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use crate::docs::vcd2svg::symbols;
#[derive(Debug, Clone, Default)]
pub struct TextFrame {
buffers: Vec<Vec<char>>,
columns: usize,
}
impl TextFrame {
pub fn new(columns: usize) -> Self {
Self {
buffers: vec![],
columns,
}
}
pub fn row(&mut self, row: usize) -> &mut [char] {
if row < self.buffers.len() {
&mut self.buffers[row]
} else {
while self.buffers.len() <= row {
self.buffers.push(vec![' '; self.columns])
}
&mut self.buffers[row]
}
}
pub fn write(&mut self, row: usize, col: usize, msg: &str) {
for (ndx, char) in msg.chars().enumerate() {
if ndx + col < self.columns {
self.row(row)[ndx + col] = char;
}
}
}
pub fn put(&mut self, row: usize, col: usize, x: char) {
if col < self.columns {
self.row(row)[col] = x;
}
}
}
impl ToString for TextFrame {
fn to_string(&self) -> String {
self.buffers
.iter()
.map(|x| x.iter().collect::<String>())
.collect::<Vec<_>>()
.join("\n")
}
}
#[test]
fn test_frame_draw_stuff() {
let mut x = TextFrame::new(16);
x.write(0, 0, "hello world!");
assert_eq!(x.to_string(), "hello world! ");
x.write(1, 0, "foo!");
assert_eq!(x.to_string(), "hello world! \nfoo! ");
x.put(1, 1, symbols::HORIZONTAL);
assert_eq!(x.to_string(), "hello world! \nf─o! ");
}