Source Code Cross Referenced for TreeRenderer.java in  » J2EE » fleXive » com » flexive » faces » components » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » fleXive » com.flexive.faces.components 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /***************************************************************
002:         *  This file is part of the [fleXive](R) project.
003:         *
004:         *  Copyright (c) 1999-2007
005:         *  UCS - unique computing solutions gmbh (http://www.ucs.at)
006:         *  All rights reserved
007:         *
008:         *  The [fleXive](R) project is free software; you can redistribute
009:         *  it and/or modify it under the terms of the GNU General Public
010:         *  License as published by the Free Software Foundation;
011:         *  either version 2 of the License, or (at your option) any
012:         *  later version.
013:         *
014:         *  The GNU General Public License can be found at
015:         *  http://www.gnu.org/copyleft/gpl.html.
016:         *  A copy is found in the textfile GPL.txt and important notices to the
017:         *  license from the author are found in LICENSE.txt distributed with
018:         *  these libraries.
019:         *
020:         *  This library is distributed in the hope that it will be useful,
021:         *  but WITHOUT ANY WARRANTY; without even the implied warranty of
022:         *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
023:         *  GNU General Public License for more details.
024:         *
025:         *  For further information about UCS - unique computing solutions gmbh,
026:         *  please see the company website: http://www.ucs.at
027:         *
028:         *  For further information about [fleXive](R), please see the
029:         *  project website: http://www.flexive.org
030:         *
031:         *
032:         *  This copyright notice MUST APPEAR in all copies of the file!
033:         ***************************************************************/package com.flexive.faces.components;
034:
035:        import com.flexive.faces.FxJsfUtils;
036:        import com.flexive.faces.JsfRelativeUriMapper;
037:        import com.flexive.faces.beans.PluginRegistryBean;
038:        import com.flexive.faces.javascript.FxJavascriptUtils;
039:        import com.flexive.faces.javascript.RelativeUriMapper;
040:        import com.flexive.faces.javascript.menu.MenuWriter;
041:        import com.flexive.faces.javascript.tree.TreeNodeWriter;
042:        import com.flexive.faces.plugin.ExtensionPoint;
043:        import com.flexive.faces.plugin.TreePluginExecutor;
044:        import org.apache.commons.lang.StringUtils;
045:
046:        import javax.faces.component.UIComponent;
047:        import javax.faces.context.FacesContext;
048:        import javax.faces.context.ResponseWriter;
049:        import javax.faces.render.Renderer;
050:        import java.io.IOException;
051:        import java.util.*;
052:
053:        public class TreeRenderer extends Renderer {
054:            /**
055:             * Property set for dynamic javascript includes - enables embedded tree
056:             * renderers to use the main tree nodewriter.
057:             */
058:            public static final String PROP_NODEWRITER = "treeNodeWriter";
059:
060:            /**
061:             * Extended tree writer that injects tree nodes generated by plugins
062:             * in the rendered tree.
063:             */
064:            private static class PluginAwareTreeWriter extends TreeNodeWriter {
065:                private final Map<String, List<Node>> injectedNodes;
066:                private final Stack<String> nodeStack = new Stack<String>();
067:
068:                private PluginAwareTreeWriter(java.io.Writer out,
069:                        RelativeUriMapper uriMapper, NodeFormatter formatter,
070:                        Map<String, List<Node>> injectedNodes)
071:                        throws IOException {
072:                    super (out, uriMapper, formatter);
073:                    this .injectedNodes = new HashMap<String, List<Node>>(
074:                            injectedNodes);
075:                }
076:
077:                @Override
078:                public void startNode(Node node) throws IOException {
079:                    super .startNode(node);
080:                    nodeStack.push(node.getId());
081:                }
082:
083:                @Override
084:                public void closeChildren() throws IOException {
085:                    writeInjectedNodes();
086:                    super .closeChildren();
087:                }
088:
089:                @Override
090:                public void closeNode() throws IOException {
091:                    if (hasInjectedNodes()) {
092:                        // if there are nodes available, closeChildren() has not been called on this
093:                        // node, thus no children have been rendered yet
094:                        startChildren();
095:                        writeInjectedNodes();
096:                        closeChildren();
097:                    }
098:                    nodeStack.pop();
099:                    super .closeNode();
100:                }
101:
102:                @Override
103:                public void finishResponse() throws IOException {
104:                    writeInjectedNodes();
105:                    super .finishResponse();
106:                }
107:
108:                private void writeInjectedNodes() throws IOException {
109:                    final String parent = getCurrentParent();
110:                    if (injectedNodes.get(parent) != null) {
111:                        final List<Node> injected = injectedNodes
112:                                .remove(parent);
113:                        for (Node node : injected) {
114:                            writeNode(node);
115:                        }
116:                    }
117:                }
118:
119:                private boolean hasInjectedNodes() {
120:                    return injectedNodes.containsKey(getCurrentParent());
121:                }
122:
123:                private String getCurrentParent() {
124:                    return nodeStack.isEmpty() ? null : nodeStack.peek();
125:                }
126:            }
127:
128:            /**
129:             * {@inheritDoc}
130:             */
131:            @Override
132:            public boolean getRendersChildren() {
133:                return true;
134:            }
135:
136:            /**
137:             * {@inheritDoc}
138:             */
139:            @Override
140:            public void encodeBegin(FacesContext context, UIComponent component)
141:                    throws IOException {
142:                Tree tree = (Tree) component;
143:                ResponseWriter writer = context.getResponseWriter();
144:                FxJavascriptUtils.beginJavascript(writer);
145:                final String treeControllerWidget = (tree.isContentTree() ? "flexive.widget.FxTreeRpcController"
146:                        : "dojo.widget.TreeBasicControllerV3");
147:                writer.write("dojo.addOnLoad(function() {\n");
148:                FxJavascriptUtils.writeDojoRequires(writer,
149:                        "dojo.widget.TreeV3", StringUtils.replace(
150:                                treeControllerWidget, "flexive:", ""),
151:                        "dojo.widget.TreeSelectorV3",
152:                        "dojo.widget.TreeEmphasizeOnSelect",
153:                        "dojo.widget.TreeNodeV3",
154:                        "dojo.widget.TreeContextMenuV3",
155:                        "dojo.widget.TreeLinkExtension",
156:                        "dojo.widget.TreeDndControllerV3",
157:                        "dojo.widget.TreeEditor",
158:                        "dojo.widget.TreeDocIconExtension");
159:                writer.write("var controller = dojo.widget.createWidget(\""
160:                        + FxJavascriptUtils.getWidgetName(treeControllerWidget)
161:                        + "\"" + ",{RpcUrl: \""
162:                        + FxJsfUtils.getJsonServletUri() + "\"});\n"
163:                        + "var _listeners = [controller.widgetId];\n");
164:                addTreeExtension(writer, "selector", "TreeSelectorV3", true,
165:                        tree.isSelector());
166:                addTreeExtension(writer, "emphasize", "TreeEmphasizeOnSelect",
167:                        false, tree.isSelector(),
168:                        "{selector: selector.widgetId}");
169:                addTreeExtension(writer, "dnd", "TreeDndControllerV3", true,
170:                        tree.isDragAndDrop(), "{controller: controller}");
171:                addTreeExtension(writer, "docIcons", "TreeDocIconExtension",
172:                        true, tree.isDocIcons());
173:                if (tree.isEditor()) {
174:                    writer
175:                            .write("var editor = dojo.widget.createWidget(\"TreeEditor\");\n"
176:                                    + "controller.editor = editor;\n"
177:                                    + "editor.controller = controller;\n");
178:
179:                }
180:
181:                final Map<String, List<TreeNodeWriter.Node>> injectedNodes = new HashMap<String, List<TreeNodeWriter.Node>>();
182:                if (StringUtils.isNotBlank(tree.getExtensionPoint())) {
183:                    // execute plugins, populate injectedNodes map
184:                    TreePluginExecutor executor = new TreePluginExecutor() {
185:                        public void addNode(String parentNode,
186:                                TreeNodeWriter.Node node) {
187:                            if (!injectedNodes.containsKey(parentNode)) {
188:                                injectedNodes.put(parentNode,
189:                                        new ArrayList<TreeNodeWriter.Node>());
190:                            }
191:                            injectedNodes.get(parentNode).add(node);
192:                        }
193:                    };
194:                    PluginRegistryBean.getInstance().execute(
195:                            new ExtensionPoint<TreePluginExecutor>(tree
196:                                    .getExtensionPoint()) {
197:                            }, executor);
198:                }
199:
200:                writer.write("var children = ");
201:                // Tree JSON representation follows
202:                TreeNodeWriter nodeWriter = new PluginAwareTreeWriter(context
203:                        .getResponseWriter(), new JsfRelativeUriMapper(), tree
204:                        .isContentTree() ? TreeNodeWriter.FORMAT_CONTENTTREE
205:                        : tree.isDocIcons() ? TreeNodeWriter.FORMAT_PLAIN
206:                                : TreeNodeWriter.FORMAT_ADMINTREE,
207:                        injectedNodes);
208:                tree.setNodeWriter(nodeWriter);
209:            }
210:
211:            /**
212:             * {@inheritDoc}
213:             */
214:            @Override
215:            public void encodeChildren(FacesContext context,
216:                    UIComponent component) throws IOException {
217:                Tree tree = ((Tree) component);
218:                TreeNodeWriter nodeWriter = tree.getNodeWriter();
219:                for (Object child : component.getChildren()) {
220:                    if (child instanceof  TreeNode) {
221:                        TreeNode treeNode = (TreeNode) child;
222:                        treeNode.writeTreeNodes(nodeWriter);
223:                    } else if (child instanceof  JsonRpcCall) {
224:                        // indirect rendering through json-rpc call 
225:                        FxJsfUtils.getRequest().setAttribute(
226:                                TreeRenderer.PROP_NODEWRITER, nodeWriter);
227:                        JsonRpcCall rpcCall = (JsonRpcCall) child;
228:                        rpcCall.encodeBegin(context);
229:                        rpcCall.encodeEnd(context);
230:                    } else if (child instanceof  UIComponent) {
231:                        UIComponent childComponent = (UIComponent) child;
232:                        childComponent.encodeBegin(context);
233:                        childComponent.encodeChildren(context);
234:                        childComponent.encodeEnd(context);
235:                    }
236:                }
237:            }
238:
239:            /**
240:             * {@inheritDoc}
241:             */
242:            @Override
243:            public void encodeEnd(FacesContext context, UIComponent component)
244:                    throws IOException {
245:                Tree tree = (Tree) component;
246:                ResponseWriter writer = context.getResponseWriter();
247:                TreeNodeWriter nodeWriter = ((Tree) component).getNodeWriter();
248:
249:                nodeWriter.finishResponse();
250:
251:                // close "tree.setChildren"
252:                writer.write(";\n");
253:
254:                // init tree reporter (ignoring the context menu listener)
255:                writer.write("initializeTreeReporter(_listeners, "
256:                        + StringUtils.defaultString(tree.getClickHandler(),
257:                                "null") + ");\n");
258:                String widgetId = tree.getName();
259:
260:                if (tree.getContextMenu() != null) {
261:                    MenuWriter.writeMenu(writer, widgetId + "Menu",
262:                            "contextMenu", "TreeContextMenuV3",
263:                            "TreeMenuItemV3", tree.getContextMenu(),
264:                            new JsfRelativeUriMapper(), null, tree
265:                                    .getContextMenu().getShowHandler());
266:                    // add to tree listeners
267:                    writer.write("_listeners.push(contextMenu.widgetId);\n");
268:                }
269:
270:                writer
271:                        .write("var tree = dojo.widget.createWidget(\"TreeV3\", "
272:                                + "{widgetId: \""
273:                                + widgetId
274:                                + "\", listeners: _listeners\n"
275:                                + (tree.isDragAndDrop() ? ", DndAcceptTypes:\""
276:                                        + widgetId
277:                                        + "\", DndMode:\"between;onto\"" : "")
278:                                + "});\n"
279:                                + "tree.fxController = controller;\n"
280:                                + (tree.isSelector() ? "tree.fxSelector = selector;\n"
281:                                        : "")
282:                                + (tree.isDragAndDrop() ? "tree.dndController = dnd;\n"
283:                                        : "")
284:                                + "tree.setChildren(children);\n"
285:                                + (tree.isExpandFirstNode() ? "if (children.length > 0) tree.children[0].expand();\n"
286:                                        : ""));
287:                writer.write("document.getElementById(\"" + tree.getTargetId()
288:                        + "\").appendChild(tree.domNode);\n");
289:                // close "addOnLoad"
290:                writer.write("});\n");
291:                FxJavascriptUtils.endJavascript(writer);
292:
293:            }
294:
295:            private void addTreeExtension(ResponseWriter writer,
296:                    String varName, String widget, boolean addToListeners,
297:                    boolean rendered, String... args) throws IOException {
298:                if (!rendered) {
299:                    return;
300:                }
301:                writer.write("var "
302:                        + varName
303:                        + " = dojo.widget.createWidget(\""
304:                        + widget
305:                        + "\""
306:                        + (args.length > 0 ? "," + StringUtils.join(args, ',')
307:                                : "") + ");\n");
308:                if (addToListeners) {
309:                    writer
310:                            .write("_listeners.push(" + varName
311:                                    + ".widgetId);\n");
312:                }
313:            }
314:        }
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