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<?php
/*
Question2Answer (c) Gideon Greenspan
http://www.question2answer.org/
File: qa-plugin/tag-cloud-widget/qa-tag-cloud.php
Version: See define()s at top of qa-include/qa-base.php
Description: Widget module class for tag cloud plugin
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
More about this license: http://www.question2answer.org/license.php
*/
class qa_tag_cloud {
function option_default($option)
{
if ($option=='tag_cloud_count_tags')
return 100;
elseif ($option=='tag_cloud_font_size')
return 24;
elseif ($option=='tag_cloud_size_popular')
return true;
}
function admin_form()
{
$saved=false;
if (qa_clicked('tag_cloud_save_button')) {
qa_opt('tag_cloud_count_tags', (int)qa_post_text('tag_cloud_count_tags_field'));
qa_opt('tag_cloud_font_size', (int)qa_post_text('tag_cloud_font_size_field'));
qa_opt('tag_cloud_size_popular', (int)qa_post_text('tag_cloud_size_popular_field'));
$saved=true;
}
return array(
'ok' => $saved ? 'Tag cloud settings saved' : null,
'fields' => array(
array(
'label' => 'Maximum tags to show:',
'type' => 'number',
'value' => (int)qa_opt('tag_cloud_count_tags'),
'suffix' => 'tags',
'tags' => 'name="tag_cloud_count_tags_field"',
),
array(
'label' => 'Starting font size:',
'suffix' => 'pixels',
'type' => 'number',
'value' => (int)qa_opt('tag_cloud_font_size'),
'tags' => 'name="tag_cloud_font_size_field"',
),
array(
'label' => 'Font size represents tag popularity',
'type' => 'checkbox',
'value' => qa_opt('tag_cloud_size_popular'),
'tags' => 'name="tag_cloud_size_popular_field"',
),
),
'buttons' => array(
array(
'label' => 'Save Changes',
'tags' => 'name="tag_cloud_save_button"',
),
),
);
}
function allow_template($template)
{
$allow=false;
switch ($template)
{
case 'activity':
case 'qa':
case 'questions':
case 'hot':
case 'ask':
case 'categories':
case 'question':
case 'tag':
case 'tags':
case 'unanswered':
case 'user':
case 'users':
case 'search':
case 'admin':
case 'custom':
$allow=true;
break;
}
return $allow;
}
function allow_region($region)
{
return ($region=='side');
}
function output_widget($region, $place, $themeobject, $template, $request, $qa_content)
{
require_once QA_INCLUDE_DIR.'qa-db-selects.php';
$populartags=qa_db_single_select(qa_db_popular_tags_selectspec(0, (int)qa_opt('tag_cloud_count_tags')));
reset($populartags);
$maxcount=current($populartags);
$themeobject->output(
'<h2 style="margin-top:0; padding-top:0;">',
qa_lang_html('main/popular_tags'),
'</h2>'
);
$themeobject->output('<div style="font-size:10px;">');
$maxsize=qa_opt('tag_cloud_font_size');
$scale=qa_opt('tag_cloud_size_popular');
$blockwordspreg=qa_get_block_words_preg();
foreach ($populartags as $tag => $count) {
if (count(qa_block_words_match_all($tag, $blockwordspreg)))
continue; // skip censored tags
$size=number_format(($scale ? ($maxsize*$count/$maxcount) : $maxsize), 1);
if (($size>=5) || !$scale)
$themeobject->output('<a href="'.qa_path_html('tag/'.$tag).'" style="font-size:'.$size.'px; vertical-align:baseline;">'.qa_html($tag).'</a>');
}
$themeobject->output('</div>');
}
}
/*
Omit PHP closing tag to help avoid accidental output
*/