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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2003-2018 Apple Inc. All rights reserved.
* Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include "JSDOMGlobalObject.h"
#include "NodeConstants.h"
#include <JavaScriptCore/JSDestructibleObject.h>
#include <JavaScriptCore/StructureInlines.h>
#include <wtf/Compiler.h>
#include <wtf/SignedPtr.h>
namespace WebCore {
class ScriptExecutionContext;
// JSC allows us to extend JSType. If the highest 3 bits are set, we can add any Object types and they are
// recognized as OtherObj in JSC. And we encode Node type into JSType if the given JSType is subclass of Node.
// offset | 7 | 6 | 5 | 4 3 2 1 0 |
// value | 1 | 1 | 1 | Non-node DOM types |
// If the given JSType is a subclass of Node, the format is the following.
// offset | 7 | 6 | 5 | 4 | 3 2 1 0 |
// value | 1 | 1 | 1 | 1 | NodeType |
static const uint8_t JSDOMWrapperType = 0b11101110;
static const uint8_t JSEventType = 0b11101111;
static const uint8_t JSNodeType = 0b11110000;
static const uint8_t JSNodeTypeMask = 0b00001111;
static const uint8_t JSTextNodeType = JSNodeType | NodeConstants::TEXT_NODE;
static const uint8_t JSProcessingInstructionNodeType = JSNodeType | NodeConstants::PROCESSING_INSTRUCTION_NODE;
static const uint8_t JSDocumentTypeNodeType = JSNodeType | NodeConstants::DOCUMENT_TYPE_NODE;
static const uint8_t JSDocumentFragmentNodeType = JSNodeType | NodeConstants::DOCUMENT_FRAGMENT_NODE;
static const uint8_t JSDocumentWrapperType = JSNodeType | NodeConstants::DOCUMENT_NODE;
static const uint8_t JSCommentNodeType = JSNodeType | NodeConstants::COMMENT_NODE;
static const uint8_t JSCDATASectionNodeType = JSNodeType | NodeConstants::CDATA_SECTION_NODE;
static const uint8_t JSAttrNodeType = JSNodeType | NodeConstants::ATTRIBUTE_NODE;
static const uint8_t JSElementType = 0b11110000 | NodeConstants::ELEMENT_NODE;
static_assert(JSDOMWrapperType > JSC::LastJSCObjectType, "JSC::JSType offers the highest bit.");
static_assert(NodeConstants::LastNodeType <= JSNodeTypeMask, "NodeType should be represented in 4bit.");
class JSDOMObject : public JSC::JSDestructibleObject {
public:
typedef JSC::JSDestructibleObject Base;
template<typename, JSC::SubspaceAccess>
static void subspaceFor(JSC::VM&) { RELEASE_ASSERT_NOT_REACHED(); }
JSDOMGlobalObject* globalObject() const { return JSC::jsCast<JSDOMGlobalObject*>(JSC::JSNonFinalObject::globalObject()); }
ScriptExecutionContext* scriptExecutionContext() const { return globalObject()->scriptExecutionContext(); }
protected:
WEBCORE_EXPORT JSDOMObject(JSC::Structure*, JSC::JSGlobalObject&);
};
template<typename ImplementationClass, typename PtrTraits = RawPtrTraits<ImplementationClass>>
class JSDOMWrapper : public JSDOMObject {
public:
using Base = JSDOMObject;
using DOMWrapped = ImplementationClass;
ImplementationClass& wrapped() const { return m_wrapped; }
Ref<ImplementationClass> protectedWrapped() const { return m_wrapped; }
static constexpr ptrdiff_t offsetOfWrapped() { return OBJECT_OFFSETOF(JSDOMWrapper, m_wrapped); }
constexpr static bool hasCustomPtrTraits() { return !std::is_same_v<PtrTraits, RawPtrTraits<ImplementationClass>>; };
protected:
JSDOMWrapper(JSC::Structure* structure, JSC::JSGlobalObject& globalObject, Ref<ImplementationClass>&& impl)
: Base(structure, globalObject)
, m_wrapped(WTFMove(impl)) { }
private:
Ref<ImplementationClass, PtrTraits> m_wrapped;
};
template<typename ImplementationClass> struct JSDOMWrapperConverterTraits;
JSC::JSValue cloneAcrossWorlds(JSC::JSGlobalObject&, const JSDOMObject& owner, JSC::JSValue);
} // namespace WebCore
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