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