Merge branch 'main' into feat/wallpaper-picker-rework

Reviewed-on: #149

.gitea/workflows/python.yml

@@ -1,12 +1,15 @@
 name: Python
 
+env:
+    APT_DEPS: git python3 python3-pip python3-venv python3-gi python3-cairo python3-dbus python3-pyudev python3-psutil python3-evdev python3-yaml python3-xlib python3-pillow gir1.2-gtk-3.0
+
 on:
     pull_request:
 
 jobs:
-    fmt:
-        runs-on: alpine
-        container: node:26-alpine
+    static:
+        runs-on: debian
+        container: node:26-trixie-slim
 
         steps:
             - name: Checkout
@@ -14,10 +17,8 @@ jobs:
 
             - name: Install tools
               run: |
-                  apk add --no-cache \
-                    git \
-                    python3 \
-                    py3-pip
+                  apt-get update
+                  apt-get install -y --no-install-recommends git python3 python3-pip python3-venv
                   python3 -m venv .venv
                   . .venv/bin/activate
                   pip install --no-cache-dir ruff
@@ -27,32 +28,15 @@ jobs:
                   . .venv/bin/activate
                   ruff format --check .
 
-    lint:
-        runs-on: alpine
-        container: node:26-alpine
-
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
-
-            - name: Install tools
-              run: |
-                  apk add --no-cache \
-                    git \
-                    python3 \
-                    py3-pip
-                  python3 -m venv .venv
-                  . .venv/bin/activate
-                  pip install --no-cache-dir ruff
-
             - name: Lint
               run: |
                   . .venv/bin/activate
                   ruff check .
 
-    test:
-        runs-on: alpine
-        container: node:26-alpine
+    verify:
+        if: always()
+        runs-on: debian
+        container: node:26-trixie-slim
 
         steps:
             - name: Checkout
@@ -60,20 +44,16 @@ jobs:
 
             - name: Install tools
               run: |
-                  apk add --no-cache \
-                    git \
-                    python3 \
-                    py3-pip \
-                    py3-pillow \
-                    build-base
-                  python3 -m venv .venv
+                  apt-get update
+                  apt-get install -y --no-install-recommends $APT_DEPS build-essential python3-dev
+                  python3 -m venv --system-site-packages .venv
                   . .venv/bin/activate
-                  pip install --no-cache-dir \
-                    typer \
-                    pillow \
-                    materialyoucolor \
-                    jinja2 \
-                    pytest
+                  pip install --no-cache-dir basedpyright nuitka .
+
+            - name: Type check
+              run: |
+                  . .venv/bin/activate
+                  basedpyright
 
             - name: Test
               run: |
@@ -81,52 +61,7 @@ jobs:
                   cd cli
                   python -m pytest tests/ -v
 
-    typecheck:
-        runs-on: alpine
-        container: node:26-alpine
-
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
-
-            - name: Install tools
-              run: |
-                  apk add --no-cache \
-                      git \
-                      python3 \
-                      py3-pip
-                  python3 -m venv .venv
-                  . .venv/bin/activate
-                  pip install --no-cache-dir basedpyright typer pillow materialyoucolor jinja2
-
-            - name: Type check
-              run: |
-                  . .venv/bin/activate
-                  basedpyright
-
-    buildcheck:
-        runs-on: alpine
-        container: node:26-alpine
-
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
-
-            - name: Install tools
-              run: |
-                  apk add --no-cache \
-                    git \
-                    python3 \
-                    py3-pip \
-                    build-base \
-                    python3-dev \
-                    gcc \
-                    g++
-                  python3 -m venv .venv
-                  . .venv/bin/activate
-                  pip install --no-cache-dir nuitka
-
             - name: Nuitka module check
               run: |
                   . .venv/bin/activate
-                  nuitka --module --include-package=zshell cli/src/zshell/
+                  nuitka --module --include-package=zshell cli/src/zshell/

.gitignore

@@ -16,3 +16,5 @@ dist/
 **/test-plugins/
 **/Charts/
 network-dev/
+**/zshell.build/
+**/zshell.dist/

CMakeLists.txt

@@ -93,6 +93,8 @@ if("shell" IN_LIST ENABLE_MODULES)
 				${NUITKA_EXECUTABLE}
 				--standalone
 				--include-data-dir=${CMAKE_SOURCE_DIR}/cli/src/zshell/assets=zshell/assets
+				--include-package=gi.overrides
+				--include-package-data=solaar
 				--output-dir=${ZSHELL_CLI_BUILD_DIR}
 				--output-filename=zshell-cli
 				${CMAKE_SOURCE_DIR}/cli/src/zshell/

Drawers/Exclusions.qml

@@ -1,6 +1,7 @@
 pragma ComponentBehavior: Bound
 
 import Quickshell
+import Quickshell.Wayland
 import QtQuick
 import ZShell.Config
 import qs.Components
@@ -15,6 +16,9 @@ Scope {
 	ExclusionZone {
 		id: top
 
+		WlrLayershell.layer: WlrLayer.Overlay
+		anchors.left: true
+		anchors.right: true
 		anchors.top: true
 		hasBar: root.geometry.barOnTop
 	}

Drawers/Interactions.qml

@@ -162,6 +162,19 @@ Item {
 		}
 	}
 
+	Timer {
+		id: unhideTimer
+
+		interval: Config.bar.revealDelay
+		repeat: false
+		running: false
+
+		onTriggered: {
+			if (hoverHandler.hovered)
+				root.bar.isHovered = true;
+		}
+	}
+
 	HoverHandler {
 		id: hoverHandler
 
@@ -178,7 +191,7 @@ Item {
 					root.popouts.hasCurrent = false;
 				}
 
-				if (Config.bar.autoHide)
+				if (Config.bar.autoHide || root.bar.fullscreen)
 					root.bar.isHovered = false;
 			}
 		}
@@ -200,6 +213,9 @@ Item {
 			if (!root.visibilities.bar && Config.bar.autoHide && root.geometry.barContains(x, y, true))
 				root.bar.isHovered = true;
 
+			if (root.bar.fullscreen && !root.bar.isHovered)
+				unhideTimer.start();
+
 			if (root.panels.sidebar.offsetScale === 1) {
 				const showOsd = root.inRightPanel(root.panels.osdWrapper, x, y);
 

Drawers/Windows.qml

@@ -51,7 +51,7 @@ CustomWindow {
 	readonly property HyprlandMonitor monitor: Hypr.monitorFor(screen)
 	property var root: Quickshell.shellDir
 	readonly property real sdfBorderOffset: 2 * fsTransitionProg
-	readonly property real shadowOpacity: 0.7 * (1 - fsTransitionProg)
+	readonly property real shadowOpacity: 0.7 * (1 - (bar.isHovered ? 0 : fsTransitionProg))
 	property color surfaceColor: Colors.tPalette.m3surface
 
 	WlrLayershell.exclusionMode: ExclusionMode.Ignore
@@ -59,7 +59,7 @@ CustomWindow {
 	WlrLayershell.layer: (fsTransitionProg > 0 && Config.general.showOverFullscreen) || (hasSpecialWorkspace && hasFullscreenOnNormalWs) ? WlrLayer.Overlay : WlrLayer.Top
 	color: "transparent"
 	contentItem.focus: true
-	mask: visibilities.isDrawing ? null : (hasFullscreen ? emptyRegion : regions)
+	mask: visibilities.isDrawing ? null : (hasFullscreen && !bar.isHovered ? emptyRegion : regions)
 	name: "Bar"
 
 	Behavior on fsTransitionProg {
@@ -118,6 +118,12 @@ CustomWindow {
 			x: root.width - width
 			y: panels.osdWrapper.y + bar.implicitHeight
 		}
+
+		Region {
+			height: geometry.horizontal ? 1 : root.screen.height
+			width: geometry.horizontal ? root.screen.width : 1
+			y: geometry.position === "bottom" ? root.screen.height - 1 : 0
+		}
 	}
 
 	Regions {

Helpers/Battery.qml

@@ -1,35 +1,63 @@
 pragma Singleton
 
 import Quickshell
+import Quickshell.Io
 import Quickshell.Services.UPower
 import ZShell.Config
 import qs.Services
+import qs.Paths
 
 Singleton {
 	id: root
 
-	readonly property var colors: {
-		if (deviceState === UPowerDeviceState.Charging || deviceState === UPowerDeviceState.FullyCharged)
+	readonly property list<var> allPeripherals: [...logiDevices, ...upowerDevices.filter(d => !Battery.logiDevices.some(l => l.nativePath === d.nativePath))]
+	readonly property real currentPerc: UPower.displayDevice.percentage
+	readonly property var deviceState: UPower.displayDevice.state
+	readonly property string deviceStateString: UPowerDeviceState.toString(deviceState)
+	readonly property bool isLaptop: UPower.displayDevice.isLaptopBattery
+	readonly property alias logiDevices: adapter.devices
+	readonly property var lowestPeripheral: allPeripherals.reduce((lowest, current) => current.percentage < lowest.percentage ? current : lowest)
+	readonly property bool onBattery: UPower.onBattery
+	readonly property bool ready: UPower.displayDevice.ready
+	readonly property real timeToEmpty: UPower.displayDevice.timeToEmpty
+	readonly property real timeToFull: UPower.displayDevice.timeToFull
+	readonly property list<UPowerDevice> upowerDevices: UPower.devices.values.filter(d => d.state !== UPowerDeviceState.Unknown)
+
+	function getColors(percentage: real, state: string): var {
+		if (state === "charging" || state === "full" || state === "recharging")
 			return {
 				fg: Colors.swapRG(Colors.palette.m3error),
 				bg: Colors.swapRG(Colors.palette.m3onError)
 			};
-		else if (currentPerc <= 0.2)
+		else if (percentage <= 0.2)
 			return {
 				fg: Colors.palette.m3error,
 				bg: Colors.palette.m3onError
 			};
 		else
 			return {
-				fg: Colors.palette.m3onSurface,
-				bg: Colors.palette.m3surface
+				fg: Colors.palette.m3tertiary,
+				bg: Colors.palette.m3onTertiary
 			};
 	}
-	readonly property real currentPerc: UPower.displayDevice.percentage
-	readonly property var deviceState: UPower.displayDevice.state
-	readonly property bool isLaptop: UPower.displayDevice.isLaptopBattery
-	readonly property bool onBattery: UPower.onBattery
-	readonly property bool ready: UPower.displayDevice.ready
-	readonly property real timeToEmpty: UPower.displayDevice.timeToEmpty
-	readonly property real timeToFull: UPower.displayDevice.timeToFull
+
+	function startDaemon(): void {
+		Quickshell.execDetached(["zshell-cli", "battery", "daemon"]);
+	}
+
+	FileView {
+		id: fileView
+
+		path: `${Paths.cache}/battery.json`
+		watchChanges: true
+
+		onFileChanged: reload()
+
+		JsonAdapter {
+			id: adapter
+
+			property list<var> devices: []
+			property real updated: 0.0
+		}
+	}
 }

Helpers/Updates.qml

@@ -11,8 +11,8 @@ Singleton {
 	id: root
 
 	property int availableUpdates: 0
-	property string cmd: ""
 	property bool commandReady
+	property bool hasHelper
 	property bool loaded
 	property double now: Date.now()
 	property var updates: ({})
@@ -38,18 +38,12 @@ Singleton {
 	}
 
 	function performPackageUpdate(pkg: string): void {
-		if (root.cmd === "pacman")
-			pkgUpdateProc.command = ["pkexec", root.cmd, "--noconfirm", "-Sy", pkg];
-		else
-			pkgUpdateProc.command = [root.cmd, "--noconfirm", "--sudo", "pkexec", "-Sy", pkg];
+		pkgUpdateProc.command = ["pkexec", "pacman", "--noconfirm", "-Sy", pkg];
 		pkgUpdateProc.running = true;
 	}
 
 	function performSystemUpdate(): void {
-		if (root.cmd === "pacman")
-			sysUpdateProc.command = ["pkexec", root.cmd, "--noconfirm", "-Syu"];
-		else
-			sysUpdateProc.command = [root.cmd, "--noconfirm", "--sudo", "pkexec", "-Syu"];
+		sysUpdateProc.command = ["pkexec", "pacman", "--noconfirm", "-Syu"];
 		sysUpdateProc.running = true;
 	}
 
@@ -87,7 +81,7 @@ Singleton {
 	Process {
 		id: cmdDetect
 
-		command: ["sh", "-c", "command -v checkupdates || command -v yay || command -v paru"]
+		command: ["sh", "-c", "command -v checkupdates"]
 		running: true
 
 		stdout: StdioCollector {
@@ -96,47 +90,20 @@ Singleton {
 				let helper;
 
 				if (cmd.length > 0) {
-					helper = cmd.split("/").pop();
+					helper = true;
 				} else {
-					helper = "pacman";
-				}
-
-				if (helper === "checkupdates") {
-					updatesProc.command = [helper];
-				} else {
-					updatesProc.command = [helper, "-Qu"];
+					helper = false;
 				}
+				root.hasHelper = helper;
 				root.commandReady = true;
 			}
 		}
 	}
 
-	Process {
-		id: updateCmdDetect
-
-		command: ["sh", "-c", "command -v yay || command -v paru"]
-		running: true
-
-		stdout: StdioCollector {
-			onStreamFinished: {
-				const cmd = this.text.trim();
-				let helper;
-
-				if (cmd.length > 0) {
-					helper = cmd.split("/").pop();
-				} else {
-					helper = "pacman";
-				}
-
-				root.cmd = helper;
-			}
-		}
-	}
-
 	Process {
 		id: updatesProc
 
-		command: []
+		command: root.hasHelper ? ["checkupdates"] : []
 		running: false
 
 		stdout: StdioCollector {

Modules/Bar/Bar.qml

@@ -12,6 +12,7 @@ GridLayout {
 
 	required property bool fullscreen
 	required property bool horizontal
+	required property bool isHovered
 	required property Wrapper popouts
 	required property ClipWrapper popoutsWrapper
 	required property ShellScreen screen
@@ -92,7 +93,7 @@ GridLayout {
 				delegate: EntryWrapper {
 					HyprsunsetWidget {
 						horizontal: root.horizontal
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -113,7 +114,7 @@ GridLayout {
 					Workspaces {
 						horizontal: root.horizontal
 						screen: root.screen
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -126,7 +127,7 @@ GridLayout {
 						horizontal: root.horizontal
 						loader: root
 						popouts: root.popouts
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -137,6 +138,7 @@ GridLayout {
 				delegate: EntryWrapper {
 					StatusIcons {
 						horizontal: root.horizontal
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -148,7 +150,7 @@ GridLayout {
 					Resources {
 						horizontal: root.horizontal
 						visibilities: root.visibilities
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -159,7 +161,7 @@ GridLayout {
 				delegate: EntryWrapper {
 					UpdatesWidget {
 						horizontal: root.horizontal
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -172,7 +174,7 @@ GridLayout {
 						horizontal: root.horizontal
 						popouts: root.popouts
 						visibilities: root.visibilities
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -186,7 +188,7 @@ GridLayout {
 						loader: root
 						popouts: root.popouts
 						visibilities: root.visibilities
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -198,7 +200,7 @@ GridLayout {
 					WindowTitle {
 						bar: root
 						horizontal: root.horizontal
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}
@@ -218,7 +220,7 @@ GridLayout {
 				delegate: EntryWrapper {
 					MediaWidget {
 						horizontal: root.horizontal
-						visible: !root.fullscreen
+						visible: !root.fullscreen || root.isHovered
 					}
 				}
 			}

Modules/Bar/BarLoader.qml

@@ -21,7 +21,7 @@ Item {
 	required property ClipWrapper popoutsWrapper
 	required property string position
 	required property ShellScreen screen
-	readonly property bool shouldBeVisible: !fullscreen && (!Config.bar.autoHide || visibilities.bar || isHovered)
+	readonly property bool shouldBeVisible: (!fullscreen && (!Config.bar.autoHide || visibilities.bar)) || isHovered
 	readonly property int vPadding: 6
 	required property PersistentProperties visibilities
 
@@ -79,7 +79,9 @@ Item {
 
 		sourceComponent: Bar {
 			fullscreen: root.fullscreen
+			height: root.contentThickness
 			horizontal: root.horizontal
+			isHovered: root.isHovered
 			popouts: root.popouts
 			popoutsWrapper: root.popoutsWrapper
 			screen: root.screen

Modules/Bar/Components/Common/BatteryIcon.qml

@@ -0,0 +1,85 @@
+import QtQuick
+import ZShell.Config
+import qs.Services
+import qs.Components
+import qs.Helpers
+
+Row {
+	id: root
+
+	property real batHeight: Tokens.padding.smaller * 2
+	property real batWidth: Tokens.padding.larger * 2
+	required property string devState
+	property real nubHeight: Tokens.padding.small
+	property real nubWidth: 2
+	required property real percentage
+	property real radius: Tokens.rounding.smallest / 2
+
+	spacing: 1
+
+	CustomRect {
+		id: track
+
+		anchors.verticalCenter: parent.verticalCenter
+		color: Battery.getColors(root.percentage, root.devState).bg
+		height: root.batHeight
+		radius: root.radius
+		width: root.batWidth
+
+		CustomText {
+			color: Battery.getColors(root.percentage, root.devState).fg
+			font.pointSize: Tokens.font.size.larger / 1.5
+			font.weight: 800
+			height: track.height
+			horizontalAlignment: Text.AlignHCenter
+			text: Math.round(root.percentage * 100)
+			verticalAlignment: Text.AlignVCenter
+			width: track.width
+		}
+
+		Item {
+			clip: true
+			width: parent.width * root.percentage
+
+			anchors {
+				bottom: parent.bottom
+				left: parent.left
+				top: parent.top
+			}
+
+			CustomRect {
+				id: fill
+
+				color: Battery.getColors(root.percentage, root.devState).fg
+				height: track.height
+				radius: track.radius
+				width: track.width
+
+				CustomText {
+					id: batteryLabel
+
+					clip: true
+					color: Battery.getColors(root.percentage, root.devState).bg
+					font.pointSize: Tokens.font.size.larger / 1.5
+					font.weight: 800
+					height: track.height
+					horizontalAlignment: Text.AlignHCenter
+					text: Math.round(root.percentage * 100)
+					verticalAlignment: Text.AlignVCenter
+					width: track.width
+				}
+			}
+		}
+	}
+
+	CustomRect {
+		id: nub
+
+		anchors.verticalCenter: parent.verticalCenter
+		bottomRightRadius: 20
+		color: root.percentage < 0.99 ? track.color : fill.color
+		height: root.nubHeight
+		topRightRadius: 20
+		width: root.nubWidth
+	}
+}

Modules/Bar/Components/StatusIcons.qml

@@ -112,7 +112,6 @@ WidgetBase {
 						name: "upower"
 
 						UPowerWidget {
-							horizontal: root.horizontal
 						}
 					}
 				}

Modules/Bar/Components/StatusIcons/UPowerWidget.qml

@@ -2,16 +2,17 @@ import Quickshell.Services.UPower
 import QtQuick
 import QtQuick.Layouts
 import ZShell.Config
+import qs.Modules.Bar.Components.Common
 import qs.Components
 import qs.Helpers
 
 Item {
 	id: root
 
-	required property bool horizontal
+	readonly property Item currentItem: batteryIconLoader?.item ?? peripheralIconLoader?.item ?? upowerIconLoader.item
 
-	implicitHeight: Battery.isLaptop ? batteryIconLoader.item.implicitHeight : upowerIconLoader.item.implicitHeight
-	implicitWidth: Battery.isLaptop ? batteryIconLoader.item.implicitWidth : upowerIconLoader.item.implicitWidth
+	implicitHeight: currentItem?.implicitHeight ?? 0
+	implicitWidth: currentItem?.implicitWidth ?? 0
 
 	Behavior on Layout.preferredHeight {
 		Anim {
@@ -30,95 +31,36 @@ Item {
 		}
 	}
 
+	Component.onCompleted: Battery.startDaemon()
+
 	Loader {
 		id: batteryIconLoader
 
 		active: Battery.isLaptop
 		anchors.centerIn: parent
 
-		sourceComponent: Row {
-			id: batteryIcon
+		sourceComponent: BatteryIcon {
+			devState: Battery.deviceStateString
+			percentage: Battery.currentPerc
+		}
+	}
 
-			property real batHeight: 16
-			property real batWidth: 30
-			property real nubHeight: 6
-			property real nubWidth: 2
-			property real radius: Tokens.rounding.smallest / 2
+	Loader {
+		id: peripheralIconLoader
 
-			spacing: 1
+		active: (Battery.lowestPeripheral?.isPresent ?? false) && !batteryIconLoader.active
+		anchors.centerIn: parent
 
-			CustomRect {
-				id: track
-
-				anchors.verticalCenter: parent.verticalCenter
-				color: Battery.colors.bg
-				height: batteryIcon.batHeight
-				radius: batteryIcon.radius
-				width: batteryIcon.batWidth
-
-				CustomText {
-					color: Battery.colors.fg
-					font.pointSize: Tokens.font.size.larger / 1.5
-					font.weight: 800
-					height: track.height
-					horizontalAlignment: Text.AlignHCenter
-					text: Math.round(Battery.currentPerc * 100)
-					verticalAlignment: Text.AlignVCenter
-					width: track.width
-				}
-
-				Item {
-					clip: true
-					width: parent.width * Battery.currentPerc
-
-					anchors {
-						bottom: parent.bottom
-						left: parent.left
-						top: parent.top
-					}
-
-					CustomRect {
-						id: fill
-
-						color: Battery.colors.fg
-						height: track.height
-						radius: track.radius
-						width: track.width
-
-						CustomText {
-							id: batteryLabel
-
-							clip: true
-							color: Battery.colors.bg
-							font.pointSize: 7.5
-							font.weight: 800
-							height: track.height
-							horizontalAlignment: Text.AlignHCenter
-							text: Math.round(Battery.currentPerc * 100)
-							verticalAlignment: Text.AlignVCenter
-							width: track.width
-						}
-					}
-				}
-			}
-
-			CustomRect {
-				id: nub
-
-				anchors.verticalCenter: parent.verticalCenter
-				bottomRightRadius: 20
-				color: Battery.currentPerc < 0.99 ? track.color : fill.color
-				height: batteryIcon.nubHeight
-				topRightRadius: 20
-				width: batteryIcon.nubWidth
-			}
+		sourceComponent: BatteryIcon {
+			devState: Battery.lowestPeripheral?.state ?? ""
+			percentage: Battery.lowestPeripheral?.percentage ?? 0
 		}
 	}
 
 	Loader {
 		id: upowerIconLoader
 
-		active: !Battery.isLaptop
+		active: !batteryIconLoader.active && !peripheralIconLoader.active
 		anchors.centerIn: parent
 
 		sourceComponent: MaterialIcon {

Modules/Bar/Popouts/UPowerPopout.qml

@@ -1,8 +1,10 @@
 pragma ComponentBehavior: Bound
 
 import QtQuick
+import QtQuick.Layouts
 import Quickshell.Services.UPower
 import ZShell.Config
+import qs.Modules.Bar.Components.Common
 import qs.Helpers
 import qs.Components
 import qs.Services
@@ -22,6 +24,31 @@ Column {
 		}
 	}
 
+	Repeater {
+		model: Battery.allPeripherals
+
+		RowLayout {
+			id: layout
+
+			required property var modelData
+
+			anchors.left: parent.left
+			anchors.leftMargin: Tokens.padding.normal
+			anchors.right: parent.right
+			anchors.rightMargin: Tokens.padding.normal
+
+			CustomText {
+				Layout.fillWidth: true
+				text: layout.modelData.model
+			}
+
+			BatteryIcon {
+				devState: layout.modelData.state
+				percentage: layout.modelData.percentage
+			}
+		}
+	}
+
 	CustomText {
 		function formatSeconds(s: int, fallback: string): string {
 			const day = Math.floor(s / 86400);
@@ -75,7 +102,7 @@ Column {
 					CustomText {
 						anchors.verticalCenter: parent.verticalCenter
 						color: Colors.palette.m3onError
-						font.family: Appearance.font.family.mono
+						font.family: Config.appearance.font.family.mono
 						text: qsTr("Performance Degraded")
 					}
 

Modules/Bar/Popouts/UpdatesPopout.qml

@@ -78,8 +78,6 @@ CustomClippingRect {
 				required property var modelData
 				readonly property list<string> sections: modelData.update.split(" ")
 
-				// anchors.left: parent.left
-				// anchors.right: parent.right
 				color: Colors.tPalette.m3surfaceContainer
 				implicitHeight: root.itemHeight
 				implicitWidth: 600

Modules/Launcher/AppList.qml

@@ -1,28 +1,36 @@
 pragma ComponentBehavior: Bound
 
-import Quickshell
 import QtQuick
-import qs.Modules.Launcher.Services
-import qs.Modules.Launcher.Items
-import qs.Components
+import Quickshell
 import ZShell.Config
+import qs.Components
 import qs.Services
+import qs.Modules.Launcher.Items
+import qs.Modules.Launcher.Services
 
 CustomListView {
 	id: root
 
+	readonly property string displayState: stateForText(displayText)
+	property string displayText
+	readonly property string requestedState: stateForText(search.text)
 	required property SearchBar search
 	required property PersistentProperties visibilities
 
-	highlightFollowsCurrentItem: false
-	highlightRangeMode: ListView.ApplyRange
-	implicitHeight: (Config.launcher.sizes.itemHeight + spacing) * Math.min(Config.launcher.maxAppsShown, count) - spacing
-	orientation: Qt.Vertical
-	preferredHighlightBegin: 0
-	preferredHighlightEnd: height
-	spacing: Tokens.spacing.small
-	state: {
-		const text = search.text;
+	function resultsForText(text: string): var {
+		switch (stateForText(text)) {
+		case "actions":
+			return Actions.query(text);
+		case "calc":
+			return [0];
+		case "variant":
+			return SchemeVariants.query(text);
+		default:
+			return Apps.search(text);
+		}
+	}
+
+	function stateForText(text: string): string {
 		const prefix = Config.launcher.actionPrefix;
 		if (text.startsWith(prefix)) {
 			for (const action of ["calc", "scheme", "variant"])
@@ -34,6 +42,20 @@ CustomListView {
 
 		return "apps";
 	}
+
+	function syncDisplayText(): void {
+		if (visibilities.launcher && requestedState === displayState)
+			displayText = search.text;
+	}
+
+	highlightFollowsCurrentItem: false
+	highlightRangeMode: ListView.ApplyRange
+	implicitHeight: (Config.launcher.sizes.itemHeight + spacing) * Math.min(Config.launcher.maxAppsShown, count) - spacing
+	orientation: Qt.Vertical
+	preferredHighlightBegin: 0
+	preferredHighlightEnd: height
+	spacing: Tokens.spacing.small
+	state: visibilities.launcher ? requestedState : displayState
 	verticalLayoutDirection: ListView.BottomToTop
 
 	CustomScrollBar.vertical: CustomScrollBar {
@@ -44,19 +66,21 @@ CustomListView {
 
 		Anim {
 			from: 0
-			properties: "opacity,scale"
+			property: "opacity"
 			to: 1
+			type: Anim.DefaultEffects
 		}
 	}
 	addDisplaced: Transition {
 		Anim {
-			duration: Tokens.anim.durations.small
 			property: "y"
+			type: Anim.StandardSmall
 		}
 
 		Anim {
-			properties: "opacity,scale"
+			property: "opacity"
 			to: 1
+			type: Anim.DefaultEffects
 		}
 	}
 	displaced: Transition {
@@ -65,8 +89,9 @@ CustomListView {
 		}
 
 		Anim {
-			properties: "opacity,scale"
+			property: "opacity"
 			to: 1
+			type: Anim.DefaultEffects
 		}
 	}
 	highlight: CustomRect {
@@ -85,7 +110,7 @@ CustomListView {
 		}
 	}
 	model: ScriptModel {
-		id: model
+		values: root.resultsForText(root.displayText)
 
 		onValuesChanged: root.currentIndex = 0
 	}
@@ -95,8 +120,9 @@ CustomListView {
 		}
 
 		Anim {
-			properties: "opacity,scale"
+			property: "opacity"
 			to: 1
+			type: Anim.DefaultEffects
 		}
 	}
 	remove: Transition {
@@ -104,8 +130,9 @@ CustomListView {
 
 		Anim {
 			from: 1
-			properties: "opacity,scale"
+			property: "opacity"
 			to: 0
+			type: Anim.DefaultEffects
 		}
 	}
 	states: [
@@ -113,7 +140,6 @@ CustomListView {
 			name: "apps"
 
 			PropertyChanges {
-				model.values: Apps.search(search.text)
 				root.delegate: appItem
 			}
 		},
@@ -121,7 +147,6 @@ CustomListView {
 			name: "actions"
 
 			PropertyChanges {
-				model.values: Actions.query(search.text)
 				root.delegate: actionItem
 			}
 		},
@@ -129,7 +154,6 @@ CustomListView {
 			name: "calc"
 
 			PropertyChanges {
-				model.values: [0]
 				root.delegate: calcItem
 			}
 		},
@@ -137,7 +161,6 @@ CustomListView {
 			name: "variant"
 
 			PropertyChanges {
-				model.values: SchemeVariants.query(search.text)
 				root.delegate: variantItem
 			}
 		}
@@ -147,7 +170,7 @@ CustomListView {
 			ParallelAnimation {
 				Anim {
 					duration: Tokens.anim.durations.small
-					easing.bezierCurve: Tokens.anim.curves.expressiveEffects
+					easing.bezierCurve: Tokens.anim.curves.standardAccel
 					from: 1
 					property: "opacity"
 					target: root
@@ -156,7 +179,7 @@ CustomListView {
 
 				Anim {
 					duration: Tokens.anim.durations.small
-					easing.bezierCurve: Tokens.anim.curves.expressiveEffects
+					easing.bezierCurve: Tokens.anim.curves.standardAccel
 					from: 1
 					property: "scale"
 					target: root
@@ -165,14 +188,24 @@ CustomListView {
 			}
 
 			PropertyAction {
-				properties: "values,delegate"
-				targets: [model, root]
+				property: "delegate"
+				target: root
+				value: null
+			}
+
+			ScriptAction {
+				script: root.displayText = root.search.text
+			}
+
+			PropertyAction {
+				property: "delegate"
+				target: root
 			}
 
 			ParallelAnimation {
 				Anim {
 					duration: Tokens.anim.durations.small
-					easing.bezierCurve: Tokens.anim.curves.expressiveEffects
+					easing.bezierCurve: Tokens.anim.curves.standardDecel
 					from: 0
 					property: "opacity"
 					target: root
@@ -181,7 +214,7 @@ CustomListView {
 
 				Anim {
 					duration: Tokens.anim.durations.small
-					easing.bezierCurve: Tokens.anim.curves.expressiveEffects
+					easing.bezierCurve: Tokens.anim.curves.standardDecel
 					from: 0.9
 					property: "scale"
 					target: root
@@ -197,6 +230,8 @@ CustomListView {
 		}
 	}
 
+	Component.onCompleted: displayText = search.text
+
 	Component {
 		id: appItem
 
@@ -228,4 +263,20 @@ CustomListView {
 			list: root
 		}
 	}
+
+	Connections {
+		function onTextChanged() {
+			root.syncDisplayText();
+		}
+
+		target: root.search
+	}
+
+	Connections {
+		function onLauncherChanged() {
+			root.syncDisplayText();
+		}
+
+		target: root.visibilities
+	}
 }

Modules/Launcher/CarouselView.qml

@@ -0,0 +1,53 @@
+import Quickshell
+import QtQuick
+import ZShell.Components
+import ZShell.Config
+import qs.Modules.Launcher.Items
+import qs.Components
+import qs.Helpers
+
+CarouselView {
+	id: root
+
+	required property var panels
+	readonly property var screen: QsWindow.window?.screen
+	required property SearchBar search
+	readonly property var values: Wallpapers.query(root.search.text.split(" ").slice(1).join(" "))
+	required property var visibilities
+
+	delegateProperties: ({
+			visibilities: root.visibilities
+		})
+	focalWidth: Config.launcher.sizes.wallpaperWidth
+	glideDuration: 250
+	glideEasingType: Easing.OutCubic
+	implicitHeight: tileHeight + Tokens.spacing.small / 2 + Tokens.padding.large + Tokens.padding.normal
+	itemSpacing: Tokens.spacing.small
+	maxWidth: {
+		if (!screen)
+			return 0;
+		const barMargins = Config.bar.border * 2;
+		let margins = Math.round(screen.width / 6);
+		if (visibilities.utilities || visibilities.sidebar)
+			margins = Config.sidebar.sizes.width;
+		return screen.width - (barMargins + margins) * 2 - Config.bar.rounding * 4;
+	}
+	minEdgeWidth: 56
+	model: values
+	tileHeight: focalWidth / 16 * 9
+
+	delegate: Component {
+		WallpaperTile {
+		}
+	}
+
+	Component.onCompleted: {
+		const idx = Wallpapers.list.findIndex(w => w.path === Wallpapers.actualCurrent);
+		if (idx >= 0)
+			jumpToIndex(idx);
+	}
+	Component.onDestruction: Wallpapers.stopPreview()
+	onPreviewIndexChanged: (realIndex, modelData) => {
+		Wallpapers.preview(modelData.path);
+	}
+}

Modules/Launcher/ContentList.qml

@@ -110,9 +110,9 @@ Item {
 		anchors.bottom: parent.bottom
 		anchors.horizontalCenter: parent.horizontalCenter
 		anchors.top: parent.top
+		width: root.implicitWidth
 
-		sourceComponent: WallpaperList {
-			content: root.content
+		sourceComponent: CarouselView {
 			panels: root.panels
 			search: root.search
 			visibilities: root.visibilities

Modules/Launcher/Items/WallpaperItem.qml

@@ -1,96 +0,0 @@
-import ZShell.Models
-import Quickshell
-import QtQuick
-import qs.Components
-import qs.Helpers
-import ZShell.Config
-import qs.Modules
-import qs.Services
-
-Item {
-	id: root
-
-	required property FileSystemEntry modelData
-	required property PersistentProperties visibilities
-
-	implicitHeight: image.height + label.height + Tokens.spacing.small / 2 + Tokens.padding.large + Tokens.padding.normal
-	implicitWidth: image.width + Tokens.padding.larger * 2
-	opacity: 0
-	scale: 0.5
-	z: PathView.z ?? 0
-
-	Behavior on opacity {
-		Anim {
-		}
-	}
-	Behavior on scale {
-		Anim {
-		}
-	}
-
-	Component.onCompleted: {
-		scale = Qt.binding(() => PathView.isCurrentItem ? 1 : PathView.onPath ? 0.8 : 0);
-		opacity = Qt.binding(() => PathView.onPath ? 1 : 0);
-	}
-
-	StateLayer {
-		radius: Tokens.rounding.normal
-
-		onClicked: {
-			Wallpapers.setWallpaper(root.modelData.path);
-			root.visibilities.launcher = false;
-		}
-	}
-
-	Elevation {
-		anchors.fill: image
-		level: 4
-		opacity: root.PathView.isCurrentItem ? 1 : 0
-		radius: image.radius
-
-		Behavior on opacity {
-			Anim {
-			}
-		}
-	}
-
-	CustomClippingRect {
-		id: image
-
-		anchors.horizontalCenter: parent.horizontalCenter
-		color: Colors.tPalette.m3surfaceContainer
-		implicitHeight: implicitWidth / 16 * 9
-		implicitWidth: Config.launcher.sizes.wallpaperWidth
-		radius: Tokens.rounding.small
-		y: Tokens.padding.large
-
-		MaterialIcon {
-			anchors.centerIn: parent
-			color: Colors.tPalette.m3outline
-			font.pointSize: Tokens.font.size.extraLarge * 2
-			font.weight: 600
-			text: "image"
-		}
-
-		CachingImage {
-			anchors.fill: parent
-			cache: true
-			path: root.modelData.path
-			smooth: !root.PathView.view.moving
-		}
-	}
-
-	CustomText {
-		id: label
-
-		anchors.horizontalCenter: parent.horizontalCenter
-		anchors.top: image.bottom
-		anchors.topMargin: Tokens.spacing.small / 2
-		elide: Text.ElideRight
-		font.pointSize: Tokens.font.size.normal
-		horizontalAlignment: Text.AlignHCenter
-		renderType: Text.QtRendering
-		text: root.modelData.relativePath
-		width: image.width - Tokens.padding.normal * 2
-	}
-}

Modules/Launcher/Items/WallpaperTile.qml

@@ -0,0 +1,58 @@
+import Quickshell
+import QtQuick
+import ZShell.Config
+import qs.Components
+import qs.Helpers
+import qs.Services
+
+Item {
+	id: root
+
+	required property bool isCurrent
+	required property var modelData // FileSystemEntry-like {path, relativePath}
+	required property real tileHeight
+	required property real tileWidth
+	required property PersistentProperties visibilities
+
+	signal requestActivate
+
+	implicitHeight: tileHeight + Tokens.padding.large * 2
+	implicitWidth: tileWidth
+
+	CustomClippingRect {
+		id: image
+
+		anchors.horizontalCenter: parent.horizontalCenter
+		color: Colors.tPalette.m3surfaceContainer
+		implicitHeight: root.tileHeight
+		implicitWidth: root.tileWidth
+		radius: Tokens.rounding.small
+		y: Tokens.padding.large
+
+		MaterialIcon {
+			anchors.centerIn: parent
+			color: Colors.tPalette.m3outline
+			font.pointSize: Tokens.font.size.extraLarge * 2
+			font.weight: 600
+			text: "image"
+		}
+
+		CachingImage {
+			anchors.bottom: parent.bottom
+			anchors.horizontalCenter: parent.horizontalCenter
+			anchors.top: parent.top
+			cache: true
+			fillMode: Image.PreserveAspectCrop
+			height: root.tileHeight
+			path: root.modelData ? root.modelData.path : ""
+			smooth: root.isCurrent
+			sourceSize.height: root.tileHeight
+			sourceSize.width: root.tileHeight * (16 / 9)
+			width: root.tileHeight * (16 / 9)
+		}
+
+		StateLayer {
+			onClicked: root.requestActivate()
+		}
+	}
+}

Modules/Launcher/WallpaperList.qml

@@ -1,93 +0,0 @@
-pragma ComponentBehavior: Bound
-
-import Quickshell
-import QtQuick
-import qs.Components
-import qs.Helpers
-import ZShell.Config
-import qs.Modules.Launcher.Items
-
-PathView {
-	id: root
-
-	required property var content
-	readonly property int itemWidth: Config.launcher.sizes.wallpaperWidth * 0.9 + Tokens.padding.larger * 2
-	readonly property int numItems: {
-		const screen = QsWindow.window?.screen;
-		if (!screen)
-			return 0;
-
-		// Screen width - 4x outer rounding - 2x max side thickness (cause centered)
-		const barMargins = panels.bar.implicitWidth;
-		let outerMargins = 0;
-		if ((visibilities.utilities || visibilities.sidebar) && panels.utilities.implicitWidth > outerMargins)
-			outerMargins = panels.utilities.implicitWidth;
-		const maxWidth = screen.width - Config.bar.rounding * 4 - (barMargins + outerMargins) * 2;
-
-		if (maxWidth <= 0)
-			return 0;
-
-		const maxItemsOnScreen = Math.floor(maxWidth / itemWidth);
-		const visible = Math.min(maxItemsOnScreen, Config.launcher.maxWallpapers, scriptModel.values.length);
-
-		if (visible === 2)
-			return 1;
-		if (visible > 1 && visible % 2 === 0)
-			return visible - 1;
-		return visible;
-	}
-	required property var panels
-	required property SearchBar search
-	required property var visibilities
-
-	cacheItemCount: 4
-	highlightRangeMode: PathView.StrictlyEnforceRange
-	implicitWidth: Math.min(numItems, count) * itemWidth
-	pathItemCount: numItems
-	preferredHighlightBegin: 0.5
-	preferredHighlightEnd: 0.5
-	snapMode: PathView.SnapToItem
-
-	delegate: WallpaperItem {
-		visibilities: root.visibilities
-	}
-	model: ScriptModel {
-		id: scriptModel
-
-		readonly property string search: root.search.text.split(" ").slice(1).join(" ")
-
-		values: Wallpapers.query(search)
-
-		onValuesChanged: root.currentIndex = search ? 0 : values.findIndex(w => w.path === Wallpapers.actualCurrent)
-	}
-	path: Path {
-		startY: root.height / 2
-
-		PathAttribute {
-			name: "z"
-			value: 0
-		}
-
-		PathLine {
-			relativeY: 0
-			x: root.width / 2
-		}
-
-		PathAttribute {
-			name: "z"
-			value: 1
-		}
-
-		PathLine {
-			relativeY: 0
-			x: root.width
-		}
-	}
-
-	Component.onCompleted: currentIndex = Wallpapers.list.findIndex(w => w.path === Wallpapers.actualCurrent)
-	Component.onDestruction: Wallpapers.stopPreview()
-	onCurrentItemChanged: {
-		if (currentItem)
-			Wallpapers.preview(currentItem.modelData.path);
-	}
-}

Modules/Settings/Pages/Panels/BarPanel.qml

@@ -35,7 +35,6 @@ PageBase {
 
 		SelectRow {
 			active: Config.bar.position === "top" ? menuItems[0] : Config.bar.position === "left" ? menuItems[1] : menuItems[2]
-			last: true
 			settingAnchor: "bar-position"
 			subtext: qsTr("Change which edge the bar appears on")
 			text: qsTr("Position")
@@ -61,6 +60,28 @@ PageBase {
 			onSelected: item => Config.bar.position = item.value
 		}
 
+		ToggleRow {
+			checked: Config.bar.fullscreenReveal
+			settingAnchor: "bar-fullscreen-reveal"
+			subtext: qsTr("Hover top edge to show bar in fullscreen")
+			text: qsTr("Reveal on edge")
+
+			onToggled: Config.bar.fullscreenReveal = checked
+		}
+
+		SpinRow {
+			from: 0
+			last: true
+			settingAnchor: "bar-reveal-delay"
+			stepSize: 100
+			subtext: qsTr("The delay before bar is revealed when cursor is at edge")
+			text: qsTr("Reveal delay")
+			to: 2000
+			value: Config.bar.revealDelay
+
+			onMoved: v => Config.bar.revealDelay = v
+		}
+
 		// Components
 		SectionHeader {
 			text: qsTr("Components")

Modules/Wallpaper/WallBackground.qml

@@ -5,103 +5,46 @@ import Quickshell.Hyprland
 import QtQuick
 import qs.Components
 import qs.Helpers
-import ZShell.Config
 import ZShell.Internal
 
 Item {
 	id: root
 
-	property bool completed
-	property real cropHeight: displayData?.height ?? 1.0
-	property real cropWidth: displayData?.width ?? 1.0
-	property real cropX: displayData?.x ?? 0.0
-	property real cropY: displayData?.y ?? 0.0
-	property WallpaperImage current
 	readonly property var displayData: Wallpapers.getCrop(screen.name)
 	required property ShellScreen screen
 	property size screenResolution: Qt.size(screen.width * screenScale, screen.height * screenScale)
 	property real screenScale: Hyprland.monitorFor(screen).scale
-	property string source: Wallpapers.current
 
 	anchors.fill: parent
 
-	Component.onCompleted: {
-		Hyprland.refreshMonitors();
+	Component.onCompleted: Hyprland.refreshMonitors()
 
-		if (source)
-			Qt.callLater(() => {
-				current = imgComp.createObject(this, {
-					source
-				});
-				completed = true;
-			});
-	}
-	onSourceChanged: {
-		if (!source)
-			current = null;
-		else
-			current = imgComp.createObject(this, {
-				source: source
-			});
-	}
+	WallpaperImage {
+		id: img
 
-	Component {
-		id: imgComp
+		anchors.fill: parent
+		cropHeight: root.displayData?.height ?? 1.0
+		cropWidth: root.displayData?.width ?? 1.0
+		cropX: root.displayData?.x ?? 0.0
+		cropY: root.displayData?.y ?? 0.0
+		fadeDuration: 150
+		screenResolution: root.screenResolution
+		source: Wallpapers.current
 
-		WallpaperImage {
-			id: img
-
-			anchors.fill: parent
-			cropHeight: root.cropHeight
-			cropWidth: root.cropWidth
-			cropX: root.cropX
-			cropY: root.cropY
-			opacity: 0
-			screenResolution: root.screenResolution
-			source: root.source
-
-			Behavior on cropHeight {
-				Anim {
-					id: heightAnim
-				}
+		Behavior on cropHeight {
+			Anim {
 			}
-			Behavior on cropWidth {
-				Anim {
-					id: widthAnim
-				}
+		}
+		Behavior on cropWidth {
+			Anim {
 			}
-			Behavior on cropX {
-				Anim {
-					id: xAnim
-				}
+		}
+		Behavior on cropX {
+			Anim {
 			}
-			Behavior on cropY {
-				Anim {
-					id: yAnim
-				}
-			}
-			Anim on opacity {
-				id: anim
-
-				from: 0
-				running: false
-				to: 1
-				type: Anim.SlowEffects
-			}
-
-			onStatusChanged: {
-				if (status === Image.Ready) {
-					anim.start();
-				}
-			}
-
-			Timer {
-				id: destroyTimer
-
-				interval: anim.duration * 2
-				running: root.current !== img && root.current?.status === Image.Ready
-
-				onTriggered: Qt.callLater(() => img.destroy())
+		}
+		Behavior on cropY {
+			Anim {
 			}
 		}
 	}

Plugins/ZShell/Components/CMakeLists.txt

@@ -4,6 +4,7 @@ qml_module(ZShell-components
         lazylistview.hpp lazylistview.cpp
 		wavyline.hpp wavyline.cpp
 		buttonrow.hpp buttonrow.cpp
+		carouselview.hpp carouselview.cpp
     LIBRARIES
         Qt::Quick
 )

Plugins/ZShell/Components/carouselview.hpp

@@ -0,0 +1,249 @@
+#pragma once
+
+#include <QElapsedTimer>
+#include <QEasingCurve>
+#include <QList>
+#include <QPointF>
+#include <QQuickItem>
+#include <QQmlComponent>
+#include <QQmlEngine>
+#include <QVariantAnimation>
+#include <QVariantList>
+#include <QVector>
+#include <qtypes.h>
+#include <qvectornd.h>
+
+namespace ZShell::components {
+
+class CarouselView : public QQuickItem {
+	Q_OBJECT
+	QML_ELEMENT
+
+	Q_PROPERTY(
+		QQmlComponent* delegate READ delegate WRITE setDelegate NOTIFY
+			delegateChanged)
+	Q_PROPERTY(QVariantList model READ model WRITE setModel NOTIFY modelChanged)
+
+	Q_PROPERTY(
+		qreal focalWidth READ focalWidth WRITE setFocalWidth NOTIFY
+			focalWidthChanged)
+	Q_PROPERTY(
+		qreal minEdgeWidth READ minEdgeWidth WRITE setMinEdgeWidth NOTIFY
+			minEdgeWidthChanged)
+	Q_PROPERTY(
+		qreal itemSpacing READ itemSpacing WRITE setItemSpacing NOTIFY
+			itemSpacingChanged)
+	Q_PROPERTY(
+		qreal tileHeight READ tileHeight WRITE setTileHeight NOTIFY
+			tileHeightChanged)
+	Q_PROPERTY(
+		qreal maxWidth READ maxWidth WRITE setMaxWidth NOTIFY maxWidthChanged)
+
+	Q_PROPERTY(
+		int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY
+			currentIndexChanged)
+
+	Q_PROPERTY(
+		QQuickItem* currentItem READ currentItem NOTIFY currentItemChanged)
+
+	Q_PROPERTY(
+		int glideDuration READ glideDuration WRITE setGlideDuration NOTIFY
+			glideDurationChanged)
+	Q_PROPERTY(
+		QEasingCurve::Type glideEasingType READ glideEasingType WRITE
+			setGlideEasingType NOTIFY glideEasingTypeChanged)
+
+	Q_PROPERTY(
+		QVariantMap delegateProperties READ delegateProperties WRITE
+			setDelegateProperties NOTIFY delegatePropertiesChanged)
+
+	public:
+	explicit CarouselView(QQuickItem* parent = nullptr);
+	~CarouselView() override;
+
+	QQmlComponent* delegate() const { return m_delegate; }
+	void setDelegate(QQmlComponent* c);
+
+	QVariantList model() const { return m_model; }
+	void setModel(const QVariantList& m);
+
+	qreal focalWidth() const { return m_focalWidth; }
+	void setFocalWidth(qreal v);
+
+	qreal minEdgeWidth() const { return m_minEdgeWidth; }
+	void setMinEdgeWidth(qreal v);
+
+	qreal itemSpacing() const { return m_itemSpacing; }
+	void setItemSpacing(qreal v);
+
+	qreal tileHeight() const { return m_tileHeight; }
+	void setTileHeight(qreal v);
+
+	qreal maxWidth() const { return m_maxWidth; }
+	void setMaxWidth(qreal v);
+
+	int currentIndex() const { return m_currentRealIndex; }
+	void setCurrentIndex(int idx);
+
+	QQuickItem* currentItem() const { return m_currentItem; }
+
+	int glideDuration() const { return m_glideDuration; }
+	void setGlideDuration(int v);
+
+	QEasingCurve::Type glideEasingType() const { return m_glideEasingType; }
+	void setGlideEasingType(QEasingCurve::Type t);
+
+	QVariantMap delegateProperties() const { return m_delegateProperties; }
+	void setDelegateProperties(const QVariantMap& v);
+
+	Q_INVOKABLE void goToIndex(int realIndex);
+	Q_INVOKABLE void incrementCurrentIndex();
+	Q_INVOKABLE void decrementCurrentIndex();
+
+	Q_INVOKABLE void jumpToIndex(int realIndex);
+
+	signals:
+	void delegateChanged();
+	void modelChanged();
+	void focalWidthChanged();
+	void minEdgeWidthChanged();
+	void itemSpacingChanged();
+	void tileHeightChanged();
+	void maxWidthChanged();
+	void currentIndexChanged();
+	void currentItemChanged();
+	void glideDurationChanged();
+	void glideEasingTypeChanged();
+	void delegatePropertiesChanged();
+
+	void activated(int realIndex, QVariant modelData);
+	void previewIndexChanged(int realIndex, QVariant modelData);
+
+	protected:
+	bool childMouseEventFilter(QQuickItem* item, QEvent* event) override;
+
+	void geometryChange(const QRectF& newGeo, const QRectF& oldGeo) override;
+
+	void mousePressEvent(QMouseEvent* event) override;
+	void mouseMoveEvent(QMouseEvent* event) override;
+	void mouseReleaseEvent(QMouseEvent* event) override;
+	void mouseUngrabEvent() override;
+	void wheelEvent(QWheelEvent* event) override;
+
+	private slots:
+	void handleDelegateActivate();
+
+	private:
+	struct Arrangement {
+		int n = 0;
+		qreal width = 0;
+		qreal outerSpacing = 0;
+
+		QVector<qreal> sizes;
+		QVector<qreal> centers;
+
+		qreal effectiveExtraWidth = 0;
+	};
+
+	struct Slot {
+		QQuickItem* item = nullptr;
+		int virtualIndex = 0;
+		int realIndex = -1;
+		bool active = false;
+	};
+
+	struct VelocitySample {
+		qint64 t;
+		qreal x;
+	};
+
+	void rebuildArrangement();
+	void relayout();
+
+	Arrangement arrangementForCount(int n) const;
+
+	int layoutCapacityForWidth(qreal width) const;
+	qreal targetWidthForMaxWidth(qreal maxWidth) const;
+
+	void updateSlotContent(Slot& slot, int virtualIndex);
+
+	void positionSlot(const Slot& slot) const;
+
+	void applyPropertiesToItem(QQuickItem* item, int realIndex) const;
+
+	qreal pitch() const { return m_focalWidth + m_itemSpacing; }
+
+	qreal contentXForIndex(qreal index) const;
+	int indexForContentX(qreal x) const;
+	qreal snapTargetX(qreal x) const;
+
+	void snapToNearest();
+	void glideTo(qreal dest);
+	void cancelAnimations();
+
+	qreal keylineSize(int io) const;
+	qreal sampleSize(qreal childLoc) const;
+	qreal continuousIndex() const;
+
+	int realIndexOf(int virtualIndex) const;
+
+	void updateCurrentIndexFromContentX(bool emitPreview);
+
+	void updateCurrentItem();
+
+	void wrapContentIfNeeded();
+	void centerInstantlyOnReal(int realIndex);
+
+	QQuickItem* acquireItem();
+	void releaseAllItems();
+
+	void addVelocitySample(qint64 t, qreal x);
+	qreal sampledVelocity() const;
+
+	QQmlComponent* m_delegate = nullptr;
+	QVariantList m_model;
+	QVariantMap m_delegateProperties;
+
+	qreal m_focalWidth = 0;
+	qreal m_minEdgeWidth = 56;
+	qreal m_itemSpacing = 8;
+	qreal m_tileHeight = 0;
+	qreal m_maxWidth = 0;
+
+	Arrangement m_arrangement;
+
+	int m_layoutCapacity = 0;
+
+	qreal m_contentX = 0;
+	int m_currentVirtualIndex = 0;
+	int m_currentRealIndex = -1;
+	int m_previewRealIndex = -1;
+
+	QQuickItem* m_currentItem = nullptr;
+
+	int m_centerBlockStart = 0;
+
+	QList<Slot> m_slots;
+
+	int m_glideDuration = 250;
+	QEasingCurve::Type m_glideEasingType = QEasingCurve::OutCubic;
+	QVariantAnimation* m_glideAnim = nullptr;
+
+	bool m_dragging = false;
+	bool m_dragActive = false;
+
+	QPointF m_pressPos;
+	qreal m_pressContentX = 0;
+
+	QElapsedTimer m_dragTimer;
+
+	QVector<VelocitySample> m_velocitySamples;
+	static constexpr qint64 kVelocitySampleWindowMs = 80;
+
+	QVariantAnimation* m_flickAnim = nullptr;
+
+	bool m_initializedLayout = false;
+	bool m_relayoutQueued = false;
+};
+
+} // namespace ZShell::components

Plugins/ZShell/Internal/cachingimagemanager.cpp

@@ -1,5 +1,7 @@
 #include "cachingimagemanager.hpp"
 
+#include <algorithm>
+
 #include <QtQuick/qquickwindow.h>
 #include <qcryptographichash.h>
 #include <qdir.h>
@@ -7,10 +9,27 @@
 #include <qfuturewatcher.h>
 #include <qimagereader.h>
 #include <qpainter.h>
+#include <qthread.h>
+#include <qthreadpool.h>
 #include <qtconcurrentrun.h>
 
 namespace ZShell::internal {
 
+namespace {
+
+QThreadPool* imageIoPool() {
+	static QThreadPool pool;
+	static const bool init = [] {
+		pool.setMaxThreadCount(std::max(2, QThread::idealThreadCount() / 2));
+		return true;
+	}();
+	(void)init;
+
+	return &pool;
+}
+
+} // namespace
+
 qreal CachingImageManager::effectiveScale() const {
 	if (m_item && m_item->window()) {
 		return m_item->window()->devicePixelRatio();
@@ -101,14 +120,13 @@ void CachingImageManager::updateSource() {
 
 void CachingImageManager::updateSource(const QString& path) {
 	if (path.isEmpty() || path == m_shaPath) {
-		// Path is empty or already calculating sha for path
 		return;
 	}
 
 	m_shaPath = path;
 
 	const auto future =
-		QtConcurrent::run(&CachingImageManager::sha256sum, path);
+		QtConcurrent::run(imageIoPool(), &CachingImageManager::sha256sum, path);
 
 	const auto watcher = new QFutureWatcher<QString>(this);
 
@@ -118,7 +136,16 @@ void CachingImageManager::updateSource(const QString& path) {
 		this,
 		[watcher, path, this]() {
 			if (m_path != path) {
-				// Object is destroyed or path has changed, ignore
+				watcher->deleteLater();
+				return;
+			}
+
+			const QString key = watcher->result();
+
+			if (key.isEmpty()) {
+				if (m_shaPath == path) {
+					m_shaPath = QString();
+				}
 				watcher->deleteLater();
 				return;
 			}
@@ -126,19 +153,29 @@ void CachingImageManager::updateSource(const QString& path) {
 			const QSize size = effectiveSize();
 
 			if (!m_item || !size.width() || !size.height()) {
+				if (m_shaPath == path) {
+					m_shaPath = QString();
+				}
 				watcher->deleteLater();
 				return;
 			}
 
 			const QString fillMode = m_item->property("fillMode").toString();
-			// clang-format off
-        const QString filename = QString("%1@%2x%3-%4.png")
-            .arg(watcher->result()).arg(size.width()).arg(size.height())
-            .arg(fillMode == "PreserveAspectCrop" ? "crop" : fillMode == "PreserveAspectFit" ? "fit" : "stretch");
-			// clang-format on
+			const QString filename =
+				QString("%1@%2x%3-%4.png")
+					.arg(key)
+					.arg(size.width())
+					.arg(size.height())
+					.arg(
+						fillMode == "PreserveAspectCrop"  ? "crop"
+						: fillMode == "PreserveAspectFit" ? "fit"
+														  : "stretch");
 
 			const QUrl cache = m_cacheDir.resolved(QUrl(filename));
 			if (m_cachePath == cache) {
+				if (m_shaPath == path) {
+					m_shaPath = QString();
+				}
 				watcher->deleteLater();
 				return;
 			}
@@ -149,6 +186,9 @@ void CachingImageManager::updateSource(const QString& path) {
 			if (!cache.isLocalFile()) {
 				qWarning() << "CachingImageManager::updateSource: cachePath"
 						   << cache << "is not a local file";
+				if (m_shaPath == path) {
+					m_shaPath = QString();
+				}
 				watcher->deleteLater();
 				return;
 			}
@@ -161,7 +201,6 @@ void CachingImageManager::updateSource(const QString& path) {
 				createCache(path, cache.toLocalFile(), fillMode, size);
 			}
 
-			// Clear current running sha if same
 			if (m_shaPath == path) {
 				m_shaPath = QString();
 			}
@@ -170,7 +209,6 @@ void CachingImageManager::updateSource(const QString& path) {
 		});
 
 	watcher->setFuture(future);
-	// NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 QUrl CachingImageManager::cachePath() const {
@@ -182,61 +220,105 @@ void CachingImageManager::createCache(
 	const QString& cache,
 	const QString& fillMode,
 	const QSize& size) const {
-	QThreadPool::globalInstance()->start([path, cache, fillMode, size] {
-		QImage image(path);
+	auto* watcher =
+		new QFutureWatcher<bool>(const_cast<CachingImageManager*>(this));
 
-		if (image.isNull()) {
-			qWarning() << "CachingImageManager::createCache: failed to read"
-					   << path;
-			return;
-		}
+	connect(
+		watcher,
+		&QFutureWatcher<bool>::finished,
+		this,
+		[this, watcher, cache, path]() {
+			if (watcher->result() && m_item && m_path == path &&
+				m_cachePath.toLocalFile() == cache) {
+				m_item->setProperty("source", QUrl::fromLocalFile(cache));
+			}
 
-		image.convertTo(QImage::Format_ARGB32);
+			watcher->deleteLater();
+		});
 
-		if (fillMode == "PreserveAspectCrop") {
-			image = image.scaled(
-				size, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
-		} else if (fillMode == "PreserveAspectFit") {
-			image = image.scaled(
-				size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
-		} else {
-			image = image.scaled(
-				size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
-		}
+	const auto future =
+		QtConcurrent::run(
+			imageIoPool(), [path, cache, fillMode, size]() -> bool {
+				QImageReader reader(path);
 
-		if (fillMode == "PreserveAspectCrop" ||
-			fillMode == "PreserveAspectFit") {
-			QImage canvas(size, QImage::Format_ARGB32);
-			canvas.fill(Qt::transparent);
+				if (reader.supportsOption(QImageIOHandler::ScaledSize)) {
+					const QSize full = reader.size();
+					if (full.isValid() && !full.isEmpty()) {
+						const QSize hint = size * 2;
+						QSize scaled = full;
+						scaled.scale(hint, Qt::KeepAspectRatioByExpanding);
+						scaled = QSize(
+							std::min(scaled.width(), full.width()),
+							std::min(scaled.height(), full.height()));
+						reader.setScaledSize(scaled);
+					}
+				}
 
-			QPainter painter(&canvas);
-			painter.drawImage(
-				(size.width() - image.width()) / 2,
-				(size.height() - image.height()) / 2,
-				image);
-			painter.end();
+				QImage image = reader.read();
 
-			image = canvas;
-		}
+				if (image.isNull()) {
+					qWarning()
+						<< "CachingImageManager::createCache: failed to read"
+						<< path << reader.errorString();
+					return false;
+				}
 
-		const QString parent = QFileInfo(cache).absolutePath();
-		if (!QDir().mkpath(parent) || !image.save(cache)) {
-			qWarning() << "CachingImageManager::createCache: failed to save to"
-					   << cache;
-		}
-	});
+				image.convertTo(QImage::Format_ARGB32);
+
+				if (fillMode == "PreserveAspectCrop") {
+					image = image.scaled(
+						size,
+						Qt::KeepAspectRatioByExpanding,
+						Qt::SmoothTransformation);
+				} else if (fillMode == "PreserveAspectFit") {
+					image = image.scaled(
+						size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+				} else {
+					image = image.scaled(
+						size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+				}
+
+				if (fillMode == "PreserveAspectCrop" ||
+					fillMode == "PreserveAspectFit") {
+					QImage canvas(size, QImage::Format_ARGB32);
+					canvas.fill(Qt::transparent);
+
+					QPainter painter(&canvas);
+					painter.drawImage(
+						(size.width() - image.width()) / 2,
+						(size.height() - image.height()) / 2,
+						image);
+					painter.end();
+
+					image = canvas;
+				}
+
+				const QString parent = QFileInfo(cache).absolutePath();
+				if (!QDir().mkpath(parent) || !image.save(cache)) {
+					qWarning()
+						<< "CachingImageManager::createCache: failed to save to"
+						<< cache;
+					return false;
+				}
+
+				return true;
+			});
+
+	watcher->setFuture(future);
 }
 
 QString CachingImageManager::sha256sum(const QString& path) {
-	QFile file(path);
-	if (!file.open(QIODevice::ReadOnly)) {
-		qWarning() << "CachingImageManager::sha256sum: failed to open" << path;
-		return "";
+	const QFileInfo info(path);
+
+	if (!info.exists() || !info.isFile()) {
+		qWarning() << "CachingImageManager::sha256sum: failed to stat" << path;
+		return QString();
 	}
 
 	QCryptographicHash hash(QCryptographicHash::Sha256);
-	hash.addData(&file);
-	file.close();
+	hash.addData(path.toUtf8());
+	hash.addData(QByteArray::number(info.size()));
+	hash.addData(QByteArray::number(info.lastModified().toMSecsSinceEpoch()));
 
 	return hash.result().toHex();
 }

Plugins/ZShell/Internal/wallpaperimage.cpp

@@ -4,14 +4,31 @@
 #include <QCryptographicHash>
 #include <QDir>
 #include <QFileInfo>
+#include <QImageReader>
 #include <QtConcurrent>
-#include <QSGImageNode>
 #include <QQuickWindow>
 
 namespace ZShell::internal {
 
+QThreadPool* WallpaperImage::loadPool() {
+	static QThreadPool* pool = [] {
+		auto* p = new QThreadPool();
+		p->setMaxThreadCount(4);
+		return p;
+	}();
+	return pool;
+}
+
 WallpaperImage::WallpaperImage(QQuickItem* parent) : QQuickItem(parent) {
 	setFlag(ItemHasContents, true);
+
+	m_loadDebounceTimer.setSingleShot(true);
+	connect(
+		&m_loadDebounceTimer,
+		&QTimer::timeout,
+		this,
+		&WallpaperImage::beginLoad);
+
 	connect(
 		&m_imageWatcher,
 		&QFutureWatcher<QImage>::finished,
@@ -20,12 +37,15 @@ WallpaperImage::WallpaperImage(QQuickItem* parent) : QQuickItem(parent) {
 }
 
 WallpaperImage::~WallpaperImage() {
+	m_requestGeneration->fetch_add(1, std::memory_order_relaxed);
+	m_imageWatcher.disconnect();
+
 	if (m_texture) delete m_texture;
+	if (m_previousTexture) delete m_previousTexture;
 }
 
 void WallpaperImage::setStatus(const Status s) {
 	if (m_status == s) return;
-
 	m_status = s;
 	emit statusChanged();
 }
@@ -36,14 +56,14 @@ void WallpaperImage::setSource(const QUrl& source) {
 	emit sourceChanged();
 
 	setStatus(Loading);
-	loadImage();
+	m_loadDebounceTimer.start(80);
 }
 
 void WallpaperImage::setScreenResolution(const QSize& screenResolution) {
 	if (m_screenResolution == screenResolution) return;
 	m_screenResolution = screenResolution;
 	emit screenResolutionChanged();
-	loadImage();
+	beginLoad();
 }
 
 void WallpaperImage::setZoom(qreal zoom) {
@@ -53,6 +73,13 @@ void WallpaperImage::setZoom(qreal zoom) {
 	update();
 }
 
+void WallpaperImage::setFadeDuration(int ms) {
+	if (ms < 0) ms = 0;
+	if (m_fadeDuration == ms) return;
+	m_fadeDuration = ms;
+	emit fadeDurationChanged();
+}
+
 void WallpaperImage::setCropX(qreal x) {
 	if (qFuzzyCompare(m_cropX, x)) return;
 	m_cropX = x;
@@ -100,143 +127,227 @@ QString WallpaperImage::getCacheFilePath() const {
 	return cachePath + "/" + hash + ".png";
 }
 
-void WallpaperImage::loadImage() {
+void WallpaperImage::beginLoad() {
 	if (m_source.isEmpty()) {
 		setStatus(Null);
 		return;
 	}
 
+	const quint64 requestId =
+		m_requestGeneration->fetch_add(1, std::memory_order_relaxed) + 1;
+
 	QString cacheFile = getCacheFilePath();
 	QString sourceFile = m_source.isLocalFile() ? m_source.toLocalFile()
 												: m_source.toString();
-
-	if (sourceFile.startsWith("qrc:/")) {
-		sourceFile = sourceFile.mid(3);
-	}
+	if (sourceFile.startsWith("qrc:/")) sourceFile = sourceFile.mid(3);
 
 	QSize targetRes = m_screenResolution;
+	auto generation = m_requestGeneration;
+
+	QFuture<QImage> future = QtConcurrent::run(
+		loadPool(),
+		[sourceFile, cacheFile, targetRes, requestId, generation]() -> QImage {
+			auto stale = [&] {
+				return generation->load(std::memory_order_relaxed) != requestId;
+			};
+
+			if (stale()) return QImage();
 
-	QFuture<QImage> future =
-		QtConcurrent::run([sourceFile, cacheFile, targetRes]() -> QImage {
 			if (!targetRes.isEmpty() && !cacheFile.isEmpty() &&
 				QFileInfo::exists(cacheFile)) {
 				QImage cached(cacheFile);
 				if (!cached.isNull()) return cached;
 			}
 
-			QImage original(sourceFile);
+			if (stale()) return QImage();
+
+			QImage original;
+			QImageReader reader(sourceFile);
+			if (!targetRes.isEmpty() &&
+				reader.supportsOption(QImageIOHandler::Size)) {
+				QSize actual = reader.size();
+				if (actual.isValid() &&
+					(actual.width() > targetRes.width() ||
+					 actual.height() > targetRes.height())) {
+					QSize scaledSize =
+						actual.scaled(targetRes, Qt::KeepAspectRatioByExpanding);
+					reader.setScaledSize(scaledSize);
+				}
+				original = reader.read();
+			} else {
+				original = QImage(sourceFile);
+			}
 			if (original.isNull()) return QImage();
 
-			if (targetRes.isEmpty()) {
-				return original;
-			}
+			if (stale()) return QImage();
 
-			if (original.width() > targetRes.width() ||
-				original.height() > targetRes.height()) {
-				QImage scaled = original.scaled(
-					targetRes,
-					Qt::KeepAspectRatioByExpanding,
-					Qt::SmoothTransformation);
-				if (!cacheFile.isEmpty()) scaled.save(cacheFile, "PNG");
-				return scaled;
-			}
+			if (targetRes.isEmpty()) return original;
 
-			if (!cacheFile.isEmpty()) original.save(cacheFile, "PNG");
-			return original;
+			QImage scaled = (original.width() > targetRes.width() ||
+							 original.height() > targetRes.height())
+								? original.scaled(
+									  targetRes,
+									  Qt::KeepAspectRatioByExpanding,
+									  Qt::SmoothTransformation)
+								: original;
+
+			if (stale()) return scaled;
+
+			if (!cacheFile.isEmpty()) scaled.save(cacheFile, "PNG");
+			return scaled;
 		});
 
 	m_imageWatcher.setFuture(future);
 }
 
 void WallpaperImage::handleImageLoaded() {
-	m_image = m_imageWatcher.result();
+	QImage result = m_imageWatcher.result();
+	if (result.isNull()) {
+		setStatus(Error);
+		return;
+	}
 
-	setStatus(m_image.isNull() ? Error : Ready);
-
-	m_textureDirty = true;
+	m_pendingImage = result;
+	m_hasPending = true;
+	setStatus(Ready);
 	update();
 }
 
-QSGNode* WallpaperImage::updatePaintNode(
-	QSGNode* oldNode, UpdatePaintNodeData*) {
-	auto* node = static_cast<QSGImageNode*>(oldNode);
+QRectF WallpaperImage::computeSourceRect(QSGTexture* texture) const {
+	QSize texSize = texture->textureSize();
 
-	if (m_image.isNull()) {
-		delete node;
-		return nullptr;
+	qreal cW = m_cropWidth / m_zoom;
+	qreal cH = m_cropHeight / m_zoom;
+
+	QRectF reqRect(
+		m_cropX * texSize.width(),
+		m_cropY * texSize.height(),
+		cW * texSize.width(),
+		cH * texSize.height());
+
+	QRectF bounds = boundingRect();
+	if (bounds.isEmpty() || reqRect.isEmpty()) return reqRect;
+
+	qreal targetRatio = bounds.width() / bounds.height();
+	qreal reqRatio = reqRect.width() / reqRect.height();
+
+	QRectF sourceRect = reqRect;
+
+	if (reqRatio > targetRatio) {
+		qreal newWidth = reqRect.height() * targetRatio;
+		qreal xOffset = (reqRect.width() - newWidth) / 2.0;
+		sourceRect.setX(reqRect.x() + xOffset);
+		sourceRect.setWidth(newWidth);
+	} else if (reqRatio < targetRatio) {
+		qreal newHeight = reqRect.width() / targetRatio;
+		qreal yOffset = (reqRect.height() - newHeight) / 2.0;
+		sourceRect.setY(reqRect.y() + yOffset);
+		sourceRect.setHeight(newHeight);
 	}
 
-	if (!node) {
-		node = window()->createImageNode();
-	}
+	return sourceRect;
+}
 
-	if (m_textureDirty) {
-		if (m_texture) delete m_texture;
-		m_texture = window()->createTextureFromImage(
-			m_image, QQuickWindow::TextureHasAlphaChannel);
-		m_textureDirty = false;
-	}
+void WallpaperImage::configureImageNode(
+	QSGImageNode* node, QSGTexture* texture) {
+	node->setTexture(texture);
+	node->setRect(boundingRect());
+	node->setFiltering(QSGTexture::Linear);
 
-	if (m_texture) {
-		node->setTexture(m_texture);
-		node->setRect(boundingRect());
-		node->setFiltering(QSGTexture::Linear);
-
-		qreal cW = m_cropWidth / m_zoom;
-		qreal cH = m_cropHeight / m_zoom;
-
-		QRectF reqRect(
-			m_cropX * m_texture->textureSize().width(),
-			m_cropY * m_texture->textureSize().height(),
-			cW * m_texture->textureSize().width(),
-			cH * m_texture->textureSize().height());
-
-		QRectF bounds = boundingRect();
-		if (bounds.isEmpty() || reqRect.isEmpty()) return node;
-
-		qreal targetRatio = bounds.width() / bounds.height();
-		qreal reqRatio = reqRect.width() / reqRect.height();
-
-		QRectF sourceRect = reqRect;
-
-		if (reqRatio > targetRatio) {
-			qreal newWidth = reqRect.height() * targetRatio;
-			qreal xOffset = (reqRect.width() - newWidth) / 2.0;
-			sourceRect.setX(reqRect.x() + xOffset);
-			sourceRect.setWidth(newWidth);
-		} else if (reqRatio < targetRatio) {
-			qreal newHeight = reqRect.width() / targetRatio;
-			qreal yOffset = (reqRect.height() - newHeight) / 2.0;
-			sourceRect.setY(reqRect.y() + yOffset);
-			sourceRect.setHeight(newHeight);
-		}
+	QRectF sourceRect = computeSourceRect(texture);
+	node->setSourceRect(sourceRect);
 
+	if (texture == m_texture) {
+		QSize texSize = texture->textureSize();
 		QRectF normalizedActual(
-			sourceRect.x() / m_texture->textureSize().width(),
-			sourceRect.y() / m_texture->textureSize().height(),
-			sourceRect.width() / m_texture->textureSize().width(),
-			sourceRect.height() / m_texture->textureSize().height());
+			sourceRect.x() / texSize.width(),
+			sourceRect.y() / texSize.height(),
+			sourceRect.width() / texSize.width(),
+			sourceRect.height() / texSize.height());
 
 		bool changed = false;
-
 		auto updateIfChanged = [&](qreal& dst, qreal value) {
 			if (!qFuzzyCompare(dst, value)) {
 				dst = value;
 				changed = true;
 			}
 		};
-
 		updateIfChanged(m_actualCropX, normalizedActual.x());
 		updateIfChanged(m_actualCropY, normalizedActual.y());
 		updateIfChanged(m_actualCropWidth, normalizedActual.width());
 		updateIfChanged(m_actualCropHeight, normalizedActual.height());
-
 		if (changed) emit actualCropChanged();
+	}
+}
 
-		node->setSourceRect(sourceRect);
+QSGNode* WallpaperImage::updatePaintNode(
+	QSGNode* oldNode, UpdatePaintNodeData*) {
+	Q_UNUSED(oldNode);
+
+	if (m_hasPending) {
+		if (m_previousTexture) {
+			delete m_previousTexture;
+			m_previousTexture = nullptr;
+		}
+		m_previousTexture = m_texture;
+		m_texture = window()->createTextureFromImage(
+			m_pendingImage, QQuickWindow::TextureHasAlphaChannel);
+		m_pendingImage = QImage();
+		m_hasPending = false;
+
+		if (m_previousTexture && m_fadeDuration > 0) {
+			m_fading = true;
+			m_fadeTimer.restart();
+		} else {
+			if (m_previousTexture) {
+				delete m_previousTexture;
+				m_previousTexture = nullptr;
+			}
+			m_fading = false;
+		}
 	}
 
-	return node;
+	if (!m_texture) {
+		return m_rootNode;
+	}
+
+	if (!m_rootNode) {
+		m_rootNode = new QSGNode();
+
+		m_newOpacityNode = new QSGOpacityNode();
+		m_newImageNode = window()->createImageNode();
+		m_newOpacityNode->appendChildNode(m_newImageNode);
+		m_rootNode->appendChildNode(m_newOpacityNode);
+
+		m_oldOpacityNode = new QSGOpacityNode();
+		m_oldImageNode = window()->createImageNode();
+		m_oldOpacityNode->appendChildNode(m_oldImageNode);
+		m_rootNode->appendChildNode(m_oldOpacityNode);
+	}
+
+	configureImageNode(m_newImageNode, m_texture);
+	m_newOpacityNode->setOpacity(1.0);
+
+	if (m_fading && m_previousTexture) {
+		qreal progress =
+			qBound(0.0, qreal(m_fadeTimer.elapsed()) / m_fadeDuration, 1.0);
+
+		configureImageNode(m_oldImageNode, m_previousTexture);
+		m_oldOpacityNode->setOpacity(1.0 - progress);
+
+		if (progress >= 1.0) {
+			m_fading = false;
+			delete m_previousTexture;
+			m_previousTexture = nullptr;
+			m_oldOpacityNode->setOpacity(0.0);
+		} else {
+			update();
+		}
+	} else {
+		m_oldOpacityNode->setOpacity(0.0);
+	}
+
+	return m_rootNode;
 }
 
 } // namespace ZShell::internal

Plugins/ZShell/Internal/wallpaperimage.hpp

@@ -4,9 +4,15 @@
 #include <QImage>
 #include <QUrl>
 #include <QSGTexture>
+#include <QSGOpacityNode>
+#include <QSGImageNode>
 #include <QFutureWatcher>
+#include <QElapsedTimer>
+#include <QThreadPool>
+#include <QTimer>
 #include <QtQml/qqml.h>
 #include <qtmetamacros.h>
+#include <atomic>
 
 namespace ZShell::internal {
 
@@ -19,6 +25,9 @@ class WallpaperImage : public QQuickItem {
 			NOTIFY screenResolutionChanged)
 	Q_PROPERTY(qreal zoom READ zoom WRITE setZoom NOTIFY zoomChanged)
 	Q_PROPERTY(Status status READ status NOTIFY statusChanged)
+	Q_PROPERTY(
+		int fadeDuration READ fadeDuration WRITE setFadeDuration NOTIFY
+			fadeDurationChanged)
 
 	Q_PROPERTY(qreal actualCropX READ actualCropX NOTIFY actualCropChanged)
 	Q_PROPERTY(qreal actualCropY READ actualCropY NOTIFY actualCropChanged)
@@ -54,12 +63,12 @@ class WallpaperImage : public QQuickItem {
 	qreal zoom() const { return m_zoom; }
 	void setZoom(qreal zoom);
 
+	int fadeDuration() const { return m_fadeDuration; }
+	void setFadeDuration(int ms);
+
 	qreal actualCropX() const { return m_actualCropX; }
-
 	qreal actualCropY() const { return m_actualCropY; }
-
 	qreal actualCropWidth() const { return m_actualCropWidth; }
-
 	qreal actualCropHeight() const { return m_actualCropHeight; }
 
 	qreal cropX() const { return m_cropX; }
@@ -82,6 +91,7 @@ class WallpaperImage : public QQuickItem {
 	void sourceChanged();
 	void screenResolutionChanged();
 	void zoomChanged();
+	void fadeDurationChanged();
 	void actualCropChanged();
 	void cropXChanged();
 	void cropYChanged();
@@ -90,15 +100,18 @@ class WallpaperImage : public QQuickItem {
 	void statusChanged();
 
 	private:
-	void loadImage();
+	void beginLoad();
 	void handleImageLoaded();
 	QString getCacheFilePath() const;
 	void setStatus(const Status s);
+	QRectF computeSourceRect(QSGTexture* texture) const;
+	void configureImageNode(QSGImageNode* node, QSGTexture* texture);
 
 	Status m_status = Null;
 	QUrl m_source;
 	QSize m_screenResolution;
 	qreal m_zoom = 1.0;
+	int m_fadeDuration = 400;
 
 	qreal m_actualCropX = 0.0;
 	qreal m_actualCropY = 0.0;
@@ -110,10 +123,25 @@ class WallpaperImage : public QQuickItem {
 	qreal m_cropWidth = 1.0;
 	qreal m_cropHeight = 1.0;
 
-	QImage m_image;
-	QSGTexture* m_texture = nullptr;
-	bool m_textureDirty = false;
+	QTimer m_loadDebounceTimer;
 	QFutureWatcher<QImage> m_imageWatcher;
+	std::shared_ptr<std::atomic<quint64>> m_requestGeneration =
+		std::make_shared<std::atomic<quint64>>(0);
+	static QThreadPool* loadPool();
+	QImage m_pendingImage;
+	bool m_hasPending = false;
+
+	QSGTexture* m_texture = nullptr;
+	QSGTexture* m_previousTexture = nullptr;
+
+	bool m_fading = false;
+	QElapsedTimer m_fadeTimer;
+
+	QSGNode* m_rootNode = nullptr;
+	QSGOpacityNode* m_newOpacityNode = nullptr;
+	QSGOpacityNode* m_oldOpacityNode = nullptr;
+	QSGImageNode* m_newImageNode = nullptr;
+	QSGImageNode* m_oldImageNode = nullptr;
 };
 
 } // namespace ZShell::internal

cli/src/zshell/__init__.py

@@ -8,7 +8,14 @@ import typer
 from typer._completion_classes import completion_init
 from typer._completion_shared import _get_shell_name, install
 
-from zshell.subcommands import record, scheme, screenshot, shell, wallpaper
+from zshell.subcommands import (
+	battery,
+	record,
+	scheme,
+	screenshot,
+	shell,
+	wallpaper,
+)
 
 app = typer.Typer(name="zshell-cli", add_completion=False)
 
@@ -17,6 +24,7 @@ app.add_typer(scheme.app, name="scheme")
 app.add_typer(screenshot.app, name="screenshot")
 app.add_typer(wallpaper.app, name="wallpaper")
 app.add_typer(record.app, name="record")
+app.add_typer(battery.app, name="battery")
 
 
 def _completion_installed() -> bool:

cli/src/zshell/subcommands/battery.py

@@ -0,0 +1,819 @@
+from __future__ import annotations
+
+import contextlib
+import fcntl
+import json
+import logging
+import os
+import re
+import signal
+import struct
+import tempfile
+import threading
+import time
+from collections.abc import Callable
+from dataclasses import asdict, dataclass
+from pathlib import Path
+
+import typer
+from logitech_receiver import hidpp10, hidpp20
+from logitech_receiver.common import Battery, BatteryStatus, Notification
+from logitech_receiver.hidpp10_constants import Registers
+from logitech_receiver.hidpp20_constants import SupportedFeature
+
+app = typer.Typer(
+	help="Read live battery status from Logitech HID++ peripherals."
+)
+
+logger = logging.getLogger("zshell.battery")
+
+DEFAULT_OUTPUT = Path.home() / ".cache" / "zshell" / "battery.json"
+
+_RUNTIME_DIR = Path(
+	os.environ.get("XDG_RUNTIME_DIR") or (Path.home() / ".cache" / "zshell")
+)
+DEFAULT_LOCK = _RUNTIME_DIR / "zshell-battery-daemon.lock"
+
+
+def _acquire_singleton_lock(path: Path) -> int | None:
+	path.parent.mkdir(parents=True, exist_ok=True)
+	fd = os.open(path, os.O_CREAT | os.O_RDWR, 0o644)
+	try:
+		fcntl.flock(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
+	except BlockingIOError:
+		os.close(fd)
+		return None
+	os.ftruncate(fd, 0)
+	os.write(fd, str(os.getpid()).encode())
+	return fd
+
+
+@dataclass
+class DeviceBattery:
+	model: str
+	nativePath: str | None
+	serial: str | None
+	type: str | None
+	wired: bool
+	percentage: float | None
+	state: str | None
+	charging: bool
+	isPresent: bool
+
+
+_SYSFS_POWER_SUPPLY = Path("/sys/class/power_supply")
+
+
+def _normalize_serial(s: str) -> str:
+	return re.sub(r"[^0-9A-Za-z]", "", s).upper()
+
+
+def _find_upower_native_path(serial: str | None) -> str | None:
+	if not serial or not _SYSFS_POWER_SUPPLY.is_dir():
+		return None
+	target = _normalize_serial(serial)
+	for entry in _SYSFS_POWER_SUPPLY.glob("hidpp_battery_*"):
+		try:
+			raw = (entry / "serial_number").read_text().strip()
+		except OSError:
+			logger.debug(
+				"couldn't read serial_number under %s", entry, exc_info=True
+			)
+			continue
+		if _normalize_serial(raw) == target:
+			return entry.name
+	return None
+
+
+def _process_battery_notification(dev, n) -> bool:
+
+	if not getattr(dev, "isDevice", False):
+		return False
+
+	if int(n.sub_id) & 0x80:
+		return False
+	if n.sub_id == Notification.NO_OPERATION:
+		return False
+
+	if getattr(dev, "protocol", None) is not None and dev.protocol < 2.0:
+		if n.sub_id in (Registers.BATTERY_STATUS, Registers.BATTERY_CHARGE):
+			if n.data[-1:] != b"\x00":
+				return False
+			data = bytes([n.address]) + n.data
+			dev.set_battery_info(hidpp10.parse_battery_status(n.sub_id, data))
+			return True
+		return False
+
+	features = getattr(dev, "features", None)
+	if not features:
+		return False
+
+	try:
+		feature = features.get_feature(n.sub_id)
+	except Exception:
+		return False
+
+	if feature == SupportedFeature.BATTERY_STATUS:
+		if n.address == 0x00:
+			dev.set_battery_info(hidpp20.decipher_battery_status(n.data)[1])
+			return True
+		return False
+
+	if feature == SupportedFeature.BATTERY_VOLTAGE:
+		if n.address == 0x00:
+			dev.set_battery_info(hidpp20.decipher_battery_voltage(n.data)[1])
+			return True
+		return False
+
+	if feature == SupportedFeature.UNIFIED_BATTERY:
+		if n.address == 0x00:
+			dev.set_battery_info(hidpp20.decipher_battery_unified(n.data)[1])
+			return True
+		return False
+
+	if feature == SupportedFeature.ADC_MEASUREMENT:
+		if n.address == 0x00:
+			result = hidpp20.decipher_adc_measurement(n.data)
+			if result:
+				dev.set_battery_info(result[1])
+				return True
+		return False
+
+	if feature == SupportedFeature.CENTURION_BATTERY_SOC:
+		dev.set_battery_info(hidpp20.decipher_battery_centurion(n.data)[1])
+		return True
+
+	if feature == SupportedFeature.SOLAR_DASHBOARD:
+		if n.data[5:9] == b"GOOD":
+			charge, lux, _ = struct.unpack("!BHH", n.data[:5])
+			status = BatteryStatus.DISCHARGING
+			if n.address == 0x10 and lux > 200:
+				status = BatteryStatus.RECHARGING
+			dev.set_battery_info(Battery(charge, None, status, None, lux))
+			return True
+		return False
+
+	return False
+
+
+def _import_listener_deps():
+	try:
+		from logitech_receiver import base, device, receiver
+		from logitech_receiver.listener import EventsListener
+	except ImportError as e:
+		raise RuntimeError(
+			"logitech_receiver isn't importable -- install it with `pip install solaar`."
+		) from e
+	except ValueError as e:
+		raise RuntimeError(
+			"logitech_receiver failed to import because a GTK3 typelib is missing "
+			f"({e}). Install the same GTK3 + PyGObject packages Solaar's GUI needs "
+			"(e.g. python3-gi + gir1.2-gtk-3.0 on Debian/Ubuntu, or the gtk3/"
+			"python3-gobject equivalents on your distro)."
+		) from e
+
+	class _BatteryEventsListener(EventsListener):
+		def __init__(self, receiver_or_device, on_change):
+			super().__init__(receiver_or_device, self._handle_notification)
+			self._on_change = on_change
+
+		def has_started(self):
+
+			if not self.receiver.isDevice:
+				try:
+					self.receiver.notification_flags = (
+						self.receiver.enable_connection_notifications()
+					)
+					self.receiver.notify_devices()
+				except Exception:
+					logger.exception(
+						"failed enabling notifications for %s", self.receiver
+					)
+
+		def _handle_notification(self, n):
+			if self.receiver.isDevice:
+				try:
+					_process_battery_notification(self.receiver, n)
+				except Exception:
+					logger.exception("processing %s for %s", n, self.receiver)
+				self._on_change(self.receiver)
+				return
+
+			if n.devnumber == 0xFF:
+				try:
+					_process_battery_notification(self.receiver, n)
+				except Exception:
+					logger.exception("processing receiver notification %s", n)
+				self._on_change(self.receiver)
+				return
+
+			if not (0 < n.devnumber <= 16):
+				logger.warning(
+					"unexpected device number %s in %s", n.devnumber, n
+				)
+				return
+
+			try:
+				dev = self.receiver[n.devnumber]
+			except Exception:
+				logger.exception(
+					"resolving device number %s on %s",
+					n.devnumber,
+					self.receiver,
+				)
+				return
+
+			if not dev:
+				logger.warning(
+					"%s: received %s for invalid device %d",
+					self.receiver,
+					n,
+					n.devnumber,
+				)
+				return
+
+			try:
+				_process_battery_notification(dev, n)
+			except Exception:
+				logger.exception("processing %s for %s", n, dev)
+
+			self._on_change(dev)
+
+	return base, device, receiver, _BatteryEventsListener
+
+
+def _start_hotplug_watcher(on_hotplug: Callable[[], None]):
+	try:
+		import pyudev
+	except ImportError:
+		logger.warning(
+			"pyudev isn't importable -- hotplugged devices will only be "
+			"noticed on the next --rescan-interval tick, not instantly. "
+			"Install it with `pip install pyudev` (it's a core Solaar "
+			"dependency, so it's normally already present)."
+		)
+		return None
+
+	debounce_lock = threading.Lock()
+	debounce_state: dict[str, threading.Timer | None] = {"timer": None}
+	DEBOUNCE_SECONDS = 0.5
+
+	def _fire():
+		with debounce_lock:
+			debounce_state["timer"] = None
+		on_hotplug()
+
+	def _handle_event(_device):
+		if _device.action not in ("add", "remove"):
+			return
+		with debounce_lock:
+			existing = debounce_state["timer"]
+			if existing is not None:
+				existing.cancel()
+			timer = threading.Timer(DEBOUNCE_SECONDS, _fire)
+			timer.daemon = True
+			debounce_state["timer"] = timer
+			timer.start()
+
+	context = pyudev.Context()
+	monitor = pyudev.Monitor.from_netlink(context)
+	monitor.filter_by(subsystem="hidraw")
+	observer = pyudev.MonitorObserver(monitor, callback=_handle_event)
+	observer.start()
+	return observer
+
+
+class _ListenerRegistry:
+	def __init__(self, on_change):
+		self._on_change = on_change
+		self._entries = {}
+		self._last_change: dict[int, float] = {}
+		self._lock = threading.Lock()
+		self._rescan_lock = threading.Lock()
+		self._min_rescan_interval = 1.0
+		self._last_rescan_time = 0.0
+
+		self._hidpp_io_lock = threading.RLock()
+
+	def _touch_and_notify(self, dev_or_receiver, *args, **kwargs):
+		with self._lock:
+			self._last_change[id(dev_or_receiver)] = time.time()
+		self._on_change(dev_or_receiver, *args, **kwargs)
+
+	def last_change(self, dev) -> float:
+		with self._lock:
+			return self._last_change.get(id(dev), 0.0)
+
+	def rescan(self):
+		now = time.monotonic()
+		if now - self._last_rescan_time < self._min_rescan_interval:
+			return
+		if not self._rescan_lock.acquire(blocking=False):
+			return
+
+		try:
+			self._last_rescan_time = now
+			with self._hidpp_io_lock:
+				base, device, receiver, ListenerClass = _import_listener_deps()
+
+				with self._lock:
+					dead = [
+						p
+						for p, (_obj, listener) in self._entries.items()
+						if not listener._active
+					]
+					for p in dead:
+						dying_obj, _dying_listener = self._entries[p]
+
+						if dying_obj.isDevice:
+							ident = getattr(
+								dying_obj, "unitId", None
+							) or getattr(dying_obj, "serial", None)
+							info = getattr(dying_obj, "battery_info", None)
+							if ident and info is not None:
+								for (
+									other_path,
+									(other_obj, _other_listener),
+								) in self._entries.items():
+									if other_path == p or other_obj.isDevice:
+										continue
+									for child in other_obj:
+										child_ident = getattr(
+											child, "unitId", None
+										) or getattr(child, "serial", None)
+										if child_ident == ident:
+											child.set_battery_info(info)
+											break
+						del self._entries[p]
+					known_paths = set(self._entries.keys())
+
+				with self._lock:
+					id_to_entry = {}
+					for path, (obj, listener) in self._entries.items():
+						if obj.isDevice:
+							ident = obj.unitId or obj.serial
+							if ident:
+								id_to_entry[ident] = (path, obj, listener)
+
+				for dev_info in base.receivers_and_devices():
+					if dev_info.path in known_paths:
+						continue
+					try:
+						if dev_info.isDevice:
+							obj = device.create_device(base, dev_info)
+						else:
+							obj = receiver.create_receiver(base, dev_info)
+					except OSError as e:
+						if e.errno == 13:
+							logger.error(
+								"permission denied opening %s -- check the Solaar udev rule "
+								"(rules.d/42-logitech-unify-permissions.rules) is installed",
+								dev_info.path,
+							)
+						else:
+							logger.exception("failed opening %s", dev_info)
+						continue
+					except Exception:
+						logger.exception("failed opening %s", dev_info)
+						continue
+
+					if obj is None:
+						continue
+
+					listener = ListenerClass(obj, self._touch_and_notify)
+					to_join = None
+
+					if obj.isDevice:
+						ident = None
+						try:
+							if obj.protocol >= 2.0:
+								obj.get_ids()
+							ident = obj.unitId or obj.serial
+						except Exception:
+							pass
+
+						if ident:
+							with self._lock:
+								existing = id_to_entry.get(ident)
+								if existing:
+									old_path, old_obj, old_listener = existing
+
+									if old_path != dev_info.path:
+										logger.info(
+											"replacing device %s (old path %s) with new path %s",
+											ident,
+											old_path,
+											dev_info.path,
+										)
+
+										if (
+											getattr(obj, "battery_info", None)
+											is None
+											and getattr(
+												old_obj, "battery_info", None
+											)
+											is not None
+										):
+											obj.set_battery_info(
+												old_obj.battery_info
+											)
+
+										old_listener.stop()
+
+										del self._entries[old_path]
+
+										self._entries[dev_info.path] = (
+											obj,
+											listener,
+										)
+										self._last_change[id(obj)] = time.time()
+
+										to_join = old_listener
+										break
+									else:
+										pass
+								else:
+									if (
+										getattr(obj, "battery_info", None)
+										is None
+									):
+										for (
+											_,
+											(other_obj, _other_listener),
+										) in self._entries.items():
+											if other_obj.isDevice:
+												continue
+											for child in other_obj:
+												child_ident = getattr(
+													child, "unitId", None
+												) or getattr(
+													child, "serial", None
+												)
+												if child_ident == ident:
+													obj.set_battery_info(
+														child.battery_info
+													)
+													break
+											if (
+												getattr(
+													obj,
+													"battery_info",
+													None,
+												)
+												is not None
+											):
+												break
+
+					with self._lock:
+						if dev_info.path not in self._entries:
+							self._entries[dev_info.path] = (obj, listener)
+							self._last_change[id(obj)] = time.time()
+
+					listener.start()
+
+					logger.info(
+						"listening on %s (%s)",
+						dev_info.path,
+						"device" if dev_info.isDevice else "receiver",
+					)
+
+					if to_join is not None:
+						try:
+							to_join.join(timeout=1.0)
+						except Exception:
+							logger.exception("error joining replaced listener")
+						del to_join
+
+		finally:
+			self._rescan_lock.release()
+
+	def known_devices(self):
+		with self._lock:
+			entries = list(self._entries.values())
+
+		result = []
+		seen_idents = set()
+		for obj, _listener in entries:
+			if obj.isDevice:
+				ident = obj.unitId or obj.serial
+				if ident and ident in seen_idents:
+					continue
+				if ident:
+					seen_idents.add(ident)
+				result.append(obj)
+			else:
+				for child in obj:
+					ident = child.unitId or child.serial
+					if ident and ident in seen_idents:
+						continue
+					if ident:
+						seen_idents.add(ident)
+					result.append(child)
+		return result
+
+	def stop(self):
+		with self._lock:
+			entries = list(self._entries.values())
+		for _obj, listener in entries:
+			try:
+				listener.stop()
+			except Exception:
+				logger.exception("error stopping listener")
+		for _obj, listener in entries:
+			listener.join(timeout=2.0)
+
+
+def _snapshot(registry: _ListenerRegistry) -> list[DeviceBattery]:
+	results: list[DeviceBattery] = []
+
+	with registry._hidpp_io_lock:
+		for dev in registry.known_devices():
+			info = dev.battery_info
+			if info is None:
+				try:
+					if dev.ping():
+						info = dev.battery()
+				except Exception:
+					logger.debug(
+						"initial battery() failed for %s", dev, exc_info=True
+					)
+					info = None
+			entry = _to_device_battery(dev, info)
+			if entry is not None:
+				results.append(entry)
+	return results
+
+
+def _clean_json(path: Path) -> None:
+	_write_json_atomic(path, [])
+
+
+def _iter_open_devices():
+	try:
+		from logitech_receiver import base, device, receiver
+	except ImportError as e:
+		raise RuntimeError(
+			"logitech_receiver isn't importable -- install it with `pip install solaar`."
+		) from e
+	except ValueError as e:
+		raise RuntimeError(
+			"logitech_receiver failed to import because a GTK3 typelib is missing "
+			f"({e}). Install the same GTK3 + PyGObject packages Solaar's GUI needs "
+			"(e.g. python3-gi + gir1.2-gtk-3.0 on Debian/Ubuntu, or the gtk3/"
+			"python3-gobject equivalents on your distro)."
+		) from e
+
+	for dev_info in base.receivers_and_devices():
+		try:
+			if dev_info.isDevice:
+				d = device.create_device(base, dev_info)  # pyright: ignore[reportArgumentType]
+				if d is not None:
+					yield d
+			else:
+				d = receiver.create_receiver(base, dev_info)  # pyright: ignore[reportArgumentType]
+				if d is not None:
+					yield from d
+		except OSError as e:
+			if e.errno == 13:
+				logger.error(
+					"permission denied opening %s -- check the Solaar udev rule "
+					"(rules.d/42-logitech-unify-permissions.rules) is installed "
+					"and you're in the right group",
+					dev_info.path,
+				)
+			else:
+				logger.exception("failed opening %s", dev_info)
+			continue
+		except Exception:
+			logger.exception("failed opening %s", dev_info)
+			continue
+
+
+def _to_device_battery(dev, battery) -> DeviceBattery | None:
+	if battery is None:
+		return None
+
+	percentage = battery.level / 100 if isinstance(battery.level, int) else None
+	state = battery.status.name.lower() if battery.status is not None else None
+
+	serial = (
+		getattr(dev, "serial", None) or getattr(dev, "unitId", None) or None
+	)
+
+	return DeviceBattery(
+		model=dev.name or dev.codename or "Unknown device",
+		nativePath=_find_upower_native_path(serial),
+		serial=serial,
+		type=str(dev.kind) if dev.kind is not None else None,
+		wired=dev.receiver is None,
+		percentage=percentage,
+		state=state,
+		charging=battery.charging(),
+		isPresent=battery.ok(),
+	)
+
+
+def _read_battery(dev) -> DeviceBattery | None:
+	try:
+		if not dev.ping():
+			return None
+	except Exception:
+		logger.debug("ping failed for %s", dev, exc_info=True)
+		return None
+
+	try:
+		battery = dev.battery()
+	except Exception:
+		logger.debug("battery() failed for %s", dev, exc_info=True)
+		return None
+
+	return _to_device_battery(dev, battery)
+
+
+def poll_once() -> list[DeviceBattery]:
+	results: list[DeviceBattery] = []
+	seen_idents = set()
+	for dev in _iter_open_devices():
+		try:
+			info = _read_battery(dev)
+			if info is not None:
+				entry = _to_device_battery(dev, info)
+				if entry:
+					ident = entry.serial or (getattr(dev, "unitId", None))
+					if ident and ident in seen_idents:
+						continue
+					if ident:
+						seen_idents.add(ident)
+					results.append(entry)
+		finally:
+			with contextlib.suppress(Exception):
+				dev.close()
+	return results
+
+
+def _write_json_atomic(path: Path, results: list[DeviceBattery]) -> None:
+	path.parent.mkdir(parents=True, exist_ok=True)
+	payload = {
+		"updated": time.time(),
+		"devices": [asdict(r) for r in results],
+	}
+	fd, tmp_path = tempfile.mkstemp(
+		dir=path.parent, prefix=".battery-", suffix=".tmp"
+	)
+	try:
+		with os.fdopen(fd, "w") as f:
+			json.dump(payload, f, indent=2)
+		os.replace(tmp_path, path)
+	except Exception:
+		Path(tmp_path).unlink(missing_ok=True)
+		raise
+
+
+@app.command()
+def daemon(
+	rescan_interval: float = typer.Option(
+		60.0,
+		"--rescan-interval",
+		"-i",
+		help=(
+			"Seconds between fallback rescans. This is NOT a battery poll "
+			"interval -- battery updates are event-driven and written as "
+			"soon as a device reports a change. New/removed devices "
+			"(e.g. plugging a keyboard in to charge) are normally noticed "
+			"within milliseconds via a udev hotplug watcher; this interval "
+			"is only a safety net in case a udev event is ever missed."
+		),
+	),
+	out: Path = typer.Option(
+		DEFAULT_OUTPUT,
+		"--out",
+		"-o",
+		help="Where to write the JSON status file.",
+	),
+	lock_file: Path = typer.Option(
+		DEFAULT_LOCK,
+		"--lock-file",
+		help="Path used to ensure only one daemon runs at a time.",
+	),
+	verbose: bool = typer.Option(
+		False,
+		"--verbose",
+		"-v",
+		help="Log every listener start and battery-change write to stderr.",
+	),
+):
+	lock_fd = _acquire_singleton_lock(lock_file)
+	if lock_fd is None:
+		try:
+			holder_pid = lock_file.read_text().strip()
+		except OSError:
+			holder_pid = "unknown"
+		typer.echo(
+			f"error: a battery daemon is already running (pid {holder_pid}, lock: {lock_file})",
+			err=True,
+		)
+		raise typer.Exit(code=1)
+
+	if verbose:
+		logging.basicConfig(
+			level=logging.INFO, format="%(asctime)s %(name)s: %(message)s"
+		)
+
+	write_lock = threading.Lock()
+	last_payload = None
+
+	pending_write_timer: list[threading.Timer | None] = [None]
+	pending_write_lock = threading.Lock()
+	WRITE_SETTLE_SECONDS = 0.3
+
+	write_seq_lock = threading.Lock()
+	write_seq = 0
+	last_written_seq = 0
+
+	def write_if_changed():
+		nonlocal last_payload, write_seq, last_written_seq
+		with write_seq_lock:
+			write_seq += 1
+			my_seq = write_seq
+
+		results = _snapshot(registry)
+		with write_lock:
+			with write_seq_lock:
+				if my_seq <= last_written_seq:
+					return
+				last_written_seq = my_seq
+			payload = [asdict(r) for r in results]
+			if payload != last_payload:
+				_write_json_atomic(out, results)
+				last_payload = payload
+				logger.info(
+					"battery status changed, wrote %d device(s)", len(results)
+				)
+
+	def write_if_changed_coalesced():
+		with pending_write_lock:
+			existing = pending_write_timer[0]
+			if existing is not None:
+				existing.cancel()
+			timer = threading.Timer(WRITE_SETTLE_SECONDS, write_if_changed)
+			timer.daemon = True
+			pending_write_timer[0] = timer
+			timer.start()
+
+	def on_change(_device_or_receiver, alert=None, reason=None):
+		write_if_changed_coalesced()
+
+	registry = _ListenerRegistry(on_change)
+
+	def rescan_and_write():
+		try:
+			registry.rescan()
+		except Exception:
+			logger.exception("rescan failed")
+		write_if_changed_coalesced()
+
+	try:
+		registry.rescan()
+	except RuntimeError as e:
+		typer.echo(f"error: {e}", err=True)
+		raise typer.Exit(code=1) from None
+
+	write_if_changed()
+
+	hotplug_observer = _start_hotplug_watcher(rescan_and_write)
+
+	running = True
+
+	def _stop(signum, frame):
+		nonlocal running
+		running = False
+
+	signal.signal(signal.SIGINT, _stop)
+	signal.signal(signal.SIGTERM, _stop)
+
+	typer.echo(
+		f"Listening for battery events, writing to {out} (lock: {lock_file})"
+	)
+
+	try:
+		while running:
+			remaining = rescan_interval
+			while running and remaining > 0:
+				step = min(0.2, remaining)
+				time.sleep(step)
+				remaining -= step
+			if running:
+				rescan_and_write()
+	finally:
+		if hotplug_observer is not None:
+			with contextlib.suppress(Exception):
+				hotplug_observer.stop()
+		with contextlib.suppress(Exception):
+			_clean_json(out)
+
+	registry.stop()
+	typer.echo("Stopped.")
+
+
+if __name__ == "__main__":
+	app()

pyproject.toml

@@ -10,12 +10,11 @@ dependencies = [
 	"typer",
 	"pillow",
 	"jinja2",
-	"materialyoucolor"
+	"materialyoucolor",
+	"solaar",
+	"pytest"
 ]
 
-[project.optional-dependencies]
-dev = ["pytest"]
-
 [project.scripts]
 zshell-cli = "zshell:main"