fo:min-height is a floor, not the band: LibreOffice grows it for the zone's
own lines and, in a footer, for the first paragraph's space above (probed —
a header's space below only hangs into the body). The zone paragraph now
carries those margins, so the reach counts them at its real font size and a
page with no zone of its own keeps the floor.
Word writes 1.08 into w:docDefaults, so a style declaring single spacing was
dropped as "the default anyway" and inherited 1.08 instead — every Title and
every heading that asks for 1 rendered a line too tall. The parent style is
the yardstick, which ownProps already applies.
ODF style:vertical-pos/-rel on an inline frame, which every LibreOffice
formula image carries: baseline, character area, or a plain offset from the
baseline. The default moves from the line-box bottom to the baseline, so a
line with a picture in it keeps the descent below it, as LibreOffice and
Word both do.
LibreOffice drops it at the page bottom, as it drops space above at a page
top (probed: a paragraph 8mm clear of the bottom keeps its 2cm below and
stays). Counting it pushed the last block of a page down a page too early.
A paragraph with fewer lines than orphan and widow control demand together
has no legal break point, so it moves to the next page whole — and the
heading kept with it has to follow. Measuring only its first two lines left
the heading stranded at the page foot.
Mirrors the ODF fix: a block that cannot name its style is measured against the
default paragraph style but renders at its own, so a run matching the default was
suppressed and came out at the wrong size.
A list item is measured against the default paragraph style, but it renders at
its own style's size — so a 12pt run under an 11pt ListParagraph was suppressed
as "the style supplies it" and came out 11pt. Runs are now measured against the
size the block actually gives them.
The guidance document: 15 of 16 pages start on the same line, from 1.
The 6px we put over and under every wrapped frame is a default only this editor
has: LibreOffice and Word wrap flush unless the file declares a distance. It
made a fixture's figure boxes 3mm too tall each.
One fixture: 120 → 100 parity issues, the DOCX fixtures unchanged.
A painted border is a whole pixel however thin the file declares it, and the
excess came off padding-bottom alone — a cell that declares none (a fixture's Mac
table) kept growing 0.25mm a row. What is left over now comes off padding-top.
The atomic leaf a text box becomes carried neither its space above nor its space
below, so the fit test ignored both and a page top never dropped the space above
the way it does for a paragraph. The box's space rides --space-top, which the
page-top decoration zeroes — the rotor centres itself in the padding box and has
to follow it.
The body margin reserved the zone's height *plus* its fo:margin-top/-bottom, so
every page with a footer lost a line — a fixture ran a page over. Probed against
soffice: moving a footer's fo:margin-top leaves the last body line exactly where
it was and only shifts the footer text down its band; style:dynamic-spacing
changes neither side. The band is the declared height, the gap sits in it.
One fixture paginates to LibreOffice's 63 pages again.
An as-char figure frame sits in a paragraph of its own; the importer lifts the
box to top level and dropped that paragraph whole, so its space above and below
went with it — every figure in a fixture sat 2.1mm too tight. The box now carries
them (ParagraphSpacing covers textBox), space above as padding so it adds to the
block above, and the export mints an anchor style to write both back.
One fixture: 142 → 100 parity issues.
A heading only moved down when its successor's *first* line no longer fit. But
widow-orphan control carries a lone first line over anyway, so the heading was
left stranded at the page foot — LibreOffice moves the pair. The fit test now
asks for MIN_KEPT_LINES of the successor.
Two ways a table's height was off. Its space above was a margin, so it
collapsed against the paragraph above instead of adding to it — now it rides
--space-before like a paragraph's. And every cell border paints a whole pixel
however thin the file declares it, where LibreOffice reserves the declared
width; the excess now comes off the cell's padding-bottom, 0.25mm a row.
A character style is a stylesheet rule, direct formatting an inline style on the
run's span. The charStyle mark ranked below TextStyle, so its span sat *inside*
and the rule won over the ancestor's inline style — a 9pt style silently undid a
run's own 10pt. Priority 102 lifts it above TextStyle's 101.
One fixture: 259 → 172 parity issues, lineEnd 49 → 7.
Both round-tripped through save/load already but had no way in: the
header/footer bar gains a Chapter button next to page number/count, and the
table toolbar three buttons for the cell's vertical alignment.
ODF puts fo:margin-top/-bottom on the table style and LibreOffice honours
them like a paragraph's; we dropped both, so every callout table in a fixture sat
half a line too tight and the document ran a page short. With them the Math
Guide paginates to LibreOffice's 63 pages exactly.
Only the ordinary-block push site added the space the page-top rule had
dropped above it; the index, text box, columns and table-row sites subtracted
the spacers alone, so each of those measured too high by whatever the pages
above had swallowed and got an equally oversized spacer — a fixture's figure
frames landed 16mm down their page. One naturalTopOf() now serves all six.
Two measured deviations, both worth ~1mm a row on a fixture: a cell's first block
got the space above that LibreOffice adds nowhere in a cell, and a repeating
header row rendered centred and bold because it is a <th> and the UA says so.
Pagination's page-top-drop detection now skips cell leaves, or the space that
is never there would read as a decoration to add back.
The TOC rendered every level with our 0.5cm-per-level indent, an editor-only
1.5 line height and no space above — so a fixture's contents drifted 7.6mm off
LibreOffice down one page and pushed entries onto the wrong one. The per-level
entry template names a paragraph style; the rows now carry it as data-style
and the document stylesheet does the rest. Our own indents stay the fallback
for an index whose file names none.
A manual's footer carries text:chapter, which we imported as the string the
producer happened to cache — so every page of a fixture claimed the last chapter
of the book. It is now a live field: the layer resolves the last heading at
or above its outline level to have started by that page. Round-trips to ODF
text:chapter and Word STYLEREF; PDF keeps the cached name (Chrome's print
engine has no named strings).
Import read style:vertical-align but neither exporter wrote it, so a
mid-cell callout label jumped to the row's top on every save. odf-kit's
CellOptions and docx's TableCell both take it natively; DOCX import maps
w:vAlign in as well.
A table-of-content entry template names the stop its page numbers are set
against — the deputy-standards guidance puts it 45mm inside the column,
and every number of its index hung out at the margin instead.
A table-of-content entry template that declares its tab stop without a
style:leader-char means the gap is empty — the deputy-standards guidance
has one, and got a row of dots it never asked for. Round-trips.
How many dots fill a tab or index leader is the fill's own business —
both engines end it at the same stop. The settle predicate now polls on a
timer: walking every spacer and index row each frame starved the layout
it was waiting for, and half the runs timed out.
An as-char figure frame is centred by the paragraph it sits in, and the
importer lifts it out of that paragraph — so a frame whose own style says
"from-left" landed at the margin instead of the middle of the column.
ODF style:vertical-align (middle/bottom) on a table cell, which every
LibreOffice callout table uses for its Tip/Note label. Import and render
only: odf-kit dedupes cell styles by property, so writing it back needs a
pass of its own — noted in docs/architecture/tables.md.
The inset ring was a fixed 0.15cm the editor imposed on every box, so a
figure frame — which declares 0 — sat 1.5mm right of where LibreOffice
draws it and stood 3mm taller, on every figure of the document.
An as-char text box takes its centring from the paragraph it is anchored
in, and the importer lifts it out of that paragraph — so every figure in
a fixture sat at the left margin. Carry style:horizontal-pos on the
box (an image needs none: with no side to float to it centres anyway).
Every row carried 200 dots — clipped on screen, but the clipboard, the
PDF and any measurement got all of them. Cut each to what its gap holds,
and step the levels by 0.5cm, which is what LibreOffice's Contents styles
use. The parity runner now waits for the page numbers to settle too.
Three faults in the zone layout: the wrap marker's value is '', so every
pass nested another span around the tab and added its advance again; a
stop past the line (18cm in a 17cm footer) hung the page number off the
page; and a segment measured after it had wrapped reads short by the
space the break swallowed, which kept it wrapped.
A block at a page top loses its space above, which shortens it, which
moves what follows — so the next pass read a layout its own decoration
had made, the two states alternated, and the ping-pong damper froze
whichever came first. Add the dropped space back when measuring and take
it off the flow below instead: same page, but the same one every time.
A hyperlink in a fixture's copyright footer threw generateHTML and
blanked the whole zone. Drop what the one-paragraph schema lacks, keep
its text. A master handing over to a successor is also the different-first-
page flag, so a title master with no zones leaves page one blank.
The default master was the one literally named Standard, which a document
need never reference: a fixture's body runs on OOoPageStyle, so its
footer band went unreserved and every page held ~15mm too much text.
An index longer than a page has no inner document positions for a
pagination spacer, so it now breaks itself between entries.
Two causes: rangeWidth added a rect per inline box *and* per text node, so
a segment inside a span measured double; and the pen was read back from
the DOM, where it already carried the previous pass's advance. Carrying
the pen along the line settles both, and the layout no longer depends on
how many frames pagination takes.
The rule read the padding it had just zeroed, so it flipped every pass and
the ping-pong damper froze it on whichever state came first. Read the
block's own --space-before, which the decoration doesn't touch.
style:master-page-name on a paragraph style is LibreOffice's "page break
with page style": the block always opens a page, except for the master
the document itself opens with.
The LibreOffice "page break" paragraph style carries the break on its
own end, not on the block that follows; unread, a fixture's title
page ran straight into the copyright page.
ODF text:anchor-type="page" is a cover graphic or a watermark: out of
flow, placed from its page's corner, behind the text. In flow, the two
full-page frames of a fixture's covers cost three pages.
A word processor's paragraph frame includes the space below it, so a
block whose text fits but whose spacing doesn't moves to the next page —
where the space above is then dropped, which the page-top rule missed
for a block pushed by its own spacer (its measured top still excludes
that push). Keep-with-next counts the same pair of spacings. Both probed
against LibreOffice; the OPG fixture's pages 3-6 now match it line for
line.
The style-registry path divided an ODF fo:line-height by 1.15 where the
block path, both DOCX paths and the export all treat it as the plain
percentage, so every paragraph whose spacing came from its style
rendered 15% too tight. Its suppression yardstick is the block's own
style too, so a 100% under a 115% style stays as direct formatting.
LibreOffice keeps a paragraph's space above and below in one item, so a
style that declares only one of them does not inherit the other from its
parent chain — the missing half falls back to the default paragraph
style. Probed against soffice with the OPG fixture's own styles, where
it is the difference between a heading sitting flush and 4mm too low.
Both probed against LibreOffice while chasing the render-parity corpus:
it compresses word spacing to fit one more word on a justified line
(CSS only stretches), and it drops the space above a block that a page
break put at a page top.
Steffen Becker