Tie prediction text to all apps interpolator

Now floating headers get 2 interpolators: one for the header content
itselt, and one for the all apps content that follows. That way, they
can choose to intperolate part of their content as if it were part of
all apps instead of the header. Currently, we do this to animate
predicted icons quickly, followed by the all apps icons, predictions
text, all apps scrollbar, and all apps divider as you continue swiping.

Bug: 132455160
Change-Id: Ib3e373c291e174e1306a53854d0ad4dc29eb4b76

9 files changed, 68 insertions, 46 deletions

diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java
index 311db2193..425fb1399 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java
@@ -31,6 +31,9 @@ import android.util.AttributeSet;
 import android.view.View;
 import android.view.animation.Interpolator;
 
+import androidx.annotation.ColorInt;
+import androidx.core.content.ContextCompat;
+
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherState;
@@ -41,9 +44,6 @@ import com.android.launcher3.allapps.FloatingHeaderView;
 import com.android.launcher3.anim.PropertySetter;
 import com.android.launcher3.util.Themes;
 
-import androidx.annotation.ColorInt;
-import androidx.core.content.ContextCompat;
-
 /**
  * A view which shows a horizontal divider
  */
@@ -288,10 +288,10 @@ public class AppsDividerView extends View implements LauncherStateManager.StateL
     }
 
     @Override
-    public void setContentVisibility(boolean hasHeaderExtra, boolean hasContent,
-            PropertySetter setter, Interpolator fadeInterpolator) {
+    public void setContentVisibility(boolean hasHeaderExtra, boolean hasAllAppsContent,
+            PropertySetter setter, Interpolator headerFade, Interpolator allAppsFade) {
         // Don't use setViewAlpha as we want to control the visibility ourselves.
-        setter.setFloat(this, ALPHA, hasContent ? 1 : 0, fadeInterpolator);
+        setter.setFloat(this, ALPHA, hasAllAppsContent ? 1 : 0, allAppsFade);
     }
 
     @Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
index cb5cbddd4..b406bec82 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
@@ -32,6 +32,9 @@ import android.view.View;
 import android.view.animation.Interpolator;
 import android.widget.LinearLayout;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.DeviceProfile;
@@ -62,9 +65,6 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
 @TargetApi(Build.VERSION_CODES.P)
 public class PredictionRowView extends LinearLayout implements
         LogContainerProvider, OnDeviceProfileChangeListener, FloatingHeaderRow {
@@ -103,6 +103,8 @@ public class PredictionRowView extends LinearLayout implements
 
     private final int mIconTextColor;
     private final int mIconFullTextAlpha;
+    private int mIconLastSetTextAlpha;
+    // Might use mIconFullTextAlpha instead of mIconLastSetTextAlpha if we are translucent.
     private int mIconCurrentTextAlpha;
 
     private FloatingHeaderView mParent;
@@ -315,8 +317,14 @@ public class PredictionRowView extends LinearLayout implements
         }
     }
 
-    public void setTextAlpha(int alpha) {
-        mIconCurrentTextAlpha = alpha;
+    public void setTextAlpha(int textAlpha) {
+        mIconLastSetTextAlpha = textAlpha;
+        if (getAlpha() < 1 && textAlpha > 0) {
+            // If the entire header is translucent, make sure the text is at full opacity so it's
+            // not double-translucent. However, we support keeping the text invisible (alpha == 0).
+            textAlpha = mIconFullTextAlpha;
+        }
+        mIconCurrentTextAlpha = textAlpha;
         int iconColor = setColorAlphaBound(mIconTextColor, mIconCurrentTextAlpha);
         for (int i = 0; i < getChildCount(); i++) {
             ((BubbleTextView) getChildAt(i)).setTextColor(iconColor);
@@ -324,6 +332,13 @@ public class PredictionRowView extends LinearLayout implements
     }
 
     @Override
+    public void setAlpha(float alpha) {
+        super.setAlpha(alpha);
+        // Reapply text alpha so that we update it to be full alpha if the row is now translucent.
+        setTextAlpha(mIconLastSetTextAlpha);
+    }
+
+    @Override
     public boolean hasOverlappingRendering() {
         return false;
     }
@@ -351,23 +366,15 @@ public class PredictionRowView extends LinearLayout implements
     }
 
     @Override
-    public void setContentVisibility(boolean hasHeaderExtra, boolean hasContent,
-            PropertySetter setter, Interpolator fadeInterpolator) {
-        boolean isDrawn = getAlpha() > 0;
-        int textAlpha = hasHeaderExtra
-                ? (hasContent ? mIconFullTextAlpha : 0) // Text follows the content visibility
-                : mIconCurrentTextAlpha; // Leave as before
-        if (!isDrawn) {
-            // If the header is not drawn, no need to animate the text alpha
-            setTextAlpha(textAlpha);
-        } else {
-            setter.setInt(this, TEXT_ALPHA, textAlpha, fadeInterpolator);
-        }
-
+    public void setContentVisibility(boolean hasHeaderExtra, boolean hasAllAppsContent,
+            PropertySetter setter, Interpolator headerFade, Interpolator allAppsFade) {
+        // Text follows all apps visibility
+        int textAlpha = hasHeaderExtra && hasAllAppsContent ? mIconFullTextAlpha : 0;
+        setter.setInt(this, TEXT_ALPHA, textAlpha, allAppsFade);
         setter.setFloat(mOverviewScrollFactor, AnimatedFloat.VALUE,
-                (hasHeaderExtra && !hasContent) ? 1 : 0, LINEAR);
+                (hasHeaderExtra && !hasAllAppsContent) ? 1 : 0, LINEAR);
         setter.setFloat(mContentAlphaFactor, AnimatedFloat.VALUE, hasHeaderExtra ? 1 : 0,
-                fadeInterpolator);
+                headerFade);
     }
 
     @Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java
index 6142cdfc1..ab346c059 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java
@@ -23,13 +23,17 @@ import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.LauncherState.OVERVIEW_PEEK;
 import static com.android.launcher3.LauncherStateManager.ANIM_ALL;
 import static com.android.launcher3.LauncherStateManager.ATOMIC_OVERVIEW_PEEK_COMPONENT;
+import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_ALL_APPS_FADE;
+import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_ALL_APPS_HEADER_FADE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_HOTSEAT_SCALE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_HOTSEAT_TRANSLATE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_VERTICAL_PROGRESS;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_WORKSPACE_FADE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_WORKSPACE_SCALE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_WORKSPACE_TRANSLATE;
+import static com.android.launcher3.anim.Interpolators.ACCEL;
 import static com.android.launcher3.anim.Interpolators.DEACCEL_3;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.anim.Interpolators.OVERSHOOT_1_2;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_OVERVIEW_DISABLED;
 
@@ -43,6 +47,7 @@ import android.view.ViewConfiguration;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.anim.AnimatorSetBuilder;
+import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
 import com.android.quickstep.OverviewInteractionState;
 import com.android.quickstep.util.MotionPauseDetector;
@@ -123,6 +128,13 @@ public class FlingAndHoldTouchController extends PortraitStatesTouchController {
             LauncherState toState) {
         if (fromState == NORMAL && toState == ALL_APPS) {
             AnimatorSetBuilder builder = new AnimatorSetBuilder();
+            // Fade in prediction icons quickly, then rest of all apps after reaching overview.
+            float progressToReachOverview = NORMAL.getVerticalProgress(mLauncher)
+                    - OVERVIEW.getVerticalProgress(mLauncher);
+            builder.setInterpolator(ANIM_ALL_APPS_HEADER_FADE, Interpolators.clampToProgress(ACCEL,
+                    0, ALL_APPS_CONTENT_FADE_THRESHOLD));
+            builder.setInterpolator(ANIM_ALL_APPS_FADE, Interpolators.clampToProgress(LINEAR,
+                    progressToReachOverview, 1));
 
             // Get workspace out of the way quickly, to prepare for potential pause.
             builder.setInterpolator(ANIM_WORKSPACE_SCALE, DEACCEL_3);
diff --git a/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/PortraitStatesTouchController.java b/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/PortraitStatesTouchController.java
index 109d751c4..a55f36b78 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/PortraitStatesTouchController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/PortraitStatesTouchController.java
@@ -62,7 +62,7 @@ public class PortraitStatesTouchController extends AbstractStateChangeTouchContr
     /**
      * The progress at which all apps content will be fully visible when swiping up from overview.
      */
-    private static final float ALL_APPS_CONTENT_FADE_THRESHOLD = 0.08f;
+    protected static final float ALL_APPS_CONTENT_FADE_THRESHOLD = 0.08f;
 
     /**
      * The progress at which recents will begin fading out when swiping up from overview.
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index a64374bc3..5b3beeca7 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -7,6 +7,7 @@ import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
 import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.LauncherState.VERTICAL_SWIPE_INDICATOR;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_ALL_APPS_FADE;
+import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_ALL_APPS_HEADER_FADE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_SCALE;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_VERTICAL_PROGRESS;
 import static com.android.launcher3.anim.Interpolators.FAST_OUT_SLOW_IN;
@@ -208,13 +209,14 @@ public class AllAppsTransitionController implements StateHandler, OnDeviceProfil
         PropertySetter setter = config == null ? NO_ANIM_PROPERTY_SETTER
                 : config.getPropertySetter(builder);
         boolean hasHeaderExtra = (visibleElements & ALL_APPS_HEADER_EXTRA) != 0;
-        boolean hasContent = (visibleElements & ALL_APPS_CONTENT) != 0;
+        boolean hasAllAppsContent = (visibleElements & ALL_APPS_CONTENT) != 0;
 
         Interpolator allAppsFade = builder.getInterpolator(ANIM_ALL_APPS_FADE, LINEAR);
-        setter.setViewAlpha(mAppsView.getContentView(), hasContent ? 1 : 0, allAppsFade);
-        setter.setViewAlpha(mAppsView.getScrollBar(), hasContent ? 1 : 0, allAppsFade);
-        mAppsView.getFloatingHeaderView().setContentVisibility(hasHeaderExtra, hasContent, setter,
-                allAppsFade);
+        Interpolator headerFade = builder.getInterpolator(ANIM_ALL_APPS_HEADER_FADE, allAppsFade);
+        setter.setViewAlpha(mAppsView.getContentView(), hasAllAppsContent ? 1 : 0, allAppsFade);
+        setter.setViewAlpha(mAppsView.getScrollBar(), hasAllAppsContent ? 1 : 0, allAppsFade);
+        mAppsView.getFloatingHeaderView().setContentVisibility(hasHeaderExtra, hasAllAppsContent,
+                setter, headerFade, allAppsFade);
         mAppsView.getSearchUiManager().setContentVisibility(visibleElements, setter, allAppsFade);
 
         setter.setInt(mScrimView, ScrimView.DRAG_HANDLE_ALPHA,
diff --git a/src/com/android/launcher3/allapps/FloatingHeaderRow.java b/src/com/android/launcher3/allapps/FloatingHeaderRow.java
index 922e4f1a3..f899587bc 100644
--- a/src/com/android/launcher3/allapps/FloatingHeaderRow.java
+++ b/src/com/android/launcher3/allapps/FloatingHeaderRow.java
@@ -46,8 +46,8 @@ public interface FloatingHeaderRow {
      */
     boolean hasVisibleContent();
 
-    void setContentVisibility(boolean hasHeaderExtra, boolean hasContent,
-            PropertySetter setter, Interpolator fadeInterpolator);
+    void setContentVisibility(boolean hasHeaderExtra, boolean hasAllAppsContent,
+            PropertySetter setter, Interpolator headerFade, Interpolator allAppsFade);
 
     /**
      * Scrolls the content vertically.
diff --git a/src/com/android/launcher3/allapps/FloatingHeaderView.java b/src/com/android/launcher3/allapps/FloatingHeaderView.java
index 66dced99d..42a0eee77 100644
--- a/src/com/android/launcher3/allapps/FloatingHeaderView.java
+++ b/src/com/android/launcher3/allapps/FloatingHeaderView.java
@@ -27,6 +27,10 @@ import android.view.ViewGroup;
 import android.view.animation.Interpolator;
 import android.widget.LinearLayout;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.Launcher;
@@ -40,10 +44,6 @@ import com.android.systemui.plugins.PluginListener;
 import java.util.ArrayList;
 import java.util.Map;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.recyclerview.widget.RecyclerView;
-
 public class FloatingHeaderView extends LinearLayout implements
         ValueAnimator.AnimatorUpdateListener, PluginListener<AllAppsRow>, Insettable,
         OnHeightUpdatedListener {
@@ -363,14 +363,14 @@ public class FloatingHeaderView extends LinearLayout implements
         p.y = getTop() - mCurrentRV.getTop() - mParent.getTop();
     }
 
-    public void setContentVisibility(boolean hasHeader, boolean hasContent, PropertySetter setter,
-            Interpolator fadeInterpolator) {
+    public void setContentVisibility(boolean hasHeader, boolean hasAllAppsContent,
+            PropertySetter setter, Interpolator headerFade, Interpolator allAppsFade) {
         for (FloatingHeaderRow row : mAllRows) {
-            row.setContentVisibility(hasHeader, hasContent, setter, fadeInterpolator);
+            row.setContentVisibility(hasHeader, hasAllAppsContent, setter, headerFade, allAppsFade);
         }
 
-        allowTouchForwarding(hasContent);
-        setter.setFloat(mTabLayout, ALPHA, hasContent ? 1 : 0, fadeInterpolator);
+        allowTouchForwarding(hasAllAppsContent);
+        setter.setFloat(mTabLayout, ALPHA, hasAllAppsContent ? 1 : 0, headerFade);
     }
 
     protected void allowTouchForwarding(boolean allow) {
diff --git a/src/com/android/launcher3/allapps/PluginHeaderRow.java b/src/com/android/launcher3/allapps/PluginHeaderRow.java
index b283ff405..535ef54bc 100644
--- a/src/com/android/launcher3/allapps/PluginHeaderRow.java
+++ b/src/com/android/launcher3/allapps/PluginHeaderRow.java
@@ -64,10 +64,10 @@ public class PluginHeaderRow implements FloatingHeaderRow {
     }
 
     @Override
-    public void setContentVisibility(boolean hasHeaderExtra, boolean hasContent,
-            PropertySetter setter, Interpolator fadeInterpolator) {
+    public void setContentVisibility(boolean hasHeaderExtra, boolean hasAllAppsContent,
+            PropertySetter setter, Interpolator headerFade, Interpolator allAppsFade) {
         // Don't use setViewAlpha as we want to control the visibility ourselves.
-        setter.setFloat(mView, ALPHA, hasContent ? 1 : 0, fadeInterpolator);
+        setter.setFloat(mView, ALPHA, hasAllAppsContent ? 1 : 0, headerFade);
     }
 
     @Override
diff --git a/src/com/android/launcher3/anim/AnimatorSetBuilder.java b/src/com/android/launcher3/anim/AnimatorSetBuilder.java
index 11db25be4..cd30dea9c 100644
--- a/src/com/android/launcher3/anim/AnimatorSetBuilder.java
+++ b/src/com/android/launcher3/anim/AnimatorSetBuilder.java
@@ -40,6 +40,7 @@ public class AnimatorSetBuilder {
     public static final int ANIM_OVERVIEW_FADE = 9;
     public static final int ANIM_ALL_APPS_FADE = 10;
     public static final int ANIM_OVERVIEW_SCRIM_FADE = 11;
+    public static final int ANIM_ALL_APPS_HEADER_FADE = 12; // e.g. predictions
 
     public static final int FLAG_DONT_ANIMATE_OVERVIEW = 1 << 0;