jdk8-mips64-public/nashorn: samples/astviewer.js@b1a7da25b547 (annotated)

samples/astviewer.js@b1a7da25b547 (annotated)

samples/astviewer.js

Wed, 27 Apr 2016 01:36:41 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:36:41 +0800
changeset 0: b1a7da25b547
child 962: ac62e33a99b0
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/nashorn/
changeset: 1034:4b9cc65dd24d
tag: jdk8u25-b17

 #// Usage: jjs -scripting -fx astviewer.js -- <scriptfile>
 /*
  * Copyright (c) 2014, 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.
  */
 if (!$OPTIONS._fx) {
     print("Usage: jjs -scripting -fx astviewer.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
 // 'load' function, JavaFX support by -fx, readFully function
 // in scripting mode.
 // 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");
 // Create a javafx TreeItem to view a AST node
 function treeItemForASTNode(ast, name) {
     var item = new TreeItem(name);
     for (var prop in ast) {
        var node = ast[prop];
        if (typeof node == 'object') {
            if (node == null) {
                // skip nulls
                continue;
            }
            if (Array.isArray(node) && node.length == 0) {
                // skip empty arrays
                continue;
            }
            var subitem = treeItemForASTNode(node, prop);
        } else {
            var subitem = new TreeItem(prop + ": " + node);
        }
        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];
 // load parser.js from nashorn resources
 load("nashorn:parser.js");
 // read the full content of the file and parse it
 // to get AST of the script specified
 var ast = parse(readFully(sourceName));
 // 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();
 }