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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_GEOMETRY_RESIZE_UTILS_H_
#define UI_GFX_GEOMETRY_RESIZE_UTILS_H_
#include <optional>
#include "base/component_export.h"
namespace gfx {
class Rect;
class Size;
enum class ResizeEdge {
kBottom,
kBottomLeft,
kBottomRight,
kLeft,
kRight,
kTop,
kTopLeft,
kTopRight
};
// Updates |rect| to adhere to the |aspect_ratio| of the window, if it has
// been set. |resize_edge| refers to the edge of the window being sized.
// |min_window_size| and |max_window_size| are expected to adhere to the
// given aspect ratio.
// |aspect_ratio| must be valid and is found using width / height.
void COMPONENT_EXPORT(GEOMETRY)
SizeRectToAspectRatio(ResizeEdge resize_edge,
float aspect_ratio,
const Size& min_window_size,
std::optional<Size> max_window_size,
Rect* rect);
// As above, but computes a size for `rect` such that it has the right aspect
// ratio after subtracting `excluded_margin` from it. This lets the aspect
// ratio ignore fixed borders, like a title bar. For example, if
// `excluded_margin` is (10, 5) and `aspect_ratio` is 1.0f, then the resulting
// rectangle might have a size of (30, 25) or (40, 35). One could use the
// margin for drawing in the edges, and the part that's left over would have the
// proper aspect ratio: 20/20 or 30/30, respectively.
void COMPONENT_EXPORT(GEOMETRY)
SizeRectToAspectRatioWithExcludedMargin(ResizeEdge resize_edge,
float aspect_ratio,
const Size& min_window_size,
std::optional<Size> max_window_size,
const Size& excluded_margin,
Rect& rect);
} // namespace gfx
#endif // UI_GFX_GEOMETRY_RESIZE_UTILS_H_
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