001package 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
023import com.google.gwt.core.client.EntryPoint;
024import 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 */
032public 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}