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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_LOADER_MODULESCRIPT_MODULE_SCRIPT_LOADER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_MODULESCRIPT_MODULE_SCRIPT_LOADER_H_
#include "base/macros.h"
#include "third_party/blink/public/platform/web_url_request.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/loader/modulescript/module_script_creation_params.h"
#include "third_party/blink/renderer/core/loader/modulescript/module_script_fetch_request.h"
#include "third_party/blink/renderer/core/loader/modulescript/module_script_fetcher.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
namespace blink {
class Modulator;
class ModuleScript;
class ModuleScriptLoaderClient;
class ModuleScriptLoaderRegistry;
class ResourceFetcher;
enum class ModuleGraphLevel;
// ModuleScriptLoader is responsible for loading a new single ModuleScript.
//
// ModuleScriptLoader constructs FetchParameters and asks ModuleScriptFetcher
// to fetch a script with the parameters. Then, it returns its client a compiled
// ModuleScript.
//
// ModuleScriptLoader(s) should only be used via Modulator and its ModuleMap.
class CORE_EXPORT ModuleScriptLoader final
: public GarbageCollected<ModuleScriptLoader>,
public ModuleScriptFetcher::Client {
USING_GARBAGE_COLLECTED_MIXIN(ModuleScriptLoader);
enum class State {
kInitial,
// FetchParameters is being processed, and ModuleScriptLoader hasn't
// notifyFinished().
kFetching,
// Finished successfully or w/ error.
kFinished,
};
public:
ModuleScriptLoader(Modulator*,
const ScriptFetchOptions&,
ModuleScriptLoaderRegistry*,
ModuleScriptLoaderClient*);
~ModuleScriptLoader();
static void Fetch(const ModuleScriptFetchRequest&,
ResourceFetcher* fetch_client_settings_object_fetcher,
ModuleGraphLevel,
Modulator* module_map_settings_object,
ModuleScriptCustomFetchType,
ModuleScriptLoaderRegistry*,
ModuleScriptLoaderClient*);
// Implements ModuleScriptFetcher::Client.
void NotifyFetchFinished(
const base::Optional<ModuleScriptCreationParams>&,
const HeapVector<Member<ConsoleMessage>>& error_messages) override;
bool IsInitialState() const { return state_ == State::kInitial; }
bool HasFinished() const { return state_ == State::kFinished; }
void Trace(Visitor*) override;
friend class WorkletModuleResponsesMapTest;
private:
void FetchInternal(const ModuleScriptFetchRequest&,
ResourceFetcher* fetch_client_settings_object_fetcher,
ModuleGraphLevel,
ModuleScriptCustomFetchType);
void AdvanceState(State new_state);
using PassKey = util::PassKey<ModuleScriptLoader>;
// PassKey should be private and cannot be accessed from outside, but allow
// accessing only from friend classes for testing.
static util::PassKey<ModuleScriptLoader> CreatePassKeyForTests() {
return PassKey();
}
#if DCHECK_IS_ON()
static const char* StateToString(State);
#endif
Member<Modulator> modulator_;
State state_ = State::kInitial;
const ScriptFetchOptions options_;
Member<ModuleScript> module_script_;
Member<ModuleScriptLoaderRegistry> registry_;
Member<ModuleScriptLoaderClient> client_;
Member<ModuleScriptFetcher> module_fetcher_;
#if DCHECK_IS_ON()
KURL url_;
#endif
DISALLOW_COPY_AND_ASSIGN(ModuleScriptLoader);
};
} // namespace blink
#endif
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