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use crate::events::messages::Message;
use crate::model::vim_emulator::{VimMode, VimState};
use tui_textarea::{CursorMove, Input, Key, Scrolling};
/// Handles the given input based on the given vim mode
///
/// # Arguments
///
/// * `input` - The input being handled
/// * `vim_state` - The handling is based on this given vim state
/// * `textarea_state` - The handling is also based on this given textarea state
pub fn handle_key_input(input: Input, vim_state: &VimState) -> Message {
if input.key == Key::Null {
return Message::Draw;
}
let vim_mode = vim_state.get_mode();
match vim_mode {
VimMode::Normal | VimMode::Visual => {
match input {
Input {
key: Key::Char('s'),
ctrl: true,
..
} => Message::TextAreaWriteBuffer,
Input {
key: Key::Char('h'),
..
} => Message::TextAreaMoveCursor(CursorMove::Back),
Input {
key: Key::Char('j'),
..
} => Message::TextAreaMoveCursor(CursorMove::Down),
Input {
key: Key::Char('k'),
..
} => Message::TextAreaMoveCursor(CursorMove::Up),
Input {
key: Key::Char('l'),
..
} => Message::TextAreaMoveCursor(CursorMove::Forward),
Input {
key: Key::Char('w'),
..
} => Message::TextAreaMoveCursor(CursorMove::WordForward),
Input {
key: Key::Char('e'),
ctrl: false,
..
} => Message::TextAreaMoveCursor(CursorMove::WordEnd),
Input {
key: Key::Char('b'),
ctrl: false,
..
} => Message::TextAreaMoveCursor(CursorMove::WordBack),
Input {
key: Key::Char('^'),
..
} => Message::TextAreaMoveCursor(CursorMove::Head),
Input {
key: Key::Char('$'),
..
} => Message::TextAreaMoveCursor(CursorMove::End),
Input {
key: Key::Char('D'),
..
} => Message::TextAreaDeleteToEnd,
Input {
key: Key::Char('C'),
..
} => Message::TextAreaCutToEnd,
Input {
key: Key::Char('p'),
..
} => Message::TextAreaPaste,
Input {
key: Key::Char('u'),
ctrl: false,
..
} => Message::TextAreaUndo,
Input {
key: Key::Char('r'),
ctrl: true,
..
} => Message::TextAreaRedo,
Input {
key: Key::Char('x'),
..
} => Message::TextAreaDeleteNextChar,
Input {
key: Key::Char('i'),
..
} => Message::SetVimMode(VimMode::Insert),
Input {
key: Key::Char('a'),
..
} => Message::TextAreaInsertAfter,
Input {
key: Key::Char('A'),
..
} => Message::TextAreaInsertAtEnd,
Input {
key: Key::Char('o'),
..
} => Message::TextAreaInsertAtNewlineAfter,
Input {
key: Key::Char('O'),
..
} => Message::TextAreaInsertAtNewlineBefore,
Input {
key: Key::Char('I'),
..
} => Message::TextAreaInsertAtStart,
Input {
key: Key::Char('q'),
..
} => Message::VimQuit,
Input {
key: Key::Char('e'),
ctrl: true,
..
} => Message::TextAreaScroll((1, 0).into()),
Input {
key: Key::Char('y'),
ctrl: true,
..
} => Message::TextAreaScroll((-1, 0).into()),
Input {
key: Key::Char('d'),
ctrl: true,
..
} => Message::TextAreaScroll(Scrolling::HalfPageDown),
Input {
key: Key::Char('u'),
ctrl: true,
..
} => Message::TextAreaScroll(Scrolling::HalfPageUp),
Input {
key: Key::Char('f'),
ctrl: true,
..
} => Message::TextAreaScroll(Scrolling::PageDown),
Input {
key: Key::Char('b'),
ctrl: true,
..
} => Message::TextAreaScroll(Scrolling::PageUp),
Input { key: Key::Esc, .. }
| Input {
key: Key::Char('v'),
ctrl: false,
..
} if vim_mode == VimMode::Visual => Message::SetVimMode(VimMode::Normal),
Input {
key: Key::Char('v'),
ctrl: false,
..
} => Message::SetVimMode(VimMode::Visual),
Input {
key: Key::Char('V'),
ctrl: false,
..
} if vim_mode == VimMode::Normal => Message::TextAreaStartLineSelection,
Input {
key: Key::Char('g'),
ctrl: false,
..
} if matches!(
vim_state.get_pending_input(),
Input {
key: Key::Char('g'),
ctrl: false,
..
}
) => Message::TextAreaMoveCursor(CursorMove::Top),
Input {
key: Key::Char('G'),
ctrl: false,
..
} => Message::TextAreaMoveCursor(CursorMove::Bottom),
// TODO
// See how to translate this to a single Message
//
// Input {
// key: Key::Char(c),
// ctrl: false,
// ..
// } if vim_mode == VimMode::Operator(c) => {
// Handle yy, dd, cc. (This is not strictly the same behavior as Vim)
// textarea.move_cursor(CursorMove::Head);
// textarea.start_selection();
// let cursor = textarea.cursor();
// textarea.move_cursor(CursorMove::Down);
// if cursor == textarea.cursor() {
// textarea.move_cursor(CursorMove::End); // At the last line, move to end of the line instead
// }
// }
//
// TODO
// See how to translate this to a single Message
// Input {
// key: Key::Char(op @ ('y' | 'd' | 'c')),
// ctrl: false,
// ..
// } if vim_mode == VimMode::Normal => vec![
// Message::TextAreaStartSelection,
// Message::SetVimMode(VimMode::Operator(op)),
// ],
Input {
key: Key::Char('y'),
ctrl: false,
..
} if vim_mode == VimMode::Visual => Message::TextAreaYank,
// textarea.move_cursor(CursorMove::Forward); // Vim's text selection is inclusive
// textarea.copy();
// return VimTransition::Mode(VimMode::Normal);
Input {
key: Key::Char('d'),
ctrl: false,
..
} if vim_mode == VimMode::Visual => Message::TextAreaDelete,
// textarea.move_cursor(CursorMove::Forward); // Vim's text selection is inclusive
// textarea.cut();
// return VimTransition::Mode(VimMode::Normal);
Input {
key: Key::Char('c'),
ctrl: false,
..
} if vim_mode == VimMode::Visual => Message::TextAreaCut,
_ => Message::Draw
}
}
VimMode::Insert => match input {
Input { key: Key::Esc, .. }
| Input {
key: Key::Char('c'),
ctrl: true,
..
} => Message::SetVimMode(VimMode::Normal),
input => {
Message::TextAreaInput(input) // Use default key mappings in insert mode
}
}
}
}