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globals.h
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globals.h
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#pragma once
#include <QString>
#include <QStandardPaths>
#include <QDir>
#include <QJsonDocument>
#include <QFont>
#include <QFontMetrics>
#include <chrono>
#include <optional>
#include <random>
#include <stdexcept>
using namespace Qt::Literals::StringLiterals;
namespace Resources
{
inline const char *CELESTE=":/celeste.png";
}
namespace Concept
{
template<typename T> concept Container=requires(T m)
{
requires std::forward_iterator<typename T::iterator>;
{ m.empty() }->std::same_as<bool>;
{ m.size() }->std::same_as<typename T::size_type>;
};
template<typename T> concept AssociativeContainer=requires(T m,typename T::key_type k)
{
typename T::key_type;
typename T::mapped_type;
typename T::const_iterator;
{ m.find(k) }->std::convertible_to<typename T::const_iterator>;
};
template <typename T> concept Widget=std::is_base_of<QWidget,T>::value;
}
namespace NumberConvert
{
template <std::integral T>
inline unsigned int Positive(T value)
{
if (static_cast<std::size_t>(std::abs(value)) > static_cast<std::size_t>(std::numeric_limits<unsigned int>::max())) throw std::range_error("Overflow converting to positive integer");
return value >= 0 ? static_cast<unsigned int>(value) : 0;
}
}
namespace StringConvert
{
inline QByteArray ByteArray(const QString &value) { return value.toLocal8Bit(); } // TODO: how do I report that this failed?
inline QString Integer(const int &value)
{
QString result=QString::number(value);
if (result.isEmpty()) throw std::range_error("Unable to convert number to text");
return result;
}
inline int Integer(const QString &value)
{
bool succeeded=false;
int result=value.toInt(&succeeded);
if (!succeeded) throw std::range_error("Unable to convert text to number");
return result;
}
inline QString PositiveInteger(const unsigned int &value)
{
QString result=QString::number(value);
if (result.isEmpty()) throw std::range_error("Unable to convert number to text");
return result;
}
inline unsigned int PositiveInteger(const QString &value)
{
bool succeeded=false;
unsigned int result=value.toUInt(&succeeded);
if (!succeeded) throw std::range_error("Unable to convert text to positive number");
return result;
}
template <std::unsigned_integral T>
inline QString NumberAgreement(const QString &singular,const QString &plural,T count)
{
return count == 1 ? singular : plural;
}
inline const QString SafeDump(const QString &data)
{
#if defined QT_DEBUG && defined DEVELOPER_MODE
QStringList lines=data.split("\n",Qt::SkipEmptyParts);
for (QString &line : lines) line.prepend("> ");
return lines.join("\n");
#else
Q_UNUSED(data)
return QString("> (data)");
#endif
}
inline int RestrictFontWidth(QFont font,const QString &text,int maxPixels)
{
int originalPointSize=font.pointSize();
QFontMetrics metrics{font};
QRect bounds=metrics.boundingRect(text);
while (bounds.width() > maxPixels)
{
int reducedPointSize=font.pointSize()-1;
if (reducedPointSize < 1) return originalPointSize;
font.setPointSize(reducedPointSize);
metrics=QFontMetrics{font};
bounds=metrics.boundingRect(text);
}
return font.pointSize();
}
}
namespace TimeConvert
{
constexpr std::chrono::seconds Seconds(const std::chrono::milliseconds &value) { return std::chrono::duration_cast<std::chrono::seconds>(value); }
constexpr std::chrono::milliseconds Milliseconds(const std::chrono::seconds &value) { return std::chrono::duration_cast<std::chrono::milliseconds>(value); }
constexpr int Interval(const std::chrono::seconds &value) { return value.count(); }
constexpr int Interval(const std::chrono::milliseconds &value) { return value.count(); }
constexpr std::chrono::seconds OneSecond() { return static_cast<std::chrono::seconds>(1); }
inline const std::chrono::milliseconds Now() { return std::chrono::time_point_cast<std::chrono::milliseconds>(std::chrono::system_clock::now()).time_since_epoch(); }
}
namespace StringView
{
inline std::optional<QStringView> Take(QStringView &window,QChar delimiter)
{
QStringView candidate=window.left(window.indexOf(delimiter));
window=window.mid(candidate.size()+1);
if (candidate.isEmpty()) return std::nullopt;
return candidate.trimmed();
}
inline std::optional<QStringView> Take(QStringView &window,QChar lead,QChar delimiter)
{
if (window.front() != lead) return std::nullopt;
window=window.mid(1);
return Take(window,delimiter);
}
inline std::optional<QStringView> First(const QStringView &window,QChar delimiter)
{
QStringView candidate=window.left(window.indexOf(delimiter));
if (candidate.isEmpty()) return std::nullopt;
return candidate.trimmed();
}
inline std::optional<QStringView> Last(const QStringView &window,QChar delimiter)
{
QStringView candidate=window.mid(window.lastIndexOf(delimiter)+1);
if (candidate.isEmpty()) return std::nullopt;
return candidate.trimmed();
}
}
namespace Filesystem
{
inline const QDir DataPath()
{
return QStandardPaths::writableLocation(QStandardPaths::AppDataLocation);
}
inline const QDir TemporaryPath()
{
return QStandardPaths::writableLocation(QStandardPaths::TempLocation);
}
inline const QDir HomePath()
{
return QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
}
const std::optional<QString> CreateHiddenFile(const QString &filePath);
inline bool Touch(QFile &file)
{
const QDir path(QFileInfo(file).absolutePath());
if (!file.exists())
{
if (!path.mkpath(path.absolutePath())) return false;
if (!file.open(QIODevice::WriteOnly)) return false;
file.close();
}
return true;
}
}
namespace Random
{
inline std::random_device generator;
inline int Bounded(int lower,int upper)
{
std::uniform_int_distribution<int> distribution(lower,upper);
return distribution(generator);
}
template<Concept::Container T> inline int Bounded(const T &container)
{
if (container.empty()) throw std::range_error("Tried to pull random item from empty container");
if (container.size() > std::numeric_limits<int>::max()) throw std::range_error("Container contains too many elements");
return Bounded(0,static_cast<int>(container.size())-1);
}
template<Concept::Container T> inline void Shuffle(T &container)
{
std::shuffle(container.begin(),container.end(),generator);
}
}
namespace JSON
{
namespace Keys
{
inline const char *DATA="data";
}
struct ParseResult
{
bool success;
QJsonDocument json;
QString error;
operator bool() const { return success; }
QJsonDocument operator()() const { return json; }
};
inline ParseResult Parse(const QByteArray &data)
{
QJsonParseError jsonError={
.offset=0,
.error=QJsonParseError::NoError
};
const QJsonDocument json=QJsonDocument::fromJson(data,&jsonError);
QString error;
bool success=true;
if (jsonError.error != QJsonParseError::NoError)
{
success=false;
error=jsonError.errorString();
}
return {
.success=success,
.json=json,
.error=error
};
}
}
namespace Container
{
template <Concept::AssociativeContainer T>
typename T::mapped_type Resolve(T &container,const typename T::key_type &key,const typename T::mapped_type &value)
{
auto candidate=container.find(key);
return candidate == container.end() ? value : *candidate;
}
}
namespace Platform
{
constexpr bool Windows()
{
#ifdef Q_OS_WIN
return true;
#else
return false;
#endif
}
}