139 lines
3.6 KiB
JavaScript
139 lines
3.6 KiB
JavaScript
/**
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* @fileOverview Runtime管理器，负责Runtime的选择, 连接
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*/
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define([
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'../base',
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'../mediator',
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'./runtime'
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], function( Base, Mediator, Runtime ) {
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var cache;
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cache = (function() {
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var obj = {};
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return {
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add: function( runtime ) {
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obj[ runtime.uid ] = runtime;
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},
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get: function( ruid, standalone ) {
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var i;
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if ( ruid ) {
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return obj[ ruid ];
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}
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for ( i in obj ) {
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// 有些类型不能重用，比如filepicker.
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if ( standalone && obj[ i ].__standalone ) {
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continue;
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}
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return obj[ i ];
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}
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return null;
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},
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remove: function( runtime ) {
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delete obj[ runtime.uid ];
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}
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};
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})();
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function RuntimeClient( component, standalone ) {
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var deferred = Base.Deferred(),
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runtime;
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this.uid = Base.guid('client_');
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// 允许runtime没有初始化之前，注册一些方法在初始化后执行。
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this.runtimeReady = function( cb ) {
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return deferred.done( cb );
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};
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this.connectRuntime = function( opts, cb ) {
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// already connected.
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if ( runtime ) {
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throw new Error('already connected!');
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}
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deferred.done( cb );
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if ( typeof opts === 'string' && cache.get( opts ) ) {
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runtime = cache.get( opts );
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}
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// 像filePicker只能独立存在，不能公用。
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runtime = runtime || cache.get( null, standalone );
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// 需要创建
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if ( !runtime ) {
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runtime = Runtime.create( opts, opts.runtimeOrder );
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runtime.__promise = deferred.promise();
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runtime.once( 'ready', deferred.resolve );
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runtime.init();
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cache.add( runtime );
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runtime.__client = 1;
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} else {
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// 来自cache
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Base.$.extend( runtime.options, opts );
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runtime.__promise.then( deferred.resolve );
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runtime.__client++;
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}
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standalone && (runtime.__standalone = standalone);
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return runtime;
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};
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this.getRuntime = function() {
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return runtime;
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};
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this.disconnectRuntime = function() {
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if ( !runtime ) {
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return;
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}
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runtime.__client--;
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if ( runtime.__client <= 0 ) {
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cache.remove( runtime );
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delete runtime.__promise;
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runtime.destroy();
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}
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runtime = null;
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};
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this.exec = function() {
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if ( !runtime ) {
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return;
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}
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var args = Base.slice( arguments );
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component && args.unshift( component );
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return runtime.exec.apply( this, args );
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};
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this.getRuid = function() {
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return runtime && runtime.uid;
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};
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this.destroy = (function( destroy ) {
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return function() {
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destroy && destroy.apply( this, arguments );
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this.trigger('destroy');
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this.off();
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this.exec('destroy');
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this.disconnectRuntime();
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};
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})( this.destroy );
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}
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Mediator.installTo( RuntimeClient.prototype );
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return RuntimeClient;
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}); |