Merge 4aa6dcf578ce3fde6209369c358bde012150146c into 627f5b9d4f39f91affc529f276bb500d42887dae

crates/typst-html/src/rules.rs

@@ -14,8 +14,8 @@ use typst_library::model::{
     RefElem, StrongElem, TableCell, TableElem, TermsElem,
 };
 use typst_library::text::{
-    HighlightElem, LinebreakElem, OverlineElem, RawElem, RawLine, SpaceElem, StrikeElem,
+    HighlightElem, LinebreakElem, OverlineElem, RawElem, RawLine, SmallcapsElem,
-    SubElem, SuperElem, UnderlineElem,
+    SpaceElem, StrikeElem, SubElem, SuperElem, UnderlineElem,
 };
 use typst_library::visualize::ImageElem;
 
@@ -47,6 +47,7 @@ pub fn register(rules: &mut NativeRuleMap) {
     rules.register(Html, OVERLINE_RULE);
     rules.register(Html, STRIKE_RULE);
     rules.register(Html, HIGHLIGHT_RULE);
+    rules.register(Html, SMALLCAPS_RULE);
     rules.register(Html, RAW_RULE);
     rules.register(Html, RAW_LINE_RULE);
 
@@ -390,6 +391,20 @@ const STRIKE_RULE: ShowFn<StrikeElem> =
 const HIGHLIGHT_RULE: ShowFn<HighlightElem> =
     |elem, _, _| Ok(HtmlElem::new(tag::mark).with_body(Some(elem.body.clone())).pack());
 
+const SMALLCAPS_RULE: ShowFn<SmallcapsElem> = |elem, _, styles| {
+    Ok(HtmlElem::new(tag::span)
+        .with_attr(
+            attr::style,
+            if elem.all.get(styles) {
+                "font-variant-caps: all-small-caps"
+            } else {
+                "font-variant-caps: small-caps"
+            },
+        )
+        .with_body(Some(elem.body.clone()))
+        .pack())
+};
+
 const RAW_RULE: ShowFn<RawElem> = |elem, _, styles| {
     let lines = elem.lines.as_deref().unwrap_or_default();
 

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

@@ -9,6 +9,7 @@ use ttf_parser::Tag;
 use typst_library::engine::Engine;
 use typst_library::foundations::{Smart, StyleChain};
 use typst_library::layout::{Abs, Dir, Em, Frame, FrameItem, Point, Size};
+use typst_library::model::{Microtype, ParElem};
 use typst_library::text::{
     families, features, is_default_ignorable, language, variant, Font, FontFamily,
     FontVariant, Glyph, Lang, Region, ShiftSettings, TextEdgeBounds, TextElem, TextItem,
@@ -144,7 +145,11 @@ impl ShapedGlyph {
             || self.c.is_ascii_digit()
     }
 
-    pub fn base_adjustability(&self, style: CjkPunctStyle) -> Adjustability {
+    pub fn base_adjustability(
+        &self,
+        style: CjkPunctStyle,
+        microtype: Microtype,
+    ) -> Adjustability {
         let width = self.x_advance;
         if self.is_space() {
             Adjustability {
@@ -168,7 +173,10 @@ impl ShapedGlyph {
                 shrinkability: (width / 4.0, width / 4.0),
             }
         } else {
-            Adjustability::default()
+            Adjustability {
+                stretchability: (Em::zero(), microtype.max_expand.em),
+                shrinkability: (Em::zero(), microtype.max_retract.em),
+            }
         }
     }
 
@@ -1110,9 +1118,10 @@ fn track_and_space(ctx: &mut ShapingContext) {
 /// and CJK punctuation adjustments according to Chinese Layout Requirements.
 fn calculate_adjustability(ctx: &mut ShapingContext, lang: Lang, region: Option<Region>) {
     let style = cjk_punct_style(lang, region);
+    let microtype = ParElem::microtype_in(ctx.styles);
 
     for glyph in &mut ctx.glyphs {
-        glyph.adjustability = glyph.base_adjustability(style);
+        glyph.adjustability = glyph.base_adjustability(style, microtype);
     }
 
     let mut glyphs = ctx.glyphs.iter_mut().peekable();

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

@@ -136,6 +136,9 @@ pub struct ParElem {
     #[default(false)]
     pub justify: bool,
 
+    /// Microtypographical settings that are used during justification.
+    pub microtype: Microtype,
+
     /// How to determine line breaks.
     ///
     /// When this property is set to `{auto}`, its default value, optimized line
@@ -224,6 +227,36 @@ impl ParElem {
     type ParLine;
 }
 
+/// Configuration for microtypographical settings to be used during
+/// justification.
+#[derive(Debug, Default, Copy, Clone, PartialEq, Hash)]
+pub struct Microtype {
+    /// How much a glyph is allowed to translate into its neighbor.
+    pub max_retract: Length,
+    /// How much a glyph is allowed to translate away from its neighbor.
+    pub max_expand: Length,
+}
+
+cast! {
+    Microtype,
+    self => Value::Dict(self.into()),
+    mut dict: Dict => {
+        let max_retract = dict.take("max-retract")?.cast()?;
+        let max_expand = dict.take("max-expand")?.cast()?;
+        dict.finish(&["max-retract", "max-expand"])?;
+        Self { max_retract, max_expand }
+    },
+}
+
+impl From<Microtype> for Dict {
+    fn from(microtype: Microtype) -> Self {
+        dict! {
+            "max-retract" => microtype.max_retract,
+            "max-expand" => microtype.max_expand,
+        }
+    }
+}
+
 /// How to determine line breaks in a paragraph.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash, Cast)]
 pub enum Linebreaks {

tests/ref/html/smallcaps-all.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+  </head>
+  <body>
+    <p><span style="font-variant-caps: small-caps">Test 012</span><br><span style="font-variant-caps: all-small-caps">Test 012</span></p>
+  </body>
+</html>

tests/suite/text/smallcaps.typ

@@ -11,6 +11,6 @@
 #show smallcaps: set text(fill: red)
 #smallcaps[Smallcaps]
 
---- smallcaps-all ---
+--- smallcaps-all render html ---
 #smallcaps(all: false)[Test 012] \
 #smallcaps(all: true)[Test 012]