Add a DBus interface to the highlightWindows effect

The Taskmanager can now activate it this way, instead of using X
atoms. This means it will also work on Wayland.

src/effects/highlightwindow/highlightwindow.cpp

@@ -3,12 +3,15 @@
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2009 Lucas Murray <lmurray@undefinedfire.com>
+    SPDX-FileCopyrightText: 2021 David Redondo <kde@david-redondo.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "highlightwindow.h"
 
+#include <QDBusConnection>
+
 namespace KWin
 {
 
@@ -17,6 +20,7 @@ HighlightWindowEffect::HighlightWindowEffect()
     , m_fadeDuration(animationTime(150))
     , m_monitorWindow(nullptr)
 {
+    // TODO KF6 remove atom support
     m_atom = effects->announceSupportProperty("_KDE_WINDOW_HIGHLIGHT", this);
     connect(effects, &EffectsHandler::windowAdded, this, &HighlightWindowEffect::slotWindowAdded);
     connect(effects, &EffectsHandler::windowClosed, this, &HighlightWindowEffect::slotWindowClosed);
@@ -31,6 +35,17 @@ HighlightWindowEffect::HighlightWindowEffect()
             m_atom = effects->announceSupportProperty("_KDE_WINDOW_HIGHLIGHT", this);
         }
     );
+
+    QDBusConnection::sessionBus().registerObject(QStringLiteral("/org/kde/KWin/HighlightWindow"),
+                                                 QStringLiteral("org.kde.KWin.HighlightWindow"),
+                                                 this,
+                                                 QDBusConnection::ExportScriptableContents);
+    QDBusConnection::sessionBus().registerService(QStringLiteral("org.kde.KWin.HighlightWindow"));
+}
+
+HighlightWindowEffect::~HighlightWindowEffect()
+{
+    QDBusConnection::sessionBus().unregisterService(QStringLiteral("org.kde.KWin.HighlightWindow"));
 }
 
 static bool isInitiallyHidden(EffectWindow* w)
@@ -44,6 +59,20 @@ static bool isHighlightWindow(EffectWindow *window)
     return window->isNormalWindow() || window->isDialog();
 }
 
+void HighlightWindowEffect::highlightWindows(const QStringList &windows)
+{
+    QVector<EffectWindow*> effectWindows;
+    effectWindows.reserve(windows.count());
+    for (const auto &window : windows) {
+        if (auto effectWindow = effects->findWindow(QUuid(window)); effectWindow) {
+            effectWindows.append(effectWindow);
+        } else if (auto effectWindow = effects->findWindow(window.toLong()); effectWindow) {
+             effectWindows.append(effectWindow);
+        }
+    }
+    highlightWindows(effectWindows);
+}
+
 void HighlightWindowEffect::slotWindowAdded(EffectWindow* w)
 {
     if (!m_highlightedWindows.isEmpty()) {

src/effects/highlightwindow/highlightwindow.h

@@ -21,6 +21,7 @@ class HighlightWindowEffect : public AnimationEffect
 
 public:
     HighlightWindowEffect();
+    ~HighlightWindowEffect() override;
 
     int requestedEffectChainPosition() const override {
         return 70;
@@ -28,6 +29,7 @@ public:
 
     bool provides(Feature feature) override;
     bool perform(Feature feature, const QVariantList &arguments) override;
+    Q_SCRIPTABLE void highlightWindows(const QStringList &windows);
 
 public Q_SLOTS:
     void slotWindowAdded(KWin::EffectWindow* w);