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snekdown/src/format/html/to_html.rs

679 lines
22 KiB
Rust

use crate::elements::*;
use crate::format::html::html_writer::HTMLWriter;
use crate::format::style::{get_code_theme_for_theme, get_css_for_theme};
use crate::format::PlaceholderTemplate;
use crate::references::glossary::{GlossaryDisplay, GlossaryReference};
use crate::references::templates::{Template, TemplateVariable};
use asciimath_rs::format::mathml::ToMathML;
use htmlescape::encode_attribute;
use minify::html::minify;
use std::io;
use syntect::html::highlighted_html_for_string;
const MATHJAX_URL: &str = "https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";
pub trait ToHtml {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()>;
}
impl ToHtml for Element {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
match self {
Element::Block(block) => block.to_html(writer),
Element::Inline(inline) => inline.to_html(writer),
Element::Line(line) => line.to_html(writer),
}
}
}
impl ToHtml for Line {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
match self {
Line::Text(text) => text.to_html(writer),
Line::Ruler(ruler) => ruler.to_html(writer),
Line::RefLink(anchor) => anchor.to_html(writer),
Line::Centered(centered) => centered.to_html(writer),
Line::Anchor(a) => a.to_html(writer),
_ => Ok(()),
}
}
}
impl ToHtml for Inline {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
match self {
Inline::Url(url) => url.to_html(writer),
Inline::Monospace(mono) => mono.to_html(writer),
Inline::Striked(striked) => striked.to_html(writer),
Inline::Plain(plain) => plain.to_html(writer),
Inline::Italic(italic) => italic.to_html(writer),
Inline::Underlined(under) => under.to_html(writer),
Inline::Bold(bold) => bold.to_html(writer),
Inline::Image(img) => img.to_html(writer),
Inline::Placeholder(placeholder) => placeholder.read().unwrap().to_html(writer),
Inline::Superscript(superscript) => superscript.to_html(writer),
Inline::Checkbox(checkbox) => checkbox.to_html(writer),
Inline::Emoji(emoji) => emoji.to_html(writer),
Inline::Colored(colored) => colored.to_html(writer),
Inline::BibReference(bibref) => bibref.read().unwrap().to_html(writer),
Inline::TemplateVar(var) => var.read().unwrap().to_html(writer),
Inline::Math(m) => m.to_html(writer),
Inline::LineBreak => writer.write("<br>".to_string()),
Inline::CharacterCode(code) => code.to_html(writer),
Inline::GlossaryReference(gloss) => gloss.lock().to_html(writer),
Inline::Arrow(a) => a.to_html(writer),
}
}
}
impl ToHtml for Block {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
match self {
Block::Paragraph(para) => para.to_html(writer),
Block::List(list) => list.to_html(writer),
Block::Table(table) => table.to_html(writer),
Block::CodeBlock(code) => code.to_html(writer),
Block::Quote(quote) => quote.to_html(writer),
Block::Section(section) => section.to_html(writer),
Block::Import(import) => import.to_html(writer),
Block::Placeholder(placeholder) => placeholder.read().unwrap().to_html(writer),
Block::MathBlock(m) => m.to_html(writer),
_ => Ok(()),
}
}
}
impl ToHtml for MetadataValue {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
match self {
MetadataValue::String(string) => writer.write_escaped(string.clone()),
MetadataValue::Integer(num) => writer.write(num.to_string()),
MetadataValue::Placeholder(ph) => ph.read().unwrap().to_html(writer),
MetadataValue::Bool(b) => writer.write(b.to_string()),
MetadataValue::Float(f) => writer.write(f.to_string()),
MetadataValue::Template(t) => t.to_html(writer),
}
}
}
impl ToHtml for Document {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
let path = if let Some(path) = &self.path {
format!("path=\"{}\"", encode_attribute(path.as_str()))
} else {
"".to_string()
};
if self.is_root {
let language = self.config.lock().metadata.language.clone();
let style = minify(get_css_for_theme(writer.get_theme()).as_str());
writer.write("<!DOCTYPE html>".to_string())?;
writer.write("<html lang=\"".to_string())?;
writer.write_attribute(language)?;
writer.write("\"><head ".to_string())?;
writer.write(path)?;
writer.write("/>".to_string())?;
writer.write("<meta charset=\"UTF-8\">".to_string())?;
writer.write("<style>".to_string())?;
writer.write(style)?;
writer.write("</style>".to_string())?;
for stylesheet in &self.stylesheets {
let mut stylesheet = stylesheet.lock();
let data = std::mem::replace(&mut stylesheet.data, None);
if let Some(data) = data {
if self.config.lock().features.include_mathjax {
writer.write(format!(
"<script id=\"MathJax-script\" type=\"text/javascript\" async src={}></script>",
MATHJAX_URL
))?;
}
writer.write("<style>".to_string())?;
writer.write(minify(String::from_utf8(data).unwrap().as_str()))?;
writer.write("</style>".to_string())?;
} else {
writer.write("<link rel=\"stylsheet\" href=\"".to_string())?;
writer.write_attribute(stylesheet.path.clone())?;
writer.write("\">".to_string())?;
}
}
writer.write("</head><body><div class=\"content\">".to_string())?;
for element in &self.elements {
element.to_html(writer)?;
}
writer.write("</div></body></html>".to_string())?;
} else {
writer.write("<div class=\"documentImport\" document-import=\"true\" ".to_string())?;
writer.write(path)?;
writer.write(">".to_string())?;
for element in &self.elements {
element.to_html(writer)?;
}
writer.write("</div>".to_string())?;
}
Ok(())
}
}
impl ToHtml for Math {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<math xmlns='http://www.w3.org/1998/Math/MathML'>".to_string())?;
writer.write(self.expression.to_mathml())?;
writer.write("</math>".to_string())
}
}
impl ToHtml for MathBlock {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write(
"<math xmlns='http://www.w3.org/1998/Math/MathML' display='block'>".to_string(),
)?;
writer.write(self.expression.to_mathml())?;
writer.write("</math>".to_string())
}
}
impl ToHtml for Import {
fn to_html(&self, _writer: &mut HTMLWriter) -> io::Result<()> {
Ok(())
}
}
impl ToHtml for Section {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<section>".to_string())?;
self.header.to_html(writer)?;
for element in &self.elements {
element.to_html(writer)?;
}
writer.write("</section>".to_string())
}
}
impl ToHtml for Header {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write(format!("<h{}", self.size))?;
writer.write(" id=\"".to_string())?;
writer.write_attribute(self.anchor.clone())?;
writer.write("\">".to_string())?;
self.line.to_html(writer)?;
writer.write(format!("</h{}>", self.size))
}
}
impl ToHtml for Paragraph {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<div class=\"paragraph\">".to_string())?;
if let Some(first) = self.elements.first() {
first.to_html(writer)?;
}
if self.elements.len() > 1 {
for element in &self.elements[1..] {
writer.write("<br/>".to_string())?;
element.to_html(writer)?;
}
}
writer.write("</div>".to_string())
}
}
impl ToHtml for List {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
if self.ordered {
writer.write("<ol>".to_string())?;
for item in &self.items {
item.to_html(writer)?;
}
writer.write("</ol>".to_string())
} else {
writer.write("<ul>".to_string())?;
for item in &self.items {
item.to_html(writer)?;
}
writer.write("</ul>".to_string())
}
}
}
impl ToHtml for ListItem {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<li>".to_string())?;
self.text.to_html(writer)?;
if let Some(first) = self.children.first() {
if first.ordered {
writer.write("<ol>".to_string())?;
for item in &self.children {
item.to_html(writer)?;
}
writer.write("</ol>".to_string())?;
} else {
writer.write("<ul>".to_string())?;
for item in &self.children {
item.to_html(writer)?;
}
writer.write("</ul>".to_string())?;
}
}
writer.write("</li>".to_string())
}
}
impl ToHtml for Table {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<div class=\"tableWrapper\"><table><tr>".to_string())?;
for cell in &self.header.cells {
writer.write("<th>".to_string())?;
cell.text.to_html(writer)?;
writer.write("</th>".to_string())?;
}
writer.write("</tr>".to_string())?;
for row in &self.rows {
row.to_html(writer)?;
}
writer.write("</table></div>".to_string())
}
}
impl ToHtml for Row {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<tr>".to_string())?;
for cell in &self.cells {
cell.to_html(writer)?;
}
writer.write("</tr>".to_string())
}
}
impl ToHtml for Cell {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<td>".to_string())?;
self.text.to_html(writer)?;
writer.write("</td>".to_string())
}
}
impl ToHtml for CodeBlock {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<div><code".to_string())?;
if self.language.len() > 0 {
writer.write(" lang=\"".to_string())?;
writer.write_attribute(self.language.clone())?;
writer.write("\">".to_string())?;
let (theme, syntax_set) = get_code_theme_for_theme(writer.get_theme());
if let Some(syntax) = syntax_set.find_syntax_by_token(self.language.as_str()) {
writer.write(highlighted_html_for_string(
self.code.as_str(),
&syntax_set,
syntax,
&theme,
))?;
} else {
writer.write("<pre>".to_string())?;
writer.write_escaped(self.code.clone())?;
writer.write("</pre>".to_string())?;
}
} else {
writer.write("><pre>".to_string())?;
writer.write_escaped(self.code.clone())?;
writer.write("</pre>".to_string())?;
}
writer.write("</code></div>".to_string())
}
}
impl ToHtml for Quote {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<div class=\"quote\"><blockquote>".to_string())?;
for line in &self.text {
line.to_html(writer)?;
writer.write("<br/>".to_string())?;
}
if let Some(meta) = self.metadata.clone() {
writer.write("<span class=\"metadata\">".to_string())?;
meta.to_html(writer)?;
writer.write("</span>".to_string())?;
}
writer.write("</blockquote></div>".to_string())
}
}
impl ToHtml for Ruler {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<hr/>".to_string())
}
}
impl ToHtml for TextLine {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
for text in &self.subtext {
text.to_html(writer)?;
}
Ok(())
}
}
impl ToHtml for Image {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
let mut style = String::new();
let url = if let Some(content) = self.get_content() {
let mime_type = self.get_mime_type();
format!(
"data:{};base64,{}",
mime_type.to_string(),
base64::encode(content)
)
} else {
encode_attribute(self.url.url.as_str())
};
if let Some(meta) = &self.metadata {
if let Some(width) = meta.get_string("width") {
style = format!("{}width: {};", style, width)
}
if let Some(height) = meta.get_string("height") {
style = format!("{}height: {};", style, height)
}
}
if let Some(description) = self.url.description.clone() {
writer.write("<div class=\"figure\"><a href=\"".to_string())?;
writer.write_attribute(url.clone())?;
writer.write("\"><img src=\"".to_string())?;
writer.write(url)?;
writer.write("\" style=\"".to_string())?;
writer.write(style)?;
writer.write("\"/></a><br><label class=\"imageDescripton\">".to_string())?;
for item in description {
item.to_html(writer)?;
writer.write("&#32;".to_string())?;
}
writer.write("</label></div>".to_string())?;
} else {
writer.write("<a href=\"".to_string())?;
writer.write(url.clone())?;
writer.write("\"><img src=\"".to_string())?;
writer.write(url)?;
writer.write("\" style=\"".to_string())?;
writer.write(style)?;
writer.write("\"/></a>".to_string())?;
}
Ok(())
}
}
impl ToHtml for BoldText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<b>".to_string())?;
for element in &self.value {
element.to_html(writer)?;
}
writer.write("</b>".to_string())
}
}
impl ToHtml for UnderlinedText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<u>".to_string())?;
for element in &self.value {
element.to_html(writer)?;
}
writer.write("</u>".to_string())
}
}
impl ToHtml for ItalicText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<i>".to_string())?;
for element in &self.value {
element.to_html(writer)?;
}
writer.write("</i>".to_string())
}
}
impl ToHtml for StrikedText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<del>".to_string())?;
for element in &self.value {
element.to_html(writer)?;
}
writer.write("</del>".to_string())
}
}
impl ToHtml for SuperscriptText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<sup>".to_string())?;
for element in &self.value {
element.to_html(writer)?;
}
writer.write("</sup>".to_string())
}
}
impl ToHtml for MonospaceText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<code class=\"inlineCode\">".to_string())?;
writer.write_escaped(self.value.clone())?;
writer.write("</code>".to_string())
}
}
impl ToHtml for Url {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<a href=\"".to_string())?;
writer.write(self.url.clone())?;
writer.write("\">".to_string())?;
if let Some(description) = self.description.clone() {
for desc in description {
desc.to_html(writer)?;
}
} else {
writer.write_escaped(self.url.clone())?;
}
writer.write("</a>".to_string())
}
}
impl ToHtml for PlainText {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write_escaped(self.value.clone())
}
}
impl ToHtml for Placeholder {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
if let Some(value) = &self.value {
value.to_html(writer)
} else {
log::debug!("Unknown placeholder [[{}]]", self.name.clone());
writer.write_escaped(format!("[[{}]]", self.name.clone()))?;
writer.write("<!--Unknown placeholder \"".to_string())?;
writer.write_escaped(self.name.clone())?;
writer.write("\"-->".to_string())
}
}
}
impl ToHtml for RefLink {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<a href=\"#".to_string())?;
writer.write_escaped(self.reference.clone())?;
writer.write("\">".to_string())?;
self.description.to_html(writer)?;
writer.write("</a>".to_string())
}
}
impl ToHtml for InlineMetadata {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
if let Some(MetadataValue::String(format)) = self.data.get("display") {
let mut template = PlaceholderTemplate::new(format.clone());
self.data
.iter()
.for_each(|(k, v)| template.add_replacement(k, &v.to_string()));
writer.write(template.render())?;
} else {
for (k, v) in &self.data {
writer.write_escaped(format!("{}={},", k, v.to_string()))?;
}
}
Ok(())
}
}
impl ToHtml for Centered {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<div class=\"centered\">".to_string())?;
self.line.to_html(writer)?;
writer.write("</div>".to_string())
}
}
impl ToHtml for Checkbox {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<input type=\"checkbox\" disabled ".to_string())?;
if self.value {
writer.write("checked".to_string())?;
}
writer.write("/>".to_string())
}
}
impl ToHtml for Emoji {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<span class=\"emoji\" emoji-name=\"".to_string())?;
writer.write_attribute(self.name.clone())?;
writer.write("\">".to_string())?;
writer.write(self.value.to_string())?;
writer.write("</span>".to_string())
}
}
impl ToHtml for Colored {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<span class=\"colored\" style=\"color:".to_string())?;
writer.write(self.color.clone())?;
writer.write(";\">".to_string())?;
self.value.to_html(writer)?;
writer.write("</span>".to_string())
}
}
impl ToHtml for BibReference {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<sup><a href=\"#".to_string())?;
writer.write_attribute(self.key.clone())?;
writer.write("\">".to_string())?;
writer.write(self.get_formatted())?;
writer.write("</a></sup>".to_string())
}
}
impl ToHtml for Template {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
for element in &self.text {
element.to_html(writer)?;
}
Ok(())
}
}
impl ToHtml for TemplateVariable {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
if let Some(value) = &self.value {
writer.write_escaped(self.prefix.clone())?;
value.to_html(writer)?;
writer.write_escaped(self.suffix.clone())?;
}
Ok(())
}
}
impl ToHtml for CharacterCode {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("&".to_string())?;
writer.write_escaped(self.code.clone())?;
writer.write(";".to_string())
}
}
impl ToHtml for Anchor {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<div id=\"".to_string())?;
writer.write_attribute(self.key.clone())?;
writer.write("\">".to_string())?;
self.inner.to_html(writer)?;
writer.write("</div>".to_string())
}
}
impl ToHtml for GlossaryReference {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
if let Some(entry) = &self.entry {
let entry = entry.lock();
writer.write("<a class=\"glossaryReference\" href=\"#".to_string())?;
writer.write_attribute(self.short.clone())?;
writer.write("\">".to_string())?;
match self.display {
GlossaryDisplay::Short => writer.write_escaped(entry.short.clone())?,
GlossaryDisplay::Long => writer.write_escaped(entry.long.clone())?,
}
writer.write("</a>".to_string())?;
} else {
writer.write_escaped(format!("~{}", self.short.clone()))?;
}
Ok(())
}
}
impl ToHtml for Arrow {
fn to_html(&self, writer: &mut HTMLWriter) -> io::Result<()> {
writer.write("<span class=\"arrow\">".to_string())?;
match self {
Arrow::RightArrow => writer.write("&xrarr;".to_string()),
Arrow::LeftArrow => writer.write("&xlarr;".to_string()),
Arrow::LeftRightArrow => writer.write("&xharr;".to_string()),
Arrow::BigRightArrow => writer.write("&xrArr;".to_string()),
Arrow::BigLeftArrow => writer.write("&xlArr;".to_string()),
Arrow::BigLeftRightArrow => writer.write("&xhArr;".to_string()),
}?;
writer.write("</span>".to_string())
}
}