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[prawokultury.git] / prawokultury / templatetags / prevnext.py

diff --git a/prawokultury/templatetags/prevnext.py b/prawokultury/templatetags/prevnext.py
new file mode 100755 (executable)
index 0000000..ec067e7
--- /dev/null
+++ b/prawokultury/templatetags/prevnext.py
@@ -0,0 +1,27 @@
+from django.template import Library
+
+register = Library()
+
+
+@register.inclusion_tag('prevnext/previous.html', takes_context=True)
+def previous_page(context, fallback=None, fallback_title=None):
+    current = context['page_obj'].number
+    if current > 1:
+        return {'number': current - 1, 'title': None, 'url': None}
+    else:
+        return {'number': None, 'title': fallback_title, 'url': fallback}
+
+
+@register.inclusion_tag('prevnext/next.html', takes_context=True)
+def next_page(context, fallback=None, fallback_title=None):
+    current = context['page_obj'].number
+    page_range = context['paginator'].page_range
+    if current < page_range[-1]:
+        return {'number': current + 1, 'title': None, 'url': None}
+    else:
+        return {'number': None, 'title': fallback_title, 'url': fallback}
+
+
+@register.inclusion_tag('prevnext/prevnext.html', takes_context=True)
+def prevnext(context):
+    return context