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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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SCRIPT_MODULE_RECORD_RESOLVER_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SCRIPT_MODULE_RECORD_RESOLVER_IMPL_H_
#include "third_party/blink/renderer/bindings/core/v8/boxed_v8_module.h"
#include "third_party/blink/renderer/bindings/core/v8/module_record.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/script/module_record_resolver.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class Modulator;
class ModuleScript;
class ModuleRecord;
// The ModuleRecordResolverImpl implements ModuleRecordResolver interface
// and implements "HostResolveImportedModule" HTML spec algorithm to bridge
// ModuleMap (via Modulator) and V8 bindings.
class CORE_EXPORT ModuleRecordResolverImpl final
: public ModuleRecordResolver,
public ExecutionContextLifecycleObserver {
public:
explicit ModuleRecordResolverImpl(Modulator* modulator,
ExecutionContext* execution_context)
: ExecutionContextLifecycleObserver(execution_context),
modulator_(modulator) {}
void Trace(Visitor*) const override;
private:
// Implements ModuleRecordResolver:
void RegisterModuleScript(const ModuleScript*) final;
void UnregisterModuleScript(const ModuleScript*) final;
const ModuleScript* GetModuleScriptFromModuleRecord(
v8::Local<v8::Module>) const final;
// Implements "Runtime Semantics: HostResolveImportedModule" per HTML spec.
// https://html.spec.whatwg.org/C/#hostresolveimportedmodule(referencingscriptormodule,-specifier))
v8::Local<v8::Module> Resolve(const ModuleRequest& module_request,
v8::Local<v8::Module> referrer,
ExceptionState&) final;
// Implements ExecutionContextLifecycleObserver:
void ContextDestroyed() final;
// Corresponds to the spec concept "referencingModule.[[HostDefined]]".
// crbug.com/725816 : ModuleRecord contains strong ref to v8::Module thus we
// should not use ModuleRecord as the map key. We currently rely on Detach()
// to clear the refs, but we should implement a key type which keeps a
// weak-ref to v8::Module.
HeapHashMap<Member<BoxedV8Module>, Member<const ModuleScript>>
record_to_module_script_map_;
Member<Modulator> modulator_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_SCRIPT_MODULE_RECORD_RESOLVER_IMPL_H_
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