27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
import ansiStyles from "ansi-styles";
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import { endCodesSet } from "./ansiCodes.js";
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/** Reduces the given array of ANSI codes to the minimum necessary to render with the same style */
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export function reduceAnsiCodes(codes) {
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return reduceAnsiCodesIncremental([], codes);
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}
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/** Like {@link reduceAnsiCodes}, but assumes that `codes` is already reduced. Further reductions are only done for the items in `newCodes`. */
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export function reduceAnsiCodesIncremental(codes, newCodes) {
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let ret = [...codes];
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for (const code of newCodes) {
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if (code.code === ansiStyles.reset.open) {
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// Reset code, disable all codes
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ret = [];
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}
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else if (endCodesSet.has(code.code)) {
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// This is an end code, disable all matching start codes
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ret = ret.filter((retCode) => retCode.endCode !== code.code);
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}
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else {
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// This is a start code. Disable all styles this "overrides", then enable it
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ret = ret.filter((retCode) => retCode.endCode !== code.endCode);
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ret.push(code);
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}
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}
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return ret;
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}
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//# sourceMappingURL=reduce.js.map
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