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<?php |
| 2 |
|
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/* |
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* This file is part of Twig. |
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* |
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* (c) Fabien Potencier |
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* (c) Armin Ronacher |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace ElementorDeps\Twig; |
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|
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use ElementorDeps\Twig\Error\SyntaxError; |
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/** |
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* @author Fabien Potencier <fabien@symfony.com> |
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*/ |
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class Lexer |
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{ |
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private $isInitialized = \false; |
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private $tokens; |
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private $code; |
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private $cursor; |
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private $lineno; |
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private $end; |
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private $state; |
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private $states; |
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private $brackets; |
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private $env; |
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private $source; |
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private $options; |
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private $regexes; |
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private $position; |
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private $positions; |
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private $currentVarBlockLine; |
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public const STATE_DATA = 0; |
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public const STATE_BLOCK = 1; |
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public const STATE_VAR = 2; |
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public const STATE_STRING = 3; |
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public const STATE_INTERPOLATION = 4; |
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public const REGEX_NAME = '/[a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*/A'; |
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public const REGEX_NUMBER = '/[0-9]+(?:\\.[0-9]+)?([Ee][\\+\\-][0-9]+)?/A'; |
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public const REGEX_STRING = '/"([^#"\\\\]*(?:\\\\.[^#"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As'; |
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public const REGEX_DQ_STRING_DELIM = '/"/A'; |
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public const REGEX_DQ_STRING_PART = '/[^#"\\\\]*(?:(?:\\\\.|#(?!\\{))[^#"\\\\]*)*/As'; |
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public const PUNCTUATION = '()[]{}?:.,|'; |
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public function __construct(Environment $env, array $options = []) |
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{ |
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$this->env = $env; |
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$this->options = \array_merge(['tag_comment' => ['{#', '#}'], 'tag_block' => ['{%', '%}'], 'tag_variable' => ['{{', '}}'], 'whitespace_trim' => '-', 'whitespace_line_trim' => '~', 'whitespace_line_chars' => ' \\t\\0\\x0B', 'interpolation' => ['#{', '}']], $options); |
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} |
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private function initialize() |
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{ |
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if ($this->isInitialized) { |
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return; |
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} |
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// 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 |
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$this->regexes = [ |
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// }} |
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'lex_var' => '{ |
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\\s* |
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(?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_variable'][1], '#') . '\\s*' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_variable'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_variable'][1], '#') . ') |
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}Ax', |
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// %} |
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'lex_block' => '{ |
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\\s* |
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(?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_block'][1], '#') . '\\s*\\n?' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_block'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_block'][1], '#') . '\\n?' . ') |
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}Ax', |
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// {% endverbatim %} |
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'lex_raw_data' => '{' . \preg_quote($this->options['tag_block'][0], '#') . '(' . $this->options['whitespace_trim'] . '|' . $this->options['whitespace_line_trim'] . ')?\\s*endverbatim\\s*' . '(?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_block'][1], '#') . '\\s*' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_block'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_block'][1], '#') . ') |
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}sx', |
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'operator' => $this->getOperatorRegex(), |
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// #} |
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'lex_comment' => '{ |
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(?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_comment'][1], '#') . '\\s*\\n?' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_comment'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_comment'][1], '#') . '\\n?' . ') |
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}sx', |
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// verbatim %} |
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'lex_block_raw' => '{ |
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\\s*verbatim\\s* |
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(?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_block'][1], '#') . '\\s*' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_block'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_block'][1], '#') . ') |
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}Asx', |
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'lex_block_line' => '{\\s*line\\s+(\\d+)\\s*' . \preg_quote($this->options['tag_block'][1], '#') . '}As', |
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// {{ or {% or {# |
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'lex_tokens_start' => '{ |
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(' . \preg_quote($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'], '#') . ')? |
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}sx', |
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'interpolation_start' => '{' . \preg_quote($this->options['interpolation'][0], '#') . '\\s*}A', |
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'interpolation_end' => '{\\s*' . \preg_quote($this->options['interpolation'][1], '#') . '}A', |
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]; |
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$this->isInitialized = \true; |
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} |
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public function tokenize(Source $source) : TokenStream |
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{ |
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$this->initialize(); |
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$this->source = $source; |
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$this->code = \str_replace(["\r\n", "\r"], "\n", $source->getCode()); |
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$this->cursor = 0; |
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$this->lineno = 1; |
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$this->end = \strlen($this->code); |
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$this->tokens = []; |
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$this->state = self::STATE_DATA; |
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$this->states = []; |
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$this->brackets = []; |
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$this->position = -1; |
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// find all token starts in one go |
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\preg_match_all($this->regexes['lex_tokens_start'], $this->code, $matches, \PREG_OFFSET_CAPTURE); |
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$this->positions = $matches; |
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while ($this->cursor < $this->end) { |
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// dispatch to the lexing functions depending |
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// on the current state |
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switch ($this->state) { |
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case self::STATE_DATA: |
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$this->lexData(); |
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break; |
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case self::STATE_BLOCK: |
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$this->lexBlock(); |
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break; |
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case self::STATE_VAR: |
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$this->lexVar(); |
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break; |
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case self::STATE_STRING: |
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$this->lexString(); |
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break; |
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case self::STATE_INTERPOLATION: |
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$this->lexInterpolation(); |
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break; |
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} |
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} |
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$this->pushToken( |
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/* Token::EOF_TYPE */ |
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-1 |
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); |
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if (!empty($this->brackets)) { |
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[$expect, $lineno] = \array_pop($this->brackets); |
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throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source); |
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} |
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return new TokenStream($this->tokens, $this->source); |
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} |
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private function lexData() : void |
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{ |
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// if no matches are left we return the rest of the template as simple text token |
| 142 |
if ($this->position == \count($this->positions[0]) - 1) { |
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$this->pushToken( |
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/* Token::TEXT_TYPE */ |
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0, |
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\substr($this->code, $this->cursor) |
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); |
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$this->cursor = $this->end; |
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return; |
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} |
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// Find the first token after the current cursor |
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$position = $this->positions[0][++$this->position]; |
| 153 |
while ($position[1] < $this->cursor) { |
| 154 |
if ($this->position == \count($this->positions[0]) - 1) { |
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return; |
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} |
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$position = $this->positions[0][++$this->position]; |
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} |
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// push the template text first |
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$text = $textContent = \substr($this->code, $this->cursor, $position[1] - $this->cursor); |
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// trim? |
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if (isset($this->positions[2][$this->position][0])) { |
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if ($this->options['whitespace_trim'] === $this->positions[2][$this->position][0]) { |
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// whitespace_trim detected ({%-, {{- or {#-) |
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$text = \rtrim($text); |
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} elseif ($this->options['whitespace_line_trim'] === $this->positions[2][$this->position][0]) { |
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// whitespace_line_trim detected ({%~, {{~ or {#~) |
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// don't trim \r and \n |
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$text = \rtrim($text, " \t\x00\v"); |
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} |
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} |
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$this->pushToken( |
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/* Token::TEXT_TYPE */ |
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0, |
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$text |
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); |
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$this->moveCursor($textContent . $position[0]); |
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switch ($this->positions[1][$this->position][0]) { |
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case $this->options['tag_comment'][0]: |
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$this->lexComment(); |
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break; |
| 182 |
case $this->options['tag_block'][0]: |
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// raw data? |
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if (\preg_match($this->regexes['lex_block_raw'], $this->code, $match, 0, $this->cursor)) { |
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$this->moveCursor($match[0]); |
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$this->lexRawData(); |
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// {% line \d+ %} |
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} elseif (\preg_match($this->regexes['lex_block_line'], $this->code, $match, 0, $this->cursor)) { |
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$this->moveCursor($match[0]); |
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$this->lineno = (int) $match[1]; |
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} else { |
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$this->pushToken( |
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/* Token::BLOCK_START_TYPE */ |
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1 |
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); |
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$this->pushState(self::STATE_BLOCK); |
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$this->currentVarBlockLine = $this->lineno; |
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} |
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break; |
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case $this->options['tag_variable'][0]: |
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$this->pushToken( |
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/* Token::VAR_START_TYPE */ |
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2 |
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); |
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$this->pushState(self::STATE_VAR); |
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$this->currentVarBlockLine = $this->lineno; |
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break; |
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} |
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} |
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private function lexBlock() : void |
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{ |
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if (empty($this->brackets) && \preg_match($this->regexes['lex_block'], $this->code, $match, 0, $this->cursor)) { |
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$this->pushToken( |
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/* Token::BLOCK_END_TYPE */ |
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3 |
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); |
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$this->moveCursor($match[0]); |
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$this->popState(); |
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} else { |
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$this->lexExpression(); |
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} |
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} |
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private function lexVar() : void |
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{ |
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if (empty($this->brackets) && \preg_match($this->regexes['lex_var'], $this->code, $match, 0, $this->cursor)) { |
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$this->pushToken( |
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/* Token::VAR_END_TYPE */ |
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4 |
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); |
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$this->moveCursor($match[0]); |
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$this->popState(); |
| 232 |
} else { |
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$this->lexExpression(); |
| 234 |
} |
| 235 |
} |
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private function lexExpression() : void |
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{ |
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// whitespace |
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if (\preg_match('/\\s+/A', $this->code, $match, 0, $this->cursor)) { |
| 240 |
$this->moveCursor($match[0]); |
| 241 |
if ($this->cursor >= $this->end) { |
| 242 |
throw new SyntaxError(\sprintf('Unclosed "%s".', self::STATE_BLOCK === $this->state ? 'block' : 'variable'), $this->currentVarBlockLine, $this->source); |
| 243 |
} |
| 244 |
} |
| 245 |
// spread operator |
| 246 |
if ('.' === $this->code[$this->cursor] && $this->cursor + 2 < $this->end && '.' === $this->code[$this->cursor + 1] && '.' === $this->code[$this->cursor + 2]) { |
| 247 |
$this->pushToken(Token::SPREAD_TYPE, '...'); |
| 248 |
$this->moveCursor('...'); |
| 249 |
} elseif ('=' === $this->code[$this->cursor] && $this->cursor + 1 < $this->end && '>' === $this->code[$this->cursor + 1]) { |
| 250 |
$this->pushToken(Token::ARROW_TYPE, '=>'); |
| 251 |
$this->moveCursor('=>'); |
| 252 |
} elseif (\preg_match($this->regexes['operator'], $this->code, $match, 0, $this->cursor)) { |
| 253 |
$this->pushToken( |
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/* Token::OPERATOR_TYPE */ |
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8, |
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\preg_replace('/\\s+/', ' ', $match[0]) |
| 257 |
); |
| 258 |
$this->moveCursor($match[0]); |
| 259 |
} elseif (\preg_match(self::REGEX_NAME, $this->code, $match, 0, $this->cursor)) { |
| 260 |
$this->pushToken( |
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/* Token::NAME_TYPE */ |
| 262 |
5, |
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$match[0] |
| 264 |
); |
| 265 |
$this->moveCursor($match[0]); |
| 266 |
} elseif (\preg_match(self::REGEX_NUMBER, $this->code, $match, 0, $this->cursor)) { |
| 267 |
$number = (float) $match[0]; |
| 268 |
// floats |
| 269 |
if (\ctype_digit($match[0]) && $number <= \PHP_INT_MAX) { |
| 270 |
$number = (int) $match[0]; |
| 271 |
// integers lower than the maximum |
| 272 |
} |
| 273 |
$this->pushToken( |
| 274 |
/* Token::NUMBER_TYPE */ |
| 275 |
6, |
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$number |
| 277 |
); |
| 278 |
$this->moveCursor($match[0]); |
| 279 |
} elseif (\str_contains(self::PUNCTUATION, $this->code[$this->cursor])) { |
| 280 |
// opening bracket |
| 281 |
if (\str_contains('([{', $this->code[$this->cursor])) { |
| 282 |
$this->brackets[] = [$this->code[$this->cursor], $this->lineno]; |
| 283 |
} elseif (\str_contains(')]}', $this->code[$this->cursor])) { |
| 284 |
if (empty($this->brackets)) { |
| 285 |
throw new SyntaxError(\sprintf('Unexpected "%s".', $this->code[$this->cursor]), $this->lineno, $this->source); |
| 286 |
} |
| 287 |
[$expect, $lineno] = \array_pop($this->brackets); |
| 288 |
if ($this->code[$this->cursor] != \strtr($expect, '([{', ')]}')) { |
| 289 |
throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source); |
| 290 |
} |
| 291 |
} |
| 292 |
$this->pushToken( |
| 293 |
/* Token::PUNCTUATION_TYPE */ |
| 294 |
9, |
| 295 |
$this->code[$this->cursor] |
| 296 |
); |
| 297 |
++$this->cursor; |
| 298 |
} elseif (\preg_match(self::REGEX_STRING, $this->code, $match, 0, $this->cursor)) { |
| 299 |
$this->pushToken( |
| 300 |
/* Token::STRING_TYPE */ |
| 301 |
7, |
| 302 |
\stripcslashes(\substr($match[0], 1, -1)) |
| 303 |
); |
| 304 |
$this->moveCursor($match[0]); |
| 305 |
} elseif (\preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) { |
| 306 |
$this->brackets[] = ['"', $this->lineno]; |
| 307 |
$this->pushState(self::STATE_STRING); |
| 308 |
$this->moveCursor($match[0]); |
| 309 |
} else { |
| 310 |
throw new SyntaxError(\sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source); |
| 311 |
} |
| 312 |
} |
| 313 |
private function lexRawData() : void |
| 314 |
{ |
| 315 |
if (!\preg_match($this->regexes['lex_raw_data'], $this->code, $match, \PREG_OFFSET_CAPTURE, $this->cursor)) { |
| 316 |
throw new SyntaxError('Unexpected end of file: Unclosed "verbatim" block.', $this->lineno, $this->source); |
| 317 |
} |
| 318 |
$text = \substr($this->code, $this->cursor, $match[0][1] - $this->cursor); |
| 319 |
$this->moveCursor($text . $match[0][0]); |
| 320 |
// trim? |
| 321 |
if (isset($match[1][0])) { |
| 322 |
if ($this->options['whitespace_trim'] === $match[1][0]) { |
| 323 |
// whitespace_trim detected ({%-, {{- or {#-) |
| 324 |
$text = \rtrim($text); |
| 325 |
} else { |
| 326 |
// whitespace_line_trim detected ({%~, {{~ or {#~) |
| 327 |
// don't trim \r and \n |
| 328 |
$text = \rtrim($text, " \t\x00\v"); |
| 329 |
} |
| 330 |
} |
| 331 |
$this->pushToken( |
| 332 |
/* Token::TEXT_TYPE */ |
| 333 |
0, |
| 334 |
$text |
| 335 |
); |
| 336 |
} |
| 337 |
private function lexComment() : void |
| 338 |
{ |
| 339 |
if (!\preg_match($this->regexes['lex_comment'], $this->code, $match, \PREG_OFFSET_CAPTURE, $this->cursor)) { |
| 340 |
throw new SyntaxError('Unclosed comment.', $this->lineno, $this->source); |
| 341 |
} |
| 342 |
$this->moveCursor(\substr($this->code, $this->cursor, $match[0][1] - $this->cursor) . $match[0][0]); |
| 343 |
} |
| 344 |
private function lexString() : void |
| 345 |
{ |
| 346 |
if (\preg_match($this->regexes['interpolation_start'], $this->code, $match, 0, $this->cursor)) { |
| 347 |
$this->brackets[] = [$this->options['interpolation'][0], $this->lineno]; |
| 348 |
$this->pushToken( |
| 349 |
/* Token::INTERPOLATION_START_TYPE */ |
| 350 |
10 |
| 351 |
); |
| 352 |
$this->moveCursor($match[0]); |
| 353 |
$this->pushState(self::STATE_INTERPOLATION); |
| 354 |
} elseif (\preg_match(self::REGEX_DQ_STRING_PART, $this->code, $match, 0, $this->cursor) && '' !== $match[0]) { |
| 355 |
$this->pushToken( |
| 356 |
/* Token::STRING_TYPE */ |
| 357 |
7, |
| 358 |
\stripcslashes($match[0]) |
| 359 |
); |
| 360 |
$this->moveCursor($match[0]); |
| 361 |
} elseif (\preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) { |
| 362 |
[$expect, $lineno] = \array_pop($this->brackets); |
| 363 |
if ('"' != $this->code[$this->cursor]) { |
| 364 |
throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source); |
| 365 |
} |
| 366 |
$this->popState(); |
| 367 |
++$this->cursor; |
| 368 |
} else { |
| 369 |
// unlexable |
| 370 |
throw new SyntaxError(\sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source); |
| 371 |
} |
| 372 |
} |
| 373 |
private function lexInterpolation() : void |
| 374 |
{ |
| 375 |
$bracket = \end($this->brackets); |
| 376 |
if ($this->options['interpolation'][0] === $bracket[0] && \preg_match($this->regexes['interpolation_end'], $this->code, $match, 0, $this->cursor)) { |
| 377 |
\array_pop($this->brackets); |
| 378 |
$this->pushToken( |
| 379 |
/* Token::INTERPOLATION_END_TYPE */ |
| 380 |
11 |
| 381 |
); |
| 382 |
$this->moveCursor($match[0]); |
| 383 |
$this->popState(); |
| 384 |
} else { |
| 385 |
$this->lexExpression(); |
| 386 |
} |
| 387 |
} |
| 388 |
private function pushToken($type, $value = '') : void |
| 389 |
{ |
| 390 |
// do not push empty text tokens |
| 391 |
if (0 === $type && '' === $value) { |
| 392 |
return; |
| 393 |
} |
| 394 |
$this->tokens[] = new Token($type, $value, $this->lineno); |
| 395 |
} |
| 396 |
private function moveCursor($text) : void |
| 397 |
{ |
| 398 |
$this->cursor += \strlen($text); |
| 399 |
$this->lineno += \substr_count($text, "\n"); |
| 400 |
} |
| 401 |
private function getOperatorRegex() : string |
| 402 |
{ |
| 403 |
$operators = \array_merge(['='], \array_keys($this->env->getUnaryOperators()), \array_keys($this->env->getBinaryOperators())); |
| 404 |
$operators = \array_combine($operators, \array_map('strlen', $operators)); |
| 405 |
\arsort($operators); |
| 406 |
$regex = []; |
| 407 |
foreach ($operators as $operator => $length) { |
| 408 |
// an operator that ends with a character must be followed by |
| 409 |
// a whitespace, a parenthesis, an opening map [ or sequence { |
| 410 |
$r = \preg_quote($operator, '/'); |
| 411 |
if (\ctype_alpha($operator[$length - 1])) { |
| 412 |
$r .= '(?=[\\s()\\[{])'; |
| 413 |
} |
| 414 |
// an operator that begins with a character must not have a dot or pipe before |
| 415 |
if (\ctype_alpha($operator[0])) { |
| 416 |
$r = '(?<![\\.\\|])' . $r; |
| 417 |
} |
| 418 |
// an operator with a space can be any amount of whitespaces |
| 419 |
$r = \preg_replace('/\\s+/', '\\s+', $r); |
| 420 |
$regex[] = $r; |
| 421 |
} |
| 422 |
return '/' . \implode('|', $regex) . '/A'; |
| 423 |
} |
| 424 |
private function pushState($state) : void |
| 425 |
{ |
| 426 |
$this->states[] = $this->state; |
| 427 |
$this->state = $state; |
| 428 |
} |
| 429 |
private function popState() : void |
| 430 |
{ |
| 431 |
if (0 === \count($this->states)) { |
| 432 |
throw new \LogicException('Cannot pop state without a previous state.'); |
| 433 |
} |
| 434 |
$this->state = \array_pop($this->states); |
| 435 |
} |
| 436 |
} |
| 437 |
|
