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use crypto.randomUUID if present

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This commit is contained in:
tophf 2021-06-16 20:04:45 +03:00
parent 83a6808c67
commit 4e87a060f5
1 changed files with 7 additions and 8 deletions
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15
background/style-manager.js
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@ -43,6 +43,13 @@ const styleMan = (() => {
const compileRe = createCompiler(text => `^(${text})$`);
const compileSloppyRe = createCompiler(text => `^${text}$`);
const compileExclusion = createCompiler(buildExclusion);
const uuidv4 = crypto.randomUUID ? crypto.randomUUID.bind(crypto) : (() => {
const seeds = crypto.getRandomValues(new Uint16Array(8));
// 00001111-2222-M333-N444-555566667777
seeds[3] = seeds[3] & 0x0FFF | 0x4000; // UUID version 4, M = 4
seeds[4] = seeds[4] & 0x3FFF | 0x8000; // UUID variant 1, N = 8..0xB
return Array.from(seeds, hex4dashed).join('');
});
const MISSING_PROPS = {
name: style => `ID: ${style.id}`,
_id: () => uuidv4(),
@ -634,14 +641,6 @@ const styleMan = (() => {
}
}
function uuidv4() {
const seeds = crypto.getRandomValues(new Uint16Array(8));
// 00001111-2222-M333-N444-555566667777
seeds[3] = seeds[3] & 0x0FFF | 0x4000; // UUID version 4, M = 4
seeds[4] = seeds[4] & 0x3FFF | 0x8000; // UUID variant 1, N = 8..0xB
return Array.from(seeds, hex4dashed).join('');
}
/** uuidv4 helper: converts to a 4-digit hex string and adds "-" at required positions */
function hex4dashed(num, i) {
return (num + 0x10000).toString(16).slice(-4) + (i >= 1 && i <= 4 ? '-' : '');