The MathML operator dictionary makes ( [ { | stretchy, so a plain bracket grew
to the tallest thing in its row — next to a sum with a fraction, C(b) came out
in full row height. Only a fence node emits stretchy brackets now.
The 1x1 fixture carried an IDAT from a different image: its CRC fails and the
zlib stream is truncated. Chromium and WebKit render it anyway, Firefox reports
"Image corrupt or truncated", and the same bytes sat in eleven fixtures.
Header and footer go first, each with its own ops, and a variant flag is
flipped while a zone is open. The round trip compares a list's drawn kind and
marker rather than its node type and style name — a list that loses its name to
a formatted marker carries the style's own char — and skips the marks of an
inline atom, which no file keeps. A caret is snapped to a text position, a
swallowed File-menu click is retried, and WebKit's converging ResizeObserver
round is no page error. A new corpus pair brings all six zones through the
import path; the baseline holds it and a re-recorded showcase entry.
A page break reaches the file only from a body block or a list item — a cell,
a frame and a note body all drop it — and an indent on a list item's paragraph
is the same; a plugin sweeps both. A note anchor keeps no marks and stays out
of a text box. Sub- and superscript exclude each other, a font stack the
contenteditable leaves behind keeps its first family, and a weight Bold already
claims is no second attribute. A table's first row is all header cells or none
(the promotion carrying each cell's own attrs), a replace into a table reads the
lost column weight back from the column, and a list item holds no table.
Three regression tests for what a 5000-seed sweep turned up, each checked to
fail without its fix. A run repeating its style's own plain underline is
lossy by design, so the generator no longer puts one under a named style.
tests/layout/baseline.json records where each page starts and what the load cost, per
engine and platform; a page starting elsewhere is a layout change the run prints page by
page, a load over three times its recorded time a regression, and LAYOUT_UPDATE=1 records
it again. The monkey draws frame sizes, wraps, alignment and column counts too, holds the
history against the edits rather than the caches the editor recomputes, and leaves it
unchecked where the columns flow rewrote the document outside it. The differences both
importers make by design are named in the comparison; unhoist moved to normalize.ts.
An .odt kept only the first paragraph of a list item; the rest ride it SEG-separated and
are split back out inside the same item. A header row the table did not ask to repeat
came back as ordinary cells, and only DOCX wrote it. An endnote's picture pointed at a
relationship the package never minted, and neither note's pictures were read through
their own part's relationships. A frame band-wrapped flush left is at no side of its own.
Blocks wrapped into columns drop a page break nothing there honours, and a cell's content
expression now says what both exporters can write into one.
lo-fuzz.test.ts hands every fuzz seed to LibreOffice as .odt and .docx and
compares what comes back, listing the differences LibreOffice makes by design.
test:layout opens the corpus, the showcase and fuzz seeds in the browser, holds
the page count against LibreOffice and checks the lines for overlap, margin
escapes and stranded headings. test:monkey types at random on corpus documents
and asserts the schema, undo to the start, redo, and that both saved formats
read back. browser.mjs now carries the dev server and the settle helper.
A section opening on a side hands its one-page master over to a follow-up
master instead of asking for a right-only page, which doubled the page count.
DOCX names its default style Normal and marks it as the default, zone tabs
stay tabs, footnote numbering rides in the section properties, and w:position
counts half-points. The importer keeps content controls, shape text boxes and
index page numbers, and opens no phantom section on the leading master.
Editing rejects the nesting the formats cannot hold, note repairs ride the
undo history, and the showcase files are rebuilt.
tests/fuzzOptions.ts generates styles, outline numbering, sections with
zones, margins, paper and page numbering, decor, line numbering, notes and
metadata; the round trip compares per-section effective values, and what a
format has no place for is listed as lossy. The xmllint part of
schema-validation.test.ts moves to tests/schemaValidate.ts (one call per
schema) and a third leg validates every seed as ODT and DOCX. FUZZ_SEEDS
and SCHEMA_SEEDS widen the sweep.
Found with the showcase documents and by fuzzing the export options through
the round trip and the schemas. ODT: a style's line spacing as a percentage,
section masters laid out from their own zones, variants in schema order, the
watermark on section pages, NCName-encoded style names. DOCX: a section begins
a page, odd/even and w:fmt document-wide, styles with line spacing, shading and
borders, w:numPr and w:pBdr in order. Both importers: the next style, page
setup and text width per section. Editor: chapter counters via counter-set,
a heading in columns stays with its text.
GitHub Pages serves a .dic as text/x-c and leaves it uncompressed, while
text/plain goes out gzipped: the English list cost 552 KB over the wire
where 191 KB would do. Only the fetch path changes; the mount name the
checker sees stays <code>.dic. Measured first load 1.83 → 1.70 MB.
openApp() launches chromium, firefox or webkit from playwright-core; the smoke
and DOM runs pass in each. CI runs both per engine, WebKit on macOS for
Safari's text shaping. build.target is set explicitly to the browsers the
bundle promises. CLAUDE.md is back under its 120-line budget.
Brave ships with the File System Access API off, so a save is a download and
the browser's dialog cannot hand a changed name back: the bytes must be built
in the format chosen beforehand, or a renamed file carries the other format.
One entry per format settles that on every route, the DOCX export entry goes
as its duplicate, and the DOM run covers the download route.
A click lands wherever the element's centre happens to be, and a break before
the empty last paragraph yields no page; the editor's focus() lands on the next
animation frame, so a key sent before it was lost now and then.
Chrome's macOS save panel shows no format popup and admits only the first
picker type's extensions, so a second type could never be chosen there. Both
extensions now share one type, for documents and templates alike, and the
typed extension decides what is written. A document without a file saves
through that same picker, and the Save entry no longer names .odt.
A list of timestamps in both file menus paid for itself only on the day
something went wrong, and it was in the way on every other. The entries
are gone; loadDocument now offers the versions where the browser copy has
actually failed the reader — newest first, one question each, and the one
taken up starts under the boot flag like any other document. The store
loses its reactive singleton with them.
The name decides which file the next save writes, so it belongs in the
checksum beside the text and the page setup. The DOM run renames a
freshly opened document and expects the dot.
It is now an FNV-1a checksum over the text plus everything exportArgs()
hands the exporter, so a margin preset marks the document as much as a
keystroke does and an undo back to the saved state clears it again. The
page count stays out — a late-loading font must not mark anything. The
beat is throttled, not debounced, and the baseline is taken on the spot
instead of in the timer, which a repagination can push past a first edit.
The DOM run checks all four states.
npm run test:dom opens a corpus document in headless Chromium and holds
its page count against a settle, a reload, a zoom, a page break and its
undo, plus the unsaved dot — the components the vitest suite cannot see.
The smoke run now shares its boot with it (tests/browser.mjs).
One version every five minutes goes into an IndexedDB store, pictures
inline, and both file menus list them by time; a click puts that text
back and leaves the page setup, the styles and the zones alone. The
browser copy is one document deep, so a bad edit had nothing behind it.
The picker lists .odt and .docx, and the chosen extension decides which
exporter runs and which format the document keeps — no silent switch to
.odt for a file that came in as .docx. Both save paths now build their
bytes through one helper instead of repeating the argument list.
A caret move recounted every word; a blank title serialized the whole
document to JSON on every transaction. The count now runs once per changed
document, deferred off the keystroke, and the placeholder reads the first
heading straight off the document.
The heading constants move to styles/headings.ts and the filename logic to
storage/documentName.ts, which were all the editor needed of the exporter
at startup. Main chunk 2.1 MB → 1.37 MB (gzip 615 KB → 411 KB).
A reload that cut a slow start short looked like a freeze, and the parked
document was reachable only through the browser's storage tools. The user
is asked for another try; only declining parks it.
The 1 s debounce lost a tab closed inside it. Writes now queue behind each
other, so an older write finishing late can neither store an older document
nor sweep the pictures a newer one added; a page revived from the
back/forward cache writes again.
A STYLEREF field's result runs are the chapter a reader shows before it
repaginates. The DOCX import dropped them and set the field's text empty, so a
header saved as .docx came back with a blank running head. ODF kept it.
Found by comparing the header and footer zones on a round trip, which nothing
did — they are documents of their own and hold what only they can. The corpus
gains two legs besides: a second save, and Word's dialect on its way out as ODT.
The corpus legs pass seven of the exporters' nineteen arguments, so the other
twelve — note configuration, page decoration, line and page numbering, the
header/footer zones, document properties — were never round-tripped from a
file. A new unit test sets all of them and reads them back out of both formats.
The kitchen sink had only ever been written, never imported; it now makes both
round trips and comes back identical. Two fixture repairs it needed: notes in
anchor order, and a section break with sections to open.
Caught: a document holding no note yet lost its note configuration on .docx.
The corpus leg out of one format and into the other compared block types and
text, so anything the trip dropped below that passed. It now compares every
attribute each node carries, with the values a format states in its own units
excluded: proportional vs absolute column widths, and a formula's inline flag,
which ODF has no place for.
Two the stricter leg caught: a note lost the paragraph style it names and fell
to the stock 10pt, and a link stored an attribute equal to its default.
A header row is w:tblHeader on the row, the same thing ODF spells with
<table:table-header-rows>. An index's leader and tab stop ride its first row,
the level styles are a family per kind, and the stop is written even with no
page number running to it. A box carries its own ring (w:bodyPr/@lIns) and
where it sits across the column when behind the text.
A section past the first now names its zones even when blank: a sectPr
without a headerReference is Word's Link to Previous, which put a chapter's
running head on the pages a blank section was meant for.
15-chapters carries what only a stylesheet holds: numbering on the heading
styles and two heading styles of the document's own. The round-trip legs now
carry that stylesheet too — a style the file names but the built-ins never
heard of can only be written from there — and one absolute assertion says the
chapters read as headings, which a round trip cannot: both its sides go
through the same importer, so a consistent misreading compares equal.
A numbered heading style rides the package's factory slot; a second definition
under the same id leaves two, and LibreOffice reads the first.
Chapter numbering rides the heading styles' w:numPr, so re-import read every
chapter as a list item — which swallowed the page break in front of it, since
the break is read for body paragraphs only. Headings now also write their own
w:outlineLvl, so a document setting its chapters in a style of its own
("Appendix 1") keeps them headings. SVG goes out rasterized: Word reads none,
and the importer makes one of every EMF too.
The corpus cross-format leg now carries the file's own stylesheet, where both
the numbering and a heading's style live; measured on one fixture, the leg
ODT → .docx → back loses 0 of 34 headings and 0 of 7 page breaks, was 7 and 7.
Comparison stopped at the first divergence on a page, so one displaced line
reported every line behind it and a slipped page hid what followed: a
468-page reference reported 4 differences while hiding 465 pages. The line
streams are aligned instead — nearest resync within 60 lines, contiguous
divergences merged, neighbouring lines off by the same amount collapsed to
a count — and it reports 5766. Reference PDFs are cached by file hash
(corpus 9:00 cold against 5:41 cached), each run prints its counts against
the last, and --quick skips what measured over 50 pages.
ODF says it with style:page-usage right/left on the section's page layout (read
only where the master is no half of a mirrored pair, which alternates by itself),
Word with a w:type oddPage/evenPage section break; both insert the blank page the
side needs, and so does pagination now — the printed number decides the side.
In the ribbon's Breaks menu under "This section". Measured against the reference
that keeps LibreOffice's own blank pages: the largest fixture 875 → 774 reports,
another 25 → 30 with its page count 27 → 29 against LibreOffice's 32.
Its PDF export drops auto-inserted blank pages unless IsSkipEmptyPages=false is
passed, so a document whose chapters open on a right page was measured against a
reference several sheets short of what LibreOffice lays out: 456 pages against 468
on the largest fixture, 28 against 32 on another. The corpus total rises on the
honest reference — that is drift the old one hid, not new drift.
Probed: restart the numbering at 2 on the third sheet of a mirrored document and
LibreOffice puts sheets 2 and 3 both at the outer margin with the left-page zone —
two left pages in a row. Restart at 5 and the parity stays with the sheets. Mirrored
margins, the page border and the odd/even zone now all read `printedPageNumber`.
On a fixture built for it the sheets went 15.0/30.1 → 30.1/15.0mm, LibreOffice's
30.0/15.0. One fixture rises 26 → 62 reports, all downstream of a page-count defect
there: its heads now agree with the numbers we print instead of another layout's sheets.
The inner/outer pair was read from a file, rendered and written back, but nothing
could turn it on — a book layout could only be inherited. Both margin UIs get a
checkbox beside the four fields, and while it is on the left/right fields read
Inner/Outer. A margin preset changes the values, not whether the setup is a book.
`withMirrored` keeps the key absent rather than false, so an unmirrored page setup
still compares equal. Driven headlessly: ticking it stores the flag, renames the
fields and moves an even page's text by the difference (1.5/3cm → 57px).
Two traps cost an afternoon: an uncompressed mimetype entry, or LibreOffice
produces no PDF for the file at all, and a font name with no font-face
declaration, which it then resolves differently from the editor — inventing a
0.4mm-per-line difference that no real document has. Plus the note that a
LibreOffice shipping its own Liberation/Carlito copies needs no font install.
LibreOffice's compatibility option (ODF AddParaTableSpacingAtStart, Word's
w:suppressSpBfAfterPgBrk read the other way round). Off, the block that opens a
page loses its space above however the page broke — probed by flipping the flag
in one 63-page document, whose chapter heading then moved from 25.4mm to 20.0mm,
which is where the editor had been drawing every one of them. On is the default
both products write, and both formats carry the flag back out. Fixture 244 → 160.
Probed: a header of one 10pt line with a 12mm bottom margin puts the body at the
band's min-height, not 12mm lower, and a footer's trailing margin is dropped the
same way — while a margin between two of the zone's paragraphs counts in full
(two lines 12mm apart give a 20.16mm band). The collapsed zone paragraph carries
only the margins between its source paragraphs now. One 16-page fixture went
183 reports → 5, its body having sat 10.3mm low on every page.
The edge→zone distance was document-wide, so an index whose header starts 4cm
down had its body open 14.5mm too high and the page under it followed. HfSet
carries the section's own pair (and its first page's, where the page style hands
over): ODF's page-layout margin is that distance, Word's is w:pgMar
w:header/w:footer, and both exports write it back.
Both importers capped every side at 10cm, which is the Layout panel's limit and
no file's: a back cover pushing its last lines to the page foot with a 21cm top
margin rendered 11cm high. fitMargins caps only what would leave the page no
strip of text at all, and the zone distances follow the page's own height.
A chapter number set far larger than its title shares the title's baseline but
starts a long way above it, so banding by the top alone read one line as two
and stopped the comparison at the first chapter opening. Words carry their
height now, and a word joins the line it overlaps by half the shorter box.
Corpus unchanged at 9.
The outline level's character style, its indent and the stop its label's tab
runs to were never read, so a 96pt grey chapter number rendered at the
heading's own size and everything under it sat ~30mm high. The label is an
inline block now — one set larger than its heading grows the line as both
products grow it — hung out of the paragraph's indent with the level's stop as
its minimum width. text-indent inherits into that block and would shrink it by
exactly what it hangs out, so the label zeroes it. Both formats carry all of it
back out (ODF's label alignment, Word's w:suff / w:ind / w:rPr).
Corrects two probed claims that measurement contradicted: a hard page break
does *not* swallow the block's space above (only an automatic one does), and
the header band is max(declared height, content + gap) rather than a line
count. Adds the chapter-numbering model, the mirrored master pair, and the
harness ceiling a CSS-drawn label is.
A numbered thesis lost every "1.", "2.1.4" and "A." on import: the outline
definition was read as a list wrapping headings and dropped. It is now a
document-level definition on the style sheet (format, prefix, suffix,
display-levels, start per level), drawn by CSS counters that reset down the
levels, and carried by both formats — ODF's text:outline-style, Word's
multilevel numbering bound to the heading styles. The contents rows count the
same way, since no text walk can read a CSS counter.
LibreOffice's Left Page / Right Page chain into each other through
style:next-style-name, which was read as the different-first-page idiom: one
master's geometry and zones governed the whole section, so a book-style body
lost its running head on every second page and its inner/outer margins with
it. A next-style cycle now becomes one mirrored setup — the right page's
geometry, the left page's zones as the even variant — and style:page-usage
left/right marks the margins as mirrored.
A roman front matter before a decimal body is one page style before another
in ODF and one w:pgNumType per section in Word, not a document setting — read
as one, its pages printed 1, 3 where the reference prints i, iii. HfSet grows
pageNumberFormat, both exports write it back, and the DOCX importer takes the
document's own format from the first section, as it already does the paper.
Steffen Becker