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//! This module provides a harness for non-trivial displays of information to `stdout`.
use libgfold::Status;
use std::io;
use std::io::Write;
use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
use crate::config::ColorMode;
/// This harness provides methods to write to `stdout`. It maps the internal [`ColorMode`] type to
/// our dependency's [`ColorChoice`] type due to discrepancies in behavior and naming.
pub struct ColorHarness {
color_choice: ColorChoice,
}
impl ColorHarness {
pub fn new(color_mode: &ColorMode) -> Self {
Self {
color_choice: match &color_mode {
ColorMode::Always => ColorChoice::Always,
ColorMode::Compatibility => ColorChoice::Auto,
ColorMode::Never => ColorChoice::Never,
},
}
}
/// Writes the [`Status`] of the Git repository to `stdout`.
pub fn write_status(&self, status: &Status, status_width: usize) -> io::Result<()> {
let mut stdout = StandardStream::stdout(self.color_choice);
stdout.set_color(ColorSpec::new().set_fg(Some(match status {
Status::Bare | Status::Unknown => Color::Red,
Status::Clean => Color::Green,
Status::Unpushed => Color::Blue,
Status::Unclean => Color::Yellow,
})))?;
write!(
&mut stdout,
"{:<status_width$}",
status.as_str(),
status_width = status_width,
)?;
stdout.reset()
}
/// Writes the input [`&str`] to `stdout` in bold.
pub fn write_bold(&self, input: &str, newline: bool) -> io::Result<()> {
self.write_color(input, newline, ColorSpec::new().set_bold(true))
}
/// Writes the input [`&str`] to `stdout` in gray (or cyan if in compatibility mode).
pub fn write_gray(&self, input: &str, newline: bool) -> io::Result<()> {
// FIXME(nick): check why Color::Rg(128, 128, 128) breaks in tmux on macOS Terminal.app.
self.write_color(
input,
newline,
ColorSpec::new().set_fg(Some(match &self.color_choice {
ColorChoice::Auto => Color::Cyan,
_ => Color::Ansi256(242),
})),
)
}
fn write_color(
&self,
input: &str,
newline: bool,
color_spec: &mut ColorSpec,
) -> io::Result<()> {
let mut stdout = StandardStream::stdout(self.color_choice);
stdout.set_color(color_spec)?;
match newline {
true => writeln!(&mut stdout, "{input}")?,
false => write!(&mut stdout, "{input}")?,
}
stdout.reset()
}
}
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