File "CSS.php"
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<?php
/**
* Tokenizes CSS code.
*
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer\Tokenizers;
use PHP_CodeSniffer\Config;
use PHP_CodeSniffer\Exceptions\TokenizerException;
use PHP_CodeSniffer\Util;
class CSS extends PHP
{
/**
* Initialise the tokenizer.
*
* Pre-checks the content to see if it looks minified.
*
* @param string $content The content to tokenize,
* @param \PHP_CodeSniffer\Config $config The config data for the run.
* @param string $eolChar The EOL char used in the content.
*
* @return void
* @throws \PHP_CodeSniffer\Exceptions\TokenizerException If the file appears to be minified.
*/
public function __construct($content, Config $config, $eolChar='\n')
{
if ($this->isMinifiedContent($content, $eolChar) === true) {
throw new TokenizerException('File appears to be minified and cannot be processed');
}
parent::__construct($content, $config, $eolChar);
}//end __construct()
/**
* Creates an array of tokens when given some CSS code.
*
* Uses the PHP tokenizer to do all the tricky work
*
* @param string $string The string to tokenize.
*
* @return array
*/
public function tokenize($string)
{
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** START CSS TOKENIZING 1ST PASS ***".PHP_EOL;
}
// If the content doesn't have an EOL char on the end, add one so
// the open and close tags we add are parsed correctly.
$eolAdded = false;
if (substr($string, (strlen($this->eolChar) * -1)) !== $this->eolChar) {
$string .= $this->eolChar;
$eolAdded = true;
}
$string = str_replace('<?php', '^PHPCS_CSS_T_OPEN_TAG^', $string);
$string = str_replace('?>', '^PHPCS_CSS_T_CLOSE_TAG^', $string);
$tokens = parent::tokenize('<?php '.$string.'?>');
$finalTokens = [];
$finalTokens[0] = [
'code' => T_OPEN_TAG,
'type' => 'T_OPEN_TAG',
'content' => '',
];
$newStackPtr = 1;
$numTokens = count($tokens);
$multiLineComment = false;
for ($stackPtr = 1; $stackPtr < $numTokens; $stackPtr++) {
$token = $tokens[$stackPtr];
// CSS files don't have lists, breaks etc, so convert these to
// standard strings early so they can be converted into T_STYLE
// tokens and joined with other strings if needed.
if ($token['code'] === T_BREAK
|| $token['code'] === T_LIST
|| $token['code'] === T_DEFAULT
|| $token['code'] === T_SWITCH
|| $token['code'] === T_FOR
|| $token['code'] === T_FOREACH
|| $token['code'] === T_WHILE
|| $token['code'] === T_DEC
|| $token['code'] === T_NEW
) {
$token['type'] = 'T_STRING';
$token['code'] = T_STRING;
}
$token['content'] = str_replace('^PHPCS_CSS_T_OPEN_TAG^', '<?php', $token['content']);
$token['content'] = str_replace('^PHPCS_CSS_T_CLOSE_TAG^', '?>', $token['content']);
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $token['type'];
$content = Util\Common::prepareForOutput($token['content']);
echo "\tProcess token $stackPtr: $type => $content".PHP_EOL;
}
if ($token['code'] === T_BITWISE_XOR
&& $tokens[($stackPtr + 1)]['content'] === 'PHPCS_CSS_T_OPEN_TAG'
) {
$content = '<?php';
for ($stackPtr += 3; $stackPtr < $numTokens; $stackPtr++) {
if ($tokens[$stackPtr]['code'] === T_BITWISE_XOR
&& $tokens[($stackPtr + 1)]['content'] === 'PHPCS_CSS_T_CLOSE_TAG'
) {
// Add the end tag and ignore the * we put at the end.
$content .= '?>';
$stackPtr += 2;
break;
} else {
$content .= $tokens[$stackPtr]['content'];
}
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t=> Found embedded PHP code: ";
$cleanContent = Util\Common::prepareForOutput($content);
echo $cleanContent.PHP_EOL;
}
$finalTokens[$newStackPtr] = [
'type' => 'T_EMBEDDED_PHP',
'code' => T_EMBEDDED_PHP,
'content' => $content,
];
$newStackPtr++;
continue;
}//end if
if ($token['code'] === T_GOTO_LABEL) {
// Convert these back to T_STRING followed by T_COLON so we can
// more easily process style definitions.
$finalTokens[$newStackPtr] = [
'type' => 'T_STRING',
'code' => T_STRING,
'content' => substr($token['content'], 0, -1),
];
$newStackPtr++;
$finalTokens[$newStackPtr] = [
'type' => 'T_COLON',
'code' => T_COLON,
'content' => ':',
];
$newStackPtr++;
continue;
}
if ($token['code'] === T_FUNCTION) {
// There are no functions in CSS, so convert this to a string.
$finalTokens[$newStackPtr] = [
'type' => 'T_STRING',
'code' => T_STRING,
'content' => $token['content'],
];
$newStackPtr++;
continue;
}
if ($token['code'] === T_COMMENT
&& substr($token['content'], 0, 2) === '/*'
) {
// Multi-line comment. Record it so we can ignore other
// comment tags until we get out of this one.
$multiLineComment = true;
}
if ($token['code'] === T_COMMENT
&& $multiLineComment === false
&& (substr($token['content'], 0, 2) === '//'
|| $token['content'][0] === '#')
) {
$content = ltrim($token['content'], '#/');
// Guard against PHP7+ syntax errors by stripping
// leading zeros so the content doesn't look like an invalid int.
$leadingZero = false;
if ($content[0] === '0') {
$content = '1'.$content;
$leadingZero = true;
}
$commentTokens = parent::tokenize('<?php '.$content.'?>');
// The first and last tokens are the open/close tags.
array_shift($commentTokens);
array_pop($commentTokens);
if ($leadingZero === true) {
$commentTokens[0]['content'] = substr($commentTokens[0]['content'], 1);
$content = substr($content, 1);
}
if ($token['content'][0] === '#') {
// The # character is not a comment in CSS files, so
// determine what it means in this context.
$firstContent = $commentTokens[0]['content'];
// If the first content is just a number, it is probably a
// colour like 8FB7DB, which PHP splits into 8 and FB7DB.
if (($commentTokens[0]['code'] === T_LNUMBER
|| $commentTokens[0]['code'] === T_DNUMBER)
&& $commentTokens[1]['code'] === T_STRING
) {
$firstContent .= $commentTokens[1]['content'];
array_shift($commentTokens);
}
// If the first content looks like a colour and not a class
// definition, join the tokens together.
if (preg_match('/^[ABCDEF0-9]+$/i', $firstContent) === 1
&& $commentTokens[1]['content'] !== '-'
) {
array_shift($commentTokens);
// Work out what we trimmed off above and remember to re-add it.
$trimmed = substr($token['content'], 0, (strlen($token['content']) - strlen($content)));
$finalTokens[$newStackPtr] = [
'type' => 'T_COLOUR',
'code' => T_COLOUR,
'content' => $trimmed.$firstContent,
];
} else {
$finalTokens[$newStackPtr] = [
'type' => 'T_HASH',
'code' => T_HASH,
'content' => '#',
];
}
} else {
$finalTokens[$newStackPtr] = [
'type' => 'T_STRING',
'code' => T_STRING,
'content' => '//',
];
}//end if
$newStackPtr++;
array_splice($tokens, $stackPtr, 1, $commentTokens);
$numTokens = count($tokens);
$stackPtr--;
continue;
}//end if
if ($token['code'] === T_COMMENT
&& substr($token['content'], -2) === '*/'
) {
// Multi-line comment is done.
$multiLineComment = false;
}
$finalTokens[$newStackPtr] = $token;
$newStackPtr++;
}//end for
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** END CSS TOKENIZING 1ST PASS ***".PHP_EOL;
echo "\t*** START CSS TOKENIZING 2ND PASS ***".PHP_EOL;
}
// A flag to indicate if we are inside a style definition,
// which is defined using curly braces.
$inStyleDef = false;
// A flag to indicate if an At-rule like "@media" is used, which will result
// in nested curly brackets.
$asperandStart = false;
$numTokens = count($finalTokens);
for ($stackPtr = 0; $stackPtr < $numTokens; $stackPtr++) {
$token = $finalTokens[$stackPtr];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $token['type'];
$content = Util\Common::prepareForOutput($token['content']);
echo "\tProcess token $stackPtr: $type => $content".PHP_EOL;
}
switch ($token['code']) {
case T_OPEN_CURLY_BRACKET:
// Opening curly brackets for an At-rule do not start a style
// definition. We also reset the asperand flag here because the next
// opening curly bracket could be indeed the start of a style
// definition.
if ($asperandStart === true) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
if ($inStyleDef === true) {
echo "\t\t* style definition closed *".PHP_EOL;
}
if ($asperandStart === true) {
echo "\t\t* at-rule definition closed *".PHP_EOL;
}
}
$inStyleDef = false;
$asperandStart = false;
} else {
$inStyleDef = true;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* style definition opened *".PHP_EOL;
}
}
break;
case T_CLOSE_CURLY_BRACKET:
if (PHP_CODESNIFFER_VERBOSITY > 1) {
if ($inStyleDef === true) {
echo "\t\t* style definition closed *".PHP_EOL;
}
if ($asperandStart === true) {
echo "\t\t* at-rule definition closed *".PHP_EOL;
}
}
$inStyleDef = false;
$asperandStart = false;
break;
case T_MINUS:
// Minus signs are often used instead of spaces inside
// class names, IDs and styles.
if ($finalTokens[($stackPtr + 1)]['code'] === T_STRING) {
if ($finalTokens[($stackPtr - 1)]['code'] === T_STRING) {
$newContent = $finalTokens[($stackPtr - 1)]['content'].'-'.$finalTokens[($stackPtr + 1)]['content'];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* token is a string joiner; ignoring this and previous token".PHP_EOL;
$old = Util\Common::prepareForOutput($finalTokens[($stackPtr + 1)]['content']);
$new = Util\Common::prepareForOutput($newContent);
echo "\t\t=> token ".($stackPtr + 1)." content changed from \"$old\" to \"$new\"".PHP_EOL;
}
$finalTokens[($stackPtr + 1)]['content'] = $newContent;
unset($finalTokens[$stackPtr]);
unset($finalTokens[($stackPtr - 1)]);
} else {
$newContent = '-'.$finalTokens[($stackPtr + 1)]['content'];
$finalTokens[($stackPtr + 1)]['content'] = $newContent;
unset($finalTokens[$stackPtr]);
}
} else if ($finalTokens[($stackPtr + 1)]['code'] === T_LNUMBER) {
// They can also be used to provide negative numbers.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* token is part of a negative number; adding content to next token and ignoring *".PHP_EOL;
$content = Util\Common::prepareForOutput($finalTokens[($stackPtr + 1)]['content']);
echo "\t\t=> token ".($stackPtr + 1)." content changed from \"$content\" to \"-$content\"".PHP_EOL;
}
$finalTokens[($stackPtr + 1)]['content'] = '-'.$finalTokens[($stackPtr + 1)]['content'];
unset($finalTokens[$stackPtr]);
}//end if
break;
case T_COLON:
// Only interested in colons that are defining styles.
if ($inStyleDef === false) {
break;
}
for ($x = ($stackPtr - 1); $x >= 0; $x--) {
if (isset(Util\Tokens::$emptyTokens[$finalTokens[$x]['code']]) === false) {
break;
}
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $finalTokens[$x]['type'];
echo "\t\t=> token $x changed from $type to T_STYLE".PHP_EOL;
}
$finalTokens[$x]['type'] = 'T_STYLE';
$finalTokens[$x]['code'] = T_STYLE;
break;
case T_STRING:
if (strtolower($token['content']) === 'url') {
// Find the next content.
for ($x = ($stackPtr + 1); $x < $numTokens; $x++) {
if (isset(Util\Tokens::$emptyTokens[$finalTokens[$x]['code']]) === false) {
break;
}
}
// Needs to be in the format "url(" for it to be a URL.
if ($finalTokens[$x]['code'] !== T_OPEN_PARENTHESIS) {
continue 2;
}
// Make sure the content isn't empty.
for ($y = ($x + 1); $y < $numTokens; $y++) {
if (isset(Util\Tokens::$emptyTokens[$finalTokens[$y]['code']]) === false) {
break;
}
}
if ($finalTokens[$y]['code'] === T_CLOSE_PARENTHESIS) {
continue 2;
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
for ($i = ($stackPtr + 1); $i <= $y; $i++) {
$type = $finalTokens[$i]['type'];
$content = Util\Common::prepareForOutput($finalTokens[$i]['content']);
echo "\tProcess token $i: $type => $content".PHP_EOL;
}
echo "\t\t* token starts a URL *".PHP_EOL;
}
// Join all the content together inside the url() statement.
$newContent = '';
for ($i = ($x + 2); $i < $numTokens; $i++) {
if ($finalTokens[$i]['code'] === T_CLOSE_PARENTHESIS) {
break;
}
$newContent .= $finalTokens[$i]['content'];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($finalTokens[$i]['content']);
echo "\t\t=> token $i added to URL string and ignored: $content".PHP_EOL;
}
unset($finalTokens[$i]);
}
$stackPtr = $i;
// If the content inside the "url()" is in double quotes
// there will only be one token and so we don't have to do
// anything except change its type. If it is not empty,
// we need to do some token merging.
$finalTokens[($x + 1)]['type'] = 'T_URL';
$finalTokens[($x + 1)]['code'] = T_URL;
if ($newContent !== '') {
$finalTokens[($x + 1)]['content'] .= $newContent;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($finalTokens[($x + 1)]['content']);
echo "\t\t=> token content changed to: $content".PHP_EOL;
}
}
} else if ($finalTokens[$stackPtr]['content'][0] === '-'
&& $finalTokens[($stackPtr + 1)]['code'] === T_STRING
) {
if (isset($finalTokens[($stackPtr - 1)]) === true
&& $finalTokens[($stackPtr - 1)]['code'] === T_STRING
) {
$newContent = $finalTokens[($stackPtr - 1)]['content'].$finalTokens[$stackPtr]['content'].$finalTokens[($stackPtr + 1)]['content'];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* token is a string joiner; ignoring this and previous token".PHP_EOL;
$old = Util\Common::prepareForOutput($finalTokens[($stackPtr + 1)]['content']);
$new = Util\Common::prepareForOutput($newContent);
echo "\t\t=> token ".($stackPtr + 1)." content changed from \"$old\" to \"$new\"".PHP_EOL;
}
$finalTokens[($stackPtr + 1)]['content'] = $newContent;
unset($finalTokens[$stackPtr]);
unset($finalTokens[($stackPtr - 1)]);
} else {
$newContent = $finalTokens[$stackPtr]['content'].$finalTokens[($stackPtr + 1)]['content'];
$finalTokens[($stackPtr + 1)]['content'] = $newContent;
unset($finalTokens[$stackPtr]);
}
}//end if
break;
case T_ASPERAND:
$asperandStart = true;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* at-rule definition opened *".PHP_EOL;
}
break;
default:
// Nothing special to be done with this token.
break;
}//end switch
}//end for
// Reset the array keys to avoid gaps.
$finalTokens = array_values($finalTokens);
$numTokens = count($finalTokens);
// Blank out the content of the end tag.
$finalTokens[($numTokens - 1)]['content'] = '';
if ($eolAdded === true) {
// Strip off the extra EOL char we added for tokenizing.
$finalTokens[($numTokens - 2)]['content'] = substr(
$finalTokens[($numTokens - 2)]['content'],
0,
(strlen($this->eolChar) * -1)
);
if ($finalTokens[($numTokens - 2)]['content'] === '') {
unset($finalTokens[($numTokens - 2)]);
$finalTokens = array_values($finalTokens);
$numTokens = count($finalTokens);
}
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** END CSS TOKENIZING 2ND PASS ***".PHP_EOL;
}
return $finalTokens;
}//end tokenize()
/**
* Performs additional processing after main tokenizing.
*
* @return void
*/
public function processAdditional()
{
/*
We override this method because we don't want the PHP version to
run during CSS processing because it is wasted processing time.
*/
}//end processAdditional()
}//end class