mirror of
git://source.winehq.org/git/wine.git
synced 2024-11-05 18:01:34 +00:00
305 lines
8.6 KiB
C
305 lines
8.6 KiB
C
/*
|
|
* RichEdit - functions dealing with editor object
|
|
*
|
|
* Copyright 2004 by Krzysztof Foltman
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include "editor.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(richedit);
|
|
|
|
void ME_EmptyUndoStack(ME_TextEditor *editor)
|
|
{
|
|
ME_DisplayItem *p, *pNext;
|
|
|
|
if (editor->nUndoMode == umIgnore)
|
|
return;
|
|
|
|
TRACE("Emptying undo stack\n");
|
|
|
|
p = editor->pUndoStack;
|
|
editor->pUndoStack = editor->pUndoStackBottom = NULL;
|
|
editor->nUndoStackSize = 0;
|
|
while(p) {
|
|
pNext = p->next;
|
|
ME_DestroyDisplayItem(p);
|
|
p = pNext;
|
|
}
|
|
p = editor->pRedoStack;
|
|
editor->pRedoStack = NULL;
|
|
while(p) {
|
|
pNext = p->next;
|
|
ME_DestroyDisplayItem(p);
|
|
p = pNext;
|
|
}
|
|
}
|
|
|
|
ME_UndoItem *ME_AddUndoItem(ME_TextEditor *editor, ME_DIType type, const ME_DisplayItem *pdi) {
|
|
if (editor->nUndoMode == umIgnore)
|
|
return NULL;
|
|
else if (editor->nUndoLimit == 0)
|
|
return NULL;
|
|
else
|
|
{
|
|
ME_DisplayItem *pItem = (ME_DisplayItem *)ALLOC_OBJ(ME_UndoItem);
|
|
((ME_UndoItem *)pItem)->nCR = ((ME_UndoItem *)pItem)->nLF = -1;
|
|
switch(type)
|
|
{
|
|
case diUndoEndTransaction:
|
|
break;
|
|
case diUndoSetParagraphFormat:
|
|
assert(pdi);
|
|
pItem->member.para = pdi->member.para;
|
|
pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
|
|
*pItem->member.para.pFmt = *pdi->member.para.pFmt;
|
|
break;
|
|
case diUndoInsertRun:
|
|
assert(pdi);
|
|
pItem->member.run = pdi->member.run;
|
|
pItem->member.run.strText = ME_StrDup(pItem->member.run.strText);
|
|
ME_AddRefStyle(pItem->member.run.style);
|
|
if (pdi->member.run.ole_obj)
|
|
{
|
|
pItem->member.run.ole_obj = ALLOC_OBJ(*pItem->member.run.ole_obj);
|
|
ME_CopyReObject(pItem->member.run.ole_obj, pdi->member.run.ole_obj);
|
|
}
|
|
else pItem->member.run.ole_obj = NULL;
|
|
break;
|
|
case diUndoSetCharFormat:
|
|
case diUndoSetDefaultCharFormat:
|
|
break;
|
|
case diUndoDeleteRun:
|
|
case diUndoJoinParagraphs:
|
|
break;
|
|
case diUndoSplitParagraph:
|
|
pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
|
|
pItem->member.para.pFmt->cbSize = sizeof(PARAFORMAT2);
|
|
pItem->member.para.pFmt->dwMask = 0;
|
|
|
|
break;
|
|
default:
|
|
assert(0 == "AddUndoItem, unsupported item type");
|
|
return NULL;
|
|
}
|
|
pItem->type = type;
|
|
pItem->prev = NULL;
|
|
if (editor->nUndoMode == umAddToUndo || editor->nUndoMode == umAddBackToUndo)
|
|
{
|
|
if (editor->nUndoMode == umAddToUndo)
|
|
TRACE("Pushing id=%s to undo stack, deleting redo stack\n", ME_GetDITypeName(type));
|
|
else
|
|
TRACE("Pushing id=%s to undo stack\n", ME_GetDITypeName(type));
|
|
|
|
pItem->next = editor->pUndoStack;
|
|
if (type == diUndoEndTransaction)
|
|
editor->nUndoStackSize++;
|
|
if (editor->pUndoStack)
|
|
editor->pUndoStack->prev = pItem;
|
|
else
|
|
editor->pUndoStackBottom = pItem;
|
|
editor->pUndoStack = pItem;
|
|
|
|
if (editor->nUndoStackSize > editor->nUndoLimit)
|
|
{ /* remove oldest undo from stack */
|
|
ME_DisplayItem *p = editor->pUndoStackBottom;
|
|
while (p->type !=diUndoEndTransaction)
|
|
p = p->prev; /*find new stack bottom */
|
|
editor->pUndoStackBottom = p->prev;
|
|
editor->pUndoStackBottom->next = NULL;
|
|
do
|
|
{
|
|
ME_DisplayItem *pp = p->next;
|
|
ME_DestroyDisplayItem(p);
|
|
p = pp;
|
|
} while (p);
|
|
editor->nUndoStackSize--;
|
|
}
|
|
/* any new operation (not redo) clears the redo stack */
|
|
if (editor->nUndoMode == umAddToUndo) {
|
|
ME_DisplayItem *p = editor->pRedoStack;
|
|
while(p)
|
|
{
|
|
ME_DisplayItem *pp = p->next;
|
|
ME_DestroyDisplayItem(p);
|
|
p = pp;
|
|
}
|
|
editor->pRedoStack = NULL;
|
|
}
|
|
}
|
|
else if (editor->nUndoMode == umAddToRedo)
|
|
{
|
|
TRACE("Pushing id=%s to redo stack\n", ME_GetDITypeName(type));
|
|
pItem->next = editor->pRedoStack;
|
|
if (editor->pRedoStack)
|
|
editor->pRedoStack->prev = pItem;
|
|
editor->pRedoStack = pItem;
|
|
}
|
|
else
|
|
assert(0);
|
|
return (ME_UndoItem *)pItem;
|
|
}
|
|
}
|
|
|
|
void ME_CommitUndo(ME_TextEditor *editor) {
|
|
if (editor->nUndoMode == umIgnore)
|
|
return;
|
|
|
|
assert(editor->nUndoMode == umAddToUndo);
|
|
|
|
/* no transactions, no need to commit */
|
|
if (!editor->pUndoStack)
|
|
return;
|
|
|
|
/* no need to commit empty transactions */
|
|
if (editor->pUndoStack->type == diUndoEndTransaction)
|
|
return;
|
|
|
|
ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
|
|
ME_SendSelChange(editor);
|
|
}
|
|
|
|
static void ME_PlayUndoItem(ME_TextEditor *editor, ME_DisplayItem *pItem)
|
|
{
|
|
ME_UndoItem *pUItem = (ME_UndoItem *)pItem;
|
|
|
|
if (editor->nUndoMode == umIgnore)
|
|
return;
|
|
TRACE("Playing undo/redo item, id=%s\n", ME_GetDITypeName(pItem->type));
|
|
|
|
switch(pItem->type)
|
|
{
|
|
case diUndoEndTransaction:
|
|
assert(0);
|
|
case diUndoSetParagraphFormat:
|
|
{
|
|
ME_Cursor tmp;
|
|
ME_CursorFromCharOfs(editor, pItem->member.para.nCharOfs, &tmp);
|
|
ME_SetParaFormat(editor, ME_FindItemBack(tmp.pRun, diParagraph), pItem->member.para.pFmt);
|
|
break;
|
|
}
|
|
case diUndoSetCharFormat:
|
|
{
|
|
ME_SetCharFormat(editor, pUItem->nStart, pUItem->nLen, &pItem->member.ustyle->fmt);
|
|
break;
|
|
}
|
|
case diUndoSetDefaultCharFormat:
|
|
{
|
|
ME_SetDefaultCharFormat(editor, &pItem->member.ustyle->fmt);
|
|
break;
|
|
}
|
|
case diUndoInsertRun:
|
|
{
|
|
ME_InsertRun(editor, pItem->member.run.nCharOfs, pItem);
|
|
break;
|
|
}
|
|
case diUndoDeleteRun:
|
|
{
|
|
ME_InternalDeleteText(editor, pUItem->nStart, pUItem->nLen);
|
|
break;
|
|
}
|
|
case diUndoJoinParagraphs:
|
|
{
|
|
ME_Cursor tmp;
|
|
ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
|
|
/* the only thing that's needed is paragraph offset, so no need to split runs */
|
|
ME_JoinParagraphs(editor, ME_GetParagraph(tmp.pRun));
|
|
break;
|
|
}
|
|
case diUndoSplitParagraph:
|
|
{
|
|
ME_Cursor tmp;
|
|
ME_DisplayItem *new_para;
|
|
ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
|
|
if (tmp.nOffset)
|
|
tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
|
|
assert(pUItem->nCR >= 0);
|
|
assert(pUItem->nLF >= 0);
|
|
new_para = ME_SplitParagraph(editor, tmp.pRun, tmp.pRun->member.run.style,
|
|
pUItem->nCR, pUItem->nLF);
|
|
assert(pItem->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
|
|
*new_para->member.para.pFmt = *pItem->member.para.pFmt;
|
|
break;
|
|
}
|
|
default:
|
|
assert(0 == "PlayUndoItem, unexpected type");
|
|
}
|
|
}
|
|
|
|
void ME_Undo(ME_TextEditor *editor) {
|
|
ME_DisplayItem *p;
|
|
ME_UndoMode nMode = editor->nUndoMode;
|
|
|
|
if (editor->nUndoMode == umIgnore)
|
|
return;
|
|
assert(nMode == umAddToUndo || nMode == umIgnore);
|
|
|
|
/* no undo items ? */
|
|
if (!editor->pUndoStack)
|
|
return;
|
|
|
|
/* watch out for uncommitted transactions ! */
|
|
assert(editor->pUndoStack->type == diUndoEndTransaction);
|
|
|
|
editor->nUndoMode = umAddToRedo;
|
|
p = editor->pUndoStack->next;
|
|
ME_DestroyDisplayItem(editor->pUndoStack);
|
|
do {
|
|
ME_DisplayItem *pp = p;
|
|
ME_PlayUndoItem(editor, p);
|
|
p = p->next;
|
|
ME_DestroyDisplayItem(pp);
|
|
} while(p && p->type != diUndoEndTransaction);
|
|
ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
|
|
editor->pUndoStack = p;
|
|
editor->nUndoStackSize--;
|
|
if (p)
|
|
p->prev = NULL;
|
|
editor->nUndoMode = nMode;
|
|
ME_UpdateRepaint(editor);
|
|
}
|
|
|
|
void ME_Redo(ME_TextEditor *editor) {
|
|
ME_DisplayItem *p;
|
|
ME_UndoMode nMode = editor->nUndoMode;
|
|
|
|
assert(nMode == umAddToUndo || nMode == umIgnore);
|
|
|
|
if (editor->nUndoMode == umIgnore)
|
|
return;
|
|
/* no redo items ? */
|
|
if (!editor->pRedoStack)
|
|
return;
|
|
|
|
/* watch out for uncommitted transactions ! */
|
|
assert(editor->pRedoStack->type == diUndoEndTransaction);
|
|
|
|
editor->nUndoMode = umAddBackToUndo;
|
|
p = editor->pRedoStack->next;
|
|
ME_DestroyDisplayItem(editor->pRedoStack);
|
|
do {
|
|
ME_DisplayItem *pp = p;
|
|
ME_PlayUndoItem(editor, p);
|
|
p = p->next;
|
|
ME_DestroyDisplayItem(pp);
|
|
} while(p && p->type != diUndoEndTransaction);
|
|
ME_AddUndoItem(editor, diUndoEndTransaction, NULL);
|
|
editor->pRedoStack = p;
|
|
if (p)
|
|
p->prev = NULL;
|
|
editor->nUndoMode = nMode;
|
|
ME_UpdateRepaint(editor);
|
|
}
|