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