Unlucky Launcher v0.0.1-alpha
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Rust 原生单文件 Minecraft 启动器:CLI 完整可用(install/launch/accounts/java/diagnose/agent),
MCP server 接入外部 Agent 工具,GUI 开发中。
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AskaEth committed 2026-10-31 21:54:10 +08:00
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//! Toast 中心:右下角非阻塞提示(下载完成 / 复制成功 / 后台任务结论)。
//!
//! 与模态对话框队列([`crate::dialogs`])分开:Toast 不阻塞、不排序、可叠加,
//! 只做「先进先出 + 上限裁剪 + TTL 到期」。UI 侧由 Rust 定时器每帧调用 [`ToastCenter::expire`]。
/// Toast 标识。
pub type ToastId = u64;
/// Toast 语义色。
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ToastKind {
/// 一般信息
Info,
/// 成功
Success,
/// 警告
Warn,
/// 错误
Error,
}
/// 一条 Toast;`remaining_ms` 由 [`ToastCenter::expire`] 递减。
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Toast {
/// 队列内唯一 id(由 [`ToastCenter::push_request`] 重新编号)
pub id: ToastId,
/// 语义色
pub kind: ToastKind,
/// 提示文案
pub text: String,
/// 剩余存活毫秒(0 = 用默认 TTL,入队时补)
pub remaining_ms: u64,
}
/// Toast 中心:先进先出,超出上限丢最旧的。
#[derive(Debug)]
pub struct ToastCenter {
items: Vec<Toast>,
next_id: ToastId,
ttl_ms: u64,
}
impl Default for ToastCenter {
fn default() -> Self {
Self::new()
}
}
impl ToastCenter {
/// 默认 4s 后自动消失。
pub fn new() -> Self {
Self {
items: Vec::new(),
next_id: 0,
ttl_ms: 4_000,
}
}
/// 同时最多显示的条数。
pub const MAX_VISIBLE: usize = 4;
/// 入队一条 Toast。
pub fn push(&mut self, kind: ToastKind, text: impl Into<String>) -> ToastId {
self.push_request(Toast {
id: 0,
kind,
text: text.into(),
remaining_ms: 0,
})
}
/// 入队一条已组装好的 Toast(事件通道用);id 重新编号,`remaining_ms == 0` 视为用默认 TTL。
pub fn push_request(&mut self, mut toast: Toast) -> ToastId {
self.next_id += 1;
toast.id = self.next_id;
if toast.remaining_ms == 0 {
toast.remaining_ms = self.ttl_ms;
}
let id = toast.id;
self.items.push(toast);
while self.items.len() > Self::MAX_VISIBLE {
self.items.remove(0);
}
id
}
/// 当前显示列表(UI 模型来源)。
pub fn items(&self) -> &[Toast] {
&self.items
}
/// 手动关闭(点了关闭按钮)。
pub fn dismiss(&mut self, id: ToastId) -> bool {
if let Some(at) = self.items.iter().position(|toast| toast.id == id) {
self.items.remove(at);
true
} else {
false
}
}
/// 时间推进:移除到期 Toast。
pub fn expire(&mut self, elapsed_ms: u64) {
for toast in &mut self.items {
toast.remaining_ms = toast.remaining_ms.saturating_sub(elapsed_ms);
}
self.items.retain(|toast| toast.remaining_ms > 0);
}
/// 当前条数。
pub fn len(&self) -> usize {
self.items.len()
}
/// 是否没有 Toast。
pub fn is_empty(&self) -> bool {
self.items.is_empty()
}
}
#[cfg(test)]
mod tests {
use super::{ToastCenter, ToastKind};
#[test]
fn toasts_expire_and_cap_the_stack() {
let mut center = ToastCenter::new();
center.push(ToastKind::Info, "a");
center.push(ToastKind::Info, "b");
assert_eq!(center.len(), 2);
for i in 0..10 {
center.push(ToastKind::Success, format!("t{i}"));
}
assert_eq!(center.len(), ToastCenter::MAX_VISIBLE);
center.expire(3_000);
assert_eq!(center.len(), ToastCenter::MAX_VISIBLE);
center.expire(1_001);
assert!(center.is_empty());
}
#[test]
fn dismiss_removes_one_toast() {
let mut center = ToastCenter::new();
let first = center.push(ToastKind::Info, "a");
center.push(ToastKind::Warn, "b");
assert!(center.dismiss(first));
assert!(!center.dismiss(first));
assert_eq!(center.len(), 1);
}
}