PDF Viewer

1. Requirements Document

Overview

A high-performance PDF renderer that can handle large documents with features like search, page navigation, and link support.

User Stories

  • As a User, I want to open large PDF reports without the app freezing.
  • As a User, I want to search for specific text within the document.

Functional Requirements

  1. Rendering: Vector-based rendering (sharp at any zoom level).
  2. Navigation: Jump to page, Bookmarks, Thumbnails.
  3. Search: Highlight text matches.
  4. Source: Network (download & cache), Asset, File.

2. Technical Document

Architecture

System Architecture

The PDF Document engine manages the connection to the native renderer (PDFium on Android, PDFKit on iOS). It employs Lazy Loading strategies to only render the pages currently visible in the viewport to save memory.

API Design

Usage

PdfViewer(
  source: "https://example.com/report.pdf",
  enableSearch: true,
  onPageChanged: (page) => print("Page $page"),
)