223 lines
8.5 KiB
Rust
223 lines
8.5 KiB
Rust
extern crate handlebars;
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extern crate rustc_serialize;
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extern crate pulldown_cmark;
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use renderer::html_handlebars::helpers;
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use renderer::Renderer;
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use book::MDBook;
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use book::bookitem::BookItem;
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use {utils, theme};
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use std::path::{Path, PathBuf};
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use std::fs::{self, File};
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use std::error::Error;
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use std::io::{self, Read, Write};
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use std::collections::BTreeMap;
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use self::handlebars::{Handlebars, JsonRender};
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use self::rustc_serialize::json::{Json, ToJson};
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use self::pulldown_cmark::{Parser, html};
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pub struct HtmlHandlebars;
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impl HtmlHandlebars {
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pub fn new() -> Self {
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HtmlHandlebars
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}
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}
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impl Renderer for HtmlHandlebars {
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fn render(&self, book: &MDBook) -> Result<(), Box<Error>> {
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debug!("[fn]: render");
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let mut handlebars = Handlebars::new();
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// Load theme
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let theme = theme::Theme::new(book.get_src());
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// Register template
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debug!("[*]: Register handlebars template");
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try!(handlebars.register_template_string("index", try!(String::from_utf8(theme.index))));
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// Register helpers
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debug!("[*]: Register handlebars helpers");
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handlebars.register_helper("toc", Box::new(helpers::toc::RenderToc));
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handlebars.register_helper("previous", Box::new(helpers::navigation::previous));
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handlebars.register_helper("next", Box::new(helpers::navigation::next));
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let mut data = try!(make_data(book));
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// Print version
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let mut print_content: String = String::new();
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// Check if dest directory exists
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debug!("[*]: Check if destination directory exists");
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match utils::create_path(book.get_dest()) {
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Err(_) => return Err(Box::new(io::Error::new(io::ErrorKind::Other, "Unexcpected error when constructing destination path"))),
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_ => {},
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};
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// Render a file for every entry in the book
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let mut index = true;
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for item in book.iter() {
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match item {
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&BookItem::Chapter(_, ref ch) | &BookItem::Affix(ref ch) => {
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if ch.path != PathBuf::new() {
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let path = book.get_src().join(&ch.path);
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debug!("[*]: Opening file: {:?}", path);
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let mut f = try!(File::open(&path));
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let mut content: String = String::new();
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debug!("[*]: Reading file");
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try!(f.read_to_string(&mut content));
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// Render markdown using the pulldown-cmark crate
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content = render_html(&content);
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print_content.push_str(&content);
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// Remove content from previous file and render content for this one
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data.remove("path");
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match ch.path.to_str() {
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Some(p) => { data.insert("path".to_string(), p.to_json()); },
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None => return Err(Box::new(io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))),
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}
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// Remove content from previous file and render content for this one
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data.remove("content");
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data.insert("content".to_string(), content.to_json());
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// Remove path to root from previous file and render content for this one
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data.remove("path_to_root");
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data.insert("path_to_root".to_string(), utils::path_to_root(&ch.path).to_json());
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// Rendere the handlebars template with the data
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debug!("[*]: Render template");
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let rendered = try!(handlebars.render("index", &data));
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debug!("[*]: Create file {:?}", &book.get_dest().join(&ch.path).with_extension("html"));
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// Write to file
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let mut file = try!(utils::create_file(&book.get_dest().join(&ch.path).with_extension("html")));
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output!("[*] Creating {:?} ✓", &book.get_dest().join(&ch.path).with_extension("html"));
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try!(file.write_all(&rendered.into_bytes()));
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// Create an index.html from the first element in SUMMARY.md
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if index {
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debug!("[*]: index.html");
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try!(fs::copy(
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book.get_dest().join(&ch.path.with_extension("html")),
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book.get_dest().join("index.html")
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));
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output!(
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"[*] Creating index.html from {:?} ✓",
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book.get_dest().join(&ch.path.with_extension("html"))
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);
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index = false;
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}
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}
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}
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_ => {}
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}
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}
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// Print version
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// Remove content from previous file and render content for this one
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data.remove("path");
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data.insert("path".to_string(), "print.md".to_json());
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// Remove content from previous file and render content for this one
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data.remove("content");
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data.insert("content".to_string(), print_content.to_json());
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// Remove path to root from previous file and render content for this one
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data.remove("path_to_root");
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data.insert("path_to_root".to_string(), utils::path_to_root(Path::new("print.md")).to_json());
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// Rendere the handlebars template with the data
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debug!("[*]: Render template");
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let rendered = try!(handlebars.render("index", &data));
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let mut file = try!(utils::create_file(&book.get_dest().join("print").with_extension("html")));
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try!(file.write_all(&rendered.into_bytes()));
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output!("[*] Creating print.html ✓");
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// Copy static files (js, css, images, ...)
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debug!("[*] Copy static files");
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// JavaScript
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let mut js_file = try!(File::create(book.get_dest().join("book.js")));
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try!(js_file.write_all(&theme.js));
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// Css
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let mut css_file = try!(File::create(book.get_dest().join("book.css")));
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try!(css_file.write_all(&theme.css));
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// JQuery
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let mut jquery = try!(File::create(book.get_dest().join("jquery.js")));
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try!(jquery.write_all(&theme.jquery));
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// syntax highlighting
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let mut highlight_css = try!(File::create(book.get_dest().join("highlight.css")));
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try!(highlight_css.write_all(&theme.highlight_css));
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let mut highlight_js = try!(File::create(book.get_dest().join("highlight.js")));
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try!(highlight_js.write_all(&theme.highlight_js));
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Ok(())
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}
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}
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fn make_data(book: &MDBook) -> Result<BTreeMap<String,Json>, Box<Error>> {
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debug!("[fn]: make_data");
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let mut data = BTreeMap::new();
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data.insert("language".to_string(), "en".to_json());
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data.insert("title".to_string(), book.get_title().to_json());
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let mut chapters = vec![];
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for item in book.iter() {
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// Create the data to inject in the template
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let mut chapter = BTreeMap::new();
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match item {
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&BookItem::Affix(ref ch) => {
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chapter.insert("name".to_string(), ch.name.to_json());
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match ch.path.to_str() {
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Some(p) => { chapter.insert("path".to_string(), p.to_json()); },
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None => return Err(Box::new(io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))),
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}
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},
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&BookItem::Chapter(ref s, ref ch) => {
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chapter.insert("section".to_string(), s.to_json());
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chapter.insert("name".to_string(), ch.name.to_json());
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match ch.path.to_str() {
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Some(p) => { chapter.insert("path".to_string(), p.to_json()); },
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None => return Err(Box::new(io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))),
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}
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},
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&BookItem::Spacer => {
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chapter.insert("spacer".to_string(), "_spacer_".to_json());
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}
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}
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chapters.push(chapter);
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}
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data.insert("chapters".to_string(), chapters.to_json());
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debug!("[*]: JSON constructed");
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Ok(data)
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}
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fn render_html(text: &str) -> String {
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let mut s = String::with_capacity(text.len() * 3 / 2);
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let p = Parser::new(&text);
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html::push_html(&mut s, p);
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s
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}
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