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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NGLayoutOpportunityTreeNode_h | 5 #ifndef NGLayoutOpportunityTreeNode_h |
6 #define NGLayoutOpportunityTreeNode_h | 6 #define NGLayoutOpportunityTreeNode_h |
7 | 7 |
8 #include "core/layout/ng/ng_units.h" | 8 #include "core/layout/ng/ng_units.h" |
9 #include "platform/heap/Handle.h" | 9 #include "platform/heap/Handle.h" |
10 | 10 |
11 namespace blink { | 11 namespace blink { |
12 | 12 |
13 | |
14 // 3 node R-Tree that represents available space(left, bottom, right) or | 13 // 3 node R-Tree that represents available space(left, bottom, right) or |
15 // layout opportunity after the parent spatial rectangle is split by the | 14 // layout opportunity after the parent spatial rectangle is split by the |
16 // exclusion rectangle. | 15 // exclusion rectangle. |
17 struct CORE_EXPORT NGLayoutOpportunityTreeNode | 16 struct CORE_EXPORT NGLayoutOpportunityTreeNode |
18 : public GarbageCollected<NGLayoutOpportunityTreeNode> { | 17 : public GarbageCollected<NGLayoutOpportunityTreeNode> { |
19 public: | 18 public: |
20 // Default constructor. | 19 // Default constructor. |
21 // Creates a Layout Opportunity tree node that is limited by it's own edge | 20 // Creates a Layout Opportunity tree node that is limited by it's own edge |
22 // from above. | 21 // from above. |
23 // @param opportunity The layout opportunity for this node. | 22 // @param opportunity The layout opportunity for this node. |
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45 | 44 |
46 // Whether this node is a leaf node. | 45 // Whether this node is a leaf node. |
47 // The node is a leaf if it doesn't have an exclusion that splits it apart. | 46 // The node is a leaf if it doesn't have an exclusion that splits it apart. |
48 bool IsLeafNode() const { return !exclusion; } | 47 bool IsLeafNode() const { return !exclusion; } |
49 | 48 |
50 DECLARE_TRACE(); | 49 DECLARE_TRACE(); |
51 }; | 50 }; |
52 | 51 |
53 } // namespace blink | 52 } // namespace blink |
54 #endif // NGLayoutOpportunityTreeNode_h | 53 #endif // NGLayoutOpportunityTreeNode_h |
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