408 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			Haskell
		
	
	
	
	
	
			
		
		
	
	
			408 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			Haskell
		
	
	
	
	
	
-- The accounts screen, showing accounts and balances like the CLI balance command.
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE CPP #-}
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module Hledger.UI.AccountsScreen
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 (accountsScreen
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 ,asInit
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 ,asSetSelectedAccount
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 )
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where
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import Brick
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import Brick.Widgets.List
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import Brick.Widgets.Edit
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import Control.Monad
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import Control.Monad.IO.Class (liftIO)
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import Data.List
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import Data.Maybe
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#if !(MIN_VERSION_base(4,11,0))
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import Data.Monoid ((<>))
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#endif
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import qualified Data.Text as T
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import Data.Time.Calendar (Day, addDays)
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import qualified Data.Vector as V
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import Graphics.Vty (Event(..),Key(..),Modifier(..))
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import Lens.Micro.Platform
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import Safe
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import System.Console.ANSI
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import System.FilePath (takeFileName)
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import Hledger
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import Hledger.Cli hiding (progname,prognameandversion)
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import Hledger.UI.UIOptions
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import Hledger.UI.UITypes
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import Hledger.UI.UIState
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import Hledger.UI.UIUtils
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import Hledger.UI.Editor
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import Hledger.UI.RegisterScreen
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import Hledger.UI.ErrorScreen
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accountsScreen :: Screen
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accountsScreen = AccountsScreen{
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   sInit   = asInit
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  ,sDraw   = asDraw
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  ,sHandle = asHandle
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  ,_asList            = list AccountsList V.empty 1
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  ,_asSelectedAccount = ""
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  }
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asInit :: Day -> Bool -> UIState -> UIState
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asInit d reset ui@UIState{
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  aopts=uopts@UIOpts{cliopts_=copts@CliOpts{reportopts_=ropts}},
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  ajournal=j,
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  aScreen=s@AccountsScreen{}
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  } =
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  ui{aopts=uopts', aScreen=s & asList .~ newitems'}
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   where
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    newitems = list AccountsList (V.fromList $ displayitems ++ blankitems) 1
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    -- decide which account is selected:
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    -- if reset is true, the first account;
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    -- otherwise, the previously selected account if possible;
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    -- otherwise, the first account with the same prefix (eg first leaf account when entering flat mode);
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    -- otherwise, the alphabetically preceding account.
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    newitems' = listMoveTo selidx newitems
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      where
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        selidx = case (reset, listSelectedElement $ _asList s) of
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                   (True, _)               -> 0
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                   (_, Nothing)            -> 0
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                   (_, Just (_,AccountsScreenItem{asItemAccountName=a})) -> 
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                     headDef 0 $ catMaybes [
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                       findIndex (a ==) as
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                      ,findIndex (a `isAccountNamePrefixOf`) as
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                      ,Just $ max 0 (length (filter (< a) as) - 1)
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                      ]
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                      where
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                        as = map asItemAccountName displayitems
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    uopts' = uopts{cliopts_=copts{reportopts_=ropts'}}
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    ropts' = ropts{accountlistmode_=if tree_ ropts then ALTree else ALFlat}
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    -- Add a date:-tomorrow to the query to exclude future txns, by default.
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    -- XXX this necessitates special handling in multiBalanceReport, at least
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    pfq | presentorfuture_ uopts == PFFuture = Any
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        | otherwise                          = Date $ DateSpan Nothing (Just $ addDays 1 d)
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    q = And [queryFromOpts d ropts, pfq]
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    -- run the report
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    (items,_total) = report ropts' q j
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      where
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                 -- XXX in historical mode, --forecast throws off the starting balances
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        report | balancetype_ ropts == HistoricalBalance = balanceReportFromMultiBalanceReport
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               | otherwise                               = balanceReport
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                    -- still using the old balanceReport for change reports as it
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                    -- does not include every account from before the report period
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    -- pre-render the list items
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    displayitem (fullacct, shortacct, indent, bal) =
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      AccountsScreenItem{asItemIndentLevel        = indent
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                        ,asItemAccountName        = fullacct
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                        ,asItemDisplayAccountName = replaceHiddenAccountsNameWith "All" $ if tree_ ropts' then shortacct else fullacct 
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                        ,asItemRenderedAmounts    = map showAmountWithoutPrice amts -- like showMixedAmountOneLineWithoutPrice
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                        }
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      where
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        Mixed amts = normaliseMixedAmountSquashPricesForDisplay $ stripPrices bal
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        stripPrices (Mixed as) = Mixed $ map stripprice as where stripprice a = a{aprice=NoPrice}
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    displayitems = map displayitem items
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    -- blanks added for scrolling control, cf RegisterScreen 
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    blankitems = replicate 100
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      AccountsScreenItem{asItemIndentLevel        = 0
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                        ,asItemAccountName        = ""
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                        ,asItemDisplayAccountName = ""
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                        ,asItemRenderedAmounts    = []
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                        }
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asInit _ _ _ = error "init function called with wrong screen type, should not happen"
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asDraw :: UIState -> [Widget Name]
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asDraw UIState{aopts=uopts@UIOpts{cliopts_=copts@CliOpts{reportopts_=ropts}}
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                           ,ajournal=j
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                           ,aScreen=s@AccountsScreen{}
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                           ,aMode=mode
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                           } =
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  case mode of
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    Help       -> [helpDialog copts, maincontent]
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    -- Minibuffer e -> [minibuffer e, maincontent]
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    _          -> [maincontent]
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  where
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    maincontent = Widget Greedy Greedy $ do
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      c <- getContext
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      let
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        availwidth =
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          -- ltrace "availwidth" $
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          c^.availWidthL
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          - 2 -- XXX due to margin ? shouldn't be necessary (cf UIUtils)
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        displayitems = s ^. asList . listElementsL
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        maxacctwidthseen =
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          -- ltrace "maxacctwidthseen" $
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          V.maximum $
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          V.map (\AccountsScreenItem{..} -> asItemIndentLevel + Hledger.Cli.textWidth asItemDisplayAccountName) $
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          -- V.filter (\(indent,_,_,_) -> (indent-1) <= fromMaybe 99999 mdepth) $
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          displayitems
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        maxbalwidthseen =
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          -- ltrace "maxbalwidthseen" $
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          V.maximum $ V.map (\AccountsScreenItem{..} -> sum (map strWidth asItemRenderedAmounts) + 2 * (length asItemRenderedAmounts - 1)) displayitems
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        maxbalwidth =
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          -- ltrace "maxbalwidth" $
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          max 0 (availwidth - 2 - 4) -- leave 2 whitespace plus least 4 for accts
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        balwidth =
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          -- ltrace "balwidth" $
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          min maxbalwidth maxbalwidthseen
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        maxacctwidth =
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          -- ltrace "maxacctwidth" $
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          availwidth - 2 - balwidth
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        acctwidth =
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          -- ltrace "acctwidth" $
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          min maxacctwidth maxacctwidthseen
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        -- XXX how to minimise the balance column's jumping around
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        -- as you change the depth limit ?
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        colwidths = (acctwidth, balwidth)
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      render $ defaultLayout toplabel bottomlabel $ renderList (asDrawItem colwidths) True (_asList s)
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      where
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        ishistorical = balancetype_ ropts == HistoricalBalance
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        toplabel =
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              withAttr ("border" <> "filename") files
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          -- <+> withAttr ("border" <> "query") (str (if flat_ ropts then " flat" else ""))
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          <+> nonzero
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          <+> str (if ishistorical then " accounts" else " account changes")
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          -- <+> str (if ishistorical then " balances" else " changes")
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          <+> borderPeriodStr (if ishistorical then "at end of" else "in") (period_ ropts)
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          <+> borderQueryStr querystr
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          <+> togglefilters
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          <+> borderDepthStr mdepth
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          <+> str " ("
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          <+> cur
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          <+> str "/"
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          <+> total
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          <+> str ")"
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          <+> (if ignore_assertions_ $ inputopts_ copts
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               then withAttr ("border" <> "query") (str " ignoring balance assertions")
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               else str "")
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          where
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            files = case journalFilePaths j of
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                           [] -> str ""
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                           f:_ -> str $ takeFileName f
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                           -- [f,_:[]] -> (withAttr ("border" <> "bold") $ str $ takeFileName f) <+> str " (& 1 included file)"
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                           -- f:fs  -> (withAttr ("border" <> "bold") $ str $ takeFileName f) <+> str (" (& " ++ show (length fs) ++ " included files)")
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            querystr = query_ ropts
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            mdepth = depth_ ropts
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            togglefilters =
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              case concat [
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                   uiShowStatus copts $ statuses_ ropts
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                  ,if real_ ropts then ["real"] else []
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                  ] of
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                [] -> str ""
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                fs -> str " from " <+> withAttr ("border" <> "query") (str $ intercalate ", " fs) <+> str " txns"
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            nonzero | empty_ ropts = str ""
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                    | otherwise    = withAttr ("border" <> "query") (str " nonzero")
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            cur = str (case _asList s ^. listSelectedL of
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                        Nothing -> "-"
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                        Just i -> show (i + 1))
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            total = str $ show $ V.length nonblanks 
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            nonblanks = V.takeWhile (not . T.null . asItemAccountName) $ s ^. asList . listElementsL
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        bottomlabel = case mode of
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                        Minibuffer ed -> minibuffer ed
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                        _             -> quickhelp
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          where
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            quickhelp = borderKeysStr' [
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               ("?", str "help")
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--              ,("RIGHT", str "register")
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              ,("-+", str "depth")
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              ,("T", renderToggle (tree_ ropts) "flat" "tree")
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              ,("H", renderToggle (not ishistorical) "end-bals" "changes")
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              ,("F", renderToggle (presentorfuture_ uopts == PFFuture) "present" "future") 
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              --,("/", "filter")
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              --,("DEL", "unfilter")
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              --,("ESC", "cancel/top")
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              ,("a", str "add")
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--               ,("g", "reload")
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              ,("q", str "quit")
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              ]
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asDraw _ = error "draw function called with wrong screen type, should not happen"
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asDrawItem :: (Int,Int) -> Bool -> AccountsScreenItem -> Widget Name
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asDrawItem (acctwidth, balwidth) selected AccountsScreenItem{..} =
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  Widget Greedy Fixed $ do
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    -- c <- getContext
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      -- let showitem = intercalate "\n" . balanceReportItemAsText defreportopts fmt
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    render $
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      addamts asItemRenderedAmounts $
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      str (T.unpack $ fitText (Just acctwidth) (Just acctwidth) True True $ T.replicate (asItemIndentLevel) " " <> asItemDisplayAccountName) <+>
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      str "  " <+>
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      str (balspace asItemRenderedAmounts)
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      where
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        balspace as = replicate n ' '
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          where n = max 0 (balwidth - (sum (map strWidth as) + 2 * (length as - 1)))
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        addamts :: [String] -> Widget Name -> Widget Name
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        addamts [] w = w
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        addamts [a] w = (<+> renderamt a) w
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        -- foldl' :: (b -> a -> b) -> b -> t a -> b
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        -- foldl' (Widget -> String -> Widget) -> Widget -> [String] -> Widget
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        addamts (a:as) w = foldl' addamt (addamts [a] w) as
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        addamt :: Widget Name -> String -> Widget Name
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        addamt w a = ((<+> renderamt a) . (<+> str ", ")) w
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        renderamt :: String -> Widget Name
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        renderamt a | '-' `elem` a = withAttr (sel $ "list" <> "balance" <> "negative") $ str a
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                    | otherwise    = withAttr (sel $ "list" <> "balance" <> "positive") $ str a
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        sel | selected  = (<> "selected")
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            | otherwise = id
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asHandle :: UIState -> BrickEvent Name AppEvent -> EventM Name (Next UIState)
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asHandle ui0@UIState{
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   aScreen=scr@AccountsScreen{..}
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  ,aopts=UIOpts{cliopts_=copts}
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  ,ajournal=j
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  ,aMode=mode
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  } ev = do
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  d <- liftIO getCurrentDay
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  let
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    nonblanks = V.takeWhile (not . T.null . asItemAccountName) $ _asList^.listElementsL
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    lastnonblankidx = max 0 (length nonblanks - 1)
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  -- save the currently selected account, in case we leave this screen and lose the selection
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  let
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    selacct = case listSelectedElement _asList of
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                Just (_, AccountsScreenItem{..}) -> asItemAccountName
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                Nothing -> scr ^. asSelectedAccount
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    ui = ui0{aScreen=scr & asSelectedAccount .~ selacct}
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  case mode of
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    Minibuffer ed ->
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      case ev of
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        VtyEvent (EvKey KEsc   []) -> continue $ closeMinibuffer ui
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        VtyEvent (EvKey KEnter []) -> continue $ regenerateScreens j d $ setFilter s $ closeMinibuffer ui
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                            where s = chomp $ unlines $ map strip $ getEditContents ed
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        VtyEvent ev        -> do ed' <- handleEditorEvent ev ed
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                                 continue $ ui{aMode=Minibuffer ed'}
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        AppEvent _        -> continue ui
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        MouseDown _ _ _ _ -> continue ui
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        MouseUp _ _ _     -> continue ui
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    Help ->
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      case ev of
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        VtyEvent (EvKey (KChar 'q') []) -> halt ui
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        _                    -> helpHandle ui ev
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    Normal ->
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      case ev of
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        VtyEvent (EvKey (KChar 'q') []) -> halt ui
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        -- EvKey (KChar 'l') [MCtrl] -> do
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        VtyEvent (EvKey KEsc        []) -> continue $ resetScreens d ui
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        VtyEvent (EvKey (KChar c)   []) | c `elem` ['?'] -> continue $ setMode Help ui
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        -- XXX AppEvents currently handled only in Normal mode
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        -- XXX be sure we don't leave unconsumed events piling up
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        AppEvent (DateChange old _) | isStandardPeriod p && p `periodContainsDate` old ->
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          continue $ regenerateScreens j d $ setReportPeriod (DayPeriod d) ui
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          where
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            p = reportPeriod ui
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        e | e `elem` [VtyEvent (EvKey (KChar 'g') []), AppEvent FileChange] ->
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          liftIO (uiReloadJournal copts d ui) >>= continue
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        VtyEvent (EvKey (KChar 'I') []) -> continue $ uiCheckBalanceAssertions d (toggleIgnoreBalanceAssertions ui)
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        VtyEvent (EvKey (KChar 'a') []) -> suspendAndResume $ clearScreen >> setCursorPosition 0 0 >> add copts j >> uiReloadJournalIfChanged copts d j ui
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        VtyEvent (EvKey (KChar 'A') []) -> suspendAndResume $ void (runIadd (journalFilePath j)) >> uiReloadJournalIfChanged copts d j ui
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        VtyEvent (EvKey (KChar 'E') []) -> suspendAndResume $ void (runEditor endPos (journalFilePath j)) >> uiReloadJournalIfChanged copts d j ui
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        VtyEvent (EvKey (KChar '0') []) -> continue $ regenerateScreens j d $ setDepth (Just 0) ui
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        VtyEvent (EvKey (KChar '1') []) -> continue $ regenerateScreens j d $ setDepth (Just 1) ui
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        VtyEvent (EvKey (KChar '2') []) -> continue $ regenerateScreens j d $ setDepth (Just 2) ui
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        VtyEvent (EvKey (KChar '3') []) -> continue $ regenerateScreens j d $ setDepth (Just 3) ui
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        VtyEvent (EvKey (KChar '4') []) -> continue $ regenerateScreens j d $ setDepth (Just 4) ui
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        VtyEvent (EvKey (KChar '5') []) -> continue $ regenerateScreens j d $ setDepth (Just 5) ui
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        VtyEvent (EvKey (KChar '6') []) -> continue $ regenerateScreens j d $ setDepth (Just 6) ui
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        VtyEvent (EvKey (KChar '7') []) -> continue $ regenerateScreens j d $ setDepth (Just 7) ui
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        VtyEvent (EvKey (KChar '8') []) -> continue $ regenerateScreens j d $ setDepth (Just 8) ui
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        VtyEvent (EvKey (KChar '9') []) -> continue $ regenerateScreens j d $ setDepth (Just 9) ui
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        VtyEvent (EvKey (KChar '-') []) -> continue $ regenerateScreens j d $ decDepth ui
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        VtyEvent (EvKey (KChar '_') []) -> continue $ regenerateScreens j d $ decDepth ui
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        VtyEvent (EvKey (KChar c)   []) | c `elem` ['+','='] -> continue $ regenerateScreens j d $ incDepth ui
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        VtyEvent (EvKey (KChar 't') [])    -> continue $ regenerateScreens j d $ setReportPeriod (DayPeriod d) ui
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        -- display mode/query toggles
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        VtyEvent (EvKey (KChar 'H') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleHistorical ui
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        VtyEvent (EvKey (KChar 'T') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleTree ui
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        VtyEvent (EvKey (KChar 'Z') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleEmpty ui
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        VtyEvent (EvKey (KChar 'R') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleReal ui
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        VtyEvent (EvKey (KChar 'U') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleUnmarked ui
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        VtyEvent (EvKey (KChar 'P') []) -> asCenterAndContinue $ regenerateScreens j d $ togglePending ui
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        VtyEvent (EvKey (KChar 'C') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleCleared ui
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        VtyEvent (EvKey (KChar 'F') []) -> asCenterAndContinue $ regenerateScreens j d $ toggleFuture ui
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        VtyEvent (EvKey (KDown)     [MShift]) -> continue $ regenerateScreens j d $ shrinkReportPeriod d ui
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        VtyEvent (EvKey (KUp)       [MShift]) -> continue $ regenerateScreens j d $ growReportPeriod d ui
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        VtyEvent (EvKey (KRight)    [MShift]) -> continue $ regenerateScreens j d $ nextReportPeriod journalspan ui
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        VtyEvent (EvKey (KLeft)     [MShift]) -> continue $ regenerateScreens j d $ previousReportPeriod journalspan ui
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        VtyEvent (EvKey (KChar '/') []) -> continue $ regenerateScreens j d $ showMinibuffer ui
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        VtyEvent (EvKey k           []) | k `elem` [KBS, KDel] -> (continue $ regenerateScreens j d $ resetFilter ui)
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        VtyEvent e | e `elem` moveLeftEvents -> continue $ popScreen ui
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        VtyEvent (EvKey (KChar 'l') [MCtrl]) -> scrollSelectionToMiddle _asList >> invalidateCache >> continue ui
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        -- enter register screen for selected account (if there is one), 
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        -- centering its selected transaction if possible
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        VtyEvent e | e `elem` moveRightEvents 
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                   , not $ isBlankElement $ listSelectedElement _asList->
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          -- TODO center selection after entering register screen; neither of these works till second time entering; easy strictifications didn't help 
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          rsCenterAndContinue $  
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          -- flip rsHandle (VtyEvent (EvKey (KChar 'l') [MCtrl])) $
 | 
						|
            screenEnter d regscr ui 
 | 
						|
          where
 | 
						|
            regscr = rsSetAccount selacct isdepthclipped registerScreen
 | 
						|
            isdepthclipped = case getDepth ui of
 | 
						|
                                Just d  -> accountNameLevel selacct >= d
 | 
						|
                                Nothing -> False
 | 
						|
 | 
						|
        -- prevent moving down over blank padding items;
 | 
						|
        -- instead scroll down by one, until maximally scrolled - shows the end has been reached
 | 
						|
        VtyEvent (EvKey (KDown)     []) | isBlankElement mnextelement -> do
 | 
						|
          vScrollBy (viewportScroll $ _asList^.listNameL) 1 
 | 
						|
          continue ui
 | 
						|
          where 
 | 
						|
            mnextelement = listSelectedElement $ listMoveDown _asList
 | 
						|
 | 
						|
        -- if page down or end leads to a blank padding item, stop at last non-blank
 | 
						|
        VtyEvent e@(EvKey k           []) | k `elem` [KPageDown, KEnd] -> do
 | 
						|
          list <- handleListEvent e _asList
 | 
						|
          if isBlankElement $ listSelectedElement list
 | 
						|
          then do
 | 
						|
            let list' = listMoveTo lastnonblankidx list
 | 
						|
            scrollSelectionToMiddle list'
 | 
						|
            continue ui{aScreen=scr{_asList=list'}}
 | 
						|
          else
 | 
						|
            continue ui{aScreen=scr{_asList=list}}
 | 
						|
          
 | 
						|
        -- fall through to the list's event handler (handles up/down)
 | 
						|
        VtyEvent ev -> do
 | 
						|
          newitems <- handleListEvent (normaliseMovementKeys ev) _asList
 | 
						|
          continue $ ui{aScreen=scr & asList .~ newitems
 | 
						|
                                    & asSelectedAccount .~ selacct
 | 
						|
                                    }
 | 
						|
 | 
						|
        AppEvent _        -> continue ui
 | 
						|
        MouseDown _ _ _ _ -> continue ui
 | 
						|
        MouseUp _ _ _     -> continue ui
 | 
						|
 | 
						|
  where
 | 
						|
    journalspan = journalDateSpan False j
 | 
						|
 | 
						|
asHandle _ _ = error "event handler called with wrong screen type, should not happen"
 | 
						|
 | 
						|
asSetSelectedAccount a s@AccountsScreen{} = s & asSelectedAccount .~ a
 | 
						|
asSetSelectedAccount _ s = s
 | 
						|
 | 
						|
isBlankElement mel = ((asItemAccountName . snd) <$> mel) == Just "" 
 | 
						|
 | 
						|
asCenterAndContinue ui = do
 | 
						|
  scrollSelectionToMiddle $ _asList $ aScreen ui
 | 
						|
  continue ui
 |