1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 (function() { 6 7 var plugin; 8 var sizer; 9 10 function onScroll() { 11 var coordinates = [window.pageXOffset, window.pageYOffset]; 12 plugin.postMessage(coordinates); 13 } 14 15 function handleMessage(message) { 16 if (message.data['type'] == 'document_dimensions') { 17 if (sizer.style.height != message.data['document_height'] + 'px') { 18 sizer.style.height = message.data['document_height'] + 'px'; 19 sizer.style.width = message.data['document_width'] + 'px'; 20 } 21 } 22 } 23 24 function load() { 25 window.addEventListener('scroll', 26 function() { webkitRequestAnimationFrame(onScroll); }); 27 28 // The pdf location is passed in the document url in the format: 29 // http://<.../pdf.html>?<pdf location>. 30 var url = window.location.search.substring(1); 31 plugin = document.createElement('object'); 32 plugin.setAttribute('width', '100%'); 33 plugin.setAttribute('height', '100%'); 34 plugin.setAttribute('type', 'application/x-google-chrome-pdf'); 35 plugin.setAttribute('src', url); 36 plugin.style.zIndex = '1'; 37 plugin.style.position = 'fixed'; 38 plugin.addEventListener('message', handleMessage, false); 39 document.body.appendChild(plugin); 40 41 sizer = document.createElement('div'); 42 sizer.style.zIndex = '0'; 43 sizer.style.position = 'absolute'; 44 sizer.style.width = '100%'; 45 sizer.style.height = '100%'; 46 document.body.appendChild(sizer); 47 } 48 49 load(); 50 51 })(); 52
