Adds "needs_table_classe" config option

Fixes #305

docs/changelog.rst

@@ -24,6 +24,9 @@ License
   (`#342 <https://github.com/useblocks/sphinxcontrib-needs/issues/342>`_)
 * Improvement: Added option ``json_path`` for :ref:`needs_external_needs` to support external needs from local ``needs.json`` files.
   (`#339 <https://github.com/useblocks/sphinxcontrib-needs/issues/339>`_)
+* Improvement: Providing :ref:`needs_table_classes` to allow to set custom table css classes, to better support
+  themes like ReadTheDocs.
+  (`#305 <https://github.com/useblocks/sphinxcontrib-needs/issues/305>`_)
 
 0.7.1
 -----

docs/configuration.rst

@@ -1209,6 +1209,21 @@ keys:
             The related css class definition must be done by the user, e.g. by :ref:`own_css`.
             (*optional*) (*default*: ``external_link``)
 
+.. _needs_table_classes:
+
+needs_table_classes
+~~~~~~~~~~~~~~~~~~~
+.. versionadded:: 0.7.2
+
+Allows to define custom CSS classes, which get set for the HTML tables of  ``need`` and ``needtable``.
+This may be needed to avoid custom table handling of some specific Sphinx theme like ReadTheDocs.
+
+.. code-block:: rst
+
+   needs_table_classes = ['my_custom_class', 'another_class']
+
+Default: ``['rtd-exclude-wy-table']``
+
 
 .. _needs_builder_filter:
 

sphinxcontrib/needs/css/common.css

@@ -4,23 +4,6 @@ table.need td {
     white-space: normal;
 }
 
-/* Needed for RTD theme.
-Manipulates it for EVERY table, so also none sphinx-needs tables
-Another solution would be to use JS, to address only divs, which have a sphinx-needs table as child.*/
-div.wy-table-responsive {
-    overflow: unset;
-    margin-bottom: unset;
-}
- /* Bringing Head and content columns align*/
- /*solution from https://datatables.net/forums/discussion/comment/72586/#Comment_72586*/
-/*table.dataTable,*/
-/*table.dataTable  thead th,*/
-/*table.dataTable tbody td {*/
-/*  -webkit-box-sizing: content-box;*/
-/*  -moz-box-sizing: content-box;*/
-/*  box-sizing: content-box;*/
-/*}*/
-
 table.NEEDS_TABLE {
   display: block;
   overflow-x: auto;
@@ -44,6 +27,12 @@ table.need tr.footer div.line-block {
     margin-bottom: 0;
 }
 
+/* START CUSTOM ReadTheDocs theming css START */
+div.dataTables_scrollHeadInner > table.rtd-exclude-wy-table {
+    margin-bottom: 0px;
+}
+/* END CUSTOM ReadTheDocs theming css START */
+
 .toggle .header {
     display: block;
     clear: both;

sphinxcontrib/needs/directives/needtable.py

@@ -135,6 +135,8 @@ def process_needtables(app, doctree, fromdocname):
 
         # Prepare table
         classes = ["NEEDS_{style}".format(style=style)]
+        classes.extend(app.config.needs_table_classes)
+
         content = nodes.table(classes=classes)
         tgroup = nodes.tgroup()
 

sphinxcontrib/needs/layout.py

@@ -155,7 +155,9 @@ def __init__(self, app, need, layout, node, style=None, fromdocname=None):
         else:
             self.fromdocname = fromdocname
 
+        # For ReadTheDocs Theme we need to add 'rtd-exclude-wy-table'.
         classes = ["need", "needs_grid_" + self.layout["grid"], "needs_layout_" + self.layout_name]
+        classes.extend(app.config.needs_table_classes)
 
         self.style = style or self.need["style"] or getattr(self.app.config, "needs_default_style", None)
 

sphinxcontrib/needs/needs.py

@@ -208,6 +208,9 @@ def setup(app):
 
     app.add_config_value("needs_builder_filter", "is_external==False", "html", types=[str])
 
+    # Additional classes to set for needs and needtable.
+    app.add_config_value("needs_table_classes", ["rtd-exclude-wy-table"], "html", types=[list])
+
     # Define nodes
     app.add_node(Need, html=(html_visit, html_depart), latex=(latex_visit, latex_depart))
     app.add_node(