| #// Usage: jjs -scripting -fx nashornastviewer.js -- <scriptfile> |
| |
| /* |
| * Copyright (c) 2015, 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. |
| */ |
| |
| # NOTE: This script requires JDK 9 build to run |
| |
| if (!$OPTIONS._fx) { |
| print("Usage: jjs -scripting -fx nashornastviewer.js -- <.js file>"); |
| exit(1); |
| } |
| |
| // Using JavaFX from Nashorn. See also: |
| // http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html |
| |
| // This example shows AST of a script file as a JavaFX |
| // tree view in a window. If no file is specified, AST of |
| // this script file is shown. This script demonstrates |
| // Nashorn Parser API too - http://openjdk.java.net/jeps/236 |
| |
| // JavaFX classes used |
| var StackPane = Java.type("javafx.scene.layout.StackPane"); |
| var Scene = Java.type("javafx.scene.Scene"); |
| var TreeItem = Java.type("javafx.scene.control.TreeItem"); |
| var TreeView = Java.type("javafx.scene.control.TreeView"); |
| |
| // Java classes used |
| var Enum = Java.type("java.lang.Enum"); |
| var File = Java.type("java.io.File"); |
| var List = Java.type("java.util.List"); |
| var Parser = Java.type("jdk.nashorn.api.tree.Parser"); |
| var Tree = Java.type("jdk.nashorn.api.tree.Tree"); |
| |
| // Create a javafx TreeItem to view a AST node |
| function treeItemForASTNode(ast, name) { |
| var item = new TreeItem(name); |
| // make an iteratable script object from a Tree |
| ast = Object.bindProperties({}, ast); |
| for (var prop in ast) { |
| var node = ast[prop]; |
| var type = typeof node; |
| |
| if (node == null || type == "function") { |
| // skip nulls and Java methods |
| continue; |
| } |
| |
| var subitem = null; |
| if (node instanceof Tree) { |
| subitem = treeItemForASTNode(node, prop); |
| } else if (node instanceof List) { |
| var len = node.size(); |
| subitem = new TreeItem(prop); |
| for (var i = 0; i < len; i++) { |
| var li = treeItemForASTNode(node.get(i), String(i)); |
| subitem.children.add(li); |
| } |
| } else if (node instanceof Enum || type != 'object') { |
| subitem = new TreeItem(prop + ": " + node); |
| } |
| |
| if (subitem) { |
| item.children.add(subitem); |
| } |
| } |
| return item; |
| } |
| |
| // do we have a script file passed? if not, use current script |
| var sourceName = arguments.length == 0? __FILE__ : arguments[0]; |
| |
| var parser = Parser.create("-scripting"); |
| // parse script to get CompilationUnitTree of it |
| var ast = parser.parse(new File(sourceName), null); |
| |
| // JavaFX start method |
| function start(stage) { |
| stage.title = "AST Viewer"; |
| var rootItem = treeItemForASTNode(ast, sourceName); |
| var tree = new TreeView(rootItem); |
| var root = new StackPane(); |
| root.children.add(tree); |
| stage.scene = new Scene(root, 300, 450); |
| stage.show(); |
| } |