// Strong directionality characters // http://www.unicode.org/reports/tr9/#Bidirectional_Character_Types const RIGHT_TO_LEFT = [ // R: [ 0x5be, 0x5be ], [ 0x5c0, 0x5c0 ], [ 0x5c3, 0x5c3 ], [ 0x5c6, 0x5c6 ], [ 0x5d0, 0x5ea ], [ 0x5f0, 0x5f4 ], [ 0x7c0, 0x7ea ], [ 0x7f4, 0x7f5 ], [ 0x7fa, 0x7fa ], [ 0x800, 0x815 ], [ 0x81a, 0x81a ], [ 0x824, 0x824 ], [ 0x828, 0x828 ], [ 0x830, 0x83e ], [ 0x840, 0x858 ], [ 0x85e, 0x85e ], [ 0x200f, 0x200f ], [ 0xfb1d, 0xfb1d ], [ 0xfb1f, 0xfb28 ], [ 0xfb2a, 0xfb36 ], [ 0xfb38, 0xfb3c ], [ 0xfb3e, 0xfb3e ], [ 0xfb40, 0xfb41 ], [ 0xfb43, 0xfb44 ], [ 0xfb46, 0xfb4f ], [ 0x10800, 0x10805 ], [ 0x10808, 0x10808 ], [ 0x1080a, 0x10835 ], [ 0x10837, 0x10838 ], [ 0x1083c, 0x1083c ], [ 0x1083f, 0x10855 ], [ 0x10857, 0x1089e ], [ 0x108a7, 0x108af ], [ 0x108e0, 0x108f2 ], [ 0x108f4, 0x108f5 ], [ 0x108fb, 0x1091b ], [ 0x10920, 0x10939 ], [ 0x1093f, 0x1093f ], [ 0x10980, 0x109b7 ], [ 0x109bc, 0x109cf ], [ 0x109d2, 0x10a00 ], [ 0x10a10, 0x10a13 ], [ 0x10a15, 0x10a17 ], [ 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[ 0x1d4c5, 0x1d505 ], [ 0x1d507, 0x1d50a ], [ 0x1d50d, 0x1d514 ], [ 0x1d516, 0x1d51c ], [ 0x1d51e, 0x1d539 ], [ 0x1d53b, 0x1d53e ], [ 0x1d540, 0x1d544 ], [ 0x1d546, 0x1d546 ], [ 0x1d54a, 0x1d550 ], [ 0x1d552, 0x1d6a5 ], [ 0x1d6a8, 0x1d6da ], [ 0x1d6dc, 0x1d714 ], [ 0x1d716, 0x1d74e ], [ 0x1d750, 0x1d788 ], [ 0x1d78a, 0x1d7c2 ], [ 0x1d7c4, 0x1d7cb ], [ 0x1d800, 0x1d9ff ], [ 0x1da37, 0x1da3a ], [ 0x1da6d, 0x1da74 ], [ 0x1da76, 0x1da83 ], [ 0x1da85, 0x1da8b ], [ 0x1f110, 0x1f12e ], [ 0x1f130, 0x1f169 ], [ 0x1f170, 0x1f1ac ], [ 0x1f1e6, 0x1f202 ], [ 0x1f210, 0x1f23b ], [ 0x1f240, 0x1f248 ], [ 0x1f250, 0x1f251 ], [ 0x20000, 0x20000 ], [ 0x2a6d6, 0x2a6d6 ], [ 0x2a700, 0x2a700 ], [ 0x2b734, 0x2b734 ], [ 0x2b740, 0x2b740 ], [ 0x2b81d, 0x2b81d ], [ 0x2b820, 0x2b820 ], [ 0x2cea1, 0x2cea1 ], [ 0x2f800, 0x2fa1d ], [ 0xf0000, 0xf0000 ], [ 0xffffd, 0xffffd ], [ 0x100000, 0x100000 ], [ 0x10fffd, 0x10fffd ], ]; const createLookUpMap = ( charactersRangeArray ) => { const set = new Set(); charactersRangeArray.forEach( ( range ) => { for ( let i = range[ 0 ]; i <= range[ 1 ]; i++ ) { set.add( i ); } } ); return set; }; const RTL_SET = createLookUpMap( RIGHT_TO_LEFT ); const LTR_SET = createLookUpMap( LEFT_TO_RIGHT ); export const isRTLCharacter = ( character ) => RTL_SET.has( character.charCodeAt( 0 ) ); export const isLTRCharacter = ( character ) => LTR_SET.has( character.charCodeAt( 0 ) );