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                return null;
064            }
065            
066            String anchor = component.getAnchor();
067            ILink link = component.getLink(cycle);
068    
069            String url = link.getURL(anchor, true);
070    
071            PageRenderSupport support = TapestryUtils.getPageRenderSupport(cycle, component);
072    
073            String functionName = support.getUniqueString("popup_window");
074    
075            BodyBuilder builder = new BodyBuilder();
076    
077            builder.addln("function {0}()", functionName);
078            builder.begin();
079            builder.addln(
080                    "var newWindow = window.open({0}, {1}, {2});",
081                    TapestryUtils.enquote(url),
082                    TapestryUtils.enquote(getWindowName()),
083                    TapestryUtils.enquote(getFeatures()));
084            builder.addln("newWindow.focus();");
085            builder.end();
086    
087            support.addBodyScript(component, builder.toString());
088    
089            return "javascript:" + functionName + "();";
090        }
091    
092        public String getWindowName()
093        {
094            return _windowName;
095        }
096    
097        public void setWindowName(String windowName)
098        {
099            _windowName = windowName;
100        }
101    
102        public String getFeatures()
103        {
104            return _features;
105        }
106    
107        public void setFeatures(String features)
108        {
109            _features = features;
110        }
111    }