1 files changed, 85 insertions, 0 deletions
diff --git a/layout/base/nsStyleSheetService.h b/layout/base/nsStyleSheetService.h
new file mode 100644
index 0000000000..83e1f16026
--- /dev/null
+++ b/layout/base/nsStyleSheetService.h
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* implementation of interface for managing user and user-agent style sheets */
+
+#ifndef nsStyleSheetService_h_
+#define nsStyleSheetService_h_
+
+#include "nsCOMArray.h"
+#include "nsCOMPtr.h"
+#include "nsIMemoryReporter.h"
+#include "nsIStyleSheetService.h"
+#include "mozilla/Array.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/StyleSheet.h"
+
+class nsICategoryManager;
+class nsIMemoryReporter;
+class nsISimpleEnumerator;
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+#define NS_STYLESHEETSERVICE_CID                     \
+  {                                                  \
+    0x3b55e72e, 0xab7e, 0x431b, {                    \
+      0x89, 0xc0, 0x3b, 0x06, 0xa8, 0xb1, 0x40, 0x16 \
+    }                                                \
+  }
+
+#define NS_STYLESHEETSERVICE_CONTRACTID \
+  "@mozilla.org/content/style-sheet-service;1"
+
+class nsStyleSheetService final : public nsIStyleSheetService,
+                                  public nsIMemoryReporter {
+ public:
+  typedef nsTArray<RefPtr<mozilla::StyleSheet>> SheetArray;
+
+  nsStyleSheetService();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSISTYLESHEETSERVICE
+  NS_DECL_NSIMEMORYREPORTER
+
+  nsresult Init();
+
+  SheetArray* AgentStyleSheets() { return &mSheets[AGENT_SHEET]; }
+  SheetArray* UserStyleSheets() { return &mSheets[USER_SHEET]; }
+  SheetArray* AuthorStyleSheets() { return &mSheets[AUTHOR_SHEET]; }
+
+  void RegisterPresShell(mozilla::PresShell* aPresShell);
+  void UnregisterPresShell(mozilla::PresShell* aPresShell);
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  static nsStyleSheetService* GetInstance();
+  static nsStyleSheetService* gInstance;
+
+ private:
+  ~nsStyleSheetService();
+
+  void RegisterFromEnumerator(nsICategoryManager* aManager,
+                              const char* aCategory,
+                              nsISimpleEnumerator* aEnumerator,
+                              uint32_t aSheetType);
+
+  int32_t FindSheetByURI(uint32_t aSheetType, nsIURI* aSheetURI);
+
+  // Like LoadAndRegisterSheet, but doesn't notify.  If successful, the
+  // new sheet will be the last sheet in mSheets[aSheetType].
+  nsresult LoadAndRegisterSheetInternal(nsIURI* aSheetURI, uint32_t aSheetType);
+
+  mozilla::Array<SheetArray, 3> mSheets;
+
+  // Registered PresShells that will be notified when sheets are added and
+  // removed from the style sheet service.
+  nsTArray<RefPtr<mozilla::PresShell>> mPresShells;
+};
+
+#endif