include LaTeX png/svg files when checking for unused media
This commit is contained in:
Damien Elmes
parent
4cca3ecef5
commit
c890ef871e
@ -1,8 +1,9 @@
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// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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use crate::latex::contains_latex;
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use crate::template::RenderContext;
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use crate::text::{contains_latex, strip_html};
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use crate::text::strip_html;
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use lazy_static::lazy_static;
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use regex::Captures;
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use regex::Regex;
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122
rslib/src/latex.rs
Normal file
122
rslib/src/latex.rs
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@ -0,0 +1,122 @@
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// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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use crate::media::files::sha1_of_data;
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use crate::text::strip_html;
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use lazy_static::lazy_static;
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use regex::{Captures, Regex};
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use std::borrow::Cow;
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lazy_static! {
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static ref LATEX: Regex = Regex::new(
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r#"(?xsi)
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\[latex\](.+?)\[/latex\] # 1 - standard latex
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\[\$\](.+?)\[/\$\] # 2 - inline math
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\[\$\$\](.+?)\[/\$\$\] # 3 - math environment
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"#
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)
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.unwrap();
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static ref LATEX_NEWLINES: Regex = Regex::new(
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r#"(?xi)
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<br( /)?>
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<div>
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"#
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)
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.unwrap();
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}
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pub(crate) fn contains_latex(text: &str) -> bool {
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LATEX.is_match(text)
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}
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#[derive(Debug, PartialEq)]
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pub struct ExtractedLatex {
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pub fname: String,
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pub latex: String,
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}
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pub(crate) fn extract_latex(text: &str, svg: bool) -> (String, Vec<ExtractedLatex>) {
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let mut extracted = vec![];
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let new_text = LATEX.replace_all(text, |caps: &Captures| {
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let latex = match (caps.get(1), caps.get(2), caps.get(3)) {
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(Some(m), _, _) => m.as_str().into(),
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(_, Some(m), _) => format!("${}$", m.as_str()),
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(_, _, Some(m)) => format!(r"\begin{{displaymath}}{}\end{{displaymath}}", m.as_str()),
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_ => unreachable!(),
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};
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let latex_text = strip_html_for_latex(&latex);
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let fname = fname_for_latex(&latex_text, svg);
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let img_link = image_link_for_fname(&fname);
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extracted.push(ExtractedLatex {
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fname,
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latex: latex_text.into(),
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});
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img_link
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});
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(new_text.into(), extracted)
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}
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fn strip_html_for_latex(html: &str) -> Cow<str> {
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let mut out: Cow<str> = html.into();
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if let Cow::Owned(o) = LATEX_NEWLINES.replace_all(html, "\n") {
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out = o.into();
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}
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if let Cow::Owned(o) = strip_html(out.as_ref()) {
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out = o.into();
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}
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out
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}
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fn fname_for_latex(latex: &str, svg: bool) -> String {
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let ext = if svg { "svg" } else { "png" };
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let csum = hex::encode(sha1_of_data(latex.as_bytes()));
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format!("latex-{}.{}", csum, ext)
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}
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fn image_link_for_fname(fname: &str) -> String {
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format!("<img class=latex src=\"{}\">", fname)
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}
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#[cfg(test)]
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mod test {
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use crate::latex::{extract_latex, ExtractedLatex};
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#[test]
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fn latex() {
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let fname = "latex-ef30b3f4141c33a5bf7044b0d1961d3399c05d50.png";
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assert_eq!(
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extract_latex("a[latex]one<br>and<div>two[/latex]b", false),
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(
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format!("a<img class=latex src=\"{}\">b", fname),
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vec![ExtractedLatex {
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fname: fname.into(),
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latex: "one\nand\ntwo".into()
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}]
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)
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);
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assert_eq!(
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extract_latex("[$]<b>hello</b> world[/$]", true).1,
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vec![ExtractedLatex {
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fname: "latex-060219fbf3ddb74306abddaf4504276ad793b029.svg".to_string(),
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latex: "$hello world$".to_string()
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}]
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);
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assert_eq!(
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extract_latex("[$$]math & stuff[/$$]", false).1,
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vec![ExtractedLatex {
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fname: "latex-8899f3f849ffdef6e4e9f2f34a923a1f608ebc07.png".to_string(),
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latex: r"\begin{displaymath}math & stuff\end{displaymath}".to_string()
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}]
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);
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}
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}
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@ -12,6 +12,7 @@ pub fn version() -> &'static str {
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pub mod backend;
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pub mod cloze;
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pub mod err;
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pub mod latex;
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pub mod media;
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pub mod sched;
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pub mod template;
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@ -1,7 +1,9 @@
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// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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use crate::cloze::expand_clozes_to_reveal_latex;
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use crate::err::{AnkiError, Result};
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use crate::latex::extract_latex;
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use crate::media::col::{
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for_every_note, get_note_types, mark_collection_modified, open_or_create_collection_db,
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set_note, Note,
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@ -223,20 +225,19 @@ where
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if self.checked % 10 == 0 {
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self.maybe_fire_progress_cb()?;
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}
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let nt = note_types
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.get(¬e.mid)
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.ok_or_else(|| AnkiError::DBError {
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info: "missing note type".to_string(),
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})?;
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if fix_and_extract_media_refs(note, &mut referenced_files, renamed)? {
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// note was modified, needs saving
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set_note(
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&trx,
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note,
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note_types
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.get(¬e.mid)
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.ok_or_else(|| AnkiError::DBError {
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info: "missing note type".to_string(),
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})?,
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)?;
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set_note(&trx, note, nt)?;
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collection_modified = true;
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}
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// extract latex
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extract_latex_refs(note, &mut referenced_files, nt.latex_uses_svg());
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Ok(())
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})?;
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@ -320,6 +321,20 @@ fn find_unused_and_missing(
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(unused, references.into_iter().collect())
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}
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fn extract_latex_refs(note: &Note, seen_files: &mut HashSet<String>, svg: bool) {
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for field in note.fields() {
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let field_text: Cow<str> = if field.contains("{{c") {
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expand_clozes_to_reveal_latex(field).into()
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} else {
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field.into()
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};
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let (_, extracted) = extract_latex(field_text.as_ref(), svg);
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for e in extracted {
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seen_files.insert(e.fname);
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}
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}
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}
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#[cfg(test)]
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mod test {
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use crate::err::Result;
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@ -64,6 +64,15 @@ pub(super) struct NoteType {
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id: ObjID,
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#[serde(rename = "sortf")]
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sort_field_idx: u16,
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#[serde(rename = "latexsvg", default)]
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latex_svg: bool,
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}
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impl NoteType {
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pub fn latex_uses_svg(&self) -> bool {
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self.latex_svg
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}
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}
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pub(super) fn get_note_types(db: &Connection) -> Result<HashMap<ObjID, NoteType>> {
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@ -70,25 +70,26 @@ lazy_static! {
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(.*?) # 3 - field text
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\[/anki:tts\]
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"#).unwrap();
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static ref LATEX: Regex = Regex::new(
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r#"(?xsi)
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\[latex\](.+?)\[/latex\] # 1 - standard latex
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\[\$\](.+?)\[/\$\] # 2 - inline math
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\[\$\$\](.+?)\[/\$\$\] # 3 - math environment
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"#).unwrap();
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}
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pub fn strip_html(html: &str) -> Cow<str> {
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HTML.replace_all(html, "")
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let mut out: Cow<str> = html.into();
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if let Cow::Owned(o) = HTML.replace_all(html, "") {
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out = o.into();
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}
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if let Cow::Owned(o) = decode_entities(out.as_ref()) {
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out = o.into();
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}
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out
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}
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pub fn decode_entities(html: &str) -> Cow<str> {
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if html.contains('&') {
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match htmlescape::decode_html(html) {
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Ok(text) => text,
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Ok(text) => text.replace("\u{a0}", " "),
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Err(e) => format!("{:?}", e),
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}
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.into()
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@ -211,10 +212,6 @@ pub fn strip_html_preserving_image_filenames(html: &str) -> Cow<str> {
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without_html.into_owned().into()
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}
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pub(crate) fn contains_latex(text: &str) -> bool {
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LATEX.is_match(text)
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}
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pub(crate) fn normalize_to_nfc(s: &str) -> Cow<str> {
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if !is_nfc(s) {
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s.chars().nfc().collect::<String>().into()
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