diff --git a/abstract_client.h b/abstract_client.h
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -539,8 +539,8 @@
     void setupWindowRules(bool ignore_temporary);
     void evaluateWindowRules();
     virtual void applyWindowRules();
-    virtual void takeFocus() = 0;
-    virtual bool wantsInput() const = 0;
+    virtual void takeFocus();
+    virtual bool wantsInput() const;
     /**
      * Whether a dock window wants input.
      *
@@ -909,12 +909,7 @@
     void setIcon(const QIcon &icon);
     void startAutoRaise();
     void autoRaise();
-    /**
-     * Whether the window accepts focus.
-     * The difference to wantsInput is that the implementation should not check rules and return
-     * what the window effectively supports.
-     */
-    virtual bool acceptsFocus() const = 0;
+    virtual bool acceptsFocus() const;
     /**
      * Called from setActive once the active value got updated, but before the changed signal
      * is emitted.
diff --git a/abstract_client.cpp b/abstract_client.cpp
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -3300,4 +3300,36 @@
     return false;
 }
 
+/**
+ * Returns @c true if the window accepts focus; otherwise returns @c false.
+ *
+ * The difference to wantsInput is that the implementation should not check rules and return
+ * what the window effectively supports.
+ *
+ * Default implementation returns @c false.
+ */
+bool AbstractClient::acceptsFocus() const
+{
+    return false;
+}
+
+/**
+ * Returns @c true if the window accepts focus; otherwise returns @c false.
+ *
+ * Default implementation returns @c false.
+ */
+bool AbstractClient::wantsInput() const
+{
+    return false;
+}
+
+/**
+ * Performs the actual focusing of the window.
+ *
+ * Default implementation does nothing.
+ */
+void AbstractClient::takeFocus()
+{
+}
+
 }
diff --git a/internal_client.h b/internal_client.h
--- a/internal_client.h
+++ b/internal_client.h
@@ -60,7 +60,6 @@
     bool isResizable() const override;
     bool noBorder() const override;
     bool userCanSetNoBorder() const override;
-    bool wantsInput() const override;
     bool isInternal() const override;
     bool isLockScreen() const override;
     bool isInputMethod() const override;
@@ -76,7 +75,6 @@
     bool supportsWindowRules() const override;
     AbstractClient *findModal(bool allow_itself = false) override;
     void setOnAllActivities(bool set) override;
-    void takeFocus() override;
     void setNoBorder(bool set) override;
     void updateDecoration(bool check_workspace_pos, bool force = false) override;
     void updateColorScheme() override;
@@ -88,7 +86,6 @@
     QWindow *internalWindow() const;
 
 protected:
-    bool acceptsFocus() const override;
     bool belongsToSameApplication(const AbstractClient *other, SameApplicationChecks checks) const override;
     void destroyDecoration() override;
     void doMove(int x, int y) override;
diff --git a/internal_client.cpp b/internal_client.cpp
--- a/internal_client.cpp
+++ b/internal_client.cpp
@@ -243,11 +243,6 @@
     return !m_internalWindowFlags.testFlag(Qt::FramelessWindowHint) || m_internalWindowFlags.testFlag(Qt::Popup);
 }
 
-bool InternalClient::wantsInput() const
-{
-    return false;
-}
-
 bool InternalClient::isInternal() const
 {
     return true;
@@ -368,10 +363,6 @@
     // Internal clients do not support activities.
 }
 
-void InternalClient::takeFocus()
-{
-}
-
 void InternalClient::setNoBorder(bool set)
 {
     if (!userCanSetNoBorder()) {
@@ -484,11 +475,6 @@
     return m_internalWindow;
 }
 
-bool InternalClient::acceptsFocus() const
-{
-    return false;
-}
-
 bool InternalClient::belongsToSameApplication(const AbstractClient *other, SameApplicationChecks checks) const
 {
     Q_UNUSED(checks)