61 lines
2.2 KiB
C#
61 lines
2.2 KiB
C#
// Copyright © 2019 The CefSharp Authors. All rights reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
|
|
|
|
using System;
|
|
|
|
namespace CefSharp.WinForms
|
|
{
|
|
/// <summary>
|
|
/// Helper extensions for performing common CefSharp related WinForms tasks
|
|
/// </summary>
|
|
public static class WebBrowserExtensions
|
|
{
|
|
[System.Runtime.InteropServices.DllImport("user32.dll")]
|
|
private static extern bool DestroyWindow(IntPtr hWnd);
|
|
|
|
/// <summary>
|
|
/// Manually call https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-destroywindow
|
|
/// passing in the handle returned from <see cref="IBrowserHost.GetWindowHandle"/>.
|
|
/// This method can be used to manually close the underlying CefBrowser instance.
|
|
/// This will avoid the WM_Close message that CEF sends by default to the top level window.
|
|
/// (Which closes your application). This method should generally only be used in the WinForms version.
|
|
/// </summary>
|
|
/// <param name="chromiumWebBrowser">the ChromiumWebBrowser instance</param>
|
|
/// <returns>If the function succeeds, the return value is true.</returns>
|
|
/// <example>
|
|
/// <code>
|
|
/// //Invoke on the CEF UI Thread
|
|
/// Cef.UIThreadTaskFactory.StartNew(() =>
|
|
/// {
|
|
/// var closed = chromiumWebBrowser.DestroyWindow();
|
|
/// });
|
|
/// </code>
|
|
/// </example>
|
|
public static bool DestroyWindow(this IWebBrowser chromiumWebBrowser)
|
|
{
|
|
if (!Cef.CurrentlyOnThread(CefThreadIds.TID_UI))
|
|
{
|
|
throw new InvalidOperationException("This method can only be called on the CEF UI thread." +
|
|
"Use Cef.UIThreadTaskFactory to marshal your call onto the CEF UI Thread.");
|
|
}
|
|
|
|
if (chromiumWebBrowser.IsDisposed)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var browser = chromiumWebBrowser.GetBrowser();
|
|
|
|
if (browser == null)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var handle = browser.GetHost().GetWindowHandle();
|
|
|
|
|
|
return DestroyWindow(handle);
|
|
}
|
|
}
|
|
}
|