Struct InertPlatform 

pub struct InertPlatform;

Platform for hand-pumped tests.

Trait Implementations

impl Platform for InertPlatform

fn target_platform(&self) -> TargetPlatform

Android, which is what Flutter’s own test binding defaults debugDefaultTargetPlatform to: a bare App has no host to speak of, and a deterministic answer beats the machine’s.

fn request_frame(&self, _view: ViewId)

Asks for a frame of view: Flutter’s PlatformDispatcher.scheduleFrame, for one view.

fn now(&self) -> Instant

The host clock used for frame and timer timestamps.

fn dispatcher(&self) -> Arc<dyn Dispatcher>

The host’s threads, for waking the application or running work off the main thread: see Dispatcher.

fn views(&self) -> Vec<ViewRef>

Every view the app has now: those the platform gave it, such as a phone’s screen or an embedder’s views, and those it asked for. An app may run with none, as one on a desktop does until it asks.

fn view(&self, _id: ViewId) -> Option<ViewRef>

Looks up one of the app’s views.

fn request_view(&self, request: ViewRequest) -> Result<RequestId, ViewError>

Asks for a view. A desktop makes a window for it; a platform that gives the app its views and makes none, a phone or an embedder, answers ViewError::Unsupported. The view arrives later, through EmbedderClient::view_added, carrying the id answered here; a request that fails on the way is reported through EmbedderClient::view_request_failed.

fn request_view_focus_change( &self, view_id: ViewId, state: ViewFocusState, direction: ViewFocusDirection, )

Flutter PlatformDispatcher.requestViewFocusChange: asks the host to move view focus. A host without native focus support ignores the request.

fn locales(&self) -> Vec<Locale>

The full system-reported supported locales of the device (Flutter PlatformDispatcher.locales), in order of preference; empty until the host reports them.

fn set_application_locale(&self, locale: &Locale)

Tells the host which locale the application resolved to (Flutter PlatformDispatcher.setApplicationLocale); the default drops it.

fn platform_brightness(&self) -> Brightness

The platform’s light/dark preference (Flutter PlatformDispatcher.platformBrightness).

fn default_route_name(&self) -> String

The route the application was started with (Flutter PlatformDispatcher.defaultRouteName).

fn initial_lifecycle_state(&self) -> Option<AppLifecycleState>

The lifecycle state immediately after the application started (Flutter PlatformDispatcher.initialLifecycleState).

fn font_source(&self) -> Option<Box<dyn FontSource>>

The platform’s own font lookup: faces by family name and by codepoint, the way Flutter’s engine asks the OS. None for a host without one; text then shapes only against fonts the application registers.

fn default_font_families(&self) -> Vec<String>

Flutter’s txt::GetDefaultFontFamilies(): the families text uses when its style names none, first match first.

fn open_image_codec(&self, bytes: Arc<[u8]>) -> ImageCodecFuture

Open an encoded image, answering with a codec for its frames.

fn import_pixels(&self, pixels: PixelBuffer) -> Option<Image>

An image from pixels the app already holds, with no codec in between: Flutter’s decodeImageFromPixels. None when the host has no renderer to put it on yet.

fn compositor(&self) -> Option<Arc<dyn Compositor>>

The host’s compositor, where it has one: native surfaces shown beside the framework’s picture. None on the web, on X11, on the inert host, and on an embedder that chose not to have one.

fn vsync_waiter(&self) -> Option<Arc<dyn VsyncWaiter>>

Flutter’s VsyncWaiter, for any screen: the refreshes the host draws the framework’s frames at, for a producer that paces by them, as a native surface’s does. None for a host without screen ticks.

fn screens(&self) -> Option<&dyn Screens>

The screens the app’s views are on, and where the pointer is on them (Flutter PlatformDispatcher.displays), or None where the host has none to report. Every host with screens answers, a phone with its one included; a view’s metrics name the screen it is on, and a host that hears the screens change says so through EmbedderClient::screens_changed.

fn clipboard(&self) -> Option<&dyn Clipboard>

The system clipboard, or None where the host has none.

fn system_chrome(&self) -> Option<&dyn SystemChrome>

The system UI drawn around the app, or None where the host has none.

fn haptics(&self) -> Option<&dyn Haptics>

Haptic feedback on the device, or None where the host has none.

fn system_context_menu(&self) -> Option<&dyn SystemContextMenu>

The system’s own menu over a text selection, or None where the host has none.

fn popup_menus(&self) -> Option<&dyn PopupMenus>

Native pop-up menus shown at the pointer, or None where the host has none.

fn text_services(&self) -> Option<&dyn TextServices>

The system services a selection toolbar offers, or None where the host has none.

fn mouse_cursor(&self) -> Option<&dyn MouseCursor>

The system cursor shown for a pointing device, or None where the host has none.

fn restoration(&self) -> Option<&dyn Restoration>

Application state kept across relaunches, or None where the host has none.

fn app_exit(&self) -> Option<&dyn AppExit>

Quitting at the application’s own request, or None where the host cannot quit itself: a phone, a browser tab.

fn file_opening(&self) -> Option<&dyn FileOpening>

The files the system asks the app to open, or None where the system never asks: it starts the app with them on its command line instead, or has no files to open.