homescreen: Activate animation after screen unlock

components/mobileshell/qml/homescreen/HomeScreen.qml

@@ -107,6 +107,19 @@ Item {
 
 //END API implementation
 
+    Connections {
+        target: MobileShellState.LockscreenDBusClient
+
+        function onLockscreenActiveChanged() {
+            // run zoom animation after login
+            if (!MobileShellState.LockscreenDBusClient.lockscreenActive) {
+                itemContainer.opacity = 0;
+                itemContainer.zoomScale = 0.8;
+                itemContainer.zoomIn();
+            }
+        }
+    }
+
     Component.onCompleted: {
         // determine the margins used
         evaluateMargins();

components/mobileshellstate/CMakeLists.txt

@@ -8,6 +8,7 @@ set(mobileshellstateplugin_SRCS
     mobileshellstateplugin.cpp
     shelldbusobject.cpp
     shelldbusclient.cpp
+    lockscreendbusclient.cpp
 )
 
 qt_generate_dbus_interface(

components/mobileshellstate/lockscreendbusclient.cpp

@@ -0,0 +1,48 @@
+// SPDX-FileCopyrightText: 2023 Devin Lin <devin@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "lockscreendbusclient.h"
+
+#include <QDBusConnection>
+#include <QDBusMessage>
+#include <QDBusReply>
+#include <QTimer>
+
+LockscreenDBusClient::LockscreenDBusClient(QObject *parent)
+    : QObject{parent}
+{
+    QDBusMessage request = QDBusMessage::createMethodCall(QStringLiteral("org.freedesktop.ScreenSaver"),
+                                                          QStringLiteral("/ScreenSaver"),
+                                                          QStringLiteral("org.freedesktop.ScreenSaver"),
+                                                          QStringLiteral("GetActive"));
+    const QDBusReply<bool> response = QDBusConnection::sessionBus().call(request);
+
+    m_lockscreenActive = response.isValid() ? response.value() : false;
+    Q_EMIT lockscreenActiveChanged();
+
+    QDBusConnection::sessionBus().connect(QStringLiteral("org.freedesktop.ScreenSaver"),
+                                          QStringLiteral("/ScreenSaver"),
+                                          QStringLiteral("org.freedesktop.ScreenSaver"),
+                                          QStringLiteral("ActiveChanged"),
+                                          this,
+                                          SLOT(slotLockscreenActiveChanged));
+}
+
+LockscreenDBusClient *LockscreenDBusClient::self()
+{
+    static LockscreenDBusClient *instance = new LockscreenDBusClient;
+    return instance;
+}
+
+bool LockscreenDBusClient::lockscreenActive() const
+{
+    return m_lockscreenActive;
+}
+
+void LockscreenDBusClient::slotLockscreenActiveChanged(bool active)
+{
+    if (active != m_lockscreenActive) {
+        m_lockscreenActive = active;
+        Q_EMIT lockscreenActiveChanged();
+    }
+}

components/mobileshellstate/lockscreendbusclient.h

@@ -0,0 +1,29 @@
+// SPDX-FileCopyrightText: 2023 Devin Lin <devin@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <QDBusServiceWatcher>
+#include <QObject>
+#include <QString>
+
+class LockscreenDBusClient : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(bool lockscreenActive READ lockscreenActive NOTIFY lockscreenActiveChanged);
+
+public:
+    explicit LockscreenDBusClient(QObject *parent = nullptr);
+    static LockscreenDBusClient *self();
+
+    bool lockscreenActive() const;
+
+Q_SIGNALS:
+    void lockscreenActiveChanged();
+
+public Q_SLOTS:
+    void slotLockscreenActiveChanged(bool active);
+
+private:
+    bool m_lockscreenActive;
+};

components/mobileshellstate/mobileshellstateplugin.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "mobileshellstateplugin.h"
+#include "lockscreendbusclient.h"
 #include "shelldbusclient.h"
 #include "shelldbusobject.h"
 
@@ -23,4 +24,7 @@ void MobileShellStatePlugin::registerTypes(const char *uri)
     qmlRegisterSingletonType<ShellDBusObject>(uri, 1, 0, "ShellDBusObject", [](QQmlEngine *, QJSEngine *) -> QObject * {
         return ShellDBusObject::self();
     });
+    qmlRegisterSingletonType<LockscreenDBusClient>(uri, 1, 0, "LockscreenDBusClient", [](QQmlEngine *, QJSEngine *) -> QObject * {
+        return LockscreenDBusClient::self();
+    });
 }