1 files changed, 75 insertions, 0 deletions
diff --git a/keyboards/ergodox_ez/keymaps/hacker_dvorak/tap_dance/tap_dance_setup.c b/keyboards/ergodox_ez/keymaps/hacker_dvorak/tap_dance/tap_dance_setup.c
new file mode 100644
index 000000000..340ccca13
--- /dev/null
+++ b/keyboards/ergodox_ez/keymaps/hacker_dvorak/tap_dance/tap_dance_setup.c
@@ -0,0 +1,75 @@
+typedef struct {
+    bool is_press_action;
+    int state;
+} tap;
+
+enum {
+    SINGLE_TAP        = 1,
+    SINGLE_HOLD       = 2,
+    DOUBLE_TAP        = 3,
+    DOUBLE_HOLD       = 4,
+    DOUBLE_SINGLE_TAP = 5,  // Send two single taps.
+    TRIPLE_TAP        = 6,
+    TRIPLE_HOLD       = 7,
+    TRIPLE_SINGLE_TAP = 8   // Send three single taps.
+};
+
+/* Return an integer that corresponds to what kind of tap dance should be executed.
+ *
+ * How to figure out tap dance state: interrupted and pressed.
+ *
+ * Interrupted: If the state of a dance dance is "interrupted", that means that another key has been hit
+ *  under the tapping term. This is typically indicitive that you are trying to "tap" the key.
+ *
+ * Pressed: Whether or not the key is still being pressed. If this value is true, that means the tapping term
+ *  has ended, but the key is still being pressed down. This generally means the key is being "held".
+ *
+ * One thing that is currenlty not possible with qmk software in regards to tap dance is to mimic the "permissive hold"
+ *  feature. In general, advanced tap dances do not work well if they are used with commonly typed letters.
+ *  For example "A". Tap dances are best used on non-letter keys that are not hit while typing letters.
+ *
+ * Good places to put an advanced tap dance:
+ *  z,q,x,j,k,v,b, any function key, home/end, comma, semi-colon
+ *
+ * Criteria for "good placement" of a tap dance key:
+ *  Not a key that is hit frequently in a sentence
+ *  Not a key that is used frequently to double tap, for example 'tab' is often double tapped in a terminal, or
+ *    in a web form. So 'tab' would be a poor choice for a tap dance.
+ *  Letters used in common words as a double. For example 'p' in 'pepper'. If a tap dance function existed on the
+ *    letter 'p', the word 'pepper' would be quite frustating to type.
+ *
+ * For the third point, there does exist the 'DOUBLE_SINGLE_TAP', however this is not fully tested
+ *
+ */
+int current_dance(qk_tap_dance_state_t *state) {
+    int current_state = 0;
+    if (state->count == 1) {
+        if (state->interrupted || !state->pressed) {
+            current_state = SINGLE_TAP;
+        } else {
+            current_state = SINGLE_HOLD; //key has not been interrupted, but they key is still held. Means you want to send a 'HOLD'.
+        }
+    } else if (state->count == 2) {
+        /*
+         * DOUBLE_SINGLE_TAP is to distinguish between typing "pepper", and actually wanting a double tap
+         * action when hitting 'pp'. Suggested use case for this return value is when you want to send two
+         * keystrokes of the key, and not the 'double tap' action/macro.
+        */
+        if (state->interrupted) {
+            current_state = DOUBLE_SINGLE_TAP;
+        } else if (state->pressed) {
+            current_state = DOUBLE_HOLD;
+        } else {
+            current_state = DOUBLE_TAP;
+        }
+    } else if (state->count == 3) {
+        if (state->interrupted) {
+            current_state = TRIPLE_SINGLE_TAP;
+        } else if (state->pressed) {
+            current_state = TRIPLE_HOLD;
+        } else {
+            current_state = TRIPLE_TAP;
+        }
+    }
+    return current_state;
+}