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: / var / canvas / node_modules / twitter-text / dist / esm /
Filename : convertUnicodeIndices.js
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import "core-js/modules/es6.array.sort";
// Copyright 2018 Twitter, Inc.
// Licensed under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0
export default function (text, entities, indicesInUTF16) {
  if (entities.length == 0) {
    return;
  }

  var charIndex = 0;
  var codePointIndex = 0; // sort entities by start index

  entities.sort(function (a, b) {
    return a.indices[0] - b.indices[0];
  });
  var entityIndex = 0;
  var entity = entities[0];

  while (charIndex < text.length) {
    if (entity.indices[0] == (indicesInUTF16 ? charIndex : codePointIndex)) {
      var len = entity.indices[1] - entity.indices[0];
      entity.indices[0] = indicesInUTF16 ? codePointIndex : charIndex;
      entity.indices[1] = entity.indices[0] + len;
      entityIndex++;

      if (entityIndex == entities.length) {
        // no more entity
        break;
      }

      entity = entities[entityIndex];
    }

    var c = text.charCodeAt(charIndex);

    if (c >= 0xd800 && c <= 0xdbff && charIndex < text.length - 1) {
      // Found high surrogate char
      c = text.charCodeAt(charIndex + 1);

      if (c >= 0xdc00 && c <= 0xdfff) {
        // Found surrogate pair
        charIndex++;
      }
    }

    codePointIndex++;
    charIndex++;
  }
}