We want to allow plugins to change how keys are looked up - or where they are
looked up from -, and for this, the way we do that final lookup from `keymaps`
or elsewhere, must be overrideable.
We do this by having a `getKey` function pointer in the `Layer_` class, which
defaults to `getKeyFromPROGMEM`. Any plugin, or sketch, can change where
`getKey` points to, and thereby change the way keys are looked up.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
The plugin.h header only defined the KaleidoscopePlugin class, and while
there was a reason it was separate from Kaleidoscope.h, that reason is
long gone. Merge it there, and remove any reference to plugin.h, as it
is not needed anymore.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Instead of going through all the active layers each time we are looking for a
key, whenever we switch layers, compute the effective keymap, and store the
indexes. This makes the lookup a considerably faster operation, and lookups
happen far more often than layer switching.
This comes at a cost of ROWS*COLS amount of memory, and a bit of code, but on
the flip side, the lookup operation is now O(1), which is a very nice property
to have, if you want responsiveness. Changing layers is marginally slower,
however, but even with 32 active layers, doing the computation once, instead of
potentially many dozens of time, is still worth it.
We could further reduce the memory requirements if we stored more columns per
byte, but that's for a future optimization.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Instead of always iterating through all layers, which slows us down
considerably, keep track of the highest active one, and start from there.
This has a VERY noticeable impact on the speed at which we finish a scan cycle.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
The layer handling is a core functionality, it should be active at all times,
and should be at the very end, before the default event handler. Otherwise there
may be ordering issues, when a plugin wants to return layer keys from its own
event handler.
This also saves us a couple of bytes of both code and data, as an additional
bonus!
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Instead of having a primary and a temporary layer, store the state of at
most 32 layers in a bitfield. These can be individually turned on and
off, and key lookup starts from the top, and goes downwards until the
default layer to find a non-transparent key.
This allows one to reuse a partially transparent layer: set the default,
and the transparent parts will be reused. The numpad layer was updated
accordingly.
Having an interface to the layer switching things also makes it easier
to build other behaviour on top of these.
As part of the rework, layer handling was moved to a separate file, and into its
own, full-blown handler. Furthermore, we now use a single bit for all keymap
events.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Jesse Vincent
Gergely Nagy