2b097d670a
* Fix overflow in WPM calculations. First, the "fresh" WPM calculation could end up being up to 12000 (with default `WPM_ESTIMATED_WORD_SIZE`) if keys were pressed more or less simultaneously. This value has now been clamped down to 255, in effect clamping WPM to its max value of 255. Second, with `WPM_ALLOW_COUNT_REGRESSION` enabled, it was possible to regress the WPM below 0 (i.e. to 255) by just repeatedly pressing backspace. * Fix WPM being limited to 235 due to float/int logic.
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/*
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* Copyright 2020 Richard Sutherland (rich@brickbots.com)
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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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#include "wpm.h"
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#include <math.h>
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// WPM Stuff
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static uint8_t current_wpm = 0;
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static uint16_t wpm_timer = 0;
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// This smoothing is 40 keystrokes
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static const float wpm_smoothing = WPM_SMOOTHING;
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void set_current_wpm(uint8_t new_wpm) { current_wpm = new_wpm; }
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uint8_t get_current_wpm(void) { return current_wpm; }
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bool wpm_keycode(uint16_t keycode) { return wpm_keycode_kb(keycode); }
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__attribute__((weak)) bool wpm_keycode_kb(uint16_t keycode) { return wpm_keycode_user(keycode); }
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__attribute__((weak)) bool wpm_keycode_user(uint16_t keycode) {
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if ((keycode >= QK_MOD_TAP && keycode <= QK_MOD_TAP_MAX) || (keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX) || (keycode >= QK_MODS && keycode <= QK_MODS_MAX)) {
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keycode = keycode & 0xFF;
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} else if (keycode > 0xFF) {
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keycode = 0;
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}
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if ((keycode >= KC_A && keycode <= KC_0) || (keycode >= KC_TAB && keycode <= KC_SLASH)) {
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return true;
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}
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return false;
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}
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#ifdef WPM_ALLOW_COUNT_REGRESSION
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__attribute__((weak)) uint8_t wpm_regress_count(uint16_t keycode) {
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bool weak_modded = (keycode >= QK_LCTL && keycode < QK_LSFT) || (keycode >= QK_RCTL && keycode < QK_RSFT);
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if ((keycode >= QK_MOD_TAP && keycode <= QK_MOD_TAP_MAX) || (keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX) || (keycode >= QK_MODS && keycode <= QK_MODS_MAX)) {
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keycode = keycode & 0xFF;
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} else if (keycode > 0xFF) {
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keycode = 0;
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}
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if (keycode == KC_DEL || keycode == KC_BSPC) {
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if (((get_mods() | get_oneshot_mods()) & MOD_MASK_CTRL) || weak_modded) {
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return WPM_ESTIMATED_WORD_SIZE;
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} else {
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return 1;
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}
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} else {
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return 0;
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}
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}
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#endif
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void update_wpm(uint16_t keycode) {
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if (wpm_keycode(keycode)) {
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if (wpm_timer > 0) {
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uint16_t latest_wpm = 60000 / timer_elapsed(wpm_timer) / WPM_ESTIMATED_WORD_SIZE;
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if (latest_wpm > UINT8_MAX) {
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latest_wpm = UINT8_MAX;
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}
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current_wpm += ceilf((latest_wpm - current_wpm) * wpm_smoothing);
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}
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wpm_timer = timer_read();
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}
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#ifdef WPM_ALLOW_COUNT_REGRESSION
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uint8_t regress = wpm_regress_count(keycode);
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if (regress) {
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if (current_wpm < regress) {
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current_wpm = 0;
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} else {
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current_wpm -= regress;
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}
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wpm_timer = timer_read();
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}
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#endif
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}
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void decay_wpm(void) {
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if (timer_elapsed(wpm_timer) > 1000) {
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current_wpm += (-current_wpm) * wpm_smoothing;
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wpm_timer = timer_read();
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}
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}
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