Function collectDirectives

test/angular/1.7/angular.js:9909–10022

* Looks for directives on the given node and adds them to the directive collection which is * sorted. * * @param node Node to search. * @param directives An array to which the directives are added to. This array is sorted before * the function returns. * @param a

(node, directives, attrs, maxPriority, ignoreDirective)

     * @param {number=} maxPriority Max directive priority.
     */
    function collectDirectives(node, directives, attrs, maxPriority, ignoreDirective) {
      var nodeType = node.nodeType,
          attrsMap = attrs.$attr,
          match,
          nodeName,
          className;

      switch (nodeType) {
        case NODE_TYPE_ELEMENT: /* Element */

          nodeName = nodeName_(node);

          // use the node name: <directive>
          addDirective(directives,
              directiveNormalize(nodeName), 'E', maxPriority, ignoreDirective);

          // iterate over the attributes
          for (var attr, name, nName, value, ngPrefixMatch, nAttrs = node.attributes,
                   j = 0, jj = nAttrs && nAttrs.length; j < jj; j++) {
            var attrStartName = false;
            var attrEndName = false;

            var isNgAttr = false, isNgProp = false, isNgEvent = false;
            var multiElementMatch;

            attr = nAttrs[j];
            name = attr.name;
            value = attr.value;

            nName = directiveNormalize(name.toLowerCase());

            // Support ng-attr-*, ng-prop-* and ng-on-*
            if ((ngPrefixMatch = nName.match(NG_PREFIX_BINDING))) {
              isNgAttr = ngPrefixMatch[1] === 'Attr';
              isNgProp = ngPrefixMatch[1] === 'Prop';
              isNgEvent = ngPrefixMatch[1] === 'On';

              // Normalize the non-prefixed name
              name = name.replace(PREFIX_REGEXP, '')
                .toLowerCase()
                .substr(4 + ngPrefixMatch[1].length).replace(/_(.)/g, function(match, letter) {
                  return letter.toUpperCase();
                });

            // Support *-start / *-end multi element directives
            } else if ((multiElementMatch = nName.match(MULTI_ELEMENT_DIR_RE)) && directiveIsMultiElement(multiElementMatch[1])) {
              attrStartName = name;
              attrEndName = name.substr(0, name.length - 5) + 'end';
              name = name.substr(0, name.length - 6);
            }

            if (isNgProp || isNgEvent) {
              attrs[nName] = value;
              attrsMap[nName] = attr.name;

              if (isNgProp) {
                addPropertyDirective(node, directives, nName, name);
              } else {