private static void CheckCommandBinding(
TextBox textBox, TextCommandFlags textCommandFlags,
IEnumerable<CommandBinding> commandBindings, CommandBindingCollection commandBindingCollection,
RoutedUICommand command, TextCommandFlags commandFlag, TextCommandType commandType)
{
var commandBinding = commandBindings.FirstOrDefault(cb => cb.Command == command);
if (textCommandFlags.HasFlag(commandFlag) && commandBinding == null)
{
commandBindingCollection.Add(TextCommandBindings.CreateCommandBinding(textBox, commandType));
}
else if (!textCommandFlags.HasFlag(commandFlag) && commandBinding != null)
{
commandBindingCollection.Remove(commandBinding);
}
}
public static void SetTextCommands(DependencyObject obj, TextCommandFlags value)
{
obj.SetValue(TextCommandsProperty, value);
}
private static void AddOrRemoveCommandBindings(TextBox textBox, TextCommandFlags textCommandFlags)
{
var commandBindingCollection = textBox.CommandBindings;
var commandBindings = commandBindingCollection.Cast<CommandBinding>().ToArray();
CheckCommandBinding(
textBox, textCommandFlags, commandBindings, commandBindingCollection, TextCommands.Trim,
TextCommandFlags.TrimAll, TextCommandType.TrimAll);
CheckCommandBinding(
textBox, textCommandFlags, commandBindings, commandBindingCollection,
TextCommands.TrimEnd, TextCommandFlags.TrimEnd, TextCommandType.TrimEnd);
CheckCommandBinding(
textBox, textCommandFlags, commandBindings, commandBindingCollection,
TextCommands.TrimStart, TextCommandFlags.TrimStart, TextCommandType.TrimStart);
}
