choerodon-ui/es/rc-components/editor-mention/utils/getSearchWord.js

An enterprise-class UI design language and React-based implementation

function getWord(text, position) {
  var str = String(text);
  /* eslint no-bitwise:0 */

  var pos = Number(position) >>> 0; // Search for the word's beginning and end.

  var left = str.slice(0, pos + 1).search(/\S+$/);
  var right = str.slice(pos).search(/\s/);

  if (right < 0) {
    return {
      word: str.slice(left),
      begin: left,
      end: str.length
    };
  } // Return the word, using the located bounds to extract it from the string.


  return {
    word: str.slice(left, right + pos),
    begin: left,
    end: right + pos
  };
}

export default function getSearchWord(editorState, selection) {
  var anchorKey = selection.getAnchorKey();
  var anchorOffset = selection.getAnchorOffset() - 1;
  var currentContent = editorState.getCurrentContent();
  var currentBlock = currentContent.getBlockForKey(anchorKey);

  if (currentBlock) {
    var blockText = currentBlock.getText();
    return getWord(blockText, anchorOffset);
  }

  return '';
}
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