// SPDX-License-Identifier: MPL-2.0
// SPDX-FileCopyrightText: 2026 FernTech
//! Tier-3 style protocol for `Snackbar`. See `docs/styling-system.md`.
//!
//! Themes the snackbar surface — the high-contrast notification panel
//! that floats up from the bottom of the window. The `Snackbar`
//! widget keeps its `Role::Alert` / `Live::Polite` accessibility node;
//! `SnackbarStyle` only owns the surface chrome.
use std::rc::Rc;
use crate::build_context::BuildContext;
use crate::widget_id::WidgetId;
#[derive(Clone, Debug)]
pub struct SnackbarStyleConfig {
/// Pre-built message + optional action subtree the surface wraps.
pub content: WidgetId,
}
pub trait SnackbarStyle: 'static {
/// The body wraps `cfg.content` and is chrome: its accessibility node has
/// to let the content through. `Role::GenericContainer`, which the
/// platform adapters drop while keeping its children, and `Live::Off`:
/// the snackbar's own node is a live region announced by its name, and
/// every descendant that sets no politeness inherits it, so each named
/// node in the content would be announced beside that name. Never
/// `set_hidden()`, which an adapter reads as hiding the whole subtree.
fn make_body(&self, cfg: &SnackbarStyleConfig, ctx: &mut BuildContext) -> WidgetId;
}
pub type SharedSnackbarStyle = Rc<dyn SnackbarStyle>;