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