#![cfg(feature = "bear-lib-terminal")]
#![cfg_attr(feature = "doc-cfg", doc(cfg(feature = "blt-backend")))]
pub use bear_lib_terminal;
use bear_lib_terminal::geometry::Size;
use bear_lib_terminal::terminal::{self, state, Event as BltEvent, KeyCode};
use bear_lib_terminal::Color as BltColor;
use crate::backend;
use crate::event::{Event, Key, MouseButton, MouseEvent};
use crate::theme::{BaseColor, Color, ColorPair, Effect};
use crate::Vec2;
type HashSet<K> = std::collections::HashSet<K, ahash::RandomState>;
enum ColorRole {
Foreground,
Background,
}
pub struct Backend {
buttons_pressed: HashSet<MouseButton>,
mouse_position: Vec2,
}
impl Backend {
pub fn init() -> Box<dyn backend::Backend> {
terminal::open("Cursive", 80, 24);
terminal::set(terminal::config::Window::empty().resizeable(true));
terminal::set(vec![
terminal::config::InputFilter::Group {
group: terminal::config::InputFilterGroup::Keyboard,
both: false,
},
terminal::config::InputFilter::Group {
group: terminal::config::InputFilterGroup::Mouse,
both: true,
},
]);
let c = Backend {
buttons_pressed: HashSet::default(),
mouse_position: Vec2::zero(),
};
Box::new(c)
}
fn parse_next(&mut self) -> Option<Event> {
terminal::read_event().map(|ev| {
match ev {
BltEvent::Close => Event::Exit,
BltEvent::Resize { .. } => Event::WindowResize,
BltEvent::MouseMove { x, y } => {
self.mouse_position = Vec2::new(x as usize, y as usize);
match self.buttons_pressed.iter().next() {
None => Event::Refresh,
Some(btn) => Event::Mouse {
event: MouseEvent::Hold(*btn),
position: self.mouse_position,
offset: Vec2::zero(),
},
}
}
BltEvent::MouseScroll { delta } => Event::Mouse {
event: if delta < 0 {
MouseEvent::WheelUp
} else {
MouseEvent::WheelDown
},
position: self.mouse_position,
offset: Vec2::zero(),
},
BltEvent::KeyPressed { key, ctrl, shift } => {
self.blt_keycode_to_ev(key, shift, ctrl)
}
BltEvent::ShiftPressed => Event::Refresh,
BltEvent::ControlPressed => Event::Refresh,
BltEvent::KeyReleased { key, .. } => {
blt_keycode_to_mouse_button(key)
.map(|btn| {
self.buttons_pressed.remove(&btn);
Event::Mouse {
event: MouseEvent::Release(btn),
position: self.mouse_position,
offset: Vec2::zero(),
}
})
.unwrap_or_else(|| Event::Unknown(vec![]))
}
BltEvent::ShiftReleased | BltEvent::ControlReleased => {
Event::Refresh
}
_ => Event::Unknown(vec![]),
}
})
}
fn blt_keycode_to_ev(
&mut self,
kc: KeyCode,
shift: bool,
ctrl: bool,
) -> Event {
match kc {
KeyCode::F1
| KeyCode::F2
| KeyCode::F3
| KeyCode::F4
| KeyCode::F5
| KeyCode::F6
| KeyCode::F7
| KeyCode::F8
| KeyCode::F9
| KeyCode::F10
| KeyCode::F11
| KeyCode::F12
| KeyCode::NumEnter
| KeyCode::Enter
| KeyCode::Escape
| KeyCode::Backspace
| KeyCode::Tab
| KeyCode::Pause
| KeyCode::Insert
| KeyCode::Home
| KeyCode::PageUp
| KeyCode::Delete
| KeyCode::End
| KeyCode::PageDown
| KeyCode::Right
| KeyCode::Left
| KeyCode::Down
| KeyCode::Up => match (shift, ctrl) {
(true, true) => Event::CtrlShift(blt_keycode_to_key(kc)),
(true, false) => Event::Shift(blt_keycode_to_key(kc)),
(false, true) => Event::Ctrl(blt_keycode_to_key(kc)),
(false, false) => Event::Key(blt_keycode_to_key(kc)),
},
KeyCode::MouseLeft
| KeyCode::MouseRight
| KeyCode::MouseMiddle
| KeyCode::MouseFourth
| KeyCode::MouseFifth => blt_keycode_to_mouse_button(kc)
.map(|btn| {
self.buttons_pressed.insert(btn);
Event::Mouse {
event: MouseEvent::Press(btn),
position: self.mouse_position,
offset: Vec2::zero(),
}
})
.unwrap_or_else(|| Event::Unknown(vec![])),
KeyCode::A
| KeyCode::B
| KeyCode::C
| KeyCode::D
| KeyCode::E
| KeyCode::F
| KeyCode::G
| KeyCode::H
| KeyCode::I
| KeyCode::J
| KeyCode::K
| KeyCode::L
| KeyCode::M
| KeyCode::N
| KeyCode::O
| KeyCode::P
| KeyCode::Q
| KeyCode::R
| KeyCode::S
| KeyCode::T
| KeyCode::U
| KeyCode::V
| KeyCode::W
| KeyCode::X
| KeyCode::Y
| KeyCode::Z
| KeyCode::Row1
| KeyCode::Row2
| KeyCode::Row3
| KeyCode::Row4
| KeyCode::Row5
| KeyCode::Row6
| KeyCode::Row7
| KeyCode::Row8
| KeyCode::Row9
| KeyCode::Row0
| KeyCode::Grave
| KeyCode::Minus
| KeyCode::Equals
| KeyCode::LeftBracket
| KeyCode::RightBracket
| KeyCode::Backslash
| KeyCode::Semicolon
| KeyCode::Apostrophe
| KeyCode::Comma
| KeyCode::Period
| KeyCode::Slash
| KeyCode::Space
| KeyCode::NumDivide
| KeyCode::NumMultiply
| KeyCode::NumMinus
| KeyCode::NumPlus
| KeyCode::NumPeriod
| KeyCode::Num1
| KeyCode::Num2
| KeyCode::Num3
| KeyCode::Num4
| KeyCode::Num5
| KeyCode::Num6
| KeyCode::Num7
| KeyCode::Num8
| KeyCode::Num9
| KeyCode::Num0 => {
if ctrl {
Event::CtrlChar(blt_keycode_to_char(kc, shift))
} else {
Event::Char(blt_keycode_to_char(kc, shift))
}
}
}
}
}
impl Drop for Backend {
fn drop(&mut self) {
terminal::close();
}
}
impl backend::Backend for Backend {
fn name(&self) -> &str {
"bear-lib-terminal"
}
fn set_title(&mut self, title: String) {
terminal::set(terminal::config::Window::empty().title(title));
}
fn set_color(&self, color: ColorPair) -> ColorPair {
let current = ColorPair {
front: blt_colour_to_colour(state::foreground()),
back: blt_colour_to_colour(state::background()),
};
let fg = colour_to_blt_colour(color.front, ColorRole::Foreground);
let bg = colour_to_blt_colour(color.back, ColorRole::Background);
terminal::set_colors(fg, bg);
current
}
fn set_effect(&self, effect: Effect) {
match effect {
Effect::Dim
| Effect::Bold
| Effect::Italic
| Effect::Underline
| Effect::Strikethrough
| Effect::Blink
| Effect::Simple => {}
Effect::Reverse => {
terminal::set_colors(state::background(), state::foreground())
}
}
}
fn unset_effect(&self, effect: Effect) {
match effect {
Effect::Dim
| Effect::Bold
| Effect::Italic
| Effect::Underline
| Effect::Strikethrough
| Effect::Blink
| Effect::Simple => {}
Effect::Reverse => {
terminal::set_colors(state::background(), state::foreground())
}
}
}
fn has_colors(&self) -> bool {
true
}
fn screen_size(&self) -> Vec2 {
let Size { width, height } = terminal::state::size();
(width, height).into()
}
fn clear(&self, color: Color) {
terminal::set_background(colour_to_blt_colour(
color,
ColorRole::Background,
));
terminal::clear(None);
}
fn refresh(&mut self) {
terminal::refresh();
}
fn print_at(&self, pos: Vec2, text: &str) {
terminal::print_xy(pos.x as i32, pos.y as i32, text);
}
fn poll_event(&mut self) -> Option<Event> {
self.parse_next()
}
}
fn blt_colour_to_colour(c: BltColor) -> Color {
Color::Rgb(c.red, c.green, c.blue)
}
fn colour_to_blt_colour(clr: Color, role: ColorRole) -> BltColor {
let (r, g, b) = match clr {
Color::TerminalDefault => {
let clr = match role {
ColorRole::Foreground => state::foreground(),
ColorRole::Background => state::background(),
};
return clr;
}
Color::Dark(BaseColor::Black) => (0, 0, 0),
Color::Dark(BaseColor::Red) => (170, 0, 0),
Color::Dark(BaseColor::Green) => (0, 170, 0),
Color::Dark(BaseColor::Yellow) => (170, 85, 0),
Color::Dark(BaseColor::Blue) => (0, 0, 170),
Color::Dark(BaseColor::Magenta) => (170, 0, 170),
Color::Dark(BaseColor::Cyan) => (0, 170, 170),
Color::Dark(BaseColor::White) => (170, 170, 170),
Color::Light(BaseColor::Black) => (85, 85, 85),
Color::Light(BaseColor::Red) => (255, 85, 85),
Color::Light(BaseColor::Green) => (85, 255, 85),
Color::Light(BaseColor::Yellow) => (255, 255, 85),
Color::Light(BaseColor::Blue) => (85, 85, 255),
Color::Light(BaseColor::Magenta) => (255, 85, 255),
Color::Light(BaseColor::Cyan) => (85, 255, 255),
Color::Light(BaseColor::White) => (255, 255, 255),
Color::Rgb(r, g, b) => (r, g, b),
Color::RgbLowRes(r, g, b) => (
(f32::from(r) / 5.0 * 255.0) as u8,
(f32::from(g) / 5.0 * 255.0) as u8,
(f32::from(b) / 5.0 * 255.0) as u8,
),
};
BltColor::from_rgb(r, g, b)
}
fn blt_keycode_to_char(kc: KeyCode, shift: bool) -> char {
match bear_lib_terminal::terminal::state::char() {
'\u{0}' => blt_keycode_to_char_impl(kc, shift),
c => c,
}
}
#[allow(clippy::cognitive_complexity)]
fn blt_keycode_to_char_impl(kc: KeyCode, shift: bool) -> char {
match kc {
KeyCode::A if shift => 'A',
KeyCode::A => 'a',
KeyCode::B if shift => 'B',
KeyCode::B => 'b',
KeyCode::C if shift => 'C',
KeyCode::C => 'c',
KeyCode::D if shift => 'D',
KeyCode::D => 'd',
KeyCode::E if shift => 'E',
KeyCode::E => 'e',
KeyCode::F if shift => 'F',
KeyCode::F => 'f',
KeyCode::G if shift => 'G',
KeyCode::G => 'g',
KeyCode::H if shift => 'H',
KeyCode::H => 'h',
KeyCode::I if shift => 'I',
KeyCode::I => 'i',
KeyCode::J if shift => 'J',
KeyCode::J => 'j',
KeyCode::K if shift => 'K',
KeyCode::K => 'k',
KeyCode::L if shift => 'L',
KeyCode::L => 'l',
KeyCode::M if shift => 'M',
KeyCode::M => 'm',
KeyCode::N if shift => 'N',
KeyCode::N => 'n',
KeyCode::O if shift => 'O',
KeyCode::O => 'o',
KeyCode::P if shift => 'P',
KeyCode::P => 'p',
KeyCode::Q if shift => 'Q',
KeyCode::Q => 'q',
KeyCode::R if shift => 'R',
KeyCode::R => 'r',
KeyCode::S if shift => 'S',
KeyCode::S => 's',
KeyCode::T if shift => 'T',
KeyCode::T => 't',
KeyCode::U if shift => 'U',
KeyCode::U => 'u',
KeyCode::V if shift => 'V',
KeyCode::V => 'v',
KeyCode::W if shift => 'W',
KeyCode::W => 'w',
KeyCode::X if shift => 'X',
KeyCode::X => 'x',
KeyCode::Y if shift => 'Y',
KeyCode::Y => 'y',
KeyCode::Z if shift => 'Z',
KeyCode::Z => 'z',
KeyCode::Row1 if shift => '!',
KeyCode::Row1 => '1',
KeyCode::Row2 if shift => '@',
KeyCode::Row2 => '2',
KeyCode::Row3 if shift => '#',
KeyCode::Row3 => '3',
KeyCode::Row4 if shift => '$',
KeyCode::Row4 => '4',
KeyCode::Row5 if shift => '%',
KeyCode::Row5 => '5',
KeyCode::Row6 if shift => '^',
KeyCode::Row6 => '6',
KeyCode::Row7 if shift => '&',
KeyCode::Row7 => '7',
KeyCode::Row8 if shift => '*',
KeyCode::Row8 => '8',
KeyCode::Row9 if shift => '(',
KeyCode::Row9 => '9',
KeyCode::Row0 if shift => ')',
KeyCode::Row0 => '0',
KeyCode::Grave if shift => '~',
KeyCode::Grave => '`',
KeyCode::Minus if shift => '_',
KeyCode::Minus => '-',
KeyCode::Equals if shift => '+',
KeyCode::Equals => '=',
KeyCode::LeftBracket if shift => '{',
KeyCode::LeftBracket => '[',
KeyCode::RightBracket if shift => '}',
KeyCode::RightBracket => ']',
KeyCode::Backslash if shift => '|',
KeyCode::Backslash => '\\',
KeyCode::Semicolon if shift => ':',
KeyCode::Semicolon => ';',
KeyCode::Apostrophe if shift => '"',
KeyCode::Apostrophe => '\'',
KeyCode::Comma if shift => '<',
KeyCode::Comma => ',',
KeyCode::Period if shift => '>',
KeyCode::Period => '.',
KeyCode::Slash if shift => '?',
KeyCode::Slash => '/',
KeyCode::Space => ' ',
KeyCode::NumDivide => '/',
KeyCode::NumMultiply => '*',
KeyCode::NumMinus => '-',
KeyCode::NumPlus => '+',
KeyCode::NumPeriod => '.',
KeyCode::Num1 => '1',
KeyCode::Num2 => '2',
KeyCode::Num3 => '3',
KeyCode::Num4 => '4',
KeyCode::Num5 => '5',
KeyCode::Num6 => '6',
KeyCode::Num7 => '7',
KeyCode::Num8 => '8',
KeyCode::Num9 => '9',
KeyCode::Num0 => '0',
_ => unreachable!("Found unknown input: {:?}", kc),
}
}
fn blt_keycode_to_key(kc: KeyCode) -> Key {
match kc {
KeyCode::F1 => Key::F1,
KeyCode::F2 => Key::F2,
KeyCode::F3 => Key::F3,
KeyCode::F4 => Key::F4,
KeyCode::F5 => Key::F5,
KeyCode::F6 => Key::F6,
KeyCode::F7 => Key::F7,
KeyCode::F8 => Key::F8,
KeyCode::F9 => Key::F9,
KeyCode::F10 => Key::F10,
KeyCode::F11 => Key::F11,
KeyCode::F12 => Key::F12,
KeyCode::NumEnter | KeyCode::Enter => Key::Enter,
KeyCode::Escape => Key::Esc,
KeyCode::Backspace => Key::Backspace,
KeyCode::Tab => Key::Tab,
KeyCode::Pause => Key::PauseBreak,
KeyCode::Insert => Key::Ins,
KeyCode::Home => Key::Home,
KeyCode::PageUp => Key::PageUp,
KeyCode::Delete => Key::Del,
KeyCode::End => Key::End,
KeyCode::PageDown => Key::PageDown,
KeyCode::Right => Key::Right,
KeyCode::Left => Key::Left,
KeyCode::Down => Key::Down,
KeyCode::Up => Key::Up,
_ => unreachable!(),
}
}
fn blt_keycode_to_mouse_button(kc: KeyCode) -> Option<MouseButton> {
Some(match kc {
KeyCode::MouseLeft => MouseButton::Left,
KeyCode::MouseRight => MouseButton::Right,
KeyCode::MouseMiddle => MouseButton::Middle,
_ => return None,
})
}