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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_ModuleLoadRequest_h
#define mozilla_dom_ModuleLoadRequest_h
#include "ScriptLoadRequest.h"
#include "js/RootingAPI.h"
#include "js/Value.h"
#include "nsURIHashKey.h"
#include "mozilla/MozPromise.h"
#include "nsTHashtable.h"
namespace mozilla {
namespace dom {
class ModuleScript;
class ScriptLoader;
// A reference counted set of URLs we have visited in the process of loading a
// module graph.
class VisitedURLSet : public nsTHashtable<nsURIHashKey> {
NS_INLINE_DECL_REFCOUNTING(VisitedURLSet)
private:
~VisitedURLSet() = default;
};
// A load request for a module, created for every top level module script and
// every module import. Load request can share an ModuleScript if there are
// multiple imports of the same module.
class ModuleLoadRequest final : public ScriptLoadRequest {
~ModuleLoadRequest() = default;
ModuleLoadRequest(const ModuleLoadRequest& aOther) = delete;
ModuleLoadRequest(ModuleLoadRequest&& aOther) = delete;
ModuleLoadRequest(nsIURI* aURI, ScriptFetchOptions* aFetchOptions,
const SRIMetadata& aIntegrity, nsIURI* aReferrer,
bool aIsTopLevel, bool aIsDynamicImport,
ScriptLoader* aLoader, VisitedURLSet* aVisitedSet);
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
// Create a top-level module load request.
static ModuleLoadRequest* CreateTopLevel(nsIURI* aURI,
ScriptFetchOptions* aFetchOptions,
const SRIMetadata& aIntegrity,
nsIURI* aReferrer,
ScriptLoader* aLoader);
// Create a module load request for a static module import.
static ModuleLoadRequest* CreateStaticImport(nsIURI* aURI,
ModuleLoadRequest* aParent);
// Create a module load request for dynamic module import.
static ModuleLoadRequest* CreateDynamicImport(
nsIURI* aURI, ScriptFetchOptions* aFetchOptions, nsIURI* aBaseURL,
ScriptLoader* aLoader, JS::Handle<JS::Value> aReferencingPrivate,
JS::Handle<JSString*> aSpecifier, JS::Handle<JSObject*> aPromise);
bool IsTopLevel() const override { return mIsTopLevel; }
bool IsDynamicImport() const { return mIsDynamicImport; }
void SetReady() override;
void Cancel() override;
void ClearDynamicImport();
void ModuleLoaded();
void ModuleErrored();
void DependenciesLoaded();
void LoadFailed();
private:
void LoadFinished();
void CancelImports();
public:
// Is this a request for a top level module script or an import?
const bool mIsTopLevel;
// Is this the top level request for a dynamic module import?
const bool mIsDynamicImport;
// Pointer to the script loader, used to trigger actions when the module load
// finishes.
RefPtr<ScriptLoader> mLoader;
// Set to a module script object after a successful load or nullptr on
// failure.
RefPtr<ModuleScript> mModuleScript;
// A promise that is completed on successful load of this module and all of
// its dependencies, indicating that the module is ready for instantiation and
// evaluation.
MozPromiseHolder<GenericPromise> mReady;
// Array of imported modules.
nsTArray<RefPtr<ModuleLoadRequest>> mImports;
// Set of module URLs visited while fetching the module graph this request is
// part of.
RefPtr<VisitedURLSet> mVisitedSet;
// For dynamic imports, the details to pass to FinishDynamicImport.
JS::Heap<JS::Value> mDynamicReferencingPrivate;
JS::Heap<JSString*> mDynamicSpecifier;
JS::Heap<JSObject*> mDynamicPromise;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_ModuleLoadRequest_h
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