Function _addComplexStringPropTween

esm/gsap-core.js:2705–2774

(target, prop, start, end, setter, stringFilter, funcParam)

});

var _addComplexStringPropTween = function _addComplexStringPropTween(target, prop, start, end, setter, stringFilter, funcParam) {
  //note: we call _addComplexStringPropTween.call(tweenInstance...) to ensure that it's scoped properly. We may call it from within a plugin too, thus "this" would refer to the plugin.
  var pt = new PropTween(this._pt, target, prop, 0, 1, _renderComplexString, null, setter),
      index = 0,
      matchIndex = 0,
      result,
      startNums,
      color,
      endNum,
      chunk,
      startNum,
      hasRandom,
      a;
  pt.b = start;
  pt.e = end;
  start += ""; //ensure values are strings

  end += "";

  if (hasRandom = ~end.indexOf("random(")) {
    end = _replaceRandom(end);
  }

  if (stringFilter) {
    a = [start, end];
    stringFilter(a, target, prop); //pass an array with the starting and ending values and let the filter do whatever it needs to the values.

    start = a[0];
    end = a[1];
  }

  startNums = start.match(_complexStringNumExp) || [];

  while (result = _complexStringNumExp.exec(end)) {
    endNum = result[0];
    chunk = end.substring(index, result.index);

    if (color) {
      color = (color + 1) % 5;
    } else if (chunk.substr(-5) === "rgba(") {
      color = 1;
    }

    if (endNum !== startNums[matchIndex++]) {
      startNum = parseFloat(startNums[matchIndex - 1]) || 0; //these nested PropTweens are handled in a special way - we'll never actually call a render or setter method on them. We'll just loop through them in the parent complex string PropTween's render method.

      pt._pt = {
        _next: pt._pt,
        p: chunk || matchIndex === 1 ? chunk : ",",
        //note: SVG spec allows omission of comma/space when a negative sign is wedged between two numbers, like 2.5-5.3 instead of 2.5,-5.3 but when tweening, the negative value may switch to positive, so we insert the comma just in case.
        s: startNum,
        c: endNum.charAt(1) === "=" ? _parseRelative(startNum, endNum) - startNum : parseFloat(endNum) - startNum,
        m: color && color < 4 ? Math.round : 0
      };
      index = _complexStringNumExp.lastIndex;
    }
  }