struct XML::Node

Defined in:

xml/node.cr
xml/node/type.cr

Constant Summary

LOOKS_LIKE_XPATH = /^(\.\/|\/|\.\.|\.$)/

Constructors

Instance Method Summary

Instance methods inherited from struct Struct

==(other) : Bool ==, hash(hasher) hash, inspect(io : IO) : Nil inspect, pretty_print(pp) : Nil pretty_print, to_s(io : IO) : Nil to_s

Instance methods inherited from struct Value

==(other : JSON::Any)
==(other : YAML::Any)
==(other)
==
, dup dup

Instance methods inherited from class Object

! : Bool !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other)
===
, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash
hash(hasher)
hash
, inspect(io : IO) : Nil
inspect : String
inspect
, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO)
to_json
to_json
, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ")
to_pretty_json
, to_s : String
to_s(io : IO) : Nil
to_s
, to_yaml(io : IO)
to_yaml
to_yaml
, try(&) try, unsafe_as(type : T.class) forall T unsafe_as

Constructor methods inherited from class Object

from_json(string_or_io, root : String) : self
from_json(string_or_io) : self
from_json
, from_yaml(string_or_io : String | IO) : self from_yaml

Constructor Detail

def self.new(node : Pointer(LibXML::Attr)) #

Creates a new node.


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def self.new(node : Pointer(LibXML::Doc)) #

Creates a new node.


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def self.new(node : Pointer(LibXML::Node)) #

Creates a new node.


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Instance Method Detail

def ==(other : Node) #

Compares with other.


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def [](attribute : String) : String #

Gets the attribute content for the attribute given by name. Raises KeyError if attribute is not found.


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def []=(name : String, value) #

Sets attribute of this node to value. Raises XML::Error if this node does not support attributes.


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def []?(attribute : String) : String? #

Gets the attribute content for the attribute given by name. Returns nil if attribute is not found.


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def attribute? #

Returns true if this is an attribute node.


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def attributes #

Returns attributes of this node as an XML::Attributes.


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def cdata? #

Returns true if this is a CDATA section node.


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def children #

Gets the list of children for this node as a XML::NodeSet.


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def comment? #

Returns true if this is a comment node.


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def content : String #

Returns the content for this Node. An empty string is returned if the node has no content.


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def content=(content) #

Sets the Node's content to a Text node containing string. The string gets XML escaped, not interpreted as markup.


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def delete(name : String) #

Deletes attribute given by name. Returns attributes value, or nil if attribute not found.


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def document #

Gets the document for this Node as a XML::Node.


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def document? #

Returns true if this is a Document or HTML Document node.


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def element? #

Returns true if this is an Element node.


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def encoding #

Returns the encoding of this node's document.


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def errors #

Returns the list of XML::Error found when parsing this document. Returns nil if no errors were found.


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def first_element_child #

Returns the first child node of this node that is an element. Returns nil if not found.


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def fragment? #

Returns true if this is a DocumentFragment.


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def hash(hasher) #

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def inner_text #

Returns the content for this Node.


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def inspect(io : IO) : Nil #

Returns detailed information for this node including node type, name, attributes and children.


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def name #

Returns the name for this Node.


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def name=(name) #

Sets the name for this Node.


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def namespace #

Returns the namespace for this node or nil if not found.


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def namespace_scopes #

Returns namespaces in scope for self – those defined on self element directly or any ancestor node – as an Array of XML::Namespace objects.

Default namespaces ("xmlns=" style) for self are included in this array; Default namespaces for ancestors, however, are not.

See also #namespaces


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def namespaces #

Returns a Hash(String, String?) of prefix => href for all namespaces on this node and its ancestors.

This method returns the same namespaces as #namespace_scopes.

Returns namespaces in scope for self – those defined on self element directly or any ancestor node – as a Hash of attribute-name/value pairs.

NOTE Note that the keys in this hash XML attributes that would be used to define this namespace, such as "xmlns:prefix", not just the prefix.


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def next #

Returns the next sibling node or nil if not found.


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def next_element #

Returns the next element node sibling or nil if not found.


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def next_sibling #

Returns the next sibling node or nil if not found.


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def object_id #

Returns the address of underlying LibXML::Node* in memory.


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def parent #

Returns the parent node or nil if not found.


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def previous #

Returns the previous sibling node or nil if not found.


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def previous_element #

Returns the previous sibling node that is an element or nil if not found.


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def previous_sibling #

Returns the previous sibling node or nil if not found. Same with #previous.


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def processing_instruction? #

Returns true if this is a Processing Instruction node.


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def root #

Returns the root node for this document or nil.


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def text #

Same as #content.


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def text=(text) #

Same as #content=.


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def text? #

Returns true if this is a Text node.


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def to_s(io : IO) : Nil #

Serialize this Node as XML to io using default options.

See #to_xml.


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def to_unsafe : Pointer(LibXML::Node) #

Returns underlying LibXML::Node* instance.


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def to_xml(indent : Int = 2, indent_text = " ", options : SaveOptions = SaveOptions.xml_default) #

Serialize this Node as XML and return a String using default options.

See XML::SaveOptions.xml_default for default options.


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def to_xml(io : IO, indent = 2, indent_text = " ", options : SaveOptions = SaveOptions.xml_default) #

Serialize this Node as XML to io using default options.

See XML::SaveOptions.xml_default for default options.


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def type #

Returns the type for this Node as XML::Node::Type.


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def unlink #

Removes the node from the XML document.


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def version #

Returns the version of this node's document.


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def xml? #

Returns true if this is an xml Document node.


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def xpath(path, namespaces = nil, variables = nil) #

Searches this node for XPath path. Returns result with appropriate type (Bool | Float64 | String | XML::NodeSet).

Raises XML::Error on evaluation error.


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def xpath_bool(path, namespaces = nil, variables = nil) #

Searches this node for XPath path and restricts the return type to Bool.

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_bool("count(//person) > 0") # => true

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def xpath_float(path, namespaces = nil, variables = nil) #

Searches this node for XPath path and restricts the return type to Float64.

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_float("count(//person)") # => 1.0

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def xpath_node(path, namespaces = nil, variables = nil) #

Searches this node for XPath path for nodes and returns the first one. or nil if not found

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_node("//person")  # => #<XML::Node:0x2013e80 name="person">
doc.xpath_node("//invalid") # => nil

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def xpath_nodes(path, namespaces = nil, variables = nil) #

Searches this node for XPath path and restricts the return type to NodeSet.

require "xml"

doc = XML.parse("<person></person>")

nodes = doc.xpath_nodes("//person")
nodes.class       # => XML::NodeSet
nodes.map(&.name) # => ["person"]

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def xpath_string(path, namespaces = nil, variables = nil) #

Searches this node for XPath path and restricts the return type to String.

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_string("string(/persons/person[1])")

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