Index: third_party/WebKit/Source/core/layout/ng/ng_layout_algorithm.h |
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_layout_algorithm.h b/third_party/WebKit/Source/core/layout/ng/ng_layout_algorithm.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b77f270ad86a55dfe7ae3c9ba9181acd5b592779 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/layout/ng/ng_layout_algorithm.h |
@@ -0,0 +1,35 @@ |
+// 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 NGLayoutAlgorithm_h |
+#define NGLayoutAlgorithm_h |
+ |
+#include "core/CoreExport.h" |
+#include "wtf/Allocator.h" |
+#include "wtf/Noncopyable.h" |
+ |
+namespace blink { |
+ |
+class NGConstraintSpace; |
+class NGFragment; |
+ |
+// Base class for all LayoutNG algorithms. |
+class CORE_EXPORT NGLayoutAlgorithm { |
+ WTF_MAKE_NONCOPYABLE(NGLayoutAlgorithm); |
+ USING_FAST_MALLOC(NGLayoutAlgorithm); |
+ |
+ public: |
+ NGLayoutAlgorithm() {} |
+ |
+ // Actual layout function. Lays out the children and descendents within the |
+ // constraints given by the NGConstraintSpace. Returns a fragment with the |
+ // resulting layout information. |
+ // This function can not be const because for interruptible layout, we have |
+ // to be able to store state information. |
+ virtual NGFragment* layout(const NGConstraintSpace&) = 0; |
+}; |
+ |
+} // namespace blink |
+ |
+#endif // NGLayoutAlgorithm_h |