/// <summary> 插入Item到指定位置 </summary>
/// <param name="AItemNo">操作发生时的ItemNo</param>
/// <param name="AOffset">操作发生时的Offset</param>
protected void UndoAction_InsertItem(int aItemNo, int aOffset)
{
HCUndoList vUndoList = GetUndoList();
if ((vUndoList != null) && vUndoList.Enable)
{
HCUndo vUndo = vUndoList.Last;
if (vUndo != null)
{
HCItemUndoAction vItemAction = vUndo.ActionAppend(UndoActionTag.uatInsertItem, aItemNo, aOffset,
Items[aItemNo].ParaFirst) as HCItemUndoAction;
SaveItemToStreamAlone(Items[aItemNo], vItemAction.ItemStream);
}
}
}
protected void UndoAction_ItemMirror(int aItemNo, int aOffset)
{
HCUndoList vUndoList = GetUndoList();
if ((vUndoList != null) && vUndoList.Enable)
{
HCUndo vUndo = vUndoList.Last;
if (vUndo != null)
{
HCItemUndoAction vItemAction = vUndo.ActionAppend(HCAction.actItemMirror, aItemNo, aOffset,
Items[aItemNo].ParaFirst) as HCItemUndoAction;
SaveItemToStreamAlone(vItemAction.ItemStream, Items[aItemNo]);
}
}
}
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 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);
}
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);
}
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;
}
}
