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// 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 THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_MIN_MAX_SIZES_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_MIN_MAX_SIZES_H_
#include <algorithm>
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/geometry/layout_unit.h"
namespace blink {
// A struct that holds a pair of two sizes, a "min" size and a "max" size.
// Useful for holding a {min,max}-content size pair or a
// {min,max}-{width,height}.
struct CORE_EXPORT MinMaxSizes {
LayoutUnit min_size;
LayoutUnit max_size;
// Make sure that our min/max sizes are at least as large as |other|.
void Encompass(const MinMaxSizes& other) {
min_size = std::max(min_size, other.min_size);
max_size = std::max(max_size, other.max_size);
}
// Make sure that our min/max sizes are at least as large as |value|.
void Encompass(LayoutUnit value) {
min_size = std::max(min_size, value);
max_size = std::max(max_size, value);
}
// Make sure that our min/max sizes aren't larger than |value|.
void Constrain(LayoutUnit value) {
min_size = std::min(min_size, value);
max_size = std::min(max_size, value);
}
// Interprets the sizes as a min-content/max-content pair and computes the
// "shrink-to-fit" size based on them for the given available size.
LayoutUnit ShrinkToFit(LayoutUnit available_size) const {
DCHECK_GE(max_size, min_size);
return std::min(max_size, std::max(min_size, available_size));
}
// Interprets the sizes as a {min-max}-size pair and clamps the given input
// size to that.
LayoutUnit ClampSizeToMinAndMax(LayoutUnit size) const {
return std::max(min_size, std::min(size, max_size));
}
bool operator==(const MinMaxSizes& other) const {
return min_size == other.min_size && max_size == other.max_size;
}
void operator=(LayoutUnit value) { min_size = max_size = value; }
MinMaxSizes& operator+=(MinMaxSizes extra) {
min_size += extra.min_size;
max_size += extra.max_size;
return *this;
}
MinMaxSizes& operator+=(const LayoutUnit length) {
min_size += length;
max_size += length;
return *this;
}
MinMaxSizes& operator-=(const LayoutUnit length) {
min_size -= length;
max_size -= length;
return *this;
}
};
CORE_EXPORT std::ostream& operator<<(std::ostream&, const MinMaxSizes&);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_MIN_MAX_SIZES_H_
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