Added Auto Shift, tap key = normal, hold key = shifted state.

5 files changed, 208 insertions, 0 deletions

diff --git a/quantum/process_keycode/process_auto_shift.c b/quantum/process_keycode/process_auto_shift.c
new file mode 100644
index 0000000000..55b5244501
--- /dev/null
+++ b/quantum/process_keycode/process_auto_shift.c
@@ -0,0 +1,168 @@
+/* Copyright 2017 Jeremy Cowgar
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef AUTO_SHIFT_ENABLE
+
+#include <stdio.h>
+
+#include "process_auto_shift.h"
+
+#define TAP(key) \
+  register_code(key); \
+  unregister_code(key)
+
+#define TAP_WITH_MOD(mod, key) \
+  register_code(mod); \
+  register_code(key); \
+  unregister_code(key); \
+  unregister_code(mod)
+
+uint16_t autoshift_time = 0;
+uint16_t autoshift_timeout = AUTO_SHIFT_TIMEOUT;
+uint16_t autoshift_lastkey = KC_NO;
+
+void autoshift_timer_report(void) {
+  char display[8];
+
+  snprintf(display, 8, "\n%d\n", autoshift_timeout);
+
+  send_string((const char *)display);
+}
+
+void autoshift_on(uint16_t keycode) {
+  autoshift_time = timer_read();
+  autoshift_lastkey = keycode;
+}
+
+void autoshift_flush(void) {
+  if (autoshift_lastkey != KC_NO) {
+    uint16_t elapsed = timer_elapsed(autoshift_time);
+
+    if (elapsed > autoshift_timeout) {
+      register_code(KC_LSFT);
+    }
+
+    register_code(autoshift_lastkey);
+    unregister_code(autoshift_lastkey);
+
+    if (elapsed > autoshift_timeout) {
+      unregister_code(KC_LSFT);
+    }
+
+    autoshift_time = 0;
+    autoshift_lastkey = KC_NO;
+  }
+}
+
+bool process_auto_shift(uint16_t keycode, keyrecord_t *record) {
+  static uint8_t any_mod_pressed;
+
+  if (record->event.pressed) {
+    switch (keycode) {
+      case KC_ASUP:
+        autoshift_timeout += 5;
+        return false;
+
+      case KC_ASDN:
+        autoshift_timeout -= 5;
+        return false;
+
+      case KC_ASRP:
+        autoshift_timer_report();
+        return false;
+
+#ifndef NO_AUTO_SHIFT_ALPHA
+      case KC_A:
+      case KC_B:
+      case KC_C:
+      case KC_D:
+      case KC_E:
+      case KC_F:
+      case KC_G:
+      case KC_H:
+      case KC_I:
+      case KC_J:
+      case KC_K:
+      case KC_L:
+      case KC_M:
+      case KC_N:
+      case KC_O:
+      case KC_P:
+      case KC_Q:
+      case KC_R:
+      case KC_S:
+      case KC_T:
+      case KC_U:
+      case KC_V:
+      case KC_W:
+      case KC_X:
+      case KC_Y:
+      case KC_Z:
+#endif
+#ifndef NO_AUTO_SHIFT_NUMERIC
+      case KC_1:
+      case KC_2:
+      case KC_3:
+      case KC_4:
+      case KC_5:
+      case KC_6:
+      case KC_7:
+      case KC_8:
+      case KC_9:
+      case KC_0:
+#endif
+#ifndef NO_AUTO_SHIFT_SPECIAL
+      case KC_TILD:
+      case KC_MINUS:
+      case KC_EQL:
+      case KC_TAB:
+      case KC_LBRC:
+      case KC_RBRC:
+      case KC_BSLS:
+      case KC_SCLN:
+      case KC_QUOT:
+      case KC_COMM:
+      case KC_DOT:
+      case KC_SLSH:
+#endif
+        autoshift_flush();
+
+        any_mod_pressed = get_mods() & (
+          MOD_BIT(KC_LGUI)|MOD_BIT(KC_RGUI)|
+          MOD_BIT(KC_LALT)|MOD_BIT(KC_RALT)|
+          MOD_BIT(KC_LCTL)|MOD_BIT(KC_RCTL)|
+          MOD_BIT(KC_LSFT)|MOD_BIT(KC_RSFT)
+        );
+
+        if (any_mod_pressed) {
+          return true;
+        }
+
+        autoshift_on(keycode);
+        return false;
+
+      default:
+        autoshift_flush();
+        return true;
+    }
+  } else {
+    autoshift_flush();
+  }
+
+  return true;
+}
+
+#endif
diff --git a/quantum/process_keycode/process_auto_shift.h b/quantum/process_keycode/process_auto_shift.h
new file mode 100644
index 0000000000..a0361346bd
--- /dev/null
+++ b/quantum/process_keycode/process_auto_shift.h
@@ -0,0 +1,28 @@
+/* Copyright 2017 Jeremy Cowgar
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PROCESS_AUTO_SHIFT_H
+#define PROCESS_AUTO_SHIFT_H
+
+#include "quantum.h"
+
+#ifndef AUTO_SHIFT_TIMEOUT
+  #define AUTO_SHIFT_TIMEOUT 175
+#endif
+
+bool process_auto_shift(uint16_t keycode, keyrecord_t *record);
+
+#endif
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 1fccaa7d5a..a1a1a9d1cb 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -235,6 +235,9 @@ bool process_record_quantum(keyrecord_t *record) {
   #ifdef PRINTING_ENABLE
     process_printer(keycode, record) &&
   #endif
+  #ifdef AUTO_SHIFT_ENABLE
+    process_auto_shift(keycode, record) &&
+  #endif
   #ifdef UNICODEMAP_ENABLE
     process_unicode_map(keycode, record) &&
   #endif
diff --git a/quantum/quantum.h b/quantum/quantum.h
index f3333a002a..534819c818 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -95,6 +95,10 @@ extern uint32_t default_layer_state;
 	#include "process_printer.h"
 #endif
 
+#ifdef AUTO_SHIFT_ENABLE
+	#include "process_auto_shift.h"
+#endif
+
 #ifdef COMBO_ENABLE
 	#include "process_combo.h"
 #endif
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 26c3c41a73..212fdc67d6 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -121,6 +121,11 @@ enum quantum_keycodes {
     KC_LEAD,
 #endif
 
+    // Auto Shift setup
+    KC_ASUP,
+    KC_ASDN,
+    KC_ASRP,
+
     // Audio on/off/toggle
     AU_ON,
     AU_OFF,