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 
AgentStyleSheets()52   SheetArray* AgentStyleSheets() { return &mSheets[AGENT_SHEET]; }
UserStyleSheets()53   SheetArray* UserStyleSheets() { return &mSheets[USER_SHEET]; }
AuthorStyleSheets()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
86