"WTF Sequences"

[tomek-szczesny]

I don't even know where to begin. What is all this shit?
(This topic is dedicated to discussing sequences with unclear meaning)

// \e=                  // Application Keypad (DECKPAM)
// \e[?1h               // Application cursor keys (DECCKM)
// \e[?1l               // Normal Cursor Keys

[o-sdn-o]

\e[? 1 h/l

Keyboard arrow keys representation mode

Key	Off	On
Up	\e[A	\eOA
Down	\e[B	\eOB
Right	\e[C	\eOC
Left	\e[D	\eOD
Up	\e[1A	\eOA
Down	\e[1B	\eOB
Right	\e[1C	\eOC
Left	\e[1D	\eOD

[tomek-szczesny]

So the terminal can listen to either one or another style of cursor moving commands? Why not expect both at the same time?

[o-sdn-o]

Here the application tells the terminal in what format it wants to accept the pressed arrow keys.

Terminal will send it to the app when user press any arrow key.

[tomek-szczesny]

So that's a part of much bigger discussion then - the plan was to develop ncplane_putvt(), just for displaying a terminal window, and this is another reason why VT must be a separate widget - to handle stuff like this, signaling from the terminal back to the underlying program.