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/*
* Copyright (C) 2016 Canon, 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 CANON 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 CANON 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.
*/
#ifndef JSKeyValueIterator_h
#define JSKeyValueIterator_h
#include "JSDOMBinding.h"
#include <runtime/JSDestructibleObject.h>
#include <type_traits>
namespace WebCore {
template<typename JSWrapper>
class JSKeyValueIteratorPrototype : public JSC::JSNonFinalObject {
public:
using DOMWrapped = typename std::remove_reference<decltype(std::declval<JSWrapper>().wrapped())>::type;
using Base = JSC::JSNonFinalObject;
static JSKeyValueIteratorPrototype* create(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure)
{
JSKeyValueIteratorPrototype* prototype = new (NotNull, JSC::allocateCell<JSKeyValueIteratorPrototype>(vm.heap)) JSKeyValueIteratorPrototype(vm, structure);
prototype->finishCreation(vm, globalObject);
return prototype;
}
DECLARE_INFO;
static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
{
return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
}
static JSC::EncodedJSValue JSC_HOST_CALL next(JSC::ExecState*);
private:
JSKeyValueIteratorPrototype(JSC::VM& vm, JSC::Structure* structure) : Base(vm, structure) { }
void finishCreation(JSC::VM&, JSC::JSGlobalObject*);
};
enum class IterationKind { Key, Value, KeyValue };
template<typename JSWrapper>
class JSKeyValueIterator: public JSDOMObject {
public:
using DOMWrapped = typename std::remove_reference<decltype(std::declval<JSWrapper>().wrapped())>::type;
using Base = JSDOMObject;
DECLARE_INFO;
static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
{
return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
}
static JSKeyValueIterator* create(JSC::VM& vm, JSC::Structure* structure, JSWrapper& iteratedObject, IterationKind kind)
{
JSKeyValueIterator* instance = new (NotNull, JSC::allocateCell<JSKeyValueIterator>(vm.heap)) JSKeyValueIterator(structure, iteratedObject, kind);
instance->finishCreation(vm);
return instance;
}
static JSKeyValueIteratorPrototype<JSWrapper>* createPrototype(JSC::VM& vm, JSC::JSGlobalObject* globalObject)
{
return JSKeyValueIteratorPrototype<JSWrapper>::create(vm, globalObject,
JSKeyValueIteratorPrototype<JSWrapper>::createStructure(vm, globalObject, globalObject->objectPrototype()));
}
bool next(JSC::ExecState&, JSC::JSValue&);
private:
JSKeyValueIterator(JSC::Structure* structure, JSWrapper& iteratedObject, IterationKind kind)
: Base(structure, *iteratedObject.globalObject())
, m_iterator(iteratedObject.wrapped().createIterator())
, m_kind(kind)
{
}
static void destroy(JSC::JSCell*);
typename DOMWrapped::Iterator m_iterator;
IterationKind m_kind;
};
template<typename JSWrapper>
JSKeyValueIterator<JSWrapper>* createIterator(JSDOMGlobalObject& globalObject, JSWrapper& wrapper, IterationKind kind)
{
return JSKeyValueIterator<JSWrapper>::create(globalObject.vm(), getDOMStructure<JSKeyValueIterator<JSWrapper>>(globalObject.vm(), globalObject), wrapper, kind);
}
template<typename JSWrapper>
void JSKeyValueIterator<JSWrapper>::destroy(JSCell* cell)
{
JSKeyValueIterator<JSWrapper>* thisObject = JSC::jsCast<JSKeyValueIterator<JSWrapper>*>(cell);
thisObject->JSKeyValueIterator<JSWrapper>::~JSKeyValueIterator();
}
template<typename JSWrapper>
bool JSKeyValueIterator<JSWrapper>::next(JSC::ExecState& state, JSC::JSValue& value)
{
typename DOMWrapped::Iterator::Key nextKey;
typename DOMWrapped::Iterator::Value nextValue;
if (m_iterator.next(nextKey, nextValue)) {
value = JSC::jsUndefined();
return true;
}
if (m_kind == IterationKind::Value)
value = toJS(&state, globalObject(), nextValue);
else if (m_kind == IterationKind::Key)
value = toJS(&state, globalObject(), nextKey);
else
value = jsPair(state, globalObject(), nextKey, nextValue);
return false;
}
template<typename JSWrapper>
JSC::EncodedJSValue JSC_HOST_CALL JSKeyValueIteratorPrototype<JSWrapper>::next(JSC::ExecState* state)
{
JSKeyValueIterator<JSWrapper>* iterator = JSC::jsDynamicCast<JSKeyValueIterator<JSWrapper>*>(state->thisValue());
if (!iterator)
return JSC::JSValue::encode(throwTypeError(state, ASCIILiteral("Cannot call next() on a non-Iterator object")));
JSC::JSValue result;
bool isDone = iterator->next(*state, result);
return JSC::JSValue::encode(createIteratorResultObject(state, result, isDone));
}
template<typename JSWrapper>
void JSKeyValueIteratorPrototype<JSWrapper>::finishCreation(JSC::VM& vm, JSC::JSGlobalObject* globalObject)
{
Base::finishCreation(vm);
ASSERT(inherits(info()));
JSC_NATIVE_INTRINSIC_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->next, next, JSC::DontEnum, 0, JSC::NoIntrinsic);
}
}
#endif // !defined(JSKeyValueIterator_h)
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