->member.para.nHeight) { if (para->member.para.nFlags & MEPF_ROWSTART) return ME_FindPixelPosInTableRow(x, y, para); else return para; } para = para->member.para.next_para; } /* Past the end of the cell, so go back to the last cell paragraph */ return para->member.para.prev_para; } cell = next_cell; } /* Return table row delimiter */ para = ME_FindItemFwd(cell, diParagraph); assert(para->member.para.nFlags & MEPF_ROWEND); assert(para->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER); assert(para->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER); return para; } static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found, ME_Cursor *result, int rx, BOOL isExact) { assert(found); assert(found->type == diRun); if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0) rx = 0; result->pRun = found; result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run); if (result->nOffset == found->member.run.strText->nLen && rx) { result->pRun = ME_FindItemFwd(result->pRun, diRun); result->nOffset = 0; } result->pPara = ME_GetParagraph(result->pRun); return isExact; } /* Finds the run and offset from the pixel position. * * x & y are pixel positions in virtual coordinates into the rich edit control, * so client coordinates must first be adjusted by the scroll position. * * returns TRUE if the result was exactly under the cursor, otherwise returns * FALSE, and result is set to the closest position to the coordinates. */ static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol) { ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para; ME_DisplayItem *last = NULL; int rx = 0; BOOL isExact = TRUE; x -= editor->rcFormat.left; y -= editor->rcFormat.top; if (is_eol) *is_eol = 0; /* find paragraph */ for (; p != editor->pBuffer->pLast; p = p->member.para.next_para) { assert(p->type == diParagraph); if (y < p->member.para.pt.y + p->member.para.nHeight) { if (p->member.para.nFlags & MEPF_ROWSTART) p = ME_FindPixelPosInTableRow(x, y, p); y -= p->member.para.pt.y; p = ME_FindItemFwd(p, diStartRow); break; } else if (p->member.para.nFlags & MEPF_ROWSTART) { p = ME_GetTableRowEnd(p); } } /* find row */ for (; p != editor->pBuffer->pLast; ) { ME_DisplayItem *pp; assert(p->type == diStartRow); if (y < p->member.row.pt.y + p->member.row.nHeight) { p = ME_FindItemFwd(p, diRun); break; } pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd); if (pp->type != diStartRow) { p = ME_FindItemFwd(p, diRun); break; } p = pp; } if (p == editor->pBuffer->pLast) { /* The position is below the last paragraph, so the last row will be used * rather than the end of the text, so the x position will be used to * determine the offset closest to the pixel position. */ isExact = FALSE; p = ME_FindItemBack(p, diStartRow); if (p != NULL){ p = ME_FindItemFwd(p, diRun); } else { p = editor->pBuffer->pLast; } } for (; p != editor->pBuffer->pLast; p = p->next) { switch (p->type) { case diRun: rx = x - p->member.run.pt.x; if (rx < p->member.run.nWidth) return ME_ReturnFoundPos(editor, p, result, rx, isExact); break; case diStartRow: isExact = FALSE; p = ME_FindItemFwd(p, diRun); if (is_eol) *is_eol = 1; rx = 0; /* FIXME not sure */ return ME_ReturnFoundPos(editor, p, result, rx, isExact); case diCell: case diParagraph: case diTextEnd: isExact = FALSE; rx = 0; /* FIXME not sure */ p = last; return ME_ReturnFoundPos(editor, p, result, rx, isExact); default: assert(0); } last = p; } result->pRun = ME_FindItemBack(p, diRun); result->pPara = ME_GetParagraph(result->pRun); result->nOffset = 0; assert(result->pRun->member.run.nFlags & MERF_ENDPARA); return FALSE; } /* Sets the cursor to the position closest to the pixel position * * x & y are pixel positions in client coordinates. * * isExact will be set to TRUE if the run is directly under the pixel * position, FALSE if it not, unless isExact is set to NULL. * * return FALSE if outside client area and the cursor is not set, * otherwise TRUE is returned. */ BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y, ME_Cursor *cursor, BOOL *isExact) { RECT rc; BOOL bResult; ITextHost_TxGetClientRect(editor->texthost, &rc); if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) { if (isExact) *isExact = FALSE; return FALSE; } x += editor->horz_si.nPos; y += editor->vert_si.nPos; bResult = ME_FindPixelPos(editor, x, y, cursor, NULL); if (isExact) *isExact = bResult; return TRUE; } /* Extends the selection with a word, line, or paragraph selection type. * * The selection is anchored by editor->pCursors[2-3] such that the text * between the anchors will remain selected, and one end will be extended. * * editor->pCursors[0] should have the position to extend the selection to * before this function is called. * * Nothing will be done if editor->nSelectionType equals stPosition. */ static void ME_ExtendAnchorSelection(ME_TextEditor *editor) { ME_Cursor tmp_cursor; int curOfs, anchorStartOfs, anchorEndOfs; if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument) return; curOfs = ME_GetCursorOfs(&editor->pCursors[0]); anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]); anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]); tmp_cursor = editor->pCursors[0]; editor->pCursors[0] = editor->pCursors[2]; editor->pCursors[1] = editor->pCursors[3]; if (curOfs < anchorStartOfs) { /* Extend the left side of selection */ editor->pCursors[1] = tmp_cursor; if (editor->nSelectionType == stWord) ME_MoveCursorWords(editor, &editor->pCursors[1], -1); else { ME_DisplayItem *pItem; ME_DIType searchType = ((editor->nSelectionType == stLine) ? diStartRowOrParagraph:diParagraph); pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType); editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun); editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun); editor->pCursors[1].nOffset = 0; } } else if (curOfs >= anchorEndOfs) { /* Extend the right side of selection */ editor->pCursors[0] = tmp_cursor; if (editor->nSelectionType == stWord) ME_MoveCursorWords(editor, &editor->pCursors[0], +1); else { ME_DisplayItem *pItem; ME_DIType searchType = ((editor->nSelectionType == stLine) ? diStartRowOrParagraphOrEnd:diParagraphOrEnd); pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType); if (pItem->type == diTextEnd) editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun); else editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun); editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun); editor->pCursors[0].nOffset = 0; } } } void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum) { ME_Cursor tmp_cursor; int is_selection = 0; BOOL is_shift; editor->nUDArrowX = -1; x += editor->horz_si.nPos; y += editor->vert_si.nPos; tmp_cursor = editor->pCursors[0]; is_selection = ME_IsSelection(editor); is_shift = GetKeyState(VK_SHIFT) < 0; ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd); if (x >= editor->rcFormat.left || is_shift) { if (clickNum > 1) { editor->pCursors[1] = editor->pCursors[0]; if (is_shift) { if (x >= editor->rcFormat.left) ME_SelectByType(editor, stWord); else ME_SelectByType(editor, stParagraph); } else if (clickNum % 2 == 0) { ME_SelectByType(editor, stWord); } else { ME_SelectByType(editor, stParagraph); } } else if (!is_shift) { editor->nSelectionType = stPosition; editor->pCursors[1] = editor->pCursors[0]; } else if (!is_selection) { editor->nSelectionType = stPosition; editor->pCursors[1] = tmp_cursor; } else if (editor->nSelectionType != stPosition) { ME_ExtendAnchorSelection(editor); } } else { if (clickNum < 2) { ME_SelectByType(editor, stLine); } else if (clickNum % 2 == 0 || is_shift) { ME_SelectByType(editor, stParagraph); } else { ME_SelectByType(editor, stDocument); } } ME_InvalidateSelection(editor); ITextHost_TxShowCaret(editor->texthost, FALSE); ME_ShowCaret(editor); ME_ClearTempStyle(editor); ME_SendSelChange(editor); } void ME_MouseMove(ME_TextEditor *editor, int x, int y) { ME_Cursor tmp_cursor; if (editor->nSelectionType == stDocument) return; x += editor->horz_si.nPos; y += editor->vert_si.nPos; tmp_cursor = editor->pCursors[0]; /* FIXME: do something with the return value of ME_FindPixelPos */ ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd); ME_InvalidateSelection(editor); editor->pCursors[0] = tmp_cursor; ME_ExtendAnchorSelection(editor); if (editor->nSelectionType != stPosition && memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor))) { /* The scroll the cursor towards the other end, since it was the one * extended by ME_ExtendAnchorSelection */ ME_EnsureVisible(editor, &editor->pCursors[1]); } else { ME_EnsureVisible(editor, &editor->pCursors[0]); } ME_InvalidateSelection(editor); ITextHost_TxShowCaret(editor->texthost, FALSE); ME_ShowCaret(editor); ME_SendSelChange(editor); } static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow, int x, int *pOffset, int *pbCaretAtEnd) { ME_DisplayItem *pNext, *pLastRun; pNext = ME_FindItemFwd(pRow, diRunOrStartRow); assert(pNext->type == diRun); if (pbCaretAtEnd) *pbCaretAtEnd = FALSE; if (pOffset) *pOffset = 0; do { int run_x = pNext->member.run.pt.x; int width = pNext->member.run.nWidth; if (x < run_x) { return pNext; } if (x >= run_x && x < run_x+width) { int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run); ME_String *s = pNext->member.run.strText; if (ch < s->nLen) { if (pOffset) *pOffset = ch; return pNext; } } pLastRun = pNext; pNext = ME_FindItemFwd(pNext, diRunOrStartRow); } while(pNext && pNext->type == diRun); if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0) { pNext = ME_FindItemFwd(pNext, diRun); if (pbCaretAtEnd) *pbCaretAtEnd = TRUE; return pNext; } else { return pLastRun; } } static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_DisplayItem *pRun = pCursor->pRun; int x; if (editor->nUDArrowX != -1) x = editor->nUDArrowX; else { if (editor->bCaretAtEnd) { pRun = ME_FindItemBack(pRun, diRun); assert(pRun); x = pRun->member.run.pt.x + pRun->member.run.nWidth; } else { x = pRun->member.run.pt.x; x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset); } editor->nUDArrowX = x; } return x; } static void ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs) { ME_DisplayItem *pRun = pCursor->pRun; ME_DisplayItem *pOldPara = pCursor->pPara; ME_DisplayItem *pItem, *pNewPara; int x = ME_GetXForArrow(editor, pCursor); if (editor->bCaretAtEnd && !pCursor->nOffset) if (!ME_PrevRun(&pOldPara, &pRun)) return; if (nRelOfs == -1) { /* start of this row */ pItem = ME_FindItemBack(pRun, diStartRow); assert(pItem); /* start of the previous row */ pItem = ME_FindItemBack(pItem, diStartRow); if (!pItem) return; /* row not found - ignore */ pNewPara = ME_GetParagraph(pItem); if (pOldPara->member.para.nFlags & MEPF_ROWEND || (pOldPara->member.para.pCell && pOldPara->member.para.pCell != pNewPara->member.para.pCell)) { /* Brought out of a cell */ pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para; if (pNewPara->type == diTextStart) return; /* At the top, so don't go anywhere. */ pItem = ME_FindItemFwd(pNewPara, diStartRow); } if (pNewPara->member.para.nFlags & MEPF_ROWEND) { /* Brought into a table row */ ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell; while (x < cell->pt.x && cell->prev_cell) cell = &cell->prev_cell->member.cell; if (cell->next_cell) /* else - we are still at the end of the row */ pItem = ME_FindItemBack(cell->next_cell, diStartRow); } } else { /* start of the next row */ pItem = ME_FindItemFwd(pRun, diStartRow); if (!pItem) return; /* row not found - ignore */ pNewPara = ME_GetParagraph(pItem); if (pOldPara->member.para.nFlags & MEPF_ROWSTART || (pOldPara->member.para.pCell && pOldPara->member.para.pCell != pNewPara->member.para.pCell)) { /* Brought out of a cell */ pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para; if (pNewPara->type == diTextEnd) return; /* At the bottom, so don't go anywhere. */ pItem = ME_FindItemFwd(pNewPara, diStartRow); } if (pNewPara->member.para.nFlags & MEPF_ROWSTART) { /* Brought into a table row */ ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell); while (cell->member.cell.next_cell && x >= cell->member.cell.next_cell->member.cell.pt.x) cell = cell->member.cell.next_cell; pItem = ME_FindItemFwd(cell, diStartRow); } } if (!pItem) { /* row not found - ignore */ return; } pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd); pCursor->pPara = ME_GetParagraph(pCursor->pRun); assert(pCursor->pRun); assert(pCursor->pRun->type == diRun); } static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow); if (editor->vert_si.nPos < p->member.row.nHeight) { ME_SetCursorToStart(editor, pCursor); editor->bCaretAtEnd = FALSE; /* Native clears seems to clear this x value on page up at the top * of the text, but not on page down at the end of the text. * Doesn't make sense, but we try to be bug for bug compatible. */ editor->nUDArrowX = -1; } else { ME_DisplayItem *pRun = pCursor->pRun; ME_DisplayItem *pLast; int x, y, yd, yp; int yOldScrollPos = editor->vert_si.nPos; x = ME_GetXForArrow(editor, pCursor); if (!pCursor->nOffset && editor->bCaretAtEnd) pRun = ME_FindItemBack(pRun, diRun); p = ME_FindItemBack(pRun, diStartRowOrParagraph); assert(p->type == diStartRow); yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y; y = yp + p->member.row.pt.y; ME_ScrollUp(editor, editor->sizeWindow.cy); /* Only move the cursor by the amount scrolled. */ yd = y + editor->vert_si.nPos - yOldScrollPos; pLast = p; do { p = ME_FindItemBack(p, diStartRowOrParagraph); if (!p) break; if (p->type == diParagraph) { /* crossing paragraphs */ if (p->member.para.prev_para == NULL) break; yp = p->member.para.prev_para->member.para.pt.y; continue; } y = yp + p->member.row.pt.y; if (y < yd) break; pLast = p; } while(1); pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd); pCursor->pPara = ME_GetParagraph(pCursor->pRun); } assert(pCursor->pRun); assert(pCursor->pRun->type == diRun); } static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_DisplayItem *pLast; int x, y; /* Find y position of the last row */ pLast = editor->pBuffer->pLast; y = pLast->member.para.prev_para->member.para.pt.y + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y; x = ME_GetXForArrow(editor, pCursor); if (editor->vert_si.nPos >= y - editor->sizeWindow.cy) { ME_SetCursorToEnd(editor, pCursor); editor->bCaretAtEnd = FALSE; } else { ME_DisplayItem *pRun = pCursor->pRun; ME_DisplayItem *p; int yd, yp; int yOldScrollPos = editor->vert_si.nPos; if (!pCursor->nOffset && editor->bCaretAtEnd) pRun = ME_FindItemBack(pRun, diRun); p = ME_FindItemBack(pRun, diStartRowOrParagraph); assert(p->type == diStartRow); yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y; y = yp + p->member.row.pt.y; /* For native richedit controls: * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us * v4.1 can scroll past this position here. */ ME_ScrollDown(editor, editor->sizeWindow.cy); /* Only move the cursor by the amount scrolled. */ yd = y + editor->vert_si.nPos - yOldScrollPos; pLast = p; do { p = ME_FindItemFwd(p, diStartRowOrParagraph); if (!p) break; if (p->type == diParagraph) { yp = p->member.para.pt.y; continue; } y = yp + p->member.row.pt.y; if (y >= yd) break; pLast = p; } while(1); pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd); pCursor->pPara = ME_GetParagraph(pCursor->pRun); } assert(pCursor->pRun); assert(pCursor->pRun->type == diRun); } static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow); if (pRow) { ME_DisplayItem *pRun; if (editor->bCaretAtEnd && !pCursor->nOffset) { pRow = ME_FindItemBack(pRow, diStartRow); if (!pRow) return; } pRun = ME_FindItemFwd(pRow, diRun); if (pRun) { pCursor->pRun = pRun; assert(pCursor->pPara == ME_GetParagraph(pRun)); pCursor->nOffset = 0; } } editor->bCaretAtEnd = FALSE; } static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_SetCursorToStart(editor, pCursor); editor->bCaretAtEnd = FALSE; } static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_DisplayItem *pRow; if (editor->bCaretAtEnd && !pCursor->nOffset) return; pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd); assert(pRow); if (pRow->type == diStartRow) { ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun); assert(pRun); pCursor->pRun = pRun; assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun)); pCursor->nOffset = 0; editor->bCaretAtEnd = TRUE; return; } pCursor->pRun = ME_FindItemBack(pRow, diRun); assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA); assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun)); pCursor->nOffset = 0; editor->bCaretAtEnd = FALSE; } static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor) { ME_SetCursorToEnd(editor, pCursor); editor->bCaretAtEnd = FALSE; } BOOL ME_IsSelection(ME_TextEditor *editor) { return editor->pCursors[0].pRun != editor->pCursors[1].pRun || editor->pCursors[0].nOffset != editor->pCursors[1].nOffset; } void ME_DeleteSelection(ME_TextEditor *editor) { int from, to; int nStartCursor = ME_GetSelectionOfs(editor, &from, &to); ME_DeleteTextAtCursor(editor, nStartCursor, to - from); } ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor) { return ME_GetInsertStyle(editor, 0); } void ME_SendSelChange(ME_TextEditor *editor) { SELCHANGE sc; if (!(editor->nEventMask & ENM_SELCHANGE)) return; sc.nmhdr.hwndFrom = NULL; sc.nmhdr.idFrom = 0; sc.nmhdr.code = EN_SELCHANGE; ME_GetSelectionOfs(editor, &sc.chrg.cpMin, &sc.chrg.cpMax); sc.seltyp = SEL_EMPTY; if (sc.chrg.cpMin != sc.chrg.cpMax) sc.seltyp |= SEL_TEXT; if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* what were RICHEDIT authors thinking ? */ sc.seltyp |= SEL_MULTICHAR; TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n", sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp, (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "", (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : ""); if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax) { ME_ClearTempStyle(editor); editor->notified_cr = sc.chrg; ITextHost_TxNotify(editor->texthost, sc.nmhdr.code, &sc); } } BOOL ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl) { int nCursor = 0; ME_Cursor *p = &editor->pCursors[nCursor]; ME_Cursor tmp_curs = *p; BOOL success = FALSE; ME_CheckCharOffsets(editor); switch(nVKey) { case VK_LEFT: editor->bCaretAtEnd = 0; if (ctrl) success = ME_MoveCursorWords(editor, &tmp_curs, -1); else success = ME_MoveCursorChars(editor, &tmp_curs, -1); break; case VK_RIGHT: editor->bCaretAtEnd = 0; if (ctrl) success = ME_MoveCursorWords(editor, &tmp_curs, +1); else success = ME_MoveCursorChars(editor, &tmp_curs, +1); break; case VK_UP: ME_MoveCursorLines(editor, &tmp_curs, -1); break; case VK_DOWN: ME_MoveCursorLines(editor, &tmp_curs, +1); break; case VK_PRIOR: ME_ArrowPageUp(editor, &tmp_curs); break; case VK_NEXT: ME_ArrowPageDown(editor, &tmp_curs); break; case VK_HOME: { if (ctrl) ME_ArrowCtrlHome(editor, &tmp_curs); else ME_ArrowHome(editor, &tmp_curs); editor->bCaretAtEnd = 0; break; } case VK_END: if (ctrl) ME_ArrowCtrlEnd(editor, &tmp_curs); else ME_ArrowEnd(editor, &tmp_curs); break; } if (!extend) editor->pCursors[1] = tmp_curs; *p = tmp_curs; ME_InvalidateSelection(editor); ME_Repaint(editor); ITextHost_TxShowCaret(editor->texthost, FALSE); ME_EnsureVisible(editor, &tmp_curs); ME_ShowCaret(editor); ME_SendSelChange(editor); return success; }