diff --git a/src/abstract_client.cpp b/src/abstract_client.cpp
index 0b480f229b..44d2dea4aa 100644
--- a/src/abstract_client.cpp
+++ b/src/abstract_client.cpp
@@ -3826,6 +3826,83 @@ bool AbstractClient::wantsShadowToBeRendered() const
     return !isFullScreen() && maximizeMode() != MaximizeFull;
 }
 
+void AbstractClient::setupWindowRules(bool ignore_temporary)
+{
+    disconnect(this, &AbstractClient::captionChanged, this, &AbstractClient::evaluateWindowRules);
+    m_rules = RuleBook::self()->find(this, ignore_temporary);
+    // check only after getting the rules, because there may be a rule forcing window type
 }
 
+void AbstractClient::updateWindowRules(Rules::Types selection)
+{
+    if (RuleBook::self()->areUpdatesDisabled()) {
+        return;
+    }
+    m_rules.update(this, selection);
+}
+
+void AbstractClient::finishWindowRules()
+{
+    updateWindowRules(Rules::All);
+    m_rules = WindowRules();
+}
+
+// Applies Force, ForceTemporarily and ApplyNow rules
+// Used e.g. after the rules have been modified using the kcm.
+void AbstractClient::applyWindowRules()
+{
+    // apply force rules
+    // Placement - does need explicit update, just like some others below
+    // Geometry : setGeometry() doesn't check rules
+    auto client_rules = rules();
+    const QRect oldGeometry = moveResizeGeometry();
+    const QRect geometry = client_rules->checkGeometry(oldGeometry);
+    if (geometry != oldGeometry) {
+        moveResize(geometry);
+    }
+    // MinSize, MaxSize handled by Geometry
+    // IgnoreGeometry
+    setDesktops(desktops());
+    workspace()->sendClientToOutput(this, output());
+    setOnActivities(activities());
+    // Type
+    maximize(maximizeMode());
+    // Minimize : functions don't check, and there are two functions
+    if (client_rules->checkMinimize(isMinimized())) {
+        minimize();
+    } else {
+        unminimize();
+    }
+    setShade(shadeMode());
+    setOriginalSkipTaskbar(skipTaskbar());
+    setSkipPager(skipPager());
+    setSkipSwitcher(skipSwitcher());
+    setKeepAbove(keepAbove());
+    setKeepBelow(keepBelow());
+    setFullScreen(isFullScreen(), true);
+    setNoBorder(noBorder());
+    updateColorScheme();
+    // FSP
+    // AcceptFocus :
+    if (workspace()->mostRecentlyActivatedClient() == this
+        && !client_rules->checkAcceptFocus(true)) {
+        workspace()->activateNextClient(this);
+    }
+    // Autogrouping : Only checked on window manage
+    // AutogroupInForeground : Only checked on window manage
+    // AutogroupById : Only checked on window manage
+    // StrictGeometry
+    setShortcut(rules()->checkShortcut(shortcut().toString()));
+    // see also X11Client::setActive()
+    if (isActive()) {
+        setOpacity(rules()->checkOpacityActive(qRound(opacity() * 100.0)) / 100.0);
+        workspace()->disableGlobalShortcutsForClient(rules()->checkDisableGlobalShortcuts(false));
+    } else {
+        setOpacity(rules()->checkOpacityInactive(qRound(opacity() * 100.0)) / 100.0);
+    }
+    setDesktopFileName(rules()->checkDesktopFile(desktopFileName()).toUtf8());
+}
+
+} // namespace KWin
+
 #include "moc_abstract_client.cpp"
diff --git a/src/kcmkwin/kwinrules/CMakeLists.txt b/src/kcmkwin/kwinrules/CMakeLists.txt
index 1a82ad018d..b199804493 100644
--- a/src/kcmkwin/kwinrules/CMakeLists.txt
+++ b/src/kcmkwin/kwinrules/CMakeLists.txt
@@ -6,10 +6,7 @@ include_directories(../../)
 
 set(kwinrules_SRCS
     ../../rulebooksettings.cpp
-    ../../cursor.cpp
-    ../../backends/x11/standalone/x11cursor.cpp
     ../../rules.cpp
-    ../../placement.cpp
     ../../utils/common.cpp
     ../../virtualdesktopsdbustypes.cpp
     kwinsrc.cpp
diff --git a/src/rules.cpp b/src/rules.cpp
index 4e56b9f58c..02a2a30351 100644
--- a/src/rules.cpp
+++ b/src/rules.cpp
@@ -19,13 +19,12 @@
 #include <kconfig.h>
 
 #ifndef KCMRULES
+#include "abstract_client.h"
 #include "client_machine.h"
 #include "main.h"
 #include "platform.h"
-#include "screens.h"
 #include "virtualdesktops.h"
 #include "workspace.h"
-#include "x11client.h"
 #endif
 
 #include "rulebooksettings.h"
@@ -880,94 +879,6 @@ CHECK_RULE(DesktopFile, QString)
 #undef CHECK_RULE
 #undef CHECK_FORCE_RULE
 
-// Client
-
-void AbstractClient::setupWindowRules(bool ignore_temporary)
-{
-    disconnect(this, &AbstractClient::captionChanged, this, &AbstractClient::evaluateWindowRules);
-    m_rules = RuleBook::self()->find(this, ignore_temporary);
-    // check only after getting the rules, because there may be a rule forcing window type
-}
-
-// Applies Force, ForceTemporarily and ApplyNow rules
-// Used e.g. after the rules have been modified using the kcm.
-void AbstractClient::applyWindowRules()
-{
-    // apply force rules
-    // Placement - does need explicit update, just like some others below
-    // Geometry : setGeometry() doesn't check rules
-    auto client_rules = rules();
-    const QRect oldGeometry = moveResizeGeometry();
-    const QRect geometry = client_rules->checkGeometry(oldGeometry);
-    if (geometry != oldGeometry) {
-        moveResize(geometry);
-    }
-    // MinSize, MaxSize handled by Geometry
-    // IgnoreGeometry
-    setDesktops(desktops());
-    workspace()->sendClientToOutput(this, output());
-    setOnActivities(activities());
-    // Type
-    maximize(maximizeMode());
-    // Minimize : functions don't check, and there are two functions
-    if (client_rules->checkMinimize(isMinimized())) {
-        minimize();
-    } else {
-        unminimize();
-    }
-    setShade(shadeMode());
-    setOriginalSkipTaskbar(skipTaskbar());
-    setSkipPager(skipPager());
-    setSkipSwitcher(skipSwitcher());
-    setKeepAbove(keepAbove());
-    setKeepBelow(keepBelow());
-    setFullScreen(isFullScreen(), true);
-    setNoBorder(noBorder());
-    updateColorScheme();
-    // FSP
-    // AcceptFocus :
-    if (workspace()->mostRecentlyActivatedClient() == this
-        && !client_rules->checkAcceptFocus(true)) {
-        workspace()->activateNextClient(this);
-    }
-    // Autogrouping : Only checked on window manage
-    // AutogroupInForeground : Only checked on window manage
-    // AutogroupById : Only checked on window manage
-    // StrictGeometry
-    setShortcut(rules()->checkShortcut(shortcut().toString()));
-    // see also X11Client::setActive()
-    if (isActive()) {
-        setOpacity(rules()->checkOpacityActive(qRound(opacity() * 100.0)) / 100.0);
-        workspace()->disableGlobalShortcutsForClient(rules()->checkDisableGlobalShortcuts(false));
-    } else {
-        setOpacity(rules()->checkOpacityInactive(qRound(opacity() * 100.0)) / 100.0);
-    }
-    setDesktopFileName(rules()->checkDesktopFile(desktopFileName()).toUtf8());
-}
-
-void X11Client::updateWindowRules(Rules::Types selection)
-{
-    if (!isManaged()) { // not fully setup yet
-        return;
-    }
-    AbstractClient::updateWindowRules(selection);
-}
-
-void AbstractClient::updateWindowRules(Rules::Types selection)
-{
-    if (RuleBook::self()->areUpdatesDisabled()) {
-        return;
-    }
-    m_rules.update(this, selection);
-}
-
-void AbstractClient::finishWindowRules()
-{
-    updateWindowRules(Rules::All);
-    m_rules = WindowRules();
-}
-
-// Workspace
 KWIN_SINGLETON_FACTORY(RuleBook)
 
 RuleBook::RuleBook(QObject *parent)
diff --git a/src/x11client.cpp b/src/x11client.cpp
index 780f581519..33b000350c 100644
--- a/src/x11client.cpp
+++ b/src/x11client.cpp
@@ -318,7 +318,7 @@ void X11Client::releaseWindow(bool on_shutdown)
     if (on_shutdown) {
         // Map the window, so it can be found after another WM is started
         m_client.map();
-    // TODO: Preserve minimized, shaded etc. state?
+        // TODO: Preserve minimized, shaded etc. state?
     } else { // Make sure it's not mapped if the app unmapped it (#65279). The app
         // may do map+unmap before we initially map the window by calling rawShow() from manage().
         m_client.unmap();
@@ -2222,8 +2222,8 @@ void X11Client::getMotifHints()
         // If we just got a hint telling us to hide decorations, we do so.
         if (m_motif.noBorder()) {
             noborder = rules()->checkNoBorder(true);
-        // If the Motif hint is now telling us to show decorations, we only do so if the app didn't
-        // instruct us to hide decorations in some other way, though.
+            // If the Motif hint is now telling us to show decorations, we only do so if the app didn't
+            // instruct us to hide decorations in some other way, though.
         } else if (!app_noborder) {
             noborder = rules()->checkNoBorder(false);
         }
@@ -2877,7 +2877,7 @@ bool X11Client::belongToSameApplication(const X11Client *c1, const X11Client *c2
                && c2->wmClientLeader() != c2->window()) { // don't use in this test then
         same_app = true; // same client leader
 
-    // tests that mean they most probably don't belong together
+        // tests that mean they most probably don't belong together
     } else if ((c1->pid() != c2->pid() && !checks.testFlag(SameApplicationCheck::AllowCrossProcesses))
                || c1->wmClientMachine(false) != c2->wmClientMachine(false)) {
         ; // different processes
@@ -2893,7 +2893,7 @@ bool X11Client::belongToSameApplication(const X11Client *c1, const X11Client *c2
         ; // "different" apps
     } else if (c1->pid() == 0 || c2->pid() == 0) {
         ; // old apps that don't have _NET_WM_PID, consider them different
-    // if they weren't found to match above
+        // if they weren't found to match above
     } else {
         same_app = true; // looks like it's the same app
     }
@@ -4831,6 +4831,14 @@ bool X11Client::supportsWindowRules() const
     return true;
 }
 
+void X11Client::updateWindowRules(Rules::Types selection)
+{
+    if (!isManaged()) { // not fully setup yet
+        return;
+    }
+    AbstractClient::updateWindowRules(selection);
+}
+
 void X11Client::damageNotifyEvent()
 {
     Q_ASSERT(kwinApp()->operationMode() == Application::OperationModeX11);