Implement nice transitions for light status bar

- When the flag changes, apply an animation from the current value
- When the flag change is caused by an app transition, synchronize
  the status bar animation with the app transition animation.
  PhoneWindowManager calculates the timings based on some heuristics
  of the app transition animations and supplies these timings to
  StatusBarService.

Bug: 19233606
Change-Id: I4f99afba8f1eebb3524699ed4d7fbafee5463a37

4 files changed, 135 insertions, 3 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java b/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
index 0b1b883..8f88e73 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
@@ -19,6 +19,7 @@ package com.android.systemui.statusbar;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Message;
+import android.util.Pair;
 
 import com.android.internal.statusbar.IStatusBar;
 import com.android.internal.statusbar.StatusBarIcon;
@@ -57,6 +58,9 @@ public class CommandQueue extends IStatusBar.Stub {
     private static final int MSG_NOTIFICATION_LIGHT_OFF     = 16 << MSG_SHIFT;
     private static final int MSG_NOTIFICATION_LIGHT_PULSE   = 17 << MSG_SHIFT;
     private static final int MSG_SHOW_SCREEN_PIN_REQUEST    = 18 << MSG_SHIFT;
+    private static final int MSG_APP_TRANSITION_PENDING     = 19 << MSG_SHIFT;
+    private static final int MSG_APP_TRANSITION_CANCELLED   = 20 << MSG_SHIFT;
+    private static final int MSG_APP_TRANSITION_STARTING    = 21 << MSG_SHIFT;
 
     public static final int FLAG_EXCLUDE_NONE = 0;
     public static final int FLAG_EXCLUDE_SEARCH_PANEL = 1 << 0;
@@ -99,6 +103,9 @@ public class CommandQueue extends IStatusBar.Stub {
         public void notificationLightOff();
         public void notificationLightPulse(int argb, int onMillis, int offMillis);
         public void showScreenPinningRequest();
+        public void appTransitionPending();
+        public void appTransitionCancelled();
+        public void appTransitionStarting(long startTime, long duration);
     }
 
     public CommandQueue(Callbacks callbacks, StatusBarIconList list) {
@@ -246,6 +253,28 @@ public class CommandQueue extends IStatusBar.Stub {
         }
     }
 
+    public void appTransitionPending() {
+        synchronized (mList) {
+            mHandler.removeMessages(MSG_APP_TRANSITION_PENDING);
+            mHandler.sendEmptyMessage(MSG_APP_TRANSITION_PENDING);
+        }
+    }
+
+    public void appTransitionCancelled() {
+        synchronized (mList) {
+            mHandler.removeMessages(MSG_APP_TRANSITION_PENDING);
+            mHandler.sendEmptyMessage(MSG_APP_TRANSITION_PENDING);
+        }
+    }
+
+    public void appTransitionStarting(long startTime, long duration) {
+        synchronized (mList) {
+            mHandler.removeMessages(MSG_APP_TRANSITION_STARTING);
+            mHandler.obtainMessage(MSG_APP_TRANSITION_STARTING, Pair.create(startTime, duration))
+                    .sendToTarget();
+        }
+    }
+
     private final class H extends Handler {
         public void handleMessage(Message msg) {
             final int what = msg.what & MSG_MASK;
@@ -328,6 +357,16 @@ public class CommandQueue extends IStatusBar.Stub {
                 case MSG_SHOW_SCREEN_PIN_REQUEST:
                     mCallbacks.showScreenPinningRequest();
                     break;
+                case MSG_APP_TRANSITION_PENDING:
+                    mCallbacks.appTransitionPending();
+                    break;
+                case MSG_APP_TRANSITION_CANCELLED:
+                    mCallbacks.appTransitionCancelled();
+                    break;
+                case MSG_APP_TRANSITION_STARTING:
+                    Pair<Long, Long> data = (Pair<Long, Long>) msg.obj;
+                    mCallbacks.appTransitionStarting(data.first, data.second);
+                    break;
             }
         }
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index ece69d3..3740d2a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -101,7 +101,6 @@ import android.view.WindowManagerGlobal;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.AccelerateDecelerateInterpolator;
 import android.view.animation.AccelerateInterpolator;
-import android.view.animation.AnimationUtils;
 import android.view.animation.Interpolator;
 import android.view.animation.LinearInterpolator;
 import android.view.animation.PathInterpolator;
@@ -115,7 +114,6 @@ import com.android.systemui.BatteryMeterView;
 import com.android.systemui.DemoMode;
 import com.android.systemui.EventLogConstants;
 import com.android.systemui.EventLogTags;
-import com.android.systemui.FontSizeUtils;
 import com.android.systemui.R;
 import com.android.systemui.doze.DozeHost;
 import com.android.systemui.doze.DozeLog;
@@ -138,7 +136,6 @@ import com.android.systemui.statusbar.NotificationOverflowContainer;
 import com.android.systemui.statusbar.ScrimView;
 import com.android.systemui.statusbar.SignalClusterView;
 import com.android.systemui.statusbar.SpeedBumpView;
-import com.android.systemui.statusbar.StatusBarIconView;
 import com.android.systemui.statusbar.StatusBarState;
 import com.android.systemui.statusbar.phone.UnlockMethodCache.OnUnlockMethodChangedListener;
 import com.android.systemui.statusbar.policy.AccessibilityController;
@@ -3638,6 +3635,21 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
         }
     }
 
+    @Override
+    public void appTransitionPending() {
+        mIconController.appTransitionPending();
+    }
+
+    @Override
+    public void appTransitionCancelled() {
+        mIconController.appTransitionCancelled();
+    }
+
+    @Override
+    public void appTransitionStarting(long startTime, long duration) {
+        mIconController.appTransitionStarting(startTime, duration);
+    }
+
     private final class ShadeUpdates {
         private final ArraySet<String> mVisibleNotifications = new ArraySet<String>();
         private final ArraySet<String> mNewVisibleNotifications = new ArraySet<String>();
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
index 5622993..8662b04 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
@@ -16,11 +16,13 @@
 
 package com.android.systemui.statusbar.phone;
 
+import android.animation.ValueAnimator;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.graphics.Color;
 import android.graphics.PorterDuff;
 import android.os.Bundle;
+import android.os.SystemClock;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.animation.AnimationUtils;
@@ -48,9 +50,12 @@ import java.util.ArrayList;
  */
 public class StatusBarIconController {
 
+    private static final long DEFAULT_TINT_ANIMATION_DURATION = 120;
+
     private Context mContext;
     private PhoneStatusBar mPhoneStatusBar;
     private Interpolator mLinearOutSlowIn;
+    private Interpolator mFastOutSlowIn;
     private DemoStatusIcons mDemoStatusIcons;
     private NotificationColorUtil mNotificationColorUtil;
 
@@ -69,6 +74,11 @@ public class StatusBarIconController {
 
     private int mIconTint = Color.WHITE;
 
+    private boolean mTransitionPending;
+    private boolean mTintChangePending;
+    private int mPendingIconTint;
+    private ValueAnimator mTintAnimator;
+
     public StatusBarIconController(Context context, View statusBar, View keyguardStatusBar,
             PhoneStatusBar phoneStatusBar) {
         mContext = context;
@@ -86,6 +96,8 @@ public class StatusBarIconController {
         mClock = (TextView) statusBar.findViewById(R.id.clock);
         mLinearOutSlowIn = AnimationUtils.loadInterpolator(mContext,
                 android.R.interpolator.linear_out_slow_in);
+        mFastOutSlowIn = AnimationUtils.loadInterpolator(mContext,
+                android.R.interpolator.fast_out_slow_in);
         updateResources();
     }
 
@@ -268,10 +280,45 @@ public class StatusBarIconController {
     }
 
     public void setIconTint(int tint) {
+        if (mTransitionPending) {
+            deferIconTintChange(tint);
+        } else {
+            animateIconTint(tint, 0 /* delay */, DEFAULT_TINT_ANIMATION_DURATION);
+        }
+    }
+
+    private void animateIconTint(int targetTint, long delay, long duration) {
+        if (mTintAnimator != null) {
+            mTintAnimator.cancel();
+        }
+        if (mIconTint == targetTint) {
+            return;
+        }
+        mTintAnimator = ValueAnimator.ofArgb(mIconTint, targetTint);
+        mTintAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+                setIconTintInternal((Integer) animation.getAnimatedValue());
+            }
+        });
+        mTintAnimator.setDuration(duration);
+        mTintAnimator.setStartDelay(delay);
+        mTintAnimator.setInterpolator(mFastOutSlowIn);
+        mTintAnimator.start();
+    }
+    private void setIconTintInternal(int tint) {
         mIconTint = tint;
         applyIconTint();
     }
 
+    private void deferIconTintChange(int tint) {
+        if (mTintChangePending && tint == mPendingIconTint) {
+            return;
+        }
+        mTintChangePending = true;
+        mPendingIconTint = tint;
+    }
+
     private void applyIconTint() {
         for (int i = 0; i < mStatusIcons.getChildCount(); i++) {
             StatusBarIconView v = (StatusBarIconView) mStatusIcons.getChildAt(i);
@@ -305,4 +352,26 @@ public class StatusBarIconController {
         v.setTag(R.id.icon_is_grayscale, grayscale);
         return grayscale;
     }
+
+    public void appTransitionPending() {
+        mTransitionPending = true;
+    }
+
+    public void appTransitionCancelled() {
+        if (mTransitionPending && mTintChangePending) {
+            mTintChangePending = false;
+            animateIconTint(mPendingIconTint, 0 /* delay */, DEFAULT_TINT_ANIMATION_DURATION);
+        }
+        mTransitionPending = false;
+    }
+
+    public void appTransitionStarting(long startTime, long duration) {
+        if (mTransitionPending && mTintChangePending) {
+            mTintChangePending = false;
+            animateIconTint(mPendingIconTint,
+                    Math.max(0, startTime - SystemClock.uptimeMillis()),
+                    duration);
+        }
+        mTransitionPending = false;
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java
index 6f2a392..413c891 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java
@@ -170,4 +170,16 @@ public class TvStatusBar extends BaseStatusBar {
     @Override
     public void showScreenPinningRequest() {
     }
+
+    @Override
+    public void appTransitionPending() {
+    }
+
+    @Override
+    public void appTransitionCancelled() {
+    }
+
+    @Override
+    public void appTransitionStarting(long startTime, long duration) {
+    }
 }