319 lines
12 KiB
Haskell
319 lines
12 KiB
Haskell
{- | Rendering & misc. helpers. -}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE CPP #-}
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module Hledger.UI.UIUtils (
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borderDepthStr
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,borderKeysStr
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,borderKeysStr'
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,borderPeriodStr
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,borderQueryStr
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,defaultLayout
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,helpDialog
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,helpHandle
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,minibuffer
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,moveDownEvents
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,moveLeftEvents
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,moveRightEvents
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,moveUpEvents
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,normaliseMovementKeys
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,renderToggle
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,replaceHiddenAccountsNameWith
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,scrollSelectionToMiddle
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)
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where
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import Brick
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import Brick.Widgets.Border
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import Brick.Widgets.Border.Style
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import Brick.Widgets.Dialog
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import Brick.Widgets.Edit
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import Brick.Widgets.List hiding (reverse)
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import Control.Monad.IO.Class
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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 Graphics.Vty (Event(..),Key(..),Modifier(..),Color,Attr,currentAttr)
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import Lens.Micro.Platform
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import System.Environment
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import Hledger hiding (Color)
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import Hledger.Cli (CliOpts)
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import Hledger.Cli.DocFiles
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import Hledger.UI.UITypes
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import Hledger.UI.UIState
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-- ui
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-- | Wrap a widget in the default hledger-ui screen layout.
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defaultLayout :: Widget Name -> Widget Name -> Widget Name -> Widget Name
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defaultLayout toplabel bottomlabel =
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topBottomBorderWithLabels (str " "<+>toplabel<+>str " ") (str " "<+>bottomlabel<+>str " ") .
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margin 1 0 Nothing
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-- topBottomBorderWithLabel2 label .
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-- padLeftRight 1 -- XXX should reduce inner widget's width by 2, but doesn't
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-- "the layout adjusts... if you use the core combinators"
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-- | Draw the help dialog, called when help mode is active.
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helpDialog :: CliOpts -> Widget Name
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helpDialog _copts =
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Widget Fixed Fixed $ do
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c <- getContext
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render $
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withDefAttr "help" $
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renderDialog (dialog (Just "Help (?/LEFT/ESC to close)") Nothing (c^.availWidthL)) $ -- (Just (0,[("ok",())]))
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padAll 1 $
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vBox [
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hBox [
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padRight (Pad 1) $
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vBox [
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withAttr ("help" <> "heading") $ str "Navigation"
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,renderKey ("UP/DOWN/PUP/PDN/HOME/END/emacs/vi keys", "")
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,str " move selection"
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,renderKey ("RIGHT", "show account txns, txn detail")
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,renderKey ("LEFT ", "go back")
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,renderKey ("ESC ", "cancel or reset")
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,str " "
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,withAttr ("help" <> "heading") $ str "Report period"
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,renderKey ("S-DOWN /S-UP ", "shrink/grow period")
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,renderKey ("S-RIGHT/S-LEFT", "next/previous period")
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,renderKey ("t ", "set period to today")
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,str " "
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,withAttr ("help" <> "heading") $ str "Accounts screen"
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,renderKey ("-+0123456789 ", "set depth limit")
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,renderKey ("T ", "toggle tree/flat mode")
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,renderKey ("H ", "historical end balance/period change")
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,str " "
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,withAttr ("help" <> "heading") $ str "Register screen"
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,renderKey ("T ", "toggle subaccount txns\n(and accounts screen tree/flat mode)")
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,renderKey ("H ", "show historical total/period total")
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,str " "
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]
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,padLeft (Pad 1) $ padRight (Pad 0) $
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vBox [
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withAttr ("help" <> "heading") $ str "Filtering"
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,renderKey ("/ ", "set a filter query")
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,renderKey ("UPC ", "show unmarked/pending/cleared")
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,renderKey ("F ", "show future/present txns")
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,renderKey ("R ", "show real/all postings")
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,renderKey ("Z ", "show nonzero/all amounts")
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,renderKey ("DEL ", "remove filters")
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,str " "
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,withAttr ("help" <> "heading") $ str "Help"
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,renderKey ("? ", "toggle this help")
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,renderKey ("pmi ", "(with this help open)\nshow manual in pager/man/info")
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,str " "
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,withAttr ("help" <> "heading") $ str "Other"
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,renderKey ("a ", "add transaction (hledger add)")
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,renderKey ("A ", "add transaction (hledger-iadd)")
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,renderKey ("E ", "open editor")
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,renderKey ("I ", "toggle balance assertions")
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,renderKey ("C-l ", "redraw & recenter")
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,renderKey ("g ", "reload data")
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,renderKey ("q ", "quit")
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]
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]
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-- ,vBox [
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-- str " "
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-- ,hCenter $ padLeftRight 1 $
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-- hCenter (str "MANUAL")
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-- <=>
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-- hCenter (hBox [
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-- renderKey ("t", "text")
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-- ,str " "
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-- ,renderKey ("m", "man page")
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-- ,str " "
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-- ,renderKey ("i", "info")
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-- ])
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-- ]
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]
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where
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renderKey (key,desc) = withAttr ("help" <> "key") (str key) <+> str " " <+> str desc
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-- | Event handler used when help mode is active.
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-- May invoke $PAGER, less, man or info, which is likely to fail on MS Windows, TODO.
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helpHandle :: UIState -> BrickEvent Name AppEvent -> EventM Name (Next UIState)
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helpHandle ui ev = do
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pagerprog <- liftIO $ fromMaybe "less" <$> lookupEnv "PAGER"
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case ev of
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VtyEvent e | e `elem` (moveLeftEvents ++ [EvKey KEsc [], EvKey (KChar '?') []]) -> continue $ setMode Normal ui
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VtyEvent (EvKey (KChar 'p') []) -> suspendAndResume $ runPagerForTopic pagerprog "hledger-ui" >> return ui'
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VtyEvent (EvKey (KChar 'm') []) -> suspendAndResume $ runManForTopic "hledger-ui" >> return ui'
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VtyEvent (EvKey (KChar 'i') []) -> suspendAndResume $ runInfoForTopic "hledger-ui" >> return ui'
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_ -> continue ui
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where
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ui' = setMode Normal ui
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-- | Draw the minibuffer.
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minibuffer :: Editor String Name -> Widget Name
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minibuffer ed =
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forceAttr ("border" <> "minibuffer") $
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hBox $
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#if MIN_VERSION_brick(0,19,0)
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[txt "filter: ", renderEditor (str . unlines) True ed]
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#else
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[txt "filter: ", renderEditor True ed]
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#endif
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borderQueryStr :: String -> Widget Name
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borderQueryStr "" = str ""
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borderQueryStr qry = str " matching " <+> withAttr ("border" <> "query") (str qry)
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borderDepthStr :: Maybe Int -> Widget Name
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borderDepthStr Nothing = str ""
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borderDepthStr (Just d) = str " to " <+> withAttr ("border" <> "query") (str $ "depth "++show d)
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borderPeriodStr :: String -> Period -> Widget Name
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borderPeriodStr _ PeriodAll = str ""
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borderPeriodStr preposition p = str (" "++preposition++" ") <+> withAttr ("border" <> "query") (str $ showPeriod p)
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borderKeysStr :: [(String,String)] -> Widget Name
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borderKeysStr = borderKeysStr' . map (\(a,b) -> (a, str b))
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borderKeysStr' :: [(String,Widget Name)] -> Widget Name
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borderKeysStr' keydescs =
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hBox $
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intersperse sep $
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[withAttr ("border" <> "key") (str keys) <+> str ":" <+> desc | (keys, desc) <- keydescs]
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where
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-- sep = str " | "
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sep = str " "
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-- | Render the two states of a toggle, highlighting the active one.
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renderToggle :: Bool -> String -> String -> Widget Name
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renderToggle isright l r =
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let bold = withAttr ("border" <> "selected") in
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if isright
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then str (l++"/") <+> bold (str r)
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else bold (str l) <+> str ("/"++r)
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-- temporary shenanigans:
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-- | Convert the special account name "*" (from balance report with depth limit 0) to something clearer.
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replaceHiddenAccountsNameWith :: AccountName -> AccountName -> AccountName
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replaceHiddenAccountsNameWith anew a | a == hiddenAccountsName = anew
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| a == "*" = anew
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| otherwise = a
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hiddenAccountsName = "..." -- for now
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-- generic
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--topBottomBorderWithLabel :: Widget Name -> Widget Name -> Widget Name
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--topBottomBorderWithLabel label = \wrapped ->
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-- Widget Greedy Greedy $ do
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-- c <- getContext
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-- let (_w,h) = (c^.availWidthL, c^.availHeightL)
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-- h' = h - 2
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-- wrapped' = vLimit (h') wrapped
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-- debugmsg =
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-- ""
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-- -- " debug: "++show (_w,h')
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-- render $
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-- hBorderWithLabel (label <+> str debugmsg)
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-- <=>
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-- wrapped'
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-- <=>
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-- hBorder
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topBottomBorderWithLabels :: Widget Name -> Widget Name -> Widget Name -> Widget Name
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topBottomBorderWithLabels toplabel bottomlabel body =
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Widget Greedy Greedy $ do
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c <- getContext
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let (_w,h) = (c^.availWidthL, c^.availHeightL)
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h' = h - 2
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body' = vLimit (h') body
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debugmsg =
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""
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-- " debug: "++show (_w,h')
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render $
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hBorderWithLabel (withAttr "border" $ toplabel <+> str debugmsg)
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<=>
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body'
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<=>
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hBorderWithLabel (withAttr "border" bottomlabel)
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---- XXX should be equivalent to the above, but isn't (page down goes offscreen)
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--_topBottomBorderWithLabel2 :: Widget Name -> Widget Name -> Widget Name
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--_topBottomBorderWithLabel2 label = \wrapped ->
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-- let debugmsg = ""
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-- in hBorderWithLabel (label <+> str debugmsg)
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-- <=>
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-- wrapped
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-- <=>
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-- hBorder
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-- XXX superseded by pad, in theory
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-- | Wrap a widget in a margin with the given horizontal and vertical
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-- thickness, using the current background colour or the specified
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-- colour.
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-- XXX May disrupt border style of inner widgets.
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-- XXX Should reduce the available size visible to inner widget, but doesn't seem to (cf rsDraw2).
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margin :: Int -> Int -> Maybe Color -> Widget Name -> Widget Name
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margin h v mcolour = \w ->
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Widget Greedy Greedy $ do
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c <- getContext
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let w' = vLimit (c^.availHeightL - v*2) $ hLimit (c^.availWidthL - h*2) w
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attr = maybe currentAttr (\c -> c `on` c) mcolour
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render $
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withBorderAttr attr $
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withBorderStyle (borderStyleFromChar ' ') $
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applyN v (hBorder <=>) $
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applyN h (vBorder <+>) $
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applyN v (<=> hBorder) $
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applyN h (<+> vBorder) $
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w'
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-- withBorderAttr attr .
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-- withBorderStyle (borderStyleFromChar ' ') .
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-- applyN n border
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withBorderAttr :: Attr -> Widget Name -> Widget Name
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withBorderAttr attr = updateAttrMap (applyAttrMappings [("border", attr)])
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---- | Like brick's continue, but first run some action to modify brick's state.
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---- This action does not affect the app state, but might eg adjust a widget's scroll position.
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--continueWith :: EventM n () -> ui -> EventM n (Next ui)
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--continueWith brickaction ui = brickaction >> continue ui
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---- | Scroll a list's viewport so that the selected item is at the top
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---- of the display area.
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--scrollToTop :: List Name e -> EventM Name ()
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--scrollToTop list = do
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-- let vpname = list^.listNameL
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-- setTop (viewportScroll vpname) 0
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-- | Scroll a list's viewport so that the selected item is centered in the
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-- middle of the display area.
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scrollSelectionToMiddle :: List Name e -> EventM Name ()
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scrollSelectionToMiddle list = do
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let mselectedrow = list^.listSelectedL
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vpname = list^.listNameL
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mvp <- lookupViewport vpname
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case (mselectedrow, mvp) of
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(Just selectedrow, Just vp) -> do
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let
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itemheight = dbg4 "itemheight" $ list^.listItemHeightL
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vpheight = dbg4 "vpheight" $ vp^.vpSize._2
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itemsperpage = dbg4 "itemsperpage" $ vpheight `div` itemheight
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toprow = dbg4 "toprow" $ max 0 (selectedrow - (itemsperpage `div` 2)) -- assuming ViewportScroll's row offset is measured in list items not screen rows
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setTop (viewportScroll vpname) toprow
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_ -> return ()
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-- arrow keys vi keys emacs keys
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moveUpEvents = [EvKey KUp [] , EvKey (KChar 'k') [], EvKey (KChar 'p') [MCtrl]]
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moveDownEvents = [EvKey KDown [] , EvKey (KChar 'j') [], EvKey (KChar 'n') [MCtrl]]
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moveLeftEvents = [EvKey KLeft [] , EvKey (KChar 'h') [], EvKey (KChar 'b') [MCtrl]]
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moveRightEvents = [EvKey KRight [], EvKey (KChar 'l') [], EvKey (KChar 'f') [MCtrl]]
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normaliseMovementKeys ev
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| ev `elem` moveUpEvents = EvKey KUp []
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| ev `elem` moveDownEvents = EvKey KDown []
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| ev `elem` moveLeftEvents = EvKey KLeft []
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| ev `elem` moveRightEvents = EvKey KRight []
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| otherwise = ev
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