RTL and Script Unicode Font (ttf), and ligatures not supported

[sh0umik]

Describe the bug Bangla Unicode Fonts gets Broken after generation of the PDF. The Unicode font works well in web. But its got broken when

I made a repository to demonstrate the problem. ( font included ). I have tried with 12 different Bangla Unicode font. Same result for all. Just run the program and you will see that the String in Text widget didnt get rendered properly.

https://github.com/sh0umik/flutter_pdf_test.git

Expected behaviour Expected behaviour is exactly like the test in Text widget

Screenshots Got this (broken)

Expected this

Flutter Doctor Paste the output of running flutter doctor -v here.

[✓] Flutter (Channel beta, v1.12.13+hotfix.6, on Mac OS X 10.14.6 18G103, locale en-BD)
    • Flutter version 1.12.13+hotfix.6 at /Users/diablo/flutter
    • Framework revision 18cd7a3601 (3 weeks ago), 2019-12-11 06:35:39 -0800
    • Engine revision 2994f7e1e6
    • Dart version 2.7.0

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/diablo/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /Users/diablo/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/191.6010548/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.1, Build version 11A1027
    • CocoaPods version 1.8.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 3.5)
    • Android Studio at /Users/diablo/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/191.6010548/Android Studio.app/Contents
    • Flutter plugin version 42.1.1
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[!] IntelliJ IDEA Ultimate Edition (version 2019.3)
    • IntelliJ at /Users/diablo/Applications/JetBrains Toolbox/IntelliJ IDEA Ultimate.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
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    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.41.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.7.1

[✓] Connected device (3 available)
    • ONEPLUS A6010 • 192.168.0.100:5555 • android-arm64  • Android 10 (API 29)
    • Chrome        • chrome             • web-javascript • Google Chrome 79.0.3945.88
    • Web Server    • web-server         • web-javascript • Flutter Tools

Desktop (please complete the following information):

• [*] iOS
• [*] Android
• [*] Browser

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. all browser, sa]
• Version [e.g. 22]

Additional context Many thing on my flutter web app depends on this plugin. Need to find a solution ASAP. Also i am converting the pdf.save() into a Uint8List so that it could be sent through firebase. Could this be a problem ? List to Uint8List conversation ?

[pluzmedia]

Flutter should have to work on this, It's really a big road block.

[Mohamedfaroouk]

@DavBfr I manged to fix the arabic words problem by editing this file pdf/src/pdf/arabic.dart just copy this code to the file and make the textDirection to rtl

/*
 * Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/// Arabic shape substitutions: char code => (isolated, final, initial, medial).
/// Arabic Substition A
const Map<int, dynamic> _arabicSubstitionA = <int, dynamic>{
  0x0640: <int>[0x0640, 0x0640, 0x0640, 0x0640], // ARABIC TATWEEL

  0x0621: <int>[1569], // ARABIC LETTER HAMZA
  0x0622: <int>[1570, 0xFE82], // ARABIC LETTER ALEF WITH MADDA ABOVE
  0x0623: <int>[1571, 0xFE84], // ARABIC LETTER ALEF WITH HAMZA ABOVE
  0x0624: <int>[1572, 0xFE86], // ARABIC LETTER WAW WITH HAMZA ABOVE
  0x0625: <int>[1573, 0xFE88], // ARABIC LETTER ALEF WITH HAMZA BELOW
  0x0626: <int>[
    1574,
    0xFE8A,
    0xFE8B,
    0xFE8C
  ], // ARABIC LETTER YEH WITH HAMZA ABOVE
  0x0627: <int>[1575, 0xFE8E], // ARABIC LETTER ALEF
  0x0628: <int>[1576, 0xFE90, 0xFE91, 0xFE92], // ARABIC LETTER BEH
  0x0629: <int>[1577, 0xFE94], // ARABIC LETTER TEH MARBUTA
  0x062A: <int>[1578, 0xFE96, 0xFE97, 0xFE98], // ARABIC LETTER TEH
  0x062B: <int>[1579, 0xFE9A, 0xFE9B, 0xFE9C], // ARABIC LETTER THEH
  0x062C: <int>[1580, 0xFE9E, 0xFE9F, 0xFEA0], // ARABIC LETTER JEEM
  0x062D: <int>[1581, 0xFEA2, 0xFEA3, 0xFEA4], // ARABIC LETTER HAH
  0x062E: <int>[1582, 0xFEA6, 0xFEA7, 0xFEA8], // ARABIC LETTER KHAH
  0x062F: <int>[1583, 0xFEAA], // ARABIC LETTER DAL
  0x0630: <int>[1584, 0xFEAC], // ARABIC LETTER THAL
  0x0631: <int>[1585, 0xFEAE], // ARABIC LETTER REH
  0x0632: <int>[1586, 0xFEB0], // ARABIC LETTER ZAIN
  0x0633: <int>[1587, 0xFEB2, 0xFEB3, 0xFEB4], // ARABIC LETTER SEEN
  0x0634: <int>[1588, 0xFEB6, 0xFEB7, 0xFEB8], // ARABIC LETTER SHEEN
  0x0635: <int>[1589, 0xFEBA, 0xFEBB, 0xFEBC], // ARABIC LETTER SAD
  0x0636: <int>[1590, 0xFEBE, 0xFEBF, 0xFEC0], // ARABIC LETTER DAD
  0x0637: <int>[1591, 0xFEC2, 0xFEC3, 0xFEC4], // ARABIC LETTER TAH
  0x0638: <int>[1592, 0xFEC6, 0xFEC7, 0xFEC8], // ARABIC LETTER ZAH
  0x0639: <int>[1593, 0xFECA, 0xFECB, 0xFECC], // ARABIC LETTER AIN
  0x063A: <int>[1594, 0xFECE, 0xFECF, 0xFED0], // ARABIC LETTER GHAIN
  0x0641: <int>[1601, 0xFED2, 0xFED3, 0xFED4], // ARABIC LETTER FEH
  0x0642: <int>[1602, 0xFED6, 0xFED7, 0xFED8], // ARABIC LETTER QAF
  0x0643: <int>[1603, 0xFEDA, 0xFEDB, 0xFEDC], // ARABIC LETTER KAF
  0x0644: <int>[1604, 0xFEDE, 0xFEDF, 0xFEE0], // ARABIC LETTER LAM
  0x0645: <int>[1605, 0xFEE2, 0xFEE3, 0xFEE4], // ARABIC LETTER MEEM
  0x0646: <int>[1606, 0xFEE6, 0xFEE7, 0xFEE8], // ARABIC LETTER NOON
  0x0647: <int>[1607, 0xFEEA, 0xFEEB, 0xFEEC], // ARABIC LETTER HEH
  0x0648: <int>[1608, 0xFEEE], // ARABIC LETTER WAW
  0x0649: <int>[1609, 0xFEF0, 64488, 64489], // ARABIC LETTER ALEF MAKSURA
  0x064A: <int>[1610, 0xFEF2, 0xFEF3, 0xFEF4], // ARABIC LETTER YEH
  0x0671: <int>[0xFB50, 0xFB51], // ARABIC LETTER ALEF WASLA
  0x0677: <int>[0xFBDD], // ARABIC LETTER U WITH HAMZA ABOVE
  0x0679: <int>[0xFB66, 0xFB67, 0xFB68, 0xFB69], // ARABIC LETTER TTEH
  0x067A: <int>[0xFB5E, 0xFB5F, 0xFB60, 0xFB61], // ARABIC LETTER TTEHEH
  0x067B: <int>[0xFB52, 0xFB53, 0xFB54, 0xFB55], // ARABIC LETTER BEEH
  0x067E: <int>[0xFB56, 0xFB57, 0xFB58, 0xFB59], // ARABIC LETTER PEH
  0x067F: <int>[0xFB62, 0xFB63, 0xFB64, 0xFB65], // ARABIC LETTER TEHEH
  0x0680: <int>[0xFB5A, 0xFB5B, 0xFB5C, 0xFB5D], // ARABIC LETTER BEHEH
  0x0683: <int>[0xFB76, 0xFB77, 0xFB78, 0xFB79], // ARABIC LETTER NYEH
  0x0684: <int>[0xFB72, 0xFB73, 0xFB74, 0xFB75], // ARABIC LETTER DYEH
  0x0686: <int>[0xFB7A, 0xFB7B, 0xFB7C, 0xFB7D], // ARABIC LETTER TCHEH
  0x0687: <int>[0xFB7E, 0xFB7F, 0xFB80, 0xFB81], // ARABIC LETTER TCHEHEH
  0x0688: <int>[0xFB88, 0xFB89], // ARABIC LETTER DDAL
  0x068C: <int>[0xFB84, 0xFB85], // ARABIC LETTER DAHAL
  0x068D: <int>[0xFB82, 0xFB83], // ARABIC LETTER DDAHAL
  0x068E: <int>[0xFB86, 0xFB87], // ARABIC LETTER DUL
  0x0691: <int>[0xFB8C, 0xFB8D], // ARABIC LETTER RREH
  0x0698: <int>[0xFB8A, 0xFB8B], // ARABIC LETTER JEH
  0x06A4: <int>[0xFB6A, 0xFB6B, 0xFB6C, 0xFB6D], // ARABIC LETTER VEH
  0x06A6: <int>[0xFB6E, 0xFB6F, 0xFB70, 0xFB71], // ARABIC LETTER PEHEH
  0x06A9: <int>[0xFB8E, 0xFB8F, 0xFB90, 0xFB91], // ARABIC LETTER KEHEH
  0x06AD: <int>[0xFBD3, 0xFBD4, 0xFBD5, 0xFBD6], // ARABIC LETTER NG
  0x06AF: <int>[0xFB92, 0xFB93, 0xFB94, 0xFB95], // ARABIC LETTER GAF
  0x06B1: <int>[0xFB9A, 0xFB9B, 0xFB9C, 0xFB9D], // ARABIC LETTER NGOEH
  0x06B3: <int>[0xFB96, 0xFB97, 0xFB98, 0xFB99], // ARABIC LETTER GUEH
  0x06BA: <int>[0xFB9E, 0xFB9F], // ARABIC LETTER NOON GHUNNA
  0x06BB: <int>[0xFBA0, 0xFBA1, 0xFBA2, 0xFBA3], // ARABIC LETTER RNOON
  0x06BE: <int>[
    0xFBAA,
    0xFBAB,
    0xFBAC,
    0xFBAD
  ], // ARABIC LETTER HEH DOACHASHMEE
  0x06C0: <int>[0xFBA4, 0xFBA5], // ARABIC LETTER HEH WITH YEH ABOVE
  0x06C1: <int>[0xFBA6, 0xFBA7, 0xFBA8, 0xFBA9], // ARABIC LETTER HEH GOAL
  0x06C5: <int>[0xFBE0, 0xFBE1], // ARABIC LETTER KIRGHIZ OE
  0x06C6: <int>[0xFBD9, 0xFBDA], // ARABIC LETTER OE
  0x06C7: <int>[0xFBD7, 0xFBD8], // ARABIC LETTER U
  0x06C8: <int>[0xFBDB, 0xFBDC], // ARABIC LETTER YU
  0x06C9: <int>[0xFBE2, 0xFBE3], // ARABIC LETTER KIRGHIZ YU
  0x06CB: <int>[0xFBDE, 0xFBDF], // ARABIC LETTER VE
  0x06CC: <int>[0xFBFC, 0xFBFD, 0xFBFE, 0xFBFF], // ARABIC LETTER FARSI YEH
  0x06D0: <int>[0xFBE4, 0xFBE5, 0xFBE6, 0xFBE7], //ARABIC LETTER E
  0x06D2: <int>[0xFBAE, 0xFBAF], // ARABIC LETTER YEH BARREE
  0x06D3: <int>[0xFBB0, 0xFBB1], // ARABIC LETTER YEH BARREE WITH HAMZA ABOVE
};

/*
    var ligaturesSubstitutionA = {
        0xFBEA: []// ARABIC LIGATURE YEH WITH HAMZA ABOVE WITH ALEF ISOLATED FORM
    };
    */

const Map<int, dynamic> _diacriticLigatures = <int, dynamic>{
  0x0651: <int, int>{
    0x064C: 0xFC5E, // Shadda + Dammatan
    0x064D: 0xFC5F, // Shadda + Kasratan
    0x064E: 0xFC60, // Shadda + Fatha
    0x064F: 0xFC61, // Shadda + Damma
    0x0650: 0xFC62, // Shadda + Kasra
    0x0670: 0xFC63, // Shadda + Dagger alif
  },
};

const Map<int, dynamic> _ligatures = <int, dynamic>{
  0xFEDF: <int, int>{
    0xFE82:
        0xFEF5, // ARABIC LIGATURE LAM WITH ALEF WITH MADDA ABOVE ISOLATED FORM
    0xFE84:
        0xFEF7, // ARABIC LIGATURE LAM WITH ALEF WITH HAMZA ABOVE ISOLATED FORM
    0xFE88:
        0xFEF9, // ARABIC LIGATURE LAM WITH ALEF WITH HAMZA BELOW ISOLATED FORM
    0xFE8E: 0xFEFB // ARABIC LIGATURE LAM WITH ALEF ISOLATED FORM
  },
  0xFEE0: <int, int>{
    0xFE82: 0xFEF6, // ARABIC LIGATURE LAM WITH ALEF WITH MADDA ABOVE FINAL FORM
    0xFE84: 0xFEF8, // ARABIC LIGATURE LAM WITH ALEF WITH HAMZA ABOVE FINAL FORM
    0xFE88: 0xFEFA, // ARABIC LIGATURE LAM WITH ALEF WITH HAMZA BELOW FINAL FORM
    0xFE8E: 0xFEFC // ARABIC LIGATURE LAM WITH ALEF FINAL FORM
  },
  0xFE8D: <int, dynamic>{
    0xFEDF: <int, dynamic>{
      0xFEE0: <int, int>{0xFEEA: 0xFDF2}
    }
  }, // ALLAH
};

const List<int> _alfletter = <int>[1570, 1571, 1573, 1575];

const Map<int, int> _arabicDiacritics = <int, int>{
  0x064B: 0x064B, // Fathatan
  0x064C: 0x064C, // Dammatan
  0x064D: 0x064D, // Kasratan
  0x064E: 0x064E, // Fatha
  0x064F: 0x064F, // Damma
  0x0650: 0x0650, // Kasra
  0x0651: 0x0651, // Shadda
  0x0652: 0x0652, // Sukun

  0x0670: 0x0670, // Dagger alif

  0xFC5E: 0xFC5E, // Shadda + Dammatan
  0xFC5F: 0xFC5F, // Shadda + Kasratan
  0xFC60: 0xFC60, // Shadda + Fatha
  0xFC61: 0xFC61, // Shadda + Damma
  0xFC62: 0xFC62, // Shadda + Kasra
  0xFC63: 0xFC63, // Shadda + Dagger alif
  // 1548: 1548,
};

const int _noChangeInForm = -1;
const int _isolatedForm = 0;
const int _finalForm = 1;
const int _initialForm = 2;
const int _medialForm = 3;

bool _isInArabicSubstitutionA(int letter) {
  return _arabicSubstitionA.containsKey(letter);
}

bool _isArabicLetter(int letter) {
  return (letter >= 0x0600 && letter <= 0x06FF) ||
      (letter >= 0x0750 && letter <= 0x077F) ||
      (letter >= 0x08FF && letter <= 0xFB50) ||
      (letter >= 0xFDFF && letter <= 0xFEFF);
}

bool _isArabicEndLetter(int letter) {
  return _isArabicLetter(letter) &&
      _isInArabicSubstitutionA(letter) &&
      _arabicSubstitionA[letter].length <= 2;
}

bool _isArabicAlfLetter(int letter) {
  return _isArabicLetter(letter) && _alfletter.contains(letter);
}

bool _arabicLetterHasFinalForm(int letter) {
  return _isArabicLetter(letter) &&
      _isInArabicSubstitutionA(letter) &&
      (_arabicSubstitionA[letter].length >= 2);
}

bool _arabicLetterHasMedialForm(int letter) {
  return _isArabicLetter(letter) &&
      _isInArabicSubstitutionA(letter) &&
      _arabicSubstitionA[letter].length == 4;
}

bool _isArabicDiacritic(int letter) {
  return _arabicDiacritics.containsKey(letter);
}

bool isArabicDiacriticValue(int letter) {
  return _arabicDiacritics.containsValue(letter);
}

List<int> _resolveLigatures(List<int> lettersq) {
  final result = <int>[];
  dynamic tmpLigatures = _ligatures;
  dynamic tmpDiacritic = _diacriticLigatures;
  final letters = lettersq.reversed.toList();

  final effectedLetters = <int>[];
  final effectedDiacritics = <int>[];

  final finalDiacritics = <int>[];

  for (var i = 0; i < letters.length; i++) {
    if (isArabicDiacriticValue(letters[i])) {
      effectedDiacritics.insert(0, letters[i]);
      if (tmpDiacritic.containsKey(letters[i])) {
        tmpDiacritic = tmpDiacritic[letters[i]];

        if (tmpDiacritic is int) {
          finalDiacritics.insert(0, tmpDiacritic);
          tmpDiacritic = _diacriticLigatures;
          effectedDiacritics.clear();
        }
      } else {
        tmpDiacritic = _diacriticLigatures;

        // add all Diacritics if there is no letter Ligatures.
        if (effectedLetters.isEmpty) {
          result.insertAll(0, finalDiacritics);
          result.insertAll(0, effectedDiacritics);
          finalDiacritics.clear();
          effectedDiacritics.clear();
        }
      }
    } else if (tmpLigatures.containsKey(letters[i])) {
      effectedLetters.insert(0, letters[i]);
      tmpLigatures = tmpLigatures[letters[i]];

      if (tmpLigatures is int) {
        result.insert(0, tmpLigatures);
        tmpLigatures = _ligatures;
        effectedLetters.clear();
      }
    } else {
      tmpLigatures = _ligatures;

      // add effected letters if they aren't ligature.
      if (effectedLetters.isNotEmpty) {
        result.insertAll(0, effectedLetters);
        effectedLetters.clear();
      }

      // add Diacritics after or before letter ligature.
      if (effectedLetters.isEmpty && effectedDiacritics.isNotEmpty) {
        result.insertAll(0, effectedDiacritics);
        effectedDiacritics.clear();
      }

      result.insert(0, letters[i]);
    }

    // add Diacritic ligatures.
    if (effectedLetters.isEmpty && finalDiacritics.isNotEmpty) {
      result.insertAll(0, finalDiacritics);
      finalDiacritics.clear();
    }
  }

  return result;
}

int _getCorrectForm(int currentChar, int beforeChar, int nextChar) {
  if (_isInArabicSubstitutionA(currentChar) == false) {
    return _noChangeInForm;
  }
  if (!_arabicLetterHasFinalForm(currentChar) ||
      (!_isArabicLetter(beforeChar) && !_isArabicLetter(nextChar)) ||
      (!_isArabicLetter(nextChar) && _isArabicEndLetter(beforeChar)) ||
      (_isArabicEndLetter(currentChar) && !_isArabicLetter(beforeChar)) ||
      (_isArabicEndLetter(currentChar) && _isArabicAlfLetter(beforeChar)) ||
      (_isArabicEndLetter(currentChar) && _isArabicEndLetter(beforeChar))) {
    return _isolatedForm;
  }

  if (_arabicLetterHasMedialForm(currentChar) &&
      _isArabicLetter(beforeChar) &&
      !_isArabicEndLetter(beforeChar) &&
      _isArabicLetter(nextChar) &&
      _arabicLetterHasFinalForm(nextChar)) {
    return _medialForm;
  }

  if (_isArabicEndLetter(currentChar) || (!_isArabicLetter(nextChar))) {
    return _finalForm;
  }
  return _initialForm;
}

Iterable<String> _parse(String text) sync* {
  final words = text.split(' ');

  final notArabicWords = <List<int>>[];

  var first = true;
  for (var word in words) {
    final newWord = <int>[];
    var isNewWordArabic = false;

    var prevLetter = 0;

    for (var j = 0; j < word.length; j += 1) {
      final currentLetter = word.codeUnitAt(j);

      if (_isArabicDiacritic(currentLetter)) {
        newWord.insert(0, _arabicDiacritics[currentLetter]!);
        continue;
      }
      final nextLetter = word
          .split('')
          .skip(j + 1)
          .map((String e) => e.codeUnitAt(0))
          .firstWhere(
            (int element) => !_isArabicDiacritic(element),
            orElse: () => 0,
          );

      if (_isArabicLetter(currentLetter)) {
        isNewWordArabic = true;

        final position = _getCorrectForm(currentLetter, prevLetter, nextLetter);
        prevLetter = currentLetter;
        if (position != -1) {
          newWord.insert(0, _arabicSubstitionA[currentLetter][position]);
        } else {
          newWord.add(currentLetter);
        }
      } else {
        prevLetter = 0;
        if (isNewWordArabic && currentLetter > 32) {
          newWord.insert(0, currentLetter);
        } else {
          newWord.add(currentLetter);
        }
      }
    }

    if (!first && isNewWordArabic) {
      yield ' ';
    }
    first = false;

    if (isNewWordArabic) {
      isNewWordArabic = false;
      for (var notArabicNewWord in notArabicWords) {
        yield '${String.fromCharCodes(notArabicNewWord)} ';
      }
      notArabicWords.clear();
      yield String.fromCharCodes(_resolveLigatures(newWord));
    } else {
      notArabicWords.insert(0, newWord);
    }
  }
  // if notArabicWords.length != 0, that means all sentence doesn't contain Arabic.
  for (var i = 0; i < notArabicWords.length; i++) {
    yield String.fromCharCodes(notArabicWords[i]);
    if (i != notArabicWords.length - 1) {
      yield ' ';
    }
  }
}

/// Apply Arabic shape substitutions
String convert(String input) {
  return List<String>.from(_parse(input)).join('');
}

[DavBfr]

@Mohamedfaroouk can you create a pull request?

[Mohamedfaroouk]

@Mohamedfaroouk can you create a pull request?

I have sent the request

[gangadharashettypj]

Hey, Can we get similar fix to kannada language also?

[Joseph-Nathan]

thanks bro.

[selvam920]

facing same issue with tamil unicode font

[iampopal]

Facing this issue with Pashto Language, Waiting to get a fix soon.

[iampopal]

Is there any quick fix for this?

[DavBfr]

@iampopal not at all.

[iampopal]

@DavBfr I am using this package It works great for arabic and farsi languages

Please do add pashto special characters in it.

[iampopal]

@DavBfr Or please guide me where shall i add the asci or unicode for pashto language special characters to solve this issue?

[DavBfr]

@iampopal It's all in this file: https://github.com/DavBfr/dart_pdf/blob/master/pdf/lib/src/pdf/font/arabic.dart

[iampopal]

@DavBfr

ګ پ ټ ړ ږ ڼ ځ

These are pashto special characters and not has added to that file.

Or guide me how I get code of these characters and add it to this package.

[DavBfr]

@iampopal Find the codePoints with Dart using:

void main() {
  print('ګ'.codeUnits);
}

[karthikgs-in]

@DavBfr I have a general question about OTF fonts. If one implements the standard specification for a particular language, that should work for all OTF fonts in that language, right?

[DavBfr]

@karthikgs-in Yes, that's the goal. But I'm not an expert with RTL and Script languages. Another solution would be to use something like https://pub.dev/packages/bidi, which should support everything, including Arabic. I've made a PR for null-safety here: https://github.com/xclud/dart_bidi/pulls but that's all I can do.

[Yahllil]

Any update on this one? Hebrew text is mirrored when generating a PDF

[joy2012bd]

Is there any chance you can add this feature soon ? I badly need this :( . Since i have no idea on the variable used in the parsing and how it works i think i wont be able to help much.

Eagerly waiting for your answer on this. Please, can find some of your spare time to add this feature ? Or Milestone ?

Did you find any solution?

[Soorya-S]

I'm also facing a similar issue.

this text is supposed to look like this "ஏய் அங்கே - Hey there 123.,/"

[AkamBarznji]

Hello @DavBfr how can we pay tp solve this can you send me message or send me your email I will pay for fix that

Thanks

[DavBfr]

@AkamBarznji I'm not able to fix this as I don't know how the script languages work.

[AkamBarznji]

What should we can do just let me know to follow this issue and fix ...Thanks

[DavBfr]

I need unit tests at least

[AkamBarznji]

I need unit tests at least

i don't understand well if you explain this I will pay for someone to do that

thanks

[DavBfr]

Maybe a list of strings with different cases and the corresponding image using the notoSans font family. This way I can try to generate the text and compare it to something exact.

[Samuel-Lee-kr]

hello @DavBfr !, If I want to use Korean, it can be solve like arabic.dart? Thanks

[DavBfr]

hello @DavBfr !, If I want to use Korean, it can be solve like arabic.dart? Thanks

Yes that's the way to go.

[Samuel-Lee-kr]

@DavBfr I didn't use arabic.dart, but changed font, it is successfully work. Thanks

[AkamBarznji]

@DavBfr I didn't use arabic.dart, but changed font, it is successfully work. Thanks

Can you please tell me wich font you’re used?

thanks

[AkamBarznji]

@Samuel-Lee-kr I didn't use arabic.dart, but changed font, it is successfully work. Thanks

Can you please tell me wich font you’re used?

thanks

[Samuel-Lee-kr]

@AkamBarznji I used Nanum-Gothic font. It is general font in Korea.

sample code is here

var font = Font.ttf(await rootBundle.load("assets/fonts/NanumGothic-Regular.ttf"));

TextStyle(font: font, );

If you want to get whole code. plz comment again. Thanks

[chetanshivaji]

Facing same problem for Marathi language. I complex combine letter gets converted to two characters.

[ghost]

Would it be possible to use Harfbuzz to do the shaping instead of reimplementing it?

[DavBfr]

@afiefh If someone wants to create a dart package for it, that's an option, yes.

[techttiru]

@Soorya-S - Hi, were you able to fix this problem? I am also having the same problem for tamil font. would be appreciated if you could share the solution if you already fixed it.

[Soorya-S]

@techttiru Hi, nope, I still have that issue.

[techttiru]

@techttiru Hi, nope, I still have that issue.

@Soorya-S Hi, Is there any work around you are doing for this? since tamil font is not rendering properly in pdf, what is the alternate way you are following? any other alternate solution to solve this problem or alternate option to create pdf?

[Soorya-S]

@techttiru I don't have any workaround. I still have this issue and I removed Tami fonts from the pdf as of now. This is also happening in other pdf libraries (including https://pub.dev/packages/pdf). If the Tamil font portion is small enough, you can take a screenshot of that particular area and embed it into the pdf.

[Soorya-S]

@techttiru I don't have any workaround. I still have this issue and I removed Tami fonts from the pdf. This is also happening with other pdf libraries too (including https://pub.dev/packages/pdf). If the Tamil font portion is small enough, you can take a screenshot of that particular area and embed it into the pdf.

Or, if your pdf has only Tamil font, then you can use any Tamil-only TTF fonts (like Vijaya, Azhagu), but your English characters won't print on the pdf doc.

[anandsubbu007]

I will suggest the shortcut (temporary solution) that I use to achieve the text in Tamil or whatever language.

Problem: For the Tamil language when க + ி = கி I didn't get this output. Because it fails when these two characters merge.

So, I did this trick as a temporary solution I downloaded Tamil font and with the help of a font editor, I replaced the unused symbols and replace it with the value (கி) that I need. And whenever that character comes in string i replace it with the symbol that I used.

That's it.

It is working fine for me. This is how I get Tamil font print.

This is only a temporary solution. i believe this will also work for other languages too.

😅

[techttiru]

I will suggest the shortcut (temporary solution) that I use to achieve the text in Tamil or whatever language.

Problem: For the Tamil language when க + ி = கி I didn't get this output. Because it fails when these two characters merge.

So, I did this trick as a temporary solution I downloaded Tamil font and with the help of a font editor, I replaced the unused symbols and replace it with the value (கி) that I need. And whenever that character comes in string i replace it with the symbol that I used.

That's it.

It is working fine for me. This is how I get Tamil font print.

This is only a temporary solution. i believe this will also work for other languages too.

😅

@anandsubbu007 Thanks for responding!. if possible, can you please share the code? i see the exact problem. It would be really appreciated if you could share the code as i could not find any other better than what you are suggesting for now. or if possible, can you please share the edited font for tamil.

[techttiru]

@techttiru I don't have any workaround. I still have this issue and I removed Tami fonts from the pdf. This is also happening with other pdf libraries too (including https://pub.dev/packages/pdf). If the Tamil font portion is small enough, you can take a screenshot of that particular area and embed it into the pdf.

Or, if your pdf has only Tamil font, then you can use any Tamil-only TTF fonts (like Vijaya, Azhagu), but your English characters won't print on the pdf doc.

@Soorya-S - ok. Thanks for responding!

[iampopal]

    s = s
        .replaceAll('ټ', 'ت')
        .replaceAll('ډ', 'د')
        .replaceAll('ښ', 'ش')
        .replaceAll('ړ', 'ر')
        .replaceAll('ږ', 'ژ')
        .replaceAll('ڼ', 'ن')
        .replaceAll('ۍ', 'ی')
        .replaceAll('ۍ', 'ی')
        .replaceAll('ئ', 'ی')
        .replaceAll('ګ', 'گ');

Above is the list of characters that are PASHTO Language not supported by the pdf package, i am trying to replace them with nearly same characters

list of pashto not supported characters is: ټ ښ ډ ړ ږ ڼ ۍ ۍ ئ ګ

   Please let us know when will you guys be adding support for the above Pashto characters

[iampopal]

@DavBfr

if I get Unicode of above characters as

void main() {
  print('ګ'.codeUnits);
}

How will I able to add these pashto characters to the package

[iampopal]

I am unable to understand pdf/lib/src/pdf/font/arabic.dart file

please help me how can I add support for Pashto above commented special characters

[DavBfr]

@iampopal Sorry, me neither, someone else wrote this, I understand only Latin languages.

[anandsubbu007]

I will suggest the shortcut (temporary solution) that I use to achieve the text in Tamil or whatever language. Problem: For the Tamil language when க + ி = கி I didn't get this output. Because it fails when these two characters merge. So, I did this trick as a temporary solution I downloaded Tamil font and with the help of a font editor, I replaced the unused symbols and replace it with the value (கி) that I need. And whenever that character comes in string i replace it with the symbol that I used. That's it. It is working fine for me. This is how I get Tamil font print. This is only a temporary solution. i believe this will also work for other languages too. 😅

@anandsubbu007 Thanks for responding!. if possible, can you please share the code? i see the exact problem. It would be really appreciated if you could share the code as i could not find any other better than what you are suggesting for now. or if possible, can you please share the edited font for tamil.

https://github.com/anandsubbu007/anand-work/tree/BLOC/tamil_pdf

[techttiru]

I will suggest the shortcut (temporary solution) that I use to achieve the text in Tamil or whatever language. Problem: For the Tamil language when க + ி = கி I didn't get this output. Because it fails when these two characters merge. So, I did this trick as a temporary solution I downloaded Tamil font and with the help of a font editor, I replaced the unused symbols and replace it with the value (கி) that I need. And whenever that character comes in string i replace it with the symbol that I used. That's it. It is working fine for me. This is how I get Tamil font print. This is only a temporary solution. i believe this will also work for other languages too. 😅

@anandsubbu007 Thanks for responding!. if possible, can you please share the code? i see the exact problem. It would be really appreciated if you could share the code as i could not find any other better than what you are suggesting for now. or if possible, can you please share the edited font for tamil.

https://github.com/anandsubbu007/anand-work/tree/BLOC/tamil_pdf

@anandsubbu007 - Thanks much Anand. This works nicely.. Really appreciate your response!.. I will do more testing and will share comments if any.

[iampopal]

@iampopal Sorry, me neither, someone else wrote this, I understand only Latin languages.

If possible to introduce the person to me who wrote this will be great, We really need the support for 6 Pashto special characters.