Support hyperlinks in search output

Add `--hyperlink` flag to search sub command which outputs ANSI escape sequences
that supporting terminal emulators can recognize.

src/Action/CmdLine.hs

@@ -25,6 +25,7 @@ data CmdLine
         ,json :: Bool
         ,jsonl :: Bool
         ,link :: Bool
+        ,hyperlink :: Bool
         ,numbers :: Bool
         ,info :: Bool
         ,database :: FilePath
@@ -114,6 +115,7 @@ search_ = Search
     ,json = def &= name "json" &= help "Get result as JSON"
     ,jsonl = def &= name "jsonl" &= help "Get result as JSONL (JSON Lines)"
     ,link = def &= help "Give URL's for each result"
+    ,hyperlink = def &= help "Hyperlink results with ANSI escape sequences"
     ,numbers = def &= help "Give counter for each result"
     ,info = def &= help "Give extended information about the first result"
     ,database = def &= typFile &= help "Name of database to use (use .hoo extension)"

src/Action/Search.hs

@@ -43,7 +43,7 @@ actionSearch Search{..} = replicateM_ repeat_ $ -- deliberately reopen the datab
             count' <- pure $ fromMaybe 10 count
             (q, res) <- pure $ search store $ parseQuery $ unwords query
             whenLoud $ putStrLn $ "Query: " ++ unescapeHTML (LBS.unpack $ renderMarkup $ renderQuery q)
-            let (shown, hidden) = splitAt count' $ nubOrd $ map (targetResultDisplay link) res
+            let (shown, hidden) = splitAt count' $ nubOrd $ map (targetResultDisplay link hyperlink) res
             if null res then
                 putStrLn "No results found"
              else if info then do
@@ -71,11 +71,13 @@ targetInfo Target{..} =
 
 -- | Returns the Target formatted as an item to display in the results
 -- | Bool argument decides whether links are shown
-targetResultDisplay :: Bool -> Target -> String
-targetResultDisplay link Target{..} = unHTML $ unwords $
+targetResultDisplay :: Bool -> Bool -> Target -> String
+targetResultDisplay link hyperlink Target{..} = unHTML $ unwords $
         map fst (maybeToList targetModule) ++
-        [targetItem] ++
+        [if hyperlink then targetItemHyperlink  else targetItem] ++
         ["-- " ++ targetURL | link]
+     where
+        targetItemHyperlink = "\ESC]8;;" ++ targetURL ++ "\BEL" ++ targetItem ++ "\ESC]8;;\BEL"
 
 unHTMLtargetItem :: Target -> Target
 unHTMLtargetItem target = target {targetItem = unHTML $ targetItem target}