From a65a1cc9b800578c39a168b45695934b5a69fa37 Mon Sep 17 00:00:00 2001
From: CrispyPin <crispin@tasa.se>
Date: Mon, 27 Feb 2023 21:35:38 +0100
Subject: [PATCH] allow cancelling in save path input prompt

---
 src/editor.rs | 22 ++++++++--------------
 src/main.rs   |  1 +
 src/util.rs   | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 14 deletions(-)
 create mode 100644 src/util.rs

diff --git a/src/editor.rs b/src/editor.rs
index 9c80be4..db2f0e8 100644
--- a/src/editor.rs
+++ b/src/editor.rs
@@ -12,6 +12,8 @@ use termion::{
 	terminal_size,
 };
 
+use crate::util::read_line;
+
 const TAB_SIZE: usize = 4;
 
 pub struct Editor {
@@ -20,7 +22,7 @@ pub struct Editor {
 	scroll: usize,
 	cursor: Cursor,
 	path: Option<String>,
-	term: RawTerminal<Stdout>,
+	_term: RawTerminal<Stdout>,
 	quit: bool,
 }
 
@@ -52,7 +54,7 @@ impl Editor {
 			lines: Vec::new(),
 			scroll: 0,
 			cursor: Cursor { line: 0, column: 0 },
-			term,
+			_term: term,
 			path,
 			quit: false,
 		}
@@ -255,20 +257,12 @@ impl Editor {
 
 	fn save(&mut self) {
 		if self.path.is_none() {
-			self.path = Some(self.read_line("Save as: "));
+			self.path = read_line("Enter path: ");
+			if self.path.is_none() {
+				return;
+			}
 		}
 		let mut file = File::create(self.path.as_ref().unwrap()).unwrap();
 		file.write_all(self.text.as_bytes()).unwrap();
 	}
-
-	fn read_line(&self, prompt: &str) -> String {
-		// TODO: use events instead and allow cancelling with esc
-		self.term.suspend_raw_mode().unwrap();
-		print!("{}{prompt}", cursor::Goto(1, terminal_size().unwrap().1));
-		stdout().flush().unwrap();
-		let mut response = String::new();
-		stdin().read_line(&mut response).unwrap();
-		self.term.activate_raw_mode().unwrap();
-		response.trim_end().into()
-	}
 }
diff --git a/src/main.rs b/src/main.rs
index d25ad80..d93b448 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,7 @@
 use std::env;
 
 mod editor;
+mod util;
 use editor::Editor;
 
 fn main() {
diff --git a/src/util.rs b/src/util.rs
new file mode 100644
index 0000000..40d96ba
--- /dev/null
+++ b/src/util.rs
@@ -0,0 +1,38 @@
+use std::io::{stdin, stdout, Write};
+
+use termion::{
+	cursor,
+	event::{Event, Key},
+	input::TermRead,
+	terminal_size,
+};
+
+pub fn read_line(prompt: &str) -> Option<String> {
+	let mut response = String::new();
+	let size = terminal_size().unwrap();
+	let start_pos = cursor::Goto(1, size.1);
+	let width = size.0 as usize;
+
+	print!("{start_pos}{prompt}{response}",);
+	stdout().flush().unwrap();
+
+	for event in stdin().events() {
+		if let Ok(Event::Key(key)) = event {
+			match key {
+				Key::Char('\n') => break,
+				Key::Char(ch) => response.push(ch),
+				Key::Backspace => {
+					if !response.is_empty() {
+						response.remove(response.len() - 1);
+					}
+					print!("{start_pos}{:width$}", " ");
+				}
+				Key::Esc => return None,
+				_ => (),
+			}
+		}
+		print!("{start_pos}{prompt}{response}",);
+		stdout().flush().unwrap();
+	}
+	Some(response.trim().into())
+}