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
7 * Copyright 2004 by Krzysztof Foltman
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.
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.
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
27 ME_DisplayItem *ME_FindRowStart(ME_Context *c, ME_DisplayItem *item,
29 ME_DisplayItem *para = ME_GetParagraph(item);
30 ME_MustBeWrapped(c, para);
31 if(nRelPos>=0) { /* if this or preceding row */
33 ME_DisplayItem *item2 = ME_FindItemBack(item, diStartRowOrParagraph);
34 if (item2->type == diParagraph)
36 if (item2->member.para.prev_para == NULL)
38 /* if skipping to the preceding paragraph, ensure it's wrapped */
39 ME_MustBeWrapped(c, item2->member.para.prev_para);
43 else if (item2->type == diStartRow)
51 assert(0 == "bug in FindItemBack(item, diStartRowOrParagraph)");
56 while(nRelPos>0) { /* if one of the next rows */
57 ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraph);
60 if (item2->type == diParagraph)
62 if (item2->member.para.next_para == NULL)
72 /* I'm sure these functions would simplify some code in caret ops etc,
73 * I just didn't remember them when I wrote that code
76 ME_DisplayItem *ME_RowStart(ME_DisplayItem *item) {
77 return ME_FindItemBackOrHere(item, diStartRow);
81 ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item) {
82 ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
83 if (!item2) return NULL;
84 return ME_FindItemBack(item, diRun);
89 ME_FindRowWithNumber(ME_TextEditor *editor, int nRow)
91 ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
94 while (item && nCount + item->member.para.nRows <= nRow)
96 nCount += item->member.para.nRows;
97 item = ME_FindItemFwd(item, diParagraph);
101 for (item = ME_FindItemFwd(item, diStartRow); item && nCount < nRow; nCount++)
102 item = ME_FindItemFwd(item, diStartRow);
108 ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs)
110 ME_DisplayItem *item = editor->pBuffer->pFirst->next;
113 while (item && item->member.para.next_para->member.para.nCharOfs <= nOfs)
115 nRow += item->member.para.nRows;
116 item = ME_FindItemFwd(item, diParagraph);
120 ME_DisplayItem *next_para = item->member.para.next_para;
122 nOfs -= item->member.para.nCharOfs;
123 item = ME_FindItemFwd(item, diRun);
124 while ((item = ME_FindItemFwd(item, diStartRowOrParagraph)) != NULL)
126 if (item == next_para)
128 item = ME_FindItemFwd(item, diRun);
129 if (item->member.run.nCharOfs > nOfs)