Merge 61ce99fa386baffeff55895547a5441b7db51e66 into ac77fdbb6ee9c4a33813a75e056cb5953d14b1db

From https://github.com/typst/typst/pull/6543#issuecomment-3052557236

Cargo.lock

@@ -413,7 +413,7 @@ dependencies = [
 [[package]]
 name = "codex"
 version = "0.1.1"
-source = "git+https://github.com/typst/codex?rev=a5428cb#a5428cb9c81a41354d44b44dbd5a16a710bbd928"
+source = "git+https://github.com/typst/codex?rev=9ac86f9#9ac86f96af5b89fce555e6bba8b6d1ac7b44ef00"
 
 [[package]]
 name = "color-print"
@@ -2861,7 +2861,7 @@ dependencies = [
 [[package]]
 name = "typst-assets"
 version = "0.13.1"
-source = "git+https://github.com/typst/typst-assets?rev=c1089b4#c1089b46c461bdde579c55caa941a3cc7dec3e8a"
+source = "git+https://github.com/typst/typst-assets?rev=edf0d64#edf0d648376e29738a05a933af9ea99bb81557b1"
 
 [[package]]
 name = "typst-cli"
@@ -3032,6 +3032,7 @@ version = "0.13.1"
 dependencies = [
  "az",
  "bumpalo",
+ "codex",
  "comemo",
  "ecow",
  "hypher",

Cargo.toml

@@ -32,7 +32,7 @@ typst-svg = { path = "crates/typst-svg", version = "0.13.1" }
 typst-syntax = { path = "crates/typst-syntax", version = "0.13.1" }
 typst-timing = { path = "crates/typst-timing", version = "0.13.1" }
 typst-utils = { path = "crates/typst-utils", version = "0.13.1" }
-typst-assets = { git = "https://github.com/typst/typst-assets", rev = "c1089b4" }
+typst-assets = { git = "https://github.com/typst/typst-assets", rev = "edf0d64" }
 typst-dev-assets = { git = "https://github.com/typst/typst-dev-assets", rev = "bfa947f" }
 arrayvec = "0.7.4"
 az = "1.2"
@@ -47,7 +47,7 @@ clap = { version = "4.4", features = ["derive", "env", "wrap_help"] }
 clap_complete = "4.2.1"
 clap_mangen = "0.2.10"
 codespan-reporting = "0.11"
-codex = { git = "https://github.com/typst/codex", rev = "a5428cb" }
+codex = { git = "https://github.com/typst/codex", rev = "9ac86f9" }
 color-print = "0.3.6"
 comemo = "0.4"
 csv = "1"

crates/typst-html/src/css.rs

@@ -1,11 +1,72 @@
 //! Conversion from Typst data types into CSS data types.
 
-use std::fmt::{self, Display};
+use std::fmt::{self, Display, Write};
 
-use typst_library::layout::Length;
+use ecow::EcoString;
+use typst_library::html::{attr, HtmlElem};
+use typst_library::layout::{Length, Rel};
 use typst_library::visualize::{Color, Hsl, LinearRgb, Oklab, Oklch, Rgb};
 use typst_utils::Numeric;
 
+/// Additional methods for [`HtmlElem`].
+pub trait HtmlElemExt {
+    /// Adds the styles to an element if the property list is non-empty.
+    fn with_styles(self, properties: Properties) -> Self;
+}
+
+impl HtmlElemExt for HtmlElem {
+    /// Adds CSS styles to an element.
+    fn with_styles(self, properties: Properties) -> Self {
+        if let Some(value) = properties.into_inline_styles() {
+            self.with_attr(attr::style, value)
+        } else {
+            self
+        }
+    }
+}
+
+/// A list of CSS properties with values.
+#[derive(Debug, Default)]
+pub struct Properties(EcoString);
+
+impl Properties {
+    /// Creates an empty list.
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// Adds a new property to the list.
+    pub fn push(&mut self, property: &str, value: impl Display) {
+        if !self.0.is_empty() {
+            self.0.push_str("; ");
+        }
+        write!(&mut self.0, "{property}: {value}").unwrap();
+    }
+
+    /// Adds a new property in builder-style.
+    #[expect(unused)]
+    pub fn with(mut self, property: &str, value: impl Display) -> Self {
+        self.push(property, value);
+        self
+    }
+
+    /// Turns this into a string suitable for use as an inline `style`
+    /// attribute.
+    pub fn into_inline_styles(self) -> Option<EcoString> {
+        (!self.0.is_empty()).then_some(self.0)
+    }
+}
+
+pub fn rel(rel: Rel) -> impl Display {
+    typst_utils::display(move |f| match (rel.abs.is_zero(), rel.rel.is_zero()) {
+        (false, false) => {
+            write!(f, "calc({}% + {})", rel.rel.get(), length(rel.abs))
+        }
+        (true, false) => write!(f, "{}%", rel.rel.get()),
+        (_, true) => write!(f, "{}", length(rel.abs)),
+    })
+}
+
 pub fn length(length: Length) -> impl Display {
     typst_utils::display(move |f| match (length.abs.is_zero(), length.em.is_zero()) {
         (false, false) => {

crates/typst-html/src/rules.rs

@@ -3,12 +3,12 @@ use std::num::NonZeroUsize;
 use ecow::{eco_format, EcoVec};
 use typst_library::diag::warning;
 use typst_library::foundations::{
-    Content, NativeElement, NativeRuleMap, ShowFn, StyleChain, Target,
+    Content, NativeElement, NativeRuleMap, ShowFn, Smart, StyleChain, Target,
 };
 use typst_library::html::{attr, tag, HtmlAttrs, HtmlElem, HtmlTag};
 use typst_library::introspection::{Counter, Locator};
 use typst_library::layout::resolve::{table_to_cellgrid, Cell, CellGrid, Entry};
-use typst_library::layout::OuterVAlignment;
+use typst_library::layout::{OuterVAlignment, Sizing};
 use typst_library::model::{
     Attribution, CiteElem, CiteGroup, Destination, EmphElem, EnumElem, FigureCaption,
     FigureElem, HeadingElem, LinkElem, LinkTarget, ListElem, ParbreakElem, QuoteElem,
@@ -18,6 +18,9 @@ use typst_library::text::{
     HighlightElem, LinebreakElem, OverlineElem, RawElem, RawLine, SpaceElem, StrikeElem,
     SubElem, SuperElem, UnderlineElem,
 };
+use typst_library::visualize::ImageElem;
+
+use crate::css::{self, HtmlElemExt};
 
 /// Register show rules for the [HTML target](Target::Html).
 pub fn register(rules: &mut NativeRuleMap) {
@@ -47,6 +50,9 @@ pub fn register(rules: &mut NativeRuleMap) {
     rules.register(Html, HIGHLIGHT_RULE);
     rules.register(Html, RAW_RULE);
     rules.register(Html, RAW_LINE_RULE);
+
+    // Visualize.
+    rules.register(Html, IMAGE_RULE);
 }
 
 const STRONG_RULE: ShowFn<StrongElem> = |elem, _, _| {
@@ -338,7 +344,7 @@ fn show_cellgrid(grid: CellGrid, styles: StyleChain) -> Content {
 fn show_cell(tag: HtmlTag, cell: &Cell, styles: StyleChain) -> Content {
     let cell = cell.body.clone();
     let Some(cell) = cell.to_packed::<TableCell>() else { return cell };
-    let mut attrs = HtmlAttrs::default();
+    let mut attrs = HtmlAttrs::new();
     let span = |n: NonZeroUsize| (n != NonZeroUsize::MIN).then(|| n.to_string());
     if let Some(colspan) = span(cell.colspan.get(styles)) {
         attrs.push(attr::colspan, colspan);
@@ -409,3 +415,36 @@ const RAW_RULE: ShowFn<RawElem> = |elem, _, styles| {
 };
 
 const RAW_LINE_RULE: ShowFn<RawLine> = |elem, _, _| Ok(elem.body.clone());
+
+const IMAGE_RULE: ShowFn<ImageElem> = |elem, engine, styles| {
+    let image = elem.decode(engine, styles)?;
+
+    let mut attrs = HtmlAttrs::new();
+    attrs.push(attr::src, typst_svg::convert_image_to_base64_url(&image));
+
+    if let Some(alt) = elem.alt.get_cloned(styles) {
+        attrs.push(attr::alt, alt);
+    }
+
+    let mut inline = css::Properties::new();
+
+    // TODO: Exclude in semantic profile.
+    if let Some(value) = typst_svg::convert_image_scaling(image.scaling()) {
+        inline.push("image-rendering", value);
+    }
+
+    // TODO: Exclude in semantic profile?
+    match elem.width.get(styles) {
+        Smart::Auto => {}
+        Smart::Custom(rel) => inline.push("width", css::rel(rel)),
+    }
+
+    // TODO: Exclude in semantic profile?
+    match elem.height.get(styles) {
+        Sizing::Auto => {}
+        Sizing::Rel(rel) => inline.push("height", css::rel(rel)),
+        Sizing::Fr(_) => {}
+    }
+
+    Ok(HtmlElem::new(tag::img).with_attrs(attrs).with_styles(inline).pack())
+};

crates/typst-ide/src/analyze.rs

@@ -2,7 +2,7 @@ use comemo::Track;
 use ecow::{eco_vec, EcoString, EcoVec};
 use typst::foundations::{Label, Styles, Value};
 use typst::layout::PagedDocument;
-use typst::model::BibliographyElem;
+use typst::model::{BibliographyElem, FigureElem};
 use typst::syntax::{ast, LinkedNode, SyntaxKind};
 
 use crate::IdeWorld;
@@ -75,8 +75,13 @@ pub fn analyze_labels(
     for elem in document.introspector.all() {
         let Some(label) = elem.label() else { continue };
         let details = elem
-            .get_by_name("caption")
-            .or_else(|_| elem.get_by_name("body"))
+            .to_packed::<FigureElem>()
+            .and_then(|figure| match figure.caption.as_option() {
+                Some(Some(caption)) => Some(caption.pack_ref()),
+                _ => None,
+            })
+            .unwrap_or(elem)
+            .get_by_name("body")
             .ok()
             .and_then(|field| match field {
                 Value::Content(content) => Some(content),

crates/typst-ide/src/tooltip.rs

@@ -378,4 +378,9 @@ mod tests {
             .with_source("other.typ", "#let f = (x) => 1");
         test(&world, -4, Side::After).must_be_code("(..) => ..");
     }
+
+    #[test]
+    fn test_tooltip_reference() {
+        test("#figure(caption: [Hi])[]<f> @f", -1, Side::Before).must_be_text("Hi");
+    }
 }

crates/typst-layout/Cargo.toml

@@ -21,6 +21,7 @@ typst-timing = { workspace = true }
 typst-utils = { workspace = true }
 az = { workspace = true }
 bumpalo = { workspace = true }
+codex = { workspace = true }
 comemo = { workspace = true }
 ecow = { workspace = true }
 hypher = { workspace = true }

crates/typst-layout/src/image.rs

@@ -1,18 +1,11 @@
-use std::ffi::OsStr;
-
-use typst_library::diag::{warning, At, LoadedWithin, SourceResult, StrResult};
+use typst_library::diag::SourceResult;
 use typst_library::engine::Engine;
-use typst_library::foundations::{Bytes, Derived, Packed, Smart, StyleChain};
+use typst_library::foundations::{Packed, StyleChain};
 use typst_library::introspection::Locator;
 use typst_library::layout::{
     Abs, Axes, FixedAlignment, Frame, FrameItem, Point, Region, Size,
 };
-use typst_library::loading::DataSource;
-use typst_library::text::families;
-use typst_library::visualize::{
-    Curve, ExchangeFormat, Image, ImageElem, ImageFit, ImageFormat, ImageKind,
-    RasterImage, SvgImage, VectorFormat,
-};
+use typst_library::visualize::{Curve, Image, ImageElem, ImageFit};
 
 /// Layout the image.
 #[typst_macros::time(span = elem.span())]
@@ -23,53 +16,7 @@ pub fn layout_image(
     styles: StyleChain,
     region: Region,
 ) -> SourceResult<Frame> {
-    let span = elem.span();
-
-    // Take the format that was explicitly defined, or parse the extension,
-    // or try to detect the format.
-    let Derived { source, derived: loaded } = &elem.source;
-    let format = match elem.format.get(styles) {
-        Smart::Custom(v) => v,
-        Smart::Auto => determine_format(source, &loaded.data).at(span)?,
-    };
-
-    // Warn the user if the image contains a foreign object. Not perfect
-    // because the svg could also be encoded, but that's an edge case.
-    if format == ImageFormat::Vector(VectorFormat::Svg) {
-        let has_foreign_object =
-            memchr::memmem::find(&loaded.data, b"<foreignObject").is_some();
-
-        if has_foreign_object {
-            engine.sink.warn(warning!(
-                span,
-                "image contains foreign object";
-                hint: "SVG images with foreign objects might render incorrectly in typst";
-                hint: "see https://github.com/typst/typst/issues/1421 for more information"
-            ));
-        }
-    }
-
-    // Construct the image itself.
-    let kind = match format {
-        ImageFormat::Raster(format) => ImageKind::Raster(
-            RasterImage::new(
-                loaded.data.clone(),
-                format,
-                elem.icc.get_ref(styles).as_ref().map(|icc| icc.derived.clone()),
-            )
-            .at(span)?,
-        ),
-        ImageFormat::Vector(VectorFormat::Svg) => ImageKind::Svg(
-            SvgImage::with_fonts(
-                loaded.data.clone(),
-                engine.world,
-                &families(styles).map(|f| f.as_str()).collect::<Vec<_>>(),
-            )
-            .within(loaded)?,
-        ),
-    };
-
-    let image = Image::new(kind, elem.alt.get_cloned(styles), elem.scaling.get(styles));
+    let image = elem.decode(engine, styles)?;
 
     // Determine the image's pixel aspect ratio.
     let pxw = image.width();
@@ -122,7 +69,7 @@ pub fn layout_image(
     // the frame to the target size, center aligning the image in the
     // process.
     let mut frame = Frame::soft(fitted);
-    frame.push(Point::zero(), FrameItem::Image(image, fitted, span));
+    frame.push(Point::zero(), FrameItem::Image(image, fitted, elem.span()));
     frame.resize(target, Axes::splat(FixedAlignment::Center));
 
     // Create a clipping group if only part of the image should be visible.
@@ -132,25 +79,3 @@ pub fn layout_image(
 
     Ok(frame)
 }
-
-/// Try to determine the image format based on the data.
-fn determine_format(source: &DataSource, data: &Bytes) -> StrResult<ImageFormat> {
-    if let DataSource::Path(path) = source {
-        let ext = std::path::Path::new(path.as_str())
-            .extension()
-            .and_then(OsStr::to_str)
-            .unwrap_or_default()
-            .to_lowercase();
-
-        match ext.as_str() {
-            "png" => return Ok(ExchangeFormat::Png.into()),
-            "jpg" | "jpeg" => return Ok(ExchangeFormat::Jpg.into()),
-            "gif" => return Ok(ExchangeFormat::Gif.into()),
-            "svg" | "svgz" => return Ok(VectorFormat::Svg.into()),
-            "webp" => return Ok(ExchangeFormat::Webp.into()),
-            _ => {}
-        }
-    }
-
-    Ok(ImageFormat::detect(data).ok_or("unknown image format")?)
-}

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

@@ -1,10 +1,11 @@
 use std::f64::consts::SQRT_2;
 
+use codex::styling::{to_style, MathStyle};
 use ecow::EcoString;
 use typst_library::diag::SourceResult;
 use typst_library::foundations::{Packed, StyleChain, SymbolElem};
 use typst_library::layout::{Abs, Size};
-use typst_library::math::{EquationElem, MathSize, MathVariant};
+use typst_library::math::{EquationElem, MathSize};
 use typst_library::text::{
     BottomEdge, BottomEdgeMetric, TextElem, TopEdge, TopEdgeMetric,
 };
@@ -64,12 +65,21 @@ fn layout_inline_text(
     ctx: &mut MathContext,
     styles: StyleChain,
 ) -> SourceResult<FrameFragment> {
+    let variant = styles.get(EquationElem::variant);
+    let bold = styles.get(EquationElem::bold);
+    // Disable auto-italic.
+    let italic = styles.get(EquationElem::italic).or(Some(false));
+
     if text.chars().all(|c| c.is_ascii_digit() || c == '.') {
         // Small optimization for numbers. Note that this lays out slightly
         // differently to normal text and is worth re-evaluating in the future.
         let mut fragments = vec![];
         for unstyled_c in text.chars() {
-            let c = styled_char(styles, unstyled_c, false);
+            // This is fine as ascii digits and '.' can never end up as more
+            // than a single char after styling.
+            let style = MathStyle::select(unstyled_c, variant, bold, italic);
+            let c = to_style(unstyled_c, style).next().unwrap();
+
             let glyph = GlyphFragment::new_char(ctx.font, styles, c, span)?;
             fragments.push(glyph.into());
         }
@@ -83,8 +93,10 @@ fn layout_inline_text(
         .map(|p| p.wrap());
 
         let styles = styles.chain(&local);
-        let styled_text: EcoString =
-            text.chars().map(|c| styled_char(styles, c, false)).collect();
+        let styled_text: EcoString = text
+            .chars()
+            .flat_map(|c| to_style(c, MathStyle::select(c, variant, bold, italic)))
+            .collect();
 
         let spaced = styled_text.graphemes(true).nth(1).is_some();
         let elem = TextElem::packed(styled_text).spanned(span);
@@ -124,9 +136,16 @@ pub fn layout_symbol(
         Some(c) if has_dtls_feat(ctx.font) => (c, styles.chain(&dtls)),
         _ => (elem.text, styles),
     };
-    let c = styled_char(styles, unstyled_c, true);
+
+    let variant = styles.get(EquationElem::variant);
+    let bold = styles.get(EquationElem::bold);
+    let italic = styles.get(EquationElem::italic);
+
+    let style = MathStyle::select(unstyled_c, variant, bold, italic);
+    let text: EcoString = to_style(unstyled_c, style).collect();
+
     let fragment: MathFragment =
-        match GlyphFragment::new_char(ctx.font, symbol_styles, c, elem.span()) {
+        match GlyphFragment::new(ctx.font, symbol_styles, &text, elem.span()) {
             Ok(mut glyph) => {
                 adjust_glyph_layout(&mut glyph, ctx, styles);
                 glyph.into()
@@ -134,8 +153,7 @@ pub fn layout_symbol(
             Err(_) => {
                 // Not in the math font, fallback to normal inline text layout.
                 // TODO: Should replace this with proper fallback in [`GlyphFragment::new`].
-                layout_inline_text(c.encode_utf8(&mut [0; 4]), elem.span(), ctx, styles)?
-                    .into()
+                layout_inline_text(&text, elem.span(), ctx, styles)?.into()
             }
         };
     ctx.push(fragment);
@@ -161,226 +179,6 @@ fn adjust_glyph_layout(
     }
 }
 
-/// Style the character by selecting the unicode codepoint for italic, bold,
-/// caligraphic, etc.
-///
-/// <https://www.w3.org/TR/mathml-core/#new-text-transform-mappings>
-/// <https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols>
-fn styled_char(styles: StyleChain, c: char, auto_italic: bool) -> char {
-    use MathVariant::*;
-
-    let variant = styles.get(EquationElem::variant);
-    let bold = styles.get(EquationElem::bold);
-    let italic = styles.get(EquationElem::italic).unwrap_or(
-        auto_italic
-            && matches!(
-                c,
-                'a'..='z' | 'ħ' | 'ı' | 'ȷ' | 'A'..='Z' |
-                'α'..='ω' | '∂' | 'ϵ' | 'ϑ' | 'ϰ' | 'ϕ' | 'ϱ' | 'ϖ'
-            )
-            && matches!(variant, Sans | Serif),
-    );
-
-    if let Some(c) = basic_exception(c) {
-        return c;
-    }
-
-    if let Some(c) = latin_exception(c, variant, bold, italic) {
-        return c;
-    }
-
-    if let Some(c) = greek_exception(c, variant, bold, italic) {
-        return c;
-    }
-
-    let base = match c {
-        'A'..='Z' => 'A',
-        'a'..='z' => 'a',
-        'Α'..='Ω' => 'Α',
-        'α'..='ω' => 'α',
-        '0'..='9' => '0',
-        // Hebrew Alef -> Dalet.
-        '\u{05D0}'..='\u{05D3}' => '\u{05D0}',
-        _ => return c,
-    };
-
-    let tuple = (variant, bold, italic);
-    let start = match c {
-        // Latin upper.
-        'A'..='Z' => match tuple {
-            (Serif, false, false) => 0x0041,
-            (Serif, true, false) => 0x1D400,
-            (Serif, false, true) => 0x1D434,
-            (Serif, true, true) => 0x1D468,
-            (Sans, false, false) => 0x1D5A0,
-            (Sans, true, false) => 0x1D5D4,
-            (Sans, false, true) => 0x1D608,
-            (Sans, true, true) => 0x1D63C,
-            (Cal, false, _) => 0x1D49C,
-            (Cal, true, _) => 0x1D4D0,
-            (Frak, false, _) => 0x1D504,
-            (Frak, true, _) => 0x1D56C,
-            (Mono, _, _) => 0x1D670,
-            (Bb, _, _) => 0x1D538,
-        },
-
-        // Latin lower.
-        'a'..='z' => match tuple {
-            (Serif, false, false) => 0x0061,
-            (Serif, true, false) => 0x1D41A,
-            (Serif, false, true) => 0x1D44E,
-            (Serif, true, true) => 0x1D482,
-            (Sans, false, false) => 0x1D5BA,
-            (Sans, true, false) => 0x1D5EE,
-            (Sans, false, true) => 0x1D622,
-            (Sans, true, true) => 0x1D656,
-            (Cal, false, _) => 0x1D4B6,
-            (Cal, true, _) => 0x1D4EA,
-            (Frak, false, _) => 0x1D51E,
-            (Frak, true, _) => 0x1D586,
-            (Mono, _, _) => 0x1D68A,
-            (Bb, _, _) => 0x1D552,
-        },
-
-        // Greek upper.
-        'Α'..='Ω' => match tuple {
-            (Serif, false, false) => 0x0391,
-            (Serif, true, false) => 0x1D6A8,
-            (Serif, false, true) => 0x1D6E2,
-            (Serif, true, true) => 0x1D71C,
-            (Sans, _, false) => 0x1D756,
-            (Sans, _, true) => 0x1D790,
-            (Cal | Frak | Mono | Bb, _, _) => return c,
-        },
-
-        // Greek lower.
-        'α'..='ω' => match tuple {
-            (Serif, false, false) => 0x03B1,
-            (Serif, true, false) => 0x1D6C2,
-            (Serif, false, true) => 0x1D6FC,
-            (Serif, true, true) => 0x1D736,
-            (Sans, _, false) => 0x1D770,
-            (Sans, _, true) => 0x1D7AA,
-            (Cal | Frak | Mono | Bb, _, _) => return c,
-        },
-
-        // Hebrew Alef -> Dalet.
-        '\u{05D0}'..='\u{05D3}' => 0x2135,
-
-        // Numbers.
-        '0'..='9' => match tuple {
-            (Serif, false, _) => 0x0030,
-            (Serif, true, _) => 0x1D7CE,
-            (Bb, _, _) => 0x1D7D8,
-            (Sans, false, _) => 0x1D7E2,
-            (Sans, true, _) => 0x1D7EC,
-            (Mono, _, _) => 0x1D7F6,
-            (Cal | Frak, _, _) => return c,
-        },
-
-        _ => unreachable!(),
-    };
-
-    std::char::from_u32(start + (c as u32 - base as u32)).unwrap()
-}
-
-fn basic_exception(c: char) -> Option<char> {
-    Some(match c {
-        '〈' => '⟨',
-        '〉' => '⟩',
-        '《' => '⟪',
-        '》' => '⟫',
-        _ => return None,
-    })
-}
-
-fn latin_exception(
-    c: char,
-    variant: MathVariant,
-    bold: bool,
-    italic: bool,
-) -> Option<char> {
-    use MathVariant::*;
-    Some(match (c, variant, bold, italic) {
-        ('B', Cal, false, _) => 'ℬ',
-        ('E', Cal, false, _) => 'ℰ',
-        ('F', Cal, false, _) => 'ℱ',
-        ('H', Cal, false, _) => 'ℋ',
-        ('I', Cal, false, _) => 'ℐ',
-        ('L', Cal, false, _) => 'ℒ',
-        ('M', Cal, false, _) => 'ℳ',
-        ('R', Cal, false, _) => 'ℛ',
-        ('C', Frak, false, _) => 'ℭ',
-        ('H', Frak, false, _) => 'ℌ',
-        ('I', Frak, false, _) => 'ℑ',
-        ('R', Frak, false, _) => 'ℜ',
-        ('Z', Frak, false, _) => 'ℨ',
-        ('C', Bb, ..) => 'ℂ',
-        ('H', Bb, ..) => 'ℍ',
-        ('N', Bb, ..) => 'ℕ',
-        ('P', Bb, ..) => 'ℙ',
-        ('Q', Bb, ..) => 'ℚ',
-        ('R', Bb, ..) => 'ℝ',
-        ('Z', Bb, ..) => 'ℤ',
-        ('D', Bb, _, true) => 'ⅅ',
-        ('d', Bb, _, true) => 'ⅆ',
-        ('e', Bb, _, true) => 'ⅇ',
-        ('i', Bb, _, true) => 'ⅈ',
-        ('j', Bb, _, true) => 'ⅉ',
-        ('h', Serif, false, true) => 'ℎ',
-        ('e', Cal, false, _) => 'ℯ',
-        ('g', Cal, false, _) => 'ℊ',
-        ('o', Cal, false, _) => 'ℴ',
-        ('ħ', Serif, .., true) => 'ℏ',
-        ('ı', Serif, .., true) => '𝚤',
-        ('ȷ', Serif, .., true) => '𝚥',
-        _ => return None,
-    })
-}
-
-fn greek_exception(
-    c: char,
-    variant: MathVariant,
-    bold: bool,
-    italic: bool,
-) -> Option<char> {
-    use MathVariant::*;
-    if c == 'Ϝ' && variant == Serif && bold {
-        return Some('𝟊');
-    }
-    if c == 'ϝ' && variant == Serif && bold {
-        return Some('𝟋');
-    }
-
-    let list = match c {
-        'ϴ' => ['𝚹', '𝛳', '𝜭', '𝝧', '𝞡', 'ϴ'],
-        '∇' => ['𝛁', '𝛻', '𝜵', '𝝯', '𝞩', '∇'],
-        '∂' => ['𝛛', '𝜕', '𝝏', '𝞉', '𝟃', '∂'],
-        'ϵ' => ['𝛜', '𝜖', '𝝐', '𝞊', '𝟄', 'ϵ'],
-        'ϑ' => ['𝛝', '𝜗', '𝝑', '𝞋', '𝟅', 'ϑ'],
-        'ϰ' => ['𝛞', '𝜘', '𝝒', '𝞌', '𝟆', 'ϰ'],
-        'ϕ' => ['𝛟', '𝜙', '𝝓', '𝞍', '𝟇', 'ϕ'],
-        'ϱ' => ['𝛠', '𝜚', '𝝔', '𝞎', '𝟈', 'ϱ'],
-        'ϖ' => ['𝛡', '𝜛', '𝝕', '𝞏', '𝟉', 'ϖ'],
-        'Γ' => ['𝚪', '𝛤', '𝜞', '𝝘', '𝞒', 'ℾ'],
-        'γ' => ['𝛄', '𝛾', '𝜸', '𝝲', '𝞬', 'ℽ'],
-        'Π' => ['𝚷', '𝛱', '𝜫', '𝝥', '𝞟', 'ℿ'],
-        'π' => ['𝛑', '𝜋', '𝝅', '𝝿', '𝞹', 'ℼ'],
-        '∑' => ['∑', '∑', '∑', '∑', '∑', '⅀'],
-        _ => return None,
-    };
-
-    Some(match (variant, bold, italic) {
-        (Serif, true, false) => list[0],
-        (Serif, false, true) => list[1],
-        (Serif, true, true) => list[2],
-        (Sans, _, false) => list[3],
-        (Sans, _, true) => list[4],
-        (Bb, ..) => list[5],
-        _ => return None,
-    })
-}
-
 /// The non-dotless version of a dotless character that can be used with the
 /// `dtls` OpenType feature.
 pub fn try_dotless(c: char) -> Option<char> {

crates/typst-library/src/foundations/content/packed.rs

@@ -64,6 +64,16 @@ impl<T: NativeElement> Packed<T> {
         self.0
     }
 
+    /// Pack back into a reference to content.
+    pub fn pack_ref(&self) -> &Content {
+        &self.0
+    }
+
+    /// Pack back into a mutable reference to content.
+    pub fn pack_mut(&mut self) -> &mut Content {
+        &mut self.0
+    }
+
     /// Extract the raw underlying element.
     pub fn unpack(self) -> T {
         // This function doesn't yet need owned self, but might in the future.
@@ -94,10 +104,6 @@ impl<T: NativeElement> Packed<T> {
     pub fn set_location(&mut self, location: Location) {
         self.0.set_location(location);
     }
-
-    pub fn as_content(&self) -> &Content {
-        &self.0
-    }
 }
 
 impl<T: NativeElement> AsRef<T> for Packed<T> {

crates/typst-library/src/foundations/content/raw.rs

@@ -141,7 +141,7 @@ impl RawContent {
 
     /// Clones a packed element into new raw content.
     pub(super) fn clone_impl<E: NativeElement>(elem: &Packed<E>) -> Self {
-        let raw = &elem.as_content().0;
+        let raw = &elem.pack_ref().0;
         let header = raw.header();
         RawContent::create(
             elem.as_ref().clone(),

crates/typst-library/src/foundations/int.rs

@@ -46,7 +46,7 @@ impl i64 {
     /// or smaller than the minimum 64-bit signed integer.
     ///
     /// - Booleans are converted to `0` or `1`.
-    /// - Floats and decimals are truncated to the corresponding 64-bit integer.
+    /// - Floats and decimals are rounded to the next 64-bit integer towards zero.
     /// - Strings are parsed in base 10.
     ///
     /// ```example

crates/typst-library/src/html/dom.rs

@@ -165,6 +165,11 @@ cast! {
 pub struct HtmlAttrs(pub EcoVec<(HtmlAttr, EcoString)>);
 
 impl HtmlAttrs {
+    /// Creates an empty attribute list.
+    pub fn new() -> Self {
+        Self::default()
+    }
+
     /// Add an attribute.
     pub fn push(&mut self, attr: HtmlAttr, value: impl Into<EcoString>) {
         self.0.push((attr, value.into()));

crates/typst-library/src/math/equation.rs

@@ -1,5 +1,6 @@
 use std::num::NonZeroUsize;
 
+use codex::styling::MathVariant;
 use typst_utils::NonZeroExt;
 use unicode_math_class::MathClass;
 
@@ -12,7 +13,7 @@ use crate::introspection::{Count, Counter, CounterUpdate, Locatable};
 use crate::layout::{
     AlignElem, Alignment, BlockElem, OuterHAlignment, SpecificAlignment, VAlignment,
 };
-use crate::math::{MathSize, MathVariant};
+use crate::math::MathSize;
 use crate::model::{Numbering, Outlinable, ParLine, Refable, Supplement};
 use crate::text::{FontFamily, FontList, FontWeight, LocalName, TextElem};
 
@@ -111,7 +112,7 @@ pub struct EquationElem {
     /// The style variant to select.
     #[internal]
     #[ghost]
-    pub variant: MathVariant,
+    pub variant: Option<MathVariant>,
 
     /// Affects the height of exponents.
     #[internal]
@@ -128,7 +129,7 @@ pub struct EquationElem {
     /// Whether to use italic glyphs.
     #[internal]
     #[ghost]
-    pub italic: Smart<bool>,
+    pub italic: Option<bool>,
 
     /// A forced class to use for all fragment.
     #[internal]

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

@@ -80,6 +80,7 @@ pub fn module() -> Module {
     math.define_func::<italic>();
     math.define_func::<serif>();
     math.define_func::<sans>();
+    math.define_func::<scr>();
     math.define_func::<cal>();
     math.define_func::<frak>();
     math.define_func::<mono>();

crates/typst-library/src/math/style.rs

@@ -1,4 +1,6 @@
-use crate::foundations::{func, Cast, Content, Smart};
+use codex::styling::MathVariant;
+
+use crate::foundations::{func, Cast, Content};
 use crate::math::EquationElem;
 
 /// Bold font style in math.
@@ -24,7 +26,7 @@ pub fn upright(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::italic, Smart::Custom(false))
+    body.set(EquationElem::italic, Some(false))
 }
 
 /// Italic font style in math.
@@ -35,7 +37,7 @@ pub fn italic(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::italic, Smart::Custom(true))
+    body.set(EquationElem::italic, Some(true))
 }
 
 /// Serif (roman) font style in math.
@@ -46,7 +48,7 @@ pub fn serif(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::variant, MathVariant::Serif)
+    body.set(EquationElem::variant, Some(MathVariant::Plain))
 }
 
 /// Sans-serif font style in math.
@@ -59,23 +61,39 @@ pub fn sans(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::variant, MathVariant::Sans)
+    body.set(EquationElem::variant, Some(MathVariant::SansSerif))
 }
 
-/// Calligraphic font style in math.
+/// Calligraphic (chancery) font style in math.
 ///
 /// ```example
 /// Let $cal(P)$ be the set of ...
 /// ```
 ///
-/// This corresponds both to LaTeX's `\mathcal` and `\mathscr` as both of these
-/// styles share the same Unicode codepoints. Switching between the styles is
-/// thus only possible if supported by the font via
-/// [font features]($text.features).
+/// This is the default calligraphic/script style for most math fonts. See
+/// [`scr`]($math.scr) for more on how to get the other style (roundhand).
+#[func(title = "Calligraphic", keywords = ["mathcal", "chancery"])]
+pub fn cal(
+    /// The content to style.
+    body: Content,
+) -> Content {
+    body.set(EquationElem::variant, Some(MathVariant::Chancery))
+}
+
+/// Script (roundhand) font style in math.
 ///
-/// For the default math font, the roundhand style is available through the
-/// `ss01` feature. Therefore, you could define your own version of `\mathscr`
-/// like this:
+/// ```example
+/// $ scr(S) $
+/// ```
+///
+/// There are two ways that fonts can support differentiating `cal` and `scr`.
+/// The first is using Unicode variation sequences. This works out of the box
+/// in Typst, however only a few math fonts currently support this.
+///
+/// The other way is using [font features]($text.features). For example, the
+/// roundhand style might be available in a font through the `ss01` feature.
+/// To use it in Typst, you could then define your own version of `scr` like
+/// this:
 ///
 /// ```example
 /// #let scr(it) = text(
@@ -88,12 +106,12 @@ pub fn sans(
 ///
 /// (The box is not conceptually necessary, but unfortunately currently needed
 /// due to limitations in Typst's text style handling in math.)
-#[func(title = "Calligraphic", keywords = ["mathcal", "mathscr"])]
-pub fn cal(
+#[func(title = "Script Style", keywords = ["mathscr", "roundhand"])]
+pub fn scr(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::variant, MathVariant::Cal)
+    body.set(EquationElem::variant, Some(MathVariant::Roundhand))
 }
 
 /// Fraktur font style in math.
@@ -106,7 +124,7 @@ pub fn frak(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::variant, MathVariant::Frak)
+    body.set(EquationElem::variant, Some(MathVariant::Fraktur))
 }
 
 /// Monospace font style in math.
@@ -119,7 +137,7 @@ pub fn mono(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::variant, MathVariant::Mono)
+    body.set(EquationElem::variant, Some(MathVariant::Monospace))
 }
 
 /// Blackboard bold (double-struck) font style in math.
@@ -137,7 +155,7 @@ pub fn bb(
     /// The content to style.
     body: Content,
 ) -> Content {
-    body.set(EquationElem::variant, MathVariant::Bb)
+    body.set(EquationElem::variant, Some(MathVariant::DoubleStruck))
 }
 
 /// Forced display style in math.
@@ -240,15 +258,3 @@ pub enum MathSize {
     /// Math on its own line.
     Display,
 }
-
-/// A mathematical style variant, as defined by Unicode.
-#[derive(Debug, Default, Copy, Clone, Eq, PartialEq, Cast, Hash)]
-pub enum MathVariant {
-    #[default]
-    Serif,
-    Sans,
-    Cal,
-    Frak,
-    Mono,
-    Bb,
-}

crates/typst-library/src/visualize/image/mod.rs

@@ -8,6 +8,7 @@ pub use self::raster::{
 };
 pub use self::svg::SvgImage;
 
+use std::ffi::OsStr;
 use std::fmt::{self, Debug, Formatter};
 use std::sync::Arc;
 
@@ -15,14 +16,16 @@ use ecow::EcoString;
 use typst_syntax::{Span, Spanned};
 use typst_utils::LazyHash;
 
-use crate::diag::StrResult;
+use crate::diag::{warning, At, LoadedWithin, SourceResult, StrResult};
+use crate::engine::Engine;
 use crate::foundations::{
     cast, elem, func, scope, Bytes, Cast, Content, Derived, NativeElement, Packed, Smart,
+    StyleChain,
 };
 use crate::layout::{Length, Rel, Sizing};
 use crate::loading::{DataSource, Load, LoadSource, Loaded, Readable};
 use crate::model::Figurable;
-use crate::text::LocalName;
+use crate::text::{families, LocalName};
 
 /// A raster or vector graphic.
 ///
@@ -217,6 +220,81 @@ impl ImageElem {
     }
 }
 
+impl Packed<ImageElem> {
+    /// Decodes the image.
+    pub fn decode(&self, engine: &mut Engine, styles: StyleChain) -> SourceResult<Image> {
+        let span = self.span();
+        let loaded = &self.source.derived;
+        let format = self.determine_format(styles).at(span)?;
+
+        // Warn the user if the image contains a foreign object. Not perfect
+        // because the svg could also be encoded, but that's an edge case.
+        if format == ImageFormat::Vector(VectorFormat::Svg) {
+            let has_foreign_object =
+                memchr::memmem::find(&loaded.data, b"<foreignObject").is_some();
+
+            if has_foreign_object {
+                engine.sink.warn(warning!(
+                span,
+                "image contains foreign object";
+                hint: "SVG images with foreign objects might render incorrectly in typst";
+                hint: "see https://github.com/typst/typst/issues/1421 for more information"
+            ));
+            }
+        }
+
+        // Construct the image itself.
+        let kind = match format {
+            ImageFormat::Raster(format) => ImageKind::Raster(
+                RasterImage::new(
+                    loaded.data.clone(),
+                    format,
+                    self.icc.get_ref(styles).as_ref().map(|icc| icc.derived.clone()),
+                )
+                .at(span)?,
+            ),
+            ImageFormat::Vector(VectorFormat::Svg) => ImageKind::Svg(
+                SvgImage::with_fonts(
+                    loaded.data.clone(),
+                    engine.world,
+                    &families(styles).map(|f| f.as_str()).collect::<Vec<_>>(),
+                )
+                .within(loaded)?,
+            ),
+        };
+
+        Ok(Image::new(kind, self.alt.get_cloned(styles), self.scaling.get(styles)))
+    }
+
+    /// Tries to determine the image format based on the format that was
+    /// explicitly defined, or else the extension, or else the data.
+    fn determine_format(&self, styles: StyleChain) -> StrResult<ImageFormat> {
+        if let Smart::Custom(v) = self.format.get(styles) {
+            return Ok(v);
+        };
+
+        let Derived { source, derived: loaded } = &self.source;
+        if let DataSource::Path(path) = source {
+            let ext = std::path::Path::new(path.as_str())
+                .extension()
+                .and_then(OsStr::to_str)
+                .unwrap_or_default()
+                .to_lowercase();
+
+            match ext.as_str() {
+                "png" => return Ok(ExchangeFormat::Png.into()),
+                "jpg" | "jpeg" => return Ok(ExchangeFormat::Jpg.into()),
+                "gif" => return Ok(ExchangeFormat::Gif.into()),
+                "svg" | "svgz" => return Ok(VectorFormat::Svg.into()),
+                "webp" => return Ok(ExchangeFormat::Webp.into()),
+                _ => {}
+            }
+        }
+
+        Ok(ImageFormat::detect(&loaded.data).ok_or("unknown image format")?)
+    }
+}
+
 impl LocalName for Packed<ImageElem> {
     const KEY: &'static str = "figure";
 }

crates/typst-svg/src/image.rs

@@ -18,21 +18,27 @@ impl SVGRenderer {
         self.xml.write_attribute("width", &size.x.to_pt());
         self.xml.write_attribute("height", &size.y.to_pt());
         self.xml.write_attribute("preserveAspectRatio", "none");
-        match image.scaling() {
-            Smart::Auto => {}
-            Smart::Custom(ImageScaling::Smooth) => {
-                // This is still experimental and not implemented in all major browsers.
-                // https://developer.mozilla.org/en-US/docs/Web/CSS/image-rendering#browser_compatibility
-                self.xml.write_attribute("style", "image-rendering: smooth")
-            }
-            Smart::Custom(ImageScaling::Pixelated) => {
-                self.xml.write_attribute("style", "image-rendering: pixelated")
-            }
+        if let Some(value) = convert_image_scaling(image.scaling()) {
+            self.xml
+                .write_attribute("style", &format_args!("image-rendering: {value}"))
         }
         self.xml.end_element();
     }
 }
 
+/// Converts an image scaling to a CSS `image-rendering` propery value.
+pub fn convert_image_scaling(scaling: Smart<ImageScaling>) -> Option<&'static str> {
+    match scaling {
+        Smart::Auto => None,
+        Smart::Custom(ImageScaling::Smooth) => {
+            // This is still experimental and not implemented in all major browsers.
+            // https://developer.mozilla.org/en-US/docs/Web/CSS/image-rendering#browser_compatibility
+            Some("smooth")
+        }
+        Smart::Custom(ImageScaling::Pixelated) => Some("pixelated"),
+    }
+}
+
 /// Encode an image into a data URL. The format of the URL is
 /// `data:image/{format};base64,`.
 #[comemo::memoize]

crates/typst-svg/src/lib.rs

@@ -5,6 +5,8 @@ mod paint;
 mod shape;
 mod text;
 
+pub use image::{convert_image_scaling, convert_image_to_base64_url};
+
 use std::collections::HashMap;
 use std::fmt::{self, Display, Formatter, Write};
 

docs/reference/groups.yml

@@ -5,7 +5,7 @@
   title: Variants
   category: math
   path: ["math"]
-  filter: ["serif", "sans", "frak", "mono", "bb", "cal"]
+  filter: ["serif", "sans", "frak", "mono", "bb", "cal", "scr"]
   details: |
     Alternate typefaces within formulas.
 

tests/ref/html/image-jpg-html-base64.html

@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+  </head>
+  <body><img src="data:image/jpeg;base64,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" alt="The letter F"></body>
+</html>

tests/ref/html/image-scaling-methods.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>
+    <div style="display: flex; flex-direction: row; gap: 4pt"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAKUlEQVR4AQEeAOH/AP8AAAD/AAAA/wCAAAAAgAAAAIAAgIAAAICAgACAcFMHfiTGz0oAAAAASUVORK5CYII=" style="width: 28.346456692913385pt"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAKUlEQVR4AQEeAOH/AP8AAAD/AAAA/wCAAAAAgAAAAIAAgIAAAICAgACAcFMHfiTGz0oAAAAASUVORK5CYII=" style="image-rendering: smooth; width: 28.346456692913385pt"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAKUlEQVR4AQEeAOH/AP8AAAD/AAAA/wCAAAAAgAAAAIAAgIAAAICAgACAcFMHfiTGz0oAAAAASUVORK5CYII=" style="image-rendering: pixelated; width: 28.346456692913385pt"></div>
+  </body>
+</html>

tests/suite/math/style.typ

@@ -12,6 +12,15 @@ $A, italic(A), upright(A), bold(A), bold(upright(A)), \
  bb("hello") + bold(cal("world")), \
  mono("SQRT")(x) wreath mono(123 + 456)$
 
+--- math-style-fallback ---
+// Test how math styles fallback.
+$upright(frak(bold(alpha))) = upright(bold(alpha)) \
+bold(mono(ϝ)) = bold(ϝ) \
+sans(Theta) = bold(sans(Theta)) \
+bold(upright(planck)) != planck \
+bb(e) != italic(bb(e)) \
+serif(sans(A)) != serif(A)$
+
 --- math-style-dotless ---
 // Test styling dotless i and j.
 $ dotless.i dotless.j,
@@ -21,7 +30,7 @@ $ dotless.i dotless.j,
   bb(dotless.i) bb(dotless.j),
   cal(dotless.i) cal(dotless.j),
   frak(dotless.i) frak(dotless.j),
-  mono(dotless.i) mono(dotless.j), 
+  mono(dotless.i) mono(dotless.j),
   bold(frak(dotless.i)) upright(sans(dotless.j)),
   italic(bb(dotless.i)) frak(sans(dotless.j)) $
 
@@ -38,7 +47,15 @@ $bb(Gamma) , bb(gamma), bb(Pi), bb(pi), bb(sum)$
 
 --- math-style-hebrew-exceptions ---
 // Test hebrew exceptions.
-$aleph, beth, gimel, daleth$
+$aleph, beth, gimel, daleth$ \
+$upright(aleph), upright(beth), upright(gimel), upright(daleth)$
+
+--- math-style-script ---
+// Test variation selectors for scr and cal.
+$cal(A) scr(A) bold(cal(O)) scr(bold(O))$
+
+#show math.equation: set text(font: "Noto Sans Math")
+$scr(E) cal(E) bold(scr(Y)) cal(bold(Y))$
 
 --- issue-3650-italic-equation ---
 _abc $sin(x) "abc"$_ \

tests/suite/visualize/image.typ

@@ -9,6 +9,9 @@
 #set page(height: 60pt)
 #image("/assets/images/tiger.jpg")
 
+--- image-jpg-html-base64 html ---
+#image("/assets/images/f2t.jpg", alt: "The letter F")
+
 --- image-sizing ---
 // Test configuring the size and fitting behaviour of images.
 
@@ -128,7 +131,7 @@ A #box(image("/assets/images/tiger.jpg", height: 1cm, width: 80%)) B
   width: 1cm,
 )
 
---- image-scaling-methods ---
+--- image-scaling-methods render html ---
 #let img(scaling) = image(
   bytes((
     0xFF, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0xFF,
@@ -144,14 +147,26 @@ A #box(image("/assets/images/tiger.jpg", height: 1cm, width: 80%)) B
   scaling: scaling,
 )
 
-#stack(
-  dir: ltr,
-  spacing: 4pt,
+#let images = (
   img(auto),
   img("smooth"),
   img("pixelated"),
 )
 
+#context if target() == "html" {
+  // TODO: Remove this once `stack` is supported in HTML export.
+  html.div(
+    style: "display: flex; flex-direction: row; gap: 4pt",
+    images.join(),
+  )
+} else {
+  stack(
+    dir: ltr,
+    spacing: 4pt,
+    ..images,
+  )
+}
+
 --- image-natural-dpi-sizing ---
 // Test that images aren't upscaled.
 // Image is just 48x80 at 220dpi. It should not be scaled to fit the page