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			261 lines
		
	
	
		
			9.1 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			261 lines
		
	
	
		
			9.1 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
// Copyright 2021-2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "process_caps_word.h"
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#ifdef CAPS_WORD_INVERT_ON_SHIFT
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static uint8_t held_mods = 0;
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static bool handle_shift(uint16_t keycode, keyrecord_t* record) {
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    switch (keycode) {
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        case OSM(MOD_LSFT):
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            keycode = KC_LSFT;
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            break;
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        case OSM(MOD_RSFT):
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            keycode = KC_RSFT;
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            break;
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#    ifndef NO_ACTION_TAPPING
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        case QK_MOD_TAP ... QK_MOD_TAP_MAX:
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            if (record->tap.count == 0) { // Mod-tap key is held.
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                switch (QK_MOD_TAP_GET_MODS(keycode)) {
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                    case MOD_LSFT:
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                        keycode = KC_LSFT;
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                        break;
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                    case MOD_RSFT:
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                        keycode = KC_RSFT;
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                        break;
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                }
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            }
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#    endif // NO_ACTION_TAPPING
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    }
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    if (keycode == KC_LSFT || keycode == KC_RSFT) {
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        const uint8_t mod = MOD_BIT(keycode);
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        if (is_caps_word_on()) {
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            if (record->event.pressed) {
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                held_mods |= mod;
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            } else {
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                held_mods &= ~mod;
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            }
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            return false;
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        } else if ((held_mods & mod) != 0) {
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            held_mods &= ~mod;
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            del_mods(mod);
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            return record->event.pressed;
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        }
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    }
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    return true;
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}
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#endif // CAPS_WORD_INVERT_ON_SHIFT
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bool process_caps_word(uint16_t keycode, keyrecord_t* record) {
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    if (keycode == QK_CAPS_WORD_TOGGLE) {
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        if (record->event.pressed) {
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            caps_word_toggle();
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        }
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        return false;
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    }
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#ifdef CAPS_WORD_INVERT_ON_SHIFT
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    if (!handle_shift(keycode, record)) {
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        return false;
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    }
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#endif // CAPS_WORD_INVERT_ON_SHIFT
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#ifndef NO_ACTION_ONESHOT
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    const uint8_t mods = get_mods() | get_oneshot_mods();
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#else
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    const uint8_t mods = get_mods();
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#endif // NO_ACTION_ONESHOT
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    if (!is_caps_word_on()) {
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        // The following optionally turns on Caps Word by holding left and
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        // right shifts or by double tapping left shift. This way Caps Word
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        // may be used without needing a dedicated key and also without
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        // needing combos or tap dance.
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#ifdef BOTH_SHIFTS_TURNS_ON_CAPS_WORD
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        // Many keyboards enable the Command feature by default, which also
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        // uses left+right shift. It can be configured to use a different
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        // key combination by defining IS_COMMAND(). We make a non-fatal
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        // warning if Command is enabled but IS_COMMAND() is *not* defined.
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#    if defined(COMMAND_ENABLE) && !defined(IS_COMMAND)
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#        pragma message "BOTH_SHIFTS_TURNS_ON_CAPS_WORD and Command should not be enabled at the same time, since both use the Left Shift + Right Shift key combination. Please disable Command, or ensure that `IS_COMMAND` is not set to (get_mods() == MOD_MASK_SHIFT)."
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#    else
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        if (mods == MOD_MASK_SHIFT
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#        ifdef COMMAND_ENABLE
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            // Don't activate Caps Word at the same time as Command.
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            && !(IS_COMMAND())
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#        endif // COMMAND_ENABLE
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        ) {
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            caps_word_on();
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        }
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#    endif     // defined(COMMAND_ENABLE) && !defined(IS_COMMAND)
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#endif         // BOTH_SHIFTS_TURNS_ON_CAPS_WORD
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#ifdef DOUBLE_TAP_SHIFT_TURNS_ON_CAPS_WORD
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        // Double tapping left shift turns on Caps Word.
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        //
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        // NOTE: This works with KC_LSFT and one-shot left shift. It
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        // wouldn't make sense with mod-tap or Space Cadet shift since
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        // double tapping would of course trigger the tapping action.
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        if (record->event.pressed) {
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            static bool     tapped = false;
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            static uint16_t timer  = 0;
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            if (keycode == KC_LSFT || keycode == OSM(MOD_LSFT)) {
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                if (tapped && !timer_expired(record->event.time, timer)) {
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                    // Left shift was double tapped, activate Caps Word.
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                    caps_word_on();
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                }
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                tapped = true;
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                timer  = record->event.time + GET_TAPPING_TERM(keycode, record);
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            } else {
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                tapped = false; // Reset when any other key is pressed.
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            }
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        }
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#endif // DOUBLE_TAP_SHIFT_TURNS_ON_CAPS_WORD
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        return true;
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    }
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#if CAPS_WORD_IDLE_TIMEOUT > 0
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    caps_word_reset_idle_timer();
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#endif // CAPS_WORD_IDLE_TIMEOUT > 0
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    // From here on, we only take action on press events.
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    if (!record->event.pressed) {
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        return true;
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    }
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    if (!(mods & ~(MOD_MASK_SHIFT | MOD_BIT(KC_RALT)))) {
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        switch (keycode) {
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            // Ignore MO, TO, TG, TT, and OSL layer switch keys.
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            case QK_MOMENTARY ... QK_MOMENTARY_MAX:
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            case QK_TO ... QK_TO_MAX:
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            case QK_TOGGLE_LAYER ... QK_TOGGLE_LAYER_MAX:
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            case QK_LAYER_TAP_TOGGLE ... QK_LAYER_TAP_TOGGLE_MAX:
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            case QK_ONE_SHOT_LAYER ... QK_ONE_SHOT_LAYER_MAX:
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            case QK_TRI_LAYER_LOWER ... QK_TRI_LAYER_UPPER:
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            // Ignore AltGr.
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            case KC_RALT:
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            case OSM(MOD_RALT):
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                return true;
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#ifndef NO_ACTION_TAPPING
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            // Corresponding to mod keys above, a held mod-tap is handled as:
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            // * For shift mods, pass KC_LSFT or KC_RSFT to
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            //   caps_word_press_user() to determine whether to continue.
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            // * For Shift + AltGr (MOD_RSFT | MOD_RALT), pass RSFT(KC_RALT).
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            // * AltGr (MOD_RALT) is ignored.
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            // * Otherwise stop Caps Word.
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            case QK_MOD_TAP ... QK_MOD_TAP_MAX:
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                if (record->tap.count == 0) { // Mod-tap key is held.
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                    const uint8_t mods = QK_MOD_TAP_GET_MODS(keycode);
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                    switch (mods) {
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#    ifndef CAPS_WORD_INVERT_ON_SHIFT
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                        case MOD_LSFT:
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                            keycode = KC_LSFT;
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                            break;
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                        case MOD_RSFT:
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                            keycode = KC_RSFT;
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                            break;
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#    endif // CAPS_WORD_INVERT_ON_SHIFT
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                        case MOD_RSFT | MOD_RALT:
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                            keycode = RSFT(KC_RALT);
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                            break;
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                        case MOD_RALT:
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                            return true;
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                        default:
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                            caps_word_off();
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#    ifdef CAPS_WORD_INVERT_ON_SHIFT
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                            add_mods(held_mods);
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#    endif // CAPS_WORD_INVERT_ON_SHIFT
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                            return true;
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                    }
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                } else {
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                    keycode = QK_MOD_TAP_GET_TAP_KEYCODE(keycode);
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                }
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                break;
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#    ifndef NO_ACTION_LAYER
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            case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
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#    endif // NO_ACTION_LAYER
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                if (record->tap.count == 0) {
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                    return true;
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                }
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                keycode = QK_LAYER_TAP_GET_TAP_KEYCODE(keycode);
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                break;
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#endif // NO_ACTION_TAPPING
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#ifdef SWAP_HANDS_ENABLE
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            case QK_SWAP_HANDS ... QK_SWAP_HANDS_MAX:
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                // Note: IS_SWAP_HANDS_KEYCODE() actually tests for the special action keycodes like SH_TOGG, SH_TT, ...,
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                // which currently overlap the SH_T(kc) range.
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                if (IS_SWAP_HANDS_KEYCODE(keycode)
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#    ifndef NO_ACTION_TAPPING
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                    || record->tap.count == 0
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#    endif // NO_ACTION_TAPPING
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                ) {
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                    return true;
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                }
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                keycode = QK_SWAP_HANDS_GET_TAP_KEYCODE(keycode);
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                break;
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#endif // SWAP_HANDS_ENABLE
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        }
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#ifdef AUTO_SHIFT_ENABLE
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        del_weak_mods(get_autoshift_state() ? ~MOD_BIT(KC_LSFT) : 0xff);
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#else
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        clear_weak_mods();
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#endif // AUTO_SHIFT_ENABLE
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        if (caps_word_press_user(keycode)) {
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#ifdef CAPS_WORD_INVERT_ON_SHIFT
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            if (held_mods) {
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                set_weak_mods(get_weak_mods() ^ MOD_BIT(KC_LSFT));
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            }
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#endif // CAPS_WORD_INVERT_ON_SHIFT
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            send_keyboard_report();
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            return true;
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        }
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    }
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    caps_word_off();
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#ifdef CAPS_WORD_INVERT_ON_SHIFT
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    add_mods(held_mods);
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#endif // CAPS_WORD_INVERT_ON_SHIFT
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    return true;
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}
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__attribute__((weak)) bool caps_word_press_user(uint16_t keycode) {
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    switch (keycode) {
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        // Keycodes that continue Caps Word, with shift applied.
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        case KC_A ... KC_Z:
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        case KC_MINS:
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            add_weak_mods(MOD_BIT(KC_LSFT)); // Apply shift to next key.
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            return true;
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        // Keycodes that continue Caps Word, without shifting.
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        case KC_1 ... KC_0:
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        case KC_BSPC:
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        case KC_DEL:
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        case KC_UNDS:
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            return true;
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        default:
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            return false; // Deactivate Caps Word.
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    }
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}
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