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)");
55 while(nRelPos>0) { /* if one of the next rows */
56 ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraph);
59 if (item2->type == diParagraph)
61 if (item2->member.para.next_para == NULL)
71 /* I'm sure these functions would simplify some code in caret ops etc,
72 * I just didn't remember them when I wrote that code
75 ME_DisplayItem *ME_RowStart(ME_DisplayItem *item) {
76 return ME_FindItemBackOrHere(item, diStartRow);
80 ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item) {
81 ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
82 if (!item2) return NULL;
83 return ME_FindItemBack(item, diRun);
88 ME_FindRowWithNumber(ME_TextEditor *editor, int nRow)
90 ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
93 while (item && nCount + item->member.para.nRows <= nRow)
95 nCount += item->member.para.nRows;
96 item = ME_FindItemFwd(item, diParagraph);
100 for (item = ME_FindItemFwd(item, diStartRow); item && nCount < nRow; nCount++)
101 item = ME_FindItemFwd(item, diStartRow);
107 ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs)
109 ME_DisplayItem *item = editor->pBuffer->pFirst->next;
112 while (item && item->member.para.next_para->member.para.nCharOfs <= nOfs)
114 nRow += item->member.para.nRows;
115 item = ME_FindItemFwd(item, diParagraph);
119 ME_DisplayItem *next_para = item->member.para.next_para;
121 nOfs -= item->member.para.nCharOfs;
122 item = ME_FindItemFwd(item, diRun);
123 while ((item = ME_FindItemFwd(item, diStartRowOrParagraph)) != NULL)
125 if (item == next_para)
127 item = ME_FindItemFwd(item, diRun);
128 if (item->member.run.nCharOfs > nOfs)