Registers a new user script message handler. After it is registered,
scripts can use window.webkit.messageHandlers.<name>.postMessage(value)
to send messages. Those messages are received by connecting handlers
to the #WebKitUserContentManager::script-message-received signal. The
handler name is used as the detail of the signal. To avoid race
conditions between registering the handler name, and starting to
receive the signals, it is recommended to connect to the signal
*before* registering the handler name:
Registers a new user script message handler. After it is registered, scripts can use window.webkit.messageHandlers.<name>.postMessage(value) to send messages. Those messages are received by connecting handlers to the #WebKitUserContentManager::script-message-received signal. The handler name is used as the detail of the signal. To avoid race conditions between registering the handler name, and starting to receive the signals, it is recommended to connect to the signal *before* registering the handler name:
<informalexample><programlisting> WebKitWebView *view = webkit_web_view_new (); WebKitUserContentManager *manager = webkit_web_view_get_user_content_manager (); g_signal_connect (manager, "script-message-received::foobar", G_CALLBACK (handle_script_message), NULL); webkit_user_content_manager_register_script_message_handler (manager, "foobar"); </programlisting></informalexample>
Registering a script message handler will fail if the requested name has been already registered before.