package org.briarproject.briar.android.widget;

import android.content.Context;
import android.support.annotation.AttrRes;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.FrameLayout;

import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import org.briarproject.briar.android.util.UiUtils;

import javax.annotation.Nullable;

import static android.view.MotionEvent.FLAG_WINDOW_IS_OBSCURED;

@NotNullByDefault
public class TapSafeFrameLayout extends FrameLayout {

	@Nullable
	private OnTapFilteredListener listener;

	public TapSafeFrameLayout(Context context) {
		super(context);
		UiUtils.setFilterTouchesWhenObscured(this, false);
	}

	public TapSafeFrameLayout(Context context, @Nullable AttributeSet attrs) {
		super(context, attrs);
		UiUtils.setFilterTouchesWhenObscured(this, false);
	}

	public TapSafeFrameLayout(Context context, @Nullable AttributeSet attrs,
			@AttrRes int defStyleAttr) {
		super(context, attrs, defStyleAttr);
		UiUtils.setFilterTouchesWhenObscured(this, false);
	}

	public void setOnTapFilteredListener(OnTapFilteredListener listener) {
		this.listener = listener;
	}

	@Override
	public boolean onFilterTouchEventForSecurity(MotionEvent e) {
		boolean obscured = (e.getFlags() & FLAG_WINDOW_IS_OBSCURED) != 0;
		if (obscured && listener != null) return listener.shouldAllowTap();
		else return !obscured;
	}

	public interface OnTapFilteredListener {
		boolean shouldAllowTap();
	}
}
