131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*
|
|
* RichEdit - Operations on rows of text (rows are recreated during
|
|
* wrapping and are used for displaying the document, they don't keep any
|
|
* true document content; delete all rows, rewrap all paragraphs and
|
|
* you get them back).
|
|
*
|
|
* Copyright 2004 by Krzysztof Foltman
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
|
|
#include "editor.h"
|
|
|
|
ME_DisplayItem *ME_FindRowStart(ME_Context *c, ME_DisplayItem *item,
|
|
int nRelPos) {
|
|
ME_DisplayItem *para = ME_GetParagraph(item);
|
|
ME_MustBeWrapped(c, para);
|
|
if(nRelPos>=0) { /* if this or preceding row */
|
|
while(nRelPos<=0) {
|
|
ME_DisplayItem *item2 = ME_FindItemBack(item, diStartRowOrParagraph);
|
|
if (item2->type == diParagraph)
|
|
{
|
|
if (item2->member.para.prev_para == NULL)
|
|
return item;
|
|
/* if skipping to the preceding paragraph, ensure it's wrapped */
|
|
ME_MustBeWrapped(c, item2->member.para.prev_para);
|
|
item = item2;
|
|
continue;
|
|
}
|
|
else if (item2->type == diStartRow)
|
|
{
|
|
nRelPos++;
|
|
if (nRelPos>0)
|
|
return item;
|
|
item = item2;
|
|
continue;
|
|
}
|
|
assert(0 == "bug in FindItemBack(item, diStartRowOrParagraph)");
|
|
item = item2;
|
|
}
|
|
return item;
|
|
}
|
|
while(nRelPos>0) { /* if one of the next rows */
|
|
ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraph);
|
|
if (!item2)
|
|
return item;
|
|
if (item2->type == diParagraph)
|
|
{
|
|
if (item2->member.para.next_para == NULL)
|
|
return item;
|
|
continue;
|
|
}
|
|
item = item2;
|
|
nRelPos--;
|
|
}
|
|
return item;
|
|
}
|
|
|
|
/* I'm sure these functions would simplify some code in caret ops etc,
|
|
* I just didn't remember them when I wrote that code
|
|
*/
|
|
|
|
ME_DisplayItem *ME_RowStart(ME_DisplayItem *item) {
|
|
return ME_FindItemBackOrHere(item, diStartRow);
|
|
}
|
|
|
|
ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item) {
|
|
ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
|
|
if (!item2) return NULL;
|
|
return ME_FindItemBack(item, diRun);
|
|
}
|
|
|
|
|
|
ME_DisplayItem *
|
|
ME_FindRowWithNumber(ME_TextEditor *editor, int nRow)
|
|
{
|
|
ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
|
|
int nCount = 0;
|
|
|
|
while (item && nCount + item->member.para.nRows <= nRow)
|
|
{
|
|
nCount += item->member.para.nRows;
|
|
item = ME_FindItemFwd(item, diParagraph);
|
|
}
|
|
if (!item)
|
|
return item;
|
|
for (item = ME_FindItemFwd(item, diStartRow); item && nCount < nRow; nCount++)
|
|
item = ME_FindItemFwd(item, diStartRow);
|
|
return item;
|
|
}
|
|
|
|
|
|
int
|
|
ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs)
|
|
{
|
|
ME_DisplayItem *item = editor->pBuffer->pFirst->next;
|
|
int nRow = 0;
|
|
|
|
while (item && item->member.para.next_para->member.para.nCharOfs <= nOfs)
|
|
{
|
|
nRow += item->member.para.nRows;
|
|
item = ME_FindItemFwd(item, diParagraph);
|
|
}
|
|
if (item)
|
|
{
|
|
nOfs -= item->member.para.nCharOfs;
|
|
item = ME_FindItemFwd(item, diRun);
|
|
while ((item = ME_FindItemFwd(item, diStartRowOrParagraph)) != NULL)
|
|
{
|
|
item = ME_FindItemFwd(item, diRun);
|
|
if (item->member.run.nCharOfs > nOfs)
|
|
break;
|
|
nRow++;
|
|
}
|
|
}
|
|
return nRow;
|
|
}
|