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_out: Option<Vec<String>>,
565 links_replace: Vec<(String, String)>,
569 fn hoedown_html_renderer_new(render_flags: libc::c_uint,
570 nesting_level: libc::c_int)
571 -> *mut hoedown_renderer;
572 fn hoedown_html_renderer_free(renderer: *mut hoedown_renderer);
574 fn hoedown_document_new(rndr: *const hoedown_renderer,
575 extensions: libc::c_uint,
576 max_nesting: libc::size_t) -> *mut hoedown_document;
577 fn hoedown_document_render(doc: *mut hoedown_document,
578 ob: *mut hoedown_buffer,
580 doc_size: libc::size_t);
581 fn hoedown_document_free(md: *mut hoedown_document);
583 fn hoedown_buffer_new(unit: libc::size_t) -> *mut hoedown_buffer;
584 fn hoedown_buffer_free(b: *mut hoedown_buffer);
585 fn hoedown_buffer_put(b: *mut hoedown_buffer, c: *const u8, len: libc::size_t);
588 impl hoedown_buffer {
589 fn as_bytes(&self) -> &[u8] {
590 unsafe { slice::from_raw_parts(self.data, self.size as usize) }
594 extern fn hoedown_block(ob: *mut hoedown_buffer, orig_text: *const hoedown_buffer,
595 lang: *const hoedown_buffer, data: *const hoedown_renderer_data,
596 line: libc::size_t) {
598 if orig_text.is_null() { return }
600 let opaque = (*data).opaque as *mut hoedown_html_renderer_state;
601 let my_opaque: &MyOpaque = &*((*opaque).opaque as *const MyOpaque);
602 let text = (*orig_text).as_bytes();
603 let origtext = str::from_utf8(text).unwrap();
604 let origtext = origtext.trim_left();
605 debug!("docblock: ==============\n{:?}\n=======", text);
606 let mut compile_fail = false;
607 let mut ignore = false;
609 let rendered = if lang.is_null() || origtext.is_empty() {
612 let rlang = (*lang).as_bytes();
613 let rlang = str::from_utf8(rlang).unwrap();
614 let parse_result = LangString::parse(rlang);
615 compile_fail = parse_result.compile_fail;
616 ignore = parse_result.ignore;
617 if !parse_result.rust {
618 (my_opaque.dfltblk)(ob, orig_text, lang,
619 opaque as *const hoedown_renderer_data,
627 let lines = origtext.lines().filter_map(|l| map_line(l).for_html());
628 let text = lines.collect::<Vec<&str>>().join("\n");
629 if rendered { return }
630 PLAYGROUND.with(|play| {
631 // insert newline to clearly separate it from the
632 // previous block so we can shorten the html output
633 let mut s = String::from("\n");
634 let playground_button = play.borrow().as_ref().and_then(|&(ref krate, ref url)| {
638 let test = origtext.lines()
639 .map(|l| map_line(l).for_code())
640 .collect::<Vec<&str>>().join("\n");
641 let krate = krate.as_ref().map(|s| &**s);
642 let (test, _) = test::make_test(&test, krate, false,
643 &Default::default());
644 let channel = if test.contains("#![feature(") {
645 "&version=nightly"
649 // These characters don't need to be escaped in a URI.
650 // FIXME: use a library function for percent encoding.
651 fn dont_escape(c: u8) -> bool {
652 (b'a' <= c && c <= b'z') ||
653 (b'A' <= c && c <= b'Z') ||
654 (b'0' <= c && c <= b'9') ||
655 c == b'-' || c == b'_' || c == b'.' ||
656 c == b'~' || c == b'!' || c == b'\'' ||
657 c == b'(' || c == b')' || c == b'*'
659 let mut test_escaped = String::new();
660 for b in test.bytes() {
662 test_escaped.push(char::from(b));
664 write!(test_escaped, "%{:02X}", b).unwrap();
668 r#"<a class="test-arrow" target="_blank" href="{}?code={}{}">Run</a>"#,
669 url, test_escaped, channel
672 let tooltip = if ignore {
673 Some(("This example is not tested", "ignore"))
674 } else if compile_fail {
675 Some(("This example deliberately fails to compile", "compile_fail"))
679 s.push_str(&highlight::render_with_highlighting(
681 Some(&format!("rust-example-rendered{}",
682 if ignore { " ignore" }
683 else if compile_fail { " compile_fail" }
686 playground_button.as_ref().map(String::as_str),
688 hoedown_buffer_put(ob, s.as_ptr(), s.len());
693 extern fn hoedown_header(ob: *mut hoedown_buffer, text: *const hoedown_buffer,
694 level: libc::c_int, data: *const hoedown_renderer_data,
696 // hoedown does this, we may as well too
697 unsafe { hoedown_buffer_put(ob, "\n".as_ptr(), 1); }
699 // Extract the text provided
700 let s = if text.is_null() {
703 let s = unsafe { (*text).as_bytes() };
704 str::from_utf8(&s).unwrap().to_owned()
707 // Discard '<em>', '<code>' tags and some escaped characters,
708 // transform the contents of the header into a hyphenated string
709 // without non-alphanumeric characters other than '-' and '_'.
711 // This is a terrible hack working around how hoedown gives us rendered
712 // html for text rather than the raw text.
713 let mut id = s.clone();
714 let repl_sub = vec!["<em>", "</em>", "<code>", "</code>",
715 "<strong>", "</strong>",
716 "<", ">", "&", "'", """];
717 for sub in repl_sub {
718 id = id.replace(sub, "");
720 let id = id.chars().filter_map(|c| {
721 if c.is_alphanumeric() || c == '-' || c == '_' {
723 Some(c.to_ascii_lowercase())
727 } else if c.is_whitespace() && c.is_ascii() {
732 }).collect::<String>();
734 let opaque = unsafe { (*data).opaque as *mut hoedown_html_renderer_state };
735 let opaque = unsafe { &mut *((*opaque).opaque as *mut MyOpaque) };
737 let id = derive_id(id);
739 let sec = opaque.toc_builder.as_mut().map_or("".to_owned(), |builder| {
740 format!("{} ", builder.push(level as u32, s.clone(), id.clone()))
744 let text = format!("<h{lvl} id='{id}' class='section-header'>\
745 <a href='#{id}'>{sec}{}</a></h{lvl}>",
746 s, lvl = level, id = id, sec = sec);
748 unsafe { hoedown_buffer_put(ob, text.as_ptr(), text.len()); }
751 extern fn hoedown_codespan(
752 ob: *mut hoedown_buffer,
753 text: *const hoedown_buffer,
754 _: *const hoedown_renderer_data,
757 let content = if text.is_null() {
760 let bytes = unsafe { (*text).as_bytes() };
761 let s = str::from_utf8(bytes).unwrap();
762 collapse_whitespace(s)
765 let content = format!("<code>{}</code>", Escape(&content));
767 hoedown_buffer_put(ob, content.as_ptr(), content.len());
769 // Return anything except 0, which would mean "also print the code span verbatim".
773 pub fn render(w: &mut fmt::Formatter,
775 links: &[(String, String)],
777 html_flags: libc::c_uint) -> fmt::Result {
778 extern fn hoedown_link(
779 ob: *mut hoedown_buffer,
780 content: *const hoedown_buffer,
781 link: *const hoedown_buffer,
782 title: *const hoedown_buffer,
783 data: *const hoedown_renderer_data,
790 let opaque = unsafe { (*data).opaque as *mut hoedown_html_renderer_state };
791 let opaque = unsafe { &mut *((*opaque).opaque as *mut MyOpaque) };
794 let s = unsafe { (*link).as_bytes() };
795 str::from_utf8(s).unwrap().to_owned()
798 let link = if let Some(&(_, ref new_target)) = opaque.links_replace
800 .find(|t| &*t.0 == &*link) {
801 new_target.to_owned()
806 let content = unsafe {
807 content.as_ref().map(|c| {
808 let s = c.as_bytes();
809 str::from_utf8(s).unwrap().to_owned()
814 title.as_ref().map(|t| {
815 let s = t.as_bytes();
816 str::from_utf8(s).unwrap().to_owned()
820 let link_out = format!("<a href=\"{link}\"{title}>{content}</a>",
822 title = title.map_or(String::new(),
823 |t| format!(" title=\"{}\"", t)),
824 content = content.unwrap_or(String::new()));
826 unsafe { hoedown_buffer_put(ob, link_out.as_ptr(), link_out.len()); }
828 //return "anything but 0" to show we've written the link in
833 let ob = hoedown_buffer_new(DEF_OUNIT);
834 let renderer = hoedown_html_renderer_new(html_flags, 0);
835 let mut opaque = MyOpaque {
836 dfltblk: (*renderer).blockcode.unwrap(),
837 toc_builder: if print_toc {Some(TocBuilder::new())} else {None},
839 links_replace: links.to_vec(),
841 (*((*renderer).opaque as *mut hoedown_html_renderer_state)).opaque
842 = &mut opaque as *mut _ as *mut libc::c_void;
843 (*renderer).blockcode = Some(hoedown_block);
844 (*renderer).header = Some(hoedown_header);
845 (*renderer).codespan = Some(hoedown_codespan);
846 (*renderer).link = Some(hoedown_link);
848 let document = hoedown_document_new(renderer, HOEDOWN_EXTENSIONS, 16);
849 hoedown_document_render(document, ob, s.as_ptr(),
850 s.len() as libc::size_t);
851 hoedown_document_free(document);
853 hoedown_html_renderer_free(renderer);
855 let mut ret = opaque.toc_builder.map_or(Ok(()), |builder| {
856 write!(w, "<nav id=\"TOC\">{}</nav>", builder.into_toc())
860 let buf = (*ob).as_bytes();
861 ret = w.write_str(str::from_utf8(buf).unwrap());
863 hoedown_buffer_free(ob);
868 pub fn old_find_testable_code(doc: &str, tests: &mut ::test::Collector, position: Span) {
869 extern fn block(_ob: *mut hoedown_buffer,
870 text: *const hoedown_buffer,
871 lang: *const hoedown_buffer,
872 data: *const hoedown_renderer_data,
873 line: libc::size_t) {
875 if text.is_null() { return }
876 let block_info = if lang.is_null() {
877 LangString::all_false()
879 let lang = (*lang).as_bytes();
880 let s = str::from_utf8(lang).unwrap();
883 if !block_info.rust { return }
884 let text = (*text).as_bytes();
885 let opaque = (*data).opaque as *mut hoedown_html_renderer_state;
886 let tests = &mut *((*opaque).opaque as *mut ::test::Collector);
887 let text = str::from_utf8(text).unwrap();
888 let lines = text.lines().map(|l| map_line(l).for_code());
889 let text = lines.collect::<Vec<&str>>().join("\n");
890 let filename = tests.get_filename();
892 if tests.render_type == RenderType::Hoedown {
893 let line = tests.get_line() + line;
894 tests.add_test(text.to_owned(),
895 block_info.should_panic, block_info.no_run,
896 block_info.ignore, block_info.test_harness,
897 block_info.compile_fail, block_info.error_codes,
898 line, filename, block_info.allow_fail);
900 tests.add_old_test(text, filename);
905 extern fn header(_ob: *mut hoedown_buffer,
906 text: *const hoedown_buffer,
907 level: libc::c_int, data: *const hoedown_renderer_data,
910 let opaque = (*data).opaque as *mut hoedown_html_renderer_state;
911 let tests = &mut *((*opaque).opaque as *mut ::test::Collector);
913 tests.register_header("", level as u32);
915 let text = (*text).as_bytes();
916 let text = str::from_utf8(text).unwrap();
917 tests.register_header(text, level as u32);
922 tests.set_position(position);
924 let ob = hoedown_buffer_new(DEF_OUNIT);
925 let renderer = hoedown_html_renderer_new(0, 0);
926 (*renderer).blockcode = Some(block);
927 (*renderer).header = Some(header);
928 (*((*renderer).opaque as *mut hoedown_html_renderer_state)).opaque
929 = tests as *mut _ as *mut libc::c_void;
931 let document = hoedown_document_new(renderer, HOEDOWN_EXTENSIONS, 16);
932 hoedown_document_render(document, ob, doc.as_ptr(),
933 doc.len() as libc::size_t);
934 hoedown_document_free(document);
936 hoedown_html_renderer_free(renderer);
937 hoedown_buffer_free(ob);
941 pub fn find_testable_code(doc: &str, tests: &mut ::test::Collector, position: Span) {
942 tests.set_position(position);
944 let mut parser = Parser::new(doc);
945 let mut prev_offset = 0;
946 let mut nb_lines = 0;
947 let mut register_header = None;
948 'main: while let Some(event) = parser.next() {
950 Event::Start(Tag::CodeBlock(s)) => {
951 let block_info = if s.is_empty() {
952 LangString::all_false()
954 LangString::parse(&*s)
956 if !block_info.rust {
959 let mut test_s = String::new();
960 let mut offset = None;
962 let event = parser.next();
963 if let Some(event) = event {
965 Event::End(Tag::CodeBlock(_)) => break,
966 Event::Text(ref s) => {
968 if offset.is_none() {
969 offset = Some(parser.get_offset());
978 let offset = offset.unwrap_or(0);
979 let lines = test_s.lines().map(|l| map_line(l).for_code());
980 let text = lines.collect::<Vec<&str>>().join("\n");
981 nb_lines += doc[prev_offset..offset].lines().count();
982 let line = tests.get_line() + (nb_lines - 1);
983 let filename = tests.get_filename();
984 tests.add_test(text.to_owned(),
985 block_info.should_panic, block_info.no_run,
986 block_info.ignore, block_info.test_harness,
987 block_info.compile_fail, block_info.error_codes,
988 line, filename, block_info.allow_fail);
989 prev_offset = offset;
991 Event::Start(Tag::Header(level)) => {
992 register_header = Some(level as u32);
994 Event::Text(ref s) if register_header.is_some() => {
995 let level = register_header.unwrap();
997 tests.register_header("", level);
999 tests.register_header(s, level);
1001 register_header = None;
1008 #[derive(Eq, PartialEq, Clone, Debug)]
1017 error_codes: Vec<String>,
1022 fn all_false() -> LangString {
1024 original: String::new(),
1025 should_panic: false,
1028 rust: true, // NB This used to be `notrust = false`
1029 test_harness: false,
1030 compile_fail: false,
1031 error_codes: Vec::new(),
1036 fn parse(string: &str) -> LangString {
1037 let mut seen_rust_tags = false;
1038 let mut seen_other_tags = false;
1039 let mut data = LangString::all_false();
1040 let mut allow_error_code_check = false;
1041 if UnstableFeatures::from_environment().is_nightly_build() {
1042 allow_error_code_check = true;
1045 data.original = string.to_owned();
1046 let tokens = string.split(|c: char|
1047 !(c == '_' || c == '-' || c.is_alphanumeric())
1050 for token in tokens {
1051 match token.trim() {
1054 data.should_panic = true;
1055 seen_rust_tags = seen_other_tags == false;
1057 "no_run" => { data.no_run = true; seen_rust_tags = !seen_other_tags; }
1058 "ignore" => { data.ignore = true; seen_rust_tags = !seen_other_tags; }
1059 "allow_fail" => { data.allow_fail = true; seen_rust_tags = !seen_other_tags; }
1060 "rust" => { data.rust = true; seen_rust_tags = true; }
1062 data.test_harness = true;
1063 seen_rust_tags = !seen_other_tags || seen_rust_tags;
1066 data.compile_fail = true;
1067 seen_rust_tags = !seen_other_tags || seen_rust_tags;
1070 x if allow_error_code_check && x.starts_with("E") && x.len() == 5 => {
1071 if let Ok(_) = x[1..].parse::<u32>() {
1072 data.error_codes.push(x.to_owned());
1073 seen_rust_tags = !seen_other_tags || seen_rust_tags;
1075 seen_other_tags = true;
1078 _ => { seen_other_tags = true }
1082 data.rust &= !seen_other_tags || seen_rust_tags;
1088 impl<'a> fmt::Display for Markdown<'a> {
1089 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1090 let Markdown(md, links, render_type) = *self;
1092 // This is actually common enough to special-case
1093 if md.is_empty() { return Ok(()) }
1094 if render_type == RenderType::Hoedown {
1095 render(fmt, md, links, false, 0)
1097 let mut opts = Options::empty();
1098 opts.insert(OPTION_ENABLE_TABLES);
1099 opts.insert(OPTION_ENABLE_FOOTNOTES);
1101 let p = Parser::new_ext(md, opts);
1103 let mut s = String::with_capacity(md.len() * 3 / 2);
1105 html::push_html(&mut s,
1109 HeadingLinks::new(p, None),
1117 impl<'a> fmt::Display for MarkdownWithToc<'a> {
1118 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1119 let MarkdownWithToc(md, render_type) = *self;
1121 if render_type == RenderType::Hoedown {
1122 render(fmt, md, &[], true, 0)
1124 let mut opts = Options::empty();
1125 opts.insert(OPTION_ENABLE_TABLES);
1126 opts.insert(OPTION_ENABLE_FOOTNOTES);
1128 let p = Parser::new_ext(md, opts);
1130 let mut s = String::with_capacity(md.len() * 3 / 2);
1132 let mut toc = TocBuilder::new();
1134 html::push_html(&mut s,
1135 Footnotes::new(CodeBlocks::new(HeadingLinks::new(p, Some(&mut toc)))));
1137 write!(fmt, "<nav id=\"TOC\">{}</nav>", toc.into_toc())?;
1144 impl<'a> fmt::Display for MarkdownHtml<'a> {
1145 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1146 let MarkdownHtml(md, render_type) = *self;
1148 // This is actually common enough to special-case
1149 if md.is_empty() { return Ok(()) }
1150 if render_type == RenderType::Hoedown {
1151 render(fmt, md, &[], false, HOEDOWN_HTML_ESCAPE)
1153 let mut opts = Options::empty();
1154 opts.insert(OPTION_ENABLE_TABLES);
1155 opts.insert(OPTION_ENABLE_FOOTNOTES);
1157 let p = Parser::new_ext(md, opts);
1159 // Treat inline HTML as plain text.
1160 let p = p.map(|event| match event {
1161 Event::Html(text) | Event::InlineHtml(text) => Event::Text(text),
1165 let mut s = String::with_capacity(md.len() * 3 / 2);
1167 html::push_html(&mut s,
1168 Footnotes::new(CodeBlocks::new(HeadingLinks::new(p, None))));
1175 impl<'a> fmt::Display for MarkdownSummaryLine<'a> {
1176 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1177 let MarkdownSummaryLine(md, links) = *self;
1178 // This is actually common enough to special-case
1179 if md.is_empty() { return Ok(()) }
1181 let p = Parser::new(md);
1183 let mut s = String::new();
1185 html::push_html(&mut s, LinkReplacer::new(SummaryLine::new(p), links));
1191 pub fn plain_summary_line(md: &str) -> String {
1192 struct ParserWrapper<'a> {
1198 impl<'a> Iterator for ParserWrapper<'a> {
1201 fn next(&mut self) -> Option<String> {
1202 let next_event = self.inner.next();
1203 if next_event.is_none() {
1206 let next_event = next_event.unwrap();
1207 let (ret, is_in) = match next_event {
1208 Event::Start(Tag::Paragraph) => (None, 1),
1209 Event::Start(Tag::Code) => (Some("`".to_owned()), 1),
1210 Event::End(Tag::Code) => (Some("`".to_owned()), -1),
1211 Event::Start(Tag::Header(_)) => (None, 1),
1212 Event::Text(ref s) if self.is_in > 0 => (Some(s.as_ref().to_owned()), 0),
1213 Event::End(Tag::Paragraph) | Event::End(Tag::Header(_)) => (None, -1),
1216 if is_in > 0 || (is_in < 0 && self.is_in > 0) {
1217 self.is_in += is_in;
1220 self.is_first = false;
1227 let mut s = String::with_capacity(md.len() * 3 / 2);
1228 let mut p = ParserWrapper {
1229 inner: Parser::new(md),
1233 while let Some(t) = p.next() {
1241 pub fn markdown_links(md: &str, render_type: RenderType) -> Vec<String> {
1247 RenderType::Hoedown => {
1248 extern fn hoedown_link(
1249 _ob: *mut hoedown_buffer,
1250 _content: *const hoedown_buffer,
1251 link: *const hoedown_buffer,
1252 _title: *const hoedown_buffer,
1253 data: *const hoedown_renderer_data,
1260 let opaque = unsafe { (*data).opaque as *mut hoedown_html_renderer_state };
1261 let opaque = unsafe { &mut *((*opaque).opaque as *mut MyOpaque) };
1263 if let Some(ref mut links) = opaque.links_out {
1264 let s = unsafe { (*link).as_bytes() };
1265 let s = str::from_utf8(&s).unwrap().to_owned();
1267 debug!("found link: {}", s);
1272 //returning 0 here means "emit the span verbatim", but we're not using the output
1273 //anyway so we don't really care
1278 let ob = hoedown_buffer_new(DEF_OUNIT);
1279 let renderer = hoedown_html_renderer_new(0, 0);
1280 let mut opaque = MyOpaque {
1281 dfltblk: (*renderer).blockcode.unwrap(),
1283 links_out: Some(vec![]),
1284 links_replace: vec![],
1286 (*((*renderer).opaque as *mut hoedown_html_renderer_state)).opaque
1287 = &mut opaque as *mut _ as *mut libc::c_void;
1288 (*renderer).blockcode = Some(hoedown_block);
1289 (*renderer).header = Some(hoedown_header);
1290 (*renderer).codespan = Some(hoedown_codespan);
1291 (*renderer).link = Some(hoedown_link);
1293 let document = hoedown_document_new(renderer, HOEDOWN_EXTENSIONS, 16);
1294 hoedown_document_render(document, ob, md.as_ptr(),
1295 md.len() as libc::size_t);
1296 hoedown_document_free(document);
1298 hoedown_html_renderer_free(renderer);
1299 hoedown_buffer_free(ob);
1301 opaque.links_out.unwrap()
1304 RenderType::Pulldown => {
1305 let mut opts = Options::empty();
1306 opts.insert(OPTION_ENABLE_TABLES);
1307 opts.insert(OPTION_ENABLE_FOOTNOTES);
1309 let p = Parser::new_ext(md, opts);
1311 let iter = Footnotes::new(CodeBlocks::new(HeadingLinks::new(p, None)));
1312 let mut links = vec![];
1315 if let Event::Start(Tag::Link(dest, _)) = ev {
1316 debug!("found link: {}", dest);
1317 links.push(dest.into_owned());
1328 use super::{LangString, Markdown, MarkdownHtml};
1329 use super::plain_summary_line;
1330 use super::RenderType;
1331 use html::render::reset_ids;
1334 fn test_lang_string_parse() {
1336 should_panic: bool, no_run: bool, ignore: bool, rust: bool, test_harness: bool,
1337 compile_fail: bool, allow_fail: bool, error_codes: Vec<String>) {
1338 assert_eq!(LangString::parse(s), LangString {
1346 original: s.to_owned(),
1351 fn v() -> Vec<String> {
1355 // marker | should_panic| no_run| ignore| rust | test_harness| compile_fail
1356 // | allow_fail | error_codes
1357 t("", false, false, false, true, false, false, false, v());
1358 t("rust", false, false, false, true, false, false, false, v());
1359 t("sh", false, false, false, false, false, false, false, v());
1360 t("ignore", false, false, true, true, false, false, false, v());
1361 t("should_panic", true, false, false, true, false, false, false, v());
1362 t("no_run", false, true, false, true, false, false, false, v());
1363 t("test_harness", false, false, false, true, true, false, false, v());
1364 t("compile_fail", false, true, false, true, false, true, false, v());
1365 t("allow_fail", false, false, false, true, false, false, true, v());
1366 t("{.no_run .example}", false, true, false, true, false, false, false, v());
1367 t("{.sh .should_panic}", true, false, false, false, false, false, false, v());
1368 t("{.example .rust}", false, false, false, true, false, false, false, v());
1369 t("{.test_harness .rust}", false, false, false, true, true, false, false, v());
1370 t("text, no_run", false, true, false, false, false, false, false, v());
1371 t("text,no_run", false, true, false, false, false, false, false, v());
1376 let markdown = "# title";
1377 format!("{}", Markdown(markdown, RenderType::Pulldown));
1383 fn t(input: &str, expect: &str) {
1384 let output = format!("{}", Markdown(input, RenderType::Pulldown));
1385 assert_eq!(output, expect, "original: {}", input);
1389 t("# Foo bar", "<h1 id=\"foo-bar\" class=\"section-header\">\
1390 <a href=\"#foo-bar\">Foo bar</a></h1>");
1391 t("## Foo-bar_baz qux", "<h2 id=\"foo-bar_baz-qux\" class=\"section-\
1392 header\"><a href=\"#foo-bar_baz-qux\">Foo-bar_baz qux</a></h2>");
1393 t("### **Foo** *bar* baz!?!& -_qux_-%",
1394 "<h3 id=\"foo-bar-baz--qux-\" class=\"section-header\">\
1395 <a href=\"#foo-bar-baz--qux-\"><strong>Foo</strong> \
1396 <em>bar</em> baz!?!& -<em>qux</em>-%</a></h3>");
1397 t("#### **Foo?** & \\*bar?!* _`baz`_ ❤ #qux",
1398 "<h4 id=\"foo--bar--baz--qux\" class=\"section-header\">\
1399 <a href=\"#foo--bar--baz--qux\"><strong>Foo?</strong> & *bar?!* \
1400 <em><code>baz</code></em> ❤ #qux</a></h4>");
1404 fn test_header_ids_multiple_blocks() {
1405 fn t(input: &str, expect: &str) {
1406 let output = format!("{}", Markdown(input, RenderType::Pulldown));
1407 assert_eq!(output, expect, "original: {}", input);
1411 t("# Example", "<h1 id=\"example\" class=\"section-header\">\
1412 <a href=\"#example\">Example</a></h1>");
1413 t("# Panics", "<h1 id=\"panics\" class=\"section-header\">\
1414 <a href=\"#panics\">Panics</a></h1>");
1415 t("# Example", "<h1 id=\"example-1\" class=\"section-header\">\
1416 <a href=\"#example-1\">Example</a></h1>");
1417 t("# Main", "<h1 id=\"main-1\" class=\"section-header\">\
1418 <a href=\"#main-1\">Main</a></h1>");
1419 t("# Example", "<h1 id=\"example-2\" class=\"section-header\">\
1420 <a href=\"#example-2\">Example</a></h1>");
1421 t("# Panics", "<h1 id=\"panics-1\" class=\"section-header\">\
1422 <a href=\"#panics-1\">Panics</a></h1>");
1430 fn test_plain_summary_line() {
1431 fn t(input: &str, expect: &str) {
1432 let output = plain_summary_line(input);
1433 assert_eq!(output, expect, "original: {}", input);
1436 t("hello [Rust](https://www.rust-lang.org) :)", "hello Rust :)");
1437 t("hello [Rust](https://www.rust-lang.org \"Rust\") :)", "hello Rust :)");
1438 t("code `let x = i32;` ...", "code `let x = i32;` ...");
1439 t("type `Type<'static>` ...", "type `Type<'static>` ...");
1440 t("# top header", "top header");
1441 t("## header", "header");
1445 fn test_markdown_html_escape() {
1446 fn t(input: &str, expect: &str) {
1447 let output = format!("{}", MarkdownHtml(input, RenderType::Pulldown));
1448 assert_eq!(output, expect, "original: {}", input);
1451 t("`Struct<'a, T>`", "<p><code>Struct<'a, T></code></p>\n");
1452 t("Struct<'a, T>", "<p>Struct<'a, T></p>\n");
1453 t("Struct<br>", "<p>Struct<br></p>\n");