base/mac/cocoa_protocols.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef BASE_COCOA_PROTOCOLS_MAC_H_
   6 #define BASE_COCOA_PROTOCOLS_MAC_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9
  10 // New Mac OS X SDKs introduce new protocols used for delegates.  These
  11 // protocol defintions aren't not present in earlier releases of the Mac OS X
  12 // SDK.  In order to support building against the new SDK, which requires
  13 // delegates to conform to these protocols, and earlier SDKs, which do not
  14 // define these protocols at all, this file will provide empty protocol
  15 // definitions when used with earlier SDK versions.
  16
  17 #define DEFINE_EMPTY_PROTOCOL(p) \
  18 @protocol p \
  19 @end
  20
  21 #if !defined(MAC_OS_X_VERSION_10_7) || \
  22     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
  23
  24 DEFINE_EMPTY_PROTOCOL(NSDraggingDestination)
  25 DEFINE_EMPTY_PROTOCOL(ICCameraDeviceDownloadDelegate)
  26
  27 #endif  // MAC_OS_X_VERSION_10_7
  28
  29 #undef DEFINE_EMPTY_PROTOCOL
  30
  31 #endif  // BASE_COCOA_PROTOCOLS_MAC_H_