{-# LANGUAGE RecordWildCards, OverloadedStrings, DeriveGeneric #-}
-- | Sizes grid cells & positions elements to them.
module Graphics.Layout.Grid(Grid(..), Track(..), GridItem(..), GridItem'(..), Alignment(..),
        buildTrack, buildGrid, setCellBox, enumerate, gridItemBox, cellSize,
        trackMin, trackNat, gridEstWidth, sizeTrackMins, sizeTrackNats, sizeTrackMaxs,
        trackPosition, gridPosition, trackLayout, gridLayout) where

import Data.Either (fromRight)
import Data.Text (Text)
import Data.List (intersperse)
import Graphics.Layout.Box as B

import Debug.Trace (trace)
import GHC.Generics (Generic)
import Control.DeepSeq (NFData)

-- | An element which positions it's children within a grid.
type Grid m n = Size (Track m) (Track n)
-- | The sizes to which children are alonged on a single axis.
data Track x = Track {
    -- | The desired size of each cell.
    -- If Left specifies ratio of excess space to use.
    forall x. Track x -> [Either x Double]
cells :: [Either x Double],
    -- | The minimum amount of space each cell should take.
    forall x. Track x -> [Double]
trackMins :: [Double],
    -- | The ideal amount of space each cell should take.
    forall x. Track x -> [Double]
trackNats :: [Double],
    -- | How much space to add between cells.
    forall x. Track x -> x
gap :: x
}
-- | Which cells a child should be aligned to.
type GridItem = Size GridItem' GridItem'
-- | How a grid child should be aligned per-axis.
data GridItem' = GridItem {
    -- | On which cell should this child start.
    GridItem' -> Int
cellStart :: Int,
    -- | Before which cell should this child end.
    GridItem' -> Int
cellEnd :: Int,
    -- | How to redistribute excess space.
    GridItem' -> Alignment
alignment :: Alignment,
    -- | The minimum amount of space to allocate to this child.
    GridItem' -> Double
minSize :: Double,
    -- | The maximum aount of space to allocate to this child.
    GridItem' -> Double
natSize :: Double
} deriving (ReadPrec [GridItem']
ReadPrec GridItem'
Int -> ReadS GridItem'
ReadS [GridItem']
forall a.
(Int -> ReadS a)
-> ReadS [a] -> ReadPrec a -> ReadPrec [a] -> Read a
readListPrec :: ReadPrec [GridItem']
$creadListPrec :: ReadPrec [GridItem']
readPrec :: ReadPrec GridItem'
$creadPrec :: ReadPrec GridItem'
readList :: ReadS [GridItem']
$creadList :: ReadS [GridItem']
readsPrec :: Int -> ReadS GridItem'
$creadsPrec :: Int -> ReadS GridItem'
Read, Int -> GridItem' -> ShowS
[GridItem'] -> ShowS
GridItem' -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [GridItem'] -> ShowS
$cshowList :: [GridItem'] -> ShowS
show :: GridItem' -> String
$cshow :: GridItem' -> String
showsPrec :: Int -> GridItem' -> ShowS
$cshowsPrec :: Int -> GridItem' -> ShowS
Show, Eq GridItem'
GridItem' -> GridItem' -> Bool
GridItem' -> GridItem' -> Ordering
GridItem' -> GridItem' -> GridItem'
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: GridItem' -> GridItem' -> GridItem'
$cmin :: GridItem' -> GridItem' -> GridItem'
max :: GridItem' -> GridItem' -> GridItem'
$cmax :: GridItem' -> GridItem' -> GridItem'
>= :: GridItem' -> GridItem' -> Bool
$c>= :: GridItem' -> GridItem' -> Bool
> :: GridItem' -> GridItem' -> Bool
$c> :: GridItem' -> GridItem' -> Bool
<= :: GridItem' -> GridItem' -> Bool
$c<= :: GridItem' -> GridItem' -> Bool
< :: GridItem' -> GridItem' -> Bool
$c< :: GridItem' -> GridItem' -> Bool
compare :: GridItem' -> GridItem' -> Ordering
$ccompare :: GridItem' -> GridItem' -> Ordering
Ord, GridItem' -> GridItem' -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: GridItem' -> GridItem' -> Bool
$c/= :: GridItem' -> GridItem' -> Bool
== :: GridItem' -> GridItem' -> Bool
$c== :: GridItem' -> GridItem' -> Bool
Eq, forall x. Rep GridItem' x -> GridItem'
forall x. GridItem' -> Rep GridItem' x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep GridItem' x -> GridItem'
$cfrom :: forall x. GridItem' -> Rep GridItem' x
Generic)
instance NFData GridItem'
-- | How to redistribute excess space.
data Alignment = Start | Mid | End deriving (ReadPrec [Alignment]
ReadPrec Alignment
Int -> ReadS Alignment
ReadS [Alignment]
forall a.
(Int -> ReadS a)
-> ReadS [a] -> ReadPrec a -> ReadPrec [a] -> Read a
readListPrec :: ReadPrec [Alignment]
$creadListPrec :: ReadPrec [Alignment]
readPrec :: ReadPrec Alignment
$creadPrec :: ReadPrec Alignment
readList :: ReadS [Alignment]
$creadList :: ReadS [Alignment]
readsPrec :: Int -> ReadS Alignment
$creadsPrec :: Int -> ReadS Alignment
Read, Int -> Alignment -> ShowS
[Alignment] -> ShowS
Alignment -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Alignment] -> ShowS
$cshowList :: [Alignment] -> ShowS
show :: Alignment -> String
$cshow :: Alignment -> String
showsPrec :: Int -> Alignment -> ShowS
$cshowsPrec :: Int -> Alignment -> ShowS
Show, Int -> Alignment
Alignment -> Int
Alignment -> [Alignment]
Alignment -> Alignment
Alignment -> Alignment -> [Alignment]
Alignment -> Alignment -> Alignment -> [Alignment]
forall a.
(a -> a)
-> (a -> a)
-> (Int -> a)
-> (a -> Int)
-> (a -> [a])
-> (a -> a -> [a])
-> (a -> a -> [a])
-> (a -> a -> a -> [a])
-> Enum a
enumFromThenTo :: Alignment -> Alignment -> Alignment -> [Alignment]
$cenumFromThenTo :: Alignment -> Alignment -> Alignment -> [Alignment]
enumFromTo :: Alignment -> Alignment -> [Alignment]
$cenumFromTo :: Alignment -> Alignment -> [Alignment]
enumFromThen :: Alignment -> Alignment -> [Alignment]
$cenumFromThen :: Alignment -> Alignment -> [Alignment]
enumFrom :: Alignment -> [Alignment]
$cenumFrom :: Alignment -> [Alignment]
fromEnum :: Alignment -> Int
$cfromEnum :: Alignment -> Int
toEnum :: Int -> Alignment
$ctoEnum :: Int -> Alignment
pred :: Alignment -> Alignment
$cpred :: Alignment -> Alignment
succ :: Alignment -> Alignment
$csucc :: Alignment -> Alignment
Enum, Eq Alignment
Alignment -> Alignment -> Bool
Alignment -> Alignment -> Ordering
Alignment -> Alignment -> Alignment
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: Alignment -> Alignment -> Alignment
$cmin :: Alignment -> Alignment -> Alignment
max :: Alignment -> Alignment -> Alignment
$cmax :: Alignment -> Alignment -> Alignment
>= :: Alignment -> Alignment -> Bool
$c>= :: Alignment -> Alignment -> Bool
> :: Alignment -> Alignment -> Bool
$c> :: Alignment -> Alignment -> Bool
<= :: Alignment -> Alignment -> Bool
$c<= :: Alignment -> Alignment -> Bool
< :: Alignment -> Alignment -> Bool
$c< :: Alignment -> Alignment -> Bool
compare :: Alignment -> Alignment -> Ordering
$ccompare :: Alignment -> Alignment -> Ordering
Ord, Alignment -> Alignment -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Alignment -> Alignment -> Bool
$c/= :: Alignment -> Alignment -> Bool
== :: Alignment -> Alignment -> Bool
$c== :: Alignment -> Alignment -> Bool
Eq, forall x. Rep Alignment x -> Alignment
forall x. Alignment -> Rep Alignment x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep Alignment x -> Alignment
$cfrom :: forall x. Alignment -> Rep Alignment x
Generic)
instance NFData Alignment

-- | Constructs a track with default (to-be-computed) values & given cell sizes.
buildTrack :: CastDouble x => [Either x Double] -> Track x
buildTrack :: forall x. CastDouble x => [Either x Double] -> Track x
buildTrack [Either x Double]
cells = forall x. [Either x Double] -> [Double] -> [Double] -> x -> Track x
Track [Either x Double]
cells [] [] forall a b. (a -> b) -> a -> b
$ forall a. CastDouble a => Double -> a
fromDouble Double
0
-- | Constructs a grid with default (to-be-computed) values & given cell sizes.
buildGrid :: (CastDouble m, CastDouble n) =>
        [Either m Double] -> [Either n Double] -> Grid m n
buildGrid :: forall m n.
(CastDouble m, CastDouble n) =>
[Either m Double] -> [Either n Double] -> Grid m n
buildGrid [Either m Double]
rows [Either n Double]
cols = forall m n. n -> m -> Size m n
Size (forall x. CastDouble x => [Either x Double] -> Track x
buildTrack [Either n Double]
cols) (forall x. CastDouble x => [Either x Double] -> Track x
buildTrack [Either m Double]
rows)

-- | Verify that the track is properly formed & can be validly processed.
verifyTrack :: Track x -> [GridItem'] -> Bool
verifyTrack :: forall x. Track x -> [GridItem'] -> Bool
verifyTrack Track x
track [GridItem']
cells' = forall (t :: * -> *). Foldable t => t Bool -> Bool
and [
    GridItem' -> Int
cellStart GridItem'
cell forall a. Ord a => a -> a -> Bool
< forall (t :: * -> *) a. Foldable t => t a -> Int
length (forall x. Track x -> [Either x Double]
cells Track x
track) Bool -> Bool -> Bool
&& GridItem' -> Int
cellStart GridItem'
cell forall a. Ord a => a -> a -> Bool
>= Int
0 Bool -> Bool -> Bool
&&
    GridItem' -> Int
cellEnd GridItem'
cell forall a. Ord a => a -> a -> Bool
< forall (t :: * -> *) a. Foldable t => t a -> Int
length (forall x. Track x -> [Either x Double]
cells Track x
track) Bool -> Bool -> Bool
&& GridItem' -> Int
cellEnd GridItem'
cell forall a. Ord a => a -> a -> Bool
> GridItem' -> Int
cellStart GridItem'
cell
  | GridItem'
cell <- [GridItem']
cells']
-- | Verify that the grid is properly formed & can be validly processed.
verifyGrid :: Grid m n -> [GridItem] -> Bool
verifyGrid :: forall m n. Grid m n -> [GridItem] -> Bool
verifyGrid Grid m n
grid [GridItem]
cells =
    forall x. Track x -> [GridItem'] -> Bool
verifyTrack (forall m n. Size m n -> n
inline Grid m n
grid) (forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> n
inline [GridItem]
cells) Bool -> Bool -> Bool
&& forall x. Track x -> [GridItem'] -> Bool
verifyTrack (forall m n. Size m n -> m
block Grid m n
grid) (forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> m
block [GridItem]
cells)

-- | Compute the minimum size for the track given cell sizes.
-- Refers to computed min sizes if cached.
trackMin :: (n -> Double) -> Track n -> Double
trackMin :: forall n. (n -> Double) -> Track n -> Double
trackMin n -> Double
cb self :: Track n
self@Track { trackMins :: forall x. Track x -> [Double]
trackMins = [] } =
    forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
sum forall a b. (a -> b) -> a -> b
$ forall a. a -> [a] -> [a]
intersperse (n -> Double
cb forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track n
self) [n -> Double
cb n
x | Left n
x <- forall x. Track x -> [Either x Double]
cells Track n
self]
trackMin n -> Double
cb Track n
self = forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
sum forall a b. (a -> b) -> a -> b
$ forall a. a -> [a] -> [a]
intersperse (n -> Double
cb forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track n
self) forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Double]
trackMins Track n
self
-- | Compute the natural size for the track given cell sizes.
-- Refers to compute natural sizes if cached.
trackNat :: (n -> Double) -> Track n -> Double
trackNat :: forall n. (n -> Double) -> Track n -> Double
trackNat n -> Double
cb self :: Track n
self@Track { trackNats :: forall x. Track x -> [Double]
trackNats = [] } =
    forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
sum forall a b. (a -> b) -> a -> b
$ forall a. a -> [a] -> [a]
intersperse (n -> Double
cb forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track n
self) [n -> Double
cb n
x | Left n
x <- forall x. Track x -> [Either x Double]
cells Track n
self]
trackNat n -> Double
cb Track n
self = forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
sum forall a b. (a -> b) -> a -> b
$ forall a. a -> [a] -> [a]
intersperse (n -> Double
cb forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track n
self) forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Double]
trackNats Track n
self

-- | Selects all children entirely on the specified cell.
cellsForIndex :: [GridItem'] -> Int -> [GridItem']
cellsForIndex :: [GridItem'] -> Int -> [GridItem']
cellsForIndex [GridItem']
cells Int
ix =
    [GridItem'
cell | GridItem'
cell <- [GridItem']
cells, GridItem' -> Int
cellStart GridItem'
cell forall a. Eq a => a -> a -> Bool
== Int
ix, GridItem' -> Int
cellStart GridItem'
cell forall a. Eq a => a -> a -> Bool
== forall a. Enum a => a -> a
pred (GridItem' -> Int
cellEnd GridItem'
cell)]
-- | Sets minimum & natural sizes from the given padded box.
setCellBox :: (CastDouble m, CastDouble n) => GridItem -> PaddedBox m n -> GridItem
setCellBox :: forall m n.
(CastDouble m, CastDouble n) =>
GridItem -> PaddedBox m n -> GridItem
setCellBox (Size GridItem'
x GridItem'
y) PaddedBox m n
box = forall m n. n -> m -> Size m n
Size GridItem'
x {
    minSize :: Double
minSize = forall {a} {m}. Num a => PaddedBox m a -> a
B.minWidth forall a b. (a -> b) -> a -> b
$ forall n nn m. (n -> nn) -> PaddedBox m n -> PaddedBox m nn
mapX' forall a. CastDouble a => a -> Double
toDouble PaddedBox m n
box,
    natSize :: Double
natSize = forall {a} {m}. Num a => PaddedBox m a -> a
B.width forall a b. (a -> b) -> a -> b
$ forall n nn m. (n -> nn) -> PaddedBox m n -> PaddedBox m nn
mapX' forall a. CastDouble a => a -> Double
toDouble PaddedBox m n
box
  } GridItem'
y {
    minSize :: Double
minSize = forall {a} {n}. Num a => PaddedBox a n -> a
B.minHeight forall a b. (a -> b) -> a -> b
$ forall m mm n. (m -> mm) -> PaddedBox m n -> PaddedBox mm n
mapY' forall a. CastDouble a => a -> Double
toDouble PaddedBox m n
box,
    natSize :: Double
natSize = forall {a} {n}. Num a => PaddedBox a n -> a
B.height forall a b. (a -> b) -> a -> b
$ forall m mm n. (m -> mm) -> PaddedBox m n -> PaddedBox mm n
mapY' forall a. CastDouble a => a -> Double
toDouble PaddedBox m n
box
  }

-- | Estimate grid width to inform proper width calculation.
gridEstWidth :: Grid y Length -> [GridItem] -> Double
gridEstWidth :: forall y. Grid y Length -> [GridItem] -> Double
gridEstWidth (Size Track Length
cols Track y
_) [GridItem]
childs = forall n. (n -> Double) -> Track n -> Double
trackNat forall a. CastDouble a => a -> Double
toDouble Track Length
cols {
    trackMins :: [Double]
trackMins = Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackMins Double
0 Track Length
cols forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> n
inline [GridItem]
childs,
    trackNats :: [Double]
trackNats = Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackNats Double
0 Track Length
cols forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> n
inline [GridItem]
childs
  }
-- | Calculate minimum sizes for all cells in the track.
-- Sized to fit given children.
sizeTrackMins :: Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackMins :: Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackMins Double
parent Track Length
track [GridItem']
childs = forall a b. (a -> b) -> [a] -> [b]
map forall {b}. (Int, Either Length b) -> Double
inner forall a b. (a -> b) -> a -> b
$ forall {b}. [b] -> [(Int, b)]
enumerate forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track Length
track
  where
    inner :: (Int, Either Length b) -> Double
inner (Int
_, Left (Pixels Double
x)) = Double
x
    inner (Int
_, Left (Percent Double
x)) = Double
x forall a. Num a => a -> a -> a
* Double
parent
    inner arg :: (Int, Either Length b)
arg@(Int
ix, Left Length
Preferred) =
        forall (t :: * -> *) a. (Foldable t, Ord a) => t a -> a
maximum forall a b. (a -> b) -> a -> b
$ (Double
0forall a. a -> [a] -> [a]
:) forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map GridItem' -> Double
natSize forall a b. (a -> b) -> a -> b
$ [GridItem'] -> Int -> [GridItem']
cellsForIndex [GridItem']
childs Int
ix
    inner (Int
ix, Either Length b
_) =
        forall (t :: * -> *) a. (Foldable t, Ord a) => t a -> a
maximum forall a b. (a -> b) -> a -> b
$ (Double
0forall a. a -> [a] -> [a]
:) forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map GridItem' -> Double
minSize forall a b. (a -> b) -> a -> b
$ [GridItem'] -> Int -> [GridItem']
cellsForIndex [GridItem']
childs Int
ix
-- | Compute natural sizes for all cells in the track.
-- Sized to fit given children.
sizeTrackNats :: Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackNats :: Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackNats Double
parent Track Length
track [GridItem']
childs = forall a b. (a -> b) -> [a] -> [b]
map forall {b}. (Int, Either Length b) -> Double
inner forall a b. (a -> b) -> a -> b
$ forall {b}. [b] -> [(Int, b)]
enumerate forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track Length
track
  where
    inner :: (Int, Either Length b) -> Double
inner (Int
_, Left (Pixels Double
x)) = Double
x
    inner (Int
_, Left (Percent Double
x)) = Double
x forall a. Num a => a -> a -> a
* Double
parent
    inner arg :: (Int, Either Length b)
arg@(Int
ix, Left Length
Min) =
        forall (t :: * -> *) a. (Foldable t, Ord a) => t a -> a
maximum forall a b. (a -> b) -> a -> b
$ (Double
0forall a. a -> [a] -> [a]
:) forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map GridItem' -> Double
minSize forall a b. (a -> b) -> a -> b
$ [GridItem'] -> Int -> [GridItem']
cellsForIndex [GridItem']
childs Int
ix
    inner (Int
ix, Either Length b
_) =
        forall (t :: * -> *) a. (Foldable t, Ord a) => t a -> a
maximum forall a b. (a -> b) -> a -> b
$ (Double
0forall a. a -> [a] -> [a]
:) forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map GridItem' -> Double
natSize forall a b. (a -> b) -> a -> b
$ [GridItem'] -> Int -> [GridItem']
cellsForIndex [GridItem']
childs Int
ix
-- | Compute maximum sizes for all cells in the track, sized to the parent element.
sizeTrackMaxs :: Double -> Track Length -> [Double]
sizeTrackMaxs :: Double -> Track Length -> [Double]
sizeTrackMaxs Double
parent Track Length
track = forall a b. (a -> b) -> [a] -> [b]
map (Double -> ((Double, Double), Either Length Double) -> Double
inner Double
fr) forall a b. (a -> b) -> a -> b
$ forall a b. [a] -> [b] -> [(a, b)]
zip [(Double, Double)]
subsizes forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track Length
track
  where
    subsizes :: [(Double, Double)]
subsizes = forall a b. [a] -> [b] -> [(a, b)]
zip (forall x. Track x -> [Double]
trackMins Track Length
track) (forall x. Track x -> [Double]
trackNats Track Length
track)
    fr :: Double
fr = forall a. Ord a => a -> a -> a
Prelude.max Double
0 Double
fr'
    fr' :: Double
fr' = (Double
parent forall a. Num a => a -> a -> a
- Double
estimate)forall a. Fractional a => a -> a -> a
/(forall {a}. (Enum a, Num a) => [Either Length a] -> a
countFRs forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track Length
track)
    estimate :: Double
estimate = forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
sum forall a b. (a -> b) -> a -> b
$ forall a. a -> [a] -> [a]
intersperse (Double -> Length -> Double
lowerLength Double
parent forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track Length
track) forall a b. (a -> b) -> a -> b
$
            forall a b. (a -> b) -> [a] -> [b]
map (Double -> ((Double, Double), Either Length Double) -> Double
inner Double
0) forall a b. (a -> b) -> a -> b
$ forall a b. [a] -> [b] -> [(a, b)]
zip [(Double, Double)]
subsizes forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track Length
track
    inner :: Double -> ((Double, Double), Either Length Double) -> Double
inner Double
_ ((Double, Double)
_, Left (Pixels Double
x)) = Double
x
    inner Double
_ ((Double, Double)
_, Left (Percent Double
x)) = Double
xforall a. Num a => a -> a -> a
*Double
parent
    inner Double
_ ((Double
_, Double
nat), Left Length
Preferred) = Double
nat
    inner Double
_ ((Double
min, Double
_), Left Length
Min) = Double
min
    inner Double
fr ((Double
_, Double
nat), Left Length
Auto) = forall a. Ord a => a -> a -> a
Prelude.min Double
nat Double
fr
    inner Double
fr ((Double, Double)
_, Right Double
x) = Double
xforall a. Num a => a -> a -> a
*Double
fr

-- | Compute the position of all children within the grid.
trackPosition :: Track Double -> [GridItem'] -> [Double]
trackPosition :: Track Double -> [GridItem'] -> [Double]
trackPosition Track Double
self [GridItem']
childs = forall a b. (a -> b) -> [a] -> [b]
map GridItem' -> Double
gridCellPosition [GridItem']
childs
  where
    gridCellPosition :: GridItem' -> Double
gridCellPosition GridItem'
child = Int -> Double
track (GridItem' -> Int
cellStart GridItem'
child) forall a. Num a => a -> a -> a
+ forall {a}. Fractional a => a -> Alignment -> a
align Double
whitespace (GridItem' -> Alignment
alignment GridItem'
child)
      where
        whitespace :: Double
whitespace = Int -> Double
track (GridItem' -> Int
cellEnd GridItem'
child) forall a. Num a => a -> a -> a
- Int -> Double
track (GridItem' -> Int
cellStart GridItem'
child) forall a. Num a => a -> a -> a
- GridItem' -> Double
natSize GridItem'
child
    track :: Int -> Double
track = forall a b c. (a -> b -> c) -> b -> a -> c
flip forall {t} {a} {a}.
(Enum t, Eq t, Num a, Num t) =>
t -> [Either a a] -> a
track' forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track Double
self
    track' :: t -> [Either a a] -> a
track' t
ix (Either a a
size:[Either a a]
sizes) = forall b a. b -> Either a b -> b
fromRight a
0 Either a a
size forall a. Num a => a -> a -> a
+ t -> [Either a a] -> a
track' (forall a. Enum a => a -> a
pred t
ix) [Either a a]
sizes
    track' t
0 [Either a a]
_ = a
0
    track' t
ix [] = forall a. String -> a -> a
trace String
"WARNING! Malformed input table!" a
0
    align :: a -> Alignment -> a
align a
_ Alignment
Start = a
0
    align a
excess Alignment
Mid = a
excessforall a. Fractional a => a -> a -> a
/a
2
    align a
excess Alignment
End = a
excess
-- Compute the maximum size along an axis of a child, for it to be sized to.
cellSize :: CastDouble x => Track x -> GridItem' -> Double
cellSize :: forall x. CastDouble x => Track x -> GridItem' -> Double
cellSize Track x
self GridItem'
child = Int -> Double
track (GridItem' -> Int
cellEnd GridItem'
child) forall a. Num a => a -> a -> a
- Int -> Double
track (GridItem' -> Int
cellStart GridItem'
child)
  where
    track :: Int -> Double
track = forall a b c. (a -> b -> c) -> b -> a -> c
flip forall {a} {t} {a}.
(CastDouble a, Enum t, Eq t, Num t) =>
t -> [Either a a] -> Double
track' forall a b. (a -> b) -> a -> b
$ forall x. Track x -> [Either x Double]
cells Track x
self
    track' :: t -> [Either a a] -> Double
track' t
ix (Either a a
size:[Either a a]
sizes) =
        (forall a. CastDouble a => a -> Double
toDouble forall a b. (a -> b) -> a -> b
$ forall b a. b -> Either a b -> b
fromRight (forall a. CastDouble a => Double -> a
fromDouble Double
0) Either a a
size) forall a. Num a => a -> a -> a
+ t -> [Either a a] -> Double
track' (forall a. Enum a => a -> a
pred t
ix) [Either a a]
sizes
    track' t
0 [Either a a]
_ = Double
0
    track' t
ix [] = forall a. String -> a -> a
trace String
"WARNING! Malformed input table!" Double
0
-- | Compute the maximum size as a PaddedBox of a child, for it to be sized to.
gridItemBox :: (CastDouble x, CastDouble y) => Grid y x -> GridItem -> PaddedBox Double Double
gridItemBox :: forall x y.
(CastDouble x, CastDouble y) =>
Grid y x -> GridItem -> PaddedBox Double Double
gridItemBox (Size Track x
cols Track y
rows) GridItem
cell =
    forall {m} {n}. (Zero m, Zero n) => Size m n -> PaddedBox m n
size2box (forall x. CastDouble x => Track x -> GridItem' -> Double
cellSize Track x
cols (forall m n. Size m n -> n
inline GridItem
cell) forall m n. n -> m -> Size m n
`Size` forall x. CastDouble x => Track x -> GridItem' -> Double
cellSize Track y
rows (forall m n. Size m n -> m
block GridItem
cell))
  where
    size2box :: Size m n -> PaddedBox m n
size2box Size m n
size = forall a. Zero a => a
zero { min :: Size m n
B.min = Size m n
size, max :: Size m n
B.max = Size m n
size, size :: Size m n
B.size = Size m n
size }
-- | Compute the position of all children in a grid.
gridPosition :: Grid Double Double -> [GridItem] -> [(Double, Double)]
gridPosition :: Grid Double Double -> [GridItem] -> [(Double, Double)]
gridPosition (Size Track Double
cols Track Double
rows) [GridItem]
childs =
    Track Double -> [GridItem'] -> [Double]
trackPosition Track Double
rows (forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> n
inline [GridItem]
childs) forall a b. [a] -> [b] -> [(a, b)]
`zip` Track Double -> [GridItem'] -> [Double]
trackPosition Track Double
cols (forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> m
block [GridItem]
childs)
-- | Compute the track sizes & child positions along a single axis.
trackLayout :: Double -> Double -> Track Length -> [GridItem'] ->
        (Track Double, [(Double, GridItem')])
trackLayout :: Double
-> Double
-> Track Length
-> [GridItem']
-> (Track Double, [(Double, GridItem')])
trackLayout Double
parent Double
width Track Length
self [GridItem']
childs = (Track Double
self', forall a b. [a] -> [b] -> [(a, b)]
zip [Double]
positions [GridItem']
childs)
  where
    positions :: [Double]
positions = Track Double -> [GridItem'] -> [Double]
trackPosition Track Double
self' [GridItem']
childs
    self' :: Track Double
self' = Track Length
self {
        cells :: [Either Double Double]
cells = forall a b. (a -> b) -> [a] -> [b]
map forall a b. a -> Either a b
Left [Double]
sizes,
        trackMins :: [Double]
trackMins = [Double]
mins, trackNats :: [Double]
trackNats = [Double]
nats,
        gap :: Double
gap = Double -> Length -> Double
lowerLength Double
width forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track Length
self
      }
    sizes :: [Double]
sizes = Double -> Track Length -> [Double]
sizeTrackMaxs Double
parent Track Length
self { trackMins :: [Double]
trackMins = [Double]
mins, trackNats :: [Double]
trackNats = [Double]
nats }
    mins :: [Double]
mins = Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackMins Double
parent Track Length
self [GridItem']
childs
    nats :: [Double]
nats = Double -> Track Length -> [GridItem'] -> [Double]
sizeTrackNats Double
parent Track Length
self [GridItem']
childs
-- | Compute the track sizes & child positions along both axes.
gridLayout :: Size Double Double -> Grid Length Length -> [GridItem] ->
        (Grid Double Double, [((Double, Double), GridItem)])
gridLayout :: Size Double Double
-> Grid Length Length
-> [GridItem]
-> (Grid Double Double, [((Double, Double), GridItem)])
gridLayout Size Double Double
parent (Size Track Length
cols Track Length
rows) [GridItem]
childs = (Grid Double Double
self', forall a b. [a] -> [b] -> [(a, b)]
zip [(Double, Double)]
positions [GridItem]
childs)
  where
    positions :: [(Double, Double)]
positions = Grid Double Double -> [GridItem] -> [(Double, Double)]
gridPosition Grid Double Double
self' [GridItem]
childs
    self' :: Grid Double Double
self' = forall m n. n -> m -> Size m n
Size Track Double
cols' { gap :: Double
gap = Double -> Length -> Double
lowerLength Double
width forall a b. (a -> b) -> a -> b
$ forall x. Track x -> x
gap Track Length
cols } Track Double
rows'
    (Track Double
rows', [(Double, GridItem')]
_) = Double
-> Double
-> Track Length
-> [GridItem']
-> (Track Double, [(Double, GridItem')])
trackLayout (forall m n. Size m n -> m
block Size Double Double
parent) Double
width Track Length
rows forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> m
block [GridItem]
childs
    width :: Double
width = forall n. (n -> Double) -> Track n -> Double
trackNat forall a. a -> a
id Track Double
cols'
    (Track Double
cols', [(Double, GridItem')]
_) = Double
-> Double
-> Track Length
-> [GridItem']
-> (Track Double, [(Double, GridItem')])
trackLayout (forall m n. Size m n -> n
inline Size Double Double
parent) Double
0 Track Length
cols forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map forall m n. Size m n -> n
inline [GridItem]
childs

-- | Utility for associate an index with each item in a list.
enumerate :: [b] -> [(Int, b)]
enumerate = forall a b. [a] -> [b] -> [(a, b)]
zip [Int
0..]

-- | Utility for summing the divisor used to compute the fr unit.
countFRs :: [Either Length a] -> a
countFRs (Left Length
Auto:[Either Length a]
rest) = forall a. Enum a => a -> a
succ forall a b. (a -> b) -> a -> b
$ [Either Length a] -> a
countFRs [Either Length a]
rest
countFRs (Right a
x:[Either Length a]
rest) = a
x forall a. Num a => a -> a -> a
+ [Either Length a] -> a
countFRs [Either Length a]
rest
countFRs (Either Length a
_:[Either Length a]
rest) = [Either Length a] -> a
countFRs [Either Length a]
rest
countFRs [] = a
0