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|
use std::ffi::OsStr;
use std::fs;
use std::path::Path;
use once_cell::unsync::OnceCell;
use syntect::highlighting::Theme;
use syntect::parsing::{SyntaxReference, SyntaxSet};
use path_abs::PathAbs;
use crate::error::*;
use crate::input::{InputReader, OpenedInput};
use crate::syntax_mapping::ignored_suffixes::IgnoredSuffixes;
use crate::syntax_mapping::MappingTarget;
use crate::{bat_warning, SyntaxMapping};
use lazy_theme_set::LazyThemeSet;
use serialized_syntax_set::*;
#[cfg(feature = "build-assets")]
pub use crate::assets::build_assets::*;
pub(crate) mod assets_metadata;
#[cfg(feature = "build-assets")]
mod build_assets;
mod lazy_theme_set;
mod serialized_syntax_set;
#[derive(Debug)]
pub struct HighlightingAssets {
syntax_set_cell: OnceCell<SyntaxSet>,
serialized_syntax_set: SerializedSyntaxSet,
theme_set: LazyThemeSet,
fallback_theme: Option<&'static str>,
}
#[derive(Debug)]
pub struct SyntaxReferenceInSet<'a> {
pub syntax: &'a SyntaxReference,
pub syntax_set: &'a SyntaxSet,
}
/// Lazy-loaded syntaxes are already compressed, and we don't want to compress
/// already compressed data.
pub(crate) const COMPRESS_SYNTAXES: bool = false;
/// We don't want to compress our [LazyThemeSet] since the lazy-loaded themes
/// within it are already compressed, and compressing another time just makes
/// performance suffer
pub(crate) const COMPRESS_THEMES: bool = false;
/// Compress for size of ~40 kB instead of ~200 kB without much difference in
/// performance due to lazy-loading
pub(crate) const COMPRESS_LAZY_THEMES: bool = true;
/// Compress for size of ~10 kB instead of ~120 kB
pub(crate) const COMPRESS_ACKNOWLEDGEMENTS: bool = true;
impl HighlightingAssets {
fn new(serialized_syntax_set: SerializedSyntaxSet, theme_set: LazyThemeSet) -> Self {
HighlightingAssets {
syntax_set_cell: OnceCell::new(),
serialized_syntax_set,
theme_set,
fallback_theme: None,
}
}
/// The default theme.
///
/// ### Windows and Linux
///
/// Windows and most Linux distributions has a dark terminal theme by
/// default. On these platforms, this function always returns a theme that
/// looks good on a dark background.
///
/// ### macOS
///
/// On macOS the default terminal background is light, but it is common that
/// Dark Mode is active, which makes the terminal background dark. On this
/// platform, the default theme depends on
/// ```bash
/// defaults read -globalDomain AppleInterfaceStyle
/// ```
/// To avoid the overhead of the check on macOS, simply specify a theme
/// explicitly via `--theme`, `BAT_THEME`, or `~/.config/bat`.
///
/// See <https://github.com/sharkdp/bat/issues/1746> and
/// <https://github.com/sharkdp/bat/issues/1928> for more context.
pub fn default_theme() -> &'static str {
#[cfg(not(target_os = "macos"))]
{
Self::default_dark_theme()
}
#[cfg(target_os = "macos")]
{
if macos_dark_mode_active() {
Self::default_dark_theme()
} else {
Self::default_light_theme()
}
}
}
/**
* The default theme that looks good on a dark background.
*/
fn default_dark_theme() -> &'static str {
"Monokai Extended"
}
/**
* The default theme that looks good on a light background.
*/
#[cfg(target_os = "macos")]
fn default_light_theme() -> &'static str {
"Monokai Extended Light"
}
pub fn from_cache(cache_path: &Path) -> Result<Self> {
Ok(HighlightingAssets::new(
SerializedSyntaxSet::FromFile(cache_path.join("syntaxes.bin")),
asset_from_cache(&cache_path.join("themes.bin"), "theme set", COMPRESS_THEMES)?,
))
}
pub fn from_binary() -> Self {
HighlightingAssets::new(
SerializedSyntaxSet::FromBinary(get_serialized_integrated_syntaxset()),
get_integrated_themeset(),
)
}
pub fn set_fallback_theme(&mut self, theme: &'static str) {
self.fallback_theme = Some(theme);
}
/// Return the collection of syntect syntax definitions.
pub fn get_syntax_set(&self) -> Result<&SyntaxSet> {
self.syntax_set_cell
.get_or_try_init(|| self.serialized_syntax_set.deserialize())
}
/// Use [Self::get_syntaxes] instead
#[deprecated]
pub fn syntaxes(&self) -> &[SyntaxReference] {
self.get_syntax_set()
.expect(".syntaxes() is deprecated, use .get_syntaxes() instead")
.syntaxes()
}
pub fn get_syntaxes(&self) -> Result<&[SyntaxReference]> {
Ok(self.get_syntax_set()?.syntaxes())
}
fn get_theme_set(&self) -> &LazyThemeSet {
&self.theme_set
}
pub fn themes(&self) -> impl Iterator<Item = &str> {
self.get_theme_set().themes()
}
/// Use [Self::get_syntax_for_path] instead
#[deprecated]
pub fn syntax_for_file_name(
&self,
file_name: impl AsRef<Path>,
mapping: &SyntaxMapping,
) -> Option<&SyntaxReference> {
self.get_syntax_for_path(file_name, mapping)
.ok()
.map(|syntax_in_set| syntax_in_set.syntax)
}
/// Detect the syntax based on, in order:
/// 1. Syntax mappings with [MappingTarget::MapTo] and [MappingTarget::MapToUnknown]
/// (e.g. `/etc/profile` -> `Bourne Again Shell (bash)`)
/// 2. The file name (e.g. `Dockerfile`)
/// 3. Syntax mappings with [MappingTarget::MapExtensionToUnknown]
/// (e.g. `*.conf`)
/// 4. The file name extension (e.g. `.rs`)
///
/// When detecting syntax based on syntax mappings, the full path is taken
/// into account. When detecting syntax based on file name, no regard is
/// taken to the path of the file. Only the file name itself matters. When
/// detecting syntax based on file name extension, only the file name
/// extension itself matters.
///
/// Returns [Error::UndetectedSyntax] if it was not possible detect syntax
/// based on path/file name/extension (or if the path was mapped to
/// [MappingTarget::MapToUnknown] or [MappingTarget::MapExtensionToUnknown]).
/// In this case it is appropriate to fall back to other methods to detect
/// syntax. Such as using the contents of the first line of the file.
///
/// Returns [Error::UnknownSyntax] if a syntax mapping exist, but the mapped
/// syntax does not exist.
pub fn get_syntax_for_path(
&self,
path: impl AsRef<Path>,
mapping: &SyntaxMapping,
) -> Result<SyntaxReferenceInSet> {
let path = path.as_ref();
let syntax_match = mapping.get_syntax_for(path);
if let Some(MappingTarget::MapToUnknown) = syntax_match {
return Err(Error::UndetectedSyntax(path.to_string_lossy().into()));
}
if let Some(MappingTarget::MapTo(syntax_name)) = syntax_match {
return self
.find_syntax_by_name(syntax_name)?
.ok_or_else(|| Error::UnknownSyntax(syntax_name.to_owned()));
}
let file_name = path.file_name().unwrap_or_default();
match (
self.get_syntax_for_file_name(file_name, &mapping.ignored_suffixes)?,
syntax_match,
) {
(Some(syntax), _) => Ok(syntax),
(_, Some(MappingTarget::MapExtensionToUnknown)) => {
Err(Error::UndetectedSyntax(path.to_string_lossy().into()))
|