mirror of
https://github.com/jtdaugherty/brick.git
synced 2024-09-11 15:55:54 +03:00
6f1b62ae53
This change is motivated by the API wart that results from the overloading of both "<>" and string literals that resulted in code like this: a :: AttrName a = "blah" <> "things" While this worked to create an AttrName with two segments, it is far too easy to read this as two strings concatenated. The overloading hides what is really going on with the segments of the attribute name. The way to write the above example after this change is: a :: AttrName a = attrName "blah" <> attrName "things"
110 lines
3.4 KiB
Haskell
110 lines
3.4 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE CPP #-}
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module Main where
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import qualified Control.Exception as E
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#if !(MIN_VERSION_base(4,11,0))
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import Data.Monoid
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#endif
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import qualified Graphics.Vty as V
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import Control.Monad.State (get)
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import qualified Data.Text as Text
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import qualified Brick.Main as M
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import qualified Brick.Widgets.List as L
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import Brick.AttrMap (AttrName, attrName)
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import Brick.Types
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( Widget
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, BrickEvent(..)
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)
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import Brick.Widgets.Center
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( center
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, hCenter
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)
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import Brick.Widgets.Border
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( borderWithLabel
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)
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import Brick.Widgets.Core
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( vBox, (<=>), padTop
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, hLimit, vLimit, txt
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, withDefAttr, emptyWidget
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, Padding(..)
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)
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import qualified Brick.Widgets.FileBrowser as FB
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import qualified Brick.AttrMap as A
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import Brick.Util (on, fg)
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import qualified Brick.Types as T
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data Name = FileBrowser1
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deriving (Eq, Show, Ord)
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drawUI :: FB.FileBrowser Name -> [Widget Name]
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drawUI b = [center $ ui <=> help]
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where
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ui = hCenter $
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vLimit 15 $
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hLimit 50 $
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borderWithLabel (txt "Choose a file") $
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FB.renderFileBrowser True b
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help = padTop (Pad 1) $
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vBox [ case FB.fileBrowserException b of
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Nothing -> emptyWidget
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Just e -> hCenter $ withDefAttr errorAttr $
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txt $ Text.pack $ E.displayException e
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, hCenter $ txt "Up/Down: select"
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, hCenter $ txt "/: search, Ctrl-C or Esc: cancel search"
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, hCenter $ txt "Enter: change directory or select file"
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, hCenter $ txt "Esc: quit"
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]
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appEvent :: BrickEvent Name e -> T.EventM Name (FB.FileBrowser Name) ()
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appEvent (VtyEvent ev) = do
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b <- get
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case ev of
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V.EvKey V.KEsc [] | not (FB.fileBrowserIsSearching b) ->
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M.halt
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_ -> do
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FB.handleFileBrowserEvent ev
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-- If the browser has a selected file after handling the
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-- event (because the user pressed Enter), shut down.
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case ev of
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V.EvKey V.KEnter [] -> do
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b' <- get
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case FB.fileBrowserSelection b' of
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[] -> return ()
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_ -> M.halt
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_ -> return ()
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appEvent _ = return ()
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errorAttr :: AttrName
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errorAttr = attrName "error"
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theMap :: A.AttrMap
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theMap = A.attrMap V.defAttr
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[ (L.listSelectedFocusedAttr, V.black `on` V.yellow)
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, (FB.fileBrowserCurrentDirectoryAttr, V.white `on` V.blue)
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, (FB.fileBrowserSelectionInfoAttr, V.white `on` V.blue)
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, (FB.fileBrowserDirectoryAttr, fg V.blue)
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, (FB.fileBrowserBlockDeviceAttr, fg V.magenta)
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, (FB.fileBrowserCharacterDeviceAttr, fg V.green)
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, (FB.fileBrowserNamedPipeAttr, fg V.yellow)
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, (FB.fileBrowserSymbolicLinkAttr, fg V.cyan)
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, (FB.fileBrowserUnixSocketAttr, fg V.red)
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, (FB.fileBrowserSelectedAttr, V.white `on` V.magenta)
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, (errorAttr, fg V.red)
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]
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theApp :: M.App (FB.FileBrowser Name) e Name
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theApp =
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M.App { M.appDraw = drawUI
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, M.appChooseCursor = M.showFirstCursor
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, M.appHandleEvent = appEvent
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, M.appStartEvent = return ()
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, M.appAttrMap = const theMap
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}
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main :: IO ()
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main = do
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b <- M.defaultMain theApp =<< FB.newFileBrowser FB.selectNonDirectories FileBrowser1 Nothing
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putStrLn $ "Selected entry: " <> show (FB.fileBrowserSelection b)
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