hdr: add Settings.odd_and_even_pages_head.. setter

Add some namespace-prefix mappings that arise for the first time in
headers.

Author: scanny

docx/oxml/ns.py

@@ -8,22 +8,21 @@
 
 
 nsmap = {
-    'a':   ('http://schemas.openxmlformats.org/drawingml/2006/main'),
-    'c':   ('http://schemas.openxmlformats.org/drawingml/2006/chart'),
-    'cp':  ('http://schemas.openxmlformats.org/package/2006/metadata/core-pr'
-            'operties'),
-    'dc':  ('http://purl.org/dc/elements/1.1/'),
-    'dcmitype': ('http://purl.org/dc/dcmitype/'),
-    'dcterms':  ('http://purl.org/dc/terms/'),
-    'dgm': ('http://schemas.openxmlformats.org/drawingml/2006/diagram'),
-    'pic': ('http://schemas.openxmlformats.org/drawingml/2006/picture'),
-    'r':   ('http://schemas.openxmlformats.org/officeDocument/2006/relations'
-            'hips'),
-    'w':   ('http://schemas.openxmlformats.org/wordprocessingml/2006/main'),
-    'wp':  ('http://schemas.openxmlformats.org/drawingml/2006/wordprocessing'
-            'Drawing'),
-    'xml': ('http://www.w3.org/XML/1998/namespace'),
-    'xsi': ('http://www.w3.org/2001/XMLSchema-instance'),
+    "a": ("http://schemas.openxmlformats.org/drawingml/2006/main"),
+    "c": ("http://schemas.openxmlformats.org/drawingml/2006/chart"),
+    "cp": ("http://schemas.openxmlformats.org/package/2006/metadata/core-properties"),
+    "dc": ("http://purl.org/dc/elements/1.1/"),
+    "dcmitype": ("http://purl.org/dc/dcmitype/"),
+    "dcterms": ("http://purl.org/dc/terms/"),
+    "dgm": ("http://schemas.openxmlformats.org/drawingml/2006/diagram"),
+    "m": ("http://schemas.openxmlformats.org/officeDocument/2006/math"),
+    "pic": ("http://schemas.openxmlformats.org/drawingml/2006/picture"),
+    "r": ("http://schemas.openxmlformats.org/officeDocument/2006/relationships"),
+    "sl": ("http://schemas.openxmlformats.org/schemaLibrary/2006/main"),
+    "w": ("http://schemas.openxmlformats.org/wordprocessingml/2006/main"),
+    "wp": ("http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing"),
+    "xml": ("http://www.w3.org/XML/1998/namespace"),
+    "xsi": ("http://www.w3.org/2001/XMLSchema-instance"),
 }
 
 pfxmap = dict((value, key) for key, value in nsmap.items())

docx/oxml/settings.py

@@ -55,3 +55,10 @@ def evenAndOddHeaders_val(self):
         if evenAndOddHeaders is None:
             return False
         return evenAndOddHeaders.val
+
+    @evenAndOddHeaders_val.setter
+    def evenAndOddHeaders_val(self, value):
+        if value in [None, False]:
+            self._remove_evenAndOddHeaders()
+        else:
+            self.get_or_add_evenAndOddHeaders().val = value

docx/settings.py

@@ -22,3 +22,7 @@ def odd_and_even_pages_header_footer(self):
         Read/write.
         """
         return self._element.evenAndOddHeaders_val
+
+    @odd_and_even_pages_header_footer.setter
+    def odd_and_even_pages_header_footer(self, value):
+        self._element.evenAndOddHeaders_val = value

features/doc-settings.feature

@@ -25,7 +25,6 @@ Feature: Document.settings
       | without         | False |
 
 
-  @wip
   Scenario Outline: Settings.odd_and_even_pages_header_footer setter
     Given a Settings object <with-or-without> odd and even page headers as settings
      When I assign <value> to settings.odd_and_even_pages_header_footer

tests/test_settings.py

@@ -8,7 +8,7 @@
 
 from docx.settings import Settings
 
-from .unitutil.cxml import element
+from .unitutil.cxml import element, xml
 
 
 class DescribeSettings(object):
@@ -23,6 +23,16 @@ def it_knows_when_the_document_has_distinct_odd_and_even_headers(
 
         assert odd_and_even_pages_header_footer is expected_value
 
+    def it_can_change_whether_the_document_has_distinct_odd_and_even_headers(
+        self, odd_and_even_set_fixture
+    ):
+        settings_elm, value, expected_xml = odd_and_even_set_fixture
+        settings = Settings(settings_elm)
+
+        settings.odd_and_even_pages_header_footer = value
+
+        assert settings_elm.xml == expected_xml
+
     # fixtures -------------------------------------------------------
 
     @pytest.fixture(
@@ -38,3 +48,21 @@ def odd_and_even_get_fixture(self, request):
         settings_cxml, expected_value = request.param
         settings_elm = element(settings_cxml)
         return settings_elm, expected_value
+
+    @pytest.fixture(
+        params=[
+            ("w:settings", True, "w:settings/w:evenAndOddHeaders"),
+            ("w:settings/w:evenAndOddHeaders", False, "w:settings"),
+            (
+                "w:settings/w:evenAndOddHeaders{w:val=1}",
+                True,
+                "w:settings/w:evenAndOddHeaders"
+            ),
+            ("w:settings/w:evenAndOddHeaders{w:val=off}", False, "w:settings"),
+        ]
+    )
+    def odd_and_even_set_fixture(self, request):
+        settings_cxml, value, expected_cxml = request.param
+        settings_elm = element(settings_cxml)
+        expected_xml = xml(expected_cxml)
+        return settings_elm, value, expected_xml