this._cascade_new_checked_state = function()

in optaplanner-docs/src/modules/ROOT/images/website/jstree/jstree.js [5623:5684]
48 lines of code
23 McCabe index (conditional complexity)

		this._cascade_new_checked_state = function (id, checkedState) {
			var self = this;
			var t = this.settings.checkbox.tie_selection;
			var node = this._model.data[id];
			var selectedNodeIds = [];
			var selectedChildrenIds = [], i, j, selectedChildIds;

			if (
				(this.settings.checkbox.cascade_to_disabled || !node.state.disabled) &&
				(this.settings.checkbox.cascade_to_hidden || !node.state.hidden)
			) {
				//First try and check/uncheck the children
				if (node.children) {
					for (i = 0, j = node.children.length; i < j; i++) {
						var childId = node.children[i];
						selectedChildIds = self._cascade_new_checked_state(childId, checkedState);
						selectedNodeIds = selectedNodeIds.concat(selectedChildIds);
						if (selectedChildIds.indexOf(childId) > -1) {
							selectedChildrenIds.push(childId);
						}
					}
				}

				var dom = self.get_node(node, true);

				//A node's state is undetermined if some but not all of it's children are checked/selected .
				var undetermined = selectedChildrenIds.length > 0 && selectedChildrenIds.length < node.children.length;

				if(node.original && node.original.state && node.original.state.undetermined) {
					node.original.state.undetermined = undetermined;
				}

				//If a node is undetermined then remove selected class
				if (undetermined) {
					node.state[ t ? 'selected' : 'checked' ] = false;
					dom.attr('aria-selected', false).children('.jstree-anchor').removeClass(t ? 'jstree-clicked' : 'jstree-checked');
				}
				//Otherwise, if the checkedState === true (i.e. the node is being checked now) and all of the node's children are checked (if it has any children),
				//check the node and style it correctly.
				else if (checkedState && selectedChildrenIds.length === node.children.length) {
					node.state[ t ? 'selected' : 'checked' ] = checkedState;
					selectedNodeIds.push(node.id);

					dom.attr('aria-selected', true).children('.jstree-anchor').addClass(t ? 'jstree-clicked' : 'jstree-checked');
				}
				else {
					node.state[ t ? 'selected' : 'checked' ] = false;
					dom.attr('aria-selected', false).children('.jstree-anchor').removeClass(t ? 'jstree-clicked' : 'jstree-checked');
				}
			}
			else {
				selectedChildIds = this.get_checked_descendants(id);

				if (node.state[ t ? 'selected' : 'checked' ]) {
					selectedChildIds.push(node.id);
				}

				selectedNodeIds = selectedNodeIds.concat(selectedChildIds);
			}

			return selectedNodeIds;
		};