Improve prompts UX

Backport of https://github.com/mozilla-mobile/firefox-android/commit/1dc21a3786506200be124733e654dff8f39b5395

components/feature/prompts/build.gradle

@@ -31,6 +31,7 @@ tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
 dependencies {
     implementation project(':browser-state')
     implementation project(':concept-engine')
+    implementation project(':feature-session')
     implementation project(':lib-state')
     implementation project(':support-ktx')
     implementation project(':support-utils')
@@ -46,6 +47,7 @@ dependencies {
     testImplementation Dependencies.testing_coroutines
     testImplementation Dependencies.testing_robolectric
     testImplementation Dependencies.testing_mockito
+    testImplementation project(':feature-session')
     testImplementation project(':support-test')
     testImplementation project(':support-test-libstate')
 

components/feature/prompts/src/main/java/mozilla/components/feature/prompts/PromptFeature.kt

@@ -71,6 +71,8 @@ import mozilla.components.feature.prompts.login.LoginExceptions
 import mozilla.components.feature.prompts.login.LoginPicker
 import mozilla.components.feature.prompts.share.DefaultShareDelegate
 import mozilla.components.feature.prompts.share.ShareDelegate
+import mozilla.components.feature.session.SessionUseCases
+import mozilla.components.feature.session.SessionUseCases.ExitFullScreenUseCase
 import mozilla.components.lib.state.ext.flowScoped
 import mozilla.components.support.base.feature.ActivityResultHandler
 import mozilla.components.support.base.feature.LifecycleAwareFeature
@@ -111,6 +113,7 @@ internal const val FRAGMENT_TAG = "mozac_feature_prompt_dialog"
  * @property fragmentManager The [FragmentManager] to be used when displaying
  * a dialog (fragment).
  * @property shareDelegate Delegate used to display share sheet.
+ * @property exitFullscreenUsecase Usecase allowing to exit browser tabs' fullscreen mode.
  * @property loginStorageDelegate Delegate used to access login storage. If null,
  * 'save login'prompts will not be shown.
  * @property isSaveLoginEnabled A callback invoked when a login prompt is triggered. If false,
@@ -144,6 +147,7 @@ class PromptFeature private constructor(
     private var customTabId: String?,
     private val fragmentManager: FragmentManager,
     private val shareDelegate: ShareDelegate,
+    private val exitFullscreenUsecase: ExitFullScreenUseCase = SessionUseCases(store).exitFullscreen,
     override val creditCardValidationDelegate: CreditCardValidationDelegate? = null,
     override val loginValidationDelegate: LoginValidationDelegate? = null,
     private val isSaveLoginEnabled: () -> Boolean = { false },
@@ -184,6 +188,7 @@ class PromptFeature private constructor(
         customTabId: String? = null,
         fragmentManager: FragmentManager,
         shareDelegate: ShareDelegate = DefaultShareDelegate(),
+        exitFullscreenUsecase: ExitFullScreenUseCase = SessionUseCases(store).exitFullscreen,
         creditCardValidationDelegate: CreditCardValidationDelegate? = null,
         loginValidationDelegate: LoginValidationDelegate? = null,
         isSaveLoginEnabled: () -> Boolean = { false },
@@ -202,6 +207,7 @@ class PromptFeature private constructor(
         customTabId = customTabId,
         fragmentManager = fragmentManager,
         shareDelegate = shareDelegate,
+        exitFullscreenUsecase = exitFullscreenUsecase,
         creditCardValidationDelegate = creditCardValidationDelegate,
         loginValidationDelegate = loginValidationDelegate,
         isSaveLoginEnabled = isSaveLoginEnabled,
@@ -222,6 +228,7 @@ class PromptFeature private constructor(
         customTabId: String? = null,
         fragmentManager: FragmentManager,
         shareDelegate: ShareDelegate = DefaultShareDelegate(),
+        exitFullscreenUsecase: ExitFullScreenUseCase = SessionUseCases(store).exitFullscreen,
         creditCardValidationDelegate: CreditCardValidationDelegate? = null,
         loginValidationDelegate: LoginValidationDelegate? = null,
         isSaveLoginEnabled: () -> Boolean = { false },
@@ -240,6 +247,7 @@ class PromptFeature private constructor(
         customTabId = customTabId,
         fragmentManager = fragmentManager,
         shareDelegate = shareDelegate,
+        exitFullscreenUsecase = exitFullscreenUsecase,
         creditCardValidationDelegate = creditCardValidationDelegate,
         loginValidationDelegate = loginValidationDelegate,
         isSaveLoginEnabled = isSaveLoginEnabled,
@@ -420,6 +428,10 @@ class PromptFeature private constructor(
     internal fun onPromptRequested(session: SessionState) {
         // Some requests are handle with intents
         session.content.promptRequests.lastOrNull()?.let { promptRequest ->
+            store.state.findTabOrCustomTabOrSelectedTab(customTabId)?.let {
+                exitFullscreenUsecase(it.id)
+            }
+
             when (promptRequest) {
                 is File -> filePicker.handleFileRequest(promptRequest)
                 is Share -> handleShareRequest(promptRequest, session)