mdBook/src/theme/mod.rs

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#![allow(missing_docs)]
pub mod playground_editor;
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pub mod fonts;
#[cfg(feature = "search")]
pub mod searcher;
use std::fs::File;
use std::io::Read;
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use std::path::Path;
use crate::errors::*;
pub static INDEX: &[u8] = include_bytes!("index.hbs");
pub static HEAD: &[u8] = include_bytes!("head.hbs");
pub static REDIRECT: &[u8] = include_bytes!("redirect.hbs");
pub static HEADER: &[u8] = include_bytes!("header.hbs");
pub static CHROME_CSS: &[u8] = include_bytes!("css/chrome.css");
pub static GENERAL_CSS: &[u8] = include_bytes!("css/general.css");
pub static PRINT_CSS: &[u8] = include_bytes!("css/print.css");
pub static VARIABLES_CSS: &[u8] = include_bytes!("css/variables.css");
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pub static FAVICON_PNG: &[u8] = include_bytes!("favicon.png");
pub static FAVICON_SVG: &[u8] = include_bytes!("favicon.svg");
pub static JS: &[u8] = include_bytes!("book.js");
pub static HIGHLIGHT_JS: &[u8] = include_bytes!("highlight.js");
pub static TOMORROW_NIGHT_CSS: &[u8] = include_bytes!("tomorrow-night.css");
pub static HIGHLIGHT_CSS: &[u8] = include_bytes!("highlight.css");
pub static AYU_HIGHLIGHT_CSS: &[u8] = include_bytes!("ayu-highlight.css");
pub static CLIPBOARD_JS: &[u8] = include_bytes!("clipboard.min.js");
pub static FONT_AWESOME: &[u8] = include_bytes!("FontAwesome/css/font-awesome.min.css");
pub static FONT_AWESOME_EOT: &[u8] = include_bytes!("FontAwesome/fonts/fontawesome-webfont.eot");
pub static FONT_AWESOME_SVG: &[u8] = include_bytes!("FontAwesome/fonts/fontawesome-webfont.svg");
pub static FONT_AWESOME_TTF: &[u8] = include_bytes!("FontAwesome/fonts/fontawesome-webfont.ttf");
pub static FONT_AWESOME_WOFF: &[u8] = include_bytes!("FontAwesome/fonts/fontawesome-webfont.woff");
pub static FONT_AWESOME_WOFF2: &[u8] =
include_bytes!("FontAwesome/fonts/fontawesome-webfont.woff2");
pub static FONT_AWESOME_OTF: &[u8] = include_bytes!("FontAwesome/fonts/FontAwesome.otf");
/// The `Theme` struct should be used instead of the static variables because
/// the `new()` method will look if the user has a theme directory in their
/// source folder and use the users theme instead of the default.
///
/// You should only ever use the static variables directly if you want to
/// override the user's theme with the defaults.
#[derive(Debug, PartialEq)]
pub struct Theme {
pub index: Vec<u8>,
pub head: Vec<u8>,
pub redirect: Vec<u8>,
pub header: Vec<u8>,
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pub chrome_css: Vec<u8>,
pub general_css: Vec<u8>,
pub print_css: Vec<u8>,
pub variables_css: Vec<u8>,
pub favicon_png: Option<Vec<u8>>,
pub favicon_svg: Option<Vec<u8>>,
pub js: Vec<u8>,
pub highlight_css: Vec<u8>,
pub tomorrow_night_css: Vec<u8>,
pub ayu_highlight_css: Vec<u8>,
pub highlight_js: Vec<u8>,
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pub clipboard_js: Vec<u8>,
}
impl Theme {
/// Creates a `Theme` from the given `theme_dir`.
/// If a file is found in the theme dir, it will override the default version.
pub fn new<P: AsRef<Path>>(theme_dir: P) -> Self {
let theme_dir = theme_dir.as_ref();
let mut theme = Theme::default();
// If the theme directory doesn't exist there's no point continuing...
if !theme_dir.exists() || !theme_dir.is_dir() {
return theme;
}
// Check for individual files, if they exist copy them across
{
let files = vec![
(theme_dir.join("index.hbs"), &mut theme.index),
(theme_dir.join("head.hbs"), &mut theme.head),
(theme_dir.join("redirect.hbs"), &mut theme.redirect),
(theme_dir.join("header.hbs"), &mut theme.header),
(theme_dir.join("book.js"), &mut theme.js),
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(theme_dir.join("css/chrome.css"), &mut theme.chrome_css),
(theme_dir.join("css/general.css"), &mut theme.general_css),
(theme_dir.join("css/print.css"), &mut theme.print_css),
(
theme_dir.join("css/variables.css"),
&mut theme.variables_css,
),
(theme_dir.join("highlight.js"), &mut theme.highlight_js),
(theme_dir.join("clipboard.min.js"), &mut theme.clipboard_js),
(theme_dir.join("highlight.css"), &mut theme.highlight_css),
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(
theme_dir.join("tomorrow-night.css"),
&mut theme.tomorrow_night_css,
),
(
theme_dir.join("ayu-highlight.css"),
&mut theme.ayu_highlight_css,
),
];
let load_with_warn = |filename: &Path, dest| {
if !filename.exists() {
// Don't warn if the file doesn't exist.
return false;
}
if let Err(e) = load_file_contents(filename, dest) {
warn!("Couldn't load custom file, {}: {}", filename.display(), e);
false
} else {
true
}
};
for (filename, dest) in files {
load_with_warn(&filename, dest);
}
// If the user overrides one favicon, but not the other, do not
// copy the default for the other.
let favicon_png = &mut theme.favicon_png.as_mut().unwrap();
let png = load_with_warn(&theme_dir.join("favicon.png"), favicon_png);
let favicon_svg = &mut theme.favicon_svg.as_mut().unwrap();
let svg = load_with_warn(&theme_dir.join("favicon.svg"), favicon_svg);
match (png, svg) {
(true, true) | (false, false) => {}
(true, false) => {
theme.favicon_svg = None;
}
(false, true) => {
theme.favicon_png = None;
}
}
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}
theme
}
}
impl Default for Theme {
fn default() -> Theme {
Theme {
index: INDEX.to_owned(),
head: HEAD.to_owned(),
redirect: REDIRECT.to_owned(),
header: HEADER.to_owned(),
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chrome_css: CHROME_CSS.to_owned(),
general_css: GENERAL_CSS.to_owned(),
print_css: PRINT_CSS.to_owned(),
variables_css: VARIABLES_CSS.to_owned(),
favicon_png: Some(FAVICON_PNG.to_owned()),
favicon_svg: Some(FAVICON_SVG.to_owned()),
js: JS.to_owned(),
highlight_css: HIGHLIGHT_CSS.to_owned(),
tomorrow_night_css: TOMORROW_NIGHT_CSS.to_owned(),
ayu_highlight_css: AYU_HIGHLIGHT_CSS.to_owned(),
highlight_js: HIGHLIGHT_JS.to_owned(),
clipboard_js: CLIPBOARD_JS.to_owned(),
}
}
}
/// Checks if a file exists, if so, the destination buffer will be filled with
/// its contents.
fn load_file_contents<P: AsRef<Path>>(filename: P, dest: &mut Vec<u8>) -> Result<()> {
let filename = filename.as_ref();
let mut buffer = Vec::new();
File::open(filename)?.read_to_end(&mut buffer)?;
// We needed the buffer so we'd only overwrite the existing content if we
// could successfully load the file into memory.
dest.clear();
dest.append(&mut buffer);
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
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use std::fs;
use std::path::PathBuf;
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use tempfile::Builder as TempFileBuilder;
#[test]
fn theme_uses_defaults_with_nonexistent_src_dir() {
let non_existent = PathBuf::from("/non/existent/directory/");
assert!(!non_existent.exists());
let should_be = Theme::default();
let got = Theme::new(&non_existent);
assert_eq!(got, should_be);
}
#[test]
fn theme_dir_overrides_defaults() {
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let files = [
"index.hbs",
"head.hbs",
"redirect.hbs",
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"header.hbs",
"favicon.png",
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"favicon.svg",
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"css/chrome.css",
"css/fonts.css",
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"css/general.css",
"css/print.css",
"css/variables.css",
"book.js",
"highlight.js",
"tomorrow-night.css",
"highlight.css",
"ayu-highlight.css",
"clipboard.min.js",
];
let temp = TempFileBuilder::new().prefix("mdbook-").tempdir().unwrap();
fs::create_dir(temp.path().join("css")).unwrap();
// "touch" all of the special files so we have empty copies
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for file in &files {
File::create(&temp.path().join(file)).unwrap();
}
let got = Theme::new(temp.path());
let empty = Theme {
index: Vec::new(),
head: Vec::new(),
redirect: Vec::new(),
header: Vec::new(),
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chrome_css: Vec::new(),
general_css: Vec::new(),
print_css: Vec::new(),
variables_css: Vec::new(),
favicon_png: Some(Vec::new()),
favicon_svg: Some(Vec::new()),
js: Vec::new(),
highlight_css: Vec::new(),
tomorrow_night_css: Vec::new(),
ayu_highlight_css: Vec::new(),
highlight_js: Vec::new(),
clipboard_js: Vec::new(),
};
assert_eq!(got, empty);
}
#[test]
fn favicon_override() {
let temp = TempFileBuilder::new().prefix("mdbook-").tempdir().unwrap();
fs::write(temp.path().join("favicon.png"), "1234").unwrap();
let got = Theme::new(temp.path());
assert_eq!(got.favicon_png.as_ref().unwrap(), b"1234");
assert_eq!(got.favicon_svg, None);
let temp = TempFileBuilder::new().prefix("mdbook-").tempdir().unwrap();
fs::write(temp.path().join("favicon.svg"), "4567").unwrap();
let got = Theme::new(temp.path());
assert_eq!(got.favicon_png, None);
assert_eq!(got.favicon_svg.as_ref().unwrap(), b"4567");
}
}