Struct MemoryExternalDndBackend 

pub struct MemoryExternalDndBackend { /* private fields */ }

In-memory backend for headless tests. Records the (window_id, poster) of each attached window so a test can synthesize OS drag phases via Self::emit, which posts an ExternalDndEventPayload exactly as a real backend would. Cloneable — clones share the same recording, so a test can keep a clone after handing one to ExternalDndHandle::new.

Implementations

impl MemoryExternalDndBackend

pub fn new() -> Self

Build a new empty test backend.

pub fn emit(&self, window_id: TeksiloWindowId, event: ExternalDragEvent) -> bool

Synthesize an OS drag phase for window_id, posting it through that window’s recorded poster. Returns false if the window isn’t attached.

pub fn attached_windows(&self) -> Vec<TeksiloWindowId>

Window ids currently attached. Test helper.

pub fn outbound_drags(&self) -> Vec<OutboundDragData>

Outbound (app → OS) drags requested via begin_drag, in order. Test helper for the escalation path.

Trait Implementations

impl Clone for MemoryExternalDndBackend

fn clone(&self) -> MemoryExternalDndBackend

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for MemoryExternalDndBackend

fn default() -> MemoryExternalDndBackend

Returns the “default value” for a type.

impl ExternalDndBackend for MemoryExternalDndBackend

fn attach( &mut self, _parent: ParentHandle, window_id: TeksiloWindowId, poster: Arc<dyn AppEventPoster>, ) -> Box<dyn ExternalDndGuard>

Register this app as the OS drop target for the window identified by parent (its raw window/display handle). For every phase of a drag over that window the backend MUST post an ExternalDndEventPayload — with window_id_owner set to window_id — through poster.