/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#ifndef nsClipboard_h_
#define nsClipboard_h_

#include "nsBaseClipboard.h"
#include "nsCOMPtr.h"
#include "nsIClipboard.h"
#include "nsString.h"
#include "mozilla/Maybe.h"
#include "mozilla/StaticPtr.h"

#import <Cocoa/Cocoa.h>

class nsITransferable;

class nsClipboard : public nsBaseClipboard {
 public:
  nsClipboard();

  NS_DECL_ISUPPORTS_INHERITED

  // nsIClipboard
  NS_IMETHOD SetData(nsITransferable* aTransferable, nsIClipboardOwner* anOwner,
                     int32_t aWhichClipboard) override;
  NS_IMETHOD HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard,
                                    bool* _retval) override;
  NS_IMETHOD IsClipboardTypeSupported(int32_t aWhichClipboard, bool* _retval) override;
  NS_IMETHOD EmptyClipboard(int32_t aWhichClipboard) override;

  // On macOS, cache the transferable of the current selection (chrome/content)
  // in the parent process. This is needed for the services menu which
  // requires synchronous access to the current selection.
  static mozilla::StaticRefPtr<nsITransferable> sSelectionCache;

  // Helper methods, used also by nsDragService
  static NSDictionary* PasteboardDictFromTransferable(nsITransferable* aTransferable);
  // aPasteboardType is being retained and needs to be released by the caller.
  static bool IsStringType(const nsCString& aMIMEType, NSString** aPasteboardType);
  static bool IsImageType(const nsACString& aMIMEType);
  static NSString* WrapHtmlForSystemPasteboard(NSString* aString);
  static nsresult TransferableFromPasteboard(nsITransferable* aTransferable, NSPasteboard* pboard);

 protected:
  // impelement the native clipboard behavior
  NS_IMETHOD SetNativeClipboardData(int32_t aWhichClipboard) override;
  NS_IMETHOD GetNativeClipboardData(nsITransferable* aTransferable,
                                    int32_t aWhichClipboard) override;
  void ClearSelectionCache();
  void SetSelectionCache(nsITransferable* aTransferable);

 private:
  virtual ~nsClipboard();

  static mozilla::Maybe<uint32_t> FindIndexOfImageFlavor(const nsTArray<nsCString>& aMIMETypes);

  int32_t mCachedClipboard;
  int32_t mChangeCount;  // Set to the native change count after any modification of the clipboard.
};

#endif  // nsClipboard_h_