/**
 * @license Angular UI Tree v2.1.5
 * (c) 2010-2014. https://github.com/JimLiu/angular-ui-tree
 * License: MIT
 */
(function () {
    'use strict';

    angular.module('ui.tree', [])
      .constant('treeConfig', {
          treeClass: 'angular-ui-tree',
          emptyTreeClass: 'angular-ui-tree-empty',
          hiddenClass: 'angular-ui-tree-hidden',
          nodesClass: 'angular-ui-tree-nodes',
          nodeClass: 'angular-ui-tree-node',
          handleClass: 'angular-ui-tree-handle',
          placeHolderClass: 'angular-ui-tree-placeholder',
          dragClass: 'angular-ui-tree-drag',
          dragThreshold: 3,
          levelThreshold: 30
      });

})();

(function () {
    'use strict';

    angular.module('ui.tree')

     /**
      * @ngdoc service
      * @name ui.tree.service:$helper
      * @requires ng.$document
      * @requires ng.$window
      *
      * @description
      * angular-ui-tree.
      */
      .factory('$uiTreeHelper', ['$document', '$window',
        function ($document, $window) {
            return {

                /**
                 * A hashtable used to storage data of nodes
                 * @type {Object}
                 */
                nodesData: {
                },

                setNodeAttribute: function (scope, attrName, val) {
                    if (!scope.$modelValue) {
                        return null;
                    }
                    var data = this.nodesData[scope.$modelValue.$$hashKey];
                    if (!data) {
                        data = {};
                        this.nodesData[scope.$modelValue.$$hashKey] = data;
                    }
                    data[attrName] = val;
                },

                getNodeAttribute: function (scope, attrName) {
                    if (!scope.$modelValue) {
                        return null;
                    }
                    var data = this.nodesData[scope.$modelValue.$$hashKey];
                    if (data) {
                        return data[attrName];
                    }
                    return null;
                },

                /**
                 * @ngdoc method
                 * @methodOf ui.tree.service:$nodrag
                 * @param  {Object} targetElm angular element
                 * @return {Bool} check if the node can be dragged.
                 */
                nodrag: function (targetElm) {
                    return (typeof targetElm.attr('data-nodrag')) != "undefined";
                },

                /**
                 * get the event object for touchs
                 * @param  {[type]} e [description]
                 * @return {[type]}   [description]
                 */
                eventObj: function (e) {
                    var obj = e;
                    if (e.targetTouches !== undefined) {
                        obj = e.targetTouches.item(0);
                    } else if (e.originalEvent !== undefined && e.originalEvent.targetTouches !== undefined) {
                        obj = e.originalEvent.targetTouches.item(0);
                    }
                    return obj;
                },

                dragInfo: function (node) {
                    return {
                        source: node,
                        sourceInfo: {
                            nodeScope: node,
                            index: node.index(),
                            nodesScope: node.$parentNodesScope
                        },
                        index: node.index(),
                        siblings: node.siblings().slice(0),
                        parent: node.$parentNodesScope,

                        moveTo: function (parent, siblings, index) { // Move the node to a new position
                            this.parent = parent;
                            this.siblings = siblings.slice(0);
                            var i = this.siblings.indexOf(this.source); // If source node is in the target nodes
                            if (i > -1) {
                                this.siblings.splice(i, 1);
                                if (this.source.index() < index) {
                                    index--;
                                }
                            }
                            this.siblings.splice(index, 0, this.source);
                            this.index = index;
                        },

                        parentNode: function () {
                            return this.parent.$nodeScope;
                        },

                        prev: function () {
                            if (this.index > 0) {
                                return this.siblings[this.index - 1];
                            }
                            return null;
                        },

                        next: function () {
                            if (this.index < this.siblings.length - 1) {
                                return this.siblings[this.index + 1];
                            }
                            return null;
                        },

                        isDirty: function () {
                            return this.source.$parentNodesScope != this.parent ||
                                    this.source.index() != this.index;
                        },

                        eventArgs: function (elements, pos) {
                            return {
                                source: this.sourceInfo,
                                dest: {
                                    index: this.index,
                                    nodesScope: this.parent
                                },
                                elements: elements,
                                pos: pos
                            };
                        },

                        apply: function () {
                            var nodeData = this.source.$modelValue;
                            this.source.remove();
                            this.parent.insertNode(this.index, nodeData);
                        }
                    };
                },

                /**
                * @ngdoc method
                * @name hippo.theme#height
                * @methodOf ui.tree.service:$helper
                *
                * @description
                * Get the height of an element.
                *
                * @param {Object} element Angular element.
                * @returns {String} Height
                */
                height: function (element) {
                    return element.prop('scrollHeight');
                },

                /**
                * @ngdoc method
                * @name hippo.theme#width
                * @methodOf ui.tree.service:$helper
                *
                * @description
                * Get the width of an element.
                *
                * @param {Object} element Angular element.
                * @returns {String} Width
                */
                width: function (element) {
                    return element.prop('scrollWidth');
                },

                /**
                * @ngdoc method
                * @name hippo.theme#offset
                * @methodOf ui.nestedSortable.service:$helper
                *
                * @description
                * Get the offset values of an element.
                *
                * @param {Object} element Angular element.
                * @returns {Object} Object with properties width, height, top and left
                */
                offset: function (element) {
                    var boundingClientRect = element[0].getBoundingClientRect();

                    return {
                        width: element.prop('offsetWidth'),
                        height: element.prop('offsetHeight'),
                        top: boundingClientRect.top + ($window.pageYOffset || $document[0].body.scrollTop || $document[0].documentElement.scrollTop),
                        left: boundingClientRect.left + ($window.pageXOffset || $document[0].body.scrollLeft || $document[0].documentElement.scrollLeft)
                    };
                },

                /**
                * @ngdoc method
                * @name hippo.theme#positionStarted
                * @methodOf ui.tree.service:$helper
                *
                * @description
                * Get the start position of the target element according to the provided event properties.
                *
                * @param {Object} e Event
                * @param {Object} target Target element
                * @returns {Object} Object with properties offsetX, offsetY, startX, startY, nowX and dirX.
                */
                positionStarted: function (e, target) {
                    var pos = {};
                    pos.offsetX = e.pageX - this.offset(target).left;
                    pos.offsetY = e.pageY - this.offset(target).top;
                    pos.startX = pos.lastX = e.pageX;
                    pos.startY = pos.lastY = e.pageY;
                    pos.nowX = pos.nowY = pos.distX = pos.distY = pos.dirAx = 0;
                    pos.dirX = pos.dirY = pos.lastDirX = pos.lastDirY = pos.distAxX = pos.distAxY = 0;
                    return pos;
                },

                positionMoved: function (e, pos, firstMoving) {
                    // mouse position last events
                    pos.lastX = pos.nowX;
                    pos.lastY = pos.nowY;

                    // mouse position this events
                    pos.nowX = e.pageX;
                    pos.nowY = e.pageY;

                    // distance mouse moved between events
                    pos.distX = pos.nowX - pos.lastX;
                    pos.distY = pos.nowY - pos.lastY;

                    // direction mouse was moving
                    pos.lastDirX = pos.dirX;
                    pos.lastDirY = pos.dirY;

                    // direction mouse is now moving (on both axis)
                    pos.dirX = pos.distX === 0 ? 0 : pos.distX > 0 ? 1 : -1;
                    pos.dirY = pos.distY === 0 ? 0 : pos.distY > 0 ? 1 : -1;

                    // axis mouse is now moving on
                    var newAx = Math.abs(pos.distX) > Math.abs(pos.distY) ? 1 : 0;

                    // do nothing on first move
                    if (firstMoving) {
                        pos.dirAx = newAx;
                        pos.moving = true;
                        return;
                    }

                    // calc distance moved on this axis (and direction)
                    if (pos.dirAx !== newAx) {
                        pos.distAxX = 0;
                        pos.distAxY = 0;
                    } else {
                        pos.distAxX += Math.abs(pos.distX);
                        if (pos.dirX !== 0 && pos.dirX !== pos.lastDirX) {
                            pos.distAxX = 0;
                        }

                        pos.distAxY += Math.abs(pos.distY);
                        if (pos.dirY !== 0 && pos.dirY !== pos.lastDirY) {
                            pos.distAxY = 0;
                        }
                    }

                    pos.dirAx = newAx;
                }
            };
        }
      ]);

})();
(function () {
    'use strict';

    angular.module('ui.tree')

      .controller('TreeController', ['$scope', '$element', '$attrs', 'treeConfig',
        function ($scope, $element, $attrs, treeConfig) {
            this.scope = $scope;

            $scope.$element = $element;
            $scope.$nodesScope = null; // root nodes
            $scope.$type = 'uiTree';
            $scope.$emptyElm = null;
            $scope.$callbacks = null;

            $scope.dragEnabled = true;
            $scope.emptyPlaceHolderEnabled = true;
            $scope.maxDepth = 0;
            $scope.dragDelay = 0;

            // Check if it's a empty tree
            $scope.isEmpty = function () {
                return ($scope.$nodesScope && $scope.$nodesScope.$modelValue
                  && $scope.$nodesScope.$modelValue.length === 0);
            };

            // add placeholder to empty tree
            $scope.place = function (placeElm) {
                $scope.$nodesScope.$element.append(placeElm);
                $scope.$emptyElm.remove();
            };

            $scope.resetEmptyElement = function () {
                if ($scope.$nodesScope.$modelValue.length === 0 &&
                  $scope.emptyPlaceHolderEnabled) {
                    $element.append($scope.$emptyElm);
                } else {
                    $scope.$emptyElm.remove();
                }
            };

            var collapseOrExpand = function (scope, collapsed) {
                var nodes = scope.childNodes();
                for (var i = 0; i < nodes.length; i++) {
                    collapsed ? nodes[i].collapse() : nodes[i].expand();
                    var subScope = nodes[i].$childNodesScope;
                    if (subScope) {
                        collapseOrExpand(subScope, collapsed);
                    }
                }
            };

            $scope.collapseAll = function () {
                collapseOrExpand($scope.$nodesScope, true);
            };

            $scope.expandAll = function () {
                collapseOrExpand($scope.$nodesScope, false);
            };

        }
      ]);
})();

(function () {
    'use strict';

    angular.module('ui.tree')

      .controller('TreeNodesController', ['$scope', '$element', 'treeConfig',
        function ($scope, $element, treeConfig) {
            this.scope = $scope;

            $scope.$element = $element;
            $scope.$modelValue = null;
            $scope.$nodeScope = null; // the scope of node which the nodes belongs to
            $scope.$treeScope = null;
            $scope.$type = 'uiTreeNodes';
            $scope.$nodesMap = {};

            $scope.nodrop = false;
            $scope.maxDepth = 0;

            $scope.initSubNode = function (subNode) {
                if (!subNode.$modelValue) {
                    return null;
                }
                $scope.$nodesMap[subNode.$modelValue.$$hashKey] = subNode;
            };

            $scope.destroySubNode = function (subNode) {
                if (!subNode.$modelValue) {
                    return null;
                }
                $scope.$nodesMap[subNode.$modelValue.$$hashKey] = null;
            };

            $scope.accept = function (sourceNode, destIndex) {
                return $scope.$treeScope.$callbacks.accept(sourceNode, $scope, destIndex);
            };

            $scope.beforeDrag = function (sourceNode) {
                return $scope.$treeScope.$callbacks.beforeDrag(sourceNode);
            };

            $scope.isParent = function (node) {
                return node.$parentNodesScope == $scope;
            };

            $scope.hasChild = function () {
                return $scope.$modelValue.length > 0;
            };

            $scope.safeApply = function (fn) {
                var phase = this.$root.$$phase;
                if (phase == '$apply' || phase == '$digest') {
                    if (fn && (typeof (fn) === 'function')) {
                        fn();
                    }
                } else {
                    this.$apply(fn);
                }
            };

            // $scope.removeNode = function (node) {
            //     var index = $scope.$modelValue.indexOf(node.$modelValue);
            //     if (index > -1) {
            //         $scope.safeApply(function () {
            //             $scope.$modelValue.splice(index, 1)[0];
            //         });
            //         return node;
            //     }
            //     return null;
            // };

            $scope.insertNode = function (index, nodeData) {
                $scope.safeApply(function () {
                    $scope.$modelValue.splice(index, 0, nodeData);
                });
            };

            $scope.childNodes = function () {
                var nodes = [];
                if ($scope.$modelValue) {
                    for (var i = 0; i < $scope.$modelValue.length; i++) {
                        nodes.push($scope.$nodesMap[$scope.$modelValue[i].$$hashKey]);
                    }
                }
                return nodes;
            };

            $scope.depth = function () {
                if ($scope.$nodeScope) {
                    return $scope.$nodeScope.depth();
                }
                return 0; // if it has no $nodeScope, it's root
            };

            // check if depth limit has reached
            $scope.outOfDepth = function (sourceNode) {
                var maxDepth = $scope.maxDepth || $scope.$treeScope.maxDepth;
                if (maxDepth > 0) {
                    return $scope.depth() + sourceNode.maxSubDepth() + 1 > maxDepth;
                }
                return false;
            };

        }
      ]);
})();
(function () {
    'use strict';

    angular.module('ui.tree')

      .controller('TreeNodeController', ['$scope', '$element', '$attrs', 'treeConfig',
        function ($scope, $element, $attrs, treeConfig) {
            this.scope = $scope;

            $scope.$element = $element;
            $scope.$modelValue = null; // Model value for node;
            $scope.$parentNodeScope = null; // uiTreeNode Scope of parent node;
            $scope.$childNodesScope = null; // uiTreeNodes Scope of child nodes.
            $scope.$parentNodesScope = null; // uiTreeNodes Scope of parent nodes.
            $scope.$treeScope = null; // uiTree scope
            $scope.$handleScope = null; // it's handle scope
            $scope.$type = 'uiTreeNode';
            $scope.$$apply = false; //

            $scope.collapsed = false;

            $scope.init = function (controllersArr) {
                var treeNodesCtrl = controllersArr[0];
                $scope.$treeScope = controllersArr[1] ? controllersArr[1].scope : null;

                // find the scope of it's parent node
                $scope.$parentNodeScope = treeNodesCtrl.scope.$nodeScope;
                // modelValue for current node
                $scope.$modelValue = treeNodesCtrl.scope.$modelValue[$scope.$index];
                $scope.$parentNodesScope = treeNodesCtrl.scope;
                treeNodesCtrl.scope.initSubNode($scope); // init sub nodes

                $element.on('$destroy', function () {
                    treeNodesCtrl.scope.destroySubNode($scope); // destroy sub nodes
                });
            };

            $scope.index = function () {
                return $scope.$parentNodesScope.$modelValue.indexOf($scope.$modelValue);
            };

            $scope.dragEnabled = function () {
                return !($scope.$treeScope && !$scope.$treeScope.dragEnabled);
            };

            $scope.isSibling = function (targetNode) {
                return $scope.$parentNodesScope == targetNode.$parentNodesScope;
            };

            $scope.isChild = function (targetNode) {
                var nodes = $scope.childNodes();
                return nodes && nodes.indexOf(targetNode) > -1;
            };

            $scope.prev = function () {
                var index = $scope.index();
                if (index > 0) {
                    return $scope.siblings()[index - 1];
                }
                return null;
            };

            $scope.siblings = function () {
                return $scope.$parentNodesScope.childNodes();
            };

            $scope.childNodesCount = function () {
                return $scope.childNodes() ? $scope.childNodes().length : 0;
            };

            $scope.hasChild = function () {
                return $scope.childNodesCount() > 0;
            };

            $scope.childNodes = function () {
                return $scope.$childNodesScope && $scope.$childNodesScope.$modelValue ?
                    $scope.$childNodesScope.childNodes() :
                    null;
            };

            $scope.accept = function (sourceNode, destIndex) {
                return $scope.$childNodesScope &&
                        $scope.$childNodesScope.$modelValue &&
                        $scope.$childNodesScope.accept(sourceNode, destIndex);
            };

            // $scope.removeNode = function () {
            //     var node = $scope.remove();
            //     $scope.$callbacks.removed(node);
            //     return node;
            // };

            // $scope.remove = function () {
            //     return $scope.$parentNodesScope.removeNode($scope);
            // };

            $scope.toggle = function () {
               
                $scope.collapsed = !$scope.collapsed;
            };

            $scope.collapse = function () {
                $scope.collapsed = true;
            };

            $scope.expand = function () {
                $scope.collapsed = false;
            };

            $scope.depth = function () {
                var parentNode = $scope.$parentNodeScope;
                if (parentNode) {
                    return parentNode.depth() + 1;
                }
                return 1;
            };

            var subDepth = 0;
            var countSubDepth = function (scope) {
                var count = 0;
                var nodes = scope.childNodes();
                for (var i = 0; i < nodes.length; i++) {
                    var childNodes = nodes[i].$childNodesScope;
                    if (childNodes) {
                        count = 1;
                        countSubDepth(childNodes);
                    }
                }
                subDepth += count;
            };

            $scope.maxSubDepth = function () {
                subDepth = 0;
                if ($scope.$childNodesScope) {
                    countSubDepth($scope.$childNodesScope);
                }
                return subDepth;
            };

        }
      ]);
})();

(function () {
    'use strict';

    angular.module('ui.tree')

      .controller('TreeHandleController', ['$scope', '$element', '$attrs', 'treeConfig',
        function ($scope, $element, $attrs, treeConfig) {
            this.scope = $scope;

            $scope.$element = $element;
            $scope.$nodeScope = null;
            $scope.$type = 'uiTreeHandle';

        }
      ]);
})();

(function () {
    'use strict';

    angular.module('ui.tree')
    .directive('uiTree', ['treeConfig', '$window',
      function (treeConfig, $window) {
          return {
              restrict: 'A',
              scope: true,
              controller: 'TreeController',
              link: function (scope, element, attrs) {
                  var callbacks = {
                      accept: null,
                      beforeDrag: null
                  };

                  var config = {};
                  angular.extend(config, treeConfig);
                  if (config.treeClass) {
                      element.addClass(config.treeClass);
                  }

                  scope.$emptyElm = angular.element($window.document.createElement('div'));
                  if (config.emptyTreeClass) {
                      scope.$emptyElm.addClass(config.emptyTreeClass);
                  }

                  scope.$watch('$nodesScope.$modelValue.length', function () {
                      if (scope.$nodesScope.$modelValue) {
                          scope.resetEmptyElement();
                      }
                  }, true);

                  scope.$watch(attrs.dragEnabled, function (val) {
                      if ((typeof val) == "boolean") {
                          scope.dragEnabled = val;
                      }
                  });

                  scope.$watch(attrs.emptyPlaceHolderEnabled, function (val) {
                      if ((typeof val) == "boolean") {
                          scope.emptyPlaceHolderEnabled = val;
                      }
                  });

                  scope.$watch(attrs.maxDepth, function (val) {
                      if ((typeof val) == "number") {
                          scope.maxDepth = val;
                      }
                  });

                  scope.$watch(attrs.dragDelay, function (val) {
                      if ((typeof val) == "number") {
                          scope.dragDelay = val;
                      }
                  });

                  // check if the dest node can accept the dragging node
                  // by default, we check the 'data-nodrop' attribute in `ui-tree-nodes`
                  // and the 'max-depth' attribute in `ui-tree` or `ui-tree-nodes`.
                  // the method can be overrided
                  callbacks.accept = function (sourceNodeScope, destNodesScope, destIndex) {
                      if (destNodesScope.nodrop || destNodesScope.outOfDepth(sourceNodeScope)) {
                          return false;
                      }
                      return true;
                  };

                  callbacks.beforeDrag = function (sourceNodeScope) {
                      return true;
                  };

                  callbacks.removed = function (node) {

                  };

                  callbacks.dropped = function (event) {

                  };

                  //
                  callbacks.dragStart = function (event) {

                  };

                  callbacks.dragMove = function (event) {

                  };

                  callbacks.dragStop = function (event) {

                  };

                  callbacks.beforeDrop = function (event) {

                  };

                  scope.$watch(attrs.uiTree, function (newVal, oldVal) {
                      angular.forEach(newVal, function (value, key) {
                          if (callbacks[key]) {
                              if (typeof value === "function") {
                                  callbacks[key] = value;
                              }
                          }
                      });

                      scope.$callbacks = callbacks;
                  }, true);


              }
          };
      }
    ]);
})();

(function () {
    'use strict';

    angular.module('ui.tree')
    .directive('uiTreeNodes', ['treeConfig', '$window',
      function (treeConfig) {
          return {
              require: ['ngModel', '?^uiTreeNode', '^uiTree'],
              restrict: 'A',
              scope: true,
              controller: 'TreeNodesController',
              link: function (scope, element, attrs, controllersArr) {

                  var config = {};
                  angular.extend(config, treeConfig);
                  if (config.nodesClass) {
                      element.addClass(config.nodesClass);
                  }

                  var ngModel = controllersArr[0];
                  var treeNodeCtrl = controllersArr[1];
                  var treeCtrl = controllersArr[2];
                  if (treeNodeCtrl) {
                      treeNodeCtrl.scope.$childNodesScope = scope;
                      scope.$nodeScope = treeNodeCtrl.scope;
                  }
                  else { // find the root nodes if there is no parent node and have a parent ui-tree
                      treeCtrl.scope.$nodesScope = scope;
                  }
                  scope.$treeScope = treeCtrl.scope;

                  if (ngModel) {
                      ngModel.$render = function () {
                          if (!ngModel.$modelValue || !angular.isArray(ngModel.$modelValue)) {
                              scope.$modelValue = [];
                          }
                          scope.$modelValue = ngModel.$modelValue;
                      };
                  }

                  scope.$watch(attrs.maxDepth, function (val) {
                      if ((typeof val) == "number") {
                          scope.maxDepth = val;
                      }
                  });

                  scope.$watch(function () {
                      return attrs.nodrop;
                  }, function (newVal) {
                      if ((typeof newVal) != "undefined") {
                          scope.nodrop = true;
                      }
                  }, true);

                  attrs.$observe('horizontal', function (val) {
                      scope.horizontal = ((typeof val) != "undefined");
                  });

              }
          };
      }
    ]);
})();

(function () {
    'use strict';

    angular.module('ui.tree')

      .directive('uiTreeNode', ['treeConfig', '$uiTreeHelper', '$window', '$document', '$timeout',
        function (treeConfig, $uiTreeHelper, $window, $document, $timeout) {
            return {
                require: ['^uiTreeNodes', '^uiTree'],
                restrict: 'A',
                controller: 'TreeNodeController',
                link: function (scope, element, attrs, controllersArr) {
                    var config = {};
                    angular.extend(config, treeConfig);
                    if (config.nodeClass) {
                        element.addClass(config.nodeClass);
                    }
                    scope.init(controllersArr);

                    scope.collapsed = !!$uiTreeHelper.getNodeAttribute(scope, 'collapsed');

                    scope.$watch(attrs.collapsed, function (val) {
                        if ((typeof val) == "boolean") {
                            scope.collapsed = val;
                        }
                    });

                    scope.$watch('collapsed', function (val) {
                        $uiTreeHelper.setNodeAttribute(scope, 'collapsed', val);
                        attrs.$set('collapsed', val);
                    });

                    var hasTouch = 'ontouchstart' in window;
                    // todo startPos is unused
                    var startPos, firstMoving, dragInfo, pos;
                    var placeElm, hiddenPlaceElm, dragElm;
                    var treeScope = null;
                    var elements; // As a parameter for callbacks
                    var dragDelaying = true;
                    var dragStarted = false;
                    var dragTimer = null;
                    var body = document.body,
                        html = document.documentElement,
                        document_height,
                        document_width;

                    var dragStart = function (e) {
                        if (!hasTouch && (e.button == 2 || e.which == 3)) {
                            // disable right click
                            return;
                        }
                        if (e.uiTreeDragging || (e.originalEvent && e.originalEvent.uiTreeDragging)) { // event has already fired in other scope.
                            return;
                        }

                        // the element which is clicked.
                        var eventElm = angular.element(e.target);
                        var eventScope = eventElm.scope();
                        if (!eventScope || !eventScope.$type) {
                            return;
                        }
                        if (eventScope.$type != 'uiTreeNode'
                          && eventScope.$type != 'uiTreeHandle') { // Check if it is a node or a handle
                            return;
                        }
                        if (eventScope.$type == 'uiTreeNode'
                          && eventScope.$handleScope) { // If the node has a handle, then it should be clicked by the handle
                            return;
                        }

                        var eventElmTagName = eventElm.prop('tagName').toLowerCase();
                        if (eventElmTagName == 'input' ||
                          eventElmTagName == 'textarea' ||
                          eventElmTagName == 'button' ||
                          eventElmTagName == 'select') { // if it's a input or button, ignore it
                            return;
                        }

                        // check if it or it's parents has a 'data-nodrag' attribute
                        while (eventElm && eventElm[0] && eventElm[0] != element) {
                            if ($uiTreeHelper.nodrag(eventElm)) { // if the node mark as `nodrag`, DONOT drag it.
                                return;
                            }
                            eventElm = eventElm.parent();
                        }

                        if (!scope.beforeDrag(scope)) {
                            return;
                        }

                        e.uiTreeDragging = true; // stop event bubbling
                        if (e.originalEvent) {
                            e.originalEvent.uiTreeDragging = true;
                        }
                        e.preventDefault();
                        var eventObj = $uiTreeHelper.eventObj(e);

                        firstMoving = true;
                        dragInfo = $uiTreeHelper.dragInfo(scope);

                        var tagName = scope.$element.prop('tagName');
                        if (tagName.toLowerCase() === 'tr') {
                            placeElm = angular.element($window.document.createElement(tagName));
                            var tdElm = angular.element($window.document.createElement('td'))
                                          .addClass(config.placeHolderClass);
                            placeElm.append(tdElm);
                        } else {
                            placeElm = angular.element($window.document.createElement(tagName))
                                          .addClass(config.placeHolderClass);
                        }
                        hiddenPlaceElm = angular.element($window.document.createElement(tagName));
                        if (config.hiddenClass) {
                            hiddenPlaceElm.addClass(config.hiddenClass);
                        }
                        pos = $uiTreeHelper.positionStarted(eventObj, scope.$element);
                        placeElm.css('height', $uiTreeHelper.height(scope.$element) + 'px');
                        placeElm.css('width', $uiTreeHelper.width(scope.$element) + 'px');
                        dragElm = angular.element($window.document.createElement(scope.$parentNodesScope.$element.prop('tagName')))
                                  .addClass(scope.$parentNodesScope.$element.attr('class')).addClass(config.dragClass);
                        dragElm.css('width', $uiTreeHelper.width(scope.$element) + 'px');
                        dragElm.css('z-index', 9999);

                        // Prevents cursor to change rapidly in Opera 12.16 and IE when dragging an element
                        var hStyle = (scope.$element[0].querySelector('.angular-ui-tree-handle') || scope.$element[0]).currentStyle;
                        if (hStyle) {
                            document.body.setAttribute('ui-tree-cursor', $document.find('body').css('cursor') || '');
                            $document.find('body').css({ 'cursor': hStyle.cursor + '!important' });
                        }

                        scope.$element.after(placeElm);
                        scope.$element.after(hiddenPlaceElm);
                        dragElm.append(scope.$element);
                        $document.find('body').append(dragElm);
                        dragElm.css({
                            'left': eventObj.pageX - pos.offsetX + 'px',
                            'top': eventObj.pageY - pos.offsetY + 'px'
                        });
                        elements = {
                            placeholder: placeElm,
                            dragging: dragElm
                        };

                        angular.element($document).bind('touchend', dragEndEvent);
                        angular.element($document).bind('touchcancel', dragEndEvent);
                        angular.element($document).bind('touchmove', dragMoveEvent);
                        angular.element($document).bind('mouseup', dragEndEvent);
                        angular.element($document).bind('mousemove', dragMoveEvent);
                        angular.element($document).bind('mouseleave', dragCancelEvent);

                        document_height = Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight);
                        document_width = Math.max(body.scrollWidth, body.offsetWidth, html.clientWidth, html.scrollWidth, html.offsetWidth);
                    };

                    var dragMove = function (e) {
                        if (!dragStarted) {
                            if (!dragDelaying) {
                                dragStarted = true;
                                scope.$apply(function () {
                                    scope.$callbacks.dragStart(dragInfo.eventArgs(elements, pos));
                                });
                            }
                            return;
                        }

                        var eventObj = $uiTreeHelper.eventObj(e);
                        var prev, leftElmPos, topElmPos;

                        if (dragElm) {
                            e.preventDefault();

                            if ($window.getSelection) {
                                $window.getSelection().removeAllRanges();
                            } else if ($window.document.selection) {
                                $window.document.selection.empty();
                            }

                            leftElmPos = eventObj.pageX - pos.offsetX;
                            topElmPos = eventObj.pageY - pos.offsetY;

                            //dragElm can't leave the screen on the left
                            if (leftElmPos < 0) {
                                leftElmPos = 0;
                            }

                            //dragElm can't leave the screen on the top
                            if (topElmPos < 0) {
                                topElmPos = 0;
                            }

                            //dragElm can't leave the screen on the bottom
                            if ((topElmPos + 10) > document_height) {
                                topElmPos = document_height - 10;
                            }

                            //dragElm can't leave the screen on the right
                            if ((leftElmPos + 10) > document_width) {
                                leftElmPos = document_width - 10;
                            }

                            dragElm.css({
                                'left': leftElmPos + 'px',
                                'top': topElmPos + 'px'
                            });

                            var top_scroll = window.pageYOffset || $window.document.documentElement.scrollTop;
                            var bottom_scroll = top_scroll + (window.innerHeight || $window.document.clientHeight || $window.document.clientHeight);

                            // to scroll down if cursor y-position is greater than the bottom position the vertical scroll
                            if (bottom_scroll < eventObj.pageY && bottom_scroll <= document_height) {
                                window.scrollBy(0, 10);
                            }

                            // to scroll top if cursor y-position is less than the top position the vertical scroll
                            if (top_scroll > eventObj.pageY) {
                                window.scrollBy(0, -10);
                            }

                            $uiTreeHelper.positionMoved(e, pos, firstMoving);
                            if (firstMoving) {
                                firstMoving = false;
                                return;
                            }

                            // move horizontal
                            if (pos.dirAx && pos.distAxX >= config.levelThreshold) {
                                pos.distAxX = 0;

                                // increase horizontal level if previous sibling exists and is not collapsed
                                if (pos.distX > 0) {
                                    prev = dragInfo.prev();
                                    if (prev && !prev.collapsed
                                      && prev.accept(scope, prev.childNodesCount())) {
                                        prev.$childNodesScope.$element.append(placeElm);
                                        dragInfo.moveTo(prev.$childNodesScope, prev.childNodes(), prev.childNodesCount());
                                    }
                                }

                                // decrease horizontal level
                                if (pos.distX < 0) {
                                    // we can't decrease a level if an item preceeds the current one
                                    var next = dragInfo.next();
                                    if (!next) {
                                        var target = dragInfo.parentNode(); // As a sibling of it's parent node
                                        if (target
                                          && target.$parentNodesScope.accept(scope, target.index() + 1)) {
                                            target.$element.after(placeElm);
                                            dragInfo.moveTo(target.$parentNodesScope, target.siblings(), target.index() + 1);
                                        }
                                    }
                                }
                            }

                            // check if add it as a child node first
                            // todo decrease is unused
                            var decrease = ($uiTreeHelper.offset(dragElm).left - $uiTreeHelper.offset(placeElm).left) >= config.threshold;
                            var targetX = eventObj.pageX - $window.document.body.scrollLeft;
                            var targetY = eventObj.pageY - (window.pageYOffset || $window.document.documentElement.scrollTop);

                            // Select the drag target. Because IE does not support CSS 'pointer-events: none', it will always
                            // pick the drag element itself as the target. To prevent this, we hide the drag element while
                            // selecting the target.
                            var displayElm;
                            if (angular.isFunction(dragElm.hide)) {
                                dragElm.hide();
                            } else {
                                displayElm = dragElm[0].style.display;
                                dragElm[0].style.display = "none";
                            }

                            // when using elementFromPoint() inside an iframe, you have to call
                            // elementFromPoint() twice to make sure IE8 returns the correct value
                            $window.document.elementFromPoint(targetX, targetY);

                            var targetElm = angular.element($window.document.elementFromPoint(targetX, targetY));
                            if (angular.isFunction(dragElm.show)) {
                                dragElm.show();
                            } else {
                                dragElm[0].style.display = displayElm;
                            }

                            // move vertical
                            if (!pos.dirAx) {
                                var targetBefore, targetNode;
                                // check it's new position
                                targetNode = targetElm.scope();
                                var isEmpty = false;
                                if (!targetNode) {
                                    return;
                                }
                                if (targetNode.$type == 'uiTree' && targetNode.dragEnabled) {
                                    isEmpty = targetNode.isEmpty(); // Check if it's empty tree
                                }
                                if (targetNode.$type == 'uiTreeHandle') {
                                    targetNode = targetNode.$nodeScope;
                                }
                                if (targetNode.$type != 'uiTreeNode'
                                  && !isEmpty) { // Check if it is a uiTreeNode or it's an empty tree
                                    return;
                                }

                                // if placeholder move from empty tree, reset it.
                                if (treeScope && placeElm.parent()[0] != treeScope.$element[0]) {
                                    treeScope.resetEmptyElement();
                                    treeScope = null;
                                }

                                if (isEmpty) { // it's an empty tree
                                    treeScope = targetNode;
                                    if (targetNode.$nodesScope.accept(scope, 0)) {
                                        targetNode.place(placeElm);
                                        dragInfo.moveTo(targetNode.$nodesScope, targetNode.$nodesScope.childNodes(), 0);
                                    }
                                } else if (targetNode.dragEnabled()) { // drag enabled
                                    targetElm = targetNode.$element; // Get the element of ui-tree-node
                                    var targetOffset = $uiTreeHelper.offset(targetElm);
                                    targetBefore = targetNode.horizontal ? eventObj.pageX < (targetOffset.left + $uiTreeHelper.width(targetElm) / 2)
                                                                         : eventObj.pageY < (targetOffset.top + $uiTreeHelper.height(targetElm) / 2);

                                    if (targetNode.$parentNodesScope.accept(scope, targetNode.index())) {
                                        if (targetBefore) {
                                            targetElm[0].parentNode.insertBefore(placeElm[0], targetElm[0]);
                                            dragInfo.moveTo(targetNode.$parentNodesScope, targetNode.siblings(), targetNode.index());
                                        } else {
                                            targetElm.after(placeElm);
                                            dragInfo.moveTo(targetNode.$parentNodesScope, targetNode.siblings(), targetNode.index() + 1);
                                        }
                                    }
                                    else if (!targetBefore && targetNode.accept(scope, targetNode.childNodesCount())) { // we have to check if it can add the dragging node as a child
                                        targetNode.$childNodesScope.$element.append(placeElm);
                                        dragInfo.moveTo(targetNode.$childNodesScope, targetNode.childNodes(), targetNode.childNodesCount());
                                    }
                                }

                            }

                            scope.$apply(function () {
                                scope.$callbacks.dragMove(dragInfo.eventArgs(elements, pos));
                            });
                        }
                    };

                    var dragEnd = function (e) {
                        e.preventDefault();

                        if (dragElm) {
                            scope.$treeScope.$apply(function () {
                                scope.$callbacks.beforeDrop(dragInfo.eventArgs(elements, pos));
                            });
                            // roll back elements changed
                            hiddenPlaceElm.replaceWith(scope.$element);
                            placeElm.remove();

                            dragElm.remove();
                            dragElm = null;
                            if (scope.$$apply) {
                                dragInfo.apply();
                                scope.$treeScope.$apply(function () {
                                    scope.$callbacks.dropped(dragInfo.eventArgs(elements, pos));
                                });
                            } else {
                                bindDrag();
                            }
                            scope.$treeScope.$apply(function () {
                                scope.$callbacks.dragStop(dragInfo.eventArgs(elements, pos));
                            });
                            scope.$$apply = false;
                            dragInfo = null;

                        }

                        // Restore cursor in Opera 12.16 and IE
                        var oldCur = document.body.getAttribute('ui-tree-cursor');
                        if (oldCur !== null) {
                            $document.find('body').css({ 'cursor': oldCur });
                            document.body.removeAttribute('ui-tree-cursor');
                        }

                        angular.element($document).unbind('touchend', dragEndEvent); // Mobile
                        angular.element($document).unbind('touchcancel', dragEndEvent); // Mobile
                        angular.element($document).unbind('touchmove', dragMoveEvent); // Mobile
                        angular.element($document).unbind('mouseup', dragEndEvent);
                        angular.element($document).unbind('mousemove', dragMoveEvent);
                        angular.element($window.document.body).unbind('mouseleave', dragCancelEvent);
                    };

                    var dragStartEvent = function (e) {
                        if (scope.dragEnabled()) {
                            dragStart(e);
                        }
                    };

                    var dragMoveEvent = function (e) {
                        dragMove(e);
                    };

                    var dragEndEvent = function (e) {
                        scope.$$apply = true;
                        dragEnd(e);
                    };

                    var dragCancelEvent = function (e) {
                        dragEnd(e);
                    };

                    var bindDrag = function () {
                        element.bind('touchstart mousedown', function (e) {
                            dragDelaying = true;
                            dragStarted = false;
                            dragStartEvent(e);
                            dragTimer = $timeout(function () { dragDelaying = false; }, scope.dragDelay);
                        });
                        element.bind('touchend touchcancel mouseup', function () { $timeout.cancel(dragTimer); });
                    };
                    bindDrag();

                    angular.element($window.document.body).bind("keydown", function (e) {
                        if (e.keyCode == 27) {
                            scope.$$apply = false;
                            dragEnd(e);
                        }
                    });
                }
            };
        }
      ]);

})();

(function () {
    'use strict';

    angular.module('ui.tree')
    .directive('uiTreeHandle', ['treeConfig', '$window',
      function (treeConfig) {
          return {
              require: '^uiTreeNode',
              restrict: 'A',
              scope: true,
              controller: 'TreeHandleController',
              link: function (scope, element, attrs, treeNodeCtrl) {
                  var config = {};
                  angular.extend(config, treeConfig);
                  if (config.handleClass) {
                      element.addClass(config.handleClass);
                  }
                  // connect with the tree node.
                  if (scope != treeNodeCtrl.scope) {
                      scope.$nodeScope = treeNodeCtrl.scope;
                      treeNodeCtrl.scope.$handleScope = scope;
                  }
              }
          };
      }
    ]);
})();