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|
use std::io::Write;
use failure::Error;
// use crate::url::Url;
use crate::document_tree::{
Document,
HasChildren,
ExtraAttributes,
elements as e,
element_categories as c,
extra_attributes as a,
};
// static FOOTNOTE_SYMBOLS: [char; 10] = ['*', '†', '‡', '§', '¶', '#', '♠', '♥', '♦', '♣'];
pub fn render_html<W>(document: &Document, mut stream: W, standalone: bool) -> Result<(), Error> where W: Write {
if standalone {
document.render_html(stream.by_ref())
} else {
let stream = stream.by_ref();
for c in document.children() {
(*c).render_html(stream)?;
}
Ok(())
}
}
fn escape_html(text: &str) -> String {
text.replace('&', "&")
.replace('<', "<")
.replace('>', ">")
.replace('"', """)
}
trait HTMLRender {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write;
}
macro_rules! impl_html_render_cat {($cat:ident { $($member:ident),+ }) => {
impl HTMLRender for c::$cat {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
match self {$(
c::$cat::$member(elem) => (**elem).render_html(stream),
)+}
}
}
}}
macro_rules! impl_html_render_simple {( $($type:ident => $tag:ident),+ ) => { $(
impl HTMLRender for e::$type {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "<{}>", stringify!($tag))?;
for c in self.children() {
(*c).render_html(stream)?;
}
write!(stream, "</{}>", stringify!($tag))?;
Ok(())
}
}
)+ }}
macro_rules! impl_html_render_simple_nochildren {( $($type:ident => $tag:ident),+ ) => { $(
impl HTMLRender for e::$type {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "<{0}></{0}>", stringify!($tag))?;
Ok(())
}
}
)+ }}
// Impl
impl HTMLRender for Document {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "<!doctype html><html>")?;
for c in self.children() {
(*c).render_html(stream)?;
}
write!(stream, "</html>")?;
Ok(())
}
}
impl_html_render_cat!(StructuralSubElement { Title, Subtitle, Decoration, Docinfo, SubStructure });
impl_html_render_simple!(Title => h1, Subtitle => h2);
impl HTMLRender for e::Docinfo {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Like “YAML frontmatter” in Markdown
unimplemented!();
}
}
impl HTMLRender for e::Decoration {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Header or footer
unimplemented!();
}
}
impl_html_render_cat!(SubStructure { Topic, Sidebar, Transition, Section, BodyElement });
impl_html_render_simple!(Sidebar => aside, Section => section);
impl HTMLRender for e::Transition {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "<hr/>")?;
Ok(())
}
}
impl HTMLRender for e::Topic {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// A mini section with title
unimplemented!();
}
}
impl_html_render_cat!(BodyElement { Paragraph, LiteralBlock, DoctestBlock, MathBlock, Rubric, SubstitutionDefinition, Comment, Pending, Target, Raw, Image, Compound, Container, BulletList, EnumeratedList, DefinitionList, FieldList, OptionList, LineBlock, BlockQuote, Admonition, Attention, Hint, Note, Caution, Danger, Error, Important, Tip, Warning, Footnote, Citation, SystemMessage, Figure, Table });
impl_html_render_simple!(Paragraph => p, LiteralBlock => pre, MathBlock => math, Rubric => a, Compound => p, Container => div, BulletList => ul, EnumeratedList => ol, DefinitionList => dl, FieldList => dl, OptionList => pre, LineBlock => div, BlockQuote => blockquote, Admonition => aside, Attention => aside, Hint => aside, Note => aside, Caution => aside, Danger => aside, Error => aside, Important => aside, Tip => aside, Warning => aside, Figure => figure);
impl_html_render_simple_nochildren!(Table => table); //TODO: after implementing the table, move it to elems with children
impl<I> HTMLRender for I where I: e::Element + a::ExtraAttributes<a::Image> {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
let extra = self.extra();
if let Some(ref target) = extra.target {
write!(stream, "<a href=\"{}\">", escape_html(target.as_str()))?;
}
write!(stream, "<img")?;
if let Some(ref alt) = extra.alt {
write!(stream, " alt=\"{}\"", escape_html(alt))?;
}
// TODO: align: Option<AlignHV>
// TODO: height: Option<Measure>
// TODO: width: Option<Measure>
// TODO: scale: Option<u8>
write!(stream, " src=\"{}\" />", escape_html(extra.uri.as_str()))?;
if extra.target.is_some() {
write!(stream, "</a>")?;
}
Ok(())
}
}
impl HTMLRender for e::DoctestBlock {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// TODO
unimplemented!();
}
}
impl HTMLRender for e::SubstitutionDefinition {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// TODO: Should those be removed after resolving them
Ok(())
}
}
impl HTMLRender for e::Comment {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "<!--")?;
for c in self.children() {
(*c).render_html(stream)?;
}
write!(stream, "-->")?;
Ok(())
}
}
impl HTMLRender for e::Pending {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Will those be resolved by the time we get here?
unimplemented!();
}
}
impl HTMLRender for e::Target {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Should be resolved by now
Ok(())
}
}
impl HTMLRender for e::Raw {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
for c in self.children() {
write!(stream, "{}", c)?;
}
Ok(())
}
}
impl HTMLRender for e::Footnote {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
unimplemented!();
}
}
impl HTMLRender for e::Citation {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
unimplemented!();
}
}
impl HTMLRender for e::SystemMessage {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "<figure><caption>System Message</caption>")?;
for c in self.children() {
(*c).render_html(stream)?;
}
write!(stream, "</figure>")?;
Ok(())
}
}
impl_html_render_cat!(TextOrInlineElement { String, Emphasis, Strong, Literal, Reference, FootnoteReference, CitationReference, SubstitutionReference, TitleReference, Abbreviation, Acronym, Superscript, Subscript, Inline, Problematic, Generated, Math, TargetInline, RawInline, ImageInline });
impl_html_render_simple!(Emphasis => em, Strong => strong, Literal => code, FootnoteReference => a, CitationReference => a, TitleReference => a, Abbreviation => abbr, Acronym => acronym, Superscript => sup, Subscript => sub, Inline => span, Math => math, TargetInline => a);
impl HTMLRender for String {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
write!(stream, "{}", escape_html(self))?;
Ok(())
}
}
impl HTMLRender for e::Reference {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
let extra = self.extra();
write!(stream, "<a")?;
if let Some(ref target) = extra.refuri {
write!(stream, " href=\"{}\"", escape_html(target.as_str()))?;
}
/*
if let Some(ref name) = extra.name {
write!(stream, " title=\"{}\"", escape_html(&name.0))?;
}
*/
write!(stream, ">")?;
for c in self.children() {
(*c).render_html(stream)?;
}
write!(stream, "</a>")?;
Ok(())
}
}
impl HTMLRender for e::SubstitutionReference {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Will those be resolved by the time we get here?
unimplemented!();
}
}
impl HTMLRender for e::Problematic {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Broken inline markup leads to insertion of this in docutils
unimplemented!();
}
}
impl HTMLRender for e::Generated {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Section numbers and so on
unimplemented!();
}
}
impl HTMLRender for e::RawInline {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
for c in self.children() {
write!(stream, "{}", c)?;
}
Ok(())
}
}
//--------------\\
//Content Models\\
//--------------\\
impl_html_render_cat!(SubTopic { Title, BodyElement });
impl_html_render_cat!(SubSidebar { Topic, Title, Subtitle, BodyElement });
impl_html_render_simple!(ListItem => li);
impl HTMLRender for e::DefinitionListItem {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// Term→dt, Definition→dd, Classifier→???
unimplemented!();
}
}
impl HTMLRender for e::Field {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// FieldName→dt, FieldBody→dd
unimplemented!();
}
}
impl HTMLRender for e::OptionListItem {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
// OptionGroup→dt(s), Description→dd
unimplemented!();
}
}
impl_html_render_cat!(SubLineBlock { LineBlock, Line });
impl HTMLRender for e::Line {
fn render_html<W>(&self, stream: &mut W) -> Result<(), Error> where W: Write {
for c in self.children() {
(*c).render_html(stream)?;
}
write!(stream, "<br>")?;
Ok(())
}
}
impl_html_render_cat!(SubBlockQuote { Attribution, BodyElement });
impl_html_render_simple!(Attribution => cite); //TODO: correct?
impl_html_render_cat!(SubFigure { Caption, Legend, BodyElement });
impl_html_render_simple!(Caption => caption);
impl HTMLRender for e::Legend {
fn render_html<W>(&self, _stream: &mut W) -> Result<(), Error> where W: Write {
unimplemented!();
}
}
//------------\\
//Things to do\\
//------------\\
//TODO: prettyprint option list
//TODO: render admonitions: Admonition, Attention, Hint, Note, Caution, Danger, Error, Important, Tip, Warning
//TODO: properly render tables
//TODO: add reference target: FootnoteReference, CitationReference, TitleReference
//TODO: add title: Abbr, Acronym
//TODO: convert math, set display attr
//TODO: add id: Rubric, Target, TargetInline
|
