OpenEuphoria

Re: RDS! ed in FreeBSD

• Posted by "C. K. Lester" <euphoric at cklester.com> Oct 16, 2003
• 456 views

Robert Craig wrote:

> C. K. Lester wrote:
>
>> Rob, I've found the problem.
>>
>> ed.ex uses wait_key() to get user input.
>> key.ex uses get_key() to get user input.
>>
>> get_key() returns the right keycode. wait_key() returns something else.
>>
>> When I substitute "wait_key()" for "get_key()" in key.ex, I get THREE
>> codes output. For instance, when get_key() receives an up arrow, it
>> outputs 259. When wait_key() receives an up arrow, I get 27, 79, 65, all
>> one after the other.
>
> Some systems generate a series of 3 codes for certain special
> keys. The function next_key() in ed.ex has the logic for
> handling single or triple key codes, but it doesn't expect
> the arrow keys to come through as triples. I guess you'll have
> to modify next_key() to detect when the sets of three codes
> that represent arrow keys come through.
> Right now it only handles Home and End. It looks
> for 27 then 79, then 0 for Home or 101 for End. You'll have
> to add elsif's for 65 and and the other keys.
>
> Maybe you can trace ed.ex and see what it does
> when you hit an arrow key. 

You mean you don't know?! It's your program! :)

Okay, the arrow keys also return the 27 then 79 then a special number, 
so that should be easy to modify. However, I tested out the CTRL+Home 
and CTRL+End (keystrokes which I must have) and they have FIVE returned 
numbers! whew.