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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef NGBlockLayoutAlgorithm_h | |
6 #define NGBlockLayoutAlgorithm_h | |
7 | |
8 #include "wtf/RefPtr.h" | |
9 | |
10 namespace blink { | |
11 | |
12 class ComputedStyle; | |
13 class LayoutBox; | |
14 class NGConstraintSpace; | |
15 class NGFragment; | |
16 | |
17 // A class for general block layout (e.g. a <div> with no special style). | |
18 // Lays out the children in sequence. | |
19 class NGBlockLayoutAlgorithm { | |
20 public: | |
21 NGBlockLayoutAlgorithm(const ComputedStyle*); | |
22 | |
23 // Actual layout implementation. Lays out the children in sequence within | |
24 // the constraints given by the NGConstraintSpace. Returns a fragment | |
25 // with the resulting layout information. | |
26 // This function can not be const because for interruptible layout, we have | |
27 // to be able to store state information. | |
28 NGFragment* layout(const NGConstraintSpace&); | |
29 private: | |
30 RefPtr<const ComputedStyle> m_style; | |
31 }; | |
32 | |
33 } // namespace blink | |
34 | |
35 #endif // NGBlockLayoutAlgorithm_h | |
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