dart_pdf_editor 1.0.0

Flutter PDF viewer and editor rendered natively in Dart — zooming viewer, text selection and search, annotation authoring, form filling, signatures, and page management. No platform plugins.

Changelog

1.0.0

First stable release. Highlights since 0.1.0:

• Redaction tool: mark regions and burn the content irreversibly.
• Document comparison: pixel + text diff with a synchronized compare view.
• Text reflow: a paragraph-aware reading view of extracted text.
• More annotation tools: line/polyline/polygon with the full line-ending picker, an insert-image tool, customizable dash line styles, and polygon fills.
• Text boxes: bold/italic across the standard fonts, with font, outline, and fill controls in the style popup.
• Forms: fill fields directly in reading mode, and use the form tool to select, move, resize, and rename fields.
• Per-tool style memory: each annotation tool remembers its own color, stroke, opacity, font, and line style across sessions.
• Responsive UI: a floating toolbar, side panels and the thumbnail strip become bottom sheets on small screens, and tap-to-place for text, stamps, and signatures.
• Input & performance: reduced Apple Pencil latency (forward-extrapolated prediction), single-finger scroll in pencil mode, Shift+drag marquee selection, aspect-lock and past-zero invert on resize, an eraser-size control, render pacing for smooth fast-scrolling, compact auto-dismissing snackbars, and a ⌘S / Ctrl+S save shortcut.
• Page management: PdfEditingController.addBlankPage (sized to its neighbour by default), insertPagesFrom/insertPagesFromBytes (merge pages from another PDF), and exportPages/exportPageRange (split off a standalone PDF). The thumbnail strip gained an "Add page" footer button (shown when allowPageEditing), so PdfEditorView gets it out of the box. PdfEditorView also exposes the other two in its header via onPickPdfToInsert (host returns a PDF to merge after the current page) and onExportPages (host saves the exported range); the range is chosen with the new exported showPdfPageRangeDialog.
• Pluggable OCR: PdfOcrEngine (a host-supplied recognizer — ML Kit, Tesseract WASM, a cloud API; none ships in-tree) plus PdfEditor.applyOcr(pageIndex, engine), which rasterizes the page, runs the engine, and injects an invisible selectable/searchable text layer. PdfOcrPageImage.userSpaceRect maps the engine's pixel boxes back to PDF user space (crop box and /Rotate aware).
• Reopen documents where the user left them: PdfViewport (a resolution-independent scroll-position + zoom snapshot), PdfViewerController.captureViewport/restoreViewport, PdfViewer.initialViewport, and per-document persistence in PdfEditingPreferences (viewportFor/setViewport). The PdfReader and PdfEditorView shells remember and restore each document's position automatically — pass documentId for a stable key, or let it derive one from the bytes (pdfDocumentKey).

0.1.0

Initial release.

• Drop-in widgets: PdfEditorView (the full editor — header bar with search and panel toggles, all panels, the editing toolbar, save) and PdfReader (view-only with search, page navigation, and a read-only thumbnail strip), both theme-following and configurable via PdfEditorFeatures/PdfReaderFeatures (features and tools toggle off; styling via the Material theme and PdfViewerTheme).
• PdfViewer: zooming/panning viewer with text selection, search, link navigation, page-fit modes, deep-zoom detail rendering, low-res page previews under fast scrolling (PdfPagePreviewCache + background prerender), theming (PdfViewerTheme), dark mode, and custom page colors.
• PdfEditingController + tool overlays: highlight/ink (pressure + Catmull-Rom smoothing)/shapes/free text/notes/stamps/signatures, select/move/resize/rotate with live previews, slicing eraser, clipboard, undo/redo as incremental saves.
• Measurement tools: distance/perimeter/area annotations with scale calibration (PdfMeasurementScale, showPdfScaleDialog, persisted in preferences) and a live readout chip that rides the cursor for mouse and floats above the finger for touch/stylus.
• Form filling UI: text, checkbox, radio, choice, button images, plus field administration, flattening, and a form-field highlight wash (PdfViewer.highlightFormFields, on by default).
• Panels: thumbnail sidebar with drag reorder, annotation sidebar with search and multi-select, properties panel, search results panel.
• Permissions: per-annotation read-only (/F flags + canEditAnnotation predicate) and a hide-all-annotations toggle.
• Sync surface: annotationChanges feed + applyRemoteChange for collaborative annotation stores.
• Touch/stylus support: pinch zoom, scroll fling momentum, palm rejection, Apple Pencil pressure, long-press text selection with handles, and a long-press context menu (copy/cut/paste and z-order without a right click).