diff options
Diffstat (limited to 'src/Main.hs')
| -rw-r--r-- | src/Main.hs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/Main.hs b/src/Main.hs index b7a5ebf..71d5cd7 100644 --- a/src/Main.hs +++ b/src/Main.hs @@ -157,6 +157,8 @@ data Command | SetCount (Maybe Int) | SetRegister Char | DeleteEntireLine + | DeleteLeft + | DeleteRight instance Monoid Command where mempty = Nop @@ -347,6 +349,41 @@ execCommand DeleteEntireLine = & registers %~ (at r .~ v) . (at defaultRegister .~ v) +execCommand DeleteLeft = + modify $ \q -> do + let c = maybe 1 id $ _count q + r = -- TODO only use "- if we're deleting less than one line + if _register q == defaultRegister + then '-' -- smallDeleteRegister + else _register q + + lhs = fst (_buffer q) + (lhs', y) = splitAt (length lhs - c) lhs + + + q & buffer . _1 .~ lhs' + & register .~ defaultRegister + & registers %~ (at r .~ Just y) + . (at defaultRegister .~ Just y) + +execCommand DeleteRight = + modify $ \q -> do + let c = maybe 1 id $ _count q + r = -- TODO only use "- if we're deleting less than one line + if _register q == defaultRegister + then '-' -- smallDeleteRegister + else _register q + + rhs = snd (_buffer q) + (y, rhs') = splitAt c rhs + + + q & buffer . _2 .~ rhs' + & register .~ defaultRegister + & registers %~ (at r .~ Just y) + . (at defaultRegister .~ Just y) + + -- XXX assumes that the cursor is already at the (cleared) input line -- TODO renderInputLine looks like it wants to be -> VT () @@ -444,6 +481,8 @@ dmap :: Keymap dmap = [ ("\ESC", ChangeMode NormalMode <> SetCount Nothing) , ("d", DeleteEntireLine <> ChangeMode NormalMode <> SetCount Nothing) + , ("h", DeleteLeft <> ChangeMode NormalMode <> SetCount Nothing) + , ("l", DeleteRight <> ChangeMode NormalMode <> SetCount Nothing) ] |