Retrieves the selection bound of the editable.
start_pos will be filled with the start of the selection and end_pos
with end. If no text was selected both will be
identical and false will be returned.
Note that positions are specified in characters, not bytes.
this |
a Editable |
start_pos |
location to store the starting position, or null |
end_pos |
location to store the end position, or null |
true if an area is selected, false otherwise |