Undo everything to switch over to an event based parser
This commit is contained in:
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25 changed files with 1 additions and 1414 deletions
47
Djot.ipkg
47
Djot.ipkg
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@ -1,47 +0,0 @@
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package Djot
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version = 0.1.0
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authors = "Nathan McCarty"
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-- maintainers =
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-- license =
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-- brief =
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-- readme =
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-- homepage =
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-- sourceloc =
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-- bugtracker =
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-- the Idris2 version required (e.g. langversion >= 0.5.1)
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-- langversion
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-- packages to add to search path
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depends = SSG
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-- modules to install
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-- modules =
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-- main file (i.e. file to load at REPL)
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main = Djot
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-- name of executable
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executable = "djot"
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-- opts =
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sourcedir = "src"
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-- builddir =
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-- outputdir =
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-- script to run before building
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-- prebuild =
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-- script to run after building
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-- postbuild =
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-- script to run after building, before installing
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-- preinstall =
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-- script to run after installing
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-- postinstall =
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-- script to run before cleaning
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-- preclean =
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-- script to run after cleaning
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-- postclean =
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9
SSG.ipkg
9
SSG.ipkg
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@ -22,14 +22,7 @@ depends = structures
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, prettier
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-- modules to install
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modules = SSG.Parser.Core
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, SSG.Parser.Util
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, SSG.Djot
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, SSG.Djot.Common
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, SSG.Djot.Inline
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, SSG.Djot.Block
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, SSG.Djot.Render
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, SSG.HTML
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modules = SSG.HTML
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, SSG.HTML.ElementTypes
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-- main file (i.e. file to load at REPL)
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27
src/Djot.idr
27
src/Djot.idr
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@ -1,27 +0,0 @@
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module Djot
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import System
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import System.File
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import SSG.Djot
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import SSG.HTML
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import Text.PrettyPrint.Bernardy
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main : IO ()
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main = do
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args <- getArgs
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case args of
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[_, file] => do
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Right contents <- readFile file
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| Left err => printLn err
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let parsed = djot contents
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putStr . render $ renderHtml parsed
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[_, "raw", file] => do
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Right contents <- readFile file
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| Left err => printLn err
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let parsed = djot contents
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putStrLn . Doc.render (Opts 80) $ pretty parsed
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_ => do
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putStrLn "?"
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exitFailure
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@ -1,17 +0,0 @@
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module SSG.Djot
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import SSG.Parser.Util
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import Control.Eff
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import public SSG.Djot.Inline as SSG.Djot
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import public SSG.Djot.Block as SSG.Djot
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import public SSG.Djot.Render as SSG.Djot
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export
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||| Parse a djot document
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djot : String -> List Block
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djot str =
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case runPS blocks str of
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Left _ => []
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Right x => x
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@ -1,259 +0,0 @@
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module SSG.Djot.Block
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import SSG.Parser.Core
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import SSG.Parser.Util
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import SSG.Djot.Common
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import SSG.Djot.Inline
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import Data.List1
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import Data.Vect
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import Data.Nat
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import Data.String
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import Control.Eff
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import Derive.Prelude
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import Derive.Pretty
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-- For iutils unit tests
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import System
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import Debug.Trace
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%language ElabReflection
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--*****************
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--* Data Types *
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--*****************
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public export
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data HeaderLevel : Type where
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H1 : HeaderLevel
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H2 : HeaderLevel
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H3 : HeaderLevel
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H4 : HeaderLevel
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H5 : HeaderLevel
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H6 : HeaderLevel
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%runElab derive "HeaderLevel" [Eq, Pretty]
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export
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Show HeaderLevel where
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show H1 = "1"
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show H2 = "2"
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show H3 = "3"
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show H4 = "4"
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show H5 = "5"
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show H6 = "6"
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namespace HeaderLevel
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public export
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integerToHeader : Integer -> Maybe HeaderLevel
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integerToHeader 1 = Just H1
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integerToHeader 2 = Just H2
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integerToHeader 3 = Just H3
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integerToHeader 4 = Just H4
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integerToHeader 5 = Just H5
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integerToHeader 6 = Just H6
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integerToHeader i = Nothing
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export
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fromInteger : (x : Integer) -> {auto prf : IsJust (integerToHeader x)} -> HeaderLevel
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fromInteger x = fromJust $ integerToHeader x
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public export
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data Block : Type where
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Paragraph : (contents : List1 Inline) -> Block
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Heading : (level : HeaderLevel) -> (contents : List1 Inline) -> Block
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BlockQuote : (contents : List1 Block) -> Block
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%runElab derive "List1" [Pretty]
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%runElab derive "Block" [Show, Eq, Pretty]
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--*****************
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--* Parsing Utils *
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--*****************
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-- Parse a prefixed line, stripping the prefix
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prefixedLine : (pfx : PS b) -> PS String
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prefixedLine pfx = do
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_ <- pfx
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cs <- line
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pure $ pack cs
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-- Parses a block prefixed by the given character string with the given parser
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parsePrefixedBlock : (pfx : PS b) -> (parser : PS a) -> PS a
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parsePrefixedBlock pfx parser = do
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lines <- atLeastOne "No lines in block" $ prefixedLine pfx
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let block = joinBy "\n" . forget $ lines
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runPS' parser block
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--*****************
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--* Syntax *
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--*****************
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-- Forward declare our top level parsers, so we can get mutually recursive
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export
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block : PS Block
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export
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blocks : PS (List Block)
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---------------
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-- Paragraph --
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---------------
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paragraph : PS Block
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paragraph = do
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inlines <- inline
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blankLineOrEnd
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pure $ Paragraph inlines
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-------------
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-- Heading --
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-------------
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headingPrefix : (level : Nat) -> PS String
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headingPrefix level = oneOfE "" [notPrefixP, prefixP]
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where
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notPrefixed : PS ()
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notPrefixed = do
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-- peek the first character to check and see if its a heading marker
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Just [first] <- peek 1
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| _ => throw "End of File"
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case first of
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'#' => throw "Header prefix"
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_ => pure ()
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notPrefixP : PS String
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notPrefixP = do
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notPrefixed
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map pack $ many space
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prefixP : PS String
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prefixP = do
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levelMarker <- atLeastOne "Expected Header Marker" $ thisString "#"
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ws <- atLeastOne "Expected Whitespace after header marker" $ space
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case length levelMarker == level of
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False => throw "Mismatched levels"
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True => pure $ (concat . forget $ levelMarker) ++ (pack . forget $ ws)
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heading : PS Block
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heading = do
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-- peek the level marker, then parse as a prefixed block
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state <- save
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levelMarker <- atLeastOne "Expected Header Marker" $ thisString "#"
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ws <- atLeastOne "Expected Whitespace after header marker" $ space
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case integerToHeader (natToInteger $ length levelMarker) of
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Nothing => throw "Invalid header length: \{show $ length levelMarker}"
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Just level => do
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load state
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inlines <- parsePrefixedBlock (headingPrefix (length levelMarker)) inline
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-- djot demands a blank line or the end of file after a heading
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_ <- many blankLine
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pure $ Heading level inlines
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----------------
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-- Blockquote --
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----------------
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blockquote : PS Block
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blockquote = do
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blocks <- parsePrefixedBlock (oneOfE "" [prefixedEmpty, thisString "> "]) blocks
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case blocks of
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[] => throw "Empty block quote"
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(x :: xs) => pure $ BlockQuote (x ::: xs)
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where
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prefixedEmpty : PS String
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prefixedEmpty = do
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_ <- thisString ">"
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-- peek the rest of the line, make sure it's empty
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state <- save
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cs <- many nonTerminal
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load state
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if all isHorizontalWhitespace cs
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then pure ">"
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else throw "Invalid blockquote line"
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--------------------------
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-- Overall Block Parser --
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--------------------------
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block = do
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-- eat up any blank lines
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_ <- many blankLine
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oneOfE "" [
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heading
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, blockquote
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, paragraph
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]
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blocks = many block
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--*****************
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--* Unit Tests *
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--*****************
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------------------------
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-- Block Syntax Tests --
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------------------------
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-- @@test Paragraph
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blockParagraphSmoke : IO Bool
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blockParagraphSmoke =
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let input = "Hello World"
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ref = [Paragraph (inlineFromString' "Hello World")]
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in golden input ref blocks
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-- @@test Two Paragraph
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blockTwoParagraphSmoke : IO Bool
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blockTwoParagraphSmoke =
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let input = "Hello World\n\nHello Again"
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ref = [
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Paragraph (inlineFromString' "Hello World")
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, Paragraph (inlineFromString' "Hello Again")
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]
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in golden input ref blocks
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-- @@test Level 1 heading
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blockLevelOneHeadingSmoke : IO Bool
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blockLevelOneHeadingSmoke =
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let input = "# Level 1"
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ref = [
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Heading 1 (inlineFromString' "Level 1")
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]
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in golden input ref blocks
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-- @@test Level 2 heading
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blockLevelTwoHeadingSmoke : IO Bool
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blockLevelTwoHeadingSmoke =
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let input = "## Level 2"
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ref = [
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Heading 2 (inlineFromString' "Level 2")
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]
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in golden input ref blocks
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-- @@test Multiline prefixed headings
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blockMultilinePrefixed : IO Bool
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blockMultilinePrefixed =
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let input = "# Level 1\n# More text"
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ref = [
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Heading 1 (Text "Level 1" ::: [SoftLineBreak, Text "More text"])
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]
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in golden input ref blocks
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-- @@test Multiline unprefixed headings
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blockMultilineUnprefixed : IO Bool
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blockMultilineUnprefixed =
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let input = "# Level 1\nMore text"
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ref = [
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Heading 1 (Text "Level 1" ::: [SoftLineBreak, Text "More text"])
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]
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in golden input ref blocks
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-- @@test Single Line Blockquote
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blockSingleLineBlockquote : IO Bool
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blockSingleLineBlockquote =
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let input = "> Blockquote"
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ref = [
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BlockQuote ( Paragraph (inlineFromString' "Blockquote") ::: [])
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]
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in golden input ref blocks
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@ -1,161 +0,0 @@
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module SSG.Djot.Common
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import SSG.Parser.Core
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import SSG.Parser.Util
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import Control.Eff
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--*****************************************
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--* Character Classes and String Escaping *
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--*****************************************
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-----------------------
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-- Character classes --
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-----------------------
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-- Class contents
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export
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punctuationChars : List Char
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punctuationChars =
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[
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'!', '"', '#', '$', '%', '&', '\''
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, '(' , ')' , '*' , '+' , ',' , '-'
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, '.' , '/' , ':' , ';' , '<' , '='
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, '>' , '?' , '@' , '[' , ']' , '^'
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, '_' , '`' , '{' , '|' , '}' , '~'
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]
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export
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horizontalWhitespaceChars : List Char
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horizontalWhitespaceChars =
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[' ', '\t']
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export
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verticalWhitespaceChars : List Char
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verticalWhitespaceChars =
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['\n', '\r']
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-- Class parsers
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export
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punctuation : PS Char
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punctuation = theseChars punctuationChars
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--------------
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-- Escaping --
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--------------
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export
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escapedChar : PS Char
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escapedChar = do
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_ <- thisString "\\"
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oneOfE "Expected an escapable code"
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[ punctuation
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, exactReplace "n" '\n'
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, exactReplace "t" '\t'
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, exactReplace "r" '\r'
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]
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------------------------------------
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-- Line Qualifying And Whitespace --
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------------------------------------
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export
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space : PS Char
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space = theseChars horizontalWhitespaceChars
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export
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spaces : PS Nat
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spaces = do
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xs <- many space
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pure $ length xs
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export
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nonTerminal : PS Char
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nonTerminal = notTheseChars verticalWhitespaceChars
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export
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lineEnding : PS String
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lineEnding = theseStrings ["\r\n", "\n", "\r"]
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export
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terminal : PS ()
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terminal = do
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Nothing <- tryMaybe lineEnding
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| _ => pure ()
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test <- parseEoF
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case test of
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False => throw "Expected line terminal"
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True => pure ()
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export
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line : PS (List Char)
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line = do
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False <- parseEoF
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| True => throw "Already at EoF"
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cs <- many nonTerminal
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terminal
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pure cs
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export
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isHorizontalWhitespace : Char -> Bool
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isHorizontalWhitespace c = any (== c) horizontalWhitespaceChars
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export
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blankLine : PS (List Char)
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blankLine = do
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cs <- line
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case all isHorizontalWhitespace cs of
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False => throw "nonblank line"
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True => pure cs
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export
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nonBlankLine : PS (List Char)
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nonBlankLine = do
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cs <- line
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case all isHorizontalWhitespace cs of
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True => throw "blank line"
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False => pure cs
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export
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blankLineOrEnd : PS ()
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blankLineOrEnd = do
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Nothing <- tryMaybe blankLine
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| Just _ => pure ()
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eof <- parseEoF
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case eof of
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False => throw "Expected newline or end of document"
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True => pure ()
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export
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blankLines : PS ()
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blankLines = do
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xs <- many blankLine
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if length xs > 0
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then pure ()
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else blankLineOrEnd
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--*****************************************
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--* Unit Tests *
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--*****************************************
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-------------------------------
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-- Testing Utility Functions --
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-------------------------------
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-- Test a parser against a golden value with the supplied input
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export
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golden : Show a => Eq a =>
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(input : String) -> (reference : a) -> (parser : PS a) -> IO Bool
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golden input ref parser = do
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putStrLn "Input: \{input}"
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putStrLn "Expected: \{show ref}"
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let got = runPS parser input
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case got of
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Left err => do
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putStrLn "Failed with error: \{err}"
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pure False
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Right x => do
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putStrLn "Output: \{show x}"
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pure $ x == ref
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@ -1,226 +0,0 @@
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module SSG.Djot.Inline
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import SSG.Parser.Core
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import SSG.Parser.Util
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|
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import SSG.Djot.Common
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|
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import Control.Eff
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import Control.Monad.Eval
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import Derive.Prelude
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import Derive.Pretty
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|
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-- For iutils unit tests
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import System
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|
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%language ElabReflection
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|
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--******************
|
||||
--* Data Types *
|
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--******************
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|
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public export
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data Inline : Type where
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HardLineBreak : Inline
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SoftLineBreak : Inline
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NonBreakingSpace : Inline
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Text : (c : String) -> Inline
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%runElab derive "Inline" [Show, Eq, Pretty]
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|
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--******************
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--* PostProcessing *
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--******************
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-- Combine adjacent `Text`s in the parsed output
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combineTexts : List1 Inline -> Eval (List1 Inline)
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combineTexts (Text c ::: (Text d :: xs)) =
|
||||
combineTexts (Text (c ++ d) ::: xs)
|
||||
combineTexts (x ::: tail) = do
|
||||
rest <- combineTexts' tail
|
||||
pure $ x ::: rest
|
||||
where
|
||||
combineTexts' : List Inline -> Eval (List Inline)
|
||||
combineTexts' [] = pure []
|
||||
combineTexts' (y :: []) = pure [y]
|
||||
combineTexts' (Text c :: (Text d :: xs)) =
|
||||
combineTexts' (Text (c ++ d) :: xs)
|
||||
combineTexts' (y :: ys) = do
|
||||
rest <- combineTexts' ys
|
||||
pure $ y :: rest
|
||||
|
||||
-- Combine adjacent soft line breaks into one
|
||||
combineSoftBreaks : List1 Inline -> Eval (List1 Inline)
|
||||
combineSoftBreaks (SoftLineBreak ::: (SoftLineBreak :: xs)) =
|
||||
combineSoftBreaks (SoftLineBreak ::: xs)
|
||||
combineSoftBreaks (head ::: tail) = do
|
||||
tail <- combineSoftBreaks' tail
|
||||
pure $ head ::: tail
|
||||
where
|
||||
combineSoftBreaks' : List Inline -> Eval (List Inline)
|
||||
combineSoftBreaks' [] = pure []
|
||||
combineSoftBreaks' (x :: []) = pure [x]
|
||||
combineSoftBreaks' (SoftLineBreak :: (SoftLineBreak :: xs)) =
|
||||
combineSoftBreaks' (SoftLineBreak :: xs)
|
||||
combineSoftBreaks' (x :: xs) = do
|
||||
rest <- combineSoftBreaks' xs
|
||||
pure $ x :: rest
|
||||
|
||||
-- Remove a trailing soft line break from a list of inlines
|
||||
removeTrailingSoftBreak : List1 Inline -> Eval (List1 Inline)
|
||||
removeTrailingSoftBreak (head ::: tail) = do
|
||||
tail <- inner tail
|
||||
pure $ head ::: tail
|
||||
where
|
||||
inner : List Inline -> Eval (List Inline)
|
||||
inner [] = pure []
|
||||
inner (SoftLineBreak :: []) = pure []
|
||||
inner (x :: xs) = do
|
||||
xs <- inner xs
|
||||
pure $ x :: xs
|
||||
|
||||
-- Combine all post processing steps
|
||||
postProcess : List1 Inline -> List1 Inline
|
||||
postProcess xs = eval $ do
|
||||
xs <- combineTexts xs
|
||||
xs <- combineSoftBreaks xs
|
||||
xs <- removeTrailingSoftBreak xs
|
||||
pure xs
|
||||
|
||||
--******************
|
||||
--* Syntax *
|
||||
--******************
|
||||
|
||||
------------------------
|
||||
-- Escaped Whitespace --
|
||||
------------------------
|
||||
|
||||
hardLineBreak : PS Inline
|
||||
hardLineBreak = do
|
||||
_ <- thisString "\\"
|
||||
_ <- spaces
|
||||
_ <- lineEnding
|
||||
pure $ HardLineBreak
|
||||
|
||||
nbsp : PS Inline
|
||||
nbsp = do
|
||||
_ <- thisString "\\ "
|
||||
pure $ NonBreakingSpace
|
||||
|
||||
softLineBreak : PS Inline
|
||||
softLineBreak = do
|
||||
-- Slurp up any horizontal whitespace before the line break
|
||||
_ <- spaces
|
||||
_ <- lineEnding
|
||||
-- Check to see if the next line is empty, if it is, we are at the end of the inline
|
||||
-- content, go ahead and bail
|
||||
state <- save
|
||||
Nothing <- tryMaybe blankLine
|
||||
| Just _ => throw "End of inline"
|
||||
load state
|
||||
-- Slurp up any horizontal whitespace after the line break
|
||||
_ <- spaces
|
||||
pure $ SoftLineBreak
|
||||
|
||||
escapedNewLine : PS Inline
|
||||
escapedNewLine = do
|
||||
-- Slurp up any horizontal whitespace before the line break
|
||||
_ <- spaces
|
||||
_ <- thisString "\\n"
|
||||
-- Slurp up any horizontal whitespace after the line break
|
||||
_ <- spaces
|
||||
pure $ SoftLineBreak
|
||||
|
||||
---------------------
|
||||
-- Emphasis/Strong --
|
||||
---------------------
|
||||
|
||||
----------
|
||||
-- Text --
|
||||
----------
|
||||
|
||||
-- Process escape codes before processing as text
|
||||
escapedText : PS Inline
|
||||
escapedText = do
|
||||
c <- escapedChar
|
||||
pure $ Text (singleton c)
|
||||
|
||||
-- Any non-line-ending character can be part of regular text
|
||||
text : PS Inline
|
||||
text = do
|
||||
c <- nonTerminal
|
||||
pure $ Text (singleton c)
|
||||
|
||||
---------------------------
|
||||
-- Overall Inline Parser --
|
||||
---------------------------
|
||||
|
||||
inlineElement : PS Inline
|
||||
inlineElement = oneOfE "" [
|
||||
hardLineBreak
|
||||
, softLineBreak
|
||||
, escapedNewLine
|
||||
, nbsp
|
||||
, escapedText
|
||||
-- Text is last so that anything can superseed it
|
||||
, text
|
||||
]
|
||||
|
||||
export
|
||||
inline : PS (List1 Inline)
|
||||
inline = map postProcess $
|
||||
atLeastOne "Expected Inline Content" inlineElement
|
||||
|
||||
--******************
|
||||
--* Unit Tests *
|
||||
--******************
|
||||
|
||||
-------------------------------
|
||||
-- Testing Utility Functions --
|
||||
-------------------------------
|
||||
|
||||
|
||||
export
|
||||
inlineFromString' : String -> List1 (Inline)
|
||||
inlineFromString' str = Text str ::: []
|
||||
|
||||
export
|
||||
inlineFromString : String -> List (Inline)
|
||||
inlineFromString = forget . inlineFromString'
|
||||
-----------
|
||||
-- Tests --
|
||||
-----------
|
||||
|
||||
-- @@test Plain Text Hello World
|
||||
inlineTextSmoke : IO Bool
|
||||
inlineTextSmoke =
|
||||
let input = "Hello World!" in
|
||||
golden input (inlineFromString input) (map forget inline)
|
||||
|
||||
-- @@test Escaped Text
|
||||
inlineEscapedSmoke : IO Bool
|
||||
inlineEscapedSmoke =
|
||||
let input = "Hello\\n\\*World"
|
||||
ref = [Text "Hello", SoftLineBreak, Text "*World"]
|
||||
in golden input ref (map forget inline)
|
||||
|
||||
-- @@test Hard Line Break
|
||||
inlineHardBreakSmoke : IO Bool
|
||||
inlineHardBreakSmoke =
|
||||
let input = "Hello\\\nWorld"
|
||||
ref = inlineFromString "Hello" ++ [HardLineBreak] ++ inlineFromString "World"
|
||||
in golden input ref (map forget inline)
|
||||
|
||||
-- @@test Soft Line Break
|
||||
inlineSoftBreakSmoke : IO Bool
|
||||
inlineSoftBreakSmoke =
|
||||
let input = "Hello\nWorld"
|
||||
ref = inlineFromString "Hello" ++ [SoftLineBreak] ++ inlineFromString "World"
|
||||
in golden input ref (map forget inline)
|
||||
|
||||
-- @@test Nonbreaking Space
|
||||
inlineNbspSmoke : IO Bool
|
||||
inlineNbspSmoke =
|
||||
let input = "Hello\\ World"
|
||||
ref = inlineFromString "Hello" ++ [NonBreakingSpace] ++ inlineFromString "World"
|
||||
in golden input ref (map forget inline)
|
||||
|
|
@ -1,80 +0,0 @@
|
|||
module SSG.Djot.Render
|
||||
|
||||
import SSG.HTML
|
||||
|
||||
import SSG.Djot.Inline
|
||||
import SSG.Djot.Block
|
||||
|
||||
import Data.String
|
||||
import Data.List1
|
||||
import Data.List
|
||||
|
||||
import Control.Monad.Eval
|
||||
import Structures.Dependent.DList
|
||||
|
||||
-- Maybe because specifically Soft line breaks don't generate any html of their
|
||||
-- own
|
||||
export
|
||||
renderInline : Inline -> Maybe (type : String ** Html type)
|
||||
renderInline HardLineBreak =
|
||||
Just (_ ** Void "br" [])
|
||||
renderInline SoftLineBreak =
|
||||
Nothing
|
||||
renderInline NonBreakingSpace =
|
||||
Just (_ ** Text " ")
|
||||
renderInline (Text c) =
|
||||
Just (_ ** Text c)
|
||||
|
||||
combineTexts : (types : List String ** DList _ Html types)
|
||||
-> Eval (types : List String ** DList _ Html types)
|
||||
combineTexts (_ ** []) = pure (_ ** [])
|
||||
-- We do a little bit of magic insert of whitespace, so we have some special handling for
|
||||
-- nbsps to not insert spaces around them
|
||||
combineTexts (_ ** (Text c :: Text " " :: Text " " :: rest)) =
|
||||
combineTexts (_ ** Text (c ++ " ") :: Text " " :: rest)
|
||||
combineTexts (_ ** (Text c :: Text " " :: Text d :: rest)) =
|
||||
combineTexts (_ ** Text (c ++ " " ++ d) :: rest)
|
||||
combineTexts (_ ** (Text c :: Text " " :: rest)) =
|
||||
combineTexts (_ ** Text (c ++ " ") :: rest)
|
||||
combineTexts (_ ** (Text c :: Text d :: rest)) =
|
||||
combineTexts (_ ** Text (c ++ " " ++ d) :: rest)
|
||||
combineTexts (_ ** (elem :: rest)) = do
|
||||
(_ ** rest) <- combineTexts (_ ** rest)
|
||||
pure $ (_ ** elem :: rest)
|
||||
|
||||
export
|
||||
renderInlines : List Inline -> (types : List String ** DList _ Html types)
|
||||
renderInlines xs =
|
||||
eval . combineTexts . fromList . catMaybes . map renderInline $ xs
|
||||
|
||||
headingLevel : HeaderLevel -> (h : String ** IsNormal h)
|
||||
headingLevel H1 = ("h1" ** IsH1)
|
||||
headingLevel H2 = ("h2" ** IsH2)
|
||||
headingLevel H3 = ("h3" ** IsH3)
|
||||
headingLevel H4 = ("h4" ** IsH4)
|
||||
headingLevel H5 = ("h5" ** IsH5)
|
||||
headingLevel H6 = ("h6" ** IsH6)
|
||||
|
||||
export
|
||||
renderBlock : Block -> (type : String ** Html type)
|
||||
renderBlock (Paragraph contents) =
|
||||
let (_ ** xs) = renderInlines $ forget contents
|
||||
in (_ ** Normal "p" [] xs)
|
||||
renderBlock (Heading level contents) =
|
||||
let (_ ** xs) = renderInlines $ forget contents
|
||||
(level ** _ ) = headingLevel level
|
||||
in (_ ** Normal level [] xs)
|
||||
renderBlock (BlockQuote contents) =
|
||||
let (_ ** contents) = fromList . map renderBlock . forget $ contents
|
||||
in (_ ** Normal "blockquote" [] contents)
|
||||
|
||||
export
|
||||
renderBlocks : List Block -> (types : List String ** DList _ Html types)
|
||||
renderBlocks xs = fromList $ map renderBlock xs
|
||||
|
||||
export
|
||||
renderHtml : List Block -> Html "html"
|
||||
renderHtml xs =
|
||||
let (_ ** xs) = renderBlocks xs
|
||||
in Normal "html" ["lang" =$ "en"]
|
||||
[ Normal "body" [] xs ]
|
||||
|
|
@ -1,192 +0,0 @@
|
|||
module SSG.Parser.Core
|
||||
|
||||
import Data.Vect
|
||||
import Data.String
|
||||
|
||||
import Control.Eff
|
||||
import Derive.Prelude
|
||||
|
||||
%language ElabReflection
|
||||
|
||||
---------------------------
|
||||
-- Internal parser state --
|
||||
---------------------------
|
||||
|
||||
||| The location of a parser within a string
|
||||
public export
|
||||
data ParserLocation : Type where
|
||||
AtPoint : (length : Int) -> (location : Int) -> ParserLocation
|
||||
EndOfInput : (length : Int) -> ParserLocation
|
||||
|
||||
%runElab derive "ParserLocation" [Show]
|
||||
|
||||
namespace ParserLocation
|
||||
export
|
||||
fromString : String -> ParserLocation
|
||||
fromString str =
|
||||
if strLength str > 0
|
||||
then AtPoint (strLength str) 0
|
||||
else EndOfInput 0
|
||||
|
||||
||| The state of a parser
|
||||
public export
|
||||
record ParserState where
|
||||
constructor MkPS
|
||||
input : String
|
||||
location : ParserLocation
|
||||
|
||||
%runElab derive "ParserState" [Show]
|
||||
|
||||
namespace ParserState
|
||||
export
|
||||
fromString : String -> ParserState
|
||||
fromString str = MkPS str (fromString str)
|
||||
|
||||
export
|
||||
toString : ParserState -> String
|
||||
toString (MkPS input (AtPoint length location)) = strSubstr location length input
|
||||
toString (MkPS input (EndOfInput length)) = ""
|
||||
|
||||
|
||||
||| Three way result of parsing
|
||||
public export
|
||||
data ParseResult : Type -> Type where
|
||||
Got : t -> ParseResult t
|
||||
Failed : t -> ParseResult t
|
||||
EoF : ParseResult t
|
||||
|
||||
-----------------
|
||||
-- Effect Type --
|
||||
-----------------
|
||||
|
||||
||| The parser effect
|
||||
export
|
||||
data Parser : Type -> Type where
|
||||
-- Save and load the state
|
||||
Save : Parser ParserState
|
||||
Load : ParserState -> Parser ()
|
||||
-- Peek the next `n` characters, if there are enough, without altering the parser state
|
||||
Peek : (n : Nat) -> Parser (Maybe (Vect n Char))
|
||||
-- Parse a single char, if it satisfies a predicate
|
||||
ParseChar : (predicate : Char -> Bool) -> Parser (ParseResult Char)
|
||||
-- Parse an exact string match
|
||||
ParseExact : (str : String) -> Parser (ParseResult String)
|
||||
-- Skip a run of 0 or more chars all satisfying a predicate
|
||||
SkipChars : (predicate : Char -> Bool) -> Parser ()
|
||||
-- Detect the end of input
|
||||
ParseEoF : Parser Bool
|
||||
|
||||
Show (Parser a) where
|
||||
show Save = "save"
|
||||
show (Load x) = "load: \{show x}"
|
||||
show (Peek n) = "peek: \{show n}]"
|
||||
show (ParseChar predicate) = "ParseChar"
|
||||
show (ParseExact str) = "ParseExact: \{str}"
|
||||
show (SkipChars predicate) = "SkipChars"
|
||||
show ParseEoF = "ParseEof"
|
||||
|
||||
-----------------------
|
||||
-- Effectful Actions --
|
||||
-----------------------
|
||||
|
||||
||| Aquire a copy of the current parser state
|
||||
|||
|
||||
||| Intended to be used for backtracking
|
||||
export
|
||||
save : Has Parser fs => Eff fs ParserState
|
||||
save = send Save
|
||||
|
||||
||| Restore the parser state to a previousy persisted copy
|
||||
export
|
||||
load : Has Parser fs => ParserState -> Eff fs ()
|
||||
load x = send $ Load x
|
||||
|
||||
||| Look ahead exactly `n` characters
|
||||
export
|
||||
peek : Has Parser fs => (n : Nat) -> Eff fs (Maybe (Vect n Char))
|
||||
peek n = send $ Peek n
|
||||
|
||||
||| Attempt to parse a single char satisfying the given predicate, leaving the parser
|
||||
||| state unchanged on failure
|
||||
export
|
||||
parseChar : Has Parser fs => (predicate : Char -> Bool) -> Eff fs (ParseResult Char)
|
||||
parseChar predicate = send $ ParseChar predicate
|
||||
|
||||
||| Parse an exact match of the given string
|
||||
export
|
||||
parseExact : Has Parser fs => (str : String) -> Eff fs (ParseResult String)
|
||||
parseExact str = send $ ParseExact str
|
||||
|
||||
||| Skip a run of any number of characters satisfying the given predicate
|
||||
export
|
||||
skipChars : Has Parser fs => (predicate : Char -> Bool) -> Eff fs ()
|
||||
skipChars predicate = send $ SkipChars predicate
|
||||
|
||||
||| Detect EoF
|
||||
export
|
||||
parseEoF : Has Parser fs => Eff fs Bool
|
||||
parseEoF = send ParseEoF
|
||||
|
||||
--------------------
|
||||
-- Effect handler --
|
||||
--------------------
|
||||
|
||||
export
|
||||
unParser : ParserState -> Parser a -> (a, ParserState)
|
||||
-- Save the parser state
|
||||
unParser s Save =
|
||||
(s, s)
|
||||
-- Load a provided parser state
|
||||
unParser s (Load x) =
|
||||
((), x)
|
||||
-- Look ahead exactly `n` characters
|
||||
unParser s@(MkPS input (AtPoint length location)) (Peek n) =
|
||||
let cs = unpack . strSubstr location (cast n) $ input
|
||||
in (toVect n cs, s)
|
||||
unParser s@(MkPS input (EndOfInput length)) (Peek n) =
|
||||
(Nothing, s)
|
||||
-- Attempt to parse a single character matching a given predicate, bail out without
|
||||
-- affecting the parser state otherwise
|
||||
unParser s@(MkPS input (AtPoint length location)) (ParseChar predicate) =
|
||||
-- Saftey: We maintain location < length as a type invariant
|
||||
let c = assert_total $ strIndex input location
|
||||
in if predicate c
|
||||
then if location + 1 < length
|
||||
then (Got c, MkPS input (AtPoint length (location + 1)))
|
||||
else (Got c, MkPS input (EndOfInput length))
|
||||
else (Failed c, s)
|
||||
unParser s@(MkPS input (EndOfInput length)) (ParseChar predicate) =
|
||||
(EoF, s)
|
||||
-- Parse an exact string match
|
||||
unParser s@(MkPS input (AtPoint length location)) (ParseExact str) =
|
||||
let substr = strSubstr location (strLength str) input
|
||||
in if substr == str
|
||||
then if location + (strLength str) < length
|
||||
then (Got substr, MkPS input (AtPoint length (location + strLength str)))
|
||||
else (Got substr, MkPS input (EndOfInput length))
|
||||
else (Failed substr, s)
|
||||
unParser s@(MkPS input (EndOfInput length)) (ParseExact str) = (EoF, s)
|
||||
-- Skip any number of chars satisfying a given predicate
|
||||
unParser s@(MkPS input (AtPoint length location)) (SkipChars predicate) =
|
||||
case unParser s (ParseChar predicate) of
|
||||
(Got _, s) => unParser s (SkipChars predicate)
|
||||
(_, s) => ((), s)
|
||||
unParser s@(MkPS input (EndOfInput length)) (SkipChars predicate) =
|
||||
((), s)
|
||||
-- "Parse" the end of input
|
||||
unParser s@(MkPS input (AtPoint length location)) ParseEoF = (False, s)
|
||||
unParser s@(MkPS input (EndOfInput length)) ParseEoF = (True, s)
|
||||
|
||||
export
|
||||
runParser' : Has Parser fs =>
|
||||
(s : ParserState) -> Eff fs t -> Eff (fs - Parser) (t, ParserState)
|
||||
runParser' s =
|
||||
handleRelayS s (\state, t => pure (t, state)) $ \s2, ps, f =>
|
||||
let (a, st) = unParser s2 ps
|
||||
in f st a
|
||||
|
||||
export
|
||||
runParser : Has Parser fs =>
|
||||
(s : String) -> Eff fs t -> Eff (fs - Parser) (t, String)
|
||||
runParser s x =
|
||||
map (\(x,y) => (x, toString y)) $ runParser' (fromString s) x
|
||||
|
|
@ -1,148 +0,0 @@
|
|||
module SSG.Parser.Util
|
||||
|
||||
import SSG.Parser.Core
|
||||
|
||||
import Data.List1
|
||||
import Data.Vect
|
||||
import Data.String
|
||||
import Control.Eff
|
||||
|
||||
||| Type alias for parsing errors
|
||||
public export
|
||||
ParseError : Type
|
||||
ParseError = String
|
||||
|
||||
||| Type alias for a parser equipped with exception handling
|
||||
public export
|
||||
PS : Type -> Type
|
||||
PS a = Eff [Parser, Except ParseError] a
|
||||
|
||||
||| Run a parser and extact the parsed value
|
||||
export
|
||||
runPS : PS a -> (str : String) -> Either String a
|
||||
runPS x str =
|
||||
fst . extract . runParser str . runExcept $ x
|
||||
|
||||
||| Run a parser, extracting the parsed value, and throwing an error if the parse was not
|
||||
||| complete or if it failed
|
||||
export
|
||||
runPS' : PS a -> (str : String) -> PS a
|
||||
runPS' x str = do
|
||||
(res, rest) <- lift . runParser str . runExcept $ x
|
||||
unless (null rest) $ throw "Incomplete parse"
|
||||
rethrow res
|
||||
|
||||
||| Attempt to run a fallible parser, backtracking on failure
|
||||
export
|
||||
try : (f : PS a) -> (err : ParseError -> PS a) -> PS a
|
||||
try f err = do
|
||||
state <- save
|
||||
result <- lift . runExcept $ f
|
||||
case result of
|
||||
Left e => do
|
||||
load state
|
||||
err e
|
||||
Right result => pure result
|
||||
|
||||
||| Variant of `try` that wraps the result in a `Maybe`
|
||||
export
|
||||
tryMaybe : (f : PS a) -> PS (Maybe a)
|
||||
tryMaybe f = try (map Just f) (\_ => pure Nothing)
|
||||
|
||||
||| Variant of `try` that wraps the result in an `Either`
|
||||
export
|
||||
tryEither : (f : PS a) -> PS (Either ParseError a)
|
||||
tryEither f = try (map Right f) (\e => pure $ Left e)
|
||||
|
||||
||| Attempt to parse each of a list of parsers, returning the first that
|
||||
||| succeeds
|
||||
export
|
||||
oneOfE : (err : ParseError) -> List (PS a) -> PS a
|
||||
oneOfE err [] = throw err
|
||||
oneOfE err (x :: xs) = do
|
||||
res <- tryMaybe x
|
||||
case res of
|
||||
Nothing => oneOfE err xs
|
||||
Just y => pure y
|
||||
|
||||
||| Attempt to parse 0+ of a thing
|
||||
export
|
||||
many : (f : PS a) -> PS (List a)
|
||||
many f = do
|
||||
Just next <- tryMaybe f
|
||||
| _ => pure []
|
||||
map (next ::) (many f)
|
||||
|
||||
||| Attempt to parse at least one of a thing, giving the supplied error on
|
||||
||| failure
|
||||
export
|
||||
atLeastOne : (err : ParseError) -> (f : PS a) -> PS (List1 a)
|
||||
atLeastOne err f = do
|
||||
Just head <- tryMaybe f
|
||||
| _ => throw err
|
||||
tail <- many f
|
||||
pure $ head ::: tail
|
||||
|
||||
||| Attempt to parse an exact string
|
||||
export
|
||||
thisString : String -> PS String
|
||||
thisString str = do
|
||||
res <- parseExact str
|
||||
case res of
|
||||
Got x => pure x
|
||||
Failed x => throw "Expected \{show str} Got \{show x}"
|
||||
EoF => throw "Unexpected EoF"
|
||||
|
||||
||| Attempt to parse one of a list of strings
|
||||
export
|
||||
theseStrings : List String -> PS String
|
||||
theseStrings strs = theseStrings' strs
|
||||
where
|
||||
theseStrings' : List String -> PS String
|
||||
theseStrings' [] = throw "Expected one of \{show strs}"
|
||||
theseStrings' (x :: xs) = do
|
||||
res <- parseExact x
|
||||
case res of
|
||||
Got y => pure y
|
||||
_ => theseStrings' xs
|
||||
|
||||
||| Attempt to parse one of a list of chars
|
||||
export
|
||||
theseChars : List Char -> PS Char
|
||||
theseChars cs = do
|
||||
Just [next] <- peek 1
|
||||
| _ => throw "Unexpected EoF"
|
||||
if any (== next) cs
|
||||
then do
|
||||
_ <- parseChar (const True)
|
||||
pure next
|
||||
else throw "Expected one of \{show cs}, got \{show next}"
|
||||
|
||||
||| Attempt to parse any char not in the list
|
||||
export
|
||||
notTheseChars : List Char -> PS Char
|
||||
notTheseChars cs = do
|
||||
Just [next] <- peek 1
|
||||
| _ => throw "Unexpected EoF"
|
||||
if any (== next) cs
|
||||
then throw "Expected not one of \{show cs}, got \{show next}"
|
||||
else do
|
||||
_ <- parseChar (const True)
|
||||
pure next
|
||||
|
||||
||| Parse an exact match, but 'replace' it with the provided value
|
||||
export
|
||||
exactReplace : (str : String) -> (replacement : a) -> PS a
|
||||
exactReplace str replacement = do
|
||||
_ <- parseExact str
|
||||
pure replacement
|
||||
|
||||
||| Any character
|
||||
export
|
||||
any : PS Char
|
||||
any = do
|
||||
x <- parseChar (const True)
|
||||
case x of
|
||||
Got y => pure y
|
||||
(Failed y) => throw "What?"
|
||||
EoF => throw "Unexpected EoF"
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
module Main
|
||||
|
||||
import SSG.Djot
|
||||
import SSG.HTML
|
||||
|
||||
import System
|
||||
import System.File
|
||||
|
||||
main : IO ()
|
||||
main = do
|
||||
Right contents <- readFile "test.dj"
|
||||
| Left err => do
|
||||
printLn err
|
||||
exitFailure
|
||||
let parsed = djot contents
|
||||
putStr . render . renderHtml $ parsed
|
||||
|
|
@ -1,26 +0,0 @@
|
|||
<!DOCTYPE HTML>
|
||||
<html lang=en>
|
||||
<body>
|
||||
<p>A paragraph with a normal newline in the middle of it</p>
|
||||
<p>
|
||||
A paragraph with a hard line break
|
||||
<br>
|
||||
in the middle of it
|
||||
</p>
|
||||
<p>
|
||||
A paragraph with a hard line break
|
||||
<br>
|
||||
in the middle of it with extra spaces
|
||||
</p>
|
||||
<p>
|
||||
A paragraph with a hard line break
|
||||
<br>
|
||||
in the middle of it with no spaces
|
||||
</p>
|
||||
<p>A paragraph with an explicit soft line break in the middle of it</p>
|
||||
<p>Multiple soft breaks should coalesce into one</p>
|
||||
<p>Same should apply when mixing explicit and implied soft breaks</p>
|
||||
<p>An escaped space should render as a nonbreaking space</p>
|
||||
<p>We also want to test multiple nonbreaking spaces in a row</p>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
rm -rf build/
|
||||
|
||||
flock "$1" pack -q install-deps test.ipkg
|
||||
pack -q run test.ipkg
|
||||
|
||||
rm -rf build/
|
||||
|
|
@ -1,22 +0,0 @@
|
|||
A paragraph with a normal newline
|
||||
in the middle of it
|
||||
|
||||
A paragraph with a hard line break \
|
||||
in the middle of it
|
||||
|
||||
A paragraph with a hard line break \
|
||||
in the middle of it with extra spaces
|
||||
|
||||
A paragraph with a hard line break \
|
||||
in the middle of it with no spaces
|
||||
|
||||
A paragraph with an explicit soft line break \n in the middle of it
|
||||
|
||||
Multiple soft breaks should coalesce \n\n\n into one
|
||||
|
||||
Same should apply when mixing explicit \n
|
||||
and implied soft breaks
|
||||
|
||||
An escaped space\ should render as a nonbreaking space
|
||||
|
||||
We also want to test\ \ multiple\ \ \ nonbreaking\ \ \ \ spaces\ \ \ \ \ in a row
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
package a-test
|
||||
|
||||
depends = SSG
|
||||
|
||||
main = Main
|
||||
|
||||
executable = test
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
module Main
|
||||
|
||||
import SSG.Djot
|
||||
import SSG.HTML
|
||||
|
||||
import System
|
||||
import System.File
|
||||
|
||||
main : IO ()
|
||||
main = do
|
||||
Right contents <- readFile "test.dj"
|
||||
| Left err => do
|
||||
printLn err
|
||||
exitFailure
|
||||
let parsed = djot contents
|
||||
putStr . render . renderHtml $ parsed
|
||||
|
|
@ -1,29 +0,0 @@
|
|||
<!DOCTYPE HTML>
|
||||
<html lang=en>
|
||||
<body>
|
||||
<h1>Level 1 Heading</h1>
|
||||
<h2>Level 2 Heading</h2>
|
||||
<h3>Level 3 Heading</h3>
|
||||
<h4>Level 4 Heading</h4>
|
||||
<h5>Level 5 Heading</h5>
|
||||
<h6>Level 6 Heading</h6>
|
||||
<p>####### Level 7 Not a Heading</p>
|
||||
<p># A heading that spans multiple lines</p>
|
||||
<p># Heading</p>
|
||||
<p>Some content</p>
|
||||
<p>## A sub heading</p>
|
||||
<p>Even more content</p>
|
||||
<p># Back up</p>
|
||||
<p>Some final content</p>
|
||||
<h1>A Multiline Heading</h1>
|
||||
<p>## A Level 2 ## Multiline Heading</p>
|
||||
<h2>Heading</h2>
|
||||
<p>### Not a heading</p>
|
||||
<h3>Heading</h3>
|
||||
<h2>Not a heading</h2>
|
||||
<h1>A Multiline Heading</h1>
|
||||
<h2>A Level 2 Multiline Heading</h2>
|
||||
<h1>A Multiline Heading</h1>
|
||||
<h2>A Level 2 Multiline Heading</h2>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
rm -rf build/
|
||||
|
||||
flock "$1" pack -q install-deps test.ipkg
|
||||
pack -q run test.ipkg
|
||||
|
||||
rm -rf build/
|
||||
|
|
@ -1,52 +0,0 @@
|
|||
# Level 1 Heading
|
||||
|
||||
## Level 2 Heading
|
||||
|
||||
### Level 3 Heading
|
||||
|
||||
#### Level 4 Heading
|
||||
|
||||
##### Level 5 Heading
|
||||
|
||||
###### Level 6 Heading
|
||||
|
||||
####### Level 7 Not a Heading
|
||||
|
||||
# A heading that
|
||||
spans multiple lines
|
||||
|
||||
# Heading
|
||||
|
||||
Some content
|
||||
|
||||
## A sub heading
|
||||
|
||||
Even more content
|
||||
|
||||
# Back up
|
||||
|
||||
Some final content
|
||||
|
||||
# A Multiline
|
||||
# Heading
|
||||
|
||||
## A Level 2
|
||||
## Multiline Heading
|
||||
|
||||
## Heading
|
||||
### Not a heading
|
||||
|
||||
### Heading
|
||||
## Not a heading
|
||||
|
||||
# A Multiline
|
||||
Heading
|
||||
|
||||
## A Level 2
|
||||
Multiline Heading
|
||||
|
||||
# A Multiline
|
||||
Heading
|
||||
|
||||
## A Level 2
|
||||
Multiline Heading
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
package a-test
|
||||
|
||||
depends = SSG
|
||||
|
||||
main = Main
|
||||
|
||||
executable = test
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
module Main
|
||||
|
||||
import SSG.Djot
|
||||
import SSG.HTML
|
||||
|
||||
import System
|
||||
import System.File
|
||||
|
||||
main : IO ()
|
||||
main = do
|
||||
Right contents <- readFile "test.dj"
|
||||
| Left err => do
|
||||
printLn err
|
||||
exitFailure
|
||||
let parsed = djot contents
|
||||
putStr . render . renderHtml $ parsed
|
||||
|
|
@ -1,22 +0,0 @@
|
|||
<!DOCTYPE HTML>
|
||||
<html lang=en>
|
||||
<body>
|
||||
<blockquote>
|
||||
<p>A single line block quote</p>
|
||||
</blockquote>
|
||||
<blockquote>
|
||||
<p>This is a multi-line blockquote With no linebreaks</p>
|
||||
</blockquote>
|
||||
<blockquote>
|
||||
<p>This is a multi-line block quote with</p>
|
||||
<p>A line break</p>
|
||||
</blockquote>
|
||||
<blockquote>
|
||||
<p>
|
||||
This is a block quote with a
|
||||
<br>
|
||||
hard break in it
|
||||
</p>
|
||||
</blockquote>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
rm -rf build/
|
||||
|
||||
flock "$1" pack -q install-deps test.ipkg
|
||||
pack -q run test.ipkg
|
||||
|
||||
rm -rf build/
|
||||
|
|
@ -1,11 +0,0 @@
|
|||
> A single line block quote
|
||||
|
||||
> This is a multi-line blockquote
|
||||
> With no linebreaks
|
||||
|
||||
> This is a multi-line block quote with
|
||||
>
|
||||
> A line break
|
||||
|
||||
> This is a block quote with a \
|
||||
> hard break in it
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
package a-test
|
||||
|
||||
depends = SSG
|
||||
|
||||
main = Main
|
||||
|
||||
executable = test
|
||||
Loading…
Add table
Reference in a new issue