import json
import subprocess
from typing import Any
from urllib.error import URLError
from urllib.request import Request, urlopen
from libqtile.log_utils import logger
from libqtile.widget import base
try:
import xmltodict
def xmlparse(body):
return xmltodict.parse(body)
except ImportError:
# TODO: we could implement a similar parser by hand, but i'm lazy, so let's
# punt for now
def xmlparse(body):
raise Exception("no xmltodict library")
[docs]class GenPollText(base.ThreadPoolText):
"""A generic text widget that polls using poll function to get the text"""
defaults = [
("func", None, "Poll Function"),
]
def __init__(self, **config):
base.ThreadPoolText.__init__(self, "", **config)
self.add_defaults(GenPollText.defaults)
def poll(self):
if not self.func:
return "You need a poll function"
return self.func()
[docs]class GenPollUrl(base.ThreadPoolText):
"""A generic text widget that polls an url and parses it using parse function"""
defaults: list[tuple[str, Any, str]] = [
("url", None, "Url"),
("data", None, "Post Data"),
("parse", None, "Parse Function"),
("json", True, "Is Json?"),
("user_agent", "Qtile", "Set the user agent"),
("headers", {}, "Extra Headers"),
("xml", False, "Is XML?"),
]
def __init__(self, **config):
base.ThreadPoolText.__init__(self, "", **config)
self.add_defaults(GenPollUrl.defaults)
self.headers["User-agent"] = self.user_agent
if self.json:
self.headers["Content-Type"] = "application/json"
if self.data and not isinstance(self.data, str):
self.data = json.dumps(self.data).encode()
def fetch(self):
req = Request(self.url, self.data, self.headers)
res = urlopen(req)
charset = res.headers.get_content_charset()
body = res.read()
if charset:
body = body.decode(charset)
if self.json:
body = json.loads(body)
if self.xml:
body = xmlparse(body)
return body
def poll(self):
if not self.parse or not self.url:
return "Invalid config"
try:
body = self.fetch()
except URLError:
return "No network"
try:
text = self.parse(body)
except Exception:
logger.exception("got exception polling widget")
text = "Can't parse"
return text
[docs]class GenPollCommand(base.ThreadPoolText):
"""A generic text widget to display output from scripts or shell commands"""
defaults = [
("update_interval", 60, "update time in seconds"),
("cmd", None, "command line as a string or list of arguments to execute"),
("shell", False, "run command through shell to enable piping and shell expansion"),
]
def __init__(self, **config):
base.ThreadPoolText.__init__(self, "", **config)
self.add_defaults(GenPollCommand.defaults)
def _configure(self, qtile, bar):
base.ThreadPoolText._configure(self, qtile, bar)
self.add_callbacks({"Button1": self.force_update})
def poll(self):
process = subprocess.run(
self.cmd,
capture_output=True,
text=True,
shell=self.shell,
)
return process.stdout.strip()