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60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
# Copyright (c) Microsoft. All rights reserved.
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"""Text output observer for streaming agent text."""
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from __future__ import annotations
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from typing import TYPE_CHECKING, Any
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from rich.markup import escape
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from .base import ConsoleObserver
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if TYPE_CHECKING:
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from agent_framework import Agent
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from ..state_driver import IUXStateDriver
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class TextOutputObserver(ConsoleObserver):
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"""Displays streaming text output from the agent.
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Writes text chunks incrementally to the UX state driver as they arrive,
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allowing real-time display during streaming.
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"""
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async def on_text(
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self,
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ux: IUXStateDriver,
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text: str,
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agent: Agent,
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session: Any,
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) -> None:
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"""Write each text chunk directly to the UX driver.
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Args:
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ux: The UX state driver for UI updates.
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text: The text chunk to display.
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agent: The AI agent.
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session: The agent session.
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"""
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ux.write_text(escape(text))
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async def on_stream_complete(
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self,
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ux: IUXStateDriver,
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agent: Agent,
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session: Any,
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) -> list | None:
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"""No-op on stream complete (state managed by UX driver).
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Args:
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ux: The UX state driver for UI updates.
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agent: The AI agent.
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session: The agent session.
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Returns:
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None (no follow-up actions).
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"""
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return None
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