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/* Copyright 2016 Jens Georg <mail@jensge.org>
 *
 * This software is licensed under the GNU LGPL (version 2.1 or later).
 * See the COPYING file in this distribution.
 */
using Spit.Publishing;

namespace Shotwell.Plugins.Common {
    public abstract class WebAuthenticationPane : Spit.Publishing.DialogPane, Object {
        public DialogPane.GeometryOptions preferred_geometry {
            get; construct; default = DialogPane.GeometryOptions.NONE;
        }

        public string login_uri { owned get; construct; }
        public Error load_error { get; private set; default = null; }

        private WebKit.WebView webview;

        public override void constructed () {
            base.constructed ();

            this.webview = new WebKit.WebView ();
            this.webview.get_settings ().enable_plugins = false;

            this.webview.load_changed.connect (this.on_page_load_changed);
            this.webview.load_failed.connect (this.on_page_load_failed);
            this.webview.context_menu.connect ( () => { return false; });
        }

        public abstract void on_page_load ();

        protected void set_cursor (Gdk.CursorType type) {
            var window = webview.get_window ();
            if (window == null)
                return;

            var display = window.get_display ();
            if (display == null)
                return;

            var cursor = new Gdk.Cursor.for_display (display, type);
            window.set_cursor (cursor);
        }

        private bool on_page_load_failed (WebKit.LoadEvent load_event, string uri, Error error) {
            // OAuth call-back scheme. Produces a load error because it is not HTTP(S)
            // Do not set the load_error, but continue the error handling
            if (uri.has_prefix ("shotwell-auth://"))
                return false;

            critical ("Failed to load uri %s: %s", uri, error.message);
            this.load_error = error;

            return false;
        }

        private void on_page_load_changed (WebKit.LoadEvent load_event) {
            switch (load_event) {
                case WebKit.LoadEvent.STARTED:
                case WebKit.LoadEvent.REDIRECTED:
                    this.set_cursor (Gdk.CursorType.WATCH);
                    break;
                case WebKit.LoadEvent.FINISHED:
                    this.set_cursor (Gdk.CursorType.LEFT_PTR);
                    this.on_page_load ();
                    break;
                default:
                    break;
            }
        }

        public WebKit.WebView get_view () {
            return this.webview;
        }

        public DialogPane.GeometryOptions get_preferred_geometry() {
            return this.preferred_geometry;
        }

        public Gtk.Widget get_widget() {
            return this.webview;
        }

        public void on_pane_installed () {
            this.get_view ().load_uri (this.login_uri);
        }

        public void on_pane_uninstalled() {
        }
   }
}