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@danmolitor danmolitor released this 06 Oct 18:30
· 30 commits to main since this release
v0.28.0
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Learn about vigilant mode.

Text measured and justified the way it is drawn. Content-sized text boxes hold the line they are sized for, justified text is justified in every font, and Korean documents serialize in milliseconds. All packages share the line: engine (crates.io forme-pdf), every @formepdf/* npm package, formepdf (PyPI), forme-go (tag v0.28.0), and the VS Code extension.

Addresses #181, #182 and #186.

Changed: these move existing documents

  • Content-sized text holds its shaped line (#181). Intrinsic width summed each character's unshaped advance while the line breakers measure shaped text, so where kerning widened a word, a content-sized box (a flex item, a table column) came out a fraction of a point too narrow and the word split mid-way: "Mumbai" in IBM Plex Serif drew as "Mumba" / "i", as plain text and as nested runs alike. Intrinsic width now uses the line breakers' own measurement
  • Text with a hard break measures as its widest line. Styled runs summed every line's width, so a two-line cell (<span>Website Design</span><br><span>…</span>) claimed both lines laid end to end. Table columns holding such cells redistribute, closer to Chrome
  • Justified text is justified in every font (#186). Justification reached the glyph positions only when Knuth-Plass found a solution. When it fell back to the greedy breaker, the stretch existed only as PDF word spacing (Tw), which registered (Type0) fonts never apply, so those paragraphs were drawn ragged. Correction: the 0.26.0 notes said justified registered-font text was fixed; that held only where Knuth-Plass found a solution
  • Justified styled runs no longer overlap (#186), a regression in 0.26.0: on a justified line, each styled run started without the stretch of the run before it, so "leaders" ran into "(finance"
  • A line ending with a forced break is not justified (#186), as CSS text-align-last specifies

Fixed

  • Font subsetting builds its glyph-to-codepoint map once instead of scanning every BMP codepoint per glyph: a Korean document with 1,000 distinct syllables serializes in 85 ms instead of 4.7 s, byte-identical (#182, from @captyoungkyu's patch in the issue)

Internal

  • The README links the production-user form at formepdf.com/production
  • Intrinsic width now shapes text, so automatic table layout in a registered font is slower: a 300-row table takes 268 ms instead of 231 ms

Contributors

captyoungkyu
Assets 2
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