| use std::fs; |
| use std::path::Path; |
| use std::str; |
| use errors; |
| use crate::syntax::feature_gate::UnstableFeatures; |
| use crate::syntax::edition::Edition; |
| use crate::html::markdown::{IdMap, ErrorCodes, Markdown, Playground}; |
| |
| #[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: &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: &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: &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) |
| } |
