# pdf_viewer_app.py
import gradio as gr


def render_markdown(text: str):
    return text or ""


if __name__ == "__main__":
    with gr.Blocks() as demo:
        input_md = gr.Textbox(
            label="Input",
            placeholder="Type Markdown/LaTeX here...",
            lines=12,
        )
        render_btn = gr.Button("Render", variant="primary")

        md = gr.Markdown(
            label="Markdown rendering",
            show_copy_button=True,
            line_breaks=True,
        )

        render_btn.click(
            fn=render_markdown,
            inputs=input_md,
            outputs=md,
        )

    demo.launch()