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|
mod buf;
use std::io::{self, Write};
use crate::cursor::{self, Direction};
pub use buf::LineBuf;
pub struct Line {
buf: LineBuf,
dirty: bool,
}
impl std::ops::Deref for Line {
type Target = LineBuf;
fn deref(&self) -> &Self::Target {
&self.buf
}
}
impl Line {
pub fn new() -> Self {
Self {
buf: LineBuf::new(),
dirty: false,
}
}
pub fn mark_clean(&mut self) {
self.dirty = false;
}
pub fn mark_dirty(&mut self) {
self.dirty = true;
}
pub fn is_dirty(&self) -> bool {
self.dirty
}
pub fn had_contents(&self) -> bool {
self.buf.is_dirty()
}
pub fn is_empty(&self) -> bool {
self.buf.is_empty()
}
pub fn cursor_left(&mut self) -> io::Result<()> {
if self.buf.left() {
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(Direction::Left, 1, &mut stdout)?;
stdout.flush()?;
}
Ok(())
}
pub fn cursor_right(&mut self) -> io::Result<()> {
if self.buf.right() {
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(Direction::Right, 1, &mut stdout)?;
stdout.flush()?;
}
Ok(())
}
pub fn move_to_begin(&mut self) -> io::Result<()> {
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(Direction::Left, self.buf.all_left(), &mut stdout)?;
stdout.flush()
}
pub fn move_to_end(&mut self) -> io::Result<()> {
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(Direction::Right, self.buf.all_right(), &mut stdout)?;
stdout.flush()
}
// move to next
pub fn cursor_left_word(&mut self) -> io::Result<()> {
let mut i = 0;
// find word
while let Some(b' ') = self.buf.get_left() {
self.buf.left();
i += 1;
}
// skip it
while let Some(x) = self.buf.get_left()
&& !x.is_ascii_whitespace()
{
self.buf.left();
i += 1;
}
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(Direction::Left, i, &mut stdout)?;
stdout.flush()
}
pub fn cursor_right_word(&mut self) -> io::Result<()> {
let mut i = 0;
// find word
while let Some(b' ') = self.buf.get_right() {
self.buf.right();
i += 1;
}
// skip it
while let Some(x) = self.buf.get_right()
&& !x.is_ascii_whitespace()
{
self.buf.right();
i += 1;
}
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(Direction::Right, i, &mut stdout)?;
stdout.flush()
}
}
macro_rules! mutating_impls {
($(pub fn $fun:ident(&mut $self:ident $($arg:tt)*) -> $ty:ty $body:block )*) => {
impl Line {$(
pub fn $fun(&mut $self $($arg)*) -> $ty {
$self.dirty = true;
$body
}
)*}
};
}
mutating_impls! {
pub fn clear_prompt(&mut self) -> io::Result<()> {
let mut stdout = io::stdout().lock();
cursor::fmove_cursor(
Direction::Right,
self.buf.distance_from_right_end(),
&mut stdout,
)?;
for _ in 0..self.buf.len() {
stdout.write_all(b"\x08 \x08")?;
}
self.buf.clear();
stdout.flush()
}
pub fn type_bytes(&mut self, bs: &[u8]) -> io::Result<()> {
for b in bs.iter() {
self.buf.add(*b);
}
io::stdout().lock().write_all(&bs)?;
self.buf.display_post(b"");
Ok(())
}
pub fn type_byte(&mut self, b: u8) -> io::Result<()> {
self.type_bytes(&[b])
}
pub fn del_left(&mut self) -> io::Result<()> {
if self.buf.del_left().is_some() {
cursor::fmove_cursor(Direction::Left, 1, &mut io::stdout())?;
self.buf.display_post(b" ");
}
Ok(())
}
pub fn del_right(&mut self) -> io::Result<()> {
self.buf.del_right();
self.buf.display_post(b" ");
Ok(())
}
pub fn del_left_word(&mut self) -> io::Result<()> {
let mut del = 0;
while let Some(x) = self.buf.get_left()
&& x == b' '
{
self.buf.del_left();
del += 1;
}
while let Some(x) = self.buf.get_left()
&& x != b' '
{
self.buf.del_left();
del += 1;
}
cursor::fmove_cursor(Direction::Left, del, &mut io::stdout())?;
self.buf.display_post(&vec![b' '; del]);
Ok(())
}
pub fn del_right_word(&mut self) -> io::Result<()> {
let mut del = 0;
while let Some(x) = self.buf.get_right()
&& x == b' '
{
self.buf.del_right();
del += 1;
}
while let Some(x) = self.buf.get_right()
&& x != b' '
{
self.buf.del_right();
del += 1;
}
self.buf.display_post(&vec![b' '; del]);
Ok(())
}
pub fn set_content(&mut self, content: Vec<u8>) -> io::Result<()> {
self.buf.set_content(content);
Ok(())
}
pub fn dump(&mut self) -> Vec<u8> {
self.buf.dump()
}
}
|
