@chasemoskal/magical/x/camel-css/parsing/ordinary/utils/update-cursor.js

web toolkit for lit apps

export function updateCursor(part, cursor, newIndex) {
    const linebreaks = (/\n/g.exec(part) ?? []).length;
    const line = cursor.line + linebreaks;
    let column = 0;
    if (linebreaks > 0) {
        const [, lastLine] = /\n(.*)$/.exec(part) ?? [];
        column = 1 + lastLine.length;
    }
    else
        column = cursor.column + (newIndex - cursor.index);
    return {
        line,
        column,
        index: newIndex,
    };
}
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