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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically
embedded into Java applications to provide scripting to end users.
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.ResourceBundle;
import org.mozilla.javascript.ast.FunctionNode;
import org.mozilla.javascript.v8dtoa.DoubleConversion;
import org.mozilla.javascript.v8dtoa.FastDtoa;
import org.mozilla.javascript.xml.XMLLib;
import org.mozilla.javascript.xml.XMLObject;
/**
* This is the class that implements the runtime.
*
* @author Norris Boyd
*/
public class ScriptRuntime {
/**
* No instances should be created.
*/
protected ScriptRuntime() {
}
/**
* Returns representation of the [[ThrowTypeError]] object.
* See ECMA 5 spec, 13.2.3
*
* @deprecated {@link #typeErrorThrower(Context)}
*/
@Deprecated
public static BaseFunction typeErrorThrower() {
return typeErrorThrower(Context.getCurrentContext());
}
/**
* Returns representation of the [[ThrowTypeError]] object.
* See ECMA 5 spec, 13.2.3
*/
public static BaseFunction typeErrorThrower(Context cx) {
if (cx.typeErrorThrower == null) {
BaseFunction thrower = new BaseFunction() {
private static final long serialVersionUID = -5891740962154902286L;
@Override
public Object call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
throw typeError0("msg.op.not.allowed");
}
@Override
public int getLength() {
return 0;
}
};
ScriptRuntime.setFunctionProtoAndParent(thrower, cx.topCallScope);
thrower.preventExtensions();
cx.typeErrorThrower = thrower;
}
return cx.typeErrorThrower;
}
static class NoSuchMethodShim implements Callable {
String methodName;
Callable noSuchMethodMethod;
NoSuchMethodShim(Callable noSuchMethodMethod, String methodName)
{
this.noSuchMethodMethod = noSuchMethodMethod;
this.methodName = methodName;
}
/**
* Perform the call.
*
* @param cx the current Context for this thread
* @param scope the scope to use to resolve properties.
* @param thisObj the JavaScript this object
* @param args the array of arguments
* @return the result of the call
*/
@Override
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args)
{
Object[] nestedArgs = new Object[2];
nestedArgs[0] = methodName;
nestedArgs[1] = newArrayLiteral(args, null, cx, scope);
return noSuchMethodMethod.call(cx, scope, thisObj, nestedArgs);
}
}
/*
* There's such a huge space (and some time) waste for the Foo.class
* syntax: the compiler sticks in a test of a static field in the
* enclosing class for null and the code for creating the class value.
* It has to do this since the reference has to get pushed off until
* execution time (i.e. can't force an early load), but for the
* 'standard' classes - especially those in java.lang, we can trust
* that they won't cause problems by being loaded early.
*/
public final static Class
BooleanClass = Kit.classOrNull("java.lang.Boolean"),
ByteClass = Kit.classOrNull("java.lang.Byte"),
CharacterClass = Kit.classOrNull("java.lang.Character"),
ClassClass = Kit.classOrNull("java.lang.Class"),
DoubleClass = Kit.classOrNull("java.lang.Double"),
FloatClass = Kit.classOrNull("java.lang.Float"),
IntegerClass = Kit.classOrNull("java.lang.Integer"),
LongClass = Kit.classOrNull("java.lang.Long"),
NumberClass = Kit.classOrNull("java.lang.Number"),
ObjectClass = Kit.classOrNull("java.lang.Object"),
ShortClass = Kit.classOrNull("java.lang.Short"),
StringClass = Kit.classOrNull("java.lang.String"),
DateClass = Kit.classOrNull("java.util.Date");
public final static Class
ContextClass
= Kit.classOrNull("org.mozilla.javascript.Context"),
ContextFactoryClass
= Kit.classOrNull("org.mozilla.javascript.ContextFactory"),
FunctionClass
= Kit.classOrNull("org.mozilla.javascript.Function"),
ScriptableObjectClass
= Kit.classOrNull("org.mozilla.javascript.ScriptableObject");
public static final Class ScriptableClass =
Scriptable.class;
private static final Object LIBRARY_SCOPE_KEY = "LIBRARY_SCOPE";
public static boolean isRhinoRuntimeType(Class cl)
{
if (cl.isPrimitive()) {
return (cl != Character.TYPE);
}
return (cl == StringClass || cl == BooleanClass
|| NumberClass.isAssignableFrom(cl)
|| ScriptableClass.isAssignableFrom(cl));
}
public static ScriptableObject initSafeStandardObjects(Context cx,
ScriptableObject scope,
boolean sealed)
{
if (scope == null) {
scope = new NativeObject();
}
scope.associateValue(LIBRARY_SCOPE_KEY, scope);
(new ClassCache()).associate(scope);
BaseFunction.init(scope, sealed);
NativeObject.init(scope, sealed);
Scriptable objectProto = ScriptableObject.getObjectPrototype(scope);
// Function.prototype.__proto__ should be Object.prototype
Scriptable functionProto = ScriptableObject.getClassPrototype(scope, "Function");
functionProto.setPrototype(objectProto);
// Set the prototype of the object passed in if need be
if (scope.getPrototype() == null)
scope.setPrototype(objectProto);
// must precede NativeGlobal since it's needed therein
NativeError.init(scope, sealed);
NativeGlobal.init(cx, scope, sealed);
NativeArray.init(scope, sealed);
if (cx.getOptimizationLevel() > 0) {
// When optimizing, attempt to fulfill all requests for new Array(N)
// with a higher threshold before switching to a sparse
// representation
NativeArray.setMaximumInitialCapacity(200000);
}
NativeString.init(scope, sealed);
NativeBoolean.init(scope, sealed);
NativeNumber.init(scope, sealed);
NativeDate.init(scope, sealed);
NativeMath.init(scope, sealed);
NativeJSON.init(scope, sealed);
NativeWith.init(scope, sealed);
NativeCall.init(scope, sealed);
NativeScript.init(scope, sealed);
NativeIterator.init(scope, sealed); // Also initializes NativeGenerator
NativeArrayIterator.init(scope, sealed);
NativeStringIterator.init(scope, sealed);
boolean withXml = cx.hasFeature(Context.FEATURE_E4X) &&
cx.getE4xImplementationFactory() != null;
// define lazy-loaded properties using their class name
new LazilyLoadedCtor(scope, "RegExp",
"org.mozilla.javascript.regexp.NativeRegExp", sealed, true);
new LazilyLoadedCtor(scope, "Continuation",
"org.mozilla.javascript.NativeContinuation", sealed, true);
if (withXml) {
String xmlImpl = cx.getE4xImplementationFactory().getImplementationClassName();
new LazilyLoadedCtor(scope, "XML", xmlImpl, sealed, true);
new LazilyLoadedCtor(scope, "XMLList", xmlImpl, sealed, true);
new LazilyLoadedCtor(scope, "Namespace", xmlImpl, sealed, true);
new LazilyLoadedCtor(scope, "QName", xmlImpl, sealed, true);
}
if (((cx.getLanguageVersion() >= Context.VERSION_1_8) &&
cx.hasFeature(Context.FEATURE_V8_EXTENSIONS)) ||
(cx.getLanguageVersion() >= Context.VERSION_ES6))
{
new LazilyLoadedCtor(scope, "ArrayBuffer",
"org.mozilla.javascript.typedarrays.NativeArrayBuffer",
sealed, true);
new LazilyLoadedCtor(scope, "Int8Array",
"org.mozilla.javascript.typedarrays.NativeInt8Array",
sealed, true);
new LazilyLoadedCtor(scope, "Uint8Array",
"org.mozilla.javascript.typedarrays.NativeUint8Array",
sealed, true);
new LazilyLoadedCtor(scope, "Uint8ClampedArray",
"org.mozilla.javascript.typedarrays.NativeUint8ClampedArray",
sealed, true);
new LazilyLoadedCtor(scope, "Int16Array",
"org.mozilla.javascript.typedarrays.NativeInt16Array",
sealed, true);
new LazilyLoadedCtor(scope, "Uint16Array",
"org.mozilla.javascript.typedarrays.NativeUint16Array",
sealed, true);
new LazilyLoadedCtor(scope, "Int32Array",
"org.mozilla.javascript.typedarrays.NativeInt32Array",
sealed, true);
new LazilyLoadedCtor(scope, "Uint32Array",
"org.mozilla.javascript.typedarrays.NativeUint32Array",
sealed, true);
new LazilyLoadedCtor(scope, "Float32Array",
"org.mozilla.javascript.typedarrays.NativeFloat32Array",
sealed, true);
new LazilyLoadedCtor(scope, "Float64Array",
"org.mozilla.javascript.typedarrays.NativeFloat64Array",
sealed, true);
new LazilyLoadedCtor(scope, "DataView",
"org.mozilla.javascript.typedarrays.NativeDataView",
sealed, true);
}
if (cx.getLanguageVersion() >= Context.VERSION_ES6) {
NativeSymbol.init(cx, scope, sealed);
NativeCollectionIterator.init(scope, NativeSet.ITERATOR_TAG, sealed);
NativeCollectionIterator.init(scope, NativeMap.ITERATOR_TAG, sealed);
NativeMap.init(cx, scope, sealed);
NativeSet.init(cx, scope, sealed);
NativeWeakMap.init(scope, sealed);
NativeWeakSet.init(scope, sealed);
}
if (scope instanceof TopLevel) {
((TopLevel)scope).cacheBuiltins();
}
return scope;
}
public static ScriptableObject initStandardObjects(Context cx,
ScriptableObject scope,
boolean sealed)
{
ScriptableObject s = initSafeStandardObjects(cx, scope, sealed);
new LazilyLoadedCtor(s, "Packages",
"org.mozilla.javascript.NativeJavaTopPackage", sealed, true);
new LazilyLoadedCtor(s, "getClass",
"org.mozilla.javascript.NativeJavaTopPackage", sealed, true);
new LazilyLoadedCtor(s, "JavaAdapter",
"org.mozilla.javascript.JavaAdapter", sealed, true);
new LazilyLoadedCtor(s, "JavaImporter",
"org.mozilla.javascript.ImporterTopLevel", sealed, true);
for (String packageName : getTopPackageNames()) {
new LazilyLoadedCtor(s, packageName,
"org.mozilla.javascript.NativeJavaTopPackage", sealed, true);
}
return s;
}
static String[] getTopPackageNames() {
// Include "android" top package if running on Android
return "Dalvik".equals(System.getProperty("java.vm.name")) ?
new String[] { "java", "javax", "org", "com", "edu", "net", "android" } :
new String[] { "java", "javax", "org", "com", "edu", "net" };
}
public static ScriptableObject getLibraryScopeOrNull(Scriptable scope)
{
ScriptableObject libScope;
libScope = (ScriptableObject)ScriptableObject.
getTopScopeValue(scope, LIBRARY_SCOPE_KEY);
return libScope;
}
// It is public so NativeRegExp can access it.
public static boolean isJSLineTerminator(int c)
{
// Optimization for faster check for eol character:
// they do not have 0xDFD0 bits set
if ((c & 0xDFD0) != 0) {
return false;
}
return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
}
public static boolean isJSWhitespaceOrLineTerminator(int c) {
return (isStrWhiteSpaceChar(c) || isJSLineTerminator(c));
}
/**
* Indicates if the character is a Str whitespace char according to ECMA spec:
* StrWhiteSpaceChar :::
*/
static boolean isStrWhiteSpaceChar(int c)
{
switch (c) {
case ' ': //
case '\n': //
case '\r': //
case '\t': //
case '\u00A0': //
case '\u000C': //
case '\u000B': //
case '\u2028': //
case '\u2029': //
case '\uFEFF': //
return true;
default:
return Character.getType(c) == Character.SPACE_SEPARATOR;
}
}
public static Boolean wrapBoolean(boolean b)
{
return b ? Boolean.TRUE : Boolean.FALSE;
}
public static Integer wrapInt(int i)
{
return Integer.valueOf(i);
}
public static Number wrapNumber(double x)
{
if (Double.isNaN(x)) {
return ScriptRuntime.NaNobj;
}
return new Double(x);
}
/**
* Convert the value to a boolean.
*
* See ECMA 9.2.
*/
public static boolean toBoolean(Object val)
{
for (;;) {
if (val instanceof Boolean)
return ((Boolean) val).booleanValue();
if (val == null || val == Undefined.instance)
return false;
if (val instanceof CharSequence)
return ((CharSequence) val).length() != 0;
if (val instanceof Number) {
double d = ((Number) val).doubleValue();
return (!Double.isNaN(d) && d != 0.0);
}
if (val instanceof Scriptable) {
if (val instanceof ScriptableObject &&
((ScriptableObject) val).avoidObjectDetection())
{
return false;
}
if (Context.getContext().isVersionECMA1()) {
// pure ECMA
return true;
}
// ECMA extension
val = ((Scriptable) val).getDefaultValue(BooleanClass);
if ((val instanceof Scriptable) && !isSymbol(val))
throw errorWithClassName("msg.primitive.expected", val);
continue;
}
warnAboutNonJSObject(val);
return true;
}
}
/**
* Convert the value to a number.
*
* See ECMA 9.3.
*/
public static double toNumber(Object val)
{
for (;;) {
if (val instanceof Number)
return ((Number) val).doubleValue();
if (val == null)
return +0.0;
if (val == Undefined.instance)
return NaN;
if (val instanceof String)
return toNumber((String) val);
if (val instanceof CharSequence)
return toNumber(val.toString());
if (val instanceof Boolean)
return ((Boolean) val).booleanValue() ? 1 : +0.0;
if (val instanceof Symbol)
throw typeError0("msg.not.a.number");
if (val instanceof Scriptable) {
val = ((Scriptable) val).getDefaultValue(NumberClass);
if ((val instanceof Scriptable) && !isSymbol(val))
throw errorWithClassName("msg.primitive.expected", val);
continue;
}
warnAboutNonJSObject(val);
return NaN;
}
}
public static double toNumber(Object[] args, int index) {
return (index < args.length) ? toNumber(args[index]) : NaN;
}
public static final double NaN = Double.NaN;
// Preserve backward-compatibility with historical value of this.
public static final double negativeZero = Double.longBitsToDouble(0x8000000000000000L);
public static final Double NaNobj = new Double(NaN);
static double stringPrefixToNumber(String s, int start, int radix) {
return stringToNumber(s, start, s.length() - 1, radix, true);
}
static double stringToNumber(String s, int start, int end, int radix) {
return stringToNumber(s, start, end, radix, false);
}
/*
* Helper function for toNumber, parseInt, and TokenStream.getToken.
*/
private static double stringToNumber(String source, int sourceStart, int sourceEnd, int radix, boolean isPrefix) {
char digitMax = '9';
char lowerCaseBound = 'a';
char upperCaseBound = 'A';
if (radix < 10) {
digitMax = (char) ('0' + radix - 1);
}
if (radix > 10) {
lowerCaseBound = (char) ('a' + radix - 10);
upperCaseBound = (char) ('A' + radix - 10);
}
int end;
double sum = 0.0;
for (end = sourceStart; end <= sourceEnd; end++) {
char c = source.charAt(end);
int newDigit;
if ('0' <= c && c <= digitMax)
newDigit = c - '0';
else if ('a' <= c && c < lowerCaseBound)
newDigit = c - 'a' + 10;
else if ('A' <= c && c < upperCaseBound)
newDigit = c - 'A' + 10;
else if (!isPrefix)
return NaN; // isn't a prefix but found unexpected char
else
break; // unexpected char
sum = sum*radix + newDigit;
}
if (sourceStart == end) { // stopped right at the beginning
return NaN;
}
if (sum > NativeNumber.MAX_SAFE_INTEGER) {
if (radix == 10) {
/* If we're accumulating a decimal number and the number
* is >= 2^53, then the result from the repeated multiply-add
* above may be inaccurate. Call Java to get the correct
* answer.
*/
try {
return Double.parseDouble(source.substring(sourceStart, end));
} catch (NumberFormatException nfe) {
return NaN;
}
} else if (radix == 2 || radix == 4 || radix == 8 ||
radix == 16 || radix == 32)
{
/* The number may also be inaccurate for one of these bases.
* This happens if the addition in value*radix + digit causes
* a round-down to an even least significant mantissa bit
* when the first dropped bit is a one. If any of the
* following digits in the number (which haven't been added
* in yet) are nonzero then the correct action would have
* been to round up instead of down. An example of this
* occurs when reading the number 0x1000000000000081, which
* rounds to 0x1000000000000000 instead of 0x1000000000000100.
*/
int bitShiftInChar = 1;
int digit = 0;
final int SKIP_LEADING_ZEROS = 0;
final int FIRST_EXACT_53_BITS = 1;
final int AFTER_BIT_53 = 2;
final int ZEROS_AFTER_54 = 3;
final int MIXED_AFTER_54 = 4;
int state = SKIP_LEADING_ZEROS;
int exactBitsLimit = 53;
double factor = 0.0;
boolean bit53 = false;
// bit54 is the 54th bit (the first dropped from the mantissa)
boolean bit54 = false;
int pos = sourceStart;
for (;;) {
if (bitShiftInChar == 1) {
if (pos == end)
break;
digit = source.charAt(pos++);
if ('0' <= digit && digit <= '9')
digit -= '0';
else if ('a' <= digit && digit <= 'z')
digit -= 'a' - 10;
else
digit -= 'A' - 10;
bitShiftInChar = radix;
}
bitShiftInChar >>= 1;
boolean bit = (digit & bitShiftInChar) != 0;
switch (state) {
case SKIP_LEADING_ZEROS:
if (bit) {
--exactBitsLimit;
sum = 1.0;
state = FIRST_EXACT_53_BITS;
}
break;
case FIRST_EXACT_53_BITS:
sum *= 2.0;
if (bit)
sum += 1.0;
--exactBitsLimit;
if (exactBitsLimit == 0) {
bit53 = bit;
state = AFTER_BIT_53;
}
break;
case AFTER_BIT_53:
bit54 = bit;
factor = 2.0;
state = ZEROS_AFTER_54;
break;
case ZEROS_AFTER_54:
if (bit) {
state = MIXED_AFTER_54;
}
// fallthrough
case MIXED_AFTER_54:
factor *= 2;
break;
}
}
switch (state) {
case SKIP_LEADING_ZEROS:
sum = 0.0;
break;
case FIRST_EXACT_53_BITS:
case AFTER_BIT_53:
// do nothing
break;
case ZEROS_AFTER_54:
// x1.1 -> x1 + 1 (round up)
// x0.1 -> x0 (round down)
if (bit54 & bit53)
sum += 1.0;
sum *= factor;
break;
case MIXED_AFTER_54:
// x.100...1.. -> x + 1 (round up)
// x.0anything -> x (round down)
if (bit54)
sum += 1.0;
sum *= factor;
break;
}
}
/* We don't worry about inaccurate numbers for any other base. */
}
return sum;
}
/**
* ToNumber applied to the String type
*
* See the #sec-tonumber-applied-to-the-string-type section of ECMA
*/
public static double toNumber(String s) {
final int len = s.length();
// Skip whitespace at the start
int start = 0;
char startChar;
for (;;) {
if (start == len) {
// empty or contains only whitespace
return +0.0;
}
startChar = s.charAt(start);
if (!ScriptRuntime.isStrWhiteSpaceChar(startChar)) {
// found first non-whitespace character
break;
}
start++;
}
// Skip whitespace at the end
int end = len - 1;
char endChar;
while (ScriptRuntime.isStrWhiteSpaceChar(endChar = s.charAt(end))) {
end--;
}
// Do not break scripts relying on old non-compliant conversion
// (see bug #368)
// 1. makes ToNumber parse only a valid prefix in hex literals (similar to 'parseInt()')
// ToNumber('0x10 something') => 16
// 2. allows plus and minus signs for hexadecimal numbers
// ToNumber('-0x10') => -16
// 3. disables support for binary ('0b10') and octal ('0o13') literals
// ToNumber('0b1') => NaN
// ToNumber('0o5') => NaN
final Context cx = Context.getCurrentContext();
final boolean oldParsingMode =
cx == null || cx.getLanguageVersion() < Context.VERSION_ES6;
// Handle non-base10 numbers
if (startChar == '0') {
if (start + 2 <= end) {
final char radixC = s.charAt(start + 1);
int radix = -1;
if (radixC == 'x' || radixC == 'X') {
radix = 16;
} else if (!oldParsingMode && (radixC == 'o' || radixC == 'O')) {
radix = 8;
} else if (!oldParsingMode && (radixC == 'b' || radixC == 'B')) {
radix = 2;
}
if (radix != -1) {
if (oldParsingMode) {
return stringPrefixToNumber(s, start + 2, radix);
}
return stringToNumber(s, start + 2, end, radix);
}
}
} else if (oldParsingMode && (startChar == '+' || startChar == '-')) {
// If in old parsing mode, check for a signed hexadecimal number
if (start + 3 <= end && s.charAt(start + 1) == '0') {
final char radixC = s.charAt(start + 2);
if (radixC == 'x' || radixC == 'X') {
double val = stringPrefixToNumber(s, start + 3, 16);
return startChar == '-' ? -val : val;
}
}
}
if (endChar == 'y') {
// check for "Infinity"
if (startChar == '+' || startChar == '-') {
start++;
}
if (start + 7 == end && s.regionMatches(start, "Infinity", 0, 8)) {
return startChar == '-'
? Double.NEGATIVE_INFINITY
: Double.POSITIVE_INFINITY;
}
return NaN;
}
// A base10, non-infinity number:
// just try a normal floating point conversion
String sub = s.substring(start, end+1);
// Quick test to check string contains only valid characters because
// Double.parseDouble() can be slow and accept input we want to reject
for (int i = sub.length() - 1; i >= 0; i--) {
char c = sub.charAt(i);
if (('0' <= c && c <= '9') || c == '.' ||
c == 'e' || c == 'E' ||
c == '+' || c == '-')
continue;
return NaN;
}
try {
return Double.parseDouble(sub);
} catch (NumberFormatException ex) {
return NaN;
}
}
/**
* Helper function for builtin objects that use the varargs form.
* ECMA function formal arguments are undefined if not supplied;
* this function pads the argument array out to the expected
* length, if necessary.
*/
public static Object[] padArguments(Object[] args, int count) {
if (count < args.length)
return args;
int i;
Object[] result = new Object[count];
for (i = 0; i < args.length; i++) {
result[i] = args[i];
}
for (; i < count; i++) {
result[i] = Undefined.instance;
}
return result;
}
public static String escapeString(String s)
{
return escapeString(s, '"');
}
/**
* For escaping strings printed by object and array literals; not quite
* the same as 'escape.'
*/
public static String escapeString(String s, char escapeQuote)
{
if (!(escapeQuote == '"' || escapeQuote == '\'' || escapeQuote == '`')) Kit.codeBug();
StringBuilder sb = null;
for(int i = 0, L = s.length(); i != L; ++i) {
int c = s.charAt(i);
if (' ' <= c && c <= '~' && c != escapeQuote && c != '\\') {
// an ordinary print character (like C isprint()) and not "
// or \ .
if (sb != null) {
sb.append((char)c);
}
continue;
}
if (sb == null) {
sb = new StringBuilder(L + 3);
sb.append(s);
sb.setLength(i);
}
int escape = -1;
switch (c) {
case '\b': escape = 'b'; break;
case '\f': escape = 'f'; break;
case '\n': escape = 'n'; break;
case '\r': escape = 'r'; break;
case '\t': escape = 't'; break;
case 0xb: escape = 'v'; break; // Java lacks \v.
case ' ': escape = ' '; break;
case '\\': escape = '\\'; break;
}
if (escape >= 0) {
// an \escaped sort of character
sb.append('\\');
sb.append((char)escape);
} else if (c == escapeQuote) {
sb.append('\\');
sb.append(escapeQuote);
} else {
int hexSize;
if (c < 256) {
// 2-digit hex
sb.append("\\x");
hexSize = 2;
} else {
// Unicode.
sb.append("\\u");
hexSize = 4;
}
// append hexadecimal form of c left-padded with 0
for (int shift = (hexSize - 1) * 4; shift >= 0; shift -= 4) {
int digit = 0xf & (c >> shift);
int hc = (digit < 10) ? '0' + digit : 'a' - 10 + digit;
sb.append((char)hc);
}
}
}
return (sb == null) ? s : sb.toString();
}
static boolean isValidIdentifierName(String s, Context cx, boolean isStrict)
{
int L = s.length();
if (L == 0)
return false;
if (!Character.isJavaIdentifierStart(s.charAt(0)))
return false;
for (int i = 1; i != L; ++i) {
if (!Character.isJavaIdentifierPart(s.charAt(i)))
return false;
}
return !TokenStream.isKeyword(s, cx.getLanguageVersion(), isStrict);
}
public static CharSequence toCharSequence(Object val) {
if (val instanceof NativeString) {
return ((NativeString)val).toCharSequence();
}
return val instanceof CharSequence ? (CharSequence) val : toString(val);
}
/**
* Convert the value to a string.
*
* See ECMA 9.8.
*/
public static String toString(Object val) {
for (;;) {
if (val == null) {
return "null";
}
if (val == Undefined.instance || val == Undefined.SCRIPTABLE_UNDEFINED) {
return "undefined";
}
if (val instanceof String) {
return (String)val;
}
if (val instanceof CharSequence) {
return val.toString();
}
if (val instanceof Number) {
// XXX should we just teach NativeNumber.stringValue()
// about Numbers?
return numberToString(((Number)val).doubleValue(), 10);
}
if (val instanceof Symbol) {
throw typeError0("msg.not.a.string");
}
if (val instanceof Scriptable) {
val = ((Scriptable) val).getDefaultValue(StringClass);
if ((val instanceof Scriptable) && !isSymbol(val)) {
throw errorWithClassName("msg.primitive.expected", val);
}
continue;
}
return val.toString();
}
}
static String defaultObjectToString(Scriptable obj)
{
if (obj == null)
return "[object Null]";
if (Undefined.isUndefined(obj))
return "[object Undefined]";
return "[object " + obj.getClassName() + ']';
}
public static String toString(Object[] args, int index)
{
return (index < args.length) ? toString(args[index]) : "undefined";
}
/**
* Optimized version of toString(Object) for numbers.
*/
public static String toString(double val) {
return numberToString(val, 10);
}
public static String numberToString(double d, int base) {
if ((base < 2) || (base > 36)) {
throw Context.reportRuntimeError1(
"msg.bad.radix", Integer.toString(base));
}
if (Double.isNaN(d))
return "NaN";
if (d == Double.POSITIVE_INFINITY)
return "Infinity";
if (d == Double.NEGATIVE_INFINITY)
return "-Infinity";
if (d == 0.0)
return "0";
if (base != 10) {
return DToA.JS_dtobasestr(base, d);
}
// V8 FastDtoa can't convert all numbers, so try it first but
// fall back to old DToA in case it fails
String result = FastDtoa.numberToString(d);
if (result != null) {
return result;
}
StringBuilder buffer = new StringBuilder();
DToA.JS_dtostr(buffer, DToA.DTOSTR_STANDARD, 0, d);
return buffer.toString();
}
static String uneval(Context cx, Scriptable scope, Object value)
{
if (value == null) {
return "null";
}
if (value == Undefined.instance) {
return "undefined";
}
if (value instanceof CharSequence) {
String escaped = escapeString(value.toString());
StringBuilder sb = new StringBuilder(escaped.length() + 2);
sb.append('\"');
sb.append(escaped);
sb.append('\"');
return sb.toString();
}
if (value instanceof Number) {
double d = ((Number)value).doubleValue();
if (d == 0 && 1 / d < 0) {
return "-0";
}
return toString(d);
}
if (value instanceof Boolean) {
return toString(value);
}
if (value instanceof Scriptable) {
Scriptable obj = (Scriptable)value;
// Wrapped Java objects won't have "toSource" and will report
// errors for get()s of nonexistent name, so use has() first
if (ScriptableObject.hasProperty(obj, "toSource")) {
Object v = ScriptableObject.getProperty(obj, "toSource");
if (v instanceof Function) {
Function f = (Function)v;
return toString(f.call(cx, scope, obj, emptyArgs));
}
}
return toString(value);
}
warnAboutNonJSObject(value);
return value.toString();
}
static String defaultObjectToSource(Context cx, Scriptable scope,
Scriptable thisObj, Object[] args)
{
boolean toplevel, iterating;
if (cx.iterating == null) {
toplevel = true;
iterating = false;
cx.iterating = new ObjToIntMap(31);
} else {
toplevel = false;
iterating = cx.iterating.has(thisObj);
}
StringBuilder result = new StringBuilder(128);
if (toplevel) {
result.append("(");
}
result.append('{');
// Make sure cx.iterating is set to null when done
// so we don't leak memory
try {
if (!iterating) {
cx.iterating.intern(thisObj); // stop recursion.
Object[] ids = thisObj.getIds();
for (int i=0; i < ids.length; i++) {
Object id = ids[i];
Object value;
if (id instanceof Integer) {
int intId = ((Integer)id).intValue();
value = thisObj.get(intId, thisObj);
if (value == Scriptable.NOT_FOUND)
continue; // a property has been removed
if (i > 0)
result.append(", ");
result.append(intId);
} else {
String strId = (String)id;
value = thisObj.get(strId, thisObj);
if (value == Scriptable.NOT_FOUND)
continue; // a property has been removed
if (i > 0)
result.append(", ");
if (ScriptRuntime.isValidIdentifierName(strId, cx, cx.isStrictMode())) {
result.append(strId);
} else {
result.append('\'');
result.append(
ScriptRuntime.escapeString(strId, '\''));
result.append('\'');
}
}
result.append(':');
result.append(ScriptRuntime.uneval(cx, scope, value));
}
}
} finally {
if (toplevel) {
cx.iterating = null;
}
}
result.append('}');
if (toplevel) {
result.append(')');
}
return result.toString();
}
public static Scriptable toObject(Scriptable scope, Object val)
{
if (val instanceof Scriptable) {
return (Scriptable)val;
}
return toObject(Context.getContext(), scope, val);
}
/**
* Warning: This doesn't allow to resolve primitive
* prototype properly when many top scopes are involved
*
* @deprecated Use {@link #toObjectOrNull(Context, Object, Scriptable)} instead
*/
@Deprecated
public static Scriptable toObjectOrNull(Context cx, Object obj)
{
if (obj instanceof Scriptable) {
return (Scriptable)obj;
} else if (obj != null && obj != Undefined.instance) {
return toObject(cx, getTopCallScope(cx), obj);
}
return null;
}
/**
* @param scope the scope that should be used to resolve primitive prototype
*/
public static Scriptable toObjectOrNull(Context cx, Object obj,
Scriptable scope)
{
if (obj instanceof Scriptable) {
return (Scriptable)obj;
} else if (obj != null && obj != Undefined.instance) {
return toObject(cx, scope, obj);
}
return null;
}
/**
* @deprecated Use {@link #toObject(Scriptable, Object)} instead.
*/
@Deprecated
public static Scriptable toObject(Scriptable scope, Object val,
Class staticClass)
{
if (val instanceof Scriptable) {
return (Scriptable)val;
}
return toObject(Context.getContext(), scope, val);
}
/**
* Convert the value to an object.
*
* See ECMA 9.9.
*/
public static Scriptable toObject(Context cx, Scriptable scope, Object val)
{
if (val == null) {
throw typeError0("msg.null.to.object");
}
if (Undefined.isUndefined(val)) {
throw typeError0("msg.undef.to.object");
}
if (isSymbol(val)) {
NativeSymbol result = new NativeSymbol((NativeSymbol)val);
setBuiltinProtoAndParent(result, scope, TopLevel.Builtins.Symbol);
return result;
}
if (val instanceof Scriptable) {
return (Scriptable) val;
}
if (val instanceof CharSequence) {
// FIXME we want to avoid toString() here, especially for concat()
NativeString result = new NativeString((CharSequence)val);
setBuiltinProtoAndParent(result, scope, TopLevel.Builtins.String);
return result;
}
if (val instanceof Number) {
NativeNumber result = new NativeNumber(((Number)val).doubleValue());
setBuiltinProtoAndParent(result, scope, TopLevel.Builtins.Number);
return result;
}
if (val instanceof Boolean) {
NativeBoolean result = new NativeBoolean(((Boolean)val).booleanValue());
setBuiltinProtoAndParent(result, scope, TopLevel.Builtins.Boolean);
return result;
}
// Extension: Wrap as a LiveConnect object.
Object wrapped = cx.getWrapFactory().wrap(cx, scope, val, null);
if (wrapped instanceof Scriptable)
return (Scriptable) wrapped;
throw errorWithClassName("msg.invalid.type", val);
}
/**
* @deprecated Use {@link #toObject(Context, Scriptable, Object)} instead.
*/
@Deprecated
public static Scriptable toObject(Context cx, Scriptable scope, Object val,
Class staticClass)
{
return toObject(cx, scope, val);
}
/**
* @deprecated The method is only present for compatibility.
*/
@Deprecated
public static Object call(Context cx, Object fun, Object thisArg,
Object[] args, Scriptable scope)
{
if (!(fun instanceof Function)) {
throw notFunctionError(toString(fun));
}
Function function = (Function)fun;
Scriptable thisObj = toObjectOrNull(cx, thisArg, scope);
if (thisObj == null) {
throw undefCallError(thisObj, "function");
}
return function.call(cx, scope, thisObj, args);
}
public static Scriptable newObject(Context cx, Scriptable scope,
String constructorName, Object[] args)
{
scope = ScriptableObject.getTopLevelScope(scope);
Function ctor = getExistingCtor(cx, scope, constructorName);
if (args == null) { args = ScriptRuntime.emptyArgs; }
return ctor.construct(cx, scope, args);
}
public static Scriptable newBuiltinObject(Context cx, Scriptable scope,
TopLevel.Builtins type,
Object[] args)
{
scope = ScriptableObject.getTopLevelScope(scope);
Function ctor = TopLevel.getBuiltinCtor(cx, scope, type);
if (args == null) { args = ScriptRuntime.emptyArgs; }
return ctor.construct(cx, scope, args);
}
static Scriptable newNativeError(Context cx, Scriptable scope,
TopLevel.NativeErrors type, Object[] args)
{
scope = ScriptableObject.getTopLevelScope(scope);
Function ctor = TopLevel.getNativeErrorCtor(cx, scope, type);
if (args == null) { args = ScriptRuntime.emptyArgs; }
return ctor.construct(cx, scope, args);
}
/**
*
* See ECMA 9.4.
*/
public static double toInteger(Object val) {
return toInteger(toNumber(val));
}
// convenience method
public static double toInteger(double d) {
// if it's NaN
if (Double.isNaN(d))
return +0.0;
if ((d == 0.0) || Double.isInfinite(d))
return d;
if (d > 0.0)
return Math.floor(d);
return Math.ceil(d);
}
public static double toInteger(Object[] args, int index) {
return (index < args.length) ? toInteger(args[index]) : +0.0;
}
public static long toLength(Object[] args, int index) {
double len = toInteger(args, index);
if (len <= +0.0) {
return 0;
}
return (long) Math.min(len, NativeNumber.MAX_SAFE_INTEGER);
}
/**
*
* See ECMA 9.5.
*/
public static int toInt32(Object val)
{
// short circuit for common integer values
if (val instanceof Integer)
return ((Integer)val).intValue();
return toInt32(toNumber(val));
}
public static int toInt32(Object[] args, int index) {
return (index < args.length) ? toInt32(args[index]) : 0;
}
public static int toInt32(double d) {
return DoubleConversion.doubleToInt32(d);
}
/**
* See ECMA 9.6.
* @return long value representing 32 bits unsigned integer
*/
public static long toUint32(double d) {
return DoubleConversion.doubleToInt32(d) & 0xffffffffL;
}
public static long toUint32(Object val) {
return toUint32(toNumber(val));
}
/**
*
* See ECMA 9.7.
*/
public static char toUint16(Object val) {
double d = toNumber(val);
return (char)DoubleConversion.doubleToInt32(d);
}
// XXX: this is until setDefaultNamespace will learn how to store NS
// properly and separates namespace form Scriptable.get etc.
private static final String DEFAULT_NS_TAG = "__default_namespace__";
public static Object setDefaultNamespace(Object namespace, Context cx)
{
Scriptable scope = cx.currentActivationCall;
if (scope == null) {
scope = getTopCallScope(cx);
}
XMLLib xmlLib = currentXMLLib(cx);
Object ns = xmlLib.toDefaultXmlNamespace(cx, namespace);
// XXX : this should be in separated namesapce from Scriptable.get/put
if (!scope.has(DEFAULT_NS_TAG, scope)) {
// XXX: this is racy of cause
ScriptableObject.defineProperty(scope, DEFAULT_NS_TAG, ns,
ScriptableObject.PERMANENT
| ScriptableObject.DONTENUM);
} else {
scope.put(DEFAULT_NS_TAG, scope, ns);
}
return Undefined.instance;
}
public static Object searchDefaultNamespace(Context cx)
{
Scriptable scope = cx.currentActivationCall;
if (scope == null) {
scope = getTopCallScope(cx);
}
Object nsObject;
for (;;) {
Scriptable parent = scope.getParentScope();
if (parent == null) {
nsObject = ScriptableObject.getProperty(scope, DEFAULT_NS_TAG);
if (nsObject == Scriptable.NOT_FOUND) {
return null;
}
break;
}
nsObject = scope.get(DEFAULT_NS_TAG, scope);
if (nsObject != Scriptable.NOT_FOUND) {
break;
}
scope = parent;
}
return nsObject;
}
public static Object getTopLevelProp(Scriptable scope, String id) {
scope = ScriptableObject.getTopLevelScope(scope);
return ScriptableObject.getProperty(scope, id);
}
static Function getExistingCtor(Context cx, Scriptable scope,
String constructorName)
{
Object ctorVal = ScriptableObject.getProperty(scope, constructorName);
if (ctorVal instanceof Function) {
return (Function)ctorVal;
}
if (ctorVal == Scriptable.NOT_FOUND) {
throw Context.reportRuntimeError1(
"msg.ctor.not.found", constructorName);
}
throw Context.reportRuntimeError1("msg.not.ctor", constructorName);
}
/**
* Return -1L if str is not an index, or the index value as lower 32
* bits of the result. Note that the result needs to be cast to an int
* in order to produce the actual index, which may be negative.
*/
public static long indexFromString(String str)
{
// The length of the decimal string representation of
// Integer.MAX_VALUE, 2147483647
final int MAX_VALUE_LENGTH = 10;
int len = str.length();
if (len > 0) {
int i = 0;
boolean negate = false;
int c = str.charAt(0);
if (c == '-') {
if (len > 1) {
c = str.charAt(1);
if (c == '0') return -1L; // "-0" is not an index
i = 1;
negate = true;
}
}
c -= '0';
if (0 <= c && c <= 9
&& len <= (negate ? MAX_VALUE_LENGTH + 1 : MAX_VALUE_LENGTH))
{
// Use negative numbers to accumulate index to handle
// Integer.MIN_VALUE that is greater by 1 in absolute value
// then Integer.MAX_VALUE
int index = -c;
int oldIndex = 0;
i++;
if (index != 0) {
// Note that 00, 01, 000 etc. are not indexes
while (i != len && 0 <= (c = str.charAt(i) - '0') && c <= 9)
{
oldIndex = index;
index = 10 * index - c;
i++;
}
}
// Make sure all characters were consumed and that it couldn't
// have overflowed.
if (i == len &&
(oldIndex > (Integer.MIN_VALUE / 10) ||
(oldIndex == (Integer.MIN_VALUE / 10) &&
c <= (negate ? -(Integer.MIN_VALUE % 10)
: (Integer.MAX_VALUE % 10)))))
{
return 0xFFFFFFFFL & (negate ? index : -index);
}
}
}
return -1L;
}
/**
* If str is a decimal presentation of Uint32 value, return it as long.
* Othewise return -1L;
*/
public static long testUint32String(String str)
{
// The length of the decimal string representation of
// UINT32_MAX_VALUE, 4294967296
final int MAX_VALUE_LENGTH = 10;
int len = str.length();
if (1 <= len && len <= MAX_VALUE_LENGTH) {
int c = str.charAt(0);
c -= '0';
if (c == 0) {
// Note that 00,01 etc. are not valid Uint32 presentations
return (len == 1) ? 0L : -1L;
}
if (1 <= c && c <= 9) {
long v = c;
for (int i = 1; i != len; ++i) {
c = str.charAt(i) - '0';
if (!(0 <= c && c <= 9)) {
return -1;
}
v = 10 * v + c;
}
// Check for overflow
if ((v >>> 32) == 0) {
return v;
}
}
}
return -1;
}
/**
* If s represents index, then return index value wrapped as Integer
* and othewise return s.
*/
static Object getIndexObject(String s)
{
long indexTest = indexFromString(s);
if (indexTest >= 0) {
return Integer.valueOf((int)indexTest);
}
return s;
}
/**
* If d is exact int value, return its value wrapped as Integer
* and othewise return d converted to String.
*/
static Object getIndexObject(double d)
{
int i = (int)d;
if (i == d) {
return Integer.valueOf(i);
}
return toString(d);
}
/**
* If toString(id) is a decimal presentation of int32 value, then id
* is index. In this case return null and make the index available
* as ScriptRuntime.lastIndexResult(cx). Otherwise return toString(id).
*/
static String toStringIdOrIndex(Context cx, Object id)
{
if (id instanceof Number) {
double d = ((Number)id).doubleValue();
int index = (int)d;
if (index == d) {
storeIndexResult(cx, index);
return null;
}
return toString(id);
}
String s;
if (id instanceof String) {
s = (String)id;
} else {
s = toString(id);
}
long indexTest = indexFromString(s);
if (indexTest >= 0) {
storeIndexResult(cx, (int)indexTest);
return null;
}
return s;
}
/**
* Call obj.[[Get]](id)
*
* @deprecated Use {@link #getObjectElem(Object, Object, Context, Scriptable)} instead
*/
@Deprecated
public static Object getObjectElem(Object obj, Object elem, Context cx)
{
return getObjectElem(obj, elem, cx, getTopCallScope(cx));
}
/**
* Call obj.[[Get]](id)
*/
public static Object getObjectElem(Object obj, Object elem, Context cx, Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefReadError(obj, elem);
}
return getObjectElem(sobj, elem, cx);
}
public static Object getObjectElem(Scriptable obj, Object elem,
Context cx)
{
Object result;
if (obj instanceof XMLObject) {
result = ((XMLObject)obj).get(cx, elem);
} else if (isSymbol(elem)) {
result = ScriptableObject.getProperty(obj, (Symbol)elem);
} else {
String s = toStringIdOrIndex(cx, elem);
if (s == null) {
int index = lastIndexResult(cx);
result = ScriptableObject.getProperty(obj, index);
} else {
result = ScriptableObject.getProperty(obj, s);
}
}
if (result == Scriptable.NOT_FOUND) {
result = Undefined.instance;
}
return result;
}
/**
* Version of getObjectElem when elem is a valid JS identifier name.
*
* @deprecated Use {@link #getObjectProp(Object, String, Context, Scriptable)} instead
*/
@Deprecated
public static Object getObjectProp(Object obj, String property,
Context cx)
{
return getObjectProp(obj, property, cx, getTopCallScope(cx));
}
/**
* Version of getObjectElem when elem is a valid JS identifier name.
*
* @param scope the scope that should be used to resolve primitive prototype
*/
public static Object getObjectProp(Object obj, String property,
Context cx, Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefReadError(obj, property);
}
return getObjectProp(sobj, property, cx);
}
public static Object getObjectProp(Scriptable obj, String property,
Context cx)
{
Object result = ScriptableObject.getProperty(obj, property);
if (result == Scriptable.NOT_FOUND) {
if (cx.hasFeature(Context.FEATURE_STRICT_MODE)) {
Context.reportWarning(ScriptRuntime.getMessage1(
"msg.ref.undefined.prop", property));
}
result = Undefined.instance;
}
return result;
}
/**
* @deprecated Use {@link #getObjectPropNoWarn(Object, String, Context, Scriptable)} instead
*/
@Deprecated
public static Object getObjectPropNoWarn(Object obj, String property,
Context cx)
{
return getObjectPropNoWarn(obj, property, cx, getTopCallScope(cx));
}
public static Object getObjectPropNoWarn(Object obj, String property,
Context cx, Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefReadError(obj, property);
}
Object result = ScriptableObject.getProperty(sobj, property);
if (result == Scriptable.NOT_FOUND) {
return Undefined.instance;
}
return result;
}
/**
* A cheaper and less general version of the above for well-known argument
* types.
*
* @deprecated Use {@link #getObjectIndex(Object, double, Context, Scriptable)} instead
*/
@Deprecated
public static Object getObjectIndex(Object obj, double dblIndex,
Context cx)
{
return getObjectIndex(obj, dblIndex, cx, getTopCallScope(cx));
}
/**
* A cheaper and less general version of the above for well-known argument
* types.
*/
public static Object getObjectIndex(Object obj, double dblIndex,
Context cx, Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefReadError(obj, toString(dblIndex));
}
int index = (int)dblIndex;
if (index == dblIndex) {
return getObjectIndex(sobj, index, cx);
}
String s = toString(dblIndex);
return getObjectProp(sobj, s, cx);
}
public static Object getObjectIndex(Scriptable obj, int index,
Context cx)
{
Object result = ScriptableObject.getProperty(obj, index);
if (result == Scriptable.NOT_FOUND) {
result = Undefined.instance;
}
return result;
}
/**
* Call obj.[[Put]](id, value)
*
* @deprecated Use {@link #setObjectElem(Object, Object, Object, Context, Scriptable)} instead
*/
@Deprecated
public static Object setObjectElem(Object obj, Object elem, Object value,
Context cx)
{
return setObjectElem(obj, elem, value, cx, getTopCallScope(cx));
}
/**
* Call obj.[[Put]](id, value)
*/
public static Object setObjectElem(Object obj, Object elem, Object value,
Context cx, Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefWriteError(obj, elem, value);
}
return setObjectElem(sobj, elem, value, cx);
}
public static Object setObjectElem(Scriptable obj, Object elem,
Object value, Context cx)
{
if (obj instanceof XMLObject) {
((XMLObject)obj).put(cx, elem, value);
} else if (isSymbol(elem)) {
ScriptableObject.putProperty(obj, (Symbol)elem, value);
} else {
String s = toStringIdOrIndex(cx, elem);
if (s == null) {
int index = lastIndexResult(cx);
ScriptableObject.putProperty(obj, index, value);
} else {
ScriptableObject.putProperty(obj, s, value);
}
}
return value;
}
/**
* Version of setObjectElem when elem is a valid JS identifier name.
*
* @deprecated Use {@link #setObjectProp(Object, String, Object, Context, Scriptable)} instead
*/
@Deprecated
public static Object setObjectProp(Object obj, String property,
Object value, Context cx)
{
return setObjectProp(obj, property, value, cx, getTopCallScope(cx));
}
/**
* Version of setObjectElem when elem is a valid JS identifier name.
*/
public static Object setObjectProp(Object obj, String property,
Object value, Context cx,
Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefWriteError(obj, property, value);
}
return setObjectProp(sobj, property, value, cx);
}
public static Object setObjectProp(Scriptable obj, String property,
Object value, Context cx)
{
ScriptableObject.putProperty(obj, property, value);
return value;
}
/**
* A cheaper and less general version of the above for well-known argument
* types.
*
* @deprecated Use {@link #setObjectIndex(Object, double, Object, Context, Scriptable)} instead
*/
@Deprecated
public static Object setObjectIndex(Object obj, double dblIndex,
Object value, Context cx)
{
return setObjectIndex(obj, dblIndex, value, cx, getTopCallScope(cx));
}
/**
* A cheaper and less general version of the above for well-known argument
* types.
*/
public static Object setObjectIndex(Object obj, double dblIndex,
Object value, Context cx,
Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw undefWriteError(obj, String.valueOf(dblIndex), value);
}
int index = (int)dblIndex;
if (index == dblIndex) {
return setObjectIndex(sobj, index, value, cx);
}
String s = toString(dblIndex);
return setObjectProp(sobj, s, value, cx);
}
public static Object setObjectIndex(Scriptable obj, int index, Object value,
Context cx)
{
ScriptableObject.putProperty(obj, index, value);
return value;
}
public static boolean deleteObjectElem(Scriptable target, Object elem,
Context cx)
{
if (isSymbol(elem)) {
SymbolScriptable so = ScriptableObject.ensureSymbolScriptable(target);
Symbol s = (Symbol)elem;
so.delete(s);
return !so.has(s, target);
}
String s = toStringIdOrIndex(cx, elem);
if (s == null) {
int index = lastIndexResult(cx);
target.delete(index);
return !target.has(index, target);
}
target.delete(s);
return !target.has(s, target);
}
public static boolean hasObjectElem(Scriptable target, Object elem,
Context cx)
{
boolean result;
if (isSymbol(elem)) {
result = ScriptableObject.hasProperty(target, (Symbol)elem);
} else {
String s = toStringIdOrIndex(cx, elem);
if (s == null) {
int index = lastIndexResult(cx);
result = ScriptableObject.hasProperty(target, index);
} else {
result = ScriptableObject.hasProperty(target, s);
}
}
return result;
}
public static Object refGet(Ref ref, Context cx)
{
return ref.get(cx);
}
/**
* @deprecated Use {@link #refSet(Ref, Object, Context, Scriptable)} instead
*/
@Deprecated
public static Object refSet(Ref ref, Object value, Context cx)
{
return refSet(ref, value, cx, getTopCallScope(cx));
}
public static Object refSet(Ref ref, Object value, Context cx,
Scriptable scope)
{
return ref.set(cx, scope, value);
}
public static Object refDel(Ref ref, Context cx)
{
return wrapBoolean(ref.delete(cx));
}
static boolean isSpecialProperty(String s)
{
return s.equals("__proto__") || s.equals("__parent__");
}
/**
* @deprecated Use {@link #specialRef(Object, String, Context, Scriptable)} instead
*/
@Deprecated
public static Ref specialRef(Object obj, String specialProperty,
Context cx)
{
return specialRef(obj, specialProperty, cx, getTopCallScope(cx));
}
public static Ref specialRef(Object obj, String specialProperty,
Context cx, Scriptable scope)
{
return SpecialRef.createSpecial(cx, scope, obj, specialProperty);
}
/**
* @deprecated Use {@link #delete(Object, Object, Context, Scriptable, boolean)} instead
*/
@Deprecated
public static Object delete(Object obj, Object id, Context cx)
{
return delete(obj, id, cx, false);
}
/**
* The delete operator
*
* See ECMA 11.4.1
*
* In ECMA 0.19, the description of the delete operator (11.4.1)
* assumes that the [[Delete]] method returns a value. However,
* the definition of the [[Delete]] operator (8.6.2.5) does not
* define a return value. Here we assume that the [[Delete]]
* method doesn't return a value.
*
* @deprecated Use {@link #delete(Object, Object, Context, Scriptable, boolean)} instead
*/
@Deprecated
public static Object delete(Object obj, Object id, Context cx, boolean isName)
{
return delete(obj, id, cx, getTopCallScope(cx), isName);
}
/**
* The delete operator
*
* See ECMA 11.4.1
*
* In ECMA 0.19, the description of the delete operator (11.4.1)
* assumes that the [[Delete]] method returns a value. However,
* the definition of the [[Delete]] operator (8.6.2.5) does not
* define a return value. Here we assume that the [[Delete]]
* method doesn't return a value.
*/
public static Object delete(Object obj, Object id, Context cx,
Scriptable scope, boolean isName)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
if (isName) {
return Boolean.TRUE;
}
throw undefDeleteError(obj, id);
}
boolean result = deleteObjectElem(sobj, id, cx);
return wrapBoolean(result);
}
/**
* Looks up a name in the scope chain and returns its value.
*/
public static Object name(Context cx, Scriptable scope, String name)
{
Scriptable parent = scope.getParentScope();
if (parent == null) {
Object result = topScopeName(cx, scope, name);
if (result == Scriptable.NOT_FOUND) {
throw notFoundError(scope, name);
}
return result;
}
return nameOrFunction(cx, scope, parent, name, false);
}
private static Object nameOrFunction(Context cx, Scriptable scope,
Scriptable parentScope, String name,
boolean asFunctionCall)
{
Object result;
Scriptable thisObj = scope; // It is used only if asFunctionCall==true.
XMLObject firstXMLObject = null;
for (;;) {
if (scope instanceof NativeWith) {
Scriptable withObj = scope.getPrototype();
if (withObj instanceof XMLObject) {
XMLObject xmlObj = (XMLObject)withObj;
if (xmlObj.has(name, xmlObj)) {
// function this should be the target object of with
thisObj = xmlObj;
result = xmlObj.get(name, xmlObj);
break;
}
if (firstXMLObject == null) {
firstXMLObject = xmlObj;
}
} else {
result = ScriptableObject.getProperty(withObj, name);
if (result != Scriptable.NOT_FOUND) {
// function this should be the target object of with
thisObj = withObj;
break;
}
}
} else if (scope instanceof NativeCall) {
// NativeCall does not prototype chain and Scriptable.get
// can be called directly.
result = scope.get(name, scope);
if (result != Scriptable.NOT_FOUND) {
if (asFunctionCall) {
// ECMA 262 requires that this for nested funtions
// should be top scope
thisObj = ScriptableObject.
getTopLevelScope(parentScope);
}
break;
}
} else {
// Can happen if Rhino embedding decided that nested
// scopes are useful for what ever reasons.
result = ScriptableObject.getProperty(scope, name);
if (result != Scriptable.NOT_FOUND) {
thisObj = scope;
break;
}
}
scope = parentScope;
parentScope = parentScope.getParentScope();
if (parentScope == null) {
result = topScopeName(cx, scope, name);
if (result == Scriptable.NOT_FOUND) {
if (firstXMLObject == null || asFunctionCall) {
throw notFoundError(scope, name);
}
// The name was not found, but we did find an XML
// object in the scope chain and we are looking for name,
// not function. The result should be an empty XMLList
// in name context.
result = firstXMLObject.get(name, firstXMLObject);
}
// For top scope thisObj for functions is always scope itself.
thisObj = scope;
break;
}
}
if (asFunctionCall) {
if (!(result instanceof Callable)) {
throw notFunctionError(result, name);
}
storeScriptable(cx, thisObj);
}
return result;
}
private static Object topScopeName(Context cx, Scriptable scope,
String name)
{
if (cx.useDynamicScope) {
scope = checkDynamicScope(cx.topCallScope, scope);
}
return ScriptableObject.getProperty(scope, name);
}
/**
* Returns the object in the scope chain that has a given property.
*
* The order of evaluation of an assignment expression involves
* evaluating the lhs to a reference, evaluating the rhs, and then
* modifying the reference with the rhs value. This method is used
* to 'bind' the given name to an object containing that property
* so that the side effects of evaluating the rhs do not affect
* which property is modified.
* Typically used in conjunction with setName.
*
* See ECMA 10.1.4
*/
public static Scriptable bind(Context cx, Scriptable scope, String id)
{
Scriptable firstXMLObject = null;
Scriptable parent = scope.getParentScope();
childScopesChecks: if (parent != null) {
// Check for possibly nested "with" scopes first
while (scope instanceof NativeWith) {
Scriptable withObj = scope.getPrototype();
if (withObj instanceof XMLObject) {
XMLObject xmlObject = (XMLObject)withObj;
if (xmlObject.has(cx, id)) {
return xmlObject;
}
if (firstXMLObject == null) {
firstXMLObject = xmlObject;
}
} else {
if (ScriptableObject.hasProperty(withObj, id)) {
return withObj;
}
}
scope = parent;
parent = parent.getParentScope();
if (parent == null) {
break childScopesChecks;
}
}
for (;;) {
if (ScriptableObject.hasProperty(scope, id)) {
return scope;
}
scope = parent;
parent = parent.getParentScope();
if (parent == null) {
break childScopesChecks;
}
}
}
// scope here is top scope
if (cx.useDynamicScope) {
scope = checkDynamicScope(cx.topCallScope, scope);
}
if (ScriptableObject.hasProperty(scope, id)) {
return scope;
}
// Nothing was found, but since XML objects always bind
// return one if found
return firstXMLObject;
}
public static Object setName(Scriptable bound, Object value,
Context cx, Scriptable scope, String id)
{
if (bound != null) {
// TODO: we used to special-case XMLObject here, but putProperty
// seems to work for E4X and it's better to optimize the common case
ScriptableObject.putProperty(bound, id, value);
} else {
// "newname = 7;", where 'newname' has not yet
// been defined, creates a new property in the
// top scope unless strict mode is specified.
if (cx.hasFeature(Context.FEATURE_STRICT_MODE) ||
cx.hasFeature(Context.FEATURE_STRICT_VARS))
{
Context.reportWarning(
ScriptRuntime.getMessage1("msg.assn.create.strict", id));
}
// Find the top scope by walking up the scope chain.
bound = ScriptableObject.getTopLevelScope(scope);
if (cx.useDynamicScope) {
bound = checkDynamicScope(cx.topCallScope, bound);
}
bound.put(id, bound, value);
}
return value;
}
public static Object strictSetName(Scriptable bound, Object value,
Context cx, Scriptable scope, String id) {
if (bound != null) {
// TODO: The LeftHandSide also may not be a reference to a
// data property with the attribute value {[[Writable]]:false},
// to an accessor property with the attribute value
// {[[Put]]:undefined}, nor to a non-existent property of an
// object whose [[Extensible]] internal property has the value
// false. In these cases a TypeError exception is thrown (11.13.1).
// TODO: we used to special-case XMLObject here, but putProperty
// seems to work for E4X and we should optimize the common case
ScriptableObject.putProperty(bound, id, value);
return value;
}
// See ES5 8.7.2
String msg = "Assignment to undefined \"" + id + "\" in strict mode";
throw constructError("ReferenceError", msg);
}
public static Object setConst(Scriptable bound, Object value,
Context cx, String id)
{
if (bound instanceof XMLObject) {
bound.put(id, bound, value);
} else {
ScriptableObject.putConstProperty(bound, id, value);
}
return value;
}
/**
* This is the enumeration needed by the for..in statement.
*
* See ECMA 12.6.3.
*
* IdEnumeration maintains a ObjToIntMap to make sure a given
* id is enumerated only once across multiple objects in a
* prototype chain.
*
* XXX - ECMA delete doesn't hide properties in the prototype,
* but js/ref does. This means that the js/ref for..in can
* avoid maintaining a hash table and instead perform lookups
* to see if a given property has already been enumerated.
*
*/
private static class IdEnumeration implements Serializable {
private static final long serialVersionUID = 1L;
Scriptable obj;
Object[] ids;
ObjToIntMap used;
Object currentId;
int index;
int enumType; /* one of ENUM_INIT_KEYS, ENUM_INIT_VALUES,
ENUM_INIT_ARRAY, ENUMERATE_VALUES_IN_ORDER */
// if true, integer ids will be returned as numbers rather than strings
boolean enumNumbers;
Scriptable iterator;
}
public static Scriptable toIterator(Context cx, Scriptable scope,
Scriptable obj, boolean keyOnly)
{
if (ScriptableObject.hasProperty(obj,
NativeIterator.ITERATOR_PROPERTY_NAME))
{
Object v = ScriptableObject.getProperty(obj,
NativeIterator.ITERATOR_PROPERTY_NAME);
if (!(v instanceof Callable)) {
throw typeError0("msg.invalid.iterator");
}
Callable f = (Callable) v;
Object[] args = new Object[] { keyOnly ? Boolean.TRUE
: Boolean.FALSE };
v = f.call(cx, scope, obj, args);
if (!(v instanceof Scriptable)) {
throw typeError0("msg.iterator.primitive");
}
return (Scriptable) v;
}
return null;
}
/**
* For backwards compatibility with generated class files
*
* @deprecated Use {@link #enumInit(Object, Context, Scriptable, int)} instead
*/
@Deprecated
public static Object enumInit(Object value, Context cx, boolean enumValues)
{
return enumInit(value, cx, enumValues ? ENUMERATE_VALUES
: ENUMERATE_KEYS);
}
public static final int ENUMERATE_KEYS = 0;
public static final int ENUMERATE_VALUES = 1;
public static final int ENUMERATE_ARRAY = 2;
public static final int ENUMERATE_KEYS_NO_ITERATOR = 3;
public static final int ENUMERATE_VALUES_NO_ITERATOR = 4;
public static final int ENUMERATE_ARRAY_NO_ITERATOR = 5;
public static final int ENUMERATE_VALUES_IN_ORDER = 6;
/**
* @deprecated Use {@link #enumInit(Object, Context, Scriptable, int)} instead
*/
@Deprecated
public static Object enumInit(Object value, Context cx, int enumType)
{
return enumInit(value, cx, getTopCallScope(cx), enumType);
}
public static Object enumInit(Object value, Context cx, Scriptable scope,
int enumType)
{
IdEnumeration x = new IdEnumeration();
x.obj = toObjectOrNull(cx, value, scope);
// "for of" loop
if (enumType == ENUMERATE_VALUES_IN_ORDER) {
x.enumType = enumType;
x.iterator = null;
return enumInitInOrder(cx, x);
}
if (x.obj == null) {
// null or undefined do not cause errors but rather lead to empty
// "for in" loop
return x;
}
x.enumType = enumType;
x.iterator = null;
if (enumType != ENUMERATE_KEYS_NO_ITERATOR &&
enumType != ENUMERATE_VALUES_NO_ITERATOR &&
enumType != ENUMERATE_ARRAY_NO_ITERATOR)
{
x.iterator = toIterator(cx, x.obj.getParentScope(), x.obj,
enumType == ScriptRuntime.ENUMERATE_KEYS);
}
if (x.iterator == null) {
// enumInit should read all initial ids before returning
// or "for (a.i in a)" would wrongly enumerate i in a as well
enumChangeObject(x);
}
return x;
}
private static Object enumInitInOrder(Context cx, IdEnumeration x) {
if (!(x.obj instanceof SymbolScriptable) || !ScriptableObject.hasProperty(x.obj, SymbolKey.ITERATOR)) {
throw typeError1("msg.not.iterable", toString(x.obj));
}
Object iterator = ScriptableObject.getProperty(x.obj, SymbolKey.ITERATOR);
if (!(iterator instanceof Callable)) {
throw typeError1("msg.not.iterable", toString(x.obj));
}
Callable f = (Callable) iterator;
Scriptable scope = x.obj.getParentScope();
Object[] args = new Object[] {};
Object v = f.call(cx, scope, x.obj, args);
if (!(v instanceof Scriptable)) {
throw typeError1("msg.not.iterable", toString(x.obj));
}
x.iterator = (Scriptable) v;
return x;
}
public static void setEnumNumbers(Object enumObj, boolean enumNumbers) {
((IdEnumeration)enumObj).enumNumbers = enumNumbers;
}
public static Boolean enumNext(Object enumObj)
{
IdEnumeration x = (IdEnumeration)enumObj;
if (x.iterator != null) {
if (x.enumType == ENUMERATE_VALUES_IN_ORDER) {
return enumNextInOrder(x);
}
Object v = ScriptableObject.getProperty(x.iterator, "next");
if (!(v instanceof Callable))
return Boolean.FALSE;
Callable f = (Callable) v;
Context cx = Context.getContext();
try {
x.currentId = f.call(cx, x.iterator.getParentScope(),
x.iterator, emptyArgs);
return Boolean.TRUE;
} catch (JavaScriptException e) {
if (e.getValue() instanceof NativeIterator.StopIteration) {
return Boolean.FALSE;
}
throw e;
}
}
for (;;) {
if (x.obj == null) {
return Boolean.FALSE;
}
if (x.index == x.ids.length) {
x.obj = x.obj.getPrototype();
enumChangeObject(x);
continue;
}
Object id = x.ids[x.index++];
if (x.used != null && x.used.has(id)) {
continue;
}
if (id instanceof Symbol) {
continue;
} else if (id instanceof String) {
String strId = (String) id;
if (!x.obj.has(strId, x.obj))
continue; // must have been deleted
x.currentId = strId;
} else {
int intId = ((Number)id).intValue();
if (!x.obj.has(intId, x.obj))
continue; // must have been deleted
x.currentId = x.enumNumbers ? (Object) (Integer.valueOf(intId))
: String.valueOf(intId);
}
return Boolean.TRUE;
}
}
private static Boolean enumNextInOrder(IdEnumeration enumObj)
{
Object v = ScriptableObject.getProperty(enumObj.iterator, ES6Iterator.NEXT_METHOD);
if (!(v instanceof Callable)) {
throw notFunctionError(enumObj.iterator, ES6Iterator.NEXT_METHOD);
}
Callable f = (Callable) v;
Context cx = Context.getContext();
Scriptable scope = enumObj.iterator.getParentScope();
Object r = f.call(cx, scope, enumObj.iterator, emptyArgs);
Scriptable iteratorResult = toObject(cx, scope, r);
Object done = ScriptableObject.getProperty(iteratorResult, ES6Iterator.DONE_PROPERTY);
if (done != ScriptableObject.NOT_FOUND && toBoolean(done)) {
return Boolean.FALSE;
}
enumObj.currentId = ScriptableObject.getProperty(iteratorResult, ES6Iterator.VALUE_PROPERTY);
return Boolean.TRUE;
}
public static Object enumId(Object enumObj, Context cx)
{
IdEnumeration x = (IdEnumeration)enumObj;
if (x.iterator != null) {
return x.currentId;
}
switch (x.enumType) {
case ENUMERATE_KEYS:
case ENUMERATE_KEYS_NO_ITERATOR:
return x.currentId;
case ENUMERATE_VALUES:
case ENUMERATE_VALUES_NO_ITERATOR:
return enumValue(enumObj, cx);
case ENUMERATE_ARRAY:
case ENUMERATE_ARRAY_NO_ITERATOR:
Object[] elements = { x.currentId, enumValue(enumObj, cx) };
return cx.newArray(ScriptableObject.getTopLevelScope(x.obj), elements);
default:
throw Kit.codeBug();
}
}
public static Object enumValue(Object enumObj, Context cx) {
IdEnumeration x = (IdEnumeration)enumObj;
Object result;
if (isSymbol(x.currentId)) {
SymbolScriptable so = ScriptableObject.ensureSymbolScriptable(x.obj);
result = so.get((Symbol)x.currentId, x.obj);
} else {
String s = toStringIdOrIndex(cx, x.currentId);
if (s == null) {
int index = lastIndexResult(cx);
result = x.obj.get(index, x.obj);
} else {
result = x.obj.get(s, x.obj);
}
}
return result;
}
private static void enumChangeObject(IdEnumeration x)
{
Object[] ids = null;
while (x.obj != null) {
ids = x.obj.getIds();
if (ids.length != 0) {
break;
}
x.obj = x.obj.getPrototype();
}
if (x.obj != null && x.ids != null) {
Object[] previous = x.ids;
int L = previous.length;
if (x.used == null) {
x.used = new ObjToIntMap(L);
}
for (int i = 0; i != L; ++i) {
x.used.intern(previous[i]);
}
}
x.ids = ids;
x.index = 0;
}
/**
* Prepare for calling name(...): return function corresponding to
* name and make current top scope available
* as ScriptRuntime.lastStoredScriptable() for consumption as thisObj.
* The caller must call ScriptRuntime.lastStoredScriptable() immediately
* after calling this method.
*/
public static Callable getNameFunctionAndThis(String name,
Context cx,
Scriptable scope)
{
Scriptable parent = scope.getParentScope();
if (parent == null) {
Object result = topScopeName(cx, scope, name);
if (!(result instanceof Callable)) {
if (result == Scriptable.NOT_FOUND) {
throw notFoundError(scope, name);
}
throw notFunctionError(result, name);
}
// Top scope is not NativeWith or NativeCall => thisObj == scope
Scriptable thisObj = scope;
storeScriptable(cx, thisObj);
return (Callable)result;
}
// name will call storeScriptable(cx, thisObj);
return (Callable)nameOrFunction(cx, scope, parent, name, true);
}
/**
* Prepare for calling obj[id](...): return function corresponding to
* obj[id] and make obj properly converted to Scriptable available
* as ScriptRuntime.lastStoredScriptable() for consumption as thisObj.
* The caller must call ScriptRuntime.lastStoredScriptable() immediately
* after calling this method.
*
* @deprecated Use {@link #getElemFunctionAndThis(Object, Object, Context, Scriptable)} instead
*/
@Deprecated
public static Callable getElemFunctionAndThis(Object obj,
Object elem,
Context cx)
{
return getElemFunctionAndThis(obj, elem, cx, getTopCallScope(cx));
}
/**
* Prepare for calling obj[id](...): return function corresponding to
* obj[id] and make obj properly converted to Scriptable available
* as ScriptRuntime.lastStoredScriptable() for consumption as thisObj.
* The caller must call ScriptRuntime.lastStoredScriptable() immediately
* after calling this method.
*/
public static Callable getElemFunctionAndThis(Object obj, Object elem,
Context cx, Scriptable scope)
{
Scriptable thisObj;
Object value;
if (isSymbol(elem)) {
thisObj = toObjectOrNull(cx, obj, scope);
if (thisObj == null) {
throw undefCallError(obj, String.valueOf(elem));
}
value = ScriptableObject.getProperty(thisObj, (Symbol)elem);
} else {
String str = toStringIdOrIndex(cx, elem);
if (str != null) {
return getPropFunctionAndThis(obj, str, cx, scope);
}
int index = lastIndexResult(cx);
thisObj = toObjectOrNull(cx, obj, scope);
if (thisObj == null) {
throw undefCallError(obj, String.valueOf(elem));
}
value = ScriptableObject.getProperty(thisObj, index);
}
if (!(value instanceof Callable)) {
throw notFunctionError(value, elem);
}
storeScriptable(cx, thisObj);
return (Callable)value;
}
/**
* Prepare for calling obj.property(...): return function corresponding to
* obj.property and make obj properly converted to Scriptable available
* as ScriptRuntime.lastStoredScriptable() for consumption as thisObj.
* The caller must call ScriptRuntime.lastStoredScriptable() immediately
* after calling this method.
* Warning: this doesn't allow to resolve primitive prototype properly when
* many top scopes are involved.
*
* @deprecated Use {@link #getPropFunctionAndThis(Object, String, Context, Scriptable)} instead
*/
@Deprecated
public static Callable getPropFunctionAndThis(Object obj,
String property,
Context cx)
{
return getPropFunctionAndThis(obj, property, cx, getTopCallScope(cx));
}
/**
* Prepare for calling obj.property(...): return function corresponding to
* obj.property and make obj properly converted to Scriptable available
* as ScriptRuntime.lastStoredScriptable() for consumption as thisObj.
* The caller must call ScriptRuntime.lastStoredScriptable() immediately
* after calling this method.
*/
public static Callable getPropFunctionAndThis(Object obj,
String property,
Context cx, Scriptable scope)
{
Scriptable thisObj = toObjectOrNull(cx, obj, scope);
return getPropFunctionAndThisHelper(obj, property, cx, thisObj);
}
private static Callable getPropFunctionAndThisHelper(Object obj,
String property, Context cx, Scriptable thisObj)
{
if (thisObj == null) {
throw undefCallError(obj, property);
}
Object value = ScriptableObject.getProperty(thisObj, property);
if (!(value instanceof Callable)) {
Object noSuchMethod = ScriptableObject.getProperty(thisObj, "__noSuchMethod__");
if (noSuchMethod instanceof Callable)
value = new NoSuchMethodShim((Callable)noSuchMethod, property);
}
if (!(value instanceof Callable)) {
throw notFunctionError(thisObj, value, property);
}
storeScriptable(cx, thisObj);
return (Callable)value;
}
/**
* Prepare for calling <expression>(...): return function corresponding to
* <expression> and make parent scope of the function available
* as ScriptRuntime.lastStoredScriptable() for consumption as thisObj.
* The caller must call ScriptRuntime.lastStoredScriptable() immediately
* after calling this method.
*/
public static Callable getValueFunctionAndThis(Object value, Context cx)
{
if (!(value instanceof Callable)) {
throw notFunctionError(value);
}
Callable f = (Callable)value;
Scriptable thisObj = null;
if (f instanceof Scriptable) {
thisObj = ((Scriptable)f).getParentScope();
}
if (thisObj == null) {
if (cx.topCallScope == null) throw new IllegalStateException();
thisObj = cx.topCallScope;
}
if (thisObj.getParentScope() != null) {
if (thisObj instanceof NativeWith) {
// functions defined inside with should have with target
// as their thisObj
} else if (thisObj instanceof NativeCall) {
// nested functions should have top scope as their thisObj
thisObj = ScriptableObject.getTopLevelScope(thisObj);
}
}
storeScriptable(cx, thisObj);
return f;
}
/**
* Given an object, get the "Symbol.iterator" element, throw a TypeError if it
* is not present, then call the result, (throwing a TypeError if the result is
* not a function), and return that result, whatever it is.
*/
public static Object callIterator(Object obj, Context cx, Scriptable scope)
{
final Callable getIterator =
ScriptRuntime.getElemFunctionAndThis(obj, SymbolKey.ITERATOR, cx, scope);
final Scriptable iterable = ScriptRuntime.lastStoredScriptable(cx);
return getIterator.call(cx, scope, iterable, ScriptRuntime.emptyArgs);
}
/**
* Perform function call in reference context. Should always
* return value that can be passed to
* {@link #refGet(Ref, Context)} or {@link #refSet(Ref, Object, Context)}
* arbitrary number of times.
* The args array reference should not be stored in any object that is
* can be GC-reachable after this method returns. If this is necessary,
* store args.clone(), not args array itself.
*/
public static Ref callRef(Callable function, Scriptable thisObj,
Object[] args, Context cx)
{
if (function instanceof RefCallable) {
RefCallable rfunction = (RefCallable)function;
Ref ref = rfunction.refCall(cx, thisObj, args);
if (ref == null) {
throw new IllegalStateException(rfunction.getClass().getName()+".refCall() returned null");
}
return ref;
}
// No runtime support for now
String msg = getMessage1("msg.no.ref.from.function",
toString(function));
throw constructError("ReferenceError", msg);
}
/**
* Operator new.
*
* See ECMA 11.2.2
*/
public static Scriptable newObject(Object fun, Context cx,
Scriptable scope, Object[] args)
{
if (!(fun instanceof Function)) {
throw notFunctionError(fun);
}
Function function = (Function)fun;
return function.construct(cx, scope, args);
}
public static Object callSpecial(Context cx, Callable fun,
Scriptable thisObj,
Object[] args, Scriptable scope,
Scriptable callerThis, int callType,
String filename, int lineNumber)
{
if (callType == Node.SPECIALCALL_EVAL) {
if (thisObj.getParentScope() == null && NativeGlobal.isEvalFunction(fun)) {
return evalSpecial(cx, scope, callerThis, args,
filename, lineNumber);
}
} else if (callType == Node.SPECIALCALL_WITH) {
if (NativeWith.isWithFunction(fun)) {
throw Context.reportRuntimeError1("msg.only.from.new",
"With");
}
} else {
throw Kit.codeBug();
}
return fun.call(cx, scope, thisObj, args);
}
public static Object newSpecial(Context cx, Object fun,
Object[] args, Scriptable scope,
int callType)
{
if (callType == Node.SPECIALCALL_EVAL) {
if (NativeGlobal.isEvalFunction(fun)) {
throw typeError1("msg.not.ctor", "eval");
}
} else if (callType == Node.SPECIALCALL_WITH) {
if (NativeWith.isWithFunction(fun)) {
return NativeWith.newWithSpecial(cx, scope, args);
}
} else {
throw Kit.codeBug();
}
return newObject(fun, cx, scope, args);
}
/**
* Function.prototype.apply and Function.prototype.call
*
* See Ecma 15.3.4.[34]
*/
public static Object applyOrCall(boolean isApply,
Context cx, Scriptable scope,
Scriptable thisObj, Object[] args)
{
int L = args.length;
Callable function = getCallable(thisObj);
Scriptable callThis = null;
if (L != 0) {
if (cx.hasFeature(Context.FEATURE_OLD_UNDEF_NULL_THIS)) {
callThis = toObjectOrNull(cx, args[0], scope);
} else {
callThis = args[0] == Undefined.instance ? Undefined.SCRIPTABLE_UNDEFINED : toObjectOrNull(cx, args[0], scope);
}
}
if (callThis == null && cx.hasFeature(Context.FEATURE_OLD_UNDEF_NULL_THIS)) {
callThis = getTopCallScope(cx); // This covers the case of args[0] == (null|undefined) as well.
}
Object[] callArgs;
if (isApply) {
// Follow Ecma 15.3.4.3
callArgs = L <= 1 ? ScriptRuntime.emptyArgs :
getApplyArguments(cx, args[1]);
} else {
// Follow Ecma 15.3.4.4
if (L <= 1) {
callArgs = ScriptRuntime.emptyArgs;
} else {
callArgs = new Object[L - 1];
System.arraycopy(args, 1, callArgs, 0, L - 1);
}
}
return function.call(cx, scope, callThis, callArgs);
}
/**
* @return true if the passed in Scriptable looks like an array
*/
private static boolean isArrayLike(Scriptable obj)
{
return obj != null && (
obj instanceof NativeArray ||
obj instanceof Arguments ||
ScriptableObject.hasProperty(obj, "length")
);
}
static Object[] getApplyArguments(Context cx, Object arg1)
{
if (arg1 == null || arg1 == Undefined.instance) {
return ScriptRuntime.emptyArgs;
} else if ( arg1 instanceof Scriptable && isArrayLike((Scriptable) arg1) ) {
return cx.getElements((Scriptable) arg1);
} else if( arg1 instanceof ScriptableObject ) {
return ScriptRuntime.emptyArgs;
} else {
throw ScriptRuntime.typeError0("msg.arg.isnt.array");
}
}
static Callable getCallable(Scriptable thisObj)
{
Callable function;
if (thisObj instanceof Callable) {
function = (Callable)thisObj;
} else {
Object value = thisObj.getDefaultValue(ScriptRuntime.FunctionClass);
if (!(value instanceof Callable)) {
throw ScriptRuntime.notFunctionError(value, thisObj);
}
function = (Callable)value;
}
return function;
}
/**
* The eval function property of the global object.
*
* See ECMA 15.1.2.1
*/
public static Object evalSpecial(Context cx, Scriptable scope,
Object thisArg, Object[] args,
String filename, int lineNumber)
{
if (args.length < 1)
return Undefined.instance;
Object x = args[0];
if (!(x instanceof CharSequence)) {
if (cx.hasFeature(Context.FEATURE_STRICT_MODE) ||
cx.hasFeature(Context.FEATURE_STRICT_EVAL))
{
throw Context.reportRuntimeError0("msg.eval.nonstring.strict");
}
String message = ScriptRuntime.getMessage0("msg.eval.nonstring");
Context.reportWarning(message);
return x;
}
if (filename == null) {
int[] linep = new int[1];
filename = Context.getSourcePositionFromStack(linep);
if (filename != null) {
lineNumber = linep[0];
} else {
filename = "";
}
}
String sourceName = ScriptRuntime.
makeUrlForGeneratedScript(true, filename, lineNumber);
ErrorReporter reporter;
reporter = DefaultErrorReporter.forEval(cx.getErrorReporter());
Evaluator evaluator = Context.createInterpreter();
if (evaluator == null) {
throw new JavaScriptException("Interpreter not present",
filename, lineNumber);
}
// Compile with explicit interpreter instance to force interpreter
// mode.
Script script = cx.compileString(x.toString(), evaluator,
reporter, sourceName, 1, null);
evaluator.setEvalScriptFlag(script);
Callable c = (Callable)script;
return c.call(cx, scope, (Scriptable)thisArg, ScriptRuntime.emptyArgs);
}
/**
* The typeof operator
*/
public static String typeof(Object value)
{
if (value == null)
return "object";
if (value == Undefined.instance)
return "undefined";
if (value instanceof ScriptableObject)
return ((ScriptableObject) value).getTypeOf();
if (value instanceof Scriptable)
return (value instanceof Callable) ? "function" : "object";
if (value instanceof CharSequence)
return "string";
if (value instanceof Number)
return "number";
if (value instanceof Boolean)
return "boolean";
throw errorWithClassName("msg.invalid.type", value);
}
/**
* The typeof operator that correctly handles the undefined case
*/
public static String typeofName(Scriptable scope, String id)
{
Context cx = Context.getContext();
Scriptable val = bind(cx, scope, id);
if (val == null)
return "undefined";
return typeof(getObjectProp(val, id, cx));
}
public static boolean isObject(Object value)
{
if (value == null) {
return false;
}
if (Undefined.instance.equals(value)) {
return false;
}
if (value instanceof ScriptableObject) {
String type = ((ScriptableObject)value).getTypeOf();
return "object".equals(type) || "function".equals(type);
}
if (value instanceof Scriptable) {
return (!(value instanceof Callable));
}
return false;
}
// neg:
// implement the '-' operator inline in the caller
// as "-toNumber(val)"
// not:
// implement the '!' operator inline in the caller
// as "!toBoolean(val)"
// bitnot:
// implement the '~' operator inline in the caller
// as "~toInt32(val)"
public static Object add(Object val1, Object val2, Context cx)
{
if(val1 instanceof Number && val2 instanceof Number) {
return wrapNumber(((Number)val1).doubleValue() +
((Number)val2).doubleValue());
}
if (val1 instanceof XMLObject) {
Object test = ((XMLObject)val1).addValues(cx, true, val2);
if (test != Scriptable.NOT_FOUND) {
return test;
}
}
if (val2 instanceof XMLObject) {
Object test = ((XMLObject)val2).addValues(cx, false, val1);
if (test != Scriptable.NOT_FOUND) {
return test;
}
}
if ((val1 instanceof Symbol) || (val2 instanceof Symbol)) {
throw typeError0("msg.not.a.number");
}
if (val1 instanceof Scriptable)
val1 = ((Scriptable) val1).getDefaultValue(null);
if (val2 instanceof Scriptable)
val2 = ((Scriptable) val2).getDefaultValue(null);
if (!(val1 instanceof CharSequence) && !(val2 instanceof CharSequence)) {
if ((val1 instanceof Number) && (val2 instanceof Number)) {
return wrapNumber(((Number)val1).doubleValue() + ((Number)val2).doubleValue());
}
return wrapNumber(toNumber(val1) + toNumber(val2));
}
return new ConsString(toCharSequence(val1), toCharSequence(val2));
}
public static CharSequence add(CharSequence val1, Object val2) {
return new ConsString(val1, toCharSequence(val2));
}
public static CharSequence add(Object val1, CharSequence val2) {
return new ConsString(toCharSequence(val1), val2);
}
/**
* The method is only present for compatibility.
*
* @deprecated Use {@link #nameIncrDecr(Scriptable, String, Context, int)} instead
*/
@Deprecated
public static Object nameIncrDecr(Scriptable scopeChain, String id,
int incrDecrMask)
{
return nameIncrDecr(scopeChain, id, Context.getContext(), incrDecrMask);
}
public static Object nameIncrDecr(Scriptable scopeChain, String id,
Context cx, int incrDecrMask)
{
Scriptable target;
Object value;
search: {
do {
if (cx.useDynamicScope && scopeChain.getParentScope() == null) {
scopeChain = checkDynamicScope(cx.topCallScope, scopeChain);
}
target = scopeChain;
do {
if (target instanceof NativeWith &&
target.getPrototype() instanceof XMLObject) {
break;
}
value = target.get(id, scopeChain);
if (value != Scriptable.NOT_FOUND) {
break search;
}
target = target.getPrototype();
} while (target != null);
scopeChain = scopeChain.getParentScope();
} while (scopeChain != null);
throw notFoundError(scopeChain, id);
}
return doScriptableIncrDecr(target, id, scopeChain, value,
incrDecrMask);
}
/**
* @deprecated Use {@link #propIncrDecr(Object, String, Context, Scriptable, int)} instead
*/
@Deprecated
public static Object propIncrDecr(Object obj, String id,
Context cx, int incrDecrMask)
{
return propIncrDecr(obj, id, cx, getTopCallScope(cx), incrDecrMask);
}
public static Object propIncrDecr(Object obj, String id,
Context cx, Scriptable scope,
int incrDecrMask)
{
Scriptable start = toObjectOrNull(cx, obj, scope);
if (start == null) {
throw undefReadError(obj, id);
}
Scriptable target = start;
Object value;
search: {
do {
value = target.get(id, start);
if (value != Scriptable.NOT_FOUND) {
break search;
}
target = target.getPrototype();
} while (target != null);
start.put(id, start, NaNobj);
return NaNobj;
}
return doScriptableIncrDecr(target, id, start, value,
incrDecrMask);
}
private static Object doScriptableIncrDecr(Scriptable target,
String id,
Scriptable protoChainStart,
Object value,
int incrDecrMask)
{
boolean post = ((incrDecrMask & Node.POST_FLAG) != 0);
double number;
if (value instanceof Number) {
number = ((Number)value).doubleValue();
} else {
number = toNumber(value);
if (post) {
// convert result to number
value = wrapNumber(number);
}
}
if ((incrDecrMask & Node.DECR_FLAG) == 0) {
++number;
} else {
--number;
}
Number result = wrapNumber(number);
target.put(id, protoChainStart, result);
if (post) {
return value;
}
return result;
}
/**
* @deprecated Use {@link #elemIncrDecr(Object, Object, Context, Scriptable, int)} instead
*/
@Deprecated
public static Object elemIncrDecr(Object obj, Object index,
Context cx, int incrDecrMask)
{
return elemIncrDecr(obj, index, cx, getTopCallScope(cx), incrDecrMask);
}
public static Object elemIncrDecr(Object obj, Object index,
Context cx, Scriptable scope,
int incrDecrMask)
{
Object value = getObjectElem(obj, index, cx, scope);
boolean post = ((incrDecrMask & Node.POST_FLAG) != 0);
double number;
if (value instanceof Number) {
number = ((Number)value).doubleValue();
} else {
number = toNumber(value);
if (post) {
// convert result to number
value = wrapNumber(number);
}
}
if ((incrDecrMask & Node.DECR_FLAG) == 0) {
++number;
} else {
--number;
}
Number result = wrapNumber(number);
setObjectElem(obj, index, result, cx, scope);
if (post) {
return value;
}
return result;
}
/**
* @deprecated Use {@link #refIncrDecr(Ref, Context, Scriptable, int)} instead
*/
@Deprecated
public static Object refIncrDecr(Ref ref, Context cx, int incrDecrMask)
{
return refIncrDecr(ref, cx, getTopCallScope(cx), incrDecrMask);
}
public static Object refIncrDecr(Ref ref, Context cx, Scriptable scope,
int incrDecrMask)
{
Object value = ref.get(cx);
boolean post = ((incrDecrMask & Node.POST_FLAG) != 0);
double number;
if (value instanceof Number) {
number = ((Number)value).doubleValue();
} else {
number = toNumber(value);
if (post) {
// convert result to number
value = wrapNumber(number);
}
}
if ((incrDecrMask & Node.DECR_FLAG) == 0) {
++number;
} else {
--number;
}
Number result = wrapNumber(number);
ref.set(cx, scope, result);
if (post) {
return value;
}
return result;
}
public static Object toPrimitive(Object val) {
return toPrimitive(val, null);
}
public static Object toPrimitive(Object val, Class typeHint)
{
if (!(val instanceof Scriptable)) {
return val;
}
Scriptable s = (Scriptable)val;
Object result = s.getDefaultValue(typeHint);
if ((result instanceof Scriptable) && !isSymbol(result))
throw typeError0("msg.bad.default.value");
return result;
}
/**
* Equality
*
* See ECMA 11.9
*/
public static boolean eq(Object x, Object y)
{
if (x == null || x == Undefined.instance) {
if (y == null || y == Undefined.instance) {
return true;
}
if (y instanceof ScriptableObject) {
Object test = ((ScriptableObject)y).equivalentValues(x);
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
return false;
} else if (x instanceof Number) {
return eqNumber(((Number)x).doubleValue(), y);
} else if (x == y) {
return true;
} else if (x instanceof CharSequence) {
return eqString((CharSequence)x, y);
} else if (x instanceof Boolean) {
boolean b = ((Boolean)x).booleanValue();
if (y instanceof Boolean) {
return b == ((Boolean)y).booleanValue();
}
if (y instanceof ScriptableObject) {
Object test = ((ScriptableObject)y).equivalentValues(x);
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
return eqNumber(b ? 1.0 : 0.0, y);
} else if (x instanceof Scriptable) {
if (y instanceof Scriptable) {
if (x instanceof ScriptableObject) {
Object test = ((ScriptableObject)x).equivalentValues(y);
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
if (y instanceof ScriptableObject) {
Object test = ((ScriptableObject)y).equivalentValues(x);
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
if (x instanceof Wrapper && y instanceof Wrapper) {
// See bug 413838. Effectively an extension to ECMA for
// the LiveConnect case.
Object unwrappedX = ((Wrapper)x).unwrap();
Object unwrappedY = ((Wrapper)y).unwrap();
return unwrappedX == unwrappedY ||
(isPrimitive(unwrappedX) &&
isPrimitive(unwrappedY) &&
eq(unwrappedX, unwrappedY));
}
return false;
} else if (y instanceof Boolean) {
if (x instanceof ScriptableObject) {
Object test = ((ScriptableObject)x).equivalentValues(y);
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
double d = ((Boolean)y).booleanValue() ? 1.0 : 0.0;
return eqNumber(d, x);
} else if (y instanceof Number) {
return eqNumber(((Number)y).doubleValue(), x);
} else if (y instanceof CharSequence) {
return eqString((CharSequence)y, x);
}
// covers the case when y == Undefined.instance as well
return false;
} else {
warnAboutNonJSObject(x);
return x == y;
}
}
/*
* Implement "SameValue" as in ECMA 7.2.9. This is not the same as "eq" because it handles
* signed zeroes and NaNs differently.
*/
public static boolean same(Object x, Object y) {
if (!typeof(x).equals(typeof(y))) {
return false;
}
if (x instanceof Number) {
if (isNaN(x) && isNaN(y)) {
return true;
}
return x.equals(y);
}
return eq(x, y);
}
/**
* Implement "SameValueZero" from ECMA 7.2.9
*/
public static boolean sameZero(Object x, Object y) {
if (!typeof(x).equals(typeof(y))) {
return false;
}
if (x instanceof Number) {
if (isNaN(x) && isNaN(y)) {
return true;
}
final double dx = ((Number)x).doubleValue();
if (y instanceof Number) {
final double dy = ((Number)y).doubleValue();
if (((dx == negativeZero) && (dy == 0.0)) ||
((dx == 0.0) && dy == negativeZero)) {
return true;
}
}
return eqNumber(dx, y);
}
return eq(x, y);
}
public static boolean isNaN(Object n) {
if (n instanceof Double) {
return Double.isNaN((Double)n);
}
if (n instanceof Float) {
return Float.isNaN((Float)n);
}
return false;
}
public static boolean isPrimitive(Object obj) {
return obj == null || obj == Undefined.instance ||
(obj instanceof Number) || (obj instanceof String) ||
(obj instanceof Boolean);
}
static boolean eqNumber(double x, Object y)
{
for (;;) {
if (y == null || y == Undefined.instance) {
return false;
} else if (y instanceof Number) {
return x == ((Number)y).doubleValue();
} else if (y instanceof CharSequence) {
return x == toNumber(y);
} else if (y instanceof Boolean) {
return x == (((Boolean) y).booleanValue() ? 1.0 : +0.0);
} else if (isSymbol(y)) {
return false;
} else if (y instanceof Scriptable) {
if (y instanceof ScriptableObject) {
Object xval = wrapNumber(x);
Object test = ((ScriptableObject)y).equivalentValues(xval);
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
y = toPrimitive(y);
} else {
warnAboutNonJSObject(y);
return false;
}
}
}
private static boolean eqString(CharSequence x, Object y)
{
for (;;) {
if (y == null || y == Undefined.instance) {
return false;
} else if (y instanceof CharSequence) {
CharSequence c = (CharSequence)y;
return x.length() == c.length() && x.toString().equals(c.toString());
} else if (y instanceof Number) {
return toNumber(x.toString()) == ((Number)y).doubleValue();
} else if (y instanceof Boolean) {
return toNumber(x.toString()) == (((Boolean) y).booleanValue() ? 1.0 : 0.0);
} else if (isSymbol(y)) {
return false;
} else if (y instanceof Scriptable) {
if (y instanceof ScriptableObject) {
Object test = ((ScriptableObject)y).equivalentValues(x.toString());
if (test != Scriptable.NOT_FOUND) {
return ((Boolean)test).booleanValue();
}
}
y = toPrimitive(y);
continue;
} else {
warnAboutNonJSObject(y);
return false;
}
}
}
public static boolean shallowEq(Object x, Object y)
{
if (x == y) {
if (!(x instanceof Number)) {
return true;
}
// NaN check
double d = ((Number)x).doubleValue();
return !Double.isNaN(d);
}
if (x == null || x == Undefined.instance || x == Undefined.SCRIPTABLE_UNDEFINED) {
if ((x == Undefined.instance && y == Undefined.SCRIPTABLE_UNDEFINED)
|| (x == Undefined.SCRIPTABLE_UNDEFINED && y == Undefined.instance)) return true;
return false;
} else if (x instanceof Number) {
if (y instanceof Number) {
return ((Number)x).doubleValue() == ((Number)y).doubleValue();
}
} else if (x instanceof CharSequence) {
if (y instanceof CharSequence) {
return x.toString().equals(y.toString());
}
} else if (x instanceof Boolean) {
if (y instanceof Boolean) {
return x.equals(y);
}
} else if (x instanceof Scriptable) {
if (x instanceof Wrapper && y instanceof Wrapper) {
return ((Wrapper)x).unwrap() == ((Wrapper)y).unwrap();
}
} else {
warnAboutNonJSObject(x);
return x == y;
}
return false;
}
/**
* The instanceof operator.
*
* @return a instanceof b
*/
public static boolean instanceOf(Object a, Object b, Context cx)
{
// Check RHS is an object
if (! (b instanceof Scriptable)) {
throw typeError0("msg.instanceof.not.object");
}
// for primitive values on LHS, return false
if (! (a instanceof Scriptable))
return false;
return ((Scriptable)b).hasInstance((Scriptable)a);
}
/**
* Delegates to
*
* @return true iff rhs appears in lhs' proto chain
*/
public static boolean jsDelegatesTo(Scriptable lhs, Scriptable rhs) {
Scriptable proto = lhs.getPrototype();
while (proto != null) {
if (proto.equals(rhs)) return true;
proto = proto.getPrototype();
}
return false;
}
/**
* The in operator.
*
* This is a new JS 1.3 language feature. The in operator mirrors
* the operation of the for .. in construct, and tests whether the
* rhs has the property given by the lhs. It is different from the
* for .. in construct in that:
*
- it doesn't perform ToObject on the right hand side
*
- it returns true for DontEnum properties.
* @param a the left hand operand
* @param b the right hand operand
*
* @return true if property name or element number a is a property of b
*/
public static boolean in(Object a, Object b, Context cx)
{
if (!(b instanceof Scriptable)) {
throw typeError0("msg.in.not.object");
}
return hasObjectElem((Scriptable)b, a, cx);
}
public static boolean cmp_LT(Object val1, Object val2)
{
double d1, d2;
if (val1 instanceof Number && val2 instanceof Number) {
d1 = ((Number)val1).doubleValue();
d2 = ((Number)val2).doubleValue();
} else {
if ((val1 instanceof Symbol) || (val2 instanceof Symbol)) {
throw typeError0("msg.compare.symbol");
}
if (val1 instanceof Scriptable)
val1 = ((Scriptable) val1).getDefaultValue(NumberClass);
if (val2 instanceof Scriptable)
val2 = ((Scriptable) val2).getDefaultValue(NumberClass);
if (val1 instanceof CharSequence && val2 instanceof CharSequence) {
return val1.toString().compareTo(val2.toString()) < 0;
}
d1 = toNumber(val1);
d2 = toNumber(val2);
}
return d1 < d2;
}
public static boolean cmp_LE(Object val1, Object val2)
{
double d1, d2;
if (val1 instanceof Number && val2 instanceof Number) {
d1 = ((Number)val1).doubleValue();
d2 = ((Number)val2).doubleValue();
} else {
if ((val1 instanceof Symbol) || (val2 instanceof Symbol)) {
throw typeError0("msg.compare.symbol");
}
if (val1 instanceof Scriptable)
val1 = ((Scriptable) val1).getDefaultValue(NumberClass);
if (val2 instanceof Scriptable)
val2 = ((Scriptable) val2).getDefaultValue(NumberClass);
if (val1 instanceof CharSequence && val2 instanceof CharSequence) {
return val1.toString().compareTo(val2.toString()) <= 0;
}
d1 = toNumber(val1);
d2 = toNumber(val2);
}
return d1 <= d2;
}
// ------------------
// Statements
// ------------------
public static ScriptableObject getGlobal(Context cx) {
final String GLOBAL_CLASS = "org.mozilla.javascript.tools.shell.Global";
Class globalClass = Kit.classOrNull(GLOBAL_CLASS);
if (globalClass != null) {
try {
Class[] parm = { ScriptRuntime.ContextClass };
Constructor globalClassCtor = globalClass.getConstructor(parm);
Object[] arg = { cx };
return (ScriptableObject) globalClassCtor.newInstance(arg);
}
catch (RuntimeException e) {
throw e;
}
catch (Exception e) {
// fall through...
}
}
return new ImporterTopLevel(cx);
}
public static boolean hasTopCall(Context cx)
{
return (cx.topCallScope != null);
}
public static Scriptable getTopCallScope(Context cx)
{
Scriptable scope = cx.topCallScope;
if (scope == null) {
throw new IllegalStateException();
}
return scope;
}
/**
* @deprecated Use {@link #doTopCall(Callable, Context, Scriptable, Scriptable, Object[], boolean)} instead
*/
@Deprecated
public static Object doTopCall(Callable callable,
Context cx, Scriptable scope,
Scriptable thisObj, Object[] args)
{
return doTopCall(callable, cx, scope, thisObj, args, cx.isTopLevelStrict);
}
public static Object doTopCall(Callable callable,
Context cx, Scriptable scope,
Scriptable thisObj, Object[] args, boolean isTopLevelStrict)
{
if (scope == null)
throw new IllegalArgumentException();
if (cx.topCallScope != null) throw new IllegalStateException();
Object result;
cx.topCallScope = ScriptableObject.getTopLevelScope(scope);
cx.useDynamicScope = cx.hasFeature(Context.FEATURE_DYNAMIC_SCOPE);
boolean previousTopLevelStrict = cx.isTopLevelStrict;
cx.isTopLevelStrict = isTopLevelStrict;
ContextFactory f = cx.getFactory();
try {
result = f.doTopCall(callable, cx, scope, thisObj, args);
} finally {
cx.topCallScope = null;
// Cleanup cached references
cx.cachedXMLLib = null;
cx.isTopLevelStrict = previousTopLevelStrict;
if (cx.currentActivationCall != null) {
// Function should always call exitActivationFunction
// if it creates activation record
throw new IllegalStateException();
}
}
return result;
}
/**
* Return possibleDynamicScope if staticTopScope
* is present on its prototype chain and return staticTopScope
* otherwise.
* Should only be called when staticTopScope is top scope.
*/
static Scriptable checkDynamicScope(Scriptable possibleDynamicScope,
Scriptable staticTopScope)
{
// Return cx.topCallScope if scope
if (possibleDynamicScope == staticTopScope) {
return possibleDynamicScope;
}
Scriptable proto = possibleDynamicScope;
for (;;) {
proto = proto.getPrototype();
if (proto == staticTopScope) {
return possibleDynamicScope;
}
if (proto == null) {
return staticTopScope;
}
}
}
public static void addInstructionCount(Context cx, int instructionsToAdd)
{
cx.instructionCount += instructionsToAdd;
if (cx.instructionCount > cx.instructionThreshold)
{
cx.observeInstructionCount(cx.instructionCount);
cx.instructionCount = 0;
}
}
public static void initScript(NativeFunction funObj, Scriptable thisObj,
Context cx, Scriptable scope,
boolean evalScript)
{
if (cx.topCallScope == null)
throw new IllegalStateException();
int varCount = funObj.getParamAndVarCount();
if (varCount != 0) {
Scriptable varScope = scope;
// Never define any variables from var statements inside with
// object. See bug 38590.
while (varScope instanceof NativeWith) {
varScope = varScope.getParentScope();
}
for (int i = varCount; i-- != 0;) {
String name = funObj.getParamOrVarName(i);
boolean isConst = funObj.getParamOrVarConst(i);
// Don't overwrite existing def if already defined in object
// or prototypes of object.
if (!ScriptableObject.hasProperty(scope, name)) {
if (isConst) {
ScriptableObject.defineConstProperty(varScope, name);
} else if (!evalScript) {
if (!(funObj instanceof InterpretedFunction)
|| ((InterpretedFunction) funObj).hasFunctionNamed(name)) {
// Global var definitions are supposed to be DONTDELETE
ScriptableObject.defineProperty(varScope, name, Undefined.instance, ScriptableObject.PERMANENT);
}
} else {
varScope.put(name, varScope, Undefined.instance);
}
} else {
ScriptableObject.redefineProperty(scope, name, isConst);
}
}
}
}
/**
* @deprecated Use {@link #createFunctionActivation(NativeFunction, Scriptable, Object[], boolean)} instead
*/
@Deprecated
public static Scriptable createFunctionActivation(NativeFunction funObj,
Scriptable scope,
Object[] args)
{
return createFunctionActivation(funObj, scope, args, false);
}
public static Scriptable createFunctionActivation(NativeFunction funObj,
Scriptable scope,
Object[] args,
boolean isStrict)
{
return new NativeCall(funObj, scope, args, false, isStrict);
}
public static Scriptable createArrowFunctionActivation(NativeFunction funObj,
Scriptable scope,
Object[] args,
boolean isStrict)
{
return new NativeCall(funObj, scope, args, true, isStrict);
}
public static void enterActivationFunction(Context cx,
Scriptable scope)
{
if (cx.topCallScope == null)
throw new IllegalStateException();
NativeCall call = (NativeCall)scope;
call.parentActivationCall = cx.currentActivationCall;
cx.currentActivationCall = call;
call.defineAttributesForArguments();
}
public static void exitActivationFunction(Context cx)
{
NativeCall call = cx.currentActivationCall;
cx.currentActivationCall = call.parentActivationCall;
call.parentActivationCall = null;
}
static NativeCall findFunctionActivation(Context cx, Function f)
{
NativeCall call = cx.currentActivationCall;
while (call != null) {
if (call.function == f)
return call;
call = call.parentActivationCall;
}
return null;
}
public static Scriptable newCatchScope(Throwable t,
Scriptable lastCatchScope,
String exceptionName,
Context cx, Scriptable scope)
{
Object obj;
boolean cacheObj;
getObj:
if (t instanceof JavaScriptException) {
cacheObj = false;
obj = ((JavaScriptException)t).getValue();
} else {
cacheObj = true;
// Create wrapper object unless it was associated with
// the previous scope object
if (lastCatchScope != null) {
NativeObject last = (NativeObject)lastCatchScope;
obj = last.getAssociatedValue(t);
if (obj == null) Kit.codeBug();
break getObj;
}
RhinoException re;
TopLevel.NativeErrors type;
String errorMsg;
Throwable javaException = null;
if (t instanceof EcmaError) {
EcmaError ee = (EcmaError)t;
re = ee;
type = TopLevel.NativeErrors.valueOf(ee.getName());
errorMsg = ee.getErrorMessage();
} else if (t instanceof WrappedException) {
WrappedException we = (WrappedException)t;
re = we;
javaException = we.getWrappedException();
type = TopLevel.NativeErrors.JavaException;
errorMsg = javaException.getClass().getName()
+": "+javaException.getMessage();
} else if (t instanceof EvaluatorException) {
// Pure evaluator exception, nor WrappedException instance
EvaluatorException ee = (EvaluatorException)t;
re = ee;
type = TopLevel.NativeErrors.InternalError;
errorMsg = ee.getMessage();
} else if (cx.hasFeature(Context.FEATURE_ENHANCED_JAVA_ACCESS)) {
// With FEATURE_ENHANCED_JAVA_ACCESS, scripts can catch
// all exception types
re = new WrappedException(t);
type = TopLevel.NativeErrors.JavaException;
errorMsg = t.toString();
} else {
// Script can catch only instances of JavaScriptException,
// EcmaError and EvaluatorException
throw Kit.codeBug();
}
String sourceUri = re.sourceName();
if (sourceUri == null) {
sourceUri = "";
}
int line = re.lineNumber();
Object args[];
if (line > 0) {
args = new Object[] { errorMsg, sourceUri, Integer.valueOf(line) };
} else {
args = new Object[] { errorMsg, sourceUri };
}
Scriptable errorObject = newNativeError(cx, scope, type, args);
// set exception in Error objects to enable non-ECMA "stack" property
if (errorObject instanceof NativeError) {
((NativeError) errorObject).setStackProvider(re);
}
if (javaException != null && isVisible(cx, javaException)) {
Object wrap = cx.getWrapFactory().wrap(cx, scope, javaException,
null);
ScriptableObject.defineProperty(
errorObject, "javaException", wrap,
ScriptableObject.PERMANENT | ScriptableObject.READONLY | ScriptableObject.DONTENUM);
}
if (isVisible(cx, re)) {
Object wrap = cx.getWrapFactory().wrap(cx, scope, re, null);
ScriptableObject.defineProperty(
errorObject, "rhinoException", wrap,
ScriptableObject.PERMANENT | ScriptableObject.READONLY | ScriptableObject.DONTENUM);
}
obj = errorObject;
}
NativeObject catchScopeObject = new NativeObject();
// See ECMA 12.4
catchScopeObject.defineProperty(
exceptionName, obj, ScriptableObject.PERMANENT);
if (isVisible(cx, t)) {
// Add special Rhino object __exception__ defined in the catch
// scope that can be used to retrieve the Java exception associated
// with the JavaScript exception (to get stack trace info, etc.)
catchScopeObject.defineProperty(
"__exception__", Context.javaToJS(t, scope),
ScriptableObject.PERMANENT|ScriptableObject.DONTENUM);
}
if (cacheObj) {
catchScopeObject.associateValue(t, obj);
}
return catchScopeObject;
}
public static Scriptable wrapException(Throwable t,
Scriptable scope,
Context cx) {
RhinoException re;
String errorName;
String errorMsg;
Throwable javaException = null;
if (t instanceof EcmaError) {
EcmaError ee = (EcmaError)t;
re = ee;
errorName = ee.getName();
errorMsg = ee.getErrorMessage();
} else if (t instanceof WrappedException) {
WrappedException we = (WrappedException)t;
re = we;
javaException = we.getWrappedException();
errorName = "JavaException";
errorMsg = javaException.getClass().getName()
+": "+javaException.getMessage();
} else if (t instanceof EvaluatorException) {
// Pure evaluator exception, nor WrappedException instance
EvaluatorException ee = (EvaluatorException)t;
re = ee;
errorName = "InternalError";
errorMsg = ee.getMessage();
} else if (cx.hasFeature(Context.FEATURE_ENHANCED_JAVA_ACCESS)) {
// With FEATURE_ENHANCED_JAVA_ACCESS, scripts can catch
// all exception types
re = new WrappedException(t);
errorName = "JavaException";
errorMsg = t.toString();
} else {
// Script can catch only instances of JavaScriptException,
// EcmaError and EvaluatorException
throw Kit.codeBug();
}
String sourceUri = re.sourceName();
if (sourceUri == null) {
sourceUri = "";
}
int line = re.lineNumber();
Object args[];
if (line > 0) {
args = new Object[] { errorMsg, sourceUri, Integer.valueOf(line) };
} else {
args = new Object[] { errorMsg, sourceUri };
}
Scriptable errorObject = cx.newObject(scope, errorName, args);
ScriptableObject.putProperty(errorObject, "name", errorName);
// set exception in Error objects to enable non-ECMA "stack" property
if (errorObject instanceof NativeError) {
((NativeError) errorObject).setStackProvider(re);
}
if (javaException != null && isVisible(cx, javaException)) {
Object wrap = cx.getWrapFactory().wrap(cx, scope, javaException,
null);
ScriptableObject.defineProperty(
errorObject, "javaException", wrap,
ScriptableObject.PERMANENT | ScriptableObject.READONLY | ScriptableObject.DONTENUM);
}
if (isVisible(cx, re)) {
Object wrap = cx.getWrapFactory().wrap(cx, scope, re, null);
ScriptableObject.defineProperty(
errorObject, "rhinoException", wrap,
ScriptableObject.PERMANENT | ScriptableObject.READONLY | ScriptableObject.DONTENUM);
}
return errorObject;
}
private static boolean isVisible(Context cx, Object obj) {
ClassShutter shutter = cx.getClassShutter();
return shutter == null ||
shutter.visibleToScripts(obj.getClass().getName());
}
public static Scriptable enterWith(Object obj, Context cx,
Scriptable scope)
{
Scriptable sobj = toObjectOrNull(cx, obj, scope);
if (sobj == null) {
throw typeError1("msg.undef.with", toString(obj));
}
if (sobj instanceof XMLObject) {
XMLObject xmlObject = (XMLObject)sobj;
return xmlObject.enterWith(scope);
}
return new NativeWith(scope, sobj);
}
public static Scriptable leaveWith(Scriptable scope)
{
NativeWith nw = (NativeWith)scope;
return nw.getParentScope();
}
public static Scriptable enterDotQuery(Object value, Scriptable scope)
{
if (!(value instanceof XMLObject)) {
throw notXmlError(value);
}
XMLObject object = (XMLObject)value;
return object.enterDotQuery(scope);
}
public static Object updateDotQuery(boolean value, Scriptable scope)
{
// Return null to continue looping
NativeWith nw = (NativeWith)scope;
return nw.updateDotQuery(value);
}
public static Scriptable leaveDotQuery(Scriptable scope)
{
NativeWith nw = (NativeWith)scope;
return nw.getParentScope();
}
public static void setFunctionProtoAndParent(BaseFunction fn,
Scriptable scope)
{
fn.setParentScope(scope);
fn.setPrototype(ScriptableObject.getFunctionPrototype(scope));
}
public static void setObjectProtoAndParent(ScriptableObject object,
Scriptable scope)
{
// Compared with function it always sets the scope to top scope
scope = ScriptableObject.getTopLevelScope(scope);
object.setParentScope(scope);
Scriptable proto
= ScriptableObject.getClassPrototype(scope, object.getClassName());
object.setPrototype(proto);
}
public static void setBuiltinProtoAndParent(ScriptableObject object,
Scriptable scope,
TopLevel.Builtins type)
{
scope = ScriptableObject.getTopLevelScope(scope);
object.setParentScope(scope);
object.setPrototype(TopLevel.getBuiltinPrototype(scope, type));
}
public static void initFunction(Context cx, Scriptable scope,
NativeFunction function, int type,
boolean fromEvalCode)
{
if (type == FunctionNode.FUNCTION_STATEMENT) {
String name = function.getFunctionName();
if (name != null && name.length() != 0) {
if (!fromEvalCode) {
// ECMA specifies that functions defined in global and
// function scope outside eval should have DONTDELETE set.
ScriptableObject.defineProperty
(scope, name, function, ScriptableObject.PERMANENT);
} else {
scope.put(name, scope, function);
}
}
} else if (type == FunctionNode.FUNCTION_EXPRESSION_STATEMENT) {
String name = function.getFunctionName();
if (name != null && name.length() != 0) {
// Always put function expression statements into initial
// activation object ignoring the with statement to follow
// SpiderMonkey
while (scope instanceof NativeWith) {
scope = scope.getParentScope();
}
scope.put(name, scope, function);
}
} else {
throw Kit.codeBug();
}
}
public static Scriptable newArrayLiteral(Object[] objects,
int[] skipIndices,
Context cx, Scriptable scope)
{
final int SKIP_DENSITY = 2;
int count = objects.length;
int skipCount = 0;
if (skipIndices != null) {
skipCount = skipIndices.length;
}
int length = count + skipCount;
if (length > 1 && skipCount * SKIP_DENSITY < length) {
// If not too sparse, create whole array for constructor
Object[] sparse;
if (skipCount == 0) {
sparse = objects;
} else {
sparse = new Object[length];
int skip = 0;
for (int i = 0, j = 0; i != length; ++i) {
if (skip != skipCount && skipIndices[skip] == i) {
sparse[i] = Scriptable.NOT_FOUND;
++skip;
continue;
}
sparse[i] = objects[j];
++j;
}
}
return cx.newArray(scope, sparse);
}
Scriptable array = cx.newArray(scope, length);
int skip = 0;
for (int i = 0, j = 0; i != length; ++i) {
if (skip != skipCount && skipIndices[skip] == i) {
++skip;
continue;
}
array.put(i, array, objects[j]);
++j;
}
return array;
}
/**
* This method is here for backward compat with existing compiled code. It
* is called when an object literal is compiled. The next instance will be
* the version called from new code.
* This method only present for compatibility.
* @deprecated Use {@link #newObjectLiteral(Object[], Object[], int[], Context, Scriptable)} instead
*/
@Deprecated
public static Scriptable newObjectLiteral(Object[] propertyIds,
Object[] propertyValues,
Context cx, Scriptable scope)
{
// Passing null for getterSetters means no getters or setters
return newObjectLiteral(propertyIds, propertyValues, null, cx, scope);
}
public static Scriptable newObjectLiteral(Object[] propertyIds,
Object[] propertyValues,
int [] getterSetters,
Context cx, Scriptable scope)
{
Scriptable object = cx.newObject(scope);
for (int i = 0, end = propertyIds.length; i != end; ++i) {
Object id = propertyIds[i];
int getterSetter = getterSetters == null ? 0 : getterSetters[i];
Object value = propertyValues[i];
if (id instanceof String) {
if (getterSetter == 0) {
if (isSpecialProperty((String)id)) {
Ref ref = specialRef(object, (String)id, cx, scope);
ref.set(cx, scope, value);
} else {
object.put((String)id, object, value);
}
} else {
ScriptableObject so = (ScriptableObject)object;
Callable getterOrSetter = (Callable)value;
boolean isSetter = getterSetter == 1;
so.setGetterOrSetter((String)id, 0, getterOrSetter, isSetter);
}
} else {
int index = ((Integer)id).intValue();
object.put(index, object, value);
}
}
return object;
}
public static boolean isArrayObject(Object obj)
{
return obj instanceof NativeArray || obj instanceof Arguments;
}
public static Object[] getArrayElements(Scriptable object)
{
Context cx = Context.getContext();
long longLen = NativeArray.getLengthProperty(cx, object, false);
if (longLen > Integer.MAX_VALUE) {
// arrays beyond MAX_INT is not in Java in any case
throw new IllegalArgumentException();
}
int len = (int) longLen;
if (len == 0) {
return ScriptRuntime.emptyArgs;
}
Object[] result = new Object[len];
for (int i=0; i < len; i++) {
Object elem = ScriptableObject.getProperty(object, i);
result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
: elem;
}
return result;
}
static void checkDeprecated(Context cx, String name) {
int version = cx.getLanguageVersion();
if (version >= Context.VERSION_1_4 || version == Context.VERSION_DEFAULT) {
String msg = getMessage1("msg.deprec.ctor", name);
if (version == Context.VERSION_DEFAULT)
Context.reportWarning(msg);
else
throw Context.reportRuntimeError(msg);
}
}
public static String getMessage0(String messageId)
{
return getMessage(messageId, null);
}
public static String getMessage1(String messageId, Object arg1)
{
Object[] arguments = {arg1};
return getMessage(messageId, arguments);
}
public static String getMessage2(
String messageId, Object arg1, Object arg2)
{
Object[] arguments = {arg1, arg2};
return getMessage(messageId, arguments);
}
public static String getMessage3(
String messageId, Object arg1, Object arg2, Object arg3)
{
Object[] arguments = {arg1, arg2, arg3};
return getMessage(messageId, arguments);
}
public static String getMessage4(
String messageId, Object arg1, Object arg2, Object arg3, Object arg4)
{
Object[] arguments = {arg1, arg2, arg3, arg4};
return getMessage(messageId, arguments);
}
/**
* This is an interface defining a message provider. Create your
* own implementation to override the default error message provider.
*
* @author Mike Harm
*/
public interface MessageProvider {
/**
* Returns a textual message identified by the given messageId,
* parameterized by the given arguments.
*
* @param messageId the identifier of the message
* @param arguments the arguments to fill into the message
*/
String getMessage(String messageId, Object[] arguments);
}
public static final MessageProvider messageProvider = new DefaultMessageProvider();
public static String getMessage(String messageId, Object[] arguments)
{
return messageProvider.getMessage(messageId, arguments);
}
/* OPT there's a noticable delay for the first error! Maybe it'd
* make sense to use a ListResourceBundle instead of a properties
* file to avoid (synchronized) text parsing.
*/
private static class DefaultMessageProvider implements MessageProvider {
@Override
public String getMessage(String messageId, Object[] arguments) {
final String defaultResource
= "org.mozilla.javascript.resources.Messages";
Context cx = Context.getCurrentContext();
Locale locale = cx != null ? cx.getLocale() : Locale.getDefault();
// ResourceBundle does caching.
ResourceBundle rb = ResourceBundle.getBundle(defaultResource, locale);
String formatString;
try {
formatString = rb.getString(messageId);
} catch (java.util.MissingResourceException mre) {
throw new RuntimeException
("no message resource found for message property "+ messageId);
}
/*
* It's OK to format the string, even if 'arguments' is null;
* we need to format it anyway, to make double ''s collapse to
* single 's.
*/
MessageFormat formatter = new MessageFormat(formatString);
return formatter.format(arguments);
}
}
public static EcmaError constructError(String error, String message)
{
int[] linep = new int[1];
String filename = Context.getSourcePositionFromStack(linep);
return constructError(error, message, filename, linep[0], null, 0);
}
public static EcmaError constructError(String error,
String message,
int lineNumberDelta)
{
int[] linep = new int[1];
String filename = Context.getSourcePositionFromStack(linep);
if (linep[0] != 0) {
linep[0] += lineNumberDelta;
}
return constructError(error, message, filename, linep[0], null, 0);
}
public static EcmaError constructError(String error,
String message,
String sourceName,
int lineNumber,
String lineSource,
int columnNumber)
{
return new EcmaError(error, message, sourceName,
lineNumber, lineSource, columnNumber);
}
public static EcmaError rangeError(String message)
{
return constructError("RangeError", message);
}
public static EcmaError typeError(String message)
{
return constructError("TypeError", message);
}
public static EcmaError typeError0(String messageId)
{
String msg = getMessage0(messageId);
return typeError(msg);
}
public static EcmaError typeError1(String messageId, Object arg1)
{
String msg = getMessage1(messageId, arg1);
return typeError(msg);
}
public static EcmaError typeError2(String messageId, Object arg1,
Object arg2)
{
String msg = getMessage2(messageId, arg1, arg2);
return typeError(msg);
}
public static EcmaError typeError3(String messageId, String arg1,
String arg2, String arg3)
{
String msg = getMessage3(messageId, arg1, arg2, arg3);
return typeError(msg);
}
public static RuntimeException undefReadError(Object object, Object id)
{
return typeError2("msg.undef.prop.read", toString(object), toString(id));
}
public static RuntimeException undefCallError(Object object, Object id)
{
return typeError2("msg.undef.method.call", toString(object), toString(id));
}
public static RuntimeException undefWriteError(Object object,
Object id,
Object value)
{
return typeError3("msg.undef.prop.write", toString(object), toString(id),
toString(value));
}
private static RuntimeException undefDeleteError(Object object, Object id)
{
throw typeError2("msg.undef.prop.delete", toString(object), toString(id));
}
public static RuntimeException notFoundError(Scriptable object,
String property)
{
// XXX: use object to improve the error message
String msg = getMessage1("msg.is.not.defined", property);
throw constructError("ReferenceError", msg);
}
public static RuntimeException notFunctionError(Object value)
{
return notFunctionError(value, value);
}
public static RuntimeException notFunctionError(Object value,
Object messageHelper)
{
// Use value for better error reporting
String msg = (messageHelper == null)
? "null" : messageHelper.toString();
if (value == Scriptable.NOT_FOUND) {
return typeError1("msg.function.not.found", msg);
}
return typeError2("msg.isnt.function", msg, typeof(value));
}
public static RuntimeException notFunctionError(Object obj, Object value,
String propertyName)
{
// Use obj and value for better error reporting
String objString = toString(obj);
if (obj instanceof NativeFunction) {
// Omit function body in string representations of functions
int paren = objString.indexOf(')');
int curly = objString.indexOf('{', paren);
if (curly > -1) {
objString = objString.substring(0, curly + 1) + "...}";
}
}
if (value == Scriptable.NOT_FOUND) {
return typeError2("msg.function.not.found.in", propertyName,
objString);
}
return typeError3("msg.isnt.function.in", propertyName, objString,
typeof(value));
}
private static RuntimeException notXmlError(Object value)
{
throw typeError1("msg.isnt.xml.object", toString(value));
}
private static void warnAboutNonJSObject(Object nonJSObject)
{
final String omitParam = ScriptRuntime.getMessage0("params.omit.non.js.object.warning");
if (!"true".equals(omitParam)) {
String message = ScriptRuntime.getMessage2("msg.non.js.object.warning",nonJSObject,nonJSObject.getClass().getName());
Context.reportWarning(message);
// Just to be sure that it would be noticed
System.err.println(message);
}
}
public static RegExpProxy getRegExpProxy(Context cx)
{
return cx.getRegExpProxy();
}
public static void setRegExpProxy(Context cx, RegExpProxy proxy)
{
if (proxy == null) throw new IllegalArgumentException();
cx.regExpProxy = proxy;
}
public static RegExpProxy checkRegExpProxy(Context cx)
{
RegExpProxy result = getRegExpProxy(cx);
if (result == null) {
throw Context.reportRuntimeError0("msg.no.regexp");
}
return result;
}
public static Scriptable wrapRegExp(Context cx, Scriptable scope,
Object compiled) {
return cx.getRegExpProxy().wrapRegExp(cx, scope, compiled);
}
private static XMLLib currentXMLLib(Context cx)
{
// Scripts should be running to access this
if (cx.topCallScope == null)
throw new IllegalStateException();
XMLLib xmlLib = cx.cachedXMLLib;
if (xmlLib == null) {
xmlLib = XMLLib.extractFromScope(cx.topCallScope);
if (xmlLib == null)
throw new IllegalStateException();
cx.cachedXMLLib = xmlLib;
}
return xmlLib;
}
/**
* Escapes the reserved characters in a value of an attribute
*
* @param value Unescaped text
* @return The escaped text
*/
public static String escapeAttributeValue(Object value, Context cx)
{
XMLLib xmlLib = currentXMLLib(cx);
return xmlLib.escapeAttributeValue(value);
}
/**
* Escapes the reserved characters in a value of a text node
*
* @param value Unescaped text
* @return The escaped text
*/
public static String escapeTextValue(Object value, Context cx)
{
XMLLib xmlLib = currentXMLLib(cx);
return xmlLib.escapeTextValue(value);
}
public static Ref memberRef(Object obj, Object elem,
Context cx, int memberTypeFlags)
{
if (!(obj instanceof XMLObject)) {
throw notXmlError(obj);
}
XMLObject xmlObject = (XMLObject)obj;
return xmlObject.memberRef(cx, elem, memberTypeFlags);
}
public static Ref memberRef(Object obj, Object namespace, Object elem,
Context cx, int memberTypeFlags)
{
if (!(obj instanceof XMLObject)) {
throw notXmlError(obj);
}
XMLObject xmlObject = (XMLObject)obj;
return xmlObject.memberRef(cx, namespace, elem, memberTypeFlags);
}
public static Ref nameRef(Object name, Context cx,
Scriptable scope, int memberTypeFlags)
{
XMLLib xmlLib = currentXMLLib(cx);
return xmlLib.nameRef(cx, name, scope, memberTypeFlags);
}
public static Ref nameRef(Object namespace, Object name, Context cx,
Scriptable scope, int memberTypeFlags)
{
XMLLib xmlLib = currentXMLLib(cx);
return xmlLib.nameRef(cx, namespace, name, scope, memberTypeFlags);
}
private static void storeIndexResult(Context cx, int index)
{
cx.scratchIndex = index;
}
static int lastIndexResult(Context cx)
{
return cx.scratchIndex;
}
public static void storeUint32Result(Context cx, long value)
{
if ((value >>> 32) != 0)
throw new IllegalArgumentException();
cx.scratchUint32 = value;
}
public static long lastUint32Result(Context cx)
{
long value = cx.scratchUint32;
if ((value >>> 32) != 0)
throw new IllegalStateException();
return value;
}
private static void storeScriptable(Context cx, Scriptable value)
{
// The previously stored scratchScriptable should be consumed
if (cx.scratchScriptable != null)
throw new IllegalStateException();
cx.scratchScriptable = value;
}
public static Scriptable lastStoredScriptable(Context cx)
{
Scriptable result = cx.scratchScriptable;
cx.scratchScriptable = null;
return result;
}
static String makeUrlForGeneratedScript
(boolean isEval, String masterScriptUrl, int masterScriptLine)
{
if (isEval) {
return masterScriptUrl+'#'+masterScriptLine+"(eval)";
}
return masterScriptUrl+'#'+masterScriptLine+"(Function)";
}
static boolean isGeneratedScript(String sourceUrl) {
// ALERT: this may clash with a valid URL containing (eval) or
// (Function)
return sourceUrl.indexOf("(eval)") >= 0
|| sourceUrl.indexOf("(Function)") >= 0;
}
/**
* Not all "NativeSymbol" instances are actually symbols. So account for that here rather than just
* by using an "instanceof" check.
*/
static boolean isSymbol(Object obj) {
return (((obj instanceof NativeSymbol) &&
((NativeSymbol)obj).isSymbol())) || (obj instanceof SymbolKey);
}
private static RuntimeException errorWithClassName(String msg, Object val)
{
return Context.reportRuntimeError1(msg, val.getClass().getName());
}
/**
* Equivalent to executing "new Error(message, sourceFileName, sourceLineNo)" from JavaScript.
* @param cx the current context
* @param scope the current scope
* @param message the message
* @return a JavaScriptException you should throw
*/
public static JavaScriptException throwError(Context cx, Scriptable scope,
String message) {
int[] linep = { 0 };
String filename = Context.getSourcePositionFromStack(linep);
final Scriptable error = newBuiltinObject(cx, scope,
TopLevel.Builtins.Error, new Object[] { message, filename, Integer.valueOf(linep[0]) });
return new JavaScriptException(error, filename, linep[0]);
}
/**
* Equivalent to executing "new $constructorName(message, sourceFileName, sourceLineNo)" from JavaScript.
* @param cx the current context
* @param scope the current scope
* @param message the message
* @return a JavaScriptException you should throw
*/
public static JavaScriptException throwCustomError(Context cx, Scriptable scope, String constructorName,
String message) {
int[] linep = { 0 };
String filename = Context.getSourcePositionFromStack(linep);
final Scriptable error = cx.newObject(scope, constructorName,
new Object[] { message, filename, Integer.valueOf(linep[0]) });
return new JavaScriptException(error, filename, linep[0]);
}
public static final Object[] emptyArgs = new Object[0];
public static final String[] emptyStrings = new String[0];
}
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