Add pagination rel-links to WUI header, related to issue Alfanous-tea…

…m#406

src/alfanous-django/templates/aya_results.html

@@ -10,6 +10,10 @@
   {% block pagination_phone %} {% endblock %}
 {% endkwacro %}
 
+{% block pagination_rel_block %}
+  {% include 'wui/pagination_rel.html' with page=results.search.interval.page nb_pages=results.search.interval.nb_pages %}
+{% endblock %}
+
 {% block results %}
 	<div id="#search_result_static" class="row span9 offset2  text-center ">
 

src/alfanous-django/templates/base.html

@@ -63,10 +63,10 @@
 	<link rel="alternate" href="http://www.alfanous.org{% url 'wui.views.results' current.unit  %}{% if current.request %}?{{ current.request }}{% endif %}" hreflang="{{ lang_code }}" />
                                 {% endlanguage %}
     {% endfor %}
-
+    {# todo:  restructure base.html with generic blocks that allows extending any part like header #}
+    {% block pagination_rel_block %}{% endblock %}
 	<link rel="search" type="application/opensearchdescription+xml" title="Alfanous" href="/static/alfanous-opensearch.xml"/>
 
-
 	<meta name="viewport" content="width=device-width, initial-scale=1.0">
 	<!-- Bootstrap -->
     {% ifequal bidi.direction "ltr" %}

src/alfanous-django/wui/templates/wui/pagination_rel.html

@@ -0,0 +1,17 @@
+{# @page: The number of current page #}
+{# @nb_pages: The total number of result pages #}
+
+{% load custom_filters %}
+{% load query %}
+
+{% if page != 1 %}
+  {% with page|add:"-1" as prev_page %}
+	<link rel="prev" href="?{% custom_query params.query prev_page False %}" />
+  {% endwith %}
+{% endif %}
+
+{% if page != nb_pages %}
+  {% with page|add:"+1" as next_page %}
+	<link rel="next" href="?{% custom_query params.query next_page False %}" />
+  {% endwith %}
+{% endif %}