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extern crate ncurses;
extern crate toml;
pub mod event;
pub mod view;
pub mod printer;
pub mod vec;
pub mod theme;
pub mod align;
pub mod orientation;
mod div;
mod utf8;
use std::any::Any;
use std::rc::Rc;
use std::collections::HashMap;
use std::path::Path;
use vec::Vec2;
use printer::Printer;
use view::View;
use view::{StackView, Selector};
use event::{Event, ToEvent, Key, EventResult, Callback};
pub type ScreenId = usize;
pub struct Cursive {
screens: Vec<StackView>,
active_screen: ScreenId,
running: bool,
global_callbacks: HashMap<Event, Rc<Callback>>,
theme: theme::Theme,
}
impl Cursive {
pub fn new() -> Self {
std::env::set_var("ESCDELAY", "25");
ncurses::setlocale(ncurses::LcCategory::all, "");
ncurses::initscr();
ncurses::keypad(ncurses::stdscr, true);
ncurses::noecho();
ncurses::cbreak();
ncurses::start_color();
ncurses::curs_set(ncurses::CURSOR_VISIBILITY::CURSOR_INVISIBLE);
let theme = theme::load_default();
ncurses::wbkgd(ncurses::stdscr,
ncurses::COLOR_PAIR(theme::ColorPair::Background.ncurses_id()));
let mut res = Cursive {
screens: Vec::new(),
active_screen: 0,
running: true,
global_callbacks: HashMap::new(),
theme: theme,
};
res.screens.push(StackView::new());
res
}
pub fn current_theme(&self) -> &theme::Theme {
&self.theme
}
pub fn load_theme<P: AsRef<Path>>(&mut self, filename: P) -> bool {
match theme::load_theme(filename) {
Err(_) => return false,
Ok(theme) => self.theme = theme,
}
true
}
pub fn set_fps(&self, fps: u32) {
if fps == 0 {
ncurses::timeout(-1);
} else {
ncurses::timeout(1000 / fps as i32);
}
}
pub fn screen_mut(&mut self) -> &mut StackView {
let id = self.active_screen;
self.screens.get_mut(id).unwrap()
}
pub fn add_screen(&mut self) -> ScreenId {
let res = self.screens.len();
self.screens.push(StackView::new());
res
}
pub fn add_active_screen(&mut self) -> ScreenId {
let res = self.add_screen();
self.set_screen(res);
res
}
pub fn set_screen(&mut self, screen_id: ScreenId) {
if screen_id >= self.screens.len() {
panic!("Tried to set an invalid screen ID: {}, but only {} screens present.",
screen_id,
self.screens.len());
}
self.active_screen = screen_id;
}
fn find_any(&mut self, selector: &Selector) -> Option<&mut Any> {
self.screen_mut().find(selector)
}
pub fn find<V: View + Any>(&mut self, selector: &Selector) -> Option<&mut V> {
match self.find_any(selector) {
None => None,
Some(b) => b.downcast_mut::<V>(),
}
}
pub fn find_id<V: View + Any>(&mut self, id: &str) -> Option<&mut V> {
self.find(&Selector::Id(id))
}
pub fn add_global_callback<F, E: ToEvent>(&mut self, event: E, cb: F)
where F: Fn(&mut Cursive) + 'static
{
self.global_callbacks.insert(event.to_event(), Rc::new(Box::new(cb)));
}
pub fn add_layer<T: 'static + View>(&mut self, view: T) {
self.screen_mut().add_layer(view);
}
pub fn pop_layer(&mut self) {
self.screen_mut().pop_layer();
}
fn on_event(&mut self, event: Event) {
let cb = match self.global_callbacks.get(&event) {
None => return,
Some(cb) => cb.clone(),
};
cb(self);
}
pub fn screen_size(&self) -> Vec2 {
let mut x: i32 = 0;
let mut y: i32 = 0;
ncurses::getmaxyx(ncurses::stdscr, &mut y, &mut x);
Vec2 {
x: x as usize,
y: y as usize,
}
}
fn layout(&mut self) {
let size = self.screen_size();
self.screen_mut().layout(size);
}
fn draw(&mut self) {
let printer = Printer::new(self.screen_size(), self.theme.clone());
self.screen_mut().draw(&printer);
ncurses::refresh();
}
fn poll_event() -> Event {
let ch: i32 = ncurses::getch();
if 32 <= ch && ch < 0x100 && ch != 127 {
Event::CharEvent(utf8::read_char(ch as u8, || ncurses::getch() as u8).unwrap())
} else {
Event::KeyEvent(Key::from_ncurses(ch))
}
}
pub fn run(&mut self) {
while self.running {
ncurses::clear();
self.layout();
self.draw();
let event = Cursive::poll_event();
match self.screen_mut().on_event(event) {
EventResult::Ignored => self.on_event(event),
EventResult::Consumed(None) => (),
EventResult::Consumed(Some(cb)) => cb(self),
}
}
}
pub fn quit(&mut self) {
self.running = false;
}
}
impl Drop for Cursive {
fn drop(&mut self) {
ncurses::endwin();
}
}