| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.classifier.brightline; |
| |
| import static com.android.internal.config.sysui.SystemUiDeviceConfigFlags.BRIGHTLINE_FALSING_DIAGONAL_HORIZONTAL_ANGLE_RANGE; |
| import static com.android.internal.config.sysui.SystemUiDeviceConfigFlags.BRIGHTLINE_FALSING_DIAGONAL_VERTICAL_ANGLE_RANGE; |
| import static com.android.systemui.classifier.Classifier.LEFT_AFFORDANCE; |
| import static com.android.systemui.classifier.Classifier.RIGHT_AFFORDANCE; |
| |
| import android.provider.DeviceConfig; |
| |
| import com.android.systemui.util.DeviceConfigProxy; |
| |
| import java.util.Locale; |
| |
| /** |
| * False on swipes that are too close to 45 degrees. |
| * |
| * Horizontal swipes may have a different threshold than vertical. |
| * |
| * This falser should not run on "affordance" swipes, as they will always be close to 45. |
| */ |
| class DiagonalClassifier extends FalsingClassifier { |
| |
| private static final float HORIZONTAL_ANGLE_RANGE = (float) (5f / 360f * Math.PI * 2f); |
| private static final float VERTICAL_ANGLE_RANGE = (float) (5f / 360f * Math.PI * 2f); |
| private static final float DIAGONAL = (float) (Math.PI / 4); // 45 deg |
| private static final float NINETY_DEG = (float) (Math.PI / 2); |
| private static final float ONE_HUNDRED_EIGHTY_DEG = (float) (Math.PI); |
| private static final float THREE_HUNDRED_SIXTY_DEG = (float) (2 * Math.PI); |
| |
| private final float mHorizontalAngleRange; |
| private final float mVerticalAngleRange; |
| |
| DiagonalClassifier(FalsingDataProvider dataProvider, DeviceConfigProxy deviceConfigProxy) { |
| super(dataProvider); |
| |
| mHorizontalAngleRange = deviceConfigProxy.getFloat( |
| DeviceConfig.NAMESPACE_SYSTEMUI, |
| BRIGHTLINE_FALSING_DIAGONAL_HORIZONTAL_ANGLE_RANGE, |
| HORIZONTAL_ANGLE_RANGE); |
| mVerticalAngleRange = deviceConfigProxy.getFloat( |
| DeviceConfig.NAMESPACE_SYSTEMUI, |
| BRIGHTLINE_FALSING_DIAGONAL_VERTICAL_ANGLE_RANGE, |
| VERTICAL_ANGLE_RANGE); |
| } |
| |
| @Override |
| boolean isFalseTouch() { |
| float angle = getAngle(); |
| |
| if (angle == Float.MAX_VALUE) { // Unknown angle |
| return false; |
| } |
| |
| if (getInteractionType() == LEFT_AFFORDANCE |
| || getInteractionType() == RIGHT_AFFORDANCE) { |
| return false; |
| } |
| |
| float minAngle = DIAGONAL - mHorizontalAngleRange; |
| float maxAngle = DIAGONAL + mHorizontalAngleRange; |
| if (isVertical()) { |
| minAngle = DIAGONAL - mVerticalAngleRange; |
| maxAngle = DIAGONAL + mVerticalAngleRange; |
| } |
| |
| return angleBetween(angle, minAngle, maxAngle) |
| || angleBetween(angle, minAngle + NINETY_DEG, maxAngle + NINETY_DEG) |
| || angleBetween(angle, minAngle - NINETY_DEG, maxAngle - NINETY_DEG) |
| || angleBetween(angle, minAngle + ONE_HUNDRED_EIGHTY_DEG, |
| maxAngle + ONE_HUNDRED_EIGHTY_DEG); |
| } |
| |
| @Override |
| String getReason() { |
| return String.format( |
| (Locale) null, |
| "{angle=%f, vertical=%s}", |
| getAngle(), |
| isVertical()); |
| } |
| |
| private boolean angleBetween(float angle, float min, float max) { |
| // No need to normalize angle as it is guaranteed to be between 0 and 2*PI. |
| min = normalizeAngle(min); |
| max = normalizeAngle(max); |
| |
| if (min > max) { // Can happen when angle is close to 0. |
| return angle >= min || angle <= max; |
| } |
| |
| return angle >= min && angle <= max; |
| } |
| |
| private float normalizeAngle(float angle) { |
| if (angle < 0) { |
| return THREE_HUNDRED_SIXTY_DEG + (angle % THREE_HUNDRED_SIXTY_DEG); |
| } else if (angle > THREE_HUNDRED_SIXTY_DEG) { |
| return angle % THREE_HUNDRED_SIXTY_DEG; |
| } |
| return angle; |
| } |
| } |