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/*
* Copyright (C) 2018-2021 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"
#include "PaintWorkletGlobalScope.h"
#if ENABLE(CSS_PAINTING_API)
#include "Document.h"
#include "JSCSSPaintCallback.h"
#include "JSDOMConvert.h"
#include "LocalDOMWindow.h"
#include "RenderView.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/SetForScope.h>
namespace WebCore {
using namespace JSC;
WTF_MAKE_ISO_ALLOCATED_IMPL(PaintWorkletGlobalScope);
RefPtr<PaintWorkletGlobalScope> PaintWorkletGlobalScope::tryCreate(Document& document, ScriptSourceCode&& code)
{
RefPtr<VM> vm = VM::tryCreate();
if (!vm)
return nullptr;
auto scope = adoptRef(*new PaintWorkletGlobalScope(document, vm.releaseNonNull(), WTFMove(code)));
scope->addToContextsMap();
return scope;
}
PaintWorkletGlobalScope::PaintWorkletGlobalScope(Document& document, Ref<VM>&& vm, ScriptSourceCode&& code)
: WorkletGlobalScope(document, WTFMove(vm), WTFMove(code))
{
}
double PaintWorkletGlobalScope::devicePixelRatio() const
{
if (!responsibleDocument() || !responsibleDocument()->domWindow())
return 1.0;
return responsibleDocument()->domWindow()->devicePixelRatio();
}
PaintWorkletGlobalScope::PaintDefinition::PaintDefinition(const AtomString& name, JSC::JSObject* paintConstructor, Ref<CSSPaintCallback>&& paintCallback, Vector<AtomString>&& inputProperties, Vector<String>&& inputArguments)
: name(name)
, paintConstructor(paintConstructor)
, paintCallback(WTFMove(paintCallback))
, inputProperties(WTFMove(inputProperties))
, inputArguments(WTFMove(inputArguments))
{
}
// https://drafts.css-houdini.org/css-paint-api/#registering-custom-paint
ExceptionOr<void> PaintWorkletGlobalScope::registerPaint(JSC::JSGlobalObject& globalObject, const AtomString& name, Strong<JSObject> paintConstructor)
{
auto& vm = paintConstructor->vm();
JSC::JSLockHolder lock(vm);
auto scope = DECLARE_THROW_SCOPE(vm);
// Validate that paintConstructor is a VoidFunction
if (!paintConstructor->isCallable())
return Exception { TypeError, "paintConstructor must be callable"_s };
if (name.isEmpty())
return Exception { TypeError, "The first argument must not be the empty string"_s };
{
Locker locker { paintDefinitionLock() };
if (paintDefinitionMap().contains(name))
return Exception { InvalidModificationError, "This name has already been registered"_s };
Vector<AtomString> inputProperties;
JSValue inputPropertiesIterableValue = paintConstructor->get(&globalObject, Identifier::fromString(vm, "inputProperties"_s));
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
if (!inputPropertiesIterableValue.isUndefined())
inputProperties = convert<IDLSequence<IDLAtomStringAdaptor<IDLDOMString>>>(globalObject, inputPropertiesIterableValue);
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
// FIXME: Validate input properties here (step 7).
Vector<String> inputArguments;
JSValue inputArgumentsIterableValue = paintConstructor->get(&globalObject, Identifier::fromString(vm, "inputArguments"_s));
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
if (!inputArgumentsIterableValue.isUndefined())
inputArguments = convert<IDLSequence<IDLDOMString>>(globalObject, inputArgumentsIterableValue);
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
// FIXME: Parse syntax for inputArguments here (steps 11 and 12).
JSValue contextOptionsValue = paintConstructor->get(&globalObject, Identifier::fromString(vm, "contextOptions"_s));
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
UNUSED_PARAM(contextOptionsValue);
// FIXME: Convert to PaintRenderingContext2DSettings here (step 14).
if (!paintConstructor->isConstructor())
return Exception { TypeError, "The second argument must be a constructor"_s };
JSValue prototypeValue = paintConstructor->get(&globalObject, vm.propertyNames->prototype);
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
if (!prototypeValue.isObject())
return Exception { TypeError, "The second argument must have a prototype that is an object"_s };
JSValue paintValue = prototypeValue.get(&globalObject, Identifier::fromString(vm, "paint"_s));
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
if (paintValue.isUndefined())
return Exception { TypeError, "The class must have a paint method"_s };
RefPtr<JSCSSPaintCallback> paint = convert<IDLCallbackFunction<JSCSSPaintCallback>>(globalObject, paintValue, *jsCast<JSDOMGlobalObject*>(&globalObject));
RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
auto paintDefinition = makeUnique<PaintDefinition>(name, paintConstructor.get(), paint.releaseNonNull(), WTFMove(inputProperties), WTFMove(inputArguments));
paintDefinitionMap().add(name, WTFMove(paintDefinition));
}
// This is for the case when we have already visited the paint definition map, and the GC is currently running in the background.
vm.writeBarrier(&globalObject);
// FIXME: construct documentDefinition (step 22).
// FIXME: we should only repaint affected custom paint images <https://bugs.webkit.org/show_bug.cgi?id=192322>.
if (responsibleDocument() && responsibleDocument()->renderView())
responsibleDocument()->renderView()->repaintRootContents();
return { };
}
} // namespace WebCore
#endif
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