fork/cellxgene
1
0
Fork 0
mirror of https://github.com/chanzuckerberg/cellxgene.git synced 2026-09-19 10:58:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

Perf - cache parsed color descriptions

Browse Source
This commit is contained in:
bkmartinjr
2018-05-07 15:13:50 -07:00
parent eb577198a0
commit c9ff8b35c2
1 changed files with 16 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/util/parseRGB.js
View File

@@ -1,7 +1,13 @@
// jshint esversion: 6
import { scaleRGB } from "./scaleRGB";
export const parseRGB = c => {
// maintain a cache of already parsed RGB names, as it is reasonably expensive
// to do this operation. This lets us have speed, but keep the pleasant ability
// to talk about colors by their text description eg, 'rgb(0,0,1)'
//
const colorCache = new Map();
function parseColorName(c) {
if (c[0] !== "#") {
const _c = c.replace(/[^\d,.]/g, "").split(",");
return [scaleRGB(+_c[0]), scaleRGB(+_c[1]), scaleRGB(+_c[2])];
@@ -13,4 +19,13 @@ export const parseRGB = c => {
scaleRGB(parseInt(parsedHex[3], 16))
];
}
}
export const parseRGB = c => {
var cv = colorCache.get(c);
if (!cv) {
cv = parseColorName(c);
colorCache.set(c, cv);
}
return cv;
};