tor-browser

The Tor Browser
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PreloadedStyleSheet.h (1993B)

      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 /* a CSS style sheet returned from nsIStyleSheetService.preloadSheet */
      8 
      9 #ifndef mozilla_PreloadedStyleSheet_h
     10 #define mozilla_PreloadedStyleSheet_h
     11 
     12 #include "mozilla/NotNull.h"
     13 #include "mozilla/Result.h"
     14 #include "mozilla/css/SheetParsingMode.h"
     15 #include "nsCOMPtr.h"
     16 #include "nsCycleCollectionParticipant.h"
     17 #include "nsICSSLoaderObserver.h"
     18 #include "nsIPreloadedStyleSheet.h"
     19 
     20 class nsIURI;
     21 
     22 namespace mozilla {
     23 namespace dom {
     24 class Promise;
     25 }
     26 
     27 class StyleSheet;
     28 
     29 class PreloadedStyleSheet : public nsIPreloadedStyleSheet {
     30 public:
     31  PreloadedStyleSheet(nsIURI*, css::SheetParsingMode);
     32 
     33  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
     34  NS_DECL_CYCLE_COLLECTION_CLASS(PreloadedStyleSheet)
     35 
     36  Result<StyleSheet*, nsresult> GetSheet();
     37 
     38  nsresult Preload();
     39  nsresult PreloadAsync(NotNull<dom::Promise*> aPromise);
     40 
     41 protected:
     42  virtual ~PreloadedStyleSheet() = default;
     43 
     44 private:
     45  class StylesheetPreloadObserver final : public nsICSSLoaderObserver {
     46   public:
     47    NS_DECL_ISUPPORTS
     48 
     49    explicit StylesheetPreloadObserver(NotNull<dom::Promise*> aPromise,
     50                                       PreloadedStyleSheet* aSheet)
     51        : mPromise(aPromise), mPreloadedSheet(aSheet) {}
     52 
     53    NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet, bool aWasDeferred,
     54                                nsresult aStatus) override;
     55 
     56   protected:
     57    virtual ~StylesheetPreloadObserver() = default;
     58 
     59   private:
     60    RefPtr<dom::Promise> mPromise;
     61    RefPtr<PreloadedStyleSheet> mPreloadedSheet;
     62  };
     63 
     64  RefPtr<StyleSheet> mSheet;
     65 
     66  bool mLoaded;
     67  nsCOMPtr<nsIURI> mURI;
     68  css::SheetParsingMode mParsingMode;
     69 };
     70 
     71 }  // namespace mozilla
     72 
     73 #endif  // mozilla_PreloadedStyleSheet_h