diff options
| author | Michael Save <savetheinternet@tinyboard.org> | 2012-04-09 20:52:26 +1000 |
|---|---|---|
| committer | Michael Save <savetheinternet@tinyboard.org> | 2012-04-09 20:52:26 +1000 |
| commit | 874b8cbf002e9d8bf0ff39671e1501165016320a (patch) | |
| tree | 1428acec23fef6c607e10fd355d88af31c2029ed /inc/contrib/Twig/Lexer.php | |
| parent | 69c9a9dd452299e0e8f7335966a1d0b4036df583 (diff) | |
inc/contrib -> inc/lib
Diffstat (limited to 'inc/contrib/Twig/Lexer.php')
| -rw-r--r-- | inc/contrib/Twig/Lexer.php | 328 |
1 files changed, 0 insertions, 328 deletions
diff --git a/inc/contrib/Twig/Lexer.php b/inc/contrib/Twig/Lexer.php deleted file mode 100644 index 868a814e..00000000 --- a/inc/contrib/Twig/Lexer.php +++ /dev/null @@ -1,328 +0,0 @@ -<?php - -/* - * This file is part of Twig. - * - * (c) 2009 Fabien Potencier - * (c) 2009 Armin Ronacher - * - * For the full copyright and license information, please view the LICENSE - * file that was distributed with this source code. - */ - -/** - * Lexes a template string. - * - * @package twig - * @author Fabien Potencier <fabien@symfony.com> - */ -class Twig_Lexer implements Twig_LexerInterface -{ - protected $tokens; - protected $code; - protected $cursor; - protected $lineno; - protected $end; - protected $state; - protected $brackets; - - protected $env; - protected $filename; - protected $options; - protected $operatorRegex; - - const STATE_DATA = 0; - const STATE_BLOCK = 1; - const STATE_VAR = 2; - - const REGEX_NAME = '/[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/A'; - const REGEX_NUMBER = '/[0-9]+(?:\.[0-9]+)?/A'; - const REGEX_STRING = '/"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As'; - const PUNCTUATION = '()[]{}?:.,|'; - - public function __construct(Twig_Environment $env, array $options = array()) - { - $this->env = $env; - - $this->options = array_merge(array( - 'tag_comment' => array('{#', '#}'), - 'tag_block' => array('{%', '%}'), - 'tag_variable' => array('{{', '}}'), - 'whitespace_trim' => '-', - ), $options); - } - - /** - * Tokenizes a source code. - * - * @param string $code The source code - * @param string $filename A unique identifier for the source code - * - * @return Twig_TokenStream A token stream instance - */ - public function tokenize($code, $filename = null) - { - if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2) { - $mbEncoding = mb_internal_encoding(); - mb_internal_encoding('ASCII'); - } - - $this->code = str_replace(array("\r\n", "\r"), "\n", $code); - $this->filename = $filename; - $this->cursor = 0; - $this->lineno = 1; - $this->end = strlen($this->code); - $this->tokens = array(); - $this->state = self::STATE_DATA; - $this->brackets = array(); - - while ($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; - } - } - - $this->pushToken(Twig_Token::EOF_TYPE); - - if (!empty($this->brackets)) { - list($expect, $lineno) = array_pop($this->brackets); - throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename); - } - - if (isset($mbEncoding)) { - mb_internal_encoding($mbEncoding); - } - - return new Twig_TokenStream($this->tokens, $this->filename); - } - - protected function lexData() - { - $pos = $this->end; - $append = ''; - - // Find the first token after the cursor - foreach (array('tag_comment', 'tag_variable', 'tag_block') as $type) { - $tmpPos = strpos($this->code, $this->options[$type][0], $this->cursor); - if (false !== $tmpPos && $tmpPos < $pos) { - $trimBlock = false; - $append = ''; - $pos = $tmpPos; - $token = $this->options[$type][0]; - if (strpos($this->code, $this->options['whitespace_trim'], $pos) === ($pos + strlen($token))) { - $trimBlock = true; - $append = $this->options['whitespace_trim']; - } - } - } - - // if no matches are left we return the rest of the template as simple text token - if ($pos === $this->end) { - $this->pushToken(Twig_Token::TEXT_TYPE, substr($this->code, $this->cursor)); - $this->cursor = $this->end; - return; - } - - // push the template text first - $text = $textContent = substr($this->code, $this->cursor, $pos - $this->cursor); - if (true === $trimBlock) { - $text = rtrim($text); - } - $this->pushToken(Twig_Token::TEXT_TYPE, $text); - $this->moveCursor($textContent.$token.$append); - - switch ($token) { - case $this->options['tag_comment'][0]: - $this->lexComment(); - break; - - case $this->options['tag_block'][0]: - // raw data? - if (preg_match('/\s*raw\s*'.preg_quote($this->options['tag_block'][1], '/').'/As', $this->code, $match, null, $this->cursor)) { - $this->moveCursor($match[0]); - $this->lexRawData(); - $this->state = self::STATE_DATA; - // {% line \d+ %} - } else if (preg_match('/\s*line\s+(\d+)\s*'.preg_quote($this->options['tag_block'][1], '/').'/As', $this->code, $match, null, $this->cursor)) { - $this->moveCursor($match[0]); - $this->lineno = (int) $match[1]; - $this->state = self::STATE_DATA; - } else { - $this->pushToken(Twig_Token::BLOCK_START_TYPE); - $this->state = self::STATE_BLOCK; - } - break; - - case $this->options['tag_variable'][0]: - $this->pushToken(Twig_Token::VAR_START_TYPE); - $this->state = self::STATE_VAR; - break; - } - } - - protected function lexBlock() - { - $trimTag = preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/'); - $endTag = preg_quote($this->options['tag_block'][1], '/'); - - if (empty($this->brackets) && preg_match('/\s*(?:'.$trimTag.'\s*|\s*'.$endTag.')\n?/A', $this->code, $match, null, $this->cursor)) { - $this->pushToken(Twig_Token::BLOCK_END_TYPE); - $this->moveCursor($match[0]); - $this->state = self::STATE_DATA; - } else { - $this->lexExpression(); - } - } - - protected function lexVar() - { - $trimTag = preg_quote($this->options['whitespace_trim'].$this->options['tag_variable'][1], '/'); - $endTag = preg_quote($this->options['tag_variable'][1], '/'); - - if (empty($this->brackets) && preg_match('/\s*'.$trimTag.'\s*|\s*'.$endTag.'/A', $this->code, $match, null, $this->cursor)) { - $this->pushToken(Twig_Token::VAR_END_TYPE); - $this->moveCursor($match[0]); - $this->state = self::STATE_DATA; - } else { - $this->lexExpression(); - } - } - - protected function lexExpression() - { - // whitespace - if (preg_match('/\s+/A', $this->code, $match, null, $this->cursor)) { - $this->moveCursor($match[0]); - - if ($this->cursor >= $this->end) { - throw new Twig_Error_Syntax(sprintf('Unexpected end of file: Unclosed "%s"', $this->state === self::STATE_BLOCK ? 'block' : 'variable')); - } - } - - // operators - if (preg_match($this->getOperatorRegex(), $this->code, $match, null, $this->cursor)) { - $this->pushToken(Twig_Token::OPERATOR_TYPE, $match[0]); - $this->moveCursor($match[0]); - } - // names - elseif (preg_match(self::REGEX_NAME, $this->code, $match, null, $this->cursor)) { - $this->pushToken(Twig_Token::NAME_TYPE, $match[0]); - $this->moveCursor($match[0]); - } - // numbers - elseif (preg_match(self::REGEX_NUMBER, $this->code, $match, null, $this->cursor)) { - $this->pushToken(Twig_Token::NUMBER_TYPE, ctype_digit($match[0]) ? (int) $match[0] : (float) $match[0]); - $this->moveCursor($match[0]); - } - // punctuation - elseif (false !== strpos(self::PUNCTUATION, $this->code[$this->cursor])) { - // opening bracket - if (false !== strpos('([{', $this->code[$this->cursor])) { - $this->brackets[] = array($this->code[$this->cursor], $this->lineno); - } - // closing bracket - elseif (false !== strpos(')]}', $this->code[$this->cursor])) { - if (empty($this->brackets)) { - throw new Twig_Error_Syntax(sprintf('Unexpected "%s"', $this->code[$this->cursor]), $this->lineno, $this->filename); - } - - list($expect, $lineno) = array_pop($this->brackets); - if ($this->code[$this->cursor] != strtr($expect, '([{', ')]}')) { - throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename); - } - } - - $this->pushToken(Twig_Token::PUNCTUATION_TYPE, $this->code[$this->cursor]); - ++$this->cursor; - } - // strings - elseif (preg_match(self::REGEX_STRING, $this->code, $match, null, $this->cursor)) { - $this->pushToken(Twig_Token::STRING_TYPE, stripcslashes(substr($match[0], 1, -1))); - $this->moveCursor($match[0]); - } - // unlexable - else { - throw new Twig_Error_Syntax(sprintf('Unexpected character "%s"', $this->code[$this->cursor]), $this->lineno, $this->filename); - } - } - - protected function lexRawData() - { - if (!preg_match('/'.preg_quote($this->options['tag_block'][0], '/').'\s*endraw\s*'.preg_quote($this->options['tag_block'][1], '/').'/s', $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) { - throw new Twig_Error_Syntax(sprintf('Unexpected end of file: Unclosed "block"')); - } - $text = substr($this->code, $this->cursor, $match[0][1] - $this->cursor); - $this->pushToken(Twig_Token::TEXT_TYPE, $text); - $this->moveCursor($text.$match[0][0]); - } - - protected function lexComment() - { - $commentEndRegex = '/(?:'.preg_quote($this->options['whitespace_trim'], '/') - .preg_quote($this->options['tag_comment'][1], '/').'\s*|' - .preg_quote($this->options['tag_comment'][1], '/').')\n?/s'; - - if (!preg_match($commentEndRegex, $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) { - throw new Twig_Error_Syntax('Unclosed comment', $this->lineno, $this->filename); - } - - $this->moveCursor(substr($this->code, $this->cursor, $match[0][1] - $this->cursor).$match[0][0]); - } - - protected function pushToken($type, $value = '') - { - // do not push empty text tokens - if (Twig_Token::TEXT_TYPE === $type && '' === $value) { - return; - } - - $this->tokens[] = new Twig_Token($type, $value, $this->lineno); - } - - protected function moveCursor($text) - { - $this->cursor += strlen($text); - $this->lineno += substr_count($text, "\n"); - } - - protected function getOperatorRegex() - { - if (null !== $this->operatorRegex) { - return $this->operatorRegex; - } - - $operators = array_merge( - array('='), - array_keys($this->env->getUnaryOperators()), - array_keys($this->env->getBinaryOperators()) - ); - - $operators = array_combine($operators, array_map('strlen', $operators)); - arsort($operators); - - $regex = array(); - foreach ($operators as $operator => $length) { - // an operator that ends with a character must be followed by - // a whitespace or a parenthesis - if (ctype_alpha($operator[$length - 1])) { - $regex[] = preg_quote($operator, '/').'(?=[ ()])'; - } else { - $regex[] = preg_quote($operator, '/'); - } - } - - return $this->operatorRegex = '/'.implode('|', $regex).'/A'; - } -} |
