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/*
* Copyright (C) 2018-2020 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.
*/
#pragma once
#include "CSSPaintCallback.h"
#include "WorkletGlobalScope.h"
#include <JavaScriptCore/JSObject.h>
#include <JavaScriptCore/Strong.h>
#include <wtf/Lock.h>
namespace WebCore {
struct PaintDefinition;
}
namespace WTF {
template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
template<> struct IsDeprecatedWeakRefSmartPointerException<WebCore::PaintDefinition> : std::true_type { };
}
namespace JSC {
class JSObject;
class VM;
} // namespace JSC
namespace WebCore {
class JSDOMGlobalObject;
// All paint definitions must be destroyed before the vm is destroyed, because otherwise they will point to freed memory.
struct PaintDefinition : public CanMakeWeakPtr<PaintDefinition> {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
PaintDefinition(const AtomString& name, JSC::JSObject* paintConstructor, Ref<CSSPaintCallback>&&, Vector<AtomString>&& inputProperties, Vector<String>&& inputArguments);
const AtomString name;
const JSC::JSObject* const paintConstructor;
const Ref<CSSPaintCallback> paintCallback;
const Vector<AtomString> inputProperties;
const Vector<String> inputArguments;
};
class PaintWorkletGlobalScope final : public WorkletGlobalScope {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(PaintWorkletGlobalScope);
public:
static RefPtr<PaintWorkletGlobalScope> tryCreate(Document&, ScriptSourceCode&&);
ExceptionOr<void> registerPaint(JSC::JSGlobalObject&, const AtomString& name, JSC::Strong<JSC::JSObject> paintConstructor);
double devicePixelRatio() const;
HashMap<String, std::unique_ptr<PaintDefinition>>& paintDefinitionMap() WTF_REQUIRES_LOCK(m_paintDefinitionLock);
Lock& paintDefinitionLock() WTF_RETURNS_LOCK(m_paintDefinitionLock) { return m_paintDefinitionLock; }
void prepareForDestruction() final
{
if (m_hasPreparedForDestruction)
return;
m_hasPreparedForDestruction = true;
{
Locker locker { paintDefinitionLock() };
paintDefinitionMap().clear();
}
WorkletGlobalScope::prepareForDestruction();
}
FetchOptions::Destination destination() const final { return FetchOptions::Destination::Paintworklet; }
private:
PaintWorkletGlobalScope(Document&, Ref<JSC::VM>&&, ScriptSourceCode&&);
~PaintWorkletGlobalScope()
{
#if ASSERT_ENABLED
Locker locker { paintDefinitionLock() };
ASSERT(paintDefinitionMap().isEmpty());
#endif
}
bool isPaintWorkletGlobalScope() const final { return true; }
HashMap<String, std::unique_ptr<PaintDefinition>> m_paintDefinitionMap WTF_GUARDED_BY_LOCK(m_paintDefinitionLock);
Lock m_paintDefinitionLock;
bool m_hasPreparedForDestruction { false };
};
inline auto PaintWorkletGlobalScope::paintDefinitionMap() -> HashMap<String, std::unique_ptr<PaintDefinition>>&
{
ASSERT(m_paintDefinitionLock.isLocked());
return m_paintDefinitionMap;
}
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::PaintWorkletGlobalScope)
static bool isType(const WebCore::ScriptExecutionContext& context)
{
auto* global = dynamicDowncast<WebCore::WorkletGlobalScope>(context);
return global && global->isPaintWorkletGlobalScope();
}
static bool isType(const WebCore::WorkletGlobalScope& context) { return context.isPaintWorkletGlobalScope(); }
SPECIALIZE_TYPE_TRAITS_END()
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