tor-browser

The Tor Browser
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SyncModuleLoader.h (3529B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_loader_SyncModuleLoader_h
      8 #define mozilla_loader_SyncModuleLoader_h
      9 
     10 #include "js/loader/LoadContextBase.h"
     11 #include "js/loader/ModuleLoaderBase.h"
     12 
     13 class mozJSModuleLoader;
     14 
     15 namespace mozilla {
     16 namespace loader {
     17 
     18 class SyncScriptLoader : public JS::loader::ScriptLoaderInterface {
     19 public:
     20  NS_DECL_ISUPPORTS
     21 
     22 private:
     23  ~SyncScriptLoader() = default;
     24 
     25  nsIURI* GetBaseURI() const override;
     26 
     27  void ReportErrorToConsole(ScriptLoadRequest* aRequest,
     28                            nsresult aResult) const override;
     29 
     30  void ReportWarningToConsole(ScriptLoadRequest* aRequest,
     31                              const char* aMessageName,
     32                              const nsTArray<nsString>& aParams) const override;
     33 
     34  nsresult FillCompileOptionsForRequest(
     35      JSContext* cx, ScriptLoadRequest* aRequest, JS::CompileOptions* aOptions,
     36      JS::MutableHandle<JSScript*> aIntroductionScript) override;
     37 };
     38 
     39 class SyncModuleLoader : public JS::loader::ModuleLoaderBase {
     40 public:
     41  NS_DECL_ISUPPORTS_INHERITED
     42  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SyncModuleLoader,
     43                                           JS::loader::ModuleLoaderBase)
     44 
     45  SyncModuleLoader(SyncScriptLoader* aScriptLoader,
     46                   nsIGlobalObject* aGlobalObject);
     47 
     48  [[nodiscard]] nsresult ProcessRequests();
     49 
     50  void MaybeReportLoadError(JSContext* aCx);
     51 
     52 private:
     53  ~SyncModuleLoader();
     54 
     55  already_AddRefed<ModuleLoadRequest> CreateRequest(
     56      JSContext* aCx, nsIURI* aURI, JS::Handle<JSObject*> aModuleRequest,
     57      JS::Handle<JS::Value> aHostDefined, JS::Handle<JS::Value> aPayload,
     58      bool aIsDynamicImport, JS::loader::ScriptFetchOptions* aOptions,
     59      dom::ReferrerPolicy aReferrerPolicy, nsIURI* aBaseURL,
     60      const dom::SRIMetadata& aSriMetadata) override;
     61 
     62  void OnDynamicImportStarted(ModuleLoadRequest* aRequest) override;
     63 
     64  bool CanStartLoad(ModuleLoadRequest* aRequest, nsresult* aRvOut) override;
     65 
     66  nsresult StartFetch(ModuleLoadRequest* aRequest) override;
     67 
     68  nsresult CompileFetchedModule(
     69      JSContext* aCx, JS::Handle<JSObject*> aGlobal,
     70      JS::CompileOptions& aOptions, ModuleLoadRequest* aRequest,
     71      JS::MutableHandle<JSObject*> aModuleScript) override;
     72 
     73  void OnModuleLoadComplete(ModuleLoadRequest* aRequest) override;
     74 
     75  JS::loader::ScriptLoadRequestList mLoadRequests;
     76 
     77  // If any of module scripts failed to load, exception is set here until it's
     78  // reported by MaybeReportLoadError.
     79  JS::PersistentRooted<JS::Value> mLoadException;
     80 };
     81 
     82 // Data specific to SyncModuleLoader that is associated with each load
     83 // request.
     84 class SyncLoadContext : public JS::loader::LoadContextBase {
     85 public:
     86  SyncLoadContext() : LoadContextBase(JS::loader::ContextKind::Sync) {}
     87 
     88 public:
     89  // The result of compiling a module script. These fields are used temporarily
     90  // before being passed to the module loader.
     91  nsresult mRv;
     92 
     93  // The exception thrown during compiling a module script. These fields are
     94  // used temporarily before being passed to the module loader.
     95  JS::PersistentRooted<JS::Value> mExceptionValue;
     96 
     97  JS::PersistentRooted<JSScript*> mScript;
     98 };
     99 
    100 }  // namespace loader
    101 }  // namespace mozilla
    102 
    103 #endif  // mozilla_loader_SyncModuleLoader_h