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beautifications

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This commit is contained in:
Armin Friedl 2016-08-12 23:06:03 +02:00
parent e9aaddc974
commit 77081e3437
1 changed files with 75 additions and 66 deletions
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135
src/App/Fontifier.hs
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@ -11,23 +11,41 @@ import qualified Text.Regex.TDFA as Tdfa
---- Various ---- ---- Various ----
import Data.Array import Data.Array
import Data.String import Data.String
import Lens.Micro ((^.), _1, _2) import Lens.Micro ((^.), _1, _2)
{---- Type Definitions ----} {---- Type Definitions ----}
-- defines an attribute for a text slice -- defines an attribute for a text slice
data Fontification = FT { ftStart :: Int -- start index in string data Fontification = FT { ftStart :: Int -- start index in string
, ftEnd :: Int -- end index in string , ftEnd :: Int -- end index in string
, ftAttr :: AttrName -- attribute name , ftAttr :: AttrName -- attribute name
} deriving (Show) } deriving (Show)
type Fontifications = [Fontification]
type Fontifier = (CheckString -> Fontifications)
type Slice = (Int,Int)
type Slices = [Slice]
type MatchResult = [Tdfa.MatchArray]
type CheckString = String
type Regex = Tdfa.Regex
{---- Infix Operators ----}
infixl 9 §:
(§:) :: (AttrName -> a) -> String -> a
f §: s = f $ attrName s
infixl 9 §~
(§~) :: (Regex -> a) -> String -> a
f §~ s = f $ Tdfa.makeRegex s
-- reduces precedence of (.) to work
-- more "naturally" in combination with
-- §: / §~
infixr 8 §.
(§.) :: (b -> c) -> (a -> b) -> a -> c
f §. s = f . s
type Fontifications = [Fontification]
type Fontifier = (CheckString -> Fontifications)
type Slice = (Int,Int)
type Slices = [Slice]
type MatchResult = [Tdfa.MatchArray]
type RegexStr = String
type CheckString = String
{---- Functions ----} {---- Functions ----}
@ -60,27 +78,35 @@ concatApply (f:fs) s = f s ++ concatApply fs s
{--- Fontifier ---} {--- Fontifier ---}
{-- Regex-Based Fontifier --}
-- TODO: most of the .+ don't actually allow any whitespace-like character
-- maybe we should use \w/(:word:) instead?
-- :: CheckString -> Fontifications -- :: CheckString -> Fontifications
assignments = slicesToFT (attrName "assignment") . matchStripCmts "\\**.+=.+;"
guards = slicesToFT (attrName "guard") . matchStripCmts "\\[.+:.+\\]" {- Regex-Based -}
returns = slicesToFT (attrName "return") . matchStripCmts "\\^.+;"
strings = slicesToFT (attrName "string") . matchStripCmts "\"[^%]*\"" assignments = slicesToFT §: "assignment" §. matchStripCmts §~ "\\**.+=.+;"
comments = slicesToFT (attrName "comment") . matchAll "%.*" guards = slicesToFT §: "guard" §. matchStripCmts §~ "\\[.+:.+\\]"
returns = slicesToFT §: "return" §. matchStripCmts §~ "\\^.+;"
strings = slicesToFT §: "string" §. matchStripCmts §~ "\"[^%]*\""
comments = slicesToFT §: "comment" §. matchAll §~ "%.*"
{- Utility Functions (Regex) -} {- Custom/Function-Based -}
matchAll :: RegexStr -> CheckString -> Slices
matchAll regexString bs = let regex = Tdfa.makeRegex regexString :: Tdfa.Regex
in matchesToSlices $ Tdfa.matchAll regex bs
matchStripCmts :: RegexStr -> CheckString -> Slices untermStrings = slicesToFT §: "err_unterm" §. unterm §~ "\"[^%]*\"[^\\;]"
untermAssignments s = slicesToFT §: "err_unterm" §. prune (assignments s) $ (unterm §~ "\"[^%]*\"[^\\;]") s
untermReturns s = slicesToFT §: "err_unterm" §. prune (returns s) $ (unterm §~ "\\^[^;%]+[^\\;]") s
mismatchedBrackets s = concatMap (mismatched §: "err_brackets" $ s) [('(',')'),('[',']'),('{','}')]
{--- Utility Functions ---}
{- Regex Utilities -}
matchAll :: Regex -> CheckString -> Slices
matchAll r s = matchesToSlices $ Tdfa.matchAll r s
matchStripCmts :: Regex -> CheckString -> Slices
matchStripCmts r s = stripComments $ matchAll r s matchStripCmts r s = stripComments $ matchAll r s
where commentsFts = comments s where commentsFts = comments s
stripComments [] = [] stripComments [] = []
@ -94,13 +120,7 @@ matchesToSlices (m:ms) = let match = m ! 0 -- get 1st elem of match array (this
in (fst match, (fst match) + (snd match)): matchesToSlices ms in (fst match, (fst match) + (snd match)): matchesToSlices ms
{- Custom Fontifier Utilities -}
{-- Custom/Function-Based Fontifier --}
mismatchedBrackets :: CheckString -> Fontifications
mismatchedBrackets s = concatMap fontifyMismatched pairs
where fontifyMismatched = mismatched (attrName "err_brackets") s
pairs = [('(',')'),('[',']'),('{','}')]
mismatched :: AttrName -> CheckString -> (Char, Char) -> Fontifications mismatched :: AttrName -> CheckString -> (Char, Char) -> Fontifications
mismatched attrName s (open, close) = slicesToFT attrName $ (fst orphans)++(snd orphans) -- (fst orphans) = open without close, mismatched attrName s (open, close) = slicesToFT attrName $ (fst orphans)++(snd orphans) -- (fst orphans) = open without close,
@ -108,36 +128,26 @@ mismatched attrName s (open, close) = slicesToFT attrName $ (fst orphans)++(snd
checkFts = strings s ++ comments s checkFts = strings s ++ comments s
mismatched' [] _ ophs = ophs mismatched' [] _ ophs = ophs
mismatched' (curChr:restStr) ix ophs mismatched' (curChr:restStr) ix ophs
| isFontified (ix,ix+1) checkFts = mismatched' restStr (ix+1) ophs -- already fontified? -> continue | alreadyFontified = proceedWith ophs
| curChr == open = mismatched' restStr (ix+1) ((ix, ix+1):(fst ophs), snd ophs) -- open? -> assume orphan until proven otherwise | curChr == open = proceedWith addOrphanedOpen -- assume orphan until proven otherwise
| curChr == close = case null (fst ophs) of | curChr == close = proceedWith $ if orphanedOpenExists then adoptNearestOpen else addOrphanedClose
True -> mismatched' restStr (ix+1) (fst ophs, (ix,ix+1):(snd ophs)) -- close but no orphaned open? -> close is surely an orphan | otherwise = proceedWith ophs
False -> mismatched' restStr (ix+1) (tail (fst ophs), snd ophs) -- close and ophaned open exists? -> delete nearest orphaned open -- try just reading the cases, ignore the where
| otherwise = mismatched' restStr (ix+1) ophs -- neither open nor close? -> continue where proceedWith = mismatched' restStr (ix+1)
addOrphanedOpen = ((ix,ix+1):(fst ophs), snd ophs) -- (ix,ix+1) = slice of curChr
addOrphanedClose = (fst ophs, (ix,ix+1):(snd ophs))
adoptNearestOpen = (tail (fst ophs), snd ophs) -- delete nearest orphaned open
orphanedOpenExists = not $ null (fst ophs)
alreadyFontified = isFontified (ix,ix+1) checkFts
unterm :: Regex -> CheckString -> Slices
untermStrings :: CheckString -> Fontifications
untermStrings = let regex = Tdfa.makeRegex ("\"[^%]*\"[^\\;]"::String) :: Tdfa.Regex
in slicesToFT (attrName "err_unterm") . unterm regex
untermAssignments :: CheckString -> Fontifications
untermAssignments s = let regex = Tdfa.makeRegex ("\\**[^%]+=[^;%]+[^\\;]"::String) :: Tdfa.Regex
in slicesToFT (attrName "err_unterm") . prune (assignments s) $ unterm regex s
untermReturns :: CheckString -> Fontifications
untermReturns s = let regex = Tdfa.makeRegex ("\\^[^;%]+[^\\;]"::String) :: Tdfa.Regex
in slicesToFT (attrName "err_unterm") . prune (returns s) $ unterm regex s
unterm :: Tdfa.Regex -> CheckString -> Slices
unterm regex s = lastChar untermed unterm regex s = lastChar untermed
where commentsFts = comments s where commentsFts = comments s
untermed = prune commentsFts $ matchesToSlices $ Tdfa.matchAll regex s untermed = prune commentsFts $ matchesToSlices $ Tdfa.matchAll regex s
mismatchedQuotes :: CheckString -> Fontifications mismatchedQuotes :: CheckString -> Fontifications
mismatchedQuotes s = slicesToFT (attrName "err_quotes") $ firstChar untermed mismatchedQuotes s = slicesToFT §: "err_quotes" $ firstChar untermed
where regex = Tdfa.makeRegex ("\""::String) :: Tdfa.Regex where matchedSlices = matchesToSlices $ (Tdfa.matchAll §~ "\"") s
matchedSlices = matchesToSlices $ Tdfa.matchAll regex s
untermed = let commentsFts = comments s; stringsFts = strings s untermed = let commentsFts = comments s; stringsFts = strings s
in negPrune (commentsFts++stringsFts) matchedSlices in negPrune (commentsFts++stringsFts) matchedSlices
negPrune _ [] = [] negPrune _ [] = []
@ -148,7 +158,7 @@ mismatchedQuotes s = slicesToFT (attrName "err_quotes") $ firstChar untermed
{-- Utility Functions (General) --} {- General Fontification Utilities -}
prune :: Fontifications -> Slices -> Slices prune :: Fontifications -> Slices -> Slices
prune _ [] = [] prune _ [] = []
@ -168,7 +178,6 @@ firstChar [] = []
firstChar (curSlice:slices) = let start = fst curSlice firstChar (curSlice:slices) = let start = fst curSlice
in (start, start+1): firstChar slices in (start, start+1): firstChar slices
slicesToFT :: AttrName -> Slices -> Fontifications slicesToFT :: AttrName -> Slices -> Fontifications
slicesToFT attrName slices = slicesToFT' slices slicesToFT attrName slices = slicesToFT' slices
where slicesToFT' [] = [] where slicesToFT' [] = []
@ -182,11 +191,11 @@ isFontified slice@(start,end) (f:fs)
| ftStart f <= start && ftEnd f >= end = True | ftStart f <= start && ftEnd f >= end = True
| otherwise = isFontified slice fs | otherwise = isFontified slice fs
-- checks if a slice penetrats a fontification -- checks if a slice penetrates a fontification
penetratesFT :: Slice -> Fontifications -> Bool penetratesFT :: Slice -> Fontifications -> Bool
penetratesFT _ [] = False penetratesFT _ [] = False
penetratesFT slice@(start,end) (f:fs) penetratesFT slice@(start,end) (f:fs)
| ftStart f <= start && ftEnd f >= end = True -- yummie sandwich | ftStart f <= start && ftEnd f >= end = True -- yummie sandwich
| ftStart f >= start && ftStart f <= end = True -- applied backstabbing | ftStart f >= start && ftStart f <= end = True -- applied backstabbing
| ftEnd f <= end && ftEnd f >= start = True -- Et tu, Brute? :( | ftEnd f <= end && ftEnd f >= start = True -- Et tu, Brute? :(
| otherwise = penetratesFT slice fs | otherwise = penetratesFT slice fs -- See ya at tha crossroads