[Feature] Option to allow access to clipboard without user interaction

[ecxs-daedalus]

Specification

• pywebview version: 5.3.2
• operating system: MacOS & Windows
• web renderer: Edge, Cocoa

Description

I try to enable access to the clipboard for an App and always run into the browser saveguards to not give the browser unfetted access to the clipboard. For Webapplications this makes sense. In my use case I just wanto to use the renderer to have a plattform independent GUI and don't load further content.

Would it be possible to have an additional Option in the webview.settings like ALLOW_CLIPBOARD_READ ? Then the app could access the clipboard through the navigator.Clipboard API even without user interaction.

I testet some Options on the plattforms I have access to:

Windows / edgechromium.py

I added an Event callback

    def on_permission_requested(self, _, args):
        if (args.PermissionKind == args.PermissionKind.ClipboardRead):
            args.State = args.State.Allow

    def on_webview_ready(self, sender, args):
        ...

        sender.CoreWebView2.PermissionRequested += self.on_permission_requested

        ...

MacOS / cocoa.py

The trick seems to be to set javaScriptCanAccessClipboard and domPasteAllowed to True:

config.preferences().setValue_forKey_(True, 'javaScriptCanAccessClipboard')
config.preferences().setValue_forKey_(True, 'DOMPasteAllowed')

In both cases it also eliminates the strange browser dopdown on paste (especialy irritating on MacOS)

Unfortunately I don't have a Linux/GTK test environment at the moment.

Practicalities

• YES I am willing to work on this issue myself.

[ecxs-daedalus]

pywebview.zip

[ecxs-daedalus]

Preview version for Win & Mac: https://github.com/ecxs-daedalus/pywebview/tree/feature/allow_clipboard_read

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[r0x0r]

Sorry for the late response.
Yeah this sounds like a good idea and could be enabled by default, ie ALLOW_CLIPBOARD_READ would be True by default.

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