forked from mars/breed
Merge branch 'main' into main
This commit is contained in:
commit
6049ee6136
|
|
@ -19,7 +19,10 @@
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|||
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||||
use std::collections::HashMap;
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||||
|
||||
use crate::{Cursor, Direction, InsertState, Mode, State};
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use crate::{
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state::{InsertState, Mode, State},
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Cursor, Direction,
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};
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pub type Action = fn(&mut State);
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||||
|
|
@ -29,6 +32,12 @@ pub fn load_actions() -> HashMap<String, Action> {
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("move_line_down", move_line_down),
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("move_line_up", move_line_up),
|
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("move_char_right", move_char_right),
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("move_next_word_start", move_next_word_start),
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("move_prev_word_start", move_prev_word_start),
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("move_next_word_end", move_next_word_end),
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("move_next_long_word_start", move_next_long_word_start),
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("move_prev_long_word_start", move_prev_long_word_start),
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("move_next_long_word_end", move_next_long_word_end),
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("page_up", page_up),
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("page_down", page_down),
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("goto_line_start", goto_line_start),
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|
|
@ -75,6 +84,30 @@ pub fn move_line_up(state: &mut State) {
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state.move_cursor(Direction::Up);
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}
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pub fn move_next_word_start(state: &mut State) {
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state.set_error("move_next_word_start is unimplemented");
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}
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pub fn move_prev_word_start(state: &mut State) {
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state.set_error("move_prev_word_start is unimplemented");
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}
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pub fn move_next_word_end(state: &mut State) {
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state.set_error("move_next_word_end is unimplemented");
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}
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pub fn move_next_long_word_start(state: &mut State) {
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state.set_error("move_next_long_word_start is unimplemented");
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}
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|
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pub fn move_prev_long_word_start(state: &mut State) {
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state.set_error("move_prev_long_word_start is unimplemented");
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}
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pub fn move_next_long_word_end(state: &mut State) {
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state.set_error("move_next_long_word_end is unimplemented");
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}
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pub fn page_up(state: &mut State) {
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state.set_error("page_up is unimplemented");
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}
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|
|
@ -127,10 +160,12 @@ pub fn visual_mode(state: &mut State) {
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}
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pub fn insert_mode(state: &mut State) {
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state.save_buffer();
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state.mode = Mode::Insert(InsertState { append: false });
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}
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|
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pub fn append_mode(state: &mut State) {
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state.save_buffer();
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state.move_cursor(Direction::Right);
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state.mode = Mode::Insert(InsertState { append: true });
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}
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|
|
@ -146,24 +181,24 @@ pub fn insert_at_line_end(state: &mut State) {
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}
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pub fn open_below(state: &mut State) {
|
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insert_mode(state);
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state.cursor.line += 1;
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state.cursor.column = 0;
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state.buffer.insert_char(state.cursor, '\n');
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state.mode = Mode::Insert(InsertState { append: false });
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}
|
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|
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pub fn open_above(state: &mut State) {
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insert_mode(state);
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state.cursor.column = 0;
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state.buffer.insert_char(state.cursor, '\n');
|
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state.mode = Mode::Insert(InsertState { append: false });
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}
|
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|
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pub fn undo(state: &mut State) {
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state.set_error("undo is unimplemented");
|
||||
state.undo();
|
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}
|
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|
||||
pub fn redo(state: &mut State) {
|
||||
state.set_error("redo is unimplemented");
|
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state.redo();
|
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}
|
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|
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pub fn delete_char_backward(state: &mut State) {
|
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|
|
|
|||
|
|
@ -64,6 +64,12 @@ impl Default for Keybinds {
|
|||
(Char('j'), move_line_down),
|
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(Char('k'), move_line_up),
|
||||
(Char('l'), move_char_right),
|
||||
(Char('w'), move_next_word_start),
|
||||
(Char('b'), move_prev_word_start),
|
||||
(Char('e'), move_next_word_end),
|
||||
(Char('W'), move_next_long_word_start),
|
||||
(Char('B'), move_prev_long_word_start),
|
||||
(Char('E'), move_next_long_word_end),
|
||||
(Char('i'), insert_mode),
|
||||
(Char('a'), append_mode),
|
||||
(Char('I'), insert_at_line_start),
|
||||
|
|
|
|||
366
src/main.rs
366
src/main.rs
|
|
@ -20,72 +20,28 @@
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|||
use std::{
|
||||
env::args,
|
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ffi::OsString,
|
||||
fs::{File, OpenOptions},
|
||||
fs::File,
|
||||
io::{Read, Stdout, Write},
|
||||
os::fd::FromRawFd,
|
||||
path::{Path, PathBuf},
|
||||
sync::Arc,
|
||||
path::Path,
|
||||
};
|
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|
||||
use crossbeam_channel::Sender;
|
||||
use crossterm::{
|
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cursor,
|
||||
event::{Event, KeyCode, KeyEvent},
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terminal, QueueableCommand, Result,
|
||||
};
|
||||
use parking_lot::Mutex;
|
||||
use ropey::Rope;
|
||||
use crossterm::{terminal, QueueableCommand, Result};
|
||||
use yacexits::{exit, EX_DATAERR, EX_UNAVAILABLE};
|
||||
|
||||
mod actions;
|
||||
mod buffer;
|
||||
mod config;
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||||
mod keybinds;
|
||||
mod state;
|
||||
mod theme;
|
||||
|
||||
use buffer::Buffer;
|
||||
use config::Config;
|
||||
use keybinds::{Key, Keybind};
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use theme::StyleStore;
|
||||
|
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#[derive(Copy, Clone, Debug, Default)]
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||||
pub struct Cursor {
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||||
pub column: usize,
|
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pub line: usize,
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, Default)]
|
||||
pub struct CommandState {
|
||||
pub buf: String,
|
||||
pub cursor: usize,
|
||||
}
|
||||
|
||||
#[derive(Copy, Clone, Debug)]
|
||||
pub struct InsertState {
|
||||
append: bool,
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, Default)]
|
||||
pub enum Mode {
|
||||
#[default]
|
||||
Normal,
|
||||
Command(CommandState),
|
||||
Visual,
|
||||
Insert(InsertState),
|
||||
}
|
||||
|
||||
impl Mode {
|
||||
pub fn cursor_style(&self) -> cursor::SetCursorStyle {
|
||||
use cursor::SetCursorStyle as Style;
|
||||
match self {
|
||||
Mode::Normal => Style::SteadyBlock,
|
||||
Mode::Visual => Style::BlinkingBlock,
|
||||
Mode::Insert(_) => Style::BlinkingBar,
|
||||
Mode::Command(_) => Style::SteadyUnderScore,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Copy, Clone, Debug)]
|
||||
pub enum Direction {
|
||||
Left,
|
||||
|
|
@ -94,317 +50,7 @@ pub enum Direction {
|
|||
Right,
|
||||
}
|
||||
|
||||
pub struct State {
|
||||
pub styles: Arc<Mutex<StyleStore>>,
|
||||
pub config: Config,
|
||||
pub buffer: Buffer,
|
||||
pub cursor: Cursor,
|
||||
pub file: Option<OsString>,
|
||||
pub mode: Mode,
|
||||
pub submode: Option<Key>,
|
||||
pub last_saved: Rope,
|
||||
pub scroll: Cursor,
|
||||
pub size: (usize, usize),
|
||||
pub quit: bool,
|
||||
pub error: Option<String>,
|
||||
pub theme_tx: Sender<PathBuf>,
|
||||
}
|
||||
|
||||
impl State {
|
||||
pub fn from_str(file_name: Option<OsString>, text: &str) -> Result<Self> {
|
||||
let styles = Arc::new(Mutex::new(StyleStore::default()));
|
||||
let buffer = Buffer::from_str(styles.clone(), text);
|
||||
let last_saved = buffer.as_ref().clone();
|
||||
let (cols, rows) = terminal::size()?;
|
||||
let theme_tx = config::ThemeWatcher::spawn(styles.clone());
|
||||
|
||||
Ok(Self {
|
||||
styles,
|
||||
config: Default::default(),
|
||||
buffer,
|
||||
cursor: Cursor::default(),
|
||||
file: file_name,
|
||||
mode: Mode::default(),
|
||||
submode: None,
|
||||
last_saved,
|
||||
scroll: Cursor::default(),
|
||||
size: (cols as usize, rows as usize),
|
||||
quit: false,
|
||||
error: None,
|
||||
theme_tx,
|
||||
})
|
||||
}
|
||||
|
||||
pub fn draw(&mut self, out: &mut impl Write) -> Result<()> {
|
||||
// begin update
|
||||
let (cols, rows) = terminal::size()?;
|
||||
out.queue(terminal::BeginSynchronizedUpdate)?;
|
||||
out.queue(terminal::Clear(terminal::ClearType::All))?;
|
||||
let mut styles = self.styles.lock();
|
||||
|
||||
// draw status line
|
||||
let mut set_cursor_pos = None;
|
||||
let mut show_status_bar = false;
|
||||
|
||||
if let Mode::Command(CommandState { buf, cursor }) = &self.mode {
|
||||
let col = *cursor as u16 + 1;
|
||||
let row = rows - 1;
|
||||
out.queue(cursor::MoveTo(0, row))?;
|
||||
write!(out, ":{}", buf)?;
|
||||
set_cursor_pos = Some((col, row));
|
||||
show_status_bar = true;
|
||||
} else if let Some(error) = self.error.as_ref() {
|
||||
let error_style = styles.get_scope("error");
|
||||
out.queue(cursor::MoveTo(0, rows - 1))?;
|
||||
error_style.print_styled(out, error)?;
|
||||
show_status_bar = true;
|
||||
}
|
||||
|
||||
// done with styles
|
||||
drop(styles);
|
||||
|
||||
// draw buffer
|
||||
let buffer_rows = if show_status_bar { rows - 1 } else { rows };
|
||||
let lr_width = self
|
||||
.buffer
|
||||
.draw(cols, buffer_rows, self.scroll, self.cursor, out)?;
|
||||
|
||||
// draw submode
|
||||
if let Some(submode) = self.submode {
|
||||
out.queue(cursor::MoveTo(cols - 10, rows - 1))?;
|
||||
write!(out, "{:?}", submode)?;
|
||||
}
|
||||
|
||||
// draw cursor
|
||||
let cursor_pos = set_cursor_pos.unwrap_or_else(|| {
|
||||
// calculate cursor position on buffer
|
||||
let cursor = self.buffer.clamped_cursor(self.cursor);
|
||||
let col = cursor.column.saturating_sub(self.scroll.column) as u16;
|
||||
let row = cursor.line.saturating_sub(self.scroll.line) as u16;
|
||||
let col = col + lr_width as u16;
|
||||
(col, row)
|
||||
});
|
||||
|
||||
out.queue(cursor::MoveTo(cursor_pos.0, cursor_pos.1))?;
|
||||
out.queue(self.mode.cursor_style())?;
|
||||
|
||||
// finish update
|
||||
out.queue(terminal::EndSynchronizedUpdate)?;
|
||||
out.flush()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// Sets the current error message.
|
||||
pub fn set_error(&mut self, error: impl ToString) {
|
||||
self.error = Some(error.to_string());
|
||||
}
|
||||
|
||||
pub fn on_event(&mut self, event: Event) {
|
||||
// reset the error from the last event
|
||||
self.error = None;
|
||||
|
||||
match event {
|
||||
Event::Resize(cols, rows) => {
|
||||
self.size = (cols as usize, rows as usize);
|
||||
}
|
||||
Event::Key(KeyEvent { code, .. }) => match &self.mode {
|
||||
Mode::Normal | Mode::Visual => {
|
||||
self.on_key(code);
|
||||
}
|
||||
Mode::Command(state) => self.on_command_key(code, state.clone()),
|
||||
Mode::Insert(_) => {
|
||||
if !self.on_key(code) {
|
||||
if let KeyCode::Char(c) = code {
|
||||
self.buffer.insert_char(self.cursor, c);
|
||||
self.move_cursor(Direction::Right);
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
fn on_command_key(&mut self, code: KeyCode, mut state: CommandState) {
|
||||
match code {
|
||||
KeyCode::Char(c) => {
|
||||
state.buf.insert(state.cursor, c);
|
||||
state.cursor += 1;
|
||||
}
|
||||
KeyCode::Backspace => {
|
||||
if state.cursor > 0 {
|
||||
state.cursor -= 1;
|
||||
state.buf.remove(state.cursor);
|
||||
}
|
||||
}
|
||||
KeyCode::Delete if state.cursor < state.buf.len() => {
|
||||
state.buf.remove(state.cursor);
|
||||
}
|
||||
KeyCode::Left if state.cursor > 0 => {
|
||||
state.cursor -= 1;
|
||||
}
|
||||
KeyCode::Right if state.cursor < state.buf.len() => {
|
||||
state.cursor += 1;
|
||||
}
|
||||
KeyCode::Enter => {
|
||||
// TODO add to command history
|
||||
let _ = self
|
||||
.execute_command(&state.buf)
|
||||
.map_err(|err| self.set_error(err));
|
||||
self.mode = Mode::Normal;
|
||||
return;
|
||||
}
|
||||
KeyCode::Esc => {
|
||||
self.mode = Mode::default();
|
||||
return;
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
|
||||
self.mode = Mode::Command(state);
|
||||
}
|
||||
|
||||
/// Processes a key press event.
|
||||
///
|
||||
/// Returns `true` if the key was handled by a keybind, `false` otherwise.
|
||||
fn on_key(&mut self, key: Key) -> bool {
|
||||
let keybinds = match &self.mode {
|
||||
Mode::Normal => &self.config.keybinds.normal,
|
||||
Mode::Insert(_) => &self.config.keybinds.insert,
|
||||
Mode::Visual => &self.config.keybinds.visual,
|
||||
Mode::Command(_) => return false, // command mode is handled in [on_command_event]
|
||||
};
|
||||
|
||||
if let Some(submode) = self.submode {
|
||||
// if we're currently in a submode, try to run this submode's keybind
|
||||
keybinds
|
||||
.submodes
|
||||
.get(&submode)
|
||||
.and_then(|submode| submode.get(&key))
|
||||
.cloned()
|
||||
.map(|keybind| self.execute_keybind(keybind));
|
||||
// whether or not there is a keybind we exit the submode
|
||||
self.submode = None;
|
||||
} else if keybinds.submodes.contains_key(&key) {
|
||||
// enter a submode if available
|
||||
self.submode = Some(key);
|
||||
} else if let Some(keybind) = keybinds.map.get(&key) {
|
||||
// run the keybind if available
|
||||
self.execute_keybind(keybind.clone());
|
||||
} else {
|
||||
// key is not bound; don't handle
|
||||
return false;
|
||||
}
|
||||
|
||||
true
|
||||
}
|
||||
|
||||
fn write_buffer(&mut self, file: OsString) -> Result<()> {
|
||||
self.last_saved = self.buffer.as_ref().clone();
|
||||
let out = self.buffer.as_ref().bytes().collect::<Vec<u8>>();
|
||||
let mut handle = OpenOptions::new()
|
||||
.create(true)
|
||||
.truncate(true)
|
||||
.write(true)
|
||||
.open(file)?;
|
||||
|
||||
handle.write_all(out.as_slice())?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn write_command(&mut self, command: &str, args: &[&str]) -> std::result::Result<(), String> {
|
||||
let handle = match self.file.clone() {
|
||||
Some(handle) => handle,
|
||||
None => match args.get(0) {
|
||||
Some(part) => {
|
||||
let file = OsString::from(part);
|
||||
self.file = Some(file.clone());
|
||||
file
|
||||
}
|
||||
None => {
|
||||
return Err(format!("{}: No file name.", command));
|
||||
}
|
||||
},
|
||||
};
|
||||
|
||||
self.write_buffer(handle).map_err(|err| format!("{}", err))
|
||||
}
|
||||
|
||||
fn execute_keybind(&mut self, keybind: Keybind) {
|
||||
match keybind {
|
||||
Keybind::Action(action) => action(self),
|
||||
Keybind::Command(command) => {
|
||||
let _ = self
|
||||
.execute_command(&command)
|
||||
.map_err(|err| self.set_error(err));
|
||||
self.mode = Mode::Normal;
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn execute_command(&mut self, command: &str) -> std::result::Result<(), String> {
|
||||
let command_parts = command.split(' ').collect::<Vec<&str>>();
|
||||
|
||||
let command = match command_parts.get(0) {
|
||||
Some(command) => command,
|
||||
None => return Ok(()),
|
||||
};
|
||||
|
||||
let args = &command_parts[1..];
|
||||
|
||||
match *command {
|
||||
"q!" => self.quit = true,
|
||||
"q" => {
|
||||
if self.last_saved == *self.buffer.as_ref() {
|
||||
self.quit = true;
|
||||
} else {
|
||||
return Err("Buffer is unsaved (add ! to override)".into());
|
||||
}
|
||||
}
|
||||
"w" => return self.write_command(command, args),
|
||||
"wq" => {
|
||||
self.write_command(command, args)?;
|
||||
self.quit = true;
|
||||
}
|
||||
command => match command.parse::<usize>() {
|
||||
Err(_) => return Err(format!("{}: Unrecognized command.", command)),
|
||||
Ok(line) if line >= self.buffer.as_ref().len_lines() => {
|
||||
return Err(format!("Line {} is out-of-bounds", line))
|
||||
}
|
||||
Ok(line) => {
|
||||
self.cursor.line = line;
|
||||
self.scroll_to_cursor();
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn move_cursor(&mut self, direction: Direction) {
|
||||
let wrap = self.config.move_linewrap;
|
||||
self.buffer.move_cursor(&mut self.cursor, direction, wrap);
|
||||
self.scroll_to_cursor();
|
||||
}
|
||||
|
||||
fn scroll_to_cursor(&mut self) {
|
||||
if self.cursor.column < self.scroll.column + 3 {
|
||||
self.scroll.column = self.cursor.column.saturating_sub(3);
|
||||
} else if self.cursor.column + 6 >= self.scroll.column + self.size.0 {
|
||||
self.scroll.column = self.cursor.column.saturating_sub(self.size.0 - 6);
|
||||
}
|
||||
|
||||
if self.cursor.line < self.scroll.line {
|
||||
self.scroll.line = self.cursor.line;
|
||||
} else if self.cursor.line + 3 >= self.scroll.line + self.size.1 {
|
||||
self.scroll.line = self.cursor.line + 3 - self.size.1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn screen_main(stdout: &mut Stdout, mut state: State) -> Result<()> {
|
||||
fn screen_main(stdout: &mut Stdout, mut state: state::State) -> Result<()> {
|
||||
let poll_timeout = std::time::Duration::from_millis(100);
|
||||
while !state.quit {
|
||||
state.draw(stdout)?;
|
||||
|
|
@ -458,7 +104,7 @@ fn main() -> Result<()> {
|
|||
exit(EX_DATAERR);
|
||||
});
|
||||
|
||||
let state = State::from_str(file_name, &text)?;
|
||||
let state = state::State::from_str(file_name, &text)?;
|
||||
|
||||
// begin to enter alternate screen
|
||||
let mut stdout = std::io::stdout();
|
||||
|
|
|
|||
|
|
@ -0,0 +1,417 @@
|
|||
/*
|
||||
* Copyright (c) 2023 Marceline Cramer
|
||||
* SPDX-License-Identifier: AGPL-3.0-or-later
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify it under
|
||||
* the terms of the GNU Affero General Public License as published by the Free
|
||||
* Software Foundation, either version 3 of the License, or (at your option) any
|
||||
* later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||||
* FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
|
||||
* details.
|
||||
*
|
||||
* You should have received a copy of the GNU Affero General Public License
|
||||
* along with this program. If not, see https://www.gnu.org/licenses/.
|
||||
*/
|
||||
|
||||
use std::{ffi::OsString, fs::OpenOptions, io::Write, path::PathBuf, sync::Arc};
|
||||
|
||||
use crossbeam_channel::Sender;
|
||||
use crossterm::{
|
||||
cursor,
|
||||
event::{Event, KeyCode, KeyEvent},
|
||||
terminal, QueueableCommand, Result,
|
||||
};
|
||||
use parking_lot::Mutex;
|
||||
use ropey::Rope;
|
||||
|
||||
use crate::{
|
||||
buffer::Buffer,
|
||||
config::{Config, ThemeWatcher},
|
||||
keybinds::{Key, Keybind},
|
||||
theme::StyleStore,
|
||||
Cursor, Direction,
|
||||
};
|
||||
|
||||
#[derive(Clone, Debug, Default)]
|
||||
pub struct CommandState {
|
||||
pub buf: String,
|
||||
pub cursor: usize,
|
||||
}
|
||||
|
||||
#[derive(Copy, Clone, Debug)]
|
||||
pub struct InsertState {
|
||||
pub append: bool,
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, Default)]
|
||||
pub enum Mode {
|
||||
#[default]
|
||||
Normal,
|
||||
Command(CommandState),
|
||||
Visual,
|
||||
Insert(InsertState),
|
||||
}
|
||||
|
||||
impl Mode {
|
||||
pub fn cursor_style(&self) -> cursor::SetCursorStyle {
|
||||
use cursor::SetCursorStyle as Style;
|
||||
match self {
|
||||
Mode::Normal => Style::SteadyBlock,
|
||||
Mode::Visual => Style::BlinkingBlock,
|
||||
Mode::Insert(_) => Style::BlinkingBar,
|
||||
Mode::Command(_) => Style::SteadyUnderScore,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct State {
|
||||
pub styles: Arc<Mutex<StyleStore>>,
|
||||
pub config: Config,
|
||||
pub buffer: Buffer,
|
||||
pub undo_buffers: Vec<Buffer>,
|
||||
pub redo_buffers: Vec<Buffer>,
|
||||
pub cursor: Cursor,
|
||||
pub file: Option<OsString>,
|
||||
pub mode: Mode,
|
||||
pub submode: Option<Key>,
|
||||
pub last_saved: Rope,
|
||||
pub scroll: Cursor,
|
||||
pub size: (usize, usize),
|
||||
pub quit: bool,
|
||||
pub error: Option<String>,
|
||||
pub theme_tx: Sender<PathBuf>,
|
||||
}
|
||||
|
||||
impl State {
|
||||
pub fn from_str(file_name: Option<OsString>, text: &str) -> Result<Self> {
|
||||
let styles = Arc::new(Mutex::new(StyleStore::default()));
|
||||
let buffer = Buffer::from_str(styles.clone(), text);
|
||||
let last_saved = buffer.as_ref().clone();
|
||||
let (cols, rows) = terminal::size()?;
|
||||
let theme_tx = ThemeWatcher::spawn(styles.clone());
|
||||
|
||||
Ok(Self {
|
||||
styles,
|
||||
config: Default::default(),
|
||||
buffer,
|
||||
undo_buffers: Vec::new(),
|
||||
redo_buffers: Vec::new(),
|
||||
cursor: Cursor::default(),
|
||||
file: file_name,
|
||||
mode: Mode::default(),
|
||||
submode: None,
|
||||
last_saved,
|
||||
scroll: Cursor::default(),
|
||||
size: (cols as usize, rows as usize),
|
||||
quit: false,
|
||||
error: None,
|
||||
theme_tx,
|
||||
})
|
||||
}
|
||||
|
||||
pub fn draw(&mut self, out: &mut impl Write) -> Result<()> {
|
||||
// begin update
|
||||
let (cols, rows) = terminal::size()?;
|
||||
out.queue(terminal::BeginSynchronizedUpdate)?;
|
||||
out.queue(terminal::Clear(terminal::ClearType::All))?;
|
||||
let mut styles = self.styles.lock();
|
||||
|
||||
// draw status line
|
||||
let mut set_cursor_pos = None;
|
||||
let mut show_status_bar = false;
|
||||
|
||||
if let Mode::Command(CommandState { buf, cursor }) = &self.mode {
|
||||
let col = *cursor as u16 + 1;
|
||||
let row = rows - 1;
|
||||
out.queue(cursor::MoveTo(0, row))?;
|
||||
write!(out, ":{}", buf)?;
|
||||
set_cursor_pos = Some((col, row));
|
||||
show_status_bar = true;
|
||||
} else if let Some(error) = self.error.as_ref() {
|
||||
let error_style = styles.get_scope("error");
|
||||
out.queue(cursor::MoveTo(0, rows - 1))?;
|
||||
error_style.print_styled(out, error)?;
|
||||
show_status_bar = true;
|
||||
}
|
||||
|
||||
// done with styles
|
||||
drop(styles);
|
||||
|
||||
// draw buffer
|
||||
let buffer_rows = if show_status_bar { rows - 1 } else { rows };
|
||||
let lr_width = self
|
||||
.buffer
|
||||
.draw(cols, buffer_rows, self.scroll, self.cursor, out)?;
|
||||
|
||||
// draw submode
|
||||
if let Some(submode) = self.submode {
|
||||
out.queue(cursor::MoveTo(cols - 10, rows - 1))?;
|
||||
write!(out, "{:?}", submode)?;
|
||||
}
|
||||
|
||||
// draw cursor
|
||||
let cursor_pos = set_cursor_pos.unwrap_or_else(|| {
|
||||
// calculate cursor position on buffer
|
||||
let cursor = self.buffer.clamped_cursor(self.cursor);
|
||||
let col = cursor.column.saturating_sub(self.scroll.column) as u16;
|
||||
let row = cursor.line.saturating_sub(self.scroll.line) as u16;
|
||||
let col = col + lr_width as u16;
|
||||
(col, row)
|
||||
});
|
||||
|
||||
out.queue(cursor::MoveTo(cursor_pos.0, cursor_pos.1))?;
|
||||
out.queue(self.mode.cursor_style())?;
|
||||
|
||||
// finish update
|
||||
out.queue(terminal::EndSynchronizedUpdate)?;
|
||||
out.flush()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// Sets the current error message.
|
||||
pub fn set_error(&mut self, error: impl ToString) {
|
||||
self.error = Some(error.to_string());
|
||||
}
|
||||
|
||||
pub fn on_event(&mut self, event: Event) {
|
||||
// reset the error from the last event
|
||||
self.error = None;
|
||||
|
||||
match event {
|
||||
Event::Resize(cols, rows) => {
|
||||
self.size = (cols as usize, rows as usize);
|
||||
}
|
||||
Event::Key(KeyEvent { code, .. }) => match &self.mode {
|
||||
Mode::Normal | Mode::Visual => {
|
||||
self.on_key(code);
|
||||
}
|
||||
Mode::Command(state) => self.on_command_key(code, state.clone()),
|
||||
Mode::Insert(_) => {
|
||||
if !self.on_key(code) {
|
||||
if let KeyCode::Char(c) = code {
|
||||
self.buffer.insert_char(self.cursor, c);
|
||||
self.move_cursor(Direction::Right);
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
fn on_command_key(&mut self, code: KeyCode, mut state: CommandState) {
|
||||
match code {
|
||||
KeyCode::Char(c) => {
|
||||
state.buf.insert(state.cursor, c);
|
||||
state.cursor += 1;
|
||||
}
|
||||
KeyCode::Backspace => {
|
||||
if state.cursor > 0 {
|
||||
state.cursor -= 1;
|
||||
state.buf.remove(state.cursor);
|
||||
}
|
||||
}
|
||||
KeyCode::Delete if state.cursor < state.buf.len() => {
|
||||
state.buf.remove(state.cursor);
|
||||
}
|
||||
KeyCode::Left if state.cursor > 0 => {
|
||||
state.cursor -= 1;
|
||||
}
|
||||
KeyCode::Right if state.cursor < state.buf.len() => {
|
||||
state.cursor += 1;
|
||||
}
|
||||
KeyCode::Enter => {
|
||||
// TODO add to command history
|
||||
let _ = self
|
||||
.execute_command(&state.buf)
|
||||
.map_err(|err| self.set_error(err));
|
||||
self.mode = Mode::Normal;
|
||||
return;
|
||||
}
|
||||
KeyCode::Esc => {
|
||||
self.mode = Mode::default();
|
||||
return;
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
|
||||
self.mode = Mode::Command(state);
|
||||
}
|
||||
|
||||
/// Processes a key press event.
|
||||
///
|
||||
/// Returns `true` if the key was handled by a keybind, `false` otherwise.
|
||||
fn on_key(&mut self, key: Key) -> bool {
|
||||
let keybinds = match &self.mode {
|
||||
Mode::Normal => &self.config.keybinds.normal,
|
||||
Mode::Insert(_) => &self.config.keybinds.insert,
|
||||
Mode::Visual => &self.config.keybinds.visual,
|
||||
Mode::Command(_) => return false, // command mode is handled in [on_command_event]
|
||||
};
|
||||
|
||||
if let Some(submode) = self.submode {
|
||||
// if we're currently in a submode, try to run this submode's keybind
|
||||
keybinds
|
||||
.submodes
|
||||
.get(&submode)
|
||||
.and_then(|submode| submode.get(&key))
|
||||
.cloned()
|
||||
.map(|keybind| self.execute_keybind(keybind));
|
||||
// whether or not there is a keybind we exit the submode
|
||||
self.submode = None;
|
||||
} else if keybinds.submodes.contains_key(&key) {
|
||||
// enter a submode if available
|
||||
self.submode = Some(key);
|
||||
} else if let Some(keybind) = keybinds.map.get(&key) {
|
||||
// run the keybind if available
|
||||
self.execute_keybind(keybind.clone());
|
||||
} else {
|
||||
// key is not bound; don't handle
|
||||
return false;
|
||||
}
|
||||
|
||||
true
|
||||
}
|
||||
|
||||
fn write_buffer(&mut self, file: OsString) -> Result<()> {
|
||||
self.last_saved = self.buffer.as_ref().clone();
|
||||
let out = self.buffer.as_ref().bytes().collect::<Vec<u8>>();
|
||||
let mut handle = OpenOptions::new()
|
||||
.create(true)
|
||||
.truncate(true)
|
||||
.write(true)
|
||||
.open(file)?;
|
||||
|
||||
handle.write_all(out.as_slice())?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn write_command(&mut self, command: &str, args: &[&str]) -> std::result::Result<(), String> {
|
||||
let handle = match self.file.clone() {
|
||||
Some(handle) => handle,
|
||||
None => match args.get(0) {
|
||||
Some(part) => {
|
||||
let file = OsString::from(part);
|
||||
self.file = Some(file.clone());
|
||||
file
|
||||
}
|
||||
None => {
|
||||
return Err(format!("{}: No file name.", command));
|
||||
}
|
||||
},
|
||||
};
|
||||
|
||||
self.write_buffer(handle).map_err(|err| format!("{}", err))
|
||||
}
|
||||
|
||||
fn execute_keybind(&mut self, keybind: Keybind) {
|
||||
match keybind {
|
||||
Keybind::Action(action) => action(self),
|
||||
Keybind::Command(command) => {
|
||||
let _ = self
|
||||
.execute_command(&command)
|
||||
.map_err(|err| self.set_error(err));
|
||||
self.mode = Mode::Normal;
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn execute_command(&mut self, command: &str) -> std::result::Result<(), String> {
|
||||
let command_parts = command.split(' ').collect::<Vec<&str>>();
|
||||
|
||||
let command = match command_parts.get(0) {
|
||||
Some(command) => command,
|
||||
None => return Ok(()),
|
||||
};
|
||||
|
||||
let args = &command_parts[1..];
|
||||
|
||||
match *command {
|
||||
"q!" => self.quit = true,
|
||||
"q" => {
|
||||
if self.last_saved == *self.buffer.as_ref() {
|
||||
self.quit = true;
|
||||
} else {
|
||||
return Err("Buffer is unsaved (add ! to override)".into());
|
||||
}
|
||||
}
|
||||
"w" => return self.write_command(command, args),
|
||||
"wq" => {
|
||||
self.write_command(command, args)?;
|
||||
self.quit = true;
|
||||
}
|
||||
command => match command.parse::<usize>() {
|
||||
Err(_) => return Err(format!("{}: Unrecognized command.", command)),
|
||||
Ok(line) if line >= self.buffer.as_ref().len_lines() => {
|
||||
return Err(format!("Line {} is out-of-bounds", line))
|
||||
}
|
||||
Ok(line) => {
|
||||
self.cursor.line = line;
|
||||
self.scroll_to_cursor();
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn move_cursor(&mut self, direction: Direction) {
|
||||
let wrap = self.config.move_linewrap;
|
||||
self.buffer.move_cursor(&mut self.cursor, direction, wrap);
|
||||
self.scroll_to_cursor();
|
||||
}
|
||||
|
||||
pub fn scroll_to_cursor(&mut self) {
|
||||
if self.cursor.column < self.scroll.column + 3 {
|
||||
self.scroll.column = self.cursor.column.saturating_sub(3);
|
||||
} else if self.cursor.column + 6 >= self.scroll.column + self.size.0 {
|
||||
self.scroll.column = self.cursor.column.saturating_sub(self.size.0 - 6);
|
||||
}
|
||||
|
||||
if self.cursor.line < self.scroll.line {
|
||||
self.scroll.line = self.cursor.line;
|
||||
} else if self.cursor.line + 3 >= self.scroll.line + self.size.1 {
|
||||
self.scroll.line = self.cursor.line + 3 - self.size.1;
|
||||
}
|
||||
}
|
||||
|
||||
/// If modified, saves the current buffer in undo history and clears the redo history.
|
||||
pub fn save_buffer(&mut self) {
|
||||
/*if let Some(last) = self.undo_buffers.last() {
|
||||
if *last.as_ref() == *self.buffer.as_ref() {
|
||||
return;
|
||||
}
|
||||
}*/
|
||||
|
||||
let current = self.buffer.clone();
|
||||
self.undo_buffers.push(current);
|
||||
self.redo_buffers.clear();
|
||||
}
|
||||
|
||||
/// Pops the last undo state from the history and pushes the current state to the redo buffers.
|
||||
pub fn undo(&mut self) {
|
||||
match self.undo_buffers.pop() {
|
||||
None => self.set_error("Already at oldest change"),
|
||||
Some(last) => {
|
||||
let current = std::mem::replace(&mut self.buffer, last);
|
||||
self.redo_buffers.push(current);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Pops the next redo state from the history and pushes the current state to the undo buffers.
|
||||
pub fn redo(&mut self) {
|
||||
match self.redo_buffers.pop() {
|
||||
None => self.set_error("Already at newest change"),
|
||||
Some(next) => {
|
||||
let current = std::mem::replace(&mut self.buffer, next);
|
||||
self.undo_buffers.push(current);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue