✨ feat(lock): add fingerprint support (#2308)

dots/.config/quickshell/ii/modules/lock/Lock.qml

@@ -28,7 +28,10 @@ Scope {
 		Connections {
 			target: GlobalStates
 			function onScreenLockedChanged() {
-				if (GlobalStates.screenLocked) lockContext.reset();
+				if (GlobalStates.screenLocked) {
+					lockContext.reset();
+					lockContext.tryFingerUnlock();
+				}
 			}
 		}
 

dots/.config/quickshell/ii/modules/lock/LockContext.qml

@@ -2,6 +2,7 @@ import qs
 import qs.modules.common
 import QtQuick
 import Quickshell
+import Quickshell.Io
 import Quickshell.Services.Pam
 
 Scope {
@@ -18,6 +19,7 @@ Scope {
     property string currentText: ""
     property bool unlockInProgress: false
     property bool showFailure: false
+    property bool fingerprintsConfigured: false
     property var targetAction: LockContext.ActionEnum.Unlock
 
     function resetTargetAction() {
@@ -60,6 +62,34 @@ Scope {
         pam.start();
     }
 
+    function tryFingerUnlock() {
+        if (root.fingerprintsConfigured) {
+            fingerPam.start();
+        }
+    }
+
+    function stopFingerPam() {
+        fingerPam.abort();
+    }
+
+    Process {
+        id: fingerprintCheckProc
+        running: true
+        command: ["bash", "-c", "fprintd-list $(whoami)"]
+        stdout: StdioCollector {
+            id: fingerprintOutputCollector
+            onStreamFinished: {
+                root.fingerprintsConfigured = fingerprintOutputCollector.text.includes("Fingerprints for user");
+            }
+        }
+        onExited: (exitCode, exitStatus) => {
+            if (exitCode !== 0) {
+                console.warn("fprintd-list command exited with error:", exitCode, exitStatus);
+                root.fingerprintsConfigured = false;
+            }
+        }
+    }
+    
     PamContext {
         id: pam
 
@@ -74,6 +104,7 @@ Scope {
         onCompleted: result => {
             if (result == PamResult.Success) {
                 root.unlocked(root.targetAction);
+                stopFingerPam();
             } else {
                 root.clearText();
                 root.unlockInProgress = false;
@@ -83,4 +114,19 @@ Scope {
         }
     }
 
+    PamContext {
+        id: fingerPam
+
+        configDirectory: "pam"
+        config: "fprintd.conf"
+
+        onCompleted: result => {
+            if (result == PamResult.Success) {
+                root.unlocked(root.targetAction);
+                stopFingerPam();
+            } else if (result == PamResult.Error){ // if timeout or etc..
+                tryFingerUnlock()
+            }
+        }
+    }
 }

dots/.config/quickshell/ii/modules/lock/LockSurface.qml

@@ -100,6 +100,23 @@ MouseArea {
         scale: root.toolbarScale
         opacity: root.toolbarOpacity
 
+        // Fingerprint
+        Loader {
+            Layout.leftMargin: 10
+            Layout.rightMargin: 6
+            Layout.alignment: Qt.AlignVCenter
+            active: root.context.fingerprintsConfigured
+            visible: active
+
+            sourceComponent: MaterialSymbol {
+                id: fingerprintIcon
+                fill: 1
+                text: "fingerprint"
+                iconSize: Appearance.font.pixelSize.hugeass
+                color: Appearance.colors.colOnSurfaceVariant
+            }
+        }
+
         ToolbarTextField {
             id: passwordBox
             placeholderText: GlobalStates.screenUnlockFailed ? Translation.tr("Incorrect password") : Translation.tr("Enter password")

dots/.config/quickshell/ii/modules/lock/pam/fprintd.conf

@@ -0,0 +1 @@
+auth    sufficient    pam_fprintd.so