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Clarify the meaning of "escapes" in some Haddocks (fixes #186)

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This commit is contained in:
Jonathan Daugherty 2020-05-02 15:53:44 -07:00
parent f7eef975de
commit 17e2560846
1 changed files with 10 additions and 8 deletions
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18
src/Graphics/Vty/Image.hs
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@ -117,14 +117,16 @@ horizCat = foldr horizJoin EmptyImage
vertCat :: [Image] -> Image
vertCat = foldr vertJoin EmptyImage
-- | Make an 'Image' from a lazy text value. This function should not be
-- given a text value containing escapes.
-- | Make an 'Image' from a lazy text value. The text value should be
-- sanitized of escape sequences (ASCII 27) and carriage returns;
-- otherwise layout and attribute problems may result.
text :: Attr -> TL.Text -> Image
text a txt = let displayWidth = safeWctlwidth txt
in HorizText a txt displayWidth (fromIntegral $! TL.length txt)
-- | Make an 'Image' from a text value. This function should not be
-- given a text value containing escapes.
-- | Make an 'Image' from a text value. The text value should be
-- sanitized of escape sequences (ASCII 27) and carriage returns;
-- otherwise layout and attribute problems may result.
text' :: Attr -> T.Text -> Image
text' a txt = let displayWidth = safeWctwidth txt
in HorizText a (TL.fromStrict txt) displayWidth (T.length txt)
@ -138,8 +140,9 @@ char a c =
-- | Make an image from a string of characters layed out on a single
-- row with the same display attribute. The string is assumed to be a
-- sequence of ISO-10646 characters. This function should not be given a
-- string containing escapes.
-- sequence of ISO-10646 characters. The input string should be
-- sanitized of escape sequences (ASCII 27) and carriage returns;
-- otherwise layout and attribute problems may result.
--
-- Note: depending on how the Haskell compiler represents string
-- literals, a string literal in a UTF-8 encoded source file, for
@ -156,8 +159,7 @@ iso10646String a str =
--
-- This is an alias for iso10646String since the usual case is that a
-- literal string like "foo" is represented internally as a list of ISO
-- 10646 31 bit characters. This function should not be given a string
-- containing escapes.
-- 10646 31 bit characters.
--
-- Note: Keep in mind that GHC will compile source encoded as UTF-8
-- but the literal strings, while UTF-8 encoded in the source, will be