57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
import copy
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from django.forms.util import flatatt
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class HTMLElement(object):
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""" A generic base class that gracefully handles html-style attributes. """
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def __init__(self):
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self.attrs = getattr(self, "attrs", {})
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self.classes = getattr(self, "classes", [])
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def get_default_classes(self):
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"""
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Returns an iterable of default classes which should be combined with
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any other declared classes.
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"""
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return []
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def get_default_attrs(self):
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"""
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Returns a dict of default attributes which should be combined with
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other declared attributes.
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"""
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return {}
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def get_final_attrs(self):
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"""
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Returns a dict containing the final attributes of this element
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which will be rendered.
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"""
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final_attrs = copy.copy(self.get_default_attrs())
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final_attrs.update(self.attrs)
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# Handle css class concatenation
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default = " ".join(self.get_default_classes())
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defined = self.attrs.get('class', '')
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additional = " ".join(getattr(self, "classes", []))
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non_empty = [test for test in (defined, default, additional) if test]
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final_classes = " ".join(non_empty).strip()
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final_attrs.update({'class': final_classes})
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return final_attrs
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@property
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def attr_string(self):
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"""
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Returns a flattened string of HTML attributes based on the
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``attrs`` dict provided to the class.
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"""
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return flatatt(self.get_final_attrs())
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@property
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def class_string(self):
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"""
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Returns a list of class name of HTML Element in string
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"""
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classes_str = " ".join(self.classes)
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return classes_str
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