TB 40087 [android]: Implement a switch for spoof English.

Originally, fenix#40087 and android-components#40019.

mobile/android/android-components/components/browser/engine-gecko/src/main/java/mozilla/components/browser/engine/gecko/GeckoEngine.kt

@@ -1331,6 +1331,15 @@ class GeckoEngine(
         override var globalPrivacyControlEnabled: Boolean
             get() = runtime.settings.globalPrivacyControl
             set(value) { runtime.settings.setGlobalPrivacyControl(value) }
+
+        override var spoofEnglish: Boolean
+            get() = runtime.settings.spoofEnglish
+            set(value) {
+                value.let {
+                    runtime.settings.spoofEnglish = it
+                    localeUpdater.updateValue()
+                }
+            }
     }.apply {
         defaultSettings?.let {
             this.javascriptEnabled = it.javascriptEnabled
@@ -1357,6 +1366,7 @@ class GeckoEngine(
             this.cookieBannerHandlingGlobalRulesSubFrames = it.cookieBannerHandlingGlobalRulesSubFrames
             this.globalPrivacyControlEnabled = it.globalPrivacyControlEnabled
             this.emailTrackerBlockingPrivateBrowsing = it.emailTrackerBlockingPrivateBrowsing
+            this.spoofEnglish = it.spoofEnglish
         }
     }
 

mobile/android/android-components/components/concept/engine/src/main/java/mozilla/components/concept/engine/Settings.kt

@@ -251,6 +251,8 @@ abstract class Settings {
      * Setting to control the email tracker blocking feature in the private browsing mode.
      */
     open var emailTrackerBlockingPrivateBrowsing: Boolean by UnsupportedSetting()
+
+    open var spoofEnglish: Boolean by UnsupportedSetting()
 }
 
 /**
@@ -301,6 +303,7 @@ data class DefaultSettings(
     override var queryParameterStrippingAllowList: String = "",
     override var queryParameterStrippingStripList: String = "",
     override var emailTrackerBlockingPrivateBrowsing: Boolean = false,
+    override var spoofEnglish: Boolean = false,
 ) : Settings()
 
 class UnsupportedSetting<T> {

mobile/android/fenix/app/src/main/java/org/mozilla/fenix/components/Core.kt

@@ -157,6 +157,7 @@ class Core(
             cookieBannerHandlingGlobalRules = context.settings().shouldEnableCookieBannerGlobalRules,
             cookieBannerHandlingGlobalRulesSubFrames = context.settings().shouldEnableCookieBannerGlobalRulesSubFrame,
             emailTrackerBlockingPrivateBrowsing = false,
+            spoofEnglish = context.settings().spoofEnglish,
         )
 
         GeckoEngine(

mobile/android/fenix/app/src/main/java/org/mozilla/fenix/settings/advanced/DefaultLocaleSettingsController.kt

@@ -12,6 +12,7 @@ import mozilla.components.browser.state.store.BrowserStore
 import mozilla.components.support.locale.LocaleManager
 import mozilla.components.support.locale.LocaleUseCases
 import org.mozilla.fenix.nimbus.FxNimbus
+import org.mozilla.fenix.ext.components
 import java.util.Locale
 
 interface LocaleSettingsController {
@@ -83,5 +84,9 @@ class DefaultLocaleSettingsController(
         config.setLocale(locale)
         config.setLayoutDirection(locale)
         resources.updateConfiguration(config, resources.displayMetrics)
+        // A slightly hacky way of triggering a `runtime.settings.locales` update,
+        // so that the locales are updated in GeckoView.
+        val spoofEnglish = context.components.core.engine.settings.spoofEnglish
+        context.components.core.engine.settings.spoofEnglish = spoofEnglish
     }
 }

mobile/android/fenix/app/src/main/java/org/mozilla/fenix/settings/advanced/LocaleSettingsFragment.kt

@@ -23,6 +23,8 @@ import org.mozilla.fenix.R
 import org.mozilla.fenix.components.StoreProvider
 import org.mozilla.fenix.databinding.FragmentLocaleSettingsBinding
 import org.mozilla.fenix.ext.components
+import org.mozilla.fenix.ext.requireComponents
+import org.mozilla.fenix.ext.settings
 import org.mozilla.fenix.ext.showToolbar
 
 class LocaleSettingsFragment : Fragment(), MenuProvider {
@@ -46,6 +48,8 @@ class LocaleSettingsFragment : Fragment(), MenuProvider {
         _binding = FragmentLocaleSettingsBinding.inflate(inflater, container, false)
         val view = binding.root
 
+        bindEnableSwitch()
+
         val browserStore = requireContext().components.core.store
         val localeUseCase = LocaleUseCases(browserStore)
 
@@ -62,10 +66,19 @@ class LocaleSettingsFragment : Fragment(), MenuProvider {
                 localeUseCase = localeUseCase,
             ),
         )
-        localeView = LocaleSettingsView(binding.root, interactor)
+        localeView = LocaleSettingsView(binding.localeContainer, interactor)
         return view
     }
 
+    private fun bindEnableSwitch() {
+        val switch = binding.enableSwitch
+        switch.isChecked = requireComponents.core.engine.settings.spoofEnglish
+        switch.setOnCheckedChangeListener { _, isChecked ->
+            context?.settings()?.spoofEnglish = isChecked
+            requireComponents.core.engine.settings.spoofEnglish = isChecked
+        }
+    }
+
     override fun onCreateMenu(menu: Menu, inflater: MenuInflater) {
         inflater.inflate(R.menu.languages_list, menu)
         val searchItem = menu.findItem(R.id.search)

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

@@ -306,6 +306,11 @@ class Settings(private val appContext: Context) : PreferencesHolder {
         false,
     )
 
+    var spoofEnglish by booleanPreference(
+        appContext.getPreferenceKey(R.string.pref_key_spoof_english),
+        default = false
+    )
+
     var defaultSearchEngineName by stringPreference(
         appContext.getPreferenceKey(R.string.pref_key_search_engine),
         default = "",

mobile/android/fenix/app/src/main/res/layout/fragment_locale_settings.xml

@@ -7,13 +7,30 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <FrameLayout
+    <com.google.android.material.switchmaterial.SwitchMaterial
+        android:id="@+id/enable_switch"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_vertical|end"
+        android:background="?android:attr/selectableItemBackground"
+        android:checked="true"
+        android:clickable="true"
+        android:focusable="true"
+        android:layout_marginStart="54dp"
+        android:padding="16dp"
+        android:text="@string/tor_spoof_english"
+        android:textColor="?textPrimary"
+        android:textSize="16sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"  />
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:id="@+id/locale_container"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:layout_height="0dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toBottomOf="@id/enable_switch" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

mobile/android/fenix/app/src/main/res/values/preference_keys.xml

@@ -399,4 +399,6 @@
     <string name="pref_key_noscript_installed" translatable="false">pref_key_noscript_installed</string>
     <string name="pref_key_noscript_updated" translatable="false">pref_key_noscript_updated</string>
     <string name="pref_key_https_everywhere_removed" translatable="false">pref_key_https_everywhere_removed</string>
+
+    <string name="pref_key_spoof_english" translatable="false">pref_key_spoof_english</string>
 </resources>