| /* |
| * 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) |
| { |
| int from_ofs = ME_GetCursorOfs( &editor->pCursors[0] ); |
| int to_ofs = ME_GetCursorOfs( &editor->pCursors[1] ); |
| BOOL swap = (from_ofs > to_ofs); |
| |
| if (from_ofs == to_ofs) |
| { |
| /* If cursor[0] is at the beginning of a run and cursor[1] at the end |
| of the prev run then we need to swap. */ |
| if (editor->pCursors[0].nOffset < editor->pCursors[1].nOffset) |
| swap = TRUE; |
| } |
| |
| if (!swap) |
| { |
| *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]); |
| editor->pCursors[0].nOffset = editor->pCursors[0].pRun->member.run.len; |
| ME_InvalidateSelection(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); |
| if (start != end) |
| { |
| if (end > len) |
| { |
| editor->pCursors[0].nOffset = 0; |
| end --; |
| } |
| editor->pCursors[1] = editor->pCursors[0]; |
| ME_Repaint(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); |
| 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) |
| { |
| if (to > len) |
| editor->pCursors[0].nOffset = editor->pCursors[0].pRun->member.run.len; |
| else |
| editor->pCursors[0].nOffset = 0; |
| } |
| return to; |
| } |
| |
| |
| 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; |
| int run_x; |
| |
| 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); |
| } |
| } |
| run_x = ME_PointFromCharContext( &c, &run->member.run, pCursor->nOffset, TRUE ); |
| |
| *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent; |
| *x = c.rcView.left + run->member.run.pt.x + run_x - 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), text_len = ME_GetTextLength( editor ); |
| int shift = 0; |
| int totalChars = nChars; |
| ME_DisplayItem *start_para; |
| BOOL delete_all = FALSE; |
| |
| /* Prevent deletion past last end of paragraph run. */ |
| nChars = min(nChars, text_len - nOfs); |
| if (nChars == text_len) delete_all = TRUE; |
| 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.len; |
| } |
| run = &c.pRun->member.run; |
| if (run->nFlags & MERF_ENDPARA) { |
| int eollen = c.pRun->member.run.len; |
| 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_run( run ), run->len); |
| |
| /* nOfs is a character offset (from the start of the document |
| to the current (deleted) run */ |
| add_undo_insert_run( editor, nOfs + nChars, get_text( run, c.nOffset ), nCharsToDelete, run->nFlags, run->style ); |
| |
| ME_StrDeleteV(run->para->text, run->nCharOfs + c.nOffset, nCharsToDelete); |
| run->len -= nCharsToDelete; |
| TRACE("Post deletion string: %s (%d)\n", debugstr_run( run ), run->len); |
| TRACE("Shift value: %d\n", shift); |
| |
| /* 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->len); |
| } |
| if (pThisCur->nOffset == run->len) |
| { |
| 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.len) |
| { |
| TRACE("Removing empty run\n"); |
| ME_Remove(cursor.pRun); |
| ME_DestroyDisplayItem(cursor.pRun); |
| } |
| |
| shift = 0; |
| /* |
| ME_CheckCharOffsets(editor); |
| */ |
| continue; |
| } |
| } |
| if (delete_all) ME_SetDefaultParaFormat( editor, start_para->member.para.pFmt ); |
| 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, *run, *prev; |
| 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 { |
| const WCHAR cr = '\r', *eol_str = str; |
| |
| if (!editor->bEmulateVersion10) |
| { |
| eol_str = &cr; |
| eol_len = 1; |
| } |
| |
| p = &editor->pCursors[nCursor]; |
| |
| if (p->nOffset == p->pRun->member.run.len) |
| { |
| run = ME_FindItemFwd( p->pRun, diRun ); |
| if (!run) run = p->pRun; |
| } |
| else |
| { |
| if (p->nOffset) ME_SplitRunSimple(editor, p); |
| run = p->pRun; |
| } |
| |
| tmp_style = ME_GetInsertStyle(editor, nCursor); |
| /* ME_SplitParagraph increases style refcount */ |
| tp = ME_SplitParagraph(editor, run, run->member.run.style, eol_str, eol_len, 0); |
| |
| end_run = ME_FindItemBack(tp, diRun); |
| ME_ReleaseStyle(end_run->member.run.style); |
| end_run->member.run.style = tmp_style; |
| |
| /* Move any cursors that were at the end of the previous run to the beginning of the new para */ |
| prev = ME_FindItemBack( end_run, diRun ); |
| if (prev) |
| { |
| int i; |
| for (i = 0; i < editor->nCursors; i++) |
| { |
| if (editor->pCursors[i].pRun == prev && |
| editor->pCursors[i].nOffset == prev->member.run.len) |
| { |
| editor->pCursors[i].pPara = tp; |
| editor->pCursors[i].pRun = run; |
| editor->pCursors[i].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.len) { |
| 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.len; |
| cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun); |
| } while (cursor->nOffset >= cursor->pRun->member.run.len); |
| 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.len) |
| { |
| cursor->nOffset -= cursor->pRun->member.run.len; |
| cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun); |
| } |
| } /* else new offset is in the same run */ |
| return nRelOfs; |
| } |
| |
| |
| 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, get_text( &pRun->member.run, 0 ), |
| pRun->member.run.len, nOffset, WB_MOVEWORDLEFT); |
| if (nOffset) |
| break; |
| pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph); |
| if (pOtherRun->type == diRun) |
| { |
| if (ME_CallWordBreakProc(editor, get_text( &pOtherRun->member.run, 0 ), |
| pOtherRun->member.run.len, |
| pOtherRun->member.run.len - 1, |
| WB_ISDELIMITER) |
| && !(pRun->member.run.nFlags & MERF_ENDPARA) |
| && !(cursor->pRun == pRun && cursor->nOffset == 0) |
| && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ), |
| pRun->member.run.len, 0, |
| WB_ISDELIMITER)) |
| break; |
| pRun = pOtherRun; |
| nOffset = pOtherRun->member.run.len; |
| } |
| 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, get_text( &pRun->member.run, 0 ), |
| pRun->member.run.len, nOffset, WB_ISDELIMITER)) |
| break; |
| nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ), |
| pRun->member.run.len, nOffset, WB_MOVEWORDRIGHT); |
| if (nOffset < pRun->member.run.len) |
| break; |
| pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd); |
| if (pOtherRun->type == diRun) |
| { |
| last_delim = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ), |
| pRun->member.run.len, 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_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow, |
| int x, ME_Cursor *cursor, BOOL *pbCaretAtEnd) |
| { |
| ME_DisplayItem *pNext, *pLastRun; |
| ME_Row *row = &pRow->member.row; |
| BOOL exact = TRUE; |
| |
| if (x < row->pt.x) |
| { |
| x = row->pt.x; |
| exact = FALSE; |
| } |
| pNext = ME_FindItemFwd(pRow, diRunOrStartRow); |
| assert(pNext->type == diRun); |
| if (pbCaretAtEnd) *pbCaretAtEnd = FALSE; |
| cursor->nOffset = 0; |
| do { |
| int run_x = pNext->member.run.pt.x; |
| int width = pNext->member.run.nWidth; |
| |
| if (x >= run_x && x < run_x+width) |
| { |
| cursor->nOffset = ME_CharFromPoint(editor, x-run_x, &pNext->member.run, TRUE, TRUE); |
| cursor->pRun = pNext; |
| cursor->pPara = ME_GetParagraph( cursor->pRun ); |
| return exact; |
| } |
| pLastRun = pNext; |
| pNext = ME_FindItemFwd(pNext, diRunOrStartRow); |
| } while(pNext && pNext->type == diRun); |
| |
| if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0) |
| { |
| cursor->pRun = ME_FindItemFwd(pNext, diRun); |
| if (pbCaretAtEnd) *pbCaretAtEnd = TRUE; |
| } |
| else |
| cursor->pRun = pLastRun; |
| |
| cursor->pPara = ME_GetParagraph( cursor->pRun ); |
| return FALSE; |
| } |
| |
| /* 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; |
| BOOL isExact = TRUE; |
| |
| x -= editor->rcFormat.left; |
| y -= editor->rcFormat.top; |
| |
| if (is_eol) |
| *is_eol = FALSE; |
| |
| /* 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) break; |
| pp = ME_FindItemFwd(p, diStartRow); |
| if (!pp) 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) p = editor->pBuffer->pLast; |
| } |
| |
| assert( p->type == diStartRow || p == editor->pBuffer->pLast ); |
| |
| if( p->type == diStartRow ) |
| return ME_FindRunInRow( editor, p, x, result, is_eol ) && isExact; |
| |
| 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; |
| BOOL is_selection = FALSE, 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_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 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, TRUE); |
| } |
| 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; |
| } |
| ME_FindRunInRow(editor, pItem, x, pCursor, &editor->bCaretAtEnd); |
| 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); |
| |
| ME_FindRunInRow(editor, pLast, x, pCursor, &editor->bCaretAtEnd); |
| } |
| 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); |
| |
| ME_FindRunInRow(editor, pLast, x, pCursor, &editor->bCaretAtEnd); |
| } |
| 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); |
| int nEndCursor = nStartCursor ^ 1; |
| ME_DeleteTextAtCursor(editor, nStartCursor, to - from); |
| editor->pCursors[nEndCursor] = editor->pCursors[nStartCursor]; |
| } |
| |
| 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 = FALSE; |
| if (ctrl) |
| success = ME_MoveCursorWords(editor, &tmp_curs, -1); |
| else |
| success = ME_MoveCursorChars(editor, &tmp_curs, -1); |
| break; |
| case VK_RIGHT: |
| editor->bCaretAtEnd = FALSE; |
| 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 = FALSE; |
| 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; |
| } |
