Generate sub and sup elements for subscript and superscript text

2 files changed, 26 insertions, 0 deletions

diff --git a/mammoth/conversion.py b/mammoth/conversion.py
index 0a91a1d..9eaa3d2 100644
--- a/mammoth/conversion.py
+++ b/mammoth/conversion.py
@@ -85,6 +85,10 @@ class DocumentConverter(object):
             run_generator.start("strong")
         if run.is_italic:
             run_generator.start("em")
+        if run.vertical_alignment == documents.VerticalAlignment.superscript:
+            run_generator.start("sup")
+        if run.vertical_alignment == documents.VerticalAlignment.subscript:
+            run_generator.start("sub")
         if run.is_underline and self._convert_underline is not None:
             self._convert_underline(run_generator)
         self._convert_elements_to_html(run.children, run_generator)
diff --git a/tests/conversion_tests.py b/tests/conversion_tests.py
index d9dde3e..246671d 100644
--- a/tests/conversion_tests.py
+++ b/tests/conversion_tests.py
@@ -166,6 +166,28 @@ def underline_runs_can_be_wrapped_in_tags():
     )
     assert_equal("<u>Hello</u>", result.value)
     
+
+@istest
+def superscript_runs_are_wrapped_in_sup_tags():
+    result = convert_document_element_to_html(
+        documents.run(
+            children=[documents.text("Hello")],
+            vertical_alignment=documents.VerticalAlignment.superscript,
+        ),
+    )
+    assert_equal("<sup>Hello</sup>", result.value)
+    
+
+@istest
+def subscript_runs_are_wrapped_in_sub_tags():
+    result = convert_document_element_to_html(
+        documents.run(
+            children=[documents.text("Hello")],
+            vertical_alignment=documents.VerticalAlignment.subscript,
+        ),
+    )
+    assert_equal("<sub>Hello</sub>", result.value)
+    
     
 @istest
 def runs_are_converted_by_satisfying_matching_paths():