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| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <!-- |
| 4 Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 5 Use of this source code is governed by a BSD-style license that can be |
| 6 found in the LICENSE file. |
| 7 --> |
| 8 <head> |
| 9 <meta http-equiv="Pragma" content="no-cache" /> |
| 10 <meta http-equiv="Expires" content="-1" /> |
| 11 <title>Hello, World!</title> |
| 12 <script type="text/javascript"> |
| 13 naclModule = null; // Global application object. |
| 14 statusText = 'NO-STATUSES'; |
| 15 |
| 16 function ExtractSearchParameter(name, def_value) { |
| 17 var nameIndex = window.location.search.indexOf(name + "="); |
| 18 if (nameIndex != -1) { |
| 19 var value = location.search.substring(nameIndex + name.length + 1); |
| 20 var endIndex = value.indexOf("&"); |
| 21 if (endIndex != -1) |
| 22 value = value.substring(0, endIndex); |
| 23 return value; |
| 24 } |
| 25 return def_value; |
| 26 } |
| 27 |
| 28 function createNaClModule(name, tool, width, height) { |
| 29 var listenerDiv = document.getElementById('listener'); |
| 30 var naclModule = document.createElement('embed'); |
| 31 naclModule.setAttribute('name', 'nacl_module'); |
| 32 naclModule.setAttribute('id', 'file_io'); |
| 33 naclModule.setAttribute('width', width); |
| 34 naclModule.setAttribute('height',height); |
| 35 naclModule.setAttribute('src', tool + '/' + name + '.nmf'); |
| 36 naclModule.setAttribute('type', 'application/x-nacl'); |
| 37 listenerDiv.appendChild(naclModule); |
| 38 } |
| 39 // Indicate success when the NaCl module has loaded. |
| 40 function moduleDidLoad() { |
| 41 naclModule = document.getElementById('nacl_module'); |
| 42 updateStatus('SUCCESS'); |
| 43 } |
| 44 |
| 45 // Handle a message coming from the NaCl module. |
| 46 function handleMessage(message_event) { |
| 47 alert(message_event.data); |
| 48 } |
| 49 |
| 50 // If the page loads before the Native Client module loads, then set the |
| 51 // status message indicating that the module is still loading. Otherwise, |
| 52 // do not change the status message. |
| 53 function pageDidLoad() { |
| 54 updateStatus('Page loaded.'); |
| 55 if (naclModule == null) { |
| 56 tool = ExtractSearchParameter('tool', 'newlib'); |
| 57 updateStatus('Creating embed: ' + tool) |
| 58 createNaClModule('hello_world', tool, 200, 200) |
| 59 } else { |
| 60 // It's possible that the Native Client module onload event fired |
| 61 // before the page's onload event. In this case, the status message |
| 62 // will reflect 'SUCCESS', but won't be displayed. This call will |
| 63 // display the current message. |
| 64 updateStatus('Waiting.'); |
| 65 } |
| 66 } |
| 67 |
| 68 // Set the global status message. If the element with id 'statusField' |
| 69 // exists, then set its HTML to the status message as well. |
| 70 // opt_message The message test. If this is null or undefined, then |
| 71 // attempt to set the element with id 'statusField' to the value of |
| 72 // |statusText|. |
| 73 function updateStatus(opt_message) { |
| 74 if (opt_message) |
| 75 statusText = opt_message; |
| 76 var statusField = document.getElementById('statusField'); |
| 77 if (statusField) { |
| 78 statusField.innerHTML = statusText; |
| 79 } |
| 80 } |
| 81 </script> |
| 82 </head> |
| 83 <body onload="pageDidLoad()"> |
| 84 |
| 85 <h1>Native Client Simple Module</h1> |
| 86 <h2>Status: <code id="statusField">NO-STATUS</code></h2> |
| 87 <!-- The <EMBED> element is wrapped inside a <DIV>, which has both a 'load' |
| 88 and a 'message' event listener attached. This wrapping method is used |
| 89 instead of attaching the event listeners directly to the <EMBED> element to |
| 90 ensure that the listeners are active before the NaCl module 'load' event |
| 91 fires. This also allows you to use PPB_Messaging.PostMessage() (in C) or |
| 92 pp::Instance.PostMessage() (in C++) from within the initialization code in |
| 93 your NaCl module. |
| 94 |
| 95 The src points to a manifest file, which provides the Native Client plug-in |
| 96 a mapping between architecture and NaCl Executable (NEXE). |
| 97 |
| 98 We use a non-zero sized embed to give Chrome space to place the bad plug-in |
| 99 graphic, if there is a problem. |
| 100 --> |
| 101 <div id="listener"> |
| 102 <script type="text/javascript"> |
| 103 var listener = document.getElementById('listener') |
| 104 listener.addEventListener('load', moduleDidLoad, true); |
| 105 listener.addEventListener('message', handleMessage, true); |
| 106 </script> |
| 107 </div> |
| 108 </body> |
| 109 </html> |
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