Файл: upload/core/vendor/twig/twig/src/Lexer.php
Строк: 548
<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
* (c) Armin Ronacher
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig;
use TwigErrorSyntaxError;
/**
* @author Fabien Potencier <fabien@symfony.com>
*/
class Lexer
{
private $isInitialized = false;
private $tokens;
private $code;
private $cursor;
private $lineno;
private $end;
private $state;
private $states;
private $brackets;
private $env;
private $source;
private $options;
private $regexes;
private $position;
private $positions;
private $currentVarBlockLine;
private array $openingBrackets = ['{', '(', '['];
private array $closingBrackets = ['}', ')', ']'];
public const STATE_DATA = 0;
public const STATE_BLOCK = 1;
public const STATE_VAR = 2;
public const STATE_STRING = 3;
public const STATE_INTERPOLATION = 4;
public const REGEX_NAME = '/[a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*/A';
public const REGEX_STRING = '/"([^#"\\]*(?:\\.[^#"\\]*)*)"|'([^'\\]*(?:\\.[^'\\]*)*)'/As';
public const REGEX_NUMBER = '/(?(DEFINE)
(?<LNUM>[0-9]+(_[0-9]+)*) # Integers (with underscores) 123_456
(?<FRAC>.(?&LNUM)) # Fractional part .456
(?<EXPONENT>[eE][+-]?(?&LNUM)) # Exponent part E+10
(?<DNUM>(?&LNUM)(?:(?&FRAC))?) # Decimal number 123_456.456
)(?:(?&DNUM)(?:(?&EXPONENT))?) # 123_456.456E+10
/Ax';
public const REGEX_DQ_STRING_DELIM = '/"/A';
public const REGEX_DQ_STRING_PART = '/[^#"\\]*(?:(?:\\.|#(?!{))[^#"\\]*)*/As';
public const REGEX_INLINE_COMMENT = '/#[^n]*/A';
public const PUNCTUATION = '()[]{}?:.,|';
private const SPECIAL_CHARS = [
'f' => "f",
'n' => "n",
'r' => "r",
't' => "t",
'v' => "v",
];
public function __construct(Environment $env, array $options = [])
{
$this->env = $env;
$this->options = array_merge([
'tag_comment' => ['{#', '#}'],
'tag_block' => ['{%', '%}'],
'tag_variable' => ['{{', '}}'],
'whitespace_trim' => '-',
'whitespace_line_trim' => '~',
'whitespace_line_chars' => ' t x0B',
'interpolation' => ['#{', '}'],
], $options);
}
private function initialize(): void
{
if ($this->isInitialized) {
return;
}
// when PHP 7.3 is the min version, we will be able to remove the '#' part in preg_quote as it's part of the default
$this->regexes = [
// }}
'lex_var' => '{
s*
(?:'.
preg_quote($this->options['whitespace_trim'].$this->options['tag_variable'][1], '#').'s*'. // -}}s*
'|'.
preg_quote($this->options['whitespace_line_trim'].$this->options['tag_variable'][1], '#').'['.$this->options['whitespace_line_chars'].']*'. // ~}}[ t x0B]*
'|'.
preg_quote($this->options['tag_variable'][1], '#'). // }}
')
}Ax',
// %}
'lex_block' => '{
s*
(?:'.
preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '#').'s*n?'. // -%}s*n?
'|'.
preg_quote($this->options['whitespace_line_trim'].$this->options['tag_block'][1], '#').'['.$this->options['whitespace_line_chars'].']*'. // ~%}[ t x0B]*
'|'.
preg_quote($this->options['tag_block'][1], '#').'n?'. // %}n?
')
}Ax',
// {% endverbatim %}
'lex_raw_data' => '{'.
preg_quote($this->options['tag_block'][0], '#'). // {%
'('.
$this->options['whitespace_trim']. // -
'|'.
$this->options['whitespace_line_trim']. // ~
')?s*endverbatims*'.
'(?:'.
preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '#').'s*'. // -%}
'|'.
preg_quote($this->options['whitespace_line_trim'].$this->options['tag_block'][1], '#').'['.$this->options['whitespace_line_chars'].']*'. // ~%}[ t x0B]*
'|'.
preg_quote($this->options['tag_block'][1], '#'). // %}
')
}sx',
'operator' => $this->getOperatorRegex(),
// #}
'lex_comment' => '{
(?:'.
preg_quote($this->options['whitespace_trim'].$this->options['tag_comment'][1], '#').'s*n?'. // -#}s*n?
'|'.
preg_quote($this->options['whitespace_line_trim'].$this->options['tag_comment'][1], '#').'['.$this->options['whitespace_line_chars'].']*'. // ~#}[ t x0B]*
'|'.
preg_quote($this->options['tag_comment'][1], '#').'n?'. // #}n?
')
}sx',
// verbatim %}
'lex_block_raw' => '{
s*verbatims*
(?:'.
preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '#').'s*'. // -%}s*
'|'.
preg_quote($this->options['whitespace_line_trim'].$this->options['tag_block'][1], '#').'['.$this->options['whitespace_line_chars'].']*'. // ~%}[ t x0B]*
'|'.
preg_quote($this->options['tag_block'][1], '#'). // %}
')
}Asx',
'lex_block_line' => '{s*lines+(d+)s*'.preg_quote($this->options['tag_block'][1], '#').'}As',
// {{ or {% or {#
'lex_tokens_start' => '{
('.
preg_quote($this->options['tag_variable'][0], '#'). // {{
'|'.
preg_quote($this->options['tag_block'][0], '#'). // {%
'|'.
preg_quote($this->options['tag_comment'][0], '#'). // {#
')('.
preg_quote($this->options['whitespace_trim'], '#'). // -
'|'.
preg_quote($this->options['whitespace_line_trim'], '#'). // ~
')?
}sx',
'interpolation_start' => '{'.preg_quote($this->options['interpolation'][0], '#').'s*}A',
'interpolation_end' => '{s*'.preg_quote($this->options['interpolation'][1], '#').'}A',
];
$this->isInitialized = true;
}
public function tokenize(Source $source): TokenStream
{
$this->initialize();
$this->source = $source;
$this->code = str_replace(["rn", "r"], "n", $source->getCode());
$this->cursor = 0;
$this->lineno = 1;
$this->end = strlen($this->code);
$this->tokens = [];
$this->state = self::STATE_DATA;
$this->states = [];
$this->brackets = [];
$this->position = -1;
// find all token starts in one go
preg_match_all($this->regexes['lex_tokens_start'], $this->code, $matches, PREG_OFFSET_CAPTURE);
$this->positions = $matches;
while ($this->cursor < $this->end) {
// dispatch to the lexing functions depending
// on the current state
switch ($this->state) {
case self::STATE_DATA:
$this->lexData();
break;
case self::STATE_BLOCK:
$this->lexBlock();
break;
case self::STATE_VAR:
$this->lexVar();
break;
case self::STATE_STRING:
$this->lexString();
break;
case self::STATE_INTERPOLATION:
$this->lexInterpolation();
break;
}
}
$this->pushToken(Token::EOF_TYPE);
if ($this->brackets) {
[$expect, $lineno] = array_pop($this->brackets);
throw new SyntaxError(sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
}
return new TokenStream($this->tokens, $this->source);
}
private function lexData(): void
{
// if no matches are left we return the rest of the template as simple text token
if ($this->position == count($this->positions[0]) - 1) {
$this->pushToken(Token::TEXT_TYPE, substr($this->code, $this->cursor));
$this->cursor = $this->end;
return;
}
// Find the first token after the current cursor
$position = $this->positions[0][++$this->position];
while ($position[1] < $this->cursor) {
if ($this->position == count($this->positions[0]) - 1) {
return;
}
$position = $this->positions[0][++$this->position];
}
// push the template text first
$text = $textContent = substr($this->code, $this->cursor, $position[1] - $this->cursor);
// trim?
if (isset($this->positions[2][$this->position][0])) {
if ($this->options['whitespace_trim'] === $this->positions[2][$this->position][0]) {
// whitespace_trim detected ({%-, {{- or {#-)
$text = rtrim($text);
} elseif ($this->options['whitespace_line_trim'] === $this->positions[2][$this->position][0]) {
// whitespace_line_trim detected ({%~, {{~ or {#~)
// don't trim r and n
$text = rtrim($text, " t x0B");
}
}
$this->pushToken(Token::TEXT_TYPE, $text);
$this->moveCursor($textContent.$position[0]);
switch ($this->positions[1][$this->position][0]) {
case $this->options['tag_comment'][0]:
$this->lexComment();
break;
case $this->options['tag_block'][0]:
// raw data?
if (preg_match($this->regexes['lex_block_raw'], $this->code, $match, 0, $this->cursor)) {
$this->moveCursor($match[0]);
$this->lexRawData();
// {% line d+ %}
} elseif (preg_match($this->regexes['lex_block_line'], $this->code, $match, 0, $this->cursor)) {
$this->moveCursor($match[0]);
$this->lineno = (int) $match[1];
} else {
$this->pushToken(Token::BLOCK_START_TYPE);
$this->pushState(self::STATE_BLOCK);
$this->currentVarBlockLine = $this->lineno;
}
break;
case $this->options['tag_variable'][0]:
$this->pushToken(Token::VAR_START_TYPE);
$this->pushState(self::STATE_VAR);
$this->currentVarBlockLine = $this->lineno;
break;
}
}
private function lexBlock(): void
{
if (!$this->brackets && preg_match($this->regexes['lex_block'], $this->code, $match, 0, $this->cursor)) {
$this->pushToken(Token::BLOCK_END_TYPE);
$this->moveCursor($match[0]);
$this->popState();
} else {
$this->lexExpression();
}
}
private function lexVar(): void
{
if (!$this->brackets && preg_match($this->regexes['lex_var'], $this->code, $match, 0, $this->cursor)) {
$this->pushToken(Token::VAR_END_TYPE);
$this->moveCursor($match[0]);
$this->popState();
} else {
$this->lexExpression();
}
}
private function lexExpression(): void
{
// whitespace
if (preg_match('/s+/A', $this->code, $match, 0, $this->cursor)) {
$this->moveCursor($match[0]);
if ($this->cursor >= $this->end) {
throw new SyntaxError(sprintf('Unclosed "%s".', self::STATE_BLOCK === $this->state ? 'block' : 'variable'), $this->currentVarBlockLine, $this->source);
}
}
// operators
if (preg_match($this->regexes['operator'], $this->code, $match, 0, $this->cursor)) {
$operator = preg_replace('/s+/', ' ', $match[0]);
if (in_array($operator, $this->openingBrackets, true)) {
$this->checkBrackets($operator);
}
$this->pushToken(Token::OPERATOR_TYPE, $operator);
$this->moveCursor($match[0]);
}
// names
elseif (preg_match(self::REGEX_NAME, $this->code, $match, 0, $this->cursor)) {
$this->pushToken(Token::NAME_TYPE, $match[0]);
$this->moveCursor($match[0]);
}
// numbers
elseif (preg_match(self::REGEX_NUMBER, $this->code, $match, 0, $this->cursor)) {
$this->pushToken(Token::NUMBER_TYPE, 0 + str_replace('_', '', $match[0]));
$this->moveCursor($match[0]);
}
// punctuation
elseif (str_contains(self::PUNCTUATION, $this->code[$this->cursor])) {
$this->checkBrackets($this->code[$this->cursor]);
$this->pushToken(Token::PUNCTUATION_TYPE, $this->code[$this->cursor]);
++$this->cursor;
}
// strings
elseif (preg_match(self::REGEX_STRING, $this->code, $match, 0, $this->cursor)) {
$this->pushToken(Token::STRING_TYPE, $this->stripcslashes(substr($match[0], 1, -1), substr($match[0], 0, 1)));
$this->moveCursor($match[0]);
}
// opening double quoted string
elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) {
$this->brackets[] = ['"', $this->lineno];
$this->pushState(self::STATE_STRING);
$this->moveCursor($match[0]);
}
// inline comment
elseif (preg_match(self::REGEX_INLINE_COMMENT, $this->code, $match, 0, $this->cursor)) {
$this->moveCursor($match[0]);
}
// unlexable
else {
throw new SyntaxError(sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
}
}
private function stripcslashes(string $str, string $quoteType): string
{
$result = '';
$length = strlen($str);
$i = 0;
while ($i < $length) {
if (false === $pos = strpos($str, '\', $i)) {
$result .= substr($str, $i);
break;
}
$result .= substr($str, $i, $pos - $i);
$i = $pos + 1;
if ($i >= $length) {
$result .= '\';
break;
}
$nextChar = $str[$i];
if (isset(self::SPECIAL_CHARS[$nextChar])) {
$result .= self::SPECIAL_CHARS[$nextChar];
} elseif ('\' === $nextChar) {
$result .= $nextChar;
} elseif ("'" === $nextChar || '"' === $nextChar) {
if ($nextChar !== $quoteType) {
trigger_deprecation('twig/twig', '3.12', 'Character "%s" should not be escaped; the "" character is ignored in Twig 3 but will not be in Twig 4. Please remove the extra "" character at position %d in "%s" at line %d.', $nextChar, $i + 1, $this->source->getName(), $this->lineno);
}
$result .= $nextChar;
} elseif ('#' === $nextChar && $i + 1 < $length && '{' === $str[$i + 1]) {
$result .= '#{';
++$i;
} elseif ('x' === $nextChar && $i + 1 < $length && ctype_xdigit($str[$i + 1])) {
$hex = $str[++$i];
if ($i + 1 < $length && ctype_xdigit($str[$i + 1])) {
$hex .= $str[++$i];
}
$result .= chr(hexdec($hex));
} elseif (ctype_digit($nextChar) && $nextChar < '8') {
$octal = $nextChar;
while ($i + 1 < $length && ctype_digit($str[$i + 1]) && $str[$i + 1] < '8' && strlen($octal) < 3) {
$octal .= $str[++$i];
}
$result .= chr(octdec($octal));
} else {
trigger_deprecation('twig/twig', '3.12', 'Character "%s" should not be escaped; the "" character is ignored in Twig 3 but will not be in Twig 4. Please remove the extra "" character at position %d in "%s" at line %d.', $nextChar, $i + 1, $this->source->getName(), $this->lineno);
$result .= $nextChar;
}
++$i;
}
return $result;
}
private function lexRawData(): void
{
if (!preg_match($this->regexes['lex_raw_data'], $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
throw new SyntaxError('Unexpected end of file: Unclosed "verbatim" block.', $this->lineno, $this->source);
}
$text = substr($this->code, $this->cursor, $match[0][1] - $this->cursor);
$this->moveCursor($text.$match[0][0]);
// trim?
if (isset($match[1][0])) {
if ($this->options['whitespace_trim'] === $match[1][0]) {
// whitespace_trim detected ({%-, {{- or {#-)
$text = rtrim($text);
} else {
// whitespace_line_trim detected ({%~, {{~ or {#~)
// don't trim r and n
$text = rtrim($text, " t x0B");
}
}
$this->pushToken(Token::TEXT_TYPE, $text);
}
private function lexComment(): void
{
if (!preg_match($this->regexes['lex_comment'], $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
throw new SyntaxError('Unclosed comment.', $this->lineno, $this->source);
}
$this->moveCursor(substr($this->code, $this->cursor, $match[0][1] - $this->cursor).$match[0][0]);
}
private function lexString(): void
{
if (preg_match($this->regexes['interpolation_start'], $this->code, $match, 0, $this->cursor)) {
$this->brackets[] = [$this->options['interpolation'][0], $this->lineno];
$this->pushToken(Token::INTERPOLATION_START_TYPE);
$this->moveCursor($match[0]);
$this->pushState(self::STATE_INTERPOLATION);
} elseif (preg_match(self::REGEX_DQ_STRING_PART, $this->code, $match, 0, $this->cursor) && '' !== $match[0]) {
$this->pushToken(Token::STRING_TYPE, $this->stripcslashes($match[0], '"'));
$this->moveCursor($match[0]);
} elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) {
[$expect, $lineno] = array_pop($this->brackets);
if ('"' != $this->code[$this->cursor]) {
throw new SyntaxError(sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
}
$this->popState();
++$this->cursor;
} else {
// unlexable
throw new SyntaxError(sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
}
}
private function lexInterpolation(): void
{
$bracket = end($this->brackets);
if ($this->options['interpolation'][0] === $bracket[0] && preg_match($this->regexes['interpolation_end'], $this->code, $match, 0, $this->cursor)) {
array_pop($this->brackets);
$this->pushToken(Token::INTERPOLATION_END_TYPE);
$this->moveCursor($match[0]);
$this->popState();
} else {
$this->lexExpression();
}
}
private function pushToken($type, $value = ''): void
{
// do not push empty text tokens
if (Token::TEXT_TYPE === $type && '' === $value) {
return;
}
$this->tokens[] = new Token($type, $value, $this->lineno);
}
private function moveCursor($text): void
{
$this->cursor += strlen($text);
$this->lineno += substr_count($text, "n");
}
private function getOperatorRegex(): string
{
$expressionParsers = [];
foreach ($this->env->getExpressionParsers() as $expressionParser) {
$expressionParsers = array_merge($expressionParsers, [$expressionParser->getName()], $expressionParser->getAliases());
}
$expressionParsers = array_combine($expressionParsers, array_map('strlen', $expressionParsers));
arsort($expressionParsers);
$regex = [];
foreach ($expressionParsers as $expressionParser => $length) {
// an operator that ends with a character must be followed by
// a whitespace, a parenthesis, an opening map [ or sequence {
$r = preg_quote($expressionParser, '/');
if (ctype_alpha($expressionParser[$length - 1])) {
$r .= '(?=[s()[{])';
}
// an operator that begins with a character must not have a dot or pipe before
if (ctype_alpha($expressionParser[0])) {
$r = '(?<![.|])'.$r;
}
// an operator with a space can be any amount of whitespaces
$r = preg_replace('/s+/', 's+', $r);
$regex[] = $r;
}
return '/'.implode('|', $regex).'/A';
}
private function pushState($state): void
{
$this->states[] = $this->state;
$this->state = $state;
}
private function popState(): void
{
if (0 === count($this->states)) {
throw new LogicException('Cannot pop state without a previous state.');
}
$this->state = array_pop($this->states);
}
private function checkBrackets(string $code): void
{
// opening bracket
if (in_array($code, $this->openingBrackets, true)) {
$this->brackets[] = [$code, $this->lineno];
} elseif (in_array($code, $this->closingBrackets, true)) {
// closing bracket
if (!$this->brackets) {
throw new SyntaxError(sprintf('Unexpected "%s".', $code), $this->lineno, $this->source);
}
[$expect, $lineno] = array_pop($this->brackets);
if ($code !== str_replace($this->openingBrackets, $this->closingBrackets, $expect)) {
throw new SyntaxError(sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
}
}
}
}