Code.php
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<?php
namespace Dcat\Admin\Widgets;
class Code extends Markdown
{
/**
* @var string
*/
protected $lang = 'php';
/**
* @param string $content
* @param int $start
* @param int $end
*/
public function __construct($content = '', int $start = 1, int $end = 1000)
{
if (is_array($content) || is_object($content)) {
$content = json_encode($content, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
} elseif (is_file($content)) {
$this->readFileContent($content, $start, $end);
$content = null;
}
parent::__construct($content);
}
/**
* 设置语言.
*
* @param string $lang
* @return $this
*/
public function lang(string $lang)
{
$this->lang = $lang;
return $this;
}
public function javascript()
{
return $this->lang('javascript');
}
public function asHtml()
{
return $this->lang('html');
}
public function java()
{
return $this->lang('java');
}
public function python()
{
return $this->lang('python');
}
/**
* 读取指定行上下区间文件内容.
*
* @param string $file
* @param int $lineNumber
* @param int $padding
* @return $this
*/
public function section($file, $lineNumber = 1, $context = 5)
{
return $this->readFileContent($file, $lineNumber - $context, $lineNumber + $context);
}
/**
* 读取指定行文件内容.
*
* @param string $file
* @param int $start
* @param int $end
* @return $this
*/
public function readFileContent($file, $start = 1, $end = 10)
{
if (! $file or ! is_readable($file) || $end < $start) {
return $this;
}
$file = fopen($file, 'r');
$line = 0;
$source = '';
while (($row = fgets($file)) !== false) {
if (++$line > $end) {
break;
}
if ($line >= $start) {
$source .= htmlspecialchars($row, ENT_NOQUOTES, config('charset', 'utf-8'));
}
}
fclose($file);
return $this->content($source);
}
protected function renderContent()
{
$content = parent::renderContent();
return <<<EOF
```{$this->lang}
{$content}
```
EOF;
}
}