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Refactor the source layer cache encoding

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This commit is contained in:
Wojciech Siewierski 2016-04-05 10:54:47 +02:00
parent 47dd29513e
commit 567f256c5d
3 changed files with 71 additions and 41 deletions
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41
tmk_core/common/action.c
View file

@ -55,7 +55,6 @@ void action_exec(keyevent_t event)
#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
bool disable_action_cache = false;
uint8_t source_layers_cache[5][(MATRIX_ROWS * MATRIX_COLS + 7) / 8] = {0};
void process_action_nocache(keyrecord_t *record)
{
@ -70,46 +69,6 @@ void process_action_nocache(keyrecord_t *record)
}
#endif
/*
* Make sure the action triggered when the key is released is the same
* one as the one triggered on press. It's important for the mod keys
* when the layer is switched after the down event but before the up
* event as they may get stuck otherwise.
*/
action_t store_or_get_action(bool pressed, keypos_t key)
{
#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
if (disable_action_cache) {
return layer_switch_get_action(key);
}
const uint8_t key_number = key.col + (key.row * MATRIX_COLS);
const uint8_t storage_row = key_number / 8;
const uint8_t storage_bit = key_number % 8;
uint8_t layer;
if (pressed) {
layer = layer_switch_get_layer(key);
for (uint8_t bit_number = 0; bit_number < 5; bit_number++) {
source_layers_cache[bit_number][storage_row] ^=
(-((layer & (1U << bit_number)) != 0)
^ source_layers_cache[bit_number][storage_row])
& (1U << storage_bit);
}
}
else {
layer = 0;
for (uint8_t bit_number = 0; bit_number < 5; bit_number++) {
layer |=
((source_layers_cache[bit_number][storage_row]
& (1U << storage_bit)) != 0)
<< bit_number;
}
}
return action_for_key(layer, key);
#else
return layer_switch_get_action(key);
#endif
}
__attribute__ ((weak))
void process_action_kb(keyrecord_t *record) {}

63
tmk_core/common/action_layer.c
View file

@ -110,6 +110,69 @@ void layer_debug(void)
}
#endif
#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
uint8_t source_layers_cache[MAX_LAYER_BITS][(MATRIX_ROWS * MATRIX_COLS + 7) / 8] = {0};
void update_source_layers_cache(keypos_t key, uint8_t layer)
{
const uint8_t key_number = key.col + (key.row * MATRIX_COLS);
const uint8_t storage_row = key_number / 8;
const uint8_t storage_bit = key_number % 8;
for (uint8_t bit_number = 0; bit_number < MAX_LAYER_BITS; bit_number++) {
source_layers_cache[bit_number][storage_row] ^=
(-((layer & (1U << bit_number)) != 0)
^ source_layers_cache[bit_number][storage_row])
& (1U << storage_bit);
}
}
uint8_t read_source_layers_cache(keypos_t key)
{
const uint8_t key_number = key.col + (key.row * MATRIX_COLS);
const uint8_t storage_row = key_number / 8;
const uint8_t storage_bit = key_number % 8;
uint8_t layer = 0;
for (uint8_t bit_number = 0; bit_number < MAX_LAYER_BITS; bit_number++) {
layer |=
((source_layers_cache[bit_number][storage_row]
& (1U << storage_bit)) != 0)
<< bit_number;
}
return layer;
}
#endif
/*
* Make sure the action triggered when the key is released is the same
* one as the one triggered on press. It's important for the mod keys
* when the layer is switched after the down event but before the up
* event as they may get stuck otherwise.
*/
action_t store_or_get_action(bool pressed, keypos_t key)
{
#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
if (disable_action_cache) {
return layer_switch_get_action(key);
}
uint8_t layer;
if (pressed) {
layer = layer_switch_get_layer(key);
update_source_layers_cache(key, layer);
}
else {
layer = read_source_layers_cache(key);
}
return action_for_key(layer, key);
#else
return layer_switch_get_action(key);
#endif
}
int8_t layer_switch_get_layer(keypos_t key)
{

8
tmk_core/common/action_layer.h
View file

@ -70,6 +70,14 @@ void layer_xor(uint32_t state);
#define layer_debug()
#endif
/* pressed actions cache */
#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
/* The number of bits needed to represent the layer number: log2(32). */
#define MAX_LAYER_BITS 5
void update_source_layers_cache(keypos_t key, uint8_t layer);
uint8_t read_source_layers_cache(keypos_t key);
#endif
action_t store_or_get_action(bool pressed, keypos_t key);
/* return the topmost non-transparent layer currently associated with key */
int8_t layer_switch_get_layer(keypos_t key);