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105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
#pragma once
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#include <algorithm>
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#include <cmath>
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#include "common.hpp"
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POLYBAR_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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* between min_value and max_value
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*/
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template <typename ValueType, typename ReturnType = int>
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ReturnType unbounded_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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float percentage = (lower / upper) * 100.0f;
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if (std::is_integral<ReturnType>()) {
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return static_cast<ReturnType>(std::round(percentage));
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} else {
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return percentage;
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}
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}
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/**
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* Calculates percentage for a value and
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* clamps it to a percentage between 0 and 100
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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 raw_percentage = unbounded_percentage<ValueType, ReturnType>(value, min_value, max_value);
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return cap<ReturnType>(raw_percentage, 0.0f, 100.0f);
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}
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/**
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* Calculates percentage for a value and
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* clamps it to a percentage between 0 and 100
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*/
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template <typename ValueType, typename ReturnType = int>
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ReturnType percentage(ValueType value, ValueType max_value) {
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return percentage<ValueType, ReturnType>(value, max_value - max_value, max_value);
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}
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/**
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* Get value for signed percentage of `max_value` (cap between -max_value and max_value)
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*/
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template <typename ValueType, typename ReturnType = int>
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ReturnType signed_percentage_to_value(ValueType signed_percentage, ValueType max_value) {
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if (std::is_integral<ReturnType>())
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return cap<ReturnType>(signed_percentage * max_value / 100.0f + 0.5f, -max_value, max_value);
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else
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return cap<ReturnType>(signed_percentage * max_value / 100.0f, -max_value, max_value);
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}
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/**
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* Get value for percentage of `max_value` (cap between 0 and 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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* Get value for percentage of `min_value` to `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 min_value, ValueType max_value) {
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if (std::is_integral<ReturnType>())
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return cap<ReturnType>(percentage * (max_value - min_value) / 100.0f + 0.5f, 0, max_value - min_value) +
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min_value;
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else
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return cap<ReturnType>(percentage * (max_value - min_value) / 100.0f, 0.0f, max_value - min_value) + min_value;
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}
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template <typename ReturnType = int>
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ReturnType nearest_10(double value) {
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return static_cast<ReturnType>(static_cast<int>(value / 10.0 + 0.5) * 10.0);
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}
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template <typename ReturnType = int>
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ReturnType nearest_5(double value) {
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return static_cast<ReturnType>(static_cast<int>(value / 5.0 + 0.5) * 5.0);
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}
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inline int ceil(double value, int step = 1) {
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return static_cast<int>((value * 10 + step * 10 - 1) / (step * 10)) * step;
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}
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} // namespace math_util
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POLYBAR_NS_END
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