bendns' repos / pattypan
small software-rendered rust tty
Diffstat (limited to 'src/term/cells.rs')
-rw-r--r--src/term/cells.rs20
1 files changed, 16 insertions, 4 deletions
diff --git a/src/term/cells.rs b/src/term/cells.rs
index 66b163c..99a887f 100644
--- a/src/term/cells.rs
+++ b/src/term/cells.rs
@@ -11,7 +11,7 @@ pub struct Style {
pub flags: u8,
}
use std::default::Default::default;
-use std::iter::{repeat, repeat_n};
+use std::iter::{empty, repeat, repeat_n};
use crate::colors;
impl std::default::Default for Style {
@@ -57,10 +57,14 @@ impl Cells {
self.size.0
}
#[track_caller]
+ fn at(&mut self, (x, y): (u16, u16)) -> usize {
+ self.offset() + ((y - 1) * self.c() + x - 1) as usize
+ }
+ #[track_caller]
pub fn get_at(&mut self, (x, y): (u16, u16)) -> &mut Cell {
- let w = self.c();
assert!(x < self.c() && y < self.r(), "out of bounds");
- &mut self.cells()[((y - 1) * w + x - 1) as usize]
+ let i = self.at((x, y));
+ &mut self.cells[i]
}
pub fn rows(&mut self) -> impl Iterator<Item = &mut [Cell]> {
let w = self.c();
@@ -72,7 +76,7 @@ impl Cells {
[(row as usize - 1) * w as usize..row as usize * w as usize]
}
pub fn past(&mut self, (x, row): (u16, u16)) -> &mut [Cell] {
- &mut self.rows().nth(row as usize - 1).unwrap()[x as usize..]
+ &mut self.rows().nth(row as usize - 1).unwrap()[x as usize - 1..]
}
pub fn grow(&mut self, by: u16) {
self.row += by;
@@ -82,6 +86,14 @@ impl Cells {
));
}
+ pub fn insert_chars(&mut self, characters: u16, (x, y): (u16, u16)) {
+ let s = &mut self.row(y)[x as usize - 1..];
+ s.rotate_right(characters as usize);
+ s[..characters as usize].fill(Cell::default());
+ let w = self.c();
+ self.row(y)[w as usize - characters as usize..]
+ .fill(Cell::default());
+ }
pub fn insert_lines(&mut self, lines: u16, below: u16) {
let c = self.c();
let o = self.offset();