12 files changed, 319 insertions, 6 deletions
diff --git a/quantum/keymap_extras/keymap_br_abnt2.h b/quantum/keymap_extras/keymap_br_abnt2.h
index 0df177721d..b001139dd4 100644
--- a/quantum/keymap_extras/keymap_br_abnt2.h
+++ b/quantum/keymap_extras/keymap_br_abnt2.h
@@ -1,3 +1,19 @@
+/* Copyright 2017 Potiguar Faga
+ *
+ * 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 KEYMAP_BR_ABNT2_H
 #define KEYMAP_BR_ABNT2_H
 
diff --git a/quantum/process_keycode/process_combo.c b/quantum/process_keycode/process_combo.c
new file mode 100644
index 0000000000..e2189ad98b
--- /dev/null
+++ b/quantum/process_keycode/process_combo.c
@@ -0,0 +1,134 @@
+#include "process_combo.h"
+#include "print.h"
+
+
+#define COMBO_TIMER_ELAPSED -1
+
+
+__attribute__ ((weak))
+combo_t key_combos[] = {
+
+};
+
+__attribute__ ((weak))
+void process_combo_event(uint8_t combo_index, bool pressed) {
+
+}
+
+static uint8_t current_combo_index = 0;
+
+static inline void send_combo(uint16_t action, bool pressed)
+{
+    if (action) {
+        if (pressed) {
+            register_code16(action);
+        } else {
+            unregister_code16(action);
+        }
+    } else {
+        process_combo_event(current_combo_index, pressed);
+    }
+}
+
+#define ALL_COMBO_KEYS_ARE_DOWN     (((1<<count)-1) == combo->state)
+#define NO_COMBO_KEYS_ARE_DOWN      (0 == combo->state)
+#define KEY_STATE_DOWN(key)         do{ combo->state |= (1<<key); } while(0)
+#define KEY_STATE_UP(key)           do{ combo->state &= ~(1<<key); } while(0)
+static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record) 
+{
+    uint8_t count = 0;
+    uint8_t index = -1;
+    /* Find index of keycode and number of combo keys */
+    for (const uint16_t *keys = combo->keys; ;++count) {
+        uint16_t key = pgm_read_word(&keys[count]);
+        if (keycode == key) index = count;
+        if (COMBO_END == key) break;
+    }
+
+    /* Return if not a combo key */
+    if (-1 == (int8_t)index) return false;
+
+    /* The combos timer is used to signal whether the combo is active */
+    bool is_combo_active = COMBO_TIMER_ELAPSED == combo->timer ? false : true;
+
+    if (record->event.pressed) {
+        KEY_STATE_DOWN(index);
+
+        if (is_combo_active) {
+            if (ALL_COMBO_KEYS_ARE_DOWN) { /* Combo was pressed */
+                send_combo(combo->keycode, true);
+                combo->timer = COMBO_TIMER_ELAPSED;
+            } else { /* Combo key was pressed */
+                combo->timer = timer_read();
+#ifdef COMBO_ALLOW_ACTION_KEYS
+                combo->prev_record = *record;
+#else
+                combo->prev_key = keycode;
+#endif
+            }
+        }
+    } else {
+        if (ALL_COMBO_KEYS_ARE_DOWN) { /* Combo was released */
+            send_combo(combo->keycode, false);
+        }
+
+        if (is_combo_active) { /* Combo key was tapped */
+#ifdef COMBO_ALLOW_ACTION_KEYS
+            record->event.pressed = true;
+            process_action(record, store_or_get_action(record->event.pressed, record->event.key));
+            record->event.pressed = false;
+            process_action(record, store_or_get_action(record->event.pressed, record->event.key));
+#else
+            register_code16(keycode);
+            send_keyboard_report();
+            unregister_code16(keycode);
+#endif
+            combo->timer = 0;            
+        }
+
+        KEY_STATE_UP(index);        
+    }
+
+    if (NO_COMBO_KEYS_ARE_DOWN) {
+        combo->timer = 0;
+    }
+
+    return is_combo_active;
+}
+
+bool process_combo(uint16_t keycode, keyrecord_t *record)
+{
+    bool is_combo_key = false;
+
+    for (current_combo_index = 0; current_combo_index < COMBO_COUNT; ++current_combo_index) {
+        combo_t *combo = &key_combos[current_combo_index];
+        is_combo_key |= process_single_combo(combo, keycode, record);
+    }    
+
+    return !is_combo_key;
+}
+
+void matrix_scan_combo(void)
+{
+    for (int i = 0; i < COMBO_COUNT; ++i) {
+        combo_t *combo = &key_combos[i];
+        if (combo->timer && 
+            combo->timer != COMBO_TIMER_ELAPSED && 
+            timer_elapsed(combo->timer) > COMBO_TERM) {
+            
+            /* This disables the combo, meaning key events for this
+             * combo will be handled by the next processors in the chain 
+             */
+            combo->timer = COMBO_TIMER_ELAPSED;
+
+#ifdef COMBO_ALLOW_ACTION_KEYS
+            process_action(&combo->prev_record, 
+                store_or_get_action(combo->prev_record.event.pressed, 
+                                    combo->prev_record.event.key));
+#else
+            unregister_code16(combo->prev_key);
+            register_code16(combo->prev_key);
+#endif
+        }
+    }
+}
diff --git a/quantum/process_keycode/process_combo.h b/quantum/process_keycode/process_combo.h
new file mode 100644
index 0000000000..847f2b7376
--- /dev/null
+++ b/quantum/process_keycode/process_combo.h
@@ -0,0 +1,43 @@
+#ifndef PROCESS_COMBO_H
+#define PROCESS_COMBO_H
+
+#include <stdint.h>
+#include "progmem.h"
+#include "quantum.h"
+
+typedef struct
+{
+    const uint16_t *keys;
+    uint16_t keycode;        
+#ifdef EXTRA_EXTRA_LONG_COMBOS
+    uint32_t state;
+#elif EXTRA_LONG_COMBOS
+    uint16_t state;
+#else
+    uint8_t state;
+#endif
+    uint16_t timer;
+#ifdef COMBO_ALLOW_ACTION_KEYS
+    keyrecord_t prev_record;
+#else
+    uint16_t prev_key;
+#endif
+} combo_t;
+
+
+#define COMBO(ck, ca)       {.keys = &(ck)[0], .keycode = (ca)}
+#define COMBO_ACTION(ck)    {.keys = &(ck)[0]}
+
+#define COMBO_END 0
+#ifndef COMBO_COUNT
+#define COMBO_COUNT 0
+#endif
+#ifndef COMBO_TERM
+#define COMBO_TERM TAPPING_TERM
+#endif
+
+bool process_combo(uint16_t keycode, keyrecord_t *record);
+void matrix_scan_combo(void);
+void process_combo_event(uint8_t combo_index, bool pressed);
+
+#endif
diff --git a/quantum/process_keycode/process_music.c b/quantum/process_keycode/process_music.c
index ca68bef6c8..1e2648bff5 100644
--- a/quantum/process_keycode/process_music.c
+++ b/quantum/process_keycode/process_music.c
@@ -114,6 +114,7 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
             music_sequence_interval+=10;
         return false;
       }
+      #define MUSIC_MODE_GUITAR
 
       #ifdef MUSIC_MODE_CHROMATIC
       float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + record->event.key.col + music_offset)/12.0+(MATRIX_ROWS - record->event.key.row));
diff --git a/quantum/process_keycode/process_tap_dance.c b/quantum/process_keycode/process_tap_dance.c
index 6ae362c4c2..403dca5380 100644
--- a/quantum/process_keycode/process_tap_dance.c
+++ b/quantum/process_keycode/process_tap_dance.c
@@ -43,12 +43,16 @@ static inline void process_tap_dance_action_on_dance_finished (qk_tap_dance_acti
   if (action->state.finished)
     return;
   action->state.finished = true;
+  add_mods(action->state.oneshot_mods);
+  send_keyboard_report();
   _process_tap_dance_action_fn (&action->state, action->user_data, action->fn.on_dance_finished);
 }
 
 static inline void process_tap_dance_action_on_reset (qk_tap_dance_action_t *action)
 {
   _process_tap_dance_action_fn (&action->state, action->user_data, action->fn.on_reset);
+  del_mods(action->state.oneshot_mods);
+  send_keyboard_report();
 }
 
 bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
@@ -70,6 +74,7 @@ bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
       action->state.keycode = keycode;
       action->state.count++;
       action->state.timer = timer_read();
+      action->state.oneshot_mods = get_oneshot_mods();
       process_tap_dance_action_on_each_tap (action);
 
       if (last_td && last_td != keycode) {
@@ -109,7 +114,7 @@ void matrix_scan_tap_dance () {
   if (highest_td == -1)
     return;
 
-  for (int i = 0; i <= highest_td; i++) {
+for (int i = 0; i <= highest_td; i++) {
     qk_tap_dance_action_t *action = &tap_dance_actions[i];
 
     if (action->state.count && timer_elapsed (action->state.timer) > TAPPING_TERM) {
diff --git a/quantum/process_keycode/process_tap_dance.h b/quantum/process_keycode/process_tap_dance.h
index f753cbba66..726752ecc7 100644
--- a/quantum/process_keycode/process_tap_dance.h
+++ b/quantum/process_keycode/process_tap_dance.h
@@ -9,6 +9,7 @@
 typedef struct
 {
   uint8_t count;
+  uint8_t oneshot_mods;
   uint16_t keycode;
   uint16_t timer;
   bool interrupted;
diff --git a/quantum/process_keycode/process_unicode.c b/quantum/process_keycode/process_unicode.c
index a30e93ae32..9995ba9bde 100644
--- a/quantum/process_keycode/process_unicode.c
+++ b/quantum/process_keycode/process_unicode.c
@@ -141,7 +141,16 @@ bool process_unicode_map(uint16_t keycode, keyrecord_t *record) {
     const uint32_t* map = unicode_map;
     uint16_t index = keycode & 0x7FF;
     uint32_t code = pgm_read_dword_far(&map[index]);
-    if ((code > 0xFFFF && input_mode == UC_OSX) || (code > 0xFFFFF && input_mode == UC_LNX)) {
+    if (code > 0xFFFF && code <= 0x10ffff && input_mode == UC_OSX) {
+      // Convert to UTF-16 surrogate pair
+      code -= 0x10000;
+      uint32_t lo = code & 0x3ff;
+      uint32_t hi = (code & 0xffc00) >> 10;
+      unicode_input_start();
+      register_hex32(hi + 0xd800);
+      register_hex32(lo + 0xdc00);
+      unicode_input_finish();
+    } else if ((code > 0x10ffff && input_mode == UC_OSX) || (code > 0xFFFFF && input_mode == UC_LNX)) {
       // when character is out of range supported by the OS
       unicode_map_input_error();
     } else {
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 63ffe2074e..b83ae433e3 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -33,14 +33,42 @@ static void do_code16 (uint16_t code, void (*f) (uint8_t)) {
     f(KC_RGUI);
 }
 
+static inline void qk_register_weak_mods(uint8_t kc) {
+    add_weak_mods(MOD_BIT(kc));
+    send_keyboard_report();
+}
+
+static inline void qk_unregister_weak_mods(uint8_t kc) {
+    del_weak_mods(MOD_BIT(kc));
+    send_keyboard_report();
+}
+
+static inline void qk_register_mods(uint8_t kc) {
+    add_weak_mods(MOD_BIT(kc));
+    send_keyboard_report();
+}
+
+static inline void qk_unregister_mods(uint8_t kc) {
+    del_weak_mods(MOD_BIT(kc));
+    send_keyboard_report();
+}
+
 void register_code16 (uint16_t code) {
-  do_code16 (code, register_code);
+  if (IS_MOD(code) || code == KC_NO) {
+      do_code16 (code, qk_register_mods);
+  } else {
+      do_code16 (code, qk_register_weak_mods);
+  }
   register_code (code);
 }
 
 void unregister_code16 (uint16_t code) {
   unregister_code (code);
-  do_code16 (code, unregister_code);
+  if (IS_MOD(code) || code == KC_NO) {
+      do_code16 (code, qk_unregister_mods);
+  } else {
+      do_code16 (code, qk_unregister_weak_mods);
+  }
 }
 
 __attribute__ ((weak))
@@ -130,6 +158,9 @@ bool process_record_quantum(keyrecord_t *record) {
   #ifndef DISABLE_CHORDING
     process_chording(keycode, record) &&
   #endif
+  #ifdef COMBO_ENABLE
+    process_combo(keycode, record) &&
+  #endif
   #ifdef UNICODE_ENABLE
     process_unicode(keycode, record) &&
   #endif
@@ -508,6 +539,11 @@ void matrix_scan_quantum() {
   #ifdef TAP_DANCE_ENABLE
     matrix_scan_tap_dance();
   #endif
+
+  #ifdef COMBO_ENABLE
+    matrix_scan_combo();
+  #endif
+
   matrix_scan_kb();
 }
 
diff --git a/quantum/quantum.h b/quantum/quantum.h
index e6adf974ab..8614c053ab 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -63,6 +63,10 @@ extern uint32_t default_layer_state;
 	#include "process_printer.h"
 #endif
 
+#ifdef COMBO_ENABLE
+	#include "process_combo.h"
+#endif
+
 #define SEND_STRING(str) send_string(PSTR(str))
 void send_string(const char *str);
 
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 4853655f95..91324be35d 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -290,6 +290,7 @@ enum quantum_keycodes {
 #define CTL_T(kc) MT(MOD_LCTL, kc)
 #define SFT_T(kc) MT(MOD_LSFT, kc)
 #define ALT_T(kc) MT(MOD_LALT, kc)
+#define ALGR_T(kc) MT(MOD_RALT, kc) // dual-function AltGR
 #define GUI_T(kc) MT(MOD_LGUI, kc)
 #define C_S_T(kc) MT((MOD_LCTL | MOD_LSFT), kc) // Control + Shift e.g. for gnome-terminal
 #define MEH_T(kc) MT((MOD_LCTL | MOD_LSFT | MOD_LALT), kc) // Meh is a less hyper version of the Hyper key -- doesn't include Win or Cmd, so just alt+shift+ctrl
diff --git a/quantum/visualizer/visualizer.c b/quantum/visualizer/visualizer.c
index 54f6faaa42..5826d909e4 100644
--- a/quantum/visualizer/visualizer.c
+++ b/quantum/visualizer/visualizer.c
@@ -53,10 +53,13 @@ SOFTWARE.
 #define "Visualizer thread priority not defined"
 #endif
 
+// mods status
+#include "action_util.h"
 
 static visualizer_keyboard_status_t current_status = {
     .layer = 0xFFFFFFFF,
     .default_layer = 0xFFFFFFFF,
+    .mods = 0xFF,
     .leds = 0xFFFFFFFF,
     .suspended = false,
 };
@@ -64,6 +67,7 @@ static visualizer_keyboard_status_t current_status = {
 static bool same_status(visualizer_keyboard_status_t* status1, visualizer_keyboard_status_t* status2) {
     return status1->layer == status2->layer &&
         status1->default_layer == status2->default_layer &&
+        status1->mods == status2->mods &&
         status1->leds == status2->leds &&
         status1->suspended == status2->suspended;
 }
@@ -307,6 +311,45 @@ bool keyframe_display_layer_bitmap(keyframe_animation_t* animation, visualizer_s
     gdispFlush();
     return false;
 }
+
+static void format_mods_bitmap_string(uint8_t mods, char* buffer) {
+    *buffer = ' ';
+    ++buffer;
+
+    for (int i = 0; i<8; i++)
+    {
+        uint32_t mask = (1u << i);
+        if (mods & mask) {
+            *buffer = '1';
+        } else {
+            *buffer = '0';
+        }
+        ++buffer;
+
+        if (i==3) {
+            *buffer = ' ';
+            ++buffer;
+        }
+    }
+    *buffer = 0;
+}
+
+bool keyframe_display_mods_bitmap(keyframe_animation_t* animation, visualizer_state_t* state) {
+    (void)animation;
+
+    const char* title = "Modifier states";
+    const char* mods_header = " CSAG CSAG ";
+    char status_buffer[12]; 
+    
+    gdispClear(White);
+    gdispDrawString(0, 0, title, state->font_fixed5x8, Black);
+    gdispDrawString(0, 10, mods_header, state->font_fixed5x8, Black);
+    format_mods_bitmap_string(state->status.mods, status_buffer);
+    gdispDrawString(0, 20, status_buffer, state->font_fixed5x8, Black);
+
+    gdispFlush();
+    return false;
+}
 #endif // LCD_ENABLE
 
 bool keyframe_disable_lcd_and_backlight(keyframe_animation_t* animation, visualizer_state_t* state) {
@@ -350,6 +393,7 @@ static DECLARE_THREAD_FUNCTION(visualizerThread, arg) {
     visualizer_keyboard_status_t initial_status = {
         .default_layer = 0xFFFFFFFF,
         .layer = 0xFFFFFFFF,
+        .mods = 0xFF,
         .leds = 0xFFFFFFFF,
         .suspended = false,
     };
@@ -499,7 +543,18 @@ void update_status(bool changed) {
 #endif
 }
 
-void visualizer_update(uint32_t default_state, uint32_t state, uint32_t leds) {
+uint8_t visualizer_get_mods() {
+  uint8_t mods = get_mods();
+
+#ifndef NO_ACTION_ONESHOT
+  if (!has_oneshot_mods_timed_out()) {
+    mods |= get_oneshot_mods();
+  }
+#endif  
+  return mods;
+}
+
+void visualizer_update(uint32_t default_state, uint32_t state, uint8_t mods, uint32_t leds) {
     // Note that there's a small race condition here, the thread could read
     // a state where one of these are set but not the other. But this should
     // not really matter as it will be fixed during the next loop step.
@@ -523,6 +578,7 @@ void visualizer_update(uint32_t default_state, uint32_t state, uint32_t leds) {
         visualizer_keyboard_status_t new_status = {
             .layer = state,
             .default_layer = default_state,
+            .mods = mods,
             .leds = leds,
             .suspended = current_status.suspended,
         };
diff --git a/quantum/visualizer/visualizer.h b/quantum/visualizer/visualizer.h
index 53e250725c..315af50228 100644
--- a/quantum/visualizer/visualizer.h
+++ b/quantum/visualizer/visualizer.h
@@ -34,10 +34,14 @@ SOFTWARE.
 #include "lcd_backlight.h"
 #endif
 
+// use this function to merget both real_mods and oneshot_mods in a uint16_t
+uint8_t visualizer_get_mods(void);
+
 // This need to be called once at the start
 void visualizer_init(void);
 // This should be called at every matrix scan
-void visualizer_update(uint32_t default_state, uint32_t state, uint32_t leds);
+void visualizer_update(uint32_t default_state, uint32_t state, uint8_t mods, uint32_t leds);
+
 // This should be called when the keyboard goes to suspend state
 void visualizer_suspend(void);
 // This should be called when the keyboard wakes up from suspend state
@@ -61,6 +65,7 @@ struct keyframe_animation_t;
 typedef struct {
     uint32_t layer;
     uint32_t default_layer;
+    uint8_t mods;
     uint32_t leds; // See led.h for available statuses
     bool suspended;
 } visualizer_keyboard_status_t;
@@ -129,6 +134,8 @@ bool keyframe_set_backlight_color(keyframe_animation_t* animation, visualizer_st
 bool keyframe_display_layer_text(keyframe_animation_t* animation, visualizer_state_t* state);
 // Displays a bitmap (0/1) of all the currently active layers
 bool keyframe_display_layer_bitmap(keyframe_animation_t* animation, visualizer_state_t* state);
+// Displays a bitmap (0/1) of all the currently active mods
+bool keyframe_display_mods_bitmap(keyframe_animation_t* animation, visualizer_state_t* state);
 
 bool keyframe_disable_lcd_and_backlight(keyframe_animation_t* animation, visualizer_state_t* state);
 bool keyframe_enable_lcd_and_backlight(keyframe_animation_t* animation, visualizer_state_t* state);