PNG  IHDR;IDATxܻn0K )(pA 7LeG{ §㻢|ذaÆ 6lذaÆ 6lذaÆ 6lom$^yذag5bÆ 6lذaÆ 6lذa{ 6lذaÆ `}HFkm,mӪôô! x|'ܢ˟;E:9&ᶒ}{v]n&6 h_tڠ͵-ҫZ;Z$.Pkž)!o>}leQfJTu іچ\X=8Rن4`Vwl>nG^is"ms$ui?wbs[m6K4O.4%/bC%t Mז -lG6mrz2s%9s@-k9=)kB5\+͂Zsٲ Rn~GRC wIcIn7jJhۛNCS|j08yiHKֶۛkɈ+;SzL/F*\Ԕ#"5m2[S=gnaPeғL lذaÆ 6l^ḵaÆ 6lذaÆ 6lذa; _ذaÆ 6lذaÆ 6lذaÆ RIENDB` var conversions = require('./conversions'); /* this function routes a model to all other models. all functions that are routed have a property `.conversion` attached to the returned synthetic function. This property is an array of strings, each with the steps in between the 'from' and 'to' color models (inclusive). conversions that are not possible simply are not included. */ function buildGraph() { var graph = {}; // https://jsperf.com/object-keys-vs-for-in-with-closure/3 var models = Object.keys(conversions); for (var len = models.length, i = 0; i < len; i++) { graph[models[i]] = { // http://jsperf.com/1-vs-infinity // micro-opt, but this is simple. distance: -1, parent: null }; } return graph; } // https://en.wikipedia.org/wiki/Breadth-first_search function deriveBFS(fromModel) { var graph = buildGraph(); var queue = [fromModel]; // unshift -> queue -> pop graph[fromModel].distance = 0; while (queue.length) { var current = queue.pop(); var adjacents = Object.keys(conversions[current]); for (var len = adjacents.length, i = 0; i < len; i++) { var adjacent = adjacents[i]; var node = graph[adjacent]; if (node.distance === -1) { node.distance = graph[current].distance + 1; node.parent = current; queue.unshift(adjacent); } } } return graph; } function link(from, to) { return function (args) { return to(from(args)); }; } function wrapConversion(toModel, graph) { var path = [graph[toModel].parent, toModel]; var fn = conversions[graph[toModel].parent][toModel]; var cur = graph[toModel].parent; while (graph[cur].parent) { path.unshift(graph[cur].parent); fn = link(conversions[graph[cur].parent][cur], fn); cur = graph[cur].parent; } fn.conversion = path; return fn; } module.exports = function (fromModel) { var graph = deriveBFS(fromModel); var conversion = {}; var models = Object.keys(graph); for (var len = models.length, i = 0; i < len; i++) { var toModel = models[i]; var node = graph[toModel]; if (node.parent === null) { // no possible conversion, or this node is the source model. continue; } conversion[toModel] = wrapConversion(toModel, graph); } return conversion; };