LAW-6611 | Add ability to remove attr value

src/html_presets_processor.py

@@ -16,7 +16,7 @@ class HtmlPresetsProcessor:
             "table_wrapper": self._process_tag_using_table,
             "decomposer": self._decompose_tag,
             "replacer": self._replace_tag,
-            "attr_remover": self._remove_attrs,
+            "attr_remover": self._remove_attr,
             "attr_replacer": self._replace_attr,
             "unwrapper": self._unwrap_tag,
             "inserter": self._insert_tag,
@@ -155,8 +155,20 @@ class HtmlPresetsProcessor:
             kwargs["found_tag"].attrs = dict_attributes
 
     @staticmethod
-    def _remove_attrs(**kwargs):
-        kwargs["found_tag"].attrs = {}
+    def _remove_attr(**kwargs):
+        """Deletes an attribute or part of an attribute value from an HTML tag"""
+        for attr in kwargs["rule"]["condition"]["attrs"]:
+            attr_name, attr_value = \
+                attr["name"], attr["value"]
+            if attr["value"] is None:
+                # delete entire attribute
+                del kwargs["found_tag"].attrs[attr_name]
+            else:
+                # delete part of attribute value
+                pattern = rf"{attr_value}:\s*[0-9.-]+[a-z%]*;*"
+                attr_string = str(kwargs["found_tag"][attr_name])
+                new_value = re.sub(pattern, "", attr_string)
+                kwargs["found_tag"][attr_name] = new_value
 
     @staticmethod
     def _replace_attr(**kwargs):