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| 1 /* |
| 2 * Copyright 2013 The Polymer Authors. All rights reserved. |
| 3 * Use of this source code is governed by a BSD-style |
| 4 * license that can be found in the LICENSE file. |
| 5 */ |
| 6 |
| 7 (function() { |
| 8 |
| 9 var scope = window.Loader = {}; |
| 10 var flags = {}; |
| 11 |
| 12 // convert url arguments to flags |
| 13 |
| 14 if (!flags.noOpts) { |
| 15 location.search.slice(1).split('&').forEach(function(o) { |
| 16 o = o.split('='); |
| 17 o[0] && (flags[o[0]] = o[1] || true); |
| 18 }); |
| 19 } |
| 20 |
| 21 // process global logFlags |
| 22 |
| 23 parseLogFlags(flags); |
| 24 |
| 25 function load(scopeName) { |
| 26 // imports |
| 27 |
| 28 var scope = window[scopeName]; |
| 29 var entryPointName = scope.entryPointName; |
| 30 var processFlags = scope.processFlags; |
| 31 |
| 32 // acquire attributes and base path from entry point |
| 33 |
| 34 var entryPoint = findScript(entryPointName); |
| 35 var base = entryPoint.basePath; |
| 36 |
| 37 // acquire common flags |
| 38 var flags = Loader.flags; |
| 39 |
| 40 // convert attributes to flags |
| 41 var flags = Loader.flags; |
| 42 for (var i=0, a; (a=entryPoint.attributes[i]); i++) { |
| 43 if (a.name !== 'src') { |
| 44 flags[a.name] = a.value || true; |
| 45 } |
| 46 } |
| 47 |
| 48 // parse log flags into global |
| 49 parseLogFlags(flags); |
| 50 |
| 51 // exports |
| 52 |
| 53 scope.basePath = base; |
| 54 scope.flags = flags; |
| 55 |
| 56 // process flags for dynamic dependencies |
| 57 |
| 58 if (processFlags) { |
| 59 processFlags.call(scope, flags); |
| 60 } |
| 61 |
| 62 // post-process imports |
| 63 |
| 64 var modules = scope.modules || []; |
| 65 var sheets = scope.sheets || []; |
| 66 |
| 67 // write script tags for dependencies |
| 68 |
| 69 modules.forEach(function(src) { |
| 70 document.write('<script src="' + base + src + '"></script>'); |
| 71 }); |
| 72 |
| 73 // write link tags for styles |
| 74 |
| 75 sheets.forEach(function(src) { |
| 76 document.write('<link rel="stylesheet" href="' + base + src + '">'); |
| 77 }); |
| 78 } |
| 79 |
| 80 // utility method |
| 81 |
| 82 function findScript(fileName) { |
| 83 var script = document.querySelector('script[src*="' + fileName + '"]'); |
| 84 var src = script.attributes.src.value; |
| 85 script.basePath = src.slice(0, src.indexOf(fileName)); |
| 86 return script; |
| 87 } |
| 88 |
| 89 function parseLogFlags(flags) { |
| 90 var logFlags = window.logFlags = window.logFlags || {}; |
| 91 if (flags.log) { |
| 92 flags.log.split(',').forEach(function(f) { |
| 93 logFlags[f] = true; |
| 94 }); |
| 95 } |
| 96 } |
| 97 |
| 98 scope.flags = flags; |
| 99 scope.load = load; |
| 100 |
| 101 })(); |
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