Merge "Followup TBR in I87060049" into gingerbread

abstract class KeyDetector {

    protected Keyboard mKeyboard;

    private Key[] mKeys;

    protected int mCorrectionX;

    protected int mCorrectionY;

    protected boolean mProximityCorrectOn;

    protected int mProximityThresholdSquare;

    public Key[] setKeyboard(Keyboard keyboard, float correctionX, float correctionY) {

    protected Key[] getKeys() {

        if (mKeys == null)

            throw new IllegalStateException("keyboard isn't set");

        // mKeyboard is guaranteed not null at setKeybaord() method

        // mKeyboard is guaranteed not to be null at setKeybaord() method if mKeys is not null

        return mKeys;

    }

        mProximityThresholdSquare = threshold * threshold;

    }

    /**

     * Allocates array that can hold all key indices returned by {@link #getKeyIndexAndNearbyCodes}

     * method. The maximum size of the array should be computed by {@link #getMaxNearbyKeys}.

     *

     * @return Allocates and returns an array that can hold all key indices returned by

     *         {@link #getKeyIndexAndNearbyCodes} method. All elements in the returned array are

     *         initialized by {@link com.android.inputmethod.latin.LatinKeyboardView.NOT_A_KEY}

     *         value.

     */

    public int[] newCodeArray() {

        int[] codes = new int[getMaxNearbyKeys()];

        Arrays.fill(codes, LatinKeyboardBaseView.NOT_A_KEY);

        return codes;

    }

    /**

     * Computes maximum size of the array that can contain all nearby key indices returned by

     * {@link #getKeyIndexAndNearbyCodes}.

     *

     * @return Returns maximum size of the array that can contain all nearby key indices returned

     *         by {@link #getKeyIndexAndNearbyCodes}.

     */

    abstract protected int getMaxNearbyKeys();

    /**

     * Finds all possible nearby key indices around a touch event point and returns the nearest key

     * index. The algorithm to determine the nearby keys depends on the threshold set by

     * {@link #setProximityThreshold(int)} and the mode set by

     * {@link #setProximityCorrectionEnabled(boolean)}.

     *

     * @param x The x-coordinate of a touch point

     * @param y The y-coordinate of a touch point

     * @param allKeys All nearby key indices are returned in this array

     * @return The nearest key index

     */

    abstract public int getKeyIndexAndNearbyCodes(int x, int y, int[] allKeys);

}