Text.XML.HXT.CSS

Turn a CSS selector into an HXT arrow.

Documentation

css :: (ArrowXml a, Css s) => s -> a XmlTree XmlTree

Select elements from an HTML document with a CSS selector.

cssShallow :: (ArrowXml a, Css s) => s -> a XmlTree XmlTree

Like css, except that the selector is anchored at the top. For example, cssShallow "div" will only select div elements that are in the input of the arrow, it will not recursively search for divs contained deeper in the document tree. The latter can be selected by cssShallow "* div" but is recommended to use css for that. In other words, cssShallow "div" corresponds to the "/div" XPath expression, whereas cssShallow "* div" corresponds to "//div".

cssNav :: (ArrowXml a, Css s) => s -> a XmlNavTree XmlNavTree

Like css, except that it operates on navigatable XML trees.

cssShallowNav :: (ArrowXml a, Css s) => s -> a XmlNavTree XmlNavTree

Like cssShallow, except that it operates on navigatable XML trees.

class Css s

Things that can be used as a CSS selector. The String instance uses safeParseCSS to parse the string.

Minimal complete definition

select

Instances

Css PseudoNthClass

Methods

selectDeep :: ArrowXml a => PseudoNthClass -> a XmlNavTree XmlNavTree

select :: ArrowXml a => PseudoNthClass -> a XmlNavTree XmlNavTree

Css PseudoClass

Methods

selectDeep :: ArrowXml a => PseudoClass -> a XmlNavTree XmlNavTree

select :: ArrowXml a => PseudoClass -> a XmlNavTree XmlNavTree

Css SimpleSelector

Methods

selectDeep :: ArrowXml a => SimpleSelector -> a XmlNavTree XmlNavTree

select :: ArrowXml a => SimpleSelector -> a XmlNavTree XmlNavTree

Css SimpleSelectorSeq

Methods

selectDeep :: ArrowXml a => SimpleSelectorSeq -> a XmlNavTree XmlNavTree

select :: ArrowXml a => SimpleSelectorSeq -> a XmlNavTree XmlNavTree

Css Selector

Methods

selectDeep :: ArrowXml a => Selector -> a XmlNavTree XmlNavTree

select :: ArrowXml a => Selector -> a XmlNavTree XmlNavTree

Css SelectorsGroup

Methods

selectDeep :: ArrowXml a => SelectorsGroup -> a XmlNavTree XmlNavTree

select :: ArrowXml a => SelectorsGroup -> a XmlNavTree XmlNavTree

Css [Char]

Methods

selectDeep :: ArrowXml a => [Char] -> a XmlNavTree XmlNavTree

select :: ArrowXml a => [Char] -> a XmlNavTree XmlNavTree

Supported selectors

• Element selectors: *, E, .class, #id
• Relationship selectors: E F, E > F, E + F, E ~ F
• Attribute selectors: [attr], [attr="value"], [attr~="value"], [attr|="value"], [attr^="value"], [attr$="value"], [attr*="value"]
• Pseudo-classes: :not(..), :empty, :root, :first-child, :last-child, :only-child, :nth-child(N), :nth-last-child(N), :first-of-type, :last-of-type, :only-of-type, :nth-of-type(N), :nth-last-of-type(N)

The argument to the :nth-child() family of pseudo-classes can take one of the following forms: 6, 2n, n+2, 3n-1, -n+6, odd, even.

Example

import Text.XML.HXT.Core
import Text.XML.HXT.CSS

test :: IO [XmlTree]
test = runX $ doc >>> css "div > span + p:not(:nth-of-type(3n-1))"
  where
    doc = readDocument [withParseHTML yes, withWarnings no] path
    path = "/path/to/document.html"