timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Apple Inc. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * |
| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| 14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| 17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 23 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 24 | */ |
| 25 | |
drousso@apple.com | 0b21e4c | 2017-08-02 03:09:57 +0000 | [diff] [blame] | 26 | WI.Revision = class Revision |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 27 | { |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 28 | // Public |
| 29 | |
joepeck@webkit.org | 861f3fe | 2015-03-20 00:18:15 +0000 | [diff] [blame] | 30 | apply() |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 31 | { |
| 32 | // Implemented by subclasses. |
| 33 | console.error("Needs to be implemented by a subclass."); |
joepeck@webkit.org | 861f3fe | 2015-03-20 00:18:15 +0000 | [diff] [blame] | 34 | } |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 35 | |
joepeck@webkit.org | 861f3fe | 2015-03-20 00:18:15 +0000 | [diff] [blame] | 36 | revert() |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 37 | { |
| 38 | // Implemented by subclasses. |
| 39 | console.error("Needs to be implemented by a subclass."); |
joepeck@webkit.org | 861f3fe | 2015-03-20 00:18:15 +0000 | [diff] [blame] | 40 | } |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 41 | |
joepeck@webkit.org | 861f3fe | 2015-03-20 00:18:15 +0000 | [diff] [blame] | 42 | copy() |
timothy@apple.com | 27b08c9 | 2013-06-11 19:16:26 +0000 | [diff] [blame] | 43 | { |
| 44 | // Override by subclasses. |
| 45 | return this; |
| 46 | } |
| 47 | }; |