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use std::io::{self, Write};
use itertools::Itertools;
use crate::options::theme::is_light_syntax_theme;
use crate::utils::bat::assets::HighlightingAssets;
#[cfg(not(tarpaulin_include))]
pub fn list_syntax_themes() -> std::io::Result<()> {
let stdout = io::stdout();
let mut stdout = stdout.lock();
if atty::is(atty::Stream::Stdout) {
_list_syntax_themes_for_humans(&mut stdout)
} else {
_list_syntax_themes_for_machines(&mut stdout)
}
}
pub fn _list_syntax_themes_for_humans(writer: &mut dyn Write) -> std::io::Result<()> {
let assets = HighlightingAssets::new();
let themes = &assets.theme_set.themes;
writeln!(writer, "Light syntax themes:")?;
for (theme, _) in themes.iter().filter(|(t, _)| is_light_syntax_theme(*t)) {
writeln!(writer, " {}", theme)?;
}
writeln!(writer, "\nDark syntax themes:")?;
for (theme, _) in themes.iter().filter(|(t, _)| !is_light_syntax_theme(*t)) {
writeln!(writer, " {}", theme)?;
}
writeln!(
writer,
"\nUse delta --show-syntax-themes to demo the themes."
)?;
Ok(())
}
pub fn _list_syntax_themes_for_machines(writer: &mut dyn Write) -> std::io::Result<()> {
let assets = HighlightingAssets::new();
let themes = &assets.theme_set.themes;
for (theme, _) in themes
.iter()
.sorted_by_key(|(t, _)| is_light_syntax_theme(*t))
{
writeln!(
writer,
"{}\t{}",
if is_light_syntax_theme(theme) {
"light"
} else {
"dark"
},
theme
)?;
}
Ok(())
}
#[cfg(test)]
mod tests {
use std::io::{Cursor, Read, Seek, SeekFrom};
use super::*;
#[test]
fn test_list_syntax_themes_for_humans() {
let mut writer = Cursor::new(vec![0; 512]);
_list_syntax_themes_for_humans(&mut writer).unwrap();
let mut s = String::new();
writer.seek(SeekFrom::Start(0)).unwrap();
writer.read_to_string(&mut s).unwrap();
assert!(s.contains("Light syntax themes:\n"));
assert!(s.contains(" GitHub\n"));
assert!(s.contains("Dark syntax themes:\n"));
assert!(s.contains(" Dracula\n"));
}
#[test]
fn test_list_syntax_themes_for_machines() {
let mut writer = Cursor::new(vec![0; 512]);
_list_syntax_themes_for_machines(&mut writer).unwrap();
let mut s = String::new();
writer.seek(SeekFrom::Start(0)).unwrap();
writer.read_to_string(&mut s).unwrap();
assert!(s.contains("light GitHub\n"));
assert!(s.contains("dark Dracula\n"));
}
}
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