layout/base/nsStyleSheetService.h

   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 /* implementation of interface for managing user and user-agent style sheets */
   8
   9 #ifndef nsStyleSheetService_h_
  10 #define nsStyleSheetService_h_
  11
  12 #include "nsCOMArray.h"
  13 #include "nsCOMPtr.h"
  14 #include "nsIMemoryReporter.h"
  15 #include "nsIStyleSheetService.h"
  16 #include "mozilla/Array.h"
  17 #include "mozilla/Attributes.h"
  18 #include "mozilla/MemoryReporting.h"
  19 #include "mozilla/StyleSheet.h"
  20
  21 class nsICategoryManager;
  22 class nsIMemoryReporter;
  23 class nsISimpleEnumerator;
  24
  25 namespace mozilla {
  26 class PresShell;
  27 }  // namespace mozilla
  28
  29 #define NS_STYLESHEETSERVICE_CID                     \
  30   {                                                  \
  31     0x3b55e72e, 0xab7e, 0x431b, {                    \
  32       0x89, 0xc0, 0x3b, 0x06, 0xa8, 0xb1, 0x40, 0x16 \
  33     }                                                \
  34   }
  35
  36 #define NS_STYLESHEETSERVICE_CONTRACTID \
  37   "@mozilla.org/content/style-sheet-service;1"
  38
  39 class nsStyleSheetService final : public nsIStyleSheetService,
  40                                   public nsIMemoryReporter {
  41  public:
  42   typedef nsTArray<RefPtr<mozilla::StyleSheet>> SheetArray;
  43
  44   nsStyleSheetService();
  45
  46   NS_DECL_ISUPPORTS
  47   NS_DECL_NSISTYLESHEETSERVICE
  48   NS_DECL_NSIMEMORYREPORTER
  49
  50   nsresult Init();
  51
  52   SheetArray* AgentStyleSheets() { return &mSheets[AGENT_SHEET]; }
  53   SheetArray* UserStyleSheets() { return &mSheets[USER_SHEET]; }
  54   SheetArray* AuthorStyleSheets() { return &mSheets[AUTHOR_SHEET]; }
  55
  56   void RegisterPresShell(mozilla::PresShell* aPresShell);
  57   void UnregisterPresShell(mozilla::PresShell* aPresShell);
  58
  59   size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
  60
  61   static nsStyleSheetService* GetInstance();
  62   static nsStyleSheetService* gInstance;
  63
  64  private:
  65   ~nsStyleSheetService();
  66
  67   void RegisterFromEnumerator(nsICategoryManager* aManager,
  68                               const char* aCategory,
  69                               nsISimpleEnumerator* aEnumerator,
  70                               uint32_t aSheetType);
  71
  72   int32_t FindSheetByURI(uint32_t aSheetType, nsIURI* aSheetURI);
  73
  74   // Like LoadAndRegisterSheet, but doesn't notify.  If successful, the
  75   // new sheet will be the last sheet in mSheets[aSheetType].
  76   nsresult LoadAndRegisterSheetInternal(nsIURI* aSheetURI, uint32_t aSheetType);
  77
  78   mozilla::Array<SheetArray, 3> mSheets;
  79
  80   // Registered PresShells that will be notified when sheets are added and
  81   // removed from the style sheet service.
  82   nsTArray<RefPtr<mozilla::PresShell>> mPresShells;
  83 };
  84
  85 #endif