mjhjmtu

I'd like to map my keyboard so that (when the Numlock is On), the numpad key 2 named KP_2 procudes a 2, but when I press Shift or Control I want this same key to produce a Down event, exactly like the down key.

So I created a new type like that contains the following added lines:

 modifiers= Shift+Control+NumLock+LevelThree;
 map[Shift+NumLock]= Level1;
 preserve[Shift+NumLock]= None;
 ...
 map[Control+NumLock]= Level1;
 preserve[Control+NumLock]= None;

So the whole type becomes:

type "FOUR_LEVEL_MIXED_KEYPAD_CUST" 
 modifiers= Shift+Control+NumLock+LevelThree;
 map[Shift+NumLock]= Level1;
 preserve[Shift+NumLock]= None;
 map[NumLock]= Level2;
 map[Shift]= Level2;
 map[LevelThree]= Level3;
 map[NumLock+LevelThree]= Level3;
 map[Shift+LevelThree]= Level4;
 map[Shift+NumLock+LevelThree]= Level4;
 map[Control+NumLock]= Level1;
 preserve[Control+NumLock]= None;
 level_name[Level1]= "Base";
 level_name[Level2]= "Number";
 level_name[Level3]= "Alt Base";
 level_name[Level4]= "Shift Alt";
 ;

And I changed the KP_2 section to take this into account that way:

 key <KP2> 
 type= "FOUR_LEVEL_MIXED_KEYPAD_CUST",
 symbols[Group1]= [ Down, KP_2, U2193, U21D3 ]
 ;

(see KP_Down became Down and I changed the name of the group)

Unfortunately, when I run xkbcomp preserve_none.xkb $DISPLAY, on LibreOffice Calc, Shift + (NumLock) + KP2 produces something like a Shift + Down (it both goes down and select, despite the preserve[...]=None), and when I press Ctrl + KP2, basically nothing happen, I don't even move.

Do you see what I did wrong? Thanks!

NB: You can find the whole file here: http://paste.debian.net/1063341

Hum, I think I found the solution using something based on this answer : https://superuser.com/questions/801611/how-to-make-all-applications-respect-my-modified-xkb-layout/1000320#1000320

So first, I don't know why, but it seems that for some reason I need to use type[Group1]=... instead of just type=... even if sometimes it works.

Then, the key was to introduce some new symcodes (not sure it's the good term) osfDown/osfUp/.... For example, here we say that the symcode osfLeft should be interpreted as a press on the key <LEFT>, after releasing the Shift key (at least it's how I understand it):

 interpret osfLeft 
 repeat= True;
 action = RedirectKey(keycode=<LEFT>, clearmodifiers=Shift);
 ;

If instead you want to release the modifier Control, you can replace Shift with Control, or even Control+Shift if you want to clear both. Then, you need to replace the old KP_Left symcode with the symcode that we just created:

 key <KP4> 
 type[Group1]= "FOUR_LEVEL_MIXED_KEYPAD",
 symbols[Group1]= [ osfLeft, KP_4, U2190, U21D0 ]
 ;

That way, instead of generating a KP_Left (and eventually the Shift/Control associated, depending on what you pressed), this will remove the Shift/Control modifier (again, depending on what you configured in osfLeft).

So at that step here is a first solution:

# Load with xkbcomp shift_numpad.xkb $DISPLAY
# List modifiers: xmodmap -pm
xkb_keymap 
 xkb_keycodes 
 include "evdev+aliases(azerty)"
 ;
 xkb_types 
 include "complete" 
 ;
 xkb_compat 
 include "complete"
 interpret osfLeft 
 repeat True;
 action = RedirectKey(keycode=<LEFT>, clearmodifiers=Shift);
 ;
 interpret osfRight 
 repeat= True;
 action = RedirectKey(keycode=<RGHT>, clearmodifiers=Shift);
 ;
 interpret osfUp 
 repeat= True;
 action = RedirectKey(keycode=<UP>, clearmodifiers=Shift);
 ;
 interpret osfDown 
 repeat= True;
 action = RedirectKey(keycode=<DOWN>, clearmodifiers=Shift);
 ;
 ;
 xkb_symbols 
 include "pc+fr(oss)+fr(bepo):2+inet(evdev)+ctrl(swapcaps)"
 key <KP8> 
 type= "FOUR_LEVEL_MIXED_KEYPAD",
 symbols[Group1]= [ osfUp, KP_8, U2191, U21D1 ]
 ;
 key <KP4> 
 type= "FOUR_LEVEL_MIXED_KEYPAD",
 symbols[Group1]= [ osfLeft, KP_4, U2190, U21D0 ]
 ;
 key <KP5> 
 type= "FOUR_LEVEL_MIXED_KEYPAD",
 symbols[Group1]= [ osfDown, KP_5, U2194, U21D4 ]
 ;
 key <KP6> 
 type= "FOUR_LEVEL_MIXED_KEYPAD",
 symbols[Group1]= [ osfRight, KP_6, U2192, U21D2 ]
 ;
 key <KP2> 
 type= "FOUR_LEVEL_MIXED_KEYPAD",
 symbols[Group1]= [ osfDown, KP_2, U2193, U21D3 ]
 ;

 ;
 xkb_geometry 
 include "pc(pc105)" 
 ;
;

Note however that the type "FOUR_LEVEL_MIXED_KEYPAD" does not define anything for Control, and in my case I wanted to have Shift+2 to be equivalent to Shift+Down (i.e. select), but also that Control+2 generate a Down without any modifier. So I needed to update the definition of osfLeft in order to remove the modifier Control, but keep the modifier Shift if it was already present. Then, I needed to define an a custom type that maps also Ctrl on level 1:

 type "FOUR_LEVEL_MIXED_KEYPAD_CUST" 
 modifiers= Shift+NumLock+LevelThree+Control;
 map[Shift+NumLock]= Level1;
 map[Control+NumLock]= Level1;
 map[NumLock]= Level2;
 map[Shift]= Level2;
 map[Control]= Level2;
 map[LevelThree]= Level3;
 map[NumLock+LevelThree]= Level3;
 map[Shift+LevelThree]= Level4;
 map[Shift+NumLock+LevelThree]= Level4;
 level_name[Level1]= "Base";
 level_name[Level2]= "Number";
 level_name[Level3]= "Alt Base";
 level_name[Level4]= "Shift Alt";
 ;

If I put that all together, it gives:

# Load with xkbcomp shift_numpad.xkb $DISPLAY
# List modifiers: xmodmap -pm
xkb_keymap 
 xkb_keycodes 
 include "evdev+aliases(azerty)"
 ;
 xkb_types 
 include "complete"
 type "FOUR_LEVEL_MIXED_KEYPAD_CUST" 
 modifiers= Shift+NumLock+LevelThree+Control;
 map[Shift+NumLock]= Level1;
 map[Control+NumLock]= Level1;
 map[NumLock]= Level2;
 map[Shift]= Level2;
 map[Control]= Level2;
 map[LevelThree]= Level3;
 map[NumLock+LevelThree]= Level3;
 map[Shift+LevelThree]= Level4;
 map[Shift+NumLock+LevelThree]= Level4;
 level_name[Level1]= "Base";
 level_name[Level2]= "Number";
 level_name[Level3]= "Alt Base";
 level_name[Level4]= "Shift Alt";
 ;
 ;
 xkb_compat 
 include "complete"
 interpret osfLeft 
 repeat= True;
 action = RedirectKey(keycode=<LEFT>, clearmodifiers=Control);
 ;
 interpret osfRight 
 repeat= True;
 action = RedirectKey(keycode=<RGHT>, clearmodifiers=Control);
 ;
 interpret osfUp 
 repeat= True;
 action = RedirectKey(keycode=<UP>, clearmodifiers=Control);
 ;
 interpret osfDown 
 repeat= True;
 action = RedirectKey(keycode=<DOWN>, clearmodifiers=Control);
 ;
 ;
 xkb_symbols 
 include "pc+fr(oss)+fr(bepo):2+inet(evdev)+ctrl(swapcaps)"
 key <KP8> 
 type[Group1]= "FOUR_LEVEL_MIXED_KEYPAD_CUST",
 symbols[Group1]= [ osfUp, KP_8, U2191, U21D1 ]
 ;
 key <KP4> 
 type[Group1]= "FOUR_LEVEL_MIXED_KEYPAD_CUST",
 symbols[Group1]= [ osfLeft, KP_4, U2190, U21D0 ]
 ;
 key <KP5> 
 type[Group1]= "FOUR_LEVEL_MIXED_KEYPAD_CUST",
 symbols[Group1]= [ osfDown, KP_5, U2194, U21D4 ]
 ;
 key <KP6> 
 type[Group1]= "FOUR_LEVEL_MIXED_KEYPAD_CUST",
 symbols[Group1]= [ osfRight, KP_6, U2192, U21D2 ]
 ;
 key <KP2> 
 type[Group1]= "FOUR_LEVEL_MIXED_KEYPAD_CUST",
 symbols[Group1]= [ osfDown, KP_2, U2193, U21D3 ]
 ;

 ;
 xkb_geometry 
 include "pc(pc105)" 
 ;
;

NB: And if you want to play with the Super/LWIN key, it's exactly the same thing, but use Mod4 instead of Shift, and make sure you have a

 modifier_map Mod4 <LWIN> ;

in the symbol section!