Graphics.Rendering.Diagrams.Names

This module defines a type of names which can be used for referring to locations within diagrams, and related types.

Names

Atomic names

data AName where

Atomic names. AName is just an existential wrapper around things which are Typeable, Ord and Show.

Constructors

AName :: (Typeable a, Ord a, Show a) => a -> AName

Instances

Eq AName

Ord AName

Show AName

Typeable AName

IsName AName

Names

newtype Name

A (qualified) name is a (possibly empty) sequence of atomic names.

Constructors

Name [AName]

Instances

Eq Name

Ord Name

Show Name

Typeable Name

Monoid Name

Qualifiable Name

Of course, names can be qualified using (.>).

IsName Name

Action Name a

Names don't act on anything else.

Action Name (NameMap v)

A name acts on a name map by qualifying every name in it.

class (Typeable a, Ord a, Show a) => IsName a where

Class for those types which can be used as names. They must support Typeable (to facilitate extracting them from existential wrappers), Ord (for comparison and efficient storage) and Show.

Methods

toName :: a -> Name

Instances

IsName Bool

IsName Char

IsName Double

IsName Float

IsName Int

IsName Integer

IsName String

IsName ()

IsName Name

IsName AName

IsName a => IsName [a]

(IsName a, IsName b) => IsName (a, b)

(IsName a, IsName b, IsName c) => IsName (a, b, c)

(.>) :: (IsName a1, IsName a2) => a1 -> a2 -> Name

Convenient operator for writing qualified names with atomic components of different types. Instead of writing toName a1 <> toName a2 <> toName a3 you can just write a1 .> a2 .> a3.

Qualifiable

class Qualifiable q where

Instances of Qualifiable are things which can be qualified by prefixing them with a name.

Methods

(|>) :: IsName a => a -> q -> q

Qualify with the given name.

Instances

Qualifiable Name

Of course, names can be qualified using (.>).

Qualifiable (NameMap v)

NameMaps are qualifiable: if ns is a NameMap, then a |> ns is the same NameMap except with every name qualified by a.

(HasLinearMap v, InnerSpace v, OrderedField (Scalar v), Monoid m) => Qualifiable (AnnDiagram b v m)

Diagrams can be qualified so that all their named points can now be referred to using the qualification prefix.

Name maps

newtype NameMap v

A NameMap is a map associating names to pairs of points (local origins) and bounding functions. There can be multiple (point, bounding function) pairs associated with each name.

Constructors

NameMap (Map Name [(Point v, TransInv (Bounds v))])

Instances

Action Name (NameMap v)

A name acts on a name map by qualifying every name in it.

Show v => Show (NameMap v)

Monoid (NameMap v)

NameMaps form a monoid with the empty map as the identity, and map union as the binary operation. No information is ever lost: if two maps have the same name in their domain, the resulting map will associate that name to the concatenation of the information associated with that name.

(AdditiveGroup (Scalar v), Fractional (Scalar v), InnerSpace v) => HasOrigin (NameMap v)

(AdditiveGroup (Scalar v), InnerSpace v, Floating (Scalar v), HasLinearMap v) => Transformable (NameMap v)

Qualifiable (NameMap v)

NameMaps are qualifiable: if ns is a NameMap, then a |> ns is the same NameMap except with every name qualified by a.

Constructing name maps

fromNames :: (AdditiveGroup (Scalar v), Ord (Scalar v), IsName a) => [(a, Point v)] -> NameMap v

Construct a NameMap from a list of (name, point) pairs. The bounding functions will be empty.

fromNamesB :: IsName a => [(a, (Point v, Bounds v))] -> NameMap v

Construct a NameMap from a list of associations between names and (point, bounds) pairs.

rememberAs :: IsName a => a -> Point v -> Bounds v -> NameMap v -> NameMap v

Give a name to a point and bounding function.

Searching within name maps

lookupN :: IsName n => n -> NameMap v -> Maybe [(Point v, Bounds v)]

Look for the given name in a name map, returning a list of points and bounding regions associated with that name. If no names match the given name exactly, return all the points associated with names of which the given name is a suffix.