Changelog #

5.1.1 #

Version bump to track the 5.1.1 suite.

5.1.0 #

Stop page edits dropping pages from a page tree whose intermediate /Count is too small. The /Count-trusting lookup repeated some leaves and skipped others, and removePage, movePage, insertBlankPage and appendPagesFrom rebuilt the tree from that list on a cold page cache. They now take the true leaf order.
Make whole-document page loops linear on flat page trees. Page operations, form reads, attachment listing, takeoff summaries, annotation naming and the compressor walk PdfDocument.pages once instead of calling page(i) for every index, and a page(i) lookup caches the leaf siblings after the page it finds, so a forward loop resolves each page about once. On a 3,000-page file after an annotation edit, movePage goes from 720 to 2.4 ms and a form fill from 718 to 0.8 ms.
Memoise signature validation within a revision, and let a caller reuse the expensive part across revisions. validate and validateOnline take cores: (a PdfSignatureCoreResolver) that supplies a PdfSignatureCryptoCore - digest, CMS/PKCS#1/RFC 3161 verification, certificates, signing time - for the signature and every document timestamp; PdfSignature.cryptoCore() computes one and hasSignableByteRange says whether one can exist. A PAdES document timestamp reuses its own row's validation instead of hashing again. The problems and certificates lists of a validation are now unmodifiable, since results are shared. With pdf_cos's P-521 fix, P-521 signatures validate.
Add PdfDocument.rollbackTo(length), wrapping CosDocument.rollbackTo and dropping the page-tree caches.
PdfDocument.openAppended accepts an earlier revision's prefix and takes a password for a revision whose /Encrypt differs.
PdfAcroForm.of takes an onFields hook, called once with the field list the first time anything reads it.
Add pdfFallbackDocumentId, the SHA-256 identity pdfPermanentDocumentId falls back to for a file without a trailer /ID, so callers can take the free /ID first and hash only when they need to.
Decode PNG images through pdf_cos's tolerant inflateZlib, so trailing bytes after the zlib stream no longer empty them on the web.

5.0.0 #

Breaking changes #

PdfFormFilling.setTextValue now truncates the value to the field's /MaxLen (by code point), then re-runs the form's recognised AF* calculate scripts in /CO order, rewriting the /V of calculated fields - read-only totals included. Appearances apply recognised AF* formats, draw password fields as asterisks and lay comb fields out one character per cell; /V itself stays the raw value. Callers that compared a field's appearance text to the value they set, or relied on calculated fields keeping a stale /V, will see different results.
Every fill setter (and flattenForm) now removes /AcroForm /XFA and the catalog's /NeedsRendering through the new PdfEditor.removeXfa, so an XFA-aware viewer reads the AcroForm values rather than stale XFA data. A hybrid form's XFA packet no longer survives a fill.
List-box appearances now draw every option row, with the selected rows highlighted, instead of only the chosen value - single-select list boxes too. Pixel baselines of filled list boxes change.
PdfSignature.validate() sets chainTrusted to false when revocation data embedded in the document's /DSS says a certificate in the chain is revoked, even without a trust store (unless a verified timestamp predates the revocation). embeddedRevocation now requires the issuer to have verified the signer and an OCSP response to match the full CertID, so some documents that used to report embedded revocation data no longer do.
PdfTrustStore.addCertificate and addDer gained an optional named {String? source} parameter. Subclasses that override them must add it.

Changes #

Run the built-in Acrobat AF* helpers that most real forms use, without a JavaScript engine (#930): AFSimple_Calculate and simplified field notation (re-run in /CO order after every fill, or on demand with PdfEditor.recalculateFields), AFNumber/AFPercent/AFDate/AFTime/ AFSpecial format and keystroke, and AFRange_Validate. The new PdfEditor.enterTextValue is the user-entry path: it normalises a value (1.234,50 in a comma-decimal field stores 1234.50) or throws PdfFieldInputException with the helper's message. setTextValue stays the unchecked programmatic setter. Arbitrary scripts never run; they are reported, with a reason, on PdfFormField.scripts.
Honour comb fields, /MaxLen and password masking (#931). PdfFormField.maxLength reads the inheritable /MaxLen and isComb the comb flag (with the new fileSelectFlag/combFlag constants). PdfFormFilling.setPasswordValue keeps a password out of the file (ISO 32000 12.7.4.3): it removes /V, draws a fixed-length mask so the file does not reveal the length, and writes a trailer /ID when the file has none. pdfPermanentDocumentId / pdfTrailerPermanentId return the identity such a value is filed under.
Detect XFA forms (#929): PdfAcroForm.hasXfa, xfaNeedsRendering and isDynamicXfa.
Sign encrypted (password-protected) PDFs (#935). Every signing path used to refuse them; the signature's /Contents is now written unencrypted and patched after the rest of the revision is encrypted, and validate() reads the raw CMS, which also fixes validating encrypted files signed by other tools. PAdES B-LT/B-LTA and addDocumentTimestamp reopen their intermediate revisions with the new PdfDocument.openAppended, which reuses the authenticated keys instead of the password. pyHanko validates the encrypted B-LTA output for RC4-40/128, AES-128 and AES-256.
Add form tab order (#932): PdfFormTabOrder, PdfTabOrder and PdfPage.tabOrder follow each page's /Tabs (row, column or structure order), fall back to /Annots order, and skip read-only, hidden, push-button and signature fields.
fetchAatl downloads Adobe's Approved Trust List through a host transport, verifies it chains to Adobe Root CA G2 and was signed within a year (PdfAatl.maxAge), and returns a PEM-serializable snapshot. PdfTrustStore.sourceOf names the list an anchor came from.
Check signer-chain revocation. validate() now reports a verdict for the signer and each intermediate from the document's /DSS (PdfSignatureValidation.revocation, revocationStatus), and the new validateOnline(revocationClient:) adds live OCSP-then-CRL checks through the injected PdfRevocationClient. A revoked certificate makes the chain untrusted unless a verified timestamp predates the revocation. pdfOnlineRevocationClient turns a host HTTP function into a client.
Add package:pdf_document/trust_lists.dart, opt-in trust anchors with no bundled data: fetch and XML-signature-verify the EU trusted lists (fetchEuTrustedLists, PdfTrustLists.eutl), or load an Adobe Approved Trust List file you supply (parseAatlSecuritySettings). tool/refresh_trust_lists.dart writes verified PEM snapshots.
Fill multi-select list boxes (#933). PdfFormField gains isMultiSelect (/Ff bit 22), values (a /V string or array as a list; value still returns the first entry), selectedIndices (/I, falling back to /V when /I is missing or stale) and topIndex (/TI). PdfEditor.setChoiceValues writes /V as an array of export values in option order (a plain string for exactly one, removed for none), /I as sorted indices, and scrolls /TI to the first selection. List-box appearances now draw every option row with the selected rows highlighted, for single-select list boxes too, instead of showing only the chosen value.
Author every AcroForm field type, not only text, check box and push button (#934). PdfFormAdmin gains addRadioGroup (one parent field, a kid widget per on-state with generated /AP /N and /D states) and addRadioButton to grow a group later, addComboBoxField / addListBoxField (/Opt as export/display pairs, Edit and MultiSelect flags) plus setChoiceOptions, and addSignatureField - an unsigned /FT /Sig widget (with /SigFlags 1) that saveSigned(fieldName:) and the PAdES/self-signed paths fill later. changeFieldType now converts to all of them, carrying options between choice kinds and on-states into radio groups and choice options; it refuses to retype a signed signature. Authored choice fields are drawn by the same renderer filling uses, so a new list box shows every option row (selection highlighted) and a combo box its value. PdfFormField gains the noToggleToOffFlag constant.
Stop the visible signature box clipping its detail lines. On a short, wide "sign on this line" placement the top of the first line and the bottom of the last were sliced off: the box's flat 4pt inner margin took over 40% of a ~20pt-tall box, the auto-fit loop gave up at a hard 4pt floor while the text block was still taller than the room left, and centring that overflow ran it past the clip at both ends at once. The margin is now proportional on small boxes (never more than a tenth of the shorter side), the loop shrinks to 2pt before giving up, and a block that still overflows is top-anchored so the clip can only take the tail. A signature graphic also gets the reclaimed room, so it no longer floats small in a short box.

4.5.0 #

Measure and declare the whole WinAnsi range (codes 32-255) for base-14 fonts. PdfStandardFont widths stopped at code 126 and every emitter wrote /LastChar 126, so accented text in signature boxes, free-text appearances and the OCR text layer laid out with the wrong advances or stacked.
Refuse to sign a document certified with /DocMDP /P 1 (no changes permitted): saveSigned, saveSignedEcdsa, saveSignedExternal and the PAdES paths throw CertifiedNoChangesException instead of producing a file every viewer reports as tampered with. /P 2 and /P 3 and document timestamps are unaffected.

4.4.0 #

Add persistent vertical alignment for text form fields. PdfFormField carries the alignment, form_editor regenerates appearances with it, and it survives a round trip through the document.

4.3.0 #

Add PdfVectorSnapshot.toPdfBytes and fromPdfBytes for detached, single-page PDF interchange with embedded resources and baked page rotation.
Add rectangular and polygonal page-content deletion with glyph-level text slicing. Preserve font encodings, kerning, spacing, surviving glyph positions, and path clipping state; concave lassos can erase disjoint text spans. Clip crossing vectors, images, and Form XObjects at the erase boundary, retaining their outside portions and vector curves, strokes, and dashes.
Add PdfCompressor.optimize and expand PdfEditor.compress with independent lossless cleanup, resource deduplication, TrueType/CFF font subsetting, and opt-in DPI/JPEG image optimisation. Include presets and exact per-pass size reports; preserve unsupported content and never return a larger file.
Refuse incomplete/encrypted sources and require explicit signature invalidation when optimising a signed copy.
Add PdfMerger.merge for bytes-only merging with per-input passwords.
Preserve imported AcroForm fields, default font resources, named destinations, and outline hierarchies; rename collisions and remap internal page targets.
Add PdfSplitter.split, splitRange, and splitExpression for bytes-only PDF splitting, with validated PdfPageRange batches and one-based range parsing. PdfDocument.extractPageRanges reuses an already-open document.
Document splitting examples and the extraction semantics.
Accept populatedRanges in PdfDocument.open so copied progressive buffers keep treating unfetched objects as missing.

4.2.0 #

Add PdfAnnotation.appearanceRotation, the rotation an annotation's normal appearance carries in page space. This is the annotation's own rotation, so unlike a view-space measurement it is unaffected by the page's display /Rotate.
Align dependency constraints with the dart-pdf 4.2.0 package suite.

4.1.0 #

Add document-level content movement between positions and pages, retaining resource references and clipping the moved content to its destination page.
Preserve reusable annotation snapshots and digital-signature removal through incremental edits.
Align dependency constraints with the dart-pdf 4.1.0 package suite and update archive to 4.2.0.

4.0.0 #

Allow flattenAnnotations to target a supplied annotation selection and expose embedded-font descent metrics for accurate free-text box fitting.
Flatten empty text, choice, and button widgets without dropping their annotation appearance or blocking the rest of a form.
Lockstep major release for the dart-pdf 4.0.0 package suite. The pdf_document public API changes in this release are additive.

3.8.0 #

Add the lazily materialized PdfDocument.pages view and keep document caches coherent through CosDocument.revision.
Add PdfEditImpact.pageOrderOnly and reconcile page-order-only incremental edits without rebuilding unchanged page objects.
Reduce repeated page-tree and annotation work during large-document startup, structural edits, undo, and redo.

3.7.0 #

Add SimpleFont, the simple-font counterpart to Type0Font: one place that resolves a character code to text the way the renderer does (/ToUnicode, /Encoding /Differences, the built-in Symbol and ZapfDingbats encodings, then the base encoding), plus the reverse table for re-encoding replacements and the /Widths lookup.
Fix content editing against fonts that remap their codes. PdfPageElements decoded a simple font's show string as Latin-1, so a subsetted font reported text such as -=>-/>?-?@ for a page reading 05/08/2026, and replacements were written back as raw code units. Element text, both run codecs, the ' and " operators, and paragraph reflow now all go through the font's own encoding.
Restrict a replacement to codes the font actually declares - a glyph name from the base encoding or /Differences, or a /ToUnicode entry - so a subset that dropped a character declines the edit instead of drawing notdef. Decoding keeps its lenient Latin-1 fallback. A named base encoding declares printable ASCII (0x20-0x7E) per Annex D.
Move the Adobe glyph-name tables down from pdf_graphics to src/fonts/encodings.dart and export them, so the content editor and the font engine share one copy.

3.6.0 #

Read Bluebeam FreeText paragraph styling from /DS and rich-text /RC when standard PDF entries are absent, preserving alignment, leading, character spacing, horizontal scale, and underline when editing or regenerating an appearance.
Let FreeText annotations participate in opacity restyling, write opacity on creation, and rebuild their appearances without losing the selected alpha.

3.5.1 #

Lockstep patch release for the scanned-page rendering fixes in pdf_cos, pdf_graphics, and dart_pdf_editor. No public document API changes.

3.5.0 #

Let PdfDocument.openSource expose its requested first-paint page count as a temporary page-count hint when the source deliberately omits the rest of the page-tree walk. The full document opened during progressive handoff remains authoritative, while sparse page-one previews avoid recovery-scanning every intentionally absent leaf reference.

3.4.0 #

Preserve the unresolved vector template on authored stamp annotations and expose it through PdfAnnotation.stampTemplate, allowing a placed stamp to return to a reusable collection without losing dynamic fields (#651).

3.3.1 #

Fix annotation property edits duplicating the annotation when a page stores its /Annots array indirectly (#638).
Preserve embedded font resources when changing FreeText colour, so restyled text continues to use the original embedded typeface (#641).

3.3.0 #

Add lightweight diagnostics to PdfDiskCache for hits, misses, writes, oversize rejections, evictions, and byte totals, with resetStats() and a one-line debugStats summary. Manifest writes are coalesced across bursts so persistent page-raster caches do not rewrite an O(n) manifest for every entry (#615).

3.2.0 #

Improve FreeText callout interoperability: recognize third-party callouts from their /CL geometry when /IT is missing or private, and clamp malformed or negative /RD insets to a usable callout text box (#621).

3.1.1 #

Lockstep patch release to align the dart-pdf package suite at 3.1.1. No public pdf_document API changes since 3.1.0.

3.1.0 #

Add PdfEditor.compress()/PdfCompressionResult: lossless file-size compaction on save. A whole-graph reachability pass drops the dead objects incremental edits accumulate, non-stream objects pack into object streams, and uncompressed streams are re-deflated (kept only when smaller). Never returns a larger file, includes pending edits, and refuses encrypted documents. Decoded stream content is preserved bit-for-bit (#368).
Hyperlink authoring: addLinkToUri / addLinkToDestination / addLinkToPage, mirroring the text-markup creators' quad shape so a text selection turns into a link. /Rect bounds the quads, each quad becomes an active /QuadPoints region, /Border is suppressed by default, and an underline or border decoration bakes an /AP (#500).
Crop placed images: the image-stamp appearance bakes a normalized crop rect, read back via PdfAnnotation.imageStampCrop; opacity restyles and resizes preserve the crop (#504).
Render digital-signature boxes in the signer's local timezone (#570).
Add PdfAnnotation.isPrint (§12.5.3 print-vs-screen visibility) (#546).

3.0.0 #

Lockstep major release (a breaking change in dart_pdf_editor moves the whole suite to 3.0.0). pdf_document's own public API is additive.

Add PdfEditor.saveSignedExternal: delegates the RSA operation to a PdfExternalSigner callback so the private key can stay in a hardware keystore (Android KeyStore, iOS Keychain). PdfSignatureAppearance gains overridable signedByLabel/dateLabel/reasonLabel/locationLabel, and the visible /M and signature-box date now preserve a non-UTC signingTime's offset (UTC input unchanged) (#507).
Fix signature appearance detail text being clipped at the top of the signature box (#468).

2.1.0 #

Cache PdfPage instances instead of rebuilding them per access, resolving inherited attributes live: a page holds only ancestor-derived values and reads its own /Rotate, /MediaBox, /CropBox, and /Resources from the dictionary, so the cache cannot serve a stale value after an edit (#418).
Resolve pageIndexOf in O(1) through an identity map rather than walking the page tree (#397).
Resolve a form widget to its page in O(1), cache the widget list, and hoist the /Widths lookup out of the per-glyph loop (#406).
Reuse the caller's element snapshot on a targeted edit instead of re-enumerating the page's elements (#402).
Support the incremental append save path (CosUpdater.saveTail()), so an incremental revision costs the size of the change (#413).

2.0.0 #

Major version bump for the 2.0.0 package suite (breaking change in dart_pdf_editor; the document API is source-compatible with 1.4.7).
Open documents from an asynchronous PdfByteSource so a remote or large local PDF can be rendered progressively as bytes arrive, rather than after the whole file is in memory (#328).
One-tap self-signed signing identities: PdfSigningIdentity.generate (P-256 keygen + X.509 v3 self-signed cert) with toPem/fromPem persistence, PdfEditor.saveSelfSigned / saveSignedEcdsa / saveSelfSignedPades (ECDSA CMS), a default TSA (PdfDefaultTimestampAuthority) for trusted B-T time, and org-CA mode (PdfSigningIdentity.generateCa + ca.issue(...)) so members chain to a shared CA (#337).
Sigstore/Fulcio keyless signing (Tier 3): fulcioSigningIdentity mints an ephemeral P-256 key, proves possession, requests a short-lived certificate from a Fulcio v2 authority (transport injected like the TSA), and wraps the chain in a PdfSigningIdentity to sign B-T (#322, #355).
Internal refactors with no public API change: consolidate the composite-font path into one Type0Font module and one shared TextRunRewriter, and route text-box appearance generation through a single shared builder.

1.4.7 #

Add a visible signature box for saveSigned/saveSignedPades: PdfSignatureAppearance describes the widget's page/rect, optional handwritten-signature or logo graphic, detail-line show flags, and background/border/text colours, rendered into the /AP /N form (name or graphic on the left, "Digitally signed by / Date / Reason / Location" auto-sized on the right). Output is byte-identical when no box is requested; document timestamps never get an appearance (#298).
Round the corners of /Square annotations: ContentWriter.roundedRect bakes the radius into the /AP, persisted in /Border (§12.5.4) so it survives resize; restyleAnnotation(cornerRadius:) rounds or re-squares a placed rectangle in place (#297).
Separate cloud/dash pattern scale from stroke width: the multiplier persists on /BE /I (PdfAnnotation.cloudBorderScale) and restyleAnnotation(cloudScale:) reproduces it across restyle and reshape; a cloud's /Rect is re-derived from the padded footprint so growing scallops no longer clip (#300).
Recolour captured vector snapshots: PdfVectorSnapshotEditing gains isVectorSnapshotStamp and recolorVectorSnapshot, which forces every fill/stroke colour operator in the captured Form XObject to a target ink (recursing into nested forms, forking a private /Cap copy so other pastes keep their colours) while leaving geometry and images untouched; paste marks the stamp (DartPdfVectorSnapshot) (#301).
Curl revision-cloud scallops inward with a trailing-foot lean for the hand-drawn look, keeping the outward apex extent (and BBox) unchanged (#295).
Fill cloudy /Polygon annotations along the scalloped cloud path (fill+stroke in one pass) so the interior colour reaches the cloud edges (#287).
Free-text appearances support line spacing, character spacing (Tc), horizontal glyph scaling (Tz), and underline (per box and per rich run), round-tripping through the annotation dictionary and /RC.
Regenerate embedded-font and rich free-text boxes on resize (re-wrapping in the recovered face and preserving per-run styling) instead of falling back to the appearance stretch.

1.4.6 #

Add operation-scoped page-content text replacement and expose the active font resource on text element snapshots for selection-driven editing.

1.4.5 #

Version bump to keep the dart-pdf package suite aligned at 1.4.5. No document API changes since 1.4.4.

1.4.4 #

Version bump to keep the dart-pdf package suite aligned at 1.4.4. No document API changes since 1.4.3.

1.4.3 #

Add PdfBlankDocument.create for building standalone PDFs with one or more empty pages in a chosen standard or custom page size.
Keep AcroForm text, button, and image appearances upright when fields are authored, filled, resized, or regenerated on rotated pages.

1.4.2 #

Version bump to keep the dart-pdf package suite aligned at 1.4.2. No document API changes since 1.4.1.

1.4.1 #

Add callout annotation authoring and editing, and correct cloudy polygon geometry and appearance generation.
Add rich-text styling for in-place content text edits while preserving the surrounding PDF content structure.
Centralize annotation capability policy and mutation impact tracking so editing operations invalidate only the document surfaces they change.
Improve annotation, form, outline, page, redaction, reflow, and content editing robustness through the shared transaction path.

1.4.0 #

Add document color-processing APIs that discover paint colors, replace multiple source colors in one pass, support page ranges, tolerance, and transparent replacements.
Add cloudy polygon annotation appearance generation and resizing support for cloud-style shape markups.
Improve annotation/page editing support used by the editor UI, including page-range extraction and more robust annotation duplication workflows.

1.3.2 #

Add vector stamp templates (PdfStampTemplate and PdfStampTemplateComponent) with text, shapes, images, and saved-signature components. PdfEditor.addTemplateStamp writes them as normal stamp annotations with generated appearance streams.
Stamp annotations can carry metadata (stampType and stampTags) and resolve dynamic {{field}} placeholders at placement time.
Note and stamp appearances now account for page rotation when authored, so oriented pages receive counter-rotated annotation appearances.

1.3.1 #

Annotation editing now handles malformed or indirect page /Annots entries consistently when adding, removing, reordering, flattening, signing, form editing, redacting, and pasting annotations. Invalid indirect /Annots values are left untouched and replaced by a valid page-owned array.
Content rewriting, redaction, and structure-tagging paths now share the COS content-stream serializer, including inline-image round-tripping.

1.2.3 #

Free-text annotations carry a horizontal alignment (left/center/right) through the /Q quadding: addFreeText and addFreeTextRich take an align argument, PdfFreeTextStyle.alignment reads it back, and resizing or re-editing a box preserves it. Omitting align keeps the previous behaviour - left for LTR text, right for RTL.
Fix a free-text box auto-sized to its contents wrapping the last word onto a new line: the wrapper's strict width test now tolerates the sub-point floating-point round-off in (lineWidth + 2*pad) - 2*pad.

1.2.2 #

Embeddable fonts: PdfEmbeddedFont.parse reads a TrueType (.ttf) or OpenType (.otf) file and addFreeText can now author text in it, embedding the font as a full-Unicode Type0/CIDFontType2 (Identity-H) composite with a /ToUnicode CMap - so authored text can use any font, not just the base-14 faces, and stays selectable, searchable, and portable. PdfEmbeddedFont.fromFreeText recovers the font from a box's own appearance for lossless re-editing.
Fix non-Latin characters rendering as ?? in free-text annotation appearances.
Fix free-text annotation appearances rendering sideways on rotated pages.
Right-to-left text direction support in free-text annotations and AcroForm field appearances.
Faster batch annotation deletion.

1.2.1 #

Add a package example for pub.dev scoring.

1.2.0 #

OCR text-layer injection is now used by the standalone app's downloadable on-device OCR flow.
Version bump to keep the dart-pdf package suite aligned at 1.2.0.

1.1.0 #

Page rotation: PdfEditor.rotatePages(indices, degrees) turns the named pages clockwise by a multiple of 90° (negative for counterclockwise), accumulating onto each page's current /Rotate.
Vector snapshots: PdfEditor.captureVectorSnapshot captures a page region as detached vector graphics (PdfVectorSnapshot) and pasteVectorSnapshot re-materializes it onto any page as a /Stamp annotation whose appearance draws the captured content, so a snapshot pasted back into the PDF stays vector (crisp at any zoom), Bluebeam-style.
Count tool: PdfEditor.addCheckMark places a Bluebeam-style check-mark stamp annotation (with PdfAnnotation.isCheckMark/iconName). It is the building block for a running on-page tally.
Fix: JPEG 2000 tile-part desynchronization, and indexed Lab color palettes now decode correctly.

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. 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. This is 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.

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