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);
61 case diUndoEndTransaction:
63 case diUndoSetParagraphFormat:
65 CopyMemory(&pItem->member.para, &pdi->member.para, sizeof(ME_Paragraph));
66 pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
67 CopyMemory(pItem->member.para.pFmt, pdi->member.para.pFmt, sizeof(PARAFORMAT2));
71 CopyMemory(&pItem->member.run, &pdi->member.run, sizeof(ME_Run));
72 pItem->member.run.strText = ME_StrDup(pItem->member.run.strText);
73 ME_AddRefStyle(pItem->member.run.style);
74 if (pdi->member.run.ole_obj)
76 pItem->member.run.ole_obj = ALLOC_OBJ(*pItem->member.run.ole_obj);
77 ME_CopyReObject(pItem->member.run.ole_obj, pdi->member.run.ole_obj);
79 else pItem->member.run.ole_obj = NULL;
81 case diUndoSetCharFormat:
82 case diUndoSetDefaultCharFormat:
85 case diUndoJoinParagraphs:
87 case diUndoSplitParagraph:
88 pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
89 pItem->member.para.pFmt->cbSize = sizeof(PARAFORMAT2);
90 pItem->member.para.pFmt->dwMask = 0;
94 assert(0 == "AddUndoItem, unsupported item type");
99 if (editor->nUndoMode == umAddToUndo || editor->nUndoMode == umAddBackToUndo)
101 if (editor->nUndoMode == umAddToUndo)
102 TRACE("Pushing id=%s to undo stack, deleting redo stack\n", ME_GetDITypeName(type));
104 TRACE("Pushing id=%s to undo stack\n", ME_GetDITypeName(type));
106 pItem->next = editor->pUndoStack;
107 if (type == diUndoEndTransaction)
108 editor->nUndoStackSize++;
109 if (editor->pUndoStack)
110 editor->pUndoStack->prev = pItem;
112 editor->pUndoStackBottom = pItem;
113 editor->pUndoStack = pItem;
115 if (editor->nUndoStackSize > editor->nUndoLimit)
116 { /* remove oldest undo from stack */
117 ME_DisplayItem *p = editor->pUndoStackBottom;
118 while (p->type !=diUndoEndTransaction)
119 p = p->prev; /*find new stack bottom */
120 editor->pUndoStackBottom = p->prev;
121 editor->pUndoStackBottom->next = NULL;
124 ME_DisplayItem *pp = p->next;
125 ME_DestroyDisplayItem(p);
128 editor->nUndoStackSize--;
130 /* any new operation (not redo) clears the redo stack */
131 if (editor->nUndoMode == umAddToUndo) {
132 ME_DisplayItem *p = editor->pRedoStack;
135 ME_DisplayItem *pp = p->next;
136 ME_DestroyDisplayItem(p);
139 editor->pRedoStack = NULL;
142 else if (editor->nUndoMode == umAddToRedo)
144 TRACE("Pushing id=%s to redo stack\n", ME_GetDITypeName(type));
145 pItem->next = editor->pRedoStack;
146 if (editor->pRedoStack)
147 editor->pRedoStack->prev = pItem;
148 editor->pRedoStack = pItem;
152 return (ME_UndoItem *)pItem;
156 void ME_CommitUndo(ME_TextEditor *editor) {
157 if (editor->nUndoMode == umIgnore)
160 assert(editor->nUndoMode == umAddToUndo);
162 /* no transactions, no need to commit */
163 if (!editor->pUndoStack)
166 /* no need to commit empty transactions */
167 if (editor->pUndoStack->type == diUndoEndTransaction)
170 ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
171 ME_SendSelChange(editor);
174 static void ME_PlayUndoItem(ME_TextEditor *editor, ME_DisplayItem *pItem)
176 ME_UndoItem *pUItem = (ME_UndoItem *)pItem;
178 if (editor->nUndoMode == umIgnore)
180 TRACE("Playing undo/redo item, id=%s\n", ME_GetDITypeName(pItem->type));
184 case diUndoEndTransaction:
186 case diUndoSetParagraphFormat:
189 ME_CursorFromCharOfs(editor, pItem->member.para.nCharOfs, &tmp);
190 ME_SetParaFormat(editor, ME_FindItemBack(tmp.pRun, diParagraph), pItem->member.para.pFmt);
193 case diUndoSetCharFormat:
195 ME_SetCharFormat(editor, pUItem->nStart, pUItem->nLen, &pItem->member.ustyle->fmt);
198 case diUndoSetDefaultCharFormat:
200 ME_SetDefaultCharFormat(editor, &pItem->member.ustyle->fmt);
203 case diUndoInsertRun:
205 ME_InsertRun(editor, pItem->member.run.nCharOfs, pItem);
208 case diUndoDeleteRun:
210 ME_InternalDeleteText(editor, pUItem->nStart, pUItem->nLen);
213 case diUndoJoinParagraphs:
216 ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
217 /* the only thing that's needed is paragraph offset, so no need to split runs */
218 ME_JoinParagraphs(editor, ME_GetParagraph(tmp.pRun));
221 case diUndoSplitParagraph:
224 ME_DisplayItem *new_para;
225 ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
227 tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
228 new_para = ME_SplitParagraph(editor, tmp.pRun, tmp.pRun->member.run.style);
229 assert(pItem->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
230 CopyMemory(new_para->member.para.pFmt, pItem->member.para.pFmt, sizeof(PARAFORMAT2));
234 assert(0 == "PlayUndoItem, unexpected type");
238 void ME_Undo(ME_TextEditor *editor) {
240 ME_UndoMode nMode = editor->nUndoMode;
242 if (editor->nUndoMode == umIgnore)
244 assert(nMode == umAddToUndo || nMode == umIgnore);
246 /* no undo items ? */
247 if (!editor->pUndoStack)
250 /* watch out for uncommited transactions ! */
251 assert(editor->pUndoStack->type == diUndoEndTransaction);
253 editor->nUndoMode = umAddToRedo;
254 p = editor->pUndoStack->next;
255 ME_DestroyDisplayItem(editor->pUndoStack);
257 ME_DisplayItem *pp = p;
258 ME_PlayUndoItem(editor, p);
260 ME_DestroyDisplayItem(pp);
261 } while(p && p->type != diUndoEndTransaction);
262 ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
263 editor->pUndoStack = p;
264 editor->nUndoStackSize--;
267 editor->nUndoMode = nMode;
268 ME_UpdateRepaint(editor);
271 void ME_Redo(ME_TextEditor *editor) {
273 ME_UndoMode nMode = editor->nUndoMode;
275 assert(nMode == umAddToUndo || nMode == umIgnore);
277 if (editor->nUndoMode == umIgnore)
279 /* no redo items ? */
280 if (!editor->pRedoStack)
283 /* watch out for uncommited transactions ! */
284 assert(editor->pRedoStack->type == diUndoEndTransaction);
286 editor->nUndoMode = umAddBackToUndo;
287 p = editor->pRedoStack->next;
288 ME_DestroyDisplayItem(editor->pRedoStack);
290 ME_DisplayItem *pp = p;
291 ME_PlayUndoItem(editor, p);
293 ME_DestroyDisplayItem(pp);
294 } while(p && p->type != diUndoEndTransaction);
295 ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
296 editor->pRedoStack = p;
299 editor->nUndoMode = nMode;
300 ME_UpdateRepaint(editor);