mirror of
https://github.com/vichan-devel/vichan.git
synced 2024-12-05 04:18:03 +01:00
408 lines
16 KiB
PHP
408 lines
16 KiB
PHP
<?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.
|
|
*
|
|
* @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 $states;
|
|
protected $brackets;
|
|
protected $env;
|
|
protected $filename;
|
|
protected $options;
|
|
protected $regexes;
|
|
protected $position;
|
|
protected $positions;
|
|
protected $currentVarBlockLine;
|
|
|
|
const STATE_DATA = 0;
|
|
const STATE_BLOCK = 1;
|
|
const STATE_VAR = 2;
|
|
const STATE_STRING = 3;
|
|
const STATE_INTERPOLATION = 4;
|
|
|
|
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 REGEX_DQ_STRING_DELIM = '/"/A';
|
|
const REGEX_DQ_STRING_PART = '/[^#"\\\\]*(?:(?:\\\\.|#(?!\{))[^#"\\\\]*)*/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' => '-',
|
|
'interpolation' => array('#{', '}'),
|
|
), $options);
|
|
|
|
$this->regexes = array(
|
|
'lex_var' => '/\s*'.preg_quote($this->options['whitespace_trim'].$this->options['tag_variable'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_variable'][1], '/').'/A',
|
|
'lex_block' => '/\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')\n?/A',
|
|
'lex_raw_data' => '/('.preg_quote($this->options['tag_block'][0].$this->options['whitespace_trim'], '/').'|'.preg_quote($this->options['tag_block'][0], '/').')\s*(?:end%s)\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')/s',
|
|
'operator' => $this->getOperatorRegex(),
|
|
'lex_comment' => '/(?:'.preg_quote($this->options['whitespace_trim'], '/').preg_quote($this->options['tag_comment'][1], '/').'\s*|'.preg_quote($this->options['tag_comment'][1], '/').')\n?/s',
|
|
'lex_block_raw' => '/\s*(raw|verbatim)\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')/As',
|
|
'lex_block_line' => '/\s*line\s+(\d+)\s*'.preg_quote($this->options['tag_block'][1], '/').'/As',
|
|
'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'], '/').')?/s',
|
|
'interpolation_start' => '/'.preg_quote($this->options['interpolation'][0], '/').'\s*/A',
|
|
'interpolation_end' => '/\s*'.preg_quote($this->options['interpolation'][1], '/').'/A',
|
|
);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
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');
|
|
} else {
|
|
$mbEncoding = null;
|
|
}
|
|
|
|
$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->states = array();
|
|
$this->brackets = array();
|
|
$this->position = -1;
|
|
|
|
// find all token starts in one go
|
|
preg_match_all($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;
|
|
}
|
|
}
|
|
|
|
$this->pushToken(Twig_Token::EOF_TYPE);
|
|
|
|
if (!empty($this->brackets)) {
|
|
list($expect, $lineno) = array_pop($this->brackets);
|
|
throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename);
|
|
}
|
|
|
|
if ($mbEncoding) {
|
|
mb_internal_encoding($mbEncoding);
|
|
}
|
|
|
|
return new Twig_TokenStream($this->tokens, $this->filename);
|
|
}
|
|
|
|
protected function lexData()
|
|
{
|
|
// if no matches are left we return the rest of the template as simple text token
|
|
if ($this->position == count($this->positions[0]) - 1) {
|
|
$this->pushToken(Twig_Token::TEXT_TYPE, substr($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] - $this->cursor);
|
|
if (isset($this->positions[2][$this->position][0])) {
|
|
$text = rtrim($text);
|
|
}
|
|
$this->pushToken(Twig_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, null, $this->cursor)) {
|
|
$this->moveCursor($match[0]);
|
|
$this->lexRawData($match[1]);
|
|
// {% line \d+ %}
|
|
} elseif (preg_match($this->regexes['lex_block_line'], $this->code, $match, null, $this->cursor)) {
|
|
$this->moveCursor($match[0]);
|
|
$this->lineno = (int) $match[1];
|
|
} else {
|
|
$this->pushToken(Twig_Token::BLOCK_START_TYPE);
|
|
$this->pushState(self::STATE_BLOCK);
|
|
$this->currentVarBlockLine = $this->lineno;
|
|
}
|
|
break;
|
|
|
|
case $this->options['tag_variable'][0]:
|
|
$this->pushToken(Twig_Token::VAR_START_TYPE);
|
|
$this->pushState(self::STATE_VAR);
|
|
$this->currentVarBlockLine = $this->lineno;
|
|
break;
|
|
}
|
|
}
|
|
|
|
protected function lexBlock()
|
|
{
|
|
if (empty($this->brackets) && preg_match($this->regexes['lex_block'], $this->code, $match, null, $this->cursor)) {
|
|
$this->pushToken(Twig_Token::BLOCK_END_TYPE);
|
|
$this->moveCursor($match[0]);
|
|
$this->popState();
|
|
} else {
|
|
$this->lexExpression();
|
|
}
|
|
}
|
|
|
|
protected function lexVar()
|
|
{
|
|
if (empty($this->brackets) && preg_match($this->regexes['lex_var'], $this->code, $match, null, $this->cursor)) {
|
|
$this->pushToken(Twig_Token::VAR_END_TYPE);
|
|
$this->moveCursor($match[0]);
|
|
$this->popState();
|
|
} 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('Unclosed "%s"', $this->state === self::STATE_BLOCK ? 'block' : 'variable'), $this->currentVarBlockLine, $this->filename);
|
|
}
|
|
}
|
|
|
|
// operators
|
|
if (preg_match($this->regexes['operator'], $this->code, $match, null, $this->cursor)) {
|
|
$this->pushToken(Twig_Token::OPERATOR_TYPE, preg_replace('/\s+/', ' ', $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)) {
|
|
$number = (float) $match[0]; // floats
|
|
if (ctype_digit($match[0]) && $number <= PHP_INT_MAX) {
|
|
$number = (int) $match[0]; // integers lower than the maximum
|
|
}
|
|
$this->pushToken(Twig_Token::NUMBER_TYPE, $number);
|
|
$this->moveCursor($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]);
|
|
}
|
|
// opening double quoted string
|
|
elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
|
|
$this->brackets[] = array('"', $this->lineno);
|
|
$this->pushState(self::STATE_STRING);
|
|
$this->moveCursor($match[0]);
|
|
}
|
|
// unlexable
|
|
else {
|
|
throw new Twig_Error_Syntax(sprintf('Unexpected character "%s"', $this->code[$this->cursor]), $this->lineno, $this->filename);
|
|
}
|
|
}
|
|
|
|
protected function lexRawData($tag)
|
|
{
|
|
if (!preg_match(str_replace('%s', $tag, $this->regexes['lex_raw_data']), $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
|
|
throw new Twig_Error_Syntax(sprintf('Unexpected end of file: Unclosed "%s" block', $tag), $this->lineno, $this->filename);
|
|
}
|
|
|
|
$text = substr($this->code, $this->cursor, $match[0][1] - $this->cursor);
|
|
$this->moveCursor($text.$match[0][0]);
|
|
|
|
if (false !== strpos($match[1][0], $this->options['whitespace_trim'])) {
|
|
$text = rtrim($text);
|
|
}
|
|
|
|
$this->pushToken(Twig_Token::TEXT_TYPE, $text);
|
|
}
|
|
|
|
protected function lexComment()
|
|
{
|
|
if (!preg_match($this->regexes['lex_comment'], $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 lexString()
|
|
{
|
|
if (preg_match($this->regexes['interpolation_start'], $this->code, $match, null, $this->cursor)) {
|
|
$this->brackets[] = array($this->options['interpolation'][0], $this->lineno);
|
|
$this->pushToken(Twig_Token::INTERPOLATION_START_TYPE);
|
|
$this->moveCursor($match[0]);
|
|
$this->pushState(self::STATE_INTERPOLATION);
|
|
} elseif (preg_match(self::REGEX_DQ_STRING_PART, $this->code, $match, null, $this->cursor) && strlen($match[0]) > 0) {
|
|
$this->pushToken(Twig_Token::STRING_TYPE, stripcslashes($match[0]));
|
|
$this->moveCursor($match[0]);
|
|
} elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
|
|
list($expect, $lineno) = array_pop($this->brackets);
|
|
if ($this->code[$this->cursor] != '"') {
|
|
throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename);
|
|
}
|
|
|
|
$this->popState();
|
|
++$this->cursor;
|
|
}
|
|
}
|
|
|
|
protected function lexInterpolation()
|
|
{
|
|
$bracket = end($this->brackets);
|
|
if ($this->options['interpolation'][0] === $bracket[0] && preg_match($this->regexes['interpolation_end'], $this->code, $match, null, $this->cursor)) {
|
|
array_pop($this->brackets);
|
|
$this->pushToken(Twig_Token::INTERPOLATION_END_TYPE);
|
|
$this->moveCursor($match[0]);
|
|
$this->popState();
|
|
} else {
|
|
$this->lexExpression();
|
|
}
|
|
}
|
|
|
|
protected function pushToken($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()
|
|
{
|
|
$operators = array_merge(
|
|
array('='),
|
|
array_keys($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])) {
|
|
$r = preg_quote($operator, '/').'(?=[\s()])';
|
|
} else {
|
|
$r = preg_quote($operator, '/');
|
|
}
|
|
|
|
// an operator with a space can be any amount of whitespaces
|
|
$r = preg_replace('/\s+/', '\s+', $r);
|
|
|
|
$regex[] = $r;
|
|
}
|
|
|
|
return '/'.implode('|', $regex).'/A';
|
|
}
|
|
|
|
protected function pushState($state)
|
|
{
|
|
$this->states[] = $this->state;
|
|
$this->state = $state;
|
|
}
|
|
|
|
protected function popState()
|
|
{
|
|
if (0 === count($this->states)) {
|
|
throw new Exception('Cannot pop state without a previous state');
|
|
}
|
|
|
|
$this->state = array_pop($this->states);
|
|
}
|
|
}
|