From 89bda83e0570ab87c6e449f5955613d5385e90b3 Mon Sep 17 00:00:00 2001 From: "alexanders@b2ef00c0-3703-41da-baef-cfe82387ac0c" Date: Wed, 3 Feb 2010 00:50:41 +0000 Subject: removed obsolete svn folder from hg tree --HG-- extra : convert_revision : svn%3Ab2ef00c0-3703-41da-baef-cfe82387ac0c/trunk%408 --- infrastructure/rhino1_7R1/examples/Shell.java | 345 ++++++++++++++++++++++++++ 1 file changed, 345 insertions(+) create mode 100644 infrastructure/rhino1_7R1/examples/Shell.java (limited to 'infrastructure/rhino1_7R1/examples/Shell.java') diff --git a/infrastructure/rhino1_7R1/examples/Shell.java b/infrastructure/rhino1_7R1/examples/Shell.java new file mode 100644 index 0000000..6316c6f --- /dev/null +++ b/infrastructure/rhino1_7R1/examples/Shell.java @@ -0,0 +1,345 @@ +/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Rhino code, released + * May 6, 1998. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1997-1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License Version 2 or later (the "GPL"), in which + * case the provisions of the GPL are applicable instead of those above. If + * you wish to allow use of your version of this file only under the terms of + * the GPL and not to allow others to use your version of this file under the + * MPL, indicate your decision by deleting the provisions above and replacing + * them with the notice and other provisions required by the GPL. If you do + * not delete the provisions above, a recipient may use your version of this + * file under either the MPL or the GPL. + * + * ***** END LICENSE BLOCK ***** */ + +import org.mozilla.javascript.*; +import java.io.*; + +/** + * The shell program. + * + * Can execute scripts interactively or in batch mode at the command line. + * An example of controlling the JavaScript engine. + * + * @author Norris Boyd + */ +public class Shell extends ScriptableObject +{ + public String getClassName() + { + return "global"; + } + + /** + * Main entry point. + * + * Process arguments as would a normal Java program. Also + * create a new Context and associate it with the current thread. + * Then set up the execution environment and begin to + * execute scripts. + */ + public static void main(String args[]) { + // Associate a new Context with this thread + Context cx = Context.enter(); + try { + // Initialize the standard objects (Object, Function, etc.) + // This must be done before scripts can be executed. + Shell shell = new Shell(); + cx.initStandardObjects(shell); + + // Define some global functions particular to the shell. Note + // that these functions are not part of ECMA. + String[] names = { "print", "quit", "version", "load", "help" }; + shell.defineFunctionProperties(names, Shell.class, + ScriptableObject.DONTENUM); + + args = processOptions(cx, args); + + // Set up "arguments" in the global scope to contain the command + // line arguments after the name of the script to execute + Object[] array; + if (args.length == 0) { + array = new Object[0]; + } else { + int length = args.length - 1; + array = new Object[length]; + System.arraycopy(args, 1, array, 0, length); + } + Scriptable argsObj = cx.newArray(shell, array); + shell.defineProperty("arguments", argsObj, + ScriptableObject.DONTENUM); + + shell.processSource(cx, args.length == 0 ? null : args[0]); + } finally { + Context.exit(); + } + } + + /** + * Parse arguments. + */ + public static String[] processOptions(Context cx, String args[]) { + for (int i=0; i < args.length; i++) { + String arg = args[i]; + if (!arg.startsWith("-")) { + String[] result = new String[args.length - i]; + for (int j=i; j < args.length; j++) + result[j-i] = args[j]; + return result; + } + if (arg.equals("-version")) { + if (++i == args.length) + usage(arg); + double d = Context.toNumber(args[i]); + if (d != d) + usage(arg); + cx.setLanguageVersion((int) d); + continue; + } + usage(arg); + } + return new String[0]; + } + + /** + * Print a usage message. + */ + private static void usage(String s) { + p("Didn't understand \"" + s + "\"."); + p("Valid arguments are:"); + p("-version 100|110|120|130|140|150|160|170"); + System.exit(1); + } + + /** + * Print a help message. + * + * This method is defined as a JavaScript function. + */ + public void help() { + p(""); + p("Command Description"); + p("======= ==========="); + p("help() Display usage and help messages. "); + p("defineClass(className) Define an extension using the Java class"); + p(" named with the string argument. "); + p(" Uses ScriptableObject.defineClass(). "); + p("load(['foo.js', ...]) Load JavaScript source files named by "); + p(" string arguments. "); + p("loadClass(className) Load a class named by a string argument."); + p(" The class must be a script compiled to a"); + p(" class file. "); + p("print([expr ...]) Evaluate and print expressions. "); + p("quit() Quit the shell. "); + p("version([number]) Get or set the JavaScript version number."); + p(""); + } + + /** + * Print the string values of its arguments. + * + * This method is defined as a JavaScript function. + * Note that its arguments are of the "varargs" form, which + * allows it to handle an arbitrary number of arguments + * supplied to the JavaScript function. + * + */ + public static void print(Context cx, Scriptable thisObj, + Object[] args, Function funObj) + { + for (int i=0; i < args.length; i++) { + if (i > 0) + System.out.print(" "); + + // Convert the arbitrary JavaScript value into a string form. + String s = Context.toString(args[i]); + + System.out.print(s); + } + System.out.println(); + } + + /** + * Quit the shell. + * + * This only affects the interactive mode. + * + * This method is defined as a JavaScript function. + */ + public void quit() + { + quitting = true; + } + + /** + * Get and set the language version. + * + * This method is defined as a JavaScript function. + */ + public static double version(Context cx, Scriptable thisObj, + Object[] args, Function funObj) + { + double result = cx.getLanguageVersion(); + if (args.length > 0) { + double d = Context.toNumber(args[0]); + cx.setLanguageVersion((int) d); + } + return result; + } + + /** + * Load and execute a set of JavaScript source files. + * + * This method is defined as a JavaScript function. + * + */ + public static void load(Context cx, Scriptable thisObj, + Object[] args, Function funObj) + { + Shell shell = (Shell)getTopLevelScope(thisObj); + for (int i = 0; i < args.length; i++) { + shell.processSource(cx, Context.toString(args[i])); + } + } + + + /** + * Evaluate JavaScript source. + * + * @param cx the current context + * @param filename the name of the file to compile, or null + * for interactive mode. + */ + private void processSource(Context cx, String filename) + { + if (filename == null) { + BufferedReader in = new BufferedReader + (new InputStreamReader(System.in)); + String sourceName = ""; + int lineno = 1; + boolean hitEOF = false; + do { + int startline = lineno; + System.err.print("js> "); + System.err.flush(); + try { + String source = ""; + // Collect lines of source to compile. + while(true) { + String newline; + newline = in.readLine(); + if (newline == null) { + hitEOF = true; + break; + } + source = source + newline + "\n"; + lineno++; + // Continue collecting as long as more lines + // are needed to complete the current + // statement. stringIsCompilableUnit is also + // true if the source statement will result in + // any error other than one that might be + // resolved by appending more source. + if (cx.stringIsCompilableUnit(source)) + break; + } + Object result = cx.evaluateString(this, source, + sourceName, startline, + null); + if (result != Context.getUndefinedValue()) { + System.err.println(Context.toString(result)); + } + } + catch (WrappedException we) { + // Some form of exception was caught by JavaScript and + // propagated up. + System.err.println(we.getWrappedException().toString()); + we.printStackTrace(); + } + catch (EvaluatorException ee) { + // Some form of JavaScript error. + System.err.println("js: " + ee.getMessage()); + } + catch (JavaScriptException jse) { + // Some form of JavaScript error. + System.err.println("js: " + jse.getMessage()); + } + catch (IOException ioe) { + System.err.println(ioe.toString()); + } + if (quitting) { + // The user executed the quit() function. + break; + } + } while (!hitEOF); + System.err.println(); + } else { + FileReader in = null; + try { + in = new FileReader(filename); + } + catch (FileNotFoundException ex) { + Context.reportError("Couldn't open file \"" + filename + "\"."); + return; + } + + try { + // Here we evalute the entire contents of the file as + // a script. Text is printed only if the print() function + // is called. + cx.evaluateReader(this, in, filename, 1, null); + } + catch (WrappedException we) { + System.err.println(we.getWrappedException().toString()); + we.printStackTrace(); + } + catch (EvaluatorException ee) { + System.err.println("js: " + ee.getMessage()); + } + catch (JavaScriptException jse) { + System.err.println("js: " + jse.getMessage()); + } + catch (IOException ioe) { + System.err.println(ioe.toString()); + } + finally { + try { + in.close(); + } + catch (IOException ioe) { + System.err.println(ioe.toString()); + } + } + } + } + + private static void p(String s) { + System.out.println(s); + } + + private boolean quitting; +} + -- cgit v1.2.3