1 files changed, 22 insertions, 16 deletions
diff --git a/SourceFile.hs b/SourceFile.hs
index 0a054c0..8fc9dbf 100644
--- a/SourceFile.hs
+++ b/SourceFile.hs
@@ -19,19 +19,25 @@ data Occurrence = Occurrence
     , occArgs :: [(Text, Text)] }  -- prefix spacing, argument value
   deriving (Show)
 
-instance Pretty SourceFile where
-    pretty' (SourceFile cs) = mconcat (map pretty' cs)
-
-instance Pretty Chunk where
-    pretty' (CSkip s) = B.fromLazyText s
-    pretty' (COcc occ) = pretty' occ
-
-instance Pretty Occurrence where
-    pretty' (Occurrence name args) =
-        ansiBG '1' (B.fromLazyText name)
-        <> mconcat [ansiBG '4' (B.fromLazyText pre)
-                      <> ansiBG '3' (B.fromLazyText val)
-                   | (pre, val) <- args]
-      where
-        ansiBG :: Char -> Builder -> Builder
-        ansiBG c b = B.fromString ("\x1B[1;4" ++ c : "m") <> b <> B.fromString "\x1B[0m"
+occurrenceToBuilder :: Bool -> Occurrence -> Builder
+occurrenceToBuilder useClr (Occurrence name args) =
+    ansiBG '1' (B.fromLazyText name)
+    <> mconcat [ansiBG '4' (B.fromLazyText pre)
+                  <> ansiBG '3' (B.fromLazyText val)
+               | (pre, val) <- args]
+  where
+    ansiBG :: Char -> Builder -> Builder
+    ansiBG c b
+      | useClr && stdoutIsTTY = B.fromString ("\x1B[1;4" ++ c : "m") <> b <> B.fromString "\x1B[0m"
+      | otherwise = b
+
+chunkToBuilder :: Bool -> Chunk -> Builder
+chunkToBuilder _ (CSkip s) = B.fromLazyText s
+chunkToBuilder useClr (COcc occ) = occurrenceToBuilder useClr occ
+
+sourceFileToBuilder :: Bool -> SourceFile -> Builder
+sourceFileToBuilder useClr (SourceFile cs) = mconcat (map (chunkToBuilder useClr) cs)
+
+instance Pretty SourceFile where pretty' = sourceFileToBuilder True
+instance Pretty Chunk      where pretty' = chunkToBuilder      True
+instance Pretty Occurrence where pretty' = occurrenceToBuilder True