Changelog

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0.8.0 - 2026-07-30

Added

  • Added opt-in running page furniture through :page_furniture, with independently configured headers and footers, :default, :first, :odd, and :even variants, first-page-only and except-first-page behavior, and {{page}} and {{pages}} tokens.
  • Added complete supported page geometry shared by renderer options and bare @page rules: named and explicit page sizes, portrait and landscape forms, one-to-four-value margins, margin longhands, asymmetric layout, and explicit renderer-option precedence.
  • Added bundled DejaVu Sans regular, bold, oblique, and bold-oblique fonts for deterministic Unicode glyph fallback after requested and configured font families.
  • Added browser-parity coverage for page furniture, page-number tokens, asymmetric page geometry, paragraph fragmentation, border variants, flex and grid constraints, HTML character references, and multi-row table headers.

Changed

  • Changed :stylesheets entries to require explicit {:css, css} or {:file, path} tags. Bare strings are rejected so empty or comment-only CSS cannot be mistaken for a path and file access is always explicit.
  • Changed font loading to reuse successful parsed font files through a supervised, bounded, process-wide cache. Cache entries invalidate when file metadata changes, concurrent cold loads are deduplicated, failed parses are not retained, and no host-application configuration is required.
  • Changed the package metadata and documentation to identify the MIT, Bitstream Vera, and BSD 3-Clause licenses used by the source, bundled DejaVu fonts, and generated WHATWG character-reference data.
  • Documented that repeated page furniture uses the explicit renderer option; CSS position: fixed remains deferred until positioned layout can remove elements from normal flow and apply offsets correctly.

Fixed

  • Fixed CSS cascade precedence so stylesheet !important declarations beat normal inline declarations, while inline !important declarations retain priority over important stylesheet declarations.
  • Fixed table rowspan layout to reserve occupied columns and span the combined height of all covered rows.
  • Fixed paragraphs taller than the remaining or complete printable page being clipped or kept together indefinitely; pagination now fragments them at complete visual lines, including oversized break-inside: avoid paragraphs.
  • Fixed paginated tables repeating only one header row; all <thead> rows now repeat together when the table body continues.
  • Fixed Unicode text being rejected or encoded with the wrong face by resolving each grapheme through the selected, requested, configured, and bundled fallback fonts before layout.
  • Fixed text extraction across nested q and Q operators so saved graphics and text state is restored in LIFO order.
  • Fixed Type 0 text width calculation by mapping source codes through the Encoding CMap before applying descendant CID widths, with strict diagnostics and resource limits for unsupported or malformed CMaps.
  • Fixed merging pages with inherited or indirect MediaBox, CropBox, Resources, Rotate, BleedBox, TrimBox, ArtBox, and UserUnit values by materializing the nearest effective page-tree values.
  • Fixed the shared reader accepting duplicate page-tree references or inconsistent descendant /Count values.
  • Fixed ASCII85 decoding of delimiters, whitespace, z groups, partial final groups, and values that overflow the 32-bit group range.
  • Fixed HTML named and numeric character references using the complete WHATWG table, including legacy semicolon rules, invalid numeric normalization, multi-code-point references, non-breaking spaces, and decode-once behavior.
  • Fixed CSS custom properties being resolved before their cascade completed; ordinary declarations now use the final winning custom-property values.
  • Fixed none, hidden, dotted, dashed, solid, double, groove, ridge, inset, and outset borders, including independent side styles and transparent border spacing.
  • Fixed valid page-context declarations being rejected and malformed size, margin, orientation, marks, bleed, unknown, and incomplete declarations lacking actionable CSS diagnostics.
  • Fixed zero, negative, or excessive margins being accepted when they leave no positive printable page area.
  • Fixed merged output corrupting PDF names that require #xx escaping, including whitespace, delimiters, literal #, control bytes, and non-printable bytes.
  • Fixed unsupported named or pseudo-page selectors and misspelled @page at-rules being silently applied to every page; they now return strict diagnostics.
  • Fixed declaration-order-dependent computed CSS values by resolving em, rem, currentColor, relative semantic margins, custom properties, and inherited line heights against the element's final computed style.
  • Fixed grid minmax() tracks discarding their minimum and added redistribution when fractional tracks reach a minimum bound.
  • Fixed flex grow and shrink distribution overwriting item min-width, max-width, min-height, and max-height constraints.
  • Fixed text extraction rejecting valid inherited indirect page /Rotate values.
  • Fixed merge failures replacing the reader's machine-readable reason and diagnostic stage; callers can again distinguish encryption, page-tree, resource-limit, malformed-input, and unsupported-feature failures.
  • Fixed valid empty or comment-only inline stylesheets and paths containing braces being misclassified by replacing content-based guessing with explicit stylesheet source tags.
  • Fixed the public :default_font typespec so its documented fallback-list form accepts [String.t()].
  • Fixed a severe CSS rem performance regression that recursively traversed complete font registries and decoded runtime payloads for every element. Runtime font and image data is now opaque to CSS length resolution, with a deterministic reductions-based regression test.

0.7.0 - 2026-07-23

Added

  • Added local CSS @font-face support for embedded and configured stylesheets, including font-family, ordered src: url(...) fallbacks, font-weight, font-style, and supported font-display values.
  • Added TrueType font loading from .ttf files and .otf files that use TrueType outlines. Relative font URLs resolve against the configured stylesheet directory or renderer :base_url.
  • Added print media handling for @media print, @media only print, @media all, and @media only all, while non-print media rules are omitted from the active print cascade.
  • Added PDF document metadata through the HTML renderer's :metadata option for title, author, subject, keywords, creation date, and modification date. Metadata dates accept Date, NaiveDateTime, DateTime, and ISO 8601 strings, and non-ASCII values are written as Unicode PDF strings.
  • Added automatic PDF title metadata from the first non-empty HTML <title> when no explicit metadata title is provided.
  • Added Chromium parity coverage for CSS-declared fonts and print media, plus examples and compatibility documentation for fonts, print CSS, metadata, supported formats, URL resolution, and conversion boundaries.

Changed

  • Changed configured stylesheet handling to preserve each file's directory for relative assets and to apply configured @page rules when deriving default page options.
  • Changed explicit and CSS-declared font registration to try ordered local source candidates until a supported font loads.
  • Changed PNG decoding to stream decompression, require the exact expected decoded size, and reject images whose decoded scanlines exceed 100 MB.
  • Changed RunLengthDecode to operate on binaries and enforce the PDF reader's decoded-stream and decompression-ratio limits.
  • Changed text extraction to accumulate spans and output text without repeated list or binary copying, and capped extraction at 25,000 text spans per page with a :resource_limit_exceeded diagnostic.
  • Changed merge failures to retain the PDF reader's reason and stage in the actionable merge diagnostic.

Fixed

  • Fixed merging PDFs that contain unrelated or stale catalog objects by resolving the active catalog from the trailer's /Root reference.
  • Fixed hexadecimal strings with non-hexadecimal bytes being silently sanitized; the tokenizer now emits :invalid_hex_string with the offending byte position.
  • Fixed PDF DateTime metadata formatting so UTC and non-UTC offsets are encoded correctly.
  • Fixed CSS @font-face parsing for quoted URLs containing commas, ordered fallback sources, invalid or missing descriptors, unsupported formats, and malformed declarations.
  • Fixed CSS diagnostics for malformed font and media rules so rendering returns actionable :invalid_css details with source, line, and column context.

0.6.0 - 2026-07-20

Added

  • Added NativeElixirPdfUtilities.Pdf.Reader, a shared PDF document layer with classic cross-reference tables, cross-reference streams, object streams, incremental and hybrid revision chains, recursive indirect resolution, supported stream filters, page-tree validation, and resource limits.
  • Added committed reader fixtures for classic, xref-stream, object-stream, hybrid, incremental, encrypted, and malformed PDFs.
  • Added Text.extract_spans/2 and Text.extract_file_spans/2 for page-preserving decoded text operations with source indexes, baseline coordinates, font and matrix context, and text rendering-mode metadata.
  • Added strict Unicode decoding for standard simple-font encodings, font-specific Differences, Adobe glyph names, Type 0 fonts, and ToUnicode CMaps.
  • Added PDF reader, text extraction, and merging guides covering supported structures, public behavior, diagnostics, limits, and known boundaries.
  • Added GitHub Actions checks for compilation warnings, formatting, unused dependencies, tests, 100% coverage, Dialyzer, and Chromium browser parity.

Changed

  • Changed text extraction and PDF merging to consume the shared reader model so both utilities honor active revisions, generations, free entries, compressed objects, and the validated page tree.
  • Changed text extraction to reject malformed content and unreliable font encodings with actionable diagnostics instead of guessing or returning partial text.
  • Changed string extraction to project from the same positioned page spans while preserving the existing layout: true and layout: false output.

Fixed

  • Fixed merging pages with malformed inherited /MediaBox values by applying the default page box.
  • Fixed valid cross-reference offsets that point to PDF whitespace immediately before an indirect object header being rejected.
  • Fixed tokenizer comments ending at end-of-input being emitted as tokens.

0.5.1 - 2026-07-10

Changed

  • Merge.merge/1 now rejects malformed classic PDF input with an :invalid_pdf_input diagnostic rather than producing an empty PDF or raising.
  • NativeElixirPdfUtilities.Tokenizer now emits explicit error tokens for unterminated literal and hexadecimal strings.
  • Text.extract/2 rejects malformed token streams with an :invalid_pdf_input diagnostic. It also ignores unusually large ToUnicode CMaps to bound memory and CPU use during extraction.

Fixed

  • Fixed merge crashes caused by malformed tokens, incomplete streams, duplicate object identifiers, and invalid object identifiers.
  • Fixed merged PDFs losing inherited /MediaBox and /Resources values from intermediate /Pages tree nodes.
  • Fixed remapping of non-page /Parent references during a merge.
  • Fixed malformed TTF font input causing HTML-to-PDF rendering to crash.
  • Reduced avoidable repeated binary and list copying while writing larger PDFs.

0.5.0 - 2026-07-10

Added

  • Added NativeElixirPdfUtilities.Diagnostics as the shared public diagnostic contract.
  • Added standardized diagnostic details for merge, text extraction, HTML rendering, pagination, PDF writing, and file failures.
  • Added developer guidance for using the shared diagnostics contract in future public APIs.
  • Added a diagnostics guide under docs/.

Changed

  • Changed Merge.merge/1 to return diagnostic errors instead of raising for empty input.
  • Changed recoverable failures from merge, text extraction, HTML rendering, pagination, PDF writing, and file operations to return {:error, {reason, diagnostic}} with :stage, :reason, :message, :operation, :module, and :source context when available.

0.4.0 - 2026-07-09

Added

  • Added a Chromium-backed browser parity test suite for the supported HTML/CSS rendering surface.
  • Added browser parity fixtures for common layout, CSS cascade, tables, flexbox, grid, pagination, image, link, unit, and production-document scenarios.
  • Added browser parity coverage documentation so supported renderer behavior is tied to explicit fixtures.

Changed

  • Improved HTML-to-PDF browser accuracy for nested table, flexbox, and grid compositions.
  • Improved collapsed table border sizing and painting to better match browser output.
  • Improved @page handling in parity tests so native and Chromium renders use the same page size and margins.
  • Updated contribution guidance to require focused tests and browser parity coverage for visible HTML-to-PDF feature work.

Fixed

  • Fixed CSS custom property resolution inside supported compound values such as padding and side-specific borders.
  • Fixed box-sizing: border-box handling across block, flex, grid, table, and image layout paths.
  • Fixed table layout inside flex and grid items, and flex layout directly inside table cells.
  • Fixed declared table row heights and pagination metadata propagation for table rows.
  • Fixed pagination edge cases around first-page parent padding, overlapping parent/child groups, and zero-height metadata groups.

0.3.0 - 2026-07-08

Added

  • Added NativeElixirPdfUtilities.HtmlToPdf, a native HTML/CSS to PDF renderer for document-oriented templates.
  • Added support for common document HTML including text, headings, paragraphs, spans, lists, links, tables, images, and nested document structure.
  • Added support for common print-oriented CSS including cascade handling, box model sizing, text styling, borders, backgrounds, tables, flexbox, grid, page sizes, page breaks, and @media print behavior.
  • Added embedded image, SVG rasterization, and custom TTF font rendering support for generated PDFs.
  • Added multi-page pagination and PDF writing for rendered HTML documents.
  • Added detailed render diagnostics for invalid HTML, unsupported HTML, invalid CSS, invalid layout, and invalid document failures.
  • Added fixture coverage for purchase orders, material requisitions, stock stickers, and trim cards with realistic scrambled data.
  • Added dedicated HTML-to-PDF compatibility and examples documentation.

Changed

  • Updated the package description to include native HTML/CSS rendering.
  • Updated HexDocs metadata to include the HTML-to-PDF guides.

0.2.0 - 2026-07-03

Added

  • Added embedded text extraction so callers can consume readable text data from PDF binaries.

Changed

  • Refactored tokenizer, merge, and text internals to use explicit case/cond branching instead of guarded multi-head private functions.
  • Split tests into focused tokenizer, merge, and text suites.
  • Improved package documentation and HexDocs metadata for the release.

Fixed

  • Fixed page dictionary rewriting around empty arrays and MediaBox validation.
  • Added 100% test coverage across the current public library modules.

0.1.0 - 2025-09-08

Added

  • Initial PDF tokenizer.
  • Initial PDF merge utility.