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from __future__ import annotations
from typing import Iterable
from rich.console import Console, Group
from rich.live import Live
from rich.markdown import Markdown
from rich.padding import Padding
from rich.status import Status
from rich.syntax import Syntax
from rich.table import Table
from rich.text import Text
from rich.theme import Theme
from ycode.agent.loop import AgentEvents, TaskResult, TaskStatus, describe_status
from ycode.agent.planner import Plan
from ycode.errors import YCodeError
from ycode.llm.base import AssistantMessage, ToolCall
from ycode.security.permissions import ApprovalRequest
from ycode.tools.base import ToolResult
from ycode.tools.git import FileChange
from ycode.ui.banner import TAGLINE, BannerInfo, banner_lines, info_lines, supports_unicode
THEME = Theme({
"accent": "bold cyan",
"muted": "grey62",
"ok": "green",
"err": "bold red",
"warn": "yellow",
"step": "cyan",
"banner": "bold cyan",
"key": "bold",
})
MAX_INLINE_DIFF_LINES = 40
def make_console(theme: str = "default", **kwargs) -> Console:
return Console(theme=THEME, no_color=(theme == "mono"), highlight=False, **kwargs)
class ConsoleUI(AgentEvents):
def __init__(self, console: Console | None = None, *, show_diffs: bool = True) -> None:
self.console = console or make_console()
self.show_diffs = show_diffs
self.unicode = supports_unicode(self.console.encoding)
self._status: Status | None = None
self._live: Live | None = None
self._buffer = ""
# ------------------------------------------------------------ symbols
@property
def sym(self) -> dict[str, str]:
if self.unicode:
return {"step": "◇", "ok": "✓", "err": "✗", "warn": "⚠", "doing": "▸", "todo": "○"}
return {"step": "*", "ok": "+", "err": "x", "warn": "!", "doing": ">", "todo": "-"}
# ------------------------------------------------------------ banner
def print_banner(self, info: BannerInfo, *, show_hint: bool = True) -> None:
art = Text("\n".join(banner_lines(unicode=self.unicode)), style="banner")
width = max(len(line) for line in banner_lines(unicode=self.unicode))
self.console.print()
self.console.print(Padding(art, (0, 2), expand=False))
self.console.print(Padding(Text(TAGLINE.center(width).rstrip(), style="muted"), (0, 2), expand=False))
self.console.print()
table = Table.grid(padding=(0, 2))
table.add_column(style="muted")
table.add_column()
for key, value in info_lines(info):
table.add_row(key, value)
self.console.print(Padding(table, (0, 2), expand=False))
self.console.print()
if show_hint:
self.console.print(Padding(
Text("Type a task, or /help for commands. Esc+Enter inserts a newline.", style="muted"),
(0, 2), expand=False,
))
self.console.print()
# ------------------------------------------------------- live helpers
def _start_status(self, message: str) -> None:
self._stop_live()
if not self.console.is_terminal:
return
if self._status is None:
self._status = self.console.status(Text(message, style="muted"), spinner="dots")
self._status.start()
else:
self._status.update(Text(message, style="muted"))
def _stop_status(self) -> None:
if self._status is not None:
self._status.stop()
self._status = None
def _stop_live(self) -> None:
"""Finish any streamed text and print it as rendered Markdown."""
if self._live is not None:
self._live.stop()
self._live = None
if self._buffer.strip():
self.console.print(Padding(Markdown(self._buffer.strip()), (0, 2), expand=False))
self.console.print()
self._buffer = ""
def stop(self) -> None:
self._stop_status()
self._stop_live()
# ------------------------------------------------------- agent events
def on_step_start(self, step: int, max_steps: int) -> None:
self._start_status(f"Thinking... (step {step}/{max_steps})")
def on_text(self, chunk: str) -> None:
self._stop_status()
self._buffer += chunk
if not self.console.is_terminal:
return
preview = Padding(Markdown(self._buffer), (0, 2), expand=False)
if self._live is None:
self._live = Live(preview, console=self.console, transient=True,
vertical_overflow="ellipsis", refresh_per_second=12)
self._live.start()
else:
self._live.update(preview)
def on_tool_call_streaming(self, name: str) -> None:
self._stop_live()
self._start_status(f"Preparing {name}...")
def on_response_done(self, message: AssistantMessage) -> None:
self._stop_status()
self._stop_live()
def on_tool_start(self, call: ToolCall, description: str) -> None:
self._stop_status()
if call.name == "update_plan":
return
self.console.print(Text.assemble((" " + self.sym["step"] + " ", "step"), (description, "")))
self._start_status(description + "...")
def on_tool_end(self, call: ToolCall, result: ToolResult) -> None:
self._stop_status()
if call.name == "update_plan" and not result.is_error:
return
display = result.display or {}
failed = result.is_error or display.get("failed")
mark, style = (self.sym["err"], "err") if failed else (self.sym["ok"], "ok")
self.console.print(Text.assemble((" " + mark + " ", style), (result.summary or "Done", "muted")))
if display.get("output_tail"):
self.console.print(Padding(Text(display["output_tail"], style="muted"), (0, 6), expand=False))
if self.show_diffs and display.get("diff"):
self.print_diff(display["diff"], limit=MAX_INLINE_DIFF_LINES, indent=6)
self.console.print()
def on_plan(self, plan: Plan) -> None:
self._stop_status()
self.print_plan(plan)
def on_notice(self, message: str, level: str = "info") -> None:
self._stop_status()
style = {"warning": "warn", "error": "err"}.get(level, "muted")
mark = self.sym["warn"] if level in ("warning", "error") else self.sym["step"]
self.console.print(Text(f" {mark} {message}", style=style))
# --------------------------------------------------------- rendering
def print_plan(self, plan: Plan) -> None:
if plan.is_empty:
self.console.print(Text(" No plan for the current task.", style="muted"))
return
self.console.print(Text.assemble((" " + self.sym["step"] + " ", "step"), ("Plan", "key")))
marks = {"done": (self.sym["ok"], "ok"), "in_progress": (self.sym["doing"], "accent"),
"pending": (self.sym["todo"], "muted"), "skipped": ("-", "muted")}
for i, step in enumerate(plan.steps, 1):
mark, style = marks[step.status]
text_style = "muted" if step.status in ("done", "skipped") else ""
self.console.print(Text.assemble((f" {mark} ", style), (f"{i}. {step.text}", text_style)))
self.console.print()
def print_diff(self, diff: str, *, limit: int | None = None, indent: int = 2) -> None:
lines = diff.rstrip("\n").splitlines()
hidden = 0
if limit is not None and len(lines) > limit:
hidden = len(lines) - limit
lines = lines[:limit]
syntax = Syntax("\n".join(lines), "diff", theme="ansi_dark", background_color="default",
word_wrap=False)
self.console.print(Padding(syntax, (0, indent), expand=False))
if hidden:
self.console.print(Padding(Text(f"... {hidden} more lines (use /diff)", style="muted"), (0, indent), expand=False))
def print_changes(self, changes: Iterable[FileChange]) -> None:
for change in changes:
style = {"A": "ok", "D": "err"}.get(change.short, "warn")
self.console.print(Text.assemble((f" {change.short} ", style), change.path))
def print_task_summary(self, result: TaskResult, changes: list[FileChange]) -> None:
self.stop()
if result.error is not None:
self.print_error(result.error)
if changes:
self.console.print(Text(" Changes:", style="key"))
self.print_changes(changes)
self.console.print()
if result.commands_run:
self.console.print(Text(" Commands:", style="key"))
for command, code in result.commands_run[-8:]:
ok = code == 0
mark, style = (self.sym["ok"], "ok") if ok else (self.sym["err"], "err")
suffix = "" if ok else (" (timed out)" if code is None else f" (exit {code})")
self.console.print(Text.assemble((f" {mark} ", style), command, (suffix, "muted")))
self.console.print()
style = {TaskStatus.COMPLETED: "ok", TaskStatus.INTERRUPTED: "warn",
TaskStatus.STEP_LIMIT: "warn"}.get(result.status, "err")
mark = self.sym["ok"] if result.status is TaskStatus.COMPLETED else self.sym["warn"]
self.console.print(Text.assemble(
(f" {mark} {describe_status(result)}", style),
(f" ({result.steps} step{'s' if result.steps != 1 else ''})", "muted"),
))
self.console.print()
def print_error(self, error: BaseException) -> None:
self.stop()
message = str(error) or type(error).__name__
hint = getattr(error, "hint", None) if isinstance(error, YCodeError) else None
parts = [Text(f" {self.sym['err']} {message}", style="err")]
if hint:
parts.append(Padding(Text(hint, style="muted"), (0, 4), expand=False))
self.console.print(Group(*parts))
def info(self, message: str) -> None:
self.console.print(Text(f" {message}", style="muted"))
def print_table(self, rows: list[tuple[str, str]]) -> None:
table = Table.grid(padding=(0, 2))
table.add_column(style="muted")
table.add_column()
for key, value in rows:
table.add_row(key, value)
self.console.print(Padding(table, (0, 2), expand=False))
# ---------------------------------------------------------- approval
def ask_approval(self, request: ApprovalRequest) -> str:
"""Interactive y/N/a prompt. Returns 'yes', 'no' or 'always'."""
self.stop()
title = {"command": "run", "write": "write to", "read": "read"}.get(request.kind, request.kind)
self.console.print()
self.console.print(Text(f" {self.sym['warn']} YCode wants to {title}:", style="warn"))
self.console.print()
self.console.print(Padding(Text(request.subject, style="bold"), (0, 6), expand=False))
self.console.print()
if request.reason:
self.console.print(Text(f" Reason: {request.reason}", style="muted"))
try:
answer = self.console.input(" Allow? [y/N/a=always this session] ").strip().lower()
except EOFError:
answer = ""
self.console.print()
if answer in ("y", "yes"):
return "yes"
if answer in ("a", "always"):
return "always"
self.console.print(Text(" Denied.", style="muted"))
return "no"
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