| /* |
| * Copyright (c) 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| /* |
| * $Id: MenuTreeRenderer.java,v 1.3 2004/11/14 07:33:15 tcfujii Exp $ |
| */ |
| |
| package components.renderkit; |
| |
| |
| import components.components.GraphComponent; |
| import components.model.Graph; |
| import components.model.Node; |
| |
| import jakarta.faces.FacesException; |
| import jakarta.faces.component.UIComponent; |
| import jakarta.faces.context.FacesContext; |
| import jakarta.faces.context.ResponseWriter; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| /** |
| * <p>Render our current value (which must be a <code>Graph</code>) |
| * as a tree control, with individual nodes expanded or contracted based on |
| * their current status.</p> |
| */ |
| |
| public class MenuTreeRenderer extends MenuBarRenderer { |
| |
| /** |
| * The names of tree state images that we need. |
| */ |
| public static final String IMAGE_HANDLE_DOWN_LAST = "handledownlast.gif"; |
| public static final String IMAGE_HANDLE_DOWN_MIDDLE = "handledownmiddle.gif"; |
| public static final String IMAGE_HANDLE_RIGHT_LAST = "handlerightlast.gif"; |
| public static final String IMAGE_HANDLE_RIGHT_MIDDLE = "handlerightmiddle.gif"; |
| public static final String IMAGE_LINE_LAST = "linelastnode.gif"; |
| public static final String IMAGE_LINE_MIDDLE = "linemiddlenode.gif"; |
| public static final String IMAGE_LINE_VERTICAL = "linevertical.gif"; |
| |
| String imageLocation = null; |
| |
| |
| public void encodeEnd(FacesContext context, UIComponent component) |
| throws IOException { |
| Graph graph = null; |
| // Acquire the root node of the graph representing the menu |
| graph = (Graph) ((GraphComponent) component).getValue(); |
| if (graph == null) { |
| throw new FacesException("Graph could not be located"); |
| } |
| Node root = graph.getRoot(); |
| if (root == null) { |
| throw new FacesException("Graph has no root node"); |
| } |
| if (root.getChildCount() < 1) { |
| return; // Nothing to render |
| } |
| this.component = component; |
| this.context = context; |
| clientId = component.getClientId(context); |
| imageLocation = getImagesLocation(context); |
| |
| treeClass = (String) component.getAttributes().get("graphClass"); |
| selectedClass = (String) component.getAttributes().get("selectedClass"); |
| unselectedClass = |
| (String) component.getAttributes().get("unselectedClass"); |
| |
| ResponseWriter writer = context.getResponseWriter(); |
| |
| writer.write("<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\""); |
| if (treeClass != null) { |
| writer.write(" class=\""); |
| writer.write(treeClass); |
| writer.write("\""); |
| } |
| writer.write(">"); |
| writer.write("\n"); |
| |
| int level = 0; |
| encodeNode(writer, root, level, root.getDepth(), true); |
| writer.write("<input type=\"hidden\" name=\"" + clientId + "\" />"); |
| writer.write("</table>"); |
| writer.write("\n"); |
| } |
| |
| |
| protected void encodeNode(ResponseWriter writer, Node node, |
| int level, int width, boolean last) |
| throws IOException { |
| |
| // Render the beginning of this node |
| writer.write(" <tr valign=\"middle\">"); |
| |
| // Create the appropriate number of indents |
| for (int i = 0; i < level; i++) { |
| int levels = level - i; |
| Node parent = node; |
| for (int j = 1; j <= levels; j++) |
| parent = parent.getParent(); |
| if (parent.isLast()) |
| writer.write(" <td></td>"); |
| else { |
| writer.write(" <td><img src=\""); |
| writer.write(imageLocation); |
| writer.write("/"); |
| writer.write(IMAGE_LINE_VERTICAL); |
| writer.write("\" border=\"0\"></td>"); |
| } |
| writer.write("\n"); |
| } |
| |
| // Render the tree state image for this node. use the "onmousedown" event |
| // handler to track which node was clicked. The images are rendered |
| // as links. |
| writer.write(" <td>"); |
| if (!node.isLeaf()) { |
| // The image links of the nodes that have children behave like |
| // command buttons causing the form to be submitted so the state of |
| // node can be toggled |
| writer.write("<a href=\""); |
| writer.write(getSubmitScript(node.getPath(), context)); |
| writer.write(" >"); |
| writer.write("<img src=\""); |
| writer.write(imageLocation); |
| writer.write("/"); |
| if (node.isLast()) { |
| writer.write(IMAGE_HANDLE_RIGHT_LAST); |
| } else { |
| writer.write(IMAGE_HANDLE_RIGHT_MIDDLE); |
| } |
| writer.write("\" border=\"0\">"); |
| writer.write("</a>"); |
| writer.write("</td>"); |
| } else { |
| writer.write("<img src=\""); |
| writer.write(imageLocation); |
| writer.write("/"); |
| if (node.isLeaf()) { |
| if (node.isLast()) { |
| writer.write(IMAGE_LINE_LAST); |
| } else { |
| writer.write(IMAGE_LINE_MIDDLE); |
| } |
| } else if (node.isExpanded()) { |
| if (node.isLast()) { |
| writer.write(IMAGE_HANDLE_DOWN_LAST); |
| } else { |
| writer.write(IMAGE_HANDLE_DOWN_MIDDLE); |
| } |
| } |
| writer.write("\" border=\"0\">"); |
| writer.write("</td>"); |
| } |
| |
| // Render the icon for this node (if any) |
| writer.write(" <td colspan=\""); |
| writer.write(String.valueOf(width - level + 1)); |
| writer.write("\">"); |
| if (node.getIcon() != null) { |
| // Label and action link |
| // Note: we assume that the links do not act as command button, |
| // meaning they do not cause the form to be submitted. |
| if (node.getAction() != null) { |
| writer.write("<a href=\""); |
| writer.write(href(node.getAction())); |
| writer.write("\">"); |
| } |
| writer.write("<img src=\""); |
| writer.write(imageLocation); |
| writer.write("/"); |
| writer.write(node.getIcon()); |
| writer.write("\" border=\"0\">"); |
| if (node.getAction() != null) { |
| writer.write("</a>"); |
| } |
| } |
| // Render the label for this node (if any) as link. |
| if (node.getLabel() != null) { |
| writer.write(" "); |
| String labelStyle = null; |
| if (node.isSelected() && (selectedClass != null)) { |
| labelStyle = selectedClass; |
| } else if (!node.isSelected() && (unselectedClass != null)) { |
| labelStyle = unselectedClass; |
| } |
| if (node.isEnabled()) { |
| // Note: we assume that the links do not act as command button, |
| // meaning they do not cause the form to be submitted. |
| writer.write("<a href=\""); |
| writer.write(href(node.getAction())); |
| writer.write("\""); |
| if (labelStyle != null) { |
| writer.write(" class=\""); |
| writer.write(labelStyle); |
| writer.write("\""); |
| } |
| writer.write(">"); |
| } else if (labelStyle != null) { |
| writer.write("<span class=\""); |
| writer.write(labelStyle); |
| writer.write("\">"); |
| } |
| writer.write(node.getLabel()); |
| if (node.getLabel() != null) { |
| writer.write("</a>"); |
| } else if (labelStyle != null) { |
| writer.write("</span>"); |
| } |
| } |
| writer.write("</td>"); |
| writer.write("\n"); |
| |
| // Render the end of this node |
| writer.write(" </tr>"); |
| writer.write("\n"); |
| |
| // Render the children of this node |
| if (node.isExpanded()) { |
| Iterator children = node.getChildren(); |
| int lastIndex = (node.getChildCount()) - 1; |
| int newLevel = level + 1; |
| while (children.hasNext()) { |
| Node nextChild = (Node) children.next(); |
| boolean lastNode = nextChild.isLast(); |
| encodeNode(writer, nextChild, newLevel, width, lastNode); |
| } |
| } |
| } |
| |
| |
| /** |
| * Returns the location of images by looking up the servlet context |
| * init parameter. If parameter is not found, default to "/images". |
| * Image location can be configured by setting this property. |
| */ |
| protected String getImagesLocation(FacesContext context) { |
| StringBuffer sb = new StringBuffer(); |
| |
| // First, add the context path |
| String contextPath = context.getExternalContext() |
| .getRequestContextPath(); |
| sb.append(contextPath); |
| |
| // Next, add the images directory path |
| Map initParameterMap = context.getExternalContext() |
| .getInitParameterMap(); |
| String images = (String) initParameterMap.get("tree.control.images"); |
| if (images == null) { |
| images = "/images"; |
| } |
| sb.append(images); |
| return (sb.toString()); |
| } |
| |
| |
| } |
