michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.util;
michael@0: 
michael@0: import android.os.Build;
michael@0: import android.view.InputDevice;
michael@0: import android.view.KeyCharacterMap;
michael@0: import android.view.KeyEvent;
michael@0: import android.view.MotionEvent;
michael@0: import android.view.View;
michael@0: import android.widget.AdapterView;
michael@0: import android.widget.ListView;
michael@0: 
michael@0: public final class GamepadUtils {
michael@0:     private static final int SONY_XPERIA_GAMEPAD_DEVICE_ID = 196611;
michael@0: 
michael@0:     private static View.OnKeyListener sClickDispatcher;
michael@0:     private static float sDeadZoneThresholdOverride = 1e-2f;
michael@0: 
michael@0:     private GamepadUtils() {
michael@0:     }
michael@0: 
michael@0:     private static boolean isGamepadKey(KeyEvent event) {
michael@0:         if (Build.VERSION.SDK_INT >= 9) {
michael@0:             return (event.getSource() & InputDevice.SOURCE_GAMEPAD) == InputDevice.SOURCE_GAMEPAD;
michael@0:         }
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     public static boolean isActionKey(KeyEvent event) {
michael@0:         return (isGamepadKey(event) && (event.getKeyCode() == KeyEvent.KEYCODE_BUTTON_A));
michael@0:     }
michael@0: 
michael@0:     public static boolean isActionKeyDown(KeyEvent event) {
michael@0:         return isActionKey(event) && event.getAction() == KeyEvent.ACTION_DOWN;
michael@0:     }
michael@0: 
michael@0:     public static boolean isBackKey(KeyEvent event) {
michael@0:         return (isGamepadKey(event) && (event.getKeyCode() == KeyEvent.KEYCODE_BUTTON_B));
michael@0:     }
michael@0: 
michael@0:     public static void overrideDeadZoneThreshold(float threshold) {
michael@0:         sDeadZoneThresholdOverride = threshold;
michael@0:     }
michael@0: 
michael@0:     public static boolean isValueInDeadZone(MotionEvent event, int axis) {
michael@0:         if (Build.VERSION.SDK_INT < 9) {
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         float threshold;
michael@0:         if (sDeadZoneThresholdOverride >= 0) {
michael@0:             threshold = sDeadZoneThresholdOverride;
michael@0:         } else {
michael@0:             InputDevice.MotionRange range = event.getDevice().getMotionRange(axis);
michael@0:             threshold = range.getFlat() + range.getFuzz();
michael@0:         }
michael@0:         float value = event.getAxisValue(axis);
michael@0:         return (Math.abs(value) < threshold);
michael@0:     }
michael@0: 
michael@0:     public static boolean isPanningControl(MotionEvent event) {
michael@0:         if (Build.VERSION.SDK_INT < 12) {
michael@0:             return false;
michael@0:         }
michael@0:         if ((event.getSource() & InputDevice.SOURCE_CLASS_MASK) != InputDevice.SOURCE_CLASS_JOYSTICK) {
michael@0:             return false;
michael@0:         }
michael@0:         if (isValueInDeadZone(event, MotionEvent.AXIS_X)
michael@0:                 && isValueInDeadZone(event, MotionEvent.AXIS_Y)
michael@0:                 && isValueInDeadZone(event, MotionEvent.AXIS_Z)
michael@0:                 && isValueInDeadZone(event, MotionEvent.AXIS_RZ)) {
michael@0:             return false;
michael@0:         }
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     public static View.OnKeyListener getClickDispatcher() {
michael@0:         if (sClickDispatcher == null) {
michael@0:             sClickDispatcher = new View.OnKeyListener() {
michael@0:                 @Override
michael@0:                 public boolean onKey(View v, int keyCode, KeyEvent event) {
michael@0:                     if (isActionKeyDown(event)) {
michael@0:                         return v.performClick();
michael@0:                     }
michael@0:                     return false;
michael@0:                 }
michael@0:             };
michael@0:         }
michael@0:         return sClickDispatcher;
michael@0:     }
michael@0: 
michael@0:     public static KeyEvent translateSonyXperiaGamepadKeys(int keyCode, KeyEvent event) {
michael@0:         // The cross and circle button mappings may be swapped in the different regions so
michael@0:         // determine if they are swapped so the proper key codes can be mapped to the keys
michael@0:         boolean areKeysSwapped = areSonyXperiaGamepadKeysSwapped();
michael@0: 
michael@0:         // If a Sony Xperia, remap the cross and circle buttons to buttons
michael@0:         // A and B for the gamepad API
michael@0:         switch (keyCode) {
michael@0:             case KeyEvent.KEYCODE_BACK:
michael@0:                 keyCode = (areKeysSwapped ? KeyEvent.KEYCODE_BUTTON_A : KeyEvent.KEYCODE_BUTTON_B);
michael@0:                 break;
michael@0: 
michael@0:             case KeyEvent.KEYCODE_DPAD_CENTER:
michael@0:                 keyCode = (areKeysSwapped ? KeyEvent.KEYCODE_BUTTON_B : KeyEvent.KEYCODE_BUTTON_A);
michael@0:                 break;
michael@0: 
michael@0:             default:
michael@0:                 return event;
michael@0:         }
michael@0: 
michael@0:         return new KeyEvent(event.getAction(), keyCode);
michael@0:     }
michael@0: 
michael@0:     public static boolean isSonyXperiaGamepadKeyEvent(KeyEvent event) {
michael@0:         return (event.getDeviceId() == SONY_XPERIA_GAMEPAD_DEVICE_ID &&
michael@0:                 "Sony Ericsson".equals(Build.MANUFACTURER) &&
michael@0:                 ("R800".equals(Build.MODEL) || "R800i".equals(Build.MODEL)));
michael@0:     }
michael@0: 
michael@0:     private static boolean areSonyXperiaGamepadKeysSwapped() {
michael@0:         // The cross and circle buttons on Sony Xperia phones are swapped
michael@0:         // in different regions
michael@0:         // http://developer.sonymobile.com/2011/02/13/xperia-play-game-keys/
michael@0:         final char DEFAULT_O_BUTTON_LABEL = 0x25CB;
michael@0: 
michael@0:         boolean swapped = false;
michael@0:         int[] deviceIds = InputDevice.getDeviceIds();
michael@0: 
michael@0:         for (int i= 0; deviceIds != null && i < deviceIds.length; i++) {
michael@0:             KeyCharacterMap keyCharacterMap = KeyCharacterMap.load(deviceIds[i]);
michael@0:             if (keyCharacterMap != null && DEFAULT_O_BUTTON_LABEL ==
michael@0:                 keyCharacterMap.getDisplayLabel(KeyEvent.KEYCODE_DPAD_CENTER)) {
michael@0:                 swapped = true;
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:         return swapped;
michael@0:     }
michael@0: }