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/* * Copyright (c) 1998, 1999, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.tools.example.debug.gui; import java.io.*;import java.util.*; import javax.swing.*;import javax.swing.tree.*;import java.awt.*;import java.awt.event.*; import com.sun.tools.example.debug.bdi.*; public class SourceTreeTool extends JPanel {     private static final long serialVersionUID = 3336680912107956419L;     private Environment env;     private ExecutionManager runtime;    private SourceManager sourceManager;    private ClassManager classManager;     private JTree tree;    private SourceTreeNode root;    private SearchPath sourcePath;    private CommandInterpreter interpreter;     private static String HEADING = "SOURCES";     public SourceTreeTool(Environment env) {         super(new BorderLayout());         this.env = env;        this.runtime = env.getExecutionManager();        this.sourceManager = env.getSourceManager();         this.interpreter = new CommandInterpreter(env);         sourcePath = sourceManager.getSourcePath();        root = createDirectoryTree(HEADING);         // Create a tree that allows one selection at a time.        tree = new JTree(new DefaultTreeModel(root));        tree.setSelectionModel(new SingleLeafTreeSelectionModel());         /******        // Listen for when the selection changes.        tree.addTreeSelectionListener(new TreeSelectionListener() {            public void valueChanged(TreeSelectionEvent e) {                SourceTreeNode node = (SourceTreeNode)                    (e.getPath().getLastPathComponent());                interpreter.executeCommand("view " + node.getRelativePath());            }        });        ******/         MouseListener ml = new MouseAdapter() {            @Override            public void mouseClicked(MouseEvent e) {                int selRow = tree.getRowForLocation(e.getX(), e.getY());                TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());                if(selRow != -1) {                    if(e.getClickCount() == 1) {                        SourceTreeNode node =                            (SourceTreeNode)selPath.getLastPathComponent();                        // If user clicks on leaf, select it, and issue 'view' command.                        if (node.isLeaf()) {                            tree.setSelectionPath(selPath);                            interpreter.executeCommand("view " + node.getRelativePath());                        }                    }                }            }        };        tree.addMouseListener(ml);         JScrollPane treeView = new JScrollPane(tree);        add(treeView);         // Create listener for source path changes.         SourceTreeToolListener listener = new SourceTreeToolListener();        sourceManager.addSourceListener(listener);         //### remove listeners on exit!    }     private class SourceTreeToolListener implements SourceListener {         @Override        public void sourcepathChanged(SourcepathChangedEvent e) {            sourcePath = sourceManager.getSourcePath();            root = createDirectoryTree(HEADING);            tree.setModel(new DefaultTreeModel(root));        }     }     private static class SourceOrDirectoryFilter implements FilenameFilter {        @Override        public boolean accept(File dir, String name) {            return (name.endsWith(".java") ||                    new File(dir, name).isDirectory());        }    }     private static FilenameFilter filter = new SourceOrDirectoryFilter();     SourceTreeNode createDirectoryTree(String label) {        try {            return new SourceTreeNode(label, null, "", true);        } catch (SecurityException e) {            env.failure("Cannot access source file or directory");            return null;        }    }      class SourceTreeNode implements TreeNode {         private String name;        private boolean isDirectory;        private SourceTreeNode parent;        private SourceTreeNode[] children;        private String relativePath;        private boolean isExpanded;         private SourceTreeNode(String label,                               SourceTreeNode parent,                               String relativePath,                               boolean isDirectory) {            this.name = label;            this.relativePath = relativePath;            this.parent = parent;            this.isDirectory = isDirectory;        }         @Override        public String toString() {            return name;        }         public String getRelativePath() {            return relativePath;        }         private void expandIfNeeded() {            try {                if (!isExpanded && isDirectory) {                    String[] files = sourcePath.children(relativePath, filter);                    children = new SourceTreeNode[files.length];                    for (int i = 0; i < files.length; i++) {                        String childName =                            (relativePath.equals(""))                            ? files[i]                            : relativePath + File.separator + files[i];                        File file = sourcePath.resolve(childName);                        boolean isDir = (file != null && file.isDirectory());                        children[i] =                            new SourceTreeNode(files[i], this, childName, isDir);                    }                }                isExpanded = true;            } catch (SecurityException e) {                children = null;                env.failure("Cannot access source file or directory");            }        }         // -- interface TreeNode --         /*         * Returns the child <code>TreeNode</code> at index         * <code>childIndex</code>.         */        @Override        public TreeNode getChildAt(int childIndex) {            expandIfNeeded();            return children[childIndex];        }         /**         * Returns the number of children <code>TreeNode</code>s the receiver         * contains.         */        @Override        public int getChildCount() {            expandIfNeeded();            return children.length;        }         /**         * Returns the parent <code>TreeNode</code> of the receiver.         */        @Override        public TreeNode getParent() {            return parent;        }         /**         * Returns the index of <code>node</code> in the receivers children.         * If the receiver does not contain <code>node</code>, -1 will be         * returned.         */        @Override        public int getIndex(TreeNode node) {            expandIfNeeded();            for (int i = 0; i < children.length; i++) {                if (children[i] == node) {                    return i;            }            }            return -1;        }         /**         * Returns true if the receiver allows children.         */        @Override        public boolean getAllowsChildren() {            return isDirectory;        }         /**         * Returns true if the receiver is a leaf.         */        @Override        public boolean isLeaf() {            expandIfNeeded();            return !isDirectory;        }         /**         * Returns the children of the receiver as an Enumeration.         */        @Override        public Enumeration children() {            expandIfNeeded();            return new Enumeration() {                int i = 0;                @Override                public boolean hasMoreElements() {                    return (i < children.length);                }                @Override                public Object nextElement() throws NoSuchElementException {                    if (i >= children.length) {                        throw new NoSuchElementException();                    }                    return children[i++];                }            };        }     } }