NAME¶
XML::LibXML::Text - XML::LibXML Class for Text Nodes
SYNOPSIS¶
use XML::LibXML;
# Only methods specific to Text nodes are listed here,
# see 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 );
DESCRIPTION¶
Unlike 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.
METHODS¶
The 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/
<
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
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 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.
AUTHORS¶
Matt Sergeant, Christian Glahn, Petr Pajas
VERSION¶
2.0001
COPYRIGHT¶
2001-2007, AxKit.com Ltd.
2002-2006, Christian Glahn.
2006-2009, Petr Pajas.