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// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "DolphinQt/Config/Mapping/MappingCommon.h"
#include <tuple>
#include <vector>
#include <QApplication>
#include <QPushButton>
#include <QRegularExpression>
#include <QString>
#include <QTimer>
#include "DolphinQt/QtUtils/BlockUserInputFilter.h"
#include "InputCommon/ControlReference/ControlReference.h"
#include "Common/Thread.h"
namespace MappingCommon
{
constexpr auto INPUT_DETECT_INITIAL_TIME = std::chrono::seconds(3);
constexpr auto INPUT_DETECT_CONFIRMATION_TIME = std::chrono::milliseconds(500);
constexpr auto INPUT_DETECT_MAXIMUM_TIME = std::chrono::seconds(5);
constexpr auto OUTPUT_TEST_TIME = std::chrono::seconds(2);
// Pressing inputs at the same time will result in the & operator vs a hotkey expression.
constexpr auto HOTKEY_VS_CONJUNCION_THRESHOLD = std::chrono::milliseconds(50);
// Some devices (e.g. DS4) provide an analog and digital input for the trigger.
// We prefer just the analog input for simultaneous digital+analog input detections.
constexpr auto SPURIOUS_TRIGGER_COMBO_THRESHOLD = std::chrono::milliseconds(150);
QString GetExpressionForControl(const QString& control_name,
const ciface::Core::DeviceQualifier& control_device,
const ciface::Core::DeviceQualifier& default_device, Quote quote)
{
QString expr;
// non-default device
if (control_device != default_device)
{
expr += QString::fromStdString(control_device.ToString());
expr += QLatin1Char{':'};
}
// append the control name
expr += control_name;
if (quote == Quote::On)
{
// If our expression contains any non-alpha characters
// we should quote it
const QRegularExpression reg(QStringLiteral("[^a-zA-Z]"));
if (reg.match(expr).hasMatch())
expr = QStringLiteral("`%1`").arg(expr);
}
return expr;
}
QString DetectExpression(QPushButton* button, ciface::Core::DeviceContainer& device_container,
const std::vector<std::string>& device_strings,
const ciface::Core::DeviceQualifier& default_device, Quote quote)
{
const auto filter = new BlockUserInputFilter(button);
button->installEventFilter(filter);
button->grabKeyboard();
button->grabMouse();
const auto old_text = button->text();
button->setText(QStringLiteral("..."));
// The button text won't be updated if we don't process events here
QApplication::processEvents();
// Avoid that the button press itself is registered as an event
Common::SleepCurrentThread(50);
auto detections =
device_container.DetectInput(device_strings, INPUT_DETECT_INITIAL_TIME,
INPUT_DETECT_CONFIRMATION_TIME, INPUT_DETECT_MAXIMUM_TIME);
RemoveSpuriousTriggerCombinations(&detections);
const auto timer = new QTimer(button);
button->connect(timer, &QTimer::timeout, [button, filter] {
button->releaseMouse();
button->releaseKeyboard();
button->removeEventFilter(filter);
});
// Prevent mappings of "space", "return", or mouse clicks from re-activating detection.
timer->start(500);
button->setText(old_text);
return BuildExpression(detections, default_device, quote);
}
void TestOutput(QPushButton* button, OutputReference* reference)
{
const auto old_text = button->text();
button->setText(QStringLiteral("..."));
// The button text won't be updated if we don't process events here
QApplication::processEvents();
reference->State(1.0);
std::this_thread::sleep_for(OUTPUT_TEST_TIME);
reference->State(0.0);
button->setText(old_text);
}
void RemoveSpuriousTriggerCombinations(
std::vector<ciface::Core::DeviceContainer::InputDetection>* detections)
{
const auto is_spurious = [&](auto& detection) {
return std::any_of(detections->begin(), detections->end(), [&](auto& d) {
// This is a suprious digital detection if a "smooth" (analog) detection is temporally near.
return &d != &detection && d.smoothness > 1 &&
abs(d.press_time - detection.press_time) < SPURIOUS_TRIGGER_COMBO_THRESHOLD;
});
};
detections->erase(std::remove_if(detections->begin(), detections->end(), is_spurious),
detections->end());
}
QString
BuildExpression(const std::vector<ciface::Core::DeviceContainer::InputDetection>& detections,
const ciface::Core::DeviceQualifier& default_device, Quote quote)
{
std::vector<const ciface::Core::DeviceContainer::InputDetection*> pressed_inputs;
QStringList alternations;
const auto get_control_expression = [&](auto& detection) {
// Return the parent-most name if there is one for better hotkey strings.
// Detection of L/R_Ctrl will be changed to just Ctrl.
// Users can manually map L_Ctrl if they so desire.
const auto input = (quote == Quote::On) ?
detection.device->GetParentMostInput(detection.input) :
detection.input;
ciface::Core::DeviceQualifier device_qualifier;
device_qualifier.FromDevice(detection.device.get());
return MappingCommon::GetExpressionForControl(QString::fromStdString(input->GetName()),
device_qualifier, default_device, quote);
};
bool new_alternation = false;
const auto handle_press = [&](auto& detection) {
pressed_inputs.emplace_back(&detection);
new_alternation = true;
};
const auto handle_release = [&]() {
if (!new_alternation)
return;
new_alternation = false;
QStringList alternation;
for (auto* input : pressed_inputs)
alternation.push_back(get_control_expression(*input));
const bool is_hotkey = pressed_inputs.size() >= 2 &&
(pressed_inputs[1]->press_time - pressed_inputs[0]->press_time) >
HOTKEY_VS_CONJUNCION_THRESHOLD;
if (is_hotkey)
{
alternations.push_back(QStringLiteral("@(%1)").arg(alternation.join(QLatin1Char('+'))));
}
else
{
alternation.sort();
alternations.push_back(alternation.join(QLatin1Char('&')));
}
};
for (auto& detection : detections)
{
// Remove since released inputs.
for (auto it = pressed_inputs.begin(); it != pressed_inputs.end();)
{
if (!((*it)->release_time > detection.press_time))
{
handle_release();
it = pressed_inputs.erase(it);
}
else
++it;
}
handle_press(detection);
}
handle_release();
alternations.removeDuplicates();
return alternations.join(QLatin1Char('|'));
}
} // namespace MappingCommon
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