From a6b938977705042b5ca0ca9c3272f76f229f1a42 Mon Sep 17 00:00:00 2001
From: tv <tv@shackspace.de>
Date: Sun, 27 Jul 2014 17:24:17 +0200
Subject: purge non-MotionCommand motion commands

---
 Main.hs | 51 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 28 insertions(+), 23 deletions(-)

(limited to 'Main.hs')

diff --git a/Main.hs b/Main.hs
index 484f72f..e4c9a13 100644
--- a/Main.hs
+++ b/Main.hs
@@ -77,6 +77,15 @@ uiThread mod lock = do
           ringBell >>
           putStrLn (prettyError err)
 
+        -- TODO move this to execCommand / throwError
+        case c of
+          MotionCommand motion ->
+            when (buffer st == buffer st') $
+              ringBell >>
+              putStrLn (prettyError $ OtherError $ "motion failed: " ++ show motion)
+          _ -> return ()
+
+
         when (show (mode st) /= show (mode st')) $ do
             putStrLn $ "change mode: " ++ (show $ mode st')
 
@@ -92,15 +101,16 @@ data Command
   | InsertChar Char
   | InsertNextCharVerbatim
   | InsertCharThenChangeMode Char Mode
-  | MoveCursorRight
-  | MoveCursorLeft
   | KillLastWord
   | KillLastChar
   | KillNextChar
   | ExecuteInputBuffer
   | UnboundSequence String String
-  | GotoBOL
-  | GotoEOL
+  | MotionCommand LeftRightMotion
+  -- TODO Move Count Motion
+  --      Delete Count Register Motion
+  --      etc.
+
 
 data ExecError
   = UnboundSequenceError String String
@@ -175,21 +185,8 @@ insertChar c (ls, rs) = (ls ++ [c], rs)
 
 execCommand :: Command -> ExecM ()
 
-execCommand GotoBOL =
-    modifyBuffer (move GotoFirstChar)
-
-execCommand GotoEOL =
-    modifyBuffer (move GotoEndOfLine)
-
-execCommand MoveCursorLeft = do
-    get >>= flip (when . null . fst . buffer)
-                 (throwError $ OtherError "no char to move left")
-    modifyBuffer (move $ GotoLeft 1)
-
-execCommand MoveCursorRight = do
-    get >>= flip (when . null . snd . buffer)
-                 (throwError $ OtherError "no char to move right")
-    modifyBuffer (move $ GotoRight 1)
+execCommand (MotionCommand x) =
+    modifyBuffer (move x)
 
 execCommand (InsertChar c) =
     modifyBuffer (insertChar c)
@@ -303,16 +300,24 @@ charToCode c = "\\x" ++ showIntAtBase 16 intToDigit (ord c) ""
 
 -- TODO pressing ESC, then F11 etc. is ugly
 nmap =
-  [ ("\x01", GotoBOL)
-  , ("\x05", GotoEOL)
+  [ ("\x01", MotionCommand GotoFirstChar)
+  , ("\x05", MotionCommand GotoEndOfLine)
   , ("\x1b[3~", KillNextChar)
-  , ("\x1b[C", MoveCursorRight)
-  , ("\x1b[D", MoveCursorLeft)
+  , ("\x1b[C", MotionCommand $ GotoRight 1)
+  , ("\x1b[D", MotionCommand $ GotoLeft 1)
   , ("\x16", InsertNextCharVerbatim) -- ^V
   , ("\x17", KillLastWord) -- ^W
   , ("\x0a", ExecuteInputBuffer)
   , ("\x7f", KillLastChar) -- Delete
   , ("\x08", KillLastChar) -- BackSpace
+
+  -- TODO replace by backward-word
+  --                 forward-word
+  -- OR
+  --    [MotionCommand SkipSpaceRight, MotionCommand $ GotillFindRight 1 ' ']
+  --    etc.
+  , ("\x1bOc", MotionCommand $ GotillFindRight 1 ' ')
+  , ("\x1bOd", MotionCommand $ GotillFindLeft 1 ' ')
   ]
   ++ [unboundSequence "\x1b[2~" "<Insert>"]
   ++ [unboundSequence "\x1b[5~" "<Prior>"]    -- page up
-- 
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