diff options
| -rw-r--r-- | src/Text/Pandoc/Pretty.hs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Pretty.hs b/src/Text/Pandoc/Pretty.hs index 042f247ad..c1d529888 100644 --- a/src/Text/Pandoc/Pretty.hs +++ b/src/Text/Pandoc/Pretty.hs @@ -67,6 +67,7 @@ module Text.Pandoc.Pretty ( , parens , quotes , doubleQuotes + , charWidth ) where @@ -461,3 +462,39 @@ quotes = inside (char '\'') (char '\'') doubleQuotes :: Doc -> Doc doubleQuotes = inside (char '"') (char '"') +-- | Returns width of a character in a monospace font: 0 for a combining +-- character, 1 for a regular character, 2 for an East Asian wide character. +charWidth :: Char -> Int +charWidth c = + case c of + _ | c >= '\x300' && c <= '\x36e' -> 0 -- combining + | c == '\x3000' -> 2 -- full + | c >= '\xFF01' && c <= '\xFF60' -> 2 + | c >= '\xFFE0' && c <= '\xFFE6' -> 2 + | c >= '\x1100' && c <= '\x1159' -> 2 -- wide + | c >= '\x115F' && c <= '\x115F' -> 2 + | c >= '\x2329' && c <= '\x232A' -> 2 + | c >= '\x2E80' && c <= '\x2E99' -> 2 + | c >= '\x2E9B' && c <= '\x2EF3' -> 2 + | c >= '\x2F00' && c <= '\x2FD5' -> 2 + | c >= '\x2FF0' && c <= '\x2FFB' -> 2 + | c >= '\x3001' && c <= '\x303E' -> 2 + | c >= '\x3041' && c <= '\x3096' -> 2 + | c >= '\x3099' && c <= '\x30FF' -> 2 + | c >= '\x3105' && c <= '\x312C' -> 2 + | c >= '\x3131' && c <= '\x318E' -> 2 + | c >= '\x3190' && c <= '\x31B7' -> 2 + | c >= '\x31F0' && c <= '\x321E' -> 2 + | c >= '\x3220' && c <= '\x3243' -> 2 + | c >= '\x3250' && c <= '\x327D' -> 2 + | c >= '\x327F' && c <= '\x32FE' -> 2 + | c >= '\x3300' && c <= '\x33FF' -> 2 + | c >= '\xA000' && c <= '\xA48C' -> 2 + | c >= '\xA490' && c <= '\xA4C6' -> 2 + | c >= '\xF900' && c <= '\xFA2D' -> 2 + | c >= '\xFA30' && c <= '\xFA6A' -> 2 + | c >= '\xFE30' && c <= '\xFE52' -> 2 + | c >= '\xFE54' && c <= '\xFE66' -> 2 + | c >= '\xFE68' && c <= '\xFE6B' -> 2 + | c >= '\x2F800' && c <= '\x2FA1D' -> 2 + | otherwise -> 1 |