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Arabic + Latin Bidi labels

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This commit is contained in:
Nick Doiron
2019-12-26 12:53:29 -05:00
parent 96b2b42ba7
commit e2001b02f4
1 changed files with 31 additions and 31 deletions
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62
modules/util/svg_paths_rtl_fix.js
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@@ -3,43 +3,43 @@
import { WordShaper } from 'alif-toolkit';
export var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0780-\u07BF]/;
export var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08FF]/;
export function fixRTLTextForSvg(inputText) {
var ret = '', rtlBuffer = [];
var arabicRegex = /[\u0600-\u06FF]/g;
var arabicMath = /[\u0660-\u066C]+/g;
var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
var thaanaVowel = /[\u07A6-\u07B0]/;
var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/;
if (!arabicRegex.test(inputText)) {
// Hebrew or Thaana RTL script
for (var n = 0; n < inputText.length; n++) {
var c = inputText[n];
if ((thaanaVowel.test(c) || hebrewSign.test(c)) && rtlBuffer.length) {
rtlBuffer[rtlBuffer.length - 1] += c;
} else if (rtlRegex.test(c)) {
rtlBuffer.push(c);
} else if (c === ' ' && rtlBuffer.length) {
// whitespace within RTL text
rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
} else {
// non-RTL character
ret += rtlBuffer.reverse().join('') + c;
rtlBuffer = [];
}
}
ret += rtlBuffer.reverse().join('');
return ret;
} else {
var label = WordShaper(inputText).split('').reverse().join('');
// prevent Arabic numbers from being reversed
var numericSwaps = label.match(arabicMath) || [];
for (var i = 0; i < numericSwaps.length; i++) {
if (numericSwaps[i].length > 1) {
label = label.replace(numericSwaps[i], numericSwaps[i].split('').reverse().join(''));
}
}
return label;
// Arabic word shaping
if (arabicRegex.test(inputText)) {
inputText = WordShaper(inputText);
}
for (var n = 0; n < inputText.length; n++) {
var c = inputText[n];
if (arabicMath.test(c)) {
// Arabic numbers go LTR
ret += c + rtlBuffer.reverse().join('');
rtlBuffer = [];
} else if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
rtlBuffer[rtlBuffer.length - 1] += c;
} else if (rtlRegex.test(c)
// include Arabic presentation forms
|| (c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023)
|| (c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279)) {
rtlBuffer.push(c);
} else if (c === ' ' && rtlBuffer.length) {
// whitespace within RTL text
rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
} else {
// non-RTL character
ret += rtlBuffer.reverse().join('') + c;
rtlBuffer = [];
}
}
ret += rtlBuffer.reverse().join('');
return ret;
}