handle i3status 'short_text'.

simple way to transform with settings a 'max_size' globally for all module or per module.
short_text is used if returned text size is larger than monitor.

py3status/core.py

@@ -932,13 +932,21 @@ def create_mappings(self, config):
             if hasattr(color, "none_setting"):
                 color = None
             mappings[name] = color
+
+            max_size = self.get_config_attribute(name, 'max_size')
+            if hasattr(max_size, 'none_setting'):
+                max_size = None
+            mappings[name] = max_size
+
         # Store mappings for later use.
+        self.mappings_max_size = mappings
         self.mappings_color = mappings
 
     def process_module_output(self, module):
         """
         Process the output for a module and return a json string representing it.
         Color processing occurs here.
+        Shortened text 'short_text' processing occurs here.
         """
         outputs = module["module"].get_latest()
         color = module["color"]

py3status/module.py

@@ -659,6 +659,15 @@ def deprecation_log(item):
                 param = True
             self.allow_urgent = param
 
+            # max_size
+            # get the value form the config or use the module default if
+            # supplied.
+            fn = self._py3_wrapper.get_config_attribute
+            param = fn(self.module_full_name, 'max_size')
+            if hasattr(param, 'none_setting'):
+                param = True
+            self.max_size = param
+
             # get the available methods for execution
             for method in sorted(dir(class_inst)):
                 if method.startswith("_"):