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Fonts: report a missing Word core font with no metric twin
Fonts: report a missing Word core font with no metric twin Without Times New Roman or a metric twin installed, text set in Times New Roman is drawn in a wider serif and paginates differently from Word. The resolver already prefers Liberation Serif and Tinos for it; what was missing was the font files (craft-fonts has them in open PRs storytold/craft-fonts#43 and #49, not merged) and any sign that the fallback was happening. ## What changed - `fonts::word::missing_metric_fonts()` lists Word's core families (Times New Roman, Arial, Courier New, Calibri, Cambria) that have neither the font nor an open metric twin (Liberation, Tinos, Arimo, Cousine, Carl
- Status
- open
- Score
- 0.00
- Adopters
- 0 other operators
- Author
- Harrison-Booth (imported from pull request #4619, open)
- Base
4b8b06fe03f93c9fc81783ee3e5b01977be89efc- Size
- +43 −2 in 5 files
- Review
- pending
- Shared
- 2026-10-28
- Id
7cf901921d5e778f4d000d82
How it went
No other operator has reported using it yet.
Diff
raw · Cargo.lock apps/wordcraft-cli/Cargo.toml apps/wordcraft-cli/src/main.rs crates/fonts/src/word.rs docs/layout-parity.md
@@ -6688,6 +6688,7 @@ dependencies = [ "sys-locale", "wordcraft-doc", "wordcraft-engine",+ "wordcraft-fonts", "wordcraft-mcp", "wordcraft-render", "wordcraft-zotero",@@ -16,6 +16,7 @@ workspace = true [dependencies] wordcraft-doc = { workspace = true } wordcraft-engine = { workspace = true }+wordcraft-fonts = { workspace = true } wordcraft-render = { workspace = true } wordcraft-mcp = { workspace = true } wordcraft-zotero = { workspace = true }@@ -415,6 +415,11 @@ fn run<S: AsRef<OsStr>>(args: &[S]) -> Result<(), Failure> { let markup = rest.iter().any(|a| a == "--markup"); let password = password_from(&rest)?; let mut s = open(&i, password.as_deref())?;+ for (word, used) in wordcraft_fonts::word::missing_metric_fonts() {+ eprintln!(+ "note: {word} and its metric-compatible twins aren't installed; drawing it in {used}, so lines and pages may not match Word's"+ );+ } if rest.iter().any(|a| a == "--update-fields") { s.run("references.updateFields", &json!({})).map_err(|e| e.to_string())?; }@@ -360,6 +360,28 @@ fn substitute(db: &FontDb, family: &str) -> Option<&'static str> { .or_else(|| installed.first().copied()) } +/// Word's core families, each with the open fonts that share its metrics. Without the family or+/// a twin, text set in it wraps and paginates differently from Word (Times New Roman drawn in a+/// wider serif fits fewer lines to a page).+const METRIC_TWINS: &[(&str, &[&str])] = &[+ ("Times New Roman", &["Liberation Serif", "Tinos"]),+ ("Arial", &["Liberation Sans", "Arimo"]),+ ("Courier New", &["Liberation Mono", "Cousine"]),+ ("Calibri", &["Carlito"]),+ ("Cambria", &["Caladea"]),+];++/// The Word core families with neither the font nor a metric-compatible twin installed, each with+/// the family drawn in its place: lines and pages measured with those won't match Word's.+pub fn missing_metric_fonts() -> Vec<(&'static str, &'static str)> {+ let db = FontDb::global();+ METRIC_TWINS+ .iter()+ .filter(|(word, twins)| !db.has_family(word) && !twins.iter().any(|t| db.has_family(t)))+ .map(|(word, _)| (*word, substitute(db, word).unwrap_or(crate::FALLBACK_FAMILY)))+ .collect()+}+ fn style_name(bold: bool, italic: bool) -> &'static str { match (bold, italic) { (false, false) => "Regular",@@ -694,4 +716,16 @@ mod tests { assert!(!has_named_substitutes(f), "{f}"); } }++ #[test]+ fn a_missing_core_font_is_reported_only_without_a_metric_twin() {+ let db = FontDb::global();+ let missing = missing_metric_fonts();+ for (word, twins) in METRIC_TWINS {+ let reported = missing.iter().any(|(w, _)| w == word);+ let covered = db.has_family(word) || twins.iter().any(|t| db.has_family(t));+ assert_eq!(reported, !covered, "{word}");+ }+ assert!(missing.iter().all(|(_, used)| db.has_family(used)));+ } }@@ -1,6 +1,6 @@ # Layout and pagination parity with Microsoft Word -> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-27 · **Change:** trivial (continuous sections one after another go onto new pages instead of running off the page; empty marks after another empty section mark take a line each until the page is full, then stay at its bottom drawing nothing, not even a list label; an empty mark that takes no room draws no list label either; a kept-together paragraph is measured against the page it would move to, so a tall different first-page header no longer splits it, #3907; previously trivial: a justified line ending in a manual line break is stretched to the margin unless `w:doNotExpandShiftReturn` is set, #3924; previously trivial: a no-break space is as wide as a space, #4192; previously trivial: a bookmark or other zero-width marker is no line-break opportunity, #4193; previously trivial: Arabic list labels: `arabicAlpha` and `arabicAbjad` draw the 28 Arabic letters (alphabetical and abjad order), doubling past the last letter; Hebrew, Hindi, Thai and Vietnamese still show decimal (`doc::section::tests::arabic_letters_count_in_both_orders`); previously trivial: Preserve grapheme edit/wrap boundaries across independently drawn font/style pieces; Exact-spacing table contact uses the specified line height rather than paragraph-mark metrics (#3977); previously trivial: cu20we: restrict pre-spacing float origins to paragraph anchors; document cap helpers and regressions; previously trivial: cu20we: outline caps; previously trivial: cu20we: box float paragraph origin; previously trivial: group connector rerouting preserves transformed free and unresolved endpoints under nonuniform scaling; readiness estimates unchanged; previously trivial: a word with no break opportunity in it no longer makes the layout quadratic, #3412; previously trivial: an empty paragraph whose mark is hidden shows nothing, not even its list number, which is still counted, #3982; previously trivial: a Thai run with Latin finds one installed font covering it all on Linux too, #1549; previously trivial: symbol fonts keep their line height without the font; previously trivial: an equation-array row without `&` is centred, #2617; previously trivial: a superscript or subscript sizes its line at the full font size, without its raise or drop, as Word does; previously trivial: an object dragged near the bottom of a page lands where it is dropped, #3169; previously trivial: centred list labels after leading page breaks, #2964; previously trivial: fixed font inputs in four layout controls; previously trivial: justified lines shrink their spaces by Word's measured limits; previously trivial: a right, centre or decimal tab whose text doesn't fit, or a left tab past the right indent, goes to the next line with its text, #1840; previously trivial: a click below a floating table goes to the text beside or after it, not to a cell of its last row, #2038; previously trivial: shapes drawn with their gradients and transparency, #1500; previously trivial: paragraphs above a float's anchor wrap around it, also when that pushes the anchor onto the next page, #2048; previously trivial: triple borders draw three lines, #1740; previously trivial: the caret, clicks and selection edges fall between the letters of a ligature, #1974; previously trivial: a word after a slash wraps whole, like Word, #2963; previously trivial: VML header-cell floats always on the page, user-checked in Word for Mac, #1775; previously trivial: an at-least row with no room for its minimum starts the next page whole, #1742; previously trivial: AutoFit donors lose equal widths down to their content minima; previously trivial: automatic space between Asian text and Latin text or digits, #2358; previously trivial: hint-reliant CJK outlines; previously trivial: positional tabs go to the margins or indents, #2367; previously trivial: field results with right-to-left text read right to left, #1670; previously trivial: a list bullet no installed font can draw shows the level's default bullet, #1683; previously trivial: a missing Thai font is drawn in one Thai face for the whole run, #1549; previously trivial: the caret after spaces hanging past the margin stays at the margin, #2146; previously trivial: covered black-circle fallback before UI sans; previously trivial: resolved split-cell continuation top insets; previously trivial: Symbol PCL6 alias uses Symbol encoding; previously trivial: exact full font names select their installed face; previously trivial: Arial Unicode MS uses proportional fallbacks; previously trivial: DrawingML outline dashes, including zero-width paths; previously trivial: TOCs include table-cell headings and retain full targets; previously trivial: kept table rows follow the next row; previously trivial: consistent cell widths override a stale table grid; previously trivial: multi-paragraph field instructions no longer add blank lines; previously trivial: page-break-only list paragraphs hide their labels; previously trivial: floating-table overlap ignores empty line-break lines; previously trivial: paragraph spacing adds up when the document turns HTML auto spacing off; previously trivial: an inherited footer sizes its percentage tables by its own section; previously trivial: an empty section mark stays on a full page; previously trivial: a fitting row with less room than its minimum height moves on whole; oversized rows still split; previously trivial: text past an exact-height row is cut off; previously trivial: a list number stays with text after a leading page break; previously trivial: a bookmark after a page break takes no line; previously trivial: a page break followed by a page break before or a next-page section starts one page; previously trivial: All Caps and Small Caps draw ß as SS, #1581; previously trivial: justified vertical page alignment, #1320; previously trivial: page numbers restart at 0; previously trivial: a list label moves with its first line when the paragraph is centred or end-aligned (#1159); previously trivial: PAGE fields in a paragraph split across pages show the page they are on, #1352; previously trivial: a dragged floating object anchors in the column it lands in, #884; previously trivial: a paragraph ending on a page with footnotes keeps its space after above the separator, #1116; previously trivial: symbol-font text drawn as Unicode symbols, #776; previously trivial: large-table scrolling measured and fixed, #811; previously trivial: text boxes use their own margins; Resize shape to fit text never cuts text, #743; previously trivial: complex-script shaping and Myanmar line breaking, #604; previously trivial: body page totals, table-cell footnotes and bookmark link pages fixed, #450 #451 #455; previously major: first version; line breaking, pagination and object placement checked against Word's behaviour from the layout source on origin/main) · **Target:** Microsoft Word (Microsoft 365) for Mac 16.113.4+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-27 · **Change:** trivial (`wordcraft-cli convert` notes when Times New Roman, Arial, Courier New, Calibri or Cambria has neither the font nor a metric-compatible twin installed, and which font draws it; previously trivial: continuous sections one after another go onto new pages instead of running off the page; empty marks after another empty section mark take a line each until the page is full, then stay at its bottom drawing nothing, not even a list label; an empty mark that takes no room draws no list label either; a kept-together paragraph is measured against the page it would move to, so a tall different first-page header no longer splits it, #3907; previously trivial: a justified line ending in a manual line break is stretched to the margin unless `w:doNotExpandShiftReturn` is set, #3924; previously trivial: a no-break space is as wide as a space, #4192; previously trivial: a bookmark or other zero-width marker is no line-break opportunity, #4193; previously trivial: Arabic list labels: `arabicAlpha` and `arabicAbjad` draw the 28 Arabic letters (alphabetical and abjad order), doubling past the last letter; Hebrew, Hindi, Thai and Vietnamese still show decimal (`doc::section::tests::arabic_letters_count_in_both_orders`); previously trivial: Preserve grapheme edit/wrap boundaries across independently drawn font/style pieces; Exact-spacing table contact uses the specified line height rather than paragraph-mark metrics (#3977); previously trivial: cu20we: restrict pre-spacing float origins to paragraph anchors; document cap helpers and regressions; previously trivial: cu20we: outline caps; previously trivial: cu20we: box float paragraph origin; previously trivial: group connector rerouting preserves transformed free and unresolved endpoints under nonuniform scaling; readiness estimates unchanged; previously trivial: a word with no break opportunity in it no longer makes the layout quadratic, #3412; previously trivial: an empty paragraph whose mark is hidden shows nothing, not even its list number, which is still counted, #3982; previously trivial: a Thai run with Latin finds one installed font covering it all on Linux too, #1549; previously trivial: symbol fonts keep their line height without the font; previously trivial: an equation-array row without `&` is centred, #2617; previously trivial: a superscript or subscript sizes its line at the full font size, without its raise or drop, as Word does; previously trivial: an object dragged near the bottom of a page lands where it is dropped, #3169; previously trivial: centred list labels after leading page breaks, #2964; previously trivial: fixed font inputs in four layout controls; previously trivial: justified lines shrink their spaces by Word's measured limits; previously trivial: a right, centre or decimal tab whose text doesn't fit, or a left tab past the right indent, goes to the next line with its text, #1840; previously trivial: a click below a floating table goes to the text beside or after it, not to a cell of its last row, #2038; previously trivial: shapes drawn with their gradients and transparency, #1500; previously trivial: paragraphs above a float's anchor wrap around it, also when that pushes the anchor onto the next page, #2048; previously trivial: triple borders draw three lines, #1740; previously trivial: the caret, clicks and selection edges fall between the letters of a ligature, #1974; previously trivial: a word after a slash wraps whole, like Word, #2963; previously trivial: VML header-cell floats always on the page, user-checked in Word for Mac, #1775; previously trivial: an at-least row with no room for its minimum starts the next page whole, #1742; previously trivial: AutoFit donors lose equal widths down to their content minima; previously trivial: automatic space between Asian text and Latin text or digits, #2358; previously trivial: hint-reliant CJK outlines; previously trivial: positional tabs go to the margins or indents, #2367; previously trivial: field results with right-to-left text read right to left, #1670; previously trivial: a list bullet no installed font can draw shows the level's default bullet, #1683; previously trivial: a missing Thai font is drawn in one Thai face for the whole run, #1549; previously trivial: the caret after spaces hanging past the margin stays at the margin, #2146; previously trivial: covered black-circle fallback before UI sans; previously trivial: resolved split-cell continuation top insets; previously trivial: Symbol PCL6 alias uses Symbol encoding; previously trivial: exact full font names select their installed face; previously trivial: Arial Unicode MS uses proportional fallbacks; previously trivial: DrawingML outline dashes, including zero-width paths; previously trivial: TOCs include table-cell headings and retain full targets; previously trivial: kept table rows follow the next row; previously trivial: consistent cell widths override a stale table grid; previously trivial: multi-paragraph field instructions no longer add blank lines; previously trivial: page-break-only list paragraphs hide their labels; previously trivial: floating-table overlap ignores empty line-break lines; previously trivial: paragraph spacing adds up when the document turns HTML auto spacing off; previously trivial: an inherited footer sizes its percentage tables by its own section; previously trivial: an empty section mark stays on a full page; previously trivial: a fitting row with less room than its minimum height moves on whole; oversized rows still split; previously trivial: text past an exact-height row is cut off; previously trivial: a list number stays with text after a leading page break; previously trivial: a bookmark after a page break takes no line; previously trivial: a page break followed by a page break before or a next-page section starts one page; previously trivial: All Caps and Small Caps draw ß as SS, #1581; previously trivial: justified vertical page alignment, #1320; previously trivial: page numbers restart at 0; previously trivial: a list label moves with its first line when the paragraph is centred or end-aligned (#1159); previously trivial: PAGE fields in a paragraph split across pages show the page they are on, #1352; previously trivial: a dragged floating object anchors in the column it lands in, #884; previously trivial: a paragraph ending on a page with footnotes keeps its space after above the separator, #1116; previously trivial: symbol-font text drawn as Unicode symbols, #776; previously trivial: large-table scrolling measured and fixed, #811; previously trivial: text boxes use their own margins; Resize shape to fit text never cuts text, #743; previously trivial: complex-script shaping and Myanmar line breaking, #604; previously trivial: body page totals, table-cell footnotes and bookmark link pages fixed, #450 #451 #455; previously major: first version; line breaking, pagination and object placement checked against Word's behaviour from the layout source on origin/main) · **Target:** Microsoft Word (Microsoft 365) for Mac 16.113.4 A document only "opens correctly" if its pages break where Word breaks them: the same lines, the same page count, footnotes and pictures on the same pages. This checklist covers line breaking,@@ -34,7 +34,7 @@ Exact line spacing keeps the run font baseline around tall equations; automatic | Kashida justification (Arabic) | ❌ | no kashida in `crates/layout` | 3–5 | | Missing Thai document fonts (TH Sarabun New, Angsana New, Cordia New, Browallia New, the UPC families, Leelawadee): one Thai substitute face for the whole run, Latin letters, digits and ฿ included, so the run keeps one font at one size as Word's Cordia New substitution does | ✅ | `fonts::word::tests::a_missing_thai_font_resolves_to_an_installed_thai_face`, `fonts::fontdb::tests::a_thai_run_with_latin_falls_back_to_one_face`, `layout::tests::complex::a_missing_thai_font_draws_the_whole_run_in_one_thai_face`, `layout::tests::complex::a_thai_substitute_without_latin_hands_the_run_to_one_face_covering_it`, `fonts::fontdb::tests::sysfonts::a_run_no_preferred_face_covers_whole_loads_an_installed_font_that_does` (#1549). Windows: Cordia New, then Leelawadee UI, Tahoma, Noto Sans Thai; macOS: Thonburi (Sathu for the serif families); Linux: Noto Sans Thai, then the TLWG fonts. The first listed face with Latin letters and digits as well as Thai wins. Other Thai names (`TH …`, `…UPC`, names with `Thai`) use the same lists. When no listed face is installed, or the one found lacks the run's Thai or Latin letters, the run moves to one installed face covering its Thai and Latin text if there is one, even when a preferred Thai family without Latin letters (Noto Sans Thai) is installed; that face's whole family is loaded, so regular text keeps the Regular face. Only Thai fonts: a missing Latin font keeps Latin text in its own substitute, and a run with its own complex-script font keeps it for the Thai letters, as Word does | — | | Distributed / Thai distributed alignment | 🟡 | read; layout untested | 1–2 |-| Default font metrics (Aptos, Calibri, Cambria…) | 🟡 | Missing Arial Unicode MS tries Arial then the Arial substitutes, case-insensitively (`fonts::word::tests::unicode_arial_is_proportional`); glyph coverage and exact Word line height can differ. Carlito/Caladea/Liberation are metric-compatible for Calibri/Cambria/Arial/Times/Courier; **Aptos (Word's default since 2024) has no metric-compatible open substitute**, so new Word documents wrap differently ([typing-parity.md](typing-parity.md) Known gaps). Needs an owner decision (commission or license a metric-matched font) | 6–10 + owner |+| Default font metrics (Aptos, Calibri, Cambria…) | 🟡 | Missing Arial Unicode MS tries Arial then the Arial substitutes, case-insensitively (`fonts::word::tests::unicode_arial_is_proportional`); glyph coverage and exact Word line height can differ. Carlito/Caladea/Liberation are metric-compatible for Calibri/Cambria/Arial/Times/Courier; they come with a build that has `CRAFT_FONTS_DIR` pointing at a craft-fonts checkout carrying Liberation or Tinos (storytold/craft-fonts PRs 43 and 49, not merged yet), and `wordcraft-cli convert` notes on stderr when none is installed (`fonts::word::tests::a_missing_core_font_is_reported_only_without_a_metric_twin`); with Liberation Serif embedded, a Times New Roman test document paginates as in Word 6 pages to 6 and 3 to 3 (Word for Windows via COM, Linux build); **Aptos (Word's default since 2024) has no metric-compatible open substitute**, so new Word documents wrap differently ([typing-parity.md](typing-parity.md) Known gaps). Needs an owner decision (commission or license a metric-matched font) | 6–10 + owner | | Colour emoji and colour fonts on screen and in page renders: COLR v0/v1 paint graphs (solid fills, linear, radial and sweep gradients, composite modes) and bitmap strikes (Apple Color Emoji `sbix`, Noto Color Emoji `CBDT`) drawn in the font's colours at the layout's position and size; a dark page doesn't invert them, the same as pictures | 🟡 | `fonts::color` (skrifa), `render::color_glyph`; `render::tests::color_glyphs::emoji_are_drawn_in_colour` and `emoji_keep_their_colours_on_a_dark_page` (system font, skip without one), `render::color_glyph::tests`, `fonts::color::tests` (#1269). A glyph copies at most 65,536 gradient stops and clip-path elements in all, else it falls back to its outline, and the cache charges what it keeps (#3692). CBDT is verified on a real page with Noto Color Emoji; COLR v0/v1 and sbix are implemented to the OpenType spec and tested with synthetic data, but not yet seen on a real font (Segoe UI Emoji, COLRv1 Noto, Apple Color Emoji). PDF export already drew them through krilla | 1–2 | | Full font names in document font requests | ✅ | Exact English (or first available) OpenType name ID4 lookup in loaded faces and the native lazy catalog; family and legacy-family matches keep priority. No style-suffix guessing; named variable-instance aliases remain unsupported | 0 | | Symbol fonts (Symbol including its PCL6 alias, Wingdings, Wingdings 2/3, Webdings) without the proprietary font: each character, stored as U+F020–U+F0FF or a plain 8-bit code, is drawn as its Unicode equivalent from a face that has it; PDF text and copies read as those symbols | ✅ | `doc::symbol_fonts` tables (Adobe Symbol table and Unicode L2/12-368), `layout::tests::wingdings_text_draws_and_reads_as_its_unicode_symbols` (#776). Shapes come from Noto Sans Symbols / Symbols 2, DejaVu Sans or Segoe UI Symbol, so they differ from Word's; Wingdings 0xFF (not in Unicode) still has no symbol. A line keeps the symbol font's own height (Symbol, Wingdings: the ascent and descent Word's PDFs give them), so a Symbol bullet makes its line as tall as in Word, `layout::tests::a_symbol_bullet_sizes_its_line_by_the_symbol_font`. Apple's one-em Symbol takes the same height, as in Word for Mac (`fonts::word::tests::a_one_em_symbol_face_takes_windows_symbols_line`) | 0 |