| use std::path::Path; |
| use std::{fs, str}; |
| |
| use rustc_errors::DiagCtxtHandle; |
| use rustc_span::edition::Edition; |
| use serde::Serialize; |
| |
| use crate::html::markdown::{ErrorCodes, HeadingOffset, IdMap, Markdown, Playground}; |
| |
| #[derive(Clone, Debug, Serialize)] |
| pub(crate) struct ExternalHtml { |
| /// Content that will be included inline in the `<head>` section of a |
| /// rendered Markdown file or generated documentation |
| pub(crate) in_header: String, |
| /// Content that will be included inline between `<body>` and the content of |
| /// a rendered Markdown file or generated documentation |
| pub(crate) before_content: String, |
| /// Content that will be included inline between the content and `</body>` of |
| /// a rendered Markdown file or generated documentation |
| pub(crate) after_content: String, |
| } |
| |
| impl ExternalHtml { |
| pub(crate) fn load( |
| in_header: &[String], |
| before_content: &[String], |
| after_content: &[String], |
| md_before_content: &[String], |
| md_after_content: &[String], |
| nightly_build: bool, |
| dcx: DiagCtxtHandle<'_>, |
| id_map: &mut IdMap, |
| edition: Edition, |
| playground: &Option<Playground>, |
| ) -> Option<ExternalHtml> { |
| let codes = ErrorCodes::from(nightly_build); |
| let ih = load_external_files(in_header, dcx)?; |
| let bc = load_external_files(before_content, dcx)?; |
| let m_bc = load_external_files(md_before_content, dcx)?; |
| let bc = format!( |
| "{bc}{}", |
| Markdown { |
| content: &m_bc, |
| links: &[], |
| ids: id_map, |
| error_codes: codes, |
| edition, |
| playground, |
| heading_offset: HeadingOffset::H2, |
| } |
| .into_string() |
| ); |
| let ac = load_external_files(after_content, dcx)?; |
| let m_ac = load_external_files(md_after_content, dcx)?; |
| let ac = format!( |
| "{ac}{}", |
| Markdown { |
| content: &m_ac, |
| links: &[], |
| ids: id_map, |
| error_codes: codes, |
| edition, |
| playground, |
| heading_offset: HeadingOffset::H2, |
| } |
| .into_string() |
| ); |
| Some(ExternalHtml { in_header: ih, before_content: bc, after_content: ac }) |
| } |
| } |
| |
| pub(crate) enum LoadStringError { |
| ReadFail, |
| BadUtf8, |
| } |
| |
| pub(crate) fn load_string<P: AsRef<Path>>( |
| file_path: P, |
| dcx: DiagCtxtHandle<'_>, |
| ) -> Result<String, LoadStringError> { |
| let file_path = file_path.as_ref(); |
| let contents = match fs::read(file_path) { |
| Ok(bytes) => bytes, |
| Err(e) => { |
| dcx.struct_err(format!( |
| "error reading `{file_path}`: {e}", |
| file_path = file_path.display() |
| )) |
| .emit(); |
| return Err(LoadStringError::ReadFail); |
| } |
| }; |
| match str::from_utf8(&contents) { |
| Ok(s) => Ok(s.to_string()), |
| Err(_) => { |
| dcx.err(format!("error reading `{}`: not UTF-8", file_path.display())); |
| Err(LoadStringError::BadUtf8) |
| } |
| } |
| } |
| |
| fn load_external_files(names: &[String], dcx: DiagCtxtHandle<'_>) -> Option<String> { |
| let mut out = String::new(); |
| for name in names { |
| let Ok(s) = load_string(name, dcx) else { return None }; |
| out.push_str(&s); |
| out.push('\n'); |
| } |
| Some(out) |
| } |
