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Telegram/ThirdParty/fcitx5-qt/qt5/platforminputcontext/fcitx4watcher.h

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+/*
+ * SPDX-FileCopyrightText: 2011~2023 CSSlayer <wengxt@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef FCITXWATCHER_H_
+#define FCITXWATCHER_H_
+
+#include <QDBusConnection>
+#include <QObject>
+
+class QFileSystemWatcher;
+class QDBusServiceWatcher;
+
+namespace fcitx {
+
+// A FcitxQtConnection replacement, to implement compatibility with fcitx 5.
+// Since we have three thing to monitor, the situation becomes much more
+// complexer.
+class Fcitx4Watcher : public QObject {
+    Q_OBJECT
+public:
+    explicit Fcitx4Watcher(QDBusConnection sessionBus,
+                           QObject *parent = nullptr);
+    ~Fcitx4Watcher();
+    void watch();
+    void unwatch();
+
+    bool availability() const;
+
+    QDBusConnection connection() const;
+    QString service() const;
+
+Q_SIGNALS:
+    void availabilityChanged(bool);
+
+private Q_SLOTS:
+    void dbusDisconnected();
+    void socketFileChanged();
+    void imChanged(const QString &service, const QString &oldOwner,
+                   const QString &newOwner);
+
+private:
+    QString address();
+    void watchSocketFile();
+    void unwatchSocketFile();
+    void createConnection();
+    void cleanUpConnection();
+    void setAvailability(bool availability);
+    void updateAvailability();
+
+    QFileSystemWatcher *fsWatcher_ = nullptr;
+    QDBusServiceWatcher *serviceWatcher_ = nullptr;
+    QDBusConnection *connection_;
+    QDBusConnection sessionBus_;
+    QString socketFile_;
+    QString serviceName_;
+    bool availability_ = false;
+    bool mainPresent_ = false;
+    bool watched_ = false;
+    QString uniqueConnectionName_;
+};
+
+} // namespace fcitx
+
+#endif // FCITXWATCHER_H_