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/*
Copyright 2011 Jun Wako <wakojun@gmail.com>
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/>.
*/
#include "keymap.h"
#include "host.h"
#include "debug.h"
#include "timer.h"
#include "usb_keycodes.h"
#include "layer.h"
/*
* Parameters:
* ENTER_DELAY |=======|
* SEND_FN_TERM |================|
*
* Fn key processing cases:
* 1. release Fn after SEND_FN_TERM.
* Layer sw ___________|~~~~~~~~~~~|___
* Fn press ___|~~~~~~~~~~~~~~~~~~~|___
* Fn send ___________________________
*
* 2. release Fn during SEND_FN_TERM.(not layer used)
* Layer sw ___________|~~~~~~|________
* Fn press ___|~~~~~~~~~~~~~~|________
* Fn key send __________________|~|______
* other key press ___________________________
* other key send ___________________________
*
* 3. release Fn during SEND_FN_TERM.(layer used)
* Layer sw ___________|~~~~~~|________
* Fn press ___|~~~~~~~~~~~~~~|________
* Fn key send ___________________________
* Fn send ___________________________
* other key press _____________|~~|__________
* other key send _____________|~~|__________
*
* 4. press other key during ENTER_DELAY.
* Layer sw ___________________________
* Fn key press ___|~~~~~~~~~|_____________
* Fn key send ______|~~~~~~|_____________
* other key press ______|~~~|________________
* other key send _______|~~|________________
*
* 5. press Fn while press other key.
* Layer sw ___________________________
* Fn key press ___|~~~~~~~~~|_____________
* Fn key send ___|~~~~~~~~~|_____________
* other key press ~~~~~~~|___________________
* other key send ~~~~~~~|___________________
*
* 6. press Fn twice quickly and keep holding down.(repeat)
* Layer sw ___________________________
* Fn key press ___|~|____|~~~~~~~~~~~~~~~~
* Fn key send _____|~|__|~~~~~~~~~~~~~~~~
*/
// LAYER_ENTER_DELAY: prevent from moving new layer
#define LAYER_ENTER_DELAY 150
// LAYER_SEND_FN_TERM: send keycode if release key in this term
#define LAYER_SEND_FN_TERM 500
uint8_t default_layer = 0;
uint8_t current_layer = 0;
static bool layer_used = false;
static uint8_t new_layer(uint8_t fn_bits);
uint8_t layer_get_keycode(uint8_t row, uint8_t col)
{
uint8_t code = keymap_get_keycode(current_layer, row, col);
// normal key or mouse key
if ((IS_KEY(code) || IS_MOUSEKEY(code))) {
layer_used = true;
}
return code;
}
// bit substract b from a
#define BIT_SUBST(a, b) (a&(a^b))
void layer_switching(uint8_t fn_bits)
{
// layer switching
static uint8_t last_fn = 0;
static uint8_t last_mods = 0;
static uint16_t last_timer = 0;
static uint8_t sent_fn = 0;
if (fn_bits == last_fn) { // Fn state is not changed
if (fn_bits == 0) {
// do nothing
} else {
if (timer_elapsed(last_timer) > LAYER_ENTER_DELAY) {
uint8_t _layer_to_switch = new_layer(BIT_SUBST(fn_bits, sent_fn));
if (current_layer != _layer_to_switch) { // not switch layer yet
debug("Fn case: 1,2,3(LAYER_ENTER_DELAY passed)\n");
debug("Switch Layer: "); debug_hex(current_layer);
current_layer = _layer_to_switch;
layer_used = false;
debug(" -> "); debug_hex(current_layer); debug("\n");
}
} else {
if (host_has_anykey()) { // other keys is pressed
uint8_t _fn_to_send = BIT_SUBST(fn_bits, sent_fn);
if (_fn_to_send) {
debug("Fn case: 4(send Fn before other key pressed)\n");
// send only Fn key first
host_swap_keyboard_report();
host_clear_keyboard_report();
host_set_mods(last_mods);
host_add_code(keymap_fn_keycode(_fn_to_send)); // TODO: do all Fn keys
host_send_keyboard_report();
host_swap_keyboard_report();
sent_fn |= _fn_to_send;
}
}
}
// add Fn keys to send
//host_add_code(keymap_fn_keycode(fn_bits&sent_fn)); // TODO: do all Fn keys
}
} else { // Fn state is changed(edge)
uint8_t fn_changed = 0;
debug("fn_bits: "); debug_bin(fn_bits); debug("\n");
debug("sent_fn: "); debug_bin(sent_fn); debug("\n");
debug("last_fn: "); debug_bin(last_fn); debug("\n");
debug("last_mods: "); debug_hex(last_mods); debug("\n");
debug("last_timer: "); debug_hex16(last_timer); debug("\n");
// pressed Fn
if ((fn_changed = BIT_SUBST(fn_bits, last_fn))) {
debug("fn_changed: "); debug_bin(fn_changed); debug("\n");
if (host_has_anykey()) {
debug("Fn case: 5(pressed Fn with other key)\n");
sent_fn |= fn_changed;
} else if (fn_changed & sent_fn) { // pressed same Fn in a row
if (timer_elapsed(last_timer) > LAYER_ENTER_DELAY) {
debug("Fn case: 6(not repeat)\n");
// time passed: not repeate
sent_fn &= ~fn_changed;
} else {
debug("Fn case: 6(repeat)\n");
}
}
}
// released Fn
if ((fn_changed = BIT_SUBST(last_fn, fn_bits))) {
debug("fn_changed: "); debug_bin(fn_changed); debug("\n");
if (timer_elapsed(last_timer) < LAYER_SEND_FN_TERM) {
if (!layer_used && BIT_SUBST(fn_changed, sent_fn)) {
debug("Fn case: 2(send Fn one shot: released Fn during LAYER_SEND_FN_TERM)\n");
// send only Fn key first
host_swap_keyboard_report();
host_clear_keyboard_report();
host_set_mods(last_mods);
host_add_code(keymap_fn_keycode(fn_changed)); // TODO: do all Fn keys
host_send_keyboard_report();
host_swap_keyboard_report();
sent_fn |= fn_changed;
}
}
debug("Switch Layer(released Fn): "); debug_hex(current_layer);
current_layer = new_layer(BIT_SUBST(fn_bits, sent_fn));
debug(" -> "); debug_hex(current_layer); debug("\n");
}
layer_used = false;
last_fn = fn_bits;
last_mods = keyboard_report->mods;
last_timer = timer_read();
}
// send Fn keys
for (uint8_t i = 0; i < 8; i++) {
if ((sent_fn & fn_bits) & (1<<i)) {
host_add_code(keymap_fn_keycode(1<<i));
}
}
}
inline
static uint8_t new_layer(uint8_t fn_bits)
{
return (fn_bits ? keymap_fn_layer(fn_bits) : default_layer);
}
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