[binarycloud-cvs-commit] cvs: r2 /binarycloud/base/lib BCTagParser.php

[andi <bin...@li...>]

andi		Sun Sep 16 13:39:44 2001 EDT

  Added files:                 
    /r2/binarycloud/base/lib	BCTagParser.php 
  Log:
  Parser class that will provide parsing xhtml/xml files for bc:* tags. Very early experimetnal code
  
  

Index: r2/binarycloud/base/lib/BCTagParser.php
+++ r2/binarycloud/base/lib/BCTagParser.php
#!/usr/local/php4/bin/php -q
<?php
class BCTagParser {
    
	/** Pool of all registered bc:foo tags and processor methods */
	var $knownTags;

    function BCTagParser($_file) {
		$this->RegisterTag('BC:IMG', "ImageRequestBuilder::Process");
		$this->RegisterTag('BC:JS', "JSRequestBuilder::Process");
		$this->RegisterTag('BC:MODULE', "_ProcessModule");
		$this->_Parse($_file);
    }

	function RegisterTag($_tag, $_processor) {
		$this->knownTags[$_tag] = $_processor;
	}

	// method _StartElement(&$_parser, $_name, $_attrs) {{{
    /**
	 * Method function triggered when an XML start element appears
     * here we will parse tag's we recognize from the xml file
	 *
     * @param $_parser    ref        the XML parser
     * @param $_name      string     the tag found
     * @param $_attrs     array      the attributes this tag carried
	 * @access private
	 * @author Andreas Adrehold, <a.a...@th...>
     */

    function _StartElement(&$_parser, $_name, $_attrs) {
	  if (!isset($this->knownTags[$_name])) {
		print "Unknown Tag $_name\n";
		return;
	  }
	  print "Processing $_name using ".$this->knownTags[$_name]."\n";
	  var_dump($_attrs);

	  // call the processing function, return resulting php
	  // return $this->knownTags[$_name]($_attrs);
	}

	// }}}
	// method _EndElement(&$_parser, $_name) {{{
    
    function _EndElement(&$_parser, $_name) {
        // nothing - for now
    }

	// }}}
	// method _ProcessModule(&$_attrs) {{{

	function _ProcessModule(&$_attrs) {
		// wil call xml2php methods etc.
		// retuns resulting php
		var_dump($attrs);
	}

	// }}}
	// method _Parse($_file) {{{
    /**
     * private method for parsing the XML file. actually creates XML 
	 * parser and sets up element handlers
	 *
	 * @param $_file     string    the file to parse
     */

    function _Parse($_file) {
    
        printf("Parsing XML file: $_file...\n",$this);

        if (empty($_file)) {
            die("XML file to parse was not set");
		}

        $xml_parser = xml_parser_create();
        xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, true);
        xml_set_object($xml_parser, &$this);
        xml_set_element_handler($xml_parser, "_StartElement", "_EndElement");
        if (!($fp = fopen($_file, "r"))) {
            die("Could not open XML input");
        }
        
        while ($data = fread($fp, 4096)) {
            if (!xml_parse($xml_parser, $data, feof($fp))) {
               die(sprintf("XML error: %s at line %d of $_file\n",
						   xml_error_string(xml_get_error_code($xml_parser)),
						   xml_get_current_line_number($xml_parser)));
            }
        }
        xml_parser_free($xml_parser);

    }
	// }}}

}
// }}}
// exectute the parser for demonstration
$xml =& new BCTagParser("data.html.xml");
/*
 * Local Variables:
 * mode: php
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 */
?>