/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#import "APICast.h"
#import "APIShims.h"
#import "DateInstance.h"
#import "Error.h"
#import "JavaScriptCore.h"
#import "JSContextInternal.h"
#import "JSVirtualMachineInternal.h"
#import "JSValueInternal.h"
#import "JSWrapperMap.h"
#import "ObjcRuntimeExtras.h"
#import "Operations.h"
#import "JSCJSValue.h"
#import <wtf/HashMap.h>
#import <wtf/HashSet.h>
#import <wtf/Vector.h>
#import <wtf/TCSpinLock.h>
#import <wtf/text/WTFString.h>
#import <wtf/text/StringHash.h>
#if JSC_OBJC_API_ENABLED
NSString * const JSPropertyDescriptorWritableKey = @"writable";
NSString * const JSPropertyDescriptorEnumerableKey = @"enumerable";
NSString * const JSPropertyDescriptorConfigurableKey = @"configurable";
NSString * const JSPropertyDescriptorValueKey = @"value";
NSString * const JSPropertyDescriptorGetKey = @"get";
NSString * const JSPropertyDescriptorSetKey = @"set";
@implementation JSValue {
JSValueRef m_value;
}
- (JSValueRef)JSValueRef
{
return m_value;
}
+ (JSValue *)valueWithObject:(id)value inContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:objectToValue(context, value) inContext:context];
}
+ (JSValue *)valueWithBool:(BOOL)value inContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSValueMakeBoolean([context JSGlobalContextRef], value) inContext:context];
}
+ (JSValue *)valueWithDouble:(double)value inContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSValueMakeNumber([context JSGlobalContextRef], value) inContext:context];
}
+ (JSValue *)valueWithInt32:(int32_t)value inContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSValueMakeNumber([context JSGlobalContextRef], value) inContext:context];
}
+ (JSValue *)valueWithUInt32:(uint32_t)value inContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSValueMakeNumber([context JSGlobalContextRef], value) inContext:context];
}
+ (JSValue *)valueWithNewObjectInContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSObjectMake([context JSGlobalContextRef], 0, 0) inContext:context];
}
+ (JSValue *)valueWithNewArrayInContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSObjectMakeArray([context JSGlobalContextRef], 0, NULL, 0) inContext:context];
}
+ (JSValue *)valueWithNewRegularExpressionFromPattern:(NSString *)pattern flags:(NSString *)flags inContext:(JSContext *)context
{
JSStringRef patternString = JSStringCreateWithCFString((CFStringRef)pattern);
JSStringRef flagsString = JSStringCreateWithCFString((CFStringRef)flags);
JSValueRef arguments[2] = { JSValueMakeString([context JSGlobalContextRef], patternString), JSValueMakeString([context JSGlobalContextRef], flagsString) };
JSStringRelease(patternString);
JSStringRelease(flagsString);
return [JSValue valueWithJSValueRef:JSObjectMakeRegExp([context JSGlobalContextRef], 2, arguments, 0) inContext:context];
}
+ (JSValue *)valueWithNewErrorFromMessage:(NSString *)message inContext:(JSContext *)context
{
JSStringRef string = JSStringCreateWithCFString((CFStringRef)message);
JSValueRef argument = JSValueMakeString([context JSGlobalContextRef], string);
JSStringRelease(string);
return [JSValue valueWithJSValueRef:JSObjectMakeError([context JSGlobalContextRef], 1, &argument, 0) inContext:context];
}
+ (JSValue *)valueWithNullInContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSValueMakeNull([context JSGlobalContextRef]) inContext:context];
}
+ (JSValue *)valueWithUndefinedInContext:(JSContext *)context
{
return [JSValue valueWithJSValueRef:JSValueMakeUndefined([context JSGlobalContextRef]) inContext:context];
}
- (id)toObject
{
return valueToObject(_context, m_value);
}
- (id)toObjectOfClass:(Class)expectedClass
{
id result = [self toObject];
return [result isKindOfClass:expectedClass] ? result : nil;
}
- (BOOL)toBool
{
return JSValueToBoolean([_context JSGlobalContextRef], m_value);
}
- (double)toDouble
{
JSValueRef exception = 0;
double result = JSValueToNumber([_context JSGlobalContextRef], m_value, &exception);
if (exception) {
[_context notifyException:exception];
return std::numeric_limits<double>::quiet_NaN();
}
return result;
}
- (int32_t)toInt32
{
return JSC::toInt32([self toDouble]);
}
- (uint32_t)toUInt32
{
return JSC::toUInt32([self toDouble]);
}
- (NSNumber *)toNumber
{
JSValueRef exception = 0;
id result = valueToNumber([_context JSGlobalContextRef], m_value, &exception);
if (exception)
[_context notifyException:exception];
return result;
}
- (NSString *)toString
{
JSValueRef exception = 0;
id result = valueToString([_context JSGlobalContextRef], m_value, &exception);
if (exception)
[_context notifyException:exception];
return result;
}
- (NSDate *)toDate
{
JSValueRef exception = 0;
id result = valueToDate([_context JSGlobalContextRef], m_value, &exception);
if (exception)
[_context notifyException:exception];
return result;
}
- (NSArray *)toArray
{
JSValueRef exception = 0;
id result = valueToArray([_context JSGlobalContextRef], m_value, &exception);
if (exception)
[_context notifyException:exception];
return result;
}
- (NSDictionary *)toDictionary
{
JSValueRef exception = 0;
id result = valueToDictionary([_context JSGlobalContextRef], m_value, &exception);
if (exception)
[_context notifyException:exception];
return result;
}
- (JSValue *)valueForProperty:(NSString *)propertyName
{
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
JSStringRef name = JSStringCreateWithCFString((CFStringRef)propertyName);
JSValueRef result = JSObjectGetProperty([_context JSGlobalContextRef], object, name, &exception);
JSStringRelease(name);
if (exception)
return [_context valueFromNotifyException:exception];
return [JSValue valueWithJSValueRef:result inContext:_context];
}
- (void)setValue:(id)value forProperty:(NSString *)propertyName
{
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception) {
[_context notifyException:exception];
return;
}
JSStringRef name = JSStringCreateWithCFString((CFStringRef)propertyName);
JSObjectSetProperty([_context JSGlobalContextRef], object, name, objectToValue(_context, value), 0, &exception);
JSStringRelease(name);
if (exception) {
[_context notifyException:exception];
return;
}
}
- (BOOL)deleteProperty:(NSString *)propertyName
{
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context boolFromNotifyException:exception];
JSStringRef name = JSStringCreateWithCFString((CFStringRef)propertyName);
BOOL result = JSObjectDeleteProperty([_context JSGlobalContextRef], object, name, &exception);
JSStringRelease(name);
if (exception)
return [_context boolFromNotifyException:exception];
return result;
}
- (BOOL)hasProperty:(NSString *)propertyName
{
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context boolFromNotifyException:exception];
JSStringRef name = JSStringCreateWithCFString((CFStringRef)propertyName);
BOOL result = JSObjectHasProperty([_context JSGlobalContextRef], object, name);
JSStringRelease(name);
return result;
}
- (void)defineProperty:(NSString *)property descriptor:(id)descriptor
{
[[_context globalObject][@"Object"] invokeMethod:@"defineProperty" withArguments:@[ self, property, descriptor ]];
}
- (JSValue *)valueAtIndex:(NSUInteger)index
{
// Properties that are higher than an unsigned value can hold are converted to a double then inserted as a normal property.
// Indices that are bigger than the max allowed index size (UINT_MAX - 1) will be handled internally in get().
if (index != (unsigned)index)
return [self valueForProperty:[[JSValue valueWithDouble:index inContext:_context] toString]];
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
JSValueRef result = JSObjectGetPropertyAtIndex([_context JSGlobalContextRef], object, (unsigned)index, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
return [JSValue valueWithJSValueRef:result inContext:_context];
}
- (void)setValue:(id)value atIndex:(NSUInteger)index
{
// Properties that are higher than an unsigned value can hold are converted to a double, then inserted as a normal property.
// Indices that are bigger than the max allowed index size (UINT_MAX - 1) will be handled internally in putByIndex().
if (index != (unsigned)index)
return [self setValue:value forProperty:[[JSValue valueWithDouble:index inContext:_context] toString]];
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception) {
[_context notifyException:exception];
return;
}
JSObjectSetPropertyAtIndex([_context JSGlobalContextRef], object, (unsigned)index, objectToValue(_context, value), &exception);
if (exception) {
[_context notifyException:exception];
return;
}
}
- (BOOL)isUndefined
{
return JSValueIsUndefined([_context JSGlobalContextRef], m_value);
}
- (BOOL)isNull
{
return JSValueIsNull([_context JSGlobalContextRef], m_value);
}
- (BOOL)isBoolean
{
return JSValueIsBoolean([_context JSGlobalContextRef], m_value);
}
- (BOOL)isNumber
{
return JSValueIsNumber([_context JSGlobalContextRef], m_value);
}
- (BOOL)isString
{
return JSValueIsString([_context JSGlobalContextRef], m_value);
}
- (BOOL)isObject
{
return JSValueIsObject([_context JSGlobalContextRef], m_value);
}
- (BOOL)isEqualToObject:(id)value
{
return JSValueIsStrictEqual([_context JSGlobalContextRef], m_value, objectToValue(_context, value));
}
- (BOOL)isEqualWithTypeCoercionToObject:(id)value
{
JSValueRef exception = 0;
BOOL result = JSValueIsEqual([_context JSGlobalContextRef], m_value, objectToValue(_context, value), &exception);
if (exception)
return [_context boolFromNotifyException:exception];
return result;
}
- (BOOL)isInstanceOf:(id)value
{
JSValueRef exception = 0;
JSObjectRef constructor = JSValueToObject([_context JSGlobalContextRef], objectToValue(_context, value), &exception);
if (exception)
return [_context boolFromNotifyException:exception];
BOOL result = JSValueIsInstanceOfConstructor([_context JSGlobalContextRef], m_value, constructor, &exception);
if (exception)
return [_context boolFromNotifyException:exception];
return result;
}
- (JSValue *)callWithArguments:(NSArray *)argumentArray
{
NSUInteger argumentCount = [argumentArray count];
JSValueRef arguments[argumentCount];
for (unsigned i = 0; i < argumentCount; ++i)
arguments[i] = objectToValue(_context, [argumentArray objectAtIndex:i]);
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
JSValueRef result = JSObjectCallAsFunction([_context JSGlobalContextRef], object, 0, argumentCount, arguments, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
return [JSValue valueWithJSValueRef:result inContext:_context];
}
- (JSValue *)constructWithArguments:(NSArray *)argumentArray
{
NSUInteger argumentCount = [argumentArray count];
JSValueRef arguments[argumentCount];
for (unsigned i = 0; i < argumentCount; ++i)
arguments[i] = objectToValue(_context, [argumentArray objectAtIndex:i]);
JSValueRef exception = 0;
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
JSObjectRef result = JSObjectCallAsConstructor([_context JSGlobalContextRef], object, argumentCount, arguments, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
return [JSValue valueWithJSValueRef:result inContext:_context];
}
- (JSValue *)invokeMethod:(NSString *)method withArguments:(NSArray *)arguments
{
NSUInteger argumentCount = [arguments count];
JSValueRef argumentArray[argumentCount];
for (unsigned i = 0; i < argumentCount; ++i)
argumentArray[i] = objectToValue(_context, [arguments objectAtIndex:i]);
JSValueRef exception = 0;
JSObjectRef thisObject = JSValueToObject([_context JSGlobalContextRef], m_value, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
JSStringRef name = JSStringCreateWithCFString((CFStringRef)method);
JSValueRef function = JSObjectGetProperty([_context JSGlobalContextRef], thisObject, name, &exception);
JSStringRelease(name);
if (exception)
return [_context valueFromNotifyException:exception];
JSObjectRef object = JSValueToObject([_context JSGlobalContextRef], function, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
JSValueRef result = JSObjectCallAsFunction([_context JSGlobalContextRef], object, thisObject, argumentCount, argumentArray, &exception);
if (exception)
return [_context valueFromNotifyException:exception];
return [JSValue valueWithJSValueRef:result inContext:_context];
}
@end
@implementation JSValue(StructSupport)
- (CGPoint)toPoint
{
return (CGPoint){
[self[@"x"] toDouble],
[self[@"y"] toDouble]
};
}
- (NSRange)toRange
{
return (NSRange){
[[self[@"location"] toNumber] unsignedIntegerValue],
[[self[@"length"] toNumber] unsignedIntegerValue]
};
}
- (CGRect)toRect
{
return (CGRect){
[self toPoint],
[self toSize]
};
}
- (CGSize)toSize
{
return (CGSize){
[self[@"width"] toDouble],
[self[@"height"] toDouble]
};
}
+ (JSValue *)valueWithPoint:(CGPoint)point inContext:(JSContext *)context
{
return [JSValue valueWithObject:@{
@"x":@(point.x),
@"y":@(point.y)
} inContext:context];
}
+ (JSValue *)valueWithRange:(NSRange)range inContext:(JSContext *)context
{
return [JSValue valueWithObject:@{
@"location":@(range.location),
@"length":@(range.length)
} inContext:context];
}
+ (JSValue *)valueWithRect:(CGRect)rect inContext:(JSContext *)context
{
return [JSValue valueWithObject:@{
@"x":@(rect.origin.x),
@"y":@(rect.origin.y),
@"width":@(rect.size.width),
@"height":@(rect.size.height)
} inContext:context];
}
+ (JSValue *)valueWithSize:(CGSize)size inContext:(JSContext *)context
{
return [JSValue valueWithObject:@{
@"width":@(size.width),
@"height":@(size.height)
} inContext:context];
}
@end
@implementation JSValue(SubscriptSupport)
- (JSValue *)objectForKeyedSubscript:(id)key
{
if (![key isKindOfClass:[NSString class]]) {
key = [[JSValue valueWithObject:key inContext:_context] toString];
if (!key)
return [JSValue valueWithUndefinedInContext:_context];
}
return [self valueForProperty:(NSString *)key];
}
- (JSValue *)objectAtIndexedSubscript:(NSUInteger)index
{
return [self valueAtIndex:index];
}
- (void)setObject:(id)object forKeyedSubscript:(NSObject <NSCopying> *)key
{
if (![key isKindOfClass:[NSString class]]) {
key = [[JSValue valueWithObject:key inContext:_context] toString];
if (!key)
return;
}
[self setValue:object forProperty:(NSString *)key];
}
- (void)setObject:(id)object atIndexedSubscript:(NSUInteger)index
{
[self setValue:object atIndex:index];
}
@end
inline bool isDate(JSObjectRef object, JSGlobalContextRef context)
{
JSC::APIEntryShim entryShim(toJS(context));
return toJS(object)->inherits(&JSC::DateInstance::s_info);
}
inline bool isArray(JSObjectRef object, JSGlobalContextRef context)
{
JSC::APIEntryShim entryShim(toJS(context));
return toJS(object)->inherits(&JSC::JSArray::s_info);
}
@implementation JSValue(Internal)
enum ConversionType {
ContainerNone,
ContainerArray,
ContainerDictionary
};
class JSContainerConvertor {
public:
struct Task {
JSValueRef js;
id objc;
ConversionType type;
};
JSContainerConvertor(JSGlobalContextRef context)
: m_context(context)
{
}
id convert(JSValueRef property);
void add(Task);
Task take();
bool isWorkListEmpty() const { return !m_worklist.size(); }
private:
JSGlobalContextRef m_context;
HashMap<JSValueRef, id> m_objectMap;
Vector<Task> m_worklist;
};
inline id JSContainerConvertor::convert(JSValueRef value)
{
HashMap<JSValueRef, id>::iterator iter = m_objectMap.find(value);
if (iter != m_objectMap.end())
return iter->value;
Task result = valueToObjectWithoutCopy(m_context, value);
if (result.js)
add(result);
return result.objc;
}
void JSContainerConvertor::add(Task task)
{
m_objectMap.add(task.js, task.objc);
if (task.type != ContainerNone)
m_worklist.append(task);
}
JSContainerConvertor::Task JSContainerConvertor::take()
{
ASSERT(!isWorkListEmpty());
Task last = m_worklist.last();
m_worklist.removeLast();
return last;
}
static JSContainerConvertor::Task valueToObjectWithoutCopy(JSGlobalContextRef context, JSValueRef value)
{
if (!JSValueIsObject(context, value)) {
id primitive;
if (JSValueIsBoolean(context, value))
primitive = JSValueToBoolean(context, value) ? @YES : @NO;
else if (JSValueIsNumber(context, value)) {
// Normalize the number, so it will unique correctly in the hash map -
// it's nicer not to leak this internal implementation detail!
value = JSValueMakeNumber(context, JSValueToNumber(context, value, 0));
primitive = [NSNumber numberWithDouble:JSValueToNumber(context, value, 0)];
} else if (JSValueIsString(context, value)) {
// Would be nice to unique strings, too.
JSStringRef jsstring = JSValueToStringCopy(context, value, 0);
NSString * stringNS = (NSString *)JSStringCopyCFString(kCFAllocatorDefault, jsstring);
JSStringRelease(jsstring);
primitive = [stringNS autorelease];
} else if (JSValueIsNull(context, value))
primitive = [NSNull null];
else {
ASSERT(JSValueIsUndefined(context, value));
primitive = nil;
}
return (JSContainerConvertor::Task){ value, primitive, ContainerNone };
}
JSObjectRef object = JSValueToObject(context, value, 0);
if (id wrapped = tryUnwrapObjcObject(context, object))
return (JSContainerConvertor::Task){ object, wrapped, ContainerNone };
if (isDate(object, context))
return (JSContainerConvertor::Task){ object, [NSDate dateWithTimeIntervalSince1970:JSValueToNumber(context, object, 0)], ContainerNone };
if (isArray(object, context))
return (JSContainerConvertor::Task){ object, [NSMutableArray array], ContainerArray };
return (JSContainerConvertor::Task){ object, [NSMutableDictionary dictionary], ContainerDictionary };
}
static id containerValueToObject(JSGlobalContextRef context, JSContainerConvertor::Task task)
{
ASSERT(task.type != ContainerNone);
JSContainerConvertor convertor(context);
convertor.add(task);
ASSERT(!convertor.isWorkListEmpty());
do {
JSContainerConvertor::Task current = convertor.take();
ASSERT(JSValueIsObject(context, current.js));
JSObjectRef js = JSValueToObject(context, current.js, 0);
if (current.type == ContainerArray) {
ASSERT([current.objc isKindOfClass:[NSMutableArray class]]);
NSMutableArray *array = (NSMutableArray *)current.objc;
JSStringRef lengthString = JSStringCreateWithUTF8CString("length");
unsigned length = JSC::toUInt32(JSValueToNumber(context, JSObjectGetProperty(context, js, lengthString, 0), 0));
JSStringRelease(lengthString);
for (unsigned i = 0; i < length; ++i) {
id objc = convertor.convert(JSObjectGetPropertyAtIndex(context, js, i, 0));
[array addObject:objc ? objc : [NSNull null]];
}
} else {
ASSERT([current.objc isKindOfClass:[NSMutableDictionary class]]);
NSMutableDictionary *dictionary = (NSMutableDictionary *)current.objc;
JSPropertyNameArrayRef propertyNameArray = JSObjectCopyPropertyNames(context, js);
size_t length = JSPropertyNameArrayGetCount(propertyNameArray);
for (size_t i = 0; i < length; ++i) {
JSStringRef propertyName = JSPropertyNameArrayGetNameAtIndex(propertyNameArray, i);
if (id objc = convertor.convert(JSObjectGetProperty(context, js, propertyName, 0)))
dictionary[[(NSString *)JSStringCopyCFString(kCFAllocatorDefault, propertyName) autorelease]] = objc;
}
JSPropertyNameArrayRelease(propertyNameArray);
}
} while (!convertor.isWorkListEmpty());
return task.objc;
}
id valueToObject(JSContext *context, JSValueRef value)
{
JSContainerConvertor::Task result = valueToObjectWithoutCopy([context JSGlobalContextRef], value);
if (result.type == ContainerNone)
return result.objc;
return containerValueToObject([context JSGlobalContextRef], result);
}
id valueToNumber(JSGlobalContextRef context, JSValueRef value, JSValueRef* exception)
{
ASSERT(!*exception);
if (id wrapped = tryUnwrapObjcObject(context, value)) {
if ([wrapped isKindOfClass:[NSNumber class]])
return wrapped;
}
if (JSValueIsBoolean(context, value))
return JSValueToBoolean(context, value) ? @YES : @NO;
double result = JSValueToNumber(context, value, exception);
return [NSNumber numberWithDouble:*exception ? std::numeric_limits<double>::quiet_NaN() : result];
}
id valueToString(JSGlobalContextRef context, JSValueRef value, JSValueRef* exception)
{
ASSERT(!*exception);
if (id wrapped = tryUnwrapObjcObject(context, value)) {
if ([wrapped isKindOfClass:[NSString class]])
return wrapped;
}
JSStringRef jsstring = JSValueToStringCopy(context, value, exception);
if (*exception) {
ASSERT(!jsstring);
return nil;
}
NSString *stringNS = [(NSString *)JSStringCopyCFString(kCFAllocatorDefault, jsstring) autorelease];
JSStringRelease(jsstring);
return stringNS;
}
id valueToDate(JSGlobalContextRef context, JSValueRef value, JSValueRef* exception)
{
ASSERT(!*exception);
if (id wrapped = tryUnwrapObjcObject(context, value)) {
if ([wrapped isKindOfClass:[NSDate class]])
return wrapped;
}
double result = JSValueToNumber(context, value, exception);
return *exception ? nil : [NSDate dateWithTimeIntervalSince1970:result];
}
id valueToArray(JSGlobalContextRef context, JSValueRef value, JSValueRef* exception)
{
ASSERT(!*exception);
if (id wrapped = tryUnwrapObjcObject(context, value)) {
if ([wrapped isKindOfClass:[NSArray class]])
return wrapped;
}
if (JSValueIsObject(context, value))
return containerValueToObject(context, (JSContainerConvertor::Task){ value, [NSMutableArray array], ContainerArray});
if (!(JSValueIsNull(context, value) || JSValueIsUndefined(context, value)))
*exception = toRef(JSC::createTypeError(toJS(context), "Cannot convert primitive to NSArray"));
return nil;
}
id valueToDictionary(JSGlobalContextRef context, JSValueRef value, JSValueRef* exception)
{
ASSERT(!*exception);
if (id wrapped = tryUnwrapObjcObject(context, value)) {
if ([wrapped isKindOfClass:[NSDictionary class]])
return wrapped;
}
if (JSValueIsObject(context, value))
return containerValueToObject(context, (JSContainerConvertor::Task){ value, [NSMutableDictionary dictionary], ContainerDictionary});
if (!(JSValueIsNull(context, value) || JSValueIsUndefined(context, value)))
*exception = toRef(JSC::createTypeError(toJS(context), "Cannot convert primitive to NSDictionary"));
return nil;
}
class ObjcContainerConvertor {
public:
struct Task {
id objc;
JSValueRef js;
ConversionType type;
};
ObjcContainerConvertor(JSContext *context)
: m_context(context)
{
}
JSValueRef convert(id object);
void add(Task);
Task take();
bool isWorkListEmpty() const { return !m_worklist.size(); }
private:
JSContext *m_context;
HashMap<id, JSValueRef> m_objectMap;
Vector<Task> m_worklist;
};
JSValueRef ObjcContainerConvertor::convert(id object)
{
ASSERT(object);
auto it = m_objectMap.find(object);
if (it != m_objectMap.end())
return it->value;
ObjcContainerConvertor::Task task = objectToValueWithoutCopy(m_context, object);
add(task);
return task.js;
}
void ObjcContainerConvertor::add(ObjcContainerConvertor::Task task)
{
m_objectMap.add(task.objc, task.js);
if (task.type != ContainerNone)
m_worklist.append(task);
}
ObjcContainerConvertor::Task ObjcContainerConvertor::take()
{
ASSERT(!isWorkListEmpty());
Task last = m_worklist.last();
m_worklist.removeLast();
return last;
}
inline bool isNSBoolean(id object)
{
ASSERT([@YES class] == [@NO class]);
ASSERT([@YES class] != [NSNumber class]);
ASSERT([[@YES class] isSubclassOfClass:[NSNumber class]]);
return [object isKindOfClass:[@YES class]];
}
static ObjcContainerConvertor::Task objectToValueWithoutCopy(JSContext *context, id object)
{
JSGlobalContextRef contextRef = [context JSGlobalContextRef];
if (!object)
return (ObjcContainerConvertor::Task){ object, JSValueMakeUndefined(contextRef), ContainerNone };
if (!class_conformsToProtocol(object_getClass(object), getJSExportProtocol())) {
if ([object isKindOfClass:[NSArray class]])
return (ObjcContainerConvertor::Task){ object, JSObjectMakeArray(contextRef, 0, NULL, 0), ContainerArray };
if ([object isKindOfClass:[NSDictionary class]])
return (ObjcContainerConvertor::Task){ object, JSObjectMake(contextRef, 0, 0), ContainerDictionary };
if ([object isKindOfClass:[NSNull class]])
return (ObjcContainerConvertor::Task){ object, JSValueMakeNull(contextRef), ContainerNone };
if ([object isKindOfClass:[JSValue class]])
return (ObjcContainerConvertor::Task){ object, ((JSValue *)object)->m_value, ContainerNone };
if ([object isKindOfClass:[NSString class]]) {
JSStringRef string = JSStringCreateWithCFString((CFStringRef)object);
JSValueRef js = JSValueMakeString(contextRef, string);
JSStringRelease(string);
return (ObjcContainerConvertor::Task){ object, js, ContainerNone };
}
if ([object isKindOfClass:[NSNumber class]]) {
if (isNSBoolean(object))
return (ObjcContainerConvertor::Task){ object, JSValueMakeBoolean(contextRef, [object boolValue]), ContainerNone };
return (ObjcContainerConvertor::Task){ object, JSValueMakeNumber(contextRef, [object doubleValue]), ContainerNone };
}
if ([object isKindOfClass:[NSDate class]]) {
JSValueRef argument = JSValueMakeNumber(contextRef, [object timeIntervalSince1970]);
JSObjectRef result = JSObjectMakeDate(contextRef, 1, &argument, 0);
return (ObjcContainerConvertor::Task){ object, result, ContainerNone };
}
if ([object isKindOfClass:[JSManagedValue class]]) {
JSValue *value = [static_cast<JSManagedValue *>(object) value];
if (!value)
return (ObjcContainerConvertor::Task) { object, JSValueMakeUndefined(contextRef), ContainerNone };
return (ObjcContainerConvertor::Task){ object, value->m_value, ContainerNone };
}
}
return (ObjcContainerConvertor::Task){ object, valueInternalValue([context wrapperForObjCObject:object]), ContainerNone };
}
JSValueRef objectToValue(JSContext *context, id object)
{
JSGlobalContextRef contextRef = [context JSGlobalContextRef];
ObjcContainerConvertor::Task task = objectToValueWithoutCopy(context, object);
if (task.type == ContainerNone)
return task.js;
ObjcContainerConvertor convertor(context);
convertor.add(task);
ASSERT(!convertor.isWorkListEmpty());
do {
ObjcContainerConvertor::Task current = convertor.take();
ASSERT(JSValueIsObject(contextRef, current.js));
JSObjectRef js = JSValueToObject(contextRef, current.js, 0);
if (current.type == ContainerArray) {
ASSERT([current.objc isKindOfClass:[NSArray class]]);
NSArray *array = (NSArray *)current.objc;
NSUInteger count = [array count];
for (NSUInteger index = 0; index < count; ++index)
JSObjectSetPropertyAtIndex(contextRef, js, index, convertor.convert([array objectAtIndex:index]), 0);
} else {
ASSERT(current.type == ContainerDictionary);
ASSERT([current.objc isKindOfClass:[NSDictionary class]]);
NSDictionary *dictionary = (NSDictionary *)current.objc;
for (id key in [dictionary keyEnumerator]) {
if ([key isKindOfClass:[NSString class]]) {
JSStringRef propertyName = JSStringCreateWithCFString((CFStringRef)key);
JSObjectSetProperty(contextRef, js, propertyName, convertor.convert([dictionary objectForKey:key]), 0, 0);
JSStringRelease(propertyName);
}
}
}
} while (!convertor.isWorkListEmpty());
return task.js;
}
JSValueRef valueInternalValue(JSValue * value)
{
return value->m_value;
}
+ (JSValue *)valueWithJSValueRef:(JSValueRef)value inContext:(JSContext *)context
{
return [context wrapperForJSObject:value];
}
- (JSValue *)init
{
return nil;
}
- (JSValue *)initWithValue:(JSValueRef)value inContext:(JSContext *)context
{
if (!value || !context)
return nil;
self = [super init];
if (!self)
return nil;
_context = [context retain];
m_value = value;
JSValueProtect([_context JSGlobalContextRef], m_value);
return self;
}
struct StructTagHandler {
SEL typeToValueSEL;
SEL valueToTypeSEL;
};
typedef HashMap<String, StructTagHandler> StructHandlers;
static StructHandlers* createStructHandlerMap()
{
StructHandlers* structHandlers = new StructHandlers();
size_t valueWithXinContextLength = strlen("valueWithX:inContext:");
size_t toXLength = strlen("toX");
// Step 1: find all valueWith<Foo>:inContext: class methods in JSValue.
forEachMethodInClass(object_getClass([JSValue class]), ^(Method method){
SEL selector = method_getName(method);
const char* name = sel_getName(selector);
size_t nameLength = strlen(name);
// Check for valueWith<Foo>:context:
if (nameLength < valueWithXinContextLength || memcmp(name, "valueWith", 9) || memcmp(name + nameLength - 11, ":inContext:", 11))
return;
// Check for [ id, SEL, <type>, <contextType> ]
if (method_getNumberOfArguments(method) != 4)
return;
char idType[3];
// Check 2nd argument type is "@"
char* secondType = method_copyArgumentType(method, 3);
if (strcmp(secondType, "@") != 0) {
free(secondType);
return;
}
free(secondType);
// Check result type is also "@"
method_getReturnType(method, idType, 3);
if (strcmp(idType, "@") != 0)
return;
char* type = method_copyArgumentType(method, 2);
structHandlers->add(StringImpl::create(type), (StructTagHandler){ selector, 0 });
free(type);
});
// Step 2: find all to<Foo> instance methods in JSValue.
forEachMethodInClass([JSValue class], ^(Method method){
SEL selector = method_getName(method);
const char* name = sel_getName(selector);
size_t nameLength = strlen(name);
// Check for to<Foo>
if (nameLength < toXLength || memcmp(name, "to", 2))
return;
// Check for [ id, SEL ]
if (method_getNumberOfArguments(method) != 2)
return;
// Try to find a matching valueWith<Foo>:context: method.
char* type = method_copyReturnType(method);
StructHandlers::iterator iter = structHandlers->find(type);
free(type);
if (iter == structHandlers->end())
return;
StructTagHandler& handler = iter->value;
// check that strlen(<foo>) == strlen(<Foo>)
const char* valueWithName = sel_getName(handler.typeToValueSEL);
size_t valueWithLength = strlen(valueWithName);
if (valueWithLength - valueWithXinContextLength != nameLength - toXLength)
return;
// Check that <Foo> == <Foo>
if (memcmp(valueWithName + 9, name + 2, nameLength - toXLength - 1))
return;
handler.valueToTypeSEL = selector;
});
// Step 3: clean up - remove entries where we found prospective valueWith<Foo>:inContext: conversions, but no matching to<Foo> methods.
typedef HashSet<String> RemoveSet;
RemoveSet removeSet;
for (StructHandlers::iterator iter = structHandlers->begin(); iter != structHandlers->end(); ++iter) {
StructTagHandler& handler = iter->value;
if (!handler.valueToTypeSEL)
removeSet.add(iter->key);
}
for (RemoveSet::iterator iter = removeSet.begin(); iter != removeSet.end(); ++iter)
structHandlers->remove(*iter);
return structHandlers;
}
static StructTagHandler* handerForStructTag(const char* encodedType)
{
static SpinLock handerForStructTagLock = SPINLOCK_INITIALIZER;
SpinLockHolder lockHolder(&handerForStructTagLock);
static StructHandlers* structHandlers = createStructHandlerMap();
StructHandlers::iterator iter = structHandlers->find(encodedType);
if (iter == structHandlers->end())
return 0;
return &iter->value;
}
+ (SEL)selectorForStructToValue:(const char *)structTag
{
StructTagHandler* handler = handerForStructTag(structTag);
return handler ? handler->typeToValueSEL : nil;
}
+ (SEL)selectorForValueToStruct:(const char *)structTag
{
StructTagHandler* handler = handerForStructTag(structTag);
return handler ? handler->valueToTypeSEL : nil;
}
- (void)dealloc
{
JSValueUnprotect([_context JSGlobalContextRef], m_value);
[_context release];
_context = nil;
[super dealloc];
}
- (NSString *)description
{
if (id wrapped = tryUnwrapObjcObject([_context JSGlobalContextRef], m_value))
return [wrapped description];
return [self toString];
}
NSInvocation *typeToValueInvocationFor(const char* encodedType)
{
SEL selector = [JSValue selectorForStructToValue:encodedType];
if (!selector)
return 0;
const char* methodTypes = method_getTypeEncoding(class_getClassMethod([JSValue class], selector));
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[NSMethodSignature signatureWithObjCTypes:methodTypes]];
[invocation setSelector:selector];
return invocation;
}
NSInvocation *valueToTypeInvocationFor(const char* encodedType)
{
SEL selector = [JSValue selectorForValueToStruct:encodedType];
if (!selector)
return 0;
const char* methodTypes = method_getTypeEncoding(class_getInstanceMethod([JSValue class], selector));
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[NSMethodSignature signatureWithObjCTypes:methodTypes]];
[invocation setSelector:selector];
return invocation;
}
@end
#endif