fix: use a unique Id for each tab (#1826)

yazi-core/src/manager/commands/hover.rs

@@ -2,21 +2,18 @@ use std::{collections::HashSet, path::PathBuf};
 
 use yazi_dds::Pubsub;
 use yazi_macro::render;
-use yazi_shared::{event::{Cmd, Data}, fs::{Url, Urn}};
+use yazi_shared::{Id, event::{Cmd, Data}, fs::{Url, Urn}};
 
 use crate::manager::Manager;
 
 struct Opt {
 	url: Option<Url>,
-	tab: Option<usize>,
+	tab: Option<Id>,
 }
 
 impl From<Cmd> for Opt {
 	fn from(mut c: Cmd) -> Self {
-		Self {
-			url: c.take_first().and_then(Data::into_url),
-			tab: c.get("tab").and_then(Data::as_usize),
-		}
+		Self { url: c.take_first().and_then(Data::into_url), tab: c.get("tab").and_then(Data::as_id) }
 	}
 }
 impl From<Option<Url>> for Opt {
@@ -49,10 +46,10 @@ impl Manager {
 		self.watcher.watch(to_watch);
 
 		// Publish through DDS
-		Pubsub::pub_from_hover(self.active().idx, self.hovered().map(|h| &h.url));
+		Pubsub::pub_from_hover(self.active().id, self.hovered().map(|h| &h.url));
 	}
 
-	fn hover_do(&mut self, url: Url, tab: Option<usize>) {
+	fn hover_do(&mut self, url: Url, tab: Option<Id>) {
 		// Hover on the file
 		if let Ok(p) = url.strip_prefix(&self.current_or(tab).url).map(PathBuf::from) {
 			render!(self.current_or_mut(tab).repos(Some(Urn::new(&p))));

yazi-core/src/manager/commands/tab_close.rs

@@ -30,7 +30,6 @@ impl Tabs {
 			self.set_idx(self.absolute(1));
 		}
 
-		self.reorder();
 		render!();
 	}
 }

yazi-core/src/manager/commands/tab_create.rs

@@ -36,8 +36,7 @@ impl Tabs {
 			return;
 		}
 
-		let mut tab = Tab { idx: self.cursor + 1, ..Default::default() };
-
+		let mut tab = Tab::default();
 		if !opt.current {
 			tab.cd(opt.url);
 		} else if let Some(h) = self.active().hovered() {
@@ -52,7 +51,6 @@ impl Tabs {
 
 		self.items.insert(self.cursor + 1, tab);
 		self.set_idx(self.cursor + 1);
-		self.reorder();
 		render!();
 	}
 }

yazi-core/src/manager/commands/tab_swap.rs

@@ -21,7 +21,6 @@ impl Tabs {
 
 		self.items.swap(self.cursor, idx);
 		self.set_idx(idx);
-		self.reorder();
 		render!();
 	}
 }

yazi-core/src/manager/commands/update_files.rs

@@ -87,7 +87,7 @@ impl Manager {
 			return;
 		}
 
-		ManagerProxy::hover(None, tab.idx); // Re-hover in next loop
+		ManagerProxy::hover(None, tab.id); // Re-hover in next loop
 		ManagerProxy::update_paged(); // Update for paged files in next loop
 		if calc {
 			tasks.prework_sorted(&tab.current.files);

yazi-core/src/manager/manager.rs

@@ -2,7 +2,7 @@ use ratatui::layout::Rect;
 use yazi_adapter::Dimension;
 use yazi_config::popup::{Origin, Position};
 use yazi_fs::Folder;
-use yazi_shared::fs::{File, Url};
+use yazi_shared::{Id, fs::{File, Url}};
 
 use super::{Mimetype, Tabs, Watcher, Yanked};
 use crate::tab::Tab;
@@ -48,10 +48,10 @@ impl Manager {
 	pub fn active_mut(&mut self) -> &mut Tab { self.tabs.active_mut() }
 
 	#[inline]
-	pub fn active_or(&self, idx: Option<usize>) -> &Tab { self.tabs.active_or(idx) }
+	pub fn active_or(&self, id: Option<Id>) -> &Tab { self.tabs.active_or(id) }
 
 	#[inline]
-	pub fn active_or_mut(&mut self, idx: Option<usize>) -> &mut Tab { self.tabs.active_or_mut(idx) }
+	pub fn active_or_mut(&mut self, id: Option<Id>) -> &mut Tab { self.tabs.active_or_mut(id) }
 
 	#[inline]
 	pub fn current(&self) -> &Folder { &self.active().current }
@@ -60,10 +60,10 @@ impl Manager {
 	pub fn current_mut(&mut self) -> &mut Folder { &mut self.active_mut().current }
 
 	#[inline]
-	pub fn current_or(&self, idx: Option<usize>) -> &Folder { &self.active_or(idx).current }
+	pub fn current_or(&self, idx: Option<Id>) -> &Folder { &self.active_or(idx).current }
 
 	#[inline]
-	pub fn current_or_mut(&mut self, idx: Option<usize>) -> &mut Folder {
+	pub fn current_or_mut(&mut self, idx: Option<Id>) -> &mut Folder {
 		&mut self.active_or_mut(idx).current
 	}
 

yazi-core/src/manager/tabs.rs

@@ -3,7 +3,7 @@ use std::ops::{Deref, DerefMut};
 use yazi_boot::BOOT;
 use yazi_dds::Pubsub;
 use yazi_proxy::ManagerProxy;
-use yazi_shared::fs::Url;
+use yazi_shared::{Id, fs::Url};
 
 use crate::tab::Tab;
 
@@ -16,7 +16,6 @@ impl Tabs {
 	pub fn make() -> Self {
 		let mut tabs =
 			Self { cursor: 0, items: (0..BOOT.cwds.len()).map(|_| Tab::default()).collect() };
-		tabs.reorder();
 
 		for (i, tab) in tabs.iter_mut().enumerate() {
 			let file = &BOOT.files[i];
@@ -37,11 +36,6 @@ impl Tabs {
 		}
 	}
 
-	#[inline]
-	pub(super) fn reorder(&mut self) {
-		self.items.iter_mut().enumerate().for_each(|(i, tab)| tab.idx = i);
-	}
-
 	pub(super) fn set_idx(&mut self, idx: usize) {
 		// Reset the preview of the last active tab
 		if let Some(active) = self.items.get_mut(self.cursor) {
@@ -63,16 +57,16 @@ impl Tabs {
 	pub(super) fn active_mut(&mut self) -> &mut Tab { &mut self.items[self.cursor] }
 
 	#[inline]
-	pub fn active_or(&self, idx: Option<usize>) -> &Tab {
-		idx.and_then(|i| self.items.get(i)).unwrap_or(&self.items[self.cursor])
+	pub fn active_or(&self, id: Option<Id>) -> &Tab {
+		id.and_then(|id| self.iter().find(|&t| t.id == id)).unwrap_or(self.active())
 	}
 
 	#[inline]
-	pub(super) fn active_or_mut(&mut self, idx: Option<usize>) -> &mut Tab {
-		if let Some(i) = idx.filter(|&i| i < self.items.len()) {
+	pub(super) fn active_or_mut(&mut self, id: Option<Id>) -> &mut Tab {
+		if let Some(i) = id.and_then(|id| self.iter().position(|t| t.id == id)) {
 			&mut self.items[i]
 		} else {
-			&mut self.items[self.cursor]
+			self.active_mut()
 		}
 	}
 }

yazi-core/src/tab/commands/arrow.rs

@@ -42,7 +42,7 @@ impl Tab {
 			}
 		}
 
-		ManagerProxy::hover(None, self.idx);
+		ManagerProxy::hover(None, self.id);
 		render!();
 	}
 }

yazi-core/src/tab/commands/cd.rs

@@ -66,7 +66,7 @@ impl Tab {
 			self.backstack.push(opt.target.clone());
 		}
 
-		Pubsub::pub_from_cd(self.idx, self.cwd());
+		Pubsub::pub_from_cd(self.id, self.cwd());
 		ManagerProxy::refresh();
 		render!();
 	}

yazi-core/src/tab/commands/filter_do.rs

@@ -27,7 +27,7 @@ impl Tab {
 
 		self.current.repos(hovered.as_ref().map(|u| u.as_urn()));
 		if self.hovered().map(|f| f.urn()) != hovered.as_ref().map(|u| u.as_urn()) {
-			ManagerProxy::hover(None, self.idx);
+			ManagerProxy::hover(None, self.id);
 		}
 
 		render!();

yazi-core/src/tab/commands/hidden.rs

@@ -15,7 +15,7 @@ impl Tab {
 		self.apply_files_attrs();
 
 		if hovered.as_ref() != self.hovered().map(|f| &f.url) {
-			ManagerProxy::hover(hovered, self.idx);
+			ManagerProxy::hover(hovered, self.id);
 		} else if self.hovered().is_some_and(|f| f.is_dir()) {
 			ManagerProxy::peek(true);
 		}

yazi-core/src/tab/commands/reveal.rs

@@ -30,6 +30,6 @@ impl Tab {
 
 		self.cd(parent.clone());
 		FilesOp::Creating(parent, vec![File::from_dummy(opt.target.clone(), None)]).emit();
-		ManagerProxy::hover(Some(opt.target), self.idx);
+		ManagerProxy::hover(Some(opt.target), self.id);
 	}
 }

yazi-core/src/tab/tab.rs

@@ -7,14 +7,13 @@ use yazi_adapter::Dimension;
 use yazi_config::{LAYOUT, popup::{Origin, Position}};
 use yazi_fs::{Folder, FolderStage};
 use yazi_macro::render;
-use yazi_shared::fs::{File, Url};
+use yazi_shared::{Id, Ids, fs::{File, Url}};
 
 use super::{Backstack, Config, Finder, History, Mode, Preview};
 use crate::tab::Selected;
 
-#[derive(Default)]
 pub struct Tab {
-	pub idx:     usize,
+	pub id:      Id,
 	pub mode:    Mode,
 	pub conf:    Config,
 	pub current: Folder,
@@ -29,6 +28,28 @@ pub struct Tab {
 	pub search:  Option<JoinHandle<Result<()>>>,
 }
 
+impl Default for Tab {
+	fn default() -> Self {
+		static IDS: Ids = Ids::new();
+
+		Self {
+			id:      IDS.next(),
+			mode:    Default::default(),
+			conf:    Default::default(),
+			current: Default::default(),
+			parent:  Default::default(),
+
+			backstack: Default::default(),
+			history:   Default::default(),
+			selected:  Default::default(),
+
+			preview: Default::default(),
+			finder:  Default::default(),
+			search:  Default::default(),
+		}
+	}
+}
+
 impl Tab {
 	pub fn shutdown(&mut self) {
 		if let Some(handle) = self.search.take() {

yazi-dds/src/body/cd.rs

@@ -2,13 +2,13 @@ use std::borrow::Cow;
 
 use mlua::{IntoLua, Lua, Value};
 use serde::{Deserialize, Serialize};
-use yazi_shared::fs::Url;
+use yazi_shared::{Id, fs::Url};
 
 use super::Body;
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct BodyCd<'a> {
-	pub tab: usize,
+	pub tab: Id,
 	pub url: Cow<'a, Url>,
 	#[serde(skip)]
 	dummy:   bool,
@@ -16,14 +16,14 @@ pub struct BodyCd<'a> {
 
 impl<'a> BodyCd<'a> {
 	#[inline]
-	pub fn borrowed(tab: usize, url: &'a Url) -> Body<'a> {
+	pub fn borrowed(tab: Id, url: &'a Url) -> Body<'a> {
 		Self { tab, url: Cow::Borrowed(url), dummy: false }.into()
 	}
 }
 
 impl BodyCd<'static> {
 	#[inline]
-	pub fn dummy(tab: usize) -> Body<'static> {
+	pub fn dummy(tab: Id) -> Body<'static> {
 		Self { tab, url: Default::default(), dummy: true }.into()
 	}
 }
@@ -36,11 +36,11 @@ impl IntoLua<'_> for BodyCd<'static> {
 	fn into_lua(self, lua: &Lua) -> mlua::Result<Value> {
 		if let Some(Cow::Owned(url)) = Some(self.url).filter(|_| !self.dummy) {
 			lua.create_table_from([
-				("tab", self.tab.into_lua(lua)?),
+				("tab", self.tab.get().into_lua(lua)?),
 				("url", lua.create_any_userdata(url)?.into_lua(lua)?),
 			])?
 		} else {
-			lua.create_table_from([("tab", self.tab)])?
+			lua.create_table_from([("tab", self.tab.get())])?
 		}
 		.into_lua(lua)
 	}

yazi-dds/src/body/hover.rs

@@ -2,26 +2,26 @@ use std::borrow::Cow;
 
 use mlua::{IntoLua, Lua, Value};
 use serde::{Deserialize, Serialize};
-use yazi_shared::fs::Url;
+use yazi_shared::{Id, fs::Url};
 
 use super::Body;
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct BodyHover<'a> {
-	pub tab: usize,
+	pub tab: Id,
 	pub url: Option<Cow<'a, Url>>,
 }
 
 impl<'a> BodyHover<'a> {
 	#[inline]
-	pub fn borrowed(tab: usize, url: Option<&'a Url>) -> Body<'a> {
+	pub fn borrowed(tab: Id, url: Option<&'a Url>) -> Body<'a> {
 		Self { tab, url: url.map(Cow::Borrowed) }.into()
 	}
 }
 
 impl BodyHover<'static> {
 	#[inline]
-	pub fn dummy(tab: usize) -> Body<'static> { Self { tab, url: None }.into() }
+	pub fn dummy(tab: Id) -> Body<'static> { Self { tab, url: None }.into() }
 }
 
 impl<'a> From<BodyHover<'a>> for Body<'a> {
@@ -32,11 +32,11 @@ impl IntoLua<'_> for BodyHover<'static> {
 	fn into_lua(self, lua: &Lua) -> mlua::Result<Value> {
 		if let Some(Cow::Owned(url)) = self.url {
 			lua.create_table_from([
-				("tab", self.tab.into_lua(lua)?),
+				("tab", self.tab.get().into_lua(lua)?),
 				("url", lua.create_any_userdata(url)?.into_lua(lua)?),
 			])?
 		} else {
-			lua.create_table_from([("tab", self.tab)])?
+			lua.create_table_from([("tab", self.tab.get())])?
 		}
 		.into_lua(lua)
 	}

yazi-dds/src/pubsub.rs

@@ -3,7 +3,7 @@ use std::collections::{HashMap, HashSet};
 use mlua::Function;
 use parking_lot::RwLock;
 use yazi_boot::BOOT;
-use yazi_shared::{RoCell, fs::Url};
+use yazi_shared::{Id, RoCell, fs::Url};
 
 use crate::{Client, ID, PEERS, body::{Body, BodyBulk, BodyCd, BodyDelete, BodyHi, BodyHover, BodyMove, BodyMoveItem, BodyRename, BodyTab, BodyTrash, BodyYank}};
 
@@ -88,7 +88,7 @@ impl Pubsub {
 		true
 	}
 
-	pub fn pub_from_cd(tab: usize, url: &Url) {
+	pub fn pub_from_cd(tab: Id, url: &Url) {
 		if LOCAL.read().contains_key("cd") {
 			Self::pub_(BodyCd::dummy(tab));
 		}
@@ -100,7 +100,7 @@ impl Pubsub {
 		}
 	}
 
-	pub fn pub_from_hover(tab: usize, url: Option<&Url>) {
+	pub fn pub_from_hover(tab: Id, url: Option<&Url>) {
 		if LOCAL.read().contains_key("hover") {
 			Self::pub_(BodyHover::dummy(tab));
 		}

yazi-fm/src/lives/tab.rs

@@ -23,7 +23,7 @@ impl Tab {
 
 	pub(super) fn register(lua: &Lua) -> mlua::Result<()> {
 		lua.register_userdata_type::<Self>(|reg| {
-			reg.add_field_method_get("idx", |_, me| Ok(me.idx + 1));
+			reg.add_field_method_get("id", |_, me| Ok(me.id.get()));
 			reg.add_method("name", |lua, me, ()| {
 				lua.create_string(me.current.url.name().as_encoded_bytes())
 			});

yazi-fs/src/files.rs

@@ -1,15 +1,15 @@
-use std::{collections::{HashMap, HashSet}, mem, ops::Deref, sync::atomic::Ordering};
+use std::{collections::{HashMap, HashSet}, mem, ops::Deref};
 
 use tokio::{fs::{self, DirEntry}, select, sync::mpsc::{self, UnboundedReceiver}};
 use yazi_config::{MANAGER, manager::SortBy};
-use yazi_shared::fs::{Cha, FILES_TICKET, File, FilesOp, Url, Urn, UrnBuf, maybe_exists};
+use yazi_shared::{Id, fs::{Cha, FILES_TICKET, File, FilesOp, Url, Urn, UrnBuf, maybe_exists}};
 
 use super::{FilesSorter, Filter};
 
 pub struct Files {
 	hidden:       Vec<File>,
 	items:        Vec<File>,
-	ticket:       u64,
+	ticket:       Id,
 	version:      u64,
 	pub revision: u64,
 
@@ -118,7 +118,7 @@ impl Files {
 
 impl Files {
 	pub fn update_full(&mut self, files: Vec<File>) {
-		self.ticket = FILES_TICKET.fetch_add(1, Ordering::Relaxed);
+		self.ticket = FILES_TICKET.next();
 
 		(self.hidden, self.items) = self.split_files(files);
 		if !self.items.is_empty() {
@@ -126,7 +126,7 @@ impl Files {
 		}
 	}
 
-	pub fn update_part(&mut self, files: Vec<File>, ticket: u64) {
+	pub fn update_part(&mut self, files: Vec<File>, ticket: Id) {
 		if !files.is_empty() {
 			if ticket != self.ticket {
 				return;
@@ -162,7 +162,7 @@ impl Files {
 	}
 
 	pub fn update_ioerr(&mut self) {
-		self.ticket = FILES_TICKET.fetch_add(1, Ordering::Relaxed);
+		self.ticket = FILES_TICKET.next();
 		self.hidden.clear();
 		self.items.clear();
 	}
@@ -349,7 +349,7 @@ impl Files {
 
 	// --- Ticket
 	#[inline]
-	pub fn ticket(&self) -> u64 { self.ticket }
+	pub fn ticket(&self) -> Id { self.ticket }
 
 	// --- Sorter
 	#[inline]

yazi-plugin/src/external/highlighter.rs

@@ -1,13 +1,13 @@
-use std::{borrow::Cow, io::Cursor, mem, path::{Path, PathBuf}, sync::atomic::{AtomicUsize, Ordering}};
+use std::{borrow::Cow, io::Cursor, mem, path::{Path, PathBuf}};
 
 use anyhow::{Result, anyhow};
 use ratatui::{layout::Rect, text::{Line, Span, Text}};
 use syntect::{LoadingError, dumps, easy::HighlightLines, highlighting::{self, Theme, ThemeSet}, parsing::{SyntaxReference, SyntaxSet}};
 use tokio::{fs::File, io::{AsyncBufReadExt, BufReader}, sync::OnceCell};
 use yazi_config::{PREVIEW, THEME, preview::PreviewWrap};
-use yazi_shared::{errors::PeekError, replace_to_printable};
+use yazi_shared::{Ids, errors::PeekError, replace_to_printable};
 
-static INCR: AtomicUsize = AtomicUsize::new(0);
+static INCR: Ids = Ids::new();
 static SYNTECT: OnceCell<(Theme, SyntaxSet)> = OnceCell::const_new();
 
 pub struct Highlighter {
@@ -39,7 +39,7 @@ impl Highlighter {
 	}
 
 	#[inline]
-	pub fn abort() { INCR.fetch_add(1, Ordering::Relaxed); }
+	pub fn abort() { INCR.next(); }
 
 	pub async fn highlight(&self, skip: usize, area: Rect) -> Result<Text<'static>, PeekError> {
 		let mut reader = BufReader::new(File::open(&self.path).await?);
@@ -104,13 +104,13 @@ impl Highlighter {
 		after: Vec<String>,
 		syntax: &'static SyntaxReference,
 	) -> Result<Text<'static>, PeekError> {
-		let ticket = INCR.load(Ordering::Relaxed);
+		let ticket = INCR.current();
 		let (theme, syntaxes) = Self::init().await;
 
 		tokio::task::spawn_blocking(move || {
 			let mut h = HighlightLines::new(syntax, theme);
 			for line in before {
-				if ticket != INCR.load(Ordering::Relaxed) {
+				if ticket != INCR.current() {
 					return Err("Highlighting cancelled".into());
 				}
 				h.highlight_line(&line, syntaxes).map_err(|e| anyhow!(e))?;
@@ -119,7 +119,7 @@ impl Highlighter {
 			let indent = PREVIEW.indent();
 			let mut lines = Vec::with_capacity(after.len());
 			for line in after {
-				if ticket != INCR.load(Ordering::Relaxed) {
+				if ticket != INCR.current() {
 					return Err("Highlighting cancelled".into());
 				}
 

yazi-proxy/src/manager.rs

@@ -1,5 +1,5 @@
 use yazi_macro::emit;
-use yazi_shared::{Layer, event::Cmd, fs::Url};
+use yazi_shared::{Id, Layer, event::Cmd, fs::Url};
 
 use crate::options::OpenDoOpt;
 
@@ -12,7 +12,7 @@ impl ManagerProxy {
 	}
 
 	#[inline]
-	pub fn hover(url: Option<Url>, tab: usize) {
+	pub fn hover(url: Option<Url>, tab: Id) {
 		emit!(Call(
 			Cmd::args("hover", &url.map_or_else(Vec::new, |u| vec![u])).with("tab", tab),
 			Layer::Manager

yazi-shared/src/event/data.rs

@@ -143,3 +143,5 @@ impl_integer_as!(isize, as_isize);
 impl_integer_as!(i16, as_i16);
 
 impl_number_as!(f64, as_f64);
+
+impl_integer_as!(crate::Id, as_id);

yazi-shared/src/fs/op.rs

@@ -1,15 +1,15 @@
-use std::{collections::{HashMap, HashSet}, sync::atomic::{AtomicU64, Ordering}};
+use std::collections::{HashMap, HashSet};
 
 use super::{Cha, File, UrnBuf};
-use crate::{Layer, event::Cmd, fs::Url};
+use crate::{Id, Ids, Layer, event::Cmd, fs::Url};
 
-pub static FILES_TICKET: AtomicU64 = AtomicU64::new(0);
+pub static FILES_TICKET: Ids = Ids::new();
 
 #[derive(Clone, Debug)]
 pub enum FilesOp {
 	Full(Url, Vec<File>, Cha),
-	Part(Url, Vec<File>, u64),
-	Done(Url, Cha, u64),
+	Part(Url, Vec<File>, Id),
+	Done(Url, Cha, Id),
 	Size(Url, HashMap<UrnBuf, u64>),
 	IOErr(Url, std::io::ErrorKind),
 
@@ -41,8 +41,8 @@ impl FilesOp {
 		crate::event::Event::Call(Cmd::new("update_files").with_any("op", self), Layer::Manager).emit();
 	}
 
-	pub fn prepare(cwd: &Url) -> u64 {
-		let ticket = FILES_TICKET.fetch_add(1, Ordering::Relaxed);
+	pub fn prepare(cwd: &Url) -> Id {
+		let ticket = FILES_TICKET.next();
 		Self::Part(cwd.clone(), vec![], ticket).emit();
 		ticket
 	}

yazi-shared/src/id.rs

@@ -0,0 +1,54 @@
+use std::{fmt::Display, str::FromStr, sync::atomic::{AtomicUsize, Ordering}};
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Copy, Debug, Default, Hash, Eq, PartialEq, Serialize, Deserialize)]
+pub struct Id(usize);
+
+impl Id {
+	#[inline]
+	pub fn get(&self) -> usize { self.0 }
+}
+
+impl Display for Id {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { self.0.fmt(f) }
+}
+
+impl FromStr for Id {
+	type Err = <usize as FromStr>::Err;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> { s.parse().map(Self) }
+}
+
+impl TryFrom<i64> for Id {
+	type Error = <usize as TryFrom<i64>>::Error;
+
+	fn try_from(value: i64) -> Result<Self, Self::Error> { usize::try_from(value).map(Self) }
+}
+
+// --- Ids
+pub struct Ids {
+	next: AtomicUsize,
+}
+
+impl Ids {
+	#[inline]
+	pub const fn new() -> Self { Self { next: AtomicUsize::new(1) } }
+
+	#[inline]
+	pub fn next(&self) -> Id {
+		loop {
+			let old = self.next.fetch_add(1, Ordering::Relaxed);
+			if old != 0 {
+				return Id(old);
+			}
+		}
+	}
+
+	#[inline]
+	pub fn current(&self) -> Id { Id(self.next.load(Ordering::Relaxed)) }
+}
+
+impl Default for Ids {
+	fn default() -> Self { Self::new() }
+}

yazi-shared/src/lib.rs

@@ -2,10 +2,7 @@
 
 yazi_macro::mod_pub!(errors event fs shell theme translit);
 
-yazi_macro::mod_flat!(
-	chars condition debounce env layer natsort number os rand ro_cell terminal throttle
-	time xdg
-);
+yazi_macro::mod_flat!(chars condition debounce env id layer natsort number os rand ro_cell terminal throttle time xdg);
 
 pub fn init() {
 	#[cfg(unix)]