ITSSTOOLS/lib/scssphp/src/Formatter.php

<?php
/**
 * SCSSPHP
 *
 * @copyright 2012-2015 Leaf Corcoran
 *
 * @license http://opensource.org/licenses/MIT MIT
 *
 * @link http://leafo.github.io/scssphp
 */
namespace Leafo\ScssPhp;

use Leafo\ScssPhp\Formatter\OutputBlock;
/**
 * Base formatter
 *
 * @author Leaf Corcoran <leafot@gmail.com>
 */
abstract class Formatter
{
    /**
     * @var integer
     */
    public $indentLevel;
    /**
     * @var string
     */
    public $indentChar;
    /**
     * @var string
     */
    public $break;
    /**
     * @var string
     */
    public $open;
    /**
     * @var string
     */
    public $close;
    /**
     * @var string
     */
    public $tagSeparator;
    /**
     * @var string
     */
    public $assignSeparator;
    /**
     * @var boolea
     */
    public $keepSemicolons;
    /**
     * Initialize formatter
     *
     * @api
     */
    public abstract function __construct();
    /**
     * Return indentation (whitespace)
     *
     * @return string
     */
    protected function indentStr()
    {
        return '';
    }
    /**
     * Return property assignment
     *
     * @api
     *
     * @param string $name
     * @param mixed  $value
     *
     * @return string
     */
    public function property($name, $value)
    {
        return rtrim($name) . $this->assignSeparator . $value . ';';
    }
    /**
     * Strip semi-colon appended by property(); it's a separator, not a terminator
     *
     * @api
     *
     * @param array $lines
     */
    public function stripSemicolon(&$lines)
    {
        if ($this->keepSemicolons) {
            return;
        }
        if (($count = count($lines)) && substr($lines[$count - 1], -1) === ';') {
            $lines[$count - 1] = substr($lines[$count - 1], 0, -1);
        }
    }
    /**
     * Output lines inside a block
     *
     * @param \Leafo\ScssPhp\Formatter\OutputBlock $block
     */
    protected function blockLines(OutputBlock $block)
    {
        $inner = $this->indentStr();
        $glue = $this->break . $inner;
        echo $inner . implode($glue, $block->lines);
        if (!empty($block->children)) {
            echo $this->break;
        }
    }
    /**
     * Output block selectors
     *
     * @param \Leafo\ScssPhp\Formatter\OutputBlock $block
     */
    protected function blockSelectors(OutputBlock $block)
    {
        $inner = $this->indentStr();
        echo $inner . implode($this->tagSeparator, $block->selectors) . $this->open . $this->break;
    }
    /**
     * Output block children
     *
     * @param \Leafo\ScssPhp\Formatter\OutputBlock $block
     */
    protected function blockChildren(OutputBlock $block)
    {
        foreach ($block->children as $child) {
            $this->block($child);
        }
    }
    /**
     * Output non-empty block
     *
     * @param \Leafo\ScssPhp\Formatter\OutputBlock $block
     */
    protected function block(OutputBlock $block)
    {
        if (empty($block->lines) && empty($block->children)) {
            return;
        }
        $pre = $this->indentStr();
        if (!empty($block->selectors)) {
            $this->blockSelectors($block);
            $this->indentLevel++;
        }
        if (!empty($block->lines)) {
            $this->blockLines($block);
        }
        if (!empty($block->children)) {
            $this->blockChildren($block);
        }
        if (!empty($block->selectors)) {
            $this->indentLevel--;
            if (empty($block->children)) {
                echo $this->break;
            }
            echo $pre . $this->close . $this->break;
        }
    }
    /**
     * Entry point to formatting a block
     *
     * @api
     *
     * @param \Leafo\ScssPhp\Formatter\OutputBlock $block An abstract syntax tree
     *
     * @return string
     */
    public function format(OutputBlock $block)
    {
        ob_start();
        $this->block($block);
        $out = ob_get_clean();
        return $out;
    }
}