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use ansi_term::ANSIStrings;
use clap::ArgMatches;
use rayon::prelude::*;
use std::fmt::Write as FmtWrite;
use std::io::{self, Write};
use unicode_width::UnicodeWidthChar;
use crate::context::{Context, Shell};
use crate::module::Module;
use crate::module::ALL_MODULES;
use crate::modules;
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.config.get_root_config();
let mut buf = String::new();
// Write a new line before the prompt
if config.add_newline {
writeln!(buf).unwrap();
}
// 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 modules = compute_modules(&context);
let mut print_without_prefix = true;
let printable = modules.iter();
for module in printable {
// Skip printing the prefix of a module after the line_break
if print_without_prefix {
let module_without_prefix = module.to_string_without_prefix(context.shell.clone());
write!(buf, "{}", module_without_prefix).unwrap()
} else {
let module = module.ansi_strings_for_shell(context.shell.clone());
write!(buf, "{}", ANSIStrings(&module)).unwrap();
}
print_without_prefix = module.get_name() == "line_break"
}
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 explain(args: ArgMatches) {
let context = Context::new(args);
struct ModuleInfo {
value: String,
value_len: usize,
desc: String,
}
let dont_print = vec!["line_break", "character"];
let modules = compute_modules(&context)
.into_iter()
.filter(|module| !dont_print.contains(&module.get_name().as_str()))
.map(|module| {
let ansi_strings = module.ansi_strings();
let value = module.get_segments().join("");
ModuleInfo {
value: ansi_term::ANSIStrings(&ansi_strings[1..ansi_strings.len() - 1]).to_string(),
value_len: value.chars().count() + count_wide_chars(&value),
desc: module.get_description().to_owned(),
}
})
.collect::<Vec<ModuleInfo>>();
let mut max_ansi_module_width = 0;
let mut max_module_width = 0;
for info in &modules {
max_ansi_module_width = std::cmp::max(
max_ansi_module_width,
info.value.chars().count() + count_wide_chars(&info.value),
);
max_module_width = std::cmp::max(max_module_width, info.value_len);
}
let desc_width = term_size::dimensions()
.map(|(w, _)| w)
.map(|width| width - std::cmp::min(width, max_ansi_module_width));
println!("\n Here's a breakdown of your prompt:");
for info in modules {
let wide_chars = count_wide_chars(&info.value);
if let Some(desc_width) = desc_width {
let wrapped = textwrap::fill(&info.desc, desc_width);
let mut lines = wrapped.split('\n');
println!(
" {:width$} - {}",
info.value,
lines.next().unwrap(),
width = max_ansi_module_width - wide_chars
);
for line in lines {
println!("{}{}", " ".repeat(max_module_width + 6), line.trim());
}
} else {
println!(
" {:width$} - {}",
info.value,
info.desc,
width = max_ansi_module_width - wide_chars
);
};
}
}
fn compute_modules<'a>(context: &'a Context) -> Vec<Module<'a>> {
let mut prompt_order: Vec<&str> = Vec::new();
// Write out a custom prompt order
for module in context.config.get_root_config().prompt_order {
if ALL_MODULES.contains(&module) {
prompt_order.push(module);
} else {
log::debug!(
"Expected prompt_order to contain value from {:?}. Instead received {}",
ALL_MODULES,
module,
);
}
}
prompt_order
.par_iter()
.filter(|module| !context.is_module_disabled_in_config(module))
.map(|module| modules::handle(module, &context)) // Compute modules
.flatten() // Remove segments set to `None`
.collect::<Vec<Module<'a>>>()
}
fn count_wide_chars(value: &str) -> usize {
value.chars().filter(|c| c.width().unwrap_or(0) > 1).count()
}
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