fix: When the Create / Unlock vault screen is moved into background clear the password field

Author: AChep

common/src/commonMain/kotlin/com/artemchep/keyguard/feature/keyguard/setup/SetupStateProducer.kt

@@ -26,6 +26,7 @@ import com.artemchep.keyguard.platform.crashlyticsIsEnabled
 import com.artemchep.keyguard.platform.crashlyticsSetEnabled
 import com.artemchep.keyguard.res.Res
 import com.artemchep.keyguard.res.*
+import kotlinx.coroutines.awaitCancellation
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.flowOf
@@ -63,6 +64,17 @@ fun setupScreenState(
     val passwordSink = mutablePersistedFlow("password") { DEFAULT_PASSWORD }
     val passwordState = mutableComposeState(passwordSink)
 
+    // Clear the password field when the screen
+    // moves into background.
+    launchUi {
+        try {
+            awaitCancellation()
+        } finally {
+            passwordState.value = DEFAULT_PASSWORD
+            passwordSink.value = DEFAULT_PASSWORD
+        }
+    }
+
     val createVaultByMasterPasswordFn = createVaultWithMasterPassword
         .let {
             CreateVaultWithPassword(executor, it)

common/src/commonMain/kotlin/com/artemchep/keyguard/feature/keyguard/unlock/UnlockStateProducer.kt

@@ -41,6 +41,7 @@ import com.artemchep.keyguard.ui.FlatItemAction
 import kotlinx.collections.immutable.persistentListOf
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.awaitCancellation
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.onStart
@@ -128,6 +129,17 @@ fun unlockScreenState(
     val passwordSink = mutablePersistedFlow("password") { DEFAULT_PASSWORD }
     val passwordState = mutableComposeState(passwordSink)
 
+    // Clear the password field when the screen
+    // moves into background.
+    launchUi {
+        try {
+            awaitCancellation()
+        } finally {
+            passwordState.value = DEFAULT_PASSWORD
+            passwordSink.value = DEFAULT_PASSWORD
+        }
+    }
+
     val actions = persistentListOf(
         FlatItemAction(
             icon = Icons.Outlined.Delete,

common/src/commonMain/kotlin/com/artemchep/keyguard/feature/navigation/state/RememberStateFlowScope.kt

@@ -115,7 +115,7 @@ interface RememberStateFlowScope : RememberStateFlowScopeSub, CoroutineScope, Tr
     ): () -> Unit
 
     fun launchUi(
-        block: CoroutineScope.() -> Unit,
+        block: suspend CoroutineScope.() -> Unit,
     ): () -> Unit
 
     fun action(block: suspend () -> Unit)

common/src/commonMain/kotlin/com/artemchep/keyguard/feature/navigation/state/RememberStateFlowScopeImpl.kt

@@ -208,7 +208,7 @@ class RememberStateFlowScopeImpl(
         }
     }
 
-    override fun launchUi(block: CoroutineScope.() -> Unit): () -> Unit {
+    override fun launchUi(block: suspend CoroutineScope.() -> Unit): () -> Unit {
         val job = isStartedFlow
             .mapLatest { active ->
                 if (!active) {