138 lines
4.4 KiB
C++
138 lines
4.4 KiB
C++
// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
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//
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// SPDX-License-Identifier: LGPL-3.0-or-later
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#ifndef DESKTOPENTRY_H
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#define DESKTOPENTRY_H
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#include <QString>
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#include <QMap>
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#include <QDebug>
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#include <QLocale>
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#include <QTextStream>
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#include <optional>
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#include <QFile>
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constexpr static auto defaultKeyStr = "default";
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enum class DesktopErrorCode {
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NoError,
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NotFound,
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MismatchedFile,
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InvalidLocation,
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OpenFailed,
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GroupHeaderInvalid,
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EntryKeyInvalid
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};
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struct DesktopFileGuard;
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struct DesktopFile
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{
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friend struct DesktopFileGuard;
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DesktopFile(const DesktopFile &) = delete;
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DesktopFile(DesktopFile &&) = default;
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DesktopFile &operator=(const DesktopFile &) = delete;
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DesktopFile &operator=(DesktopFile &&) = default;
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~DesktopFile() = default;
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[[nodiscard]] QString sourcePath() const noexcept;
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// WARNING: This raw pointer's ownership belong to DesktopFile, DO NOT MODIFY!
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[[nodiscard]] QFile *sourceFile() const noexcept { return &sourceFileRef(); };
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[[nodiscard]] QFile &sourceFileRef() const noexcept { return *m_fileSource; };
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[[nodiscard]] const QString &desktopId() const noexcept { return m_desktopId; }
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[[nodiscard]] bool modified(std::size_t time) const noexcept;
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static std::optional<DesktopFile> searchDesktopFileById(const QString &appId, DesktopErrorCode &err) noexcept;
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static std::optional<DesktopFile> searchDesktopFileByPath(const QString &desktopFilePath, DesktopErrorCode &err) noexcept;
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static std::optional<DesktopFile> createTemporaryDesktopFile(std::unique_ptr<QFile> temporaryFile) noexcept;
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private:
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DesktopFile(std::unique_ptr<QFile> source, QString fileId, std::size_t mtime)
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: m_mtime(mtime)
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, m_fileSource(std::move(source))
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, m_desktopId(std::move(fileId))
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{
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}
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std::size_t m_mtime;
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std::unique_ptr<QFile> m_fileSource{nullptr};
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QString m_desktopId{""};
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};
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struct DesktopFileGuard
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{
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DesktopFileGuard(const DesktopFileGuard &) = delete;
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DesktopFileGuard(DesktopFileGuard &&other) noexcept
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: fileRef(other.fileRef)
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{
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}
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DesktopFileGuard &operator=(const DesktopFileGuard &) = delete;
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DesktopFileGuard &operator=(DesktopFileGuard &&) = delete;
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explicit DesktopFileGuard(DesktopFile &file)
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: fileRef(file)
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{
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}
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bool try_open() { return fileRef.m_fileSource->open(QFile::ExistingOnly | QFile::ReadOnly | QFile::Text); }
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~DesktopFileGuard()
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{
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if (fileRef.m_fileSource->isOpen()) {
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fileRef.m_fileSource->close();
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}
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}
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private:
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DesktopFile &fileRef;
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};
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class DesktopEntry
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{
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public:
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class Value final : private QMap<QString, QString>
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{
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public:
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using QMap<QString, QString>::QMap;
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using QMap<QString, QString>::find;
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using QMap<QString, QString>::insert;
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using QMap<QString, QString>::cbegin;
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using QMap<QString, QString>::cend;
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using QMap<QString, QString>::begin;
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using QMap<QString, QString>::end;
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QString toString(bool &ok) const noexcept;
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bool toBoolean(bool &ok) const noexcept;
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QString toIconString(bool &ok) const noexcept;
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float toNumeric(bool &ok) const noexcept;
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QString toLocaleString(const QLocale &locale, bool &ok) const noexcept;
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friend QDebug operator<<(QDebug debug, const DesktopEntry::Value &v);
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private:
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[[nodiscard]] static QString unescape(const QString &str) noexcept;
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};
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DesktopEntry() = default;
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DesktopEntry(const DesktopEntry &) = default;
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DesktopEntry(DesktopEntry &&) = default;
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DesktopEntry &operator=(const DesktopEntry &) = default;
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DesktopEntry &operator=(DesktopEntry &&) = default;
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~DesktopEntry() = default;
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[[nodiscard]] DesktopErrorCode parse(DesktopFile &file) noexcept;
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[[nodiscard]] DesktopErrorCode parse(QTextStream &stream) noexcept;
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[[nodiscard]] std::optional<QMap<QString, Value>> group(const QString &key) const noexcept;
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[[nodiscard]] std::optional<Value> value(const QString &key, const QString &valueKey) const noexcept;
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private:
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QMap<QString, QMap<QString, Value>> m_entryMap;
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auto parserGroupHeader(const QString &str) noexcept;
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static DesktopErrorCode parseEntry(const QString &str, decltype(m_entryMap)::iterator ¤tGroup) noexcept;
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};
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QDebug operator<<(QDebug debug, const DesktopEntry::Value &v);
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QDebug operator<<(QDebug debug, const DesktopErrorCode &v);
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#endif
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