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<?php
declare(strict_types=1);
namespace NunoMaduro\Collision;
use NunoMaduro\Collision\Contracts\Highlighter as HighlighterContract;
/**
* @internal
*/
final class Highlighter implements HighlighterContract
{
public const TOKEN_DEFAULT = 'token_default';
public const TOKEN_COMMENT = 'token_comment';
public const TOKEN_STRING = 'token_string';
public const TOKEN_HTML = 'token_html';
public const TOKEN_KEYWORD = 'token_keyword';
public const ACTUAL_LINE_MARK = 'actual_line_mark';
public const LINE_NUMBER = 'line_number';
private const ARROW_SYMBOL = '>';
private const DELIMITER = '|';
private const ARROW_SYMBOL_UTF8 = '➜';
private const DELIMITER_UTF8 = 'â–•'; // 'â–¶';
private const LINE_NUMBER_DIVIDER = 'line_divider';
private const MARKED_LINE_NUMBER = 'marked_line';
private const WIDTH = 3;
/**
* Holds the theme.
*
* @var array
*/
private const THEME = [
self::TOKEN_STRING => ['light_gray'],
self::TOKEN_COMMENT => ['dark_gray', 'italic'],
self::TOKEN_KEYWORD => ['magenta', 'bold'],
self::TOKEN_DEFAULT => ['default', 'bold'],
self::TOKEN_HTML => ['blue', 'bold'],
self::ACTUAL_LINE_MARK => ['red', 'bold'],
self::LINE_NUMBER => ['dark_gray'],
self::MARKED_LINE_NUMBER => ['italic', 'bold'],
self::LINE_NUMBER_DIVIDER => ['dark_gray'],
];
/** @var ConsoleColor */
private $color;
/** @var array */
private const DEFAULT_THEME = [
self::TOKEN_STRING => 'red',
self::TOKEN_COMMENT => 'yellow',
self::TOKEN_KEYWORD => 'green',
self::TOKEN_DEFAULT => 'default',
self::TOKEN_HTML => 'cyan',
self::ACTUAL_LINE_MARK => 'dark_gray',
self::LINE_NUMBER => 'dark_gray',
self::MARKED_LINE_NUMBER => 'dark_gray',
self::LINE_NUMBER_DIVIDER => 'dark_gray',
];
/** @var string */
private $delimiter = self::DELIMITER_UTF8;
/** @var string */
private $arrow = self::ARROW_SYMBOL_UTF8;
/**
* @var string
*/
private const NO_MARK = ' ';
/**
* Creates an instance of the Highlighter.
*/
public function __construct(ConsoleColor $color = null, bool $UTF8 = true)
{
$this->color = $color ?: new ConsoleColor();
foreach (self::DEFAULT_THEME as $name => $styles) {
if (!$this->color->hasTheme($name)) {
$this->color->addTheme($name, $styles);
}
}
foreach (self::THEME as $name => $styles) {
$this->color->addTheme($name, $styles);
}
if (!$UTF8) {
$this->delimiter = self::DELIMITER;
$this->arrow = self::ARROW_SYMBOL;
}
$this->delimiter .= ' ';
}
/**
* {@inheritdoc}
*/
public function highlight(string $content, int $line): string
{
return rtrim($this->getCodeSnippet($content, $line, 4, 4));
}
/**
* @param string $source
* @param int $lineNumber
* @param int $linesBefore
* @param int $linesAfter
*/
public function getCodeSnippet($source, $lineNumber, $linesBefore = 2, $linesAfter = 2): string
{
$tokenLines = $this->getHighlightedLines($source);
$offset = $lineNumber - $linesBefore - 1;
$offset = max($offset, 0);
$length = $linesAfter + $linesBefore + 1;
$tokenLines = array_slice($tokenLines, $offset, $length, $preserveKeys = true);
$lines = $this->colorLines($tokenLines);
return $this->lineNumbers($lines, $lineNumber);
}
/**
* @param string $source
*/
private function getHighlightedLines($source): array
{
$source = str_replace(["\r\n", "\r"], "\n", $source);
$tokens = $this->tokenize($source);
return $this->splitToLines($tokens);
}
/**
* @param string $source
*/
private function tokenize($source): array
{
$tokens = token_get_all($source);
$output = [];
$currentType = null;
$buffer = '';
foreach ($tokens as $token) {
if (is_array($token)) {
switch ($token[0]) {
case T_WHITESPACE:
break;
case T_OPEN_TAG:
case T_OPEN_TAG_WITH_ECHO:
case T_CLOSE_TAG:
case T_STRING:
case T_VARIABLE:
// Constants
case T_DIR:
case T_FILE:
case T_METHOD_C:
case T_DNUMBER:
case T_LNUMBER:
case T_NS_C:
case T_LINE:
case T_CLASS_C:
case T_FUNC_C:
case T_TRAIT_C:
$newType = self::TOKEN_DEFAULT;
break;
case T_COMMENT:
case T_DOC_COMMENT:
$newType = self::TOKEN_COMMENT;
break;
case T_ENCAPSED_AND_WHITESPACE:
case T_CONSTANT_ENCAPSED_STRING:
$newType = self::TOKEN_STRING;
break;
case T_INLINE_HTML:
$newType = self::TOKEN_HTML;
break;
default:
$newType = self::TOKEN_KEYWORD;
}
} else {
$newType = $token === '"' ? self::TOKEN_STRING : self::TOKEN_KEYWORD;
}
if ($currentType === null) {
$currentType = $newType;
}
if ($currentType !== $newType) {
$output[] = [$currentType, $buffer];
$buffer = '';
$currentType = $newType;
}
$buffer .= is_array($token) ? $token[1] : $token;
}
if (isset($newType)) {
$output[] = [$newType, $buffer];
}
return $output;
}
private function splitToLines(array $tokens): array
{
$lines = [];
$line = [];
foreach ($tokens as $token) {
foreach (explode("\n", $token[1]) as $count => $tokenLine) {
if ($count > 0) {
$lines[] = $line;
$line = [];
}
if ($tokenLine === '') {
continue;
}
$line[] = [$token[0], $tokenLine];
}
}
$lines[] = $line;
return $lines;
}
private function colorLines(array $tokenLines): array
{
$lines = [];
foreach ($tokenLines as $lineCount => $tokenLine) {
$line = '';
foreach ($tokenLine as $token) {
[$tokenType, $tokenValue] = $token;
if ($this->color->hasTheme($tokenType)) {
$line .= $this->color->apply($tokenType, $tokenValue);
} else {
$line .= $tokenValue;
}
}
$lines[$lineCount] = $line;
}
return $lines;
}
/**
* @param int|null $markLine
*/
private function lineNumbers(array $lines, $markLine = null): string
{
$lineStrlen = strlen((string) (array_key_last($lines) + 1));
$lineStrlen = $lineStrlen < self::WIDTH ? self::WIDTH : $lineStrlen;
$snippet = '';
$mark = ' ' . $this->arrow . ' ';
foreach ($lines as $i => $line) {
$coloredLineNumber = $this->coloredLineNumber(self::LINE_NUMBER, $i, $lineStrlen);
if (null !== $markLine) {
$snippet .=
($markLine === $i + 1
? $this->color->apply(self::ACTUAL_LINE_MARK, $mark)
: self::NO_MARK
);
$coloredLineNumber =
($markLine === $i + 1 ?
$this->coloredLineNumber(self::MARKED_LINE_NUMBER, $i, $lineStrlen) :
$coloredLineNumber
);
}
$snippet .= $coloredLineNumber;
$snippet .=
$this->color->apply(self::LINE_NUMBER_DIVIDER, $this->delimiter);
$snippet .= $line . PHP_EOL;
}
return $snippet;
}
/**
* @param string $style
* @param int $i
* @param int $lineStrlen
*/
private function coloredLineNumber($style, $i, $lineStrlen): string
{
return $this->color->apply($style, str_pad((string) ($i + 1), $lineStrlen, ' ', STR_PAD_LEFT));
}
}