-
Notifications
You must be signed in to change notification settings - Fork 53
/
input.rs
223 lines (212 loc) · 6.9 KB
/
input.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
use crate::crossterm::event::{
Event as CrosstermEvent, KeyCode, KeyEvent, KeyEventKind, KeyModifiers,
MouseEvent as CrosstermMouseEvent, MouseEventKind as CrosstermMouseEventKind,
};
#[cfg(feature = "arbitrary")]
use arbitrary::Arbitrary;
#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
use log::trace;
#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
use termion::event::{Event as TermionEvent, Key as TermionKey, MouseEvent as TermionMouseEvent};
/// Backend-agnostic key input kind.
///
/// This type is marked as `#[non_exhaustive]` since more keys may be supported in the future.
#[non_exhaustive]
#[derive(Clone, Copy, Debug)]
#[cfg_attr(feature = "arbitrary", derive(Arbitrary))]
pub enum Key {
/// Normal letter key input.
Char(char),
/// F1, F2, F3, ... keys.
F(u8),
Backspace,
Enter,
Left,
Right,
Up,
Down,
Tab,
Delete,
Home,
End,
PageUp,
PageDown,
Esc,
/// Virtual key to scroll down by mouse
MouseScrollDown,
/// Virtual key to scroll up by mouse
MouseScrollUp,
/// An invalid key input (this key is always ignored by [`TextArea`](crate::TextArea)).
Null,
}
/// Backend-agnostic key input type.
///
/// When `crossterm` and/or `termion` features are enabled, converting their key input types into this `Input` type is defined.
/// ```no_run
/// use tui_textarea::{TextArea, Input, Key};
/// use crossterm::event::{Event, read};
///
/// let event = read().unwrap();
///
/// // `Input::from` can convert backend-native event into `Input`
/// let input = Input::from(event.clone());
/// // or `Into::into`
/// let input: Input = event.clone().into();
/// // Conversion from `KeyEvent` value is also available
/// if let Event::Key(key) = event {
/// let input = Input::from(key);
/// }
/// ```
///
/// Creating `Input` instance directly can cause backend-agnostic input as follows.
///
/// ```
/// use tui_textarea::{TextArea, Input, Key};
///
/// let mut textarea = TextArea::default();
///
/// // Input Ctrl+A
/// textarea.input(Input {
/// key: Key::Char('a'),
/// ctrl: true,
/// alt: false,
/// });
/// ```
#[derive(Debug, Clone)]
#[cfg_attr(feature = "arbitrary", derive(Arbitrary))]
pub struct Input {
/// Typed key.
pub key: Key,
/// Ctrl modifier key. `true` means Ctrl key was pressed.
pub ctrl: bool,
/// Alt modifier key. `true` means Alt key was pressed.
pub alt: bool,
}
impl Default for Input {
/// The default input is [`Key::Null`] without pressing any modifier keys, which means invalid input.
fn default() -> Self {
Input {
key: Key::Null,
ctrl: false,
alt: false,
}
}
}
#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
impl From<CrosstermEvent> for Input {
/// Convert [`crossterm::event::Event`] to [`Input`].
fn from(event: CrosstermEvent) -> Self {
trace!("Cross Event:{:?}", event);
match event {
CrosstermEvent::Key(key) if key.kind == KeyEventKind::Press => Self::from(key),
CrosstermEvent::Mouse(mouse) => Self::from(mouse),
_ => Self::default(),
}
}
}
#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
impl From<KeyEvent> for Input {
/// Convert [`crossterm::event::KeyEvent`] to [`Input`].
fn from(key: KeyEvent) -> Self {
let ctrl = key.modifiers.contains(KeyModifiers::CONTROL);
let alt = key.modifiers.contains(KeyModifiers::ALT);
let key = match key.code {
KeyCode::Char(c) => Key::Char(c),
KeyCode::Backspace => Key::Backspace,
KeyCode::Enter => Key::Enter,
KeyCode::Left => Key::Left,
KeyCode::Right => Key::Right,
KeyCode::Up => Key::Up,
KeyCode::Down => Key::Down,
KeyCode::Tab => Key::Tab,
KeyCode::Delete => Key::Delete,
KeyCode::Home => Key::Home,
KeyCode::End => Key::End,
KeyCode::PageUp => Key::PageUp,
KeyCode::PageDown => Key::PageDown,
KeyCode::Esc => Key::Esc,
KeyCode::F(x) => Key::F(x),
_ => Key::Null,
};
Self { key, ctrl, alt }
}
}
#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
impl From<CrosstermMouseEvent> for Input {
/// Convert [`crossterm::event::MouseEvent`] to [`Input`].
fn from(mouse: CrosstermMouseEvent) -> Self {
let key = match mouse.kind {
CrosstermMouseEventKind::ScrollDown => Key::MouseScrollDown,
CrosstermMouseEventKind::ScrollUp => Key::MouseScrollUp,
_ => return Self::default(),
};
let ctrl = mouse.modifiers.contains(KeyModifiers::CONTROL);
let alt = mouse.modifiers.contains(KeyModifiers::ALT);
Self { key, ctrl, alt }
}
}
#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
impl From<TermionEvent> for Input {
/// Convert [`termion::event::Event`] to [`Input`].
fn from(event: TermionEvent) -> Self {
match event {
TermionEvent::Key(key) => Self::from(key),
TermionEvent::Mouse(mouse) => Self::from(mouse),
_ => Self::default(),
}
}
}
#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
impl From<TermionKey> for Input {
/// Convert [`termion::event::Key`] to [`Input`].
fn from(key: TermionKey) -> Self {
use TermionKey::*;
let mut ctrl = false;
let mut alt = false;
let key = match key {
Char('\n' | '\r') => Key::Enter,
Char(c) => Key::Char(c),
Ctrl(c) => {
ctrl = true;
Key::Char(c)
}
Alt(c) => {
alt = true;
Key::Char(c)
}
Backspace => Key::Backspace,
Left => Key::Left,
Right => Key::Right,
Up => Key::Up,
Down => Key::Down,
Home => Key::Home,
End => Key::End,
PageUp => Key::PageUp,
PageDown => Key::PageDown,
BackTab => Key::Tab,
Delete => Key::Delete,
Esc => Key::Esc,
F(x) => Key::F(x),
_ => Key::Null,
};
Input { key, ctrl, alt }
}
}
#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
impl From<TermionMouseEvent> for Input {
/// Convert [`termion::event::MouseEvent`] to [`Input`].
fn from(mouse: TermionMouseEvent) -> Self {
use termion::event::MouseButton;
let key = match mouse {
TermionMouseEvent::Press(MouseButton::WheelUp, ..) => Key::MouseScrollUp,
TermionMouseEvent::Press(MouseButton::WheelDown, ..) => Key::MouseScrollDown,
_ => return Self::default(),
};
Self {
key,
ctrl: false,
alt: false,
}
}
}