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1 /* | 1 /* |
2 * Copyright (C) 2013 Apple Inc. All rights reserved. | 2 * Copyright (C) 2013 Apple Inc. All rights reserved. |
3 * Copyright (C) 2014 Samsung Electronics. All rights reserved. | 3 * Copyright (C) 2014 Samsung Electronics. All rights reserved. |
4 * | 4 * |
5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
6 * modification, are permitted provided that the following conditions are | 6 * modification, are permitted provided that the following conditions are |
7 * met: | 7 * met: |
8 * | 8 * |
9 * * Redistributions of source code must retain the above copyright | 9 * * Redistributions of source code must retain the above copyright |
10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 */ | 30 */ |
31 | 31 |
32 #ifndef CollectionIndexCache_h | 32 #ifndef CollectionIndexCache_h |
33 #define CollectionIndexCache_h | 33 #define CollectionIndexCache_h |
34 | 34 |
35 namespace blink { | 35 namespace blink { |
36 | 36 |
37 template <typename Collection, typename NodeType> | 37 template <typename Collection, typename NodeType> |
38 class CollectionIndexCache { | 38 class CollectionIndexCache { |
39 DISALLOW_ALLOCATION(); | 39 DISALLOW_NEW(); |
40 public: | 40 public: |
41 CollectionIndexCache(); | 41 CollectionIndexCache(); |
42 | 42 |
43 bool isEmpty(const Collection& collection) | 43 bool isEmpty(const Collection& collection) |
44 { | 44 { |
45 if (isCachedNodeCountValid()) | 45 if (isCachedNodeCountValid()) |
46 return !cachedNodeCount(); | 46 return !cachedNodeCount(); |
47 if (cachedNode()) | 47 if (cachedNode()) |
48 return false; | 48 return false; |
49 return !nodeAt(collection, 0); | 49 return !nodeAt(collection, 0); |
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198 setCachedNodeCount(currentIndex + 1); | 198 setCachedNodeCount(currentIndex + 1); |
199 return nullptr; | 199 return nullptr; |
200 } | 200 } |
201 setCachedNode(currentNode, currentIndex); | 201 setCachedNode(currentNode, currentIndex); |
202 return currentNode; | 202 return currentNode; |
203 } | 203 } |
204 | 204 |
205 } // namespace blink | 205 } // namespace blink |
206 | 206 |
207 #endif // CollectionIndexCache_h | 207 #endif // CollectionIndexCache_h |
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