aoqi@0: #// Usage: jjs -fx filebrowser.js -- <start_dir>
aoqi@0: 
aoqi@0: /*
aoqi@0:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
attila@962:  *
aoqi@0:  * Redistribution and use in source and binary forms, with or without
aoqi@0:  * modification, are permitted provided that the following conditions
aoqi@0:  * are met:
attila@962:  *
aoqi@0:  *   - Redistributions of source code must retain the above copyright
aoqi@0:  *     notice, this list of conditions and the following disclaimer.
attila@962:  *
aoqi@0:  *   - Redistributions in binary form must reproduce the above copyright
aoqi@0:  *     notice, this list of conditions and the following disclaimer in the
aoqi@0:  *     documentation and/or other materials provided with the distribution.
attila@962:  *
aoqi@0:  *   - Neither the name of Oracle nor the names of its
aoqi@0:  *     contributors may be used to endorse or promote products derived
aoqi@0:  *     from this software without specific prior written permission.
attila@962:  *
aoqi@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
aoqi@0:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
aoqi@0:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
aoqi@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
aoqi@0:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
aoqi@0:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
aoqi@0:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
aoqi@0:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
aoqi@0:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
aoqi@0:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
aoqi@0:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
aoqi@0:  */
aoqi@0: 
aoqi@0: // Uses -fx and javafx TreeView to visualize directories
aoqi@0: if (!$OPTIONS._fx) {
aoqi@0:     print("Usage: jjs -fx filebrowser.js -- <start_dir>");
aoqi@0:     exit(1);
aoqi@0: }
aoqi@0: 
aoqi@0: // Java classes used
aoqi@0: var File = Java.type("java.io.File");
aoqi@0: var Files = Java.type("java.nio.file.Files");
aoqi@0: 
aoqi@0: // check directory argument, if passed
aoqi@0: var dir = arguments.length > 0? new File(arguments[0]) : new File(".");
aoqi@0: if (! dir.isDirectory()) {
aoqi@0:     print(dir + " is not a directory!");
aoqi@0:     exit(2);
aoqi@0: }
aoqi@0: 
aoqi@0: // JavaFX classes used
aoqi@0: var FXCollections = Java.type("javafx.collections.FXCollections");
aoqi@0: var Scene     = Java.type("javafx.scene.Scene");
aoqi@0: var TreeItem  = Java.type("javafx.scene.control.TreeItem");
aoqi@0: var TreeView  = Java.type("javafx.scene.control.TreeView");
aoqi@0: 
aoqi@0: // create a subclass of JavaFX TreeItem class
aoqi@0: var LazyTreeItem = Java.extend(TreeItem);
aoqi@0: 
aoqi@0: // lazily filling children of a directory LazyTreeItem
aoqi@0: function buildChildren(dir) {
aoqi@0:     var children = FXCollections.observableArrayList();
aoqi@0:     var stream = Files.list(dir.toPath());
aoqi@0:     stream.forEach(function(path) {
aoqi@0:         var file = path.toFile();
aoqi@0:         var item = file.isDirectory()?
aoqi@0:             makeLazyTreeItem(file) : new TreeItem(file.name);
aoqi@0:         children.add(item);
aoqi@0:     });
aoqi@0:     stream.close();
aoqi@0:     return children;
aoqi@0: }
aoqi@0: 
aoqi@0: // create an instance LazyTreeItem with override methods
aoqi@0: function makeLazyTreeItem(dir) {
aoqi@0:     var item = new LazyTreeItem(dir.name) {
aoqi@0:         expanded: false,
aoqi@0:         isLeaf: function() false,
aoqi@0:         getChildren: function() {
aoqi@0:             if (! this.expanded) {
aoqi@0:                 // call super class (TreeItem) method
aoqi@0:                 Java.super(item).getChildren().setAll(buildChildren(dir));
aoqi@0:                 this.expanded = true;
aoqi@0:             }
aoqi@0:             // call super class (TreeItem) method
aoqi@0:             return Java.super(item).getChildren();
aoqi@0:         }
aoqi@0:     }
aoqi@0:     return item;
aoqi@0: }
aoqi@0: 
aoqi@0: // JavaFX start method
aoqi@0: function start(stage) {
aoqi@0:     stage.title = dir.absolutePath;
aoqi@0:     var rootItem = makeLazyTreeItem(dir);
aoqi@0:     rootItem.expanded = true;
aoqi@0:     var tree = new TreeView(rootItem);
aoqi@0:     stage.scene = new Scene(tree, 300, 450);
aoqi@0:     stage.show();
aoqi@0: }