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<?php
/**
* SCSSPHP
*
* @copyright 2012-2015 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://leafo.github.io/scssphp
*/
namespace Leafo\ScssPhp;
/**
* SCSS 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;
abstract public function __construct();
/**
* Return indentation (whitespace)
*
* @param integer $n
*
* @return string
*/
protected function indentStr($n = 0)
{
return str_repeat($this->indentChar, max($this->indentLevel + $n, 0));
}
/**
* Return property assignment
*
* @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
*
* @param array $lines
*/
public function stripSemicolon(&$lines)
{
}
/**
* Output lines inside a block
*
* @param string $inner
* @param \stdClass $block
*/
protected function blockLines($inner, $block)
{
$glue = $this->break . $inner;
echo $inner . implode($glue, $block->lines);
if (! empty($block->children)) {
echo $this->break;
}
}
/**
* Output non-empty block
*
* @param \stdClass $block
*/
protected function block($block)
{
if (empty($block->lines) && empty($block->children)) {
return;
}
$inner = $pre = $this->indentStr();
if (! empty($block->selectors)) {
echo $pre
. implode($this->tagSeparator, $block->selectors)
. $this->open . $this->break;
$this->indentLevel++;
$inner = $this->indentStr();
}
if (! empty($block->lines)) {
$this->blockLines($inner, $block);
}
foreach ($block->children as $child) {
$this->block($child);
}
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
*
* @param \stdClass $block An abstract syntax tree
*
* @return string
*/
public function format($block)
{
ob_start();
$this->block($block);
$out = ob_get_clean();
return $out;
}
}
|
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