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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..04e750a --- /dev/null +++ b/README.md @@ -0,0 +1,14 @@ +# Bouncing DvD logo + +![demo](assets/demo.gif) + +# Usage + +``` +cargo run + +``` + +# License + +AGPLv3 diff --git a/assets/demo.gif b/assets/demo.gif new file mode 100644 index 0000000..e8c4438 Binary files /dev/null and b/assets/demo.gif differ diff --git a/src/app.rs b/src/app.rs new file mode 100644 index 0000000..3e8b980 --- /dev/null +++ b/src/app.rs @@ -0,0 +1,71 @@ +use std::error; +use tui::layout::Rect; + +pub type AppResult = std::result::Result>; + +#[derive(Debug)] +pub struct App { + pub running: bool, + pub coordinates: (u16, u16), + pub move_left: bool, + pub move_top: bool, +} + +impl Default for App { + fn default() -> Self { + Self { + running: true, + coordinates: (1, 1), + move_left: false, + move_top: false, + } + } +} + +impl App { + pub fn new() -> Self { + Self::default() + } + + pub fn tick(&mut self, term_size: Rect) { + let mut x = self.coordinates.0; + let mut y = self.coordinates.1; + + if x == 0 { + self.move_left = false + } + + if y == 0 { + self.move_top = false + } + + // 31 is the logo width + if x >= term_size.width - 31 { + self.move_left = true; + } + + if y >= term_size.height - 9 { + self.move_top = true + } + + if self.move_left { + x -= 1; + } else { + x += 1; + } + + if self.move_top { + y -= 1; + } else { + y += 1; + } + + self.coordinates = (x, y); + } + + pub fn quit(&mut self) { + self.running = false; + } + + pub fn step(&mut self) {} +} diff --git a/src/event.rs b/src/event.rs new file mode 100644 index 0000000..99f5787 --- /dev/null +++ b/src/event.rs @@ -0,0 +1,77 @@ +use crate::app::AppResult; +use crossterm::event::{self, Event as CrosstermEvent, KeyEvent, MouseEvent}; +use std::sync::mpsc; +use std::thread; +use std::time::{Duration, Instant}; + +/// Terminal events. +#[derive(Clone, Copy, Debug)] +pub enum Event { + /// Terminal tick. + Tick, + /// Key press. + Key(KeyEvent), + /// Mouse click/scroll. + Mouse(MouseEvent), + /// Terminal resize. + Resize(u16, u16), +} + +/// Terminal event handler. +#[allow(dead_code)] +#[derive(Debug)] +pub struct EventHandler { + /// Event sender channel. + sender: mpsc::Sender, + /// Event receiver channel. + receiver: mpsc::Receiver, + /// Event handler thread. + handler: thread::JoinHandle<()>, +} + +impl EventHandler { + /// Constructs a new instance of [`EventHandler`]. + pub fn new(tick_rate: u64) -> Self { + let tick_rate = Duration::from_millis(tick_rate); + let (sender, receiver) = mpsc::channel(); + let handler = { + let sender = sender.clone(); + thread::spawn(move || { + let mut last_tick = Instant::now(); + loop { + let timeout = tick_rate + .checked_sub(last_tick.elapsed()) + .unwrap_or(tick_rate); + + if event::poll(timeout).expect("no events available") { + match event::read().expect("unable to read event") { + CrosstermEvent::Key(e) => sender.send(Event::Key(e)), + CrosstermEvent::Mouse(e) => sender.send(Event::Mouse(e)), + CrosstermEvent::Resize(w, h) => sender.send(Event::Resize(w, h)), + _ => unimplemented!(), + } + .expect("failed to send terminal event") + } + + if last_tick.elapsed() >= tick_rate { + sender.send(Event::Tick).expect("failed to send tick event"); + last_tick = Instant::now(); + } + } + }) + }; + Self { + sender, + receiver, + handler, + } + } + + /// Receive the next event from the handler thread. + /// + /// This function will always block the current thread if + /// there is no data available and it's possible for more data to be sent. + pub fn next(&self) -> AppResult { + Ok(self.receiver.recv()?) + } +} diff --git a/src/handler.rs b/src/handler.rs new file mode 100644 index 0000000..714ed06 --- /dev/null +++ b/src/handler.rs @@ -0,0 +1,21 @@ +use crate::app::{App, AppResult}; +use crossterm::event::{KeyCode, KeyEvent, KeyModifiers}; + +/// Handles the key events and updates the state of [`App`]. +pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> { + match key_event.code { + // Exit application on `ESC` or `q` + KeyCode::Esc | KeyCode::Char('q') => { + app.quit(); + } + // Exit application on `Ctrl-C` + KeyCode::Char('c') | KeyCode::Char('C') => { + if key_event.modifiers == KeyModifiers::CONTROL { + app.quit(); + } + } + // Other handlers you could add here. + _ => {} + } + Ok(()) +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..85ad8bf --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,14 @@ +/// Application. +pub mod app; + +/// Terminal events handler. +pub mod event; + +/// Widget renderer. +pub mod ui; + +/// Terminal user interface. +pub mod tui; + +/// Event handler. +pub mod handler; diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..2e76659 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,33 @@ +use bouncinamation::app::{App, AppResult}; +use bouncinamation::event::{Event, EventHandler}; +use bouncinamation::handler::handle_key_events; +use bouncinamation::tui::Tui; +use std::io; +use tui::backend::CrosstermBackend; +use tui::Terminal; + +fn main() -> AppResult<()> { + let mut app = App::new(); + + let backend = CrosstermBackend::new(io::stderr()); + let terminal = Terminal::new(backend)?; + + let term_size = terminal.size().unwrap(); + let events = EventHandler::new(250); + let mut tui = Tui::new(terminal, events); + + tui.init()?; + + while app.running { + tui.draw(&mut app)?; + match tui.events.next()? { + Event::Tick => app.tick(term_size), + Event::Key(key_event) => handle_key_events(key_event, &mut app)?, + Event::Mouse(_) => {} + Event::Resize(_, _) => {} + } + } + + tui.exit()?; + Ok(()) +} diff --git a/src/tui.rs b/src/tui.rs new file mode 100644 index 0000000..635ccb8 --- /dev/null +++ b/src/tui.rs @@ -0,0 +1,57 @@ +use crate::app::{App, AppResult}; +use crate::event::EventHandler; +use crate::ui; +use crossterm::event::{DisableMouseCapture, EnableMouseCapture}; +use crossterm::terminal::{self, EnterAlternateScreen, LeaveAlternateScreen}; +use std::io; +use tui::backend::Backend; +use tui::Terminal; + +/// Representation of a terminal user interface. +/// +/// It is responsible for setting up the terminal, +/// initializing the interface and handling the draw events. +#[derive(Debug)] +pub struct Tui { + /// Interface to the Terminal. + terminal: Terminal, + /// Terminal event handler. + pub events: EventHandler, +} + +impl Tui { + /// Constructs a new instance of [`Tui`]. + pub fn new(terminal: Terminal, events: EventHandler) -> Self { + Self { terminal, events } + } + + /// Initializes the terminal interface. + /// + /// It enables the raw mode and sets terminal properties. + pub fn init(&mut self) -> AppResult<()> { + terminal::enable_raw_mode()?; + crossterm::execute!(io::stderr(), EnterAlternateScreen, EnableMouseCapture)?; + self.terminal.hide_cursor()?; + self.terminal.clear()?; + Ok(()) + } + + /// [`Draw`] the terminal interface by [`rendering`] the widgets. + /// + /// [`Draw`]: tui::Terminal::draw + /// [`rendering`]: crate::ui:render + pub fn draw(&mut self, app: &mut App) -> AppResult<()> { + self.terminal.draw(|frame| ui::render(app, frame))?; + Ok(()) + } + + /// Exits the terminal interface. + /// + /// It disables the raw mode and reverts back the terminal properties. + pub fn exit(&mut self) -> AppResult<()> { + terminal::disable_raw_mode()?; + crossterm::execute!(io::stderr(), LeaveAlternateScreen, DisableMouseCapture)?; + self.terminal.show_cursor()?; + Ok(()) + } +} diff --git a/src/ui.rs b/src/ui.rs new file mode 100644 index 0000000..101fc00 --- /dev/null +++ b/src/ui.rs @@ -0,0 +1,57 @@ +use tui::{ + backend::Backend, + layout::{Constraint, Direction, Layout, Rect}, + style::Style, + widgets::{Block, Clear, Paragraph}, + Frame, +}; + +use crate::app::App; + +pub fn animation(coordinates: (u16, u16), r: Rect) -> Rect { + let popup_layout = Layout::default() + .direction(Direction::Vertical) + .constraints( + [ + Constraint::Length(coordinates.1), + Constraint::Length(9), + Constraint::Min(1), + ] + .as_ref(), + ) + .split(r); + + Layout::default() + .direction(Direction::Horizontal) + .constraints( + [ + Constraint::Length(coordinates.0), + Constraint::Length(30), + Constraint::Min(1), + ] + .as_ref(), + ) + .split(popup_layout[1])[1] +} + +pub fn render(app: &mut App, frame: &mut Frame<'_, B>) { + let app_area = frame.size(); + + let logo = r#" +⠀⠀⣸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣶⣦⡀ +⠀⢠⣿⣿⡿⠀⠀⠈⢹⣿⣿⡿⣿⣿⣇⠀⣠⣿⣿⠟⣽⣿⣿⠇⠀⠀⢹⣿⣿⣿ +⠀⢸⣿⣿⡇⠀⢀⣠⣾⣿⡿⠃⢹⣿⣿⣶⣿⡿⠋⢰⣿⣿⡿⠀⠀⣠⣼⣿⣿⠏ +⠀⣿⣿⣿⣿⣿⣿⠿⠟⠋⠁⠀⠀⢿⣿⣿⠏⠀⠀⢸⣿⣿⣿⣿⣿⡿⠟⠋⠁⠀ +⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣀⣸⣟⣁⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ + ⣠⣴⣶⣾⣿⣿⣻⡟⣻⣿⢻⣿⡟⣛⢻⣿⡟⣛⣿⡿⣛⣛⢻⣿⣿⣶⣦⣄⡀⠀ +⠉⠛⠻⠿⠿⠿⠷⣼⣿⣿⣼⣿⣧⣭⣼⣿⣧⣭⣿⣿⣬⡭⠾⠿⠿⠿⠛⠉⠀ + "#; + + let block = Paragraph::new(logo) + .alignment(tui::layout::Alignment::Center) + .block(Block::default().style(Style::default())); + + let area = animation(app.coordinates, app_area); + frame.render_widget(Clear, area); + frame.render_widget(block, area); +}