sigmund@google.com
a634d8ffc7
R=jmesserly@google.com Review URL: https://codereview.chromium.org//20414002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@25505 260f80e4-7a28-3924-810f-c04153c831b5
102 lines
2.2 KiB
JavaScript
102 lines
2.2 KiB
JavaScript
/*
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* Copyright 2013 The Polymer Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style
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* license that can be found in the LICENSE file.
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*/
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(function() {
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var scope = window.Loader = {};
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var flags = {};
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// convert url arguments to flags
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if (!flags.noOpts) {
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location.search.slice(1).split('&').forEach(function(o) {
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o = o.split('=');
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o[0] && (flags[o[0]] = o[1] || true);
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});
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}
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// process global logFlags
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parseLogFlags(flags);
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function load(scopeName) {
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// imports
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var scope = window[scopeName];
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var entryPointName = scope.entryPointName;
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var processFlags = scope.processFlags;
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// acquire attributes and base path from entry point
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var entryPoint = findScript(entryPointName);
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var base = entryPoint.basePath;
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// acquire common flags
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var flags = Loader.flags;
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// convert attributes to flags
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var flags = Loader.flags;
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for (var i=0, a; (a=entryPoint.attributes[i]); i++) {
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if (a.name !== 'src') {
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flags[a.name] = a.value || true;
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}
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}
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// parse log flags into global
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parseLogFlags(flags);
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// exports
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scope.basePath = base;
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scope.flags = flags;
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// process flags for dynamic dependencies
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if (processFlags) {
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processFlags.call(scope, flags);
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}
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// post-process imports
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var modules = scope.modules || [];
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var sheets = scope.sheets || [];
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// write script tags for dependencies
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modules.forEach(function(src) {
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document.write('<script src="' + base + src + '"></script>');
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});
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// write link tags for styles
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sheets.forEach(function(src) {
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document.write('<link rel="stylesheet" href="' + base + src + '">');
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});
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}
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// utility method
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function findScript(fileName) {
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var script = document.querySelector('script[src*="' + fileName + '"]');
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var src = script.attributes.src.value;
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script.basePath = src.slice(0, src.indexOf(fileName));
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return script;
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}
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function parseLogFlags(flags) {
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var logFlags = window.logFlags = window.logFlags || {};
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if (flags.log) {
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flags.log.split(',').forEach(function(f) {
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logFlags[f] = true;
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});
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}
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}
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scope.flags = flags;
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scope.load = load;
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})();
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