v3/src/ts-protoc-gen/CodePrinter.ts

import { Printer } from './Printer';
import { generateIndent } from './util';

export class CodePrinter {
    private indentation: string;
    constructor(private depth: number, private printer: Printer) {
        this.indentation = generateIndent(1);
    }
    indent() {
        this.depth++;
        return this;
    }
    dedent() {
        this.depth--;
        return this;
    }
    printLn(line: string) {
        this.printer.printLn(new Array(this.depth + 1).join(this.indentation) + line);
        return this;
    }

    printEmptyLn() {
        this.printer.printEmptyLn();
        return this;
    }
}