For #933: Adds caching of sign in state (#1647)

app/src/main/java/org/mozilla/fenix/settings/SettingsFragment.kt

@@ -59,6 +59,7 @@ class SettingsFragment : PreferenceFragmentCompat(), CoroutineScope, AccountObse
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         job = Job()
+        updateSignInVisibility()
     }
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
@@ -161,9 +162,6 @@ class SettingsFragment : PreferenceFragmentCompat(), CoroutineScope, AccountObse
         // Observe account changes to keep the UI up-to-date.
         accountManager.register(this, owner = this)
 
-        // TODO an authenticated state will mark 'preferenceSignIn' as invisible; currently that behaviour is non-ideal:
-        // a "sign in" UI will be displayed at first, and then quickly animate away.
-        // Ideally we don't want it to be displayed at all.
         updateAuthState(accountManager.authenticatedAccount())
         accountManager.accountProfile()?.let { updateAccountProfile(it) }
     }
@@ -293,6 +291,7 @@ class SettingsFragment : PreferenceFragmentCompat(), CoroutineScope, AccountObse
 
     override fun onLoggedOut() {
         updateAuthState()
+        updateSignInVisibility()
     }
 
     override fun onProfileUpdated(profile: Profile) {
@@ -301,6 +300,12 @@ class SettingsFragment : PreferenceFragmentCompat(), CoroutineScope, AccountObse
 
     // --- Account UI helpers ---
     private fun updateAuthState(account: OAuthAccount? = null) {
+        // Cache the user's auth state to improve performance of sign in visibility
+        org.mozilla.fenix.utils.Settings.getInstance(context!!).setHasCachedAccount(account != null)
+    }
+
+    private fun updateSignInVisibility() {
+        val hasCachedAccount = org.mozilla.fenix.utils.Settings.getInstance(context!!).hasCachedAccount
         val preferenceSignIn =
             findPreference<Preference>(context!!.getPreferenceKey(pref_key_sign_in))
         val preferenceFirefoxAccount =
@@ -308,7 +313,7 @@ class SettingsFragment : PreferenceFragmentCompat(), CoroutineScope, AccountObse
         val accountPreferenceCategory =
             findPreference<PreferenceCategory>(context!!.getPreferenceKey(pref_key_account_category))
 
-        if (account != null) {
+        if (hasCachedAccount) {
             preferenceSignIn?.isVisible = false
             preferenceSignIn?.onPreferenceClickListener = null
             preferenceFirefoxAccount?.isVisible = true

app/src/main/java/org/mozilla/fenix/utils/Settings.kt

@@ -100,6 +100,9 @@ class Settings private constructor(context: Context) {
             else -> appContext.getString(R.string.preference_light_theme)
         }
 
+    val hasCachedAccount: Boolean
+        get() = preferences.getBoolean(appContext.getPreferenceKey(R.string.pref_key_cached_account), false)
+
     private val autoBounceQuickActionSheetCount: Int
         get() = (preferences.getInt(appContext.getPreferenceKey(R.string.pref_key_bounce_quick_action), 0))
 
@@ -172,6 +175,12 @@ class Settings private constructor(context: Context) {
         )
     }
 
+    fun setHasCachedAccount(isCached: Boolean) {
+        preferences.edit()
+            .putBoolean(appContext.getPreferenceKey(R.string.pref_key_cached_account), isCached)
+            .apply()
+    }
+
     private val SitePermissionsRules.Action.id: Int
         get() {
             return when (this) {

app/src/main/res/values/preference_keys.xml

@@ -33,6 +33,7 @@
     <string name="pref_key_sync_now" translatable="false">pref_key_sync_now</string>
     <string name="pref_key_sync_history" translatable="false">pref_key_sync_history</string>
     <string name="pref_key_sign_out" translatable="false">pref_key_sign_out</string>
+    <string name="pref_key_cached_account" translatable="false">pref_key_cached_account</string>
 
     <!-- Search Settings -->
     <string name="pref_key_show_search_suggestions" translatable="false">pref_key_show_search_suggestions</string>