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