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{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Much.Action where
import Blessings.String
import Scanner
import Much.State
import Much.TagUtils
import Much.TreeSearch
import Much.TreeView
import Much.TreeZipperUtils
import qualified Data.Tree as Tree
import qualified Data.Tree.Zipper as Z
import qualified Notmuch
import qualified Notmuch.Message as Notmuch
import qualified Notmuch.SearchResult as Notmuch
displayKey :: String -> State -> IO State
displayKey s q = return q { flashMessage = Plain $ show s }
displayMouse :: Scan -> State -> IO State
displayMouse info q =
return q { flashMessage = SGR [38,5,202] $ Plain $ show info }
defaultMouse1Click :: Monad m => Int -> State -> m State
defaultMouse1Click y q@State{..} = do
let linearClickPos =
let i = (y - length headBuffer + yoffset) - 1 {-zero-based-}
in if 0 <= i && i < length treeBuffer
then Just i
else Nothing
case linearClickPos of
Nothing ->
return q
{ flashMessage = Plain "nothing to click"
}
Just i ->
return q
{ cursor = findNextN i $ Z.root cursor
}
moveCursorDown :: Monad m => Int -> State -> m State
moveCursorDown n q@State{..} =
let cursor' = findNextN n cursor
q' = q { cursor = cursor' }
in case botOverrun q' of
0 -> return q'
i -> moveTreeUp i q'
moveCursorUp :: Monad m => Int -> State -> m State
moveCursorUp n q@State{..} =
let cursor' = findPrevN n cursor
q' = q { cursor = cursor' }
in case topOverrun q' of
0 -> return q'
i -> moveTreeDown i q'
moveTreeUp :: Monad m => Int -> State -> m State
moveTreeUp n q@State{..} =
let q' = q { yoffset = min (length treeBuffer - 1) $ max 0 (yoffset + n) }
in case topOverrun q' of
0 -> return q'
i -> moveCursorDown i q'
moveTreeDown :: Monad m => Int -> State -> m State
moveTreeDown n q@State{..} =
let q' = q { yoffset = min (length treeBuffer - 1) $ max 0 (yoffset - n) }
in case botOverrun q' of
0 -> return q'
i -> moveCursorUp i q'
moveTreeLeft :: Monad m => Int -> State -> m State
moveTreeLeft n q@State{..} =
return q { xoffset = xoffset + n }
moveTreeRight :: Monad m => Int -> State -> m State
moveTreeRight n q@State{..} =
return q { xoffset = max 0 (xoffset - n) }
moveToParent :: Monad m => State -> m State
moveToParent q@State{..} =
case Z.parent cursor of
Nothing -> return q { flashMessage = "cannot go further up" }
Just cursor' ->
let q' = q { cursor = cursor' }
in case topOverrun q' of
0 -> return q'
i -> moveTreeDown i q'
moveCursorToThread :: Monad m => State -> m State
moveCursorToThread q@State{..} =
case Z.label cursor of
TVSearch _ ->
return q { flashMessage = "cannot go further up" }
TVSearchResult _ ->
return q
_ ->
moveToParent q >>= moveCursorToThread
moveCursorToUnread
:: (Num a, Monad m, Eq a)
=> (Z.TreePos Z.Full TreeView -> Maybe (Z.TreePos Z.Full TreeView))
-> (State -> a)
-> (a -> State -> m State)
-> State -> m State
moveCursorToUnread cursorMove getTreeMoveCount treeMove q@State{..} =
case cursorMove cursor >>= rec of
Just cursor' ->
let q' = q { cursor = cursor' }
in case getTreeMoveCount q' of
0 -> return q'
i -> treeMove i q'
Nothing ->
return q { flashMessage = "no unread message in sight" }
where
rec loc =
if hasTag "unread" loc
then Just loc
else cursorMove loc >>= rec
hasTag tag loc =
case Z.label loc of
TVSearchResult sr ->
tag `elem` Notmuch.searchTags sr
TVMessage m ->
tag `elem` Notmuch.messageTags m
_ ->
False
moveCursorUpToPrevUnread :: Monad m => State -> m State
moveCursorUpToPrevUnread =
moveCursorToUnread findPrev topOverrun moveTreeDown
moveCursorDownToNextUnread :: Monad m => State -> m State
moveCursorDownToNextUnread =
moveCursorToUnread findNext botOverrun moveTreeUp
openFold :: State -> IO State
openFold q@State{..} =
handle <$> loadSubForest (Z.label cursor)
where
handle = \case
Left err ->
q { flashMessage = SGR [31] $ Plain err }
Right sf ->
q { cursor = Z.modifyTree (setSubForest sf) cursor }
closeFold :: State -> IO State
closeFold q@State{..} =
let sf = unloadSubForest (Z.tree cursor)
in return q { cursor = Z.modifyTree (setSubForest sf) cursor }
toggleFold :: State -> IO State
toggleFold q@State{..} =
if hasUnloadedSubForest (Z.tree cursor)
then openFold q
else closeFold q
toggleTagAtCursor :: Tag -> State -> IO State
toggleTagAtCursor tag q@State{..} = case Z.label cursor of
TVSearchResult sr -> do
let tagOp =
if tag `elem` Notmuch.searchTags sr
then DelTag
else AddTag
tagOps = [tagOp tag]
Notmuch.notmuchTag tagOps sr
let cursor' = Z.modifyTree (patchTreeTags tagOps) cursor
return q { cursor = cursor' }
TVMessage m -> do
let tagOp =
if tag `elem` Notmuch.messageTags m
then DelTag
else AddTag
tagOps = [tagOp tag]
Notmuch.notmuchTag tagOps m
let cursor' =
-- TODO this needs a nice name
modifyFirstParentLabelWhere isTVSearchResult f $
Z.modifyLabel f cursor
f = patchTags tagOps
return q { cursor = cursor' }
_ -> return q { flashMessage = "nothing happened" }
topOverrun :: State -> Int
topOverrun State{..} =
max 0 (- (linearPos cursor - yoffset))
botOverrun :: State -> Int
botOverrun State{..} =
max 0 (linearPos cursor - yoffset - (screenHeight - length headBuffer - 1))
setSubForest :: Tree.Forest a -> Tree.Tree a -> Tree.Tree a
setSubForest sf t = t { Tree.subForest = sf }
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