mirror of
https://github.com/mozilla/gecko-dev.git
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392 lines
14 KiB
Java
392 lines
14 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Timer;
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import java.util.TimerTask;
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import org.mozilla.gecko.AppConstants.Versions;
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import org.mozilla.gecko.util.GamepadUtils;
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import org.mozilla.gecko.util.ThreadUtils;
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import android.content.Context;
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import android.hardware.input.InputManager;
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import android.view.InputDevice;
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import android.view.KeyEvent;
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import android.view.MotionEvent;
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public class AndroidGamepadManager {
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// This is completely arbitrary.
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private static final float TRIGGER_PRESSED_THRESHOLD = 0.25f;
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private static final long POLL_TIMER_PERIOD = 1000; // milliseconds
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private static enum Axis {
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X(MotionEvent.AXIS_X),
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Y(MotionEvent.AXIS_Y),
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Z(MotionEvent.AXIS_Z),
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RZ(MotionEvent.AXIS_RZ);
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public final int axis;
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private Axis(int axis) {
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this.axis = axis;
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}
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}
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// A list of gamepad button mappings. Axes are determined at
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// runtime, as they vary by Android version.
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private static enum Trigger {
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Left(6),
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Right(7);
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public final int button;
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private Trigger(int button) {
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this.button = button;
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}
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}
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private static final int FIRST_DPAD_BUTTON = 12;
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// A list of axis number, gamepad button mappings for negative, positive.
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// Button mappings are added to FIRST_DPAD_BUTTON.
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private static enum DpadAxis {
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UpDown(MotionEvent.AXIS_HAT_Y, 0, 1),
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LeftRight(MotionEvent.AXIS_HAT_X, 2, 3);
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public final int axis;
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public final int negativeButton;
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public final int positiveButton;
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private DpadAxis(int axis, int negativeButton, int positiveButton) {
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this.axis = axis;
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this.negativeButton = negativeButton;
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this.positiveButton = positiveButton;
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}
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}
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private static enum Button {
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A(KeyEvent.KEYCODE_BUTTON_A),
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B(KeyEvent.KEYCODE_BUTTON_B),
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X(KeyEvent.KEYCODE_BUTTON_X),
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Y(KeyEvent.KEYCODE_BUTTON_Y),
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L1(KeyEvent.KEYCODE_BUTTON_L1),
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R1(KeyEvent.KEYCODE_BUTTON_R1),
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L2(KeyEvent.KEYCODE_BUTTON_L2),
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R2(KeyEvent.KEYCODE_BUTTON_R2),
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SELECT(KeyEvent.KEYCODE_BUTTON_SELECT),
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START(KeyEvent.KEYCODE_BUTTON_START),
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THUMBL(KeyEvent.KEYCODE_BUTTON_THUMBL),
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THUMBR(KeyEvent.KEYCODE_BUTTON_THUMBR),
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DPAD_UP(KeyEvent.KEYCODE_DPAD_UP),
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DPAD_DOWN(KeyEvent.KEYCODE_DPAD_DOWN),
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DPAD_LEFT(KeyEvent.KEYCODE_DPAD_LEFT),
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DPAD_RIGHT(KeyEvent.KEYCODE_DPAD_RIGHT);
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public final int button;
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private Button(int button) {
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this.button = button;
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}
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}
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private static class Gamepad {
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// ID from GamepadService
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public int id;
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// Retain axis state so we can determine changes.
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public float axes[];
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public boolean dpad[];
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public int triggerAxes[];
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public float triggers[];
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public Gamepad(int serviceId, int deviceId) {
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id = serviceId;
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axes = new float[Axis.values().length];
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dpad = new boolean[4];
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triggers = new float[2];
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InputDevice device = InputDevice.getDevice(deviceId);
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if (device != null) {
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// LTRIGGER/RTRIGGER don't seem to be exposed on older
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// versions of Android.
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if (device.getMotionRange(MotionEvent.AXIS_LTRIGGER) != null && device.getMotionRange(MotionEvent.AXIS_RTRIGGER) != null) {
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triggerAxes = new int[]{MotionEvent.AXIS_LTRIGGER,
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MotionEvent.AXIS_RTRIGGER};
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} else if (device.getMotionRange(MotionEvent.AXIS_BRAKE) != null && device.getMotionRange(MotionEvent.AXIS_GAS) != null) {
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triggerAxes = new int[]{MotionEvent.AXIS_BRAKE,
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MotionEvent.AXIS_GAS};
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} else {
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triggerAxes = null;
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}
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}
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}
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}
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private static boolean sStarted;
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private static HashMap<Integer, Gamepad> sGamepads;
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private static HashMap<Integer, List<KeyEvent>> sPendingGamepads;
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private static InputManager.InputDeviceListener sListener;
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private static Timer sPollTimer;
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private AndroidGamepadManager() {
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}
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public static void startup() {
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ThreadUtils.assertOnUiThread();
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if (!sStarted) {
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sGamepads = new HashMap<Integer, Gamepad>();
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sPendingGamepads = new HashMap<Integer, List<KeyEvent>>();
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scanForGamepads();
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addDeviceListener();
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sStarted = true;
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}
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}
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public static void shutdown() {
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ThreadUtils.assertOnUiThread();
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if (sStarted) {
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removeDeviceListener();
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sPendingGamepads = null;
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sGamepads = null;
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sStarted = false;
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}
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}
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public static void gamepadAdded(int deviceId, int serviceId) {
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ThreadUtils.assertOnUiThread();
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if (!sStarted) {
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return;
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}
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if (!sPendingGamepads.containsKey(deviceId)) {
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removeGamepad(deviceId);
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return;
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}
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List<KeyEvent> pending = sPendingGamepads.get(deviceId);
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sPendingGamepads.remove(deviceId);
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sGamepads.put(deviceId, new Gamepad(serviceId, deviceId));
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// Handle queued KeyEvents
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for (KeyEvent ev : pending) {
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handleKeyEvent(ev);
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}
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}
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private static float deadZone(MotionEvent ev, int axis) {
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if (GamepadUtils.isValueInDeadZone(ev, axis)) {
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return 0.0f;
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}
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return ev.getAxisValue(axis);
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}
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private static void mapDpadAxis(Gamepad gamepad,
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boolean pressed,
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float value,
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int which) {
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if (pressed != gamepad.dpad[which]) {
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gamepad.dpad[which] = pressed;
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GeckoAppShell.sendEventToGecko(GeckoEvent.createGamepadButtonEvent(gamepad.id, FIRST_DPAD_BUTTON + which, pressed, Math.abs(value)));
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}
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}
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public static boolean handleMotionEvent(MotionEvent ev) {
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ThreadUtils.assertOnUiThread();
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if (!sStarted) {
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return false;
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}
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if (!sGamepads.containsKey(ev.getDeviceId())) {
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// Not a device we care about.
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return false;
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}
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Gamepad gamepad = sGamepads.get(ev.getDeviceId());
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// First check the analog stick axes
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boolean[] valid = new boolean[Axis.values().length];
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float[] axes = new float[Axis.values().length];
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boolean anyValidAxes = false;
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for (Axis axis : Axis.values()) {
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float value = deadZone(ev, axis.axis);
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int i = axis.ordinal();
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if (value != gamepad.axes[i]) {
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axes[i] = value;
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gamepad.axes[i] = value;
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valid[i] = true;
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anyValidAxes = true;
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}
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}
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if (anyValidAxes) {
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// Send an axismove event.
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GeckoAppShell.sendEventToGecko(GeckoEvent.createGamepadAxisEvent(gamepad.id, valid, axes));
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}
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// Map triggers to buttons.
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if (gamepad.triggerAxes != null) {
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for (Trigger trigger : Trigger.values()) {
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int i = trigger.ordinal();
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int axis = gamepad.triggerAxes[i];
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float value = deadZone(ev, axis);
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if (value != gamepad.triggers[i]) {
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gamepad.triggers[i] = value;
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boolean pressed = value > TRIGGER_PRESSED_THRESHOLD;
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GeckoAppShell.sendEventToGecko(GeckoEvent.createGamepadButtonEvent(gamepad.id, trigger.button, pressed, value));
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}
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}
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}
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// Map d-pad to buttons.
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for (DpadAxis dpadaxis : DpadAxis.values()) {
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float value = deadZone(ev, dpadaxis.axis);
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mapDpadAxis(gamepad, value < 0.0f, value, dpadaxis.negativeButton);
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mapDpadAxis(gamepad, value > 0.0f, value, dpadaxis.positiveButton);
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}
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return true;
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}
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public static boolean handleKeyEvent(KeyEvent ev) {
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ThreadUtils.assertOnUiThread();
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if (!sStarted) {
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return false;
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}
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int deviceId = ev.getDeviceId();
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if (sPendingGamepads.containsKey(deviceId)) {
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// Queue up key events for pending devices.
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sPendingGamepads.get(deviceId).add(ev);
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return true;
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}
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if (!sGamepads.containsKey(deviceId)) {
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InputDevice device = ev.getDevice();
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if (device != null &&
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(device.getSources() & InputDevice.SOURCE_GAMEPAD) == InputDevice.SOURCE_GAMEPAD) {
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// This is a gamepad we haven't seen yet.
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addGamepad(device);
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sPendingGamepads.get(deviceId).add(ev);
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return true;
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}
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// Not a device we care about.
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return false;
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}
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int key = -1;
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for (Button button : Button.values()) {
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if (button.button == ev.getKeyCode()) {
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key = button.ordinal();
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break;
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}
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}
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if (key == -1) {
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// Not a key we know how to handle.
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return false;
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}
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if (ev.getRepeatCount() > 0) {
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// We would handle this key, but we're not interested in
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// repeats. Eat it.
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return true;
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}
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Gamepad gamepad = sGamepads.get(deviceId);
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boolean pressed = ev.getAction() == KeyEvent.ACTION_DOWN;
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GeckoAppShell.sendEventToGecko(GeckoEvent.createGamepadButtonEvent(gamepad.id, key, pressed, pressed ? 1.0f : 0.0f));
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return true;
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}
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private static void scanForGamepads() {
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int[] deviceIds = InputDevice.getDeviceIds();
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if (deviceIds == null) {
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return;
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}
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for (int i=0; i < deviceIds.length; i++) {
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InputDevice device = InputDevice.getDevice(deviceIds[i]);
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if (device == null) {
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continue;
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}
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if ((device.getSources() & InputDevice.SOURCE_GAMEPAD) != InputDevice.SOURCE_GAMEPAD) {
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continue;
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}
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addGamepad(device);
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}
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}
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private static void addGamepad(InputDevice device) {
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//TODO: when we're using a newer SDK version, use these.
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//if (Build.VERSION.SDK_INT >= 12) {
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//int vid = device.getVendorId();
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//int pid = device.getProductId();
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//}
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sPendingGamepads.put(device.getId(), new ArrayList<KeyEvent>());
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GeckoAppShell.sendEventToGecko(GeckoEvent.createGamepadAddRemoveEvent(device.getId(), true));
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}
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private static void removeGamepad(int deviceId) {
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Gamepad gamepad = sGamepads.get(deviceId);
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GeckoAppShell.sendEventToGecko(GeckoEvent.createGamepadAddRemoveEvent(gamepad.id, false));
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sGamepads.remove(deviceId);
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}
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private static void addDeviceListener() {
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if (Versions.preJB) {
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// Poll known gamepads to see if they've disappeared.
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sPollTimer = new Timer();
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sPollTimer.scheduleAtFixedRate(new TimerTask() {
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@Override
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public void run() {
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for (Integer deviceId : sGamepads.keySet()) {
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if (InputDevice.getDevice(deviceId) == null) {
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removeGamepad(deviceId);
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}
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}
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}
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}, POLL_TIMER_PERIOD, POLL_TIMER_PERIOD);
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return;
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}
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sListener = new InputManager.InputDeviceListener() {
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@Override
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public void onInputDeviceAdded(int deviceId) {
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InputDevice device = InputDevice.getDevice(deviceId);
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if (device == null) {
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return;
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}
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if ((device.getSources() & InputDevice.SOURCE_GAMEPAD) == InputDevice.SOURCE_GAMEPAD) {
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addGamepad(device);
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}
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}
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@Override
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public void onInputDeviceRemoved(int deviceId) {
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if (sPendingGamepads.containsKey(deviceId)) {
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// Got removed before Gecko's ack reached us.
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// gamepadAdded will deal with it.
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sPendingGamepads.remove(deviceId);
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return;
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}
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if (sGamepads.containsKey(deviceId)) {
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removeGamepad(deviceId);
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}
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}
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@Override
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public void onInputDeviceChanged(int deviceId) {
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}
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};
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((InputManager)GeckoAppShell.getContext().getSystemService(Context.INPUT_SERVICE)).registerInputDeviceListener(sListener, ThreadUtils.getUiHandler());
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}
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private static void removeDeviceListener() {
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if (Versions.preJB) {
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if (sPollTimer != null) {
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sPollTimer.cancel();
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sPollTimer = null;
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}
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return;
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}
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((InputManager)GeckoAppShell.getContext().getSystemService(Context.INPUT_SERVICE)).unregisterInputDeviceListener(sListener);
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sListener = null;
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}
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}
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