From 54fd0a6738aed5d6446fba869992c5965db5d52c Mon Sep 17 00:00:00 2001
From: NoahY <yuttadhammo@yahoo.com>
Date: Wed, 27 Jul 2011 00:09:56 +0530
Subject: added tag cloud to sidebar

---
 askbot/skins/default/media/style/style.css         | 25 ++++++++
 .../skins/default/templates/main_page/sidebar.html | 17 ++---
 askbot/skins/default/templates/tags.html           | 14 ++--
 askbot/views/readers.py                            | 75 +++++++++++++---------
 4 files changed, 80 insertions(+), 51 deletions(-)

diff --git a/askbot/skins/default/media/style/style.css b/askbot/skins/default/media/style/style.css
index a0589d71..cfcc394e 100755
--- a/askbot/skins/default/media/style/style.css
+++ b/askbot/skins/default/media/style/style.css
@@ -374,6 +374,31 @@ blockquote {
    because it must be the same in the emails
    askbot/models/__init__.py:format_instant_notification_email()
 */
+
+/* tag cloud */
+
+.tag-size-1 {
+    font-size:12;
+}
+.tag-size-2 {
+    font-size:13;
+}
+.tag-size-3 {
+    font-size:14;
+}
+.tag-size-4 {
+    font-size:15;
+}
+.tag-size-5 {
+    font-size:16;
+}
+.tag-size-6 {
+    font-size:17;
+}
+.tag-size-7 {
+    font-size:18;
+}
+
 ul.tags,
 .boxC ul.tags,
 ul.tags.marked-tags,
diff --git a/askbot/skins/default/templates/main_page/sidebar.html b/askbot/skins/default/templates/main_page/sidebar.html
index 52d107af..c71b8c20 100644
--- a/askbot/skins/default/templates/main_page/sidebar.html
+++ b/askbot/skins/default/templates/main_page/sidebar.html
@@ -20,18 +20,11 @@
     {% cache 0 "tags" tags search_tags scope sort query context.page context.page_size language_code %}
     <div class="boxC">
         <h2>{% trans %}Related tags{% endtrans %}</h2>
-        <ul id="related-tags" class="tags">
-            {% for tag in tags %}
-                <li>
-                    {{ macros.tag_widget(
-                        tag.name,
-                        html_tag = 'div',
-                        extra_content = '<span class="tag-number">&#215; ' ~
-                            tag.local_used_count|intcomma ~ '</span>'
-                    )}}
-                </li>
-            {% endfor %}
-        </ul>
+        {% for tag in tags %}
+        <span class="tag-size-{{ font_size[tag.name] }}">
+            <a class="link-typeA" title="Number of entries: {{ tag.used_count }}" href="/blog/tags/all/{{ tag.name }}">{{ tag.name }}</a>
+        </span>
+        {% endfor %}
     </div>
     {% endcache %}
 {% endif %}
diff --git a/askbot/skins/default/templates/tags.html b/askbot/skins/default/templates/tags.html
index cec5639d..976d8f1d 100644
--- a/askbot/skins/default/templates/tags.html
+++ b/askbot/skins/default/templates/tags.html
@@ -21,23 +21,21 @@
         ><span>{% trans %}by popularity{% endtrans %}</span></a>
     </div>
 </div>
-<p>
+<p> 
     {% if stag %}
         {% trans %}All tags matching '<span class="darkred"><strong>{{ stag }}</strong></span>'{% endtrans %}:
     {% endif %}
-    {% if not tags.object_list %}
+    {% if not tags %}
         <span>{% trans %}Nothing found{% endtrans %}</span>
     {% endif %}
 </p>
-{% if tags.object_list %}
-    {% for tag in tags.object_list %}
-    <span style="font-size: {{ tag_font_size[tag] }}px;">
+{% if tags %}
+    {% for tag in tags %}
+    <span class="tag-size-{{ font_size[tag.name] }}">
         <a class="link-typeA" title="Number of entries: {{ tag.used_count }}" href="/blog/tags/all/{{ tag.name }}">{{ tag.name }}</a>
     </span>
+    {% endfor %}
 {% endif %}
-<div class="pager">
-    {{macros.paginator(paginator_context)}}
-</div>
 {% endblock %}
 {% block endjs %}
     <script type="text/javascript">
diff --git a/askbot/views/readers.py b/askbot/views/readers.py
index b5676a9a..9f7b9ceb 100644
--- a/askbot/views/readers.py
+++ b/askbot/views/readers.py
@@ -6,6 +6,7 @@ By main textual content is meant - text of Questions, Answers and Comments.
 The "read-only" requirement here is not 100% strict, as for example "question" view does
 allow adding new comments via Ajax form post.
 """
+import math
 import datetime
 import logging
 import urllib
@@ -90,7 +91,9 @@ def questions(request):
                                             request_user = request.user,
                                             search_state = search_state,
                                         )
-
+    
+    font_size = get_tag_font_size(tags)
+    
     paginator = Paginator(qs, search_state.page_size)
 
     if paginator.num_pages < search_state.page:
@@ -215,6 +218,7 @@ def questions(request):
                 'summary': question.summary,
                 'id': question.id,
                 'tags': question.get_tag_names(),
+                'font_size': font_size,
                 'votes': extra_filters.humanize_counter(question.score),
                 'votes_class': votes_class,
                 'votes_word': ungettext('vote', 'votes', question.score),
@@ -289,6 +293,7 @@ def questions(request):
         'sort': search_state.sort,
         'tab_id' : search_state.sort,
         'tags' : related_tags,
+        'font_size' : font_size,
         'tag_filter_strategy_choices': const.TAG_FILTER_STRATEGY_CHOICES,
     }
 
@@ -328,48 +333,56 @@ def tags(request):#view showing a listing of available tags - plain list
             else:
                 objects_list = Paginator(models.Tag.objects.all().filter(deleted=False).exclude(used_count=0).order_by("-used_count"), DEFAULT_PAGE_SIZE)
 
-    try:
-        tags = objects_list.page(page)
-    except (EmptyPage, InvalidPage):
-        tags = objects_list.page(objects_list.num_pages)
-    
-    #tag cloud params
-    max_tag = 0
-    for tag in tags.objects_list:
-        if tag.used_count > max_tag:
-            max_tag = tag.used_count
+    tags = models.Tag.objects.all().filter(deleted=False).exclude(used_count=0).order_by("name")
 
-    min_tag = max_tag
-    for tag in tags.objects_list:
-        if tag.used_count < min_tag:
-            min_tag = tag.used_count
+    font_size = get_tag_font_size(tags)
 
-    for tag in tags.objects_list:
-        font_size[tag] = tag_font_size(max_tag,min_tag,tag.used_count)
-    
-    paginator_data = {
-        'is_paginated' : is_paginated,
-        'pages': objects_list.num_pages,
-        'page': page,
-        'has_previous': tags.has_previous(),
-        'has_next': tags.has_next(),
-        'previous': tags.previous_page_number(),
-        'next': tags.next_page_number(),
-        'base_url' : reverse('tags') + '?sort=%s&amp;' % sortby
-    }
-    paginator_context = extra_tags.cnprog_paginator(paginator_data)
     data = {
         'active_tab': 'tags',
         'page_class': 'tags-page',
         'tags' : tags,
-        'tag_font_size' : tag_font_size,
+        'max' : max_tag,
+        'min' : min_tag,
+        'font_size' : font_size,
         'stag' : stag,
         'tab_id' : sortby,
         'keywords' : stag,
-        'paginator_context' : paginator_context
     }
+
     return render_into_skin('tags.html', data, request)
 
+def get_tag_font_size(tags):
+    max_tag = 0
+    for tag in tags:
+        if tag.used_count > max_tag:
+            max_tag = tag.used_count
+
+    min_tag = max_tag
+    for tag in tags:
+        if tag.used_count < min_tag:
+            min_tag = tag.used_count
+
+    font_size = {}
+    for tag in tags:
+        font_size[tag.name] = tag_font_size(max_tag,min_tag,tag.used_count)
+    
+    return font_size
+
+def tag_font_size(max_size, min_size, current_size):
+    """
+    do a logarithmic mapping calcuation for a proper size for tagging cloud
+    Algorithm from http://blogs.dekoh.com/dev/2007/10/29/choosing-a-good-
+    font-size-variation-algorithm-for-your-tag-cloud/
+    """
+    MAX_FONTSIZE = 7
+    MIN_FONTSIZE = 1
+
+    #avoid invalid calculation
+    if current_size == 0:
+        current_size = 1
+    weight = (math.log10(current_size) - math.log10(min_size)) / (math.log10(max_size) - math.log10(min_size))
+    return MIN_FONTSIZE + round((MAX_FONTSIZE - MIN_FONTSIZE) * weight)
+
 @csrf.csrf_protect
 def question(request, id):#refactor - long subroutine. display question body, answers and comments
     """view that displays body of the question and 
-- 
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