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pdfHTML 6.3.4

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@aapsasha aapsasha released this 01 Oct 10:45
· 3 commits to develop since this release
6.3.4
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pdfHTML is an iText Core add-on for creating PDF from HTML/XML (and associated CSS).

TThis release adds initial support for HTML vertical text rendering in pdfHTML. It supports the CSS vertical writing modes writing-mode: vertical-rl and writing-mode: vertical-lr when they're combined with text-orientation: upright, helping align generated PDFs more closely with browser behavior for East Asian (CJK) documents.

Although the implementation is not complete, we have finalized the vertical text API and improved the way pdfHTML handles vertical layout calculations, word wrapping, text rise, and related CSS property interactions. This includes broader coverage for spacing, overflow, alignment, decorations, floats, inline vertical alignment, images, inline blocks, mixed font sizes, and min-max width behavior in complex layouts.

In addition, this release improves quality and robustness for vertical writing scenarios with expanded CJK font and vertical text validation, plus tests for extreme values and boundary conditions to help guard against stability issues such as infinite loops and null pointer exceptions during conversion.

We've also improved PDF/UA language attribute handling during partial HTML element conversion, so empty language attributes are handled more consistently.

New Feature

  • DEVSIX-9749 - DEVSIX-10161 - Improve HTML vertical text drawing

Improvements

  • DDEVSIX-10190 - Finalize vertical text API

  • DEVSIX-10175 - Improve setting language for partial html element conversion

  • DEVSIX-10156 - Create extensive test suite for CJK fonts and vertical text

  • DEVSIX-10184 - Test min-max width behavior with vertical text

  • DEVSIX-10129 - Create test suite for vertical text drawing properties such as spacing, overflow, alignment, decorations, floats, inline vertical alignment, images, inline blocks, and mixed font sizes.

Bug Fixes

  • DEVSIX-10195 - Added extreme-value and boundary-condition coverage for vertical writing to guard against stability failures such as infinite loops and null pointer exceptions during conversion.

  • DEVSIX-10133 - Corrected PDF/UA handling for partial HTML conversion when empty language attributes are present.

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