mirror of
https://github.com/simplex-chat/simplex-chat.git
synced 2026-03-30 22:55:48 +00:00
774af334fd
* terminal: command to show the list of the last active chats * indent for chats without messages, help * update command in the test
99 lines
2.7 KiB
Haskell
99 lines
2.7 KiB
Haskell
{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE OverloadedStrings #-}
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module Simplex.Chat.Styled
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( StyledString (..),
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StyledFormat (..),
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styleMarkdown,
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styleMarkdownList,
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unStyle,
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sLength,
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sShow,
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sTake,
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)
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where
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import Data.ByteString.Char8 (ByteString)
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import qualified Data.ByteString.Char8 as B
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import Data.String
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import Data.Text (Text)
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import qualified Data.Text as T
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import Simplex.Chat.Markdown
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import System.Console.ANSI.Types
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data StyledString = Styled [SGR] String | StyledString :<>: StyledString
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deriving (Show)
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instance Semigroup StyledString where (<>) = (:<>:)
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instance Monoid StyledString where mempty = ""
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instance IsString StyledString where fromString = plain
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styleMarkdown :: Markdown -> StyledString
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styleMarkdown (s1 :|: s2) = styleMarkdown s1 <> styleMarkdown s2
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styleMarkdown (Markdown f s) = styleFormat f s
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styleMarkdownList :: MarkdownList -> StyledString
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styleMarkdownList [] = ""
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styleMarkdownList [FormattedText f s] = styleFormat f s
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styleMarkdownList (FormattedText f s : ts) = styleFormat f s <> styleMarkdownList ts
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styleFormat :: Maybe Format -> Text -> StyledString
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styleFormat (Just Snippet) s = '`' `wrap` styled Snippet s
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styleFormat (Just Secret) s = '#' `wrap` styled Secret s
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styleFormat (Just f) s = styled f s
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styleFormat Nothing s = plain s
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wrap :: Char -> StyledString -> StyledString
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wrap c s = plain [c] <> s <> plain [c]
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class StyledFormat a where
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styled :: Format -> a -> StyledString
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plain :: a -> StyledString
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instance StyledFormat String where
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styled = Styled . sgr
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plain = Styled []
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instance StyledFormat ByteString where
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styled f = styled f . B.unpack
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plain = Styled [] . B.unpack
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instance StyledFormat Text where
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styled f = styled f . T.unpack
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plain = Styled [] . T.unpack
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sShow :: Show a => a -> StyledString
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sShow = plain . show
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sgr :: Format -> [SGR]
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sgr = \case
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Bold -> [SetConsoleIntensity BoldIntensity]
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Italic -> [SetUnderlining SingleUnderline, SetItalicized True]
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StrikeThrough -> [SetSwapForegroundBackground True]
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Colored (FormatColor c) -> [SetColor Foreground Vivid c]
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Secret -> [SetColor Foreground Dull Black, SetColor Background Dull Black]
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_ -> []
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unStyle :: StyledString -> String
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unStyle (Styled _ s) = s
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unStyle (s1 :<>: s2) = unStyle s1 <> unStyle s2
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sLength :: StyledString -> Int
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sLength (Styled _ s) = length s
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sLength (s1 :<>: s2) = sLength s1 + sLength s2
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sTake :: Int -> StyledString -> StyledString
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sTake n = go Nothing 0
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where
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go res len = \case
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Styled f s ->
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let s' = Styled f $ take (n - len) s
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in maybe id (<>) res s'
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s1 :<>: s2 ->
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let s1' = go res len s1
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len' = sLength s1'
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in if len' >= n then s1' else go (Just s1') len' s2
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