Deno/std
1
0
Fork 0
mirror of https://github.com/denoland/std.git synced 2024-11-21 20:50:22 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

refactor(cli): minor cleanups (#5052)

Browse Source 
* refactor(cli): minor cleanups

* revert lazy initialization
This commit is contained in:
Asher Gomez 2024-06-17 19:06:49 +12:00 committed by GitHub
parent 935d665713
commit 7867a60f14
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 14 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
cli/unicode_width.ts
View File

@ -8,12 +8,9 @@ import { runLengthDecode } from "./_run_length.ts";
let tables: Uint8Array[] | null = null;
function lookupWidth(cp: number) {
if (!tables) tables = data.tables.map(runLengthDecode);
const t1Offset = (tables[0] as Uint8Array)[(cp >> 13) & 0xff] as number;
const t2Offset =
(tables[1] as Uint8Array)[128 * t1Offset + ((cp >> 6) & 0x7f)] as number;
const packedWidths =
(tables[2] as Uint8Array)[16 * t2Offset + ((cp >> 2) & 0xf)] as number;
const t1Offset = tables[0]![(cp >> 13) & 0xff]!;
const t2Offset = tables[1]![128 * t1Offset + ((cp >> 6) & 0x7f)]!;
const packedWidths = tables[2]![16 * t2Offset + ((cp >> 2) & 0xf)]!;
const width = (packedWidths >> (2 * (cp & 0b11))) & 0b11;
@ -21,22 +18,22 @@ function lookupWidth(cp: number) {
}
const cache = new Map<string, number | null>();
function charWidth(ch: string) {
if (cache.has(ch)) return cache.get(ch)!;
function charWidth(char: string) {
if (cache.has(char)) return cache.get(char)!;
const cp = ch.codePointAt(0)!;
let v: number | null = null;
const codePoint = char.codePointAt(0)!;
let width: number | null = null;
if (cp < 0x7f) {
v = cp >= 0x20 ? 1 : cp === 0 ? 0 : null;
} else if (cp >= 0xa0) {
v = lookupWidth(cp);
if (codePoint < 0x7f) {
width = codePoint >= 0x20 ? 1 : codePoint === 0 ? 0 : null;
} else if (codePoint >= 0xa0) {
width = lookupWidth(codePoint);
} else {
v = null;
width = null;
}
cache.set(ch, v);
return v;
cache.set(char, width);
return width;
}
/**