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281 lines
8.2 KiB
281 lines
8.2 KiB
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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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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* 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 <SDL.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include TREZOR_BOARD
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#ifdef USE_TOUCH
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#include "common.h"
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#include "platform.h"
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#include "touch.h"
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extern int sdl_display_res_x, sdl_display_res_y;
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extern int sdl_touch_offset_x, sdl_touch_offset_y;
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static int _touch_x = 0;
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static int _touch_y = 0;
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// distance from the edge where arrow button swipe starts [px]
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static const int _btn_swipe_begin = 120;
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// length of the arrow button swipe [px]
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static const int _btn_swipe_length = 60;
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// A state machine to handle both mouse inputs (simulating touch) and arrow
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// buttons (to simulate scroll movements). The variable `input_state` is used to
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// ensure that arrow keys are not processed when mouse input is in progress and
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// that mouse actions are not processed while arrow button swipe is not
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// finished.
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typedef enum {
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IDLE,
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MOUSE_DOWN_INSIDE,
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MOUSE_DOWN_OUTSIDE,
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BUTTON_SWIPE_LEFT_INITIATED,
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BUTTON_SWIPE_RIGHT_INITIATED,
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BUTTON_SWIPE_UP_INITIATED,
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BUTTON_SWIPE_DOWN_INITIATED,
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BUTTON_SWIPE_COMPLETED
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} touch_input_state_t;
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static touch_input_state_t input_state = IDLE;
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static bool is_inside_display(int x, int y) {
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return x >= sdl_touch_offset_x && y >= sdl_touch_offset_y &&
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x - sdl_touch_offset_x < sdl_display_res_x &&
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y - sdl_touch_offset_y < sdl_display_res_y;
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}
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static bool is_button_swipe_initiated() {
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return input_state == BUTTON_SWIPE_LEFT_INITIATED ||
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input_state == BUTTON_SWIPE_RIGHT_INITIATED ||
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input_state == BUTTON_SWIPE_UP_INITIATED ||
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input_state == BUTTON_SWIPE_DOWN_INITIATED;
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}
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static void handle_mouse_events(SDL_Event event, int* ev_type, int* ev_x,
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int* ev_y) {
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bool inside_display = is_inside_display(event.button.x, event.button.y);
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switch (event.type) {
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case SDL_MOUSEBUTTONDOWN:
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if (inside_display) {
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*ev_x = event.button.x - sdl_touch_offset_x;
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*ev_y = event.button.y - sdl_touch_offset_y;
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*ev_type = TOUCH_START;
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input_state = MOUSE_DOWN_INSIDE;
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}
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break;
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case SDL_MOUSEBUTTONUP:
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if (input_state != IDLE) {
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*ev_x = inside_display ? event.button.x - sdl_touch_offset_x : _touch_x;
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*ev_y = inside_display ? event.button.y - sdl_touch_offset_y : _touch_y;
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*ev_type = TOUCH_END;
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input_state = IDLE;
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}
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break;
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case SDL_MOUSEMOTION:
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if (input_state != IDLE) {
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if (inside_display) {
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*ev_x = event.motion.x - sdl_touch_offset_x;
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*ev_y = event.motion.y - sdl_touch_offset_y;
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// simulate TOUCH_START if pressed in mouse returned on visible area
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*ev_type =
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(input_state == MOUSE_DOWN_OUTSIDE) ? TOUCH_START : TOUCH_MOVE;
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input_state = MOUSE_DOWN_INSIDE;
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} else {
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if (input_state == MOUSE_DOWN_INSIDE) {
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// use last valid coordinates and simulate TOUCH_END
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*ev_x = _touch_x;
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*ev_y = _touch_y;
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*ev_type = TOUCH_END;
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}
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input_state = MOUSE_DOWN_OUTSIDE;
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}
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}
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break;
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}
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}
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static void handle_button_events(SDL_Event event, int* ev_type, int* ev_x,
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int* ev_y) {
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// Handle arrow buttons to trigger a scroll movement by set length in the
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// direction of the button
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if (event.type == SDL_KEYDOWN && !event.key.repeat &&
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!is_button_swipe_initiated()) {
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switch (event.key.keysym.sym) {
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case SDLK_LEFT:
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*ev_x = _btn_swipe_begin;
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*ev_y = sdl_display_res_y / 2;
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*ev_type = TOUCH_START;
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input_state = BUTTON_SWIPE_LEFT_INITIATED;
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break;
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case SDLK_RIGHT:
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*ev_x = sdl_display_res_x - _btn_swipe_begin;
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*ev_y = sdl_display_res_y / 2;
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*ev_type = TOUCH_START;
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input_state = BUTTON_SWIPE_RIGHT_INITIATED;
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break;
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case SDLK_UP:
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*ev_x = sdl_display_res_x / 2;
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*ev_y = _btn_swipe_begin;
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*ev_type = TOUCH_START;
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input_state = BUTTON_SWIPE_UP_INITIATED;
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break;
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case SDLK_DOWN:
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*ev_x = sdl_display_res_x / 2;
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*ev_y = sdl_display_res_y - _btn_swipe_begin;
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*ev_type = TOUCH_START;
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input_state = BUTTON_SWIPE_DOWN_INITIATED;
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break;
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}
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} else if (event.type == SDL_KEYUP && input_state != IDLE) {
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switch (event.key.keysym.sym) {
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case SDLK_LEFT:
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if (input_state == BUTTON_SWIPE_LEFT_INITIATED) {
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*ev_x = _btn_swipe_begin + _btn_swipe_length;
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*ev_y = sdl_display_res_y / 2;
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*ev_type = TOUCH_MOVE;
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input_state = BUTTON_SWIPE_COMPLETED;
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}
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break;
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case SDLK_RIGHT:
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if (input_state == BUTTON_SWIPE_RIGHT_INITIATED) {
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*ev_x = sdl_display_res_x - _btn_swipe_begin - _btn_swipe_length;
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*ev_y = sdl_display_res_y / 2;
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*ev_type = TOUCH_MOVE;
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input_state = BUTTON_SWIPE_COMPLETED;
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}
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break;
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case SDLK_UP:
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if (input_state == BUTTON_SWIPE_UP_INITIATED) {
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*ev_x = sdl_display_res_x / 2;
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*ev_y = _btn_swipe_begin + _btn_swipe_length;
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*ev_type = TOUCH_MOVE;
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input_state = BUTTON_SWIPE_COMPLETED;
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}
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break;
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case SDLK_DOWN:
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if (input_state == BUTTON_SWIPE_DOWN_INITIATED) {
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*ev_x = sdl_display_res_x / 2;
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*ev_y = sdl_display_res_y - _btn_swipe_begin - _btn_swipe_length;
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*ev_type = TOUCH_MOVE;
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input_state = BUTTON_SWIPE_COMPLETED;
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}
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break;
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}
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}
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}
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uint32_t touch_read(void) {
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if (input_state == BUTTON_SWIPE_COMPLETED) {
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input_state = IDLE;
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return TOUCH_END | touch_pack_xy(_touch_x, _touch_y);
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}
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emulator_poll_events();
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SDL_Event event;
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SDL_PumpEvents();
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int ev_x = 0;
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int ev_y = 0;
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int ev_type = 0;
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while (SDL_PollEvent(&event) > 0) {
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if (input_state == IDLE || input_state == MOUSE_DOWN_INSIDE ||
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input_state == MOUSE_DOWN_OUTSIDE) {
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handle_mouse_events(event, &ev_type, &ev_x, &ev_y);
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}
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if (input_state == IDLE || is_button_swipe_initiated()) {
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handle_button_events(event, &ev_type, &ev_x, &ev_y);
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}
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if (ev_type != 0) {
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_touch_x = ev_x;
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_touch_y = ev_y;
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break;
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}
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}
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return ev_type | touch_pack_xy(ev_x, ev_y);
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}
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secbool touch_init(void) { return sectrue; }
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void touch_power_on(void) {}
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void touch_wait_until_ready(void) {}
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uint32_t touch_is_detected(void) {
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return input_state == MOUSE_DOWN_INSIDE || is_button_swipe_initiated();
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}
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uint8_t touch_get_version(void) { return 0; }
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#endif
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#ifdef USE_BUTTON
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#include "button.h"
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static char last_left = 0, last_right = 0;
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char button_state_left(void) { return last_left; }
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char button_state_right(void) { return last_right; }
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uint32_t button_read(void) {
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SDL_Event event;
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SDL_PumpEvents();
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if (SDL_PollEvent(&event) > 0) {
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switch (event.type) {
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case SDL_KEYDOWN:
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if (event.key.repeat) {
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break;
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}
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switch (event.key.keysym.sym) {
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case SDLK_LEFT:
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last_left = 1;
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return BTN_EVT_DOWN | BTN_LEFT;
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case SDLK_RIGHT:
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last_right = 1;
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return BTN_EVT_DOWN | BTN_RIGHT;
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}
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break;
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case SDL_KEYUP:
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if (event.key.repeat) {
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break;
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}
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switch (event.key.keysym.sym) {
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case SDLK_LEFT:
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last_left = 0;
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return BTN_EVT_UP | BTN_LEFT;
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case SDLK_RIGHT:
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last_right = 0;
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return BTN_EVT_UP | BTN_RIGHT;
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}
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break;
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}
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}
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return 0;
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}
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void button_init(void) {}
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#endif
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