/*************************************************************************/
/*  input.cpp                                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* 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.                */
/*************************************************************************/

#include "input.h"

#include "core/input/default_controller_mappings.h"
#include "core/input/input_map.h"
#include "core/os/os.h"
#include "core/project_settings.h"

#ifdef TOOLS_ENABLED
#include "editor/editor_settings.h"
#endif

static const char *_joy_buttons[JOY_SDL_BUTTONS + 1] = {
	"a",
	"b",
	"x",
	"y",
	"back",
	"guide",
	"start",
	"leftstick",
	"rightstick",
	"leftshoulder",
	"rightshoulder",
	"dpup",
	"dpdown",
	"dpleft",
	"dpright",
	nullptr
};

static const char *_joy_button_names[JOY_BUTTON_MAX] = {
	"Face Bottom",
	"Face Right",
	"Face Left",
	"Face Top",
	"Select",
	"Guide",
	"Start",
	"Left Stick",
	"Right Stick",
	"Left Shoulder",
	"Right Shoulder",
	"D-Pad Up",
	"D-Pad Down",
	"D-Pad Left",
	"D-Pad Right",
	"Button 15",
	"Button 16",
	"Button 17",
	"Button 18",
	"Button 19",
	"Button 20",
	"Button 21",
	"Button 22",
	"Button 23",
	"Button 24",
	"Button 25",
	"Button 26",
	"Button 27",
	"Button 28",
	"Button 29",
	"Button 30",
	"Button 31",
	"Button 32",
	"Button 33",
	"Button 34",
	"Button 35"
};

static const char *_joy_axes[JOY_SDL_AXES + 1] = {
	"leftx",
	"lefty",
	"rightx",
	"righty",
	"lefttrigger",
	"righttrigger",
	nullptr
};

static const char *_joy_axis_names[JOY_AXIS_MAX] = {
	"Left Stick X",
	"Left Stick Y",
	"Right Stick X",
	"Right Stick Y",
	"Left Trigger",
	"Right Trigger",
	"Joystick 3 Stick X",
	"Joystick 3 Stick Y",
	"Joystick 4 Stick X",
	"Joystick 4 Stick Y"
};

Input *Input::singleton = nullptr;

void (*Input::set_mouse_mode_func)(Input::MouseMode) = nullptr;
Input::MouseMode (*Input::get_mouse_mode_func)() = nullptr;
void (*Input::warp_mouse_func)(const Vector2 &p_to_pos) = nullptr;
Input::CursorShape (*Input::get_current_cursor_shape_func)() = nullptr;
void (*Input::set_custom_mouse_cursor_func)(const RES &, Input::CursorShape, const Vector2 &) = nullptr;

Input *Input::get_singleton() {
	return singleton;
}

void Input::set_mouse_mode(MouseMode p_mode) {
	ERR_FAIL_INDEX((int)p_mode, 4);
	set_mouse_mode_func(p_mode);
}

Input::MouseMode Input::get_mouse_mode() const {
	return get_mouse_mode_func();
}

void Input::_bind_methods() {
	ClassDB::bind_method(D_METHOD("is_key_pressed", "keycode"), &Input::is_key_pressed);
	ClassDB::bind_method(D_METHOD("is_mouse_button_pressed", "button"), &Input::is_mouse_button_pressed);
	ClassDB::bind_method(D_METHOD("is_joy_button_pressed", "device", "button"), &Input::is_joy_button_pressed);
	ClassDB::bind_method(D_METHOD("is_action_pressed", "action"), &Input::is_action_pressed);
	ClassDB::bind_method(D_METHOD("is_action_just_pressed", "action"), &Input::is_action_just_pressed);
	ClassDB::bind_method(D_METHOD("is_action_just_released", "action"), &Input::is_action_just_released);
	ClassDB::bind_method(D_METHOD("get_action_strength", "action"), &Input::get_action_strength);
	ClassDB::bind_method(D_METHOD("add_joy_mapping", "mapping", "update_existing"), &Input::add_joy_mapping, DEFVAL(false));
	ClassDB::bind_method(D_METHOD("remove_joy_mapping", "guid"), &Input::remove_joy_mapping);
	ClassDB::bind_method(D_METHOD("joy_connection_changed", "device", "connected", "name", "guid"), &Input::joy_connection_changed);
	ClassDB::bind_method(D_METHOD("is_joy_known", "device"), &Input::is_joy_known);
	ClassDB::bind_method(D_METHOD("get_joy_axis", "device", "axis"), &Input::get_joy_axis);
	ClassDB::bind_method(D_METHOD("get_joy_name", "device"), &Input::get_joy_name);
	ClassDB::bind_method(D_METHOD("get_joy_guid", "device"), &Input::get_joy_guid);
	ClassDB::bind_method(D_METHOD("get_connected_joypads"), &Input::get_connected_joypads);
	ClassDB::bind_method(D_METHOD("get_joy_vibration_strength", "device"), &Input::get_joy_vibration_strength);
	ClassDB::bind_method(D_METHOD("get_joy_vibration_duration", "device"), &Input::get_joy_vibration_duration);
	ClassDB::bind_method(D_METHOD("get_joy_button_string", "button_index"), &Input::get_joy_button_string);
	ClassDB::bind_method(D_METHOD("get_joy_button_index_from_string", "button"), &Input::get_joy_button_index_from_string);
	ClassDB::bind_method(D_METHOD("get_joy_axis_string", "axis_index"), &Input::get_joy_axis_string);
	ClassDB::bind_method(D_METHOD("get_joy_axis_index_from_string", "axis"), &Input::get_joy_axis_index_from_string);
	ClassDB::bind_method(D_METHOD("start_joy_vibration", "device", "weak_magnitude", "strong_magnitude", "duration"), &Input::start_joy_vibration, DEFVAL(0));
	ClassDB::bind_method(D_METHOD("stop_joy_vibration", "device"), &Input::stop_joy_vibration);
	ClassDB::bind_method(D_METHOD("vibrate_handheld", "duration_ms"), &Input::vibrate_handheld, DEFVAL(500));
	ClassDB::bind_method(D_METHOD("get_gravity"), &Input::get_gravity);
	ClassDB::bind_method(D_METHOD("get_accelerometer"), &Input::get_accelerometer);
	ClassDB::bind_method(D_METHOD("get_magnetometer"), &Input::get_magnetometer);
	ClassDB::bind_method(D_METHOD("get_gyroscope"), &Input::get_gyroscope);
	ClassDB::bind_method(D_METHOD("get_last_mouse_speed"), &Input::get_last_mouse_speed);
	ClassDB::bind_method(D_METHOD("get_mouse_button_mask"), &Input::get_mouse_button_mask);
	ClassDB::bind_method(D_METHOD("set_mouse_mode", "mode"), &Input::set_mouse_mode);
	ClassDB::bind_method(D_METHOD("get_mouse_mode"), &Input::get_mouse_mode);
	ClassDB::bind_method(D_METHOD("warp_mouse_position", "to"), &Input::warp_mouse_position);
	ClassDB::bind_method(D_METHOD("action_press", "action", "strength"), &Input::action_press, DEFVAL(1.f));
	ClassDB::bind_method(D_METHOD("action_release", "action"), &Input::action_release);
	ClassDB::bind_method(D_METHOD("set_default_cursor_shape", "shape"), &Input::set_default_cursor_shape, DEFVAL(CURSOR_ARROW));
	ClassDB::bind_method(D_METHOD("get_current_cursor_shape"), &Input::get_current_cursor_shape);
	ClassDB::bind_method(D_METHOD("set_custom_mouse_cursor", "image", "shape", "hotspot"), &Input::set_custom_mouse_cursor, DEFVAL(CURSOR_ARROW), DEFVAL(Vector2()));
	ClassDB::bind_method(D_METHOD("parse_input_event", "event"), &Input::parse_input_event);
	ClassDB::bind_method(D_METHOD("set_use_accumulated_input", "enable"), &Input::set_use_accumulated_input);

	BIND_ENUM_CONSTANT(MOUSE_MODE_VISIBLE);
	BIND_ENUM_CONSTANT(MOUSE_MODE_HIDDEN);
	BIND_ENUM_CONSTANT(MOUSE_MODE_CAPTURED);
	BIND_ENUM_CONSTANT(MOUSE_MODE_CONFINED);

	BIND_ENUM_CONSTANT(CURSOR_ARROW);
	BIND_ENUM_CONSTANT(CURSOR_IBEAM);
	BIND_ENUM_CONSTANT(CURSOR_POINTING_HAND);
	BIND_ENUM_CONSTANT(CURSOR_CROSS);
	BIND_ENUM_CONSTANT(CURSOR_WAIT);
	BIND_ENUM_CONSTANT(CURSOR_BUSY);
	BIND_ENUM_CONSTANT(CURSOR_DRAG);
	BIND_ENUM_CONSTANT(CURSOR_CAN_DROP);
	BIND_ENUM_CONSTANT(CURSOR_FORBIDDEN);
	BIND_ENUM_CONSTANT(CURSOR_VSIZE);
	BIND_ENUM_CONSTANT(CURSOR_HSIZE);
	BIND_ENUM_CONSTANT(CURSOR_BDIAGSIZE);
	BIND_ENUM_CONSTANT(CURSOR_FDIAGSIZE);
	BIND_ENUM_CONSTANT(CURSOR_MOVE);
	BIND_ENUM_CONSTANT(CURSOR_VSPLIT);
	BIND_ENUM_CONSTANT(CURSOR_HSPLIT);
	BIND_ENUM_CONSTANT(CURSOR_HELP);

	ADD_SIGNAL(MethodInfo("joy_connection_changed", PropertyInfo(Variant::INT, "device"), PropertyInfo(Variant::BOOL, "connected")));
}

void Input::get_argument_options(const StringName &p_function, int p_idx, List<String> *r_options) const {
#ifdef TOOLS_ENABLED

	const String quote_style = EDITOR_DEF("text_editor/completion/use_single_quotes", 0) ? "'" : "\"";

	String pf = p_function;
	if (p_idx == 0 && (pf == "is_action_pressed" || pf == "action_press" || pf == "action_release" || pf == "is_action_just_pressed" || pf == "is_action_just_released" || pf == "get_action_strength")) {
		List<PropertyInfo> pinfo;
		ProjectSettings::get_singleton()->get_property_list(&pinfo);

		for (List<PropertyInfo>::Element *E = pinfo.front(); E; E = E->next()) {
			const PropertyInfo &pi = E->get();

			if (!pi.name.begins_with("input/")) {
				continue;
			}

			String name = pi.name.substr(pi.name.find("/") + 1, pi.name.length());
			r_options->push_back(quote_style + name + quote_style);
		}
	}
#endif
}

void Input::SpeedTrack::update(const Vector2 &p_delta_p) {
	uint64_t tick = OS::get_singleton()->get_ticks_usec();
	uint32_t tdiff = tick - last_tick;
	float delta_t = tdiff / 1000000.0;
	last_tick = tick;

	accum += p_delta_p;
	accum_t += delta_t;

	if (accum_t > max_ref_frame * 10) {
		accum_t = max_ref_frame * 10;
	}

	while (accum_t >= min_ref_frame) {
		float slice_t = min_ref_frame / accum_t;
		Vector2 slice = accum * slice_t;
		accum = accum - slice;
		accum_t -= min_ref_frame;

		speed = (slice / min_ref_frame).lerp(speed, min_ref_frame / max_ref_frame);
	}
}

void Input::SpeedTrack::reset() {
	last_tick = OS::get_singleton()->get_ticks_usec();
	speed = Vector2();
	accum_t = 0;
}

Input::SpeedTrack::SpeedTrack() {
	min_ref_frame = 0.1;
	max_ref_frame = 0.3;
	reset();
}

bool Input::is_key_pressed(int p_keycode) const {
	_THREAD_SAFE_METHOD_
	return keys_pressed.has(p_keycode);
}

bool Input::is_mouse_button_pressed(int p_button) const {
	_THREAD_SAFE_METHOD_
	return (mouse_button_mask & (1 << (p_button - 1))) != 0;
}

static int _combine_device(int p_value, int p_device) {
	return p_value | (p_device << 20);
}

bool Input::is_joy_button_pressed(int p_device, int p_button) const {
	_THREAD_SAFE_METHOD_
	return joy_buttons_pressed.has(_combine_device(p_button, p_device));
}

bool Input::is_action_pressed(const StringName &p_action) const {
	return action_state.has(p_action) && action_state[p_action].pressed;
}

bool Input::is_action_just_pressed(const StringName &p_action) const {
	const Map<StringName, Action>::Element *E = action_state.find(p_action);
	if (!E) {
		return false;
	}

	if (Engine::get_singleton()->is_in_physics_frame()) {
		return E->get().pressed && E->get().physics_frame == Engine::get_singleton()->get_physics_frames();
	} else {
		return E->get().pressed && E->get().idle_frame == Engine::get_singleton()->get_idle_frames();
	}
}

bool Input::is_action_just_released(const StringName &p_action) const {
	const Map<StringName, Action>::Element *E = action_state.find(p_action);
	if (!E) {
		return false;
	}

	if (Engine::get_singleton()->is_in_physics_frame()) {
		return !E->get().pressed && E->get().physics_frame == Engine::get_singleton()->get_physics_frames();
	} else {
		return !E->get().pressed && E->get().idle_frame == Engine::get_singleton()->get_idle_frames();
	}
}

float Input::get_action_strength(const StringName &p_action) const {
	const Map<StringName, Action>::Element *E = action_state.find(p_action);
	if (!E) {
		return 0.0f;
	}

	return E->get().strength;
}

float Input::get_joy_axis(int p_device, int p_axis) const {
	_THREAD_SAFE_METHOD_
	int c = _combine_device(p_axis, p_device);
	if (_joy_axis.has(c)) {
		return _joy_axis[c];
	} else {
		return 0;
	}
}

String Input::get_joy_name(int p_idx) {
	_THREAD_SAFE_METHOD_
	return joy_names[p_idx].name;
};

Vector2 Input::get_joy_vibration_strength(int p_device) {
	if (joy_vibration.has(p_device)) {
		return Vector2(joy_vibration[p_device].weak_magnitude, joy_vibration[p_device].strong_magnitude);
	} else {
		return Vector2(0, 0);
	}
}

uint64_t Input::get_joy_vibration_timestamp(int p_device) {
	if (joy_vibration.has(p_device)) {
		return joy_vibration[p_device].timestamp;
	} else {
		return 0;
	}
}

float Input::get_joy_vibration_duration(int p_device) {
	if (joy_vibration.has(p_device)) {
		return joy_vibration[p_device].duration;
	} else {
		return 0.f;
	}
}

static String _hex_str(uint8_t p_byte) {
	static const char *dict = "0123456789abcdef";
	char ret[3];
	ret[2] = 0;

	ret[0] = dict[p_byte >> 4];
	ret[1] = dict[p_byte & 0xf];

	return ret;
};

void Input::joy_connection_changed(int p_idx, bool p_connected, String p_name, String p_guid) {
	_THREAD_SAFE_METHOD_
	Joypad js;
	js.name = p_connected ? p_name : "";
	js.uid = p_connected ? p_guid : "";

	if (p_connected) {
		String uidname = p_guid;
		if (p_guid == "") {
			int uidlen = MIN(p_name.length(), 16);
			for (int i = 0; i < uidlen; i++) {
				uidname = uidname + _hex_str(p_name[i]);
			};
		};
		js.uid = uidname;
		js.connected = true;
		int mapping = fallback_mapping;
		for (int i = 0; i < map_db.size(); i++) {
			if (js.uid == map_db[i].uid) {
				mapping = i;
				js.name = map_db[i].name;
			};
		};
		js.mapping = mapping;
	} else {
		js.connected = false;
		for (int i = 0; i < JOY_BUTTON_MAX; i++) {
			int c = _combine_device(i, p_idx);
			joy_buttons_pressed.erase(c);
		}
		for (int i = 0; i < JOY_AXIS_MAX; i++) {
			set_joy_axis(p_idx, i, 0.0f);
		}
	};
	joy_names[p_idx] = js;

	emit_signal("joy_connection_changed", p_idx, p_connected);
};

Vector3 Input::get_gravity() const {
	_THREAD_SAFE_METHOD_
	return gravity;
}

Vector3 Input::get_accelerometer() const {
	_THREAD_SAFE_METHOD_
	return accelerometer;
}

Vector3 Input::get_magnetometer() const {
	_THREAD_SAFE_METHOD_
	return magnetometer;
}

Vector3 Input::get_gyroscope() const {
	_THREAD_SAFE_METHOD_
	return gyroscope;
}

void Input::parse_input_event(const Ref<InputEvent> &p_event) {
	_parse_input_event_impl(p_event, false);
}

void Input::_parse_input_event_impl(const Ref<InputEvent> &p_event, bool p_is_emulated) {
	// Notes on mouse-touch emulation:
	// - Emulated mouse events are parsed, that is, re-routed to this method, so they make the same effects
	//   as true mouse events. The only difference is the situation is flagged as emulated so they are not
	//   emulated back to touch events in an endless loop.
	// - Emulated touch events are handed right to the main loop (i.e., the SceneTree) because they don't
	//   require additional handling by this class.

	_THREAD_SAFE_METHOD_

	Ref<InputEventKey> k = p_event;
	if (k.is_valid() && !k->is_echo() && k->get_keycode() != 0) {
		if (k->is_pressed()) {
			keys_pressed.insert(k->get_keycode());
		} else {
			keys_pressed.erase(k->get_keycode());
		}
	}

	Ref<InputEventMouseButton> mb = p_event;

	if (mb.is_valid()) {
		if (mb->is_pressed()) {
			mouse_button_mask |= (1 << (mb->get_button_index() - 1));
		} else {
			mouse_button_mask &= ~(1 << (mb->get_button_index() - 1));
		}

		Point2 pos = mb->get_global_position();
		if (mouse_pos != pos) {
			set_mouse_position(pos);
		}

		if (event_dispatch_function && emulate_touch_from_mouse && !p_is_emulated && mb->get_button_index() == 1) {
			Ref<InputEventScreenTouch> touch_event;
			touch_event.instance();
			touch_event->set_pressed(mb->is_pressed());
			touch_event->set_position(mb->get_position());
			event_dispatch_function(touch_event);
		}
	}

	Ref<InputEventMouseMotion> mm = p_event;

	if (mm.is_valid()) {
		Point2 pos = mm->get_global_position();
		if (mouse_pos != pos) {
			set_mouse_position(pos);
		}

		if (event_dispatch_function && emulate_touch_from_mouse && !p_is_emulated && mm->get_button_mask() & 1) {
			Ref<InputEventScreenDrag> drag_event;
			drag_event.instance();

			drag_event->set_position(mm->get_position());
			drag_event->set_relative(mm->get_relative());
			drag_event->set_speed(mm->get_speed());

			event_dispatch_function(drag_event);
		}
	}

	Ref<InputEventScreenTouch> st = p_event;

	if (st.is_valid()) {
		if (st->is_pressed()) {
			SpeedTrack &track = touch_speed_track[st->get_index()];
			track.reset();
		} else {
			// Since a pointer index may not occur again (OSs may or may not reuse them),
			// imperatively remove it from the map to keep no fossil entries in it
			touch_speed_track.erase(st->get_index());
		}

		if (emulate_mouse_from_touch) {
			bool translate = false;
			if (st->is_pressed()) {
				if (mouse_from_touch_index == -1) {
					translate = true;
					mouse_from_touch_index = st->get_index();
				}
			} else {
				if (st->get_index() == mouse_from_touch_index) {
					translate = true;
					mouse_from_touch_index = -1;
				}
			}

			if (translate) {
				Ref<InputEventMouseButton> button_event;
				button_event.instance();

				button_event->set_device(InputEvent::DEVICE_ID_TOUCH_MOUSE);
				button_event->set_position(st->get_position());
				button_event->set_global_position(st->get_position());
				button_event->set_pressed(st->is_pressed());
				button_event->set_button_index(BUTTON_LEFT);
				if (st->is_pressed()) {
					button_event->set_button_mask(mouse_button_mask | (1 << (BUTTON_LEFT - 1)));
				} else {
					button_event->set_button_mask(mouse_button_mask & ~(1 << (BUTTON_LEFT - 1)));
				}

				_parse_input_event_impl(button_event, true);
			}
		}
	}

	Ref<InputEventScreenDrag> sd = p_event;

	if (sd.is_valid()) {
		SpeedTrack &track = touch_speed_track[sd->get_index()];
		track.update(sd->get_relative());
		sd->set_speed(track.speed);

		if (emulate_mouse_from_touch && sd->get_index() == mouse_from_touch_index) {
			Ref<InputEventMouseMotion> motion_event;
			motion_event.instance();

			motion_event->set_device(InputEvent::DEVICE_ID_TOUCH_MOUSE);
			motion_event->set_position(sd->get_position());
			motion_event->set_global_position(sd->get_position());
			motion_event->set_relative(sd->get_relative());
			motion_event->set_speed(sd->get_speed());
			motion_event->set_button_mask(mouse_button_mask);

			_parse_input_event_impl(motion_event, true);
		}
	}

	Ref<InputEventJoypadButton> jb = p_event;

	if (jb.is_valid()) {
		int c = _combine_device(jb->get_button_index(), jb->get_device());

		if (jb->is_pressed()) {
			joy_buttons_pressed.insert(c);
		} else {
			joy_buttons_pressed.erase(c);
		}
	}

	Ref<InputEventJoypadMotion> jm = p_event;

	if (jm.is_valid()) {
		set_joy_axis(jm->get_device(), jm->get_axis(), jm->get_axis_value());
	}

	Ref<InputEventGesture> ge = p_event;

	if (ge.is_valid()) {
		if (event_dispatch_function) {
			event_dispatch_function(ge);
		}
	}

	for (const Map<StringName, InputMap::Action>::Element *E = InputMap::get_singleton()->get_action_map().front(); E; E = E->next()) {
		if (InputMap::get_singleton()->event_is_action(p_event, E->key())) {
			// Save the action's state
			if (!p_event->is_echo() && is_action_pressed(E->key()) != p_event->is_action_pressed(E->key())) {
				Action action;
				action.physics_frame = Engine::get_singleton()->get_physics_frames();
				action.idle_frame = Engine::get_singleton()->get_idle_frames();
				action.pressed = p_event->is_action_pressed(E->key());
				action.strength = 0.f;
				action_state[E->key()] = action;
			}
			action_state[E->key()].strength = p_event->get_action_strength(E->key());
		}
	}

	if (event_dispatch_function) {
		event_dispatch_function(p_event);
	}
}

void Input::set_joy_axis(int p_device, int p_axis, float p_value) {
	_THREAD_SAFE_METHOD_
	int c = _combine_device(p_axis, p_device);
	_joy_axis[c] = p_value;
}

void Input::start_joy_vibration(int p_device, float p_weak_magnitude, float p_strong_magnitude, float p_duration) {
	_THREAD_SAFE_METHOD_
	if (p_weak_magnitude < 0.f || p_weak_magnitude > 1.f || p_strong_magnitude < 0.f || p_strong_magnitude > 1.f) {
		return;
	}
	VibrationInfo vibration;
	vibration.weak_magnitude = p_weak_magnitude;
	vibration.strong_magnitude = p_strong_magnitude;
	vibration.duration = p_duration;
	vibration.timestamp = OS::get_singleton()->get_ticks_usec();
	joy_vibration[p_device] = vibration;
}

void Input::stop_joy_vibration(int p_device) {
	_THREAD_SAFE_METHOD_
	VibrationInfo vibration;
	vibration.weak_magnitude = 0;
	vibration.strong_magnitude = 0;
	vibration.duration = 0;
	vibration.timestamp = OS::get_singleton()->get_ticks_usec();
	joy_vibration[p_device] = vibration;
}

void Input::vibrate_handheld(int p_duration_ms) {
	OS::get_singleton()->vibrate_handheld(p_duration_ms);
}

void Input::set_gravity(const Vector3 &p_gravity) {
	_THREAD_SAFE_METHOD_

	gravity = p_gravity;
}

void Input::set_accelerometer(const Vector3 &p_accel) {
	_THREAD_SAFE_METHOD_

	accelerometer = p_accel;
}

void Input::set_magnetometer(const Vector3 &p_magnetometer) {
	_THREAD_SAFE_METHOD_

	magnetometer = p_magnetometer;
}

void Input::set_gyroscope(const Vector3 &p_gyroscope) {
	_THREAD_SAFE_METHOD_

	gyroscope = p_gyroscope;
}

void Input::set_mouse_position(const Point2 &p_posf) {
	mouse_speed_track.update(p_posf - mouse_pos);
	mouse_pos = p_posf;
}

Point2 Input::get_mouse_position() const {
	return mouse_pos;
}

Point2 Input::get_last_mouse_speed() const {
	return mouse_speed_track.speed;
}

int Input::get_mouse_button_mask() const {
	return mouse_button_mask; // do not trust OS implementation, should remove it - OS::get_singleton()->get_mouse_button_state();
}

void Input::warp_mouse_position(const Vector2 &p_to) {
	warp_mouse_func(p_to);
}

Point2i Input::warp_mouse_motion(const Ref<InputEventMouseMotion> &p_motion, const Rect2 &p_rect) {
	// The relative distance reported for the next event after a warp is in the boundaries of the
	// size of the rect on that axis, but it may be greater, in which case there's not problem as fmod()
	// will warp it, but if the pointer has moved in the opposite direction between the pointer relocation
	// and the subsequent event, the reported relative distance will be less than the size of the rect
	// and thus fmod() will be disabled for handling the situation.
	// And due to this mouse warping mechanism being stateless, we need to apply some heuristics to
	// detect the warp: if the relative distance is greater than the half of the size of the relevant rect
	// (checked per each axis), it will be considered as the consequence of a former pointer warp.

	const Point2i rel_sgn(p_motion->get_relative().x >= 0.0f ? 1 : -1, p_motion->get_relative().y >= 0.0 ? 1 : -1);
	const Size2i warp_margin = p_rect.size * 0.5f;
	const Point2i rel_warped(
			Math::fmod(p_motion->get_relative().x + rel_sgn.x * warp_margin.x, p_rect.size.x) - rel_sgn.x * warp_margin.x,
			Math::fmod(p_motion->get_relative().y + rel_sgn.y * warp_margin.y, p_rect.size.y) - rel_sgn.y * warp_margin.y);

	const Point2i pos_local = p_motion->get_global_position() - p_rect.position;
	const Point2i pos_warped(Math::fposmod(pos_local.x, p_rect.size.x), Math::fposmod(pos_local.y, p_rect.size.y));
	if (pos_warped != pos_local) {
		warp_mouse_position(pos_warped + p_rect.position);
	}

	return rel_warped;
}

void Input::iteration(float p_step) {
}

void Input::action_press(const StringName &p_action, float p_strength) {
	Action action;

	action.physics_frame = Engine::get_singleton()->get_physics_frames();
	action.idle_frame = Engine::get_singleton()->get_idle_frames();
	action.pressed = true;
	action.strength = p_strength;

	action_state[p_action] = action;
}

void Input::action_release(const StringName &p_action) {
	Action action;

	action.physics_frame = Engine::get_singleton()->get_physics_frames();
	action.idle_frame = Engine::get_singleton()->get_idle_frames();
	action.pressed = false;
	action.strength = 0.f;

	action_state[p_action] = action;
}

void Input::set_emulate_touch_from_mouse(bool p_emulate) {
	emulate_touch_from_mouse = p_emulate;
}

bool Input::is_emulating_touch_from_mouse() const {
	return emulate_touch_from_mouse;
}

// Calling this whenever the game window is focused helps unstucking the "touch mouse"
// if the OS or its abstraction class hasn't properly reported that touch pointers raised
void Input::ensure_touch_mouse_raised() {
	if (mouse_from_touch_index != -1) {
		mouse_from_touch_index = -1;

		Ref<InputEventMouseButton> button_event;
		button_event.instance();

		button_event->set_device(InputEvent::DEVICE_ID_TOUCH_MOUSE);
		button_event->set_position(mouse_pos);
		button_event->set_global_position(mouse_pos);
		button_event->set_pressed(false);
		button_event->set_button_index(BUTTON_LEFT);
		button_event->set_button_mask(mouse_button_mask & ~(1 << (BUTTON_LEFT - 1)));

		_parse_input_event_impl(button_event, true);
	}
}

void Input::set_emulate_mouse_from_touch(bool p_emulate) {
	emulate_mouse_from_touch = p_emulate;
}

bool Input::is_emulating_mouse_from_touch() const {
	return emulate_mouse_from_touch;
}

Input::CursorShape Input::get_default_cursor_shape() const {
	return default_shape;
}

void Input::set_default_cursor_shape(CursorShape p_shape) {
	if (default_shape == p_shape) {
		return;
	}

	default_shape = p_shape;
	// The default shape is set in Viewport::_gui_input_event. To instantly
	// see the shape in the viewport we need to trigger a mouse motion event.
	Ref<InputEventMouseMotion> mm;
	mm.instance();
	mm->set_position(mouse_pos);
	mm->set_global_position(mouse_pos);
	parse_input_event(mm);
}

Input::CursorShape Input::get_current_cursor_shape() const {
	return get_current_cursor_shape_func();
}

void Input::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
	if (Engine::get_singleton()->is_editor_hint()) {
		return;
	}

	set_custom_mouse_cursor_func(p_cursor, p_shape, p_hotspot);
}

void Input::accumulate_input_event(const Ref<InputEvent> &p_event) {
	ERR_FAIL_COND(p_event.is_null());

	if (!use_accumulated_input) {
		parse_input_event(p_event);
		return;
	}
	if (!accumulated_events.empty() && accumulated_events.back()->get()->accumulate(p_event)) {
		return; //event was accumulated, exit
	}

	accumulated_events.push_back(p_event);
}

void Input::flush_accumulated_events() {
	while (accumulated_events.front()) {
		parse_input_event(accumulated_events.front()->get());
		accumulated_events.pop_front();
	}
}

void Input::set_use_accumulated_input(bool p_enable) {
	use_accumulated_input = p_enable;
}

void Input::release_pressed_events() {
	flush_accumulated_events(); // this is needed to release actions strengths

	keys_pressed.clear();
	joy_buttons_pressed.clear();
	_joy_axis.clear();

	for (Map<StringName, Input::Action>::Element *E = action_state.front(); E; E = E->next()) {
		if (E->get().pressed) {
			action_release(E->key());
		}
	}
}

void Input::set_event_dispatch_function(EventDispatchFunc p_function) {
	event_dispatch_function = p_function;
}

void Input::joy_button(int p_device, int p_button, bool p_pressed) {
	_THREAD_SAFE_METHOD_;
	Joypad &joy = joy_names[p_device];
	//printf("got button %i, mapping is %i\n", p_button, joy.mapping);
	if (joy.last_buttons[p_button] == p_pressed) {
		return;
	}
	joy.last_buttons[p_button] = p_pressed;
	if (joy.mapping == -1) {
		_button_event(p_device, p_button, p_pressed);
		return;
	}

	JoyEvent map = _get_mapped_button_event(map_db[joy.mapping], p_button);

	if (map.type == TYPE_BUTTON) {
		_button_event(p_device, map.index, p_pressed);
		return;
	}

	if (map.type == TYPE_AXIS) {
		_axis_event(p_device, map.index, p_pressed ? 1.0 : 0.0);
	}
	// no event?
}

void Input::joy_axis(int p_device, int p_axis, const JoyAxis &p_value) {
	_THREAD_SAFE_METHOD_;

	ERR_FAIL_INDEX(p_axis, JOY_AXIS_MAX);

	Joypad &joy = joy_names[p_device];

	if (joy.last_axis[p_axis] == p_value.value) {
		return;
	}

	if (p_value.value > joy.last_axis[p_axis]) {
		if (p_value.value < joy.last_axis[p_axis] + joy.filter) {
			return;
		}
	} else if (p_value.value > joy.last_axis[p_axis] - joy.filter) {
		return;
	}

	//when changing direction quickly, insert fake event to release pending inputmap actions
	float last = joy.last_axis[p_axis];
	if (p_value.min == 0 && (last < 0.25 || last > 0.75) && (last - 0.5) * (p_value.value - 0.5) < 0) {
		JoyAxis jx;
		jx.min = p_value.min;
		jx.value = p_value.value < 0.5 ? 0.6 : 0.4;
		joy_axis(p_device, p_axis, jx);
	} else if (ABS(last) > 0.5 && last * p_value.value < 0) {
		JoyAxis jx;
		jx.min = p_value.min;
		jx.value = p_value.value < 0 ? 0.1 : -0.1;
		joy_axis(p_device, p_axis, jx);
	}

	joy.last_axis[p_axis] = p_value.value;
	float val = p_value.min == 0 ? -1.0f + 2.0f * p_value.value : p_value.value;

	if (joy.mapping == -1) {
		_axis_event(p_device, p_axis, val);
		return;
	};

	JoyEvent map = _get_mapped_axis_event(map_db[joy.mapping], p_axis, p_value);

	if (map.type == TYPE_BUTTON) {
		if (map.index == JOY_BUTTON_DPAD_UP || map.index == JOY_BUTTON_DPAD_DOWN) {
			bool pressed = p_value.value != 0.0f;
			int button = p_value.value < 0 ? JOY_BUTTON_DPAD_UP : JOY_BUTTON_DPAD_DOWN;

			if (!pressed) {
				if (joy_buttons_pressed.has(_combine_device(JOY_BUTTON_DPAD_UP, p_device))) {
					_button_event(p_device, JOY_BUTTON_DPAD_UP, false);
				}
				if (joy_buttons_pressed.has(_combine_device(JOY_BUTTON_DPAD_DOWN, p_device))) {
					_button_event(p_device, JOY_BUTTON_DPAD_DOWN, false);
				}
			}
			if (pressed == joy_buttons_pressed.has(_combine_device(button, p_device))) {
				return;
			}
			_button_event(p_device, button, true);
			return;
		}

		if (map.index == JOY_BUTTON_DPAD_LEFT || map.index == JOY_BUTTON_DPAD_RIGHT) {
			bool pressed = p_value.value != 0.0f;
			int button = p_value.value < 0 ? JOY_BUTTON_DPAD_LEFT : JOY_BUTTON_DPAD_RIGHT;

			if (!pressed) {
				if (joy_buttons_pressed.has(_combine_device(JOY_BUTTON_DPAD_LEFT, p_device))) {
					_button_event(p_device, JOY_BUTTON_DPAD_LEFT, false);
				}
				if (joy_buttons_pressed.has(_combine_device(JOY_BUTTON_DPAD_RIGHT, p_device))) {
					_button_event(p_device, JOY_BUTTON_DPAD_RIGHT, false);
				}
			}
			if (pressed == joy_buttons_pressed.has(_combine_device(button, p_device))) {
				return;
			}
			_button_event(p_device, button, true);
			return;
		}

		float deadzone = p_value.min == 0 ? 0.5f : 0.0f;
		bool pressed = p_value.value > deadzone;
		if (pressed == joy_buttons_pressed.has(_combine_device(map.index, p_device))) {
			// button already pressed or released, this is an axis bounce value
			return;
		}

		_button_event(p_device, map.index, pressed);
		return;
	}

	if (map.type == TYPE_AXIS) {
		_axis_event(p_device, map.index, map.value);
		return;
	}
	//printf("invalid mapping\n");
}

void Input::joy_hat(int p_device, int p_val) {
	_THREAD_SAFE_METHOD_;
	const Joypad &joy = joy_names[p_device];

	JoyEvent map[HAT_MAX];

	map[HAT_UP].type = TYPE_BUTTON;
	map[HAT_UP].index = JOY_BUTTON_DPAD_UP;
	map[HAT_UP].value = 0;

	map[HAT_RIGHT].type = TYPE_BUTTON;
	map[HAT_RIGHT].index = JOY_BUTTON_DPAD_RIGHT;
	map[HAT_RIGHT].value = 0;

	map[HAT_DOWN].type = TYPE_BUTTON;
	map[HAT_DOWN].index = JOY_BUTTON_DPAD_DOWN;
	map[HAT_DOWN].value = 0;

	map[HAT_LEFT].type = TYPE_BUTTON;
	map[HAT_LEFT].index = JOY_BUTTON_DPAD_LEFT;
	map[HAT_LEFT].value = 0;

	if (joy.mapping != -1) {
		_get_mapped_hat_events(map_db[joy.mapping], 0, map);
	};

	int cur_val = joy_names[p_device].hat_current;

	if ((p_val & HAT_MASK_UP) != (cur_val & HAT_MASK_UP)) {
		_button_event(p_device, map[HAT_UP].index, p_val & HAT_MASK_UP);
	}

	if ((p_val & HAT_MASK_RIGHT) != (cur_val & HAT_MASK_RIGHT)) {
		_button_event(p_device, map[HAT_RIGHT].index, p_val & HAT_MASK_RIGHT);
	}
	if ((p_val & HAT_MASK_DOWN) != (cur_val & HAT_MASK_DOWN)) {
		_button_event(p_device, map[HAT_DOWN].index, p_val & HAT_MASK_DOWN);
	}
	if ((p_val & HAT_MASK_LEFT) != (cur_val & HAT_MASK_LEFT)) {
		_button_event(p_device, map[HAT_LEFT].index, p_val & HAT_MASK_LEFT);
	}

	joy_names[p_device].hat_current = p_val;
}

void Input::_button_event(int p_device, int p_index, bool p_pressed) {
	Ref<InputEventJoypadButton> ievent;
	ievent.instance();
	ievent->set_device(p_device);
	ievent->set_button_index(p_index);
	ievent->set_pressed(p_pressed);

	parse_input_event(ievent);
}

void Input::_axis_event(int p_device, int p_axis, float p_value) {
	Ref<InputEventJoypadMotion> ievent;
	ievent.instance();
	ievent->set_device(p_device);
	ievent->set_axis(p_axis);
	ievent->set_axis_value(p_value);

	parse_input_event(ievent);
};

Input::JoyEvent Input::_get_mapped_button_event(const JoyDeviceMapping &mapping, int p_button) {
	JoyEvent event;
	event.type = TYPE_MAX;

	for (int i = 0; i < mapping.bindings.size(); i++) {
		const JoyBinding binding = mapping.bindings[i];
		if (binding.inputType == TYPE_BUTTON && binding.input.button == p_button) {
			event.type = binding.outputType;
			switch (binding.outputType) {
				case TYPE_BUTTON:
					event.index = binding.output.button;
					return event;
				case TYPE_AXIS:
					event.index = binding.output.axis.axis;
					return event;
				default:
					ERR_PRINT_ONCE("Joypad button mapping error.");
			}
		}
	}
	return event;
}

Input::JoyEvent Input::_get_mapped_axis_event(const JoyDeviceMapping &mapping, int p_axis, const JoyAxis &p_value) {
	JoyEvent event;
	event.type = TYPE_MAX;

	for (int i = 0; i < mapping.bindings.size(); i++) {
		const JoyBinding binding = mapping.bindings[i];
		if (binding.inputType == TYPE_AXIS && binding.input.axis.axis == p_axis) {
			float value = p_value.value;
			if (binding.input.axis.invert) {
				value = -value;
			}
			if (binding.input.axis.range == FULL_AXIS ||
					(binding.input.axis.range == POSITIVE_HALF_AXIS && value > 0) ||
					(binding.input.axis.range == NEGATIVE_HALF_AXIS && value < 0)) {
				event.type = binding.outputType;
				switch (binding.outputType) {
					case TYPE_BUTTON:
						event.index = binding.output.button;
						return event;
					case TYPE_AXIS:
						event.index = binding.output.axis.axis;
						event.value = value;
						if (binding.output.axis.range != binding.input.axis.range) {
							float shifted_positive_value = 0;
							switch (binding.input.axis.range) {
								case POSITIVE_HALF_AXIS:
									shifted_positive_value = value;
									break;
								case NEGATIVE_HALF_AXIS:
									shifted_positive_value = value + 1;
									break;
								case FULL_AXIS:
									shifted_positive_value = (value + 1) / 2;
									break;
							}
							switch (binding.output.axis.range) {
								case POSITIVE_HALF_AXIS:
									event.value = shifted_positive_value;
									break;
								case NEGATIVE_HALF_AXIS:
									event.value = shifted_positive_value - 1;
									break;
								case FULL_AXIS:
									event.value = (shifted_positive_value * 2) - 1;
									break;
							}
						}
						return event;
					default:
						ERR_PRINT_ONCE("Joypad axis mapping error.");
				}
			}
		}
	}
	return event;
}

void Input::_get_mapped_hat_events(const JoyDeviceMapping &mapping, int p_hat, JoyEvent r_events[]) {
	for (int i = 0; i < mapping.bindings.size(); i++) {
		const JoyBinding binding = mapping.bindings[i];
		if (binding.inputType == TYPE_HAT && binding.input.hat.hat == p_hat) {
			int index;
			switch (binding.input.hat.hat_mask) {
				case HAT_MASK_UP:
					index = 0;
					break;
				case HAT_MASK_RIGHT:
					index = 1;
					break;
				case HAT_MASK_DOWN:
					index = 2;
					break;
				case HAT_MASK_LEFT:
					index = 3;
					break;
				default:
					ERR_PRINT_ONCE("Joypad button mapping error.");
					continue;
			}

			r_events[index].type = binding.outputType;
			switch (binding.outputType) {
				case TYPE_BUTTON:
					r_events[index].index = binding.output.button;
					break;
				case TYPE_AXIS:
					r_events[index].index = binding.output.axis.axis;
					break;
				default:
					ERR_PRINT_ONCE("Joypad button mapping error.");
			}
		}
	}
}

JoyButtonList Input::_get_output_button(String output) {
	for (int i = 0; _joy_buttons[i]; i++) {
		if (output == _joy_buttons[i]) {
			return JoyButtonList(i);
		}
	}
	return JoyButtonList::JOY_INVALID_BUTTON;
}

JoyAxisList Input::_get_output_axis(String output) {
	for (int i = 0; _joy_axes[i]; i++) {
		if (output == _joy_axes[i]) {
			return JoyAxisList(i);
		}
	}
	return JoyAxisList::JOY_INVALID_AXIS;
}

void Input::parse_mapping(String p_mapping) {
	_THREAD_SAFE_METHOD_;
	JoyDeviceMapping mapping;

	Vector<String> entry = p_mapping.split(",");
	if (entry.size() < 2) {
		return;
	}

	CharString uid;
	uid.resize(17);

	mapping.uid = entry[0];
	mapping.name = entry[1];

	int idx = 1;
	while (++idx < entry.size()) {
		if (entry[idx] == "") {
			continue;
		}

		String output = entry[idx].get_slice(":", 0).replace(" ", "");
		String input = entry[idx].get_slice(":", 1).replace(" ", "");
		ERR_CONTINUE_MSG(output.length() < 1 || input.length() < 2,
				String(entry[idx] + "\nInvalid device mapping entry: " + entry[idx]));

		if (output == "platform") {
			continue;
		}

		JoyAxisRange output_range = FULL_AXIS;
		if (output[0] == '+' || output[0] == '-') {
			ERR_CONTINUE_MSG(output.length() < 2, String(entry[idx] + "\nInvalid output: " + entry[idx]));
			output = output.right(1);
			if (output[0] == '+') {
				output_range = POSITIVE_HALF_AXIS;
			} else if (output[0] == '-') {
				output_range = NEGATIVE_HALF_AXIS;
			}
		}

		JoyAxisRange input_range = FULL_AXIS;
		if (input[0] == '+') {
			input_range = POSITIVE_HALF_AXIS;
			input = input.right(1);
		} else if (input[0] == '-') {
			input_range = NEGATIVE_HALF_AXIS;
			input = input.right(1);
		}
		bool invert_axis = false;
		if (input[input.length() - 1] == '~') {
			invert_axis = true;
		}

		JoyButtonList output_button = _get_output_button(output);
		JoyAxisList output_axis = _get_output_axis(output);
		ERR_CONTINUE_MSG(output_button == JOY_INVALID_BUTTON && output_axis == JOY_INVALID_AXIS,
				String(entry[idx] + "\nUnrecognised output string: " + output));
		ERR_CONTINUE_MSG(output_button != JOY_INVALID_BUTTON && output_axis != JOY_INVALID_AXIS,
				String("BUG: Output string matched both button and axis: " + output));

		JoyBinding binding;
		if (output_button != JOY_INVALID_BUTTON) {
			binding.outputType = TYPE_BUTTON;
			binding.output.button = output_button;
		} else if (output_axis != JOY_INVALID_AXIS) {
			binding.outputType = TYPE_AXIS;
			binding.output.axis.axis = output_axis;
			binding.output.axis.range = output_range;
		}

		switch (input[0]) {
			case 'b':
				binding.inputType = TYPE_BUTTON;
				binding.input.button = input.right(1).to_int();
				break;
			case 'a':
				binding.inputType = TYPE_AXIS;
				binding.input.axis.axis = input.right(1).to_int();
				binding.input.axis.range = input_range;
				binding.input.axis.invert = invert_axis;
				break;
			case 'h':
				ERR_CONTINUE_MSG(input.length() != 4 || input[2] != '.',
						String(entry[idx] + "\nInvalid hat input: " + input));
				binding.inputType = TYPE_HAT;
				binding.input.hat.hat = input.substr(1, 1).to_int();
				binding.input.hat.hat_mask = static_cast<HatMask>(input.right(3).to_int());
				break;
			default:
				ERR_CONTINUE_MSG(true, String(entry[idx] + "\nUnrecognised input string: " + input));
		}

		mapping.bindings.push_back(binding);
	};

	map_db.push_back(mapping);
};

void Input::add_joy_mapping(String p_mapping, bool p_update_existing) {
	parse_mapping(p_mapping);
	if (p_update_existing) {
		Vector<String> entry = p_mapping.split(",");
		String uid = entry[0];
		for (int i = 0; i < joy_names.size(); i++) {
			if (uid == joy_names[i].uid) {
				joy_names[i].mapping = map_db.size() - 1;
			}
		}
	}
}

void Input::remove_joy_mapping(String p_guid) {
	for (int i = map_db.size() - 1; i >= 0; i--) {
		if (p_guid == map_db[i].uid) {
			map_db.remove(i);
		}
	}
	for (int i = 0; i < joy_names.size(); i++) {
		if (joy_names[i].uid == p_guid) {
			joy_names[i].mapping = -1;
		}
	}
}

void Input::set_fallback_mapping(String p_guid) {
	for (int i = 0; i < map_db.size(); i++) {
		if (map_db[i].uid == p_guid) {
			fallback_mapping = i;
			return;
		}
	}
}

//platforms that use the remapping system can override and call to these ones
bool Input::is_joy_known(int p_device) {
	int mapping = joy_names[p_device].mapping;
	return mapping != -1 ? (mapping != fallback_mapping) : false;
}

String Input::get_joy_guid(int p_device) const {
	ERR_FAIL_COND_V(!joy_names.has(p_device), "");
	return joy_names[p_device].uid;
}

Array Input::get_connected_joypads() {
	Array ret;
	Map<int, Joypad>::Element *elem = joy_names.front();
	while (elem) {
		if (elem->get().connected) {
			ret.push_back(elem->key());
		}
		elem = elem->next();
	}
	return ret;
}

String Input::get_joy_button_string(int p_button) {
	ERR_FAIL_INDEX_V(p_button, JOY_BUTTON_MAX, "Invalid button");
	return _joy_button_names[p_button];
}

int Input::get_joy_button_index_from_string(String p_button) {
	for (int i = 0; i < JOY_BUTTON_MAX; i++) {
		if (p_button == _joy_button_names[i]) {
			return i;
		}
	}
	ERR_FAIL_V(JOY_INVALID_BUTTON);
}

int Input::get_unused_joy_id() {
	for (int i = 0; i < JOYPADS_MAX; i++) {
		if (!joy_names.has(i) || !joy_names[i].connected) {
			return i;
		}
	}
	return -1;
}

String Input::get_joy_axis_string(int p_axis) {
	ERR_FAIL_INDEX_V(p_axis, JOY_AXIS_MAX, "Invalid axis");
	return _joy_axis_names[p_axis];
}

int Input::get_joy_axis_index_from_string(String p_axis) {
	for (int i = 0; i < JOY_AXIS_MAX; i++) {
		if (p_axis == _joy_axis_names[i]) {
			return i;
		}
	}
	ERR_FAIL_V(JOY_INVALID_AXIS);
}

Input::Input() {
	singleton = this;

	// Parse default mappings.
	{
		int i = 0;
		while (DefaultControllerMappings::mappings[i]) {
			parse_mapping(DefaultControllerMappings::mappings[i++]);
		}
	}

	// If defined, parse SDL_GAMECONTROLLERCONFIG for possible new mappings/overrides.
	String env_mapping = OS::get_singleton()->get_environment("SDL_GAMECONTROLLERCONFIG");
	if (env_mapping != "") {
		Vector<String> entries = env_mapping.split("\n");
		for (int i = 0; i < entries.size(); i++) {
			if (entries[i] == "") {
				continue;
			}
			parse_mapping(entries[i]);
		}
	}
}

//////////////////////////////////////////////////////////