This commit is contained in:
eric sciple 2020-01-24 16:30:50 -05:00
parent 78d7c382fb
commit e7ed525da5
7117 changed files with 1773720 additions and 211 deletions

97
node_modules/color-convert/route.js generated vendored Normal file
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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;
};