hexpat-0.12: wrapper for expat, the fast XML parser Source code Contents Index

Text.XML.Expat.NodeClass

Description

A typeclass to allow for functions that work with different node types such as the ones defined in Tree and Annotated.

Synopsis

class NodeClass n where isElement :: n tag text -> Bool isText :: n tag text -> Bool textContent :: Monoid text => n tag text -> text isNamed :: Eq tag => tag -> n tag text -> Bool getName :: GenericXMLString tag => n tag text -> tag getAttributes :: n tag text -> [(tag, text)] getChildren :: n tag text -> [n tag text] modifyName :: (tag -> tag) -> n tag text -> n tag text modifyAttributes :: ([(tag, text)] -> [(tag, text)]) -> n tag text -> n tag text modifyChildren :: ([n tag text] -> [n tag text]) -> n tag text -> n tag text mapAllTags :: (tag -> tag') -> n tag text -> n tag' text mapElement :: ((tag, [(tag, text)], [n tag text]) -> (tag', [(tag', text)], [n tag' text])) -> n tag text -> n tag' text getAttribute :: (NodeClass n, GenericXMLString tag) => n tag text -> tag -> Maybe text setAttribute :: (Eq tag, NodeClass n, GenericXMLString tag) => tag -> text -> n tag text -> n tag text deleteAttribute :: (Eq tag, NodeClass n, GenericXMLString tag) => tag -> n tag text -> n tag text alterAttribute :: (Eq tag, NodeClass n, GenericXMLString tag) => tag -> Maybe text -> n tag text -> n tag text

Documentation

class NodeClass n where Source

Methods isElement :: n tag text -> Bool Source Is the given node an element? isText :: n tag text -> Bool Source Is the given node text? textContent :: Monoid text => n tag text -> text Source Extract all text content from inside a tag into a single string, including any text contained in children. isNamed :: Eq tag => tag -> n tag text -> Bool Source Is the given node a tag with the given name? getName :: GenericXMLString tag => n tag text -> tag Source Get the name of this node if it's an element, return empty string otherwise. getAttributes :: n tag text -> [(tag, text)] Source Get the attributes of a node if it's an element, return empty list otherwise. getChildren :: n tag text -> [n tag text] Source Get children of a node if it's an element, return empty list otherwise. modifyName :: (tag -> tag) -> n tag text -> n tag text Source Modify name if it's an element, no-op otherwise. modifyAttributes :: ([(tag, text)] -> [(tag, text)]) -> n tag text -> n tag text Source Modify attributes if it's an element, no-op otherwise. modifyChildren :: ([n tag text] -> [n tag text]) -> n tag text -> n tag text Source Modify children (non-recursively) if it's an element, no-op otherwise. mapAllTags :: (tag -> tag') -> n tag text -> n tag' text Source Map all tags (both tag names and attribute names) recursively. mapElement :: ((tag, [(tag, text)], [n tag text]) -> (tag', [(tag', text)], [n tag' text])) -> n tag text -> n tag' text Source Map an element non-recursively, allowing the tag type to be changed. Instances NodeClass Node NodeClass (Node a)

getAttribute :: (NodeClass n, GenericXMLString tag) => n tag text -> tag -> Maybe text Source

Get the value of the attribute having the specified name.

setAttribute :: (Eq tag, NodeClass n, GenericXMLString tag) => tag -> text -> n tag text -> n tag text Source

Set the value of the attribute with the specified name to the value, overwriting the first existing attribute with that name if present.

deleteAttribute :: (Eq tag, NodeClass n, GenericXMLString tag) => tag -> n tag text -> n tag text Source

Delete the first attribute matching the specified name.

alterAttribute :: (Eq tag, NodeClass n, GenericXMLString tag) => tag -> Maybe text -> n tag text -> n tag text Source

setAttribute if Just, deleteAttribute if Nothing.

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