port screenedge effect to KSvg

Part of https://invent.kde.org/frameworks/ksvg/-/issues/1.

Port the linked usage of Plasma::Svg to KSvg::Svg, still
syncing with the Plasma style.

CMakeLists.txt

@@ -82,7 +82,6 @@ find_package(KF6 ${KF6_MIN_VERSION} REQUIRED COMPONENTS
     I18n
     IdleTime
     Package
-    Plasma
     Service
     Svg
     WidgetsAddons
@@ -136,7 +135,13 @@ add_feature_info("KF6Runner" KF6Runner_FOUND "Enable building of KWin with krunn
 find_package(KF6Kirigami2 ${KF6_MIN_VERSION} CONFIG)
 set_package_properties(KF6Kirigami2 PROPERTIES
     DESCRIPTION "A QtQuick based components set"
-    PURPOSE "Required at runtime for Virtual desktop KCM"
+    PURPOSE "Required at runtime for several QML effects"
+    TYPE RUNTIME
+)
+find_package(KF6Plasma ${KF6_MIN_VERSION} CONFIG)
+set_package_properties(KF6Plasma PROPERTIES
+    DESCRIPTION "A QtQuick based components set"
+    PURPOSE "Required at runtime for several QML effects"
     TYPE RUNTIME
 )
 

src/plugins/screenedge/CMakeLists.txt

@@ -12,5 +12,6 @@ target_link_libraries(screenedge PRIVATE
     kwineffects
     kwinglutils
 
-    KF6::Plasma
+    KF6::Svg
+    KF6::ConfigCore
 )

src/plugins/screenedge/screenedgeeffect.cpp

@@ -13,8 +13,11 @@
 #include "libkwineffects/rendertarget.h"
 #include "libkwineffects/renderviewport.h"
 // KDE
-#include <Plasma/Svg>
+#include <KConfigGroup>
+#include <KSharedConfig>
+#include <KSvg/Svg>
 // Qt
+#include <QFile>
 #include <QPainter>
 #include <QTimer>
 #include <QVector4D>
@@ -45,7 +48,23 @@ ScreenEdgeEffect::~ScreenEdgeEffect()
 void ScreenEdgeEffect::ensureGlowSvg()
 {
     if (!m_glow) {
-        m_glow = new Plasma::Svg(this);
+        m_glow = new KSvg::Svg(this);
+        m_glow->imageSet()->setBasePath(QStringLiteral("plasma/desktoptheme"));
+
+        const QString groupName = QStringLiteral("Theme");
+        KSharedConfig::Ptr config = KSharedConfig::openConfig(QStringLiteral("plasmarc"));
+        KConfigGroup cg = KConfigGroup(config, groupName);
+        m_glow->imageSet()->setImageSetName(cg.readEntry("name", QStringLiteral("default")));
+
+        m_configWatcher = KConfigWatcher::create(config);
+
+        connect(m_configWatcher.data(), &KConfigWatcher::configChanged, this, [this](const KConfigGroup &group, const QByteArrayList &names) {
+            if (group.name() != QStringLiteral("Theme") || !names.contains(QStringLiteral("name"))) {
+                return;
+            }
+            m_glow->imageSet()->setImageSetName(group.readEntry("name", QStringLiteral("default")));
+        });
+
         m_glow->setImagePath(QStringLiteral("widgets/glowbar"));
     }
 }

src/plugins/screenedge/screenedgeeffect.h

@@ -9,8 +9,10 @@
 #pragma once
 #include "libkwineffects/kwineffects.h"
 
+#include <KConfigWatcher>
+
 class QTimer;
-namespace Plasma
+namespace KSvg
 {
 class Svg;
 }
@@ -45,7 +47,8 @@ private:
     QImage createCornerGlow(ElectricBorder border);
     QImage createEdgeGlow(ElectricBorder border, const QSize &size);
     QSize cornerGlowSize(ElectricBorder border);
-    Plasma::Svg *m_glow = nullptr;
+    KConfigWatcher::Ptr m_configWatcher;
+    KSvg::Svg *m_glow = nullptr;
     std::map<ElectricBorder, std::unique_ptr<Glow>> m_borders;
     QTimer *m_cleanupTimer;
 };