Add a themed icon name to PlasmaWindow interface

Server can set a themed icon name, client gets it directly turned into a
QIcon. That only works with QGuiApplications as can be seen in the
adjusted paneltest.

src/wayland/plasmawindowmanagement_interface.cpp

@@ -65,6 +65,7 @@ public:
     void createResource(wl_resource *parent);
     void setTitle(const QString &title);
     void setAppId(const QString &appId);
+    void setThemedIconName(const QString &iconName);
     void setVirtualDesktop(quint32 desktop);
     void unmap();
     void setState(org_kde_plasma_window_management_state flag, bool set);
@@ -89,6 +90,7 @@ private:
     PlasmaWindowManagementInterface *wm;
     QString m_title;
     QString m_appId;
+    QString m_themedIconName;
     quint32 m_virtualDesktop = 0;
     quint32 m_state = 0;
     wl_listener listener;
@@ -277,6 +279,7 @@ void PlasmaWindowInterface::Private::createResource(wl_resource *parent)
         org_kde_plasma_window_send_title_changed(resource, m_title.toUtf8().constData());
     }
     org_kde_plasma_window_send_state_changed(resource, m_state);
+    org_kde_plasma_window_send_themed_icon_name_changed(resource, m_themedIconName.toUtf8().constData());
     c->flush();
 }
 
@@ -292,6 +295,18 @@ void PlasmaWindowInterface::Private::setAppId(const QString &appId)
     }
 }
 
+void PlasmaWindowInterface::Private::setThemedIconName(const QString &iconName)
+{
+    if (m_themedIconName == iconName) {
+        return;
+    }
+    m_themedIconName = iconName;
+    const QByteArray utf8 = m_themedIconName.toUtf8();
+    for (auto it = resources.constBegin(); it != resources.constEnd(); ++it) {
+        org_kde_plasma_window_send_themed_icon_name_changed((*it).resource, utf8.constData());
+    }
+}
+
 void PlasmaWindowInterface::Private::setTitle(const QString &title)
 {
     if (m_title == title) {
@@ -481,5 +496,10 @@ void PlasmaWindowInterface::setMinimizeable(bool set)
     d->setState(ORG_KDE_PLASMA_WINDOW_MANAGEMENT_STATE_MINIMIZABLE, set);
 }
 
+void PlasmaWindowInterface::setThemedIconName(const QString &iconName)
+{
+    d->setThemedIconName(iconName);
+}
+
 }
 }

src/wayland/plasmawindowmanagement_interface.h

@@ -82,6 +82,7 @@ public:
     void setMinimizeable(bool set);
     void setMaximizeable(bool set);
     void setFullscreenable(bool set);
+    void setThemedIconName(const QString &iconName);
 
     void unmap();
 

src/wayland/tests/paneltest.cpp

@@ -33,7 +33,7 @@ License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #include "../src/client/shm_pool.h"
 #include "../src/client/surface.h"
 // Qt
-#include <QCoreApplication>
+#include <QGuiApplication>
 #include <QDebug>
 #include <QFile>
 #include <QImage>
@@ -230,6 +230,11 @@ void PanelTest::setupRegistry(Registry *registry)
                             qDebug() << "Window is fullscreenable changed: " << w->isFullscreenable();
                         }
                     );
+                    connect(w, &PlasmaWindow::iconChanged, this,
+                        [w] {
+                            qDebug() << "Window icon changed: " << w->icon().name();
+                        }
+                    );
                 }
             );
         }
@@ -275,7 +280,7 @@ void PanelTest::render()
 
 int main(int argc, char **argv)
 {
-    QCoreApplication app(argc, argv);
+    QGuiApplication app(argc, argv);
     PanelTest client;
     client.init();