feat: add force flag to emit in Bloc and Cubit - #4862
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Adds an optional `force` parameter (defaults to `false`) to `emit` so a
state can be emitted even when it is equal to the current state.
- `Emittable.emit`, `BlocBase.emit` and `Bloc.emit` accept `{bool force = false}`
- `Emitter.call` forwards `force`, so `emit(state, force: true)` works
inside event handlers and still triggers `onTransition`/`onChange`
- `ReplayCubitMixin.emit` and `ReplayBlocMixin.emit` forward `force`
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sy5uFShMuySLy6T8kGaXor
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Status
READY
Breaking Changes
NO
Description
This PR adds a
forceparameter to theemit()method across the bloc library, allowing developers to emit duplicate states (states equal to the current state) when needed.Changes
BlocBase: Added optionalforceparameter toemit(). Whenforce: true, the state is emitted even if it equals the current state, triggeringonChangecallbacks and notifying listeners.Bloc: Updated theemit()override to accept and forward theforceparameter. Modified the internalonEmitcallback in event handlers to respect theforceflag.Emitter: Addedforceparameter to thecall()method and the_Emitterimplementation to support forced emissions in event handlers.ReplayBlocMixin&ReplayCubitMixin: Updated to forward theforceparameter through the replay stack operations.onChangecallbacks and emit duplicate statesonTransitioncallbacksUse Case
This feature enables scenarios where developers need to re-emit the current state to trigger listeners or observers, which is useful for state refresh operations or explicit state notifications.