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// 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.
#ifndef NGSpaceUtils_h
#define NGSpaceUtils_h
#include "base/memory/scoped_refptr.h"
#include "base/optional.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/layout/ng/ng_layout_input_node.h"
#include "third_party/blink/renderer/platform/geometry/layout_unit.h"
namespace blink {
class ComputedStyle;
struct NGBfcOffset;
// Adjusts {@code offset} to the clearance line.
CORE_EXPORT bool AdjustToClearance(LayoutUnit clearance_offset,
NGBfcOffset* offset);
// Create a child constraint space with no sizing data, except for fallback
// inline sizing for orthongonal flow roots. This will not and can not be used
// for final layout, but is needed in an intermediate measure pass that
// calculates the min/max size contribution from a child that establishes an
// orthogonal flow root.
NGConstraintSpace CreateIndefiniteConstraintSpaceForChild(
const ComputedStyle& container_style,
NGLayoutInputNode child);
// Calculate and set the available inline fallback size for orthogonal flow
// children. This size will be used if it's not resolvable via other means [1].
//
// TODO(mstensho): The spec [1] says to use the size of the nearest scrollport
// as constraint, if that's smaller than the initial containing block, but we
// haven't implemented that yet; we always just use the initial containing
// block size.
//
// [1] https://www.w3.org/TR/css-writing-modes-3/#orthogonal-auto
void SetOrthogonalFallbackInlineSizeIfNeeded(const ComputedStyle& parent_style,
const NGLayoutInputNode child,
NGConstraintSpaceBuilder* builder);
} // namespace blink
#endif // NGSpaceUtils_h
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