Support for Google Gears managed offline storage. Props azaozz. see #6965

git-svn-id: http://svn.automattic.com/wordpress/trunk@7938 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/wp-gears.js

@@ -0,0 +1,82 @@
+
+wpGears = {
+
+	init : function() {
+		if ( 'undefined' != typeof google && google.gears ) {
+			try { 
+				localServer = google.gears.factory.create("beta.localserver");
+				this.createStore();
+			} catch(e) { // silence if canceled
+				this.message();
+			}
+	  	}
+	},
+
+	createStore : function() {
+		if ( 'undefined' == typeof google || ! google.gears ) return;
+
+		store = localServer.createManagedStore(this.storeName());
+		store.manifestUrl = "gears-manifest.php";
+		store.checkForUpdate();
+		this.message();
+	},
+
+	removeStore : function() {
+		if ( 'undefined' == typeof google || ! google.gears ) return;
+
+		localServer.removeManagedStore(this.storeName());
+		this.message();
+	},
+
+	storeName : function() {
+      var name = window.location.protocol + window.location.host;
+
+      name = name.replace(/[\/\\:*"?<>|;,]+/g, '_'); // gears beta doesn't allow certain chars in the store name
+	  name = 'wp_' + name.substring(0, 60); // max length of name is 64 chars
+
+      return name;
+    },
+
+    message : function() {
+		var t = this, msg1 = t.I('gears-msg1'), msg2 = t.I('gears-msg2'), msg3 = t.I('gears-msg3'), num = t.I('gears-upd-number'), wait = t.I('gears-wait');
+
+		if ( ! msg1 ) return;
+
+        if ( 'undefined' != typeof store ) {
+			msg1.style.display = msg2.style.display = 'none';
+			msg3.style.display = 'block';
+
+			store.oncomplete = function(){wait.innerHTML = (' ' + wpGearsL10n.updateCompleted);};
+			store.onerror = function(){wait.innerHTML = (' ' + wpGearsL10n.error + ' ' + store.lastErrorMessage);};
+			store.onprogress = function(e){if(num) num.innerHTML = (' ' + e.filesComplete + ' / ' + e.filesTotal);};
+        } else if ( 'undefined' != typeof google && google.gears ) {
+			msg1.style.display = 'none';
+			msg2.style.display = 'block';
+		}
+	},
+	
+	I : function(id) {
+		return document.getElementById(id);
+	}
+}
+
+addLoadEvent( function(){wpGears.init()} );
+
+function gearsInit() {
+	if ( 'undefined' != typeof google && google.gears ) return;
+
+	var gf = false;
+	if ( 'undefined' != typeof GearsFactory ) { // Firefox
+		gf = new GearsFactory();
+	} else { // IE
+		try {
+			gf = new ActiveXObject('Gears.Factory');
+		} catch (e) {}
+	}
+
+	if ( ! gf ) return;
+	if ( 'undefined' == typeof google ) google = {};
+	if ( ! google.gears ) google.gears = { factory : gf };
+}
+
+gearsInit();