[frameworks/kguiaddons] src/systemclipboard: Add KSystemClipboard::ownsClipboard

Git commit 36ff5dd441d7203a527da19806d7bdefa755e5a8 by David Edmundson.
Committed on 06/08/2026 at 19:32.
Pushed by davidedmundson into branch 'master'.

Add KSystemClipboard::ownsClipboard

This brings it in line with QClipboard

M  +34   -0    src/systemclipboard/ksystemclipboard.cpp
M  +8    -0    src/systemclipboard/ksystemclipboard.h
M  +10   -0    src/systemclipboard/qtclipboard.cpp
M  +3    -0    src/systemclipboard/qtclipboard_p.h
M  +10   -0    src/systemclipboard/waylandclipboard.cpp
M  +2    -0    src/systemclipboard/waylandclipboard_p.h
M  +16   -0    src/systemclipboard/wlrwaylandclipboard.cpp
M  +3    -0    src/systemclipboard/wlrwaylandclipboard_p.h

https://invent.kde.org/frameworks/kguiaddons/-/commit/36ff5dd441d7203a527da19806d7bdefa755e5a8

diff --git a/src/systemclipboard/ksystemclipboard.cpp b/src/systemclipboard/ksystemclipboard.cpp
index 88324ee..c738a26 100644
--- a/src/systemclipboard/ksystemclipboard.cpp
+++ b/src/systemclipboard/ksystemclipboard.cpp
@@ -53,6 +53,40 @@ QString KSystemClipboard::text(QClipboard::Mode mode)
     return QString();
 }
 
+bool KSystemClipboard::ownsSelection() const
+{
+    // This is a fake virtual, but we're limited due to ABI concerns.
+    // In hindsight I should have added a facade
+#ifdef WITH_WAYLAND
+    if (const auto waylandClipboard = qobject_cast<const WaylandClipboard *>(this)) {
+        return waylandClipboard->ownsSelection();
+    }
+    if (const auto wlrWaylandClipboard = qobject_cast<const WlrWaylandClipboard *>(this)) {
+        return wlrWaylandClipboard->ownsSelection();
+    }
+#endif
+    if (const auto qtClipboard = qobject_cast<const QtClipboard *>(this)) {
+        return qtClipboard->ownsSelection();
+    }
+    return false;
+}
+
+bool KSystemClipboard::ownsClipboard() const
+{
+#ifdef WITH_WAYLAND
+    if (const auto waylandClipboard = qobject_cast<const WaylandClipboard *>(this)) {
+        return waylandClipboard->ownsClipboard();
+    }
+    if (const auto wlrWaylandClipboard = qobject_cast<const WlrWaylandClipboard *>(this)) {
+        return wlrWaylandClipboard->ownsClipboard();
+    }
+#endif
+    if (const auto qtClipboard = qobject_cast<const QtClipboard *>(this)) {
+        return qtClipboard->ownsClipboard();
+    }
+    return false;
+}
+
 KSystemClipboard::KSystemClipboard(QObject *parent)
     : QObject(parent)
 {
diff --git a/src/systemclipboard/ksystemclipboard.h b/src/systemclipboard/ksystemclipboard.h
index eaae134..7894c1b 100644
--- a/src/systemclipboard/ksystemclipboard.h
+++ b/src/systemclipboard/ksystemclipboard.h
@@ -54,6 +54,14 @@ public:
      * Similar to QClipboard::text(QClipboard::Mode mode)
      */
     QString text(QClipboard::Mode mode);
+    /*!
+     * Returns true if this process owns the current primary selection.
+     */
+    bool ownsSelection() const;
+    /*!
+     * Returns true if this process owns the current clipboard selection.
+     */
+    bool ownsClipboard() const;
 Q_SIGNALS:
     /*!
      * Emitted when the clipboard changes similar to QClipboard::changed
diff --git a/src/systemclipboard/qtclipboard.cpp b/src/systemclipboard/qtclipboard.cpp
index 1501794..a0ef4de 100644
--- a/src/systemclipboard/qtclipboard.cpp
+++ b/src/systemclipboard/qtclipboard.cpp
@@ -29,3 +29,13 @@ const QMimeData *QtClipboard::mimeData(QClipboard::Mode mode) const
 {
     return qGuiApp->clipboard()->mimeData(mode);
 }
+
+bool QtClipboard::ownsSelection() const
+{
+    return qGuiApp->clipboard()->ownsSelection();
+}
+
+bool QtClipboard::ownsClipboard() const
+{
+    return qGuiApp->clipboard()->ownsClipboard();
+}
diff --git a/src/systemclipboard/qtclipboard_p.h b/src/systemclipboard/qtclipboard_p.h
index ae06a10..f583b5b 100644
--- a/src/systemclipboard/qtclipboard_p.h
+++ b/src/systemclipboard/qtclipboard_p.h
@@ -11,11 +11,14 @@
 
 class QtClipboard : public KSystemClipboard
 {
+    Q_OBJECT
 public:
     explicit QtClipboard(QObject *parent);
     void setMimeData(QMimeData *mime, QClipboard::Mode mode) override;
     void clear(QClipboard::Mode mode) override;
     const QMimeData *mimeData(QClipboard::Mode mode) const override;
+    bool ownsSelection() const;
+    bool ownsClipboard() const;
 };
 
 #endif
diff --git a/src/systemclipboard/waylandclipboard.cpp b/src/systemclipboard/waylandclipboard.cpp
index 28f3c79..5868a1c 100644
--- a/src/systemclipboard/waylandclipboard.cpp
+++ b/src/systemclipboard/waylandclipboard.cpp
@@ -731,5 +731,15 @@ const QMimeData *WaylandClipboard::mimeData(QClipboard::Mode mode) const
     return nullptr;
 }
 
+bool WaylandClipboard::ownsSelection() const
+{
+    return m_device && m_device->primarySelection();
+}
+
+bool WaylandClipboard::ownsClipboard() const
+{
+    return m_device && m_device->selection();
+}
+
 #include "moc_waylandclipboard_p.cpp"
 #include "waylandclipboard.moc"
diff --git a/src/systemclipboard/waylandclipboard_p.h b/src/systemclipboard/waylandclipboard_p.h
index 6aecd76..51f98d4 100644
--- a/src/systemclipboard/waylandclipboard_p.h
+++ b/src/systemclipboard/waylandclipboard_p.h
@@ -24,6 +24,8 @@ public:
     void setMimeData(QMimeData *mime, QClipboard::Mode mode) override;
     void clear(QClipboard::Mode mode) override;
     const QMimeData *mimeData(QClipboard::Mode mode) const override;
+    bool ownsSelection() const;
+    bool ownsClipboard() const;
 
     bool isValid();
 
diff --git a/src/systemclipboard/wlrwaylandclipboard.cpp b/src/systemclipboard/wlrwaylandclipboard.cpp
index 43db0ae..d257022 100644
--- a/src/systemclipboard/wlrwaylandclipboard.cpp
+++ b/src/systemclipboard/wlrwaylandclipboard.cpp
@@ -726,4 +726,20 @@ const QMimeData *WlrWaylandClipboard::mimeData(QClipboard::Mode mode) const
     return nullptr;
 }
 
+bool WlrWaylandClipboard::ownsSelection() const
+{
+    if (!m_device) {
+        return false;
+    }
+    return m_device->primarySelection();
+}
+
+bool WlrWaylandClipboard::ownsClipboard() const
+{
+    if (!m_device) {
+        return false;
+    }
+    return m_device->selection();
+}
+
 #include "wlrwaylandclipboard.moc"
diff --git a/src/systemclipboard/wlrwaylandclipboard_p.h b/src/systemclipboard/wlrwaylandclipboard_p.h
index 761dd41..76b839b 100644
--- a/src/systemclipboard/wlrwaylandclipboard_p.h
+++ b/src/systemclipboard/wlrwaylandclipboard_p.h
@@ -17,12 +17,15 @@ class WlrKeyboardFocusWatcher;
 
 class WlrWaylandClipboard : public KSystemClipboard
 {
+    Q_OBJECT
 public:
     ~WlrWaylandClipboard();
     static WlrWaylandClipboard *create(QObject *parent);
     void setMimeData(QMimeData *mime, QClipboard::Mode mode) override;
     void clear(QClipboard::Mode mode) override;
     const QMimeData *mimeData(QClipboard::Mode mode) const override;
+    bool ownsSelection() const;
+    bool ownsClipboard() const;
 
     bool isValid();