Tue, 13 Jun 2017 16:30:24 -0700
Added tag jdk8u151-b01 for changeset 681ab42e7c73
1 #// Usage: jjs -fx filebrowser.js -- <start_dir>
3 /*
4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * - Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * - Neither the name of Oracle nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
34 // Uses -fx and javafx TreeView to visualize directories
35 if (!$OPTIONS._fx) {
36 print("Usage: jjs -fx filebrowser.js -- <start_dir>");
37 exit(1);
38 }
40 // Java classes used
41 var File = Java.type("java.io.File");
42 var Files = Java.type("java.nio.file.Files");
44 // check directory argument, if passed
45 var dir = arguments.length > 0? new File(arguments[0]) : new File(".");
46 if (! dir.isDirectory()) {
47 print(dir + " is not a directory!");
48 exit(2);
49 }
51 // JavaFX classes used
52 var FXCollections = Java.type("javafx.collections.FXCollections");
53 var Scene = Java.type("javafx.scene.Scene");
54 var TreeItem = Java.type("javafx.scene.control.TreeItem");
55 var TreeView = Java.type("javafx.scene.control.TreeView");
57 // create a subclass of JavaFX TreeItem class
58 var LazyTreeItem = Java.extend(TreeItem);
60 // lazily filling children of a directory LazyTreeItem
61 function buildChildren(dir) {
62 var children = FXCollections.observableArrayList();
63 var stream = Files.list(dir.toPath());
64 stream.forEach(function(path) {
65 var file = path.toFile();
66 var item = file.isDirectory()?
67 makeLazyTreeItem(file) : new TreeItem(file.name);
68 children.add(item);
69 });
70 stream.close();
71 return children;
72 }
74 // create an instance LazyTreeItem with override methods
75 function makeLazyTreeItem(dir) {
76 var item = new LazyTreeItem(dir.name) {
77 expanded: false,
78 isLeaf: function() false,
79 getChildren: function() {
80 if (! this.expanded) {
81 // call super class (TreeItem) method
82 Java.super(item).getChildren().setAll(buildChildren(dir));
83 this.expanded = true;
84 }
85 // call super class (TreeItem) method
86 return Java.super(item).getChildren();
87 }
88 }
89 return item;
90 }
92 // JavaFX start method
93 function start(stage) {
94 stage.title = dir.absolutePath;
95 var rootItem = makeLazyTreeItem(dir);
96 rootItem.expanded = true;
97 var tree = new TreeView(rootItem);
98 stage.scene = new Scene(tree, 300, 450);
99 stage.show();
100 }