Steno combinedkeys (#12538)

* Add support for steno keys that press adjacent keys simultaniously

* Add some docs for steno combined keys

4 files changed, 50 insertions, 0 deletions

diff --git a/docs/feature_stenography.md b/docs/feature_stenography.md
index bf4bd39db9..af4754ed78 100644
--- a/docs/feature_stenography.md
+++ b/docs/feature_stenography.md
@@ -128,3 +128,18 @@ As defined in `keymap_steno.h`.
 |`STN_RES1`||(GeminiPR only)|
 |`STN_RES2`||(GeminiPR only)|
 |`STN_PWR`||(GeminiPR only)|
+
+If you do not want to hit two keys with one finger combined keycodes can be used. These are also defined in `keymap_steno.h`, and causes both keys to be reported as pressed or released. To use these keycodes define `STENO_COMBINEDMAP` in your `config.h` file 
+|Combined key   | Key1   | Key 2    |
+|---------------|--------|----------|
+|STN_S3         | STN_S1 | STN_S2   |
+|STN_TKL        | STN_TL | STN_KL   |
+|STN_PWL        | STN_PL | STN_WL   |
+|STN_HRL        | STN_HL | STN_RL   |
+|STN_FRR        | STN_FR | STN_RR   |
+|STN_PBR        | STN_PR | STN_BR   |
+|STN_LGR        | STN_LR | STN_GR   |
+|STN_TSR        | STN_TR | STN_SR   |
+|STN_DZR        | STN_DR | STN_ZR   |
+|STN_AO         | STN_A  | STN_O    |
+|STN_EU         | STN_E  | STN_U    |
diff --git a/quantum/keymap_extras/keymap_steno.h b/quantum/keymap_extras/keymap_steno.h
index b9115fb8bf..ab95b43fdd 100644
--- a/quantum/keymap_extras/keymap_steno.h
+++ b/quantum/keymap_extras/keymap_steno.h
@@ -72,3 +72,21 @@ enum steno_keycodes {
     STN_ZR,
     STN__MAX = STN_ZR,  // must be less than QK_STENO_BOLT
 };
+
+#ifdef STENO_COMBINEDMAP
+enum steno_combined_keycodes
+{
+    STN_S3 = QK_STENO_COMB,
+    STN_TKL,
+    STN_PWL,
+    STN_HRL,
+    STN_FRR,
+    STN_PBR,
+    STN_LGR,
+    STN_TSR,
+    STN_DZR,
+    STN_AO,
+    STN_EU,
+    STN_COMB_MAX = STN_EU,
+};
+#endif
diff --git a/quantum/process_keycode/process_steno.c b/quantum/process_keycode/process_steno.c
index 57e279f211..a964aead35 100644
--- a/quantum/process_keycode/process_steno.c
+++ b/quantum/process_keycode/process_steno.c
@@ -65,6 +65,12 @@ static steno_mode_t mode;
 
 static const uint8_t boltmap[64] PROGMEM = {TXB_NUL, TXB_NUM, TXB_NUM, TXB_NUM, TXB_NUM, TXB_NUM, TXB_NUM, TXB_S_L, TXB_S_L, TXB_T_L, TXB_K_L, TXB_P_L, TXB_W_L, TXB_H_L, TXB_R_L, TXB_A_L, TXB_O_L, TXB_STR, TXB_STR, TXB_NUL, TXB_NUL, TXB_NUL, TXB_STR, TXB_STR, TXB_E_R, TXB_U_R, TXB_F_R, TXB_R_R, TXB_P_R, TXB_B_R, TXB_L_R, TXB_G_R, TXB_T_R, TXB_S_R, TXB_D_R, TXB_NUM, TXB_NUM, TXB_NUM, TXB_NUM, TXB_NUM, TXB_NUM, TXB_Z_R};
 
+#ifdef STENO_COMBINEDMAP
+/* Used to look up when pressing the middle row key to combine two consonant or vowel keys */
+static const uint16_t combinedmap_first[] PROGMEM = {STN_S1, STN_TL, STN_PL, STN_HL, STN_FR, STN_PR, STN_LR, STN_TR, STN_DR, STN_A, STN_E};
+static const uint16_t combinedmap_second[] PROGMEM = {STN_S2, STN_KL, STN_WL, STN_RL, STN_RR, STN_BR, STN_GR, STN_SR, STN_ZR, STN_O, STN_U};
+#endif
+
 static void steno_clear_state(void) {
     memset(state, 0, sizeof(state));
     memset(chord, 0, sizeof(chord));
@@ -167,6 +173,15 @@ bool process_steno(uint16_t keycode, keyrecord_t *record) {
             }
             return false;
 
+#ifdef STENO_COMBINEDMAP
+        case QK_STENO_COMB ... QK_STENO_COMB_MAX:
+        {
+            uint8_t result;
+            result = process_steno(combinedmap_first[keycode-QK_STENO_COMB], record);
+            result &= process_steno(combinedmap_second[keycode-QK_STENO_COMB], record);
+            return result;
+        }
+#endif
         case STN__MIN ... STN__MAX:
             if (!process_steno_user(keycode, record)) {
                 return false;
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 3d2dbde922..08ed5a490d 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -66,6 +66,8 @@ enum quantum_keycodes {
     QK_STENO                = 0x5A00,
     QK_STENO_BOLT           = 0x5A30,
     QK_STENO_GEMINI         = 0x5A31,
+    QK_STENO_COMB           = 0x5A32,
+    QK_STENO_COMB_MAX       = 0x5A3C,
     QK_STENO_MAX            = 0x5A3F,
     // 0x5C00 - 0x5FFF are reserved, see below
     QK_MOD_TAP             = 0x6000,