pdf_document 1.0.0

Document-level PDF semantics: page tree, annotations, AcroForm filling, digital signatures, and an incremental-save editor. Pure Dart, web-ready.

Changelog

1.0.0

First stable release. Changes since 0.1.0:

• Line/PolyLine/Polygon annotations: reading and authoring with the full PDF Table 176 line-ending vocabulary, plus reshaping.
• Measurement annotations (§12.9): PdfMeasure/PdfNumberFormat, scale calibration (setMeasurementScale), and addMeasurement for distance/perimeter/area with a /Measure dictionary and a baked-in formatted caption.
• True redaction: mark /Redact regions and burn the underlying content irreversibly.
• Image stamps: PdfEditor.addImageStamp places a PNG/JPEG as a stamp annotation; dashed (/D) stroke patterns for all shape subtypes; and annotation flip when a resize handle is dragged past the zero point.
• Form widgets: resizeFormWidget rewrites a field's /Rect and regenerates its appearance at the new size.
• Page assembly: PdfEditor.insertBlankPage adds a new empty page at any position (sized to request, default US Letter), and PdfDocument.extractPageRange exports a contiguous span of pages as a standalone PDF — alongside the existing appendPagesFrom (insert pages from another document) and extractPages (arbitrary subset).
• OCR text-layer injection: PdfEditor.injectTextLayer writes recognized PdfOcrSpans onto a page as invisible (render mode 3) text — sized and horizontally scaled to sit over each word — so a scanned, image-only page becomes selectable, searchable, and extractable without changing how it looks. applyOcr (with a pluggable engine) lives in dart_pdf_editor.
• PdfImageDocument: assemble a brand-new PDF from a list of PNG/JPEG images, one page per image — the pure-Dart half of image/Office ingestion (multi-page TIFF, scans, camera shots).
• PdfImportSource: a host-provided seam for converting foreign formats (DOCX/XLSX/PPTX, …) to PDF bytes. Interface only — dart-pdf does not implement OOXML→PDF layout.

0.1.0

Initial release.

• PdfDocument: page tree with inherited attributes, metadata, outlines, text-page lookup.
• PdfEditor: incremental-save editing. Annotation authoring (highlight, ink with pressure, shapes, free text, notes, stamps), flattening, page manipulation (reorder, remove, append across documents, extract), content stamping/deletion/text replacement.
• Annotations: appearance generation, resize/rotate/restyle, slicing eraser, clipboard snapshots, /NM-keyed diff + replay for sync.
• Measurements (§12.9): PdfMeasure/PdfNumberFormat (parse/emit/format), scale calibration (setMeasurementScale), and addMeasurement for distance/perimeter/area annotations with a /Measure dictionary, a formatted /Contents, and a caption baked into the appearance (PdfAnnotation.measure/measurementText).
• AcroForm: field model, filling with regenerated appearances, field administration (add/rename/remove/retype/flatten), button images.
• Digital signatures: PdfSignature.validate() with optional trust-store chain validation, and signing via saveSigned.
• Image embedding: JPEG passthrough and full baseline PNG (all bit depths/color types, tRNS, Adam7) with alpha soft masks.