PangoWrapMode describes how to wrap the lines of a
to the desired width.
PANGO_WRAP_WORD, Pango uses break opportunities that are determined
by the Unicode line breaking algorithm. For
PANGO_WRAP_CHAR, Pango allows
breaking at grapheme boundaries that are determined by the Unicode text
Wrap lines at word boundaries.
Wrap lines at character boundaries.
Wrap lines at word boundaries, but fall back to character boundaries if there is not enough space for a full word.