streamlit_agent/clear_results.py

import streamlit as st


# A hack to "clear" the previous result when submitting a new prompt. This avoids
# the "previous run's text is grayed-out but visible during rerun" Streamlit behavior.
class DirtyState:
    NOT_DIRTY = "NOT_DIRTY"
    DIRTY = "DIRTY"
    UNHANDLED_SUBMIT = "UNHANDLED_SUBMIT"


def get_dirty_state() -> str:
    return st.session_state.get("dirty_state", DirtyState.NOT_DIRTY)


def set_dirty_state(state: str) -> None:
    st.session_state["dirty_state"] = state


def with_clear_container(submit_clicked: bool) -> bool:
    if get_dirty_state() == DirtyState.DIRTY:
        if submit_clicked:
            set_dirty_state(DirtyState.UNHANDLED_SUBMIT)
            st.rerun()
        else:
            set_dirty_state(DirtyState.NOT_DIRTY)

    if submit_clicked or get_dirty_state() == DirtyState.UNHANDLED_SUBMIT:
        set_dirty_state(DirtyState.DIRTY)
        return True

    return False