[LayoutNG] Add NGConstraintSpace class definition

third_party/WebKit/Source/core/layout/ng/NGConstraintSpace.cpp

+// 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/NGConstraintSpace.h"
+
+namespace blink {
+
+NGConstraintSpace::NGConstraintSpace(LayoutUnit inlineSize,
+    LayoutUnit blockSize)
+{
+    m_inlineSize = inlineSize;
+    m_blockSize = blockSize;
+    m_inlineOverflowSize = LayoutUnit(-1);
+    m_blockOverflowSize = LayoutUnit(-1);
+    m_fixedInlineSize = 0;
+    m_fixedBlockSize = 0;
+    m_blockFragmentationType = FragmentNone;
+}
+
+void NGConstraintSpace::addExclusion(const NGExclusion exclusion,
+    unsigned options)
+{
+
+}
+
+void NGConstraintSpace::setOverflowSize(LayoutUnit inlineSize,
+    LayoutUnit blockSize)
+{
+    m_inlineOverflowSize = inlineSize;
+    m_blockOverflowSize = blockSize;
+}
+
+void NGConstraintSpace::setFixedSize(bool inlineFixed, bool blockFixed)
+{
+    m_fixedInlineSize = inlineFixed;
+    m_fixedBlockSize = blockFixed;
+}
+
+void NGConstraintSpace::setFragmentationType(NGFragmentationType type)
+{
+    m_blockFragmentationType = type;
+}
+
+DoublyLinkedList<const NGExclusion> NGConstraintSpace::exclusions(
+    unsigned options) const
+{
+    DoublyLinkedList<const NGExclusion> exclusions;
+    // TODO(eae): Implement.
+    return exclusions;
+}
+
+NGLayoutOpportunityIterator NGConstraintSpace::layoutOpportunities(
+    unsigned clear, NGExclusionType avoid) const
+{
+    // TODO(eae): Implement.
+    NGLayoutOpportunityIterator iterator(this, clear, avoid);
+    return iterator;
+}
+
+} // namespace blink