321 lines
12 KiB
Haskell
321 lines
12 KiB
Haskell
{- | UIState operations. -}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE OverloadedStrings #-}
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module Hledger.UI.UIState
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where
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import Brick.Widgets.Edit
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import Data.Bifunctor (first)
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import Data.Foldable (asum)
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import Data.Either (fromRight)
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import Data.List ((\\), foldl', sort)
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import Data.Maybe (fromMaybe)
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import Data.Semigroup (Max(..))
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import qualified Data.Text as T
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import Data.Text.Zipper (gotoEOL)
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import Data.Time.Calendar (Day)
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import Lens.Micro ((^.), over, set)
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import Hledger
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import Hledger.Cli.CliOptions
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import Hledger.UI.UITypes
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-- | Toggle between showing only unmarked items or all items.
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toggleUnmarked :: UIState -> UIState
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toggleUnmarked = over statuses (toggleStatus1 Unmarked)
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-- | Toggle between showing only pending items or all items.
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togglePending :: UIState -> UIState
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togglePending = over statuses (toggleStatus1 Pending)
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-- | Toggle between showing only cleared items or all items.
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toggleCleared :: UIState -> UIState
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toggleCleared = over statuses (toggleStatus1 Cleared)
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-- TODO testing different status toggle styles
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-- | Generate zero or more indicators of the status filters currently active,
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-- which will be shown comma-separated as part of the indicators list.
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uiShowStatus :: CliOpts -> [Status] -> [String]
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uiShowStatus copts ss =
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case style of
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-- in style 2, instead of "Y, Z" show "not X"
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Just 2 | length ss == numstatuses-1
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-> map (("not "++). showstatus) $ sort $ complement ss -- should be just one
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_ -> map showstatus $ sort ss
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where
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numstatuses = length [minBound..maxBound::Status]
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style = maybeposintopt "status-toggles" $ rawopts_ copts
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showstatus Cleared = "cleared"
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showstatus Pending = "pending"
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showstatus Unmarked = "unmarked"
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-- various toggle behaviours:
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-- 1 UPC toggles only X/all
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toggleStatus1 :: Status -> [Status] -> [Status]
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toggleStatus1 s ss = if ss == [s] then [] else [s]
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-- 2 UPC cycles X/not-X/all
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-- repeatedly pressing X cycles:
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-- [] U [u]
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-- [u] U [pc]
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-- [pc] U []
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-- pressing Y after first or second step starts new cycle:
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-- [u] P [p]
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-- [pc] P [p]
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-- toggleStatus2 s ss
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-- | ss == [s] = complement [s]
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-- | ss == complement [s] = []
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-- | otherwise = [s] -- XXX assume only three values
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-- 3 UPC toggles each X
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-- toggleStatus3 s ss
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-- | s `elem` ss = filter (/= s) ss
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-- | otherwise = simplifyStatuses (s:ss)
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-- 4 upc sets X, UPC sets not-X
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-- toggleStatus4 s ss
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-- | s `elem` ss = filter (/= s) ss
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-- | otherwise = simplifyStatuses (s:ss)
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-- 5 upc toggles X, UPC toggles not-X
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-- toggleStatus5 s ss
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-- | s `elem` ss = filter (/= s) ss
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-- | otherwise = simplifyStatuses (s:ss)
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-- | Given a list of unique enum values, list the other possible values of that enum.
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complement :: (Bounded a, Enum a, Eq a) => [a] -> [a]
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complement = ([minBound..maxBound] \\)
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--
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-- | Toggle between showing all and showing only nonempty (more precisely, nonzero) items.
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toggleEmpty :: UIState -> UIState
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toggleEmpty = over empty__ not
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-- | Toggle between showing the primary amounts or costs.
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toggleConversionOp :: UIState -> UIState
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toggleConversionOp = over conversionop toggleCostMode
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where
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toggleCostMode Nothing = Just ToCost
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toggleCostMode (Just NoConversionOp) = Just ToCost
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toggleCostMode (Just ToCost) = Just NoConversionOp
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-- | Toggle between showing primary amounts or default valuation.
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toggleValue :: UIState -> UIState
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toggleValue = over value valuationToggleValue
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where
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-- | Basic toggling of -V, for hledger-ui.
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valuationToggleValue (Just (AtEnd _)) = Nothing
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valuationToggleValue _ = Just $ AtEnd Nothing
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-- | Set hierarchic account tree mode.
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setTree :: UIState -> UIState
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setTree = set accountlistmode ALTree
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-- | Set flat account list mode.
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setList :: UIState -> UIState
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setList = set accountlistmode ALFlat
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-- | Toggle between flat and tree mode. If current mode is unspecified/default, assume it's flat.
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toggleTree :: UIState -> UIState
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toggleTree = over accountlistmode toggleTreeMode
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where
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toggleTreeMode ALTree = ALFlat
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toggleTreeMode ALFlat = ALTree
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-- | Toggle between historical balances and period balances.
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toggleHistorical :: UIState -> UIState
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toggleHistorical = over balanceaccum toggleBalanceAccum
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where
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toggleBalanceAccum Historical = PerPeriod
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toggleBalanceAccum _ = Historical
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-- | Toggle hledger-ui's "forecast/future mode". When this mode is enabled,
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-- hledger-shows regular transactions which have future dates, and
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-- "forecast" transactions generated by periodic transaction rules
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-- (which are usually but not necessarily future-dated).
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-- In normal mode, both of these are hidden.
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toggleForecast :: Day -> UIState -> UIState
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toggleForecast _d ui = set forecast newForecast ui
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where
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newForecast = case ui^.forecast of
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Just _ -> Nothing
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Nothing -> enableForecastPreservingPeriod ui (ui^.cliOpts) ^. forecast
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-- | Ensure this CliOpts enables forecasted transactions.
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-- If a forecast period was specified in the old CliOpts,
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-- or in the provided UIState's startup options,
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-- it is preserved.
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enableForecastPreservingPeriod :: UIState -> CliOpts -> CliOpts
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enableForecastPreservingPeriod ui copts = set forecast mforecast copts
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where
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mforecast = asum [mprovidedforecastperiod, mstartupforecastperiod, mdefaultforecastperiod]
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where
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mprovidedforecastperiod = copts ^. forecast
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mstartupforecastperiod = astartupopts ui ^. forecast
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mdefaultforecastperiod = Just nulldatespan
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-- | Toggle between showing all and showing only real (non-virtual) items.
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toggleReal :: UIState -> UIState
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toggleReal = fromRight err . overEither real not -- PARTIAL:
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where err = error "toggleReal: updating Real should not result in an error"
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-- | Toggle the ignoring of balance assertions.
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toggleIgnoreBalanceAssertions :: UIState -> UIState
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toggleIgnoreBalanceAssertions = over ignore_assertions not
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-- | Step through larger report periods, up to all.
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growReportPeriod :: Day -> UIState -> UIState
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growReportPeriod _d = updateReportPeriod periodGrow
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-- | Step through smaller report periods, down to a day.
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shrinkReportPeriod :: Day -> UIState -> UIState
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shrinkReportPeriod d = updateReportPeriod (periodShrink d)
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-- | Step the report start/end dates to the next period of same duration,
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-- remaining inside the given enclosing span.
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nextReportPeriod :: DateSpan -> UIState -> UIState
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nextReportPeriod enclosingspan = updateReportPeriod (periodNextIn enclosingspan)
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-- | Step the report start/end dates to the next period of same duration,
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-- remaining inside the given enclosing span.
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previousReportPeriod :: DateSpan -> UIState -> UIState
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previousReportPeriod enclosingspan = updateReportPeriod (periodPreviousIn enclosingspan)
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-- | If a standard report period is set, step it forward/backward if needed so that
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-- it encloses the given date.
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moveReportPeriodToDate :: Day -> UIState -> UIState
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moveReportPeriodToDate d = updateReportPeriod (periodMoveTo d)
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-- | Clear any report period limits.
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resetReportPeriod :: UIState -> UIState
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resetReportPeriod = setReportPeriod PeriodAll
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-- | Get the report period.
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reportPeriod :: UIState -> Period
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reportPeriod = (^.period)
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-- | Set the report period.
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setReportPeriod :: Period -> UIState -> UIState
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setReportPeriod p = updateReportPeriod (const p)
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-- | Update report period by a applying a function.
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updateReportPeriod :: (Period -> Period) -> UIState -> UIState
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updateReportPeriod updatePeriod = fromRight err . overEither period updatePeriod -- PARTIAL:
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where err = error "updateReportPeriod: updating period should not result in an error"
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-- | Apply a new filter query, or return the failing query.
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setFilter :: String -> UIState -> Either String UIState
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setFilter s = first (const s) . setEither querystring (words'' prefixes $ T.pack s)
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-- | Reset some filters & toggles.
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resetFilter :: UIState -> UIState
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resetFilter = set querystringNoUpdate [] . set realNoUpdate False . set statusesNoUpdate []
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. set empty__ True -- set period PeriodAll
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. set rsQuery Any . set rsQueryOpts []
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-- | Reset all options state to exactly what it was at startup
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-- (preserving any command-line options/arguments).
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resetOpts :: UIState -> UIState
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resetOpts ui@UIState{astartupopts} = ui{aopts=astartupopts}
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resetDepth :: UIState -> UIState
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resetDepth = updateReportDepth (const Nothing)
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-- | Get the maximum account depth in the current journal.
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maxDepth :: UIState -> Int
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maxDepth UIState{ajournal=j} = getMax . foldMap (Max . accountNameLevel) $ journalAccountNamesDeclaredOrImplied j
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-- | Decrement the current depth limit towards 0. If there was no depth limit,
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-- set it to one less than the maximum account depth.
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decDepth :: UIState -> UIState
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decDepth ui = updateReportDepth dec ui
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where
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dec (Just d) = Just $ max 0 (d-1)
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dec Nothing = Just $ maxDepth ui - 1
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-- | Increment the current depth limit. If this makes it equal to the
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-- the maximum account depth, remove the depth limit.
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incDepth :: UIState -> UIState
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incDepth = updateReportDepth (fmap succ)
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-- | Set the current depth limit to the specified depth, or remove the depth limit.
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-- Also remove the depth limit if the specified depth is greater than the current
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-- maximum account depth. If the specified depth is negative, reset the depth limit
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-- to whatever was specified at uiartup.
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setDepth :: Maybe Int -> UIState -> UIState
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setDepth mdepth = updateReportDepth (const mdepth)
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getDepth :: UIState -> Maybe Int
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getDepth = (^.depth)
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-- | Update report depth by a applying a function. If asked to set a depth less
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-- than zero, it will leave it unchanged.
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updateReportDepth :: (Maybe Int -> Maybe Int) -> UIState -> UIState
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updateReportDepth updateDepth ui = over reportSpec update ui
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where
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update = fromRight (error "updateReportDepth: updating depth should not result in an error") -- PARTIAL:
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. updateReportSpecWith (\ropts -> ropts{depth_=updateDepth (depth_ ropts) >>= clipDepth ropts})
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clipDepth ropts d | d < 0 = depth_ ropts
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| d >= maxDepth ui = Nothing
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| otherwise = Just d
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-- | Open the minibuffer, setting its content to the current query with the cursor at the end.
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showMinibuffer :: T.Text -> Maybe String -> UIState -> UIState
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showMinibuffer label moldq ui = setMode (Minibuffer label e) ui
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where
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e = applyEdit gotoEOL $ editor MinibufferEditor (Just 1) oldq
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oldq = fromMaybe (T.unpack . T.unwords . map textQuoteIfNeeded $ ui^.querystring) moldq
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-- | Close the minibuffer, discarding any edit in progress.
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closeMinibuffer :: UIState -> UIState
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closeMinibuffer = setMode Normal
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setMode :: Mode -> UIState -> UIState
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setMode m ui = ui{aMode=m}
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-- | Regenerate the content for the current and previous screens, from a new journal and current date.
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regenerateScreens :: Journal -> Day -> UIState -> UIState
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regenerateScreens j d ui@UIState{aScreen=s,aPrevScreens=ss} =
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-- XXX clumsy due to entanglement of UIState and Screen.
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-- sInit operates only on an appstate's current screen, so
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-- remove all the screens from the appstate and then add them back
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-- one at a time, regenerating as we go.
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let
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first:rest = reverse $ s:ss :: [Screen]
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ui0 = ui{ajournal=j, aScreen=first, aPrevScreens=[]} :: UIState
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ui1 = (sInit first) d False ui0 :: UIState
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ui2 = foldl' (\ui s -> (sInit s) d False $ pushScreen s ui) ui1 rest :: UIState
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in
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ui2
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pushScreen :: Screen -> UIState -> UIState
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pushScreen scr ui = ui{aPrevScreens=(aScreen ui:aPrevScreens ui)
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,aScreen=scr
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}
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popScreen :: UIState -> UIState
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popScreen ui@UIState{aPrevScreens=s:ss} = ui{aScreen=s, aPrevScreens=ss}
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popScreen ui = ui
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resetScreens :: Day -> UIState -> UIState
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resetScreens d ui@UIState{aScreen=s,aPrevScreens=ss} =
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(sInit topscreen) d True $
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resetOpts $
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closeMinibuffer ui{aScreen=topscreen, aPrevScreens=[]}
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where
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topscreen = case ss of _:_ -> last ss
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[] -> s
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-- | Enter a new screen, saving the old screen & state in the
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-- navigation history and initialising the new screen's state.
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screenEnter :: Day -> Screen -> UIState -> UIState
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screenEnter d scr ui = (sInit scr) d True $
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pushScreen scr
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ui
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