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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 NGPhysicalFragment_h | 5 #ifndef NGPhysicalFragment_h |
6 #define NGPhysicalFragment_h | 6 #define NGPhysicalFragment_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "core/layout/ng/ng_physical_fragment_base.h" | |
10 #include "core/layout/ng/ng_units.h" | 9 #include "core/layout/ng/ng_units.h" |
| 10 #include "platform/LayoutUnit.h" |
11 #include "platform/heap/Handle.h" | 11 #include "platform/heap/Handle.h" |
| 12 #include "wtf/Vector.h" |
12 | 13 |
13 namespace blink { | 14 namespace blink { |
14 | 15 |
15 class NGBlockNode; | 16 class NGBlockNode; |
| 17 class NGBreakToken; |
16 | 18 |
17 class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase { | 19 // The NGPhysicalFragmentBase contains the output information from layout. The |
| 20 // fragment stores all of its information in the physical coordinate system for |
| 21 // use by paint, hit-testing etc. |
| 22 // |
| 23 // Layout code should only access output layout information through the |
| 24 // NGFragmentBase classes which transforms information into the logical |
| 25 // coordinate system. |
| 26 class CORE_EXPORT NGPhysicalFragment |
| 27 : public GarbageCollectedFinalized<NGPhysicalFragment> { |
18 public: | 28 public: |
19 // This modifies the passed-in children vector. | 29 enum NGFragmentType { kFragmentBox = 0, kFragmentText = 1 }; |
| 30 |
| 31 NGFragmentType Type() const { return static_cast<NGFragmentType>(type_); } |
| 32 |
| 33 // The accessors in this class shouldn't be used by layout code directly, |
| 34 // instead should be accessed by the NGFragmentBase classes. These accessors |
| 35 // exist for paint, hit-testing, etc. |
| 36 |
| 37 // Returns the border-box size. |
| 38 NGPhysicalSize Size() const { return size_; } |
| 39 LayoutUnit Width() const { return size_.width; } |
| 40 LayoutUnit Height() const { return size_.height; } |
| 41 |
| 42 // Returns the total size, including the contents outside of the border-box. |
| 43 LayoutUnit WidthOverflow() const { return overflow_.width; } |
| 44 LayoutUnit HeightOverflow() const { return overflow_.height; } |
| 45 |
| 46 // Returns the offset relative to the parent fragement's content-box. |
| 47 LayoutUnit LeftOffset() const { |
| 48 DCHECK(has_been_placed_); |
| 49 return offset_.left; |
| 50 } |
| 51 |
| 52 LayoutUnit TopOffset() const { |
| 53 DCHECK(has_been_placed_); |
| 54 return offset_.top; |
| 55 } |
| 56 |
| 57 // Should only be used by the parent fragement's layout. |
| 58 void SetOffset(NGPhysicalOffset offset) { |
| 59 DCHECK(!has_been_placed_); |
| 60 offset_ = offset; |
| 61 has_been_placed_ = true; |
| 62 } |
| 63 |
| 64 const HeapLinkedHashSet<WeakMember<NGBlockNode>>& OutOfFlowDescendants() |
| 65 const { |
| 66 return out_of_flow_descendants_; |
| 67 } |
| 68 |
| 69 const Vector<NGStaticPosition>& OutOfFlowPositions() const { |
| 70 return out_of_flow_positions_; |
| 71 } |
| 72 |
| 73 DECLARE_TRACE_AFTER_DISPATCH(); |
| 74 DECLARE_TRACE(); |
| 75 |
| 76 void finalizeGarbageCollectedObject(); |
| 77 |
| 78 protected: |
20 NGPhysicalFragment( | 79 NGPhysicalFragment( |
21 NGPhysicalSize size, | 80 NGPhysicalSize size, |
22 NGPhysicalSize overflow, | 81 NGPhysicalSize overflow, |
23 HeapVector<Member<const NGPhysicalFragmentBase>>& children, | 82 NGFragmentType type, |
24 HeapLinkedHashSet<WeakMember<NGBlockNode>>& out_of_flow_descendants, | 83 HeapLinkedHashSet<WeakMember<NGBlockNode>>& out_of_flow_descendants, |
25 Vector<NGStaticPosition>& out_of_flow_positions, | 84 Vector<NGStaticPosition> out_of_flow_positions, |
26 NGMarginStrut margin_strut); | 85 NGBreakToken* break_token = nullptr); |
27 | 86 |
28 const HeapVector<Member<const NGPhysicalFragmentBase>>& Children() const { | 87 NGPhysicalSize size_; |
29 return children_; | 88 NGPhysicalSize overflow_; |
30 } | 89 NGPhysicalOffset offset_; |
| 90 Member<NGBreakToken> break_token_; |
| 91 HeapLinkedHashSet<WeakMember<NGBlockNode>> out_of_flow_descendants_; |
| 92 Vector<NGStaticPosition> out_of_flow_positions_; |
31 | 93 |
32 NGMarginStrut MarginStrut() const { return margin_strut_; } | 94 unsigned type_ : 1; |
33 | 95 unsigned has_been_placed_ : 1; |
34 DECLARE_TRACE_AFTER_DISPATCH(); | |
35 | |
36 private: | |
37 HeapVector<Member<const NGPhysicalFragmentBase>> children_; | |
38 NGMarginStrut margin_strut_; | |
39 }; | 96 }; |
40 | 97 |
41 WILL_NOT_BE_EAGERLY_TRACED_CLASS(NGPhysicalFragment); | |
42 | |
43 DEFINE_TYPE_CASTS(NGPhysicalFragment, | |
44 NGPhysicalFragmentBase, | |
45 fragment, | |
46 fragment->Type() == NGPhysicalFragmentBase::kFragmentBox, | |
47 fragment.Type() == NGPhysicalFragmentBase::kFragmentBox); | |
48 | |
49 } // namespace blink | 98 } // namespace blink |
50 | 99 |
51 #endif // NGPhysicalFragment_h | 100 #endif // NGPhysicalFragment_h |
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