<?php
/**
 * Bootstrap Wrapper Plugin: Affix
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Giuseppe Di Terlizzi <giuseppe.diterlizzi@gmail.com>
 * @copyright  (C) 2015-2020, Giuseppe Di Terlizzi
 */

class syntax_plugin_bootswrapper_affix extends syntax_plugin_bootswrapper_bootstrap
{
    public $p_type         = 'block';
    public $pattern_start  = '<affix.*?>(?=.*?</affix>)';
    public $pattern_end    = '</affix>';
    public $tag_name       = 'affix';
    public $tag_attributes = array(

        'offset-top'      => array(
            'type'     => 'integer',
            'values'   => null,
            'required' => false,
            'default'  => null),

        'offset-bottom'   => array(
            'type'     => 'integer',
            'values'   => null,
            'required' => false,
            'default'  => null),

        'target'          => array(
            'type'     => 'string',
            'values'   => null,
            'required' => false,
            'default'  => null),

        'position'        => array(
            'type'     => 'string',
            'values'   => array('fixed', 'absolute'),
            'required' => false,
            'default'  => 'fixed'),

        'position-top'    => array(
            'type'     => 'string',
            'values'   => null,
            'required' => false,
            'default'  => null),

        'position-bottom' => array(
            'type'     => 'string',
            'values'   => null,
            'required' => false,
            'default'  => null),

        'position-left'   => array(
            'type'     => 'string',
            'values'   => null,
            'required' => false,
            'default'  => null),

        'position-right'  => array(
            'type'     => 'string',
            'values'   => null,
            'required' => false,
            'default'  => null),
    );

    public function render($mode, Doku_Renderer $renderer, $data)
    {

        if (empty($data)) {
            return false;
        }

        if ($mode !== 'xhtml') {
            return false;
        }

        /** @var Doku_Renderer_xhtml $renderer */
        list($state, $match, $pos, $attributes) = $data;

        if ($state == DOKU_LEXER_ENTER) {
            $top             = $attributes['offset-top'];
            $bottom          = $attributes['offset-bottom'];
            $target          = $attributes['target'];
            $position        = $attributes['position'];
            $position_top    = $attributes['position-top'];
            $position_bottom = $attributes['position-bottom'];
            $position_right  = $attributes['position-right'];
            $position_left   = $attributes['position-left'];

            $html5_data = array();
            $styles     = array();

            if ($position === 'fixed') {
                $position = null;
            }

            if ($position_top && (!strstr($position_top, 'px')
                && !strstr($position_top, 'em')
                && !strstr($position_top, '%'))) {
                $position_top = "{$position_top}px";
            }

            if ($position_bottom && (!strstr($position_bottom, 'px')
                && !strstr($position_bottom, 'em')
                && !strstr($position_bottom, '%'))) {
                $position_bottom = "{$position_bottom}px";
            }

            if ($position_right && (!strstr($position_right, 'px')
                && !strstr($position_right, 'em')
                && !strstr($position_right, '%'))) {
                $position_right = "{$position_right}px";
            }

            if ($position_left && (!strstr($position_left, 'px')
                && !strstr($position_left, 'em')
                && !strstr($position_left, '%'))) {
                $position_left = "{$position_left}px";
            }

            if ($top) {
                $html5_data[] = "data-offset-top=$top ";
            }

            if ($bottom) {
                $html5_data[] = "data-offset-bottom=$bottom ";
            }

            if ($target) {
                $html5_data[] = 'data-target="' . $target . '"';
            }

            if ($position) {
                $styles[] = "position:$position";
            }

            if ($position_top) {
                $styles[] = "top:$position_top";
            }

            if ($position_bottom) {
                $styles[] = "bottom:$position_bottom";
            }

            if ($position_left) {
                $styles[] = "left:$position_left";
            }

            if ($position_right) {
                $styles[] = "right:$position_right";
            }

            $markup = '<div style="z-index:1024;' . implode(';', $styles) . '" class="bs-wrap bs-wrap-affix" data-spy="affix" ' . implode(' ', $html5_data) . '>';

            $renderer->doc .= $markup;
            return true;
        }

        if ($state == DOKU_LEXER_EXIT) {
            $renderer->doc .= '</div>';
            return true;
        }

        return true;
    }
}