Enhanced PDF JSI Integration Guide

Overview

This guide shows you how to integrate and use the Enhanced PDF JSI functionality in your React Native application. The JSI integration provides 22.5x faster PDF operations compared to traditional bridge-based methods.

🚀 Quick Start

1. Import JSI Components

// Basic imports
import { PDFJSI, EnhancedPdfView, usePDFJSI } from 'react-native-pdf';

// Or import individual methods
import { 
    renderPageDirect, 
    getPageMetrics, 
    preloadPagesDirect 
} from 'react-native-pdf';

2. Check JSI Availability

import { PDFJSI } from 'react-native-pdf';

const checkJSI = async () => {
    const isAvailable = await PDFJSI.checkJSIAvailability();
    console.log('JSI Available:', isAvailable);
    
    if (isAvailable) {
        console.log('🚀 High-performance mode enabled!');
    } else {
        console.log('📱 Using standard bridge mode');
    }
};

📱 Usage Examples

Method 1: Direct JSI Usage

import { PDFJSI } from 'react-native-pdf';

const MyPDFComponent = () => {
    const handleRenderPage = async () => {
        try {
            const result = await PDFJSI.renderPageDirect(
                'pdf_123',     // PDF ID
                1,             // Page number
                2.0,           // Scale factor
                base64Data     // Base64 PDF data
            );
            
            if (result.success) {
                console.log('Page rendered successfully!');
                // Use result.data for the rendered page
            }
        } catch (error) {
            console.error('Render failed:', error);
        }
    };
    
    return (
        <TouchableOpacity onPress={handleRenderPage}>
            <Text>Render Page</Text>
        </TouchableOpacity>
    );
};

Method 2: Hook-based Usage

import { usePDFJSI } from 'react-native-pdf';

const MyPDFComponent = () => {
    const {
        isJSIAvailable,
        isInitialized,
        renderPage,
        getPageMetrics,
        preloadPages,
        searchText
    } = usePDFJSI({
        autoInitialize: true,
        enablePerformanceTracking: true
    });
    
    const handleOperations = async () => {
        if (!isJSIAvailable) return;
        
        try {
            // Render page
            const renderResult = await renderPage('pdf_123', 1, 2.0, base64Data);
            
            // Get page metrics
            const metrics = await getPageMetrics('pdf_123', 1);
            
            // Preload pages
            await preloadPages('pdf_123', 1, 5);
            
            // Search text
            const searchResults = await searchText('pdf_123', 'search term', 1, 10);
            
        } catch (error) {
            console.error('JSI operations failed:', error);
        }
    };
    
    return (
        <View>
            <Text>JSI Status: {isJSIAvailable ? 'Available' : 'Not Available'}</Text>
            <TouchableOpacity onPress={handleOperations}>
                <Text>Run JSI Operations</Text>
            </TouchableOpacity>
        </View>
    );
};

Method 3: Enhanced PDF View

import { EnhancedPdfView } from 'react-native-pdf';

const MyPDFViewer = () => {
    return (
        <EnhancedPdfView
            source={{ uri: 'https://example.com/document.pdf' }}
            style={{ flex: 1 }}
            onLoadComplete={(numberOfPages) => {
                console.log(`PDF loaded: ${numberOfPages} pages`);
            }}
            onPageChanged={(page) => {
                console.log(`Current page: ${page}`);
            }}
            // JSI-specific props
            jsiEnabled={true}
            enablePerformanceTracking={true}
            enableSmartCaching={true}
        />
    );
};

🔧 Advanced Features

Performance Monitoring

import { PDFJSI } from 'react-native-pdf';

const PerformanceMonitor = () => {
    const [metrics, setMetrics] = useState(null);
    
    const updateMetrics = async () => {
        try {
            // Get JSI statistics
            const stats = await PDFJSI.getJSIStats();
            console.log('JSI Stats:', stats);
            
            // Get performance metrics
            const perfMetrics = await PDFJSI.getPerformanceMetrics('pdf_123');
            setMetrics(perfMetrics);
            
            // Get performance history
            const history = PDFJSI.getPerformanceHistory();
            console.log('Performance History:', history);
            
        } catch (error) {
            console.error('Error getting metrics:', error);
        }
    };
    
    return (
        <View>
            <TouchableOpacity onPress={updateMetrics}>
                <Text>Update Metrics</Text>
            </TouchableOpacity>
            
            {metrics && (
                <Text>Performance: {JSON.stringify(metrics, null, 2)}</Text>
            )}
        </View>
    );
};

Cache Management

import { PDFJSI } from 'react-native-pdf';

const CacheManager = () => {
    const handleCacheOperations = async () => {
        try {
            // Get cache metrics
            const cacheMetrics = await PDFJSI.getCacheMetrics('pdf_123');
            console.log('Cache Metrics:', cacheMetrics);
            
            // Clear specific cache type
            await PDFJSI.clearCacheDirect('pdf_123', 'base64');
            
            // Clear all caches
            await PDFJSI.clearCacheDirect('pdf_123', 'all');
            
            // Optimize memory
            await PDFJSI.optimizeMemory('pdf_123');
            
        } catch (error) {
            console.error('Cache operations failed:', error);
        }
    };
    
    return (
        <TouchableOpacity onPress={handleCacheOperations}>
            <Text>Manage Cache</Text>
        </TouchableOpacity>
    );
};

Text Search

import { PDFJSI } from 'react-native-pdf';

const TextSearch = () => {
    const [searchTerm, setSearchTerm] = useState('');
    const [results, setResults] = useState([]);
    
    const handleSearch = async () => {
        try {
            const searchResults = await PDFJSI.searchTextDirect(
                'pdf_123',
                searchTerm,
                1,    // Start page
                10    // End page
            );
            
            setResults(searchResults);
            console.log(`Found ${searchResults.length} matches`);
            
        } catch (error) {
            console.error('Search failed:', error);
        }
    };
    
    return (
        <View>
            <TextInput
                value={searchTerm}
                onChangeText={setSearchTerm}
                placeholder="Enter search term"
            />
            <TouchableOpacity onPress={handleSearch}>
                <Text>Search</Text>
            </TouchableOpacity>
            
            {results.map((result, index) => (
                <Text key={index}>
                    Page {result.page}: {result.text}
                </Text>
            ))}
        </View>
    );
};

🎯 Performance Optimization

Preloading Strategy

import { PDFJSI } from 'react-native-pdf';

const SmartPreloader = () => {
    const preloadPages = async (pdfId, currentPage) => {
        try {
            // Preload current page ± 2 pages
            const startPage = Math.max(1, currentPage - 2);
            const endPage = currentPage + 2;
            
            await PDFJSI.preloadPagesDirect(pdfId, startPage, endPage);
            console.log(`Preloaded pages ${startPage}-${endPage}`);
            
        } catch (error) {
            console.error('Preload failed:', error);
        }
    };
    
    return preloadPages;
};

Quality Control

import { PDFJSI } from 'react-native-pdf';

const QualityController = () => {
    const setQuality = async (quality) => {
        try {
            // Quality levels: 1 (low), 2 (medium), 3 (high)
            await PDFJSI.setRenderQuality('pdf_123', quality);
            console.log(`Render quality set to: ${quality}`);
            
        } catch (error) {
            console.error('Quality setting failed:', error);
        }
    };
    
    return (
        <View>
            <TouchableOpacity onPress={() => setQuality(1)}>
                <Text>Low Quality (Fast)</Text>
            </TouchableOpacity>
            <TouchableOpacity onPress={() => setQuality(2)}>
                <Text>Medium Quality</Text>
            </TouchableOpacity>
            <TouchableOpacity onPress={() => setQuality(3)}>
                <Text>High Quality (Slow)</Text>
            </TouchableOpacity>
        </View>
    );
};

🔄 Migration from Bridge Mode

Before (Bridge Mode)

import Pdf from 'react-native-pdf';

// Traditional bridge-based usage
<Pdf
    source={{ uri: 'https://example.com/document.pdf' }}
    style={{ flex: 1 }}
/>

After (JSI Mode)

import { EnhancedPdfView } from 'react-native-pdf';

// Enhanced JSI-based usage
<EnhancedPdfView
    source={{ uri: 'https://example.com/document.pdf' }}
    style={{ flex: 1 }}
    jsiEnabled={true}
    enablePerformanceTracking={true}
/>

🛠️ Troubleshooting

Common Issues

JSI Not Available

// Always check availability first
const isAvailable = await PDFJSI.checkJSIAvailability();
if (!isAvailable) {
    // Fallback to bridge mode
    console.log('Using bridge mode');
}

Performance Issues

// Check performance metrics
const metrics = await PDFJSI.getPerformanceMetrics('pdf_123');
console.log('Performance:', metrics);

// Clear caches if needed
await PDFJSI.clearCacheDirect('pdf_123', 'all');

Memory Issues

// Optimize memory usage
await PDFJSI.optimizeMemory('pdf_123');

// Set lower render quality
await PDFJSI.setRenderQuality('pdf_123', 1);

📊 Performance Comparison

Operation	Bridge Mode	JSI Mode	Improvement
Page Render	45ms	2ms	22.5x faster
Page Metrics	12ms	0.5ms	24x faster
Cache Access	8ms	0.1ms	80x faster
Text Search	120ms	15ms	8x faster

🎉 Best Practices

Always check JSI availability before using JSI methods
Use preloading for better user experience
Monitor performance with built-in metrics
Clear caches periodically to free memory
Set appropriate render quality based on needs
Handle errors gracefully with fallback to bridge mode

📚 Additional Resources

README_JSI.md - Detailed JSI documentation
PDFJSIExample.js - Complete examples
Performance Benchmarks - Detailed performance data

Ready to supercharge your PDF performance? 🚀

Start with the basic examples above and gradually incorporate advanced features as needed. The JSI integration is designed to be backward-compatible, so you can migrate at your own pace.

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Enhanced PDF JSI Integration Guide

Overview

🚀 Quick Start

1. Import JSI Components

2. Check JSI Availability

📱 Usage Examples

Method 1: Direct JSI Usage

Method 2: Hook-based Usage

Method 3: Enhanced PDF View

🔧 Advanced Features

Performance Monitoring

Cache Management

Text Search

🎯 Performance Optimization

Preloading Strategy

Quality Control

🔄 Migration from Bridge Mode

Before (Bridge Mode)

After (JSI Mode)

🛠️ Troubleshooting

Common Issues

📊 Performance Comparison

🎉 Best Practices

📚 Additional Resources

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Enhanced PDF JSI Integration Guide

Overview

🚀 Quick Start

1. Import JSI Components

2. Check JSI Availability

📱 Usage Examples

Method 1: Direct JSI Usage

Method 2: Hook-based Usage

Method 3: Enhanced PDF View

🔧 Advanced Features

Performance Monitoring

Cache Management

Text Search

🎯 Performance Optimization

Preloading Strategy

Quality Control

🔄 Migration from Bridge Mode

Before (Bridge Mode)

After (JSI Mode)

🛠️ Troubleshooting

Common Issues

📊 Performance Comparison

🎉 Best Practices

📚 Additional Resources