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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.
*/
var kCompileMinMS = 100;
var editorEl = document.querySelector('.editor');
var outputEl = document.getElementById('output');
var selectEl = document.getElementById('select');
var downloadEl = document.getElementById('download');
var downloadLink = document.getElementById('downloadLink');
var binaryBuffer = null;
var binaryBlobUrl = null;
var wasmInstance = null;
var options = {mode: 'wast', lineNumbers: true};
var editor = CodeMirror.fromTextArea(editorEl, options);
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(text) {
wabt.ready.then(function() {
outputEl.textContent = '';
try {
var script = wabt.parseWast('test.wast', text);
script.resolveNames();
script.validate();
var binaryOutput = script.toBinary({log: true});
outputEl.textContent = binaryOutput.log;
binaryBuffer = binaryOutput.buffer;
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) {
outputEl.textContent += e.toString();
downloadEl.classList.add('disabled');
} finally {
if (script) script.destroy();
}
});
}
var compileInput =
debounce(function() { compile(editor.getValue()); }, kCompileMinMS);
function onEditorChange(e) {
compileInput();
}
function setExample(index) {
var contents = examples[index].contents;
editor.setValue(contents);
compileInput();
}
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);
}
editor.on('change', onEditorChange);
selectEl.addEventListener('change', onSelectChanged);
downloadEl.addEventListener('click', onDownloadClicked);
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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