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import os
import queue
import signal
from datetime import datetime
import humanize
import multiprocess
from prompt_toolkit import HTML
from prompt_toolkit.formatted_text import to_formatted_text
from prompt_toolkit.key_binding import KeyBindings
from prompt_toolkit.layout.controls import UIContent, UIControl
def create_key_bindings():
kb = KeyBindings()
@kb.add("c-l")
def _clear(event):
event.app.renderer.clear()
@kb.add("c-c")
def _interrupt(event):
os.kill(os.getpid(), signal.SIGTERM)
return kb
class BaseController(UIControl):
def __init__(self, max_lines=25, add_style=True):
super().__init__()
self._creator = os.getpid()
self.max_lines = max_lines
self._add_style = add_style
self._key_bindings = create_key_bindings()
def create_content(self, width, height):
raise NotImplementedError
def is_focusable(self):
return True
def get_key_bindings(self):
return self._key_bindings
def write(self, data):
raise NotImplementedError
def write_line(self, data, fg=None):
if self._add_style and fg is not None:
data = f'<style fg="{fg}">{data}</style>'
# pid header
if os.getpid() != self._creator:
if not self._add_style:
data = f"[P:{os.getpid()} {data}"
else:
data = f'<style fg="#cecece">[P:{os.getpid()}]</style> {data}'
self.write(f"{data}\n")
class TerminalController(BaseController):
def __init__(self, max_lines=25, single_process=True):
super().__init__(max_lines, add_style=True)
self.single_process = single_process
if not single_process:
self.manager = multiprocess.Manager()
self.data = self.manager.list()
else:
self.data = list()
self._closed = False
def close(self):
self._closed = True
if not self.single_process:
self.manager.shutdown()
def write(self, data):
if self._closed:
return
try:
self.data.append(data)
if len(self.data) > self.max_lines:
self.data[:] = self.data[-self.max_lines :]
except BrokenPipeError:
pass
def create_content(self, width, height):
items = ["\n"]
def format_items():
lines = "".join(items).split("\n")
items[:] = [to_formatted_text(HTML(line)) for line in lines]
def get_line(i: int):
return items[i]
if self._closed:
items.append("data stream closed!")
format_items()
return UIContent(
get_line=get_line, line_count=len(items), show_cursor=False
)
for line in self.data:
items.append(line)
format_items()
return UIContent(get_line=get_line, line_count=len(items), show_cursor=False)
class SimpleController(BaseController):
def __init__(self, max_lines, single_process=True):
super().__init__(max_lines, add_style=False)
if single_process:
self.data = queue.Queue()
else:
self.data = multiprocess.Queue()
def close(self):
pass
def write(self, data):
self.data.put(data)
def dump(self):
while not self.data.empty():
yield self.data.get()
class RunStatus(BaseController):
def __init__(self, max_lines=25):
super().__init__(max_lines)
self._status = {}
self._started = datetime.now()
def update(self, results):
self._status.update(results)
def formatted(self):
delta = datetime.now() - self._started
return to_formatted_text(
HTML(
f'<style fg="green" bg="#cecece">SUCCESS: {self._status.get("OK", 0)} </style>'
f'<style fg="red" bg="#cecece"> FAILED: {self._status.get("FAILED", 0)} </style>'
f' WORKERS: {self._status.get("WORKER", 0)}'
f' PROCESSES: {self._status.get("PROCESS", 0)} '
f'<style fg="blue" bg="#cecece"> ELAPSED: {humanize.precisedelta(delta)}</style>'
)
)
def create_content(self, width: int, height: int) -> UIContent:
def get_line(i):
return self.formatted()
return UIContent(get_line=get_line, line_count=1, show_cursor=False)
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