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example.js
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example.js
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
function moduleDidLoad() {
common.hideModule();
}
function $(id) {
return document.getElementById(id);
}
// Called by the common.js module.
function domContentLoaded(name, tc, config, width, height) {
navigator.webkitPersistentStorage.requestQuota(10000000000,
function(bytes) {
common.updateStatus(
'Allocated ' + bytes + ' bytes of persistent storage. Running the first time will take 17 seconds to load');
common.attachDefaultListeners();
common.createNaClModule(name, tc, config, width, height);
},
function(e) { alert('Failed to allocate space') });
}
// Called by the common.js module.
function attachListeners() {
var radioEls = document.querySelectorAll('input[type="radio"]');
for (var i = 0; i < radioEls.length; ++i) {
radioEls[i].addEventListener('click', onRadioClicked);
}
// Wire up the 'click' event for each function's button.
var functionEls = document.querySelectorAll('.function');
for (var i = 0; i < functionEls.length; ++i) {
var functionEl = functionEls[i];
var id = functionEl.getAttribute('id');
var buttonEl = functionEl.querySelector('button');
// The function name matches the element id.
var func = window[id];
buttonEl.addEventListener('click', func);
}
//$('pipe_input_box').addEventListener('keypress', onPipeInput)
//$('pipe_output').disabled = true;
//$('pipe_name').addEventListener('change', function() { $('pipe_output').value = ''; })
}
// Called with keypress events on the pipe input box
function onPipeInput(e) {
// Create an arraybuffer containing the 16-bit char code
// from the keypress event.
var buffer = new ArrayBuffer(1*2);
var bufferView = new Uint16Array(buffer);
bufferView[0] = e.charCode;
// Pass the buffer in a dictionary over the NaCl module
var pipeSelect = $('pipe_name');
var pipeName = pipeSelect[pipeSelect.selectedIndex].value;
var message = {
pipe: pipeName,
operation: 'write',
payload: buffer,
};
nacl_module.postMessage(message);
e.preventDefault();
return false;
}
function onRadioClicked(e) {
var divId = this.id.slice(5); // skip "radio"
var functionEls = document.querySelectorAll('.function');
for (var i = 0; i < functionEls.length; ++i) {
var visible = functionEls[i].id === divId;
if (functionEls[i].id === divId)
functionEls[i].removeAttribute('hidden');
else
functionEls[i].setAttribute('hidden', '');
}
}
function addNameToSelectElements(cssClass, handle, name) {
var text = '[' + handle + '] ' + name;
var selectEls = document.querySelectorAll(cssClass);
for (var i = 0; i < selectEls.length; ++i) {
var optionEl = document.createElement('option');
optionEl.setAttribute('value', handle);
optionEl.appendChild(document.createTextNode(text));
selectEls[i].appendChild(optionEl);
}
}
function removeNameFromSelectElements(cssClass, handle) {
var optionEls = document.querySelectorAll(cssClass + ' > option');
for (var i = 0; i < optionEls.length; ++i) {
var optionEl = optionEls[i];
if (optionEl.value == handle) {
var selectEl = optionEl.parentNode;
selectEl.removeChild(optionEl);
}
}
}
var funcToCallback = {};
function postCall(func) {
var callback = arguments[arguments.length - 1];
funcToCallback[func] = callback;
nacl_module.postMessage({
cmd: func,
args: Array.prototype.slice.call(arguments, 1, -1)
});
}
function ArrayBufferToString(buf) { return String.fromCharCode.apply(null, new Uint16Array(buf)); }
// Called by the common.js module.
function handleMessage(message_event) {
var data = message_event.data;
if ((typeof(data) === 'string' || data instanceof String)) {
common.logMessage(data);
}
else if (data instanceof Object)
{
var pipeName = data['pipe']
if ( pipeName !== undefined )
{
// Message for JavaScript I/O pipe
var operation = data['operation'];
if (operation == 'write') {
$('pipe_output').value += ArrayBufferToString(data['payload']);
} else if (operation == 'ack') {
common.logMessage(pipeName + ": ack:" + data['payload']);
} else {
common.logMessage('Got unexpected pipe operation: ' + operation);
}
}
else
{
// Result from a function call.
var params = data.args;
var funcName = data.cmd;
var callback = funcToCallback[funcName];
if (!callback)
{
common.logMessage('Error: Bad message ' + funcName + ' received from NaCl module.');
return;
}
delete funcToCallback[funcName];
callback.apply(null, params);
}
} else {
common.logMessage('Error: Unknow message `' + data + '` received from NaCl module.');
}
}