X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FhsSyn%2FHsDoc.hs;h=bd75408f11a9e33cd45ebdcf2365b72248f51392;hb=83e979b3db9acba32973ce065fce6248ee0f59a6;hp=51ef579a7588233650eeddae10820ae686bdcd04;hpb=190f24892156953d73b55401d0467a6f1a88ce5d;p=ghc-hetmet.git

diff --git a/compiler/hsSyn/HsDoc.hs b/compiler/hsSyn/HsDoc.hs
index 51ef579..bd75408 100644
--- a/compiler/hsSyn/HsDoc.hs
+++ b/compiler/hsSyn/HsDoc.hs
@@ -1,3 +1,10 @@
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
 module HsDoc (
   HsDoc(..),
   LHsDoc,
@@ -8,7 +15,6 @@ module HsDoc (
 
 #include "HsVersions.h"
 
-import RdrName
 import Outputable
 import SrcLoc
 
@@ -28,6 +34,7 @@ data HsDoc id
   | DocDefList [(HsDoc id, HsDoc id)]
   | DocCodeBlock (HsDoc id)
   | DocURL String
+  | DocPic String
   | DocAName String
   deriving (Eq, Show)
 
@@ -62,16 +69,34 @@ docAppend d1 d2
 -- is a DocMonospaced and make it into a DocCodeBlock
 docParagraph :: HsDoc id -> HsDoc id
 docParagraph (DocMonospaced p)
-  = DocCodeBlock p
+  = DocCodeBlock (docCodeBlock p)
 docParagraph (DocAppend (DocString s1) (DocMonospaced p))
   | all isSpace s1
-  = DocCodeBlock p
+  = DocCodeBlock (docCodeBlock p)
 docParagraph (DocAppend (DocString s1)
     (DocAppend (DocMonospaced p) (DocString s2)))
   | all isSpace s1 && all isSpace s2
-  = DocCodeBlock p
+  = DocCodeBlock (docCodeBlock p)
 docParagraph (DocAppend (DocMonospaced p) (DocString s2))
   | all isSpace s2
-  = DocCodeBlock p
+  = DocCodeBlock (docCodeBlock p)
 docParagraph p
   = DocParagraph p
+
+
+-- Drop trailing whitespace from @..@ code blocks.  Otherwise this:
+--
+--    -- @
+--    -- foo
+--    -- @
+--
+-- turns into (DocCodeBlock "\nfoo\n ") which when rendered in HTML
+-- gives an extra vertical space after the code block.  The single space
+-- on the final line seems to trigger the extra vertical space.
+--
+docCodeBlock :: HsDoc id -> HsDoc id
+docCodeBlock (DocString s)
+  = DocString (reverse $ dropWhile (`elem` " \t") $ reverse s)
+docCodeBlock (DocAppend l r)
+  = DocAppend l (docCodeBlock r)
+docCodeBlock d = d