[modules] Add CPU module

Also, change minwidth from theme.minwidth to widget property

core/decorators.py

@@ -8,7 +8,7 @@ def scrollable(func):
             return text
         width = widget.get('theme.width', util.format.asint(module.parameter('width', 30)))
         if util.format.asbool(module.parameter('scrolling.makewide', True)):
-            widget.set('theme.minwidth', 'A'*width)
+            widget.minwidth = 'A'*width
         if width < 0 or len(text) <= width:
             return text
 

core/module.py

@@ -5,6 +5,11 @@ import core.input
 import core.widget
 import core.decorators
 
+try:
+    error = ModuleNotFoundError('')
+except Exception as e:
+    ModuleNotFoundError = Exception
+
 log = logging.getLogger(__name__)
 
 def load(module_name, config=None):

core/output.py

@@ -86,7 +86,7 @@ class i3(object):
             'full_text': self.__decorate(module, widget, text),
             'color': self._theme.fg(widget),
             'background': self._theme.bg(widget),
-            'min_width': widget.get('theme.minwidth'),
+            'min_width': self.__decorate(module, widget, widget.minwidth),
         })
         return [attr]
 

core/widget.py

@@ -9,6 +9,8 @@ class Widget(util.store.Store, core.input.Object):
         self._module = module
         self._name = name
 
+        self.minwidth = None
+
     def name(self):
         return self._name
 

doc/MODULE_MIGRATION.md

@@ -4,6 +4,6 @@
 - bumblebee.engine.Module has been replaced with core.module.Module
 - module __init__ has less parameters
 - super() works differently
-- register_callback is now core.input.register
+- engine.input.register_callback is now core.input.register
 - update() doesn't have a list of widgets anymore
 

modules/core/cpu.py

@@ -0,0 +1,38 @@
+# pylint: disable=C0111,R0903
+
+'''Displays CPU utilization across all CPUs.
+
+Parameters:
+    * cpu.warning : Warning threshold in % of CPU usage (defaults to 70%)
+    * cpu.critical: Critical threshold in % of CPU usage (defaults to 80%)
+    * cpu.format  : Format string (defaults to '{:.01f}%')
+'''
+
+import psutil
+
+import core.module
+import core.widget
+import core.input
+
+class Module(core.module.Module):
+    def __init__(self, config=None):
+        super().__init__(config, core.widget.Widget(self.utilization))
+        self.widget().minwidth = self._format.format(100.0-10e-20)
+        self._utilization = psutil.cpu_percent(percpu=False)
+        core.input.register(self, button=core.input.LEFT_MOUSE,
+            cmd='gnome-system-monitor')
+
+    @property
+    def _format(self):
+        return self.parameter('format', '{:.01f}%')
+
+    def utilization(self, _):
+        return self._format.format(self._utilization)
+
+    def update(self):
+        self._utilization = psutil.cpu_percent(percpu=False)
+
+    def state(self, _):
+        return self.threshold_state(self._utilization, 70, 80)
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4