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Fix HTML paste style leaking past closing tags of a, td, mark

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Found while testing crates/engine/src/cmd/richclip.rs:121-139 (html_to_body), with tag_kind at :175

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
NetterSilver
2026-10-28 04:52:34 +01:00
co-authored by Claude Haiku 5.5
parent 55e5ee56b4
commit e75a72c0cc
1 changed files with 39 additions and 13 deletions
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crates/engine/src/cmd/richclip.rs
+39 -13
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@@ -4,6 +4,8 @@
//! the same pair when it copies, and reads it back on paste: bold, italic and underline survive.
//! Anything else in the markup is skipped. A hostile fragment is capped, never executed.
use std::borrow::Cow;
use deckcraft_model::text::{Paragraph, Run, RunProps, TextBody};
const MAX_HTML: usize = 1 << 20;
@@ -77,7 +79,7 @@ pub fn html_to_body(html: &str) -> Option<TextBody> {
let mut bold = 0i32;
let mut italic = 0i32;
let mut underline = 0i32;
let mut stack: Vec<(&'static str, i32, i32, i32)> = Vec::new();
let mut stack: Vec<(Cow<'static, str>, i32, i32, i32)> = Vec::new();
let mut paragraphs: Vec<Paragraph> = vec![Paragraph::default()];
let mut runs = 0usize;
let mut skip = 0i32;
@@ -106,17 +108,18 @@ pub fn html_to_body(html: &str) -> Option<TextBody> {
continue;
}
if closing {
let kind = tag_kind(&name);
if !kind.is_empty() {
let search_start = stack.len().saturating_sub(64);
if let Some(offset) = stack[search_start..].iter().rposition(|e| e.0 == kind) {
let pos = search_start + offset;
let (_, db, di, du) = stack[pos];
bold -= db;
italic -= di;
underline -= du;
stack.truncate(pos);
}
let kind = match tag_kind(&name) {
"" => name.as_str(),
kind => kind,
};
let search_start = stack.len().saturating_sub(64);
if let Some(offset) = stack[search_start..].iter().rposition(|e| e.0.as_ref() == kind) {
let pos = search_start + offset;
let (db, di, du) = (stack[pos].1, stack[pos].2, stack[pos].3);
bold -= db;
italic -= di;
underline -= du;
stack.truncate(pos);
}
if is_block(&name) {
new_para(&mut paragraphs);
@@ -133,7 +136,11 @@ pub fn html_to_body(html: &str) -> Option<TextBody> {
italic += di;
underline += du;
if !token.ends_with('/') && stack.len() < 128 {
stack.push((tag_kind(&name), db, di, du));
let kind = match tag_kind(&name) {
"" => Cow::Owned(name.clone()),
kind => Cow::Borrowed(kind),
};
stack.push((kind, db, di, du));
} else {
bold -= db;
italic -= di;
@@ -368,6 +375,25 @@ fn fold(s: &str) -> String {
mod tests {
use super::*;
#[test]
fn style_on_other_tags_ends_at_their_close() {
type Prop = fn(&RunProps) -> bool;
let cases: [(&str, &str, Prop); 3] = [
("a", "font-weight:bold", |p| p.bold == Some(true)),
("td", "font-style:italic", |p| p.italic == Some(true)),
("mark", "text-decoration:underline", |p| p.underline.is_some()),
];
for (tag, style, prop) in cases {
let body = html_to_body(&format!("<p><{tag} style=\"{style}\">link</{tag}> plain</p>")).unwrap();
let runs = &body.paragraphs[0].runs;
assert_eq!(runs.len(), 2, "{tag}");
assert!(prop(&runs[0].props), "{tag}");
assert_eq!(runs[0].text, "link");
assert_eq!(runs[1].text, " plain");
assert!(runs[1].props.bold.is_none() && runs[1].props.italic.is_none() && runs[1].props.underline.is_none(), "{tag}");
}
}
#[test]
fn multibyte_after_ampersand_is_kept() {
let text = "é".repeat(20);