define(["filters/nodefilter"], function (NodeFilter) { return function () { var targets = []; var filterObservers = []; var filters = []; var filteredData; var data; function remove(d) { targets = targets.filter(function (e) { return d !== e; }); } function add(d) { targets.push(d); if (filteredData !== undefined) { d.setData(filteredData); } } function setData(d) { data = d; refresh(); } function refresh() { if (data === undefined) { return; } var filter = filters.reduce(function (a, f) { return function (d) { return a(d) && f.run(d); }; }, function () { return true; }); filteredData = new NodeFilter(filter)(data); targets.forEach(function (t) { t.setData(filteredData); }); } function notifyObservers() { filterObservers.forEach(function (d) { d.filtersChanged(filters); }); } function addFilter(d) { filters.push(d); notifyObservers(); d.setRefresh(refresh); refresh(); } function removeFilter(d) { filters = filters.filter(function (e) { return d !== e; }); notifyObservers(); refresh(); } function watchFilters(d) { filterObservers.push(d); d.filtersChanged(filters); return function () { filterObservers = filterObservers.filter(function (e) { return d !== e; }); }; } return { add: add, remove: remove, setData: setData, addFilter: addFilter, removeFilter: removeFilter, watchFilters: watchFilters, refresh: refresh }; }; });