<?php
/**
 * This file is part of PHPWord - A pure PHP library for reading and writing
 * word processing documents.
 *
 * PHPWord is free software distributed under the terms of the GNU Lesser
 * General Public License version 3 as published by the Free Software Foundation.
 *
 * For the full copyright and license information, please read the LICENSE
 * file that was distributed with this source code. For the full list of
 * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
 *
 * @link        https://github.com/PHPOffice/PHPWord
 * @copyright   2010-2014 PHPWord contributors
 * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
 */

namespace PhpOffice\PhpWord\Writer\HTML\Style;

use PhpOffice\PhpWord\Settings;

/**
 * Paragraph style HTML writer
 *
 * @since 0.10.0
 */
class Paragraph extends AbstractStyle
{
    /**
     * Write style
     *
     * @return string
     */
    public function write()
    {
        $style = $this->getStyle();
        if (!$style instanceof \PhpOffice\PhpWord\Style\Paragraph) {
            return '';
        }
        $css = array();

        // Alignment
        $align = $style->getAlign();
        $css['text-align'] = $this->getValueIf(!is_null($align), $align);

        // Spacing
        $spacing = $style->getSpace();
        if (!is_null($spacing)) {
            $before = $spacing->getBefore();
            $after = $spacing->getAfter();
            $css['margin-top'] = $this->getValueIf(!is_null($before), ($before / Settings::UNIT_POINT) . 'pt');
            $css['margin-bottom'] = $this->getValueIf(!is_null($after), ($after / Settings::UNIT_POINT) . 'pt');
        }

        return $this->assembleCss($css);
    }
}