[Windows8][CB-4450] Implemented splash-screen for Windows8

plugin.xml

@@ -70,4 +70,11 @@
 
     </platform>
 
+    <!-- windows8 -->
+    <platform name="windows8">
+        <js-module src="www/windows8/SplashScreenProxy.js" name="SplashScreenProxy">
+            <merges target="" />
+        </js-module>
+    </platform>
+
 </plugin>

www/windows8/SplashScreenProxy.js

@@ -0,0 +1,104 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+*/
+
+/*global Windows:true */
+
+    var cordova = require('cordova'),
+        channel = require('cordova/channel');
+
+/* This is the actual implementation part that returns the result on Windows 8
+*/
+
+    var position = { x: 0, y: 0, width: 0, height: 0 };  // defined by evt.detail.splashScreen.imageLocation
+    var splash = null; // 
+    var localSplash; // the image to display
+    var localSplashImage;
+    var bgColor = "#464646";
+
+    function onResize(evt) {
+        if (splash) {
+            position = splash.imageLocation;
+            updateImageLocation();
+        }
+    }
+
+    function updateImageLocation() {
+        localSplash.style.width = window.innerWidth + "px";
+        localSplash.style.height = window.innerHeight + "px";
+        localSplash.style.top = "0px";
+        localSplash.style.left = "0px";
+
+        localSplashImage.style.top = position.y + "px";
+        localSplashImage.style.left = position.x + "px";
+        localSplashImage.style.height = position.height + "px";
+        localSplashImage.style.width = position.width + "px";
+    }
+
+    var SplashScreen = {
+        setBGColor:function(cssBGColor) {
+            bgColor = cssBGColor;
+            if (localSplash) {
+                localSplash.style.backgroundColor = bgColor;
+            }
+        },
+        show:function(){
+            window.addEventListener("resize", onResize, false);
+            localSplash = document.createElement("div");
+            localSplash.style.backgroundColor = bgColor;;
+            localSplash.style.position = "absolute";
+
+            var img = localSplashImage = document.createElement("img");
+            img.src = "img/splashscreen.png";
+            img.style.position = "absolute";
+
+            updateImageLocation();
+
+            localSplash.appendChild(localSplashImage);
+            document.body.appendChild(localSplash);
+        },
+        hide:function(){
+            window.removeEventListener("resize", onResize, false);
+            document.body.removeChild(localSplash);
+            localSplash = null;
+        }
+    }
+
+    module.exports = SplashScreen;
+
+function activated(evt) {
+    if (evt.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) {
+        splash = evt.detail.splashScreen;
+        position = evt.detail.splashScreen.imageLocation;
+        SplashScreen.show();
+    }
+}
+
+
+
+
+channel.onCordovaReady.subscribe(function (evt) {
+    document.addEventListener("DOMContentLoaded", function (evt) {
+        WinJS.Application.addEventListener("activated", activated, false);
+    }, false);
+});
+
+require("cordova/commandProxy").add("SplashScreen",SplashScreen);
+