org.wicketstuff.extjs.ExtBundleContribution.java Source code

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Here is the source code for org.wicketstuff.extjs.ExtBundleContribution.java

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/*
 *  Copyright (C) 2008 Paolo Di Tommaso
 *  paolo.ditommaso@gmail.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package org.wicketstuff.extjs;

import java.util.WeakHashMap;

import org.apache.wicket.Application;
import org.apache.wicket.RequestCycle;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.markup.html.IHeaderContributor;
import org.apache.wicket.markup.html.IHeaderResponse;

/**
 * Ext 2.2 bundle contributions factory
 *
 * @author Paolo Di Tommaso
 *
 */
public class ExtBundleContribution implements ExtContribution {

    private static final long serialVersionUID = 1L;

    transient WeakHashMap<String, ResourceReference> cache;

    IHeaderContributor[] contributions;

    private synchronized ResourceReference get(String resourceName) {
        ResourceReference result;
        if (cache == null || (result = cache.get(resourceName)) == null) {
            result = new ResourceReference(ExtBundleContribution.class, resourceName);
            if (cache == null) {
                cache = new WeakHashMap<String, ResourceReference>();
            }
            cache.put(resourceName, result);
        }
        return result;
    }

    public ResourceReference EXT_ALL_CSS() {
        return get("resources/css/ext-all.css");
    }

    public ResourceReference EXT_ALL_JS() {
        String resource = Application.get().getDebugSettings().isAjaxDebugModeEnabled() ? "ext-all-debug.js"
                : "ext-all.js";
        return get(resource);
    }

    public ResourceReference EXT_BASE_JS() {
        return get("adapter/ext/ext-base.js");
    }

    public ResourceReference EXT_BLANK() {
        return get("s.gif");
    }

    public IHeaderContributor[] getContributions() {
        if (contributions == null) {

            IHeaderContributor[] result = new IHeaderContributor[4];
            /*
             * Ext-all css
             */
            result[0] = new IHeaderContributor() {
                public void renderHead(IHeaderResponse response) {
                    response.renderCSSReference(EXT_ALL_CSS(), "screen");
                }
            };

            /*
             * Ext-base script
             */
            result[1] = new IHeaderContributor() {
                public void renderHead(IHeaderResponse response) {
                    response.renderJavascriptReference(EXT_BASE_JS());
                }
            };

            /*
             * Ext-all javascript
             */
            result[2] = new IHeaderContributor() {
                public void renderHead(IHeaderResponse response) {
                    response.renderJavascriptReference(EXT_ALL_JS());
                }
            };

            /*
             * Blank image resource
             */

            result[3] = new IHeaderContributor() {
                public void renderHead(IHeaderResponse response) {
                    String script = String.format("Ext.BLANK_IMAGE_URL='%s'",
                            RequestCycle.get().urlFor(EXT_BLANK()));
                    response.renderJavascript(script, null);
                }
            };

            contributions = result;
        }
        return contributions;
    }

}