Merge "Fix NPE when registering gesture support"

package com.android.systemui.statusbar.car;

import android.content.Context;

import android.graphics.Canvas;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.View;

import android.widget.LinearLayout;

import com.android.systemui.R;

import com.android.systemui.plugins.statusbar.phone.NavGesture;

import com.android.systemui.statusbar.phone.NavigationBarGestureHelper;

import com.android.systemui.statusbar.phone.NavigationBarView;

/**

        // Calling setNavigationIconHints in the base class will result in a NPE as the car

        // navigation bar does not have a back button.

    }

    @Override

    public void onPluginConnected(NavGesture plugin, Context context) {

        // set to null version of the plugin ignoring incoming arg.

        super.onPluginConnected(new NullNavGesture(), context);

    }

    @Override

    public void onPluginDisconnected(NavGesture plugin) {

        // reinstall the null nav gesture plugin

        super.onPluginConnected(new NullNavGesture(), getContext());

    }

    /**

     * Null object pattern to work around expectations of the base class.

     * This is a temporary solution to have the car system ui working.

     * Already underway is a refactor of they car sys ui as to not use this class

     * hierarchy.

     */

    private static class NullNavGesture implements NavGesture {

        @Override

        public GestureHelper getGestureHelper() {

            return new GestureHelper() {

                @Override

                public boolean onTouchEvent(MotionEvent event) {

                    return false;

                }

                @Override

                public boolean onInterceptTouchEvent(MotionEvent event) {

                    return false;

                }

                @Override

                public void setBarState(boolean vertical, boolean isRtl) {

                }

                @Override

                public void onDraw(Canvas canvas) {

                }

                @Override

                public void onDarkIntensityChange(float intensity) {

                }

                @Override

                public void onLayout(boolean changed, int left, int top, int right, int bottom) {

                }

            };

        }

        @Override

        public int getVersion() {

            return 0;

        }

        @Override

        public void onCreate(Context sysuiContext, Context pluginContext) {

        }

        @Override

        public void onDestroy() {

        }

    }

}