1 /*
2 * RichEdit - Operations on rows of text (rows are recreated during
3 * wrapping and are used for displaying the document, they don't keep any
4 * true document content; delete all rows, rewrap all paragraphs and
5 * you get them back).
6 *
7 * Copyright 2004 by Krzysztof Foltman
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 */
23
24
25 #include "editor.h"
26
27 /* I'm sure these functions would simplify some code in caret ops etc,
28 * I just didn't remember them when I wrote that code
29 */
30
31 ME_DisplayItem *ME_RowStart(ME_DisplayItem *item) {
32 return ME_FindItemBackOrHere(item, diStartRow);
33 }
34
35 /*
36 ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item) {
37 ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
38 if (!item2) return NULL;
39 return ME_FindItemBack(item, diRun);
40 }
41 */
42
43 ME_DisplayItem *
44 ME_FindRowWithNumber(ME_TextEditor *editor, int nRow)
45 {
46 ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
47 int nCount = 0;
48
49 while (item->type == diParagraph &&
50 nCount + item->member.para.nRows <= nRow)
51 {
52 nCount += item->member.para.nRows;
53 item = item->member.para.next_para;
54 }
55 if (item->type != diParagraph)
56 return NULL;
57 for (item = ME_FindItemFwd(item, diStartRow); item && nCount < nRow; nCount++)
58 item = ME_FindItemFwd(item, diStartRow);
59 return item;
60 }
61
62
63 int
64 ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs)
65 {
66 ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
67 int nRow = 0;
68
69 while (item->type == diParagraph &&
70 item->member.para.next_para->member.para.nCharOfs <= nOfs)
71 {
72 nRow += item->member.para.nRows;
73 item = item->member.para.next_para;
74 }
75 if (item->type == diParagraph)
76 {
77 ME_DisplayItem *next_para = item->member.para.next_para;
78
79 nOfs -= item->member.para.nCharOfs;
80 item = ME_FindItemFwd(item, diRun);
81 while ((item = ME_FindItemFwd(item, diStartRowOrParagraph)) != NULL)
82 {
83 if (item == next_para)
84 break;
85 item = ME_FindItemFwd(item, diRun);
86 if (item->member.run.nCharOfs > nOfs)
87 break;
88 nRow++;
89 }
90 }
91 return nRow;
92 }
93
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.