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<?php |
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namespace Bavix\AdvancedHtmlDom; |
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class CSS |
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{ |
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/** |
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* @param $str |
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* @param string $last_nav |
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* |
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* @return string |
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*/ |
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6 |
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public static function translate_part($str, $last_nav = '') |
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{ |
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$str = \preg_replace('/:contains\(([^()]*)\)/', '[text*=\\1]', $str); // quick and dirty contains fix |
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$retval = array(); |
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$re = '/(:(?:nth-last-child|nth-of-type|nth-last-of-type|first-child|last-child|first-of-type|last-of-type|only-child|only-of-type|nth-child|first|last|gt|lt|eq|root|nth|empty|not|has|contains|parent|link|visited|hover|active)(?:\((?>[^()]|(?R))*\))?|\[(?>[^\[\]]|(?R))*\]|[#.][\w-]+)/'; |
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$name = '*'; |
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foreach (\preg_split($re, $str, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY) as $token) { |
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switch (true) { |
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case 0 === \strpos($token, ':'): |
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// case preg_match('/^:/', $token): |
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$retval[] = self::do_pseudo($token, $name); |
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break; |
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case 0 === \strpos($token, '['): |
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// case preg_match('/^\[/', $token): |
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$retval[] = self::do_braces($token); |
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break; |
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case 0 === \strpos($token, '#'): |
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// case preg_match('/^#/', $token): |
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$retval[] = "[" . self::do_id($token) . "]"; |
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break; |
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case 0 === \strpos($token, '.'): |
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// case preg_match('/^\./', $token): |
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$retval[] = "[" . self::do_class($token) . "]"; |
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break; |
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default: |
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$name = $token; |
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} |
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} |
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if (\in_array($name, array('text', 'comment'))) { |
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$name .= '()'; |
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} |
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return ($last_nav === '+' ? "*[1]/self::" : '') . $name . \implode('', $retval); |
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//return $name . implode('', $retval); |
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} |
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/** |
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* @param $str |
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* @param $name |
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* |
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* @return string |
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*/ |
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public static function do_pseudo($str, $name) |
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{ |
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if (!\preg_match('/^:([\w-]+)(?:\((.*)\))?$/', $str, $m)) { |
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die('no attribute match!'); |
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} |
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//var_dump($m); exit; |
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@list($_, $pseudo, $value) = $m; |
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switch (true) { |
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#case preg_match('/^\[.*\]$/', $value): $inner = preg_replace('/^\[(.*)\]$/', '\1', self::do_braces($value)); break; |
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default: |
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$inner = self::translate($value); |
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break; |
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} |
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// self::translate_part($value) |
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switch ($pseudo) { |
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case 'last': |
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return '[position() = last()]'; |
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case 'first': |
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return '[position() = 1]'; |
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case 'parent': |
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return '[node()]'; |
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case 'contains': |
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return '[contains(., ' . $value . ')]'; |
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case 'nth': |
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return '[position() = ' . $value . ']'; |
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case 'gt': |
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return '[position() > ' . $value . ']'; |
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case 'lt': |
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return '[position() < ' . $value . ']'; |
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case 'eq': |
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return '[position() = ' . $value . ']'; |
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case 'root': |
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return '[not(parent::*)]'; |
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# case 'nth-child': return '[count(preceding-sibling::*) = ' . ($value - 1) . ']'; |
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case 'nth-child': |
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return '[' . self::nth_child($value) . ']'; |
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# case 'nth-last-child': return '[count(following-sibling::*) = ' . ($value - 1) . ']'; |
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case 'nth-last-child': |
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return '[' . self::nth_child($value, true) . ']'; |
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# case 'nth-of-type': return '[position() = ' . $value . ']'; |
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case 'nth-of-type': |
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return '[' . self::nth($value) . ']'; |
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# case 'nth-last-of-type': return $value ? '[position() = last() - ' . ($value - 1) . ']' : '[position() = last()'; |
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case 'nth-last-of-type': |
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return '[' . self::nth($value, true) . ']'; |
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case 'first-child': |
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return '[count(preceding-sibling::*) = 0]'; |
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case 'first-of-type': |
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return '[position() = 1]'; |
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case 'last-child': |
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return '[count(following-sibling::*) = 0]'; |
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case 'last-of-type': |
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return '[position() = last()]'; |
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case 'only-child': |
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return '[count(preceding-sibling::*) = 0 and count(following-sibling::*) = 0]'; |
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case 'only-of-type': |
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return '[last() = 1]'; |
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case 'empty': |
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return '[not(node())]'; |
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case 'not': |
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return '[not(' . self::not($value) . ')]'; |
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# case 'has': return '[' . $inner . ']'; |
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case 'has': |
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return '[' . $inner . ']'; |
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// case 'link': return '[link(.)]'; |
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case 'link': |
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case 'visited': |
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case 'hover': |
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case 'active': |
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return '[' . $pseudo . '(.)]'; |
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default: |
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die('unknown pseudo element: ' . $str); |
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} |
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} |
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/** |
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* @param $str |
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* |
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* @return string |
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*/ |
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public static function translate($str) |
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{ |
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$retval = array(); |
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$re = '/(\((?>[^()]|(?R))*\)|\[(?>[^\[\]]|(?R))*\]|\s*[+~>]\s*| \s*)/'; |
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$item = ''; |
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$last_nav = null; |
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//echo "\n!" . $str . "!\n"; |
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//var_dump(preg_split($re, $str, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY)); |
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foreach (\preg_split($re, $str, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY) as $token) { |
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$token = \trim($token); |
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//echo $token . "-\n"; |
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switch ($token) { |
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case '>': |
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case '~': |
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case '+': |
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case '': |
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if (!empty($item)) { |
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$retval[] = self::translate_part(\trim($item), $last_nav); |
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} |
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$item = ''; |
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$last_nav = $token; |
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if (!isset($first_nav)) { |
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$first_nav = $token; |
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} else { |
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$retval[] = self::translate_nav(\trim($token)); |
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} |
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break; |
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default: |
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if (!isset($first_nav)) { |
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$first_nav = ''; |
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} |
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$item .= $token; |
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} |
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} |
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// var_dump($first_nav, $retval); exit; |
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$retval[] = self::translate_part(\trim($item), $last_nav); |
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if (!isset($first_nav)) { |
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$first_nav = ''; |
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} |
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return '.' . self::translate_nav($first_nav) . \implode('', $retval); |
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} |
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/** |
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* @param $str |
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* |
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* @return string |
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*/ |
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public static function translate_nav($str) |
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{ |
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switch ($str) { |
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case '+': |
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return '/following-sibling::'; |
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case '~': |
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return '/following-sibling::'; |
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case '>': |
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return '/'; |
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case '': |
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return '//'; |
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} |
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} |
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/** |
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* @param $str |
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* @param bool $last |
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* |
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* @return string |
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*/ |
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private static function nth_child($str, $last = false) |
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{ |
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list($a, $b) = self::parse_nth($str); |
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$tokens = []; |
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if ($last) { |
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if ($a === null) { |
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return "count(following-sibling::*) = " . ($b - 1); |
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} |
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if ($b > 0 && $a >= 0) { |
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$tokens[] = "((last()-position()+1) >= " . $b . ")"; |
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} |
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if ($b > 0 && $a < 0) { |
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$tokens[] = "((last()-position()+1) <= " . $b . ")"; |
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} |
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if ($a != 0 && $b != 0) { |
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$tokens[] = "((((last()-position()+1)-" . $b . ") mod " . abs($a) . ") = 0)"; |
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} |
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if ($a != 0 && $b == 0) { |
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$tokens[] = "((last()-position()+1) mod " . abs($a) . ") = 0"; |
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} |
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} else { |
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if ($a === null) { |
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return "count(preceding-sibling::*) = " . ($b - 1); |
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} |
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if ($b > 0 && $a >= 0) { |
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$tokens[] = "(position() >= " . $b . ")"; |
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} |
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if ($b > 0 && $a < 0) { |
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$tokens[] = "(position() <= " . $b . ")"; |
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} |
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if ($a != 0 && $b != 0) { |
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$tokens[] = "(((position()-" . $b . ") mod " . abs($a) . ") = 0)"; |
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} |
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if ($a != 0 && $b == 0) { |
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$tokens[] = "(position() mod " . abs($a) . ") = 0"; |
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} |
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} |
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247
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return \implode(' and ', $tokens); |
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} |
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250
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// This stuff is wrong, I need to look at this some more. |
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252
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/** |
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253
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* @param $str |
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254
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* |
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255
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* @return array |
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256
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*/ |
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257
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private static function parse_nth($str) |
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{ |
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switch (true) { |
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260
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261
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case \preg_match('/^(-?\d+)(?:n\+(\d+))$/', $str, $m): |
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return array((int)$m[1], (int)$m[2]); |
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263
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264
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case \preg_match('/^n\+(\d+)$/', $str, $m): |
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return array(1, (int)$m[1]); |
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267
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case \preg_match('/^-n\+(\d+)$/', $str, $m): |
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return array(-1, (int)$m[1]); |
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270
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case \preg_match('/^(\d+)n$/', $str, $m): |
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return array((int)$m[1], 0); |
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273
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case \preg_match('/^even$/', $str, $m): |
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return self::parse_nth('2n+0'); |
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276
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case \preg_match('/^odd$/', $str, $m): |
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return self::parse_nth('2n+1'); |
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279
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case \preg_match('/^(-?\d+)$/', $str, $m): |
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280
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return array(null, (int)$m[1]); |
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281
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282
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default: |
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die('no match: ' . $str); |
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284
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} |
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285
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} |
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286
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287
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/** |
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288
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* @param $str |
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289
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* @param bool $last |
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290
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* |
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291
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* @return string |
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292
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*/ |
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293
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private static function nth($str, $last = false) |
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294
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{ |
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295
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list($a, $b) = self::parse_nth($str); |
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296
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//echo $a . ":" . $b . "\n"; |
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297
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$tokens = []; |
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298
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299
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if ($last) { |
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300
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if ($a === null) { |
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301
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return 'position() = last() - ' . ($b - 1); |
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302
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} |
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303
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304
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if ($b > 0 && $a >= 0) { |
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305
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|
$tokens[] = '((last()-position()+1) >= ' . $b . ')'; |
|
306
|
|
|
} |
|
307
|
|
|
|
|
308
|
|
|
if ($b > 0 && $a < 0) { |
|
309
|
|
|
$tokens[] = '((last()-position()+1) <= ' . $b . ')'; |
|
310
|
|
|
} |
|
311
|
|
|
|
|
312
|
|
|
if ($a != 0 && $b != 0) { |
|
313
|
|
|
$tokens[] = '((((last()-position()+1)-' . $b . ') mod ' . abs($a) . ') = 0)'; |
|
314
|
|
|
} |
|
315
|
|
|
|
|
316
|
|
|
if ($a != 0 && $b == 0) { |
|
317
|
|
|
$tokens[] = '((last()-position()+1) mod ' . abs($a) . ') = 0'; |
|
318
|
|
|
} |
|
319
|
|
|
|
|
320
|
|
|
} else { |
|
321
|
|
|
|
|
322
|
|
|
if ($a === null) { |
|
323
|
|
|
return 'position() = ' . $b; |
|
324
|
|
|
} |
|
325
|
|
|
|
|
326
|
|
|
if ($b > 0 && $a >= 0) { |
|
327
|
|
|
$tokens[] = '(position() >= ' . $b . ')'; |
|
328
|
|
|
} |
|
329
|
|
|
|
|
330
|
|
|
if ($b > 0 && $a < 0) { |
|
331
|
|
|
$tokens[] = '(position() <= ' . $b . ')'; |
|
332
|
|
|
} |
|
333
|
|
|
|
|
334
|
|
|
if ($a != 0 && $b != 0) { |
|
335
|
|
|
$tokens[] = '(((position()-' . $b . ') mod ' . abs($a) . ') = 0)'; |
|
336
|
|
|
} |
|
337
|
|
|
|
|
338
|
|
|
if ($a != 0 && $b == 0) { |
|
339
|
|
|
$tokens[] = '(position() mod ' . abs($a) . ') = 0'; |
|
340
|
|
|
} |
|
341
|
|
|
|
|
342
|
|
|
} |
|
343
|
|
|
|
|
344
|
|
|
return \implode(' and ', $tokens); |
|
345
|
|
|
} |
|
346
|
|
|
|
|
347
|
|
|
/** |
|
348
|
|
|
* @param $str |
|
349
|
|
|
* |
|
350
|
|
|
* @return string |
|
351
|
|
|
*/ |
|
352
|
|
|
private static function not($str) |
|
353
|
|
|
{ |
|
354
|
|
|
switch (true) { |
|
|
|
|
|
|
355
|
|
|
case \preg_match('/^\.(\w+)$/', $str, $m): |
|
356
|
|
|
return self::do_class($str); |
|
357
|
|
|
case \preg_match('/^\#(\w+)$/', $str, $m): |
|
358
|
|
|
return self::do_id($str); |
|
359
|
|
|
case \preg_match('/^(\w+)$/', $str, $m): |
|
360
|
|
|
return "self::" . $str; |
|
361
|
|
|
case \preg_match('/^\[(.*)\]$/', $str, $m): |
|
362
|
|
|
return substr(self::do_braces($str), 1, -1); |
|
363
|
|
|
default: |
|
364
|
|
|
return self::translate($str); |
|
365
|
|
|
} |
|
366
|
|
|
} |
|
367
|
|
|
|
|
368
|
|
|
/** |
|
369
|
|
|
* @param $str |
|
370
|
|
|
* |
|
371
|
|
|
* @return string |
|
372
|
|
|
*/ |
|
373
|
1 |
|
public static function do_class($str) |
|
374
|
|
|
{ |
|
375
|
1 |
|
if (!\preg_match('/^\.(.*)/', $str, $m)) { |
|
376
|
|
|
die('no attribute match!'); |
|
|
|
|
|
|
377
|
|
|
} |
|
378
|
|
|
|
|
379
|
1 |
|
return "contains(concat(' ', normalize-space(@class), ' '), ' " . $m[1] . " ')"; |
|
380
|
|
|
} |
|
381
|
|
|
|
|
382
|
|
|
/** |
|
383
|
|
|
* @param $str |
|
384
|
|
|
* |
|
385
|
|
|
* @return string |
|
386
|
|
|
*/ |
|
387
|
1 |
|
public static function do_id($str) |
|
388
|
|
|
{ |
|
389
|
1 |
|
if (!\preg_match('/^#(.*)/', $str, $m)) { |
|
390
|
|
|
die('no attribute match!'); |
|
|
|
|
|
|
391
|
|
|
} |
|
392
|
|
|
|
|
393
|
1 |
|
return "@id = '" . $m[1] . '\''; |
|
394
|
|
|
} |
|
395
|
|
|
|
|
396
|
|
|
/** |
|
397
|
|
|
* @param $str |
|
398
|
|
|
* |
|
399
|
|
|
* @return string |
|
400
|
|
|
*/ |
|
401
|
2 |
|
public static function do_braces($str) |
|
402
|
|
|
{ |
|
403
|
2 |
|
$re = '/("(?>[^"]|(?R))*\)"|\'(?>[^\']|(?R))*\'|[~^$*|]?=)\s*/'; |
|
404
|
|
|
|
|
405
|
2 |
|
$tokens = \preg_split($re, \substr($str, 1, \strlen($str) - 2), 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); |
|
406
|
|
|
|
|
407
|
2 |
|
$attr = \trim(\array_shift($tokens)); |
|
408
|
|
|
|
|
409
|
2 |
|
if (!$op = @\trim(\array_shift($tokens))) { |
|
410
|
|
|
switch (true) { |
|
|
|
|
|
|
411
|
1 |
|
case \preg_match('/^\d+$/', $attr): |
|
412
|
|
|
return "[count(preceding-sibling::*) = " . ($attr - 1) . "]"; // [2] -> [count(preceding-sibling::*) = 1] |
|
413
|
|
|
default: |
|
414
|
1 |
|
return "[@" . $attr . "]"; // [foo] => [@foo] |
|
415
|
|
|
} |
|
416
|
|
|
} |
|
417
|
|
|
switch (true) { |
|
|
|
|
|
|
418
|
1 |
|
case \preg_match('/^(text|comment)$/', $attr, $m): |
|
419
|
1 |
|
$attr = $m[1] . "()"; |
|
420
|
1 |
|
break; |
|
421
|
|
|
case !\preg_match('/[@(]/', $attr): |
|
422
|
|
|
$attr = '@' . $attr; |
|
423
|
|
|
break; |
|
424
|
|
|
} |
|
425
|
|
|
|
|
426
|
1 |
|
$value = @\trim(\array_shift($tokens)); |
|
427
|
1 |
|
if (!\preg_match('/^["\'].*["\']$/', $value)) { |
|
428
|
|
|
$value = "'" . $value . "'"; |
|
429
|
|
|
} |
|
430
|
|
|
|
|
431
|
|
|
switch ($op) { |
|
432
|
1 |
|
case '*=': |
|
433
|
1 |
|
return "[contains(" . $attr . ", " . $value . ")]"; |
|
434
|
|
|
case '^=': |
|
435
|
|
|
return "[starts-with(" . $attr . ", " . $value . ")]"; |
|
436
|
|
|
case '~=': |
|
437
|
|
|
return "[contains(concat(\" \", " . $attr . ", \" \"),concat(\" \", " . $value . ", \" \"))]"; |
|
438
|
|
|
case '$=': |
|
439
|
|
|
return "[substring(" . $attr . ", string-length(" . $attr . ") - string-length(" . $value . ") + 1, string-length(" . $value . ")) = " . $value . "]"; |
|
440
|
|
|
case '|=': |
|
441
|
|
|
return "[" . $attr . " = " . $value . " or starts-with(" . $attr . ", concat(" . $value . ", '-'))]"; |
|
442
|
|
|
case '=': |
|
443
|
|
|
return "[" . $attr . " = " . $value . "]"; |
|
444
|
|
|
default: |
|
445
|
|
|
die('unknown op: ' . $op); |
|
|
|
|
|
|
446
|
|
|
} |
|
447
|
|
|
} |
|
448
|
|
|
|
|
449
|
|
|
/** |
|
450
|
|
|
* @param $str |
|
451
|
|
|
* |
|
452
|
|
|
* @return mixed|string |
|
453
|
|
|
*/ |
|
454
|
6 |
|
public static function xpath_for($str) |
|
455
|
|
|
{ |
|
456
|
6 |
|
if (self::is_xpath($str)) { |
|
457
|
1 |
|
return $str; |
|
458
|
|
|
} |
|
459
|
6 |
|
$str = \preg_replace('/\b(text|comment)\(\)/', '\1', $str); |
|
460
|
6 |
|
$retval = array(); |
|
461
|
6 |
|
foreach (self::get_expressions($str) as $expr) { |
|
462
|
6 |
|
$retval[] = self::translate($expr); |
|
463
|
|
|
} |
|
464
|
|
|
|
|
465
|
6 |
|
return \implode('|', $retval); |
|
466
|
|
|
} |
|
467
|
|
|
|
|
468
|
|
|
/** |
|
469
|
|
|
* @param $str |
|
470
|
|
|
* |
|
471
|
|
|
* @return int |
|
472
|
|
|
*/ |
|
473
|
6 |
|
private static function is_xpath($str) |
|
474
|
|
|
{ |
|
475
|
6 |
|
return \preg_match('/^(?:string)?\(?\.?\//', $str); |
|
476
|
|
|
} |
|
477
|
|
|
|
|
478
|
|
|
/** |
|
479
|
|
|
* @param $str |
|
480
|
|
|
* |
|
481
|
|
|
* @return array |
|
482
|
|
|
*/ |
|
483
|
6 |
|
private static function get_expressions($str) |
|
484
|
|
|
{ |
|
485
|
6 |
|
$retval = array(); |
|
486
|
6 |
|
$re = '/(\((?>[^()]|(?R))*\)|\[(?>[^\[\]]|(?R))*\]|,)/'; |
|
487
|
6 |
|
$item = ''; |
|
488
|
6 |
|
foreach (\preg_split($re, $str, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY) as $token) { |
|
489
|
6 |
|
if (',' === $token) { |
|
490
|
|
|
$retval[] = \trim($item); |
|
491
|
|
|
$item = ''; |
|
492
|
|
|
} else { |
|
493
|
6 |
|
$item .= $token; |
|
494
|
|
|
} |
|
495
|
|
|
} |
|
496
|
6 |
|
$retval[] = \trim($item); |
|
497
|
|
|
|
|
498
|
6 |
|
return $retval; |
|
499
|
|
|
} |
|
500
|
|
|
} |
|
501
|
|
|
|
bavix /
advanced-html-dom
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.