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Edit File: CodeExtension.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bridge\Twig\Extension;

use Symfony\Component\HttpKernel\Debug\FileLinkFormatter;
use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;

/**
 * Twig extension relate to PHP code and used by the profiler and the default exception templates.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class CodeExtension extends AbstractExtension
{
 private $fileLinkFormat;
 private $rootDir;
 private $charset;

/**
     * @param string|FileLinkFormatter $fileLinkFormat The format for links to source files
     * @param string                   $rootDir        The project root directory
     * @param string                   $charset        The charset
     */
    public function __construct($fileLinkFormat, $rootDir, $charset)
    {
        $this->fileLinkFormat = $fileLinkFormat ?: ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format');
        $this->rootDir = str_replace('/', \DIRECTORY_SEPARATOR, \dirname($rootDir)).\DIRECTORY_SEPARATOR;
        $this->charset = $charset;
    }

/**
     * {@inheritdoc}
     */
    public function getFilters()
    {
        return [
            new TwigFilter('abbr_class', [$this, 'abbrClass'], ['is_safe' => ['html']]),
            new TwigFilter('abbr_method', [$this, 'abbrMethod'], ['is_safe' => ['html']]),
            new TwigFilter('format_args', [$this, 'formatArgs'], ['is_safe' => ['html']]),
            new TwigFilter('format_args_as_text', [$this, 'formatArgsAsText']),
            new TwigFilter('file_excerpt', [$this, 'fileExcerpt'], ['is_safe' => ['html']]),
            new TwigFilter('format_file', [$this, 'formatFile'], ['is_safe' => ['html']]),
            new TwigFilter('format_file_from_text', [$this, 'formatFileFromText'], ['is_safe' => ['html']]),
            new TwigFilter('format_log_message', [$this, 'formatLogMessage'], ['is_safe' => ['html']]),
            new TwigFilter('file_link', [$this, 'getFileLink']),
        ];
    }

public function abbrClass($class)
    {
        $parts = explode('\\', $class);
        $short = array_pop($parts);

return sprintf('<abbr title="%s">%s</abbr>', $class, $short);
 }

public function abbrMethod($method)
 {
 if (false !== strpos($method, '::')) {
 list($class, $method) = explode('::', $method, 2);
 $result = sprintf('%s::%s()', $this->abbrClass($class), $method);
 } elseif ('Closure' === $method) {
 $result = sprintf('<abbr title="%s">%1$s</abbr>', $method);
 } else {
 $result = sprintf('<abbr title="%s">%1$s</abbr>()', $method);
 }

return $result;
    }

/**
 * Formats an array as a string.
 *
 * @param array $args The argument array
 *
 * @return string
 */
 public function formatArgs($args)
 {
 $result = [];
 foreach ($args as $key => $item) {
 if ('object' === $item[0]) {
 $parts = explode('\\', $item[1]);
 $short = array_pop($parts);
 $formattedValue = sprintf('object(<abbr title="%s">%s</abbr>)', $item[1], $short);
 } elseif ('array' === $item[0]) {
 $formattedValue = sprintf('array(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
 } elseif ('null' === $item[0]) {
 $formattedValue = 'null';
 } elseif ('boolean' === $item[0]) {
 $formattedValue = ''.strtolower(var_export($item[1], true)).'';
 } elseif ('resource' === $item[0]) {
 $formattedValue = 'resource';
 } else {
 $formattedValue = str_replace("\n", '', htmlspecialchars(var_export($item[1], true), \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset));
 }

$result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
        }

return implode(', ', $result);
    }

/**
     * Formats an array as a string.
     *
     * @param array $args The argument array
     *
     * @return string
     */
    public function formatArgsAsText($args)
    {
        return strip_tags($this->formatArgs($args));
    }

/**
 * Returns an excerpt of a code file around the given line number.
 *
 * @param string $file A file path
 * @param int $line The selected line number
 * @param int $srcContext The number of displayed lines around or -1 for the whole file
 *
 * @return string An HTML string
 */
 public function fileExcerpt($file, $line, $srcContext = 3)
 {
 if (is_file($file) && is_readable($file)) {
 // highlight_file could throw warnings
 // see https://bugs.php.net/25725
 $code = @highlight_file($file, true);
 // remove main code/span tags
 $code = preg_replace('#^<code.*?>\s*<span.*?>(.*)\s*</code>#s', '\\1', $code);
 // split multiline spans
 $code = preg_replace_callback('#]++)>((?:[^<]*+ )++[^<]*+)#', function ($m) {
 return "".str_replace(' ', " ", $m[2]).'';
 }, $code);
 $content = explode(' ', $code);

$lines = [];
            if (0 > $srcContext) {
                $srcContext = \count($content);
            }

for ($i = max($line - $srcContext, 1), $max = min($line + $srcContext, \count($content)); $i <= $max; ++$i) {
 $lines[] = '<li'.($i == $line ? ' class="selected"' : '').'><a class="anchor" name="line'.$i.'"></a><code>'.self::fixCodeMarkup($content[$i - 1]).'</code></li>';
 }

return '<ol start="'.max($line - $srcContext, 1).'">'.implode("\n", $lines).'</ol>';
 }

return null;
    }

/**
     * Formats a file path.
     *
     * @param string $file An absolute file path
     * @param int    $line The line number
     * @param string $text Use this text for the link rather than the file path
     *
     * @return string
     */
    public function formatFile($file, $line, $text = null)
    {
        $file = trim($file);

if (null === $text) {
 $text = str_replace('/', \DIRECTORY_SEPARATOR, $file);
 if (0 === strpos($text, $this->rootDir)) {
 $text = substr($text, \strlen($this->rootDir));
 $text = explode(\DIRECTORY_SEPARATOR, $text, 2);
 $text = sprintf('<abbr title="%s%2$s">%s</abbr>%s', $this->rootDir, $text[0], isset($text[1]) ? \DIRECTORY_SEPARATOR.$text[1] : '');
 }
 }

if (0 < $line) {
 $text .= ' at line '.$line;
 }

if (false !== $link = $this->getFileLink($file, $line)) {
 return sprintf('<a href="%s" title="Click to open this file" class="file_link">%s</a>', htmlspecialchars($link, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset), $text);
 }

return $text;
    }

/**
     * Returns the link for a given file/line pair.
     *
     * @param string $file An absolute file path
     * @param int    $line The line number
     *
     * @return string|false A link or false
     */
    public function getFileLink($file, $line)
    {
        if ($fmt = $this->fileLinkFormat) {
            return \is_string($fmt) ? strtr($fmt, ['%f' => $file, '%l' => $line]) : $fmt->format($file, $line);
        }

return false;
    }

public function formatFileFromText($text)
    {
        return preg_replace_callback('/in ("|&quot;)?(.+?)\1(?: +(?:on|at))? +line (\d+)/s', function ($match) {
            return 'in '.$this->formatFile($match[2], $match[3]);
        }, $text);
    }

/**
     * @internal
     */
    public function formatLogMessage($message, array $context)
    {
        if ($context && false !== strpos($message, '{')) {
            $replacements = [];
            foreach ($context as $key => $val) {
                if (is_scalar($val)) {
                    $replacements['{'.$key.'}'] = $val;
                }
            }

if ($replacements) {
                $message = strtr($message, $replacements);
            }
        }

return htmlspecialchars($message, \ENT_COMPAT | \ENT_SUBSTITUTE, $this->charset);
    }

/**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'code';
    }

protected static function fixCodeMarkup($line)
 {
 // ending tag from previous line
 $opening = strpos($line, '<span');
 $closing = strpos($line, '');
 if (false !== $closing && (false === $opening || $closing < $opening)) {
 $line = substr_replace($line, '', $closing, 7);
 }

// missing tag at the end of line
 $opening = strpos($line, '<span');
 $closing = strpos($line, '');
 if (false !== $opening && (false === $closing || $closing > $opening)) {
 $line .= '';
 }

return trim($line);
    }
}