Mon, 02 Jul 2018 16:43:07 +0100
Merge
1 #// Usage: jjs -scripting -fx astviewer.js -- <scriptfile>
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 if (!$OPTIONS._fx) {
35 print("Usage: jjs -scripting -fx astviewer.js -- <.js file>");
36 exit(1);
37 }
39 // Using JavaFX from Nashorn. See also:
40 // http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
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.
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");
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 }
65 if (Array.isArray(node) && node.length == 0) {
66 // skip empty arrays
67 continue;
68 }
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 }
79 // do we have a script file passed? if not, use current script
80 var sourceName = arguments.length == 0? __FILE__ : arguments[0];
82 // load parser.js from nashorn resources
83 load("nashorn:parser.js");
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));
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 }