pdf viewer - Search Arabic words

[AbanoubFakheryMakram]

Bug description

When searching for a word in Arabic pdf file no results found, while copying this word from the file and past it inside searchController the controller find it

_searchResult = _pdfViewerController.searchText("ﻛﯿﻒ");

Steps to reproduce

1. Use this file as ref "https://www.ed.gov/sites/ed/files/about/offices/list/ocr/docs/qa-201405-arabic.pdf"

2. Try to give the controller a direct word "simulate a user search" => pdfViewerController.searchText("ﻛﯿﻒ");
   Expected: The controller could find the word
   Actual: The controller can not find this word

3. Try copy any word from the file and past as it inside the controller
   Here the controller can find the word

Code sample

Code sample

import 'dart:convert';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late PdfViewerController _pdfViewerController;
  late PdfTextSearchResult _searchResult;

  @override
  void initState() {
    _pdfViewerController = PdfViewerController();
    _searchResult = PdfTextSearchResult();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
        actions: <Widget>[
          IconButton(
            icon: const Icon(
              Icons.search,
              color: Colors.white,
            ),
            onPressed: () {
              _searchResult = _pdfViewerController.searchText("ﻛﯿﻒ");
              if (kIsWeb) {
                print('Total instance count: ${_searchResult.totalInstanceCount}');
              } else {
                _searchResult.addListener(
                  () {
                    if (_searchResult.hasResult && _searchResult.isSearchCompleted) {
                      print('Total instance count: ${_searchResult.totalInstanceCount}');
                    } else {
                      print('no search result');
                    }
                  },
                );
              }
            },
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _searchResult.nextInstance();
        },
        child: const Icon(Icons.next_plan_outlined),
      ),
      body: SfPdfViewer.network(
        'https://www.ed.gov/sites/ed/files/about/offices/list/ocr/docs/qa-201405-arabic.pdf',
        controller: _pdfViewerController,
        currentSearchTextHighlightColor: Colors.blue.withOpacity(.4),
        otherSearchTextHighlightColor: Colors.yellow.withOpacity(.4),
      ),
    );
  }
}

Screenshots or Video

Screenshots / Video demonstration

Stack Traces

Stack Traces

No strack trace availabe

On which target platforms have you observed this bug?

Android, iOS

Flutter Doctor output

Doctor output

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.24.2, on macOS 14.0 23A344 darwin-arm64, locale
    en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 15.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.1)
[✓] Connected device (4 available)
    ! Error: Browsing on the local area network for iPhone. Ensure the device is unlocked and attached with a
      cable or associated with the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)
[✓] Network resources

• No issues found!

[ismailelmogy]

I am also experiencing this issue with searching Arabic text in syncfusion_flutter_pdfviewer. When I use the searchText feature for Arabic words, it fails to find the correct results or sometimes does not locate the text at all.

My Setup:

• Flutter Version: 3.22.2
• Syncfusion Version: ^27.1.58

Steps to Reproduce:

1. Load a PDF with Arabic content.
2. Attempt to search for an Arabic word or phrase using the searchText function.
3. Observe that the function does not return the expected results.

I’d appreciate any updates on resolving this issue. Thank you!