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 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 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;
}
}