Carla/source/modules/juce_audio_processors/utilities/juce_AudioParameterBool.cpp

/*
  ==============================================================================

   This file is part of the JUCE 7 technical preview.
   Copyright (c) 2022 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For the technical preview this file cannot be licensed commercially.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

AudioParameterBool::AudioParameterBool (const ParameterID& idToUse,
                                        const String& nameToUse,
                                        bool def,
                                        const AudioParameterBoolAttributes& attributes)
    : RangedAudioParameter (idToUse, nameToUse, attributes.getAudioProcessorParameterWithIDAttributes()),
      value (def ? 1.0f : 0.0f),
      valueDefault (def),
      stringFromBoolFunction (attributes.getStringFromValueFunction() != nullptr
                                  ? attributes.getStringFromValueFunction()
                                  : [] (bool v, int) { return v ? TRANS("On") : TRANS("Off"); }),
      boolFromStringFunction (attributes.getValueFromStringFunction() != nullptr
                                  ? attributes.getValueFromStringFunction()
                                  : [] (const String& text)
                                    {
                                        static const StringArray onStrings { TRANS ("on"), TRANS ("yes"), TRANS ("true") };
                                        static const StringArray offStrings { TRANS ("off"), TRANS ("no"), TRANS ("false") };

                                        String lowercaseText (text.toLowerCase());

                                        for (auto& testText : onStrings)
                                            if (lowercaseText == testText)
                                                return true;

                                        for (auto& testText : offStrings)
                                            if (lowercaseText == testText)
                                                return false;

                                        return text.getIntValue() != 0;
                                    })
{
}

AudioParameterBool::~AudioParameterBool()
{
    #if __cpp_lib_atomic_is_always_lock_free
     static_assert (std::atomic<float>::is_always_lock_free,
                    "AudioParameterBool requires a lock-free std::atomic<float>");
    #endif
}

float AudioParameterBool::getValue() const                               { return value; }
void AudioParameterBool::setValue (float newValue)                       { value = newValue; valueChanged (get()); }
float AudioParameterBool::getDefaultValue() const                        { return valueDefault; }
int AudioParameterBool::getNumSteps() const                              { return 2; }
bool AudioParameterBool::isDiscrete() const                              { return true; }
bool AudioParameterBool::isBoolean() const                               { return true; }
void AudioParameterBool::valueChanged (bool)                             {}

float AudioParameterBool::getValueForText (const String& text) const
{
    return boolFromStringFunction (text) ? 1.0f : 0.0f;
}

String AudioParameterBool::getText (float v, int maximumLength) const
{
    return stringFromBoolFunction (v >= 0.5f, maximumLength);
}

AudioParameterBool& AudioParameterBool::operator= (bool newValue)
{
    if (get() != newValue)
        setValueNotifyingHost (newValue ? 1.0f : 0.0f);

    return *this;
}

} // namespace juce