private static void DisconnectFromBuffer(ITextBuffer buffer)
{
buffer.Changed -= new EventHandler <TextContentChangedEventArgs>(BufferIdleEventUtil.BufferChanged);
BufferIdleEventUtil.ClearBufferListeners(buffer);
BufferIdleEventUtil.ClearBufferTimer(buffer);
buffer.Properties.RemoveProperty(BufferIdleEventUtil.bufferListenersKey);
}
private static void RestartTimerForBuffer(ITextBuffer buffer)
{
DispatcherTimer timer;
if (BufferIdleEventUtil.TryGetBufferTimer(buffer, out timer))
{
timer.Stop();
}
else
{
timer = new DispatcherTimer(DispatcherPriority.ApplicationIdle)
{
Interval = TimeSpan.FromMilliseconds(500.0)
};
timer.Tick += (EventHandler)((s, e) =>
{
BufferIdleEventUtil.ClearBufferTimer(buffer);
HashSet <EventHandler> listeners;
if (!BufferIdleEventUtil.TryGetBufferListeners(buffer, out listeners))
{
return;
}
foreach (EventHandler eventHandler in listeners)
{
eventHandler((object)buffer, new EventArgs());
}
});
buffer.Properties[BufferIdleEventUtil.bufferTimerKey] = (object)timer;
}
timer.Start();
}
private static HashSet <EventHandler> ConnectToBuffer(ITextBuffer buffer)
{
buffer.Changed += new EventHandler <TextContentChangedEventArgs>(BufferIdleEventUtil.BufferChanged);
BufferIdleEventUtil.RestartTimerForBuffer(buffer);
HashSet <EventHandler> eventHandlerSet = new HashSet <EventHandler>();
buffer.Properties[BufferIdleEventUtil.bufferListenersKey] = (object)eventHandlerSet;
return(eventHandlerSet);
}
private static void BufferChanged(object sender, TextContentChangedEventArgs e)
{
ITextBuffer buffer = sender as ITextBuffer;
if (buffer == null)
{
return;
}
BufferIdleEventUtil.RestartTimerForBuffer(buffer);
}
private static void ClearBufferTimer(ITextBuffer buffer)
{
DispatcherTimer timer;
if (!BufferIdleEventUtil.TryGetBufferTimer(buffer, out timer))
{
return;
}
if (timer != null)
{
timer.Stop();
}
buffer.Properties.RemoveProperty(BufferIdleEventUtil.bufferTimerKey);
}
public static bool RemoveBufferIdleEventListener(ITextBuffer buffer, EventHandler handler)
{
HashSet <EventHandler> listeners;
if (!BufferIdleEventUtil.TryGetBufferListeners(buffer, out listeners) || !listeners.Contains(handler))
{
return(false);
}
listeners.Remove(handler);
if (listeners.Count == 0)
{
BufferIdleEventUtil.DisconnectFromBuffer(buffer);
}
return(true);
}
public static bool AddBufferIdleEventListener(ITextBuffer buffer, EventHandler handler)
{
HashSet <EventHandler> listeners;
if (!BufferIdleEventUtil.TryGetBufferListeners(buffer, out listeners))
{
listeners = BufferIdleEventUtil.ConnectToBuffer(buffer);
}
if (listeners.Contains(handler))
{
return(false);
}
listeners.Add(handler);
return(true);
}
