Sets surrounding context around the insertion point and preedit string. This function is expected to be called in response to the GtkIMContext::retrieve_surrounding signal, and will likely have no effect if called at other times.
text surrounding the insertion point, as UTF-8. the preedit string should not be included within @text.
the length of @text, or -1 if @text is nul-terminated
the byte index of the insertion cursor within @text.
See Implementation
Sets surrounding context around the insertion point and preedit string. This function is expected to be called in response to the GtkIMContext::retrieve_surrounding signal, and will likely have no effect if called at other times.