/// <summary>
/// Changes the value of a text.
/// </summary>
/// <param name="nodeIndex">Index of the state with the string to change.</param>
/// <param name="propertyName">Name of the property to change.</param>
/// <param name="text">The new text.</param>
/// <param name="oldCaretPosition">The old caret position.</param>
/// <param name="newCaretPosition">The new caret position.</param>
/// <param name="changeCaretBeforeText">True if the caret should be changed before the text, to preserve the caret invariant.</param>
public virtual void ChangeTextAndCaretPosition(IFocusIndex nodeIndex, string propertyName, string text, int oldCaretPosition, int newCaretPosition, bool changeCaretBeforeText)
{
Contract.RequireNotNull(nodeIndex, out IFocusIndex NodeIndex);
Contract.RequireNotNull(text, out string Text);
Debug.Assert(StateTable.ContainsKey(NodeIndex));
System.Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => RedoChangeText(operation);
System.Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => UndoChangeText(operation);
IFocusNodeState State = (IFocusNodeState)StateTable[NodeIndex];
FocusChangeTextOperation Operation = CreateChangeTextOperation(State.Node, propertyName, Text, oldCaretPosition, newCaretPosition, changeCaretBeforeText, HandlerRedo, HandlerUndo, isNested: false);
Operation.Redo();
SetLastOperation(Operation);
CheckInvariant();
}
private protected virtual bool IsSameChangeTextOperationFocus(FocusChangeTextOperation operation)
{
Node Node = null;
if (operation.State.ParentIndex is IFocusNodeIndex AsNodeIndex)
{
Node = AsNodeIndex.Node;
}
else if (operation.State is IFocusOptionalNodeState AsOptionalNodeState && AsOptionalNodeState.ParentInner.IsAssigned)
{
Node = AsOptionalNodeState.Node;
}
Debug.Assert(Node != null);
string PropertyName = operation.PropertyName;
Node FocusedNode = null;
IFocusFrame FocusedFrame = null;
Focus.GetLocationInSourceCode(out FocusedNode, out FocusedFrame);
return(FocusedNode == Node && FocusedFrame is IFocusTextValueFrame AsTextValueFrame && AsTextValueFrame.PropertyName == PropertyName);
}