native_pdf_engine 0.0.1 
native_pdf_engine: ^0.0.1 copied to clipboard
Published 3 days ago • 
alihassan143cool.blogspot.com
alihassan143cool.blogspot.comA high-performance, FFI-based Flutter package to convert HTML and URLs to PDF using native OS webviews (Android, iOS, macOS).
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:native_pdf_engine/native_pdf_engine.dart';
import 'package:native_pdf_engine_example/viewer.dart';
import 'package:path_provider/path_provider.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String? _pdfPath;
String _statusMessage = 'Keep calm and generate PDF';
bool _isGenerating = false;
final TextEditingController _htmlController = TextEditingController(
text: '''
<!DOCTYPE html>
<html>
<head>
<style>
body { font-family: sans-serif; padding: 20px; }
h1 { color: #333; }
p { color: #666; }
.box {
background-color: #f0f0f0;
padding: 15px;
border-radius: 8px;
margin-top: 20px;
}
</style>
</head>
<body>
<h1>Native PDF Engine</h1>
<p>This PDF was generated from HTML using native platform webviews.</p>
<div class="box">
<p><strong>Platform:</strong> Native Render</p>
<p>Success! The engine is working correctly.</p>
</div>
</body>
</html>
''',
);
final TextEditingController _urlController = TextEditingController(
text: 'https://flutter.dev',
);
int _selectedTabIndex = 0;
@override
void dispose() {
_htmlController.dispose();
_urlController.dispose();
super.dispose();
}
Future<void> _generatePdf() async {
setState(() {
_isGenerating = true;
_statusMessage = 'Generating PDF...';
_pdfPath = null;
});
try {
final dir = await getTemporaryDirectory();
final targetPath = '${dir.path}/example.pdf';
if (_selectedTabIndex == 0) {
// HTML Mode
await NativePdf.convert(_htmlController.text, targetPath);
} else {
// URL Mode
await NativePdf.convertUrl(_urlController.text, targetPath);
}
if (mounted) {
setState(() {
_statusMessage = 'PDF Generated Successfully at:\n$targetPath';
_pdfPath = targetPath;
});
}
} catch (e) {
if (mounted) {
setState(() {
_statusMessage = 'Error generating PDF:\n$e';
});
}
} finally {
if (mounted) {
setState(() {
_isGenerating = false;
});
}
}
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text('Native PDF Engine Example')),
body: Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
// Tab Selector
Row(
children: [
Expanded(
child: SegmentedButton<int>(
segments: const [
ButtonSegment(
value: 0,
label: Text('HTML'),
icon: Icon(Icons.code),
),
ButtonSegment(
value: 1,
label: Text('URL'),
icon: Icon(Icons.link),
),
],
selected: {_selectedTabIndex},
onSelectionChanged: (Set<int> newSelection) {
setState(() {
_selectedTabIndex = newSelection.first;
});
},
),
),
],
),
const SizedBox(height: 16),
// Input Area
SizedBox(
height: 150,
child: _selectedTabIndex == 0
? TextField(
controller: _htmlController,
maxLines: null,
expands: true,
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'HTML Content',
alignLabelWithHint: true,
),
textAlignVertical: TextAlignVertical.top,
)
: TextField(
controller: _urlController,
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'URL (e.g., https://example.com)',
),
),
),
const SizedBox(height: 16),
Text(
_statusMessage,
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14),
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
const SizedBox(height: 10),
if (_isGenerating)
const CircularProgressIndicator()
else
ElevatedButton(
onPressed: _generatePdf,
child: const Text('Generate PDF'),
),
],
),
),
Expanded(
child: _pdfPath != null
? MainPage(file: File(_pdfPath!))
: Center(
child: Text(
'No PDF generated yet',
style: TextStyle(color: Colors.grey.shade400),
),
),
),
],
),
),
);
}
}Metadata
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Metadata
A high-performance, FFI-based Flutter package to convert HTML and URLs to PDF using native OS webviews (Android, iOS, macOS).
Repository (GitHub)
View/report issues
Topics
#pdf #html-to-pdf #webview #ffi #jni
Documentation
License
MIT (license)
Dependencies
ffi, flutter, jni, logging, objective_c, path
More
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