org.apache.wicket.devutils.debugbar.PageSizeDebugPanel.java Source code

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Here is the source code for org.apache.wicket.devutils.debugbar.PageSizeDebugPanel.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.wicket.devutils.debugbar;

import org.apache.wicket.Component;
import org.apache.wicket.Page;
import org.apache.wicket.core.util.lang.WicketObjects;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.model.IModel;
import org.apache.wicket.request.resource.PackageResourceReference;
import org.apache.wicket.request.resource.ResourceReference;
import org.apache.wicket.util.lang.Bytes;

/**
 * A panel for the debug bar that shows the size of the currently shown page.
 * <p>
 * <strong>Note</strong>: this size includes the size of the debug bar itself too!
 */
public class PageSizeDebugPanel extends StandardDebugPanel {
    private static final long serialVersionUID = 1L;

    /** */
    public static final IDebugBarContributor DEBUG_BAR_CONTRIB = new IDebugBarContributor() {
        private static final long serialVersionUID = 1L;

        @Override
        public Component createComponent(final String id, final DebugBar debugBar) {
            return new PageSizeDebugPanel(id);
        }

    };

    /**
     * Construct.
     * 
     * @param id
     */
    public PageSizeDebugPanel(final String id) {
        super(id);
    }

    @Override
    protected Class<? extends Page> getLinkPageClass() {
        // not used
        return WebPage.class;
    }

    // Disable the link because there is no page with more detailed information
    @Override
    protected BookmarkablePageLink<Void> createLink(final String id) {
        BookmarkablePageLink<Void> bookmarkablePageLink = super.createLink(id);
        bookmarkablePageLink.setEnabled(false);
        return bookmarkablePageLink;
    }

    @Override
    protected ResourceReference getImageResourceReference() {
        // TODO: need better image for this:
        return new PackageResourceReference(SessionSizeDebugPanel.class, "harddrive.png");
    }

    @Override
    protected IModel<String> getDataModel() {
        return new IModel<String>() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getObject() {
                Page enclosingPage = getPage();
                long pageSize = WicketObjects.sizeof(enclosingPage);
                Bytes pageSizeInBytes = (pageSize > -1 ? Bytes.bytes(pageSize) : null);
                String pageSizeAsString = pageSizeInBytes != null ? pageSizeInBytes.toString() : "unknown";

                return "Page: " + pageSizeAsString;
            }
        };
    }
}