[LayoutNG] Logicalize NGPaintBorderEdge

third_party/WebKit/Source/core/layout/ng/geometry/ng_border_edges.cc

Index: third_party/WebKit/Source/core/layout/ng/geometry/ng_border_edges.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/geometry/ng_border_edges.cc b/third_party/WebKit/Source/core/layout/ng/geometry/ng_border_edges.cc
new file mode 100644
index 0000000000000000000000000000000000000000..648f56310ef5bdd117ec55e4bbc64e159859b7f3
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ng/geometry/ng_border_edges.cc
@@ -0,0 +1,52 @@
+// Copyright 2017 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.
+
+#include "core/layout/ng/geometry/ng_border_edges.h"
+
+namespace blink {
+
+namespace NGBorderEdges {
+
+Physical ToPhysical(Logical logical_edges, NGWritingMode writing_mode) {
+  static_assert(kBlockStart == static_cast<Logical>(kTop) &&
+                    kBlockEnd == static_cast<Logical>(kBottom) &&
+                    kLineLeft == static_cast<Logical>(kLeft) &&
+                    kLineRight == static_cast<Logical>(kRight),
+                "Physical and Logical must match");
+
+  if (writing_mode == kHorizontalTopBottom || logical_edges == kAll)
+    return static_cast<Physical>(logical_edges);
+
+  if (writing_mode != kSidewaysLeftRight) {
+    return static_cast<Physical>((logical_edges & kBlockStart ? kRight : 0) |
+                                 (logical_edges & kBlockEnd ? kLeft : 0) |
+                                 (logical_edges & kLineLeft ? kTop : 0) |
+                                 (logical_edges & kLineRight ? kBottom : 0));
+  }
+  return static_cast<Physical>((logical_edges & kBlockStart ? kLeft : 0) |
+                               (logical_edges & kBlockEnd ? kRight : 0) |
+                               (logical_edges & kLineLeft ? kBottom : 0) |
+                               (logical_edges & kLineRight ? kTop : 0));
+}
+
+Logical ToLogical(Physical physical_edges, NGWritingMode writing_mode) {
+  if (writing_mode == kHorizontalTopBottom ||
+      physical_edges == static_cast<Physical>(kAll))
+    return static_cast<Logical>(physical_edges);
+
+  if (writing_mode != kSidewaysLeftRight) {
+    return static_cast<Logical>((physical_edges & kTop ? kLineLeft : 0) |
+                                (physical_edges & kBottom ? kLineRight : 0) |
+                                (physical_edges & kLeft ? kBlockEnd : 0) |
+                                (physical_edges & kRight ? kBlockStart : 0));
+  }
+  return static_cast<Logical>((physical_edges & kTop ? kLineRight : 0) |
+                              (physical_edges & kBottom ? kLineLeft : 0) |
+                              (physical_edges & kLeft ? kBlockStart : 0) |
+                              (physical_edges & kRight ? kBlockEnd : 0));
+}
+
+}  // namespace NGBorderEdges
+
+}  // namespace blink