public void Startup()
{
// Subscribe the windows events which tell us a title was changed
_winEventObservable = WinEventHook.WindowTileChangeObservable()
.Select(info => User32Api.GetText(info.Handle))
.Where(title => !string.IsNullOrEmpty(title))
.Subscribe(MonitorTitleChangeEvent);
}
/// <summary>
/// Get the Windows caption (title)
/// </summary>
/// <param name="interopWindow">InteropWindow</param>
/// <param name="forceUpdate">set to true to make sure the value is updated</param>
/// <returns>string with the caption</returns>
public static string GetCaption(this IInteropWindow interopWindow, bool forceUpdate = false)
{
if (interopWindow.Caption == null || forceUpdate)
{
var caption = User32Api.GetText(interopWindow.Handle);
interopWindow.Caption = caption;
}
return(interopWindow.Caption);
}
/// <summary>
/// Get the current "ClipboardOwner" but only if it isn't us!
/// </summary>
/// <returns>current clipboard owner</returns>
private static string GetClipboardOwner()
{
string owner = null;
try
{
var hWnd = ClipboardNative.CurrentOwner;
if (hWnd != IntPtr.Zero)
{
try
{
User32Api.GetWindowThreadProcessId(hWnd, out var pid);
using (var me = Process.GetCurrentProcess())
using (var ownerProcess = Process.GetProcessById(pid))
{
// Exclude myself
if (me.Id != ownerProcess.Id)
{
// Get Process Name
owner = ownerProcess.ProcessName;
// Try to get the starting Process Filename, this might fail.
try
{
owner = ownerProcess.Modules[0].FileName;
}
catch (Exception)
{
// Ignore
}
}
}
}
catch (Exception e)
{
Log.Warn().WriteLine(e, "Non critical error: Couldn't get clipboard process, trying to use the title.");
owner = User32Api.GetText(hWnd);
}
}
}
catch (Exception e)
{
Log.Warn().WriteLine(e, "Non critical error: Couldn't get clipboard owner.");
}
return(owner);
}
/// <summary>
/// Get the Windows caption (title)
/// </summary>
/// <param name="interopWindow">InteropWindow</param>
/// <param name="forceUpdate">set to true to make sure the value is updated</param>
/// <returns>string with the caption</returns>
public static string GetCaption(this IInteropWindow interopWindow, bool forceUpdate = false)
{
if (interopWindow.Caption != null && !forceUpdate)
{
return(interopWindow.Caption);
}
// Calling User32Api.GetText (GetWindowText) for the current Process will hang, deadlock, this should be ignored
if (interopWindow.IsOwnedByCurrentThread())
{
// TODO: it might have a value, but can't get it. Returning null would be bad... so return empty
interopWindow.Caption = string.Empty;
Log.Warn().WriteLine("Do not call GetWindowText for a Window ({0}) which belongs the current thread! An empty string is returned.", interopWindow.Handle);
}
else
{
var caption = User32Api.GetText(interopWindow.Handle);
interopWindow.Caption = caption;
}
return(interopWindow.Caption);
}
