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// Copyright 2017 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.
#include "third_party/blink/renderer/core/script/modulator.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/script/document_modulator_impl.h"
#include "third_party/blink/renderer/core/script/worker_modulator_impl.h"
#include "third_party/blink/renderer/core/script/worklet_modulator_impl.h"
#include "third_party/blink/renderer/core/workers/worker_global_scope.h"
#include "third_party/blink/renderer/core/workers/worklet_global_scope.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/bindings/v8_per_context_data.h"
namespace blink {
namespace {
const char kPerContextDataKey[] = "Modulator";
} // namespace
Modulator* Modulator::From(ScriptState* script_state) {
if (!script_state)
return nullptr;
V8PerContextData* per_context_data = script_state->PerContextData();
if (!per_context_data)
return nullptr;
Modulator* modulator =
static_cast<Modulator*>(per_context_data->GetData(kPerContextDataKey));
if (modulator)
return modulator;
ExecutionContext* execution_context = ExecutionContext::From(script_state);
if (auto* window = DynamicTo<LocalDOMWindow>(execution_context)) {
modulator = MakeGarbageCollected<DocumentModulatorImpl>(script_state);
Modulator::SetModulator(script_state, modulator);
// See comment in LocalDOMWindow::modulator_ for this workaround.
window->SetModulator(modulator);
} else if (auto* worklet_scope =
DynamicTo<WorkletGlobalScope>(execution_context)) {
modulator = MakeGarbageCollected<WorkletModulatorImpl>(script_state);
Modulator::SetModulator(script_state, modulator);
// See comment in WorkerOrWorkletGlobalScope::modulator_ for this
// workaround.
worklet_scope->SetModulator(modulator);
} else if (auto* worker_scope =
DynamicTo<WorkerGlobalScope>(execution_context)) {
modulator = MakeGarbageCollected<WorkerModulatorImpl>(script_state);
Modulator::SetModulator(script_state, modulator);
// See comment in WorkerOrWorkletGlobalScope::modulator_ for this
// workaround.
worker_scope->SetModulator(modulator);
} else {
NOTREACHED();
}
return modulator;
}
Modulator::~Modulator() {}
void Modulator::SetModulator(ScriptState* script_state, Modulator* modulator) {
DCHECK(script_state);
V8PerContextData* per_context_data = script_state->PerContextData();
DCHECK(per_context_data);
per_context_data->AddData(kPerContextDataKey, modulator);
}
void Modulator::ClearModulator(ScriptState* script_state) {
DCHECK(script_state);
V8PerContextData* per_context_data = script_state->PerContextData();
DCHECK(per_context_data);
per_context_data->ClearData(kPerContextDataKey);
}
} // namespace blink
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