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import urwid, os, subprocess, fcntl, glob
from trem_colors import trem_to_markup, trem_palette
try:
from local_config import *
except ImportError:
SERVER_PATH = "testing/home@*"
PIPE_PATH = "testing/home@%s/slacker/pipe"
LOG_COMMAND = ["/usr/bin/env", "python3", "testing/log_simulator.py"]
class JournalViewer:
def __init__(self, status, loop):
self.status = status
self.loop = loop
self.list_walker = urwid.SimpleFocusListWalker([])
self.list_box = urwid.ListBox(self.list_walker)
self.root = self.list_box
self.proc = None
self.following = True
# FIXME: call this whenever the user scrolls through the log
def update(self):
lc = len(self.list_walker)
if self.following:
self.list_box.set_focus(lc - 1)
self.status.set_text("%d/%d line%s, [F]ollow: %s" % (
self.list_box.focus_position + 1,
lc, "" if lc == 1 else "s",
"on" if self.following else "off"))
def write(self, text, color_override=None):
for line in str(text).split("\n"):
if color_override is None:
markup = trem_to_markup(line)
else:
markup = (color_override, line)
self.list_walker.append(urwid.Text(markup))
self.update()
def proc_open(self, argv):
if self.proc is not None:
self.loop.remove_watch_file(self.pipefd)
# FIXME: closing the fd fucks up the event loop
#os.close(self.pipefd)
self.proc.kill()
self.pipefd, writefd = os.pipe()
fl = fcntl.fcntl(self.pipefd, fcntl.F_GETFL)
fcntl.fcntl(self.pipefd, fcntl.F_SETFL, fl | os.O_NONBLOCK)
self.pipe = os.fdopen(self.pipefd)
self.proc = subprocess.Popen(argv, stdout=writefd, stderr=writefd)
self.loop.watch_file(self.pipefd, self.proc_write)
def proc_write(self):
self.write(self.pipe.read())
class ServerSelectorPopup(urwid.WidgetWrap):
def __init__(self, parent, console):
self.parent = parent
self.console = console
buttons = list()
for server in ServerSelector.list_servers():
button = urwid.Button(server)
urwid.connect_signal(button, "click", self.click)
buttons.append(button)
filler = urwid.Filler(urwid.Pile(buttons))
super().__init__(urwid.AttrWrap(filler, "popup"))
def click(self, button):
server = button.label # jfc
self.parent.close_pop_up()
self.console.select_server(server)
class ServerSelector(urwid.PopUpLauncher):
def list_servers():
return [path.split("@")[1]
for path in glob.glob(SERVER_PATH)]
def __init__(self, console):
self.console = console
self.button = urwid.Button("...")
super().__init__(self.button)
urwid.connect_signal(self.button, "click", lambda _: self.open_pop_up())
def create_pop_up(self):
pop_up = ServerSelectorPopup(self, self.console)
return pop_up
def get_pop_up_parameters(self):
return {'left':0, 'top':1, 'overlay_width':20, 'overlay_height':5}
class Console:
def __init__(self, loop):
self.loop = loop
self.edit_pre = ServerSelector(self)
self.edit_pre_attrmap = urwid.AttrMap(self.edit_pre, "button",
"button focus")
self.edit = urwid.Edit(" $ ")
self.edit_attrmap = urwid.AttrMap(self.edit, "edit", "edit focus")
self.edit_box = urwid.Columns(
[self.edit_pre_attrmap, ("weight", 6, self.edit_attrmap)]
)
self.status = urwid.Text("", align="center")
self.status_attrmap = urwid.AttrMap(self.status, "status", None)
self.viewer = JournalViewer(self.status, self.loop)
self.root = urwid.Frame(self.viewer.root,
header=self.status_attrmap,
footer=self.edit_box)
# Focus on the edit box
self.root.focus_position = "footer"
self.edit_box.focus_position = 1
servers = ServerSelector.list_servers()
if len(servers) == 0:
print("There are no servers in '%s'" % SERVER_PATH)
exit(1)
self.select_server("trench" if "trench" in servers else servers[0])
def unhandled_input(self, text):
if text == "tab":
if self.root.focus_position == "body":
self.root.focus_position = "footer"
self.edit_box.focus_position = 1
else:
self.root.focus_position = "body"
elif text == "enter":
command = self.edit.get_edit_text()
self.edit.set_edit_text("")
self.execute(command)
elif text == "f":
self.viewer.following = not self.viewer.following
self.viewer.update()
def select_server(self, server):
self.server = server
self.viewer.write("Now viewing logs from %s" % server,
color_override="system")
self.edit_pre.button.set_label(server)
argv = [arg % server if "%s" in arg else arg for arg in LOG_COMMAND]
self.viewer.proc_open(argv)
def execute(self, command):
self.viewer.write(PIPE_PATH % self.server)
with open(PIPE_PATH % self.server, "w") as fp:
fp.write(command + "\n")
palette = [
# UI elements
("button", "black", "white"),
("button focus", "black", "white"),
("status", "black", "white"),
("edit focus", "white", "dark gray"),
("edit", "white", "black"),
("popup", "black", "white"),
# Log text
("system", "white, bold", "dark gray"),
] \
+ trem_palette
screen = urwid.raw_display.Screen()
screen.set_terminal_properties(colors=2**24)
screen.register_palette(palette)
loop = urwid.MainLoop(None, screen=screen, pop_ups=True)
console = Console(loop)
loop.widget = console.root
loop.unhandled_input = console.unhandled_input
try:
loop.run()
except KeyboardInterrupt:
exit()
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