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<?php |
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/* |
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* This file is part of the Ariadne Component Library. |
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* |
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* (c) Muze <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace arc; |
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/** |
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* Any method statically called on this class |
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* will reroute the call to the XML writer instance at |
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* \arc\xml::$writer. Except for the methods: |
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* parse, css2XPath, name, value, attribute, comment, cdata and preamble |
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* If you need those call the Writer instance directly |
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*/ |
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class xml |
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{ |
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/** |
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* @var xml\Writer The writer instance to use by default |
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*/ |
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public static $writer = null; |
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public static function __callStatic( $name, $args ) |
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{ |
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if ( !isset(static::$writer) ) { |
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static::$writer = new xml\Writer(); |
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} |
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return call_user_func_array( [ static::$writer, $name ], $args ); |
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} |
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/** |
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* This parses an XML string and returns a Proxy |
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* @param string|Proxy $xml |
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* @return Proxy |
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* @throws \arc\UnknownError |
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*/ |
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public static function parse( $xml=null, $encoding = null ) |
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{ |
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$parser = new xml\Parser(); |
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return $parser->parse( $xml, $encoding ); |
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} |
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/** |
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* This method turns a single CSS 2 selector into an XPath query |
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* @param string $cssSelector |
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* @return string |
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*/ |
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public static function css2XPath( $cssSelector ) |
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{ |
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$tag = '(?:\w+\|)?\w+'; |
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/* based on work by Tijs Verkoyen - http://blog.verkoyen.eu/blog/p/detail/css-selector-to-xpath-query/ */ |
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$translateList = array( |
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// E F: Matches any F element that is a descendant of an E element |
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'/('.$tag.')\s+(?=(?:[^"]*"[^"]*")*[^"]*$)('.$tag.')/' |
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=> '\1//\2', |
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// E > F: Matches any F element that is a child of an element E |
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'/('.$tag.')\s*>\s*('.$tag.')/' |
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=> '\1/\2', |
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// E:first-child: Matches element E when E is the first child of its parent |
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'/('.$tag.'|(\w+\|)?\*):first-child/' |
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=> '*[1]/self::\1', |
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// Matches E:checked, E:disabled or E:selected (and just for scrutinizer: this is not code!) |
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'/('.$tag.'|(\w+\|)?\*):(checked|disabled|selected)/' |
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=> '\1 [ @\3 ]', |
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// E + F: Matches any F element immediately preceded by an element |
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'/('.$tag.')\s*\+\s*('.$tag.')/' |
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=> '\1/following-sibling::*[1]/self::\2', |
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// E ~ F: Matches any F element preceded by an element |
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'/('.$tag.')\s*\~\s*('.$tag.')/' |
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=> '\1/following-sibling::*/self::\2', |
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// E[foo]: Matches any E element with the "foo" attribute set (whatever the value) |
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'/('.$tag.')\[([\w\-]+)]/' |
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=> '\1 [ @\2 ]', |
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// E[foo="warning"]: Matches any E element whose "foo" attribute value is exactly equal to "warning" |
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'/('.$tag.')\[([\w\-]+)\=\"(.*)\"]/' |
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=> '\1[ contains( concat( " ", normalize-space(@\2), " " ), concat( " ", "\3", " " ) ) ]', |
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// .warning: HTML only. The same as *[class~="warning"] |
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'/(^|\s)\.([\w\-]+)+/' |
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=> '*[ contains( concat( " ", normalize-space(@class), " " ), concat( " ", "\2", " " ) ) ]', |
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// div.warning: HTML only. The same as DIV[class~="warning"] |
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'/('.$tag.'|(\w+\|)?\*)\.([\w\-]+)+/' |
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=> '\1[ contains( concat( " ", normalize-space(@class), " " ), concat( " ", "\3", " " ) ) ]', |
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// E#myid: Matches any E element with id-attribute equal to "myid" |
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'/('.$tag.')\#([\w\-]+)/' |
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=> "\\1[@id='\\2']", |
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// #myid: Matches any E element with id-attribute equal to "myid" |
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'/\#([\w\-]+)/' |
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=> "*[@id='\\1']", |
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// namespace| |
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'/(\w+)\|/' |
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=> "\\1:" |
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); |
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$cssSelectors = array_keys($translateList); |
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$xPathQueries = array_values($translateList); |
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do { |
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$continue = false; |
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$cssSelector = (string) preg_replace($cssSelectors, $xPathQueries, $cssSelector); |
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foreach ( $cssSelectors as $selector ) { |
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if ( preg_match($selector, $cssSelector) ) { |
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$continue = true; |
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break; |
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} |
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} |
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} while ( $continue ); |
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return '//'.$cssSelector; |
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} |
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/** |
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* Returns a guaranteed valid XML name. Removes illegal characters from the name. |
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* @param string $name |
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* @return string |
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*/ |
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public static function name( $name) |
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{ |
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return preg_replace( '/^[^:a-z_]*/isU', '', |
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preg_replace( '/[^-.0-9:a-z_]/isU', '', $name |
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) ); |
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} |
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/** |
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* Returns a guaranteed valid XML attribute value. Removes illegal characters. |
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* @param string|array|bool $value |
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* @return string |
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*/ |
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public static function value( $value) |
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{ |
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if (is_array( $value )) { |
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$content = array_reduce( $value, function( $result, $value) |
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{ |
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return $result . ' ' . static::value( $value ); |
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} ); |
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} else if (is_bool( $value )) { |
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$content = $value ? 'true' : 'false'; |
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} else { |
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$value = (string) $value; |
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if (preg_match( '/^\s*<!\[CDATA\[/', $value )) { |
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$content = $value; |
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} else { |
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$content = htmlspecialchars( (string) $value, ENT_QUOTES, 'UTF-8' ); |
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} |
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} |
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return $content; |
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} |
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/** |
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* Returns a guaranteed valid XML attribute. Removes illegal characters. |
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* @param string $name |
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* @param string|array|bool $value |
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* @return string |
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*/ |
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public static function attribute( $name, $value) |
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{ |
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return ' ' . static::name( $name ) . '="' . static::value( $value ) . '"'; |
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} |
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/** |
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* Returns a guaranteed valid XML comment. Removes illegal characters. |
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* @param string $content |
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* @return string |
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*/ |
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public static function comment( $content) |
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{ |
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return static::raw('<!-- ' . static::value( $content ) . ' -->'); |
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} |
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/** |
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* Returns a guaranteed valid XML CDATA string. Removes illegal characters. |
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* @param string $content |
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* @return string |
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*/ |
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public static function cdata( $content) |
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{ |
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return static::raw('<![CDATA[' . str_replace( ']]>', ']]>', $content ) . ']]>'); |
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} |
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/** |
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* Returns an XML preamble. |
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* @param string $version Defaults to '1.0' |
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* @param string $encoding Defaults to null |
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* @param string $standalone Defaults to null |
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* @return string |
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*/ |
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public static function preamble( $version = '1.0', $encoding = null, $standalone = null) |
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{ |
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if (isset($standalone)) { |
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if ($standalone === 'false') { |
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$standalone = 'no'; |
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} else if ($standalone !== 'no') { |
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$standalone = ( $standalone ? 'yes' : 'no' ); |
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} |
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$standalone = static::attribute( 'standalone', $standalone ); |
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} else { |
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$standalone = ''; |
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} |
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$preamble = '<?xml version="' . static::value($version) . '"'; |
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if (isset( $encoding )) { |
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$preamble .= ' " encoding="' . static::value($encoding) . '"'; |
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} |
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$preamble .= $standalone . ' ?>'; |
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return $preamble; |
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} |
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public static function raw( $contents='' ) { |
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return new xml\RawXML($contents); |
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} |
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} |
Ariadne-CMS /
arc-xml
