cattrap-0.6.0.0: Lays out boxes according to the CSS Box Model.

Safe Haskell	Safe-Inferred
Language	Haskell2010

Graphics.Layout.CSS.Length

Contents

Orphan instances

Description

Infrastructure for parsing & desugaring length units & keywords, in reference to the selected font.

Synopsis

type Unitted = (Double, Text)
auto :: Unitted
parseLength :: [Token] -> Maybe Unitted
parseLength' :: [Token] -> Maybe (Double, Text)
units :: [Text]
n2f :: (Fractional x, RealFloat x) => NumericValue -> x
finalizeLength :: Unitted -> Font' -> Length
finalizeLengths :: Font' -> [Token] -> [Token]
px2pt :: Font' -> Double -> Double
data Font' = Font' {
- hbFont :: Font
- pattern :: Pattern
- fontHeight :: Char -> Double
- fontAdvance :: Char -> Double
- fontSize :: Double
- rootEm :: Double
- lineheight :: Double
- rlh :: Double
- vh :: Double
- vw :: Double
- vmax :: Double
- vmin :: Double
- scale :: Double
}

Documentation

type Unitted = (Double, Text) Source #

A number+unit, prior to resolving side units. The unit may alternately represent a keyword, in which case the number is ignored & typically set to 0.

auto :: Unitted Source #

The CSS auto keyword.

parseLength :: [Token] -> Maybe Unitted Source #

Parse a pre-tokenized CSS length value.

parseLength' :: [Token] -> Maybe (Double, Text) Source #

Variant of parseLength which supports min-content & max-content keywords.

units :: [Text] Source #

Supported length units.

n2f :: (Fractional x, RealFloat x) => NumericValue -> x Source #

Convert a lexed number to a Double.

finalizeLength :: Unitted -> Font' -> Length Source #

Resolve a parsed length according to the sizing parameters in a given Font'.

finalizeLengths :: Font' -> [Token] -> [Token] Source #

Convert any length-units in the given CSS tokens to device pixels

px2pt :: Font' -> Double -> Double Source #

Convert from a computed length to the "pt" unit.

data Font' Source #

A Harfbuzz font with sizing parameters.

Constructors

Fields

hbFont :: Font
The Harfbuzz font used to shape text & query character-size information.
pattern :: Pattern
The FontConfig query result. Useful to incorporate into output rendering.
fontHeight :: Char -> Double
Query the height of a character. Used for cap, ex, or ic units.
fontAdvance :: Char -> Double
Query the width of a character, used for ch unit.
fontSize :: Double
The desired font-size, used for em unit.
rootEm :: Double
The root font's size, used for rem unit.
lineheight :: Double
The desired line-height, used for lh unit.
rlh :: Double
The root font's line-height, used for rlh unit.
vh :: Double
Scale-factor for vh unit.
vw :: Double
Scale-factor for vw unit.
vmax :: Double
Scale-factor for vmax unit.
vmin :: Double
Scale-factor for vmin unit.
scale :: Double
How many device pixels in a CSS px?

Instances

Instances details

Show Font' Source #
Instance details Defined in Graphics.Layout.CSS.Length Methods showsPrec :: Int -> Font' -> ShowS # show :: Font' -> String # showList :: [Font'] -> ShowS #
Eq Font' Source #
Instance details Defined in Graphics.Layout.CSS.Length Methods (==) :: Font' -> Font' -> Bool # (/=) :: Font' -> Font' -> Bool #
(PropertyParser x, Zero m, Zero n) => Default (UserData m n x) Source #
Instance details Defined in Graphics.Layout.CSS Methods def :: UserData m n x Source #

Orphan instances

Zero Unitted Source #
Instance details Methods zero :: Unitted Source #