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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_CSSPAINT_PAINT_WORKLET_GLOBAL_SCOPE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_CSSPAINT_PAINT_WORKLET_GLOBAL_SCOPE_H_
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/workers/worklet_global_scope.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
namespace blink {
class CSSPaintDefinition;
class ExceptionState;
class V8NoArgumentConstructor;
class WorkerReportingProxy;
class MODULES_EXPORT PaintWorkletGlobalScope final : public WorkletGlobalScope {
DEFINE_WRAPPERTYPEINFO();
USING_GARBAGE_COLLECTED_MIXIN(PaintWorkletGlobalScope);
public:
// Creates a main-thread bound PaintWorkletGlobalScope.
static PaintWorkletGlobalScope* Create(
LocalFrame*,
std::unique_ptr<GlobalScopeCreationParams>,
WorkerReportingProxy&);
// Creates an worklet-thread bound PaintWorkletGlobalScope.
static PaintWorkletGlobalScope* Create(
std::unique_ptr<GlobalScopeCreationParams>,
WorkerThread*);
PaintWorkletGlobalScope(LocalFrame*,
std::unique_ptr<GlobalScopeCreationParams>,
WorkerReportingProxy&);
PaintWorkletGlobalScope(std::unique_ptr<GlobalScopeCreationParams>,
WorkerThread*);
~PaintWorkletGlobalScope() override;
void Dispose() final;
bool IsPaintWorkletGlobalScope() const final { return true; }
void registerPaint(const String& name,
V8NoArgumentConstructor* paint_ctor,
ExceptionState&);
CSSPaintDefinition* FindDefinition(const String& name);
double devicePixelRatio() const;
void Trace(blink::Visitor*) override;
private:
// Registers the global scope with a proxy client, if not already done. Only
// used for worklet-thread bound PaintWorkletGlobalScopes.
void RegisterWithProxyClientIfNeeded();
// The implementation of the "paint definition" concept:
// https://drafts.css-houdini.org/css-paint-api/#paint-definition
typedef HeapHashMap<String, Member<CSSPaintDefinition>> DefinitionMap;
DefinitionMap paint_definitions_;
// Tracks whether this PaintWorkletGlobalScope has been registered with a
// PaintWorkletProxyClient. Only used in worklet-thread bound
// PaintWorkletGlobalScopes.
bool registered_ = false;
};
template <>
struct DowncastTraits<PaintWorkletGlobalScope> {
static bool AllowFrom(const ExecutionContext& context) {
return context.IsPaintWorkletGlobalScope();
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_CSSPAINT_PAINT_WORKLET_GLOBAL_SCOPE_H_