New extension to delay page loading until page displays

Fixes: https://bugs.launchpad.net/midori/+bug/1010219

extensions/delayed-load.vala

@@ -0,0 +1,97 @@
+/*
+   Copyright (C) 2012 André Stösel <andre@stoesel.de>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   See the file COPYING for the full license text.
+*/
+
+using Katze;
+using Midori;
+
+namespace DelayedLoad {
+    private class Manager : Midori.Extension {
+        private void tab_changed (GLib.Object window, GLib.ParamSpec pspec) {
+            Midori.Browser browser = window as Midori.Browser;
+            Midori.View? view = browser.tab as Midori.View;
+
+            Katze.Item item = view.get_proxy_item ();
+            item.ref();
+
+            int64 delay = item.get_meta_integer ("delay");
+            if (delay == -2 && view.can_reload ()) {
+                view.reload (true);
+            }
+        }
+
+        private bool reload_first_tab () {
+            Midori.App app = get_app ();
+            Midori.Browser? browser = app.browser;
+            Midori.View? view = browser.tab as Midori.View;
+
+            Katze.Item item = view.get_proxy_item ();
+            item.ref();
+
+            int64 delay = item.get_meta_integer ("delay");
+            if (delay != 1) {
+                unowned WebKit.WebView web_view = view.get_web_view ();
+                WebKit.LoadStatus load_status = web_view.load_status;
+                if (load_status == WebKit.LoadStatus.FINISHED) {
+                    if (view.can_reload ())
+                        view.reload (false);
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        private void browser_added (Midori.Browser browser) {
+            browser.notify["tab"].connect (this.tab_changed);
+        }
+
+        private void browser_removed (Midori.Browser browser) {
+            browser.notify["tab"].disconnect (this.tab_changed);
+        }
+
+        public void activated (Midori.App app) {
+            /* FIXME: override behavior without changing the preference */
+            app.settings.load_on_startup = MidoriStartup.DELAYED_PAGES;
+
+            Midori.Browser? focused_browser = app.browser;
+            if (focused_browser == null)
+                Timeout.add (50, this.reload_first_tab);
+
+            foreach (Midori.Browser browser in app.get_browsers ()) {
+                browser_added (browser);
+            }
+            app.add_browser.connect (browser_added);
+        }
+
+        public void deactivated () {
+            Midori.App app = get_app ();
+            foreach (Midori.Browser browser in app.get_browsers ()) {
+                browser_removed (browser);
+            }
+            app.add_browser.disconnect (browser_added);
+        }
+
+        internal Manager () {
+            GLib.Object (name: _("Delayed load"),
+                         description: _("Delay page load until you actually use the tab."),
+                         version: "0.1",
+                         authors: "André Stösel <andre@stoesel.de>");
+
+            activate.connect (this.activated);
+            deactivate.connect (this.deactivated);
+        }
+    }
+}
+
+public Midori.Extension extension_init () {
+    return new DelayedLoad.Manager ();
+}
+

midori/midori.vapi

@@ -14,7 +14,7 @@ namespace Midori {
         [NoAccessorMethod]
         public string name { get; set; }
         [NoAccessorMethod]
-        public Midori.WebSettings settings { get; set; }
+        public Midori.WebSettings settings { owned get; set; }
         [NoAccessorMethod]
         public GLib.Object bookmarks { get; set; }
         [NoAccessorMethod]
@@ -176,6 +176,8 @@ namespace Midori {
 
     public class WebSettings : WebKit.WebSettings {
         public WebSettings ();
+        [NoAccessorMethod]
+        public MidoriStartup load_on_startup { get; set; }
     }
 
     [CCode (cheader_filename = "midori/midori-websettings.h", cprefix = "MIDORI_STARTUP_")]