1/*
  2 *
  3 * Licensed to the Apache Software Foundation (ASF) under one
  4 * or more contributor license agreements.  See the NOTICE file
  5 * distributed with this work for additional information
  6 * regarding copyright ownership.  The ASF licenses this file
  7 * to you under the Apache License, Version 2.0 (the
  8 * "License"); you may not use this file except in compliance
  9 * with the License.  You may obtain a copy of the License at
 10 *
 11 *   http://www.apache.org/licenses/LICENSE-2.0
 12 *
 13 * Unless required by applicable law or agreed to in writing,
 14 * software distributed under the License is distributed on an
 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 16 * KIND, either express or implied.  See the License for the
 17 * specific language governing permissions and limitations
 18 * under the License.
 19 *
 20*/
 21
 22// Default parameter values including image size can be changed in `config.xml`
 23var splashImageWidth = 170;
 24var splashImageHeight = 200;
 25var position = { x: 0, y: 0, width: splashImageWidth, height: splashImageHeight }; 
 26var localSplash; // the image to display
 27var localSplashImage;
 28var bgColor = "#464646";
 29var imageSrc = '/img/logo.png';
 30var splashScreenDelay = 3000; // in milliseconds
 31var showSplashScreen = true; // show splashcreen by default
 32var cordova = require('cordova');
 33var configHelper = cordova.require('cordova/confighelper');
 34
 35function updateImageLocation() {
 36    position.width = Math.min(splashImageWidth, window.innerWidth);
 37    position.height = position.width * (splashImageHeight / splashImageWidth);
 38
 39    localSplash.style.width = window.innerWidth + "px";
 40    localSplash.style.height = window.innerHeight + "px";
 41    localSplash.style.top = "0px";
 42    localSplash.style.left = "0px";
 43
 44    localSplashImage.style.top = "50%";
 45    localSplashImage.style.left = "50%";
 46    localSplashImage.style.height = position.height + "px";
 47    localSplashImage.style.width = position.width + "px";
 48    localSplashImage.style.marginTop = (-position.height / 2) + "px";
 49    localSplashImage.style.marginLeft = (-position.width / 2) + "px";
 50}
 51
 52function onResize() {
 53    updateImageLocation();
 54}
 55
 56var SplashScreen = {
 57    setBGColor: function (cssBGColor) {
 58        bgColor = cssBGColor;
 59        if (localSplash) {
 60            localSplash.style.backgroundColor = bgColor;
 61        }
 62    },
 63    show: function () {
 64        if(!localSplash) {
 65            window.addEventListener("resize", onResize, false);
 66            localSplash = document.createElement("div");
 67            localSplash.style.backgroundColor = bgColor;
 68            localSplash.style.position = "absolute";
 69
 70            localSplashImage = document.createElement("img");
 71            localSplashImage.src = imageSrc;
 72            localSplashImage.style.position = "absolute";
 73
 74            updateImageLocation();
 75
 76            localSplash.appendChild(localSplashImage);
 77            document.body.appendChild(localSplash);
 78        }
 79    },
 80    hide: function () {
 81        if(localSplash) {
 82            window.removeEventListener("resize", onResize, false);
 83            document.body.removeChild(localSplash);
 84            localSplash = null;
 85        }
 86    }
 87};
 88
 89/**
 90 * Reads preferences via ConfigHelper and substitutes default parameters.
 91 */
 92function readPreferencesFromCfg(cfg) {
 93    try {
 94        var value = cfg.getPreferenceValue('ShowSplashScreen');
 95        if(typeof value != 'undefined') {
 96            showSplashScreen = value === 'true';
 97        }
 98
 99        splashScreenDelay = cfg.getPreferenceValue('SplashScreenDelay') || splashScreenDelay;
100        imageSrc = cfg.getPreferenceValue('SplashScreen') || imageSrc;
101        bgColor = cfg.getPreferenceValue('SplashScreenBackgroundColor') || bgColor;
102        splashImageWidth = cfg.getPreferenceValue('SplashScreenWidth') || splashImageWidth;
103        splashImageHeight = cfg.getPreferenceValue('SplashScreenHeight') || splashImageHeight;
104    } catch(e) {
105        var msg = '[Browser][SplashScreen] Error occured on loading preferences from config.xml: ' + JSON.stringify(e);
106        console.error(msg);
107    }
108}
109
110/**
111 * Shows and hides splashscreen if it is enabled, with a delay according the current preferences.
112 */
113function showAndHide() {
114    if(showSplashScreen) {
115        SplashScreen.show();
116
117        window.setTimeout(function() {
118            SplashScreen.hide();
119        }, splashScreenDelay);
120    }
121}
122
123/**
124 * Tries to read config.xml and override default properties and then shows and hides splashcreen if it is enabled.
125 */
126(function initAndShow() {
127    configHelper.readConfig(function(config) {
128        readPreferencesFromCfg(config);
129        showAndHide();
130    }, function(err) {
131        console.error(err);
132    });
133})();
134
135module.exports = SplashScreen;
136
137require("cordova/exec/proxy").add("SplashScreen", SplashScreen);
138