001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.contrib.link;
016    
017    import org.apache.hivemind.service.BodyBuilder;
018    import org.apache.tapestry.IRequestCycle;
019    import org.apache.tapestry.PageRenderSupport;
020    import org.apache.tapestry.TapestryUtils;
021    import org.apache.tapestry.components.ILinkComponent;
022    import org.apache.tapestry.engine.ILink;
023    import org.apache.tapestry.link.DefaultLinkRenderer;
024    
025    /**
026     * This renderer emits javascript to launch the link in a window.
027     * 
028     * @author David Solis
029     * @since 3.0.1
030     */
031    public class PopupLinkRenderer extends DefaultLinkRenderer
032    {
033    
034        private String _windowName;
035    
036        private String _features;
037    
038        public PopupLinkRenderer()
039        {
040        }
041    
042        /**
043         * Initializes the name and features for javascript window.open function.
044         * 
045         * @param windowName
046         *            the window name
047         * @param features
048         *            the window features
049         */
050        public PopupLinkRenderer(String windowName, String features)
051        {
052            _windowName = windowName;
053            _features = features;
054        }
055    
056        /**
057         * @see DefaultLinkRenderer#constructURL(org.apache.tapestry.components.ILinkComponent,
058         *      org.apache.tapestry.IRequestCycle)
059         */
060        protected String constructURL(ILinkComponent component, IRequestCycle cycle)
061        {
062            if (cycle.isRewinding())
063            {
064                return null;
065            }
066            
067            String anchor = component.getAnchor();
068            ILink link = component.getLink(cycle);
069    
070            String url = link.getURL(anchor, true);
071    
072            PageRenderSupport support = TapestryUtils.getPageRenderSupport(cycle, component);
073    
074            String functionName = support.getUniqueString("popup_window");
075    
076            BodyBuilder builder = new BodyBuilder();
077    
078            builder.addln("{0}=function()", functionName);
079            builder.begin();
080            builder.add(
081                    "var newWindow = window.open({0}, {1}, {2});",
082                    TapestryUtils.enquote(url),
083                    TapestryUtils.enquote(getWindowName()),
084                    TapestryUtils.enquote(getFeatures()));
085            builder.add("newWindow.focus();");
086            builder.end();
087            builder.addln(";");
088    
089            support.addBodyScript(component, builder.toString());
090    
091            return "javascript:" + functionName + "();";
092        }
093    
094        public String getWindowName()
095        {
096            return _windowName;
097        }
098    
099        public void setWindowName(String windowName)
100        {
101            _windowName = windowName;
102        }
103    
104        public String getFeatures()
105        {
106            return _features;
107        }
108    
109        public void setFeatures(String features)
110        {
111            _features = features;
112        }
113    }