feat(history): one snap per history

yazi-widgets/src/input/actor/history.rs

@@ -1,5 +1,5 @@
 use anyhow::Result;
-use yazi_macro::{act, render, succ};
+use yazi_macro::{render, succ};
 use yazi_shared::data::Data;
 
 use crate::input::{INPUT_HISTORY, Input, InputOp, parser::HistoryOpt};
@@ -10,14 +10,10 @@ impl Input {
 			succ!();
 		}
 
-		let new_value = INPUT_HISTORY.lock().unwrap().navigate(opt.offset, &self.snap().value);
-		let Some(value) = new_value else { succ!() };
+		if !INPUT_HISTORY.lock().unwrap().navigate(opt.offset, &mut self.snaps, self.limit) {
+			succ!();
+		}
 
-		let snap = self.snap_mut();
-		snap.value = value;
-		snap.cursor = snap.count();
-
-		act!(r#move, self)?;
 		succ!(render!());
 	}
 }

yazi-widgets/src/input/history.rs

@@ -1,17 +1,20 @@
-use std::sync::Mutex;
+use std::{mem, sync::Mutex};
+
+use super::{InputMode, InputSnaps};
 
 pub static INPUT_HISTORY: Mutex<InputHistory> = Mutex::new(InputHistory::new());
 
-#[derive(Debug, Default)]
+#[derive(Default)]
 pub struct InputHistory {
 	entries: Vec<String>,
+	entry_snaps: Vec<Option<InputSnaps>>,
 	idx: Option<usize>,
-	draft: String,
+	draft: Option<InputSnaps>,
 }
 
 impl InputHistory {
 	pub const fn new() -> Self {
-		Self { entries: Vec::new(), idx: None, draft: String::new() }
+		Self { entries: Vec::new(), entry_snaps: Vec::new(), idx: None, draft: None }
 	}
 
 	pub fn push(&mut self, value: String) {
@@ -20,18 +23,19 @@ impl InputHistory {
 		}
 		if self.entries.last().map(String::as_str) != Some(&value) {
 			self.entries.push(value);
+			self.entry_snaps.push(None);
 		}
 		self.reset();
 	}
 
 	pub fn reset(&mut self) {
 		self.idx = None;
-		self.draft.clear();
+		self.draft = None;
 	}
 
-	pub fn navigate(&mut self, step: i64, current: &str) -> Option<String> {
+	pub fn navigate(&mut self, step: i64, snaps: &mut InputSnaps, limit: usize) -> bool {
 		if self.entries.is_empty() || step == 0 {
-			return None;
+			return false;
 		}
 
 		let len = self.entries.len() as i64;
@@ -39,18 +43,42 @@ impl InputHistory {
 		let new_pos = (pos + step).clamp(0, len);
 
 		if new_pos == pos {
-			return None;
+			return false;
 		}
 
-		if new_pos == len {
-			self.idx = None;
-			Some(std::mem::take(&mut self.draft))
+		let mode = snaps.current().mode;
+
+		// Save current snaps into draft or the slot we're leaving
+		let old = mem::take(snaps);
+		if let Some(old_idx) = self.idx {
+			self.entry_snaps[old_idx] = Some(old);
 		} else {
-			if self.idx.is_none() {
-				self.draft = current.to_owned();
-			}
-			self.idx = Some(new_pos as usize);
-			Some(self.entries[new_pos as usize].clone())
+			self.draft = Some(old);
 		}
+
+		// Load target snaps
+		*snaps = if new_pos == len {
+			self.idx = None;
+			self.draft.take().unwrap_or_default()
+		} else {
+			let new_idx = new_pos as usize;
+			self.idx = Some(new_idx);
+			if self.entry_snaps[new_idx].is_none() {
+				let value = self.entries[new_idx].clone();
+				self.entry_snaps[new_idx] = Some(Self::initial_snaps(value, mode, limit));
+			}
+			self.entry_snaps[new_idx].take().unwrap()
+		};
+
+		true
+	}
+
+	fn initial_snaps(value: String, mode: InputMode, limit: usize) -> InputSnaps {
+		let mut snaps = InputSnaps::new(value, false, limit);
+		let snap = snaps.current_mut();
+		snap.mode = mode;
+		snap.cursor = snap.count().saturating_sub(mode.delta());
+		snap.resize(limit);
+		snaps
 	}
 }