988c164ec8
Hledger.Utils.Debug's "trace or log" functions are now controlled as follows: to enable logging, append ",logging" to the program name at startup (using withProgName). This also works when running in GHCI. And they log to PROGNAME.log, not debug.log. All (hopefully) debug logging in the hledger packages is now "trace or log" capable. This means that hledger-ui should now log all debug output to ./hledger-ui.log, with none of it appearing on the console.
496 lines
20 KiB
Haskell
496 lines
20 KiB
Haskell
{- | Rendering & misc. helpers. -}
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE LambdaCase #-}
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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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,renderToggle1
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,replaceHiddenAccountsNameWith
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,scrollSelectionToMiddle
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,get'
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,put'
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,modify'
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,suspend
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,redraw
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,reportSpecAddQuery
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,reportSpecSetFutureAndForecast
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,listScrollPushingSelection
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,dbgui
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,dbguiEv
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,dbguiScreensEv
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,screenRegisterDescriptions
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,screenId
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,mapScreens
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,uiNumBlankItems
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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 (List, listSelectedL, listNameL, listItemHeightL, listSelected, listMoveDown, listMoveUp, GenericList, listElements)
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import Control.Monad.IO.Class
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import Data.Bifunctor (second)
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import Data.List
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import qualified Data.Text as T
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import Data.Time (addDays)
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import Graphics.Vty
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(Event(..),Key(..),Modifier(..),Vty(..),Color,Attr,currentAttr,refresh, displayBounds
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-- ,Output(displayBounds,mkDisplayContext),DisplayContext(..)
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)
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import Lens.Micro.Platform
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import Hledger
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-- import Hledger.Cli.CliOptions (CliOpts(reportspec_))
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import Hledger.Cli.DocFiles
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-- import Hledger.UI.UIOptions (UIOpts(uoCliOpts))
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import Hledger.UI.UITypes
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import Data.Vector (Vector)
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import qualified Data.Vector as V
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-- | On posix platforms, send the system STOP signal to suspend the
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-- current program. On windows, does nothing.
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-- (Though, currently hledger-ui is not built on windows.)
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#ifdef mingw32_HOST_OS
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suspendSignal :: IO ()
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suspendSignal = return ()
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#else
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import System.Posix.Signals
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suspendSignal :: IO ()
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suspendSignal = raiseSignal sigSTOP
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#endif
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-- Debug logging for UI state changes.
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-- A good place to log things of interest while debugging, see commented examples below.
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get' = do
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x <- get
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dbguiEv $ "getting state: " ++ (head $ lines $ pshow $ aScreen x)
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-- ++ " " ++ (show $ map tdescription $ jtxns $ ajournal x)
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-- dbguiEv $ ("query: "++) $ pshow' $ x & aopts & uoCliOpts & reportspec_ & _rsQuery
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-- dbguiScreensEv "getting" screenId x
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-- dbguiScreensEv "getting, with register descriptions" screenRegisterDescriptions x
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return x
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put' x = do
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dbguiEv $ "putting state: " ++ (head $ lines $ pshow $ aScreen x)
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-- ++ " " ++ (show $ map tdescription $ jtxns $ ajournal x)
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-- dbguiEv $ ("query: "++) $ pshow' $ x & aopts & uoCliOpts & reportspec_ & _rsQuery
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-- dbguiScreensEv "putting" screenId x
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-- dbguiScreensEv "putting, with register descriptions" screenRegisterDescriptions x
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put x
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modify' f = do
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x <- get
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let x' = f x
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dbguiEv $ "modifying state: " ++ (head $ lines $ pshow $ aScreen x')
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-- ++ " " ++ (show $ map tdescription $ jtxns $ ajournal x')
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-- dbguiEv $ ("from: "++) $ pshow' $ x & aopts & uoCliOpts & reportspec_ & _rsQuery
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-- dbguiEv $ ("to: "++) $ pshow' $ x' & aopts & uoCliOpts & reportspec_ & _rsQuery
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-- dbguiScreensEv "getting" screenId x
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-- dbguiScreensEv "putting" screenId x'
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-- dbguiScreensEv "getting, with register descriptions" screenRegisterDescriptions x
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-- dbguiScreensEv "putting, with register descriptions" screenRegisterDescriptions x'
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modify f
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-- | On posix platforms, suspend the program using the STOP signal,
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-- like control-z in bash, returning to the original shell prompt,
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-- and when resumed, continue where we left off.
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-- On windows, does nothing.
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suspend :: Ord a => s -> EventM a s ()
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suspend st = suspendAndResume $ suspendSignal >> return st
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-- | Tell vty to redraw the whole screen.
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redraw :: EventM a s ()
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redraw = getVtyHandle >>= liftIO . refresh
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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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-- topBottomBorderWithLabel 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 :: Widget Name
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helpDialog =
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Widget Fixed Fixed $ do
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c <- getContext
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render $
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withDefAttr (attrName "help") $
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renderDialog (dialog (Just "Help (LEFT/ESC/?/q to close help)") Nothing (c^.availWidthL)) $ -- (Just (0,[("ok",())]))
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padTop (Pad 0) $ padLeft (Pad 1) $ padRight (Pad 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 (attrName "help" <> attrName "heading") $ str "Navigation"
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,renderKey ("UP/DOWN/PUP/PDN/HOME/END/k/j/C-p/C-n", "")
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,str " move selection up/down"
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,renderKey ("RIGHT/l/C-f", "show txns, or txn detail")
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,renderKey ("LEFT/h/C-b ", "go back")
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,renderKey ("ESC ", "cancel, or reset app state")
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,str " "
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,withAttr (attrName "help" <> attrName "heading") $ str "Accounts screen"
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,renderKey ("1234567890-+ ", "set/adjust depth limit")
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,renderKey ("t ", "toggle accounts tree/list mode")
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,renderKey ("H ", "toggle historical balance/change")
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,str " "
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,withAttr (attrName "help" <> attrName "heading") $ str "Register screen"
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,renderKey ("t ", "toggle subaccount txns\n(and accounts tree/list mode)")
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,renderKey ("H ", "toggle historical/period total")
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,str " "
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,withAttr (attrName "help" <> attrName "heading") $ str "Help"
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,renderKey ("? ", "toggle this help")
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,renderKey ("p/m/i", "while help is open:\nshow manual in pager/man/info")
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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 (attrName "help" <> attrName "heading") $ str "Filtering"
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,renderKey ("/ ", "set a filter query")
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,renderKey ("F ", "show future & periodic 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 ("U/P/C ", "show unmarked/pending/cleared")
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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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,renderKey ("DEL ", "reset filters")
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,str " "
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,withAttr (attrName "help" <> attrName "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 ("B ", "show amounts/costs")
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,renderKey ("E ", "open editor")
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,renderKey ("I ", "toggle balance assertions")
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,renderKey ("V ", "show amounts/market values")
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,renderKey ("g ", "reload data")
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,renderKey ("C-l ", "redraw & recenter")
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,renderKey ("C-z ", "suspend")
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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 (attrName "help" <> attrName "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 :: BrickEvent Name AppEvent -> EventM Name UIState ()
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helpHandle ev = do
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ui <- get
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let ui' = ui{aMode=Normal}
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case ev of
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VtyEvent e | e `elem` closeHelpEvents -> put' ui'
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VtyEvent (EvKey (KChar 'p') []) -> suspendAndResume (runPagerForTopic "hledger-ui" Nothing >> return ui')
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VtyEvent (EvKey (KChar 'm') []) -> suspendAndResume (runManForTopic "hledger-ui" Nothing >> return ui')
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VtyEvent (EvKey (KChar 'i') []) -> suspendAndResume (runInfoForTopic "hledger-ui" Nothing >> return ui')
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_ -> return ()
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where
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closeHelpEvents = moveLeftEvents ++ [EvKey KEsc [], EvKey (KChar '?') [], EvKey (KChar 'q') []]
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-- | Draw the minibuffer with the given label.
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minibuffer :: T.Text -> Editor String Name -> Widget Name
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minibuffer string ed =
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forceAttr (attrName "border" <> attrName "minibuffer") $
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hBox [txt $ string <> ": ", renderEditor (str . unlines) True ed]
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borderQueryStr :: String -> Widget Name
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borderQueryStr "" = str ""
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borderQueryStr qry = str " matching " <+> withAttr (attrName "border" <> attrName "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 depth " <+> withAttr (attrName "border" <> attrName "query") (str $ 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 (attrName "border" <> attrName "query") (str . T.unpack $ showPeriod p)
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borderKeysStr :: [(String,String)] -> Widget Name
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borderKeysStr = borderKeysStr' . map (second str)
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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 (attrName "border" <> attrName "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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-- | Show both states of a toggle ("aaa/bbb"), 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 (attrName "border" <> attrName "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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-- | Show a toggle's label, highlighted (bold) when the toggle is active.
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renderToggle1 :: Bool -> String -> Widget Name
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renderToggle1 isactive l =
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let bold = withAttr (attrName "border" <> attrName "selected") in
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if isactive
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then bold (str l)
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else str l
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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 (attrName "border") $ toplabel <+> str debugmsg)
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<=>
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body'
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<=>
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hBorderWithLabel (withAttr (attrName "border") bottomlabel)
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---- XXX should be equivalent to the above, but isn't (page down goes offscreen)
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--_topBottomBorderWithLabel :: Widget Name -> Widget Name -> Widget Name
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--_topBottomBorderWithLabel 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 rsDraw).
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margin :: Int -> Int -> Maybe Color -> Widget Name -> Widget Name
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margin h v mcolour w = Widget Greedy Greedy $ do
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ctx <- getContext
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let w' = vLimit (ctx^.availHeightL - v*2) $ hLimit (ctx^.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 [(attrName "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 item -> EventM Name UIState ()
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scrollSelectionToMiddle list = do
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case list^.listSelectedL of
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Nothing -> return ()
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Just selectedrow -> do
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Vty{outputIface} <- getVtyHandle
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pageheight <- dbg4 "pageheight" . snd <$> liftIO (displayBounds outputIface)
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let
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itemheight = dbg4 "itemheight" $ list^.listItemHeightL
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itemsperpage = dbg4 "itemsperpage" $ pageheight `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 $ list^.listNameL) toprow
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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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-- | Restrict the ReportSpec's query by adding the given additional query.
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reportSpecAddQuery :: Query -> ReportSpec -> ReportSpec
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reportSpecAddQuery q rspec =
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rspec{_rsQuery=simplifyQuery $ And [_rsQuery rspec, q]}
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-- | Update the ReportSpec's query to exclude future transactions (later than its "today" date)
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-- and forecast transactions (generated by --forecast), if the given forecast DateSpan is Nothing,
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-- and include them otherwise.
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reportSpecSetFutureAndForecast :: Maybe DateSpan -> ReportSpec -> ReportSpec
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reportSpecSetFutureAndForecast fcast rspec =
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rspec{_rsQuery=simplifyQuery $ And [_rsQuery rspec, periodq, excludeforecastq fcast]}
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where
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periodq = Date . periodAsDateSpan . period_ $ _rsReportOpts rspec
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-- Except in forecast mode, exclude future/forecast transactions.
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excludeforecastq (Just _) = Any
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excludeforecastq Nothing = -- not:date:tomorrow- not:tag:generated-transaction
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And [
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Not (Date $ DateSpan (Just $ addDays 1 $ _rsDay rspec) Nothing)
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,Not generatedTransactionTag
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]
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-- Vertically scroll the named list's viewport with the given number of non-empty items
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-- by the given positive or negative number of items (usually 1 or -1).
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-- The selection will be moved when necessary to keep it visible and allow the scroll.
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listScrollPushingSelection :: Name -> Int -> Int -> EventM Name (List Name item) (GenericList Name Vector item)
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listScrollPushingSelection name listheight scrollamt = do
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list <- get
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viewportScroll name `vScrollBy` scrollamt
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mvp <- lookupViewport name
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case mvp of
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Just VP{_vpTop, _vpSize=(_,vpheight)} -> do
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let mselidx = listSelected list
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case mselidx of
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Just selidx -> return $ pushsel list
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where
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pushsel
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| scrollamt > 0, selidx <= _vpTop && selidx < (listheight-1) = listMoveDown
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| scrollamt < 0, selidx >= _vpTop + vpheight - 1 && selidx > 0 = listMoveUp
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| otherwise = id
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_ -> return list
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_ -> return list
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-- | A debug logging helper for hledger-ui code: at any debug level >= 1,
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-- logs the string to hledger-ui.log before returning the second argument.
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-- Uses unsafePerformIO.
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dbgui :: String -> a -> a
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dbgui = traceLogAt 1
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-- | Like dbgui, but convenient to use in EventM handlers.
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dbguiEv :: String -> EventM Name s ()
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dbguiEv s = dbgui s $ return ()
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-- | Like dbguiEv, but log a compact view of the current screen stack,
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-- adding the given postfix to the label (can be empty),
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-- from topmost screen to currently-viewed screen,
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-- with each screen rendered by the given rendering function.
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-- Useful for inspecting states across the whole screen stack.
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-- Some screen rendering functions are @screenId@ and @screenRegisterDescriptions@.
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-- To just show the stack: @dbguiScreensEv "" screenId ui@
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dbguiScreensEv :: String -> (Screen -> String) -> UIState -> EventM Name UIState ()
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dbguiScreensEv postfix showscr ui =
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dbguiEv $ concat [
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"screen stack"
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,if null postfix then "" else " (" ++ postfix ++ ")"
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,": "
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,unwords $ mapScreens showscr ui
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]
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-- | Run a function on each screen in a UIState's screen "stack",
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-- from topmost screen down to currently-viewed screen.
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mapScreens :: (Screen -> a) -> UIState -> [a]
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mapScreens f UIState{aPrevScreens, aScreen} = map f $ reverse $ aScreen : aPrevScreens
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-- Show a screen's compact id, plus for register screens, the transaction descriptions.
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screenRegisterDescriptions :: Screen -> String
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screenRegisterDescriptions scr = case scr of
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RS sst -> ((screenId scr ++ ":") ++) $ -- menu
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intercalate "," $ map (T.unpack . rsItemDescription) $
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takeWhile (not . T.null . rsItemDate) $ V.toList $ listElements $ _rssList sst
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_ -> screenId scr
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-- Show a screen's compact id (first letter of its constructor).
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screenId :: Screen -> String
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screenId = \case
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MS _ -> "M" -- menu
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AS _ -> "A" -- all accounts
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BS _ -> "B" -- bs accounts
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IS _ -> "I" -- is accounts
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RS _ -> "R" -- menu
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TS _ -> "T" -- transaction
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ES _ -> "E" -- error
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-- | How many blank items to add to lists to fill the full window height.
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uiNumBlankItems :: Int
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uiNumBlankItems
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-- | debugLevel >= uiDebugLevel = 0 -- suppress to improve debug output.
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-- | otherwise
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= 100 -- 100 ought to be enough for anyone
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