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Fix Layer Mod mishandling of right-handed mods, a mixup of 5-bit vs. 8-bit mods representation. #19845

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Feb 14, 2023
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Fix Layer Mod mishandling of right-handed mods, a mixup of 5-bit vs. 8-bit mods representation. #19845

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2 changes: 1 addition & 1 deletion quantum/keymap_common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -128,7 +128,7 @@ action_t action_for_keycode(uint16_t keycode) {
case QK_LAYER_MOD ... QK_LAYER_MOD_MAX:
mod = mod_config(QK_LAYER_MOD_GET_MODS(keycode));
action_layer = QK_LAYER_MOD_GET_LAYER(keycode);
action.code = ACTION_LAYER_MODS(action_layer, mod);
action.code = ACTION_LAYER_MODS(action_layer, (mod & 0x10) ? mod << 4 : mod);
break;
#endif
#ifndef NO_ACTION_TAPPING
Expand Down
63 changes: 63 additions & 0 deletions tests/basic/test_action_layer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
#include "test_common.hpp"

using testing::_;
using testing::AnyNumber;
using testing::InSequence;

class ActionLayer : public TestFixture {};
Expand Down Expand Up @@ -399,3 +400,65 @@ TEST_F(ActionLayer, LayerTapReleasedBeforeKeypressReleaseWithModifiers) {
EXPECT_TRUE(layer_state_is(0));
VERIFY_AND_CLEAR(driver);
}

TEST_F(ActionLayer, LayerModWithKeypress) {
TestDriver driver;
KeymapKey layer_key = KeymapKey{0, 0, 0, LM(1, MOD_RALT)};
KeymapKey regular_key = KeymapKey{0, 1, 0, KC_A};
set_keymap({layer_key, regular_key, KeymapKey{1, 1, 0, KC_B}});

// Allow any number of reports with no keys or only KC_RALT.
// clang-format off
EXPECT_CALL(driver, send_keyboard_mock(AnyOf(
KeyboardReport(),
KeyboardReport(KC_RALT))))
.Times(AnyNumber());
// clang-format on
EXPECT_REPORT(driver, (KC_RALT, KC_B)).Times(1);

layer_key.press();
run_one_scan_loop();
EXPECT_TRUE(layer_state_is(1));
EXPECT_EQ(get_mods(), MOD_BIT(KC_RALT));

tap_key(regular_key);

layer_key.release();
run_one_scan_loop();
EXPECT_TRUE(layer_state_is(0));
EXPECT_EQ(get_mods(), 0);

VERIFY_AND_CLEAR(driver);
}

TEST_F(ActionLayer, LayerModHonorsModConfig) {
TestDriver driver;
KeymapKey layer_key = KeymapKey{0, 0, 0, LM(1, MOD_RALT)};
KeymapKey regular_key = KeymapKey{0, 1, 0, KC_A};
set_keymap({layer_key, regular_key, KeymapKey{1, 1, 0, KC_B}});

// Allow any number of reports with no keys or only KC_RALT.
// clang-format off
EXPECT_CALL(driver, send_keyboard_mock(AnyOf(
KeyboardReport(),
KeyboardReport(KC_RGUI))))
.Times(AnyNumber());
// clang-format on
EXPECT_REPORT(driver, (KC_RGUI, KC_B)).Times(1);

keymap_config.swap_ralt_rgui = true;

layer_key.press();
run_one_scan_loop();
EXPECT_TRUE(layer_state_is(1));
EXPECT_EQ(get_mods(), MOD_BIT(KC_RGUI));

tap_key(regular_key);

layer_key.release();
run_one_scan_loop();
EXPECT_TRUE(layer_state_is(0));
EXPECT_EQ(get_mods(), 0);

VERIFY_AND_CLEAR(driver);
}