Set do_bold based on $TERM, not platform

[ghc-hetmet.git] / compiler / ghci / InteractiveUI.hs

diff --git a/compiler/ghci/InteractiveUI.hs b/compiler/ghci/InteractiveUI.hs
index dfdbd99..42424e6 100644 (file)
--- a/compiler/ghci/InteractiveUI.hs
+++ b/compiler/ghci/InteractiveUI.hs
@@ -76,6 +76,7 @@ import System.Exit    ( exitWith, ExitCode(..) )
 import System.Directory
 import System.IO
 import System.IO.Error as IO
+import System.IO.Unsafe
 import Data.Char
 import Data.Dynamic
 import Data.Array
@@ -1345,10 +1346,11 @@ completeNone w = return []
 completeWord :: String -> Int -> Int -> IO (Maybe (String, [String]))
 completeWord w start end = do
   line <- Readline.getLineBuffer
-  case w of 
+  let line_words = words (dropWhile isSpace line)
+  case w of
      ':':_ | all isSpace (take (start-1) line) -> wrapCompleter completeCmd w
      _other
-       | Just c <- is_cmd line -> do
+       | ((':':c) : _) <- line_words -> do
           maybe_cmd <- lookupCommand c
            let (n,w') = selectWord (words' 0 line)
           case maybe_cmd of
@@ -1357,6 +1359,8 @@ completeWord w start end = do
             Just (_,_,True,complete) -> let complete' w = do rets <- complete w
                                                               return (map (drop n) rets)
                                          in wrapCompleter complete' w'
+        | ("import" : _) <- line_words ->
+                wrapCompleter completeModule w
        | otherwise     -> do
                --printf "complete %s, start = %d, end = %d\n" w start end
                wrapCompleter completeIdentifier w
@@ -1372,9 +1376,6 @@ completeWord w start end = do
               | offset+length x >= start = (start-offset,take (end-offset) x)
               | otherwise = selectWord xs
 
-is_cmd line 
- | ((':':w) : _) <- words (dropWhile isSpace line) = Just w
- | otherwise = Nothing
 
 completeCmd w = do
   cmds <- readIORef commands
@@ -1817,18 +1818,18 @@ findBreakByCoord mb_file (line, col) arr
                               GHC.srcSpanStartLine span == line,
                               GHC.srcSpanStartCol span >= col ]
 
--- for now, use ANSI bold on Unixy systems.  On Windows, we add a line
--- of carets under the active expression instead.  The Windows console
--- doesn't support ANSI escape sequences, and most Unix terminals
--- (including xterm) do, so this is a reasonable guess until we have a
--- proper termcap/terminfo library.
-#if !defined(mingw32_TARGET_OS)
-do_bold = True
-#else
-do_bold = False
-#endif
+-- For now, use ANSI bold on terminals that we know support it.
+-- Otherwise, we add a line of carets under the active expression instead.
+-- In particular, on Windows and when running the testsuite (which sets
+-- TERM to vt100 for other reasons) we get carets.
+-- We really ought to use a proper termcap/terminfo library.
+do_bold :: Bool
+do_bold = unsafePerformIO (System.Environment.getEnv "TERM") `elem`
+          ["xterm", "linux"]
 
+start_bold :: String
 start_bold = "\ESC[1m"
+end_bold :: String
 end_bold   = "\ESC[0m"
 
 listCmd :: String -> GHCi ()