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|
use ansi_term::ANSIStrings;
use clap::ArgMatches;
use rayon::prelude::*;
use std::collections::BTreeSet;
use std::fmt::{self, Debug, Write as FmtWrite};
use std::io::{self, Write};
use std::time::Duration;
use terminal_size::terminal_size;
use unicode_segmentation::UnicodeSegmentation;
use unicode_width::UnicodeWidthChar;
use crate::configs::PROMPT_ORDER;
use crate::context::{Context, Shell};
use crate::formatter::{StringFormatter, VariableHolder};
use crate::module::Module;
use crate::module::ALL_MODULES;
use crate::modules;
use crate::segment::Segment;
pub struct Grapheme<'a>(pub &'a str);
impl<'a> Grapheme<'a> {
pub fn width(&self) -> usize {
self.0
.chars()
.filter_map(UnicodeWidthChar::width)
.max()
.unwrap_or(0)
}
}
pub trait UnicodeWidthGraphemes {
fn width_graphemes(&self) -> usize;
}
impl<T> UnicodeWidthGraphemes for T
where
T: AsRef<str>,
{
fn width_graphemes(&self) -> usize {
self.as_ref()
.graphemes(true)
.map(Grapheme)
.map(|g| g.width())
.sum()
}
}
#[test]
fn test_grapheme_aware_width() {
// UnicodeWidthStr::width would return 8
assert_eq!(2, "👩👩👦👦".width_graphemes());
assert_eq!(1, "Ü".width_graphemes());
assert_eq!(11, "normal text".width_graphemes());
}
pub fn prompt(args: ArgMatches) {
let context = Context::new(args);
let stdout = io::stdout();
let mut handle = stdout.lock();
write!(handle, "{}", get_prompt(context)).unwrap();
}
pub fn get_prompt(context: Context) -> String {
let config = &context.root_config;
let mut buf = String::new();
match std::env::var_os("TERM") {
Some(term) if term == "dumb" => {
log::error!("Under a 'dumb' terminal (TERM=dumb).");
buf.push_str("Starship disabled due to TERM=dumb > ");
return buf;
}
_ => {}
}
// A workaround for a fish bug (see #739,#279). Applying it to all shells
// breaks things (see #808,#824,#834). Should only be printed in fish.
if let Shell::Fish = context.shell {
buf.push_str("\x1b[J"); // An ASCII control code to clear screen
}
let (formatter, modules) = load_formatter_and_modules(&context);
let formatter = formatter.map_variables_to_segments(|module| {
// Make $all display all modules not explicitly referenced
if module == "all" {
Some(Ok(all_modules_uniq(&modules)
.par_iter()
.flat_map(|module| {
handle_module(module, &context, &modules)
.into_iter()
.flat_map(|module| module.segments)
.collect::<Vec<Segment>>()
})
.collect::<Vec<_>>()))
} else if context.is_module_disabled_in_config(module) {
None
} else {
// Get segments from module
Some(Ok(handle_module(module, &context, &modules)
.into_iter()
.flat_map(|module| module.segments)
.collect::<Vec<Segment>>()))
}
});
// Creates a root module and prints it.
let mut root_module = Module::new("Starship Root", "The root module", None);
root_module.set_segments(
formatter
.parse(None, Some(&context))
.expect("Unexpected error returned in root format variables"),
);
let module_strings = root_module.ansi_strings_for_shell(context.shell, Some(context.width));
if config.add_newline && !context.continuation {
// continuation prompts normally do not include newlines, but they can
writeln!(buf).unwrap();
}
write!(buf, "{}", ANSIStrings(&module_strings)).unwrap();
if context.right {
// right prompts generally do not allow newlines
buf = buf.replace('\n', "");
}
// escape \n and ! characters for tcsh
if let Shell::Tcsh = context.shell {
buf = buf.replace('!', "\\!");
// space is required before newline
buf = buf.replace('\n', " \\n");
}
buf
}
pub fn module(module_name: &str, args: ArgMatches) {
let context = Context::new(args);
let module = get_module(module_name, context).unwrap_or_default();
print!("{}", module);
}
pub fn get_module(module_name: &str, context: Context) -> Option<String> {
modules::handle(module_name, &context).map(|m| m.to_string())
}
pub fn timings(args: ArgMatches) {
let context = Context::new(args);
struct ModuleTiming {
name: String,
name_len: usize,
value: String,
duration: Duration,
duration_len: usize,
}
let mut modules = compute_modules(&context)
.iter()
.filter(|module| !module.is_empty() || module.duration.as_millis() > 0)
.map(|module| ModuleTiming {
name: String::from(module.get_name().as_str()),
name_len: module.get_name().width_graphemes(),
value: ansi_term::ANSIStrings(&module.ansi_strings())
.to_string()
.replace('\n', "\\n"),
duration: module.duration,
duration_len: format_duration(&module.duration).width_graphemes(),
})
.collect::<Vec<ModuleTiming>>();
modules.sort_by(|a, b| b.duration.cmp(&a.duration));
let max_name_width = modules.iter().map(|i| i.name_len).max().unwrap_or(0);
let max_duration_width = modules.iter().map(|i| i.duration_len).max().unwrap_or(0);
println!("\n Here are the timings of modules in your prompt (>=1ms or output):");
// for now we do not expect a wrap around at the end... famous last words
// Overall a line looks like this: " {module name} - {duration} - "{module value}"".
for timing in &modules {
println!(
" {}{} - {}{} - \"{}\"",
timing.name,
" ".repeat(max_name_width - (timing.name_len)),
" ".repeat(max_duration_width - (timing.duration_len)),
format_duration(&timing.duration),
timing.value
);
}
}
pub fn explain(args: ArgMatches) {
let context = Context::new(args);
struct ModuleInfo {
value: String,
value_len: usize,
desc: String,
duration: String,
}
static DONT_PRINT: &[&str] = &["line_break"];
let modules = compute_modules(&context)
.into_iter()
.filter(|module| !DONT_PRINT.contains(<
|