Migrating majority of gamepad from content/browser/ to device/

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

-// 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.os.SystemClock;
-import android.view.InputDevice;
-import android.view.InputDevice.MotionRange;
-import android.view.KeyEvent;
-import android.view.MotionEvent;
-
-import org.chromium.base.VisibleForTesting;
-
-import java.util.Arrays;
-import java.util.List;
-
-/**
- * Manages information related to each connected gamepad device.
- */
-class GamepadDevice {
-    // Axis ids are used as indices which are empirically always smaller than 256 so this allows
-    // us to create cheap associative arrays.
-    @VisibleForTesting
-    static final int MAX_RAW_AXIS_VALUES = 256;
-
-    // Keycodes are used as indices which are empirically always smaller than 256 so this allows
-    // us to create cheap associative arrays.
-    @VisibleForTesting
-    static final int MAX_RAW_BUTTON_VALUES = 256;
-
-    // An id for the gamepad.
-    private int mDeviceId;
-    // The index of the gamepad in the Navigator.
-    private int mDeviceIndex;
-    // Last time the data for this gamepad was updated.
-    private long mTimestamp;
-    // If this gamepad is mapped to standard gamepad?
-    private boolean mIsStandardGamepad;
-
-    // Array of values for all axes of the gamepad.
-    // All axis values must be linearly normalized to the range [-1.0 .. 1.0].
-    // As appropriate, -1.0 should correspond to "up" or "left", and 1.0
-    // should correspond to "down" or "right".
-    private final float[] mAxisValues = new float[CanonicalAxisIndex.COUNT];
-
-    private final float[] mButtonsValues = new float[CanonicalButtonIndex.COUNT];
-
-    // When the user agent recognizes the attached inputDevice, it is recommended
-    // that it be remapped to a canonical ordering when possible. Devices that are
-    // not recognized should still be exposed in their raw form. Therefore we must
-    // pass the raw Button and raw Axis values.
-    private final float[] mRawButtons = new float[MAX_RAW_BUTTON_VALUES];
-    private final float[] mRawAxes = new float[MAX_RAW_AXIS_VALUES];
-
-    // An identification string for the gamepad.
-    private String mDeviceName;
-
-    // Array of axes ids.
-    private int[] mAxes;
-
-    GamepadDevice(int index, InputDevice inputDevice) {
-        mDeviceIndex = index;
-        mDeviceId = inputDevice.getId();
-        mDeviceName = inputDevice.getName();
-        mTimestamp = SystemClock.uptimeMillis();
-        // Get axis ids and initialize axes values.
-        final List<MotionRange> ranges = inputDevice.getMotionRanges();
-        mAxes = new int[ranges.size()];
-        int i = 0;
-        for (MotionRange range : ranges) {
-            if ((range.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {
-                int axis = range.getAxis();
-                assert axis < MAX_RAW_AXIS_VALUES;
-                mAxes[i++] = axis;
-            }
-        }
-    }
-
-    /**
-     * Updates the axes and buttons maping of a gamepad device to a standard gamepad format.
-     */
-    public void updateButtonsAndAxesMapping() {
-        mIsStandardGamepad = GamepadMappings.mapToStandardGamepad(
-                mAxisValues, mButtonsValues, mRawAxes, mRawButtons, mDeviceName);
-    }
-
-    /**
-     * @return Device Id of the gamepad device.
-     */
-    public int getId() {
-        return mDeviceId;
-    }
-
-    /**
-     * @return Mapping status of the gamepad device.
-     */
-    public boolean isStandardGamepad() {
-        return mIsStandardGamepad;
-    }
-
-    /**
-     * @return Device name of the gamepad device.
-     */
-    public String getName() {
-        return mDeviceName;
-    }
-
-    /**
-     * @return Device index of the gamepad device.
-     */
-    public int getIndex() {
-        return mDeviceIndex;
-    }
-
-    /**
-     * @return The timestamp when the gamepad device was last interacted.
-     */
-    public long getTimestamp() {
-        return mTimestamp;
-    }
-
-    /**
-     * @return The axes state of the gamepad device.
-     */
-    public float[] getAxes() {
-        return mAxisValues;
-    }
-
-    /**
-     * @return The buttons state of the gamepad device.
-     */
-    public float[] getButtons() {
-        return mButtonsValues;
-    }
-
-    /**
-     * Reset the axes and buttons data of the gamepad device everytime gamepad data access is
-     * paused.
-     */
-    public void clearData() {
-        Arrays.fill(mAxisValues, 0);
-        Arrays.fill(mRawAxes, 0);
-        Arrays.fill(mButtonsValues, 0);
-        Arrays.fill(mRawButtons, 0);
-    }
-
-    /**
-     * Handles key event from the gamepad device.
-     * @return True if the key event from the gamepad device has been consumed.
-     */
-    public boolean handleKeyEvent(KeyEvent event) {
-        // Ignore event if it is not for standard gamepad key.
-        if (!GamepadList.isGamepadEvent(event)) return false;
-        int keyCode = event.getKeyCode();
-        assert keyCode < MAX_RAW_BUTTON_VALUES;
-        // Button value 0.0 must mean fully unpressed, and 1.0 must mean fully pressed.
-        if (event.getAction() == KeyEvent.ACTION_DOWN) {
-            mRawButtons[keyCode] = 1.0f;
-        } else if (event.getAction() == KeyEvent.ACTION_UP) {
-            mRawButtons[keyCode] = 0.0f;
-        }
-        mTimestamp = event.getEventTime();
-
-        return true;
-    }
-
-    /**
-     * Handles motion event from the gamepad device.
-     * @return True if the motion event from the gamepad device has been consumed.
-     */
-    public boolean handleMotionEvent(MotionEvent event) {
-        // Ignore event if it is not a standard gamepad motion event.
-        if (!GamepadList.isGamepadEvent(event)) return false;
-        // Update axes values.
-        for (int i = 0; i < mAxes.length; i++) {
-            int axis = mAxes[i];
-            mRawAxes[axis] = event.getAxisValue(axis);
-        }
-        mTimestamp = event.getEventTime();
-        return true;
-    }
-}