Isolate gallery images from other post types and Media library?

I have nothing planned like this.

I managed to isolate the gallery images from the Media Library using a wordpress core filter.
(using WordPress 3.5.1, plugin version 0.1.2)

See the code bellow. Can you help me to point out how can I isolate the folder images from the insert media popup box?
I’m new in that one, and I’m sure without help I can figure out in a few days, but though you could give me some hints.

// Isolate gallery images from Media Library

if ( is_admin() && is_plugin_active('eazyest-gallery/eazyest-gallery.php') ) {

    /**kli map wp
     * Count number of attachments for the mime type(s).
     *
     * If you set the optional mime_type parameter, then an array will still be
     * returned, but will only have the item you are looking for. It does not give
     * you the number of attachments that are children of a post. You can get that
     * by counting the number of children that post has.
     *
     * @since 2.5.0
     *
     * @param string|array $mime_type Optional. Array or comma-separated list of MIME patterns.
     * @return array Number of posts for each mime type.
     */

    function kli_ezg_wp_count_attachments( $mime_type = '' ) {
        global $wpdb;

        $and = wp_post_mime_type_where( $mime_type );

        /*kli
        * Exclude some media items
        * - append to $and
        */
        $attachment_base_url = eazyest_gallery()->address();
        $and .= " AND $wpdb->posts.guid NOT LIKE '{$attachment_base_url}%'";

        $count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );

        $stats = array();
        foreach( (array) $count as $row ) {
            $stats[$row['post_mime_type']] = $row['num_posts'];
        }
        $stats['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and");

        return (object) $stats;
    }

    /**kli map wp
     * Display the list of views available on this table.
     *
     * @since 3.1.0
     * @access public
     */
    function kli_ezg_get_views() {
        global $wpdb, $post_mime_types, $avail_post_mime_types;

        $type_links = array();
        $_num_posts = (array) kli_ezg_wp_count_attachments();

        $_total_posts = array_sum($_num_posts) - $_num_posts['trash'];

        if ( !isset( $total_orphans ) )
                $total_orphans = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' AND post_parent < 1" );
        $matches = wp_match_mime_types(array_keys($post_mime_types), array_keys($_num_posts));
        foreach ( $matches as $type => $reals )
            foreach ( $reals as $real )
                $num_posts[$type] = ( isset( $num_posts[$type] ) ) ? $num_posts[$type] + $_num_posts[$real] : $_num_posts[$real];

        //*kli map
        $this_detached = isset( $_REQUEST['detached'] ) || isset( $_REQUEST['find_detached'] );
        // $class = ( empty($_GET['post_mime_type']) && !$this->detached && !isset($_GET['status']) ) ? ' class="current"' : '';
        $class = ( empty($_GET['post_mime_type']) && !$this_detached && !isset($_GET['status']) ) ? ' class="current"' : '';

        $type_links['all'] = "<a href='upload.php'$class>" . sprintf( _nx( 'All <span class="count">(%s)</span>', 'All <span class="count">(%s)</span>', $_total_posts, 'uploaded files' ), number_format_i18n( $_total_posts ) ) . '</a>';

        foreach ( $post_mime_types as $mime_type => $label ) {
            $class = '';

            if ( !wp_match_mime_types($mime_type, $avail_post_mime_types) )
                continue;

            if ( !empty($_GET['post_mime_type']) && wp_match_mime_types($mime_type, $_GET['post_mime_type']) )
                $class = ' class="current"';
            if ( !empty( $num_posts[$mime_type] ) )
                $type_links[$mime_type] = "<a href='upload.php?post_mime_type=$mime_type'$class>" . sprintf( translate_nooped_plural( $label[2], $num_posts[$mime_type] ), number_format_i18n( $num_posts[$mime_type] )) . '</a>';
        }
        $type_links['detached'] = '<a href="upload.php?detached=1"' . ( $this_detached ? ' class="current"' : '' ) . '>' . sprintf( _nx( 'Unattached <span class="count">(%s)</span>', 'Unattached <span class="count">(%s)</span>', $total_orphans, 'detached files' ), number_format_i18n( $total_orphans ) ) . '</a>';

        if ( !empty($_num_posts['trash']) )
            $type_links['trash'] = '<a href="upload.php?status=trash"' . ( (isset($_GET['status']) && $_GET['status'] == 'trash' ) ? ' class="current"' : '') . '>' . sprintf( _nx( 'Trash <span class="count">(%s)</span>', 'Trash <span class="count">(%s)</span>', $_num_posts['trash'], 'uploaded files' ), number_format_i18n( $_num_posts['trash'] ) ) . '</a>';

        return $type_links;
    }

    // Update wp_query for Media Library
    // - in kli_ezg_medialibrary_exclude
    function kli_ezg_medialibrary_exclude_wp_query( $content ) {
        global $wpdb;

        $attachment_base_url = eazyest_gallery()->address();
        $content .= " AND $wpdb->posts.guid NOT LIKE '{$attachment_base_url}%'";

        return $content;
    }

    // Exclude some media items from Media Library
    function kli_ezg_medialibrary_exclude( $input ) {
        add_filter( 'posts_where_paged', 'kli_ezg_medialibrary_exclude_wp_query' );
        add_filter( 'views_upload', 'kli_ezg_get_views' );
        return $input;
    }
    add_filter( 'upload_per_page', 'kli_ezg_medialibrary_exclude' );

}// if plugin active

Here is the code to not show Eazyest Gallery items in Media Popup for other post types.

ps: looks like the plugin already doing something similar, because only sharing the gallery images with the POST custom post type.

/** Exclude Eazyest Gallery from Media Popup when not in folders
     *
     */
    function kli_ezg_mediapopup_exclude() {
        if ( ! eazyest_folderbase()->refered_by_folder() )
            add_filter( 'posts_where_paged', 'kli_ezg_medialibrary_exclude_wp_query', 1 );
    }
    add_action( 'wp_ajax_query-attachments', 'kli_ezg_mediapopup_exclude', 1 );

From here, it would be easy to create an isolation option.

There is one more thing to do –

Un-Attached counter shows the number of eazyest gallery zomby attachments.

WordPress 3.7 have new filters to use:
ajax_query_attachments_args – https://core.trac.www.ads-software.com/ticket/24285
count_posts – https://core.trac.www.ads-software.com/changeset/25554