Add initial work on Qt frontend

src/duckstation-qt/qtsettingsinterface.cpp

@@ -0,0 +1,142 @@
+#include "qtsettingsinterface.h"
+#include <QtCore/QSettings>
+#include <algorithm>
+
+static QString GetFullKey(const char* section, const char* key)
+{
+  return QStringLiteral("%1/%2").arg(section, key);
+}
+
+QtSettingsInterface::QtSettingsInterface(QSettings& settings) : m_settings(settings) {}
+
+QtSettingsInterface::~QtSettingsInterface() = default;
+
+int QtSettingsInterface::GetIntValue(const char* section, const char* key, int default_value /*= 0*/)
+{
+  QVariant value = m_settings.value(GetFullKey(section, key));
+  if (!value.isValid())
+    return default_value;
+
+  bool converted_value_okay;
+  int converted_value = value.toInt(&converted_value_okay);
+  if (!converted_value_okay)
+    return default_value;
+  else
+    return converted_value;
+}
+
+float QtSettingsInterface::GetFloatValue(const char* section, const char* key, float default_value /*= 0.0f*/)
+{
+  QVariant value = m_settings.value(GetFullKey(section, key));
+  if (!value.isValid())
+    return default_value;
+
+  bool converted_value_okay;
+  float converted_value = value.toFloat(&converted_value_okay);
+  if (!converted_value_okay)
+    return default_value;
+  else
+    return converted_value;
+}
+
+bool QtSettingsInterface::GetBoolValue(const char* section, const char* key, bool default_value /*= false*/)
+{
+  QVariant value = m_settings.value(GetFullKey(section, key));
+  return value.isValid() ? value.toBool() : default_value;
+}
+
+std::string QtSettingsInterface::GetStringValue(const char* section, const char* key,
+                                                const char* default_value /*= ""*/)
+{
+  QVariant value = m_settings.value(GetFullKey(section, key));
+  return value.isValid() ? value.toString().toStdString() : std::string(default_value);
+}
+
+void QtSettingsInterface::SetIntValue(const char* section, const char* key, int value)
+{
+  m_settings.setValue(GetFullKey(section, key), QVariant(value));
+}
+
+void QtSettingsInterface::SetFloatValue(const char* section, const char* key, float value)
+{
+  m_settings.setValue(GetFullKey(section, key), QVariant(value));
+}
+
+void QtSettingsInterface::SetBoolValue(const char* section, const char* key, bool value)
+{
+  m_settings.setValue(GetFullKey(section, key), QVariant(value));
+}
+
+void QtSettingsInterface::SetStringValue(const char* section, const char* key, const char* value)
+{
+  m_settings.setValue(GetFullKey(section, key), QVariant(value));
+}
+
+std::vector<std::string> QtSettingsInterface::GetStringList(const char* section, const char* key)
+{
+  QVariant value = m_settings.value(GetFullKey(section, key));
+  if (value.type() == QVariant::String)
+    return { value.toString().toStdString() };
+  else if (value.type() != QVariant::StringList)
+    return {};
+
+  QStringList value_sl = value.toStringList();
+  std::vector<std::string> results;
+  results.reserve(static_cast<unsigned>(value_sl.size()));
+  std::transform(value_sl.begin(), value_sl.end(), std::back_inserter(results),
+                 [](const QString& str) { return str.toStdString(); });
+  return results;
+}
+
+void QtSettingsInterface::SetStringList(const char* section, const char* key,
+                                        const std::vector<std::string_view>& items)
+{
+  QString full_key = GetFullKey(section, key);
+  if (items.empty())
+  {
+    m_settings.remove(full_key);
+    return;
+  }
+
+  QStringList sl;
+  sl.reserve(static_cast<int>(items.size()));
+  std::transform(items.begin(), items.end(), std::back_inserter(sl), [](const std::string_view& sv) {
+    return QString::fromLocal8Bit(sv.data(), static_cast<int>(sv.size()));
+  });
+  m_settings.setValue(full_key, sl);
+}
+
+bool QtSettingsInterface::RemoveFromStringList(const char* section, const char* key, const char* item)
+{
+  QString full_key = GetFullKey(section, key);
+  QVariant var = m_settings.value(full_key);
+  QStringList sl = var.toStringList();
+  if (sl.removeAll(item) == 0)
+    return false;
+
+  if (sl.isEmpty())
+    m_settings.remove(full_key);
+  else
+    m_settings.setValue(full_key, sl);
+  return true;
+}
+
+bool QtSettingsInterface::AddToStringList(const char* section, const char* key, const char* item)
+{
+  QString full_key = GetFullKey(section, key);
+  QVariant var = m_settings.value(full_key);
+
+  QStringList sl = (var.type() == QVariant::StringList) ? var.toStringList() : QStringList();
+  QString qitem(item);
+  if (sl.contains(qitem))
+    return false;
+
+  sl.push_back(qitem);
+  m_settings.setValue(full_key, sl);
+  return true;
+}
+
+void QtSettingsInterface::DeleteValue(const char* section, const char* key)
+{
+  m_settings.remove(GetFullKey(section, key));
+}