Edge WebView2 support

[r0x0r]

Windows Forms support for Chromium based WebView2 has finally arrived. Implementing this for pywebview should be doable at this point.

https://docs.microsoft.com/en-us/microsoft-edge/webview2/gettingstarted/winforms

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[kvnxiao]

Any chance of this being done any time soon?

[r0x0r]

@kvnxiao I am not working on this actively at the moment, not sure when I have time and energy to devote to this issue.

However, if you want to see this implemented fast, consider sponsoring this issue.

[kvnxiao]

Suppose if I have time to contribute to this, what exactly is required to get WebView2 up and running together?

[r0x0r]

1. WebView2 implementation is to be done in the same manner as EdgeHTML, ie no changes would be needed to made to window logic. WebView2 component would be attached as a child to the form.

2. WebView2 detection logic is needed (checking for .NET and Window 10 versions ), as it is done with Edge

   pywebview/webview/platforms/winforms.py

   Line 68 in 746fd6a

   is_edge = _is_edge() and forced_gui_ != 'mshtml'

3. winforms.py will require a refactor at some point, as it is already too large for a single file. In practice that would be mean splitting renderer code to separate files.

4. renderer value for WebView2 can be chromium

5. EdgeHTML is buggy af, not sure if WebView2 is any better. In any case, one should prepare for all kinds of quirks and funky solutions.

[kvnxiao]

WebView2 uses Chromium so it should not be buggy in any way; it would be as buggy as using chromium on other platforms.

[dmwyatt]

@kvnxiao Are you going to work on this?

[kvnxiao]

@dmwyatt I don't think I have the time to contribute on this one, but just simply wanted to ask for a clear roadmap in case someone else would like to work on it.

[tshemeng]

Announcing Microsoft Edge WebView2 General Availability

[Ksengine]

https://github.com/MicrosoftEdge/WebView2Samples/blob/master/SampleApps/WebView2WindowsFormsBrowser

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