Tiny-Tiny-RSS plugin which removes images from the content of articles

no_images_init.php

<?php
/*
 * Copyright 2014 James Geboski <jgeboski@gmail.com>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * This Tiny-Tiny-RSS plugin removes images from the content of
 * articles, and strips out any left over elements related to the
 * images.
 *
 * Installing:
 *   1. Move this file to <tt-rss-root>/plugins/no_images/init.php
 *   2. Enable via the prefernces interface
 */

class No_Images extends Plugin
{
    private $host;

    public function about()
    {
        return array(1.0, 'Remove embedded images', 'jgeboski', false);
    }

    public function api_version()
    {
        return 2;
    }

    public function init($host)
    {
        $this->host = $host;
        $host->add_hook($host::HOOK_FORMAT_ENCLOSURES, $this);
        $host->add_hook($host::HOOK_SANITIZE,          $this);
    }

    public function hook_format_enclosures($rv, $result, $id,
                                           $always_display_enclosures,
                                           $article_content, $hide_images)
    {
        /* Disable attachments (no sane MIME calls in PHP) */
        return array('', array());
    }

    public function hook_sanitize($doc, $site_url, $allowed_elements,
                                  $disallowed_attributes, $article_id)
    {
        $xpath = new DOMXpath($doc);
        $nodes = $xpath->query('//img');
        $full  = array('img');

        foreach ($nodes as $node) {
            $ops = array(
                'nextSibling'     => NULL,
                'previousSibling' => NULL,
                'parentNode'      => NULL
            );

            foreach ($ops as $op => $n) {
                $ops[$op] = $this->getElement($node, $op);
            }

            $node->parentNode->removeChild($node);

            foreach ($ops as $op => $n) {
                while (($n != NULL) && $this->isElementEmpty($n, $full)) {
                    $s = $this->getElement($n, $op);
                    $n->parentNode->removeChild($n);
                    $n = $s;
                }
            }
        }

        return array($doc, $allowed_elements, $disallowed_attributes);
    }

    private function isElementEmpty($node, $full = array())
    {
        if ($node->nodeType != XML_ELEMENT_NODE) {
            return false;
        }

        $name = strtolower($node->nodeName);

        if (in_array($name, $full)) {
            return false;
        }

        foreach ($node->childNodes as $c) {
            if ($node->nodeType != XML_ELEMENT_NODE) {
                continue;
            }

            if (!$this->isElementEmpty($c, $full)) {
                return false;
            }
        }

        $val = html_entity_decode($node->nodeValue);
        return preg_match('/^\s*$/', $val) == 1;
    }

    private function getElement($node, $op)
    {
        for ($n = $node->$op; $n != NULL; $n = $n->$op) {
            if ($n->nodeType == XML_ELEMENT_NODE) {
                return $n;
            }
        }

        return NULL;
    }
}
?>

Hi,
May you please add possibility to activate this for a certain feed?