Metacat

/*

 * Copyright 2004 ThoughtWorks, Inc

 *

 *  Licensed under the Apache License, Version 2.0 (the "License");

 *  you may not use this file except in compliance with the License.

 *  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 *  Unless required by applicable law or agreed to in writing, software

 *  distributed under the License is distributed on an "AS IS" BASIS,

 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *  See the License for the specific language governing permissions and

 *  limitations under the License.

 *

 */

elementFindMatchingChildren = function(element, selector) {

  var matches = [];

  var childCount = element.childNodes.length;

  for (var i=0; i<childCount; i++) {

    var child = element.childNodes[i];

    if (selector(child)) {

      matches.push(child);

    } else {

      childMatches = elementFindMatchingChildren(child, selector);

      matches.push(childMatches);

    }

  }

  return matches.flatten();

}

ELEMENT_NODE_TYPE = 1;

elementFindFirstMatchingChild = function(element, selector) {

  var childCount = element.childNodes.length;

  for (var i=0; i<childCount; i++) {

    var child = element.childNodes[i];

    if (child.nodeType == ELEMENT_NODE_TYPE) {

      if (selector(child)) {

        return child;

      }

      result = elementFindFirstMatchingChild(child, selector);

      if (result) {

        return result;

      }

    }

  }

  return null;

}

elementFindFirstMatchingParent = function(element, selector) {

  var current = element.parentNode;

  while (current != null) {

    if (selector(current)) {

      break;

    }

    current = current.parentNode;

  }

  return current;

}

elementFindMatchingChildById = function(element, id) {

  return elementFindFirstMatchingChild(element, function(element){return element.id==id} );

}