/// <summary>
/// Initializes <see cref="ClipboardManager"/> and places the <see cref="MainForm"/> window in the system-maintained clipboard format listener list.
/// </summary>
/// <param name="window">A <see cref="MainForm"/> object.</param>
/// <exception cref="ArgumentNullException"/>
/// <exception cref="InvalidOperationException"/>
/// <exception cref="NotSupportedException"/>
internal static void Initialize(MainForm window)
{
if (window == null)
{
throw new ArgumentNullException(nameof(window));
}
else if (history != null)
{
throw new InvalidOperationException(nameof(ClipboardManager) + " is already initialized.");
}
if (Win32.ShouldUseWin32())
{
try
{
hwnd = window.Handle;
if (!UnsafeNativeMethods.AddClipboardFormatListener(hwnd))
{
hwnd = IntPtr.Zero;
var ex = new Win32Exception(Marshal.GetLastWin32Error());
throw new NotSupportedException(ex.Message, ex);
}
}
catch (EntryPointNotFoundException)
{
hwnd = IntPtr.Zero;
}
}
history = new FixedSizeQueue <ClipboardTextData>(Globals.Settings.ClipboardHistorySize);
try
{
var dataObject = Clipboard.GetDataObject();
if (ClipboardTextData.IsTextFormat(dataObject))
{
history.Enqueue(new ClipboardTextData(dataObject));
}
}
catch (ExternalException) { }
catch (ThreadStateException) { }
}
/// <summary>
/// Handles <see cref="Form.WndProc"/> for a clipboard update message.
/// Returns <see langword="true"/> if new clipboard data is added; <see langword="false"/> otherwise.
/// </summary>
/// <param name="m">A <see cref="Message"/> object.</param>
/// <exception cref="InvalidOperationException"/>
/// <exception cref="ThreadStateException"/>
internal static bool HandleWndProc(ref Message m)
{
if (m.Msg == UnsafeNativeMethods.WM_CLIPBOARDUPDATE)
{
try
{
var dataObject = Clipboard.GetDataObject();
if (ClipboardTextData.IsTextFormat(dataObject))
{
history.Enqueue(new ClipboardTextData(dataObject));
return(true);
}
}
catch (NullReferenceException ex)
{
throw new InvalidOperationException(nameof(ClipboardManager) + " is either not initialized or disposed.", ex);
}
catch (ExternalException) { }
//catch (ThreadStateException) { }
}
return(false);
}
