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Andres TorresiandClaude Haiku 5.5
be98657a22
A Typography panel (Window ▸ Show Panel, and the icon column) lists the features of the selected text's fonts, merged over those fonts, grouped as Ligatures, Alternates, Stylistic Sets (named by the font), Figure Style, Figure Width, Figure Position and Capitals. A section or choice appears only when a font offers it. Each feature is a checkbox: checked when all of the selection has it, a dash when only some of it does, empty when none does. A feature only some of the selection's fonts offer is italic. Mutually exclusive choices are checkboxes too, and choosing one turns the others off. type.openTypeFeatures reports each feature's applied and available state over the selection. type.feature turns features on or off across the selection, keeping each run's other features. The fonts crate reads GSUB and GPOS feature lists and stylistic set names. The Character panel's OpenType menu is now a button that opens or focuses the Typography panel. Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
92 lines
3.9 KiB
Rust
92 lines
3.9 KiB
Rust
//! OpenType features as the Character panel's OpenType menu offers them, kept in a character
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//! format's `otf_features` tag list (`"dlig"` on, `"-calt"` off).
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/// On/off features: (tag, menu label, IDML attribute).
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pub const TOGGLES: &[(&str, &str, &str)] = &[
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("dlig", "Discretionary Ligatures", "OTFDiscretionaryLigature"),
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("frac", "Fractions", "OTFFraction"),
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("ordn", "Ordinal", "OTFOrdinal"),
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("swsh", "Swash", "OTFSwash"),
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("titl", "Titling Alternates", "OTFTitling"),
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("calt", "Contextual Alternates", "OTFContextualAlternate"),
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("zero", "Slashed Zero", "OTFSlashedZero"),
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("palt", "Proportional Metrics", "OTFProportionalMetrics"),
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("hkna", "Horizontal Kana", "OTFHVKana"),
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("locl", "Localized Forms", "OTFLocale"),
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("mark", "Mark Positioning", "OTFMark"),
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("hist", "Historical Forms", "OTFHistorical"),
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("salt", "Stylistic Alternates", "OTFStylisticAlternate"),
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("jalt", "Justification Alternates", "OTFJustificationAlternate"),
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("ital", "Roman Italics", "OTFRomanItalics"),
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];
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/// Figure styles: (id, menu label, tags, IDML value).
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pub const FIGURES: &[(&str, &str, &[&str], &str)] = &[
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("tabularLining", "Tabular Lining", &["tnum", "lnum"], "TabularLining"),
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("proportionalOldstyle", "Proportional Oldstyle", &["pnum", "onum"], "ProportionalOldstyle"),
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("proportionalLining", "Proportional Lining", &["pnum", "lnum"], "ProportionalLining"),
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("tabularOldstyle", "Tabular Oldstyle", &["tnum", "onum"], "TabularOldstyle"),
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("default", "Default Figure Style", &[], "Default"),
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];
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/// Features shaping turns on by itself: "off" is an explicit `-tag`.
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fn default_on(tag: &str) -> bool {
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matches!(tag, "calt" | "liga" | "locl" | "mark")
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}
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pub fn is_on(list: &[String], tag: &str) -> bool {
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if default_on(tag) { !list.iter().any(|t| t.strip_prefix('-') == Some(tag)) } else { list.iter().any(|t| t == tag) }
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}
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pub fn set(list: &mut Vec<String>, tag: &str, on: bool) {
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list.retain(|t| t != tag && t.strip_prefix('-') != Some(tag));
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if on != default_on(tag) {
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list.push(if on { tag.to_string() } else { format!("-{tag}") });
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}
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}
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/// The figure style id of a tag list ("default" when none matches).
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pub fn figures(list: &[String]) -> &'static str {
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FIGURES.iter().find(|(_, _, tags, _)| !tags.is_empty() && tags.iter().all(|t| list.iter().any(|x| x == t))).map_or("default", |f| f.0)
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}
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pub fn set_figures(list: &mut Vec<String>, id: &str) -> bool {
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let Some((_, _, tags, _)) = FIGURES.iter().find(|f| f.0 == id) else { return false };
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list.retain(|t| !matches!(t.as_str(), "tnum" | "pnum" | "lnum" | "onum"));
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list.extend(tags.iter().map(|t| t.to_string()));
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true
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}
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/// Stylistic sets 1–20 as a bit mask (bit 0 = ss01), IDML's `OTFStylisticSets`.
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pub fn stylistic_sets(list: &[String]) -> u32 {
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list.iter().filter_map(|t| t.strip_prefix("ss")?.parse::<u32>().ok()).filter(|n| (1..=20).contains(n)).fold(0, |m, n| m | 1 << (n - 1))
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}
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pub fn set_stylistic_sets(list: &mut Vec<String>, mask: u32) {
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list.retain(|t| !(t.len() == 4 && t.starts_with("ss") && t[2..].parse::<u32>().is_ok()));
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list.extend((1..=20).filter(|n| mask & (1 << (n - 1)) != 0).map(|n| format!("ss{n:02}")));
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn toggles_figures_and_sets() {
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let mut l: Vec<String> = vec![];
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assert!(is_on(&l, "calt") && !is_on(&l, "dlig"));
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set(&mut l, "dlig", true);
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set(&mut l, "calt", false);
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assert_eq!(l, ["dlig", "-calt"]);
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set(&mut l, "calt", true);
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assert_eq!(l, ["dlig"]);
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assert!(set_figures(&mut l, "tabularOldstyle"));
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assert_eq!(figures(&l), "tabularOldstyle");
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set_figures(&mut l, "default");
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assert_eq!(figures(&l), "default");
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set_stylistic_sets(&mut l, 0b101);
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assert_eq!(stylistic_sets(&l), 0b101);
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assert!(l.contains(&"ss03".to_string()));
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}
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}
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