X-Git-Url: http://git.megacz.com/?p=coq-hetmet.git;a=blobdiff_plain;f=examples%2FGArrowTikZ.hs;h=9961830274f6dfa4eca1fa2d362188de55cc8304;hp=1f629690079201bf2756d8d3b6b66af5380ad8ea;hb=c07fa5072abe97b2a458a16cdae4299eef07746b;hpb=ff46afb5b5a682dd9f2e246afb889bb2f1be9f15 diff --git a/examples/GArrowTikZ.hs b/examples/GArrowTikZ.hs index 1f62969..9961830 100644 --- a/examples/GArrowTikZ.hs +++ b/examples/GArrowTikZ.hs @@ -1,36 +1,469 @@ -{-# OPTIONS_GHC -XModalTypes -XMultiParamTypeClasses -ddump-types -XNoMonoPatBinds #-} -module GArrowTikZ +{-# LANGUAGE RankNTypes, MultiParamTypeClasses, GADTs, FlexibleContexts, FlexibleInstances, TypeOperators #-} +----------------------------------------------------------------------------- +-- | +-- Module : GArrowTikZ +-- Copyright : none +-- License : public domain +-- +-- Maintainer : Adam Megacz +-- Stability : experimental +-- +-- | Renders a @GArrowSkeleton@ using TikZ; the result is LaTeX code. +-- You must have lp_solve installed in order for this to work. +-- + +module GArrowTikZ (tikz) where -import Prelude hiding ( id, (.) ) +import System.Process +import Prelude hiding ( id, (.), lookup ) +import Control.Category +import Control.Monad.State +import GHC.HetMet.GArrow +import Data.List hiding (lookup, insert) +import Data.Map hiding (map, (!)) +import Data.Maybe (catMaybes) +import Unify +import GArrowSkeleton +import GArrowPortShape +import GHC.HetMet.Private + +------------------------------------------------------------------------------ +-- Tracks -- --- Render a fully-polymorphic GArrow term as a boxes-and-wires diagram using TikZ +-- Figuring out the x-coordinates of the boxes is easy, but we'll need +-- to use lp_solve to get a nice layout for the y-coordinates of the +-- wires. A @Track@ is basically just a y-axis position for one of +-- the horizontal wires in the boxes-and-wires diagram; we will assign +-- a unique Int to each visual element that has a y-coordinate, then +-- generate a big pile of constraints on these y-coordinates and have +-- lp_solve find a solution. -- +type TrackIdentifier = Int + +data Tracks = T TrackIdentifier + | TU TrackIdentifier -- a track known to be of unit type + | TT Tracks Tracks + +instance Show Tracks where + show (T ti ) = "(T "++show ti++")" + show (TU ti ) = "(TU "++show ti++")" + show (TT t1 t2) = "(TT "++show t1++" "++show t2++")" + +-- +-- | TrackPositions maps TrackIdentifiers to actual y-axis positions; +-- this is what lp_solve gives us +-- +type TrackPositions = TrackIdentifier -> Float + +(!) :: TrackPositions -> TrackIdentifier -> Float +tp ! ti = tp ti + +-- | get the uppermost TrackIdentifier in a Tracks +uppermost (T x) = x +uppermost (TU x) = x +uppermost (TT x y) = uppermost x + +-- | get the lowermost TrackIdentifier in a Tracks +lowermost (T x) = x +lowermost (TU x) = x +lowermost (TT x y) = lowermost y + + + + +------------------------------------------------------------------------------ +-- Diagrams + +-- | A Diagram is the visual representation of a GArrowSkeleton +data Diagram + = DiagramComp Diagram Diagram + | DiagramBox TrackIdentifier Tracks BoxRenderer Tracks TrackIdentifier + | DiagramBypassTop Tracks Diagram + | DiagramBypassBot Diagram Tracks + -- | DiagramLoopTop Tracks Diagram + -- | DiagramLoopBot Diagram Tracks + +-- | get the output tracks of a diagram +getOut :: Diagram -> Tracks +getOut (DiagramComp f g) = getOut g +getOut (DiagramBox ptop pin q pout pbot) = pout +getOut (DiagramBypassTop p f) = TT p (getOut f) +getOut (DiagramBypassBot f p) = TT (getOut f) p + +-- | get the input tracks of a diagram +getIn :: Diagram -> Tracks +getIn (DiagramComp f g) = getIn f +getIn (DiagramBox ptop pin q pout pbot) = pin +getIn (DiagramBypassTop p f) = TT p (getIn f) +getIn (DiagramBypassBot f p) = TT (getIn f) p + +-- | A BoxRenderer is just a routine that, given the dimensions of a +-- boxes-and-wires box element, knows how to spit out a bunch of TikZ +-- code that draws it +type BoxRenderer = + TrackPositions -> -- resolves the TrackIdentifiers to actual y-coordinates + Float -> -- x1 + Float -> -- y1 + Float -> -- x2 + Float -> -- y2 + String -- TikZ code + + + + + + +------------------------------------------------------------------------------ +-- Constraints + +-- | a constraint (to be dealt with by lp_solve) relates two track identifiers +data Constraint = C TrackIdentifier Ordering TrackIdentifier {- plus -} Float + | EqualSpace TrackIdentifier TrackIdentifier TrackIdentifier TrackIdentifier + +-- instance Show Constraint where +-- show (C t1 LT t2 k s) = "x"++(show t1)++" = x"++(show t2)++" + "++(show k) ++ ";\n" +-- show (C t1 GT t2 k s) = "x"++(show t1)++" = x"++(show t2)++" + "++(show k) ++ ";\n" +-- show (C t1 EQ t2 k s) = "x"++(show t1)++" = x"++(show t2)++" + "++(show k) ++ ";\n" + +instance Show Constraint where + show (C t1 LT t2 k) = "x"++(show t1)++" <= x"++(show t2)++" + "++(show k) ++ ";\n" + show (C t1 GT t2 k) = "x"++(show t1)++" >= x"++(show t2)++" + "++(show k) ++ ";\n" + show (C t1 EQ t2 k) = "x"++(show t1)++" = x"++(show t2)++" + "++(show k) ++ ";\n" + show (EqualSpace t1a t1b t2a t2b) = "x"++(show t1a)++" = x"++(show t1b)++ + " + x"++(show t2a)++" - x"++(show t2b)++ ";\n" + +-- | a monad to accumulate constraints and track the largest TrackIdentifier allocated +type ConstraintM a = State (TrackIdentifier,[Constraint]) a + +-- | pull the constraints out of the monad +getConstraints :: ConstraintM [Constraint] +getConstraints = do { (_,c) <- get ; return c } + +-- | add a constraint +constrain :: TrackIdentifier -> Ordering -> TrackIdentifier {- plus -} -> Float -> ConstraintM () +constrain t1 ord t2 k = do { (t,c) <- get + ; put (t, (C t1 ord t2 k):c) + ; return () + } + +constrainEqualSpace t1a t1b t2a t2b = do { (t,c) <- get + ; put (t, (EqualSpace t1a t1b t2a t2b):c) + ; return () + } + +-- | simple form for equality constraints +constrainEq (TT t1a t1b) (TT t2a t2b) = do { constrainEq t1a t2a ; constrainEq t1b t2b ; return () } +constrainEq (T t1 ) (T t2 ) = constrain t1 EQ t2 0 +constrainEq (TU t1 ) (TU t2 ) = constrain t1 EQ t2 0 +constrainEq (TU t1 ) (T t2 ) = constrain t1 EQ t2 0 +constrainEq (T t1 ) (TU t2 ) = constrain t1 EQ t2 0 +constrainEq t1 t2 = error $ "constrainEq mismatch: " ++ show t1 ++ " and " ++ show t2 + +-- | allocate a TrackIdentifier +alloc1 :: ConstraintM Tracks +alloc1 = do { (t,c) <- get + ; put (t+1,c) + ; return (T t) + } + + +mkdiag :: GArrowPortShape m () a b -> ConstraintM Diagram +mkdiag (GASPortPassthrough inp outp m) = error "not supported" +mkdiag (GASPortShapeWrapper inp outp x) = mkdiag' x + where + mkdiag' :: GArrowSkeleton (GArrowPortShape m ()) a b -> ConstraintM Diagram + + mkdiag' (GAS_comp f g) = do { f' <- mkdiag' f; g' <- mkdiag' g + ; constrainEq (getOut f') (getIn g') ; return $ DiagramComp f' g' } + mkdiag' (GAS_first f) = do { (top,(TT _ x),bot) <- alloc inp; f' <- mkdiag' f ; constrainBot f' 1 (uppermost x) + ; return $ DiagramBypassBot f' x } + mkdiag' (GAS_second f) = do { (top,(TT x _),bot) <- alloc inp; f' <- mkdiag' f ; constrainTop (lowermost x) 1 f' + ; return $ DiagramBypassTop x f' } + mkdiag' (GAS_id ) = do { (top, x ,bot) <- alloc inp ; simpleDiag "id" top x x bot [(x,x)] } + mkdiag' GAS_cancell = do { (top,(TT x y),bot) <- alloc inp + ; let r tp x1 y1 x2 y2 = drawBox x1 y1 x2 y2 "gray!50" "cancell" ++ + drawWires tp x1 y x2 y "black" ++ + drawLine x1 (tp!lowermost x) ((x1+x2)/2) (tp!uppermost y) "black" "dashed" + ; return $ DiagramBox top (TT x y) r y bot } + mkdiag' GAS_cancelr = do { (top,(TT x y),bot) <- alloc inp + ; let r tp x1 y1 x2 y2 = drawBox x1 y1 x2 y2 "gray!50" "cancelr" ++ + drawWires tp x1 x x2 x "black" ++ + drawLine x1 (tp!uppermost y) ((x1+x2)/2) (tp!lowermost x) "black" "dashed" + ; return $ DiagramBox top (TT x y) r x bot } + mkdiag' GAS_uncancell = do { (top,(TT x y),bot) <- alloc outp + ; let r tp x1 y1 x2 y2 = drawBox x1 y1 x2 y2 "gray!50" "uncancell" ++ + drawWires tp x1 y x2 y "black" ++ + drawLine ((x1+x2)/2) (tp!uppermost y) x2 (tp!lowermost x) "black" "dashed" + ; return $ DiagramBox top y r (TT x y) bot } + mkdiag' GAS_uncancelr = do { (top,(TT x y),bot) <- alloc outp + ; let r tp x1 y1 x2 y2 = drawBox x1 y1 x2 y2 "gray!50" "uncancelr" ++ + drawWires tp x1 x x2 x "black" ++ + drawLine ((x1+x2)/2) (tp!lowermost x) x2 (tp!uppermost y) "black" "dashed" + ; return $ DiagramBox top x r (TT x y) bot } + mkdiag' GAS_drop = do { (top, x ,bot) <- alloc inp ; simpleDiag "drop" top x x bot [] } + mkdiag' (GAS_const i) = do { (top, x ,bot) <- alloc inp + ; (_, y ,_) <- alloc outp + ; constrainEq x y + ; simpleDiag ("const " ++ show i) top x y bot [] } + mkdiag' GAS_copy = do { (top,(TT y z),bot) <- alloc outp + ; (_ , x ,_) <- alloc inp + ; constrainEqualSpace (lowermost y) (uppermost x) (lowermost x) (uppermost z) + ; let r tp x1 y1 x2 y2 = drawBox x1 y1 x2 y2 "gray!50" "copy" ++ + drawWires tp x1 x ((x1+x2)/2) x "black" ++ + drawWires tp ((x1+x2)/2) x x2 y "black" ++ + drawWires tp ((x1+x2)/2) x x2 z "black" + ; return $ DiagramBox top x r (TT y z) bot + } + mkdiag' GAS_merge = do { (top,(TT x y),bot) <- alloc inp + ; simpleDiag "times" top (TT x y) x bot [] } + mkdiag' GAS_swap = do { (top,(TT x y),bot) <- alloc inp + ; (top,(TT x' y'),bot) <- alloc outp + ; constrainEq (T (lowermost x)) (T (lowermost x')) + ; constrainEq (T (uppermost y)) (T (uppermost y')) + ; simpleDiag' "swap" top (TT x y) (TT x' y') bot [(x,y'),(y,x')] "gray!50" } + mkdiag' GAS_assoc = + do { (top,(TT (TT x y) z),bot) <- alloc inp + ; let r tp x1 y1 x2 y2 + = drawBox (x1+0.2*xscale) y1 (x2-0.2*xscale) y2 "white" "assoc" ++ + drawLine x1 y1 x2 y1 "gray!50" "-" ++ + drawLine x1 y2 x2 y2 "gray!50" "-" ++ + drawLine x1 y1 x1 ((tp ! uppermost x) - 0.5) "gray!50" "-"++ + drawLine x1 ((tp ! uppermost x) - 0.5) (x1+0.2) ((tp ! uppermost x) - 0.5) "gray!50" "-"++ + drawLine (x1+0.2) ((tp ! uppermost x) - 0.5) (x1+0.2) ((tp ! lowermost y) + 0.5) "gray!50" "-"++ + drawLine (x1+0.2) ((tp ! lowermost y) + 0.5) x1 ((tp ! lowermost y) + 0.5) "gray!50" "-"++ + drawLine x1 ((tp ! lowermost y) + 0.5) x1 y2 "gray!50" "-"++ + drawLine x2 y2 x2 ((tp ! lowermost z) + 0.5) "gray!50" "-"++ + drawLine x2 ((tp ! lowermost z) + 0.5) (x2-0.2) ((tp ! lowermost z) + 0.5) "gray!50" "-"++ + drawLine (x2-0.2) ((tp ! lowermost z) + 0.5) (x2-0.2) ((tp ! uppermost y) - 0.5) "gray!50" "-"++ + drawLine (x2-0.2) ((tp ! uppermost y) - 0.5) x2 ((tp ! uppermost y) - 0.5) "gray!50" "-"++ + drawLine x2 ((tp ! uppermost y) - 0.5) x2 y1 "gray!50" "-"++ + drawWires tp x1 x x2 x "black" ++ + drawWires tp x1 y x2 y "black" ++ + drawWires tp x1 z x2 z "black" + ; return $ DiagramBox top (TT (TT x y) z) r (TT x (TT y z)) bot + } + mkdiag' GAS_unassoc = + do { (top,(TT x (TT y z)),bot) <- alloc inp + ; let r tp x1 y1 x2 y2 + = drawBox (x1+0.2*xscale) y1 (x2-0.2*xscale) y2 "white" "unassoc" ++ + drawLine x1 y1 x2 y1 "gray!50" "-" ++ + drawLine x1 y2 x2 y2 "gray!50" "-" ++ + drawLine x2 y1 x2 ((tp ! uppermost x) - 0.5) "gray!50" "-"++ + drawLine x2 ((tp ! uppermost x) - 0.5) (x2-0.2) ((tp ! uppermost x) - 0.5) "gray!50" "-"++ + drawLine (x2-0.2) ((tp ! uppermost x) - 0.5) (x2-0.2) ((tp ! lowermost y) + 0.5) "gray!50" "-"++ + drawLine (x2-0.2) ((tp ! lowermost y) + 0.5) x2 ((tp ! lowermost y) + 0.5) "gray!50" "-"++ + drawLine x2 ((tp ! lowermost y) + 0.5) x2 y2 "gray!50" "-"++ + drawLine x1 y2 x1 ((tp ! lowermost z) + 0.5) "gray!50" "-"++ + drawLine x1 ((tp ! lowermost z) + 0.5) (x1+0.2) ((tp ! lowermost z) + 0.5) "gray!50" "-"++ + drawLine (x1+0.2) ((tp ! lowermost z) + 0.5) (x1+0.2) ((tp ! uppermost y) - 0.5) "gray!50" "-"++ + drawLine (x1+0.2) ((tp ! uppermost y) - 0.5) x1 ((tp ! uppermost y) - 0.5) "gray!50" "-"++ + drawLine x1 ((tp ! uppermost y) - 0.5) x1 y1 "gray!50" "-"++ + drawWires tp x1 x x2 x "black" ++ + drawWires tp x1 y x2 y "black" ++ + drawWires tp x1 z x2 z "black" + ; return $ DiagramBox top (TT x (TT y z)) r (TT (TT x y) z) bot + } + mkdiag' (GAS_loopl f) = error "not implemented" + mkdiag' (GAS_loopr f) = error "not implemented" + mkdiag' (GAS_misc f ) = mkdiag f + + diagramBox :: TrackIdentifier -> Tracks -> BoxRenderer -> Tracks -> TrackIdentifier -> ConstraintM Diagram + diagramBox ptop pin r pout pbot = do { constrain ptop LT (uppermost pin) (-1) + ; constrain pbot GT (lowermost pin) 1 + ; constrain ptop LT (uppermost pout) (-1) + ; constrain pbot GT (lowermost pout) 1 + ; constrain ptop LT pbot (-1) + ; return $ DiagramBox ptop pin r pout pbot + } + simpleDiag text ptop pin pout pbot conn = simpleDiag' text ptop pin pout pbot conn "black" + simpleDiag' text ptop pin pout pbot conn color = diagramBox ptop pin defren pout pbot + where + defren tp x1 y1 x2 y2 = drawBox x1 y1 x2 y2 color text ++ + concat (map (\(x,y) -> drawWires tp x1 x x2 y "black") conn) + -- ++ wires (x-1) p1 x "green" + -- ++ wires (x+w) p2 (x+w+1) "red" + +-- constrain that Ports is at least Int units above the topmost portion of Diagram +constrainTop :: TrackIdentifier -> Float -> Diagram -> ConstraintM () +constrainTop v i (DiagramComp d1 d2) = do { constrainTop v i d1 ; constrainTop v i d2 ; return () } +constrainTop v i (DiagramBypassTop p d) = constrain v LT (uppermost p) (-1 * i) +constrainTop v i (DiagramBypassBot d p) = constrainTop v (i+1) d +constrainTop v i (DiagramBox ptop pin r pout pbot) = constrain v LT ptop (-1 * i) + +-- constrain that Ports is at least Int units below the bottommost portion of Diagram +constrainBot :: Diagram -> Float -> TrackIdentifier -> ConstraintM () +constrainBot (DiagramComp d1 d2) i v = do { constrainBot d1 i v ; constrainBot d2 i v ; return () } +constrainBot (DiagramBypassTop p d) i v = constrainBot d (i+1) v +constrainBot (DiagramBypassBot d p) i v = constrain v GT (lowermost p) 2 +constrainBot (DiagramBox ptop pin r pout pbot) i v = constrain v GT pbot i + +-- | The width of a box is easy to calculate +width :: Diagram -> Float +width (DiagramComp d1 d2) = (width d1) + 1 + (width d2) +width (DiagramBox ptop pin x pout pbot) = 2 +width (DiagramBypassTop p d) = (width d) + 2 +width (DiagramBypassBot d p) = (width d) + 2 + +drawWires :: TrackPositions -> Float -> Tracks -> Float -> Tracks -> String -> String +drawWires tp x1 (TT a b) x2 (TT a' b') color = drawWires tp x1 a x2 a' color ++ drawWires tp x1 b x2 b' color +drawWires tp x1 (T a) x2 (T a') color = drawLine x1 (tp!a) x2 (tp!a') color "-" +drawWires tp x1 (TU a) x2 (TU a') color = drawLine x1 (tp!a) x2 (tp!a') color "dashed" +drawWires tp _ _ _ _ _ = error "drawwires fail" + +tikZ :: TrackPositions -> + Diagram -> + Float -> -- horizontal position + String +tikZ m = tikZ' + where + tikZ' d@(DiagramComp d1 d2) x = tikZ' d1 x + ++ wires' (x+width d1) (getOut d1) (x+width d1+0.5) "black" "->" + ++ wires' (x+width d1+0.5) (getOut d1) (x+width d1+1) "black" "-" + ++ tikZ' d2 (x + width d1 + 1) + tikZ' d'@(DiagramBypassTop p d) x = let top = getTop d' in + let bot = getBot d' in + drawBox x top (x+width d') bot "gray!50" "second" + ++ drawWires m x (getIn d) (x+1) (getIn d) "black" + ++ tikZ' d (x+1) + ++ drawWires m (x+1+width d) (getOut d) (x+1+width d+1) (getOut d) "black" + ++ drawWires m x p (x+1+width d+1) p "black" + tikZ' d'@(DiagramBypassBot d p) x = let top = getTop d' in + let bot = getBot d' in + drawBox x top (x+width d') bot "gray!50" "first" + ++ drawWires m x (getIn d) (x+1) (getIn d) "black" + ++ tikZ' d (x+1) + ++ drawWires m (x+1+width d) (getOut d) (x+1+width d+1) (getOut d) "black" + ++ drawWires m x p (x+1+width d+1) p "black" + tikZ' d@(DiagramBox ptop pin r pout pbot) x = r m x (m ! ptop) (x + width d) (m ! pbot) + + wires x1 t x2 c = wires' x1 t x2 c "-" + + wires' :: Float -> Tracks -> Float -> String -> String -> String + wires' x1 (TT x y) x2 color st = wires' x1 x x2 color st ++ wires' x1 y x2 color st + wires' x1 (T v) x2 color st = drawLine x1 (m ! v) x2 (m ! v) color st -- ++ textc ((x1+x2) / 2) (m!v) (show v) "purple" + wires' x1 (TU v) x2 color st = drawLine x1 (m ! v) x2 (m ! v) color "dashed" + + getTop :: Diagram -> Float + getTop (DiagramComp d1 d2) = min (getTop d1) (getTop d2) + getTop (DiagramBox ptop _ _ _ _) = m ! ptop + getTop (DiagramBypassTop p d) = (m ! uppermost p) - 1 + getTop (DiagramBypassBot d p) = getTop d - 1 + + getBot :: Diagram -> Float + getBot (DiagramComp d1 d2) = max (getBot d1) (getBot d2) + getBot (DiagramBox _ _ _ _ pbot) = m ! pbot + getBot (DiagramBypassTop p d) = getBot d + 1 + getBot (DiagramBypassBot d p) = (m ! lowermost p) + 1 + +-- allocates multiple tracks, adding constraints that they are at least one unit apart +alloc :: PortShape a -> ConstraintM (TrackIdentifier,Tracks,TrackIdentifier) +alloc shape = do { tracks <- alloc' shape + ; T ptop <- alloc1 + ; T pbot <- alloc1 + ; constrain ptop LT (uppermost tracks) (-1) + ; constrain pbot GT (lowermost tracks) 1 + ; return (ptop,tracks,pbot) + } + where + alloc' :: PortShape a -> ConstraintM Tracks + alloc' PortUnit = do { T x <- alloc1 ; return (TU x) } + alloc' (PortFree _) = do { x <- alloc1 ; return x } + alloc' (PortTensor p1 p2) = do { x1 <- alloc' p1 + ; x2 <- alloc' p2 + ; constrain (lowermost x1) LT (uppermost x2) (-1) + ; return (TT x1 x2) + } + +do_lp_solve :: [Constraint] -> IO String +do_lp_solve c = do { let stdin = "min: x1;\n" ++ (foldl (++) "" (map show c)) ++ "\n" + ; putStrLn stdin + ; stdout <- readProcess "lp_solve" [] stdin + ; return stdout + } + +splitWs :: String -> [String] +splitWs s = splitWs' "" s + where + splitWs' [] [] = [] + splitWs' acc [] = [acc] + splitWs' [] (' ':k) = splitWs' [] k + splitWs' acc (' ':k) = acc:(splitWs' [] k) + splitWs' acc (x:k) = splitWs' (acc++[x]) k + +lp_solve_to_trackpos :: String -> TrackPositions +lp_solve_to_trackpos s = toTrackPos $ map parse $ catMaybes $ map grab $ lines s + where + grab ('x':k) = Just k + grab _ = Nothing + parse :: String -> (Int,Float) + parse s = case splitWs s of + [a,b] -> (read a, read b) + _ -> error "parse: should not happen" + toTrackPos :: [(Int,Float)] -> TrackPositions + toTrackPos [] tr = 0 -- error $ "could not find track "++show tr + toTrackPos ((i,f):rest) tr = if (i==tr) then f else toTrackPos rest tr + +toTikZ :: GArrowSkeleton m a b -> IO String +toTikZ g = + let cm = do { let g' = detectShape g + ; g'' <- mkdiag g' + ; return g'' + } + in do { let (_,constraints) = execState cm (0,[]) + ; lps <- do_lp_solve $ constraints + ; let trackpos = lp_solve_to_trackpos lps + ; return $ tikZ trackpos (evalState cm (0,[])) 0 + } + +tikz :: (forall g a . + (Int -> PGArrow g (GArrowUnit g) a) -> + ( + forall b . PGArrow g (GArrowTensor g b b) b) -> + PGArrow g (GArrowUnit g) a) -> IO () + +tikz x = tikz' $ optimize $ unG (x (\c -> PGArrowD { unG = GAS_const c }) (PGArrowD { unG = GAS_merge }) ) + +tikz' example + = do putStrLn "\\documentclass{article}" + putStrLn "\\usepackage[paperwidth=\\maxdimen,paperheight=\\maxdimen]{geometry}" + putStrLn "\\usepackage{tikz}" + putStrLn "\\usepackage{amsmath}" + putStrLn "\\usepackage[tightpage,active]{preview}" + putStrLn "\\begin{document}" + putStrLn "\\setlength\\PreviewBorder{5pt}" + putStrLn "\\begin{preview}" + putStrLn $ "\\begin{tikzpicture}[every on chain/.style={join=by ->},yscale=-1]" + tikz <- toTikZ example + putStrLn tikz + putStrLn "\\end{tikzpicture}" + putStrLn "\\end{preview}" + --putStrLn "\\pagebreak" + --putStrLn "\\begin{align*}" + --putStr (toTikZ' example) + --putStrLn "\\end{align*}" + putStrLn "\\end{document}" + +-- Random TikZ routines +textc x y text color = + "\\node[anchor=center,color="++color++"] at ("++show (x*xscale)++"cm,"++show (y*yscale)++"cm) "++ + "{{\\tt{"++text++"}}};\n" + +drawBox x1 y1 x2 y2 color text = + "\\node[anchor=north west] at ("++show (x1*xscale)++"cm,"++show (y1*yscale)++"cm) "++ + "{{\\tt{"++text++"}}};\n" + ++ + "\\path[draw,color="++color++"]"++ + " ("++show (x1*xscale)++","++show (y1*yscale)++") rectangle ("++ + show (x2*xscale)++","++show (y2*yscale)++");\n" + +drawLine x1 y1 x2 y2 color style = + "\\path[draw,color="++color++","++style++"] "++ + "("++show (x1*xscale)++","++show (y1*yscale)++") -- " ++ + "("++show (x2*xscale)++","++show (y2*yscale)++");\n" + +-- | x scaling factor for the entire diagram, since TikZ doesn't scale font sizes +xscale = 1 -{- -instance GArrow GArrowTikZ (,) where - ga_id = - ga_comp f g = - ga_second f = - ga_cancell f = - ga_cancelr f = - ga_uncancell f = - ga_uncancelr f = - ga_assoc f = - ga_unassoc f = - -instance GArrowDrop GArrowTikZ (,) where - ga_drop = - -instance GArrowCopy GArrowTikZ (,) where - ga_copy = - -instance GArrowSwap GArrowTikZ (,) where - ga_swap = - -instance GArrowLoop GArrowTikZ (,) where - ga_loop = - -instance GArrowLiteral GArrowTikZ (,) where - ga_literal = --} +-- | y scaling factor for the entire diagram, since TikZ doesn't scale font sizes +yscale = 1