From 1e827acfdd560a93923e9e6642052b4a887b6378 Mon Sep 17 00:00:00 2001
From: CrispyPin <crispin@tasa.se>
Date: Tue, 28 Feb 2023 12:41:34 +0100
Subject: [PATCH] navigator skeleton

---
 src/editor.rs | 43 +++++++++++++------------
 src/main.rs   | 87 +++++++++++++++++++++++++++++++++++++++++++++++++--
 src/util.rs   |  5 +--
 3 files changed, 107 insertions(+), 28 deletions(-)

diff --git a/src/editor.rs b/src/editor.rs
index db2f0e8..7fc8edb 100644
--- a/src/editor.rs
+++ b/src/editor.rs
@@ -1,6 +1,6 @@
 use std::{
 	fs::{self, File},
-	io::{stdin, stdout, Stdout, Write},
+	io::{stdin, stdout, Write},
 	ops::Range,
 	process::exit,
 };
@@ -8,7 +8,6 @@ use termion::{
 	clear, cursor,
 	event::{Event, Key},
 	input::TermRead,
-	raw::{IntoRawMode, RawTerminal},
 	terminal_size,
 };
 
@@ -22,8 +21,7 @@ pub struct Editor {
 	scroll: usize,
 	cursor: Cursor,
 	path: Option<String>,
-	_term: RawTerminal<Stdout>,
-	quit: bool,
+	pub quit: bool,
 }
 
 #[derive(Debug)]
@@ -47,33 +45,23 @@ impl Editor {
 			})
 			.unwrap_or_default();
 
-		let term = stdout().into_raw_mode().unwrap();
-
-		Editor {
+		let mut this = Editor {
 			text,
 			lines: Vec::new(),
 			scroll: 0,
 			cursor: Cursor { line: 0, column: 0 },
-			_term: term,
 			path,
 			quit: false,
-		}
+		};
+		this.find_lines();
+		this
 	}
 
-	pub fn run(mut self) {
-		print!("{}", clear::All);
-		stdout().flush().unwrap();
-
-		self.find_lines();
-
-		while !self.quit {
-			self.draw();
-			self.input();
-		}
-		print!("{}", clear::All);
+	pub fn name(&self) -> &str {
+		self.path.as_ref().map_or("untitled", |s| &s)
 	}
 
-	fn input(&mut self) {
+	pub fn input(&mut self) {
 		for event in stdin().events().take(1).flatten() {
 			// dbg!(&event);
 			if let Event::Key(key) = event {
@@ -86,6 +74,8 @@ impl Editor {
 					Key::Right => self.move_right(),
 					Key::Up => self.move_up(),
 					Key::Down => self.move_down(),
+					Key::Home => self.move_home(),
+					Key::End => self.move_end(),
 					Key::Ctrl('s') => self.save(),
 					_ => (),
 				}
@@ -141,6 +131,15 @@ impl Editor {
 		}
 	}
 
+	fn move_home(&mut self) {
+		self.cursor.column = 0;
+	}
+
+	fn move_end(&mut self) {
+		self.cursor.column = self.current_line().len();
+		self.ensure_char_boundary();
+	}
+
 	/// Moves cursor left until it is on a character (in case it was in the middle of a multi-byte character)
 	fn ensure_char_boundary(&mut self) {
 		while !self
@@ -169,7 +168,7 @@ impl Editor {
 		self.lines.push(this_line);
 	}
 
-	fn draw(&self) {
+	pub fn draw(&self) {
 		print!("{}", clear::All);
 
 		let max_rows = terminal_size().unwrap().1 as usize - 1;
diff --git a/src/main.rs b/src/main.rs
index d93b448..89fe78d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,92 @@
-use std::env;
+use std::{
+	env,
+	io::{stdin, stdout, Stdout, Write},
+	process::exit,
+};
+use termion::{
+	clear, color,
+	cursor::Goto,
+	event::{Event, Key},
+	input::TermRead,
+	raw::{IntoRawMode, RawTerminal},
+};
 
 mod editor;
 mod util;
 use editor::Editor;
 
 fn main() {
-	Editor::new(env::args().nth(1)).run();
+	Navigator::new(env::args().nth(1)).run();
+}
+
+struct Navigator {
+	editors: Vec<Editor>,
+	active: Option<usize>,
+	selected: Option<usize>,
+	path: String,
+	_term: RawTerminal<Stdout>,
+}
+
+impl Navigator {
+	fn new(immediate_file: Option<String>) -> Self {
+		let term = stdout().into_raw_mode().unwrap();
+		let editors = vec![Editor::new(immediate_file)];
+		Self {
+			editors,
+			active: Some(0),
+			selected: None,
+			path: String::new(), // TODO
+			_term: term,
+		}
+	}
+
+	fn run(mut self) {
+		print!("{}", clear::All);
+		stdout().flush().unwrap();
+
+		loop {
+			if let Some(index) = self.active {
+				self.editors[index].draw();
+				self.editors[index].input();
+
+				if self.editors[index].quit {
+					self.selected = self.active;
+					self.active = None;
+				}
+			} else {
+				self.draw();
+				self.input();
+			}
+		}
+	}
+
+	fn draw(&self) {
+		print!("{}{}Open editors: {}", clear::All, Goto(1,1), self.editors.len());
+
+		for (index, editor) in self.editors.iter().enumerate() {
+			if Some(index) == self.selected {
+				print!("{}{}", color::Fg(color::Black), color::Bg(color::White));
+			}
+			print!("{}{}", Goto(2, index as u16 + 2), editor.name());
+			print!("{}{}", color::Fg(color::Reset), color::Bg(color::Reset));
+		}
+
+		stdout().flush().unwrap();
+	}
+
+	fn input(&mut self) {
+		for event in stdin().events().take(1).flatten() {
+			if let Event::Key(key) = event {
+				match key {
+					Key::Esc => self.quit(),
+					_ => (),
+				}
+			}
+		}
+	}
+
+	fn quit(&self) {
+		print!("{}", clear::All);
+		exit(0);
+	}
 }
diff --git a/src/util.rs b/src/util.rs
index 40d96ba..947d7f2 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,5 +1,4 @@
 use std::io::{stdin, stdout, Write};
-
 use termion::{
 	cursor,
 	event::{Event, Key},
@@ -22,9 +21,7 @@ pub fn read_line(prompt: &str) -> Option<String> {
 				Key::Char('\n') => break,
 				Key::Char(ch) => response.push(ch),
 				Key::Backspace => {
-					if !response.is_empty() {
-						response.remove(response.len() - 1);
-					}
+					response.pop();
 					print!("{start_pos}{:width$}", " ");
 				}
 				Key::Esc => return None,