Add support for icon drivers. Add a driver for Font Awesome.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/appearance/classes.py

@@ -1,29 +1,39 @@
 from __future__ import unicode_literals
 
-from django.template import Template, Context
+from django.template import Context, Template
+
+
+class IconDriver(object):
+    _registry = {}
+
+    @classmethod
+    def get(cls, name):
+        return cls._registry[name]
+
+    @classmethod
+    def register(cls, driver_class):
+        cls._registry[driver_class.name] = driver_class
+
+
+class FontAwesomeDriver(IconDriver):
+    name = 'fontawesome'
+    template_text = '<i class="hidden-xs hidden-sm hidden-md fa fa-{{ symbol }}"></i>'
+
+    def __init__(self, symbol):
+        self.symbol = symbol
+
+    def render(self):
+        return Template(self.template_text).render(
+            context=Context({'symbol': self.symbol})
+        )
 
 
 class Icon(object):
-    templates = {
-        'classes': '<i class="hidden-xs hidden-sm hidden-md {{ classes }}"></i>',
-        'symbol': '<i class="hidden-xs hidden-sm hidden-md fa fa-{{ symbol }}"></i>'
-    }
+    def __init__(self, driver_name, **kwargs):
+        self.driver = IconDriver.get(name=driver_name)(**kwargs)
 
-    def __init__(self, classes=None, symbol=None):
-        self.classes = classes
-        self.symbol = symbol
+    def render(self, **kwargs):
+        return self.driver.render(**kwargs)
 
-        if self.classes:
-            self.template = self.templates['classes']
-        else:
-            self.template = self.templates['symbol']
 
-    def render(self):
-        return Template(self.template).render(
-            context=Context(
-                {
-                    'classes': self.classes,
-                    'symbol': self.symbol,
-                }
-            )
-        )
+IconDriver.register(driver_class=FontAwesomeDriver)