[LayoutNG] Introduces NGPhysicalConstraintSpace and makes NGConstraintSpace a "view".

third_party/WebKit/Source/core/layout/ng/ng_derived_constraint_space.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_derived_constraint_space.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_derived_constraint_space.cc b/third_party/WebKit/Source/core/layout/ng/ng_derived_constraint_space.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a03ecbf142343fabd6415b20d844e0eec4c358b6
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ng/ng_derived_constraint_space.cc
@@ -0,0 +1,51 @@
+// 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.
+
+#include "core/layout/ng/ng_derived_constraint_space.h"
+
+#include "core/layout/LayoutBox.h"
+#include "core/style/ComputedStyle.h"
+
+namespace blink {
+
+NGDerivedConstraintSpace* NGDerivedConstraintSpace::CreateFromLayoutObject(
+    const LayoutBox& box) {
+  bool fixed_inline = false, fixed_block = false;
+  // XXX for orthogonal writing mode this is not right
+  LayoutUnit container_logical_width =
+      std::max(LayoutUnit(), box.containingBlockLogicalWidthForContent());
+  // XXX Make sure this height is correct
+  LayoutUnit container_logical_height =
+      box.containingBlockLogicalHeightForContent(ExcludeMarginBorderPadding);
+  if (box.hasOverrideLogicalContentWidth()) {
+    container_logical_width = box.overrideLogicalContentWidth();
+    fixed_inline = true;
+  }
+  if (box.hasOverrideLogicalContentHeight()) {
+    container_logical_width = box.overrideLogicalContentHeight();
+    fixed_block = true;
+  }
+
+  return new NGDerivedConstraintSpace(
+      FromPlatformWritingMode(box.styleRef().getWritingMode()),
+      NGLogicalSize(container_logical_width, container_logical_height),
+      box.styleRef().overflowInlineDirection() == OverflowAuto,
+      box.styleRef().overflowBlockDirection() == OverflowAuto, fixed_inline,
+      fixed_block, FragmentNone);
+}
+
+NGDerivedConstraintSpace::NGDerivedConstraintSpace(NGWritingMode writing_mode,
+                                                   NGLogicalSize container_size,
+                                                   bool inline_triggers,
+                                                   bool block_triggers,
+                                                   bool fixed_inline,
+                                                   bool fixed_block,
+                                                   NGFragmentationType type)
+    : NGConstraintSpace(writing_mode, container_size), direction_(LeftToRight) {
+  SetOverflowTriggersScrollbar(inline_triggers, block_triggers);
+  SetFixedSize(fixed_inline, fixed_block);
+  SetFragmentationType(type);
+}
+
+}  // namespace blink