Stack.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace think\console\output\formatter;
class Stack
{
/**
* @var Style[]
*/
private $styles;
/**
* @var Style
*/
private $emptyStyle;
/**
* 构造方法
* @param Style|null $emptyStyle
*/
public function __construct(Style $emptyStyle = null)
{
$this->emptyStyle = $emptyStyle ?: new Style();
$this->reset();
}
/**
* 重置堆栈
*/
public function reset()
{
$this->styles = [];
}
/**
* 推一个样式进入堆栈
* @param Style $style
*/
public function push(Style $style)
{
$this->styles[] = $style;
}
/**
* 从堆栈中弹出一个样式
* @param Style|null $style
* @return Style
* @throws \InvalidArgumentException
*/
public function pop(Style $style = null)
{
if (empty($this->styles)) {
return $this->emptyStyle;
}
if (null === $style) {
return array_pop($this->styles);
}
/**
* @var int $index
* @var Style $stackedStyle
*/
foreach (array_reverse($this->styles, true) as $index => $stackedStyle) {
if ($style->apply('') === $stackedStyle->apply('')) {
$this->styles = array_slice($this->styles, 0, $index);
return $stackedStyle;
}
}
throw new \InvalidArgumentException('Incorrectly nested style tag found.');
}
/**
* 计算堆栈的当前样式。
* @return Style
*/
public function getCurrent()
{
if (empty($this->styles)) {
return $this->emptyStyle;
}
return $this->styles[count($this->styles) - 1];
}
/**
* @param Style $emptyStyle
* @return Stack
*/
public function setEmptyStyle(Style $emptyStyle)
{
$this->emptyStyle = $emptyStyle;
return $this;
}
/**
* @return Style
*/
public function getEmptyStyle()
{
return $this->emptyStyle;
}
}