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