feat: add categories for application service

Signed-off-by: ComixHe <heyuming@deepin.org>

api/dbus/org.desktopspec.ApplicationManager1.Application.xml

@@ -5,6 +5,8 @@
                 name="org.freedesktop.DBus.Description"
                 value="This interface is designed to provide a dbus interface of desktop file. Missing fields will be added later."
         />
+        
+        <property name="Categories" type="as" access="read"/>
 
         <property name="Actions" type="as" access="read">
            <annotation

src/dbus/applicationservice.cpp

@@ -202,27 +202,27 @@ QDBusObjectPath ApplicationService::Launch(const QString &action, const QStringL
 
 QStringList ApplicationService::actions() const noexcept
 {
-    if (m_entry.isNull()) {
-        qWarning() << "desktop entry is empty, source file:" << m_desktopSource.sourcePath();
+    auto val = findEntryValue(DesktopFileEntryKey, "Actions", EntryValueType::String);
+
+    if (val.isNull()) {
         return {};
     }
 
-    const auto &actions = m_entry->value(DesktopFileEntryKey, "Actions");
-    if (!actions) {
-        return {};
-    }
-
-    bool ok{false};
-    const auto &str = actions->toString(ok);
-    if (!ok) {
-        qWarning() << "Actions convert to String failed.";
-        return {};
-    }
-
-    auto actionList = str.split(";", Qt::SkipEmptyParts);
+    auto actionList = val.toString().split(";", Qt::SkipEmptyParts);
     return actionList;
 }
 
+QStringList ApplicationService::categories() const noexcept
+{
+    auto val = findEntryValue(DesktopFileEntryKey, "Categories", EntryValueType::String);
+
+    if (val.isNull()) {
+        return {};
+    }
+
+    return val.toString().split(';', Qt::SkipEmptyParts);
+}
+
 PropMap ApplicationService::actionName() const noexcept
 {
     PropMap ret;
@@ -477,3 +477,47 @@ LaunchTask ApplicationService::unescapeExec(const QString &str, const QStringLis
 
     return task;
 }
+
+QVariant ApplicationService::findEntryValue(const QString &group,
+                                            const QString &valueKey,
+                                            EntryValueType type,
+                                            const QLocale &locale) const noexcept
+{
+    QVariant ret;
+    auto tmp = m_entry->value(group, valueKey);
+    if (!tmp.has_value()) {
+        return ret;
+    }
+
+    auto val = std::move(tmp).value();
+    bool ok{false};
+
+    switch (type) {
+    case EntryValueType::String: {
+        auto valStr = val.toString(ok);
+        if (ok) {
+            ret = QVariant::fromValue(valStr);
+        }
+    } break;
+    case EntryValueType::LocaleString: {
+        auto valStr = val.toLocaleString(locale, ok);
+        if (ok) {
+            ret = QVariant::fromValue(valStr);
+        }
+    } break;
+    case EntryValueType::Boolean: {
+        auto valBool = val.toBoolean(ok);
+        if (ok) {
+            ret = QVariant::fromValue(valBool);
+        }
+    } break;
+    case EntryValueType::IconString: {
+        auto valStr = val.toIconString(ok);
+        if (ok) {
+            ret = QVariant::fromValue(valStr);
+        }
+    } break;
+    }
+
+    return ret;
+}

src/dbus/applicationservice.h

@@ -32,6 +32,9 @@ public:
     ApplicationService &operator=(const ApplicationService &) = delete;
     ApplicationService &operator=(ApplicationService &&) = delete;
 
+    Q_PROPERTY(QStringList Categories READ categories)
+    [[nodiscard]] QStringList categories() const noexcept;
+
     Q_PROPERTY(QStringList Actions READ actions)
     [[nodiscard]] QStringList actions() const noexcept;
 
@@ -96,6 +99,10 @@ private:
     QMap<QDBusObjectPath, QSharedPointer<InstanceService>> m_Instances;
     static QString userNameLookup(uid_t uid);
     [[nodiscard]] LaunchTask unescapeExec(const QString &str, const QStringList &fields);
+    [[nodiscard]] QVariant findEntryValue(const QString &group,
+                                          const QString &valueKey,
+                                          EntryValueType type,
+                                          const QLocale &locale = getUserLocale()) const noexcept;
 };
 
 #endif

src/desktopentry.h

@@ -29,6 +29,8 @@ enum class DesktopErrorCode {
 
 enum class EntryContext { Unknown, EntryOuter, Entry, Done };
 
+enum class EntryValueType { String, LocaleString, Boolean, IconString };
+
 struct DesktopFileGuard;
 
 struct DesktopFile