aider/aider/mdstream.py
2025-01-07 05:57:39 -08:00

147 lines
4.3 KiB
Python
Executable file

#!/usr/bin/env python
import io
import time
from rich.console import Console
from rich.live import Live
from rich.markdown import Markdown
from rich.text import Text
from aider.dump import dump # noqa: F401
_text = """
# Header
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
## Sub header
- List 1
- List 2
- List me
- List you
```python
import sys
def greeting():
print("Hello world!")
```
## Sub header too
The end.
""" # noqa: E501
class MarkdownStream:
"""Streaming markdown renderer that progressively displays content with a live updating window.
Uses rich.console and rich.live to render markdown content with smooth scrolling and partial updates.
Maintains a sliding window of visible content while streaming in new markdown text.
"""
live = None # Rich Live display instance
when = 0 # Timestamp of last update
min_delay = 0.050 # Minimum time between updates (20fps)
live_window = 6 # Number of lines to keep visible at bottom during streaming
def __init__(self, mdargs=None):
"""Initialize the markdown stream.
Args:
mdargs (dict, optional): Additional arguments to pass to rich Markdown renderer
"""
self.printed = [] # Stores lines that have already been printed
if mdargs:
self.mdargs = mdargs
else:
self.mdargs = dict()
# Initialize rich Live display with empty text
self.live = Live(Text(""), refresh_per_second=1.0 / self.min_delay)
self.live.start()
def __del__(self):
"""Destructor to ensure Live display is properly cleaned up."""
if self.live:
try:
self.live.stop()
except Exception:
pass # Ignore any errors during cleanup
def update(self, text, final=False):
"""Update the displayed markdown content.
Args:
text (str): New markdown text to append
final (bool): If True, this is the final update and we should clean up
"""
now = time.time()
# Throttle updates to maintain smooth rendering
if not final and now - self.when < self.min_delay:
return
self.when = now
# Render the markdown to a string buffer
string_io = io.StringIO()
console = Console(file=string_io, force_terminal=True)
markdown = Markdown(text, **self.mdargs)
console.print(markdown)
output = string_io.getvalue()
# Split rendered output into lines
lines = output.splitlines(keepends=True)
num_lines = len(lines)
# During streaming, keep a window of lines at the bottom visible
if not final:
num_lines -= self.live_window
# If we have new content to display...
if final or num_lines > 0:
num_printed = len(self.printed)
show = num_lines - num_printed
# Skip if no new lines to show
if show <= 0:
return
# Get the new lines and display them
show = lines[num_printed:num_lines]
show = "".join(show)
show = Text.from_ansi(show)
self.live.console.print(show)
# Update our record of printed lines
self.printed = lines[:num_lines]
# Handle final update cleanup
if final:
self.live.update(Text(""))
self.live.stop()
self.live = None
else:
# Update the live window with remaining lines
rest = lines[num_lines:]
rest = "".join(rest)
rest = Text.from_ansi(rest)
self.live.update(rest)
if __name__ == "__main__":
_text = 5 * _text
pm = MarkdownStream()
for i in range(6, len(_text)):
pm.update(_text[:i])
time.sleep(0.01)
pm.update(_text, final=True)