feat(write): cell styles for xlsx and ods - #90

Merged

vaceslav merged 11 commits into

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feat/write-styles

Oct 4, 2026

Commits on Oct 4, 2026

docs(write): spec for styled and columnar export — cell styles, sheet layout, column batches, zip of csv sheets
vaceslav
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18970b9
docs(write): plan for styled export part 1 — cell styles
vaceslav
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04adedc
feat(write): the cell style model — colour, font, border, alignment, wrap; StyleId
vaceslav
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17db548
feat(write): number and date format codes — a supported subset of Excel's, refused when outside it
vaceslav
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6a7be61
fix(write): refuse forbidden characters in escaped date-format literals
vaceslav
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91e10e1
feat(write): register styles and write styled cells; the style index reaches every format, csv ignores it
vaceslav
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e470fe6
feat(write): xlsx styles — fills, fonts, borders, alignment, number and date formats, resolved per kind on first use
vaceslav
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cc8a4ed
feat(write): ods styles — common cell styles and data styles in styles.xml, written at the end
vaceslav
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a01961a
test(write): nothing allocated per styled cell in any format; document styles
vaceslav
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f2e5ded
fix(write): xlsx reader keeps quoted literals literal; StyleId is stamped per writer; escape surrogate pairs and control characters in format codes; tidy style constants and docs
vaceslav
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c937f02
test(write): run the allocation-counting tests in a non-parallel collection
vaceslav
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1020bc6