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1648 lines
49 KiB
C
1648 lines
49 KiB
C
/*
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* RichEdit - Caret and selection functions.
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*
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* Copyright 2004 by Krzysztof Foltman
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* Copyright 2005 by Phil Krylov
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "editor.h"
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WINE_DEFAULT_DEBUG_CHANNEL(richedit);
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void ME_SetCursorToStart(ME_TextEditor *editor, ME_Cursor *cursor)
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{
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cursor->pPara = editor->pBuffer->pFirst->member.para.next_para;
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cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
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cursor->nOffset = 0;
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}
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static void ME_SetCursorToEnd(ME_TextEditor *editor, ME_Cursor *cursor, BOOL final_eop)
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{
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cursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
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cursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
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cursor->nOffset = final_eop ? cursor->pRun->member.run.len : 0;
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}
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int ME_GetSelectionOfs(ME_TextEditor *editor, int *from, int *to)
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{
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*from = ME_GetCursorOfs(&editor->pCursors[0]);
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*to = ME_GetCursorOfs(&editor->pCursors[1]);
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if (*from > *to)
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{
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int tmp = *from;
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*from = *to;
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*to = tmp;
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return 1;
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}
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return 0;
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}
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int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to)
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{
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int from_ofs = ME_GetCursorOfs( &editor->pCursors[0] );
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int to_ofs = ME_GetCursorOfs( &editor->pCursors[1] );
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BOOL swap = (from_ofs > to_ofs);
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if (from_ofs == to_ofs)
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{
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/* If cursor[0] is at the beginning of a run and cursor[1] at the end
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of the prev run then we need to swap. */
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if (editor->pCursors[0].nOffset < editor->pCursors[1].nOffset)
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swap = TRUE;
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}
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if (!swap)
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{
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*from = &editor->pCursors[0];
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*to = &editor->pCursors[1];
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return 0;
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} else {
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*from = &editor->pCursors[1];
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*to = &editor->pCursors[0];
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return 1;
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}
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}
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int ME_GetTextLength(ME_TextEditor *editor)
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{
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ME_Cursor cursor;
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ME_SetCursorToEnd(editor, &cursor, FALSE);
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return ME_GetCursorOfs(&cursor);
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}
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int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
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{
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int length;
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if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
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return E_INVALIDARG;
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if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
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return E_INVALIDARG;
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length = ME_GetTextLength(editor);
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if ((editor->styleFlags & ES_MULTILINE)
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&& (how->flags & GTL_USECRLF)
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&& !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
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length += editor->nParagraphs - 1;
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if (how->flags & GTL_NUMBYTES ||
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(how->flags & GTL_PRECISE && /* GTL_PRECISE seems to imply GTL_NUMBYTES */
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!(how->flags & GTL_NUMCHARS))) /* unless GTL_NUMCHARS is given */
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{
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CPINFO cpinfo;
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if (how->codepage == 1200)
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return length * 2;
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if (how->flags & GTL_PRECISE)
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FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
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if (GetCPInfo(how->codepage, &cpinfo))
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return length * cpinfo.MaxCharSize;
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ERR("Invalid codepage %u\n", how->codepage);
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return E_INVALIDARG;
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}
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return length;
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}
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/******************************************************************
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* set_selection_cursors
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*
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* Updates the selection cursors.
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*
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* Note that this does not invalidate either the old or the new selections.
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*/
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int set_selection_cursors(ME_TextEditor *editor, int from, int to)
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{
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int selectionEnd = 0;
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const int len = ME_GetTextLength(editor);
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/* all negative values are effectively the same */
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if (from < 0)
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from = -1;
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if (to < 0)
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to = -1;
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/* select all */
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if (from == 0 && to == -1)
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{
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ME_SetCursorToStart(editor, &editor->pCursors[1]);
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ME_SetCursorToEnd(editor, &editor->pCursors[0], TRUE);
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return len + 1;
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}
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/* if both values are equal and also out of bound, that means to */
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/* put the selection at the end of the text */
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if ((from == to) && (to < 0 || to > len))
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{
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selectionEnd = 1;
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}
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else
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{
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/* if from is negative and to is positive then selection is */
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/* deselected and caret moved to end of the current selection */
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if (from < 0)
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{
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int start, end;
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ME_GetSelectionOfs(editor, &start, &end);
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if (start != end)
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{
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if (end > len)
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{
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editor->pCursors[0].nOffset = 0;
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end --;
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}
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editor->pCursors[1] = editor->pCursors[0];
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}
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return end;
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}
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/* adjust to if it's a negative value */
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if (to < 0)
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to = len + 1;
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/* flip from and to if they are reversed */
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if (from>to)
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{
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int tmp = from;
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from = to;
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to = tmp;
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}
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/* after fiddling with the values, we find from > len && to > len */
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if (from > len)
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selectionEnd = 1;
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/* special case with to too big */
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else if (to > len)
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to = len + 1;
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}
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if (selectionEnd)
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{
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ME_SetCursorToEnd(editor, &editor->pCursors[0], FALSE);
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editor->pCursors[1] = editor->pCursors[0];
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return len;
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}
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ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]);
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editor->pCursors[0] = editor->pCursors[1];
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ME_MoveCursorChars(editor, &editor->pCursors[0], to - from, FALSE);
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/* Selection is not allowed in the middle of an end paragraph run. */
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if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA)
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editor->pCursors[1].nOffset = 0;
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if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA)
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{
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if (to > len)
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editor->pCursors[0].nOffset = editor->pCursors[0].pRun->member.run.len;
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else
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editor->pCursors[0].nOffset = 0;
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}
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return to;
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}
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void ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
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int *x, int *y, int *height)
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{
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ME_DisplayItem *row;
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ME_DisplayItem *run = pCursor->pRun;
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ME_DisplayItem *para = pCursor->pPara;
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ME_DisplayItem *pSizeRun = run;
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ME_Context c;
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int run_x;
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assert(height && x && y);
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assert(~para->member.para.nFlags & MEPF_REWRAP);
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assert(run && run->type == diRun);
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assert(para && para->type == diParagraph);
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row = ME_FindItemBack(run, diStartRowOrParagraph);
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assert(row && row->type == diStartRow);
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ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
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if (!pCursor->nOffset)
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{
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ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph);
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assert(prev);
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if (prev->type == diRun)
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pSizeRun = prev;
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}
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if (editor->bCaretAtEnd && !pCursor->nOffset &&
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run == ME_FindItemFwd(row, diRun))
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{
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ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
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assert(tmp);
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if (tmp->type == diRun)
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{
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row = ME_FindItemBack(tmp, diStartRow);
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pSizeRun = run = tmp;
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assert(run);
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assert(run->type == diRun);
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}
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}
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run_x = ME_PointFromCharContext( &c, &run->member.run, pCursor->nOffset, TRUE );
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*height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
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*x = c.rcView.left + run->member.run.pt.x + run_x - editor->horz_si.nPos;
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*y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline
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+ run->member.run.pt.y - pSizeRun->member.run.nAscent
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- editor->vert_si.nPos;
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ME_DestroyContext(&c);
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return;
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}
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void create_caret(ME_TextEditor *editor)
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{
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int x, y, height;
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ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
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ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height);
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editor->caret_height = height;
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editor->caret_hidden = TRUE;
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}
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void show_caret(ME_TextEditor *editor)
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{
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ITextHost_TxShowCaret(editor->texthost, TRUE);
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editor->caret_hidden = FALSE;
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}
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void hide_caret(ME_TextEditor *editor)
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{
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/* calls to HideCaret are cumulative; do so only once */
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if (!editor->caret_hidden)
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{
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ITextHost_TxShowCaret(editor->texthost, FALSE);
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editor->caret_hidden = TRUE;
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}
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}
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void update_caret(ME_TextEditor *editor)
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{
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int x, y, height;
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if (!editor->bHaveFocus) return;
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if (!ME_IsSelection(editor))
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{
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ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
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if (height != editor->caret_height) create_caret(editor);
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x = min(x, editor->rcFormat.right-1);
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ITextHost_TxSetCaretPos(editor->texthost, x, y);
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show_caret(editor);
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}
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else
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hide_caret(editor);
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}
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BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start,
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int nChars, BOOL bForce)
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{
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ME_Cursor c = *start;
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int nOfs = ME_GetCursorOfs(start), text_len = ME_GetTextLength( editor );
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int shift = 0;
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int totalChars = nChars;
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ME_DisplayItem *start_para;
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BOOL delete_all = FALSE;
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/* Prevent deletion past last end of paragraph run. */
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nChars = min(nChars, text_len - nOfs);
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if (nChars == text_len) delete_all = TRUE;
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start_para = c.pPara;
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if (!bForce)
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{
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ME_ProtectPartialTableDeletion(editor, &c, &nChars);
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if (nChars == 0)
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return FALSE;
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}
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while(nChars > 0)
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{
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ME_Run *run;
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ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
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if (!c.nOffset &&
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nOfs+nChars == (c.pRun->member.run.nCharOfs
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+ c.pPara->member.para.nCharOfs))
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{
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/* We aren't deleting anything in this run, so we will go back to the
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* last run we are deleting text in. */
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ME_PrevRun(&c.pPara, &c.pRun, TRUE);
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c.nOffset = c.pRun->member.run.len;
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}
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run = &c.pRun->member.run;
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if (run->nFlags & MERF_ENDPARA) {
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int eollen = c.pRun->member.run.len;
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BOOL keepFirstParaFormat;
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if (!ME_FindItemFwd(c.pRun, diParagraph))
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{
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return TRUE;
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}
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keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
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run->nCharOfs);
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if (!editor->bEmulateVersion10) /* v4.1 */
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{
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ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
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ME_DisplayItem *this_para = next_para->member.para.prev_para;
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/* The end of paragraph before a table row is only deleted if there
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* is nothing else on the line before it. */
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if (this_para == start_para &&
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next_para->member.para.nFlags & MEPF_ROWSTART)
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{
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/* If the paragraph will be empty, then it should be deleted, however
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* it still might have text right now which would inherit the
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* MEPF_STARTROW property if we joined it right now.
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* Instead we will delete it after the preceding text is deleted. */
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if (nOfs > this_para->member.para.nCharOfs) {
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/* Skip this end of line. */
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nChars -= (eollen < nChars) ? eollen : nChars;
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continue;
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}
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keepFirstParaFormat = TRUE;
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}
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}
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ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat);
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/* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
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ME_CheckCharOffsets(editor);
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nChars -= (eollen < nChars) ? eollen : nChars;
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continue;
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}
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else
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{
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ME_Cursor cursor;
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int nCharsToDelete = min(nChars, c.nOffset);
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int i;
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c.nOffset -= nCharsToDelete;
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mark_para_rewrap(editor, ME_FindItemBack(c.pRun, diParagraph));
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cursor = c;
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/* nChars is the number of characters that should be deleted from the
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PRECEDING runs (these BEFORE cursor.pRun)
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nCharsToDelete is a number of chars to delete from THIS run */
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nChars -= nCharsToDelete;
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shift -= nCharsToDelete;
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TRACE("Deleting %d (remaining %d) chars at %d in %s (%d)\n",
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nCharsToDelete, nChars, c.nOffset,
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debugstr_run( run ), run->len);
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/* nOfs is a character offset (from the start of the document
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to the current (deleted) run */
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add_undo_insert_run( editor, nOfs + nChars, get_text( run, c.nOffset ), nCharsToDelete, run->nFlags, run->style );
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ME_StrDeleteV(run->para->text, run->nCharOfs + c.nOffset, nCharsToDelete);
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run->len -= nCharsToDelete;
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TRACE("Post deletion string: %s (%d)\n", debugstr_run( run ), run->len);
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TRACE("Shift value: %d\n", shift);
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/* update cursors (including c) */
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for (i=-1; i<editor->nCursors; i++) {
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ME_Cursor *pThisCur = editor->pCursors + i;
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if (i == -1) pThisCur = &c;
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if (pThisCur->pRun == cursor.pRun) {
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if (pThisCur->nOffset > cursor.nOffset) {
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if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
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pThisCur->nOffset = cursor.nOffset;
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else
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pThisCur->nOffset -= nCharsToDelete;
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assert(pThisCur->nOffset >= 0);
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assert(pThisCur->nOffset <= run->len);
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}
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if (pThisCur->nOffset == run->len)
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{
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pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
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assert(pThisCur->pRun->type == diRun);
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pThisCur->nOffset = 0;
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}
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}
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}
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/* c = updated data now */
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if (c.pRun == cursor.pRun)
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ME_SkipAndPropagateCharOffset(c.pRun, shift);
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else
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ME_PropagateCharOffset(c.pRun, shift);
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if (!cursor.pRun->member.run.len)
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{
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TRACE("Removing empty run\n");
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ME_Remove(cursor.pRun);
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ME_DestroyDisplayItem(cursor.pRun);
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}
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shift = 0;
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/*
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ME_CheckCharOffsets(editor);
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*/
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continue;
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}
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}
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if (delete_all) ME_SetDefaultParaFormat( editor, &start_para->member.para.fmt );
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return TRUE;
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}
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BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
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{
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assert(nCursor>=0 && nCursor<editor->nCursors);
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/* text operations set modified state */
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editor->nModifyStep = 1;
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return ME_InternalDeleteText(editor, &editor->pCursors[nCursor],
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nChars, FALSE);
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}
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static ME_DisplayItem *
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ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
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const WCHAR *str, int len, ME_Style *style,
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int flags)
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{
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ME_Cursor *p = &editor->pCursors[nCursor];
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editor->bCaretAtEnd = FALSE;
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assert(p->pRun->type == diRun);
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return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
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}
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static struct re_object* create_re_object(const REOBJECT *reo)
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{
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struct re_object *reobj = heap_alloc(sizeof(*reobj));
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|
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if (!reobj)
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{
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WARN("Fail to allocate re_object.\n");
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return NULL;
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}
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ME_CopyReObject(&reobj->obj, reo, REO_GETOBJ_ALL_INTERFACES);
|
|
return reobj;
|
|
}
|
|
|
|
void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
|
|
{
|
|
ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
|
|
ME_DisplayItem *di;
|
|
WCHAR space = ' ';
|
|
ME_DisplayItem *di_prev = NULL;
|
|
struct re_object *reobj_prev = NULL;
|
|
|
|
/* FIXME no no no */
|
|
if (ME_IsSelection(editor))
|
|
ME_DeleteSelection(editor);
|
|
|
|
di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
|
|
MERF_GRAPHICS);
|
|
di->member.run.reobj = create_re_object(reo);
|
|
|
|
di_prev = di;
|
|
while (ME_PrevRun(NULL, &di_prev, TRUE))
|
|
{
|
|
if (di_prev->member.run.reobj)
|
|
{
|
|
reobj_prev = di_prev->member.run.reobj;
|
|
break;
|
|
}
|
|
}
|
|
if (reobj_prev)
|
|
list_add_after(&reobj_prev->entry, &di->member.run.reobj->entry);
|
|
else
|
|
list_add_head(&editor->reobj_list, &di->member.run.reobj->entry);
|
|
|
|
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;
|
|
int eol_len = 0;
|
|
|
|
/* Check if new line is allowed for this control */
|
|
if (!(editor->styleFlags & ES_MULTILINE))
|
|
break;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
tp = ME_SplitParagraph(editor, run, style, eol_str, eol_len, 0);
|
|
|
|
end_run = ME_FindItemBack(tp, diRun);
|
|
|
|
/* 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)
|
|
* If final_eop is TRUE, allow moving the cursor to the end of the final eop.
|
|
*
|
|
* returns the actual number of characters moved.
|
|
**/
|
|
int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs, BOOL final_eop)
|
|
{
|
|
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) + (final_eop ? 1 : 0))
|
|
{
|
|
/* new offset at the end of the text */
|
|
ME_SetCursorToEnd(editor, cursor, final_eop);
|
|
nRelOfs -= new_offset - (ME_GetTextLength(editor) + (final_eop ? 1 : 0));
|
|
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], FALSE);
|
|
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.fmt.dwMask & PFM_TABLEROWDELIMITER);
|
|
assert(para->member.para.fmt.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.
|
|
*
|
|
* If final_eop is TRUE consider the final end-of-paragraph.
|
|
*
|
|
* 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, BOOL final_eop)
|
|
{
|
|
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 && !final_eop)
|
|
{
|
|
/* 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;
|
|
|
|
ME_SetCursorToEnd(editor, result, TRUE);
|
|
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, FALSE);
|
|
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, FALSE);
|
|
|
|
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);
|
|
update_caret(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, TRUE);
|
|
|
|
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);
|
|
update_caret(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, BOOL extend)
|
|
{
|
|
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, TRUE))
|
|
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) /* row not found */
|
|
{
|
|
if (extend)
|
|
ME_SetCursorToStart(editor, pCursor);
|
|
return;
|
|
}
|
|
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) /* row not found */
|
|
{
|
|
if (extend)
|
|
ME_SetCursorToEnd(editor, pCursor, TRUE);
|
|
return;
|
|
}
|
|
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, FALSE);
|
|
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, FALSE);
|
|
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;
|
|
|
|
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;
|
|
|
|
if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
|
|
{
|
|
ME_ClearTempStyle(editor);
|
|
|
|
editor->notified_cr = sc.chrg;
|
|
|
|
if (editor->nEventMask & ENM_SELCHANGE)
|
|
{
|
|
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" : "");
|
|
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, extend);
|
|
break;
|
|
case VK_RIGHT:
|
|
editor->bCaretAtEnd = FALSE;
|
|
if (ctrl)
|
|
success = ME_MoveCursorWords(editor, &tmp_curs, +1);
|
|
else
|
|
success = ME_MoveCursorChars(editor, &tmp_curs, +1, extend);
|
|
break;
|
|
case VK_UP:
|
|
ME_MoveCursorLines(editor, &tmp_curs, -1, extend);
|
|
break;
|
|
case VK_DOWN:
|
|
ME_MoveCursorLines(editor, &tmp_curs, +1, extend);
|
|
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);
|
|
hide_caret(editor);
|
|
ME_EnsureVisible(editor, &tmp_curs);
|
|
update_caret(editor);
|
|
ME_SendSelChange(editor);
|
|
return success;
|
|
}
|