Safe Haskell	Safe-Inferred
Language	Haskell2010

Graphics.Vty.DisplayAttributes

Synopsis

fixDisplayAttr :: FixedAttr -> Attr -> FixedAttr
data DisplayAttrDiff = DisplayAttrDiff {
- styleDiffs :: [StyleStateChange]
- foreColorDiff :: DisplayColorDiff
- backColorDiff :: DisplayColorDiff
- urlDiff :: URLDiff
}
simplifyStyleDiffs :: [StyleStateChange] -> [StyleStateChange] -> [StyleStateChange]
simplifyColorDiffs :: DisplayColorDiff -> DisplayColorDiff -> DisplayColorDiff
simplifyUrlDiffs :: URLDiff -> URLDiff -> URLDiff
data DisplayColorDiff
- = ColorToDefault
- | NoColorChange
- | SetColor !Color
data StyleStateChange
- = ApplyStandout
- | RemoveStandout
- | ApplyItalic
- | RemoveItalic
- | ApplyStrikethrough
- | RemoveStrikethrough
- | ApplyUnderline
- | RemoveUnderline
- | ApplyReverseVideo
- | RemoveReverseVideo
- | ApplyBlink
- | RemoveBlink
- | ApplyDim
- | RemoveDim
- | ApplyBold
- | RemoveBold
data URLDiff
- = LinkTo !ByteString
- | NoLinkChange
- | EndLink
displayAttrDiffs :: FixedAttr -> FixedAttr -> DisplayAttrDiff
diffURL :: Maybe Text -> Maybe Text -> URLDiff
diffColor :: Maybe Color -> Maybe Color -> DisplayColorDiff
diffStyles :: Style -> Style -> [StyleStateChange]

Documentation

fixDisplayAttr :: FixedAttr -> Attr -> FixedAttr Source #

Given the previously applied display attributes as a FixedAttr and the current display attributes as an Attr produces a FixedAttr that represents the current display attributes. This is done by using the previously applied display attributes to remove the KeepCurrent abstraction.

data DisplayAttrDiff Source #

difference between two display attributes. Used in the calculation of the operations required to go from one display attribute to the next.

Previously, vty would reset display attributes to default then apply the new display attributes. This turned out to be very expensive: A *lot* more data would be sent to the terminal than required.

Constructors

DisplayAttrDiff
Fields styleDiffs :: [StyleStateChange] foreColorDiff :: DisplayColorDiff backColorDiff :: DisplayColorDiff urlDiff :: URLDiff

Instances

Instances details

Monoid DisplayAttrDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods mempty :: DisplayAttrDiff # mappend :: DisplayAttrDiff -> DisplayAttrDiff -> DisplayAttrDiff # mconcat :: [DisplayAttrDiff] -> DisplayAttrDiff #
Semigroup DisplayAttrDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods (<>) :: DisplayAttrDiff -> DisplayAttrDiff -> DisplayAttrDiff # sconcat :: NonEmpty DisplayAttrDiff -> DisplayAttrDiff # stimes :: Integral b => b -> DisplayAttrDiff -> DisplayAttrDiff #
Show DisplayAttrDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods showsPrec :: Int -> DisplayAttrDiff -> ShowS # show :: DisplayAttrDiff -> String # showList :: [DisplayAttrDiff] -> ShowS #

simplifyStyleDiffs :: [StyleStateChange] -> [StyleStateChange] -> [StyleStateChange] Source #

Used in the computation of a final style attribute change.

simplifyColorDiffs :: DisplayColorDiff -> DisplayColorDiff -> DisplayColorDiff Source #

Consider two display color attributes diffs. What display color attribute diff are these equivalent to?

simplifyUrlDiffs :: URLDiff -> URLDiff -> URLDiff Source #

Consider two URL changes, which are mostly going to be the latter unless the latter specifies no change.

data DisplayColorDiff Source #

Difference between two display color attribute changes.

Constructors

ColorToDefault
NoColorChange
SetColor !Color

Instances

Instances details

Show DisplayColorDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods showsPrec :: Int -> DisplayColorDiff -> ShowS # show :: DisplayColorDiff -> String # showList :: [DisplayColorDiff] -> ShowS #
Eq DisplayColorDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods (==) :: DisplayColorDiff -> DisplayColorDiff -> Bool # (/=) :: DisplayColorDiff -> DisplayColorDiff -> Bool #

data StyleStateChange Source #

Style attribute changes are transformed into a sequence of apply/removes of the individual attributes.

Constructors

ApplyStandout
RemoveStandout
ApplyItalic
RemoveItalic
ApplyStrikethrough
RemoveStrikethrough
ApplyUnderline
RemoveUnderline
ApplyReverseVideo
RemoveReverseVideo
ApplyBlink
RemoveBlink
ApplyDim
RemoveDim
ApplyBold
RemoveBold

Instances

Instances details

Show StyleStateChange Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods showsPrec :: Int -> StyleStateChange -> ShowS # show :: StyleStateChange -> String # showList :: [StyleStateChange] -> ShowS #
Eq StyleStateChange Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods (==) :: StyleStateChange -> StyleStateChange -> Bool # (/=) :: StyleStateChange -> StyleStateChange -> Bool #

data URLDiff Source #

Constructors

LinkTo !ByteString
NoLinkChange
EndLink

Instances

Instances details

Show URLDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods showsPrec :: Int -> URLDiff -> ShowS # show :: URLDiff -> String # showList :: [URLDiff] -> ShowS #
Eq URLDiff Source #
Instance details Defined in Graphics.Vty.DisplayAttributes Methods (==) :: URLDiff -> URLDiff -> Bool # (/=) :: URLDiff -> URLDiff -> Bool #

displayAttrDiffs :: FixedAttr -> FixedAttr -> DisplayAttrDiff Source #

Determines the diff between two display&color attributes. This diff determines the operations that actually get output to the terminal.

diffURL :: Maybe Text -> Maybe Text -> URLDiff Source #

diffColor :: Maybe Color -> Maybe Color -> DisplayColorDiff Source #

diffStyles :: Style -> Style -> [StyleStateChange] Source #