/** * This base class can be used by derived classes to dynamically require Google API's. */Ext.define('Ext.ux.google.Api', { mixins: [ 'Ext.mixin.Mashup' ], requiredScripts: [ '//www.google.com/jsapi' ], statics: { loadedModules: { /* * feeds: [ callback1, callback2, .... ] transitions to -> feeds : true (when complete) */ } }, onClassExtended: function(cls, data, hooks) { var onBeforeClassCreated = hooks.onBeforeCreated, Api = this; // the Ext.ux.google.Api class hooks.onBeforeCreated = function(cls, data) { var me = this, apis = [], requiresGoogle = Ext.Array.from(data.requiresGoogle), loadedModules = Api.loadedModules, remaining = 0, callback = function() { if (! --remaining) { onBeforeClassCreated.call(me, cls, data, hooks); } Ext.env.Ready.unblock(); }, api, i, length; /* * requiresGoogle: [ * 'feeds', * { api: 'feeds', version: '1.x', * callback : fn, nocss : true } //optionals * ] */ length = requiresGoogle.length; for (i = 0; i < length; ++i) { if (Ext.isString(api = requiresGoogle[i])) { apis.push({ api: api }); } else if (Ext.isObject(api)) { apis.push(Ext.apply({}, api)); } } Ext.each(apis, function(api) { var name = api.api, version = String(api.version || '1.x'), module = loadedModules[name]; if (!module) { ++remaining; Ext.env.Ready.block(); loadedModules[name] = module = [ callback ].concat(api.callback || []); delete api.api; delete api.version; if (!window.google) { Ext.raise("'google' is not defined."); return false; } google.load( name, version, Ext.applyIf({ callback: function() { loadedModules[name] = true; for (var n = module.length; n-- > 0;) { module[n](); // iterate callbacks in reverse } } }, api) ); } else if (module !== true) { module.push(callback); } }); if (!remaining) { onBeforeClassCreated.call(me, cls, data, hooks); } }; }});