Index: third_party/polymer/components-chromium/core-shared-lib/core-shared-lib-extracted.js |
diff --git a/third_party/polymer/components-chromium/core-shared-lib/core-shared-lib-extracted.js b/third_party/polymer/components-chromium/core-shared-lib/core-shared-lib-extracted.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..93627ba7b95b60c1750916e9a783a2927844fe1e |
--- /dev/null |
+++ b/third_party/polymer/components-chromium/core-shared-lib/core-shared-lib-extracted.js |
@@ -0,0 +1,116 @@ |
+ |
+(function() { |
+ |
+ Polymer('core-shared-lib',{ |
+ |
+ notifyEvent: 'core-shared-lib-load', |
+ |
+ ready: function() { |
+ if (!this.url && this.defaultUrl) { |
+ this.url = this.defaultUrl; |
+ } |
+ }, |
+ |
+ urlChanged: function() { |
+ require(this.url, this, this.callbackName); |
+ }, |
+ |
+ provide: function() { |
+ this.async('notify'); |
+ }, |
+ |
+ notify: function() { |
+ this.fire(this.notifyEvent, arguments); |
+ } |
+ |
+ }); |
+ |
+ var apiMap = {}; |
+ |
+ function require(url, notifiee, callbackName) { |
+ // make hashable string form url |
+ var name = nameFromUrl(url); |
+ // lookup existing loader instance |
+ var loader = apiMap[name]; |
+ // create a loader as needed |
+ if (!loader) { |
+ loader = apiMap[name] = new Loader(name, url, callbackName); |
+ } |
+ loader.requestNotify(notifiee); |
+ } |
+ |
+ function nameFromUrl(url) { |
+ return url.replace(/[\:\/\%\?\&\.\=\-]/g, '_') + '_api'; |
+ } |
+ |
+ var Loader = function(name, url, callbackName) { |
+ this.instances = []; |
+ this.callbackName = callbackName; |
+ if (this.callbackName) { |
+ window[this.callbackName] = this.success.bind(this); |
+ } else { |
+ if (url.indexOf(this.callbackMacro) >= 0) { |
+ this.callbackName = name + '_loaded'; |
+ window[this.callbackName] = this.success.bind(this); |
+ url = url.replace(this.callbackMacro, this.callbackName); |
+ } else { |
+ // TODO(sjmiles): we should probably fallback to listening to script.load |
+ throw 'core-shared-api: a %%callback%% parameter is required in the API url'; |
+ } |
+ } |
+ // |
+ this.addScript(url); |
+ }; |
+ |
+ Loader.prototype = { |
+ |
+ callbackMacro: '%%callback%%', |
+ loaded: false, |
+ |
+ addScript: function(src) { |
+ var script = document.createElement('script'); |
+ script.src = src; |
+ script.onerror = this.error.bind(this); |
+ var s = document.querySelector('script'); |
+ s.parentNode.insertBefore(script, s); |
+ this.script = script; |
+ }, |
+ |
+ removeScript: function() { |
+ if (this.script.parentNode) { |
+ this.script.parentNode.removeChild(this.script); |
+ } |
+ this.script = null; |
+ }, |
+ |
+ error: function() { |
+ this.cleanup(); |
+ }, |
+ |
+ success: function() { |
+ this.loaded = true; |
+ this.cleanup(); |
+ this.result = Array.prototype.slice.call(arguments); |
+ this.instances.forEach(this.provide, this); |
+ this.instances = null; |
+ }, |
+ |
+ cleanup: function() { |
+ delete window[this.callbackName]; |
+ }, |
+ |
+ provide: function(instance) { |
+ instance.notify(instance, this.result); |
+ }, |
+ |
+ requestNotify: function(instance) { |
+ if (this.loaded) { |
+ this.provide(instance); |
+ } else { |
+ this.instances.push(instance); |
+ } |
+ } |
+ |
+ }; |
+ |
+})(); |