@sendbird/uikit-utils/lib/module/shared/rtl.js

A collection of utility functions and constants for building chat UI components with Sendbird UIKit.

const isRTLString = (dir, str) => {
  if (!str || str.length === 0) {
    return false;
  }
  const trimmedStr = str.trimStart();
  if (trimmedStr.length === 0) {
    return false;
  }
  const char = dir === 'start' ? Array.from(trimmedStr)[0] : Array.from(trimmedStr).pop();
  const point = char === null || char === void 0 ? void 0 : char.codePointAt(0);
  if (point === undefined) {
    return false;
  }
  return isRTLCodePoint(point);
};
export const isStartsWithRTL = str => {
  return isRTLString('start', str);
};
export const isEndsWithRTL = str => {
  return isRTLString('end', str);
};
const isRTLCodePoint = codePoint => {
  for (const [start, end] of rtlCodePointRanges) {
    if (codePoint >= start && codePoint <= end) {
      return true;
    }
  }
  return false;
};
const rtlCodePointRanges = [[0x0590, 0x05ff],
// Hebrew
[0x0600, 0x06ff],
// Arabic
[0x0750, 0x077f],
// Arabic Supplement
[0x08a0, 0x08ff],
// Hebrew Supplement
[0xfb1d, 0xfb4f],
// Hebrew Presentation Forms
[0xfe70, 0xfeff],
// Arabic Presentation Forms-B
[0x1ee00, 0x1eeff] // Arabic Mathematical Alphabetic Symbols
];
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