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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qjoydevicemappingparser_p.h"
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
QJoyDeviceMappingParser::QJoyDeviceMappingParser(const QString &filepath)
: m_filepath(filepath), m_file(filepath), m_stream(&m_file)
{
if (!m_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
qWarning() << "QJoyDeviceMappingParser could not open file" << m_filepath;
return;
}
}
struct Axis
{
JoyAxis axis;
QUniversalInput::JoyAxisRange range;
bool invert;
};
static Axis axisFromString(const QString &axisStr)
{
auto axis = axisStr;
auto joyAxis = JoyAxis::Invalid;
auto axisRange = QUniversalInput::JoyAxisRange::FullAxis;
// if first character is a minus, it's a negative axis
if (axis[0] == u"-"_s) {
axisRange = QUniversalInput::JoyAxisRange::NegativeHalfAxis;
// remove the minus sign
// qstring
axis = axis.remove(0, 1);
} else if (axis[0] == u"+"_s) {
// if first character is a plus, it's a positive axis
axisRange = QUniversalInput::JoyAxisRange::PositiveHalfAxis;
// remove the plus sign
axis = axis.remove(0, 1);
}
if (axis[0] == u"a"_s) {
// remove the a
axis = axis.remove(0, 1);
int axisNumber = axis.toInt();
joyAxis = static_cast<JoyAxis>(axisNumber);
} else if (axis == u"rightx"_s) {
joyAxis = JoyAxis::RightX;
} else if (axis == u"righty"_s) {
joyAxis = JoyAxis::RightY;
} else if (axis == u"leftx"_s) {
joyAxis = JoyAxis::LeftX;
} else if (axis == u"lefty"_s) {
joyAxis = JoyAxis::LeftY;
} else if (axis == u"lefttrigger"_s) {
joyAxis = JoyAxis::TriggerLeft;
} else if (axis == u"righttrigger"_s) {
joyAxis = JoyAxis::TriggerRight;
} else {
qDebug() << "QJoyDeviceMappingParser::axisFromString:" << axis;
}
return {joyAxis, axisRange, false};
}
static JoyButton buttonFromString(const QString &button)
{
if (button == u"a"_s)
return JoyButton::A;
if (button == u"b"_s)
return JoyButton::B;
if (button == u"x"_s)
return JoyButton::X;
if (button == u"y"_s)
return JoyButton::Y;
if (button == u"back"_s)
return JoyButton::Back;
if (button == u"guide"_s)
return JoyButton::Guide;
if (button == u"start"_s)
return JoyButton::Start;
if (button == u"leftstick"_s)
return JoyButton::LeftStick;
if (button == u"rightstick"_s)
return JoyButton::RightStick;
if (button == u"leftshoulder"_s)
return JoyButton::LeftShoulder;
if (button == u"rightshoulder"_s)
return JoyButton::RightShoulder;
if (button == u"dpadup"_s || button == u"dpup"_s)
return JoyButton::DpadUp;
if (button == u"dpaddown"_s || button == u"dpdown"_s)
return JoyButton::DpadDown;
if (button == u"dpadleft"_s || button == u"dpleft"_s)
return JoyButton::DpadLeft;
if (button == u"dpadright"_s || button == u"dpright"_s)
return JoyButton::DpadRight;
if (button == u"misc1"_s)
return JoyButton::Misc1;
if (button == u"paddle1"_s)
return JoyButton::Paddle1;
if (button == u"paddle2"_s)
return JoyButton::Paddle2;
if (button == u"paddle3"_s)
return JoyButton::Paddle3;
if (button == u"paddle4"_s)
return JoyButton::Paddle4;
if (button == u"touchpad"_s)
return JoyButton::Touchpad;
if (button.startsWith(u"b"_s)) {
bool ok;
int index = button.mid(1).toInt(&ok);
if (ok)
return static_cast<JoyButton>(index);
}
qWarning() << "QJoyDeviceMappingParser::buttonFromString: Unknown button" << button;
return JoyButton::Invalid;
}
struct Hat
{
HatDirection direction;
HatMask mask;
};
static Hat hatFromString(const QString &hat)
{
int hatMask = hat[hat.length() - 1].digitValue();
int log2hatMask = qFloor(qLn(hatMask) / qLn(2));
return {HatDirection(log2hatMask), HatMask(hatMask)};
}
QUniversalInput::JoyType QJoyDeviceMappingParser::toJoyType(const QString &type) const
{
if (type == u"a"_s || type == u"b"_s) // these messes with the rest of the capturing
return QUniversalInput::JoyType::TypeButton;
if (auto match = m_buttonRegex.match(type); match.hasMatch() && match.capturedLength() == type.length())
return QUniversalInput::JoyType::TypeButton;
if (m_axisRegex.match(type).hasMatch())
return QUniversalInput::JoyType::TypeAxis;
if (m_hatRegex.match(type).hasMatch())
return QUniversalInput::JoyType::TypeHat;
qWarning() << "QJoyDeviceMappingParser::toJoyType: Unknown type" << type;
return QUniversalInput::JoyType::TypeMax;
}
QUniversalInput::JoyBinding QJoyDeviceMappingParser::parseBinding(const QString &token) const
{
auto actions = token.split(u':');
auto output = actions[0];
auto input = actions[0];
if (actions.size() == 2)
input = actions[1];
QUniversalInput::JoyBinding binding = {};
binding.inputType = toJoyType(input);
binding.outputType = toJoyType(output);
// input
switch (binding.inputType) {
case QUniversalInput::JoyType::TypeButton:
binding.input.button = buttonFromString(input);
break;
case QUniversalInput::JoyType::TypeAxis:
{
auto axis = axisFromString(input);
binding.input.axis.axis = axis.axis;
binding.input.axis.range = axis.range;
binding.input.axis.invert = axis.invert;
break;
}
case QUniversalInput::JoyType::TypeHat:
{
auto hat = hatFromString(input);
binding.input.hat.hat = hat.direction;
binding.input.hat.hat_mask = hat.mask;
break;
}
default:
qWarning() << "QJoyDeviceMappingParser::parseBinding: Unknown input type" << input;
break;
}
// output
switch (binding.outputType) {
case QUniversalInput::JoyType::TypeHat:
binding.outputType = QUniversalInput::JoyType::TypeButton;
break;
case QUniversalInput::JoyType::TypeButton:
binding.output.button = buttonFromString(output);
break;
case QUniversalInput::JoyType::TypeAxis:
{
auto axis = axisFromString(output);
binding.output.axis.axis = axis.axis;
binding.output.axis.range = axis.range;
break;
}
default:
qWarning() << "QJoyDeviceMappingParser::parseBinding: Unknown output type" << output;
break;
}
return binding;
}
std::optional<QUniversalInput::JoyDeviceMapping> QJoyDeviceMappingParser::next()
{
if (m_stream.atEnd())
return {};
auto line = m_stream.readLine().trimmed();
// skip comments and empty lines
while (line.startsWith(u"#"_s) || line.isEmpty()) {
line = m_stream.readLine().trimmed();
if (m_stream.atEnd())
return {};
}
auto tokens = line.split(u',');
// last , makes an empty token
if (tokens.back().isEmpty())
tokens.pop_back();
auto uid = tokens.takeFirst();
auto name = tokens.takeFirst();
auto platform = tokens.takeLast();
Q_UNUSED(platform); // just had to remove platform from the tokens
QVector<QUniversalInput::JoyBinding> bindings;
for (const auto &token : tokens) {
auto bindingToken = token.trimmed();
auto binding = parseBinding(bindingToken);
bindings.push_back(binding);
}
QUniversalInput::JoyDeviceMapping mapping = {uid, name, bindings};
return mapping;
}
QT_END_NAMESPACE
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