@pie-lib/text-select/lib/tokenizer/selection-utils.js

Some react components for text selection

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getCaretCharacterOffsetWithin = exports.clearSelection = void 0;

var clearSelection = function clearSelection() {
  if (document.getSelection) {
    // for all new browsers (IE9+, Chrome, Firefox)
    document.getSelection().removeAllRanges();
    document.getSelection().addRange(document.createRange());
  } else if (window.getSelection) {
    // equals with the document.getSelection (MSDN info)
    if (window.getSelection().removeAllRanges) {
      // for all new browsers (IE9+, Chrome, Firefox)
      window.getSelection().removeAllRanges();
      window.getSelection().addRange(document.createRange());
    } else if (window.getSelection().empty) {
      // Chrome supports this as well
      window.getSelection().empty();
    }
  } else if (document.selection) {
    // IE8-
    document.selection.empty();
  }
};

exports.clearSelection = clearSelection;

var getCaretCharacterOffsetWithin = function getCaretCharacterOffsetWithin(element) {
  var caretOffset = 0;
  var doc = element.ownerDocument || element.document;
  var win = doc.defaultView || doc.parentWindow;
  var sel;

  if (typeof win.getSelection !== 'undefined') {
    sel = win.getSelection();

    if (sel.rangeCount > 0) {
      var range = win.getSelection().getRangeAt(0);
      var selected = range.toString().length;
      var preCaretRange = range.cloneRange();
      preCaretRange.selectNodeContents(element);
      preCaretRange.setEnd(range.endContainer, range.endOffset);

      if (selected) {
        caretOffset = preCaretRange.toString().length - selected;
      } else {
        caretOffset = preCaretRange.toString().length;
      }
    }
  } else if ((sel = doc.selection) && sel.type !== 'Control') {
    var textRange = sel.createRange();
    var preCaretTextRange = doc.body.createTextRange();
    preCaretTextRange.moveToElementText(element);
    preCaretTextRange.setEndPoint('EndToEnd', textRange);
    caretOffset = preCaretTextRange.text.length;
  }

  return caretOffset;
};

exports.getCaretCharacterOffsetWithin = getCaretCharacterOffsetWithin;
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