314 lines
11 KiB
Python
314 lines
11 KiB
Python
import os
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import importlib
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import importlib.util
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import logging
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import threading
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import core.config
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import core.input
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import core.widget
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import core.decorators
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import util.format
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try:
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error = ModuleNotFoundError("")
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except Exception as e:
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ModuleNotFoundError = Exception
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log = logging.getLogger(__name__)
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def import_user(module_short, config, theme):
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usermod = os.path.expanduser("~/.config/bumblebee-status/modules/{}.py".format(module_short))
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if os.path.exists(usermod):
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if hasattr(importlib, "machinery"):
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log.debug("importing {} from user via machinery".format(module_short))
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mod = importlib.machinery.SourceFileLoader("modules.{}".format(module_short),
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os.path.expanduser(usermod)).load_module()
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return getattr(mod, "Module")(config, theme)
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else:
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log.debug("importing {} from user via importlib.util".format(module_short))
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try:
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spec = importlib.util.spec_from_file_location("modules.{}".format(module_short), usermod)
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mod = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(mod)
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return mod.Module(config, theme)
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except Exception as e:
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spec = importlib.util.find_spec("modules.{}".format(module_short), usermod)
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mod = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(mod)
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return mod.Module(config, theme)
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raise ImportError("not found")
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"""Loads a module by name
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:param module_name: Name of the module to load
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:param config: Configuration to apply to the module (defaults to an empty configuration)
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:param theme: Theme for this module, defaults to None, which means whatever is configured in "config"
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:return: A module object representing the module, or an Error module if loading failed
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:rtype: class bumblebee_status.module.Module
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"""
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def load(module_name, config=core.config.Config([]), theme=None):
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error = None
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module_short, alias = (module_name.split(":") + [module_name])[0:2]
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config.set("__alias__", alias)
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try:
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mod = importlib.import_module("modules.core.{}".format(module_short))
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log.debug("importing {} from core".format(module_short))
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return getattr(mod, "Module")(config, theme)
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except ImportError as e:
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try:
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log.warning("failed to import {} from core: {}".format(module_short, e))
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mod = importlib.import_module("modules.contrib.{}".format(module_short))
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log.debug("importing {} from contrib".format(module_short))
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return getattr(mod, "Module")(config, theme)
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except ImportError as e:
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try:
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log.warning("failed to import {} from system: {}".format(module_short, e))
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return import_user(module_short, config, theme)
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except ImportError as e:
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log.fatal("import failed: {}".format(e))
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log.fatal("failed to import {}".format(module_short))
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return Error(config=config, module=module_name, error="unable to load module")
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class Module(core.input.Object):
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"""Represents a module (single piece of functionality) of the bar
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:param config: Configuration to apply to the module (defaults to an empty configuration)
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:param theme: Theme for this module, defaults to None, which means whatever is configured in "config"
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:param widgets: A list of bumblebee_status.widget.Widget objects that the module is comprised of
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"""
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def __init__(self, config=core.config.Config([]), theme=None, widgets=[]):
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super().__init__()
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self.background = False
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self.__thread = None
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self.__config = config
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self.__widgets = widgets if isinstance(widgets, list) else [widgets]
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self.module_name = self.__module__.split(".")[-1]
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self.name = self.module_name
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self.alias = self.__config.get("__alias__", None)
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self.id = self.alias if self.alias else self.name
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self.next_update = None
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self.minimized = False
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self.minimized = self.parameter("start-minimized", False)
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self.theme = theme
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for widget in self.__widgets:
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widget.module = self
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"""Override this to determine when to show this module
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:return: True if the module should be hidden, False otherwise
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:rtype: boolean
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"""
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def hidden(self):
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return False
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"""Override this to show the module even if it normally would be scrolled away
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:return: True if the module should be hidden, False otherwise
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:rtype: boolean
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"""
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def scroll(self):
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return True
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"""Retrieve CLI/configuration parameters for this module. For example, if
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the module is called "test" and the user specifies "-p test.x=123" on the
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commandline, using self.parameter("x") retrieves the value 123.
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:param key: Name of the parameter to retrieve
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:param default: Default value, if parameter is not set by user (defaults to None)
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:return: Parameter value, or default
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:rtype: string
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"""
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def parameter(self, key, default=None):
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value = default
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for prefix in [self.name, self.module_name, self.alias]:
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value = self.__config.get("{}.{}".format(prefix, key), value)
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if self.minimized:
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value = self.__config.get("{}.minimized.{}".format(prefix, key), value)
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return value
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"""Set a parameter for this module
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:param key: Name of the parameter to set
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:param value: New value of the parameter
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"""
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def set(self, key, value):
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self.__config.set("{}.{}".format(self.name, key), value)
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"""Override this method to define tasks that should be done during each
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update interval (for instance, querying an API, calling a CLI tool to get new
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date, etc.
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"""
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def update(self):
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pass
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def update_wrapper(self):
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if self.background == True:
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if self.__thread and self.__thread.is_alive():
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return # skip this update interval
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self.__thread = threading.Thread(target=self.internal_update, args=(True,))
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self.__thread.start()
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else:
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self.internal_update(False)
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"""Wrapper method that ensures that all exceptions thrown by the
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update() method are caught and displayed in a bumblebee_status.module.Error
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module
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"""
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def internal_update(self, trigger_redraw=False):
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try:
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self.update()
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if trigger_redraw:
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core.event.trigger("update", [self.id], redraw_only=True)
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except Exception as e:
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self.set("interval", 1)
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module = Error(config=self.__config, module="error", error=str(e))
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self.__widgets = [module.widget()]
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self.update = module.update
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"""Retrieves the list of widgets for this module
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:return: A list of widgets
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:rtype: list of bumblebee_status.widget.Widgets
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"""
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def widgets(self):
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return self.__widgets
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"""Removes all widgets of this module"""
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def clear_widgets(self):
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del self.__widgets[:]
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"""Adds a widget to the module
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:param full_text: Text or callable (method) that defines the text of the widget (defaults to "")
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:param name: Name of the widget, defaults to None, which means autogenerate
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:return: The new widget
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:rtype: bumblebee_status.widget.Widget
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"""
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def add_widget(self, full_text="", name=None, hidden=False):
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widget_id = "{}::{}".format(self.name, len(self.widgets()))
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widget = core.widget.Widget(full_text=full_text, name=name, widget_id=widget_id, hidden=hidden)
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self.widgets().append(widget)
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widget.module = self
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return widget
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"""Convenience method to retrieve a named widget
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:param name: Name of widget to retrieve, defaults to None (in which case the first widget is returned)
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:return: The widget with the corresponding name, None if not found
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:rtype: bumblebee_status.widget.Widget
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"""
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def widget(self, name=None, widget_id=None):
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if not name and not widget_id:
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return self.widgets()[0]
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for w in self.widgets():
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if name and w.name == name:
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return w
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if w.id == widget_id:
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return w
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return None
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"""Override this method to define states for the module
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:param widget: Widget for which state should be returned
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:return: a list of states for this widget
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:rtype: list of strings
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"""
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def state(self, widget):
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return []
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"""Convenience method that sets warning and critical state for numbers
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:param value: Current value to calculate state against
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:param warn: Warning threshold
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:parm crit: Critical threshold
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:return: None if value is below both thresholds, "critical", "warning" as appropriate otherwise
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:rtype: string
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"""
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def threshold_state(self, value, warn, crit):
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if value > float(self.parameter("critical", crit)):
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return "critical"
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if value > float(self.parameter("warning", warn)):
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return "warning"
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return None
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def register_callbacks(self):
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actions = [
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{"name": "left-click", "id": core.input.LEFT_MOUSE},
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{"name": "right-click", "id": core.input.RIGHT_MOUSE},
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{"name": "middle-click", "id": core.input.MIDDLE_MOUSE},
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{"name": "wheel-up", "id": core.input.WHEEL_UP},
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{"name": "wheel-down", "id": core.input.WHEEL_DOWN},
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]
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for action in actions:
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if self.parameter(action["name"]):
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core.input.register(
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self,
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action["id"],
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self.parameter(action["name"]),
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util.format.asbool(
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self.parameter("{}-wait".format(action["name"]), False)
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),
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)
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class Error(Module):
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"""Represents an "error" module
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:param module: The module name that produced the error
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:param error: The error message to display
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:param config: Configuration to apply to the module (defaults to an empty configuration)
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:param theme: Theme for this module, defaults to None, which means whatever is configured in "config"
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"""
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def __init__(self, module, error, config=core.config.Config([]), theme=None):
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super().__init__(config, theme, core.widget.Widget(self.full_text))
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self.__module = module
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self.__error = error
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"""Returns the error message
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:param widget: the error widget to display
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"""
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def full_text(self, widget):
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return "{}: {}".format(self.__module, self.__error)
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"""Overridden state, always returns critical (it *is* an error, after all"""
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def state(self, widget):
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return ["critical"]
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# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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