\s*((?:(?!).)*?)\s*', _c, re.DOTALL)
if matches:
title = matches[0].strip()
title = title.split('\n')[0]
if len(title) > 50: title = title[:50] + '...'
else: title = marker.strip('*')
segments.append({'type': 'fold', 'title': title, 'content': content})
else: segments.append({'type': 'text', 'content': marker + content})
return segments
def render_segments(segments, suffix=''):
# 整块重画:调用方用 slot.container() 包裹,保证 DOM 路径稳定、跨 rerun 对齐(消除"灰色重影")。
# heartbeat 空转时 segments 不变 → Streamlit 后端 diff 无变化 → 前端零闪烁;
# 但 container/markdown 本身是 API 调用,StopException 仍会被抛出(abort 照常起作用)。
for seg in segments:
if seg['type'] == 'fold':
with st.expander(seg['title'], expanded=False): st.markdown(seg['content'])
else:
st.markdown(seg['content'] + suffix)
def agent_backend_stream(prompt):
display_queue = agent.put_task(prompt, source="user")
response = ''
try:
while True:
try: item = display_queue.get(timeout=1)
except queue.Empty:
yield response # heartbeat: let outer st.markdown() run → Streamlit checks StopException
continue
if 'next' in item:
response = item['next']; yield response
if 'done' in item:
yield item['done']; break
finally: agent.abort()
if "messages" not in st.session_state: st.session_state.messages = []
for msg in st.session_state.messages:
with st.chat_message(msg["role"]):
# 用 slot=st.empty() + with slot.container(): ... 的外壳,DOM 路径和流式渲染完全一致,跨 rerun 对齐
slot = st.empty()
with slot.container():
if msg["role"] == "assistant": render_segments(fold_turns(msg["content"]))
else: st.markdown(msg["content"])
# Scroll-height ghost fix: during streaming, expander open/close mid-animation can leave
# phantom height → scrollbar long but can't scroll to bottom. Periodically detect & reflow.
try:
from streamlit import iframe as _st_iframe # 1.56+
_embed_html = lambda html, **kw: _st_iframe(html, **{k: max(v, 1) if isinstance(v, int) else v for k, v in kw.items()})
except (ImportError, AttributeError):
from streamlit.components.v1 import html as _embed_html # ≤1.55
_js_scroll_fix = ("!function(){var p=window.parent;if(p.__sfx)return;p.__sfx=1;"
"var d=p.document;setInterval(function(){"
"var m=d.querySelector('section.main');if(!m)return;"
"var b=m.querySelector('.block-container');if(!b)return;"
"if(m.scrollHeight>b.scrollHeight+150){"
"m.style.overflow='hidden';void m.offsetHeight;m.style.overflow=''}"
"},3000)}()")
# IME composition fix (macOS only) - prevents Enter from submitting during CJK input
_js_ime_fix = ("" if os.name == 'nt' else
"!function(){if(window.parent.__imeFix)return;window.parent.__imeFix=1;"
"var d=window.parent.document,c=0;"
"d.addEventListener('compositionstart',()=>c=1,!0);"
"d.addEventListener('compositionend',()=>c=0,!0);"
"function f(){d.querySelectorAll('textarea[data-testid=stChatInputTextArea]')"
".forEach(t=>{t.__imeFix||(t.__imeFix=1,t.addEventListener('keydown',e=>{"
"e.key==='Enter'&&!e.shiftKey&&(e.isComposing||c||e.keyCode===229)&&"
"(e.stopImmediatePropagation(),e.preventDefault())},!0))})}"
"f();new MutationObserver(f).observe(d.body,{childList:1,subtree:1})}()")
_embed_html(f'', height=0)
if prompt := st.chat_input("any task?"):
ts = time.strftime("%Y-%m-%d %H:%M:%S")
cmd = (prompt or "").strip()
def _reset_and_rerun():
st.session_state.streaming = False
st.session_state.stopping = False
st.session_state.display_queue = None
st.session_state.partial_response = ""
st.session_state.reply_ts = ""
st.session_state.current_prompt = ""
st.session_state.last_reply_time = int(time.time())
st.rerun()
if cmd == "/new":
st.session_state.messages = [{"role": "assistant", "content": reset_conversation(agent), "time": ts}]
_reset_and_rerun()
if cmd.startswith("/continue"):
st.session_state.messages = list(st.session_state.messages) + [
{"role": "user", "content": cmd, "time": ts},
{"role": "assistant", "content": handle_frontend_command(agent, cmd), "time": ts},
]
_reset_and_rerun()
st.session_state.messages.append({"role": "user", "content": prompt})
if hasattr(agent, '_pet_req') and not prompt.startswith('/'): agent._pet_req('state=walk')
with st.chat_message("user"): st.markdown(prompt)
with st.chat_message("assistant"):
frozen = 0; live = st.empty(); response = ''
CURSOR = ' ▌'
for response in agent_backend_stream(prompt):
segs = fold_turns(response)
n_done = max(0, len(segs) - 1)
while frozen < n_done:
with live.container(): render_segments([segs[frozen]])
live = st.empty(); frozen += 1
with live.container(): render_segments([segs[-1]], suffix=CURSOR) # live 区域
segs = fold_turns(response)
for i in range(frozen, len(segs)):
with live.container(): render_segments([segs[i]])
if i < len(segs) - 1: live = st.empty()
st.session_state.messages.append({"role": "assistant", "content": response})
st.session_state.last_reply_time = int(time.time())
if st.session_state.autonomous_enabled:
st.markdown(f"""{st.session_state.get('last_reply_time', int(time.time()))}
""", unsafe_allow_html=True)