Subversion-Projekte lars-tiefland.laravel_shop

<?php

/*

 * This file is part of Psy Shell.

 *

 * (c) 2012-2022 Justin Hileman

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Psy\Formatter;

use Psy\Exception\RuntimeException;

use Symfony\Component\Console\Formatter\OutputFormatter;

/**

 * A pretty-printer for code.

 */

class CodeFormatter implements ReflectorFormatter

{

    const LINE_MARKER = '  <urgent>></urgent> ';

    const NO_LINE_MARKER = '    ';

    const HIGHLIGHT_DEFAULT = 'default';

    const HIGHLIGHT_KEYWORD = 'keyword';

    const HIGHLIGHT_PUBLIC = 'public';

    const HIGHLIGHT_PROTECTED = 'protected';

    const HIGHLIGHT_PRIVATE = 'private';

    const HIGHLIGHT_CONST = 'const';

    const HIGHLIGHT_NUMBER = 'number';

    const HIGHLIGHT_STRING = 'string';

    const HIGHLIGHT_COMMENT = 'comment';

    const HIGHLIGHT_INLINE_HTML = 'inline_html';

    private static $tokenMap = [

        // Not highlighted

        \T_OPEN_TAG           => self::HIGHLIGHT_DEFAULT,

        \T_OPEN_TAG_WITH_ECHO => self::HIGHLIGHT_DEFAULT,

        \T_CLOSE_TAG          => self::HIGHLIGHT_DEFAULT,

        \T_STRING             => self::HIGHLIGHT_DEFAULT,

        \T_VARIABLE           => self::HIGHLIGHT_DEFAULT,

        \T_NS_SEPARATOR       => self::HIGHLIGHT_DEFAULT,

        // Visibility

        \T_PUBLIC    => self::HIGHLIGHT_PUBLIC,

        \T_PROTECTED => self::HIGHLIGHT_PROTECTED,

        \T_PRIVATE   => self::HIGHLIGHT_PRIVATE,

        // Constants

        \T_DIR      => self::HIGHLIGHT_CONST,

        \T_FILE     => self::HIGHLIGHT_CONST,

        \T_METHOD_C => self::HIGHLIGHT_CONST,

        \T_NS_C     => self::HIGHLIGHT_CONST,

        \T_LINE     => self::HIGHLIGHT_CONST,

        \T_CLASS_C  => self::HIGHLIGHT_CONST,

        \T_FUNC_C   => self::HIGHLIGHT_CONST,

        \T_TRAIT_C  => self::HIGHLIGHT_CONST,

        // Types

        \T_DNUMBER                  => self::HIGHLIGHT_NUMBER,

        \T_LNUMBER                  => self::HIGHLIGHT_NUMBER,

        \T_ENCAPSED_AND_WHITESPACE  => self::HIGHLIGHT_STRING,

        \T_CONSTANT_ENCAPSED_STRING => self::HIGHLIGHT_STRING,

        // Comments

        \T_COMMENT     => self::HIGHLIGHT_COMMENT,

        \T_DOC_COMMENT => self::HIGHLIGHT_COMMENT,

        // @todo something better here?

        \T_INLINE_HTML => self::HIGHLIGHT_INLINE_HTML,

    ];

    /**

     * Format the code represented by $reflector for shell output.

     *

     * @param \Reflector  $reflector

     * @param string|null $colorMode (deprecated and ignored)

     *

     * @return string formatted code

     */

    public static function format(\Reflector $reflector, string $colorMode = null): string

    {

        if (self::isReflectable($reflector)) {

            if ($code = @\file_get_contents($reflector->getFileName())) {

                return self::formatCode($code, self::getStartLine($reflector), $reflector->getEndLine());

            }

        }

        throw new RuntimeException('Source code unavailable');

    }

    /**

     * Format code for shell output.

     *

     * Optionally, restrict by $startLine and $endLine line numbers, or pass $markLine to add a line marker.

     *

     * @param string   $code

     * @param int      $startLine

     * @param int|null $endLine

     * @param int|null $markLine

     *

     * @return string formatted code

     */

    public static function formatCode(string $code, int $startLine = 1, int $endLine = null, int $markLine = null): string

    {

        $spans = self::tokenizeSpans($code);

        $lines = self::splitLines($spans, $startLine, $endLine);

        $lines = self::formatLines($lines);

        $lines = self::numberLines($lines, $markLine);

        return \implode('', \iterator_to_array($lines));

    }

    /**

     * Get the start line for a given Reflector.

     *

     * Tries to incorporate doc comments if possible.

     *

     * This is typehinted as \Reflector but we've narrowed the input via self::isReflectable already.

     *

     * @param \ReflectionClass|\ReflectionFunctionAbstract $reflector

     *

     * @return int

     */

    private static function getStartLine(\Reflector $reflector): int

    {

        $startLine = $reflector->getStartLine();

        if ($docComment = $reflector->getDocComment()) {

            $startLine -= \preg_match_all('/(\r\n?|\n)/', $docComment) + 1;

        }

        return \max($startLine, 1);

    }

    /**

     * Split code into highlight spans.

     *

     * Tokenize via \token_get_all, then map these tokens to internal highlight types, combining

     * adjacent spans of the same highlight type.

     *

     * @todo consider switching \token_get_all() out for PHP-Parser-based formatting at some point.

     *

     * @param string $code

     *

     * @return \Generator [$spanType, $spanText] highlight spans

     */

    private static function tokenizeSpans(string $code): \Generator

    {

        $spanType = null;

        $buffer = '';

        foreach (\token_get_all($code) as $token) {

            $nextType = self::nextHighlightType($token, $spanType);

            $spanType = $spanType ?: $nextType;

            if ($spanType !== $nextType) {

                yield [$spanType, $buffer];

                $spanType = $nextType;

                $buffer = '';

            }

            $buffer .= \is_array($token) ? $token[1] : $token;

        }

        if ($spanType !== null && $buffer !== '') {

            yield [$spanType, $buffer];

        }

    }

    /**

     * Given a token and the current highlight span type, compute the next type.

     *

     * @param array|string $token       \token_get_all token

     * @param string|null  $currentType

     *

     * @return string|null

     */

    private static function nextHighlightType($token, $currentType)

    {

        if ($token === '"') {

            return self::HIGHLIGHT_STRING;

        }

        if (\is_array($token)) {

            if ($token[0] === \T_WHITESPACE) {

                return $currentType;

            }

            if (\array_key_exists($token[0], self::$tokenMap)) {

                return self::$tokenMap[$token[0]];

            }

        }

        return self::HIGHLIGHT_KEYWORD;

    }

    /**

     * Group highlight spans into an array of lines.

     *

     * Optionally, restrict by start and end line numbers.

     *

     * @param \Generator $spans     as [$spanType, $spanText] pairs

     * @param int        $startLine

     * @param int|null   $endLine

     *

     * @return \Generator lines, each an array of [$spanType, $spanText] pairs

     */

    private static function splitLines(\Generator $spans, int $startLine = 1, int $endLine = null): \Generator

    {

        $lineNum = 1;

        $buffer = [];

        foreach ($spans as list($spanType, $spanText)) {

            foreach (\preg_split('/(\r\n?|\n)/', $spanText) as $index => $spanLine) {

                if ($index > 0) {

                    if ($lineNum >= $startLine) {

                        yield $lineNum => $buffer;

                    }

                    $lineNum++;

                    $buffer = [];

                    if ($endLine !== null && $lineNum > $endLine) {

                        return;

                    }

                }

                if ($spanLine !== '') {

                    $buffer[] = [$spanType, $spanLine];

                }

            }

        }

        if (!empty($buffer)) {

            yield $lineNum => $buffer;

        }

    }

    /**

     * Format lines of highlight spans for shell output.

     *

     * @param \Generator $spanLines lines, each an array of [$spanType, $spanText] pairs

     *

     * @return \Generator Formatted lines

     */

    private static function formatLines(\Generator $spanLines): \Generator

    {

        foreach ($spanLines as $lineNum => $spanLine) {

            $line = '';

            foreach ($spanLine as list($spanType, $spanText)) {

                if ($spanType === self::HIGHLIGHT_DEFAULT) {

                    $line .= OutputFormatter::escape($spanText);

                } else {

                    $line .= \sprintf('<%s>%s</%s>', $spanType, OutputFormatter::escape($spanText), $spanType);

                }

            }

            yield $lineNum => $line.\PHP_EOL;

        }

    }

    /**

     * Prepend line numbers to formatted lines.

     *

     * Lines must be in an associative array with the correct keys in order to be numbered properly.

     *

     * Optionally, pass $markLine to add a line marker.

     *

     * @param \Generator $lines    Formatted lines

     * @param int|null   $markLine

     *

     * @return \Generator Numbered, formatted lines

     */

    private static function numberLines(\Generator $lines, int $markLine = null): \Generator

    {

        $lines = \iterator_to_array($lines);

        // Figure out how much space to reserve for line numbers.

        \end($lines);

        $pad = \strlen(\key($lines));

        // If $markLine is before or after our line range, don't bother reserving space for the marker.

        if ($markLine !== null) {

            if ($markLine > \key($lines)) {

                $markLine = null;

            }

            \reset($lines);

            if ($markLine < \key($lines)) {

                $markLine = null;

            }

        }

        foreach ($lines as $lineNum => $line) {

            $mark = '';

            if ($markLine !== null) {

                $mark = ($markLine === $lineNum) ? self::LINE_MARKER : self::NO_LINE_MARKER;

            }

            yield \sprintf("%s<aside>%{$pad}s</aside>: %s", $mark, $lineNum, $line);

        }

    }

    /**

     * Check whether a Reflector instance is reflectable by this formatter.

     *

     * @param \Reflector $reflector

     *

     * @return bool

     */

    private static function isReflectable(\Reflector $reflector): bool

    {

        return ($reflector instanceof \ReflectionClass || $reflector instanceof \ReflectionFunctionAbstract) && \is_file($reflector->getFileName());

    }

}