完善了分页的显示逻辑

Author: yangxueguang

blog/templates/blog/pagination.html

@@ -5,20 +5,34 @@
         </a>
     {% endif %}
 
+    {% if first_page == current_page %}
+        <span class="first-page current">1</span>
+    {% else %}
+        <a href="?page=1" class="first-page">1</a>
+    {% endif %}
+
+    {% if pages_first > 2 %}
+        <span>...</span>
+    {% endif %}
+
     {% for page in pages %}
-        {% if page  == 1 %}
-            {% if page == current_page %}
-                <span class="first-page current">{{ page }}</span>
-            {% else %}
-                <a href="?page={{ page }}" class="first-page">{{ page }}</a>
-            {% endif %}
-        {% elif page == current_page %}
+        {% if page == current_page %}
             <span class="current">{{ page }}</span>
         {% else %}
             <a href="?page={{ page }}">{{ page }}</a>
         {% endif %}
     {% endfor %}
 
+    {% if pages_last < last_page %}
+        <span>...</span>
+    {% endif %}
+
+    {% if last_page == current_page %}
+        <span class="current">{{ last_page }}</span>
+    {% else %}
+        <a href="?page={{ last_page }}">{{ last_page }}</a>
+    {% endif %}
+
     {% if article_list.has_next %}
         <a class="next-page" href="?page={{ article_list.next_page_number }}">
             下一页<span class="icon-next"></span>

blog/templatetags/paginate_tags.py

@@ -6,22 +6,49 @@
 
 @register.simple_tag(takes_context=True)
 def paginate(context, object_list, page_count):
+    left = 3
+    right = 3
+
     paginator = Paginator(object_list, page_count)
     page = context['request'].GET.get('page')
-    pages = [i + 1 for i in range(paginator.num_pages)]
 
     try:
         object_list = paginator.page(page)
         context['current_page'] = int(page)
+        pages = get_left(context['current_page'], left, paginator.num_pages) + get_right(context['current_page'], right,
+                                                                                         paginator.num_pages)
     except PageNotAnInteger:
         object_list = paginator.page(1)
         context['current_page'] = 1
+        pages = get_right(context['current_page'], right, paginator.num_pages)
     except EmptyPage:
         object_list = paginator.page(paginator.num_pages)
         context['current_page'] = paginator.num_pages
+        pages = get_left(context['current_page'], left, paginator.num_pages)
 
     context['article_list'] = object_list
-    context['paginator'] = paginator
     context['pages'] = pages
+    context['last_page'] = paginator.num_pages
+    context['first_page'] = 1
+    context['pages_first'] = pages[0]
+    context['pages_last'] = pages[-1] + 1
 
     return ''  # 必须加这个，否则首页会显示个None
+
+
+def get_left(current_page, left, num_pages):
+    if current_page == 1:
+        return []
+    elif current_page == num_pages:
+        l = [i - 1 for i in range(current_page, current_page - left, -1) if i - 1 > 1]
+        l.sort()
+        return l
+    l = [i for i in range(current_page, current_page - left, -1) if i > 1]
+    l.sort()
+    return l
+
+
+def get_right(current_page, right, num_pages):
+    if current_page == num_pages:
+        return []
+    return [i + 1 for i in range(current_page, current_page + right - 1) if i < num_pages - 1]