built more of the editor + tui parts

Cargo.lock

@@ -2,6 +2,17 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -20,6 +31,17 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "colored"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3616f750b84d8f0de8a58bda93e08e2a81ad3f523089b05f1dffecab48c6cbd"
+dependencies = [
+ "atty",
+ "lazy_static",
+ "winapi",
+]
+
 [[package]]
 name = "crossterm"
 version = "0.25.0"
@@ -45,13 +67,40 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "ctrlc"
+version = "3.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d91974fbbe88ec1df0c24a4f00f99583667a7e2e6272b2b92d294d81e462173"
+dependencies = [
+ "nix",
+ "winapi",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "lambda"
 version = "0.1.0"
 dependencies = [
+ "colored",
  "crossterm",
+ "ctrlc",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.137"
@@ -89,6 +138,18 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "nix"
+version = "0.25.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e322c04a9e3440c327fca7b6c8a63e6890a32fa2ad689db972425f07e0d22abb"
+dependencies = [
+ "autocfg",
+ "bitflags",
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.1"

Cargo.toml

@@ -5,3 +5,5 @@ edition = "2021"
 
 [dependencies]
 crossterm = "0.25"
+colored = "2"
+ctrlc = "3.2.3"

src/editor.rs

@@ -1,7 +1,11 @@
-enum Mode {
-    Normal,
-    Insert,
-    Select
+pub struct Config<'a> {
+    pub logo: &'a str,
+}
+
+impl<'a> Config<'a> {
+    pub fn new() -> Self {
+        Self { logo: "λ" }
+    }
 }
 
 pub struct Buffer<'a> {
@@ -10,21 +14,41 @@ pub struct Buffer<'a> {
     pub path: &'a str,
 }
 
+pub enum Mode {
+    Normal,
+    Insert,
+    Select,
+    Command,
+}
+
+impl Mode {
+    pub fn as_str(&self) -> &str {
+        match self {
+            Mode::Normal => "NORMAL",
+            Mode::Insert => "INSERT",
+            Mode::Select => "SELECT",
+            Mode::Command => "COMMAND",
+        }
+    }
+}
+
 pub struct Editor<'a> {
+    pub config: Config<'a>,
     pub buffer: Buffer<'a>,
-    pub cursor: [i32; 2],
-    mode: Mode,
+    pub cursors: Vec<i32>,
+    pub mode: Mode,
 }
 
 impl<'a> Editor<'a> {
     pub fn new() -> Self {
         Editor {
+            config: Config::new(),
             buffer: Buffer {
                 data: Vec::from([String::from("Hello"), String::from("World")]),
                 name: "[No Name]",
                 path: "/home/spy",
             },
-            cursor: [0, 0],
+            cursors: Vec::from([0]),
             mode: Mode::Normal,
         }
     }

src/main.rs

@@ -1,18 +1,9 @@
-use std::time::Duration;
-
-mod terminal;
 mod editor;
+mod terminal;
+mod tui;
 
 fn main() {
     let lambda = editor::Editor::new();
-    let mut term = terminal::Terminal::new().unwrap();
-    loop {
-        for line in lambda.buffer.data {
-            terminal::Terminal::write(format!("{line}"));
-            mut term.cursor.move_to(0, 1);
-        };
-        std::thread::sleep(Duration::from_secs(3));
-        break;
-    };
-    terminal::Terminal::exit();
+    let mut screen = terminal::Screen::new().unwrap();
+    tui::start(&mut screen, lambda);
 }

src/terminal.rs

@@ -1,76 +1,124 @@
+use crossterm::cursor::{Hide, MoveTo, Show};
+use crossterm::style::Print;
 use crossterm::terminal;
 use crossterm::{execute, ErrorKind};
-use crossterm::style::Print;
-use crossterm::cursor::{CursorShape, MoveTo};
-use std::io::{stdout, Write};
-
-pub struct Size {
-    pub width: usize,
-    pub height: usize,
-}
+use std::io::stdout;
 
+// Struct for holding coordinates
+#[derive(Copy, Clone)]
 pub struct Coords {
     pub x: usize,
     pub y: usize,
 }
 
+// Creating a coordinates from two values
 impl Coords {
     pub fn from(x: usize, y: usize) -> Self {
-        Self {
-            x: 0,
-            y: 0,
-        }
+        Self { x, y }
     }
 }
 
+// A cursor for writing to the terminal screen
+#[derive(Copy, Clone)]
 pub struct Cursor {
     pub position: Coords,
-    pub shape: CursorShape,
+    pub hidden: bool,
 }
 
+// When a cursor is created
 impl Cursor {
     pub fn new() -> Result<Self, ErrorKind> {
-        let cursor = Self {
+        let mut cursor = Self {
             position: Coords::from(0, 0),
-            shape: CursorShape::Block,
+            hidden: true,
         };
-        Cursor::move_to(&mut cursor, 0, 0);
+        Cursor::move_to(&mut cursor, Coords::from(0, 0));
+        Cursor::hide(&mut cursor);
         Ok(cursor)
     }
+}
 
-    pub fn move_to(&mut self, x: u16, y: u16) {
-        self.position = Coords::from(x as usize, y as usize);
-        execute!(stdout(), MoveTo(x, y)).unwrap()
+// Cursor methods
+impl Cursor {
+    pub fn move_to(&mut self, position: Coords) {
+        // Set the new position of the cursor
+        self.position = position;
+
+        // Move the cursor to the desired posiition in the terminal
+        execute!(stdout(), MoveTo(position.x as u16, position.y as u16)).unwrap();
+    }
+
+    pub fn hide(&mut self) {
+        // Remember that the cursor is hidden
+        self.hidden = true;
+
+        // Hide the cursor from the terminal screen
+        execute!(stdout(), Hide).unwrap();
+    }
+
+    pub fn show(&mut self) {
+        // Remember that the cursor isn't hidden
+        self.hidden = false;
+
+        // Show the cursor to the terminal screen
+        execute!(stdout(), Show).unwrap();
     }
 }
 
-pub struct Terminal {
+// A struct for holding the size of the terminal
+pub struct Size {
+    pub width: usize,
+    pub height: usize,
+}
+
+// The terminal screen
+pub struct Screen {
     pub size: Size,
     pub cursor: Cursor,
 }
 
-impl Terminal {
+// For when a new terminal screen is created
+impl Screen {
     pub fn new() -> Result<Self, ErrorKind> {
+        // Get the size of the terminal
         let size = terminal::size()?;
-        Terminal::clear();
-        Terminal::enter();
-        Ok(Self {
+
+        // Define a new terminal screen struct
+        let mut screen = Self {
             size: Size {
                 width: size.0 as usize,
                 height: size.1 as usize,
             },
             cursor: Cursor::new().unwrap(),
-        })
+        };
+
+        // Empty the terminal screen
+        Screen::clear();
+
+        // Enter the terminal screen
+        screen.enter();
+
+        // Return a result containing the terminal
+        Ok(screen)
+    }
 }
 
-    pub fn enter() {
-        // Enter the current terminal
+// Terminal functions and methods for managing the terminal
+impl Screen {
+    pub fn enter(&mut self) {
+        // Hide the cursor
+        self.cursor.hide();
+
+        // Enter the terminal screen
         terminal::enable_raw_mode().unwrap();
         execute!(stdout(), terminal::EnterAlternateScreen).unwrap();
     }
 
-    pub fn exit() {
-        // Exit the current terminal
+    pub fn exit(&mut self) {
+        // Show the cursor
+        self.cursor.show();
+
+        // Exit the terminal screen
         execute!(stdout(), terminal::LeaveAlternateScreen).unwrap();
         terminal::disable_raw_mode().unwrap();
     }
@@ -84,4 +132,10 @@ impl Terminal {
         // Clears the terminal screen
         execute!(stdout(), terminal::Clear(terminal::ClearType::All)).unwrap();
     }
+
+    pub fn write_at(&mut self, text: String, position: Coords) {
+        // Writes a line at a set of coordinates
+        self.cursor.move_to(position);
+        Screen::write(text);
+    }
 }

src/tui.rs

@@ -0,0 +1,56 @@
+use crate::editor::Editor;
+use crate::terminal::{Coords, Screen};
+use colored::Colorize;
+use crossterm::event::{read, Event, KeyCode, KeyEvent, KeyModifiers};
+
+pub fn draw_status(screen: &mut Screen, editor: &Editor) {
+    // Calculate where to draw the status bar
+    let status_height = screen.size.height - 2;
+
+    // Get the editor logo from the config
+    let editor_logo = &format!(" {} ", editor.config.logo) as &str;
+    // Write the editor logo
+    screen.write_at(
+        editor_logo.bright_yellow().bold().reversed().to_string(),
+        Coords::from(0, status_height),
+    );
+
+    // Get the current mode into a string
+    let mode_string = &format!(" {} ", editor.mode.as_str()) as &str;
+    // Calculate where to write the current mode
+    let x = editor_logo.len() - 1;
+    // Write the current mode
+    screen.write_at(
+        mode_string.green().bold().reversed().to_string(),
+        Coords::from(x, status_height),
+    );
+
+    // Get the current open file name
+    let file_name = &format!(" {} ", editor.buffer.name) as &str;
+    // Calculate where to write the file name
+    let x = editor_logo.len() + mode_string.len() - 1;
+    // Write the current file name
+    screen.write_at(
+        file_name.magenta().bold().reversed().to_string(),
+        Coords::from(x, status_height),
+    );
+}
+
+pub fn start(screen: &mut Screen, editor: Editor) {
+    loop {
+        // Draw the status bar
+        draw_status(screen, &editor);
+
+        // Check for any key presses
+        match read().unwrap() {
+            Event::Key(KeyEvent {
+                code: KeyCode::Char('q'),
+                modifiers: KeyModifiers::CONTROL,
+                ..
+            }) => break,
+            _ => (),
+        }
+    }
+
+    screen.exit();
+}