@teaui/core/.dist/iTerm2.js

A high-level terminal UI library for Node

import { colorToHex } from './Color.js';
/**
 * Sets iTerm2 proprietary ANSI codes
 */
export class iTerm2 {
    static _restoreBg;
    /**
     * Returns a promise in case you really want to do flow control here, but it's not
     * necessary; you can fire and forget this as part of `Screen.start()`
     *
     * @example
     * Screen.start(async (program) => {
     *   await iTerm2.setBackground(program, [23, 23, 23])
     *   return new Box({ … })
     * })
     */
    static setBackground(program, bg) {
        process.on('exit', () => {
            iTerm2.restoreBg(program);
        });
        return new Promise(resolve => {
            const hex = colorToHex(bg).slice(1);
            program.onceRawData((input) => {
                const response = typeof input === 'string' ? input : new TextDecoder().decode(input);
                iTerm2._restoreBg = parseBackgroundResponse(response);
                program.write(setBackgroundCommand(hex));
                setTimeout(resolve, 5);
            });
            setTimeout(resolve, 10);
            program.write(getBackgroundColorCommand());
        });
    }
    static restoreBg(program) {
        if (iTerm2._restoreBg) {
            program.write(setBackgroundCommand(iTerm2._restoreBg));
        }
    }
}
function getBackgroundColorCommand() {
    return '\u001b]4;-2;?\x07';
}
function parseBackgroundResponse(response) {
    const match = response.match(/\x1b\]4;-2;rgb:(\w{2})\w*\/(\w{2})\w*\/(\w{2})/);
    if (match) {
        return match[1] + match[2] + match[3];
    }
}
/**
 * @param rgb should not include the '#' symbol
 */
function setBackgroundCommand(rgb) {
    return `\u001b]Ph${rgb.replace('#', '')}\u001b\\`;
}
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