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 // GTM also maintains a list of empty protocols, but only the ones the library
  11 // requires. Augment that below.
  12 #import "third_party/google_toolbox_for_mac/src/GTMDefines.h"
  13
  14 // New Mac OS X SDKs introduce new protocols used for delegates.  These
  15 // protocol defintions aren't not present in earlier releases of the Mac OS X
  16 // SDK.  In order to support building against the new SDK, which requires
  17 // delegates to conform to these protocols, and earlier SDKs, which do not
  18 // define these protocols at all, this file will provide empty protocol
  19 // definitions when used with earlier SDK versions.
  20
  21 #define DEFINE_EMPTY_PROTOCOL(p) \
  22 @protocol p \
  23 @end
  24
  25 #if !defined(MAC_OS_X_VERSION_10_7) || \
  26     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
  27
  28 DEFINE_EMPTY_PROTOCOL(NSDraggingDestination)
  29 DEFINE_EMPTY_PROTOCOL(ICCameraDeviceDownloadDelegate)
  30
  31 #endif  // MAC_OS_X_VERSION_10_7
  32
  33 #undef DEFINE_EMPTY_PROTOCOL
  34
  35 #endif  // BASE_COCOA_PROTOCOLS_MAC_H_