Safe Haskell	Safe-Inferred
Language	Haskell2010

Language.Drasil.Display

Contents

Symbol

Description

Re-export display-related functions and types to simplify external use.

Synopsis

data Decoration
- = Hat
- | Vector
- | Prime
- | Delta
- | Magnitude
data Symbol
- = Variable String
- | Label String
- | Integ Int
- | Special Special
- | Atop Decoration Symbol
- | Corners [Symbol] [Symbol] [Symbol] [Symbol] Symbol
- | Concat [Symbol]
- | Empty
compsy :: Symbol -> Symbol -> Ordering

Symbol

data Decoration Source #

Decorations on symbols/characters such as hats or Vector representations (determines bolding, italics, etc).

Constructors

Hat	Places a `^` on top of a symbol.
Vector	Makes a symbol bold.
Prime	Appends a `'` to a symbol.
Delta	Prepends a `Δ` to a symbol.
Magnitude	Places `\|\|` before and after a symbol.

Instances

Instances details

Eq Decoration Source #
Instance details Defined in Language.Drasil.Symbol Methods (==) :: Decoration -> Decoration -> Bool # (/=) :: Decoration -> Decoration -> Bool #
Ord Decoration Source #
Instance details Defined in Language.Drasil.Symbol Methods compare :: Decoration -> Decoration -> Ordering # (<) :: Decoration -> Decoration -> Bool # (<=) :: Decoration -> Decoration -> Bool # (>) :: Decoration -> Decoration -> Bool # (>=) :: Decoration -> Decoration -> Bool # max :: Decoration -> Decoration -> Decoration # min :: Decoration -> Decoration -> Decoration #

data Symbol Source #

A Symbol is actually going to be a graphical description of what gets rendered as a (unique) symbol. This is actually NOT based on semantics at all, but just a description of how things look.

Symbols can be:

Variable (string such as "x" that represent a value that can vary)
Label (strings such as "max" or "target" that represent a single idea)
Symbol characters (ex. unicode)
Decorated symbols using Atop
Concatenations of symbols, including subscripts and superscripts
Empty! (this is to give this a monoid-like flavour)

Constructors

Variable String	Basic variable name creation.
Label String	For when symbols need more context, but we don't want to add a new variable name. For example, `v_f` may be encoded as `Concat [variable "v", label "f"]`.
Integ Int	For using numbers in Symbols.
Special Special	For now, special characters are the degree and partial differentiation symbols. These should eventually move elsewhere and the `Symbol` type removed.
Atop Decoration Symbol	Used to decorate symbols. For things like vectors (which need to be bold), primes, magnitudes, etc. See `Decoration` for more details.
Corners [Symbol] [Symbol] [Symbol] [Symbol] Symbol	Order of Symbols: upleft lowleft upright lowright base. Ex: Corners [1] [2] [3] [4] [5] Visually: [1] [3] [5] [2] [4]
Concat [Symbol]	Concatentation of two symbols: `[s1, s2] -> s1s2`
Empty	Placeholder for when a symbol is not needed.

Instances

Instances details

Monoid Symbol Source #	Symbols can be empty or concatenated.
Instance details Defined in Language.Drasil.Symbol Methods mempty :: Symbol # mappend :: Symbol -> Symbol -> Symbol # mconcat :: [Symbol] -> Symbol #
Semigroup Symbol Source #	Symbols may be concatenated.
Instance details Defined in Language.Drasil.Symbol Methods (<>) :: Symbol -> Symbol -> Symbol # sconcat :: NonEmpty Symbol -> Symbol # stimes :: Integral b => b -> Symbol -> Symbol #
Eq Symbol Source #
Instance details Defined in Language.Drasil.Symbol Methods (==) :: Symbol -> Symbol -> Bool # (/=) :: Symbol -> Symbol -> Bool #

compsy :: Symbol -> Symbol -> Ordering Source #

The default compare function that sorts all the lower case symbols after the upper case ones.

Comparation is used twice for each Atomic case, once for making sure they are the same letter, once for case sensitive. As far as this comparison is considered, Δ is a "decoration" and ignored unless the compared symbols are the exact same, in which case it is ordered after the undecorated symbol.

Superscripts and subscripts are ordered after the base symbols (because they add additional context to a symbol). For example: `v_f^{AB}` (expressed in LaTeX notation for clarity), where v_f is a final velocity, and the `^{AB}` adds context that it is the final velocity between points A and B. In these cases, the sorting of `v_f^{AB}` should be following v_f as it is logical to place it with its parent concept.