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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 NGLayoutAlgorithm_h | 5 #ifndef NGLayoutAlgorithm_h |
6 #define NGLayoutAlgorithm_h | 6 #define NGLayoutAlgorithm_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
| 9 #include "core/layout/ng/ng_fragment_builder.h" |
9 #include "core/layout/ng/ng_min_max_content_size.h" | 10 #include "core/layout/ng/ng_min_max_content_size.h" |
10 #include "platform/wtf/Allocator.h" | 11 #include "platform/wtf/Allocator.h" |
11 #include "platform/wtf/Optional.h" | 12 #include "platform/wtf/Optional.h" |
12 | 13 |
13 namespace blink { | 14 namespace blink { |
14 | 15 |
15 class ComputedStyle; | 16 class ComputedStyle; |
16 class NGConstraintSpace; | 17 class NGConstraintSpace; |
17 class NGLayoutResult; | 18 class NGLayoutResult; |
18 | 19 |
19 // Base class for all LayoutNG algorithms. | 20 // Base class for all LayoutNG algorithms. |
20 template <typename NGInputNodeType, typename NGBreakTokenType> | 21 template <typename NGInputNodeType, typename NGBreakTokenType> |
21 class CORE_EXPORT NGLayoutAlgorithm { | 22 class CORE_EXPORT NGLayoutAlgorithm { |
22 STACK_ALLOCATED(); | 23 STACK_ALLOCATED(); |
23 public: | 24 public: |
24 NGLayoutAlgorithm(NGInputNodeType* node, | 25 NGLayoutAlgorithm(NGInputNodeType* node, |
25 NGConstraintSpace* space, | 26 NGConstraintSpace* space, |
26 NGBreakTokenType* break_token) | 27 NGBreakTokenType* break_token) |
27 : node_(node), constraint_space_(space), break_token_(break_token) {} | 28 : node_(node), |
| 29 constraint_space_(space), |
| 30 break_token_(break_token), |
| 31 container_builder_(NGPhysicalFragment::kFragmentBox, node) {} |
28 | 32 |
29 virtual ~NGLayoutAlgorithm() {} | 33 virtual ~NGLayoutAlgorithm() {} |
30 | 34 |
31 // Actual layout function. Lays out the children and descendants within the | 35 // Actual layout function. Lays out the children and descendants within the |
32 // constraints given by the NGConstraintSpace. Returns a layout result with | 36 // constraints given by the NGConstraintSpace. Returns a layout result with |
33 // the resulting layout information. | 37 // the resulting layout information. |
34 // TODO(layout-dev): attempt to make this function const. | 38 // TODO(layout-dev): attempt to make this function const. |
35 virtual RefPtr<NGLayoutResult> Layout() = 0; | 39 virtual RefPtr<NGLayoutResult> Layout() = 0; |
36 | 40 |
37 // Computes the min-content and max-content intrinsic sizes for the given box. | 41 // Computes the min-content and max-content intrinsic sizes for the given box. |
(...skipping 10 matching lines...) Expand all Loading... |
48 DCHECK(constraint_space_); | 52 DCHECK(constraint_space_); |
49 return *constraint_space_; | 53 return *constraint_space_; |
50 } | 54 } |
51 NGConstraintSpace* MutableConstraintSpace() { return constraint_space_; } | 55 NGConstraintSpace* MutableConstraintSpace() { return constraint_space_; } |
52 | 56 |
53 const ComputedStyle& Style() const { | 57 const ComputedStyle& Style() const { |
54 DCHECK(node_); | 58 DCHECK(node_); |
55 return node_->Style(); | 59 return node_->Style(); |
56 } | 60 } |
57 | 61 |
| 62 NGLogicalOffset ContainerBfcOffset() const { |
| 63 DCHECK(container_builder_.BfcOffset().has_value()); |
| 64 return container_builder_.BfcOffset().value(); |
| 65 } |
| 66 |
58 virtual NGInputNodeType* Node() const { return node_; } | 67 virtual NGInputNodeType* Node() const { return node_; } |
59 | 68 |
60 NGBreakTokenType* BreakToken() const { return break_token_; } | 69 NGBreakTokenType* BreakToken() const { return break_token_; } |
61 | 70 |
62 Persistent<NGInputNodeType> node_; | 71 Persistent<NGInputNodeType> node_; |
63 NGConstraintSpace* constraint_space_; | 72 NGConstraintSpace* constraint_space_; |
64 | 73 |
65 // The break token from which we are currently resuming layout. | 74 // The break token from which we are currently resuming layout. |
66 NGBreakTokenType* break_token_; | 75 NGBreakTokenType* break_token_; |
| 76 |
| 77 NGFragmentBuilder container_builder_; |
67 }; | 78 }; |
68 | 79 |
69 } // namespace blink | 80 } // namespace blink |
70 | 81 |
71 #endif // NGLayoutAlgorithm_h | 82 #endif // NGLayoutAlgorithm_h |
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