Adjust to KDecoration init API returning a bool

Will allow a fallback to client-side decoration when KDecoration init fails.

autotests/integration/fakes/org.kde.kdecoration2/fakedecoration_with_shadows.cpp

@@ -30,7 +30,7 @@ public:
     }
 
 public Q_SLOTS:
-    void init() override
+    bool init() override
     {
         const int shadowSize = 128;
         const int offsetTop = 64;
@@ -52,6 +52,7 @@ public Q_SLOTS:
         decoShadow->setShadow(shadowTexture);
 
         setShadow(decoShadow);
+        return true;
     }
 };
 

src/plugins/kdecorations/aurorae/src/aurorae.cpp

@@ -239,10 +239,9 @@ Decoration::~Decoration()
     Helper::instance().unref();
 }
 
-void Decoration::init()
+bool Decoration::init()
 {
     Helper::instance().rootContext()->setContextProperty(QStringLiteral("decorationSettings"), settings().get());
-    KDecoration2::Decoration::init();
     auto s = settings();
     connect(s.get(), &KDecoration2::DecorationSettings::reconfigured, this, &Decoration::configChanged);
 
@@ -250,7 +249,7 @@ void Decoration::init()
     m_qmlContext->setContextProperty(QStringLiteral("decoration"), this);
     auto component = Helper::instance().component(m_themeName);
     if (!component) {
-        return;
+        return false;
     }
     if (component == Helper::instance().svgComponent()) {
         // load SVG theme
@@ -281,7 +280,7 @@ void Decoration::init()
                 qCWarning(AURORAE) << error;
             }
         }
-        return;
+        return false;
     }
 
     QVariant visualParent = property("visualParent");
@@ -353,6 +352,7 @@ void Decoration::init()
             setShadow(s);
         }
     }
+    return true;
 }
 
 QVariant Decoration::readConfig(const QString &key, const QVariant &defaultValue)

src/plugins/kdecorations/aurorae/src/aurorae.h

@@ -44,7 +44,7 @@ public:
     QQuickItem *item() const;
 
 public Q_SLOTS:
-    void init() override;
+    bool init() override;
     void installTitleItem(QQuickItem *item);
 
     void updateShadow();