PDF Document Processing Using Syncfusion Flutter PDF Library

Create, edit, and save PDF documents (.pdf) using the Syncfusion Flutter PDF library. This skill supports generating Dart code snippets for Flutter projects targeting mobile, web, and desktop platforms.

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Generate Dart Code for the User's Flutter Project (default)

Trigger keywords: "show me how", "how to", "how can I", "how do I", "provide code", "provide an example", "give an example", "demonstrate", "code snippet", "sample code", "example", "sample", "give me", "show me", "main.dart", "example code", "generate code for", "codesnippet".

Workflow:

Step 1 — Detect the Platform and Suggest the Correct Package

• Inspect the workspace project files (pubspec.yaml, main.dart, etc.) to identify the Flutter platform target (mobile, web, desktop).
• Tell the user to add syncfusion_flutter_pdf to their pubspec.yaml before generating any code.

Step 2 — Generate Code from Reference Files Only

Do NOT invent, guess, or suggest any API, class, method, or property not explicitly present in the reference files.

• Read the relevant references/*.md file(s) for the requested feature
• Build Dart code strictly from the APIs and snippets found in those files
• Use the correct save/launch pattern for the target platform:
  • Mobile → getApplicationSupportDirectory() + OpenFile.open()
  • Desktop → getApplicationSupportDirectory() + OpenFile.open()
  • Web → base64 + JavaScript download or web package approach
• Do not create or run any standalone Dart script

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Code References

All snippets are in the references/ folder:

File	Contents
document-structure.md	Create/load document, page settings, orientation, margins, sections, save to file/stream, incremental update, compression, open encrypted PDF, dispose
pages.md	Add/insert/remove/rotate pages, get page count, set margins, sections with different page settings, get client size
flow-layout.md	Chain elements using PdfLayoutResult, paginate text across pages, PdfLayoutFormat options
text.md	Draw text (drawString, PdfTextElement), standard/TrueType/CJK fonts, RTL text, multicolumn text, pens and brushes
images.md	Insert JPEG/PNG images (PdfBitmap), apply transparency and rotation, insert from web URL
shapes.md	Draw polygon, line, curve, path, rectangle, pie, arc, bezier, ellipse
tables.md	Create PdfGrid, add columns/headers/rows, cell/row/column customization, built-in styles, pagination, multiple tables
lists.md	Ordered lists (PdfOrderedList), unordered lists (PdfUnorderedList), sub-lists
header-footer.md	Add headers and footers (PdfPageTemplateElement), automatic fields (page number, page count, date/time), composite fields
bookmarks.md	Add/insert/remove/modify bookmarks (PdfBookmark), child bookmarks, destination, color, text style
annotations.md	Rectangle, ellipse, line, polygon, URI, document link, text web link, text markup, popup annotations; flatten, modify, remove annotations; import/export FDF/XFDF/JSON
hyperlinks.md	Web navigation links (PdfTextWebLink), URI annotations, internal document navigation (PdfDocumentLinkAnnotation), destination modes
watermarks.md	Text and image watermarks with transparency and rotation, apply to all pages via PdfPageTemplateElement stamp
pdf-templates.md	Create PdfTemplate, draw templates on pages, extract page as template using createTemplate, stamp overlays with PdfPageTemplateElement
digital-signature.md	PdfSignatureField, PdfCertificate, sign new/existing PDF, signature appearance, external signer, multiple signatures, timestamp, LTV
text-extraction.md	Extract text (full/page/range), extract text lines/words/characters with bounds and font info, find text with MatchedItem
pdf-conformance.md	PDF/A-1b, PDF/A-2b, PDF/A-3b conformance levels, embedded fonts requirement, attachment relationships for PDF/A-3b
attachments.md	Add/remove file attachments (PdfAttachment), attach from base64, extract and save to disk, PDF/A-3b attachment metadata
layers.md	Add/toggle/remove layers (PdfPageLayer), nested layers (PdfLayer), visibility control, flatten layers
forms.md	AcroForm fields: text box, combo box, radio button, list box, check box, signature, button; fill/modify/flatten/remove fields; import/export FDF/XFDF/JSON/XML
encryption.md	RC4 and AES encryption, user/owner passwords, permissions (print, copy, edit), protect existing PDF, change/remove password

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Rules

• Output files go in ./output/ directory
• Temp .dart scripts must be created inside {skill-root}/flutter/pdf/scripts/ — never in the workspace root or customer scripts/ folder
• Never leave temp .dart files after execution
• Always call document.dispose() after saving
• All units in PDF are in points (not pixels)
• Use PdfLayoutResult to chain elements and avoid content overlap

Prerequisites

• Flutter SDK installed
• Add to pubspec.yaml:

  dependencies:
    syncfusion_flutter_pdf: ^xx.x.xx
  

• Run: flutter pub get
• Import in Dart code:

  import 'package:syncfusion_flutter_pdf/pdf.dart';