1 <!-- 2 A background page that manages notifications. 3 4 Copyright 2010 the Chromium Authors 5 6 Use of this source code is governed by a BSD-style license that can be found 7 in the "LICENSE" file. 8 9 Brian Kennish <bkennish (a] chromium.org> 10 --> 11 <script> 12 /* 13 Displays a notification with the current time. Requires "notifications" 14 permission in the manifest file (or calling 15 "webkitNotifications.requestPermission" beforehand). 16 */ 17 function show() { 18 var time = /(..)(:..)/(Date()); // The prettyprinted time. 19 var hour = time[1] % 12 || 12; // The prettyprinted hour. 20 var period = time[1] < 12 ? 'a.m.' : 'p.m.'; // The period of the day. 21 var notification = webkitNotifications.createNotification( 22 '48.png', // The image. 23 hour + time[2] + ' ' + period, // The title. 24 'Time to make the toast.' // The body. 25 ); 26 notification.show(); 27 } 28 29 // Conditionally initialize the options. 30 if (!localStorage.isInitialized) { 31 localStorage.isActivated = true; // The display activation. 32 localStorage.frequency = 1; // The display frequency, in minutes. 33 localStorage.isInitialized = true; // The option initialization. 34 } 35 36 // Test for notification support. 37 if (webkitNotifications) { 38 // While activated, show notifications at the display frequency. 39 if (JSON.parse(localStorage.isActivated)) { show(); } 40 41 var interval = 0; // The display interval, in minutes. 42 43 setInterval(function() { 44 interval++; 45 46 if ( 47 JSON.parse(localStorage.isActivated) && 48 localStorage.frequency <= interval 49 ) { 50 show(); 51 interval = 0; 52 } 53 }, 60000); 54 } else { 55 // Show a new tab with an error message. 56 chrome.tabs.create({url: 'error.html'}); 57 } 58 </script> 59
