285 lines
8.0 KiB
Rust
285 lines
8.0 KiB
Rust
/*
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* meli - ui module.
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*
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* Copyright 2017 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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pub mod components;
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pub mod position;
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pub mod cells;
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extern crate termion;
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extern crate ncurses;
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extern crate melib;
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use std::collections::VecDeque;
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/* Color pairs; foreground && background. */
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/// Default color.
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pub static COLOR_PAIR_DEFAULT: i16 = 1;
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/// Highlighted cursor line in index view.
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pub static COLOR_PAIR_CURSOR: i16 = 2;
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/// Header colour in pager view.
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pub static COLOR_PAIR_HEADERS: i16 = 3;
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/// Indentation symbol color in index view.
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pub static COLOR_PAIR_THREAD_INDENT: i16 = 4;
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/// Line color for odd entries in index view.
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pub static COLOR_PAIR_THREAD_ODD: i16 = 5;
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/// Line color for even entries in index view.
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pub static COLOR_PAIR_THREAD_EVEN: i16 = 6;
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/// Line color for unread odd entries in index view.
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pub static COLOR_PAIR_UNREAD_ODD: i16 = 7;
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/// Line color for unread even entries in index view.
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pub static COLOR_PAIR_UNREAD_EVEN: i16 = 8;
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/// `ThreadEvent` encapsulates all of the possible values we need to transfer between our threads
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/// to the main process.
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pub enum ThreadEvent {
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/// User input.
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Input(Key),
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/// A watched folder has been refreshed.
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RefreshMailbox{ name: String },
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UIEventType(UIEventType),
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GoCmd(usize),
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//Decode { _ }, // For gpg2 signature check
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}
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impl From<RefreshEvent> for ThreadEvent {
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fn from(event: RefreshEvent) -> Self {
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ThreadEvent::RefreshMailbox { name: event.folder }
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}
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}
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use melib::*;
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use std;
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use termion::{clear, style, cursor};
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use termion::raw::IntoRawMode;
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use termion::event::{Key as TermionKey, };
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use std::io::{Write, };
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use termion::input::TermRead;
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use self::cells::*;
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pub use self::components::*;
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pub use self::position::*;
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#[derive(Debug)]
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pub enum UIEventType {
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Input(Key),
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RefreshMailbox(Mailbox),
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//Quit?
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Resize,
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ChangeMailbox(usize),
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}
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#[derive(Debug)]
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pub struct UIEvent {
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pub id: u64,
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pub event_type: UIEventType,
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}
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pub struct State<W: Write> {
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cols: usize,
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rows: usize,
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grid: CellBuffer,
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stdout: termion::raw::RawTerminal<W>,
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entities: Vec<Entity>,
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settings: Settings,
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}
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impl<W: Write> Drop for State<W> {
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fn drop(&mut self) {
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// When done, restore the defaults to avoid messing with the terminal.
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write!(self.stdout, "{}{}{}{}", clear::All, style::Reset, cursor::Goto(1, 1), cursor::Show).unwrap();
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}
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}
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impl<W: Write> State<W> {
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pub fn new(stdout: W, settings: Settings) -> Self {
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let termsize = termion::terminal_size().ok();
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let termcols = termsize.map(|(w,_)| w);
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let termrows = termsize.map(|(_,h)| h);
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let cols = termcols.unwrap_or(0) as usize;
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let rows = termrows.unwrap_or(0) as usize;
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let mut s = State {
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cols: cols,
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rows: rows,
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//queue: VecDeque::new();
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grid: CellBuffer::new(cols, rows, Cell::with_char(' ')),
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stdout: stdout.into_raw_mode().unwrap(),
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entities: Vec::with_capacity(1),
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settings: settings,
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};
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write!(s.stdout, "{}{}{}", cursor::Hide, clear::All, cursor::Goto(1,1)).unwrap();
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s
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}
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fn update_size(&mut self) {
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/* update dimensions. TODO: Only do that in size change events. ie SIGWINCH */
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let termsize = termion::terminal_size().ok();
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let termcols = termsize.map(|(w,_)| w);
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let termrows = termsize.map(|(_,h)| h);
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if termcols.unwrap_or(72) as usize != self.cols || termrows.unwrap_or(120) as usize != self.rows {
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eprintln!("Size updated, from ({}, {}) -> ({:?}, {:?})", self.cols, self.rows, termcols, termrows);
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}
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self.cols = termcols.unwrap_or(72) as usize;
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self.rows = termrows.unwrap_or(120) as usize;
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self.grid.resize(self.cols, self.rows, Cell::with_char(' '));
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}
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pub fn render(&mut self) {
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self.update_size();
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/* draw each entity */ for i in 0..self.entities.len() {
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self.draw_entity(i);
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}
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/* Only draw dirty areas */
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for y in 0..self.rows {
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write!(self.stdout, "{}", cursor::Goto(1,(y+1) as u16)).unwrap();
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for x in 0..self.cols {
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let c = self.grid[(x,y)];
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if c.get_bg() != cells::Color::Default {
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write!(self.stdout, "{}", termion::color::Bg(c.get_bg().as_termion()));
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}
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if c.get_fg() != cells::Color::Default {
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write!(self.stdout, "{}", termion::color::Fg(c.get_fg().as_termion()));
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}
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write!(self.stdout, "{}",c.ch()).unwrap();
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if c.get_bg() != cells::Color::Default {
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write!(self.stdout, "{}", termion::color::Bg(termion::color::Reset));
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}
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if c.get_fg() != cells::Color::Default {
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write!(self.stdout, "{}", termion::color::Fg(termion::color::Reset));
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}
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}
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}
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self.stdout.flush().unwrap();
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}
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pub fn draw_entity(&mut self, idx: usize) {
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let ref mut entity = self.entities[idx];
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let upper_left = (0,0);
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let bottom_right = (self.cols-1, self.rows-1);
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entity.component.draw(&mut self.grid, upper_left, bottom_right);
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}
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pub fn register_entity(&mut self, entity: Entity) {
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self.entities.push(entity);
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}
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pub fn rcv_event(&mut self, event: UIEvent) {
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/* pass a queue for replies */
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let mut queue : VecDeque<UIEvent> = VecDeque::new();
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/* inform each entity */ for i in 0..self.entities.len() {
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self.entities[i].rcv_event(&event, &mut queue);
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}
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}
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}
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pub fn convert_key(k: TermionKey ) -> Key {
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match k {
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TermionKey::Backspace => Key::Backspace,
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TermionKey::Left => Key::Left,
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TermionKey::Right => Key::Right,
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TermionKey::Up => Key::Up,
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TermionKey::Down => Key::Down,
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TermionKey::Home => Key::Home,
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TermionKey::End => Key::End,
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TermionKey::PageUp => Key::PageUp,
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TermionKey::PageDown => Key::PageDown,
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TermionKey::Delete => Key::Delete,
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TermionKey::Insert => Key::Insert,
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TermionKey::F(u) => Key::F(u),
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TermionKey::Char(c) => Key::Char(c),
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TermionKey::Alt(c) => Key::Alt(c),
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TermionKey::Ctrl(c) => Key::Ctrl(c),
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TermionKey::Null => Key::Null,
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TermionKey::Esc => Key::Esc,
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_ => Key::Char(' '),
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}
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}
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#[derive(Debug)]
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pub enum Key {
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/// Backspace.
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Backspace,
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/// Left arrow.
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Left,
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/// Right arrow.
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Right,
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/// Up arrow.
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Up,
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/// Down arrow.
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Down,
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/// Home key.
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Home,
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/// End key.
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End,
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/// Page Up key.
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PageUp,
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/// Page Down key.
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PageDown,
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/// Delete key.
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Delete,
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/// Insert key.
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Insert,
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/// Function keys.
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///
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/// Only function keys 1 through 12 are supported.
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F(u8),
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/// Normal character.
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Char(char),
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/// Alt modified character.
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Alt(char),
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/// Ctrl modified character.
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///
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/// Note that certain keys may not be modifiable with `ctrl`, due to limitations of terminals.
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Ctrl(char),
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/// Null byte.
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Null,
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/// Esc key.
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Esc,
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}
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pub fn get_events<F>(stdin: std::io::Stdin, mut closure: F) where F: FnMut(Key) -> (){
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let stdin = stdin.lock();
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for c in stdin.keys() {
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if let Ok(k) = c {
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let k = convert_key(k);
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closure(k);
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}
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}
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}
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