156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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* RichEdit - Operations on rows of text (rows are recreated during
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* wrapping and are used for displaying the document, they don't keep any
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* true document content; delete all rows, rewrap all paragraphs and
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* you get them back).
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*
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* Copyright 2004 by Krzysztof Foltman
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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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ME_Row *row_next( ME_Row *row )
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{
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ME_DisplayItem *item;
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item = ME_FindItemFwd( row_get_di( row ), diStartRowOrParagraphOrEnd );
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if (!item || item->type != diStartRow) return NULL;
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return &item->member.row;
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}
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ME_Row *row_next_all_paras( ME_Row *row )
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{
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ME_DisplayItem *item;
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item = ME_FindItemFwd( row_get_di( row ), diStartRow );
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if (!item) return NULL;
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return &item->member.row;
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}
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ME_Row *row_prev_all_paras( ME_Row *row )
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{
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ME_DisplayItem *item;
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item = ME_FindItemBack( row_get_di( row ), diStartRow );
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if (!item) return NULL;
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return &item->member.row;
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}
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ME_Run *row_first_run( ME_Row *row )
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{
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ME_DisplayItem *item;
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item = ME_FindItemFwd( row_get_di( row ), diRunOrStartRow );
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assert( item->type == diRun );
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return &item->member.run;
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}
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ME_Run *row_next_run( ME_Row *row, ME_Run *run )
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{
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ME_DisplayItem *item;
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assert( row == &ME_FindItemBack( run_get_di( run ), diStartRow )->member.row );
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item = ME_FindItemFwd( run_get_di( run ), diRunOrStartRow );
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if (!item || item->type == diStartRow) return NULL;
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return &item->member.run;
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}
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ME_Row *row_from_cursor( ME_Cursor *cursor )
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{
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ME_DisplayItem *item;
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item = ME_FindItemBack( run_get_di( cursor->run ), diStartRow );
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return &item->member.row;
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}
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void row_first_cursor( ME_Row *row, ME_Cursor *cursor )
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{
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ME_DisplayItem *item;
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item = ME_FindItemFwd( row_get_di( row ), diRun );
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cursor->run = &item->member.run;
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cursor->para = cursor->run->para;
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cursor->nOffset = 0;
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}
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void row_end_cursor( ME_Row *row, ME_Cursor *cursor, BOOL include_eop )
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{
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ME_DisplayItem *item, *run;
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item = ME_FindItemFwd( row_get_di( row ), diStartRowOrParagraphOrEnd );
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run = ME_FindItemBack( item, diRun );
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cursor->run = &run->member.run;
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cursor->para = cursor->run->para;
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cursor->nOffset = (item->type == diStartRow || include_eop) ? cursor->run->len : 0;
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}
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ME_Paragraph *row_para( ME_Row *row )
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{
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ME_Cursor cursor;
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row_first_cursor( row, &cursor );
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return cursor.para;
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}
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ME_Row *row_from_row_number( ME_TextEditor *editor, int row_num )
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{
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ME_Paragraph *para = editor_first_para( editor );
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ME_Row *row;
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int count = 0;
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while (para_next( para ) && count + para->nRows <= row_num)
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{
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count += para->nRows;
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para = para_next( para );
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}
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if (!para_next( para )) return NULL;
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for (row = para_first_row( para ); row && count < row_num; count++)
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row = row_next( row );
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return row;
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}
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int row_number_from_char_ofs( ME_TextEditor *editor, int ofs )
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{
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ME_Paragraph *para = editor_first_para( editor );
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ME_Row *row;
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ME_Cursor cursor;
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int row_num = 0;
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while (para_next( para ) && para_next( para )->nCharOfs <= ofs)
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{
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row_num += para->nRows;
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para = para_next( para );
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}
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if (para_next( para ))
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{
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for (row = para_first_row( para ); row; row = row_next( row ))
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{
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row_end_cursor( row, &cursor, TRUE );
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if (ME_GetCursorOfs( &cursor ) > ofs ) break;
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row_num++;
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}
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}
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return row_num;
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}
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