protected void UndoAction_DeleteBackText(int aItemNo, int aOffset, string aText)
{
HCUndoList vUndoList = GetUndoList();
if ((vUndoList != null) && vUndoList.Enable)
{
HCUndo vUndo = vUndoList.Last;
if (vUndo != null)
{
HCTextUndoAction vTextAction = vUndo.ActionAppend(UndoActionTag.uatDeleteBackText, aItemNo, aOffset,
Items[aItemNo].ParaFirst) as HCTextUndoAction;
vTextAction.Text = aText;
}
}
}
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);
}
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;
}
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);
}