1 // Copyright (c) 2012 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 // Called by the common.js module. 6 function domContentLoaded(name, tc, config, width, height) { 7 var listener = document.getElementById('listener'); 8 listener.addEventListener('loadstart', moduleDidStartLoad, true); 9 listener.addEventListener('progress', moduleLoadProgress, true); 10 listener.addEventListener('error', moduleLoadError, true); 11 listener.addEventListener('abort', moduleLoadAbort, true); 12 listener.addEventListener('load', moduleDidLoad, true); 13 listener.addEventListener('loadend', moduleDidEndLoad, true); 14 listener.addEventListener('message', handleMessage, true); 15 16 common.createNaClModule(name, tc, config, width, height); 17 } 18 19 // Handler that gets called when the NaCl module starts loading. This 20 // event is always triggered when an <EMBED> tag has a MIME type of 21 // application/x-nacl. 22 function moduleDidStartLoad() { 23 common.logMessage('loadstart'); 24 } 25 26 // Progress event handler. |event| contains a couple of interesting 27 // properties that are used in this example: 28 // total The size of the NaCl module in bytes. Note that this value 29 // is 0 until |lengthComputable| is true. In particular, this 30 // value is 0 for the first 'progress' event. 31 // loaded The number of bytes loaded so far. 32 // lengthComputable A boolean indicating that the |total| field 33 // represents a valid length. 34 // 35 // event The ProgressEvent that triggered this handler. 36 function moduleLoadProgress(event) { 37 var loadPercent = 0.0; 38 var loadPercentString; 39 if (event.lengthComputable && event.total > 0) { 40 loadPercent = event.loaded / event.total * 100.0; 41 loadPercentString = loadPercent + '%'; 42 common.logMessage('progress: ' + event.url + ' ' + loadPercentString + 43 ' (' + event.loaded + ' of ' + event.total + ' bytes)'); 44 } else { 45 // The total length is not yet known. 46 common.logMessage('progress: Computing...'); 47 } 48 } 49 50 // Handler that gets called if an error occurred while loading the NaCl 51 // module. Note that the event does not carry any meaningful data about 52 // the error, you have to check lastError on the <EMBED> element to find 53 // out what happened. 54 function moduleLoadError() { 55 common.logMessage('error: ' + common.naclModule.lastError); 56 } 57 58 // Handler that gets called if the NaCl module load is aborted. 59 function moduleLoadAbort() { 60 common.logMessage('abort'); 61 } 62 63 // When the NaCl module has loaded indicate success. 64 function moduleDidLoad() { 65 common.logMessage('load'); 66 common.updateStatus('LOADED'); 67 } 68 69 // Handler that gets called when the NaCl module loading has completed. 70 // You will always get one of these events, regardless of whether the NaCl 71 // module loaded successfully or not. For example, if there is an error 72 // during load, you will get an 'error' event and a 'loadend' event. Note 73 // that if the NaCl module loads successfully, you will get both a 'load' 74 // event and a 'loadend' event. 75 function moduleDidEndLoad() { 76 common.logMessage('loadend'); 77 var lastError = event.target.lastError; 78 if (lastError == undefined || lastError.length == 0) { 79 lastError = '<none>'; 80 } 81 common.logMessage('lastError: ' + lastError); 82 } 83 84 // Handle a message coming from the NaCl module. 85 function handleMessage(message_event) { 86 common.logMessage('Received PostMessage: ' + message_event.data); 87 } 88
