Respect par constructor arguments (#5842)

crates/typst-layout/src/flow/collect.rs

@@ -124,7 +124,6 @@ impl<'a> Collector<'a, '_, '_> {
             styles,
             self.base,
             self.expand,
-            None,
         )?
         .into_frames();
 
@@ -133,7 +132,8 @@ impl<'a> Collector<'a, '_, '_> {
             self.output.push(Child::Tag(&elem.tag));
         }
 
-        self.lines(lines, styles);
+        let leading = ParElem::leading_in(styles);
+        self.lines(lines, leading, styles);
 
         for (c, _) in &self.children[end..] {
             let elem = c.to_packed::<TagElem>().unwrap();
@@ -169,10 +169,12 @@ impl<'a> Collector<'a, '_, '_> {
         )?
         .into_frames();
 
-        let spacing = ParElem::spacing_in(styles);
+        let spacing = elem.spacing(styles);
+        let leading = elem.leading(styles);
+
         self.output.push(Child::Rel(spacing.into(), 4));
 
-        self.lines(lines, styles);
+        self.lines(lines, leading, styles);
 
         self.output.push(Child::Rel(spacing.into(), 4));
         self.par_situation = ParSituation::Consecutive;
@@ -181,9 +183,8 @@ impl<'a> Collector<'a, '_, '_> {
     }
 
     /// Collect laid-out lines.
-    fn lines(&mut self, lines: Vec<Frame>, styles: StyleChain<'a>) {
+    fn lines(&mut self, lines: Vec<Frame>, leading: Abs, styles: StyleChain<'a>) {
         let align = AlignElem::alignment_in(styles).resolve(styles);
-        let leading = ParElem::leading_in(styles);
         let costs = TextElem::costs_in(styles);
 
         // Determine whether to prevent widow and orphans.

crates/typst-layout/src/flow/mod.rs

@@ -197,7 +197,50 @@ pub fn layout_flow<'a>(
     mode: FlowMode,
 ) -> SourceResult<Fragment> {
     // Prepare configuration that is shared across the whole flow.
-    let config = Config {
+    let config = configuration(shared, regions, columns, column_gutter, mode);
+
+    // Collect the elements into pre-processed children. These are much easier
+    // to handle than the raw elements.
+    let bump = Bump::new();
+    let children = collect(
+        engine,
+        &bump,
+        children,
+        locator.next(&()),
+        Size::new(config.columns.width, regions.full),
+        regions.expand.x,
+        mode,
+    )?;
+
+    let mut work = Work::new(&children);
+    let mut finished = vec![];
+
+    // This loop runs once per region produced by the flow layout.
+    loop {
+        let frame = compose(engine, &mut work, &config, locator.next(&()), regions)?;
+        finished.push(frame);
+
+        // Terminate the loop when everything is processed, though draining the
+        // backlog if necessary.
+        if work.done() && (!regions.expand.y || regions.backlog.is_empty()) {
+            break;
+        }
+
+        regions.next();
+    }
+
+    Ok(Fragment::frames(finished))
+}
+
+/// Determine the flow's configuration.
+fn configuration<'x>(
+    shared: StyleChain<'x>,
+    regions: Regions,
+    columns: NonZeroUsize,
+    column_gutter: Rel<Abs>,
+    mode: FlowMode,
+) -> Config<'x> {
+    Config {
         mode,
         shared,
         columns: {
@@ -235,39 +278,7 @@ pub fn layout_flow<'a>(
                 )
             },
         }),
-    };
-
-    // Collect the elements into pre-processed children. These are much easier
-    // to handle than the raw elements.
-    let bump = Bump::new();
-    let children = collect(
-        engine,
-        &bump,
-        children,
-        locator.next(&()),
-        Size::new(config.columns.width, regions.full),
-        regions.expand.x,
-        mode,
-    )?;
-
-    let mut work = Work::new(&children);
-    let mut finished = vec![];
-
-    // This loop runs once per region produced by the flow layout.
-    loop {
-        let frame = compose(engine, &mut work, &config, locator.next(&()), regions)?;
-        finished.push(frame);
-
-        // Terminate the loop when everything is processed, though draining the
-        // backlog if necessary.
-        if work.done() && (!regions.expand.y || regions.backlog.is_empty()) {
-            break;
-        }
-
-        regions.next();
     }
-
-    Ok(Fragment::frames(finished))
 }
 
 /// The work that is left to do by flow layout.

crates/typst-layout/src/inline/collect.rs

@@ -2,10 +2,8 @@ use typst_library::diag::warning;
 use typst_library::foundations::{Packed, Resolve};
 use typst_library::introspection::{SplitLocator, Tag, TagElem};
 use typst_library::layout::{
-    Abs, AlignElem, BoxElem, Dir, Fr, Frame, HElem, InlineElem, InlineItem, Sizing,
+    Abs, BoxElem, Dir, Fr, Frame, HElem, InlineElem, InlineItem, Sizing, Spacing,
-    Spacing,
 };
-use typst_library::model::{EnumElem, ListElem, TermsElem};
 use typst_library::routines::Pair;
 use typst_library::text::{
     is_default_ignorable, LinebreakElem, SmartQuoteElem, SmartQuoter, SmartQuotes,
@@ -123,40 +121,20 @@ pub fn collect<'a>(
     children: &[Pair<'a>],
     engine: &mut Engine<'_>,
     locator: &mut SplitLocator<'a>,
-    styles: StyleChain<'a>,
+    config: &Config,
     region: Size,
-    situation: Option<ParSituation>,
 ) -> SourceResult<(String, Vec<Segment<'a>>, SpanMapper)> {
     let mut collector = Collector::new(2 + children.len());
     let mut quoter = SmartQuoter::new();
 
-    let outer_dir = TextElem::dir_in(styles);
+    if !config.first_line_indent.is_zero() {
+        collector.push_item(Item::Absolute(config.first_line_indent, false));
+        collector.spans.push(1, Span::detached());
+    }
 
-    if let Some(situation) = situation {
+    if !config.hanging_indent.is_zero() {
-        let first_line_indent = ParElem::first_line_indent_in(styles);
+        collector.push_item(Item::Absolute(-config.hanging_indent, false));
-        if !first_line_indent.amount.is_zero()
+        collector.spans.push(1, Span::detached());
-            && match situation {
-                // First-line indent for the first paragraph after a list bullet
-                // just looks bad.
-                ParSituation::First => first_line_indent.all && !in_list(styles),
-                ParSituation::Consecutive => true,
-                ParSituation::Other => first_line_indent.all,
-            }
-            && AlignElem::alignment_in(styles).resolve(styles).x
-                == outer_dir.start().into()
-        {
-            collector.push_item(Item::Absolute(
-                first_line_indent.amount.resolve(styles),
-                false,
-            ));
-            collector.spans.push(1, Span::detached());
-        }
-
-        let hang = ParElem::hanging_indent_in(styles);
-        if !hang.is_zero() {
-            collector.push_item(Item::Absolute(-hang, false));
-            collector.spans.push(1, Span::detached());
-        }
     }
 
     for &(child, styles) in children {
@@ -167,7 +145,7 @@ pub fn collect<'a>(
         } else if let Some(elem) = child.to_packed::<TextElem>() {
             collector.build_text(styles, |full| {
                 let dir = TextElem::dir_in(styles);
-                if dir != outer_dir {
+                if dir != config.dir {
                     // Insert "Explicit Directional Embedding".
                     match dir {
                         Dir::LTR => full.push_str(LTR_EMBEDDING),
@@ -182,7 +160,7 @@ pub fn collect<'a>(
                     full.push_str(&elem.text);
                 }
 
-                if dir != outer_dir {
+                if dir != config.dir {
                     // Insert "Pop Directional Formatting".
                     full.push_str(POP_EMBEDDING);
                 }
@@ -265,16 +243,6 @@ pub fn collect<'a>(
     Ok((collector.full, collector.segments, collector.spans))
 }
 
-/// Whether we have a list ancestor.
-///
-/// When we support some kind of more general ancestry mechanism, this can
-/// become more elegant.
-fn in_list(styles: StyleChain) -> bool {
-    ListElem::depth_in(styles).0 > 0
-        || !EnumElem::parents_in(styles).is_empty()
-        || TermsElem::within_in(styles)
-}
-
 /// Collects segments.
 struct Collector<'a> {
     full: String,

crates/typst-layout/src/inline/finalize.rs

@@ -9,7 +9,6 @@ pub fn finalize(
     engine: &mut Engine,
     p: &Preparation,
     lines: &[Line],
-    styles: StyleChain,
     region: Size,
     expand: bool,
     locator: &mut SplitLocator<'_>,
@@ -19,9 +18,10 @@ pub fn finalize(
     let width = if !region.x.is_finite()
         || (!expand && lines.iter().all(|line| line.fr().is_zero()))
     {
-        region
+        region.x.min(
-            .x
+            p.config.hanging_indent
-            .min(p.hang + lines.iter().map(|line| line.width).max().unwrap_or_default())
+                + lines.iter().map(|line| line.width).max().unwrap_or_default(),
+        )
     } else {
         region.x
     };
@@ -29,7 +29,7 @@ pub fn finalize(
     // Stack the lines into one frame per region.
     lines
         .iter()
-        .map(|line| commit(engine, p, line, width, region.y, locator, styles))
+        .map(|line| commit(engine, p, line, width, region.y, locator))
         .collect::<SourceResult<_>>()
         .map(Fragment::frames)
 }

crates/typst-layout/src/inline/line.rs

@@ -2,10 +2,9 @@ use std::fmt::{self, Debug, Formatter};
 use std::ops::{Deref, DerefMut};
 
 use typst_library::engine::Engine;
-use typst_library::foundations::NativeElement;
 use typst_library::introspection::{SplitLocator, Tag};
 use typst_library::layout::{Abs, Dir, Em, Fr, Frame, FrameItem, Point};
-use typst_library::model::{ParLine, ParLineMarker};
+use typst_library::model::ParLineMarker;
 use typst_library::text::{Lang, TextElem};
 use typst_utils::Numeric;
 
@@ -135,7 +134,7 @@ pub fn line<'a>(
 
     // Whether the line is justified.
     let justify = full.ends_with(LINE_SEPARATOR)
-        || (p.justify && breakpoint != Breakpoint::Mandatory);
+        || (p.config.justify && breakpoint != Breakpoint::Mandatory);
 
     // Process dashes.
     let dash = if breakpoint.is_hyphen() || full.ends_with(SHY) {
@@ -157,14 +156,14 @@ pub fn line<'a>(
     // Add a hyphen at the line start, if a previous dash should be repeated.
     if pred.map_or(false, |pred| should_repeat_hyphen(pred, full)) {
         if let Some(shaped) = items.first_text_mut() {
-            shaped.prepend_hyphen(engine, p.fallback);
+            shaped.prepend_hyphen(engine, p.config.fallback);
         }
     }
 
     // Add a hyphen at the line end, if we ended on a soft hyphen.
     if dash == Some(Dash::Soft) {
         if let Some(shaped) = items.last_text_mut() {
-            shaped.push_hyphen(engine, p.fallback);
+            shaped.push_hyphen(engine, p.config.fallback);
         }
     }
 
@@ -234,13 +233,13 @@ where
 {
     // If there is nothing bidirectional going on, skip reordering.
     let Some(bidi) = &p.bidi else {
-        f(range, p.dir == Dir::RTL);
+        f(range, p.config.dir == Dir::RTL);
         return;
     };
 
     // The bidi crate panics for empty lines.
     if range.is_empty() {
-        f(range, p.dir == Dir::RTL);
+        f(range, p.config.dir == Dir::RTL);
         return;
     }
 
@@ -308,13 +307,13 @@ fn collect_range<'a>(
 /// punctuation marks at line start or line end.
 fn adjust_cj_at_line_boundaries(p: &Preparation, text: &str, items: &mut Items) {
     if text.starts_with(BEGIN_PUNCT_PAT)
-        || (p.cjk_latin_spacing && text.starts_with(is_of_cj_script))
+        || (p.config.cjk_latin_spacing && text.starts_with(is_of_cj_script))
     {
         adjust_cj_at_line_start(p, items);
     }
 
     if text.ends_with(END_PUNCT_PAT)
-        || (p.cjk_latin_spacing && text.ends_with(is_of_cj_script))
+        || (p.config.cjk_latin_spacing && text.ends_with(is_of_cj_script))
     {
         adjust_cj_at_line_end(p, items);
     }
@@ -332,7 +331,10 @@ fn adjust_cj_at_line_start(p: &Preparation, items: &mut Items) {
         let shrink = glyph.shrinkability().0;
         glyph.shrink_left(shrink);
         shaped.width -= shrink.at(shaped.size);
-    } else if p.cjk_latin_spacing && glyph.is_cj_script() && glyph.x_offset > Em::zero() {
+    } else if p.config.cjk_latin_spacing
+        && glyph.is_cj_script()
+        && glyph.x_offset > Em::zero()
+    {
         // If the first glyph is a CJK character adjusted by
         // [`add_cjk_latin_spacing`], restore the original width.
         let glyph = shaped.glyphs.to_mut().first_mut().unwrap();
@@ -359,7 +361,7 @@ fn adjust_cj_at_line_end(p: &Preparation, items: &mut Items) {
         let punct = shaped.glyphs.to_mut().last_mut().unwrap();
         punct.shrink_right(shrink);
         shaped.width -= shrink.at(shaped.size);
-    } else if p.cjk_latin_spacing
+    } else if p.config.cjk_latin_spacing
         && glyph.is_cj_script()
         && (glyph.x_advance - glyph.x_offset) > Em::one()
     {
@@ -424,16 +426,15 @@ pub fn commit(
     width: Abs,
     full: Abs,
     locator: &mut SplitLocator<'_>,
-    styles: StyleChain,
 ) -> SourceResult<Frame> {
-    let mut remaining = width - line.width - p.hang;
+    let mut remaining = width - line.width - p.config.hanging_indent;
     let mut offset = Abs::zero();
 
     // We always build the line from left to right. In an LTR paragraph, we must
     // thus add the hanging indent to the offset. In an RTL paragraph, the
     // hanging indent arises naturally due to the line width.
-    if p.dir == Dir::LTR {
+    if p.config.dir == Dir::LTR {
-        offset += p.hang;
+        offset += p.config.hanging_indent;
     }
 
     // Handle hanging punctuation to the left.
@@ -554,11 +555,13 @@ pub fn commit(
     let mut output = Frame::soft(size);
     output.set_baseline(top);
 
-    add_par_line_marker(&mut output, styles, engine, locator, top);
+    if let Some(marker) = &p.config.numbering_marker {
+        add_par_line_marker(&mut output, marker, engine, locator, top);
+    }
 
     // Construct the line's frame.
     for (offset, frame) in frames {
-        let x = offset + p.align.position(remaining);
+        let x = offset + p.config.align.position(remaining);
         let y = top - frame.baseline();
         output.push_frame(Point::new(x, y), frame);
     }
@@ -575,26 +578,18 @@ pub fn commit(
 /// number in the margin, is aligned to the line's baseline.
 fn add_par_line_marker(
     output: &mut Frame,
-    styles: StyleChain,
+    marker: &Packed<ParLineMarker>,
     engine: &mut Engine,
     locator: &mut SplitLocator,
     top: Abs,
 ) {
-    let Some(numbering) = ParLine::numbering_in(styles) else { return };
-    let margin = ParLine::number_margin_in(styles);
-    let align = ParLine::number_align_in(styles);
-
-    // Delay resolving the number clearance until line numbers are laid out to
-    // avoid inconsistent spacing depending on varying font size.
-    let clearance = ParLine::number_clearance_in(styles);
-
     // Elements in tags must have a location for introspection to work. We do
     // the work here instead of going through all of the realization process
     // just for this, given we don't need to actually place the marker as we
     // manually search for it in the frame later (when building a root flow,
     // where line numbers can be displayed), so we just need it to be in a tag
     // and to be valid (to have a location).
-    let mut marker = ParLineMarker::new(numbering, align, margin, clearance).pack();
+    let mut marker = marker.clone();
     let key = typst_utils::hash128(&marker);
     let loc = locator.next_location(engine.introspector, key);
     marker.set_location(loc);
@@ -606,7 +601,7 @@ fn add_par_line_marker(
     // line's general baseline. However, the line number will still need to
     // manually adjust its own 'y' position based on its own baseline.
     let pos = Point::with_y(top);
-    output.push(pos, FrameItem::Tag(Tag::Start(marker)));
+    output.push(pos, FrameItem::Tag(Tag::Start(marker.pack())));
     output.push(pos, FrameItem::Tag(Tag::End(loc, key)));
 }
 

crates/typst-layout/src/inline/linebreak.rs

@@ -110,15 +110,7 @@ pub fn linebreak<'a>(
     p: &'a Preparation<'a>,
     width: Abs,
 ) -> Vec<Line<'a>> {
-    let linebreaks = p.linebreaks.unwrap_or_else(|| {
+    match p.config.linebreaks {
-        if p.justify {
-            Linebreaks::Optimized
-        } else {
-            Linebreaks::Simple
-        }
-    });
-
-    match linebreaks {
         Linebreaks::Simple => linebreak_simple(engine, p, width),
         Linebreaks::Optimized => linebreak_optimized(engine, p, width),
     }
@@ -384,7 +376,7 @@ fn linebreak_optimized_approximate(
 
             // Whether the line is justified. This is not 100% accurate w.r.t
             // to line()'s behaviour, but good enough.
-            let justify = p.justify && breakpoint != Breakpoint::Mandatory;
+            let justify = p.config.justify && breakpoint != Breakpoint::Mandatory;
 
             // We don't really know whether the line naturally ends with a dash
             // here, so we can miss that case, but it's ok, since all of this
@@ -573,7 +565,7 @@ fn raw_ratio(
         // calculate the extra amount. Also, don't divide by zero.
         let extra_stretch = (delta - adjustability) / justifiables.max(1) as f64;
         // Normalize the amount by half the em size.
-        ratio = 1.0 + extra_stretch / (p.size / 2.0);
+        ratio = 1.0 + extra_stretch / (p.config.font_size / 2.0);
     }
 
     // The min value must be < MIN_RATIO, but how much smaller doesn't matter
@@ -663,9 +655,9 @@ fn breakpoints(p: &Preparation, mut f: impl FnMut(usize, Breakpoint)) {
         return;
     }
 
-    let hyphenate = p.hyphenate != Some(false);
+    let hyphenate = p.config.hyphenate != Some(false);
     let lb = LINEBREAK_DATA.as_borrowed();
-    let segmenter = match p.lang {
+    let segmenter = match p.config.lang {
         Some(Lang::CHINESE | Lang::JAPANESE) => &CJ_SEGMENTER,
         _ => &SEGMENTER,
     };
@@ -830,18 +822,18 @@ fn linebreak_link(link: &str, mut f: impl FnMut(usize)) {
 
 /// Whether hyphenation is enabled at the given offset.
 fn hyphenate_at(p: &Preparation, offset: usize) -> bool {
-    p.hyphenate
+    p.config.hyphenate.unwrap_or_else(|| {
-        .or_else(|| {
+        let (_, item) = p.get(offset);
-            let (_, item) = p.get(offset);
+        match item.text() {
-            let styles = item.text()?.styles;
+            Some(text) => TextElem::hyphenate_in(text.styles).unwrap_or(p.config.justify),
-            Some(TextElem::hyphenate_in(styles))
+            None => false,
-        })
+        }
-        .unwrap_or(false)
+    })
 }
 
 /// The text language at the given offset.
 fn lang_at(p: &Preparation, offset: usize) -> Option<hypher::Lang> {
-    let lang = p.lang.or_else(|| {
+    let lang = p.config.lang.or_else(|| {
         let (_, item) = p.get(offset);
         let styles = item.text()?.styles;
         Some(TextElem::lang_in(styles))
@@ -865,13 +857,13 @@ impl CostMetrics {
     fn compute(p: &Preparation) -> Self {
         Self {
             // When justifying, we may stretch spaces below their natural width.
-            min_ratio: if p.justify { MIN_RATIO } else { 0.0 },
+            min_ratio: if p.config.justify { MIN_RATIO } else { 0.0 },
-            min_approx_ratio: if p.justify { MIN_APPROX_RATIO } else { 0.0 },
+            min_approx_ratio: if p.config.justify { MIN_APPROX_RATIO } else { 0.0 },
             // Approximate hyphen width for estimates.
-            approx_hyphen_width: Em::new(0.33).at(p.size),
+            approx_hyphen_width: Em::new(0.33).at(p.config.font_size),
             // Costs.
-            hyph_cost: DEFAULT_HYPH_COST * p.costs.hyphenation().get(),
+            hyph_cost: DEFAULT_HYPH_COST * p.config.costs.hyphenation().get(),
-            runt_cost: DEFAULT_RUNT_COST * p.costs.runt().get(),
+            runt_cost: DEFAULT_RUNT_COST * p.config.costs.runt().get(),
         }
     }
 

crates/typst-layout/src/inline/mod.rs

@@ -13,12 +13,17 @@ pub use self::box_::layout_box;
 use comemo::{Track, Tracked, TrackedMut};
 use typst_library::diag::SourceResult;
 use typst_library::engine::{Engine, Route, Sink, Traced};
-use typst_library::foundations::{Packed, StyleChain};
+use typst_library::foundations::{Packed, Resolve, Smart, StyleChain};
 use typst_library::introspection::{Introspector, Locator, LocatorLink, SplitLocator};
-use typst_library::layout::{Fragment, Size};
+use typst_library::layout::{Abs, AlignElem, Dir, FixedAlignment, Fragment, Size};
-use typst_library::model::ParElem;
+use typst_library::model::{
+    EnumElem, FirstLineIndent, Linebreaks, ListElem, ParElem, ParLine, ParLineMarker,
+    TermsElem,
+};
 use typst_library::routines::{Arenas, Pair, RealizationKind, Routines};
+use typst_library::text::{Costs, Lang, TextElem};
 use typst_library::World;
+use typst_utils::{Numeric, SliceExt};
 
 use self::collect::{collect, Item, Segment, SpanMapper};
 use self::deco::decorate;
@@ -98,7 +103,7 @@ fn layout_par_impl(
         styles,
     )?;
 
-    layout_inline(
+    layout_inline_impl(
         &mut engine,
         &children,
         &mut locator,
@@ -106,33 +111,134 @@ fn layout_par_impl(
         region,
         expand,
         Some(situation),
+        &ConfigBase {
+            justify: elem.justify(styles),
+            linebreaks: elem.linebreaks(styles),
+            first_line_indent: elem.first_line_indent(styles),
+            hanging_indent: elem.hanging_indent(styles),
+        },
     )
 }
 
 /// Lays out realized content with inline layout.
-#[allow(clippy::too_many_arguments)]
 pub fn layout_inline<'a>(
     engine: &mut Engine,
     children: &[Pair<'a>],
     locator: &mut SplitLocator<'a>,
-    styles: StyleChain<'a>,
+    shared: StyleChain<'a>,
+    region: Size,
+    expand: bool,
+) -> SourceResult<Fragment> {
+    layout_inline_impl(
+        engine,
+        children,
+        locator,
+        shared,
+        region,
+        expand,
+        None,
+        &ConfigBase {
+            justify: ParElem::justify_in(shared),
+            linebreaks: ParElem::linebreaks_in(shared),
+            first_line_indent: ParElem::first_line_indent_in(shared),
+            hanging_indent: ParElem::hanging_indent_in(shared),
+        },
+    )
+}
+
+/// The internal implementation of [`layout_inline`].
+#[allow(clippy::too_many_arguments)]
+fn layout_inline_impl<'a>(
+    engine: &mut Engine,
+    children: &[Pair<'a>],
+    locator: &mut SplitLocator<'a>,
+    shared: StyleChain<'a>,
     region: Size,
     expand: bool,
     par: Option<ParSituation>,
+    base: &ConfigBase,
 ) -> SourceResult<Fragment> {
+    // Prepare configuration that is shared across the whole inline layout.
+    let config = configuration(base, children, shared, par);
+
     // Collect all text into one string for BiDi analysis.
-    let (text, segments, spans) =
+    let (text, segments, spans) = collect(children, engine, locator, &config, region)?;
-        collect(children, engine, locator, styles, region, par)?;
 
     // Perform BiDi analysis and performs some preparation steps before we
     // proceed to line breaking.
-    let p = prepare(engine, children, &text, segments, spans, styles, par)?;
+    let p = prepare(engine, &config, &text, segments, spans)?;
 
     // Break the text into lines.
-    let lines = linebreak(engine, &p, region.x - p.hang);
+    let lines = linebreak(engine, &p, region.x - config.hanging_indent);
 
     // Turn the selected lines into frames.
-    finalize(engine, &p, &lines, styles, region, expand, locator)
+    finalize(engine, &p, &lines, region, expand, locator)
+}
+
+/// Determine the inline layout's configuration.
+fn configuration(
+    base: &ConfigBase,
+    children: &[Pair],
+    shared: StyleChain,
+    situation: Option<ParSituation>,
+) -> Config {
+    let justify = base.justify;
+    let font_size = TextElem::size_in(shared);
+    let dir = TextElem::dir_in(shared);
+
+    Config {
+        justify,
+        linebreaks: base.linebreaks.unwrap_or_else(|| {
+            if justify {
+                Linebreaks::Optimized
+            } else {
+                Linebreaks::Simple
+            }
+        }),
+        first_line_indent: {
+            let FirstLineIndent { amount, all } = base.first_line_indent;
+            if !amount.is_zero()
+                && match situation {
+                    // First-line indent for the first paragraph after a list
+                    // bullet just looks bad.
+                    Some(ParSituation::First) => all && !in_list(shared),
+                    Some(ParSituation::Consecutive) => true,
+                    Some(ParSituation::Other) => all,
+                    None => false,
+                }
+                && AlignElem::alignment_in(shared).resolve(shared).x == dir.start().into()
+            {
+                amount.at(font_size)
+            } else {
+                Abs::zero()
+            }
+        },
+        hanging_indent: if situation.is_some() {
+            base.hanging_indent
+        } else {
+            Abs::zero()
+        },
+        numbering_marker: ParLine::numbering_in(shared).map(|numbering| {
+            Packed::new(ParLineMarker::new(
+                numbering,
+                ParLine::number_align_in(shared),
+                ParLine::number_margin_in(shared),
+                // Delay resolving the number clearance until line numbers are
+                // laid out to avoid inconsistent spacing depending on varying
+                // font size.
+                ParLine::number_clearance_in(shared),
+            ))
+        }),
+        align: AlignElem::alignment_in(shared).fix(dir).x,
+        font_size,
+        dir,
+        hyphenate: shared_get(children, shared, TextElem::hyphenate_in)
+            .map(|uniform| uniform.unwrap_or(justify)),
+        lang: shared_get(children, shared, TextElem::lang_in),
+        fallback: TextElem::fallback_in(shared),
+        cjk_latin_spacing: TextElem::cjk_latin_spacing_in(shared).is_auto(),
+        costs: TextElem::costs_in(shared),
+    }
 }
 
 /// Distinguishes between a few different kinds of paragraphs.
@@ -148,3 +254,66 @@ pub enum ParSituation {
     /// Any other kind of paragraph.
     Other,
 }
+
+/// Raw values from a `ParElem` or style chain. Used to initialize a [`Config`].
+struct ConfigBase {
+    justify: bool,
+    linebreaks: Smart<Linebreaks>,
+    first_line_indent: FirstLineIndent,
+    hanging_indent: Abs,
+}
+
+/// Shared configuration for the whole inline layout.
+struct Config {
+    /// Whether to justify text.
+    justify: bool,
+    /// How to determine line breaks.
+    linebreaks: Linebreaks,
+    /// The indent the first line of a paragraph should have.
+    first_line_indent: Abs,
+    /// The indent that all but the first line of a paragraph should have.
+    hanging_indent: Abs,
+    /// Configuration for line numbering.
+    numbering_marker: Option<Packed<ParLineMarker>>,
+    /// The resolved horizontal alignment.
+    align: FixedAlignment,
+    /// The text size.
+    font_size: Abs,
+    /// The dominant direction.
+    dir: Dir,
+    /// A uniform hyphenation setting (only `Some(_)` if it's the same for all
+    /// children, otherwise `None`).
+    hyphenate: Option<bool>,
+    /// The text language (only `Some(_)` if it's the same for all
+    /// children, otherwise `None`).
+    lang: Option<Lang>,
+    /// Whether font fallback is enabled.
+    fallback: bool,
+    /// Whether to add spacing between CJK and Latin characters.
+    cjk_latin_spacing: bool,
+    /// Costs for various layout decisions.
+    costs: Costs,
+}
+
+/// Get a style property, but only if it is the same for all of the children.
+fn shared_get<T: PartialEq>(
+    children: &[Pair],
+    styles: StyleChain<'_>,
+    getter: fn(StyleChain) -> T,
+) -> Option<T> {
+    let value = getter(styles);
+    children
+        .group_by_key(|&(_, s)| s)
+        .all(|(s, _)| getter(s) == value)
+        .then_some(value)
+}
+
+/// Whether we have a list ancestor.
+///
+/// When we support some kind of more general ancestry mechanism, this can
+/// become more elegant.
+fn in_list(styles: StyleChain) -> bool {
+    ListElem::depth_in(styles).0 > 0
+        || !EnumElem::parents_in(styles).is_empty()
+        || TermsElem::within_in(styles)
+}

crates/typst-layout/src/inline/prepare.rs

@@ -1,9 +1,4 @@
-use typst_library::foundations::{Resolve, Smart};
+use typst_library::layout::{Dir, Em};
-use typst_library::layout::{Abs, AlignElem, Dir, Em, FixedAlignment};
-use typst_library::model::Linebreaks;
-use typst_library::routines::Pair;
-use typst_library::text::{Costs, Lang, TextElem};
-use typst_utils::SliceExt;
 use unicode_bidi::{BidiInfo, Level as BidiLevel};
 
 use super::*;
@@ -17,6 +12,8 @@ use super::*;
 pub struct Preparation<'a> {
     /// The full text.
     pub text: &'a str,
+    /// Configuration for inline layout.
+    pub config: &'a Config,
     /// Bidirectional text embedding levels.
     ///
     /// This is `None` if all text directions are uniform (all the base
@@ -28,28 +25,6 @@ pub struct Preparation<'a> {
     pub indices: Vec<usize>,
     /// The span mapper.
     pub spans: SpanMapper,
-    /// Whether to hyphenate if it's the same for all children.
-    pub hyphenate: Option<bool>,
-    /// Costs for various layout decisions.
-    pub costs: Costs,
-    /// The dominant direction.
-    pub dir: Dir,
-    /// The text language if it's the same for all children.
-    pub lang: Option<Lang>,
-    /// The resolved horizontal alignment.
-    pub align: FixedAlignment,
-    /// Whether to justify text.
-    pub justify: bool,
-    /// Hanging indent to apply.
-    pub hang: Abs,
-    /// Whether to add spacing between CJK and Latin characters.
-    pub cjk_latin_spacing: bool,
-    /// Whether font fallback is enabled.
-    pub fallback: bool,
-    /// How to determine line breaks.
-    pub linebreaks: Smart<Linebreaks>,
-    /// The text size.
-    pub size: Abs,
 }
 
 impl<'a> Preparation<'a> {
@@ -80,15 +55,12 @@ impl<'a> Preparation<'a> {
 #[typst_macros::time]
 pub fn prepare<'a>(
     engine: &mut Engine,
-    children: &[Pair<'a>],
+    config: &'a Config,
     text: &'a str,
     segments: Vec<Segment<'a>>,
     spans: SpanMapper,
-    styles: StyleChain<'a>,
-    situation: Option<ParSituation>,
 ) -> SourceResult<Preparation<'a>> {
-    let dir = TextElem::dir_in(styles);
+    let default_level = match config.dir {
-    let default_level = match dir {
         Dir::RTL => BidiLevel::rtl(),
         _ => BidiLevel::ltr(),
     };
@@ -124,51 +96,20 @@ pub fn prepare<'a>(
         indices.extend(range.clone().map(|_| i));
     }
 
-    let cjk_latin_spacing = TextElem::cjk_latin_spacing_in(styles).is_auto();
+    if config.cjk_latin_spacing {
-    if cjk_latin_spacing {
         add_cjk_latin_spacing(&mut items);
     }
 
-    // Only apply hanging indent to real paragraphs.
-    let hang = if situation.is_some() {
-        ParElem::hanging_indent_in(styles)
-    } else {
-        Abs::zero()
-    };
-
     Ok(Preparation {
+        config,
         text,
         bidi: is_bidi.then_some(bidi),
         items,
         indices,
         spans,
-        hyphenate: shared_get(children, styles, TextElem::hyphenate_in),
-        costs: TextElem::costs_in(styles),
-        dir,
-        lang: shared_get(children, styles, TextElem::lang_in),
-        align: AlignElem::alignment_in(styles).resolve(styles).x,
-        justify: ParElem::justify_in(styles),
-        hang,
-        cjk_latin_spacing,
-        fallback: TextElem::fallback_in(styles),
-        linebreaks: ParElem::linebreaks_in(styles),
-        size: TextElem::size_in(styles),
     })
 }
 
-/// Get a style property, but only if it is the same for all of the children.
-fn shared_get<T: PartialEq>(
-    children: &[Pair],
-    styles: StyleChain<'_>,
-    getter: fn(StyleChain) -> T,
-) -> Option<T> {
-    let value = getter(styles);
-    children
-        .group_by_key(|&(_, s)| s)
-        .all(|(s, _)| getter(s) == value)
-        .then_some(value)
-}
-
 /// Add some spacing between Han characters and western characters. See
 /// Requirements for Chinese Text Layout, Section 3.2.2 Mixed Text Composition
 /// in Horizontal Written Mode

crates/typst-layout/src/math/text.rs

@@ -107,7 +107,6 @@ fn layout_inline_text(
             styles,
             Size::splat(Abs::inf()),
             false,
-            None,
         )?
         .into_frame();
 

crates/typst-library/src/model/link.rs

@@ -11,7 +11,7 @@ use crate::foundations::{
 use crate::html::{attr, tag, HtmlElem};
 use crate::introspection::Location;
 use crate::layout::Position;
-use crate::text::{Hyphenate, TextElem};
+use crate::text::TextElem;
 
 /// Links to a URL or a location in the document.
 ///
@@ -138,7 +138,7 @@ impl Show for Packed<LinkElem> {
 impl ShowSet for Packed<LinkElem> {
     fn show_set(&self, _: StyleChain) -> Styles {
         let mut out = Styles::new();
-        out.set(TextElem::set_hyphenate(Hyphenate(Smart::Custom(false))));
+        out.set(TextElem::set_hyphenate(Smart::Custom(false)));
         out
     }
 }

crates/typst-library/src/text/mod.rs

@@ -51,7 +51,6 @@ use crate::foundations::{
 };
 use crate::layout::{Abs, Axis, Dir, Em, Length, Ratio, Rel};
 use crate::math::{EquationElem, MathSize};
-use crate::model::ParElem;
 use crate::visualize::{Color, Paint, RelativeTo, Stroke};
 use crate::World;
 
@@ -504,9 +503,8 @@ pub struct TextElem {
     /// enabling hyphenation can
     /// improve justification.
     /// ```
-    #[resolve]
     #[ghost]
-    pub hyphenate: Hyphenate,
+    pub hyphenate: Smart<bool>,
 
     /// The "cost" of various choices when laying out text. A higher cost means
     /// the layout engine will make the choice less often. Costs are specified
@@ -1110,27 +1108,6 @@ impl Resolve for TextDir {
     }
 }
 
-/// Whether to hyphenate text.
-#[derive(Debug, Default, Copy, Clone, Eq, PartialEq, Hash)]
-pub struct Hyphenate(pub Smart<bool>);
-
-cast! {
-    Hyphenate,
-    self => self.0.into_value(),
-    v: Smart<bool> => Self(v),
-}
-
-impl Resolve for Hyphenate {
-    type Output = bool;
-
-    fn resolve(self, styles: StyleChain) -> Self::Output {
-        match self.0 {
-            Smart::Auto => ParElem::justify_in(styles),
-            Smart::Custom(v) => v,
-        }
-    }
-}
-
 /// A set of stylistic sets to enable.
 #[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub struct StylisticSets(u32);

crates/typst-library/src/text/raw.rs

@@ -21,9 +21,7 @@ use crate::html::{tag, HtmlElem};
 use crate::layout::{BlockBody, BlockElem, Em, HAlignment};
 use crate::loading::{DataSource, Load};
 use crate::model::{Figurable, ParElem};
-use crate::text::{
+use crate::text::{FontFamily, FontList, LinebreakElem, LocalName, TextElem, TextSize};
-    FontFamily, FontList, Hyphenate, LinebreakElem, LocalName, TextElem, TextSize,
-};
 use crate::visualize::Color;
 use crate::World;
 
@@ -472,7 +470,7 @@ impl ShowSet for Packed<RawElem> {
         let mut out = Styles::new();
         out.set(TextElem::set_overhang(false));
         out.set(TextElem::set_lang(Lang::ENGLISH));
-        out.set(TextElem::set_hyphenate(Hyphenate(Smart::Custom(false))));
+        out.set(TextElem::set_hyphenate(Smart::Custom(false)));
         out.set(TextElem::set_size(TextSize(Em::new(0.8).into())));
         out.set(TextElem::set_font(FontList(vec![FontFamily::new("DejaVu Sans Mono")])));
         out.set(TextElem::set_cjk_latin_spacing(Smart::Custom(None)));

tests/suite/model/par.typ

@@ -322,6 +322,20 @@ A
 
 #context test(query(<a>).len(), 1)
 
+--- issue-5831-par-constructor-args ---
+// Make sure that all arguments are also respected in the constructor.
+A
+#par(
+  leading: 2pt,
+  spacing: 20pt,
+  justify: true,
+  linebreaks: "simple",
+  first-line-indent: (amount: 1em, all: true),
+  hanging-indent: 5pt,
+)[
+  The par function has a constructor and justification.
+]
+
 --- show-par-set-block-hint ---
 // Warning: 2-36 `show par: set block(spacing: ..)` has no effect anymore
 // Hint: 2-36 this is specific to paragraphs as they are not considered blocks anymore