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qmk_firmware/keyboards/bastardkb/charybdis/charybdis.c

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/*
* Copyright 2020 Christopher Courtney <drashna@live.com> (@drashna)
* Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
* Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Publicw 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/>.
*/
#include "charybdis.h"
#ifdef CONSOLE_ENABLE
# include "print.h"
#endif // CONSOLE_ENABLE
#ifdef POINTING_DEVICE_ENABLE
# ifndef CHARYBDIS_MINIMUM_DEFAULT_DPI
# define CHARYBDIS_MINIMUM_DEFAULT_DPI 400
# endif // CHARYBDIS_MINIMUM_DEFAULT_DPI
# ifndef CHARYBDIS_DEFAULT_DPI_CONFIG_STEP
# define CHARYBDIS_DEFAULT_DPI_CONFIG_STEP 200
# endif // CHARYBDIS_DEFAULT_DPI_CONFIG_STEP
# ifndef CHARYBDIS_MINIMUM_SNIPING_DPI
# define CHARYBDIS_MINIMUM_SNIPING_DPI 200
# endif // CHARYBDIS_MINIMUM_SNIPER_MODE_DPI
# ifndef CHARYBDIS_SNIPING_DPI_CONFIG_STEP
# define CHARYBDIS_SNIPING_DPI_CONFIG_STEP 100
# endif // CHARYBDIS_SNIPING_DPI_CONFIG_STEP
// Fixed DPI for drag-scroll.
# ifndef CHARYBDIS_DRAGSCROLL_DPI
# define CHARYBDIS_DRAGSCROLL_DPI 100
# endif // CHARYBDIS_DRAGSCROLL_DPI
# ifndef CHARYBDIS_DRAGSCROLL_BUFFER_SIZE
# define CHARYBDIS_DRAGSCROLL_BUFFER_SIZE 6
# endif // !CHARYBDIS_DRAGSCROLL_BUFFER_SIZE
# ifndef CHARYBDIS_POINTER_ACCELERATION_FACTOR
# define CHARYBDIS_POINTER_ACCELERATION_FACTOR 24
# endif // !CHARYBDIS_POINTER_ACCELERATION_FACTOR
typedef union {
uint8_t raw;
struct {
uint8_t pointer_default_dpi : 4; // 16 steps available.
uint8_t pointer_sniping_dpi : 2; // 4 steps available.
bool is_dragscroll_enabled : 1;
bool is_sniping_enabled : 1;
} __attribute__((packed));
} charybdis_config_t;
static charybdis_config_t g_charybdis_config = {0};
/**
* \brief Set the value of `config` from EEPROM.
*
* Note that `is_dragscroll_enabled` and `is_sniping_enabled` are purposefully
* ignored since we do not want to persist this state to memory. In practice,
* this state is always written to maximize write-performances. Therefore, we
* explicitly set them to `false` in this function.
*/
static void read_charybdis_config_from_eeprom(charybdis_config_t* config) {
config->raw = eeconfig_read_kb() & 0xff;
config->is_dragscroll_enabled = false;
config->is_sniping_enabled = false;
}
/**
* \brief Save the value of `config` to eeprom.
*
* Note that all values are written verbatim, including whether drag-scroll
* and/or sniper mode are enabled. `read_charybdis_config_from_eeprom(…)`
* resets these 2 values to `false` since it does not make sense to persist
* these across reboots of the board.
*/
static void write_charybdis_config_to_eeprom(charybdis_config_t* config) { eeconfig_update_kb(config->raw); }
/** \brief Return the current value of the pointer's default DPI. */
static uint16_t get_pointer_default_dpi(charybdis_config_t* config) { return (uint16_t)config->pointer_default_dpi * CHARYBDIS_DEFAULT_DPI_CONFIG_STEP + CHARYBDIS_MINIMUM_DEFAULT_DPI; }
/** \brief Return the current value of the pointer's sniper-mode DPI. */
static uint16_t get_pointer_sniping_dpi(charybdis_config_t* config) { return (uint16_t)config->pointer_sniping_dpi * CHARYBDIS_SNIPING_DPI_CONFIG_STEP + CHARYBDIS_MINIMUM_SNIPING_DPI; }
/** \brief Set the appropriate DPI for the input config. */
static void maybe_update_pointing_device_cpi(charybdis_config_t* config) {
if (config->is_dragscroll_enabled) {
pointing_device_set_cpi(CHARYBDIS_DRAGSCROLL_DPI);
} else if (config->is_sniping_enabled) {
pointing_device_set_cpi(get_pointer_sniping_dpi(config));
} else {
pointing_device_set_cpi(get_pointer_default_dpi(config));
}
}
/**
* \brief Update the pointer's default DPI to the next or previous step.
*
* Increases the DPI value if `forward` is `true`, decreases it otherwise.
* The increment/decrement steps are equal to CHARYBDIS_DEFAULT_DPI_CONFIG_STEP.
*/
static void step_pointer_default_dpi(charybdis_config_t* config, bool forward) {
config->pointer_default_dpi += forward ? 1 : -1;
maybe_update_pointing_device_cpi(config);
}
/**
* \brief Update the pointer's sniper-mode DPI to the next or previous step.
*
* Increases the DPI value if `forward` is `true`, decreases it otherwise.
* The increment/decrement steps are equal to CHARYBDIS_SNIPING_DPI_CONFIG_STEP.
*/
static void step_pointer_sniping_dpi(charybdis_config_t* config, bool forward) {
config->pointer_sniping_dpi += forward ? 1 : -1;
maybe_update_pointing_device_cpi(config);
}
uint16_t charybdis_get_pointer_default_dpi(void) { return get_pointer_default_dpi(&g_charybdis_config); }
uint16_t charybdis_get_pointer_sniping_dpi(void) { return get_pointer_sniping_dpi(&g_charybdis_config); }
void charybdis_cycle_pointer_default_dpi_noeeprom(bool forward) { step_pointer_default_dpi(&g_charybdis_config, forward); }
void charybdis_cycle_pointer_default_dpi(bool forward) {
step_pointer_default_dpi(&g_charybdis_config, forward);
write_charybdis_config_to_eeprom(&g_charybdis_config);
}
void charybdis_cycle_pointer_sniping_dpi_noeeprom(bool forward) { step_pointer_sniping_dpi(&g_charybdis_config, forward); }
void charybdis_cycle_pointer_sniping_dpi(bool forward) {
step_pointer_sniping_dpi(&g_charybdis_config, forward);
write_charybdis_config_to_eeprom(&g_charybdis_config);
}
bool charybdis_get_pointer_sniping_enabled(void) { return g_charybdis_config.is_sniping_enabled; }
void charybdis_set_pointer_sniping_enabled(bool enable) {
g_charybdis_config.is_sniping_enabled = enable;
maybe_update_pointing_device_cpi(&g_charybdis_config);
}
bool charybdis_get_pointer_dragscroll_enabled(void) { return g_charybdis_config.is_dragscroll_enabled; }
void charybdis_set_pointer_dragscroll_enabled(bool enable) {
g_charybdis_config.is_dragscroll_enabled = enable;
maybe_update_pointing_device_cpi(&g_charybdis_config);
}
void pointing_device_init_kb(void) { maybe_update_pointing_device_cpi(&g_charybdis_config); }
# ifndef CONSTRAIN_HID
# define CONSTRAIN_HID(value) ((value) < -127 ? -127 : ((value) > 127 ? 127 : (value)))
# endif // !CONSTRAIN_HID
/**
* \brief Add optional acceleration effect.
*
* If `CHARYBDIS_ENABLE_POINTER_ACCELERATION` is defined, add a simple and naive
* acceleration effect to the provided value. Return the value unchanged
* otherwise.
*/
# ifndef DISPLACEMENT_WITH_ACCELERATION
# ifdef CHARYBDIS_POINTER_ACCELERATION_ENABLE
# define DISPLACEMENT_WITH_ACCELERATION(d) (CONSTRAIN_HID(d > 0 ? d * d / CHARYBDIS_POINTER_ACCELERATION_FACTOR + d : -d * d / CHARYBDIS_POINTER_ACCELERATION_FACTOR + d))
# else // !CHARYBDIS_POINTER_ACCELERATION_ENABLE
# define DISPLACEMENT_WITH_ACCELERATION(d) (d)
# endif // CHARYBDIS_POINTER_ACCELERATION_ENABLE
# endif // !DISPLACEMENT_WITH_ACCELERATION
/**
* \brief Augment the pointing device behavior.
*
* Implement the Charybdis-specific features for pointing devices:
* - Drag-scroll
* - Sniping
* - Acceleration
*/
static void pointing_device_task_charybdis(report_mouse_t* mouse_report) {
static int16_t scroll_buffer_x = 0;
static int16_t scroll_buffer_y = 0;
if (g_charybdis_config.is_dragscroll_enabled) {
# ifdef CHARYBDIS_DRAGSCROLL_REVERSE_X
scroll_buffer_x -= mouse_report->x;
# else
scroll_buffer_x += mouse_report->x;
# endif // CHARYBDIS_DRAGSCROLL_REVERSE_X
# ifdef CHARYBDIS_DRAGSCROLL_REVERSE_Y
scroll_buffer_y -= mouse_report->y;
# else
scroll_buffer_y += mouse_report->y;
# endif // CHARYBDIS_DRAGSCROLL_REVERSE_Y
mouse_report->x = 0;
mouse_report->y = 0;
if (abs(scroll_buffer_x) > CHARYBDIS_DRAGSCROLL_BUFFER_SIZE) {
mouse_report->h = scroll_buffer_x > 0 ? 1 : -1;
scroll_buffer_x = 0;
}
if (abs(scroll_buffer_y) > CHARYBDIS_DRAGSCROLL_BUFFER_SIZE) {
mouse_report->v = scroll_buffer_y > 0 ? 1 : -1;
scroll_buffer_y = 0;
}
} else if (!g_charybdis_config.is_sniping_enabled) {
mouse_report->x = DISPLACEMENT_WITH_ACCELERATION(mouse_report->x);
mouse_report->y = DISPLACEMENT_WITH_ACCELERATION(mouse_report->y);
}
}
report_mouse_t pointing_device_task_kb(report_mouse_t mouse_report) {
if (is_keyboard_master()) {
pointing_device_task_charybdis(&mouse_report);
mouse_report = pointing_device_task_user(mouse_report);
}
return mouse_report;
}
# if defined(POINTING_DEVICE_ENABLE) && !defined(NO_CHARYBDIS_KEYCODES)
/** \brief Whether SHIFT mod is enabled. */
static bool has_shift_mod(void) {
# ifdef NO_ACTION_ONESHOT
return mod_config(get_mods()) & MOD_MASK_SHIFT;
# else
return mod_config(get_mods() | get_oneshot_mods()) & MOD_MASK_SHIFT;
# endif // NO_ACTION_ONESHOT
}
# endif // POINTING_DEVICE_ENABLE && !NO_CHARYBDIS_KEYCODES
/**
* \brief Outputs the Charybdis configuration to console.
*
* Prints the in-memory configuration structure to console, for debugging.
* Includes:
* - raw value
* - drag-scroll: on/off
* - sniping: on/off
* - default DPI: internal table index/actual DPI
* - sniping DPI: internal table index/actual DPI
*/
static void debug_charybdis_config_to_console(charybdis_config_t* config) {
# ifdef CONSOLE_ENABLE
dprintf("(charybdis) process_record_kb: config = {\n"
"\traw = 0x%04X,\n"
"\t{\n"
"\t\tis_dragscroll_enabled=%b\n"
"\t\tis_sniping_enabled=%b\n"
"\t\tdefault_dpi=0x%02X (%ld)\n"
"\t\tsniping_dpi=0x%01X (%ld)\n"
"\t}\n"
"}\n",
config->raw, config->is_dragscroll_enabled, config->is_sniping_enabled, config->pointer_default_dpi, get_pointer_default_dpi(config), config->pointer_sniping_dpi, get_pointer_sniping_dpi(config));
# endif // CONSOLE_ENABLE
}
bool process_record_kb(uint16_t keycode, keyrecord_t* record) {
if (!process_record_user(keycode, record)) {
debug_charybdis_config_to_console(&g_charybdis_config);
return false;
}
# ifdef POINTING_DEVICE_ENABLE
# ifndef NO_CHARYBDIS_KEYCODES
switch (keycode) {
case POINTER_DEFAULT_DPI_FORWARD:
if (record->event.pressed) {
// Step backward if shifted, forward otherwise.
charybdis_cycle_pointer_default_dpi(/* forward= */ !has_shift_mod());
}
break;
case POINTER_DEFAULT_DPI_REVERSE:
if (record->event.pressed) {
// Step forward if shifted, backward otherwise.
charybdis_cycle_pointer_default_dpi(/* forward= */ has_shift_mod());
}
break;
case POINTER_SNIPING_DPI_FORWARD:
if (record->event.pressed) {
// Step backward if shifted, forward otherwise.
charybdis_cycle_pointer_sniping_dpi(/* forward= */ !has_shift_mod());
}
break;
case POINTER_SNIPING_DPI_REVERSE:
if (record->event.pressed) {
// Step forward if shifted, backward otherwise.
charybdis_cycle_pointer_sniping_dpi(/* forward= */ has_shift_mod());
}
break;
case SNIPING_MODE:
charybdis_set_pointer_sniping_enabled(record->event.pressed);
break;
case SNIPING_MODE_TOGGLE:
if (record->event.pressed) {
charybdis_set_pointer_sniping_enabled(!charybdis_get_pointer_sniping_enabled());
}
break;
case DRAGSCROLL_MODE:
charybdis_set_pointer_dragscroll_enabled(record->event.pressed);
break;
case DRAGSCROLL_MODE_TOGGLE:
if (record->event.pressed) {
charybdis_set_pointer_dragscroll_enabled(!charybdis_get_pointer_dragscroll_enabled());
}
break;
}
# endif // !NO_CHARYBDIS_KEYCODES
# ifndef MOUSEKEY_ENABLE
// Simulate mouse keys if full support is not enabled (reduces firmware size
// while maintaining support for mouse keys).
if (IS_MOUSEKEY_BUTTON(keycode)) {
report_mouse_t mouse_report = pointing_device_get_report();
mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, record->event.pressed, keycode - KC_MS_BTN1);
pointing_device_set_report(mouse_report);
pointing_device_send();
}
# endif // !MOUSEKEY_ENABLE
# endif // POINTING_DEVICE_ENABLE
debug_charybdis_config_to_console(&g_charybdis_config);
return true;
}
void eeconfig_init_kb(void) {
g_charybdis_config.raw = 0;
write_charybdis_config_to_eeprom(&g_charybdis_config);
maybe_update_pointing_device_cpi(&g_charybdis_config);
eeconfig_init_user();
}
void matrix_init_kb(void) {
read_charybdis_config_from_eeprom(&g_charybdis_config);
matrix_init_user();
}
#endif // POINTING_DEVICE_ENABLE
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