private int GetActionAffectFirst(HCCustomUndoAction aAction, bool aIsUndo)
{
int Result = aAction.ItemNo;
switch (aAction.Tag)
{
case UndoActionTag.uatDeleteItem:
{
if (Result > 0)
{
Result--;
}
}
break;
case UndoActionTag.uatInsertItem:
{
if (aIsUndo)
{
if (Result > 0)
{
Result--;
}
}
else
{
if (Result > Items.Count - 1)
{
Result--;
}
}
}
break;
case UndoActionTag.uatItemProperty:
if (aAction.Tag == UndoActionTag.uatItemProperty)
{
HCItemPropertyUndoAction vPropAction = aAction as HCItemPropertyUndoAction;
if (vPropAction.ItemProperty == ItemProperty.uipParaFirst)
{
if (Result > 0)
{
Result--;
}
}
}
break;
default:
{
if (Result > Items.Count - 1)
{
Result = Items.Count - 1;
}
}
break;
}
return(Result);
}
private int GetActionAffectFirst(HCCustomUndoAction aAction, bool aIsUndo)
{
int Result = aAction.ItemNo;
switch (aAction.Tag)
{
case HCAction.actDeleteItem:
{
if (Result > 0)
{
Result--;
}
}
break;
case HCAction.actInsertItem:
{
if (aIsUndo)
{
if (Result > 0)
{
Result--;
}
}
else
{
if (Result > Items.Count - 1)
{
Result--;
}
}
}
break;
case HCAction.actItemProperty:
HCItemPropertyUndoAction vPropAction = aAction as HCItemPropertyUndoAction;
if ((vPropAction.ItemProperty == ItemProperty.uipParaFirst) ||
(vPropAction.ItemProperty == ItemProperty.uipPageBreak) ||
(vPropAction.ItemProperty == ItemProperty.uipStyleNo)
)
{
if (Result > 0)
{
Result--;
}
}
break;
}
if (Result > Items.Count - 1)
{
Result = Items.Count - 1;
}
return(Result);
}
private int GetActionAffectLast(HCCustomUndoAction aAction, bool aIsUndo)
{
int Result = aAction.ItemNo;
switch (aAction.Tag)
{
case UndoActionTag.uatDeleteItem:
if (aIsUndo)
{
if (Result > 0)
{
Result--;
}
}
else
{
if (Result < Items.Count - 1)
{
Result++;
}
}
break;
case UndoActionTag.uatInsertItem:
if (aIsUndo)
{
if ((Result < Items.Count - 1) && aAction.ParaFirst)
{
Result++;
}
}
else
{
if (Result > Items.Count - 1)
{
Result--;
}
}
break;
default:
if (Result > Items.Count - 1)
{
Result = Items.Count - 1;
}
break;
}
return(Result);
}
private void UndoRedoItemProperty(HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset)
{
HCItemPropertyUndoAction vAction = aAction as HCItemPropertyUndoAction;
aCaretItemNo = vAction.ItemNo;
aCaretOffset = vAction.Offset;
HCCustomItem vItem = Items[vAction.ItemNo];
switch (vAction.ItemProperty)
{
case ItemProperty.uipStyleNo:
{
if (aIsUndo)
{
vItem.StyleNo = (vAction as HCItemStyleUndoAction).OldStyleNo;
}
else
{
vItem.StyleNo = (vAction as HCItemStyleUndoAction).NewStyleNo;
}
}
break;
case ItemProperty.uipParaNo:
{
if (aIsUndo)
{
vItem.ParaNo = (vAction as HCItemParaUndoAction).OldParaNo;
}
else
{
vItem.ParaNo = (vAction as HCItemParaUndoAction).NewParaNo;
}
}
break;
case ItemProperty.uipParaFirst:
{
if (aIsUndo)
{
vItem.ParaFirst = (vAction as HCItemParaFirstUndoAction).OldParaFirst;
}
else
{
vItem.ParaFirst = (vAction as HCItemParaFirstUndoAction).NewParaFirst;
}
}
break;
}
}
private void UndoRedoItemSelf(HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset)
{
HCItemSelfUndoAction vAction = aAction as HCItemSelfUndoAction;
aCaretItemNo = vAction.ItemNo;
aCaretOffset = vAction.Offset;
if (aIsUndo)
{
Items[aCaretItemNo].Undo(vAction);
}
else
{
Items[aCaretItemNo].Redo(vAction);
}
}
private void UndoRedoInsertItem(HCCustomUndo aUndo, HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset, ref int aCaretDrawItemNo)
{
HCItemUndoAction vAction = aAction as HCItemUndoAction;
aCaretItemNo = vAction.ItemNo;
if (aIsUndo)
{
Items.RemoveAt(vAction.ItemNo);
FItemAddCount--;
if (aCaretItemNo > 0)
{
aCaretItemNo--;
if (Items[aCaretItemNo].StyleNo > HCStyle.Null)
{
aCaretOffset = Items[aCaretItemNo].Length;
}
else
{
aCaretOffset = HC.OffsetAfter;
}
}
else
{
aCaretOffset = 0;
}
}
else // 重做
{
HCCustomItem vItem = null;
LoadItemFromStreamAlone(vAction.ItemStream, ref vItem);
Items.Insert(vAction.ItemNo, vItem);
FItemAddCount++;
aCaretItemNo = vAction.ItemNo;
if (Items[aCaretItemNo].StyleNo > HCStyle.Null)
{
aCaretOffset = Items[aCaretItemNo].Length;
}
else
{
aCaretOffset = HC.OffsetAfter;
}
aCaretDrawItemNo = (aUndo as HCDataUndo).CaretDrawItemNo + 1;
}
}
private void UndoRedoSetItemText(HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset)
{
HCSetItemTextUndoAction vAction = aAction as HCSetItemTextUndoAction;
aCaretItemNo = vAction.ItemNo;
if (aIsUndo)
{
Items[vAction.ItemNo].Text = vAction.Text;
aCaretOffset = vAction.Offset;
}
else
{
Items[vAction.ItemNo].Text = vAction.NewText;
aCaretOffset = vAction.NewText.Length;
}
}
private void UndoRedoItemMirror(HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset)
{
HCItemUndoAction vAction = aAction as HCItemUndoAction;
aCaretItemNo = vAction.ItemNo;
aCaretOffset = vAction.Offset;
HCCustomItem vItem = Items[aCaretItemNo];
if (aIsUndo)
{
LoadItemFromStreamAlone(vAction.ItemStream, ref vItem);
}
else
{
LoadItemFromStreamAlone(vAction.ItemStream, ref vItem);
}
}
public HCCustomUndoAction ActionAppend(HCAction aTag, int aItemNo, int aOffset, bool aParaFirst)
{
HCCustomUndoAction Result = null;
switch (aTag)
{
case HCAction.actBackDeleteText:
case HCAction.actDeleteText:
case HCAction.actInsertText:
Result = new HCTextUndoAction();
break;
case HCAction.actSetItemText:
Result = new HCSetItemTextUndoAction();
break;
case HCAction.actDeleteItem:
case HCAction.actInsertItem:
case HCAction.actItemMirror:
Result = new HCItemUndoAction();
break;
//case HCAction.actItemProperty:
// Result = new HCItemParaFirstUndoAction();
// break;
case HCAction.actItemSelf:
Result = new HCItemSelfUndoAction();
break;
default:
Result = new HCCustomUndoAction();
break;
}
Result.Tag = aTag;
Result.ItemNo = aItemNo;
Result.Offset = aOffset;
Result.ParaFirst = aParaFirst;
this.Actions.Add(Result);
return(Result);
}
// 撤销重做相关方法
public override void Undo(HCCustomUndoAction aUndoAction)
{
if (aUndoAction is HCItemSelfUndoAction)
{
HCUndoList vUndoList = (aUndoAction as HCItemSelfUndoAction).Object as HCUndoList;
if (vUndoList != null)
{
vUndoList.Undo();
}
else
{
base.Undo(aUndoAction);
}
}
else
{
base.Undo(aUndoAction);
}
}
private void UndoRedoDeleteText(HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset)
{
HCTextUndoAction vAction = aAction as HCTextUndoAction;
aCaretItemNo = vAction.ItemNo;
int vLen = vAction.Text.Length;
string vText = Items[vAction.ItemNo].Text;
if (aIsUndo)
{
vText = vText.Insert(vAction.Offset - 1, vAction.Text);
}
else
{
vText = vText.Remove(vAction.Offset - 1, vLen);
}
aCaretOffset = vAction.Offset - 1;
Items[vAction.ItemNo].Text = vText;
}
private void DoUndoRedoAction(HCCustomUndo aUndo, HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset, ref int aCaretDrawItemNo)
{
switch (aAction.Tag)
{
case HCAction.actBackDeleteText:
UndoRedoDeleteBackText(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actDeleteText:
UndoRedoDeleteText(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actInsertText:
UndoRedoInsertText(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actSetItemText:
UndoRedoSetItemText(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actDeleteItem:
UndoRedoDeleteItem(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actInsertItem:
UndoRedoInsertItem(aUndo, aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset, ref aCaretDrawItemNo);
break;
case HCAction.actItemProperty:
UndoRedoItemProperty(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actItemSelf:
UndoRedoItemSelf(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
case HCAction.actItemMirror:
UndoRedoItemMirror(aAction, aIsUndo, ref aCaretItemNo, ref aCaretOffset);
break;
}
}
protected HCUndoList GetSelfUndoList()
{
HCUndoList Result = null;
HCUndoList vMainUndoList = FOnGetMainUndoList();
int vActionCount = vMainUndoList[vMainUndoList.Count - 1].Actions.Count;
HCCustomUndoAction vLastAction = vMainUndoList[vMainUndoList.Count - 1].Actions[vActionCount - 1];
if (vLastAction is HCItemSelfUndoAction)
{
HCItemSelfUndoAction vItemAction = vLastAction as HCItemSelfUndoAction;
if (vItemAction.Object == null)
{
vItemAction.Object = new HCUndoList();
(vItemAction.Object as HCUndoList).OnNewUndo = DoNewUndo;
(vItemAction.Object as HCUndoList).OnUndo = DoUndo;
(vItemAction.Object as HCUndoList).OnRedo = DoRedo;
}
Result = vItemAction.Object as HCUndoList;
}
return(Result);
}
public HCCustomUndoAction ActionAppend(UndoActionTag ATag, int AItemNo, int AOffset)
{
HCCustomUndoAction Result = null;
switch (ATag)
{
case UndoActionTag.uatDeleteText:
case UndoActionTag.uatInsertText:
Result = new HCTextUndoAction();
break;
case UndoActionTag.uatDeleteItem:
case UndoActionTag.uatInsertItem:
Result = new HCItemUndoAction();
break;
case UndoActionTag.uatItemProperty:
Result = new HCItemParaFirstUndoAction();
break;
case UndoActionTag.uatItemSelf:
Result = new HCItemSelfUndoAction();
break;
default:
Result = new HCCustomUndoAction();
break;
}
Result.Tag = ATag;
Result.ItemNo = AItemNo;
Result.Offset = AOffset;
this.Actions.Add(Result);
return(Result);
}
public override void Redo(HCCustomUndoAction aRedoAction)
{
if (aRedoAction is HCItemSelfUndoAction)
{
HCUndoList vUndoList = (aRedoAction as HCItemSelfUndoAction).Object as HCUndoList;
if (vUndoList != null)
{
if (vUndoList.Seek < 0)
{
SelfUndoListInitializate(vUndoList);
}
vUndoList.Redo();
}
else
{
base.Redo(aRedoAction);
}
}
else
{
base.Redo(aRedoAction);
}
}
private void UndoRedoItemProperty(HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset)
{
HCItemPropertyUndoAction vAction = aAction as HCItemPropertyUndoAction;
aCaretItemNo = vAction.ItemNo;
aCaretOffset = vAction.Offset;
HCCustomItem vItem = Items[vAction.ItemNo];
switch (vAction.ItemProperty)
{
case ItemProperty.uipStyleNo:
{
if (aIsUndo)
{
vItem.StyleNo = (vAction as HCItemStyleUndoAction).OldStyleNo;
}
else
{
vItem.StyleNo = (vAction as HCItemStyleUndoAction).NewStyleNo;
}
}
break;
case ItemProperty.uipParaNo:
{
int vParaLastItemNo = GetParaLastItemNo(vAction.ItemNo);
if (aIsUndo)
{
for (int i = vAction.ItemNo; i <= vParaLastItemNo; i++)
{
Items[i].ParaNo = (vAction as HCItemParaUndoAction).OldParaNo;
}
}
else
{
for (int i = vAction.ItemNo; i <= vParaLastItemNo; i++)
{
Items[i].ParaNo = (vAction as HCItemParaUndoAction).NewParaNo;
}
}
}
break;
case ItemProperty.uipParaFirst:
{
if (aIsUndo)
{
vItem.ParaFirst = (vAction as HCItemParaFirstUndoAction).OldParaFirst;
}
else
{
vItem.ParaFirst = (vAction as HCItemParaFirstUndoAction).NewParaFirst;
}
}
break;
case ItemProperty.uipPageBreak:
{
FForceClearExtra = true;
if (aIsUndo)
{
vItem.PageBreak = (vAction as HCItemPageBreakUndoAction).OldPageBreak;
}
else
{
vItem.PageBreak = (vAction as HCItemPageBreakUndoAction).NewPageBreak;
}
}
break;
}
}
private void UndoRedoInsertItem(HCCustomUndo aUndo, HCCustomUndoAction aAction, bool aIsUndo, ref int aCaretItemNo, ref int aCaretOffset, ref int aCaretDrawItemNo)
{
HCItemUndoAction vAction = aAction as HCItemUndoAction;
aCaretItemNo = vAction.ItemNo;
if (aIsUndo)
{
if (aCaretItemNo < Items.Count - 1) // 不是最后一个
{
if (Items[aCaretItemNo].ParaFirst) // 段首删除了，光标为下一个开始
{
aCaretOffset = 0;
aCaretDrawItemNo = Items[aCaretItemNo + 1].FirstDItemNo;
}
else // 删除的不是段首
//if (Items[aCaretItemNo + 1].ParaFirst) // 下一个是段首，光标保持在同段最后
{
aCaretItemNo--;
if (Items[aCaretItemNo].StyleNo > HCStyle.Null)
{
aCaretOffset = Items[aCaretItemNo].Length;
}
else
{
aCaretOffset = HC.OffsetAfter;
}
aCaretDrawItemNo = (aUndo as HCDataUndo).CaretDrawItemNo;// - 1;
}
}
else
if (aCaretItemNo > 0) // 不是第一个
{
aCaretItemNo--;
if (Items[aCaretItemNo].StyleNo > HCStyle.Null)
{
aCaretOffset = Items[aCaretItemNo].Length;
}
else
{
aCaretOffset = HC.OffsetAfter;
}
aCaretDrawItemNo = (aUndo as HCDataUndo).CaretDrawItemNo - 1;
}
else
{
aCaretOffset = 0;
}
Items.RemoveAt(vAction.ItemNo);
FItemAddCount--;
}
else // 重做
{
HCCustomItem vItem = null;
LoadItemFromStreamAlone(vAction.ItemStream, ref vItem);
Items.Insert(vAction.ItemNo, vItem);
FItemAddCount++;
aCaretItemNo = vAction.ItemNo;
if (Items[aCaretItemNo].StyleNo > HCStyle.Null)
{
aCaretOffset = Items[aCaretItemNo].Length;
}
else
{
aCaretOffset = HC.OffsetAfter;
}
aCaretDrawItemNo = (aUndo as HCDataUndo).CaretDrawItemNo + 1;
}
}
public virtual void Redo(HCCustomUndoAction aRedoAction)
{
}
// 撤销重做相关方法
public virtual void Undo(HCCustomUndoAction aUndoAction)
{
}