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205 lines
6.2 KiB
205 lines
6.2 KiB
/*******************
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* lock_screen.cpp *
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*******************/
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/****************************************************************************
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* Written By Mark Pelletier 2017 - Aleph Objects, Inc. *
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* Written By Marcio Teixeira 2018 - Aleph Objects, Inc. *
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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 3 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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* To view a copy of the GNU General Public License, go to the following *
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* location: <https://www.gnu.org/licenses/>. *
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****************************************************************************/
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#include "../config.h"
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#include "../screens.h"
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#include "../screen_data.h"
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#ifdef FTDI_LOCK_SCREEN
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using namespace FTDI;
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using namespace Theme;
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uint16_t LockScreen::passcode = 0;
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constexpr static LockScreenData &mydata = screen_data.LockScreen;
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void LockScreen::onEntry() {
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const uint8_t siz = sizeof(mydata.passcode);
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memset(mydata.passcode, '_', siz-1);
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mydata.passcode[siz-1] = '\0';
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BaseScreen::onEntry();
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}
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void LockScreen::onRedraw(draw_mode_t what) {
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CommandProcessor cmd;
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if (what & BACKGROUND) {
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cmd.cmd(CLEAR_COLOR_RGB(bg_color))
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.cmd(CLEAR(true,true,true))
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.cmd(COLOR_RGB(bg_text_enabled))
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.tag(0);
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}
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if (what & FOREGROUND) {
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#if ENABLED(TOUCH_UI_PORTRAIT)
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#define GRID_COLS 1
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#define GRID_ROWS 10
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#else
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#define GRID_COLS 1
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#define GRID_ROWS 7
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#endif
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#undef MARGIN_T
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#undef MARGIN_B
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#define MARGIN_T 3
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#define MARGIN_B 3
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FSTR_P message;
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switch (message_style()) {
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case 'w':
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message = GET_TEXT_F(MSG_PASSCODE_REJECTED);
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break;
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case 'g':
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message = GET_TEXT_F(MSG_PASSCODE_ACCEPTED);
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break;
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default:
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message = passcode ? GET_TEXT_F(MSG_PASSCODE_REQUEST) : GET_TEXT_F(MSG_PASSCODE_SELECT);
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}
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message_style() = '\0'; // Terminate the string.
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constexpr uint8_t l = TERN(TOUCH_UI_PORTRAIT, 6, 3);
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const uint8_t pressed = EventLoop::get_pressed_tag();
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cmd.font(font_large)
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#if ENABLED(TOUCH_UI_PORTRAIT)
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.text(BTN_POS(1,2), BTN_SIZE(1,1), message)
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.font(font_xlarge)
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.text(BTN_POS(1,4), BTN_SIZE(1,1), mydata.passcode)
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#else
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.text(BTN_POS(1,1), BTN_SIZE(1,1), message)
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.font(font_xlarge)
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.text(BTN_POS(1,2), BTN_SIZE(1,1), mydata.passcode)
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#endif
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.font(font_large)
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.colors(normal_btn)
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#ifdef TOUCH_UI_PASSCODE
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.keys(BTN_POS(1,l+1), BTN_SIZE(1,1), F("123"), pressed)
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.keys(BTN_POS(1,l+2), BTN_SIZE(1,1), F("456"), pressed)
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.keys(BTN_POS(1,l+3), BTN_SIZE(1,1), F("789"), pressed)
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.keys(BTN_POS(1,l+4), BTN_SIZE(1,1), F("0.<"), pressed);
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#else
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.keys(BTN_POS(1,l+1), BTN_SIZE(1,1), F("1234567890"), pressed)
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.keys(BTN_POS(1,l+2), BTN_SIZE(1,1), F("qwertyuiop"), pressed)
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.keys(BTN_POS(1,l+3), BTN_SIZE(1,1), F("asdfghjkl "), pressed)
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.keys(BTN_POS(1,l+4), BTN_SIZE(1,1), F("zxcvbnm!?<"), pressed);
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#endif
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#undef MARGIN_T
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#undef MARGIN_B
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#define MARGIN_T MARGIN_DEFAULT
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#define MARGIN_B MARGIN_DEFAULT
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#undef GRID_COLS
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#undef GRID_ROWS
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}
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}
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char &LockScreen::message_style() {
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// We use the last byte of the passcode string as a flag to indicate,
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// which message to show.
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constexpr uint8_t last_char = sizeof(mydata.passcode)-1;
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return mydata.passcode[last_char];
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}
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void LockScreen::onPasscodeEntered() {
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if (passcode == 0) { // We are defining a passcode
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message_style() = 0;
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onRefresh();
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sound.play(twinkle, PLAY_SYNCHRONOUS);
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passcode = compute_checksum();
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GOTO_PREVIOUS();
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}
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else if (passcode == compute_checksum()) { // We are verifying a passcode
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message_style() = 'g';
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onRefresh();
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sound.play(twinkle, PLAY_SYNCHRONOUS);
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GOTO_PREVIOUS();
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}
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else {
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message_style() = 'w';
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onRefresh();
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sound.play(sad_trombone, PLAY_SYNCHRONOUS);
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current_screen.forget(); // Discard the screen the user was trying to go to.
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GOTO_PREVIOUS();
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}
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}
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bool LockScreen::onTouchEnd(uint8_t tag) {
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char *c = strchr(mydata.passcode,'_');
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if (c) {
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if (tag == '<') {
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if (c != mydata.passcode) {
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// Backspace deletes previous entered characters.
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*--c = '_';
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}
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}
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else {
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// Append character to passcode
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*c++ = tag;
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if (*c == '\0') {
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// If at last character, then process the code.
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onPasscodeEntered();
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}
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}
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}
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return true;
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}
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uint16_t LockScreen::compute_checksum() {
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uint16_t checksum = 0;
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const char* c = mydata.passcode;
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while (*c) {
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checksum = (checksum << 2) ^ *c++;
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}
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if (checksum == 0) checksum = 0xFFFF; // Prevent a zero checksum
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return checksum;
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}
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// This function should be called *after* calling GOTO_SCREEN
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// to move to new screen. If a passcode is enabled, it will
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// immediately jump to the keypad screen, pushing the previous
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// screen onto the stack. If the code is entered correctly,
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// the stack will be popped, allowing the user to proceed to
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// the new screen. Otherwise it will be popped twice, taking
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// the user back to where they were before.
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void LockScreen::check_passcode() {
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if (passcode == 0) return;
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message_style() = 0;
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GOTO_SCREEN(LockScreen);
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}
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bool LockScreen::is_enabled() {
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return passcode != 0;
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}
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void LockScreen::disable() {
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passcode = 0;
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}
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void LockScreen::enable() {
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message_style() = 0;
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passcode = 0;
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GOTO_SCREEN(LockScreen);
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}
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#endif // FTDI_LOCK_SCREEN
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