Data.CSS.Style

Queries computed styles out of a specially-parsed CSS stylesheet. See in particular QueryableStyleSheet, queryRules, & cascade`.

Documentation

type QueryableStyleSheet parser = QueryableStyleSheet' (ImportanceSplitter (PropertyExpander parser (OrderedRuleStore (WhereLowerer (InterpretedRuleStore StyleIndex))))) parser

A parsed CSS stylesheet from which you can query styles to match an element.

data QueryableStyleSheet' store parser

More generic version of QueryableStyleSheet.

Constructors

QueryableStyleSheet'

Fields

• store :: store

  Internal datastructure for efficient style lookup.

• parser :: parser

  The PropertyParser to use for property syntax validation.

• priority :: Int

  Whether author, useragent, or user styles are currently being parsed.

Instances

(RuleStore s, PropertyParser p) => StyleSheet (QueryableStyleSheet' s p)

Defined in Data.CSS.Style

Methods

setPriority :: Int -> QueryableStyleSheet' s p -> QueryableStyleSheet' s p

addRule :: QueryableStyleSheet' s p -> StyleRule -> QueryableStyleSheet' s p

addAtRule :: QueryableStyleSheet' s p -> Text -> [Token] -> (QueryableStyleSheet' s p, [Token])

queryableStyleSheet :: PropertyParser p => QueryableStyleSheet p

Constructs an empty QueryableStyleSheet'.

queryRules :: (PropertyParser p, RuleStore s) => QueryableStyleSheet' s p -> Element -> HashMap Text [StyleRule']

Looks up style rules matching the specified element, grouped by psuedoelement.

class PropertyParser a where

Defines how to parse CSS properties into an output "style" format.

Minimal complete definition

temp, longhand

Methods

temp :: a

Default styles.

inherit :: a -> a

Creates a style inherited from a parent style.

shorthand :: a -> Text -> [Token] -> [(Text, [Token])]

Expand a shorthand property into longhand properties.

longhand :: a -> a -> Text -> [Token] -> Maybe a

getVars :: a -> Props

Retrieve stored variables, optional.

setVars :: Props -> a -> a

Save variable values, optional.

Instances

PropertyParser TrivialPropertyParser

Defined in Data.CSS.Style.Cascade

Methods

temp :: TrivialPropertyParser

inherit :: TrivialPropertyParser -> TrivialPropertyParser

shorthand :: TrivialPropertyParser -> Text -> [Token] -> [(Text, [Token])]

longhand :: TrivialPropertyParser -> TrivialPropertyParser -> Text -> [Token] -> Maybe TrivialPropertyParser

getVars :: TrivialPropertyParser -> Props

setVars :: Props -> TrivialPropertyParser -> TrivialPropertyParser

PropertyParser p => PropertyParser (VarParser p)

Defined in Data.CSS.Style

Methods

temp :: VarParser p

inherit :: VarParser p -> VarParser p

shorthand :: VarParser p -> Text -> [Token] -> [(Text, [Token])]

longhand :: VarParser p -> VarParser p -> Text -> [Token] -> Maybe (VarParser p)

getVars :: VarParser p -> Props

setVars :: Props -> VarParser p -> VarParser p

PropertyParser p => PropertyParser (TextStyle p)

Defined in Data.CSS.Preprocessor.Text

Methods

temp :: TextStyle p

inherit :: TextStyle p -> TextStyle p

shorthand :: TextStyle p -> Text -> [Token] -> [(Text, [Token])]

longhand :: TextStyle p -> TextStyle p -> Text -> [Token] -> Maybe (TextStyle p)

getVars :: TextStyle p -> Props

setVars :: Props -> TextStyle p -> TextStyle p

cascade :: PropertyParser p => QueryableStyleSheet p -> Element -> Props -> p -> p

Facade over queryRules & cascade` for simple cases you don't care about psuedoelements.

cascade' :: PropertyParser p => [StyleRule'] -> Props -> p -> p

Selects used property values from the given style rules, & populates into a new PropertyParser inheriting from the one given.

data VarParser a

PropertyParser that lowers var() calls before forwarding to another.

Constructors

VarParser

Fields

• vars :: Props
• innerParser :: a

Instances

PropertyParser p => PropertyParser (VarParser p)

Defined in Data.CSS.Style

Methods

temp :: VarParser p

inherit :: VarParser p -> VarParser p

shorthand :: VarParser p -> Text -> [Token] -> [(Text, [Token])]

longhand :: VarParser p -> VarParser p -> Text -> [Token] -> Maybe (VarParser p)

getVars :: VarParser p -> Props

setVars :: Props -> VarParser p -> VarParser p

data TrivialPropertyParser

Gather properties into a hashmap.

Constructors

TrivialPropertyParser (HashMap String [Token])

Instances

Eq TrivialPropertyParser

Defined in Data.CSS.Style.Cascade

Methods

(==) :: TrivialPropertyParser -> TrivialPropertyParser -> Bool

(/=) :: TrivialPropertyParser -> TrivialPropertyParser -> Bool

Show TrivialPropertyParser

Defined in Data.CSS.Style.Cascade

Methods

showsPrec :: Int -> TrivialPropertyParser -> ShowS

show :: TrivialPropertyParser -> String

showList :: [TrivialPropertyParser] -> ShowS

PropertyParser TrivialPropertyParser

Defined in Data.CSS.Style.Cascade

Methods

temp :: TrivialPropertyParser

inherit :: TrivialPropertyParser -> TrivialPropertyParser

shorthand :: TrivialPropertyParser -> Text -> [Token] -> [(Text, [Token])]

longhand :: TrivialPropertyParser -> TrivialPropertyParser -> Text -> [Token] -> Maybe TrivialPropertyParser

getVars :: TrivialPropertyParser -> Props

setVars :: Props -> TrivialPropertyParser -> TrivialPropertyParser

data Element

An inversely-linked tree of elements, to apply CSS selectors to.

Constructors

ElementNode

Fields

• parent :: Maybe Element

  The element's parent in the tree.

• previous :: Maybe Element

  The element's previous sibling in the tree.

• name :: Text

  The element's name.

• namespace :: Text

  The element's namespace.

• attributes :: [Attribute]

  The element's attributes, in sorted order.

data Attribute

A key-value attribute.

Constructors

Attribute Text Text String

Instances

Eq Attribute

Defined in Data.CSS.Style.Common

Methods

(==) :: Attribute -> Attribute -> Bool

(/=) :: Attribute -> Attribute -> Bool

Ord Attribute

Defined in Data.CSS.Style.Common

Methods

compare :: Attribute -> Attribute -> Ordering

(<) :: Attribute -> Attribute -> Bool

(<=) :: Attribute -> Attribute -> Bool

(>) :: Attribute -> Attribute -> Bool

(>=) :: Attribute -> Attribute -> Bool

max :: Attribute -> Attribute -> Attribute

min :: Attribute -> Attribute -> Attribute