quickshell lets gooo

dots/quickshell/modules/drawers/Border.qml

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+import "root:/widgets"
+import "root:/services"
+import "root:/config"
+import Quickshell
+import QtQuick
+import QtQuick.Effects
+
+Item {
+    id: root
+
+    required property Item bar
+
+    anchors.fill: parent
+
+    StyledRect {
+        id: rect
+
+        anchors.fill: parent
+        color: Colours.alpha(Config.border.colour, false)
+        visible: false
+    }
+
+    Item {
+        id: mask
+
+        anchors.fill: parent
+        layer.enabled: true
+        visible: false
+
+        Rectangle {
+            anchors.fill: parent
+            anchors.margins: Config.border.thickness
+            anchors.leftMargin: root.bar.implicitWidth
+            radius: Config.border.rounding
+        }
+    }
+
+    MultiEffect {
+        anchors.fill: parent
+        maskEnabled: true
+        maskInverted: true
+        maskSource: mask
+        source: rect
+        maskThresholdMin: 0.5
+        maskSpreadAtMin: 1
+    }
+}