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Apply baseline shift and italic compensation to non-textual elements

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This commit is contained in:
Malo 2025-04-19 17:57:47 +02:00
parent d55bebeaa1
commit 3a08d63b4b
3 changed files with 29 additions and 8 deletions
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4
crates/typst-layout/src/inline/collect.rs
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@ -206,7 +206,7 @@ pub fn collect<'a>(
}
InlineItem::Frame(mut frame) => {
frame.modify(&FrameModifiers::get_in(styles));
apply_baseline_shift(&mut frame, styles);
apply_shift(&engine.world, &mut frame, styles);
collector.push_item(Item::Frame(frame));
}
}
@ -221,7 +221,7 @@ pub fn collect<'a>(
let mut frame = layout_and_modify(styles, |styles| {
layout_box(elem, engine, loc, styles, region)
})?;
apply_baseline_shift(&mut frame, styles);
apply_shift(&engine.world, &mut frame, styles);
collector.push_item(Item::Frame(frame));
}
} else if let Some(elem) = child.to_packed::<TagElem>() {

31
crates/typst-layout/src/inline/line.rs
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@ -5,7 +5,7 @@ use typst_library::engine::Engine;
use typst_library::introspection::{SplitLocator, Tag};
use typst_library::layout::{Abs, Dir, Em, Fr, Frame, FrameItem, Point};
use typst_library::model::ParLineMarker;
use typst_library::text::{Lang, TextElem};
use typst_library::text::{variant, Lang, TextElem};
use typst_utils::Numeric;
use super::*;
@ -412,9 +412,30 @@ fn should_repeat_hyphen(pred_line: &Line, text: &str) -> bool {
}
}
/// Apply the current baseline shift to a frame.
pub fn apply_baseline_shift(frame: &mut Frame, styles: StyleChain) {
frame.translate(Point::with_y(TextElem::baseline_in(styles)));
/// Apply the current baseline shift and italic compensation to a frame.
pub fn apply_shift<'a>(
world: &Tracked<'a, dyn World + 'a>,
frame: &mut Frame,
styles: StyleChain,
) {
let mut baseline = TextElem::baseline_in(styles);
let mut compensation = Abs::zero();
if let Some(scripts) = TextElem::subperscript_in(styles) {
let font_metrics = TextElem::font_in(styles)
.into_iter()
.find_map(|family| {
world
.book()
.select(family.as_str(), variant(styles))
.and_then(|id| world.font(id))
})
.map_or(scripts.kind.default_metrics(), |f| {
scripts.kind.read_metrics(f.metrics())
});
baseline -= scripts.shift.unwrap_or(font_metrics.vertical_offset).resolve(styles);
compensation += font_metrics.horizontal_offset.resolve(styles);
}
frame.translate(Point::new(compensation, baseline));
}
/// Commit to a line and build its frame.
@ -519,7 +540,7 @@ pub fn commit(
let mut frame = layout_and_modify(*styles, |styles| {
layout_box(elem, engine, loc.relayout(), styles, region)
})?;
apply_baseline_shift(&mut frame, *styles);
apply_shift(&engine.world, &mut frame, *styles);
push(&mut offset, frame);
} else {
offset += amount;

2
crates/typst-layout/src/inline/mod.rs
View File

@ -28,7 +28,7 @@ use typst_utils::{Numeric, SliceExt};
use self::collect::{collect, Item, Segment, SpanMapper};
use self::deco::decorate;
use self::finalize::finalize;
use self::line::{apply_baseline_shift, commit, line, Line};
use self::line::{apply_shift, commit, line, Line};
use self::linebreak::{linebreak, Breakpoint};
use self::prepare::{prepare, Preparation};
use self::shaping::{