--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/hide_blockquote/hide_blockquote.php	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Quotation block hidding
+ *
+ * Plugin that adds a possibility to hide long blocks of cited text in messages.
+ *
+ * Configuration:
+ * // Minimum number of citation lines. Longer citation blocks will be hidden.
+ * // 0 - no limit (no hidding).
+ * $config['hide_blockquote_limit'] = 0;
+ *
+ * @license GNU GPLv3+
+ * @author Aleksander Machniak <alec@alec.pl>
+ */
+class hide_blockquote extends rcube_plugin
+{
+    public $task = 'mail|settings';
+
+    function init()
+    {
+        $rcmail = rcmail::get_instance();
+
+        if ($rcmail->task == 'mail'
+            && ($rcmail->action == 'preview' || $rcmail->action == 'show')
+            && ($limit = $rcmail->config->get('hide_blockquote_limit'))
+        ) {
+            // include styles
+            $this->include_stylesheet($this->local_skin_path() . "/style.css");
+
+            // Script and localization
+            $this->include_script('hide_blockquote.js');
+            $this->add_texts('localization', true);
+
+            // set env variable for client
+            $rcmail->output->set_env('blockquote_limit', $limit);
+        }
+        else if ($rcmail->task == 'settings') {
+            $dont_override = $rcmail->config->get('dont_override', array());
+            if (!in_array('hide_blockquote_limit', $dont_override)) {
+                $this->add_hook('preferences_list', array($this, 'prefs_table'));
+                $this->add_hook('preferences_save', array($this, 'save_prefs'));
+            }
+        }
+    }
+
+    function prefs_table($args)
+    {
+        if ($args['section'] != 'mailview') {
+            return $args;
+        }
+
+        $this->add_texts('localization');
+
+        $rcmail   = rcmail::get_instance();
+        $limit    = (int) $rcmail->config->get('hide_blockquote_limit');
+        $field_id = 'hide_blockquote_limit';
+        $input    = new html_inputfield(array('name' => '_'.$field_id, 'id' => $field_id, 'size' => 5));
+
+        $args['blocks']['main']['options']['hide_blockquote_limit'] = array(
+            'title'   => $this->gettext('quotelimit'),
+            'content' => $input->show($limit ?: '')
+        );
+
+        return $args;
+    }
+
+    function save_prefs($args)
+    {
+        if ($args['section'] == 'mailview') {
+            $args['prefs']['hide_blockquote_limit'] = (int) rcube_utils::get_input_value('_hide_blockquote_limit', rcube_utils::INPUT_POST);
+        }
+
+        return $args;
+    }
+
+}