mirror of https://github.com/polybar/polybar.git
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
#pragma once
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#include <algorithm>
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#include "common.hpp"
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LEMONBUDDY_NS
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namespace math_util {
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/**
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* Limit value T by min and max bounds
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*/
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template <typename ValueType>
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ValueType cap(ValueType value, ValueType min_value, ValueType max_value) {
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value = std::min<ValueType>(value, max_value);
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value = std::max<ValueType>(value, min_value);
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return value;
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}
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/**
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* Calculate the percentage for a value
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* within given range
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*/
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template <typename ValueType, typename ReturnType = int>
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ReturnType percentage(ValueType value, ValueType min_value, ValueType max_value) {
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auto upper = (max_value - min_value);
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auto lower = static_cast<float>(value - min_value);
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ValueType percentage = (lower / upper) * 100.0f;
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if (std::is_integral<ReturnType>())
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percentage += 0.5f;
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return cap<ReturnType>(percentage, 0.0f, 100.0f);
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}
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/**
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* Get value for percentage of `max_value`
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*/
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template <typename ValueType, typename ReturnType = int>
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ReturnType percentage_to_value(ValueType percentage, ValueType max_value) {
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if (std::is_integral<ReturnType>())
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return cap<ReturnType>(percentage * max_value / 100.0f + 0.5f, 0, max_value);
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else
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return cap<ReturnType>(percentage * max_value / 100.0f, 0.0f, max_value);
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}
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}
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LEMONBUDDY_NS_END
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