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/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Split(["#top-left", "#top-right"]);
Split(["#bottom-left", "#bottom-right"]);
Split(["#top-row", "#bottom-row"], {
direction: 'vertical'
});
var features = {};
WabtModule().then(function(wabt) {
var FEATURES = [
'exceptions',
'mutable_globals',
'sat_float_to_int',
'sign_extension',
'simd',
'threads',
'multi_value',
'tail_call',
'bulk_memory',
'reference_types',
];
var kCompileMinMS = 100;
var outputShowBase64 = false;
var outputLog;
var outputBase64;
var outputEl = document.getElementById('output');
var jsLogEl = document.getElementById('js_log');
var selectEl = document.getElementById('select');
var downloadEl = document.getElementById('download');
var downloadLink = document.getElementById('downloadLink');
var buildLogEl = document.getElementById('buildLog');
var base64El = document.getElementById('base64');
var binaryBuffer = null;
var binaryBlobUrl = null;
for (var feature of FEATURES) {
var featureEl = document.getElementById(feature);
features[feature] = featureEl.checked;
featureEl.addEventListener('change', event => {
var feature = event.target.id;
features[feature] = event.target.checked;
onWatChange();
});
}
var wasmInstance = null;
var wrappedConsole = Object.create(console);
wrappedConsole.log = (...args) => {
let line = args.map(String).join('') + '\n';
jsLogEl.textContent += line;
console.log(...args);
}
var watEditor = CodeMirror((elt) => {
document.getElementById('top-left').appendChild(elt);
}, {
mode: 'wast',
lineNumbers: true,
});
var jsEditor = CodeMirror((elt) => {
document.getElementById('bottom-left').appendChild(elt);
}, {
mode: 'javascript',
lineNumbers: true,
});
function debounce(f, wait) {
var lastTime = 0;
var timeoutId = -1;
var wrapped = function() {
var time = +new Date();
if (time - lastTime < wait) {
if (timeoutId == -1)
timeoutId = setTimeout(wrapped, (lastTime + wait) - time);
return;
}
if (timeoutId != -1)
clearTimeout(timeoutId);
timeoutId = -1;
lastTime = time;
f.apply(null, arguments);
};
return wrapped;
}
function compile() {
outputLog = '';
outputBase64 = 'Error occured, base64 output is not available';
var binaryOutput;
try {
var module = wabt.parseWat('test.wast', watEditor.getValue(), features);
module.resolveNames();
module.validate(features);
var binaryOutput = module.toBinary({log: true, write_debug_names:true});
outputLog = binaryOutput.log;
binaryBuffer = binaryOutput.buffer;
// binaryBuffer is a Uint8Array, so we need to convert it to a string to use btoa
// https://stackoverflow.com/questions/12710001/how-to-convert-uint8-array-to-base64-encoded-string
outputBase64 = btoa(String.fromCharCode.apply(null, binaryBuffer));
var blob = new Blob([binaryOutput.buffer]);
if (binaryBlobUrl) {
URL.revokeObjectURL(binaryBlobUrl);
}
binaryBlobUrl = URL.createObjectURL(blob);
downloadLink.setAttribute('href', binaryBlobUrl);
downloadEl.classList.remove('disabled');
} catch (e) {
outputLog += e.toString();
downloadEl.classList.add('disabled');
} finally {
if (module) module.destroy();
outputEl.textContent = outputShowBase64 ? outputBase64 : outputLog;
}
}
function run() {
jsLogEl.textContent = '';
if (binaryBuffer === null) return;
try {
let wasm = new WebAssembly.Module(binaryBuffer);
let js = jsEditor.getValue();
let fn = new Function('wasmModule', 'console', js + '//# sourceURL=demo.js');
fn(wasm, wrappedConsole);
} catch (e) {
jsLogEl.textContent += String(e);
}
}
var onWatChange = debounce(compile, kCompileMinMS);
var onJsChange = debounce(run, kCompileMinMS);
function setExample(index) {
var example = examples[index];
watEditor.setValue(example.contents);
onWatChange();
jsEditor.setValue(example.js);
onJsChange();
}
function onSelectChanged(e) {
setExample(this.selectedIndex);
}
function onDownloadClicked(e) {
// See https://developer.mozilla.com/en-US/docs/Web/API/MouseEvent
var event = new MouseEvent('click', {
view: window,
bubbles: true,
cancelable: true,
});
downloadLink.dispatchEvent(event);
}
function onBuildLogClicked(e) {
outputShowBase64 = false;
outputEl.textContent = outputLog;
buildLogEl.style.textDecoration = 'underline';
base64El.style.textDecoration = 'none';
}
function onBase64Clicked(e) {
outputShowBase64 = true;
outputEl.textContent = outputBase64;
buildLogEl.style.textDecoration = 'none';
base64El.style.textDecoration = 'underline';
}
watEditor.on('change', onWatChange);
jsEditor.on('change', onJsChange);
selectEl.addEventListener('change', onSelectChanged);
downloadEl.addEventListener('click', onDownloadClicked);
buildLogEl.addEventListener('click', onBuildLogClicked );
base64El.addEventListener('click', onBase64Clicked );
for (var i = 0; i < examples.length; ++i) {
var example = examples[i];
var option = document.createElement('option');
option.textContent = example.name;
selectEl.appendChild(option);
}
selectEl.selectedIndex = 1;
setExample(selectEl.selectedIndex);
});
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