view: fix buffer overflow when dealing with combining characters

The `cell.len` attribute refers to the number of bytes of the underlying
text which are represented by this cell. The actual NUL terminated data
being displayed can have a completely unrelated length.

For example a NUL byte has a `cell.len` of 1, but is displayed as
`cell.data = "^@"`.

Because we currently have a fixed cell capacity of 16 bytes (including
the terminating NUL byte) long sequences of combining characters won't
be displayed correctly.

See also #679

0 files changed, 0 insertions, 0 deletions