Class OutputWriter

compiler/companion/src/OutputWriter.ts:48–87

}

export class OutputWriter implements IOutputWriter {
  private written: OutputWriterContent[] = [];
  private indentations: Indentation[] = [];

  get writtenLength(): number {
    return this.written.length;
  }

  append(str: string | IOutputWriter) {
    this.written.push(str);
  }

  content(): string {
    return outputContent(this.written);
  }

  beginIndent(indentation: string) {
    const written = this.written;
    this.written = [];
    this.indentations.push({ indentation, previouslyWritten: written });
  }

  endIndent() {
    const indentation = this.indentations.pop();
    if (!indentation) {
      throw new Error('Unbalanced beginIndent/endIndent');
    }
    const writtenWithIdentation = this.written;
    this.written = indentation.previouslyWritten;
    if (writtenWithIdentation.length) {
      this.append(new IndentedContent(writtenWithIdentation, indentation.indentation));
    }
  }

  withIndentation(indentation: string, cb: () => void) {
    this.beginIndent(indentation);
    cb();
    this.endIndent();
  }
}