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use crate::config::Config;
use crate::segment::Segment;
use ansi_term::Style;
use ansi_term::{ANSIString, ANSIStrings};
use std::fmt;
/// A module is a collection of segments showing data for a single integration
/// (e.g. The git module shows the current git branch and status)
pub struct Module<'a> {
/// The module's configuration map if available
config: Option<&'a toml::value::Table>,
/// The module's name, to be used in configuration and logging.
name: String,
/// The styling to be inherited by all segments contained within this module.
style: Style,
/// The prefix used to separate the current module from the previous one.
prefix: Affix,
/// The collection of segments that compose this module.
segments: Vec<Segment>,
/// The suffix used to separate the current module from the next one.
suffix: Affix,
}
impl<'a> Module<'a> {
/// Creates a module with no segments.
pub fn new(name: &str, config: Option<&'a toml::value::Table>) -> Module<'a> {
Module {
config,
name: name.to_string(),
style: Style::default(),
prefix: Affix::default_prefix(name),
segments: Vec::new(),
suffix: Affix::default_suffix(name),
}
}
/// Get a reference to a newly created segment in the module
pub fn new_segment(&mut self, name: &str, value: &str) -> &mut Segment {
let mut segment = Segment::new(name);
segment.set_style(self.style);
// Use the provided value unless overwritten by config
segment.set_value(self.config_value_str(name).unwrap_or(value));
self.segments.push(segment);
self.segments.last_mut().unwrap()
}
/// Whether a module has any segments
pub fn is_empty(&self) -> bool {
self.segments.is_empty()
}
/// Get the module's prefix
pub fn get_prefix(&mut self) -> &mut Affix {
&mut self.prefix
}
/// Get the module's suffix
pub fn get_suffix(&mut self) -> &mut Affix {
&mut self.suffix
}
/// Sets the style of the segment.
///
/// Accepts either `Color` or `Style`.
pub fn set_style<T>(&mut self, style: T) -> &mut Module<'a>
where
T: Into<Style>,
{
self.style = style.into();
self
}
/// Returns a vector of colored ANSIString elements to be later used with
/// `ANSIStrings()` to optimize ANSI codes
pub fn ansi_strings(&self) -> Vec<ANSIString> {
let shell = std::env::var("STARSHIP_SHELL").unwrap_or_default();
let ansi_strings = self
.segments
.iter()
.map(Segment::ansi_string)
.collect::<Vec<ANSIString>>();
let mut ansi_strings = match shell.as_str() {
"bash" => ansi_strings_modified(ansi_strings, shell),
"zsh" => ansi_strings_modified(ansi_strings, shell),
_ => ansi_strings,
};
ansi_strings.insert(0, self.prefix.ansi_string());
ansi_strings.push(self.suffix.ansi_string());
ansi_strings
}
pub fn to_string_without_prefix(&self) -> String {
ANSIStrings(&self.ansi_strings()[1..]).to_string()
}
/// Get a module's config value as a string
pub fn config_value_str(&self, key: &str) -> Option<&str> {
self.config.and_then(|config| config.get_as_str(key))
}
/// Get a module's config value as an int
pub fn config_value_i64(&self, key: &str) -> Option<i64> {
self.config.and_then(|config| config.get_as_i64(key))
}
/// Get a module's config value as a bool
pub fn config_value_bool(&self, key: &str) -> Option<bool> {
self.config.and_then(|config| config.get_as_bool(key))
}
}
impl<'a> fmt::Display for Module<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let ansi_strings = self.ansi_strings();
write!(f, "{}", ANSIStrings(&ansi_strings))
}
}
/// Many shells cannot deal with raw unprintable characters (like ANSI escape sequences) and
/// miscompute the cursor position as a result, leading to strange visual bugs. Here, we wrap these
/// characters in shell-specific escape codes to indicate to the shell that they are zero-length.
fn ansi_strings_modified(ansi_strings: Vec<ANSIString>, shell: String) -> Vec<ANSIString> {
const ESCAPE_BEGIN: char = '\u{1b}';
const MAYBE_ESCAPE_END: char = 'm';
ansi_strings
.iter()
.map(|ansi| {
let mut escaped = false;
let final_string: String = ansi
.to_string()
.chars()
.map(|x| match x {
ESCAPE_BEGIN => {
escaped = true;
match shell.as_str() {
"bash" => String::from("\u{5c}\u{5b}\u{1b}"), // => \[ESC
"zsh" => String::from("\u{25}\u{7b}\u{1b}"), // => %{ESC
_ => x.to_string(),
}
}
MAYBE_ESCAPE_END => {
if escaped {
escaped = false;
match shell.as_str() {
"bash" => String::from("m\u{5c}\u{5d}"), // => m\]
"zsh" => String::from("m\u{25}\u{7d}"), // => m%}
_ => x.to_string(),
}
} else {
x.to_string()
}
}
_ => x.to_string(),
})
.collect();
ANSIString::from(final_string)
})
.collect::<Vec<ANSIString>>()
}
/// Module affixes are to be used for the prefix or suffix of a module.
pub struct Affix {
/// The affix's name, to be used in configuration and logging.
name: String,
/// The affix's style.
style: Style,
/// The string value of the affix.
value: String,
}
impl Affix {
pub fn default_prefix(name: &str) -> Self {
Self {
name: format!("{}_prefix", name),
style: Style::default(),
value: "via ".to_string(),
}
}
pub fn default_suffix(name: &str) -> Self {
Self {
name: format!("{}_suffix", name),
style: Style::default(),
value: " ".to_string(),
}
}
/// Sets the style of the module.
///
/// Accepts either `Color` or `Style`.
pub fn set_style<T>(&mut self, style: T) -> &mut Self
where
T: Into<Style>,
{
self.style = style.into();
self
}
/// Sets the value of the module.
pub fn set_value<T>(&mut self, value: T) -> &mut Self
where
T: Into<String>,
{
self.value = value.into();
self
}
/// Generates the colored ANSIString output.
pub fn ansi_string(&self) -> ANSIString {
self.style.paint(&self.value)
}
}
impl fmt::Display for Affix {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.ansi_string())
}
}
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