255 lines
8.0 KiB
C
255 lines
8.0 KiB
C
/* Copyright 2017 Jeremy Cowgar
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef AUTO_SHIFT_ENABLE
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# include <stdbool.h>
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# include <stdio.h>
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# include "process_auto_shift.h"
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#ifndef AUTO_SHIFT_DISABLED_AT_STARTUP
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# define AUTO_SHIFT_STARTUP_STATE true /* enabled */
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#else
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# define AUTO_SHIFT_STARTUP_STATE false /* disabled */
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#endif
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static uint16_t autoshift_time = 0;
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static uint16_t autoshift_timeout = AUTO_SHIFT_TIMEOUT;
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static uint16_t autoshift_lastkey = KC_NO;
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static struct {
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// Whether autoshift is enabled.
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bool enabled : 1;
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// Whether the last auto-shifted key was released after the timeout. This
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// is used to replicate the last key for a tap-then-hold.
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bool lastshifted : 1;
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// Whether an auto-shiftable key has been pressed but not processed.
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bool in_progress : 1;
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// Whether the auto-shifted keypress has been registered.
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bool holding_shift : 1;
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} autoshift_flags = {AUTO_SHIFT_STARTUP_STATE, false, false, false};
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/** \brief Record the press of an autoshiftable key
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*
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* \return Whether the record should be further processed.
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*/
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static bool autoshift_press(uint16_t keycode, uint16_t now, keyrecord_t *record) {
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if (!autoshift_flags.enabled) {
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return true;
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}
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# ifndef AUTO_SHIFT_MODIFIERS
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if (get_mods()) {
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return true;
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}
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# endif
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# ifdef AUTO_SHIFT_REPEAT
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const uint16_t elapsed = TIMER_DIFF_16(now, autoshift_time);
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# ifndef AUTO_SHIFT_NO_AUTO_REPEAT
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if (!autoshift_flags.lastshifted) {
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# endif
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if (elapsed < TAPPING_TERM && keycode == autoshift_lastkey) {
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// Allow a tap-then-hold for keyrepeat.
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if (!autoshift_flags.lastshifted) {
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register_code(autoshift_lastkey);
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} else {
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// Simulate pressing the shift key.
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add_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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register_code(autoshift_lastkey);
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}
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return false;
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}
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# ifndef AUTO_SHIFT_NO_AUTO_REPEAT
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}
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# endif
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# endif
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// Record the keycode so we can simulate it later.
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autoshift_lastkey = keycode;
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autoshift_time = now;
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autoshift_flags.in_progress = true;
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# if !defined(NO_ACTION_ONESHOT) && !defined(NO_ACTION_TAPPING)
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clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
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# endif
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return false;
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}
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/** \brief Registers an autoshiftable key under the right conditions
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*
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* If the autoshift delay has elapsed, register a shift and the key.
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*
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* If the autoshift key is released before the delay has elapsed, register the
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* key without a shift.
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*/
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static void autoshift_end(uint16_t keycode, uint16_t now, bool matrix_trigger) {
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// Called on key down with KC_NO, auto-shifted key up, and timeout.
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if (autoshift_flags.in_progress) {
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// Process the auto-shiftable key.
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autoshift_flags.in_progress = false;
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// Time since the initial press was recorded.
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const uint16_t elapsed = TIMER_DIFF_16(now, autoshift_time);
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if (elapsed < autoshift_timeout) {
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register_code(autoshift_lastkey);
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autoshift_flags.lastshifted = false;
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} else {
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// Simulate pressing the shift key.
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add_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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register_code(autoshift_lastkey);
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autoshift_flags.lastshifted = true;
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# if defined(AUTO_SHIFT_REPEAT) && !defined(AUTO_SHIFT_NO_AUTO_REPEAT)
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if (matrix_trigger) {
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// Prevents release.
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return;
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}
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# endif
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}
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# if TAP_CODE_DELAY > 0
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wait_ms(TAP_CODE_DELAY);
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# endif
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unregister_code(autoshift_lastkey);
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del_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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} else {
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// Release after keyrepeat.
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unregister_code(keycode);
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if (keycode == autoshift_lastkey) {
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// This will only fire when the key was the last auto-shiftable
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// pressed. That prevents aaaaBBBB then releasing a from unshifting
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// later Bs (if B wasn't auto-shiftable).
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del_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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}
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}
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send_keyboard_report(); // del_weak_mods doesn't send one.
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// Roll the autoshift_time forward for detecting tap-and-hold.
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autoshift_time = now;
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}
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/** \brief Simulates auto-shifted key releases when timeout is hit
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*
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* Can be called from \c matrix_scan_user so that auto-shifted keys are sent
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* immediately after the timeout has expired, rather than waiting for the key
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* to be released.
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*/
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void autoshift_matrix_scan(void) {
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if (autoshift_flags.in_progress) {
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const uint16_t now = timer_read();
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const uint16_t elapsed = TIMER_DIFF_16(now, autoshift_time);
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if (elapsed >= autoshift_timeout) {
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autoshift_end(autoshift_lastkey, now, true);
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}
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}
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}
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void autoshift_toggle(void) {
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autoshift_flags.enabled = !autoshift_flags.enabled;
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del_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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}
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void autoshift_enable(void) { autoshift_flags.enabled = true; }
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void autoshift_disable(void) {
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autoshift_flags.enabled = false;
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del_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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}
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# ifndef AUTO_SHIFT_NO_SETUP
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void autoshift_timer_report(void) {
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char display[8];
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snprintf(display, 8, "\n%d\n", autoshift_timeout);
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send_string((const char *)display);
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}
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# endif
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bool get_autoshift_state(void) { return autoshift_flags.enabled; }
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uint16_t get_autoshift_timeout(void) { return autoshift_timeout; }
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void set_autoshift_timeout(uint16_t timeout) { autoshift_timeout = timeout; }
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bool process_auto_shift(uint16_t keycode, keyrecord_t *record) {
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// Note that record->event.time isn't reliable, see:
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// https://github.com/qmk/qmk_firmware/pull/9826#issuecomment-733559550
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const uint16_t now = timer_read();
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if (record->event.pressed) {
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if (autoshift_flags.in_progress) {
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// Evaluate previous key if there is one. Doing this elsewhere is
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// more complicated and easier to break.
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autoshift_end(KC_NO, now, false);
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}
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// For pressing another key while keyrepeating shifted autoshift.
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del_weak_mods(MOD_BIT(KC_LEFT_SHIFT));
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switch (keycode) {
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case KC_ASTG:
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autoshift_toggle();
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return true;
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case KC_ASON:
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autoshift_enable();
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return true;
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case KC_ASOFF:
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autoshift_disable();
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return true;
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# ifndef AUTO_SHIFT_NO_SETUP
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case KC_ASUP:
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autoshift_timeout += 5;
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return true;
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case KC_ASDN:
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autoshift_timeout -= 5;
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return true;
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case KC_ASRP:
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autoshift_timer_report();
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return true;
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# endif
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}
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}
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if (get_auto_shifted_key(keycode, record)) {
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if (record->event.pressed) {
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return autoshift_press(keycode, now, record);
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} else {
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autoshift_end(keycode, now, false);
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return false;
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}
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}
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return true;
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}
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__attribute__((weak)) bool get_auto_shifted_key(uint16_t keycode, keyrecord_t *record) {
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switch (keycode) {
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# ifndef NO_AUTO_SHIFT_ALPHA
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case KC_A ... KC_Z:
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# endif
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# ifndef NO_AUTO_SHIFT_NUMERIC
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case KC_1 ... KC_0:
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# endif
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# ifndef NO_AUTO_SHIFT_SPECIAL
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case KC_TAB:
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case KC_MINUS ... KC_SLASH:
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case KC_NONUS_BACKSLASH:
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# endif
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return true;
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}
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return false;
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}
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#endif
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