| /* |
| * Copyright (C) 2014 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.statusbar.phone; |
| |
| import static com.android.systemui.statusbar.notification.NotificationUtils.interpolate; |
| |
| import android.content.res.Resources; |
| import android.util.MathUtils; |
| import com.android.keyguard.KeyguardStatusView; |
| |
| import com.android.systemui.Interpolators; |
| import com.android.systemui.R; |
| |
| /** |
| * Utility class to calculate the clock position and top padding of notifications on Keyguard. |
| */ |
| public class KeyguardClockPositionAlgorithm { |
| |
| private static final long MILLIS_PER_MINUTES = 1000 * 60; |
| private static final float BURN_IN_PREVENTION_PERIOD_Y = 521; |
| private static final float BURN_IN_PREVENTION_PERIOD_X = 83; |
| |
| /** |
| * How much the clock height influences the shade position. |
| * 0 means nothing, 1 means move the shade up by the height of the clock |
| * 0.5f means move the shade up by half of the size of the clock. |
| */ |
| private static float CLOCK_HEIGHT_WEIGHT = 0.7f; |
| |
| /** |
| * Margin between the bottom of the clock and the notification shade. |
| */ |
| private int mClockNotificationsMargin; |
| |
| /** |
| * Current height of {@link NotificationPanelView}, considering how much the |
| * user collapsed it. |
| */ |
| private float mExpandedHeight; |
| |
| /** |
| * Height of the parent view - display size in px. |
| */ |
| private int mHeight; |
| |
| /** |
| * Height of {@link KeyguardStatusView}. |
| */ |
| private int mKeyguardStatusHeight; |
| |
| /** |
| * Height of notification stack: Sum of height of each notification. |
| */ |
| private int mNotificationStackHeight; |
| |
| /** |
| * Minimum top margin to avoid overlap with status bar. |
| */ |
| private int mMinTopMargin; |
| |
| /** |
| * Maximum bottom padding to avoid overlap with {@link KeyguardBottomAreaView} or |
| * the ambient indication. |
| */ |
| private int mMaxShadeBottom; |
| |
| /** |
| * Minimum distance from the status bar. |
| */ |
| private int mContainerTopPadding; |
| |
| /** |
| * @see NotificationPanelView#getMaxPanelHeight() |
| */ |
| private float mMaxPanelHeight; |
| |
| /** |
| * Burn-in prevention x translation. |
| */ |
| private int mBurnInPreventionOffsetX; |
| |
| /** |
| * Burn-in prevention y translation. |
| */ |
| private int mBurnInPreventionOffsetY; |
| |
| /** |
| * Doze/AOD transition amount. |
| */ |
| private float mDarkAmount; |
| |
| /** |
| * If keyguard will require a password or just fade away. |
| */ |
| private boolean mCurrentlySecure; |
| |
| /** |
| * If notification panel view currently has a touch. |
| */ |
| private boolean mTracking; |
| |
| /** |
| * Distance in pixels between the top of the screen and the first view of the bouncer. |
| */ |
| private int mBouncerTop; |
| |
| /** |
| * Refreshes the dimension values. |
| */ |
| public void loadDimens(Resources res) { |
| mClockNotificationsMargin = res.getDimensionPixelSize( |
| R.dimen.keyguard_clock_notifications_margin); |
| mContainerTopPadding = res.getDimensionPixelSize( |
| R.dimen.keyguard_clock_top_margin); |
| mBurnInPreventionOffsetX = res.getDimensionPixelSize( |
| R.dimen.burn_in_prevention_offset_x); |
| mBurnInPreventionOffsetY = res.getDimensionPixelSize( |
| R.dimen.burn_in_prevention_offset_y); |
| } |
| |
| public void setup(int minTopMargin, int maxShadeBottom, int notificationStackHeight, |
| float expandedHeight, float maxPanelHeight, int parentHeight, int keyguardStatusHeight, |
| float dark, boolean secure, boolean tracking, int bouncerTop) { |
| mMinTopMargin = minTopMargin + mContainerTopPadding; |
| mMaxShadeBottom = maxShadeBottom; |
| mNotificationStackHeight = notificationStackHeight; |
| mExpandedHeight = expandedHeight; |
| mMaxPanelHeight = maxPanelHeight; |
| mHeight = parentHeight; |
| mKeyguardStatusHeight = keyguardStatusHeight; |
| mDarkAmount = dark; |
| mCurrentlySecure = secure; |
| mTracking = tracking; |
| mBouncerTop = bouncerTop; |
| } |
| |
| public void run(Result result) { |
| final int y = getClockY(); |
| result.clockY = y; |
| result.clockAlpha = getClockAlpha(y); |
| result.stackScrollerPadding = y + mKeyguardStatusHeight; |
| result.clockX = (int) interpolate(0, burnInPreventionOffsetX(), mDarkAmount); |
| } |
| |
| public float getMinStackScrollerPadding() { |
| return mMinTopMargin + mKeyguardStatusHeight + mClockNotificationsMargin; |
| } |
| |
| private int getMaxClockY() { |
| return mHeight / 2 - mKeyguardStatusHeight - mClockNotificationsMargin; |
| } |
| |
| public int getExpandedClockBottom() { |
| return getExpandedClockPosition() + mKeyguardStatusHeight; |
| } |
| |
| /** |
| * Vertically align the clock and the shade in the available space considering only |
| * a percentage of the clock height defined by {@code CLOCK_HEIGHT_WEIGHT}. |
| * @return Clock Y in pixels. |
| */ |
| private int getExpandedClockPosition() { |
| final int availableHeight = mMaxShadeBottom - mMinTopMargin; |
| final int containerCenter = mMinTopMargin + availableHeight / 2; |
| |
| float y = containerCenter - mKeyguardStatusHeight * CLOCK_HEIGHT_WEIGHT |
| - mClockNotificationsMargin - mNotificationStackHeight / 2; |
| if (y < mMinTopMargin) { |
| y = mMinTopMargin; |
| } |
| |
| // Don't allow the clock base to be under half of the screen |
| final float maxClockY = getMaxClockY(); |
| if (y > maxClockY) { |
| y = maxClockY; |
| } |
| |
| return (int) y; |
| } |
| |
| private int getClockY() { |
| // Dark: Align the bottom edge of the clock at about half of the screen: |
| final float clockYDark = getMaxClockY() + burnInPreventionOffsetY(); |
| final float clockYRegular = getExpandedClockPosition(); |
| final boolean hasEnoughSpace = mMinTopMargin + mKeyguardStatusHeight < mBouncerTop; |
| float clockYTarget = mCurrentlySecure && hasEnoughSpace ? |
| mMinTopMargin : -mKeyguardStatusHeight; |
| |
| // Move clock up while collapsing the shade |
| float shadeExpansion = mExpandedHeight / mMaxPanelHeight; |
| shadeExpansion = Interpolators.FAST_OUT_LINEAR_IN.getInterpolation(shadeExpansion); |
| final float clockY = MathUtils.lerp(clockYTarget, clockYRegular, shadeExpansion); |
| |
| return (int) MathUtils.lerp(clockY, clockYDark, mDarkAmount); |
| } |
| |
| /** |
| * We might want to fade out the clock when the user is swiping up. |
| * One exception is when the bouncer will become visible, in this cause the clock |
| * should always persist. |
| * |
| * @param y Current clock Y. |
| * @return Alpha from 0 to 1. |
| */ |
| private float getClockAlpha(int y) { |
| float alphaKeyguard; |
| if (mCurrentlySecure) { |
| alphaKeyguard = 1; |
| } else { |
| alphaKeyguard = Math.max(0, Math.min(1, (y - mMinTopMargin) |
| / Math.max(1f, getExpandedClockPosition() - mMinTopMargin))); |
| alphaKeyguard = Interpolators.ACCELERATE.getInterpolation(alphaKeyguard); |
| } |
| return MathUtils.lerp(alphaKeyguard, 1f, mDarkAmount); |
| } |
| |
| private float burnInPreventionOffsetY() { |
| return zigzag(System.currentTimeMillis() / MILLIS_PER_MINUTES, |
| mBurnInPreventionOffsetY * 2, |
| BURN_IN_PREVENTION_PERIOD_Y) |
| - mBurnInPreventionOffsetY; |
| } |
| |
| private float burnInPreventionOffsetX() { |
| return zigzag(System.currentTimeMillis() / MILLIS_PER_MINUTES, |
| mBurnInPreventionOffsetX * 2, |
| BURN_IN_PREVENTION_PERIOD_X) |
| - mBurnInPreventionOffsetX; |
| } |
| |
| /** |
| * Implements a continuous, piecewise linear, periodic zig-zag function |
| * |
| * Can be thought of as a linear approximation of abs(sin(x))) |
| * |
| * @param period period of the function, ie. zigzag(x + period) == zigzag(x) |
| * @param amplitude maximum value of the function |
| * @return a value between 0 and amplitude |
| */ |
| private float zigzag(float x, float amplitude, float period) { |
| float xprime = (x % period) / (period / 2); |
| float interpolationAmount = (xprime <= 1) ? xprime : (2 - xprime); |
| return interpolate(0, amplitude, interpolationAmount); |
| } |
| |
| public static class Result { |
| |
| /** |
| * The x translation of the clock. |
| */ |
| public int clockX; |
| |
| /** |
| * The y translation of the clock. |
| */ |
| public int clockY; |
| |
| /** |
| * The alpha value of the clock. |
| */ |
| public float clockAlpha; |
| |
| /** |
| * The top padding of the stack scroller, in pixels. |
| */ |
| public int stackScrollerPadding; |
| } |
| } |