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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using System.Collections.Generic;
using Microsoft.ClearScript.Util;
namespace Microsoft.ClearScript.Windows
{
///
/// Represents an instance of the JScript engine.
///
public class JScriptEngine : WindowsScriptEngine
{
#region data
private static readonly Dictionary runtimeErrorMap = new Dictionary
{
// https://msdn.microsoft.com/en-us/library/1dk3k160(v=vs.84).aspx
{ 5029, "Array length must be a finite positive integer" },
{ 5030, "Array length must be assigned a finite positive number" },
{ 5028, "Array or arguments object expected" },
{ 5010, "Boolean expected" },
{ 5003, "Cannot assign to a function result" },
{ 5000, "Cannot assign to 'this'" },
{ 5034, "Circular reference in value argument not supported" },
{ 5006, "Date object expected" },
{ 5015, "Enumerator object expected" },
{ 5022, "Exception thrown and not caught" },
{ 5020, "Expected ')' in regular expression" },
{ 5019, "Expected ']' in regular expression" },
{ 5023, "Function does not have a valid prototype object" },
{ 5002, "Function expected" },
{ 5008, "Illegal assignment" },
{ 5021, "Invalid range in character set" },
{ 5035, "Invalid replacer argument" },
{ 5014, "JScript object expected" },
{ 5001, "Number expected" },
{ 5007, "Object expected" },
{ 5012, "Object member expected" },
{ 5016, "Regular Expression object expected" },
{ 5005, "String expected" },
{ 5017, "Syntax error in regular expression" },
{ 5026, "The number of fractional digits is out of range" },
{ 5027, "The precision is out of range" },
{ 5025, "The URI to be decoded is not a valid encoding" },
{ 5024, "The URI to be encoded contains an invalid character" },
{ 5009, "Undefined identifier" },
{ 5018, "Unexpected quantifier" },
{ 5013, "VBArray expected" }
};
private static readonly Dictionary syntaxErrorMap = new Dictionary
{
// https://msdn.microsoft.com/en-us/library/6bby3x2e(v=vs.84).aspx
{ 1019, "Can't have 'break' outside of loop" },
{ 1020, "Can't have 'continue' outside of loop" },
{ 1030, "Conditional compilation is turned off" },
{ 1027, "'default' can only appear once in a 'switch' statement" },
{ 1005, "Expected '('" },
{ 1006, "Expected ')'" },
{ 1012, "Expected '/'" },
{ 1003, "Expected ':'" },
{ 1004, "Expected ';'" },
{ 1032, "Expected '@'" },
{ 1029, "Expected '@end'" },
{ 1007, "Expected ']'" },
{ 1008, "Expected '{'" },
{ 1009, "Expected '}'" },
{ 1011, "Expected '='" },
{ 1033, "Expected 'catch'" },
{ 1031, "Expected constant" },
{ 1023, "Expected hexadecimal digit" },
{ 1010, "Expected identifier" },
{ 1028, "Expected identifier, string or number" },
{ 1024, "Expected 'while'" },
{ 1014, "Invalid character" },
{ 1026, "Label not found" },
{ 1025, "Label redefined" },
{ 1018, "'return' statement outside of function" },
{ 1002, "Syntax error" },
{ 1035, "Throw must be followed by an expression on the same source line" },
{ 1016, "Unterminated comment" },
{ 1015, "Unterminated string constant" }
};
#endregion
#region constructors
///
/// Initializes a new JScript engine instance.
///
public JScriptEngine()
: this(null)
{
}
///
/// Initializes a new JScript engine instance with the specified name.
///
/// A name to associate with the instance. Currently this name is used only as a label in presentation contexts such as debugger user interfaces.
public JScriptEngine(string name)
: this(name, WindowsScriptEngineFlags.None)
{
}
///
/// Initializes a new JScript engine instance with the specified options.
///
/// A value that selects options for the operation.
public JScriptEngine(WindowsScriptEngineFlags flags)
: this(null, flags)
{
}
///
/// Initializes a new JScript engine instance with the specified name and options.
///
/// A name to associate with the instance. Currently this name is used only as a label in presentation contexts such as debugger user interfaces.
/// A value that selects options for the operation.
public JScriptEngine(string name, WindowsScriptEngineFlags flags)
: this("JScript", name, flags)
{
}
///
/// Initializes a new JScript engine instance with the specified programmatic
/// identifier, name, and options.
///
/// The programmatic identifier (ProgID) of the JScript engine class.
/// A name to associate with the instance. Currently this name is used only as a label in presentation contexts such as debugger user interfaces.
/// A value that selects options for the operation.
///
/// The argument can be a class identifier (CLSID) in standard
/// GUID format with braces (e.g., "{F414C260-6AC0-11CF-B6D1-00AA00BBBB58}").
///
protected JScriptEngine(string progID, string name, WindowsScriptEngineFlags flags)
: base(progID, name, flags)
{
Execute(
MiscHelpers.FormatInvariant("{0} [internal]", GetType().Name),
@"
EngineInternal = (function () {
function convertArgs(args) {
var result = [];
if (args.GetValue) {
var count = args.Length;
for (var i = 0; i < count; i++) {
result.push(args[i]);
}
}
else {
args = new VBArray(args);
var count = args.ubound(1) + 1;
for (var i = 0; i < count; i++) {
result.push(args.getItem(i));
}
}
return result;
}
function construct(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15) {
return new this(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15);
}
return {
getCommandResult: function (value) {
if (value != null) {
if ((typeof(value) == 'object') || (typeof(value) == 'function')) {
if (typeof(value.toString) == 'function') {
return value.toString();
}
}
}
return value;
},
invokeConstructor: function (constructor, args) {
if (typeof(constructor) != 'function') {
throw new Error('Function expected');
}
return construct.apply(constructor, convertArgs(args));
},
invokeMethod: function (target, method, args) {
if (typeof(method) != 'function') {
throw new Error('Function expected');
}
return method.apply(target, convertArgs(args));
}
};
})();
"
);
}
#endregion
#region ScriptEngine overrides
///
/// Gets the script engine's recommended file name extension for script files.
///
///
/// instances return "js" for this property.
///
public override string FileNameExtension
{
get { return "js"; }
}
///
/// Executes script code as a command.
///
/// The script command to execute.
/// The command output.
///
///
/// This method is similar to but optimized for
/// command consoles. The specified command must be limited to a single expression or
/// statement. Script engines can override this method to customize command execution as
/// well as the process of converting the result to a string for console output.
///
///
/// The version of this method attempts to use
/// toString
/// to convert the return value.
///
///
public override string ExecuteCommand(string command)
{
Script.EngineInternal.command = command;
return base.ExecuteCommand("EngineInternal.getCommandResult(eval(EngineInternal.command))");
}
internal override IDictionary RuntimeErrorMap
{
get { return runtimeErrorMap; }
}
internal override IDictionary SyntaxErrorMap
{
get { return syntaxErrorMap; }
}
#endregion
}
}