Theme option fo deactivating table handling

Allows the user to define table classes, which
deactivates the complete table handling
by sphinx-material for this specific table.

* Adds table_no_strip to theme.conf
* Sets default value to no-sphinx-material-strip
* Adds docs on customization page

Fixes #119

docs/customization.rst

@@ -103,7 +103,10 @@ Configuration Options
 ``table_classes``
    A list of classes to **not strip** from tables. All other classes are stripped, and the default
    table has no class attribute. Custom table classes need to provide the full style for the table.
-
+``table_no_strip``
+   A list of classes to deactivate the complete table handling by sphinx-material for this specific table,
+   so that all set table classes are kept.
+   Default value: ``no-sphinx-material-strip``.
 Sidebars
 ========
 

sphinx_material/__init__.py

@@ -22,6 +22,7 @@
 ROOT_SUFFIX = "--page-root"
 
 USER_TABLE_CLASSES = []
+USER_TABLE_NO_STRIP_CLASSES = ["no-sphinx-material-strip"]
 
 
 def setup(app):
@@ -150,6 +151,10 @@ def update_table_classes(app, config):
     if table_classes:
         USER_TABLE_CLASSES.extend(table_classes)
 
+    table_no_strip_classes = config.html_theme_options.get("table_no_strip")
+    if table_no_strip_classes:
+        USER_TABLE_NO_STRIP_CLASSES.extend(table_no_strip_classes)
+
 
 def html_theme_path():
     return [os.path.dirname(os.path.abspath(__file__))]
@@ -228,7 +233,9 @@ def walk_contents(tags):
 
 def table_fix(body_text, page_name="md-page-root--link"):
     # This is a hack to skip certain classes of tables
-    ignore_table_classes = {"highlighttable", "longtable", "dataframe"}
+    ignore_table_classes = {"highlighttable", "longtable", "dataframe"} | set(
+        USER_TABLE_NO_STRIP_CLASSES
+    )
     try:
         body = BeautifulSoup(body_text, features="html.parser")
         for table in body.select("table"):

sphinx_material/sphinx_material/theme.conf

@@ -109,4 +109,9 @@ version_json = "versions.json"
 # Table classes to _not_ strip.  Must be a list. Classes on this list are *not*
 # removed from tables. All other classes are removed, and only tables with outclasses
 # are styled by default.
-table_classes =
+table_classes =
+
+# Table classes, which deactivates the overall class striping. If one of the configured
+# classes is set, **all** table classes are kept.
+# This is different to "table_classes", which only keeps the configured classes.
+table_no_strip =