Revert of Gamepad API support for chrome on android

content/public/android/java/src/org/chromium/content/browser/input/GamepadList.java

Index: content/public/android/java/src/org/chromium/content/browser/input/GamepadList.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/GamepadList.java b/content/public/android/java/src/org/chromium/content/browser/input/GamepadList.java
deleted file mode 100644
index cad2b55dd389769057d934d9c8eb84fed5c787a5..0000000000000000000000000000000000000000
--- a/content/public/android/java/src/org/chromium/content/browser/input/GamepadList.java
+++ /dev/null
@@ -1,302 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.content.browser.input;
-
-import android.content.Context;
-import android.hardware.input.InputManager;
-import android.hardware.input.InputManager.InputDeviceListener;
-import android.view.InputDevice;
-import android.view.InputEvent;
-import android.view.KeyEvent;
-import android.view.MotionEvent;
-
-import org.chromium.base.CalledByNative;
-import org.chromium.base.JNINamespace;
-import org.chromium.base.ThreadUtils;
-
-/**
- * Class to manage connected gamepad devices list.
- *
- * It is a Java counterpart of GamepadPlatformDataFetcherAndroid and feeds Gamepad API with input
- * data.
- */
-@JNINamespace("content")
-public class GamepadList implements InputDeviceListener {
-    private static final int MAX_GAMEPADS = 4;
-
-    private final Object mLock = new Object();
-
-    private final GamepadDevice[] mGamepadDevices = new GamepadDevice[MAX_GAMEPADS];
-    private InputManager mInputManager;
-    private int mAttachedToWindowCounter;
-    private boolean mIsGamepadAccessed;
-
-    private GamepadList() {}
-
-    private void initializeDevices() {
-        // Get list of all the attached input devices.
-        int[] deviceIds = mInputManager.getInputDeviceIds();
-        for (int i = 0; i < deviceIds.length; i++) {
-            InputDevice inputDevice = InputDevice.getDevice(deviceIds[i]);
-            // Check for gamepad device
-            if (isGamepadDevice(inputDevice)) {
-                // Register a new gamepad device.
-                registerGamepad(inputDevice);
-            }
-        }
-    }
-
-    /**
-     * Notifies the GamepadList that a {@link ContentView} is attached to a window and it should
-     * prepare itself for gamepad input. It must be called before {@link onGenericMotionEvent} and
-     * {@link dispatchKeyEvent}.
-     */
-    public static void onAttachedToWindow(Context context) {
-        assert ThreadUtils.runningOnUiThread();
-        getInstance().attachedToWindow(context);
-    }
-
-    private void attachedToWindow(Context context) {
-        if (mAttachedToWindowCounter++ == 0) {
-            mInputManager = (InputManager) context.getSystemService(Context.INPUT_SERVICE);
-            synchronized (mLock) {
-                initializeDevices();
-            }
-            // Register an input device listener.
-            mInputManager.registerInputDeviceListener(this, null);
-        }
-    }
-
-    /**
-     * Notifies the GamepadList that a {@link ContentView} is detached from it's window.
-     */
-    public static void onDetachedFromWindow() {
-        assert ThreadUtils.runningOnUiThread();
-        getInstance().detachedFromWindow();
-    }
-
-    private void detachedFromWindow() {
-        if (--mAttachedToWindowCounter == 0) {
-            synchronized (mLock) {
-                for (int i = 0; i < MAX_GAMEPADS; ++i) {
-                    mGamepadDevices[i] = null;
-                }
-            }
-            mInputManager.unregisterInputDeviceListener(this);
-            mInputManager = null;
-        }
-    }
-
-    // ------------------------------------------------------------
-
-    // Override InputDeviceListener methods
-    @Override
-    public void onInputDeviceChanged(int deviceId) {
-    }
-
-    @Override
-    public void onInputDeviceRemoved(int deviceId) {
-        synchronized (mLock) {
-            unregisterGamepad(deviceId);
-        }
-    }
-
-    @Override
-    public void onInputDeviceAdded(int deviceId) {
-        InputDevice inputDevice = InputDevice.getDevice(deviceId);
-        if (!isGamepadDevice(inputDevice)) return;
-        synchronized (mLock) {
-            registerGamepad(inputDevice);
-        }
-    }
-
-    // ------------------------------------------------------------
-
-    private static GamepadList getInstance() {
-        return LazyHolder.INSTANCE;
-    }
-
-    private int getDeviceCount() {
-        int count = 0;
-        for (int i = 0; i < MAX_GAMEPADS; i++) {
-            if (getDevice(i) != null) {
-                count++;
-            }
-        }
-        return count;
-    }
-
-    private boolean isDeviceConnected(int index) {
-        if (index < MAX_GAMEPADS && getDevice(index) != null) {
-            return true;
-        }
-        return false;
-    }
-
-    private GamepadDevice getDeviceById(int deviceId) {
-        for (int i = 0; i < MAX_GAMEPADS; i++) {
-            GamepadDevice gamepad = mGamepadDevices[i];
-            if (gamepad != null && gamepad.getId() == deviceId) {
-                return gamepad;
-            }
-        }
-        return null;
-    }
-
-    private GamepadDevice getDevice(int index) {
-        // Maximum 4 Gamepads can be connected at a time starting at index zero.
-        assert index >= 0 && index < MAX_GAMEPADS;
-        return mGamepadDevices[index];
-    }
-
-    /**
-     * Handles key events from the gamepad devices.
-     * @return True if the event has been consumed.
-     */
-    public static boolean dispatchKeyEvent(KeyEvent event) {
-        if (!isGamepadEvent(event)) return false;
-        return getInstance().handleKeyEvent(event);
-    }
-
-    private boolean handleKeyEvent(KeyEvent event) {
-        synchronized (mLock) {
-            if (!mIsGamepadAccessed) return false;
-            GamepadDevice gamepad = getGamepadForEvent(event);
-            if (gamepad == null) return false;
-            return gamepad.handleKeyEvent(event);
-        }
-    }
-
-    /**
-     * Handles motion events from the gamepad devices.
-     * @return True if the event has been consumed.
-     */
-    public static boolean onGenericMotionEvent(MotionEvent event) {
-        if (!isGamepadEvent(event)) return false;
-        return getInstance().handleMotionEvent(event);
-    }
-
-    private boolean handleMotionEvent(MotionEvent event) {
-        synchronized (mLock) {
-            if (!mIsGamepadAccessed) return false;
-            GamepadDevice gamepad = getGamepadForEvent(event);
-            if (gamepad == null) return false;
-            return gamepad.handleMotionEvent(event);
-        }
-    }
-
-    private int getNextAvailableIndex() {
-        // When multiple gamepads are connected to a user agent, indices must be assigned on a
-        // first-come first-serve basis, starting at zero. If a gamepad is disconnected, previously
-        // assigned indices must not be reassigned to gamepads that continue to be connected.
-        // However, if a gamepad is disconnected, and subsequently the same or a different
-        // gamepad is then connected, index entries must be reused.
-
-        for (int i = 0; i < MAX_GAMEPADS; ++i) {
-            if (getDevice(i) == null) {
-                return i;
-            }
-        }
-        // Reached maximum gamepads limit.
-        return -1;
-    }
-
-    private boolean registerGamepad(InputDevice inputDevice) {
-        int index = getNextAvailableIndex();
-        if (index == -1) return false; // invalid index
-
-        GamepadDevice gamepad = new GamepadDevice(index, inputDevice);
-        mGamepadDevices[index] = gamepad;
-        return true;
-    }
-
-    private void unregisterGamepad(int deviceId) {
-        GamepadDevice gamepadDevice = getDeviceById(deviceId);
-        if (gamepadDevice == null) return; // Not a registered device.
-        int index = gamepadDevice.getIndex();
-        mGamepadDevices[index] = null;
-    }
-
-    private static boolean isGamepadDevice(InputDevice inputDevice) {
-        return ((inputDevice.getSources() & InputDevice.SOURCE_JOYSTICK) ==
-                InputDevice.SOURCE_JOYSTICK);
-    }
-
-    private GamepadDevice getGamepadForEvent(InputEvent event) {
-        return getDeviceById(event.getDeviceId());
-    }
-
-    /**
-     * @return True if the motion event corresponds to a gamepad event.
-     */
-    public static boolean isGamepadEvent(MotionEvent event) {
-        return ((event.getSource() & InputDevice.SOURCE_JOYSTICK) == InputDevice.SOURCE_JOYSTICK);
-    }
-
-    /**
-     * @return True if event's keycode corresponds to a gamepad key.
-     */
-    public static boolean isGamepadEvent(KeyEvent event) {
-        int keyCode = event.getKeyCode();
-        switch (keyCode) {
-        // Specific handling for dpad keys is required because
-        // KeyEvent.isGamepadButton doesn't consider dpad keys.
-            case KeyEvent.KEYCODE_DPAD_UP:
-            case KeyEvent.KEYCODE_DPAD_DOWN:
-            case KeyEvent.KEYCODE_DPAD_LEFT:
-            case KeyEvent.KEYCODE_DPAD_RIGHT:
-                return true;
-            default:
-                return KeyEvent.isGamepadButton(keyCode);
-        }
-    }
-
-    @CalledByNative
-    static void updateGamepadData(long webGamepadsPtr) {
-        getInstance().grabGamepadData(webGamepadsPtr);
-    }
-
-    private void grabGamepadData(long webGamepadsPtr) {
-        synchronized (mLock) {
-            for (int i = 0; i < MAX_GAMEPADS; i++) {
-                final GamepadDevice device = getDevice(i);
-                if (device != null) {
-                    device.updateButtonsAndAxesMapping();
-                    nativeSetGamepadData(webGamepadsPtr, i, device.isStandardGamepad(), true,
-                            device.getName(), device.getTimestamp(), device.getAxes(),
-                            device.getButtons());
-                } else {
-                    nativeSetGamepadData(webGamepadsPtr, i, false, false, null, 0, null, null);
-                }
-            }
-        }
-    }
-
-    @CalledByNative
-    static void notifyForGamepadsAccess(boolean isAccessPaused) {
-        getInstance().setIsGamepadAccessed(!isAccessPaused);
-    }
-
-    private void setIsGamepadAccessed(boolean isGamepadAccessed) {
-        synchronized (mLock) {
-            mIsGamepadAccessed = isGamepadAccessed;
-            if (isGamepadAccessed) {
-                for (int i = 0; i < MAX_GAMEPADS; i++) {
-                    GamepadDevice gamepadDevice = getDevice(i);
-                    if (gamepadDevice == null) continue;
-                    gamepadDevice.clearData();
-                }
-            }
-        }
-    }
-
-    private native void nativeSetGamepadData(long webGamepadsPtr, int index, boolean mapping,
-            boolean connected, String devicename, long timestamp, float[] axes, float[] buttons);
-
-    private static class LazyHolder {
-        private static final GamepadList INSTANCE = new GamepadList();
-    }
-
-}