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Fix Unicode mapping of hyphenation artifacts (#6799)

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Laurenz 2025-08-21 16:21:56 +02:00 committed by GitHub
parent 727df723df
commit 2501da4bb6
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2 changed files with 18 additions and 6 deletions
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8
crates/typst-layout/src/inline/line.rs
View File

@ -178,7 +178,8 @@ pub fn line<'a>(
&& pred.dash == Some(Dash::Hard)
&& let Some(base) = pred.items.last_text()
&& should_repeat_hyphen(base.lang, full)
&& let Some(hyphen) = ShapedText::hyphen(engine, p.config.fallback, base, trim)
&& let Some(hyphen) =
ShapedText::hyphen(engine, p.config.fallback, base, trim, false)
{
items.push(Item::Text(hyphen), START_HYPHEN_IDX);
}
@ -188,7 +189,8 @@ pub fn line<'a>(
// Add a hyphen at the line end, if we ended on a soft hyphen.
if dash == Some(Dash::Soft)
&& let Some(base) = items.last_text()
&& let Some(hyphen) = ShapedText::hyphen(engine, p.config.fallback, base, trim)
&& let Some(hyphen) =
ShapedText::hyphen(engine, p.config.fallback, base, trim, true)
{
items.push(Item::Text(hyphen), END_HYPHEN_IDX);
}
@ -659,7 +661,7 @@ fn overhang(c: char) -> f64 {
match c {
// Dashes.
'–' | '—' => 0.2,
'-' => 0.55,
'-' | '\u{ad}' => 0.55,
// Punctuation.
'.' | ',' => 0.8,

16
crates/typst-layout/src/inline/shaping.rs
View File

@ -21,6 +21,11 @@ use unicode_script::{Script, UnicodeScript};
use super::{Item, Range, SpanMapper, decorate};
use crate::modifiers::FrameModifyText;
const SHY: char = '\u{ad}';
const SHY_STR: &str = "\u{ad}";
const HYPHEN: char = '-';
const HYPHEN_STR: &str = "-";
/// The result of shaping text.
///
/// This type contains owned or borrowed shaped text runs, which can be
@ -441,11 +446,15 @@ impl<'a> ShapedText<'a> {
}
/// Creates shaped text containing a hyphen.
///
/// If `soft` is true, the item will map to plain text as a soft hyphen.
/// Otherwise, it will map to a normal hyphen.
pub fn hyphen(
engine: &Engine,
fallback: bool,
base: &ShapedText<'a>,
pos: usize,
soft: bool,
) -> Option<Self> {
let world = engine.world;
let book = world.book();
@ -466,10 +475,11 @@ impl<'a> ShapedText<'a> {
let glyph_id = ttf.glyph_index('-')?;
let x_advance = font.to_em(ttf.glyph_hor_advance(glyph_id)?);
let size = base.styles.resolve(TextElem::size);
let (c, text) = if soft { (SHY, SHY_STR) } else { (HYPHEN, HYPHEN_STR) };
Some(ShapedText {
base: pos,
text: "",
text,
dir: base.dir,
lang: base.lang,
region: base.region,
@ -484,9 +494,9 @@ impl<'a> ShapedText<'a> {
y_offset: Em::zero(),
size,
adjustability: Adjustability::default(),
range: pos..pos,
range: pos..pos + text.len(),
safe_to_break: true,
c: '-',
c,
is_justifiable: false,
script: Script::Common,
}]),