[Keymap] Workman layout for Atreus keyboard (#6606)

keyboards/atreus/keymaps/workman/README.md

@@ -0,0 +1,33 @@
+Workman for Atreus
+==================
+
+This is the Workman layout for Atreus. You can get PDF and SVG files
+for the keymap from the author's
+[website](https://alexschroeder.ch/pdfs/workman/).
+
+```
+  q      d      r      w      b        ||       j      f      u      p      ;
+  a      s      h      t      g        ||       y      n      e      o      i
+  z      x      m      c      v        ||       k      l      ,      .      /
+ esc    tab   super  shift  bksp  ctrl || alt  space   RS     LW     '     ret
+
+
+Raised layer (RS)
+
+  !       @     {      }      |        ||       -      7      8      9      *
+  #       $     (      )      `        ||       .      4      5      6      +
+  %       ^     [      ]      ~        ||       &      1      2      3      \
+ menu    caps   <      >     del       ||       _                    0      =
+
+
+Lower layer (LW)
+
+ insert  home   up    end    pgup      ||      vol+    F7     F8     F9    F10
+  del    left  down  right   pgdn      ||      vol-    F4     F5     F6    F11
+                                       ||      mute    F1     F2     F3    F12
+                                       ||        –                    ¨    reset
+```
+
+A note on the EN DASH and DIARESIS mappings on the lower layer: these
+only work if you set up CAPS as your *Multi Key* because they
+effectively send `<CAPS> - - .` and `<CAPS> "`, respectively.

keyboards/atreus/keymaps/workman/config.h

@@ -0,0 +1,3 @@
+#define TAPPING_TOGGLE 1
+#define ONESHOT_TAP_TOGGLE 1
+#define PCBDOWN 1

keyboards/atreus/keymaps/workman/keymap.c

@@ -0,0 +1,76 @@
+#include QMK_KEYBOARD_H
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+#define _QW 0
+#define _RS 1
+#define _LW 2
+
+#define OSM_SFT OSM(MOD_LSFT)
+
+/* In your system, make sure Caps Lock acts as the Compose Key, also known as the Multi Key. If so, then the quote on
+ * the lower layer acts as macro to enter ¨ */
+enum custom_keycodes {
+	DIAERESIS = SAFE_RANGE,
+	EN_DASH
+};
+
+  /* Basic layer (L0)
+   *  q      d      r      w      b        ||       j      f      u      p      ;
+   *  a      s      h      t      g        ||       y      n      e      o      i
+   *  z      x      m      c      v        ||       k      l      ,      .      /
+   * esc    tab   super  shift  bksp  ctrl || alt  space   RS     LW     '     ret
+   */
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_QW] = LAYOUT( /* Workman */
+    KC_Q,    KC_D,    KC_R,    KC_W,    KC_B,                      KC_J,    KC_F,    KC_U,    KC_P,    KC_SCLN,
+    KC_A,    KC_S,    KC_H,    KC_T,    KC_G,                      KC_Y,    KC_N,    KC_E,    KC_O,    KC_I,
+    KC_Z,    KC_X,    KC_M,    KC_C,    KC_V,                      KC_K,    KC_L,    KC_COMM, KC_DOT,  KC_SLSH,
+    KC_ESC, KC_TAB, KC_LGUI,  OSM_SFT, KC_BSPC,  KC_LCTL, KC_LALT, KC_SPC,  MO(_RS), MO(_LW), KC_QUOT, KC_ENT
+  ),
+
+  /* Raised layer (RS)
+   *  !       @     {      }      |        ||       -      7      8      9      *
+   *  #       $     (      )      `        ||       .      4      5      6      +
+   *  %       ^     [      ]      ~        ||       &      1      2      3      \
+   * menu    caps   <      >     del       ||       _                    0      =
+   */
+
+  [_RS] = LAYOUT( /* [> RAISE <] */
+    KC_EXLM, KC_AT,   KC_LCBR, KC_RCBR, KC_PIPE,                   KC_MINS, KC_7,    KC_8,    KC_9, KC_ASTR,
+    KC_HASH, KC_DLR,  KC_LPRN, KC_RPRN, KC_GRV,                    KC_DOT,  KC_4,    KC_5,    KC_6, KC_PLUS,
+    KC_PERC, KC_CIRC, KC_LBRC, KC_RBRC, KC_TILD,                   KC_AMPR, KC_1,    KC_2,    KC_3, KC_BSLS,
+    KC_MENU, KC_CAPS, KC_LT,   KC_GT,   KC_DEL,  KC_TRNS, KC_TRNS, KC_UNDS, KC_TRNS, KC_TRNS,  KC_0, KC_EQL ),
+
+  /* Lower layer (LW)
+   * insert  home   up    end    pgup      ||      vol+    F7     F8     F9    F10
+   *  del    left  down  right   pgdn      ||      vol-    F4     F5     F6    F11
+   *                                       ||      mute    F1     F2     F3    F12
+   *                                       ||        –                    ¨    reset
+   */
+
+  [_LW] = LAYOUT( /* [> LOWER <] */
+    KC_INS,  KC_HOME, KC_UP,   KC_END,  KC_PGUP,                   KC_VOLU, KC_F7,   KC_F8,   KC_F9,   KC_F10,
+    KC_DELT, KC_LEFT, KC_DOWN, KC_RGHT, KC_PGDN,                   KC_VOLD, KC_F4,   KC_F5,   KC_F6,   KC_F11,
+    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_MUTE, KC_F1,   KC_F2,   KC_F3,   KC_F12,
+    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, EN_DASH, KC_TRNS, KC_TRNS, DIAERESIS, RESET  )
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    if (record->event.pressed) {
+        switch(keycode) {
+		case DIAERESIS:
+			// assuming KC_CAPS is your Multi Key
+			SEND_STRING(SS_TAP(X_CAPSLOCK)"\"");
+			return false;
+		case EN_DASH:
+			// assuming KC_CAPS is your Multi Key
+			SEND_STRING(SS_TAP(X_CAPSLOCK)"--.");
+			return false;
+        }
+    }
+    return true;
+};