keys.go RawHistoryFolder

1package popup
2
3// xkb keysyms the menu reacts to.
4const (
5	keysymBackSpace = 0xff08
6	keysymTab       = 0xff09
7	keysymEscape    = 0xff1b
8	keysymLeft      = 0xff51
9	keysymUp        = 0xff52
10	keysymDown      = 0xff54
11)
12
13// keyAction is what a key press does in a menu.
14type keyAction uint8
15
16const (
17	keyForward  keyAction = iota // pass the key to nefergui unchanged
18	keyNext                      // move the focus to the next entry (Tab)
19	keyPrevious                  // move the focus to the previous entry (Shift+Tab)
20	keyBack                      // leave the submenu
21	keyClose                     // dismiss the menu
22)
23
24// mapKey says what a key does. Up and Down walk the entries, Left and
25// BackSpace leave a submenu, Escape dismisses; everything else (Tab, Return,
26// Space…) goes to nefergui. Left and BackSpace do nothing at the top level.
27func mapKey(keysym uint32, inSubmenu bool) keyAction {
28	switch keysym {
29	case keysymDown:
30		return keyNext
31	case keysymUp:
32		return keyPrevious
33	case keysymEscape:
34		return keyClose
35	case keysymLeft, keysymBackSpace:
36		if inSubmenu {
37			return keyBack
38		}
39		return keyForward
40	}
41	return keyForward
42}