1 #// Usage: jjs -scripting -fx astviewer.js -- <scriptfile> 2 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 */ 33 34 if (!$OPTIONS._fx) { 35 print("Usage: jjs -scripting -fx astviewer.js -- <.js file>"); 36 exit(1); 37 } 38 39 // Using JavaFX from Nashorn. See also: 40 // http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html 41 42 // This example shows AST of a script file as a JavaFX 43 // tree view in a window. If no file is specified, AST of 44 // this script file is shown. This script demonstrates 45 // 'load' function, JavaFX support by -fx, readFully function 46 // in scripting mode. 47 48 // JavaFX classes used 49 var StackPane = Java.type("javafx.scene.layout.StackPane"); 50 var Scene = Java.type("javafx.scene.Scene"); 51 var TreeItem = Java.type("javafx.scene.control.TreeItem"); 52 var TreeView = Java.type("javafx.scene.control.TreeView"); 53 54 // Create a javafx TreeItem to view a AST node 55 function treeItemForASTNode(ast, name) { 56 var item = new TreeItem(name); 57 for (var prop in ast) { 58 var node = ast[prop]; 59 if (typeof node == 'object') { 60 if (node == null) { 61 // skip nulls 62 continue; 63 } 64 65 if (Array.isArray(node) && node.length == 0) { 66 // skip empty arrays 67 continue; 68 } 69 70 var subitem = treeItemForASTNode(node, prop); 71 } else { 72 var subitem = new TreeItem(prop + ": " + node); 73 } 74 item.children.add(subitem); 75 } 76 return item; 77 } 78 79 // do we have a script file passed? if not, use current script 80 var sourceName = arguments.length == 0? __FILE__ : arguments[0]; 81 82 // load parser.js from nashorn resources 83 load("nashorn:parser.js"); 84 85 // read the full content of the file and parse it 86 // to get AST of the script specified 87 var ast = parse(readFully(sourceName)); 88 89 // JavaFX start method 90 function start(stage) { 91 stage.title = "AST Viewer"; 92 var rootItem = treeItemForASTNode(ast, sourceName); 93 var tree = new TreeView(rootItem); 94 var root = new StackPane(); 95 root.children.add(tree); 96 stage.scene = new Scene(root, 300, 450); 97 stage.show(); 98 }