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