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