feat: make Input streamable (#127)

core/src/event.rs

@@ -3,8 +3,8 @@ use std::{collections::BTreeMap, ffi::OsString};
 use anyhow::Result;
 use config::{keymap::{Control, KeymapLayer}, open::Opener};
 use crossterm::event::KeyEvent;
-use shared::{RoCell, Url};
-use tokio::sync::{mpsc::UnboundedSender, oneshot};
+use shared::{InputError, RoCell, Url};
+use tokio::sync::{mpsc::{self, UnboundedSender}, oneshot};
 
 use super::{files::{File, FilesOp}, input::InputOpt, select::SelectOpt};
 use crate::manager::PreviewLock;
@@ -32,7 +32,7 @@ pub enum Event {
 
 	// Input
 	Select(SelectOpt, oneshot::Sender<Result<usize>>),
-	Input(InputOpt, oneshot::Sender<Result<String>>),
+	Input(InputOpt, mpsc::UnboundedSender<Result<String, InputError>>),
 
 	// Tasks
 	Open(Vec<(OsString, String)>, Option<Opener>),
@@ -104,8 +104,9 @@ macro_rules! emit {
 		$crate::Event::Select($opt, tx).wait(rx)
 	}};
 	(Input($opt:expr)) => {{
-		let (tx, rx) = tokio::sync::oneshot::channel();
-		$crate::Event::Input($opt, tx).wait(rx)
+		let (tx, rx) = tokio::sync::mpsc::unbounded_channel();
+		$crate::Event::Input($opt, tx).emit();
+		rx
 	}};
 
 	(Open($targets:expr, $opener:expr)) => {

core/src/input/input.rs

@@ -1,10 +1,9 @@
 use std::ops::Range;
 
-use anyhow::{anyhow, Result};
 use config::keymap::Key;
 use crossterm::event::KeyCode;
-use shared::CharKind;
-use tokio::sync::oneshot::Sender;
+use shared::{CharKind, InputError};
+use tokio::sync::mpsc::UnboundedSender;
 use unicode_width::UnicodeWidthStr;
 
 use super::{mode::InputMode, op::InputOp, InputOpt, InputSnap, InputSnaps};
@@ -17,21 +16,27 @@ pub struct Input {
 
 	title:        String,
 	pub position: Position,
-	callback:     Option<Sender<Result<String>>>,
+
+	// Typing
+	callback: Option<UnboundedSender<Result<String, InputError>>>,
+	realtime: bool,
 
 	// Shell
 	pub(super) highlight: bool,
 }
 
 impl Input {
-	pub fn show(&mut self, opt: InputOpt, tx: Sender<Result<String>>) {
+	pub fn show(&mut self, opt: InputOpt, tx: UnboundedSender<Result<String, InputError>>) {
 		self.close(false);
 		self.snaps.reset(opt.value);
 		self.visible = true;
 
 		self.title = opt.title;
 		self.position = opt.position;
+
+		// Typing
 		self.callback = Some(tx);
+		self.realtime = opt.realtime;
 
 		// Shell
 		self.highlight = opt.highlight;
@@ -39,8 +44,8 @@ impl Input {
 
 	pub fn close(&mut self, submit: bool) -> bool {
 		if let Some(cb) = self.callback.take() {
-			let _ =
-				cb.send(if submit { Ok(self.snap_mut().value.clone()) } else { Err(anyhow!("canceled")) });
+			let value = self.snap_mut().value.clone();
+			let _ = cb.send(if submit { Ok(value) } else { Err(InputError::Canceled(value)) });
 		}
 
 		self.visible = false;
@@ -201,22 +206,26 @@ impl Input {
 	}
 
 	pub fn type_str(&mut self, s: &str) -> bool {
-		let snap = self.snap_mut();
+		let snap = self.snaps.current_mut();
 		if snap.cursor < 1 {
 			snap.value.insert_str(0, s);
 		} else {
 			snap.value.insert_str(snap.idx(snap.cursor).unwrap(), s);
 		}
+
+		self.flush_value();
 		self.move_(s.chars().count() as isize)
 	}
 
 	pub fn backspace(&mut self) -> bool {
-		let snap = self.snap_mut();
+		let snap = self.snaps.current_mut();
 		if snap.cursor < 1 {
 			return false;
 		} else {
 			snap.value.remove(snap.idx(snap.cursor - 1).unwrap());
 		}
+
+		self.flush_value();
 		self.move_(-1)
 	}
 
@@ -278,7 +287,7 @@ impl Input {
 
 	fn handle_op(&mut self, cursor: usize, include: bool) -> bool {
 		let old = self.snap().clone();
-		let snap = self.snap_mut();
+		let snap = self.snaps.current_mut();
 
 		match snap.op {
 			InputOp::None | InputOp::Select(_) => {
@@ -296,6 +305,10 @@ impl Input {
 				snap.op = InputOp::None;
 				snap.mode = if insert { InputMode::Insert } else { InputMode::Normal };
 				snap.cursor = range.start;
+
+				if self.realtime {
+					self.callback.as_ref().unwrap().send(Err(InputError::Typed(snap.value.clone()))).ok();
+				}
 			}
 			InputOp::Yank(_) => {
 				let range = snap.op.range(cursor, include).unwrap();
@@ -316,6 +329,14 @@ impl Input {
 		}
 		true
 	}
+
+	#[inline]
+	fn flush_value(&self) {
+		if self.realtime {
+			let value = self.snap().value.clone();
+			self.callback.as_ref().unwrap().send(Err(InputError::Typed(value))).ok();
+		}
+	}
 }
 
 impl Input {

core/src/input/option.rs

@@ -6,6 +6,7 @@ pub struct InputOpt {
 	pub title:     String,
 	pub value:     String,
 	pub position:  Position,
+	pub realtime:  bool,
 	pub highlight: bool,
 }
 
@@ -15,6 +16,7 @@ impl InputOpt {
 			title:     title.as_ref().to_owned(),
 			value:     String::new(),
 			position:  Position::Top(/* TODO: hardcode */ Rect { x: 0, y: 2, width: 50, height: 3 }),
+			realtime:  false,
 			highlight: false,
 		}
 	}
@@ -27,15 +29,24 @@ impl InputOpt {
 				// TODO: hardcode
 				Rect { x: 0, y: 1, width: 50, height: 3 },
 			),
+			realtime:  false,
 			highlight: false,
 		}
 	}
 
+	#[inline]
 	pub fn with_value(mut self, value: impl AsRef<str>) -> Self {
 		self.value = value.as_ref().to_owned();
 		self
 	}
 
+	#[inline]
+	pub fn with_realtime(mut self) -> Self {
+		self.realtime = true;
+		self
+	}
+
+	#[inline]
 	pub fn with_highlight(mut self) -> Self {
 		self.highlight = true;
 		self

core/src/manager/manager.rs

@@ -96,12 +96,12 @@ impl Manager {
 		}
 
 		tokio::spawn(async move {
-			let result = emit!(Input(InputOpt::top(format!(
+			let mut result = emit!(Input(InputOpt::top(format!(
 				"There are {tasks} tasks running, sure to quit? (y/N)"
 			))));
 
-			if let Ok(choice) = result.await {
-				if choice.to_lowercase() == "y" {
+			if let Some(Ok(choice)) = result.recv().await {
+				if choice == "y" || choice == "Y" {
 					emit!(Quit);
 				}
 			}
@@ -179,9 +179,9 @@ impl Manager {
 	pub fn create(&self) -> bool {
 		let cwd = self.cwd().to_owned();
 		tokio::spawn(async move {
-			let result = emit!(Input(InputOpt::top("Create:")));
+			let mut result = emit!(Input(InputOpt::top("Create:")));
 
-			if let Ok(name) = result.await {
+			if let Some(Ok(name)) = result.recv().await {
 				let path = cwd.join(&name);
 				let hovered = path.components().take(cwd.components().count() + 1).collect::<PathBuf>();
 
@@ -212,11 +212,11 @@ impl Manager {
 		};
 
 		tokio::spawn(async move {
-			let result = emit!(Input(
+			let mut result = emit!(Input(
 				InputOpt::hovered("Rename:").with_value(hovered.file_name().unwrap().to_string_lossy())
 			));
 
-			if let Ok(new) = result.await {
+			if let Some(Ok(new)) = result.recv().await {
 				let to = hovered.parent().unwrap().join(new);
 				fs::rename(&hovered, to).await.ok();
 			}

core/src/manager/tab.rs

@@ -1,6 +1,6 @@
 use std::{borrow::Cow, collections::{BTreeMap, BTreeSet}, ffi::{OsStr, OsString}, mem, time::Duration};
 
-use anyhow::{Error, Result};
+use anyhow::{bail, Error, Result};
 use config::open::Opener;
 use shared::{Defer, Url};
 use tokio::{pin, task::JoinHandle};
@@ -123,10 +123,10 @@ impl Tab {
 
 	pub fn cd_interactive(&mut self, target: Url) -> bool {
 		tokio::spawn(async move {
-			let result =
+			let mut result =
 				emit!(Input(InputOpt::top("Change directory:").with_value(target.to_string_lossy())));
 
-			if let Ok(s) = result.await {
+			if let Some(Ok(s)) = result.recv().await {
 				emit!(Cd(Url::from(s)));
 			}
 		});
@@ -241,7 +241,9 @@ impl Tab {
 		let hidden = self.show_hidden;
 
 		self.search = Some(tokio::spawn(async move {
-			let subject = emit!(Input(InputOpt::top("Search:"))).await?;
+			let Some(Ok(subject)) = emit!(Input(InputOpt::top("Search:"))).recv().await else {
+				bail!("canceled")
+			};
 
 			let rx = if grep {
 				external::rg(external::RgOpt { cwd: cwd.clone(), hidden, subject })
@@ -309,10 +311,10 @@ impl Tab {
 		let mut exec = exec.to_owned();
 		tokio::spawn(async move {
 			if !confirm || exec.is_empty() {
-				let result = emit!(Input(InputOpt::top("Shell:").with_value(&exec).with_highlight()));
-				match result.await {
-					Ok(e) => exec = e,
-					Err(_) => return,
+				let mut result = emit!(Input(InputOpt::top("Shell:").with_value(&exec).with_highlight()));
+				match result.recv().await {
+					Some(Ok(e)) => exec = e,
+					_ => return,
 				}
 			}
 

core/src/tasks/tasks.rs

@@ -183,14 +183,14 @@ impl Tasks {
 		let scheduler = self.scheduler.clone();
 		tokio::spawn(async move {
 			let s = if targets.len() > 1 { "s" } else { "" };
-			let result = emit!(Input(InputOpt::hovered(if permanently {
+			let mut result = emit!(Input(InputOpt::hovered(if permanently {
 				format!("Delete selected file{s} permanently? (y/N)")
 			} else {
 				format!("Move selected file{s} to trash? (y/N)")
 			})));
 
-			if let Ok(choice) = result.await {
-				if choice.to_lowercase() != "y" {
+			if let Some(Ok(choice)) = result.recv().await {
+				if choice != "y" && choice != "Y" {
 					return;
 				}
 				for p in targets {

shared/src/errors/input.rs

@@ -0,0 +1,18 @@
+use std::{error::Error, fmt::{self, Display}};
+
+#[derive(Debug)]
+pub enum InputError {
+	Typed(String),
+	Canceled(String),
+}
+
+impl Display for InputError {
+	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+		match self {
+			Self::Typed(text) => write!(f, "Typed error: {text}"),
+			Self::Canceled(text) => write!(f, "Canceled error: {text}"),
+		}
+	}
+}
+
+impl Error for InputError {}

shared/src/errors/mod.rs

@@ -1,3 +1,5 @@
+mod input;
 mod peek;
 
+pub use input::*;
 pub use peek::*;