Index: third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part.h |
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part.h b/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a4c66b84f0984aa9ba624a05ea27506c8870a059 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part.h |
@@ -0,0 +1,72 @@ |
+// 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 NGOutOfFlowLayoutPart_h |
+#define NGOutOfFlowLayoutPart_h |
+ |
+#include "core/CoreExport.h" |
+ |
+#include "core/layout/ng/ng_units.h" |
+#include "core/layout/ng/ng_constraint_space.h" |
+#include "core/layout/ng/ng_absolute_utils.h" |
+#include "core/layout/ng/ng_layout_algorithm.h" |
+#include "platform/heap/Handle.h" |
+#include "wtf/Optional.h" |
+ |
+namespace blink { |
+ |
+class ComputedStyle; |
+class NGBlockNode; |
+class NGFragmentBase; |
+class NGConstraintSpace; |
+ |
+// Helper class for positioning of out-of-flow blocks. |
+// It should be used together with NGFragmentBuilder. |
+// See NGFragmentBuilder::AddOutOfFlowChildCandidate documentation |
+// for example of using these classes together. |
+class CORE_EXPORT NGOutOfFlowLayoutPart |
+ : public GarbageCollectedFinalized<NGOutOfFlowLayoutPart> { |
+ public: |
+ NGOutOfFlowLayoutPart(PassRefPtr<const ComputedStyle>, NGLogicalSize); |
+ |
+ // If false, this fragment should be passed up the tree for layout by |
+ // an ancestor. |
+ bool StartLayout(NGBlockNode*, const NGStaticPosition&); |
+ NGLayoutStatus Layout(NGFragmentBase**, NGLogicalOffset*); |
+ |
+ DECLARE_TRACE(); |
+ |
+ private: |
+ bool ComputeInlineSizeEstimate(); |
+ bool ComputeBlockSizeEstimate(); |
+ bool ComputeNodeFragment(); |
+ |
+ bool contains_fixed_; |
+ bool contains_absolute_; |
+ |
+ enum State { |
+ kComputeInlineEstimate, |
+ kPartialPosition, |
+ kComputeBlockEstimate, |
+ kFullPosition, |
+ kGenerateFragment, |
+ kDone |
+ }; |
+ State state_; |
+ |
+ NGStaticPosition static_position_; |
+ NGLogicalOffset parent_offset_; |
+ NGPhysicalOffset parent_physical_offset_; |
+ Member<NGConstraintSpace> parent_space_; |
+ Member<NGBlockNode> node_; |
+ Member<NGConstraintSpace> node_space_; |
+ Member<NGFragmentBase> node_fragment_; |
+ NGAbsolutePhysicalPosition node_position_; |
+ Optional<LayoutUnit> inline_estimate_; |
+ Optional<LayoutUnit> block_estimate_; |
+}; |
+ |
+} // namespace blink |
+ |
+#endif |