X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FhsSyn%2FHsDoc.hs;h=bd75408f11a9e33cd45ebdcf2365b72248f51392;hb=3403e40722df9ad29eef8ec6224112a57b4fa7fc;hp=0665e9d8b6e5239a31661c3afbbe6df87a63b897;hpb=7fc749a43b4b6b85d234fa95d4928648259584f4;p=ghc-hetmet.git

diff --git a/compiler/hsSyn/HsDoc.hs b/compiler/hsSyn/HsDoc.hs
index 0665e9d..bd75408 100644
--- a/compiler/hsSyn/HsDoc.hs
+++ b/compiler/hsSyn/HsDoc.hs
@@ -34,6 +34,7 @@ data HsDoc id
   | DocDefList [(HsDoc id, HsDoc id)]
   | DocCodeBlock (HsDoc id)
   | DocURL String
+  | DocPic String
   | DocAName String
   deriving (Eq, Show)
 
@@ -68,16 +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