External Download manager extension for Steadyflow

As it is activated, the Save button uses Steadyflow.

extensions/external-download-manager.vala

@@ -0,0 +1,91 @@
+/*
+   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 Gtk;
+using WebKit;
+using Midori;
+
+namespace EDM {
+    [DBus (name = "net.launchpad.steadyflow.App")]
+    interface SteadyflowInterface : GLib.Object {
+        public abstract void AddFile (string url) throws IOError;
+    }
+
+    private class Manager : Midori.Extension {
+        public bool download_requested (Midori.View view,
+            WebKit.Download download, Midori.Browser browser) {
+            if (download.get_data<void*> ("save-as-download") == null
+             && download.get_data<void*> ("open-download") == null) {
+                try {
+                    SteadyflowInterface db = Bus.get_proxy_sync (
+                        BusType.SESSION,
+                        "net.launchpad.steadyflow.App",
+                        "/net/launchpad/steadyflow/app");
+                    db.AddFile (download.get_uri ());
+                    return true;
+                } catch (Error e) {
+                    stderr.printf("Error: %s\n", e.message);
+                }
+            }
+            return false;
+        }
+
+        public void tab_added (Midori.Browser browser, Midori.View view) {
+            view.download_requested.connect (download_requested);
+        }
+
+        public void tab_removed (Midori.Browser browser, Midori.View view) {
+            view.download_requested.disconnect(download_requested);
+        }
+
+        public void browser_added (Midori.Browser browser) {
+            foreach (var tab in browser.get_tabs ())
+                tab_added (browser, tab);
+            browser.add_tab.connect (tab_added);
+            browser.remove_tab.connect (tab_removed);
+        }
+
+        public void browser_removed (Midori.Browser browser) {
+            foreach (var tab in browser.get_tabs ())
+                tab_removed (browser, tab);
+            browser.add_tab.disconnect (tab_added);
+            browser.remove_tab.disconnect (tab_removed);
+        }
+
+        public void activated (Midori.App app) {
+            foreach (var browser in app.get_browsers ())
+                browser_added (browser);
+            app.add_browser.connect (browser_added);
+        }
+
+        public void deactivated () {
+            var app = get_app ();
+            foreach (var browser in app.get_browsers ())
+                browser_removed (browser);
+            app.add_browser.disconnect (browser_added);
+        }
+
+        internal Manager () {
+            GLib.Object (name: _("External Download Manager"),
+                         description: _("Download files with SteadyFlow"),
+                         version: "0.1" + Midori.VERSION_SUFFIX,
+                         authors: "André Stösel <andre@stoesel.de>");
+
+            this.activate.connect (activated);
+            this.deactivate.connect (deactivated);
+        }
+    }
+}
+
+public Midori.Extension extension_init () {
+    return new EDM.Manager ();
+}
+