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pandemonium_engine/platform/frt/keyboard_linux_input.cpp

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/*************************************************************************/
/* keyboard_linux_input.cpp */
/*************************************************************************/
/* This file is part of: */
/* PANDEMONIUM ENGINE */
/* https://github.com/Relintai/pandemonium_engine */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
// keyboard_linux_input.cpp
/*
* FRT - A Godot platform targeting single board computers
* Copyright (c) 2017-2019 Emanuele Fornara
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef FRT_TEST
#define FRT_MOCK_GODOT_INPUT_MODIFIER_STATE
#else
#include "core/version.h"
#define FRT_MOCK_GODOT_INPUT_MODIFIER_STATE
#include "core/input/input_event.h"
#endif
#include "frt.h"
#include <stdio.h>
#include <string.h>
#include "bits/linux_input.h"
#include "import/gdkeys.h"
namespace frt {
static struct KeyMap {
int kernel_code;
int gd_code;
} keymap[] = {
{ KEY_SPACE, ' ' },
{ KEY_A, 'A' },
{ KEY_B, 'B' },
{ KEY_C, 'C' },
{ KEY_D, 'D' },
{ KEY_E, 'E' },
{ KEY_F, 'F' },
{ KEY_G, 'G' },
{ KEY_H, 'H' },
{ KEY_I, 'I' },
{ KEY_J, 'J' },
{ KEY_K, 'K' },
{ KEY_L, 'L' },
{ KEY_M, 'M' },
{ KEY_N, 'N' },
{ KEY_O, 'O' },
{ KEY_P, 'P' },
{ KEY_Q, 'Q' },
{ KEY_R, 'R' },
{ KEY_S, 'S' },
{ KEY_T, 'T' },
{ KEY_U, 'U' },
{ KEY_V, 'V' },
{ KEY_W, 'W' },
{ KEY_X, 'X' },
{ KEY_Y, 'Y' },
{ KEY_Z, 'Z' },
{ KEY_0, '0' },
{ KEY_1, '1' },
{ KEY_2, '2' },
{ KEY_3, '3' },
{ KEY_4, '4' },
{ KEY_5, '5' },
{ KEY_6, '6' },
{ KEY_7, '7' },
{ KEY_8, '8' },
{ KEY_9, '9' },
{ KEY_F1, GD_KEY_F1 },
{ KEY_F2, GD_KEY_F2 },
{ KEY_F3, GD_KEY_F3 },
{ KEY_F4, GD_KEY_F4 },
{ KEY_F5, GD_KEY_F5 },
{ KEY_F6, GD_KEY_F6 },
{ KEY_F7, GD_KEY_F7 },
{ KEY_F8, GD_KEY_F8 },
{ KEY_F9, GD_KEY_F9 },
{ KEY_F10, GD_KEY_F10 },
{ KEY_F11, GD_KEY_F11 },
{ KEY_F12, GD_KEY_F12 },
{ KEY_UP, GD_KEY_UP },
{ KEY_DOWN, GD_KEY_DOWN },
{ KEY_LEFT, GD_KEY_LEFT },
{ KEY_RIGHT, GD_KEY_RIGHT },
{ KEY_TAB, GD_KEY_TAB },
{ KEY_BACKSPACE, GD_KEY_BACKSPACE },
{ KEY_INSERT, GD_KEY_INSERT },
{ KEY_DELETE, GD_KEY_DELETE },
{ KEY_HOME, GD_KEY_HOME },
{ KEY_END, GD_KEY_END },
{ KEY_PAGEUP, GD_KEY_PAGEUP },
{ KEY_PAGEDOWN, GD_KEY_PAGEDOWN },
{ KEY_ENTER, GD_KEY_RETURN },
{ KEY_ESC, GD_KEY_ESCAPE },
{ KEY_LEFTCTRL, GD_KEY_CONTROL },
{ KEY_RIGHTCTRL, GD_KEY_CONTROL },
{ KEY_LEFTALT, GD_KEY_ALT },
{ KEY_RIGHTALT, GD_KEY_ALT },
{ KEY_LEFTSHIFT, GD_KEY_SHIFT },
{ KEY_RIGHTSHIFT, GD_KEY_SHIFT },
{ KEY_LEFTMETA, GD_KEY_META },
{ KEY_RIGHTMETA, GD_KEY_META },
{ KEY_KP0, GD_KEY_KP_0 },
{ KEY_KP1, GD_KEY_KP_1 },
{ KEY_KP2, GD_KEY_KP_2 },
{ KEY_KP3, GD_KEY_KP_3 },
{ KEY_KP4, GD_KEY_KP_4 },
{ KEY_KP5, GD_KEY_KP_5 },
{ KEY_KP6, GD_KEY_KP_6 },
{ KEY_KP7, GD_KEY_KP_7 },
{ KEY_KP8, GD_KEY_KP_8 },
{ KEY_KP9, GD_KEY_KP_9 },
{ KEY_KPASTERISK, GD_KEY_KP_MULTIPLY },
{ KEY_KPMINUS, GD_KEY_KP_SUBTRACT },
{ KEY_KPPLUS, GD_KEY_KP_ADD },
{ KEY_KPDOT, GD_KEY_KP_PERIOD },
{ KEY_KPENTER, GD_KEY_KP_ENTER },
{ KEY_KPSLASH, GD_KEY_KP_DIVIDE },
{ 0, 0 },
};
class KeyboardLinuxInput : public Keyboard, public EventDispatcher, public LinuxInput {
private:
static const int left_mask = 0x01;
static const int right_mask = 0x02;
static const int wait_ms = 100;
bool valid;
Handler *h;
bool grabbed;
InputModifierState st;
struct {
int shift;
int alt;
int control;
int meta;
} left_right_mask;
void update_modifier(int in_code, int left_code, int right_code, bool pressed, int &mask, bool &state) {
if (in_code != left_code && in_code != right_code)
return;
if (in_code == left_code) {
if (pressed)
mask |= left_mask;
else
mask &= ~left_mask;
} else if (in_code == right_code) {
if (pressed)
mask |= right_mask;
else
mask &= ~right_mask;
}
state = mask;
}
public:
KeyboardLinuxInput()
: valid(false), h(0), grabbed(false) {
st.shift = false;
st.alt = false;
st.control = false;
st.meta = false;
left_right_mask.shift = 0;
left_right_mask.alt = 0;
left_right_mask.control = 0;
left_right_mask.meta = 0;
}
// Module
const char *get_id() const { return "keyboard_linux_input"; }
bool probe() {
valid = open("FRT_KEYBOARD_ID", "event-kbd");
if (valid)
App::instance()->add_dispatcher(this);
return valid;
}
void cleanup() {
close();
if (valid)
App::instance()->remove_dispatcher(this);
valid = false;
}
bool handle_meta(int gd_code, bool pressed) {
if (pressed)
return false;
switch (gd_code) {
case 'K':
if (LinuxInput::grab(!grabbed, wait_ms))
grabbed = !grabbed;
return true;
default:
return false;
}
}
// LinuxInput
void handle(const input_event &ev) {
if (ev.type != EV_KEY || (ev.value != KV_Pressed && ev.value != KV_Released))
return;
bool pressed = (ev.value == KV_Pressed);
update_modifier(ev.code, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, pressed, left_right_mask.shift, st.shift);
update_modifier(ev.code, KEY_LEFTALT, KEY_RIGHTALT, pressed, left_right_mask.alt, st.alt);
update_modifier(ev.code, KEY_LEFTCTRL, KEY_RIGHTCTRL, pressed, left_right_mask.control, st.control);
update_modifier(ev.code, KEY_LEFTMETA, KEY_RIGHTMETA, pressed, left_right_mask.meta, st.meta);
for (int i = 0; keymap[i].kernel_code; i++) {
if (keymap[i].kernel_code == ev.code) {
if (h)
h->handle_keyboard_key(keymap[i].gd_code, pressed, 0, false);
break;
}
}
}
// EventDispatcher
void dispatch_events() { poll(); }
// Keyboard
void set_handler(Handler *handler) {
h = handler;
grabbed = LinuxInput::grab(true, wait_ms);
}
void get_modifier_state(InputModifierState &state) const { state = st; }
};
FRT_REGISTER(KeyboardLinuxInput)
} // namespace frt
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