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| 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_MAC_COCOA_PROTOCOLS_H_ | |
| 6 #define BASE_MAC_COCOA_PROTOCOLS_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_MAC_COCOA_PROTOCOLS_H_ | |
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