Struct Context

pub struct Context { /* private fields */ }

An XPath context

Implementations

impl Context

pub fn new(doc: &Document) -> Result<Context, ()>

create the xpath context for a document

pub fn as_ptr(&self) -> xmlXPathContextPtr

Returns the raw libxml2 context pointer behind the struct

pub fn from_node(node: &Node) -> Result<Context, ()>

Instantiate a new Context for the Document of a given Node. Note: the Context is root-level for that document, use .set_context_node to limit scope to this node

pub fn register_namespace(&self, prefix: &str, href: &str) -> Result<(), ()>

Register a namespace prefix-href pair on the xpath context

pub fn evaluate(&self, xpath: &str) -> Result<Object, ()>

evaluate an xpath

pub fn node_evaluate(&self, xpath: &str, node: &Node) -> Result<Object, ()>

evaluate an xpath on a context Node

pub fn node_evaluate_readonly( &self, xpath: &str, node: RoNode, ) -> Result<Object, ()>

evaluate an xpath on a context RoNode

pub fn set_context_node(&mut self, node: &Node) -> Result<(), ()>

localize xpath context to a specific Node

pub fn findnodes( &mut self, xpath: &str, node_opt: Option<&Node>, ) -> Result<Vec<Node>, ()>

find nodes via xpath, at a specified node or the document root

pub fn findvalues( &mut self, xpath: &str, node_opt: Option<&Node>, ) -> Result<Vec<String>, ()>

find literal values via xpath, at a specified node or the document root

pub fn findvalue( &mut self, xpath: &str, node_opt: Option<&Node>, ) -> Result<String, ()>

find a literal value via xpath, at a specified node or the document root

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.