| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef NGPhysicalFragmentBase_h |
| #define NGPhysicalFragmentBase_h |
| |
| #include "core/CoreExport.h" |
| #include "core/layout/ng/ng_constraint_space.h" |
| #include "platform/LayoutUnit.h" |
| #include "platform/heap/Handle.h" |
| #include "wtf/Vector.h" |
| |
| namespace blink { |
| |
| // The NGPhysicalFragmentBase contains the output information from layout. The |
| // fragment stores all of its information in the physical coordinate system for |
| // use by paint, hit-testing etc. |
| // |
| // Layout code should only access output layout information through the |
| // NGFragmentBase classes which transforms infromation into the logical |
| // coordinate system. |
| class CORE_EXPORT NGPhysicalFragmentBase |
| : public GarbageCollected<NGPhysicalFragmentBase> { |
| public: |
| enum NGFragmentType { FragmentBox = 0, FragmentText = 1 }; |
| |
| NGFragmentType Type() const { return static_cast<NGFragmentType>(type_); } |
| |
| // The accessors in this class shouldn't be used by layout code directly, |
| // instead should be accessed by the NGFragmentBase classes. These accessors |
| // exist for paint, hit-testing, etc. |
| |
| // Returns the border-box size. |
| NGPhysicalSize Size() const { return size_; } |
| LayoutUnit Width() const { return size_.width; } |
| LayoutUnit Height() const { return size_.height; } |
| |
| // Returns the total size, including the contents outside of the border-box. |
| LayoutUnit WidthOverflow() const { return overflow_.width; } |
| LayoutUnit HeightOverflow() const { return overflow_.height; } |
| |
| // Returns the offset relative to the parent fragement's content-box. |
| LayoutUnit LeftOffset() const { |
| DCHECK(has_been_placed_); |
| return offset_.left; |
| } |
| |
| LayoutUnit TopOffset() const { |
| DCHECK(has_been_placed_); |
| return offset_.top; |
| } |
| |
| // Should only be used by the parent fragement's layout. |
| void SetOffset(NGPhysicalOffset offset) { |
| DCHECK(!has_been_placed_); |
| offset_ = offset; |
| has_been_placed_ = true; |
| } |
| |
| DEFINE_INLINE_TRACE_AFTER_DISPATCH() {} |
| DECLARE_TRACE(); |
| |
| protected: |
| NGPhysicalFragmentBase(NGPhysicalSize size, |
| NGPhysicalSize overflow, |
| NGFragmentType type) |
| : size_(size), |
| overflow_(overflow), |
| type_(type), |
| has_been_placed_(false) {} |
| |
| NGPhysicalSize size_; |
| NGPhysicalSize overflow_; |
| NGPhysicalOffset offset_; |
| |
| unsigned type_ : 1; |
| unsigned has_been_placed_ : 1; |
| }; |
| |
| } // namespace blink |
| |
| #endif // NGFragmentBase_h |