feat: ask which lock screen to use on hyprland and niri

src/agent/locktext.h

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+// The bubble as a line of text, for a lock screen that covers it: hyprlock.
+// When the user keeps their own lock screen (LockScreenStyle=yours), the
+// menu puts a label into hyprlock's config that shows the file at path()
+// (see src/lib/system.sh). This writes what the bubble shows into it, and
+// SIGUSR2 makes hyprlock read it again.
+
+#pragma once
+
+#include <QObject>
+#include <QString>
+
+class BubbleController;
+class UserConfig;
+
+class LockText : public QObject
+{
+    Q_OBJECT
+public:
+    LockText(BubbleController *bubble, UserConfig *config, QObject *parent = nullptr);
+    ~LockText() override;
+
+    static QString path();
+    // The line for a phase and message of the bubble.
+    static QString text(const QString &phase, const QString &message);
+
+private:
+    void update();
+    void refresh();
+    void write(const QString &text);
+
+    BubbleController *m_bubble;
+    UserConfig *m_config;
+    QString m_text;
+    int m_tries = 0;
+};