Function findDuplicateGradient

src/js/svgcanvas.js:6921–6975

(grad)

// Returns:
// The existing gradient if found, null if not
var findDuplicateGradient = function(grad) {
  var defs = findDefs();
  var existing_grads = $(defs).find("linearGradient, radialGradient");
  var i = existing_grads.length;
  var rad_attrs = ['r','cx','cy','fx','fy'];
  while (i--) {
    var og = existing_grads[i];
    if(grad.tagName == "linearGradient") {
      if (grad.getAttribute('x1') != og.getAttribute('x1') ||
        grad.getAttribute('y1') != og.getAttribute('y1') ||
        grad.getAttribute('x2') != og.getAttribute('x2') ||
        grad.getAttribute('y2') != og.getAttribute('y2')) 
      {
        continue;
      }
    } else {
      var grad_attrs = $(grad).attr(rad_attrs);
      var og_attrs = $(og).attr(rad_attrs);
      
      var diff = false;
      $.each(rad_attrs, function(i, attr) {
        if(grad_attrs[attr] != og_attrs[attr]) diff = true;
      });
      
      if(diff) continue;
    }
    
    // else could be a duplicate, iterate through stops
    var stops = grad.getElementsByTagNameNS(svgns, "stop");
    var ostops = og.getElementsByTagNameNS(svgns, "stop");

    if (stops.length != ostops.length) {
      continue;
    }

    var j = stops.length;
    while(j--) {
      var stop = stops[j];
      var ostop = ostops[j];

      if (stop.getAttribute('offset') != ostop.getAttribute('offset') ||
        stop.getAttribute('stop-opacity') != ostop.getAttribute('stop-opacity') ||
        stop.getAttribute('stop-color') != ostop.getAttribute('stop-color')) 
      {
        break;
      }
    }

    if (j == -1) {
      return og;
    }
  } // for each gradient in defs

  return null;
};

function reorientGrads(elem, m) {
  var bb = svgedit.utilities.getBBox(elem);