use crate::commands; pub use crate::commands::Command; use anyhow::{anyhow, Error, Result}; use helix_core::hashmap; use helix_view::document::Mode; use std::{ collections::HashMap, fmt::Display, ops::{Deref, DerefMut}, str::FromStr, }; // Kakoune-inspired: // mode = { // normal = { // q = record_macro // w = (next) word // W = next WORD // e = end of word // E = end of WORD // r = replace // R = replace with yanked // t = 'till char // y = yank // u = undo // U = redo // i = insert // I = INSERT (start of line) // o = open below (insert on new line below) // O = open above (insert on new line above) // p = paste (before cursor) // P = PASTE (after cursor) // ` = // [ = select to text object start (alt = select whole object) // ] = select to text object end // { = extend to inner object start // } = extend to inner object end // a = append // A = APPEND (end of line) // s = split // S = select // d = delete() // f = find_char() // g = goto (gg, G, gc, gd, etc) // // h = move_char_left(n) || arrow-left = move_char_left(n) // j = move_line_down(n) || arrow-down = move_line_down(n) // k = move_line_up(n) || arrow_up = move_line_up(n) // l = move_char_right(n) || arrow-right = move_char_right(n) // : = command line // ; = collapse selection to cursor // " = use register // ` = convert case? (to lower) (alt = swap case) // ~ = convert to upper case // . = repeat last command // \ = disable hook? // / = search // > = indent // < = deindent // % = select whole buffer (in vim = jump to matching bracket) // * = search pattern in selection // ( = rotate main selection backward // ) = rotate main selection forward // - = trim selections? (alt = merge contiguous sel together) // @ = convert tabs to spaces // & = align cursor // ? = extend to next given regex match (alt = to prev) // // in kakoune these are alt-h alt-l / gh gl // select from curs to begin end / move curs to begin end // 0 = start of line // ^ = start of line(first non blank char) || Home = start of line(first non blank char) // $ = end of line || End = end of line // // z = save selections // Z = restore selections // x = select line // X = extend line // c = change selected text // C = copy selection? // v = view menu (viewport manipulation) // b = select to previous word start // B = select to previous WORD start // // // // // // // = = align? // + = // } // // gd = goto definition // gr = goto reference // [d = previous diagnostic // d] = next diagnostic // [D = first diagnostic // D] = last diagnostic // } // #[cfg(feature = "term")] pub use crossterm::event::{KeyCode, KeyEvent, KeyModifiers}; #[derive(Clone, Debug)] pub struct Keymap(pub HashMap); #[derive(Clone, Debug)] pub struct Keymaps(pub HashMap); #[macro_export] macro_rules! key { ($key:ident) => { KeyEvent { code: KeyCode::$key, modifiers: KeyModifiers::NONE, } }; ($($ch:tt)*) => { KeyEvent { code: KeyCode::Char($($ch)*), modifiers: KeyModifiers::NONE, } }; } macro_rules! ctrl { ($($ch:tt)*) => { KeyEvent { code: KeyCode::Char($($ch)*), modifiers: KeyModifiers::CONTROL, } }; } macro_rules! alt { ($($ch:tt)*) => { KeyEvent { code: KeyCode::Char($($ch)*), modifiers: KeyModifiers::ALT, } }; } impl Default for Keymaps { fn default() -> Self { let normal = Keymap(hashmap!( key!('h') => Command::move_char_left, key!('j') => Command::move_line_down, key!('k') => Command::move_line_up, key!('l') => Command::move_char_right, key!(Left) => Command::move_char_left, key!(Down) => Command::move_line_down, key!(Up) => Command::move_line_up, key!(Right) => Command::move_char_right, key!('t') => Command::find_till_char, key!('f') => Command::find_next_char, key!('T') => Command::till_prev_char, key!('F') => Command::find_prev_char, // and matching set for select mode (extend) // key!('r') => Command::replace, key!('R') => Command::replace_with_yanked, key!(Home) => Command::move_line_start, key!(End) => Command::move_line_end, key!('w') => Command::move_next_word_start, key!('b') => Command::move_prev_word_start, key!('e') => Command::move_next_word_end, key!('v') => Command::select_mode, key!('g') => Command::goto_mode, key!(':') => Command::command_mode, key!('i') => Command::insert_mode, key!('I') => Command::prepend_to_line, key!('a') => Command::append_mode, key!('A') => Command::append_to_line, key!('o') => Command::open_below, key!('O') => Command::open_above, // [ ] equivalents too (add blank new line, no edit) key!('d') => Command::delete_selection, // TODO: also delete without yanking key!('c') => Command::change_selection, // TODO: also change delete without yanking // key!('r') => Command::replace_with_char, key!('s') => Command::select_regex, alt!('s') => Command::split_selection_on_newline, key!('S') => Command::split_selection, key!(';') => Command::collapse_selection, alt!(';') => Command::flip_selections, key!('%') => Command::select_all, key!('x') => Command::extend_line, // extend_to_whole_line, crop_to_whole_line key!('m') => Command::surround, key!('[') => Command::left_bracket_mode, key!(']') => Command::right_bracket_mode, key!('/') => Command::search, // ? for search_reverse key!('n') => Command::search_next, key!('N') => Command::extend_search_next, // N for search_prev key!('*') => Command::search_selection, key!('u') => Command::undo, key!('U') => Command::redo, key!('y') => Command::yank, // yank_all key!('p') => Command::paste_after, // paste_all key!('P') => Command::paste_before, key!('>') => Command::indent, key!('<') => Command::unindent, key!('=') => Command::format_selections, key!('J') => Command::join_selections, // TODO: conflicts hover/doc key!('K') => Command::keep_selections, // TODO: and another method for inverse // TODO: clashes with space mode key!(' ') => Command::keep_primary_selection, // key!('q') => Command::record_macro, // key!('Q') => Command::replay_macro, // ~ / apostrophe => change case // & align selections // _ trim selections // C / altC = copy (repeat) selections on prev/next lines key!(Esc) => Command::normal_mode, key!(PageUp) => Command::page_up, key!(PageDown) => Command::page_down, ctrl!('b') => Command::page_up, ctrl!('f') => Command::page_down, ctrl!('u') => Command::half_page_up, ctrl!('d') => Command::half_page_down, ctrl!('w') => Command::window_mode, // move under c ctrl!('c') => Command::toggle_comments, key!('K') => Command::hover, // z family for save/restore/combine from/to sels from register // supposedly ctrl!('i') but did not work key!(Tab) => Command::jump_forward, ctrl!('o') => Command::jump_backward, // ctrl!('s') => Command::save_selection, key!(' ') => Command::space_mode, key!('z') => Command::view_mode, key!('"') => Command::select_register, )); // TODO: decide whether we want normal mode to also be select mode (kakoune-like), or whether // we keep this separate select mode. More keys can fit into normal mode then, but it's weird // because some selection operations can now be done from normal mode, some from select mode. let mut select = normal.clone(); select.0.extend( hashmap!( key!('h') => Command::extend_char_left, key!('j') => Command::extend_line_down, key!('k') => Command::extend_line_up, key!('l') => Command::extend_char_right, key!(Left) => Command::extend_char_left, key!(Down) => Command::extend_line_down, key!(Up) => Command::extend_line_up, key!(Right) => Command::extend_char_right, key!('w') => Command::extend_next_word_start, key!('b') => Command::extend_prev_word_start, key!('e') => Command::extend_next_word_end, key!('t') => Command::extend_till_char, key!('f') => Command::extend_next_char, key!('T') => Command::extend_till_prev_char, key!('F') => Command::extend_prev_char, key!(Home) => Command::extend_line_start, key!(End) => Command::extend_line_end, key!(Esc) => Command::exit_select_mode, ) .into_iter(), ); Keymaps(hashmap!( // as long as you cast the first item, rust is able to infer the other cases // TODO: select could be normal mode with some bindings merged over Mode::Normal => normal, Mode::Select => select, Mode::Insert => Keymap(hashmap!( key!(Esc) => Command::normal_mode as Command, key!(Backspace) => Command::delete_char_backward, key!(Delete) => Command::delete_char_forward, key!(Enter) => Command::insert_newline, key!(Tab) => Command::insert_tab, key!(Left) => Command::move_char_left, key!(Down) => Command::move_line_down, key!(Up) => Command::move_line_up, key!(Right) => Command::move_char_right, key!(PageUp) => Command::page_up, key!(PageDown) => Command::page_down, key!(Home) => Command::move_line_start, key!(End) => Command::move_line_end, ctrl!('x') => Command::completion, ctrl!('w') => Command::delete_word_backward, )), )) } } // Newtype wrapper over keys to allow toml serialization/parsing #[derive(Debug, PartialEq, PartialOrd, Clone, Copy, Hash)] pub struct RepresentableKeyEvent(pub KeyEvent); impl Display for RepresentableKeyEvent { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { let Self(key) = self; f.write_fmt(format_args!( "{}{}{}", if key.modifiers.contains(KeyModifiers::SHIFT) { "S-" } else { "" }, if key.modifiers.contains(KeyModifiers::ALT) { "A-" } else { "" }, if key.modifiers.contains(KeyModifiers::CONTROL) { "C-" } else { "" }, ))?; match key.code { KeyCode::Backspace => f.write_str("backspace")?, KeyCode::Enter => f.write_str("ret")?, KeyCode::Left => f.write_str("left")?, KeyCode::Right => f.write_str("right")?, KeyCode::Up => f.write_str("up")?, KeyCode::Down => f.write_str("down")?, KeyCode::Home => f.write_str("home")?, KeyCode::End => f.write_str("end")?, KeyCode::PageUp => f.write_str("pageup")?, KeyCode::PageDown => f.write_str("pagedown")?, KeyCode::Tab => f.write_str("tab")?, KeyCode::BackTab => f.write_str("backtab")?, KeyCode::Delete => f.write_str("del")?, KeyCode::Insert => f.write_str("ins")?, KeyCode::Null => f.write_str("null")?, KeyCode::Esc => f.write_str("esc")?, KeyCode::Char('<') => f.write_str("lt")?, KeyCode::Char('>') => f.write_str("gt")?, KeyCode::Char('+') => f.write_str("plus")?, KeyCode::Char('-') => f.write_str("minus")?, KeyCode::Char(';') => f.write_str("semicolon")?, KeyCode::Char('%') => f.write_str("percent")?, KeyCode::F(i) => f.write_fmt(format_args!("F{}", i))?, KeyCode::Char(c) => f.write_fmt(format_args!("{}", c))?, }; Ok(()) } } impl FromStr for RepresentableKeyEvent { type Err = Error; fn from_str(s: &str) -> Result { let mut tokens: Vec<_> = s.split('-').collect(); let code = match tokens.pop().ok_or_else(|| anyhow!("Missing key code"))? { "backspace" => KeyCode::Backspace, "space" => KeyCode::Char(' '), "ret" => KeyCode::Enter, "lt" => KeyCode::Char('<'), "gt" => KeyCode::Char('>'), "plus" => KeyCode::Char('+'), "minus" => KeyCode::Char('-'), "semicolon" => KeyCode::Char(';'), "percent" => KeyCode::Char('%'), "left" => KeyCode::Left, "right" => KeyCode::Right, "up" => KeyCode::Down, "home" => KeyCode::Home, "end" => KeyCode::End, "pageup" => KeyCode::PageUp, "pagedown" => KeyCode::PageDown, "tab" => KeyCode::Tab, "backtab" => KeyCode::BackTab, "del" => KeyCode::Delete, "ins" => KeyCode::Insert, "null" => KeyCode::Null, "esc" => KeyCode::Esc, single if single.len() == 1 => KeyCode::Char(single.chars().next().unwrap()), function if function.len() > 1 && function.starts_with('F') => { let function: String = function.chars().skip(1).collect(); let function = str::parse::(&function)?; (function > 0 && function < 13) .then(|| KeyCode::F(function)) .ok_or_else(|| anyhow!("Invalid function key '{}'", function))? } invalid => return Err(anyhow!("Invalid key code '{}'", invalid)), }; let mut modifiers = KeyModifiers::empty(); for token in tokens { let flag = match token { "S" => KeyModifiers::SHIFT, "A" => KeyModifiers::ALT, "C" => KeyModifiers::CONTROL, _ => return Err(anyhow!("Invalid key modifier '{}-'", token)), }; if modifiers.contains(flag) { return Err(anyhow!("Repeated key modifier '{}-'", token)); } modifiers.insert(flag); } Ok(RepresentableKeyEvent(KeyEvent { code, modifiers })) } } pub fn parse_keymaps(toml_keymaps: &HashMap>) -> Result { let mut keymaps = Keymaps::default(); for (mode, map) in toml_keymaps { let mode = Mode::from_str(&mode)?; for (key, command) in map { let key = str::parse::(&key)?; let command = str::parse::(&command)?; keymaps.0.get_mut(&mode).unwrap().0.insert(key.0, command); } } Ok(keymaps) } impl Deref for Keymap { type Target = HashMap; fn deref(&self) -> &Self::Target { &self.0 } } impl Deref for Keymaps { type Target = HashMap; fn deref(&self) -> &Self::Target { &self.0 } } impl DerefMut for Keymap { fn deref_mut(&mut self) -> &mut Self::Target { &mut self.0 } } impl DerefMut for Keymaps { fn deref_mut(&mut self) -> &mut Self::Target { &mut self.0 } } #[cfg(test)] mod test { use crate::config::Config; use super::*; impl PartialEq for Command { fn eq(&self, other: &Self) -> bool { self.name() == other.name() } } #[test] fn parsing_keymaps_config_file() { let sample_keymaps = r#" [keys.insert] y = "move_line_down" S-C-a = "delete_selection" [keys.normal] A-F12 = "move_next_word_end" "#; let config: Config = toml::from_str(sample_keymaps).unwrap(); assert_eq!( *config .keymaps .0 .get(&Mode::Insert) .unwrap() .0 .get(&KeyEvent { code: KeyCode::Char('y'), modifiers: KeyModifiers::NONE }) .unwrap(), Command::move_line_down ); assert_eq!( *config .keymaps .0 .get(&Mode::Insert) .unwrap() .0 .get(&KeyEvent { code: KeyCode::Char('a'), modifiers: KeyModifiers::SHIFT | KeyModifiers::CONTROL }) .unwrap(), Command::delete_selection ); assert_eq!( *config .keymaps .0 .get(&Mode::Normal) .unwrap() .0 .get(&KeyEvent { code: KeyCode::F(12), modifiers: KeyModifiers::ALT }) .unwrap(), Command::move_next_word_end ); } #[test] fn parsing_unmodified_keys() { assert_eq!( str::parse::("backspace").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::Backspace, modifiers: KeyModifiers::NONE }) ); assert_eq!( str::parse::("left").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::Left, modifiers: KeyModifiers::NONE }) ); assert_eq!( str::parse::(",").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::Char(','), modifiers: KeyModifiers::NONE }) ); assert_eq!( str::parse::("w").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::Char('w'), modifiers: KeyModifiers::NONE }) ); assert_eq!( str::parse::("F12").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::F(12), modifiers: KeyModifiers::NONE }) ); } fn parsing_modified_keys() { assert_eq!( str::parse::("S-minus").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::Char('-'), modifiers: KeyModifiers::SHIFT }) ); assert_eq!( str::parse::("C-A-S-F12").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::F(12), modifiers: KeyModifiers::SHIFT | KeyModifiers::CONTROL | KeyModifiers::ALT }) ); assert_eq!( str::parse::("S-C-2").unwrap(), RepresentableKeyEvent(KeyEvent { code: KeyCode::F(2), modifiers: KeyModifiers::SHIFT | KeyModifiers::CONTROL }) ); } #[test] fn parsing_nonsensical_keys_fails() { assert!(str::parse::("F13").is_err()); assert!(str::parse::("F0").is_err()); assert!(str::parse::("aaa").is_err()); assert!(str::parse::("S-S-a").is_err()); assert!(str::parse::("C-A-S-C-1").is_err()); assert!(str::parse::("FU").is_err()); assert!(str::parse::("123").is_err()); assert!(str::parse::("S--").is_err()); } }