2a8ebc4906
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
#pragma once
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#include <mln/util/feature.hpp>
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#include <array>
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#include <span>
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namespace mln {
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// A set of four numbers representing padding around a box.
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struct Padding {
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// Empty/zero padding on all sides.
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Padding() = default;
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// Same padding on all sides.
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Padding(float value)
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: top(value),
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right(value),
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bottom(value),
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left(value) {}
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Padding(float t_, float r_, float b_, float l_)
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: top(t_),
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right(r_),
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bottom(b_),
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left(l_) {}
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// Padding values are in CSS order: top, right, bottom, left.
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Padding(const std::span<const float>& values) {
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switch (values.size()) {
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case 1:
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top = right = bottom = left = values[0];
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break;
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case 2:
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top = bottom = values[0];
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right = left = values[1];
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break;
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case 3:
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top = values[0];
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left = right = values[1];
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bottom = values[2];
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break;
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case 4:
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top = values[0];
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right = values[1];
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bottom = values[2];
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left = values[3];
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break;
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default:
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throw std::invalid_argument("Padding must have between 1 and 4 elements");
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}
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}
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float top = 0;
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float right = 0;
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float bottom = 0;
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float left = 0;
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explicit operator bool() const { return top != 0 || right != 0 || bottom != 0 || left != 0; }
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bool operator==(const Padding&) const = default;
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std::array<float, 4> toArray() const;
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// Used by ValueFactory<Padding>::make()
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mln::Value serialize() const;
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};
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inline Padding operator*(const Padding& padding, float scale) {
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return {padding.top * scale, padding.right * scale, padding.bottom * scale, padding.left * scale};
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}
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} // namespace mln
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