mdbook/crates/mdbook-html/src/html_handlebars/helpers/theme.rs
Eric Huss f6c062fc98 Enable unreachable_pub
This lint can help make it clearer which items are actually exposed in
the public API.
2025-07-25 09:02:55 -07:00

38 lines
1 KiB
Rust

use handlebars::{
Context, Handlebars, Helper, Output, RenderContext, RenderError, RenderErrorReason,
};
use log::trace;
pub(crate) fn theme_option(
h: &Helper<'_>,
_r: &Handlebars<'_>,
ctx: &Context,
rc: &mut RenderContext<'_, '_>,
out: &mut dyn Output,
) -> Result<(), RenderError> {
trace!("theme_option (handlebars helper)");
let param = h.param(0).and_then(|v| v.value().as_str()).ok_or_else(|| {
RenderErrorReason::ParamTypeMismatchForName(
"theme_option",
"0".to_owned(),
"string".to_owned(),
)
})?;
let default_theme = rc.evaluate(ctx, "@root/default_theme")?;
let default_theme_name = default_theme.as_json().as_str().ok_or_else(|| {
RenderErrorReason::ParamTypeMismatchForName(
"theme_option",
"default_theme".to_owned(),
"string".to_owned(),
)
})?;
out.write(param)?;
if param.to_lowercase() == default_theme_name.to_lowercase() {
out.write(" (default)")?;
}
Ok(())
}