diff --git a/data/mappings/info_config.hjson b/data/mappings/info_config.hjson
index bc4f46c353..7c1a4ee36b 100644
--- a/data/mappings/info_config.hjson
+++ b/data/mappings/info_config.hjson
@@ -28,6 +28,7 @@
"BOOTMAGIC_LITE_COLUMN_RIGHT": {"info_key": "split.bootmagic.matrix.1", "value_type": "int"},
"BOTH_SHIFTS_TURNS_ON_CAPS_WORD": {"info_key": "caps_word.both_shifts_turns_on", "value_type": "bool"},
"CAPS_WORD_IDLE_TIMEOUT": {"info_key": "caps_word.idle_timeout", "value_type": "int"},
+ "CAPS_WORD_INVERT_ON_SHIFT": {"info_key": "caps_word.invert_on_shift", "value_type": "bool"},
"COMBO_COUNT": {"info_key": "combo.count", "value_type": "int"},
"COMBO_TERM": {"info_key": "combo.term", "value_type": "int"},
"DEBOUNCE": {"info_key": "debounce", "value_type": "int"},
diff --git a/data/schemas/keyboard.jsonschema b/data/schemas/keyboard.jsonschema
index ee6ecf28e4..6c4ff49855 100644
--- a/data/schemas/keyboard.jsonschema
+++ b/data/schemas/keyboard.jsonschema
@@ -227,7 +227,8 @@
"enabled": {"type": "boolean"},
"both_shifts_turns_on": {"type": "boolean"},
"double_tap_shift_turns_on": {"type": "boolean"},
- "idle_timeout": {"$ref": "qmk.definitions.v1#/unsigned_int"}
+ "idle_timeout": {"$ref": "qmk.definitions.v1#/unsigned_int"},
+ "invert_on_shift": {"type": "boolean"}
}
},
"combo": {
diff --git a/docs/feature_caps_word.md b/docs/feature_caps_word.md
index c58d1a56e2..7f726b059d 100644
--- a/docs/feature_caps_word.md
+++ b/docs/feature_caps_word.md
@@ -90,6 +90,26 @@ by defining `IS_COMMAND()` in config.h:
## Customizing Caps Word :id=customizing-caps-word
+### Invert on shift :id=invert-on-shift
+
+By default, Caps Word turns off when Shift keys are pressed, considering them as
+word-breaking. Alternatively with the `CAPS_WORD_INVERT_ON_SHIFT` option,
+pressing the Shift key continues Caps Word and inverts the shift state. This
+is convenient for uncapitalizing one or a few letters within a word, for
+example with Caps Word on, typing "D, B, Shift+A, Shift+A, S" produces "DBaaS",
+or typing "P, D, F, Shift+S" produces "PDFs".
+
+Enable it by adding in config.h
+
+```c
+#define CAPS_WORD_INVERT_ON_SHIFT
+```
+
+This option works with regular Shift keys `KC_LSFT` and `KC_RSFT`, mod-tap Shift
+keys, and one-shot Shift keys. Note that while Caps Word is on, one-shot Shift
+keys behave like regular Shift keys, and have effect only while they are held.
+
+
### Idle timeout :id=idle-timeout
Caps Word turns off automatically if no keys are pressed for
diff --git a/quantum/process_keycode/process_caps_word.c b/quantum/process_keycode/process_caps_word.c
index 94302b29ae..8f2ee1db8b 100644
--- a/quantum/process_keycode/process_caps_word.c
+++ b/quantum/process_keycode/process_caps_word.c
@@ -14,6 +14,54 @@
#include "process_caps_word.h"
+#ifdef CAPS_WORD_INVERT_ON_SHIFT
+static uint8_t held_mods = 0;
+
+static bool handle_shift(uint16_t keycode, keyrecord_t* record) {
+ switch (keycode) {
+ case OSM(MOD_LSFT):
+ keycode = KC_LSFT;
+ break;
+ case OSM(MOD_RSFT):
+ keycode = KC_RSFT;
+ break;
+
+# ifndef NO_ACTION_TAPPING
+ case QK_MOD_TAP ... QK_MOD_TAP_MAX:
+ if (record->tap.count == 0) { // Mod-tap key is held.
+ switch (QK_MOD_TAP_GET_MODS(keycode)) {
+ case MOD_LSFT:
+ keycode = KC_LSFT;
+ break;
+ case MOD_RSFT:
+ keycode = KC_RSFT;
+ break;
+ }
+ }
+# endif // NO_ACTION_TAPPING
+ }
+
+ if (keycode == KC_LSFT || keycode == KC_RSFT) {
+ const uint8_t mod = MOD_BIT(keycode);
+
+ if (is_caps_word_on()) {
+ if (record->event.pressed) {
+ held_mods |= mod;
+ } else {
+ held_mods &= ~mod;
+ }
+ return false;
+ } else if ((held_mods & mod) != 0) {
+ held_mods &= ~mod;
+ del_mods(mod);
+ return record->event.pressed;
+ }
+ }
+
+ return true;
+}
+#endif // CAPS_WORD_INVERT_ON_SHIFT
+
bool process_caps_word(uint16_t keycode, keyrecord_t* record) {
if (keycode == QK_CAPS_WORD_TOGGLE) {
if (record->event.pressed) {
@@ -21,6 +69,11 @@ bool process_caps_word(uint16_t keycode, keyrecord_t* record) {
}
return false;
}
+#ifdef CAPS_WORD_INVERT_ON_SHIFT
+ if (!handle_shift(keycode, record)) {
+ return false;
+ }
+#endif // CAPS_WORD_INVERT_ON_SHIFT
#ifndef NO_ACTION_ONESHOT
const uint8_t mods = get_mods() | get_oneshot_mods();
@@ -111,12 +164,14 @@ bool process_caps_word(uint16_t keycode, keyrecord_t* record) {
if (record->tap.count == 0) { // Mod-tap key is held.
const uint8_t mods = QK_MOD_TAP_GET_MODS(keycode);
switch (mods) {
+# ifndef CAPS_WORD_INVERT_ON_SHIFT
case MOD_LSFT:
keycode = KC_LSFT;
break;
case MOD_RSFT:
keycode = KC_RSFT;
break;
+# endif // CAPS_WORD_INVERT_ON_SHIFT
case MOD_RSFT | MOD_RALT:
keycode = RSFT(KC_RALT);
break;
@@ -124,6 +179,9 @@ bool process_caps_word(uint16_t keycode, keyrecord_t* record) {
return true;
default:
caps_word_off();
+# ifdef CAPS_WORD_INVERT_ON_SHIFT
+ add_mods(held_mods);
+# endif // CAPS_WORD_INVERT_ON_SHIFT
return true;
}
} else {
@@ -163,12 +221,20 @@ bool process_caps_word(uint16_t keycode, keyrecord_t* record) {
clear_weak_mods();
#endif // AUTO_SHIFT_ENABLE
if (caps_word_press_user(keycode)) {
+#ifdef CAPS_WORD_INVERT_ON_SHIFT
+ if (held_mods) {
+ set_weak_mods(get_weak_mods() ^ MOD_BIT(KC_LSFT));
+ }
+#endif // CAPS_WORD_INVERT_ON_SHIFT
send_keyboard_report();
return true;
}
}
caps_word_off();
+#ifdef CAPS_WORD_INVERT_ON_SHIFT
+ add_mods(held_mods);
+#endif // CAPS_WORD_INVERT_ON_SHIFT
return true;
}
diff --git a/tests/caps_word/caps_word_invert_on_shift/config.h b/tests/caps_word/caps_word_invert_on_shift/config.h
new file mode 100644
index 0000000000..7a3ec846f9
--- /dev/null
+++ b/tests/caps_word/caps_word_invert_on_shift/config.h
@@ -0,0 +1,21 @@
+// Copyright 2023 Google LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see .
+
+#pragma once
+
+#include "test_common.h"
+
+#define CAPS_WORD_INVERT_ON_SHIFT
+#define PERMISSIVE_HOLD
diff --git a/tests/caps_word/caps_word_invert_on_shift/test.mk b/tests/caps_word/caps_word_invert_on_shift/test.mk
new file mode 100644
index 0000000000..319c04d67a
--- /dev/null
+++ b/tests/caps_word/caps_word_invert_on_shift/test.mk
@@ -0,0 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see .
+
+CAPS_WORD_ENABLE = yes
+
diff --git a/tests/caps_word/caps_word_invert_on_shift/test_caps_word_invert_on_shift.cpp b/tests/caps_word/caps_word_invert_on_shift/test_caps_word_invert_on_shift.cpp
new file mode 100644
index 0000000000..d322448181
--- /dev/null
+++ b/tests/caps_word/caps_word_invert_on_shift/test_caps_word_invert_on_shift.cpp
@@ -0,0 +1,215 @@
+// Copyright 2023 Google LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see .
+
+#include "keyboard_report_util.hpp"
+#include "keycode.h"
+#include "test_common.hpp"
+#include "test_fixture.hpp"
+#include "test_keymap_key.hpp"
+
+using ::testing::_;
+using ::testing::AnyNumber;
+using ::testing::AnyOf;
+using ::testing::InSequence;
+using ::testing::TestParamInfo;
+
+namespace {
+
+struct ShiftKeyParams {
+ std::string name;
+ uint16_t keycode;
+ uint16_t report_shift_code;
+
+ static const std::string& GetName(const TestParamInfo& info) {
+ return info.param.name;
+ }
+};
+
+class CapsWordInvertOnShift : public ::testing::WithParamInterface, public TestFixture {
+ void SetUp() override {
+ caps_word_off();
+ }
+};
+
+// With Caps Word on, type "A, 4, Shift(A, 4, A), A, Shift(A), 4".
+TEST_P(CapsWordInvertOnShift, ShiftWithinWord) {
+ TestDriver driver;
+ KeymapKey key_shift(0, 0, 0, GetParam().keycode);
+ KeymapKey key_a(0, 1, 0, KC_A);
+ KeymapKey key_4(0, 2, 0, KC_4);
+ set_keymap({key_shift, key_a, key_4});
+
+ // Allow any number of reports with no keys or only KC_LSFT.
+ // clang-format off
+ EXPECT_CALL(driver, send_keyboard_mock(AnyOf(
+ KeyboardReport(),
+ KeyboardReport(KC_LSFT))))
+ .Times(AnyNumber());
+ // clang-format on
+
+ { // Expect: "A4a$aAa4"
+ InSequence s;
+ EXPECT_REPORT(driver, (KC_LSFT, KC_A));
+ EXPECT_REPORT(driver, (KC_4));
+ EXPECT_REPORT(driver, (KC_A));
+ EXPECT_REPORT(driver, (KC_LSFT, KC_4));
+ EXPECT_REPORT(driver, (KC_A));
+ EXPECT_REPORT(driver, (KC_LSFT, KC_A));
+ EXPECT_REPORT(driver, (KC_A));
+ EXPECT_REPORT(driver, (KC_4));
+ }
+
+ caps_word_on();
+ tap_keys(key_a, key_4); // Type "A, 4".
+
+ key_shift.press(); // Type "Shift(A, 4, A)".
+ run_one_scan_loop();
+ tap_keys(key_a, key_4, key_a);
+ key_shift.release();
+ run_one_scan_loop();
+
+ tap_key(key_a); // Type "A".
+
+ key_shift.press(); // Type "Shift(A)".
+ run_one_scan_loop();
+ tap_key(key_a);
+ key_shift.release();
+ run_one_scan_loop();
+
+ tap_key(key_4); // Type "4".
+
+ VERIFY_AND_CLEAR(driver);
+}
+
+TEST_P(CapsWordInvertOnShift, ShiftHeldAtWordEnd) {
+ TestDriver driver;
+ KeymapKey key_shift(0, 0, 0, GetParam().keycode);
+ KeymapKey key_a(0, 1, 0, KC_A);
+ KeymapKey key_slsh(0, 2, 0, KC_SLSH);
+ set_keymap({key_shift, key_a, key_slsh});
+
+ // Allow any number of reports with no keys or only KC_LSFT.
+ // clang-format off
+ EXPECT_CALL(driver, send_keyboard_mock(AnyOf(
+ KeyboardReport(),
+ KeyboardReport(KC_LSFT),
+ KeyboardReport(KC_RSFT))))
+ .Times(AnyNumber());
+ // clang-format on
+
+ { // Expect: "Aa?A"
+ InSequence s;
+ EXPECT_REPORT(driver, (KC_LSFT, KC_A));
+ EXPECT_REPORT(driver, (KC_A));
+ EXPECT_REPORT(driver, (GetParam().report_shift_code, KC_SLSH));
+ EXPECT_REPORT(driver, (GetParam().report_shift_code, KC_A));
+ }
+
+ caps_word_on();
+ tap_key(key_a);
+
+ key_shift.press(); // Press Shift.
+ run_one_scan_loop();
+
+ EXPECT_EQ(get_mods(), 0);
+
+ tap_key(key_a);
+ tap_key(key_slsh); // Tap '/' key, which is word breaking, ending Caps Word.
+
+ EXPECT_FALSE(is_caps_word_on());
+ EXPECT_EQ(get_mods(), MOD_BIT(GetParam().report_shift_code));
+
+ tap_key(key_a);
+ key_shift.release(); // Release Shift.
+ run_one_scan_loop();
+
+ EXPECT_EQ(get_mods(), 0);
+ VERIFY_AND_CLEAR(driver);
+}
+
+TEST_P(CapsWordInvertOnShift, TwoShiftsHeld) {
+ TestDriver driver;
+ KeymapKey key_shift1(0, 0, 0, GetParam().keycode);
+ KeymapKey key_shift2(0, 1, 0, GetParam().report_shift_code);
+ KeymapKey key_a(0, 2, 0, KC_A);
+ KeymapKey key_slsh(0, 3, 0, KC_SLSH);
+ set_keymap({key_shift1, key_shift2, key_a, key_slsh});
+
+ // Allow any number of reports with no keys or only KC_LSFT.
+ // clang-format off
+ EXPECT_CALL(driver, send_keyboard_mock(AnyOf(
+ KeyboardReport(),
+ KeyboardReport(KC_LSFT),
+ KeyboardReport(KC_RSFT))))
+ .Times(AnyNumber());
+ // clang-format on
+
+ { // Expect: "Aa?a"
+ InSequence s;
+ EXPECT_REPORT(driver, (KC_LSFT, KC_A));
+ EXPECT_REPORT(driver, (KC_A));
+ EXPECT_REPORT(driver, (GetParam().report_shift_code, KC_SLSH));
+ EXPECT_REPORT(driver, (KC_A));
+ }
+
+ caps_word_on();
+ tap_key(key_a);
+
+ key_shift1.press(); // Press shift1.
+ run_one_scan_loop();
+
+ EXPECT_EQ(get_mods(), 0);
+
+ tap_key(key_a);
+ tap_key(key_slsh); // Tap '/' key, which is word breaking, ending Caps Word.
+
+ EXPECT_FALSE(is_caps_word_on());
+ EXPECT_EQ(get_mods(), MOD_BIT(GetParam().report_shift_code));
+
+ key_shift2.press(); // Press shift2.
+ run_one_scan_loop();
+
+ EXPECT_EQ(get_mods(), MOD_BIT(GetParam().report_shift_code));
+
+ key_shift1.release(); // Release shift1.
+ run_one_scan_loop();
+
+ EXPECT_EQ(get_mods(), 0);
+ tap_key(key_a);
+
+ key_shift2.release(); // Release shift2.
+ run_one_scan_loop();
+
+ EXPECT_EQ(get_mods(), 0);
+ VERIFY_AND_CLEAR(driver);
+}
+
+// clang-format off
+INSTANTIATE_TEST_CASE_P(
+ Shifts,
+ CapsWordInvertOnShift,
+ ::testing::Values(
+ ShiftKeyParams{"KC_LSFT", KC_LSFT, KC_LSFT},
+ ShiftKeyParams{"KC_RSFT", KC_RSFT, KC_RSFT},
+ ShiftKeyParams{"LSFT_T", LSFT_T(KC_A), KC_LSFT},
+ ShiftKeyParams{"RSFT_T", RSFT_T(KC_A), KC_RSFT},
+ ShiftKeyParams{"OSM_LSFT", OSM(MOD_LSFT), KC_LSFT},
+ ShiftKeyParams{"OSM_RSFT", OSM(MOD_RSFT), KC_RSFT}
+ ),
+ ShiftKeyParams::GetName
+ );
+// clang-format on
+
+} // namespace