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NAME

XML::LibXML::Text - XML::LibXML Class for Text Nodes
 

SYNOPSIS

  $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 );

DESCRIPTION

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 TRUE deleteDataString 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 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 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.

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