[Keymap] Jarred's Plaid keymap (#6049)

[qmk_firmware.git] / docs / feature_tap_dance.md

diff --git a/docs/feature_tap_dance.md b/docs/feature_tap_dance.md
index 0521826b25ffd8744a3ffeae7ad139da2602f60b..b5e5218b093d01c7ad8c99bf79c76efbebf2d345 100644 (file)
--- a/docs/feature_tap_dance.md
+++ b/docs/feature_tap_dance.md
@@ -6,9 +6,9 @@ Hit the semicolon key once, send a semicolon. Hit it twice, rapidly -- send a co
 
 With this feature one can specify keys that behave differently, based on the amount of times they have been tapped, and when interrupted, they get handled before the interrupter.
 
 
 With this feature one can specify keys that behave differently, based on the amount of times they have been tapped, and when interrupted, they get handled before the interrupter.
 

-To make it clear how this is different from `ACTION_FUNCTION_TAP`, lets explore a certain setup! We want one key to send `Space` on single tap, but `Enter` on double-tap.
+To make it clear how this is different from `ACTION_FUNCTION_TAP`, let's explore a certain setup! We want one key to send `Space` on single tap, but `Enter` on double-tap.

 
 

-With `ACTION_FUNCTION_TAP`, it is quite a rain-dance to set this up, and has the problem that when the sequence is interrupted, the interrupting key will be send first. Thus, `SPC a` will result in `a SPC` being sent, if they are typed within `TAPPING_TERM`. With the tap dance feature, that'll come out as `SPC a`, correctly.
+With `ACTION_FUNCTION_TAP`, it is quite a rain-dance to set this up, and has the problem that when the sequence is interrupted, the interrupting key will be sent first. Thus, `SPC a` will result in `a SPC` being sent, if they are typed within `TAPPING_TERM`. With the tap dance feature, that'll come out as `SPC a`, correctly.

 
 The implementation hooks into two parts of the system, to achieve this: into `process_record_quantum()`, and the matrix scan. We need the latter to be able to time out a tap sequence even when a key is not being pressed, so `SPC` alone will time out and register after `TAPPING_TERM` time.
 
 
 The implementation hooks into two parts of the system, to achieve this: into `process_record_quantum()`, and the matrix scan. We need the latter to be able to time out a tap sequence even when a key is not being pressed, so `SPC` alone will time out and register after `TAPPING_TERM` time.
 


@@ -16,14 +16,18 @@ But lets start with how to use it, first!
 
 First, you will need `TAP_DANCE_ENABLE=yes` in your `rules.mk`, because the feature is disabled by default. This adds a little less than 1k to the firmware size. Next, you will want to define some tap-dance keys, which is easiest to do with the `TD()` macro, that - similar to `F()`, takes a number, which will later be used as an index into the `tap_dance_actions` array.
 
 
 First, you will need `TAP_DANCE_ENABLE=yes` in your `rules.mk`, because the feature is disabled by default. This adds a little less than 1k to the firmware size. Next, you will want to define some tap-dance keys, which is easiest to do with the `TD()` macro, that - similar to `F()`, takes a number, which will later be used as an index into the `tap_dance_actions` array.
 

-This array specifies what actions shall be taken when a tap-dance key is in action. Currently, there are three possible options:
+This array specifies what actions shall be taken when a tap-dance key is in action. Currently, there are five possible options:

 
 * `ACTION_TAP_DANCE_DOUBLE(kc1, kc2)`: Sends the `kc1` keycode when tapped once, `kc2` otherwise. When the key is held, the appropriate keycode is registered: `kc1` when pressed and held, `kc2` when tapped once, then pressed and held.
 
 * `ACTION_TAP_DANCE_DOUBLE(kc1, kc2)`: Sends the `kc1` keycode when tapped once, `kc2` otherwise. When the key is held, the appropriate keycode is registered: `kc1` when pressed and held, `kc2` when tapped once, then pressed and held.

+* `ACTION_TAP_DANCE_DUAL_ROLE(kc, layer)`: Sends the `kc` keycode when tapped once, or moves to `layer`. (this functions like the `TO` layer keycode).

 * `ACTION_TAP_DANCE_FN(fn)`: Calls the specified function - defined in the user keymap - with the final tap count of the tap dance action.
 * `ACTION_TAP_DANCE_FN(fn)`: Calls the specified function - defined in the user keymap - with the final tap count of the tap dance action.

-* `ACTION_TAP_DANCE_FN_ADVANCED(on_each_tap_fn, on_dance_finished_fn, on_dance_reset_fn)`: Calls the first specified function - defined in the user keymap - on every tap, the second function on when the dance action finishes (like the previous option), and the last function when the tap dance action resets.
+* `ACTION_TAP_DANCE_FN_ADVANCED(on_each_tap_fn, on_dance_finished_fn, on_dance_reset_fn)`: Calls the first specified function - defined in the user keymap - on every tap, the second function when the dance action finishes (like the previous option), and the last function when the tap dance action resets.
+* `ACTION_TAP_DANCE_FN_ADVANCED_TIME(on_each_tap_fn, on_dance_finished_fn, on_dance_reset_fn, tap_specific_tapping_term)`: This functions identically to the `ACTION_TAP_DANCE_FN_ADVANCED` function, but uses a custom tapping term for it, instead of the predefined `TAPPING_TERM`.

 
 The first option is enough for a lot of cases, that just want dual roles. For example, `ACTION_TAP_DANCE_DOUBLE(KC_SPC, KC_ENT)` will result in `Space` being sent on single-tap, `Enter` otherwise.
 
 
 The first option is enough for a lot of cases, that just want dual roles. For example, `ACTION_TAP_DANCE_DOUBLE(KC_SPC, KC_ENT)` will result in `Space` being sent on single-tap, `Enter` otherwise.
 

+!> Keep in mind that only [basic keycodes](keycodes_basic.md) are supported here. Custom keycodes are not supported.
+

 And that's the bulk of it!
 
 And now, on to the explanation of how it works!
 And that's the bulk of it!
 
 And now, on to the explanation of how it works!


@@ -179,42 +183,98 @@ Below is a specific example:
 *  Double Tap = Send `Escape`
 *  Double Tap and Hold = Send `Alt`
 
 *  Double Tap = Send `Escape`
 *  Double Tap and Hold = Send `Alt`
 

-The following example can be easily expanded to more than 4 quite easily:
+## Setup
+
+You will need a few things that can be used for 'Quad Function Tap-Dance'. 
+
+You'll need to add these to the top of your `keymap.c` file, before your keymap. 
+

 ```c
 ```c

-//**************** Definitions needed for quad function to work *********************//
-//Enums used to clearly convey the state of the tap dance
+typedef struct {
+  bool is_press_action;
+  int state;
+} tap;
+

 enum {
   SINGLE_TAP = 1,
   SINGLE_HOLD = 2,
   DOUBLE_TAP = 3,
   DOUBLE_HOLD = 4,
 enum {
   SINGLE_TAP = 1,
   SINGLE_HOLD = 2,
   DOUBLE_TAP = 3,
   DOUBLE_HOLD = 4,

-  DOUBLE_SINGLE_TAP = 5 //send SINGLE_TAP twice - NOT DOUBLE_TAP
-  // Add more enums here if you want for triple, quadruple, etc.
+  DOUBLE_SINGLE_TAP = 5, //send two single taps
+  TRIPLE_TAP = 6,
+  TRIPLE_HOLD = 7

 };
 
 };
 

-typedef struct {
-  bool is_press_action;
-  int state;
-} tap;
+//Tap dance enums
+enum {
+  X_CTL = 0,
+  SOME_OTHER_DANCE
+};

 
 

+int cur_dance (qk_tap_dance_state_t *state);
+
+//for the x tap dance. Put it here so it can be used in any keymap
+void x_finished (qk_tap_dance_state_t *state, void *user_data);
+void x_reset (qk_tap_dance_state_t *state, void *user_data);
+
+```
+
+Now, at the bottom of your `keymap.c` file, you'll need to add the following: 
+
+```c
+/* 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 cur_dance (qk_tap_dance_state_t *state) {
   if (state->count == 1) {
 int cur_dance (qk_tap_dance_state_t *state) {
   if (state->count == 1) {

-    //If count = 1, and it has been interrupted - it doesn't matter if it is pressed or not: Send SINGLE_TAP
-    if (state->interrupted || state->pressed==0) return SINGLE_TAP;
+    if (state->interrupted || !state->pressed)  return SINGLE_TAP;
+    //key has not been interrupted, but they key is still held. Means you want to send a 'HOLD'.

     else return SINGLE_HOLD;
   }
     else return SINGLE_HOLD;
   }

-  //If count = 2, and it has been interrupted - assume that user is trying to type the letter associated
-  //with single tap. In example below, that means to send `xx` instead of `Escape`.

   else if (state->count == 2) {
   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) return DOUBLE_SINGLE_TAP;
     else if (state->pressed) return DOUBLE_HOLD;
     else return DOUBLE_TAP;
   }
     if (state->interrupted) return DOUBLE_SINGLE_TAP;
     else if (state->pressed) return DOUBLE_HOLD;
     else return DOUBLE_TAP;
   }

-  else return 6; //magic number. At some point this method will expand to work for more presses
+  //Assumes no one is trying to type the same letter three times (at least not quickly).
+  //If your tap dance key is 'KC_W', and you want to type "www." quickly - then you will need to add
+  //an exception here to return a 'TRIPLE_SINGLE_TAP', and define that enum just like 'DOUBLE_SINGLE_TAP'
+  if (state->count == 3) {
+    if (state->interrupted || !state->pressed)  return TRIPLE_TAP;
+    else return TRIPLE_HOLD;
+  }
+  else return 8; //magic number. At some point this method will expand to work for more presses

 }
 
 }
 

-//**************** Definitions needed for quad function to work *********************//
-

 //instanalize an instance of 'tap' for the 'x' tap dance.
 static tap xtap_state = {
   .is_press_action = true,
 //instanalize an instance of 'tap' for the 'x' tap dance.
 static tap xtap_state = {
   .is_press_action = true,


@@ -245,6 +305,95 @@ void x_reset (qk_tap_dance_state_t *state, void *user_data) {
   }
   xtap_state.state = 0;
 }
   }
   xtap_state.state = 0;
 }

+
+qk_tap_dance_action_t tap_dance_actions[] = {
+  [X_CTL]     = ACTION_TAP_DANCE_FN_ADVANCED(NULL,x_finished, x_reset)
+};

 ```
 ```

-And then simply add this to your list of tap dance functions:
-`[X_TAP_DANCE] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, x_finished, x_reset)`
+
+And then simply use `TD(X_CTL)` anywhere in your keymap.
+
+If you want to implement this in your userspace, then you may want to check out how [DanielGGordon](https://github.com/qmk/qmk_firmware/tree/master/users/gordon) has implemented this in their userspace.
+
+### Example 5: Using tap dance for advanced mod-tap and layer-tap keys
+
+Tap dance can be used to emulate `MT()` and `LT()` behavior when the tapped code is not a basic keycode. This is useful to send tapped keycodes that normally require `Shift`, such as parentheses or curly braces—or other modified keycodes, such as `Control + X`.
+
+Below your layers and custom keycodes, add the following:
+
+```c
+// tapdance keycodes
+enum td_keycodes {
+  ALT_LP // Our example key: `LALT` when held, `(` when tapped. Add additional keycodes for each tapdance.
+};
+
+// define a type containing as many tapdance states as you need
+typedef enum {
+  SINGLE_TAP,
+  SINGLE_HOLD,
+  DOUBLE_SINGLE_TAP
+} td_state_t;
+
+// create a global instance of the tapdance state type
+static td_state_t td_state;
+
+// declare your tapdance functions:
+
+// function to determine the current tapdance state
+int cur_dance (qk_tap_dance_state_t *state);
+
+// `finished` and `reset` functions for each tapdance keycode
+void altlp_finished (qk_tap_dance_state_t *state, void *user_data);
+void altlp_reset (qk_tap_dance_state_t *state, void *user_data);
+```
+
+Below your `LAYOUT`, define each of the tapdance functions:
+
+```c
+// determine the tapdance state to return
+int cur_dance (qk_tap_dance_state_t *state) {
+  if (state->count == 1) {
+    if (state->interrupted || !state->pressed) { return SINGLE_TAP; }
+    else { return SINGLE_HOLD; }
+  }
+  if (state->count == 2) { return DOUBLE_SINGLE_TAP; }
+  else { return 3; } // any number higher than the maximum state value you return above
+}
+ 
+// handle the possible states for each tapdance keycode you define:
+
+void altlp_finished (qk_tap_dance_state_t *state, void *user_data) {
+  td_state = cur_dance(state);
+  switch (td_state) {
+    case SINGLE_TAP:
+      register_code16(KC_LPRN);
+      break;
+    case SINGLE_HOLD:
+      register_mods(MOD_BIT(KC_LALT)); // for a layer-tap key, use `layer_on(_MY_LAYER)` here
+      break;
+    case DOUBLE_SINGLE_TAP: // allow nesting of 2 parens `((` within tapping term
+      tap_code16(KC_LPRN);
+      register_code16(KC_LPRN);
+  }
+}
+
+void altlp_reset (qk_tap_dance_state_t *state, void *user_data) {
+  switch (td_state) {
+    case SINGLE_TAP:
+      unregister_code16(KC_LPRN);
+      break;
+    case SINGLE_HOLD:
+      unregister_mods(MOD_BIT(KC_LALT)); // for a layer-tap key, use `layer_off(_MY_LAYER)` here
+      break;
+    case DOUBLE_SINGLE_TAP:
+      unregister_code16(KC_LPRN);
+  }
+}
+
+// define `ACTION_TAP_DANCE_FN_ADVANCED()` for each tapdance keycode, passing in `finished` and `reset` functions
+qk_tap_dance_action_t tap_dance_actions[] = {
+  [ALT_LP] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, altlp_finished, altlp_reset)
+};
+```
+
+Wrap each tapdance keycode in `TD()` when including it in your keymap, e.g. `TD(ALT_LP)`.