WebKit2EDITING_COMMAND_PASTE_AS_PLAIN_TEXT

The paste as plaintext clipboard command. Pastes the contents of the clipboard to a WebKitWebView, with formatting removed. You can check whether it’s possible to execute the command with webkit_web_view_can_execute_editing_command(). In general it’s possible to paste from the clipboard when the WebKitWebView content is editable and clipboard is not empty.