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guide: some clarifying edits for text width issues

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Jonathan Daugherty 2022-08-05 15:26:28 -07:00
parent 32c1aa4f2f
commit 2473b32208
1 changed files with 7 additions and 6 deletions
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docs/guide.rst
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@ -989,17 +989,18 @@ to support wide characters in your application, this will not work:
let width = Data.Text.length t
because if the string contains any wide characters, their widths
will not be counted properly. In order to get this right, use the
``TextWidth`` type class to compute the width:
If the string contains any wide characters, their widths will not be
counted properly. In order to get this right, use the ``TextWidth`` type
class to compute the width:
.. code:: haskell
let width = Brick.Widgets.Core.textWidth t
The ``TextWidth`` type class uses Vty's character width routine
to compute the correct width. If you need to compute
the width of a single character, use ``Graphics.Text.wcwidth``.
The ``TextWidth`` type class uses Vty's character width routine to
compute the width by looking up the string's characdters in a Unicode
width table. If you need to compute the width of a single character, use
``Graphics.Text.wcwidth``.
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