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fix(tui): preserve ANSI order at slice boundaries

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Fixes color bleeding after mouse selection and search highlights in
fullscreen mode when a styled token ends at the highlight boundary.

closes #10169
This commit is contained in:
Armin Ronacher 2026-10-01 00:05:28 +02:00
parent d850edee9c
commit 17f3dccbef
3 changed files with 26 additions and 2 deletions
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17
packages/tui/test/regression-slice-by-column-ansi-order.test.ts Normal file
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import assert from "node:assert";
import { describe, it } from "node:test";
import { sliceByColumn } from "../src/utils.ts";
// https://github.com/earendil-works/pi/issues/10169
describe("sliceByColumn ANSI order regression", () => {
it("keeps a reset at the slice start after earlier style codes", () => {
const line = "\x1b[32mfoo\x1b[39m bar";
assert.strictEqual(sliceByColumn(line, 3, 4, true), "\x1b[32m\x1b[39m bar");
});
it("does not leak color into text after a highlighted token", () => {
const line = "Another \x1b[35malpha\x1b[39m line with \x1b[35mbeta\x1b[39m later.";
const after = sliceByColumn(line, 13, 100, true);
assert.strictEqual(after, "\x1b[35m\x1b[39m line with \x1b[35mbeta\x1b[39m later.");
});
});