File indexing completed on 2024-05-12 09:41:26

 /*
  *   SPDX-FileCopyrightText: 2014 Nikita Skovoroda <chalkerx@gmail.com>
  *
  *   SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "powerdevilbrightnesslogic.h"
 #include "powerdevilbackendinterface.h"
 
 #include <QDebug>
 
 namespace PowerDevil
 {
 BrightnessLogic::BrightnessLogic()
 {
 }
 
 void BrightnessLogic::setValue(int value)
 {
     m_value = value;
 }
 
 void BrightnessLogic::setValueMax(int valueMax)
 {
     if (valueMax != m_valueMax) {
         m_valueMax = valueMax;
         m_steps = calculateSteps(valueMax);
     }
 }
 
 void BrightnessLogic::setValueBeforeTogglingOff(int valueBeforeTogglingOff)
 {
     m_valueBeforeTogglingOff = valueBeforeTogglingOff;
 }
 
 int BrightnessLogic::action(BrightnessKeyType type) const
 {
     switch (type) {
     case Increase:
         return increased();
     case Decrease:
         return decreased();
     case Toggle:
         return toggled();
     case IncreaseSmall:
         return increasedSmall();
     case DecreaseSmall:
         return decreasedSmall();
     }
 
     return -1; // We shouldn't get here
 }
 
 int BrightnessLogic::increased() const
 {
     if (m_value == m_valueMax) {
         return m_valueMax; // we are at the maximum already
     }
 
     // Add 1 and round upwards to the nearest step
     int step = m_steps - (m_valueMax - m_value - 1) * m_steps / m_valueMax;
 
     if (m_valueMax > 100 && qRound(percentage(stepToValue(step))) <= qRound(percentage(m_value))) {
         // When no visible change was made, add 1 step.
         // This can happen only if valueMax > 100, else 1 >= 1%.
         step++;
     }
 
     return stepToValue(step);
 }
 
 int BrightnessLogic::increasedSmall() const
 {
     const double newPercent = (std::round(m_value * 100 / double(m_valueMax)) + 1) / 100.0;
     return std::min<int>(m_valueMax, std::round(m_valueMax * newPercent));
 }
 
 int BrightnessLogic::decreased() const
 {
     if (m_value == valueMin()) {
         return valueMin(); // we are at the minimum already
     }
 
     // Subtract 1 and round downwards to the nearest Step
     int step = (m_value - 1) * m_steps / m_valueMax;
 
     if (m_valueMax > 100 && qRound(percentage(stepToValue(step))) >= qRound(percentage(m_value))) {
         // When no visible change was made, subtract 1 step.
         // This can happen only if valueMax > 100, else 1 >= 1%.
         step--;
     }
 
     return stepToValue(step);
 }
 
 int BrightnessLogic::decreasedSmall() const
 {
     const double newPercent = (std::round(m_value * 100 / double(m_valueMax)) - 1) / 100.0;
     return std::max<int>(valueMin(), std::round(m_valueMax * newPercent));
 }
 
 int BrightnessLogic::toggled() const
 {
     if (m_value > 0) {
         return 0; // currently on: toggle off
     } else if (m_valueBeforeTogglingOff > 0) {
         return m_valueBeforeTogglingOff; // currently off and was on before toggling: restore
     } else {
         return m_valueMax; // currently off and would stay off if restoring: toggle to max
     }
 }
 
 int BrightnessLogic::steps() const
 {
     return m_steps;
 }
 
 float BrightnessLogic::percentage(int value) const
 {
     return value * 100.0 / m_valueMax;
 }
 
 const BrightnessLogic::BrightnessInfo BrightnessLogic::info() const
 {
     return BrightnessInfo{m_value, m_valueMax, m_valueBeforeTogglingOff, m_steps};
 }
 
 int BrightnessLogic::stepToValue(int step) const
 {
     return qBound(valueMin(), qRound(step * 1.0 * m_valueMax / m_steps), m_valueMax);
 }
 
 }