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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.bidi_js = factory());
}(this, (function () { 'use strict';
function bidiFactory() {
var bidi = (function (exports) {
// Bidi character types data, auto generated
var DATA = {
"R": "13k,1a,2,3,3,2+1j,ch+16,a+1,5+2,2+n,5,a,4,6+16,4+3,h+1b,4mo,179q,2+9,2+11,2i9+7y,2+68,4,3+4,5+13,4+3,2+4k,3+29,8+cf,1t+7z,w+17,3+3m,1t+3z,16o1+5r,8+30,8+mc,29+1r,29+4v,75+73",
"EN": "1c+9,3d+1,6,187+9,513,4+5,7+9,sf+j,175h+9,qw+q,161f+1d,4xt+a,25i+9",
"ES": "17,2,6dp+1,f+1,av,16vr,mx+1,4o,2",
"ET": "z+2,3h+3,b+1,ym,3e+1,2o,p4+1,8,6u,7c,g6,1wc,1n9+4,30+1b,2n,6d,qhx+1,h0m,a+1,49+2,63+1,4+1,6bb+3,12jj",
"AN": "16o+5,2j+9,2+1,35,ed,1ff2+9,87+u",
"CS": "18,2+1,b,2u,12k,55v,l,17v0,2,3,53,2+1,b",
"B": "a,3,f+2,2v,690",
"S": "9,2,k",
"WS": "c,k,4f4,1vk+a,u,1j,335",
"ON": "x+1,4+4,h+5,r+5,r+3,z,5+3,2+1,2+1,5,2+2,3+4,o,w,ci+1,8+d,3+d,6+8,2+g,39+1,9,6+1,2,33,b8,3+1,3c+1,7+1,5r,b,7h+3,sa+5,2,3i+6,jg+3,ur+9,2v,ij+1,9g+9,7+a,8m,4+1,49+x,14u,2+2,c+2,e+2,e+2,e+1,i+n,e+e,2+p,u+2,e+2,36+1,2+3,2+1,b,2+2,6+5,2,2,2,h+1,5+4,6+3,3+f,16+2,5+3l,3+81,1y+p,2+40,q+a,m+13,2r+ch,2+9e,75+hf,3+v,2+2w,6e+5,f+6,75+2a,1a+p,2+2g,d+5x,r+b,6+3,4+o,g,6+1,6+2,2k+1,4,2j,5h+z,1m+1,1e+f,t+2,1f+e,d+3,4o+3,2s+1,w,535+1r,h3l+1i,93+2,2s,b+1,3l+x,2v,4g+3,21+3,kz+1,g5v+1,5a,j+9,n+v,2,3,2+8,2+1,3+2,2,3,46+1,4+4,h+5,r+5,r+a,3h+2,4+6,b+4,78,1r+24,4+c,4,1hb,ey+6,103+j,16j+c,1ux+7,5+g,fsh,jdq+1t,4,57+2e,p1,1m,1m,1m,1m,4kt+1,7j+17,5+2r,d+e,3+e,2+e,2+10,m+4,w,1n+5,1q,4z+5,4b+rb,9+c,4+c,4+37,d+2g,8+b,l+b,5+1j,9+9,7+13,9+t,3+1,27+3c,2+29,2+3q,d+d,3+4,4+2,6+6,a+o,8+6,a+2,e+6,16+42,2+1i",
"BN": "0+8,6+d,2s+5,2+p,e,4m9,1kt+2,2b+5,5+5,17q9+v,7k,6p+8,6+1,119d+3,440+7,96s+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+1,1ekf+75,6p+2rz,1ben+1,1ekf+1,1ekf+1",
"NSM": "lc+33,7o+6,7c+18,2,2+1,2+1,2,21+a,1d+k,h,2u+6,3+5,3+1,2+3,10,v+q,2k+a,1n+8,a,p+3,2+8,2+2,2+4,18+2,3c+e,2+v,1k,2,5+7,5,4+6,b+1,u,1n,5+3,9,l+1,r,3+1,1m,5+1,5+1,3+2,4,v+1,4,c+1,1m,5+4,2+1,5,l+1,n+5,2,1n,3,2+3,9,8+1,c+1,v,1q,d,1f,4,1m+2,6+2,2+3,8+1,c+1,u,1n,g+1,l+1,t+1,1m+1,5+3,9,l+1,u,21,8+2,2,2j,3+6,d+7,2r,3+8,c+5,23+1,s,2,2,1k+d,2+4,2+1,6+a,2+z,a,2v+3,2+5,2+1,3+1,q+1,5+2,h+3,e,3+1,7,g,jk+2,qb+2,u+2,u+1,v+1,1t+1,2+6,9,3+a,a,1a+2,3c+1,z,3b+2,5+1,a,7+2,64+1,3,1n,2+6,2,2,3+7,7+9,3,1d+g,1s+3,1d,2+4,2,6,15+8,d+1,x+3,3+1,2+2,1l,2+1,4,2+2,1n+7,3+1,49+2,2+c,2+6,5,7,4+1,5j+1l,2+4,k1+w,2db+2,3y,2p+v,ff+3,30+1,n9x+3,2+9,x+1,29+1,7l,4,5,q+1,6,48+1,r+h,e,13+7,q+a,1b+2,1d,3+3,3+1,14,1w+5,3+1,3+1,d,9,1c,1g,2+2,3+1,6+1,2,17+1,9,6n,3,5,fn5,ki+f,h+f,r2,6b,46+4,1af+2,2+1,6+3,15+2,5,4m+1,fy+3,as+1,4a+a,4x,1j+e,1l+2,1e+3,3+1,1y+2,11+4,2+7,1r,d+1,1h+8,b+3,3,2o+2,3,2+1,7,4h,4+7,m+1,1m+1,4,12+6,4+4,5g+7,3+2,2,o,2d+5,2,5+1,2+1,6n+3,7+1,2+1,s+1,2e+7,3,2+1,2z,2,3+5,2,2u+2,3+3,2+4,78+8,2+1,75+1,2,5,41+3,3+1,5,x+5,3+1,15+5,3+3,9,a+5,3+2,1b+c,2+1,bb+6,2+5,2d+l,3+6,2+1,2+1,3f+5,4,2+1,2+6,2,21+1,4,2,9o+1,f0c+4,1o+6,t5,1s+3,2a,f5l+1,43t+2,i+7,3+6,v+3,45+2,1j0+1i,5+1d,9,f,n+4,2+e,11t+6,2+g,3+6,2+1,2+4,7a+6,c6+3,15t+6,32+6,gzhy+6n",
"AL": "16w,3,2,e+1b,z+2,2+2s,g+1,8+1,b+m,2+t,s+2i,c+e,4h+f,1d+1e,1bwe+dp,3+3z,x+c,2+1,35+3y,2rm+z,5+7,b+5,dt+l,c+u,17nl+27,1t+27,4x+6n,3+d",
"LRO": "6ct",
"RLO": "6cu",
"LRE": "6cq",
"RLE": "6cr",
"PDF": "6cs",
"LRI": "6ee",
"RLI": "6ef",
"FSI": "6eg",
"PDI": "6eh"
};
var TYPES = {};
var TYPES_TO_NAMES = {};
TYPES.L = 1; //L is the default
TYPES_TO_NAMES[1] = 'L';
Object.keys(DATA).forEach(function (type, i) {
TYPES[type] = 1 << (i + 1);
TYPES_TO_NAMES[TYPES[type]] = type;
});
Object.freeze(TYPES);
var ISOLATE_INIT_TYPES = TYPES.LRI | TYPES.RLI | TYPES.FSI;
var STRONG_TYPES = TYPES.L | TYPES.R | TYPES.AL;
var NEUTRAL_ISOLATE_TYPES = TYPES.B | TYPES.S | TYPES.WS | TYPES.ON | TYPES.FSI | TYPES.LRI | TYPES.RLI | TYPES.PDI;
var BN_LIKE_TYPES = TYPES.BN | TYPES.RLE | TYPES.LRE | TYPES.RLO | TYPES.LRO | TYPES.PDF;
var TRAILING_TYPES = TYPES.S | TYPES.WS | TYPES.B | ISOLATE_INIT_TYPES | TYPES.PDI | BN_LIKE_TYPES;
var map = null;
function parseData () {
if (!map) {
//const start = performance.now()
map = new Map();
var loop = function ( type ) {
if (DATA.hasOwnProperty(type)) {
var lastCode = 0;
DATA[type].split(',').forEach(function (range) {
var ref = range.split('+');
var skip = ref[0];
var step = ref[1];
skip = parseInt(skip, 36);
step = step ? parseInt(step, 36) : 0;
map.set(lastCode += skip, TYPES[type]);
for (var i = 0; i < step; i++) {
map.set(++lastCode, TYPES[type]);
}
});
}
};
for (var type in DATA) loop( type );
//console.log(`char types parsed in ${performance.now() - start}ms`)
}
}
/**
* @param {string} char
* @return {number}
*/
function getBidiCharType (char) {
parseData();
return map.get(char.codePointAt(0)) || TYPES.L
}
function getBidiCharTypeName(char) {
return TYPES_TO_NAMES[getBidiCharType(char)]
}
// Bidi bracket pairs data, auto generated
var data$1 = {
"pairs": "14>1,1e>2,u>2,2wt>1,1>1,1ge>1,1wp>1,1j>1,f>1,hm>1,1>1,u>1,u6>1,1>1,+5,28>1,w>1,1>1,+3,b8>1,1>1,+3,1>3,-1>-1,3>1,1>1,+2,1s>1,1>1,x>1,th>1,1>1,+2,db>1,1>1,+3,3>1,1>1,+2,14qm>1,1>1,+1,4q>1,1e>2,u>2,2>1,+1",
"canonical": "6f1>-6dx,6dy>-6dx,6ec>-6ed,6ee>-6ed,6ww>2jj,-2ji>2jj,14r4>-1e7l,1e7m>-1e7l,1e7m>-1e5c,1e5d>-1e5b,1e5c>-14qx,14qy>-14qx,14vn>-1ecg,1ech>-1ecg,1edu>-1ecg,1eci>-1ecg,1eda>-1ecg,1eci>-1ecg,1eci>-168q,168r>-168q,168s>-14ye,14yf>-14ye"
};
/**
* Parses an string that holds encoded codepoint mappings, e.g. for bracket pairs or
* mirroring characters, as encoded by scripts/generateBidiData.js. Returns an object
* holding the `map`, and optionally a `reverseMap` if `includeReverse:true`.
* @param {string} encodedString
* @param {boolean} includeReverse - true if you want reverseMap in the output
* @return {{map: Map<number, number>, reverseMap?: Map<number, number>}}
*/
function parseCharacterMap (encodedString, includeReverse) {
var radix = 36;
var lastCode = 0;
var map = new Map();
var reverseMap = includeReverse && new Map();
var prevPair;
encodedString.split(',').forEach(function visit(entry) {
if (entry.indexOf('+') !== -1) {
for (var i = +entry; i--;) {
visit(prevPair);
}
} else {
prevPair = entry;
var ref = entry.split('>');
var a = ref[0];
var b = ref[1];
a = String.fromCodePoint(lastCode += parseInt(a, radix));
b = String.fromCodePoint(lastCode += parseInt(b, radix));
map.set(a, b);
includeReverse && reverseMap.set(b, a);
}
});
return { map: map, reverseMap: reverseMap }
}
var openToClose, closeToOpen, canonical;
function parse$1 () {
if (!openToClose) {
//const start = performance.now()
var ref = parseCharacterMap(data$1.pairs, true);
var map = ref.map;
var reverseMap = ref.reverseMap;
openToClose = map;
closeToOpen = reverseMap;
canonical = parseCharacterMap(data$1.canonical, false).map;
//console.log(`brackets parsed in ${performance.now() - start}ms`)
}
}
function openingToClosingBracket (char) {
parse$1();
return openToClose.get(char) || null
}
function closingToOpeningBracket (char) {
parse$1();
return closeToOpen.get(char) || null
}
function getCanonicalBracket (char) {
parse$1();
return canonical.get(char) || null
}
// Local type aliases
var TYPE_L = TYPES.L;
var TYPE_R = TYPES.R;
var TYPE_EN = TYPES.EN;
var TYPE_ES = TYPES.ES;
var TYPE_ET = TYPES.ET;
var TYPE_AN = TYPES.AN;
var TYPE_CS = TYPES.CS;
var TYPE_B = TYPES.B;
var TYPE_S = TYPES.S;
var TYPE_ON = TYPES.ON;
var TYPE_BN = TYPES.BN;
var TYPE_NSM = TYPES.NSM;
var TYPE_AL = TYPES.AL;
var TYPE_LRO = TYPES.LRO;
var TYPE_RLO = TYPES.RLO;
var TYPE_LRE = TYPES.LRE;
var TYPE_RLE = TYPES.RLE;
var TYPE_PDF = TYPES.PDF;
var TYPE_LRI = TYPES.LRI;
var TYPE_RLI = TYPES.RLI;
var TYPE_FSI = TYPES.FSI;
var TYPE_PDI = TYPES.PDI;
/**
* @typedef {object} GetEmbeddingLevelsResult
* @property {{start, end, level}[]} paragraphs
* @property {Uint8Array} levels
*/
/**
* This function applies the Bidirectional Algorithm to a string, returning the resolved embedding levels
* in a single Uint8Array plus a list of objects holding each paragraph's start and end indices and resolved
* base embedding level.
*
* @param {string} string - The input string
* @param {"ltr"|"rtl"|"auto"} [baseDirection] - Use "ltr" or "rtl" to force a base paragraph direction,
* otherwise a direction will be chosen automatically from each paragraph's contents.
* @return {GetEmbeddingLevelsResult}
*/
function getEmbeddingLevels (string, baseDirection) {
var MAX_DEPTH = 125;
// Start by mapping all characters to their unicode type, as a bitmask integer
var charTypes = new Uint32Array(string.length);
for (var i = 0; i < string.length; i++) {
charTypes[i] = getBidiCharType(string[i]);
}
var charTypeCounts = new Map(); //will be cleared at start of each paragraph
function changeCharType(i, type) {
var oldType = charTypes[i];
charTypes[i] = type;
charTypeCounts.set(oldType, charTypeCounts.get(oldType) - 1);
if (oldType & NEUTRAL_ISOLATE_TYPES) {
charTypeCounts.set(NEUTRAL_ISOLATE_TYPES, charTypeCounts.get(NEUTRAL_ISOLATE_TYPES) - 1);
}
charTypeCounts.set(type, (charTypeCounts.get(type) || 0) + 1);
if (type & NEUTRAL_ISOLATE_TYPES) {
charTypeCounts.set(NEUTRAL_ISOLATE_TYPES, (charTypeCounts.get(NEUTRAL_ISOLATE_TYPES) || 0) + 1);
}
}
var embedLevels = new Uint8Array(string.length);
var isolationPairs = new Map(); //init->pdi and pdi->init
// === 3.3.1 The Paragraph Level ===
// 3.3.1 P1: Split the text into paragraphs
var paragraphs = []; // [{start, end, level}, ...]
var paragraph = null;
for (var i$1 = 0; i$1 < string.length; i$1++) {
if (!paragraph) {
paragraphs.push(paragraph = {
start: i$1,
end: string.length - 1,
// 3.3.1 P2-P3: Determine the paragraph level
level: baseDirection === 'rtl' ? 1 : baseDirection === 'ltr' ? 0 : determineAutoEmbedLevel(i$1, false)
});
}
if (charTypes[i$1] & TYPE_B) {
paragraph.end = i$1;
paragraph = null;
}
}
var FORMATTING_TYPES = TYPE_RLE | TYPE_LRE | TYPE_RLO | TYPE_LRO | ISOLATE_INIT_TYPES | TYPE_PDI | TYPE_PDF | TYPE_B;
var nextEven = function (n) { return n + ((n & 1) ? 1 : 2); };
var nextOdd = function (n) { return n + ((n & 1) ? 2 : 1); };
// Everything from here on will operate per paragraph.
for (var paraIdx = 0; paraIdx < paragraphs.length; paraIdx++) {
paragraph = paragraphs[paraIdx];
var statusStack = [{
_level: paragraph.level,
_override: 0, //0=neutral, 1=L, 2=R
_isolate: 0 //bool
}];
var stackTop = (void 0);
var overflowIsolateCount = 0;
var overflowEmbeddingCount = 0;
var validIsolateCount = 0;
charTypeCounts.clear();
// === 3.3.2 Explicit Levels and Directions ===
for (var i$2 = paragraph.start; i$2 <= paragraph.end; i$2++) {
var charType = charTypes[i$2];
stackTop = statusStack[statusStack.length - 1];
// Set initial counts
charTypeCounts.set(charType, (charTypeCounts.get(charType) || 0) + 1);
if (charType & NEUTRAL_ISOLATE_TYPES) {
charTypeCounts.set(NEUTRAL_ISOLATE_TYPES, (charTypeCounts.get(NEUTRAL_ISOLATE_TYPES) || 0) + 1);
}
// Explicit Embeddings: 3.3.2 X2 - X3
if (charType & FORMATTING_TYPES) { //prefilter all formatters
if (charType & (TYPE_RLE | TYPE_LRE)) {
embedLevels[i$2] = stackTop._level; // 5.2
var level = (charType === TYPE_RLE ? nextOdd : nextEven)(stackTop._level);
if (level <= MAX_DEPTH && !overflowIsolateCount && !overflowEmbeddingCount) {
statusStack.push({
_level: level,
_override: 0,
_isolate: 0
});
} else if (!overflowIsolateCount) {
overflowEmbeddingCount++;
}
}
// Explicit Overrides: 3.3.2 X4 - X5
else if (charType & (TYPE_RLO | TYPE_LRO)) {
embedLevels[i$2] = stackTop._level; // 5.2
var level$1 = (charType === TYPE_RLO ? nextOdd : nextEven)(stackTop._level);
if (level$1 <= MAX_DEPTH && !overflowIsolateCount && !overflowEmbeddingCount) {
statusStack.push({
_level: level$1,
_override: (charType & TYPE_RLO) ? TYPE_R : TYPE_L,
_isolate: 0
});
} else if (!overflowIsolateCount) {
overflowEmbeddingCount++;
}
}
// Isolates: 3.3.2 X5a - X5c
else if (charType & ISOLATE_INIT_TYPES) {
// X5c - FSI becomes either RLI or LRI
if (charType & TYPE_FSI) {
charType = determineAutoEmbedLevel(i$2 + 1, true) === 1 ? TYPE_RLI : TYPE_LRI;
}
embedLevels[i$2] = stackTop._level;
if (stackTop._override) {
changeCharType(i$2, stackTop._override);
}
var level$2 = (charType === TYPE_RLI ? nextOdd : nextEven)(stackTop._level);
if (level$2 <= MAX_DEPTH && overflowIsolateCount === 0 && overflowEmbeddingCount === 0) {
validIsolateCount++;
statusStack.push({
_level: level$2,
_override: 0,
_isolate: 1,
_isolInitIndex: i$2
});
} else {
overflowIsolateCount++;
}
}
// Terminating Isolates: 3.3.2 X6a
else if (charType & TYPE_PDI) {
if (overflowIsolateCount > 0) {
overflowIsolateCount--;
} else if (validIsolateCount > 0) {
overflowEmbeddingCount = 0;
while (!statusStack[statusStack.length - 1]._isolate) {
statusStack.pop();
}
// Add to isolation pairs bidirectional mapping:
var isolInitIndex = statusStack[statusStack.length - 1]._isolInitIndex;
if (isolInitIndex != null) {
isolationPairs.set(isolInitIndex, i$2);
isolationPairs.set(i$2, isolInitIndex);
}
statusStack.pop();
validIsolateCount--;
}
stackTop = statusStack[statusStack.length - 1];
embedLevels[i$2] = stackTop._level;
if (stackTop._override) {
changeCharType(i$2, stackTop._override);
}
}
// Terminating Embeddings and Overrides: 3.3.2 X7
else if (charType & TYPE_PDF) {
if (overflowIsolateCount === 0) {
if (overflowEmbeddingCount > 0) {
overflowEmbeddingCount--;
} else if (!stackTop._isolate && statusStack.length > 1) {
statusStack.pop();
stackTop = statusStack[statusStack.length - 1];
}
}
embedLevels[i$2] = stackTop._level; // 5.2
}
// End of Paragraph: 3.3.2 X8
else if (charType & TYPE_B) {
embedLevels[i$2] = paragraph.level;
}
}
// Non-formatting characters: 3.3.2 X6
else {
embedLevels[i$2] = stackTop._level;
// NOTE: This exclusion of BN seems to go against what section 5.2 says, but is required for test passage
if (stackTop._override && charType !== TYPE_BN) {
changeCharType(i$2, stackTop._override);
}
}
}
// === 3.3.3 Preparations for Implicit Processing ===
// Remove all RLE, LRE, RLO, LRO, PDF, and BN characters: 3.3.3 X9
// Note: Due to section 5.2, we won't remove them, but we'll use the BN_LIKE_TYPES bitset to
// easily ignore them all from here on out.
// 3.3.3 X10
// Compute the set of isolating run sequences as specified by BD13
var levelRuns = [];
var currentRun = null;
for (var i$3 = paragraph.start; i$3 <= paragraph.end; i$3++) {
var charType$1 = charTypes[i$3];
if (!(charType$1 & BN_LIKE_TYPES)) {
var lvl = embedLevels[i$3];
var isIsolInit = charType$1 & ISOLATE_INIT_TYPES;
var isPDI = charType$1 === TYPE_PDI;
if (currentRun && lvl === currentRun._level) {
currentRun._end = i$3;
currentRun._endsWithIsolInit = isIsolInit;
} else {
levelRuns.push(currentRun = {
_start: i$3,
_end: i$3,
_level: lvl,
_startsWithPDI: isPDI,
_endsWithIsolInit: isIsolInit
});
}
}
}
var isolatingRunSeqs = []; // [{seqIndices: [], sosType: L|R, eosType: L|R}]
for (var runIdx = 0; runIdx < levelRuns.length; runIdx++) {
var run = levelRuns[runIdx];
if (!run._startsWithPDI || (run._startsWithPDI && !isolationPairs.has(run._start))) {
var seqRuns = [currentRun = run];
for (var pdiIndex = (void 0); currentRun && currentRun._endsWithIsolInit && (pdiIndex = isolationPairs.get(currentRun._end)) != null;) {
for (var i$4 = runIdx + 1; i$4 < levelRuns.length; i$4++) {
if (levelRuns[i$4]._start === pdiIndex) {
seqRuns.push(currentRun = levelRuns[i$4]);
break
}
}
}
// build flat list of indices across all runs:
var seqIndices = [];
for (var i$5 = 0; i$5 < seqRuns.length; i$5++) {
var run$1 = seqRuns[i$5];
for (var j = run$1._start; j <= run$1._end; j++) {
seqIndices.push(j);
}
}
// determine the sos/eos types:
var firstLevel = embedLevels[seqIndices[0]];
var prevLevel = paragraph.level;
for (var i$6 = seqIndices[0] - 1; i$6 >= 0; i$6--) {
if (!(charTypes[i$6] & BN_LIKE_TYPES)) { //5.2
prevLevel = embedLevels[i$6];
break
}
}
var lastIndex = seqIndices[seqIndices.length - 1];
var lastLevel = embedLevels[lastIndex];
var nextLevel = paragraph.level;
if (!(charTypes[lastIndex] & ISOLATE_INIT_TYPES)) {
for (var i$7 = lastIndex + 1; i$7 <= paragraph.end; i$7++) {
if (!(charTypes[i$7] & BN_LIKE_TYPES)) { //5.2
nextLevel = embedLevels[i$7];
break
}
}
}
isolatingRunSeqs.push({
_seqIndices: seqIndices,
_sosType: Math.max(prevLevel, firstLevel) % 2 ? TYPE_R : TYPE_L,
_eosType: Math.max(nextLevel, lastLevel) % 2 ? TYPE_R : TYPE_L
});
}
}
// The next steps are done per isolating run sequence
for (var seqIdx = 0; seqIdx < isolatingRunSeqs.length; seqIdx++) {
var ref = isolatingRunSeqs[seqIdx];
var seqIndices$1 = ref._seqIndices;
var sosType = ref._sosType;
var eosType = ref._eosType;
/**
* All the level runs in an isolating run sequence have the same embedding level.
*
* DO NOT change any `embedLevels[i]` within the current scope.
*/
var embedDirection = ((embedLevels[seqIndices$1[0]]) & 1) ? TYPE_R : TYPE_L;
// === 3.3.4 Resolving Weak Types ===
// W1 + 5.2. Search backward from each NSM to the first character in the isolating run sequence whose
// bidirectional type is not BN, and set the NSM to ON if it is an isolate initiator or PDI, and to its
// type otherwise. If the NSM is the first non-BN character, change the NSM to the type of sos.
if (charTypeCounts.get(TYPE_NSM)) {
for (var si = 0; si < seqIndices$1.length; si++) {
var i$8 = seqIndices$1[si];
if (charTypes[i$8] & TYPE_NSM) {
var prevType = sosType;
for (var sj = si - 1; sj >= 0; sj--) {
if (!(charTypes[seqIndices$1[sj]] & BN_LIKE_TYPES)) { //5.2 scan back to first non-BN
prevType = charTypes[seqIndices$1[sj]];
break
}
}
changeCharType(i$8, (prevType & (ISOLATE_INIT_TYPES | TYPE_PDI)) ? TYPE_ON : prevType);
}
}
}
// W2. Search backward from each instance of a European number until the first strong type (R, L, AL, or sos)
// is found. If an AL is found, change the type of the European number to Arabic number.
if (charTypeCounts.get(TYPE_EN)) {
for (var si$1 = 0; si$1 < seqIndices$1.length; si$1++) {
var i$9 = seqIndices$1[si$1];
if (charTypes[i$9] & TYPE_EN) {
for (var sj$1 = si$1 - 1; sj$1 >= -1; sj$1--) {
var prevCharType = sj$1 === -1 ? sosType : charTypes[seqIndices$1[sj$1]];
if (prevCharType & STRONG_TYPES) {
if (prevCharType === TYPE_AL) {
changeCharType(i$9, TYPE_AN);
}
break
}
}
}
}
}
// W3. Change all ALs to R
if (charTypeCounts.get(TYPE_AL)) {
for (var si$2 = 0; si$2 < seqIndices$1.length; si$2++) {
var i$10 = seqIndices$1[si$2];
if (charTypes[i$10] & TYPE_AL) {
changeCharType(i$10, TYPE_R);
}
}
}
// W4. A single European separator between two European numbers changes to a European number. A single common
// separator between two numbers of the same type changes to that type.
if (charTypeCounts.get(TYPE_ES) || charTypeCounts.get(TYPE_CS)) {
for (var si$3 = 1; si$3 < seqIndices$1.length - 1; si$3++) {
var i$11 = seqIndices$1[si$3];
if (charTypes[i$11] & (TYPE_ES | TYPE_CS)) {
var prevType$1 = 0, nextType = 0;
for (var sj$2 = si$3 - 1; sj$2 >= 0; sj$2--) {
prevType$1 = charTypes[seqIndices$1[sj$2]];
if (!(prevType$1 & BN_LIKE_TYPES)) { //5.2
break
}
}
for (var sj$3 = si$3 + 1; sj$3 < seqIndices$1.length; sj$3++) {
nextType = charTypes[seqIndices$1[sj$3]];
if (!(nextType & BN_LIKE_TYPES)) { //5.2
break
}
}
if (prevType$1 === nextType && (charTypes[i$11] === TYPE_ES ? prevType$1 === TYPE_EN : (prevType$1 & (TYPE_EN | TYPE_AN)))) {
changeCharType(i$11, prevType$1);
}
}
}
}
// W5. A sequence of European terminators adjacent to European numbers changes to all European numbers.
if (charTypeCounts.get(TYPE_EN)) {
for (var si$4 = 0; si$4 < seqIndices$1.length; si$4++) {
var i$12 = seqIndices$1[si$4];
if (charTypes[i$12] & TYPE_EN) {
for (var sj$4 = si$4 - 1; sj$4 >= 0 && (charTypes[seqIndices$1[sj$4]] & (TYPE_ET | BN_LIKE_TYPES)); sj$4--) {
changeCharType(seqIndices$1[sj$4], TYPE_EN);
}
for (si$4++; si$4 < seqIndices$1.length && (charTypes[seqIndices$1[si$4]] & (TYPE_ET | BN_LIKE_TYPES | TYPE_EN)); si$4++) {
if (charTypes[seqIndices$1[si$4]] !== TYPE_EN) {
changeCharType(seqIndices$1[si$4], TYPE_EN);
}
}
}
}
}
// W6. Otherwise, separators and terminators change to Other Neutral.
if (charTypeCounts.get(TYPE_ET) || charTypeCounts.get(TYPE_ES) || charTypeCounts.get(TYPE_CS)) {
for (var si$5 = 0; si$5 < seqIndices$1.length; si$5++) {
var i$13 = seqIndices$1[si$5];
if (charTypes[i$13] & (TYPE_ET | TYPE_ES | TYPE_CS)) {
changeCharType(i$13, TYPE_ON);
// 5.2 transform adjacent BNs too:
for (var sj$5 = si$5 - 1; sj$5 >= 0 && (charTypes[seqIndices$1[sj$5]] & BN_LIKE_TYPES); sj$5--) {
changeCharType(seqIndices$1[sj$5], TYPE_ON);
}
for (var sj$6 = si$5 + 1; sj$6 < seqIndices$1.length && (charTypes[seqIndices$1[sj$6]] & BN_LIKE_TYPES); sj$6++) {
changeCharType(seqIndices$1[sj$6], TYPE_ON);
}
}
}
}
// W7. Search backward from each instance of a European number until the first strong type (R, L, or sos)
// is found. If an L is found, then change the type of the European number to L.
// NOTE: implemented in single forward pass for efficiency
if (charTypeCounts.get(TYPE_EN)) {
for (var si$6 = 0, prevStrongType = sosType; si$6 < seqIndices$1.length; si$6++) {
var i$14 = seqIndices$1[si$6];
var type = charTypes[i$14];
if (type & TYPE_EN) {
if (prevStrongType === TYPE_L) {
changeCharType(i$14, TYPE_L);
}
} else if (type & STRONG_TYPES) {
prevStrongType = type;
}
}
}
// === 3.3.5 Resolving Neutral and Isolate Formatting Types ===
if (charTypeCounts.get(NEUTRAL_ISOLATE_TYPES)) {
// N0. Process bracket pairs in an isolating run sequence sequentially in the logical order of the text
// positions of the opening paired brackets using the logic given below. Within this scope, bidirectional
// types EN and AN are treated as R.
var R_TYPES_FOR_N_STEPS = (TYPE_R | TYPE_EN | TYPE_AN);
var STRONG_TYPES_FOR_N_STEPS = R_TYPES_FOR_N_STEPS | TYPE_L;
// * Identify the bracket pairs in the current isolating run sequence according to BD16.
var bracketPairs = [];
{
var openerStack = [];
for (var si$7 = 0; si$7 < seqIndices$1.length; si$7++) {
// NOTE: for any potential bracket character we also test that it still carries a NI
// type, as that may have been changed earlier. This doesn't seem to be explicitly
// called out in the spec, but is required for passage of certain tests.
if (charTypes[seqIndices$1[si$7]] & NEUTRAL_ISOLATE_TYPES) {
var char = string[seqIndices$1[si$7]];
var oppositeBracket = (void 0);
// Opening bracket
if (openingToClosingBracket(char) !== null) {
if (openerStack.length < 63) {
openerStack.push({ char: char, seqIndex: si$7 });
} else {
break
}
}
// Closing bracket
else if ((oppositeBracket = closingToOpeningBracket(char)) !== null) {
for (var stackIdx = openerStack.length - 1; stackIdx >= 0; stackIdx--) {
var stackChar = openerStack[stackIdx].char;
if (stackChar === oppositeBracket ||
stackChar === closingToOpeningBracket(getCanonicalBracket(char)) ||
openingToClosingBracket(getCanonicalBracket(stackChar)) === char
) {
bracketPairs.push([openerStack[stackIdx].seqIndex, si$7]);
openerStack.length = stackIdx; //pop the matching bracket and all following
break
}
}
}
}
}
bracketPairs.sort(function (a, b) { return a[0] - b[0]; });
}
// * For each bracket-pair element in the list of pairs of text positions
for (var pairIdx = 0; pairIdx < bracketPairs.length; pairIdx++) {
var ref$1 = bracketPairs[pairIdx];
var openSeqIdx = ref$1[0];
var closeSeqIdx = ref$1[1];
// a. Inspect the bidirectional types of the characters enclosed within the bracket pair.
// b. If any strong type (either L or R) matching the embedding direction is found, set the type for both
// brackets in the pair to match the embedding direction.
var foundStrongType = false;
var useStrongType = 0;
for (var si$8 = openSeqIdx + 1; si$8 < closeSeqIdx; si$8++) {
var i$15 = seqIndices$1[si$8];
if (charTypes[i$15] & STRONG_TYPES_FOR_N_STEPS) {
foundStrongType = true;
var lr = (charTypes[i$15] & R_TYPES_FOR_N_STEPS) ? TYPE_R : TYPE_L;
if (lr === embedDirection) {
useStrongType = lr;
break
}
}
}
// c. Otherwise, if there is a strong type it must be opposite the embedding direction. Therefore, test
// for an established context with a preceding strong type by checking backwards before the opening paired
// bracket until the first strong type (L, R, or sos) is found.
// 1. If the preceding strong type is also opposite the embedding direction, context is established, so
// set the type for both brackets in the pair to that direction.
// 2. Otherwise set the type for both brackets in the pair to the embedding direction.
if (foundStrongType && !useStrongType) {
useStrongType = sosType;
for (var si$9 = openSeqIdx - 1; si$9 >= 0; si$9--) {
var i$16 = seqIndices$1[si$9];
if (charTypes[i$16] & STRONG_TYPES_FOR_N_STEPS) {
var lr$1 = (charTypes[i$16] & R_TYPES_FOR_N_STEPS) ? TYPE_R : TYPE_L;
if (lr$1 !== embedDirection) {
useStrongType = lr$1;
} else {
useStrongType = embedDirection;
}
break
}
}
}
if (useStrongType) {
charTypes[seqIndices$1[openSeqIdx]] = charTypes[seqIndices$1[closeSeqIdx]] = useStrongType;
// * Any number of characters that had original bidirectional character type NSM prior to the application
// of W1 that immediately follow a paired bracket which changed to L or R under N0 should change to match
// the type of their preceding bracket.
if (useStrongType !== embedDirection) {
for (var si$10 = openSeqIdx + 1; si$10 < seqIndices$1.length; si$10++) {
if (!(charTypes[seqIndices$1[si$10]] & BN_LIKE_TYPES)) {
if (getBidiCharType(string[seqIndices$1[si$10]]) & TYPE_NSM) {
charTypes[seqIndices$1[si$10]] = useStrongType;
}
break
}
}
}
if (useStrongType !== embedDirection) {
for (var si$11 = closeSeqIdx + 1; si$11 < seqIndices$1.length; si$11++) {
if (!(charTypes[seqIndices$1[si$11]] & BN_LIKE_TYPES)) {
if (getBidiCharType(string[seqIndices$1[si$11]]) & TYPE_NSM) {
charTypes[seqIndices$1[si$11]] = useStrongType;
}
break
}
}
}
}
}
// N1. A sequence of NIs takes the direction of the surrounding strong text if the text on both sides has the
// same direction.
// N2. Any remaining NIs take the embedding direction.
for (var si$12 = 0; si$12 < seqIndices$1.length; si$12++) {
if (charTypes[seqIndices$1[si$12]] & NEUTRAL_ISOLATE_TYPES) {
var niRunStart = si$12, niRunEnd = si$12;
var prevType$2 = sosType; //si === 0 ? sosType : (charTypes[seqIndices[si - 1]] & R_TYPES_FOR_N_STEPS) ? TYPE_R : TYPE_L
for (var si2 = si$12 - 1; si2 >= 0; si2--) {
if (charTypes[seqIndices$1[si2]] & BN_LIKE_TYPES) {
niRunStart = si2; //5.2 treat BNs adjacent to NIs as NIs
} else {
prevType$2 = (charTypes[seqIndices$1[si2]] & R_TYPES_FOR_N_STEPS) ? TYPE_R : TYPE_L;
break
}
}
var nextType$1 = eosType;
for (var si2$1 = si$12 + 1; si2$1 < seqIndices$1.length; si2$1++) {
if (charTypes[seqIndices$1[si2$1]] & (NEUTRAL_ISOLATE_TYPES | BN_LIKE_TYPES)) {
niRunEnd = si2$1;
} else {
nextType$1 = (charTypes[seqIndices$1[si2$1]] & R_TYPES_FOR_N_STEPS) ? TYPE_R : TYPE_L;
break
}
}
for (var sj$7 = niRunStart; sj$7 <= niRunEnd; sj$7++) {
charTypes[seqIndices$1[sj$7]] = prevType$2 === nextType$1 ? prevType$2 : embedDirection;
}
si$12 = niRunEnd;
}
}
}
}
// === 3.3.6 Resolving Implicit Levels ===
for (var i$17 = paragraph.start; i$17 <= paragraph.end; i$17++) {
var level$3 = embedLevels[i$17];
var type$1 = charTypes[i$17];
// I2. For all characters with an odd (right-to-left) embedding level, those of type L, EN or AN go up one level.
if (level$3 & 1) {
if (type$1 & (TYPE_L | TYPE_EN | TYPE_AN)) {
embedLevels[i$17]++;
}
}
// I1. For all characters with an even (left-to-right) embedding level, those of type R go up one level
// and those of type AN or EN go up two levels.
else {
if (type$1 & TYPE_R) {
embedLevels[i$17]++;
} else if (type$1 & (TYPE_AN | TYPE_EN)) {
embedLevels[i$17] += 2;
}
}
// 5.2: Resolve any LRE, RLE, LRO, RLO, PDF, or BN to the level of the preceding character if there is one,
// and otherwise to the base level.
if (type$1 & BN_LIKE_TYPES) {
embedLevels[i$17] = i$17 === 0 ? paragraph.level : embedLevels[i$17 - 1];
}
// 3.4 L1.1-4: Reset the embedding level of segment/paragraph separators, and any sequence of whitespace or
// isolate formatting characters preceding them or the end of the paragraph, to the paragraph level.
// NOTE: this will also need to be applied to each individual line ending after line wrapping occurs.
if (i$17 === paragraph.end || getBidiCharType(string[i$17]) & (TYPE_S | TYPE_B)) {
for (var j$1 = i$17; j$1 >= 0 && (getBidiCharType(string[j$1]) & TRAILING_TYPES); j$1--) {
embedLevels[j$1] = paragraph.level;
}
}
}
}
// DONE! The resolved levels can then be used, after line wrapping, to flip runs of characters
// according to section 3.4 Reordering Resolved Levels
return {
levels: embedLevels,
paragraphs: paragraphs
}
function determineAutoEmbedLevel (start, isFSI) {
// 3.3.1 P2 - P3
for (var i = start; i < string.length; i++) {
var charType = charTypes[i];
if (charType & (TYPE_R | TYPE_AL)) {
return 1
}
if ((charType & (TYPE_B | TYPE_L)) || (isFSI && charType === TYPE_PDI)) {
return 0
}
if (charType & ISOLATE_INIT_TYPES) {
var pdi = indexOfMatchingPDI(i);
i = pdi === -1 ? string.length : pdi;
}
}
return 0
}
function indexOfMatchingPDI (isolateStart) {
// 3.1.2 BD9
var isolationLevel = 1;
for (var i = isolateStart + 1; i < string.length; i++) {
var charType = charTypes[i];
if (charType & TYPE_B) {
break
}
if (charType & TYPE_PDI) {
if (--isolationLevel === 0) {
return i
}
} else if (charType & ISOLATE_INIT_TYPES) {
isolationLevel++;
}
}
return -1
}
}
// Bidi mirrored chars data, auto generated
var data = "14>1,j>2,t>2,u>2,1a>g,2v3>1,1>1,1ge>1,1wd>1,b>1,1j>1,f>1,ai>3,-2>3,+1,8>1k0,-1jq>1y7,-1y6>1hf,-1he>1h6,-1h5>1ha,-1h8>1qi,-1pu>1,6>3u,-3s>7,6>1,1>1,f>1,1>1,+2,3>1,1>1,+13,4>1,1>1,6>1eo,-1ee>1,3>1mg,-1me>1mk,-1mj>1mi,-1mg>1mi,-1md>1,1>1,+2,1>10k,-103>1,1>1,4>1,5>1,1>1,+10,3>1,1>8,-7>8,+1,-6>7,+1,a>1,1>1,u>1,u6>1,1>1,+5,26>1,1>1,2>1,2>2,8>1,7>1,4>1,1>1,+5,b8>1,1>1,+3,1>3,-2>1,2>1,1>1,+2,c>1,3>1,1>1,+2,h>1,3>1,a>1,1>1,2>1,3>1,1>1,d>1,f>1,3>1,1a>1,1>1,6>1,7>1,13>1,k>1,1>1,+19,4>1,1>1,+2,2>1,1>1,+18,m>1,a>1,1>1,lk>1,1>1,4>1,2>1,f>1,3>1,1>1,+3,db>1,1>1,+3,3>1,1>1,+2,14qm>1,1>1,+1,6>1,4j>1,j>2,t>2,u>2,2>1,+1";
var mirrorMap;
function parse () {
if (!mirrorMap) {
//const start = performance.now()
var ref = parseCharacterMap(data, true);
var map = ref.map;
var reverseMap = ref.reverseMap;
// Combine both maps into one
reverseMap.forEach(function (value, key) {
map.set(key, value);
});
mirrorMap = map;
//console.log(`mirrored chars parsed in ${performance.now() - start}ms`)
}
}
function getMirroredCharacter (char) {
parse();
return mirrorMap.get(char) || null
}
/**
* Given a string and its resolved embedding levels, build a map of indices to replacement chars
* for any characters in right-to-left segments that have defined mirrored characters.
* @param string
* @param embeddingLevels
* @param [start]
* @param [end]
* @return {Map<number, string>}
*/
function getMirroredCharactersMap(string, embeddingLevels, start, end) {
var strLen = string.length;
start = Math.max(0, start == null ? 0 : +start);
end = Math.min(strLen - 1, end == null ? strLen - 1 : +end);
var map = new Map();
for (var i = start; i <= end; i++) {
if (embeddingLevels[i] & 1) { //only odd (rtl) levels
var mirror = getMirroredCharacter(string[i]);
if (mirror !== null) {
map.set(i, mirror);
}
}
}
return map
}
/**
* Given a start and end denoting a single line within a string, and a set of precalculated
* bidi embedding levels, produce a list of segments whose ordering should be flipped, in sequence.
* @param {string} string - the full input string
* @param {GetEmbeddingLevelsResult} embeddingLevelsResult - the result object from getEmbeddingLevels
* @param {number} [start] - first character in a subset of the full string
* @param {number} [end] - last character in a subset of the full string
* @return {number[][]} - the list of start/end segments that should be flipped, in order.
*/
function getReorderSegments(string, embeddingLevelsResult, start, end) {
var strLen = string.length;
start = Math.max(0, start == null ? 0 : +start);
end = Math.min(strLen - 1, end == null ? strLen - 1 : +end);
var segments = [];
embeddingLevelsResult.paragraphs.forEach(function (paragraph) {
var lineStart = Math.max(start, paragraph.start);
var lineEnd = Math.min(end, paragraph.end);
if (lineStart < lineEnd) {
// Local slice for mutation
var lineLevels = embeddingLevelsResult.levels.slice(lineStart, lineEnd + 1);
// 3.4 L1.4: Reset any sequence of whitespace characters and/or isolate formatting characters at the
// end of the line to the paragraph level.
for (var i = lineEnd; i >= lineStart && (getBidiCharType(string[i]) & TRAILING_TYPES); i--) {
lineLevels[i] = paragraph.level;
}
// L2. From the highest level found in the text to the lowest odd level on each line, including intermediate levels
// not actually present in the text, reverse any contiguous sequence of characters that are at that level or higher.
var maxLevel = paragraph.level;
var minOddLevel = Infinity;
for (var i$1 = 0; i$1 < lineLevels.length; i$1++) {
var level = lineLevels[i$1];
if (level > maxLevel) { maxLevel = level; }
if (level < minOddLevel) { minOddLevel = level | 1; }
}
for (var lvl = maxLevel; lvl >= minOddLevel; lvl--) {
for (var i$2 = 0; i$2 < lineLevels.length; i$2++) {
if (lineLevels[i$2] >= lvl) {
var segStart = i$2;
while (i$2 + 1 < lineLevels.length && lineLevels[i$2 + 1] >= lvl) {
i$2++;
}
if (i$2 > segStart) {
segments.push([segStart + lineStart, i$2 + lineStart]);
}
}
}
}
}
});
return segments
}
/**
* @param {string} string
* @param {GetEmbeddingLevelsResult} embedLevelsResult
* @param {number} [start]
* @param {number} [end]
* @return {string} the new string with bidi segments reordered
*/
function getReorderedString(string, embedLevelsResult, start, end) {
var indices = getReorderedIndices(string, embedLevelsResult, start, end);
var chars = [].concat( string );
indices.forEach(function (charIndex, i) {
chars[i] = (
(embedLevelsResult.levels[charIndex] & 1) ? getMirroredCharacter(string[charIndex]) : null
) || string[charIndex];
});
return chars.join('')
}
/**
* @param {string} string
* @param {GetEmbeddingLevelsResult} embedLevelsResult
* @param {number} [start]
* @param {number} [end]
* @return {number[]} an array with character indices in their new bidi order
*/
function getReorderedIndices(string, embedLevelsResult, start, end) {
var segments = getReorderSegments(string, embedLevelsResult, start, end);
// Fill an array with indices
var indices = [];
for (var i = 0; i < string.length; i++) {
indices[i] = i;
}
// Reverse each segment in order
segments.forEach(function (ref) {
var start = ref[0];
var end = ref[1];
var slice = indices.slice(start, end + 1);
for (var i = slice.length; i--;) {
indices[end - i] = slice[i];
}
});
return indices
}
exports.closingToOpeningBracket = closingToOpeningBracket;
exports.getBidiCharType = getBidiCharType;
exports.getBidiCharTypeName = getBidiCharTypeName;
exports.getCanonicalBracket = getCanonicalBracket;
exports.getEmbeddingLevels = getEmbeddingLevels;
exports.getMirroredCharacter = getMirroredCharacter;
exports.getMirroredCharactersMap = getMirroredCharactersMap;
exports.getReorderSegments = getReorderSegments;
exports.getReorderedIndices = getReorderedIndices;
exports.getReorderedString = getReorderedString;
exports.openingToClosingBracket = openingToClosingBracket;
Object.defineProperty(exports, '__esModule', { value: true });
return exports;
}({}));
return bidi}
return bidiFactory;
})));
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