81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
var bundleFn = arguments[3];
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var sources = arguments[4];
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var cache = arguments[5];
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var stringify = JSON.stringify;
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module.exports = function (fn, options) {
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var wkey;
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var cacheKeys = Object.keys(cache);
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for (var i = 0, l = cacheKeys.length; i < l; i++) {
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var key = cacheKeys[i];
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var exp = cache[key].exports;
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// Using babel as a transpiler to use esmodule, the export will always
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// be an object with the default export as a property of it. To ensure
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// the existing api and babel esmodule exports are both supported we
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// check for both
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if (exp === fn || exp && exp.default === fn) {
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wkey = key;
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break;
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}
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}
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if (!wkey) {
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wkey = Math.floor(Math.pow(16, 8) * Math.random()).toString(16);
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var wcache = {};
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for (var i = 0, l = cacheKeys.length; i < l; i++) {
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var key = cacheKeys[i];
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wcache[key] = key;
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}
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sources[wkey] = [
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'function(require,module,exports){' + fn + '(self); }',
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wcache
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];
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}
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var skey = Math.floor(Math.pow(16, 8) * Math.random()).toString(16);
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var scache = {}; scache[wkey] = wkey;
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sources[skey] = [
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'function(require,module,exports){' +
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// try to call default if defined to also support babel esmodule exports
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'var f = require(' + stringify(wkey) + ');' +
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'(f.default ? f.default : f)(self);' +
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'}',
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scache
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];
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var workerSources = {};
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resolveSources(skey);
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function resolveSources(key) {
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workerSources[key] = true;
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for (var depPath in sources[key][1]) {
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var depKey = sources[key][1][depPath];
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if (!workerSources[depKey]) {
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resolveSources(depKey);
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}
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}
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}
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var src = '(' + bundleFn + ')({'
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+ Object.keys(workerSources).map(function (key) {
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return stringify(key) + ':['
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+ sources[key][0]
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+ ',' + stringify(sources[key][1]) + ']'
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;
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}).join(',')
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+ '},{},[' + stringify(skey) + '])'
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;
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var URL = window.URL || window.webkitURL || window.mozURL || window.msURL;
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var blob = new Blob([src], { type: 'text/javascript' });
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if (options && options.bare) { return blob; }
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var workerUrl = URL.createObjectURL(blob);
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var worker = new Worker(workerUrl);
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worker.objectURL = workerUrl;
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return worker;
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};
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