1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/astviewer.js Wed Apr 27 01:36:41 2016 +0800
1.3 @@ -0,0 +1,98 @@
1.4 +#// Usage: jjs -scripting -fx astviewer.js -- <scriptfile>
1.5 +
1.6 +/*
1.7 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions
1.11 + * are met:
1.12 + *
1.13 + * - Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + *
1.16 + * - Redistributions in binary form must reproduce the above copyright
1.17 + * notice, this list of conditions and the following disclaimer in the
1.18 + * documentation and/or other materials provided with the distribution.
1.19 + *
1.20 + * - Neither the name of Oracle nor the names of its
1.21 + * contributors may be used to endorse or promote products derived
1.22 + * from this software without specific prior written permission.
1.23 + *
1.24 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.25 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.26 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.27 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.28 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.29 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.30 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.31 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.32 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.33 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.34 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.35 + */
1.36 +
1.37 +if (!$OPTIONS._fx) {
1.38 + print("Usage: jjs -scripting -fx astviewer.js -- <.js file>");
1.39 + exit(1);
1.40 +}
1.41 +
1.42 +// Using JavaFX from Nashorn. See also:
1.43 +// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
1.44 +
1.45 +// This example shows AST of a script file as a JavaFX
1.46 +// tree view in a window. If no file is specified, AST of
1.47 +// this script file is shown. This script demonstrates
1.48 +// 'load' function, JavaFX support by -fx, readFully function
1.49 +// in scripting mode.
1.50 +
1.51 +// JavaFX classes used
1.52 +var StackPane = Java.type("javafx.scene.layout.StackPane");
1.53 +var Scene = Java.type("javafx.scene.Scene");
1.54 +var TreeItem = Java.type("javafx.scene.control.TreeItem");
1.55 +var TreeView = Java.type("javafx.scene.control.TreeView");
1.56 +
1.57 +// Create a javafx TreeItem to view a AST node
1.58 +function treeItemForASTNode(ast, name) {
1.59 + var item = new TreeItem(name);
1.60 + for (var prop in ast) {
1.61 + var node = ast[prop];
1.62 + if (typeof node == 'object') {
1.63 + if (node == null) {
1.64 + // skip nulls
1.65 + continue;
1.66 + }
1.67 +
1.68 + if (Array.isArray(node) && node.length == 0) {
1.69 + // skip empty arrays
1.70 + continue;
1.71 + }
1.72 +
1.73 + var subitem = treeItemForASTNode(node, prop);
1.74 + } else {
1.75 + var subitem = new TreeItem(prop + ": " + node);
1.76 + }
1.77 + item.children.add(subitem);
1.78 + }
1.79 + return item;
1.80 +}
1.81 +
1.82 +// do we have a script file passed? if not, use current script
1.83 +var sourceName = arguments.length == 0? __FILE__ : arguments[0];
1.84 +
1.85 +// load parser.js from nashorn resources
1.86 +load("nashorn:parser.js");
1.87 +
1.88 +// read the full content of the file and parse it
1.89 +// to get AST of the script specified
1.90 +var ast = parse(readFully(sourceName));
1.91 +
1.92 +// JavaFX start method
1.93 +function start(stage) {
1.94 + stage.title = "AST Viewer";
1.95 + var rootItem = treeItemForASTNode(ast, sourceName);
1.96 + var tree = new TreeView(rootItem);
1.97 + var root = new StackPane();
1.98 + root.children.add(tree);
1.99 + stage.scene = new Scene(root, 300, 450);
1.100 + stage.show();
1.101 +}
