From aab9c1a4f4a45dc18ddad614f5914bbb5cc19488 Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@dailly.me>
Date: Thu, 1 Feb 2024 21:14:00 +0100
Subject: QMK: Made some key change depending of the previous keys pressed.

---
 qmk/keyboards/sofle_choc/keymaps/custom/keycodes.c | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/qmk/keyboards/sofle_choc/keymaps/custom/keycodes.c b/qmk/keyboards/sofle_choc/keymaps/custom/keycodes.c
index bd091bb..069f5e2 100644
--- a/qmk/keyboards/sofle_choc/keymaps/custom/keycodes.c
+++ b/qmk/keyboards/sofle_choc/keymaps/custom/keycodes.c
@@ -97,8 +97,21 @@ uint16_t get_tapping_term(uint16_t keycode, keyrecord_t *record) {
     }
 }
 
+static uint32_t key_timer;           // timer for last keyboard activity, use
+                                     // 32bit value and function to make longer
+                                     // idle time possible
+static uint16_t latest_key;
 
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+
+
+  if (!record->event.pressed) {
+      // store time of last key release. This is used as a counter in order to
+      // know if we are inside a typing sequence or not.
+      key_timer = timer_read32();
+      latest_key = keycode;
+  }
+
   switch (keycode) {
     case AL_ENT:
       if (layer_state_is(LAYER_SYMBOLS) && !record->event.pressed) {
@@ -106,6 +119,33 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
           layer_clear();
       }
       return true; // Let QMK send the enter press/release events
+    // If a key where released just before, consider we are typing some text
+    // and not starting a new sequence 
+    case KEY_E:
+      if (record->event.pressed && timer_elapsed32(key_timer) < TAPPING_TERM) {
+          register_code(BP_E);
+          return false;
+      }
+      return true;
+    case KEY_T:
+      if (record->event.pressed && timer_elapsed32(key_timer) < TAPPING_TERM) {
+          register_code(BP_T);
+          return false;
+      }
+      return true;
+    // Here, the key KC_BSPC become È when used inside a sequence, but we still
+    // allow the repetition of KC_BSPC.
+    case KC_BSPC:
+      if (record->event.pressed \
+              && timer_elapsed32(key_timer) < TAPPING_TERM \
+              && latest_key != keycode)
+      {
+          // I completely rewrite the key here, that’s why I’m using tap_code16
+          // instead of register_code.
+          tap_code16(BP_EGRV);
+          return false;
+      }
+      return true;
     default:
       return true; // Process all other keycodes normally
   }
-- 
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