JUCE/modules/juce_graphics/unicode/juce_UnicodeScript.cpp

/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

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*/

namespace juce
{

inline TextScript mapTextScript (UnicodeTextScript type)
{
    JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wswitch-enum")

   #define CASE(in, out) case UnicodeTextScript::in: return TextScript::out
    switch (type)
    {
        CASE (Common,       common);
        CASE (Emoji,        emoji);
        CASE (Arabic,       arabic);
        CASE (Armenian,     armenian);
        CASE (Bengali,      bengali);
        CASE (Bopomofo,     bopomofo);
        CASE (Cyrillic,     cyrillic);
        CASE (Devanagari,   devanagari);
        CASE (Ethiopic,     ethiopic);
        CASE (Georgian,     georgian);
        CASE (Greek,        greek);
        CASE (Gujarati,     gujarati);
        CASE (Gurmukhi,     gurmukhi);
        CASE (Hangul,       hangul);
        CASE (Han,          han);
        CASE (Hebrew,       hebrew);
        CASE (Hiragana,     hiragana);
        CASE (Katakana,     katakana);
        CASE (Kannada,      kannada);
        CASE (Khmer,        khmer);
        CASE (Lao,          lao);
        CASE (Latin,        latin);
        CASE (Malayalam,    malayalam);
        CASE (Myanmar,      myanmar);
        CASE (Oriya,        oriya);
        CASE (Sinhala,      sinhala);
        CASE (Tamil,        tamil);
        CASE (Telugu,       telugu);
        CASE (Thaana,       thaana);
        CASE (Thai,         thai);
        CASE (Tibetan,      tibetan);

        CASE (Adlam,        adlam);
        CASE (Balinese,     balinese);
        CASE (Bamum,        bamum);
        CASE (Batak,        batak);
        CASE (Chakma,       chakma);
        CASE (Cham,         cham);
        CASE (Cherokee,     cherokee);
        CASE (Javanese,     javanese);
        CASE (Kayah_Li,     kayahLi);
        CASE (Tai_Tham,     taiTham);
        CASE (Lepcha,       lepcha);
        CASE (Limbu,        limbu);
        CASE (Lisu,         lisu);
        CASE (Mandaic,      mandaic);
        CASE (Meetei_Mayek, meeteiMayek);
        CASE (Newa,         newa);
        CASE (Nko,          nko);
        CASE (Ol_Chiki,     olChiki);
        CASE (Osage,        osage);
        CASE (Miao,         miao);
        CASE (Saurashtra,   saurashtra);
        CASE (Sundanese,    sundanese);
        CASE (Syloti_Nagri, sylotiNagri);
        CASE (Syriac,       syriac);
        CASE (Tai_Le,       taiLe);
        CASE (New_Tai_Lue,  newTaiLue);
        CASE (Tai_Viet,     taiViet);
        CASE (Tifinagh,     tifinagh);
        CASE (Vai,          vai);
        CASE (Wancho,       wancho);
        CASE (Yi,           yi);

        CASE (Hanifi_Rohingya,        hanifiRohingya);
        CASE (Nyiakeng_Puachue_Hmong, nyiakengPuachueHmong);
        CASE (Canadian_Aboriginal,    canadianAboriginalSyllabics);

    default: break;
    }
   #undef CASE

    JUCE_END_IGNORE_WARNINGS_GCC_LIKE

    return TextScript::common;
}

// TR24
// https://www.unicode.org/reports/tr24/tr24-32.html
namespace tr24
{

template <typename Callback>
void inline analyseScripts (const Span<UnicodeAnalysisPoint> points, Callback&& callback)
{
    bool once = false;
    UnicodeTextScript previousBaseTextScript = UnicodeTextScript::Common;

    for (size_t i = 0; i < points.size(); i++)
    {
        const auto& entry      = points[i].data;
        auto script            = entry.script;

        if (! std::exchange (once, true))
        {
            if (script == UnicodeTextScript::Inherited)
                script = UnicodeTextScript::Common;

            previousBaseTextScript = script;
        }

        if (script == UnicodeTextScript::Common && entry.emoji == EmojiType::extended)
            script = UnicodeTextScript::Emoji;

        // Last part is a hack..
        if (script == UnicodeTextScript::Common || script == UnicodeTextScript::Inherited)
            script = previousBaseTextScript;

        callback ((int) i, mapTextScript (script));
        previousBaseTextScript = script;
    }
}
}

}