(function(undefined){"use strict";function register(a,b,c){if(c!=undefined&&"string"!=typeof c)throw'The filter key "'+c.toString()+'" must be a string.';if(c!=undefined&&!c.length)throw"The filter key must be a non-empty string.";if("function"!=typeof a)throw'The predicate of key "'+c+'" must be a function.';if("undo"===c)throw'"undo" is a reserved key.';if(_keysIndex[c])throw'The filter "'+c+'" already exists.';c&&(_keysIndex[c]=!0),_chain.push({key:c,processor:a,predicate:b})}function unregister(a){_chain=_chain.filter(function(b){return!(b.key in a)});for(var b in a)delete _keysIndex[b]}function Filter(a){_s=a,_g=a.graph}function deepCopy(o){var copy=Object.create(null);for(var i in o)"object"==typeof o[i]&&null!==o[i]?copy[i]=deepCopy(o[i]):"function"==typeof o[i]&&null!==o[i]?eval(" copy[i] = "+o[i].toString()):copy[i]=o[i];return copy}function cloneChain(a){for(var b=a.slice(0),c=0,d=b.length;c<d;c++)b[c]=deepCopy(b[c]),"function"==typeof b[c].processor&&(b[c].processor="filter.processors."+b[c].processor.name);return b}if("undefined"==typeof sigma)throw"sigma is not declared";sigma.utils.pkg("sigma.plugins"),sigma.classes.graph.hasMethod("adjacentNodes")||sigma.classes.graph.addMethod("adjacentNodes",function(a){if("string"!=typeof a)throw"adjacentNodes: the node id must be a string.";var b,c=[];for(b in this.allNeighborsIndex[a])c.push(this.nodesIndex[b]);return c}),sigma.classes.graph.hasMethod("adjacentEdges")||sigma.classes.graph.addMethod("adjacentEdges",function(a){if("string"!=typeof a)throw"adjacentEdges: the node id must be a string.";var b,c,d=this.allNeighborsIndex[a],e=[];for(c in d)for(b in d[c])e.push(d[c][b]);return e});var _g=undefined,_s=undefined,_chain=[],_keysIndex=Object.create(null),Processors={};Processors.nodes=function(a){for(var b=_g.nodes(),c=b.length,d=_g.edges(),e=d.length;c--;)b[c].hidden=!a.call(_g,b[c])||b[c].hidden;for(;e--;)(_g.nodes(d[e].source).hidden||_g.nodes(d[e].target).hidden)&&(d[e].hidden=!0)},Processors.edges=function(a){for(var b=_g.edges(),c=b.length;c--;)b[c].hidden=!a.call(_g,b[c])||b[c].hidden},Processors.neighbors=function a(b){for(var c=_g.nodes(),d=c.length,e=_g.edges(),f=e.length,a=_g.adjacentNodes(b),g=a.length,h={};g--;)h[a[g].id]=!0;for(;d--;)c[d].id===b||c[d].id in h||(c[d].hidden=!0);for(;f--;)(_g.nodes(e[f].source).hidden||_g.nodes(e[f].target).hidden)&&(e[f].hidden=!0)},Filter.prototype.nodesBy=function(a,b){return register(Processors.nodes,a,b),this},Filter.prototype.edgesBy=function(a,b){return register(Processors.edges,a,b),this},Filter.prototype.neighborsOf=function(a,b){if("string"!=typeof a)throw'The node id "'+a.toString()+'" must be a string.';if(!a.length)throw"The node id must be a non-empty string.";return register(Processors.neighbors,a,b),this},Filter.prototype.apply=function(){for(var a=0,b=_chain.length;a<b;++a)_chain[a].processor(_chain[a].predicate);return _chain[0]&&"undo"===_chain[0].key&&_chain.shift(),_s.refresh(),this},Filter.prototype.undo=function(a){function b(){for(var a=_g.nodes(),b=a.length,c=_g.edges(),d=c.length;b--;)a[b].hidden=!1;for(;d--;)c[d].hidden=!1}var c=Object.create(null),d=arguments.length;if(1===d)if("[object Array]"===Object.prototype.toString.call(a))for(var e=0,f=a.length;e<f;e++)c[a[e]]=!0;else c[a]=!0;else if(d>1)for(var e=0;e<d;e++)c[arguments[e]]=!0;else this.clear();return unregister(c),_chain.unshift({key:"undo",processor:b}),this},Filter.prototype.clear=function(){return _chain.length=0,_keysIndex=Object.create(null),this},Filter.prototype.export=function(){var a=cloneChain(_chain);return a},Filter.prototype.import=function(a){if(a===undefined)throw"Wrong arguments.";if("[object Array]"!==Object.prototype.toString.call(a))throw'The chain" must be an array.';for(var b=cloneChain(a),c=0,d=b.length;c<d;c++){if(b[c].predicate===undefined||b[c].processor===undefined)throw"Wrong arguments.";if(b[c].key!=undefined&&"string"!=typeof b[c].key)throw'The filter key "'+b[c].key.toString()+'" must be a string.';if("function"!=typeof b[c].predicate)throw'The predicate of key "'+b[c].key+'" must be a function.';if("string"!=typeof b[c].processor)throw'The processor of key "'+b[c].key+'" must be a string.';switch(b[c].processor){case"filter.processors.nodes":b[c].processor=Processors.nodes;break;case"filter.processors.edges":b[c].processor=Processors.edges;break;case"filter.processors.neighbors":b[c].processor=Processors.neighbors;break;default:throw"Unknown processor "+b[c].processor}}return _chain=b,this};var filter=null;sigma.plugins.filter=function(a){return filter||(filter=new Filter(a)),filter}}).call(this);