1 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! Markdown formatting for rustdoc
13 //! This module implements markdown formatting through the pulldown-cmark
14 //! rust-library. This module exposes all of the
15 //! functionality through a unit-struct, `Markdown`, which has an implementation
16 //! of `fmt::Display`. Example usage:
19 //! #![feature(rustc_private)]
21 //! use rustdoc::html::markdown::{RenderType, Markdown};
23 //! let s = "My *markdown* _text_";
24 //! let html = format!("{}", Markdown(s, RenderType::Pulldown));
25 //! // ... something using html
28 #![allow(non_camel_case_types)]
33 use std::cell::RefCell;
34 use std::collections::{HashMap, VecDeque};
35 use std::default::Default;
36 use std::fmt::{self, Write};
38 use syntax::feature_gate::UnstableFeatures;
39 use syntax::codemap::Span;
41 use html::render::derive_id;
42 use html::toc::TocBuilder;
44 use html::escape::Escape;
47 use pulldown_cmark::{html, Event, Tag, Parser};
48 use pulldown_cmark::{Options, OPTION_ENABLE_FOOTNOTES, OPTION_ENABLE_TABLES};
50 #[derive(PartialEq, Debug, Clone, Copy)]
56 /// A unit struct which has the `fmt::Display` trait implemented. When
57 /// formatted, this struct will emit the HTML corresponding to the rendered
58 /// version of the contained markdown string.
59 /// The second parameter is a list of link replacements
60 // The third parameter is whether we need a shorter version or not.
61 pub struct Markdown<'a>(pub &'a str, pub &'a [(String, String)], pub RenderType);
62 /// A unit struct like `Markdown`, that renders the markdown with a
63 /// table of contents.
64 pub struct MarkdownWithToc<'a>(pub &'a str, pub RenderType);
65 /// A unit struct like `Markdown`, that renders the markdown escaping HTML tags.
66 pub struct MarkdownHtml<'a>(pub &'a str, pub RenderType);
67 /// A unit struct like `Markdown`, that renders only the first paragraph.
68 pub struct MarkdownSummaryLine<'a>(pub &'a str, pub &'a [(String, String)]);
70 /// Controls whether a line will be hidden or shown in HTML output.
72 /// All lines are used in documentation tests.
79 fn for_html(self) -> Option<&'a str> {
81 Line::Shown(l) => Some(l),
82 Line::Hidden(_) => None,
86 fn for_code(self) -> &'a str {
94 // FIXME: There is a minor inconsistency here. For lines that start with ##, we
95 // have no easy way of removing a potential single space after the hashes, which
96 // is done in the single # case. This inconsistency seems okay, if non-ideal. In
97 // order to fix it we'd have to iterate to find the first non-# character, and
98 // then reallocate to remove it; which would make us return a String.
99 fn map_line(s: &str) -> Line {
100 let trimmed = s.trim();
101 if trimmed.starts_with("##") {
102 Line::Shown(&trimmed[1..])
103 } else if trimmed.starts_with("# ") {
105 Line::Hidden(&trimmed[2..])
106 } else if trimmed == "#" {
107 // We cannot handle '#text' because it could be #[attr].
114 /// Returns a new string with all consecutive whitespace collapsed into
117 /// Any leading or trailing whitespace will be trimmed.
118 fn collapse_whitespace(s: &str) -> String {
119 s.split_whitespace().collect::<Vec<_>>().join(" ")
122 /// Convert chars from a title for an id.
124 /// "Hello, world!" -> "hello-world"
125 fn slugify(c: char) -> Option<char> {
126 if c.is_alphanumeric() || c == '-' || c == '_' {
128 Some(c.to_ascii_lowercase())
132 } else if c.is_whitespace() && c.is_ascii() {
139 // Information about the playground if a URL has been specified, containing an
140 // optional crate name and the URL.
141 thread_local!(pub static PLAYGROUND: RefCell<Option<(Option<String>, String)>> = {
145 /// Adds syntax highlighting and playground Run buttons to rust code blocks.
146 struct CodeBlocks<'a, I: Iterator<Item = Event<'a>>> {
150 impl<'a, I: Iterator<Item = Event<'a>>> CodeBlocks<'a, I> {
151 fn new(iter: I) -> Self {
158 impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'a, I> {
159 type Item = Event<'a>;
161 fn next(&mut self) -> Option<Self::Item> {
162 let event = self.inner.next();
165 if let Some(Event::Start(Tag::CodeBlock(lang))) = event {
166 let parse_result = LangString::parse(&lang);
167 if !parse_result.rust {
168 return Some(Event::Start(Tag::CodeBlock(lang)));
170 compile_fail = parse_result.compile_fail;
171 ignore = parse_result.ignore;
176 let mut origtext = String::new();
177 for event in &mut self.inner {
179 Event::End(Tag::CodeBlock(..)) => break,
180 Event::Text(ref s) => {
181 origtext.push_str(s);
186 let lines = origtext.lines().filter_map(|l| map_line(l).for_html());
187 let text = lines.collect::<Vec<&str>>().join("\n");
188 PLAYGROUND.with(|play| {
189 // insert newline to clearly separate it from the
190 // previous block so we can shorten the html output
191 let mut s = String::from("\n");
192 let playground_button = play.borrow().as_ref().and_then(|&(ref krate, ref url)| {
196 let test = origtext.lines()
197 .map(|l| map_line(l).for_code())
198 .collect::<Vec<&str>>().join("\n");
199 let krate = krate.as_ref().map(|s| &**s);
200 let (test, _) = test::make_test(&test, krate, false,
201 &Default::default());
202 let channel = if test.contains("#![feature(") {
203 "&version=nightly"
207 // These characters don't need to be escaped in a URI.
208 // FIXME: use a library function for percent encoding.
209 fn dont_escape(c: u8) -> bool {
210 (b'a' <= c && c <= b'z') ||
211 (b'A' <= c && c <= b'Z') ||
212 (b'0' <= c && c <= b'9') ||
213 c == b'-' || c == b'_' || c == b'.' ||
214 c == b'~' || c == b'!' || c == b'\'' ||
215 c == b'(' || c == b')' || c == b'*'
217 let mut test_escaped = String::new();
218 for b in test.bytes() {
220 test_escaped.push(char::from(b));
222 write!(test_escaped, "%{:02X}", b).unwrap();
226 r#"<a class="test-arrow" target="_blank" href="{}?code={}{}">Run</a>"#,
227 url, test_escaped, channel
230 let tooltip = if ignore {
231 Some(("This example is not tested", "ignore"))
232 } else if compile_fail {
233 Some(("This example deliberately fails to compile", "compile_fail"))
237 s.push_str(&highlight::render_with_highlighting(
239 Some(&format!("rust-example-rendered{}",
240 if ignore { " ignore" }
241 else if compile_fail { " compile_fail" }
244 playground_button.as_ref().map(String::as_str),
246 Some(Event::Html(s.into()))
251 /// Make headings links with anchor ids and build up TOC.
252 struct LinkReplacer<'a, 'b, I: Iterator<Item = Event<'a>>> {
254 links: &'b [(String, String)]
257 impl<'a, 'b, I: Iterator<Item = Event<'a>>> LinkReplacer<'a, 'b, I> {
258 fn new(iter: I, links: &'b [(String, String)]) -> Self {
266 impl<'a, 'b, I: Iterator<Item = Event<'a>>> Iterator for LinkReplacer<'a, 'b, I> {
267 type Item = Event<'a>;
269 fn next(&mut self) -> Option<Self::Item> {
270 let event = self.inner.next();
271 if let Some(Event::Start(Tag::Link(dest, text))) = event {
272 if let Some(&(_, ref replace)) = self.links.into_iter().find(|link| &*link.0 == &*dest)
274 Some(Event::Start(Tag::Link(replace.to_owned().into(), text)))
276 Some(Event::Start(Tag::Link(dest, text)))
284 /// Make headings links with anchor ids and build up TOC.
285 struct HeadingLinks<'a, 'b, I: Iterator<Item = Event<'a>>> {
287 toc: Option<&'b mut TocBuilder>,
288 buf: VecDeque<Event<'a>>,
291 impl<'a, 'b, I: Iterator<Item = Event<'a>>> HeadingLinks<'a, 'b, I> {
292 fn new(iter: I, toc: Option<&'b mut TocBuilder>) -> Self {
296 buf: VecDeque::new(),
301 impl<'a, 'b, I: Iterator<Item = Event<'a>>> Iterator for HeadingLinks<'a, 'b, I> {
302 type Item = Event<'a>;
304 fn next(&mut self) -> Option<Self::Item> {
305 if let Some(e) = self.buf.pop_front() {
309 let event = self.inner.next();
310 if let Some(Event::Start(Tag::Header(level))) = event {
311 let mut id = String::new();
312 for event in &mut self.inner {
314 Event::End(Tag::Header(..)) => break,
315 Event::Text(ref text) => id.extend(text.chars().filter_map(slugify)),
318 self.buf.push_back(event);
320 let id = derive_id(id);
322 if let Some(ref mut builder) = self.toc {
323 let mut html_header = String::new();
324 html::push_html(&mut html_header, self.buf.iter().cloned());
325 let sec = builder.push(level as u32, html_header, id.clone());
326 self.buf.push_front(Event::InlineHtml(format!("{} ", sec).into()));
329 self.buf.push_back(Event::InlineHtml(format!("</a></h{}>", level).into()));
331 let start_tags = format!("<h{level} id=\"{id}\" class=\"section-header\">\
335 return Some(Event::InlineHtml(start_tags.into()));
341 /// Extracts just the first paragraph.
342 struct SummaryLine<'a, I: Iterator<Item = Event<'a>>> {
348 impl<'a, I: Iterator<Item = Event<'a>>> SummaryLine<'a, I> {
349 fn new(iter: I) -> Self {
358 impl<'a, I: Iterator<Item = Event<'a>>> Iterator for SummaryLine<'a, I> {
359 type Item = Event<'a>;
361 fn next(&mut self) -> Option<Self::Item> {
362 if self.started && self.depth == 0 {
368 let event = self.inner.next();
370 Some(Event::Start(..)) => self.depth += 1,
371 Some(Event::End(..)) => self.depth -= 1,
378 /// Moves all footnote definitions to the end and add back links to the
380 struct Footnotes<'a, I: Iterator<Item = Event<'a>>> {
382 footnotes: HashMap<String, (Vec<Event<'a>>, u16)>,
385 impl<'a, I: Iterator<Item = Event<'a>>> Footnotes<'a, I> {
386 fn new(iter: I) -> Self {
389 footnotes: HashMap::new(),
392 fn get_entry(&mut self, key: &str) -> &mut (Vec<Event<'a>>, u16) {
393 let new_id = self.footnotes.keys().count() + 1;
394 let key = key.to_owned();
395 self.footnotes.entry(key).or_insert((Vec::new(), new_id as u16))
399 impl<'a, I: Iterator<Item = Event<'a>>> Iterator for Footnotes<'a, I> {
400 type Item = Event<'a>;
402 fn next(&mut self) -> Option<Self::Item> {
404 match self.inner.next() {
405 Some(Event::FootnoteReference(ref reference)) => {
406 let entry = self.get_entry(&reference);
407 let reference = format!("<sup id=\"fnref{0}\"><a href=\"#fn{0}\">{0}\
410 return Some(Event::Html(reference.into()));
412 Some(Event::Start(Tag::FootnoteDefinition(def))) => {
413 let mut content = Vec::new();
414 for event in &mut self.inner {
415 if let Event::End(Tag::FootnoteDefinition(..)) = event {
420 let entry = self.get_entry(&def);
421 (*entry).0 = content;
423 Some(e) => return Some(e),
425 if !self.footnotes.is_empty() {
426 let mut v: Vec<_> = self.footnotes.drain().map(|(_, x)| x).collect();
427 v.sort_by(|a, b| a.1.cmp(&b.1));
428 let mut ret = String::from("<div class=\"footnotes\"><hr><ol>");
429 for (mut content, id) in v {
430 write!(ret, "<li id=\"fn{}\">", id).unwrap();
431 let mut is_paragraph = false;
432 if let Some(&Event::End(Tag::Paragraph)) = content.last() {
436 html::push_html(&mut ret, content.into_iter());
438 " <a href=\"#fnref{}\" rev=\"footnote\">↩</a>",
441 ret.push_str("</p>");
443 ret.push_str("</li>");
445 ret.push_str("</ol></div>");
446 return Some(Event::Html(ret.into()));
456 const DEF_OUNIT: libc::size_t = 64;
457 const HOEDOWN_EXT_NO_INTRA_EMPHASIS: libc::c_uint = 1 << 11;
458 const HOEDOWN_EXT_TABLES: libc::c_uint = 1 << 0;
459 const HOEDOWN_EXT_FENCED_CODE: libc::c_uint = 1 << 1;
460 const HOEDOWN_EXT_AUTOLINK: libc::c_uint = 1 << 3;
461 const HOEDOWN_EXT_STRIKETHROUGH: libc::c_uint = 1 << 4;
462 const HOEDOWN_EXT_SUPERSCRIPT: libc::c_uint = 1 << 8;
463 const HOEDOWN_EXT_FOOTNOTES: libc::c_uint = 1 << 2;
464 const HOEDOWN_HTML_ESCAPE: libc::c_uint = 1 << 1;
466 const HOEDOWN_EXTENSIONS: libc::c_uint =
467 HOEDOWN_EXT_NO_INTRA_EMPHASIS | HOEDOWN_EXT_TABLES |
468 HOEDOWN_EXT_FENCED_CODE | HOEDOWN_EXT_AUTOLINK |
469 HOEDOWN_EXT_STRIKETHROUGH | HOEDOWN_EXT_SUPERSCRIPT |
470 HOEDOWN_EXT_FOOTNOTES;
472 enum hoedown_document {}
474 type blockcodefn = extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
475 *const hoedown_buffer, *const hoedown_renderer_data,
478 type blockquotefn = extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
479 *const hoedown_renderer_data, libc::size_t);
481 type headerfn = extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
482 libc::c_int, *const hoedown_renderer_data,
485 type blockhtmlfn = extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
486 *const hoedown_renderer_data, libc::size_t);
488 type codespanfn = extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
489 *const hoedown_renderer_data, libc::size_t) -> libc::c_int;
491 type linkfn = extern "C" fn (*mut hoedown_buffer, *const hoedown_buffer,
492 *const hoedown_buffer, *const hoedown_buffer,
493 *const hoedown_renderer_data, libc::size_t) -> libc::c_int;
495 type entityfn = extern "C" fn (*mut hoedown_buffer, *const hoedown_buffer,
496 *const hoedown_renderer_data, libc::size_t);
498 type normaltextfn = extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
499 *const hoedown_renderer_data, libc::size_t);
502 struct hoedown_renderer_data {
503 opaque: *mut libc::c_void,
507 struct hoedown_renderer {
508 opaque: *mut libc::c_void,
510 blockcode: Option<blockcodefn>,
511 blockquote: Option<blockquotefn>,
512 header: Option<headerfn>,
514 other_block_level_callbacks: [libc::size_t; 11],
516 blockhtml: Option<blockhtmlfn>,
518 /* span level callbacks - NULL or return 0 prints the span verbatim */
519 autolink: libc::size_t, // unused
520 codespan: Option<codespanfn>,
521 other_span_level_callbacks_1: [libc::size_t; 7],
522 link: Option<linkfn>,
523 other_span_level_callbacks_2: [libc::size_t; 6],
525 /* low level callbacks - NULL copies input directly into the output */
526 entity: Option<entityfn>,
527 normal_text: Option<normaltextfn>,
529 /* header and footer */
530 other_callbacks: [libc::size_t; 2],
534 struct hoedown_html_renderer_state {
535 opaque: *mut libc::c_void,
536 toc_data: html_toc_data,
538 link_attributes: Option<extern "C" fn(*mut hoedown_buffer,
539 *const hoedown_buffer,
540 *const hoedown_renderer_data)>,
544 struct html_toc_data {
545 header_count: libc::c_int,
546 current_level: libc::c_int,
547 level_offset: libc::c_int,
548 nesting_level: libc::c_int,
552 struct hoedown_buffer {
560 dfltblk: extern "C" fn(*mut hoedown_buffer, *const hoedown_buffer,
561 *const hoedown_buffer, *const hoedown_renderer_data,
563 toc_builder: Option<TocBuilder>,
564 links: Option<Vec<String>>,
568 fn hoedown_html_renderer_new(render_flags: libc::c_uint,
569 nesting_level: libc::c_int)
570 -> *mut hoedown_renderer;
571 fn hoedown_html_renderer_free(renderer: *mut hoedown_renderer);
573 fn hoedown_document_new(rndr: *const hoedown_renderer,
574 extensions: libc::c_uint,
575 max_nesting: libc::size_t) -> *mut hoedown_document;
576 fn hoedown_document_render(doc: *mut hoedown_document,
577 ob: *mut hoedown_buffer,
579 doc_size: libc::size_t);
580 fn hoedown_document_free(md: *mut hoedown_document);
582 fn hoedown_buffer_new(unit: libc::size_t) -> *mut hoedown_buffer;
583 fn hoedown_buffer_free(b: *mut hoedown_buffer);
584 fn hoedown_buffer_put(b: *mut hoedown_buffer, c: *const u8, len: libc::size_t);
587 impl hoedown_buffer {
588 fn as_bytes(&self) -> &[u8] {
589 unsafe { slice::from_raw_parts(self.data, self.size as usize) }
593 extern fn hoedown_block(ob: *mut hoedown_buffer, orig_text: *const hoedown_buffer,
594 lang: *const hoedown_buffer, data: *const hoedown_renderer_data,
595 line: libc::size_t) {
597 if orig_text.is_null() { return }
599 let opaque = (*data).opaque as *mut hoedown_html_renderer_state;
600 let my_opaque: &MyOpaque = &*((*opaque).opaque as *const MyOpaque);
601 let text = (*orig_text).as_bytes();
602 let origtext = str::from_utf8(text).unwrap();
603 let origtext = origtext.trim_left();
604 debug!("docblock: ==============\n{:?}\n=======", text);
605 let mut compile_fail = false;
606 let mut ignore = false;
608 let rendered = if lang.is_null() || origtext.is_empty() {
611 let rlang = (*lang).as_bytes();
612 let rlang = str::from_utf8(rlang).unwrap();
613 let parse_result = LangString::parse(rlang);
614 compile_fail = parse_result.compile_fail;
615 ignore = parse_result.ignore;
616 if !parse_result.rust {
617 (my_opaque.dfltblk)(ob, orig_text, lang,
618 opaque as *const hoedown_renderer_data,
626 let lines = origtext.lines().filter_map(|l| map_line(l).for_html());
627 let text = lines.collect::<Vec<&str>>().join("\n");
628 if rendered { return }
629 PLAYGROUND.with(|play| {
630 // insert newline to clearly separate it from the
631 // previous block so we can shorten the html output
632 let mut s = String::from("\n");
633 let playground_button = play.borrow().as_ref().and_then(|&(ref krate, ref url)| {
637 let test = origtext.lines()
638 .map(|l| map_line(l).for_code())
639 .collect::<Vec<&str>>().join("\n");
640 let krate = krate.as_ref().map(|s| &**s);
641 let (test, _) = test::make_test(&test, krate, false,
642 &Default::default());
643 let channel = if test.contains("#![feature(") {
644 "&version=nightly"
648 // These characters don't need to be escaped in a URI.
649 // FIXME: use a library function for percent encoding.
650 fn dont_escape(c: u8) -> bool {
651 (b'a' <= c && c <= b'z') ||
652 (b'A' <= c && c <= b'Z') ||
653 (b'0' <= c && c <= b'9') ||
654 c == b'-' || c == b'_' || c == b'.' ||
655 c == b'~' || c == b'!' || c == b'\'' ||
656 c == b'(' || c == b')' || c == b'*'
658 let mut test_escaped = String::new();
659 for b in test.bytes() {
661 test_escaped.push(char::from(b));
663 write!(test_escaped, "%{:02X}", b).unwrap();
667 r#"<a class="test-arrow" target="_blank" href="{}?code={}{}">Run</a>"#,
668 url, test_escaped, channel
671 let tooltip = if ignore {
672 Some(("This example is not tested", "ignore"))
673 } else if compile_fail {
674 Some(("This example deliberately fails to compile", "compile_fail"))
678 s.push_str(&highlight::render_with_highlighting(
680 Some(&format!("rust-example-rendered{}",
681 if ignore { " ignore" }
682 else if compile_fail { " compile_fail" }
685 playground_button.as_ref().map(String::as_str),
687 hoedown_buffer_put(ob, s.as_ptr(), s.len());
692 extern fn hoedown_header(ob: *mut hoedown_buffer, text: *const hoedown_buffer,
693 level: libc::c_int, data: *const hoedown_renderer_data,
695 // hoedown does this, we may as well too
696 unsafe { hoedown_buffer_put(ob, "\n".as_ptr(), 1); }
698 // Extract the text provided
699 let s = if text.is_null() {
702 let s = unsafe { (*text).as_bytes() };
703 str::from_utf8(&s).unwrap().to_owned()
706 // Discard '<em>', '<code>' tags and some escaped characters,
707 // transform the contents of the header into a hyphenated string
708 // without non-alphanumeric characters other than '-' and '_'.
710 // This is a terrible hack working around how hoedown gives us rendered
711 // html for text rather than the raw text.
712 let mut id = s.clone();
713 let repl_sub = vec!["<em>", "</em>", "<code>", "</code>",
714 "<strong>", "</strong>",
715 "<", ">", "&", "'", """];
716 for sub in repl_sub {
717 id = id.replace(sub, "");
719 let id = id.chars().filter_map(|c| {
720 if c.is_alphanumeric() || c == '-' || c == '_' {
722 Some(c.to_ascii_lowercase())
726 } else if c.is_whitespace() && c.is_ascii() {
731 }).collect::<String>();
733 let opaque = unsafe { (*data).opaque as *mut hoedown_html_renderer_state };
734 let opaque = unsafe { &mut *((*opaque).opaque as *mut MyOpaque) };
736 let id = derive_id(id);
738 let sec = opaque.toc_builder.as_mut().map_or("".to_owned(), |builder| {
739 format!("{} ", builder.push(level as u32, s.clone(), id.clone()))
743 let text = format!("<h{lvl} id='{id}' class='section-header'>\
744 <a href='#{id}'>{sec}{}</a></h{lvl}>",
745 s, lvl = level, id = id, sec = sec);
747 unsafe { hoedown_buffer_put(ob, text.as_ptr(), text.len()); }
750 extern fn hoedown_codespan(
751 ob: *mut hoedown_buffer,
752 text: *const hoedown_buffer,
753 _: *const hoedown_renderer_data,
756 let content = if text.is_null() {
759 let bytes = unsafe { (*text).as_bytes() };
760 let s = str::from_utf8(bytes).unwrap();
761 collapse_whitespace(s)
764 let content = format!("<code>{}</code>", Escape(&content));
766 hoedown_buffer_put(ob, content.as_ptr(), content.len());
768 // Return anything except 0, which would mean "also print the code span verbatim".
772 pub fn render(w: &mut fmt::Formatter,
775 html_flags: libc::c_uint) -> fmt::Result {
778 let ob = hoedown_buffer_new(DEF_OUNIT);
779 let renderer = hoedown_html_renderer_new(html_flags, 0);
780 let mut opaque = MyOpaque {
781 dfltblk: (*renderer).blockcode.unwrap(),
782 toc_builder: if print_toc {Some(TocBuilder::new())} else {None},
785 (*((*renderer).opaque as *mut hoedown_html_renderer_state)).opaque
786 = &mut opaque as *mut _ as *mut libc::c_void;
787 (*renderer).blockcode = Some(hoedown_block);
788 (*renderer).header = Some(hoedown_header);
789 (*renderer).codespan = Some(hoedown_codespan);
791 let document = hoedown_document_new(renderer, HOEDOWN_EXTENSIONS, 16);
792 hoedown_document_render(document, ob, s.as_ptr(),
793 s.len() as libc::size_t);
794 hoedown_document_free(document);
796 hoedown_html_renderer_free(renderer);
798 let mut ret = opaque.toc_builder.map_or(Ok(()), |builder| {
799 write!(w, "<nav id=\"TOC\">{}</nav>", builder.into_toc())
803 let buf = (*ob).as_bytes();
804 ret = w.write_str(str::from_utf8(buf).unwrap());
806 hoedown_buffer_free(ob);
811 pub fn old_find_testable_code(doc: &str, tests: &mut ::test::Collector, position: Span) {
812 extern fn block(_ob: *mut hoedown_buffer,
813 text: *const hoedown_buffer,
814 lang: *const hoedown_buffer,
815 data: *const hoedown_renderer_data,
816 line: libc::size_t) {
818 if text.is_null() { return }
819 let block_info = if lang.is_null() {
820 LangString::all_false()
822 let lang = (*lang).as_bytes();
823 let s = str::from_utf8(lang).unwrap();
826 if !block_info.rust { return }
827 let text = (*text).as_bytes();
828 let opaque = (*data).opaque as *mut hoedown_html_renderer_state;
829 let tests = &mut *((*opaque).opaque as *mut ::test::Collector);
830 let text = str::from_utf8(text).unwrap();
831 let lines = text.lines().map(|l| map_line(l).for_code());
832 let text = lines.collect::<Vec<&str>>().join("\n");
833 let filename = tests.get_filename();
835 if tests.render_type == RenderType::Hoedown {
836 let line = tests.get_line() + line;
837 tests.add_test(text.to_owned(),
838 block_info.should_panic, block_info.no_run,
839 block_info.ignore, block_info.test_harness,
840 block_info.compile_fail, block_info.error_codes,
841 line, filename, block_info.allow_fail);
843 tests.add_old_test(text, filename);
848 extern fn header(_ob: *mut hoedown_buffer,
849 text: *const hoedown_buffer,
850 level: libc::c_int, data: *const hoedown_renderer_data,
853 let opaque = (*data).opaque as *mut hoedown_html_renderer_state;
854 let tests = &mut *((*opaque).opaque as *mut ::test::Collector);
856 tests.register_header("", level as u32);
858 let text = (*text).as_bytes();
859 let text = str::from_utf8(text).unwrap();
860 tests.register_header(text, level as u32);
865 tests.set_position(position);
867 let ob = hoedown_buffer_new(DEF_OUNIT);
868 let renderer = hoedown_html_renderer_new(0, 0);
869 (*renderer).blockcode = Some(block);
870 (*renderer).header = Some(header);
871 (*((*renderer).opaque as *mut hoedown_html_renderer_state)).opaque
872 = tests as *mut _ as *mut libc::c_void;
874 let document = hoedown_document_new(renderer, HOEDOWN_EXTENSIONS, 16);
875 hoedown_document_render(document, ob, doc.as_ptr(),
876 doc.len() as libc::size_t);
877 hoedown_document_free(document);
879 hoedown_html_renderer_free(renderer);
880 hoedown_buffer_free(ob);
884 pub fn find_testable_code(doc: &str, tests: &mut ::test::Collector, position: Span) {
885 tests.set_position(position);
887 let mut parser = Parser::new(doc);
888 let mut prev_offset = 0;
889 let mut nb_lines = 0;
890 let mut register_header = None;
891 'main: while let Some(event) = parser.next() {
893 Event::Start(Tag::CodeBlock(s)) => {
894 let block_info = if s.is_empty() {
895 LangString::all_false()
897 LangString::parse(&*s)
899 if !block_info.rust {
902 let mut test_s = String::new();
903 let mut offset = None;
905 let event = parser.next();
906 if let Some(event) = event {
908 Event::End(Tag::CodeBlock(_)) => break,
909 Event::Text(ref s) => {
911 if offset.is_none() {
912 offset = Some(parser.get_offset());
921 let offset = offset.unwrap_or(0);
922 let lines = test_s.lines().map(|l| map_line(l).for_code());
923 let text = lines.collect::<Vec<&str>>().join("\n");
924 nb_lines += doc[prev_offset..offset].lines().count();
925 let line = tests.get_line() + (nb_lines - 1);
926 let filename = tests.get_filename();
927 tests.add_test(text.to_owned(),
928 block_info.should_panic, block_info.no_run,
929 block_info.ignore, block_info.test_harness,
930 block_info.compile_fail, block_info.error_codes,
931 line, filename, block_info.allow_fail);
932 prev_offset = offset;
934 Event::Start(Tag::Header(level)) => {
935 register_header = Some(level as u32);
937 Event::Text(ref s) if register_header.is_some() => {
938 let level = register_header.unwrap();
940 tests.register_header("", level);
942 tests.register_header(s, level);
944 register_header = None;
951 #[derive(Eq, PartialEq, Clone, Debug)]
960 error_codes: Vec<String>,
965 fn all_false() -> LangString {
967 original: String::new(),
971 rust: true, // NB This used to be `notrust = false`
974 error_codes: Vec::new(),
979 fn parse(string: &str) -> LangString {
980 let mut seen_rust_tags = false;
981 let mut seen_other_tags = false;
982 let mut data = LangString::all_false();
983 let mut allow_error_code_check = false;
984 if UnstableFeatures::from_environment().is_nightly_build() {
985 allow_error_code_check = true;
988 data.original = string.to_owned();
989 let tokens = string.split(|c: char|
990 !(c == '_' || c == '-' || c.is_alphanumeric())
993 for token in tokens {
997 data.should_panic = true;
998 seen_rust_tags = seen_other_tags == false;
1000 "no_run" => { data.no_run = true; seen_rust_tags = !seen_other_tags; }
1001 "ignore" => { data.ignore = true; seen_rust_tags = !seen_other_tags; }
1002 "allow_fail" => { data.allow_fail = true; seen_rust_tags = !seen_other_tags; }
1003 "rust" => { data.rust = true; seen_rust_tags = true; }
1005 data.test_harness = true;
1006 seen_rust_tags = !seen_other_tags || seen_rust_tags;
1009 data.compile_fail = true;
1010 seen_rust_tags = !seen_other_tags || seen_rust_tags;
1013 x if allow_error_code_check && x.starts_with("E") && x.len() == 5 => {
1014 if let Ok(_) = x[1..].parse::<u32>() {
1015 data.error_codes.push(x.to_owned());
1016 seen_rust_tags = !seen_other_tags || seen_rust_tags;
1018 seen_other_tags = true;
1021 _ => { seen_other_tags = true }
1025 data.rust &= !seen_other_tags || seen_rust_tags;
1031 impl<'a> fmt::Display for Markdown<'a> {
1032 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1033 let Markdown(md, links, render_type) = *self;
1035 // This is actually common enough to special-case
1036 if md.is_empty() { return Ok(()) }
1037 if render_type == RenderType::Hoedown {
1038 render(fmt, md, false, 0)
1040 let mut opts = Options::empty();
1041 opts.insert(OPTION_ENABLE_TABLES);
1042 opts.insert(OPTION_ENABLE_FOOTNOTES);
1044 let p = Parser::new_ext(md, opts);
1046 let mut s = String::with_capacity(md.len() * 3 / 2);
1048 html::push_html(&mut s,
1052 HeadingLinks::new(p, None),
1060 impl<'a> fmt::Display for MarkdownWithToc<'a> {
1061 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1062 let MarkdownWithToc(md, render_type) = *self;
1064 if render_type == RenderType::Hoedown {
1065 render(fmt, md, true, 0)
1067 let mut opts = Options::empty();
1068 opts.insert(OPTION_ENABLE_TABLES);
1069 opts.insert(OPTION_ENABLE_FOOTNOTES);
1071 let p = Parser::new_ext(md, opts);
1073 let mut s = String::with_capacity(md.len() * 3 / 2);
1075 let mut toc = TocBuilder::new();
1077 html::push_html(&mut s,
1078 Footnotes::new(CodeBlocks::new(HeadingLinks::new(p, Some(&mut toc)))));
1080 write!(fmt, "<nav id=\"TOC\">{}</nav>", toc.into_toc())?;
1087 impl<'a> fmt::Display for MarkdownHtml<'a> {
1088 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1089 let MarkdownHtml(md, render_type) = *self;
1091 // This is actually common enough to special-case
1092 if md.is_empty() { return Ok(()) }
1093 if render_type == RenderType::Hoedown {
1094 render(fmt, md, false, HOEDOWN_HTML_ESCAPE)
1096 let mut opts = Options::empty();
1097 opts.insert(OPTION_ENABLE_TABLES);
1098 opts.insert(OPTION_ENABLE_FOOTNOTES);
1100 let p = Parser::new_ext(md, opts);
1102 // Treat inline HTML as plain text.
1103 let p = p.map(|event| match event {
1104 Event::Html(text) | Event::InlineHtml(text) => Event::Text(text),
1108 let mut s = String::with_capacity(md.len() * 3 / 2);
1110 html::push_html(&mut s,
1111 Footnotes::new(CodeBlocks::new(HeadingLinks::new(p, None))));
1118 impl<'a> fmt::Display for MarkdownSummaryLine<'a> {
1119 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1120 let MarkdownSummaryLine(md, links) = *self;
1121 // This is actually common enough to special-case
1122 if md.is_empty() { return Ok(()) }
1124 let p = Parser::new(md);
1126 let mut s = String::new();
1128 html::push_html(&mut s, LinkReplacer::new(SummaryLine::new(p), links));
1134 pub fn plain_summary_line(md: &str) -> String {
1135 struct ParserWrapper<'a> {
1141 impl<'a> Iterator for ParserWrapper<'a> {
1144 fn next(&mut self) -> Option<String> {
1145 let next_event = self.inner.next();
1146 if next_event.is_none() {
1149 let next_event = next_event.unwrap();
1150 let (ret, is_in) = match next_event {
1151 Event::Start(Tag::Paragraph) => (None, 1),
1152 Event::Start(Tag::Code) => (Some("`".to_owned()), 1),
1153 Event::End(Tag::Code) => (Some("`".to_owned()), -1),
1154 Event::Start(Tag::Header(_)) => (None, 1),
1155 Event::Text(ref s) if self.is_in > 0 => (Some(s.as_ref().to_owned()), 0),
1156 Event::End(Tag::Paragraph) | Event::End(Tag::Header(_)) => (None, -1),
1159 if is_in > 0 || (is_in < 0 && self.is_in > 0) {
1160 self.is_in += is_in;
1163 self.is_first = false;
1170 let mut s = String::with_capacity(md.len() * 3 / 2);
1171 let mut p = ParserWrapper {
1172 inner: Parser::new(md),
1176 while let Some(t) = p.next() {
1184 pub fn markdown_links(md: &str, render_type: RenderType) -> Vec<String> {
1190 RenderType::Hoedown => {
1191 extern fn hoedown_link(
1192 _ob: *mut hoedown_buffer,
1193 _content: *const hoedown_buffer,
1194 link: *const hoedown_buffer,
1195 _title: *const hoedown_buffer,
1196 data: *const hoedown_renderer_data,
1203 let opaque = unsafe { (*data).opaque as *mut hoedown_html_renderer_state };
1204 let opaque = unsafe { &mut *((*opaque).opaque as *mut MyOpaque) };
1206 if let Some(ref mut links) = opaque.links {
1207 let s = unsafe { (*link).as_bytes() };
1208 let s = str::from_utf8(&s).unwrap().to_owned();
1210 debug!("found link: {}", s);
1215 //returning 0 here means "emit the span verbatim", but we're not using the output
1216 //anyway so we don't really care
1221 let ob = hoedown_buffer_new(DEF_OUNIT);
1222 let renderer = hoedown_html_renderer_new(0, 0);
1223 let mut opaque = MyOpaque {
1224 dfltblk: (*renderer).blockcode.unwrap(),
1226 links: Some(vec![]),
1228 (*((*renderer).opaque as *mut hoedown_html_renderer_state)).opaque
1229 = &mut opaque as *mut _ as *mut libc::c_void;
1230 (*renderer).blockcode = Some(hoedown_block);
1231 (*renderer).header = Some(hoedown_header);
1232 (*renderer).codespan = Some(hoedown_codespan);
1233 (*renderer).link = Some(hoedown_link);
1235 let document = hoedown_document_new(renderer, HOEDOWN_EXTENSIONS, 16);
1236 hoedown_document_render(document, ob, md.as_ptr(),
1237 md.len() as libc::size_t);
1238 hoedown_document_free(document);
1240 hoedown_html_renderer_free(renderer);
1241 hoedown_buffer_free(ob);
1243 opaque.links.unwrap()
1246 RenderType::Pulldown => {
1247 let mut opts = Options::empty();
1248 opts.insert(OPTION_ENABLE_TABLES);
1249 opts.insert(OPTION_ENABLE_FOOTNOTES);
1251 let p = Parser::new_ext(md, opts);
1253 let iter = Footnotes::new(CodeBlocks::new(HeadingLinks::new(p, None)));
1254 let mut links = vec![];
1257 if let Event::Start(Tag::Link(dest, _)) = ev {
1258 debug!("found link: {}", dest);
1259 links.push(dest.into_owned());
1270 use super::{LangString, Markdown, MarkdownHtml};
1271 use super::plain_summary_line;
1272 use super::RenderType;
1273 use html::render::reset_ids;
1276 fn test_lang_string_parse() {
1278 should_panic: bool, no_run: bool, ignore: bool, rust: bool, test_harness: bool,
1279 compile_fail: bool, allow_fail: bool, error_codes: Vec<String>) {
1280 assert_eq!(LangString::parse(s), LangString {
1288 original: s.to_owned(),
1293 fn v() -> Vec<String> {
1297 // marker | should_panic| no_run| ignore| rust | test_harness| compile_fail
1298 // | allow_fail | error_codes
1299 t("", false, false, false, true, false, false, false, v());
1300 t("rust", false, false, false, true, false, false, false, v());
1301 t("sh", false, false, false, false, false, false, false, v());
1302 t("ignore", false, false, true, true, false, false, false, v());
1303 t("should_panic", true, false, false, true, false, false, false, v());
1304 t("no_run", false, true, false, true, false, false, false, v());
1305 t("test_harness", false, false, false, true, true, false, false, v());
1306 t("compile_fail", false, true, false, true, false, true, false, v());
1307 t("allow_fail", false, false, false, true, false, false, true, v());
1308 t("{.no_run .example}", false, true, false, true, false, false, false, v());
1309 t("{.sh .should_panic}", true, false, false, false, false, false, false, v());
1310 t("{.example .rust}", false, false, false, true, false, false, false, v());
1311 t("{.test_harness .rust}", false, false, false, true, true, false, false, v());
1312 t("text, no_run", false, true, false, false, false, false, false, v());
1313 t("text,no_run", false, true, false, false, false, false, false, v());
1318 let markdown = "# title";
1319 format!("{}", Markdown(markdown, RenderType::Pulldown));
1325 fn t(input: &str, expect: &str) {
1326 let output = format!("{}", Markdown(input, RenderType::Pulldown));
1327 assert_eq!(output, expect, "original: {}", input);
1331 t("# Foo bar", "<h1 id=\"foo-bar\" class=\"section-header\">\
1332 <a href=\"#foo-bar\">Foo bar</a></h1>");
1333 t("## Foo-bar_baz qux", "<h2 id=\"foo-bar_baz-qux\" class=\"section-\
1334 header\"><a href=\"#foo-bar_baz-qux\">Foo-bar_baz qux</a></h2>");
1335 t("### **Foo** *bar* baz!?!& -_qux_-%",
1336 "<h3 id=\"foo-bar-baz--qux-\" class=\"section-header\">\
1337 <a href=\"#foo-bar-baz--qux-\"><strong>Foo</strong> \
1338 <em>bar</em> baz!?!& -<em>qux</em>-%</a></h3>");
1339 t("#### **Foo?** & \\*bar?!* _`baz`_ ❤ #qux",
1340 "<h4 id=\"foo--bar--baz--qux\" class=\"section-header\">\
1341 <a href=\"#foo--bar--baz--qux\"><strong>Foo?</strong> & *bar?!* \
1342 <em><code>baz</code></em> ❤ #qux</a></h4>");
1346 fn test_header_ids_multiple_blocks() {
1347 fn t(input: &str, expect: &str) {
1348 let output = format!("{}", Markdown(input, RenderType::Pulldown));
1349 assert_eq!(output, expect, "original: {}", input);
1353 t("# Example", "<h1 id=\"example\" class=\"section-header\">\
1354 <a href=\"#example\">Example</a></h1>");
1355 t("# Panics", "<h1 id=\"panics\" class=\"section-header\">\
1356 <a href=\"#panics\">Panics</a></h1>");
1357 t("# Example", "<h1 id=\"example-1\" class=\"section-header\">\
1358 <a href=\"#example-1\">Example</a></h1>");
1359 t("# Main", "<h1 id=\"main-1\" class=\"section-header\">\
1360 <a href=\"#main-1\">Main</a></h1>");
1361 t("# Example", "<h1 id=\"example-2\" class=\"section-header\">\
1362 <a href=\"#example-2\">Example</a></h1>");
1363 t("# Panics", "<h1 id=\"panics-1\" class=\"section-header\">\
1364 <a href=\"#panics-1\">Panics</a></h1>");
1372 fn test_plain_summary_line() {
1373 fn t(input: &str, expect: &str) {
1374 let output = plain_summary_line(input);
1375 assert_eq!(output, expect, "original: {}", input);
1378 t("hello [Rust](https://www.rust-lang.org) :)", "hello Rust :)");
1379 t("hello [Rust](https://www.rust-lang.org \"Rust\") :)", "hello Rust :)");
1380 t("code `let x = i32;` ...", "code `let x = i32;` ...");
1381 t("type `Type<'static>` ...", "type `Type<'static>` ...");
1382 t("# top header", "top header");
1383 t("## header", "header");
1387 fn test_markdown_html_escape() {
1388 fn t(input: &str, expect: &str) {
1389 let output = format!("{}", MarkdownHtml(input, RenderType::Pulldown));
1390 assert_eq!(output, expect, "original: {}", input);
1393 t("`Struct<'a, T>`", "<p><code>Struct<'a, T></code></p>\n");
1394 t("Struct<'a, T>", "<p>Struct<'a, T></p>\n");
1395 t("Struct<br>", "<p>Struct<br></p>\n");