app.py

import gradio as gr
from haystack.nodes import PreProcessor
from haystack import Document

preprocessor = PreProcessor(
    clean_empty_lines=True,
    clean_whitespace=True,
    clean_header_footer=True,
  	remove_substrings=None,
    split_by="word",
    split_length=200,
    split_respect_sentence_boundary=True,
    split_overlap=0,
  	max_chars_check=10_000
)

def chunk(text):
    splits = preprocessor.process(Document(text))

    return [
        (i%3, split.content) for i, split in enumerate(splits)
    ]

iface = gr.Interface(
    fn=chunk,
    inputs="text",
    outputs=gr.HighlightedText(
        label="Highlights",
        combine_adjacent=False,
        show_legend=True,
        color_map={"0": "red", "1": "green", "2": "yellow"}),
)
iface.launch()