add lock.screenshot option to disable blurred desktop background

README.md

@@ -107,6 +107,7 @@ programs.nova-shell.modules = {
   disk.enable        = false;  # the number will only make you anxious
   power.enable       = false;  # if you enjoy living dangerously without a logout button
   lock.enable        = false;  # if you prefer your session unlocked and your secrets free
+  lock.screenshot    = false;  # disable blurred desktop screenshot background
   lock.mpris         = false;  # hide media controls on the lock screen
   lock.volume        = false;  # hide volume slider on the lock screen
 

nix/hm-module.nix

@@ -101,6 +101,11 @@ in
       simpleModules
       // {
         lock = moduleOpt "lock" {
+          screenshot = lib.mkOption {
+            type = lib.types.bool;
+            default = true;
+            description = "Show blurred desktop screenshot as lock screen background.";
+          };
           mpris = lib.mkOption {
             type = lib.types.bool;
             default = true;

shell/lock/LockSurface.qml

@@ -15,12 +15,19 @@ WlSessionLockSurface {
 
     color: M.Theme.base00
 
+    property real _bgOpacity: 0
+    NumberAnimation on _bgOpacity {
+        to: 1
+        duration: 400
+        easing.type: Easing.OutCubic
+    }
+
     // Blur screenshot of desktop as background
     ScreencopyView {
-        id: background
         anchors.fill: parent
         captureSource: root.screen
-        opacity: 0
+        opacity: root._bgOpacity
+        visible: M.Modules.lock.screenshot ?? true
 
         layer.enabled: true
         layer.effect: MultiEffect {
@@ -29,19 +36,13 @@ WlSessionLockSurface {
             blur: 1
             blurMax: 64
         }
-
-        NumberAnimation on opacity {
-            to: 1
-            duration: 400
-            easing.type: Easing.OutCubic
-        }
     }
 
     // Dim overlay
     Rectangle {
         anchors.fill: parent
         color: Qt.rgba(M.Theme.base00.r, M.Theme.base00.g, M.Theme.base00.b, 0.4)
-        opacity: background.opacity
+        opacity: root._bgOpacity
     }
 
     // Hex wave overlay
@@ -49,15 +50,7 @@ WlSessionLockSurface {
         id: hexWave
         anchors.fill: parent
         running: root.lock.secure
-        opacity: background.opacity * 0.4
-
-        NumberAnimation on opacity {
-            id: _hexFadeIn
-            running: false
-            to: 0.4
-            duration: 600
-            easing.type: Easing.OutCubic
-        }
+        opacity: root._bgOpacity * 0.4
     }
 
     // Keyboard input via TextInput - engages Qt's full input pipeline including
@@ -300,15 +293,8 @@ WlSessionLockSurface {
                 easing.type: Easing.InCubic
             }
             NumberAnimation {
-                target: background
-                property: "opacity"
-                to: 0
-                duration: 300
-                easing.type: Easing.InCubic
-            }
-            NumberAnimation {
-                target: hexWave
-                property: "opacity"
+                target: root
+                property: "_bgOpacity"
                 to: 0
                 duration: 300
                 easing.type: Easing.InCubic

shell/services/Modules.qml

@@ -94,6 +94,7 @@ QtObject {
         })
     property var lock: ({
             enable: true,
+            screenshot: true,
             mpris: true,
             volume: true
         })