XML::LibXML::Text - Online Linux Manual PageSection : 3pm
Updated : 2020-11-08
Source : perl v5.32.0
Note : User Contributed Perl Documentation
NAMEXML::LibXML::Text − XML::LibXML Class for Text Nodes
SYNOPSIS​ use XML::LibXML; ​ # Only methods specific to Text nodes are listed here, ​ # see the XML::LibXML::Node manpage for other methods ​ ​ $text = XML::LibXML::Text−>new( $content ); ​ $nodedata = $text−>data; ​ $text−>setData( $text_content ); ​ $text−>substringData($offset, $length); ​ $text−>appendData( $somedata ); ​ $text−>insertData($offset, $string); ​ $text−>deleteData($offset, $length); ​ $text−>deleteDataString($remstring, $all); ​ $text−>replaceData($offset, $length, $string); ​ $text−>replaceDataString($old, $new, $flag); ​ $text−>replaceDataRegEx( $search_cond, $replace_cond, $reflags );
DESCRIPTIONUnlike the DOM specification, XML::LibXML implements the text node as the base class of all character data node. Therefore there exists no CharacterData class. This allows one to apply methods of text nodes also to Comments and CDATA-sections.
METHODSThe class inherits from XML::LibXML::Node. The documentation for Inherited methods is not listed here. Many functions listed here are extensively documented in the DOM Level 3 specification (<http://www.w3.org/TR/DOM−Level−3−Core/>). Please refer to the specification for extensive documentation. new ​ $text = XML::LibXML::Text−>new( $content ); The constructor of the class. It creates an unbound text node. data ​ $nodedata = $text−>data; Although there exists the nodeValue attribute in the Node class, the DOM specification defines data as a separate attribute. XML::LibXML implements these two attributes not as different attributes, but as aliases, such as libxml2 does. Therefore ​ $text−>data; and ​ $text−>nodeValue; will have the same result and are not different entities. setData($string) ​ $text−>setData( $text_content ); This function sets or replaces text content to a node. The node has to be of the type ‟text”, ‟cdata” or ‟comment”. substringData($offset,$length) ​ $text−>substringData($offset, $length); Extracts a range of data from the node. (DOM Spec) This function takes the two parameters $offset and $length and returns the sub-string, if available. If the node contains no data or $offset refers to an non-existing string index, this function will return undef. If $length is out of range substringData will return the data starting at $offset instead of causing an error. appendData($string) ​ $text−>appendData( $somedata ); Appends a string to the end of the existing data. If the current text node contains no data, this function has the same effect as setData. insertData($offset,$string) ​ $text−>insertData($offset, $string); Inserts the parameter $string at the given $offset of the existing data of the node. This operation will not remove existing data, but change the order of the existing data. The $offset has to be a positive value. If $offset is out of range, insertData will have the same behaviour as appendData. deleteData($offset, $length) ​ $text−>deleteData($offset, $length); This method removes a chunk from the existing node data at the given offset. The $length parameter tells, how many characters should be removed from the string. deleteDataString($string, [$all]) ​ $text−>deleteDataString($remstring, $all); This method removes a chunk from the existing node data. Since the DOM spec is quite unhandy if you already know which string to remove from a text node, this method allows more perlish code :) The functions takes two parameters: $string and optional the $all flag. If $all is not set, undef or 0, deleteDataString will remove only the first occurrence of $string. If $all is TRUEdeleteDataString will remove all occurrences of $string from the node data. replaceData($offset, $length, $string) ​ $text−>replaceData($offset, $length, $string); The DOM style version to replace node data. replaceDataString($oldstring, $newstring, [$all]) ​ $text−>replaceDataString($old, $new, $flag); The more programmer friendly version of replaceData() :) Instead of giving offsets and length one can specify the exact string ($oldstring) to be replaced. Additionally the $all flag allows one to replace all occurrences of $oldstring. replaceDataRegEx( $search_cond, $replace_cond, $reflags ) ​ $text−>replaceDataRegEx( $search_cond, $replace_cond, $reflags ); This method replaces the node's data by a simple regular expression. Optional, this function allows one to pass some flags that will be added as flag to the replace statement. ​NOTE: This is a shortcut for ​ my $datastr = $node−>getData(); ​ $datastr =~ s/somecond/replacement/g; # 'g' is just an example for any flag ​ $node−>setData( $datastr ); This function can make things easier to read for simple replacements. For more complex variants it is recommended to use the code snippet above.
AUTHORSMatt Sergeant, Christian Glahn, Petr Pajas
VERSION2.0134
COPYRIGHT2001−2007, AxKit.com Ltd. 2002−2006, Christian Glahn. 2006−2009, Petr Pajas.
LICENSEThis program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. 0
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