/* -*- 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 nsIPresShell;

class nsISimpleEnumerator;

#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(nsIPresShell* aPresShell);

  void UnregisterPresShell(nsIPresShell* 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<nsCOMPtr<nsIPresShell>> mPresShells;

};

#endif