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Improve stream rendering #9

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48 changes: 45 additions & 3 deletions llmvm/client/printing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@

from rich.console import Console
from rich.markdown import Markdown
from rich.syntax import Syntax
from rich.theme import Theme

from llmvm.common.container import Container
Expand Down Expand Up @@ -109,12 +110,15 @@ async def decode(content: str) -> bool:

class StreamPrinter():
def __init__(self, file=sys.stderr):
self.buffer = ''
self.console = Console(file=file)
self.markdown_mode = False
self.token_color = Container.get_config_variable('client_stream_token_color', default='bright_black')
self.thinking_token_color = Container.get_config_variable('client_stream_thinking_token_color', default='cyan')

# state for line-by-line rich rendering
self.current_line = ''
self.in_code_block = False
self.code_lang = ''

async def display_image(self, image_bytes):
if len(image_bytes) < 10:
return
Expand Down Expand Up @@ -208,8 +212,46 @@ async def write(self, node: AstNode):
string = str(node)

if string:
self.buffer += string
self.console.print(string, end='', style=f"{token_color}", highlight=False)
self.current_line += string

while '\n' in self.current_line:
line, self.current_line = self.current_line.split('\n', 1)
await self._render_line(line + '\n')

if isinstance(node, TokenStopNode) or isinstance(node, StreamingStopNode):
if self.current_line:
await self._render_line(self.current_line)
self.current_line = ''
return

async def _erase_last_line(self):
self.console.file.write('\x1b[1A\r\x1b[2K')
self.console.file.flush()

async def _render_line(self, text: str):
await self._erase_last_line()
if text.strip().startswith('```'):
Markdown.__rich_console__ = markdown__rich_console__
self.console.print(Markdown(text), end='')
fence_content = text.strip()[3:].strip()
if self.in_code_block:
self.in_code_block = False
self.code_lang = ''
else:
self.in_code_block = True
if fence_content:
self.code_lang = fence_content
elif self.in_code_block:
lang = self.code_lang if self.code_lang else 'text'
syntax = Syntax(text.rstrip('\n'), lang, theme="monokai", background_color="default", word_wrap=True, padding=0)
self.console.print(syntax)
if text.endswith('\n'):
self.console.print()
else:
Markdown.__rich_console__ = markdown__rich_console__
self.console.print(Markdown(text), end='')



class ConsolePrinter:
Expand Down