001    package org.gwtbootstrap3.client;
002    
003    /*
004     * #%L
005     * GwtBootstrap3
006     * %%
007     * Copyright (C) 2013 - 2015 GwtBootstrap3
008     * %%
009     * Licensed under the Apache License, Version 2.0 (the "License");
010     * you may not use this file except in compliance with the License.
011     * You may obtain a copy of the License at
012     * 
013     *      http://www.apache.org/licenses/LICENSE-2.0
014     * 
015     * Unless required by applicable law or agreed to in writing, software
016     * distributed under the License is distributed on an "AS IS" BASIS,
017     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018     * See the License for the specific language governing permissions and
019     * limitations under the License.
020     * #L%
021     */
022    
023    import com.google.gwt.core.client.EntryPoint;
024    import com.google.gwt.core.client.ScriptInjector;
025    
026    /**
027     * Provides script injection for jQuery and boostrap if they aren't already loaded.
028     * 
029     * @author Sven Jacobs
030     * @author Steven Jardine
031     */
032    public class GwtBootstrap3EntryPoint implements EntryPoint {
033    
034        /**
035         * Check to see if Boostrap is loaded already.
036         * 
037         * @return true is Boostreap loaded, false otherwise.
038         */
039        private native boolean isBootstrapLoaded() /*-{
040            return typeof $wnd['jQuery'].fn.emulateTransitionEnd !== 'undefined'
041        }-*/;
042    
043        /**
044         * Check to see if jQuery is loaded already
045         *
046         * @return true is jQuery is loaded, false otherwise
047         */
048        private native boolean isjQueryLoaded() /*-{
049            return (typeof $wnd['jQuery'] !== 'undefined');
050        }-*/;
051    
052        /** {@inheritDoc} */
053        @Override
054        public void onModuleLoad() {
055            if (!isjQueryLoaded()) {
056                ScriptInjector.fromString(GwtBootstrap3ClientBundle.INSTANCE.jQuery().getText())
057                        .setWindow(ScriptInjector.TOP_WINDOW)
058                        .inject();
059            }
060    
061            if (!isBootstrapLoaded()) {
062                ScriptInjector.fromString(GwtBootstrap3ClientBundle.INSTANCE.bootstrap().getText())
063                    .setWindow(ScriptInjector.TOP_WINDOW)
064                    .inject();
065            }
066        }
067        
068    }