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<?php |
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namespace ArjanSchouten\HtmlMinifier\Minifiers\Html; |
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use ArjanSchouten\HtmlMinifier\Constants; |
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use ArjanSchouten\HtmlMinifier\Minifiers\MinifierInterface; |
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use ArjanSchouten\HtmlMinifier\MinifyContext; |
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use ArjanSchouten\HtmlMinifier\Options; |
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use Illuminate\Support\Str; |
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class AttributeQuoteMinifier implements MinifierInterface |
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{ |
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/** |
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* Chars which are prohibited from an unquoted attribute. |
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* |
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* @var array |
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*/ |
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protected $prohibitedChars = [ |
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'\'', |
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'"', |
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"\n", |
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'=', |
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'&', |
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'`', |
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'>', |
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'<', |
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' ', |
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]; |
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/** |
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* Execute the minification rule. |
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* |
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* @param \ArjanSchouten\HtmlMinifier\MinifyContext $context |
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* |
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* @return \ArjanSchouten\HtmlMinifier\MinifyContext |
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*/ |
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public function process(MinifyContext $context) |
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{ |
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return $context->setContents(preg_replace_callback( |
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'/ |
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= # start matching by a equal sign |
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\s* # its valid to use whitespaces after the equals sign |
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(["\'])? # match a single or double quote and make it a capturing group for backreferencing |
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( |
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(?:(?=\1)|[^\\\\])* # normal part of "unrolling the loop". Match no quote nor escaped char |
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(?:\\\\\1 # match the escaped quote |
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(?:(?=\1)|[^\\\\])* # normal part again |
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)* # special part of "unrolling the loop" |
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) # use a the "unrolling the loop" technique to be able to skip escaped quotes like ="\"" |
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\1? # match the same quote symbol as matched before |
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/x', function ($match) { |
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return $this->minifyAttribute($match); |
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}, $context->getContents())); |
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} |
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/** |
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* Minify the attribute quotes if allowed. |
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* |
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* @param array $match |
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* |
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* @return string |
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*/ |
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protected function minifyAttribute($match) |
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{ |
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if (Str::contains($match[2], $this->prohibitedChars)) { |
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return $match[0]; |
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} elseif (preg_match('/'.Constants::PLACEHOLDER_PATTERN.'/is', $match[2])) { |
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return $match[0]; |
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} |
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return '='.$match[2]; |
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} |
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/** |
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* Indicates if minification rules depends on command options. |
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* |
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* @return string |
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*/ |
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public function provides() |
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{ |
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return Options::ATTRIBUTE_QUOTES; |
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} |
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} |
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ArjanSchouten /
HtmlMinifier
