2 * RichEdit - functions dealing with editor object
4 * Copyright 2004 by Krzysztof Foltman
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
25 void ME_EmptyUndoStack(ME_TextEditor *editor)
27 ME_DisplayItem *p, *pNext;
29 if (editor->nUndoMode == umIgnore)
32 TRACE("Emptying undo stack\n");
34 p = editor->pUndoStack;
35 editor->pUndoStack = editor->pUndoStackBottom = NULL;
36 editor->nUndoStackSize = 0;
39 ME_DestroyDisplayItem(p);
42 p = editor->pRedoStack;
43 editor->pRedoStack = NULL;
46 ME_DestroyDisplayItem(p);
51 ME_UndoItem *ME_AddUndoItem(ME_TextEditor *editor, ME_DIType type, const ME_DisplayItem *pdi) {
52 if (editor->nUndoMode == umIgnore)
54 else if (editor->nUndoLimit == 0)
58 ME_DisplayItem *pItem = (ME_DisplayItem *)ALLOC_OBJ(ME_UndoItem);
59 ((ME_UndoItem *)pItem)->nCR = ((ME_UndoItem *)pItem)->nLF = -1;
62 case diUndoEndTransaction:
64 case diUndoSetParagraphFormat:
66 pItem->member.para = pdi->member.para;
67 pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
68 *pItem->member.para.pFmt = *pdi->member.para.pFmt;
72 pItem->member.run = pdi->member.run;
73 pItem->member.run.strText = ME_StrDup(pItem->member.run.strText);
74 ME_AddRefStyle(pItem->member.run.style);
75 if (pdi->member.run.ole_obj)
77 pItem->member.run.ole_obj = ALLOC_OBJ(*pItem->member.run.ole_obj);
78 ME_CopyReObject(pItem->member.run.ole_obj, pdi->member.run.ole_obj);
80 else pItem->member.run.ole_obj = NULL;
82 case diUndoSetCharFormat:
83 case diUndoSetDefaultCharFormat:
86 case diUndoJoinParagraphs:
88 case diUndoSplitParagraph:
89 pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
90 pItem->member.para.pFmt->cbSize = sizeof(PARAFORMAT2);
91 pItem->member.para.pFmt->dwMask = 0;
95 assert(0 == "AddUndoItem, unsupported item type");
100 if (editor->nUndoMode == umAddToUndo || editor->nUndoMode == umAddBackToUndo)
102 if (editor->nUndoMode == umAddToUndo)
103 TRACE("Pushing id=%s to undo stack, deleting redo stack\n", ME_GetDITypeName(type));
105 TRACE("Pushing id=%s to undo stack\n", ME_GetDITypeName(type));
107 pItem->next = editor->pUndoStack;
108 if (type == diUndoEndTransaction)
109 editor->nUndoStackSize++;
110 if (editor->pUndoStack)
111 editor->pUndoStack->prev = pItem;
113 editor->pUndoStackBottom = pItem;
114 editor->pUndoStack = pItem;
116 if (editor->nUndoStackSize > editor->nUndoLimit)
117 { /* remove oldest undo from stack */
118 ME_DisplayItem *p = editor->pUndoStackBottom;
119 while (p->type !=diUndoEndTransaction)
120 p = p->prev; /*find new stack bottom */
121 editor->pUndoStackBottom = p->prev;
122 editor->pUndoStackBottom->next = NULL;
125 ME_DisplayItem *pp = p->next;
126 ME_DestroyDisplayItem(p);
129 editor->nUndoStackSize--;
131 /* any new operation (not redo) clears the redo stack */
132 if (editor->nUndoMode == umAddToUndo) {
133 ME_DisplayItem *p = editor->pRedoStack;
136 ME_DisplayItem *pp = p->next;
137 ME_DestroyDisplayItem(p);
140 editor->pRedoStack = NULL;
143 else if (editor->nUndoMode == umAddToRedo)
145 TRACE("Pushing id=%s to redo stack\n", ME_GetDITypeName(type));
146 pItem->next = editor->pRedoStack;
147 if (editor->pRedoStack)
148 editor->pRedoStack->prev = pItem;
149 editor->pRedoStack = pItem;
153 return (ME_UndoItem *)pItem;
157 void ME_CommitUndo(ME_TextEditor *editor) {
158 if (editor->nUndoMode == umIgnore)
161 assert(editor->nUndoMode == umAddToUndo);
163 /* no transactions, no need to commit */
164 if (!editor->pUndoStack)
167 /* no need to commit empty transactions */
168 if (editor->pUndoStack->type == diUndoEndTransaction)
171 ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
172 ME_SendSelChange(editor);
175 static void ME_PlayUndoItem(ME_TextEditor *editor, ME_DisplayItem *pItem)
177 ME_UndoItem *pUItem = (ME_UndoItem *)pItem;
179 if (editor->nUndoMode == umIgnore)
181 TRACE("Playing undo/redo item, id=%s\n", ME_GetDITypeName(pItem->type));
185 case diUndoEndTransaction:
187 case diUndoSetParagraphFormat:
190 ME_CursorFromCharOfs(editor, pItem->member.para.nCharOfs, &tmp);
191 ME_SetParaFormat(editor, ME_FindItemBack(tmp.pRun, diParagraph), pItem->member.para.pFmt);
194 case diUndoSetCharFormat:
196 ME_SetCharFormat(editor, pUItem->nStart, pUItem->nLen, &pItem->member.ustyle->fmt);
199 case diUndoSetDefaultCharFormat:
201 ME_SetDefaultCharFormat(editor, &pItem->member.ustyle->fmt);
204 case diUndoInsertRun:
206 ME_InsertRun(editor, pItem->member.run.nCharOfs, pItem);
209 case diUndoDeleteRun:
211 ME_InternalDeleteText(editor, pUItem->nStart, pUItem->nLen);
214 case diUndoJoinParagraphs:
217 ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
218 /* the only thing that's needed is paragraph offset, so no need to split runs */
219 ME_JoinParagraphs(editor, ME_GetParagraph(tmp.pRun));
222 case diUndoSplitParagraph:
225 ME_DisplayItem *new_para;
226 ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
228 tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
229 assert(pUItem->nCR >= 0);
230 assert(pUItem->nLF >= 0);
231 new_para = ME_SplitParagraph(editor, tmp.pRun, tmp.pRun->member.run.style,
232 pUItem->nCR, pUItem->nLF);
233 assert(pItem->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
234 *new_para->member.para.pFmt = *pItem->member.para.pFmt;
238 assert(0 == "PlayUndoItem, unexpected type");
242 void ME_Undo(ME_TextEditor *editor) {
244 ME_UndoMode nMode = editor->nUndoMode;
246 if (editor->nUndoMode == umIgnore)
248 assert(nMode == umAddToUndo || nMode == umIgnore);
250 /* no undo items ? */
251 if (!editor->pUndoStack)
254 /* watch out for uncommitted transactions ! */
255 assert(editor->pUndoStack->type == diUndoEndTransaction);
257 editor->nUndoMode = umAddToRedo;
258 p = editor->pUndoStack->next;
259 ME_DestroyDisplayItem(editor->pUndoStack);
261 ME_DisplayItem *pp = p;
262 ME_PlayUndoItem(editor, p);
264 ME_DestroyDisplayItem(pp);
265 } while(p && p->type != diUndoEndTransaction);
266 ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
267 editor->pUndoStack = p;
268 editor->nUndoStackSize--;
271 editor->nUndoMode = nMode;
272 ME_UpdateRepaint(editor);
275 void ME_Redo(ME_TextEditor *editor) {
277 ME_UndoMode nMode = editor->nUndoMode;
279 assert(nMode == umAddToUndo || nMode == umIgnore);
281 if (editor->nUndoMode == umIgnore)
283 /* no redo items ? */
284 if (!editor->pRedoStack)
287 /* watch out for uncommitted transactions ! */
288 assert(editor->pRedoStack->type == diUndoEndTransaction);
290 editor->nUndoMode = umAddBackToUndo;
291 p = editor->pRedoStack->next;
292 ME_DestroyDisplayItem(editor->pRedoStack);
294 ME_DisplayItem *pp = p;
295 ME_PlayUndoItem(editor, p);
297 ME_DestroyDisplayItem(pp);
298 } while(p && p->type != diUndoEndTransaction);
299 ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
300 editor->pRedoStack = p;
303 editor->nUndoMode = nMode;
304 ME_UpdateRepaint(editor);