Function extractGrowingEdgesData

chapter24/docs/d3-graphviz.js:1113–1185

(datum)

      }
    }
    function extractGrowingEdgesData(datum) {
      var id = datum.id;
      var tag = datum.tag;
      var prevDatum = prevDictionary[id];
      if (growEnteringEdges && !prevDatum && datum.parent) {
        if (isEdgeElement(datum)) {
          if (tag == 'path' || tag == 'polygon') {
            if (tag == 'polygon') {
              var path = datum.parent.children.find(function (e) {
                return e.tag == 'path';
              });
              if (path) {
                datum.totalLength = path.totalLength;
              }
            }
            var title = getEdgeTitle(datum);
            var child = title.children[0];
            var nodeIds = child.text.split('->');
            if (nodeIds.length != 2) {
              nodeIds = child.text.split('--');
            }
            var startNodeId = nodeIds[0];
            var startNode = nodeDictionary[startNodeId];
            if (Object.hasOwn(prevNodeDictionary, startNodeId)) {
              var prevStartNode = prevNodeDictionary[startNodeId];
              var i = startNode.children.findIndex(function (element, index) {
                return element.tag == 'g';
              });
              if (i >= 0) {
                var j = startNode.children[i].children.findIndex(function (element, index) {
                  return element.tag == 'a';
                });
                startNode = startNode.children[i].children[j];
              }
              var i = prevStartNode.children.findIndex(function (element, index) {
                return element.tag == 'g';
              });
              if (i >= 0) {
                var j = prevStartNode.children[i].children.findIndex(function (element, index) {
                  return element.tag == 'a';
                });
                prevStartNode = prevStartNode.children[i].children[j];
              }
              var startShapes = startNode.children;
              for (var i = 0; i < startShapes.length; i++) {
                if (startShapes[i].tag == 'polygon' || startShapes[i].tag == 'ellipse' || startShapes[i].tag == 'path' || startShapes[i].tag == 'text') {
                  var startShape = startShapes[i];
                  break;
                }
              }
              var prevStartShapes = prevStartNode.children;
              for (var i = 0; i < prevStartShapes.length; i++) {
                if (prevStartShapes[i].tag == 'polygon' || prevStartShapes[i].tag == 'ellipse' || prevStartShapes[i].tag == 'path' || prevStartShapes[i].tag == 'text') {
                  var prevStartShape = prevStartShapes[i];
                  break;
                }
              }
              if (prevStartShape && startShape) {