Merge "Separating the draglayer alpha into multiple dimensions so that different animaitons can run without affecting the other." into ub-launcher3-edmonton

5 files changed, 137 insertions, 8 deletions

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 521ad48a3..0a0e5834d 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -22,10 +22,13 @@ import static android.content.pm.ActivityInfo.CONFIG_SCREEN_SIZE;
 import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_EXIT_DELAY;
 import static com.android.launcher3.LauncherState.ALL_APPS;
 import static com.android.launcher3.LauncherState.NORMAL;
+import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_LAUNCHER_LOAD;
 import static com.android.launcher3.logging.LoggerUtils.newContainerTarget;
 
 import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.annotation.TargetApi;
 import android.app.ActivityOptions;
@@ -103,6 +106,8 @@ import com.android.launcher3.util.ActivityResultInfo;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.MultiHashMap;
+import com.android.launcher3.util.MultiValueAlpha;
+import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.PendingRequestArgs;
@@ -308,7 +313,7 @@ public class Launcher extends BaseDraggingActivity
             if (!internalStateHandled) {
                 // If we are not binding synchronously, show a fade in animation when
                 // the first page bind completes.
-                mLauncherView.setAlpha(0);
+                mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD).setValue(0);
             }
         } else {
             // Pages bound synchronously.
@@ -2086,9 +2091,18 @@ public class Launcher extends BaseDraggingActivity
 
     @Override
     public void finishFirstPageBind(final ViewOnDrawExecutor executor) {
-        if (mLauncherView.getAlpha() < 1) {
-            mLauncherView.animate().alpha(1).withEndAction(
-                    executor == null ? null : executor::onLoadAnimationCompleted).start();
+        AlphaProperty property = mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD);
+        if (property.getValue() < 1) {
+            ObjectAnimator anim = ObjectAnimator.ofFloat(property, MultiValueAlpha.VALUE, 1);
+            if (executor != null) {
+                anim.addListener(new AnimatorListenerAdapter() {
+                    @Override
+                    public void onAnimationEnd(Animator animation) {
+                        executor.onLoadAnimationCompleted();
+                    }
+                });
+            }
+            anim.start();
         } else if (executor != null) {
             executor.onLoadAnimationCompleted();
         }
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 223fa97cf..a03a7a8b2 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -22,6 +22,7 @@ import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_TRANSITION_M
 import static com.android.launcher3.LauncherState.ALL_APPS;
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.SPRING_LOADED;
+import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_OVERLAY;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -1174,7 +1175,7 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
         // different effects based on device performance. On at least one relatively high-end
         // device I've tried, translating the launcher causes things to get quite laggy.
         mLauncher.getDragLayer().setTranslationX(transX);
-        mLauncher.getDragLayer().setAlpha(alpha);
+        mLauncher.getDragLayer().getAlphaProperty(ALPHA_INDEX_OVERLAY).setValue(alpha);
     }
 
     /**
diff --git a/src/com/android/launcher3/dragndrop/DragLayer.java b/src/com/android/launcher3/dragndrop/DragLayer.java
index aad1e5a54..3a1837d31 100644
--- a/src/com/android/launcher3/dragndrop/DragLayer.java
+++ b/src/com/android/launcher3/dragndrop/DragLayer.java
@@ -62,6 +62,12 @@ import java.util.ArrayList;
  */
 public class DragLayer extends BaseDragLayer<Launcher> {
 
+    public static final int ALPHA_INDEX_OVERLAY = 0;
+    public static final int ALPHA_INDEX_LAUNCHER_LOAD = 1;
+    public static final int ALPHA_INDEX_TRANSITIONS = 2;
+    public static final int ALPHA_INDEX_SWIPE_UP = 3;
+    private static final int ALPHA_CHANNEL_COUNT = 4;
+
     public static final int ANIMATION_END_DISAPPEAR = 0;
     public static final int ANIMATION_END_REMAIN_VISIBLE = 2;
 
@@ -90,7 +96,7 @@ public class DragLayer extends BaseDragLayer<Launcher> {
      * @param attrs The attributes set containing the Workspace's customization values.
      */
     public DragLayer(Context context, AttributeSet attrs) {
-        super(context, attrs);
+        super(context, attrs, ALPHA_CHANNEL_COUNT);
 
         // Disable multitouch across the workspace/all apps/customize tray
         setMotionEventSplittingEnabled(false);
diff --git a/src/com/android/launcher3/util/MultiValueAlpha.java b/src/com/android/launcher3/util/MultiValueAlpha.java
new file mode 100644
index 000000000..f810f483d
--- /dev/null
+++ b/src/com/android/launcher3/util/MultiValueAlpha.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2018 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.launcher3.util;
+
+import android.util.Property;
+import android.view.View;
+
+/**
+ * Utility class to handle separating a single value as a factor of multiple values
+ */
+public class MultiValueAlpha {
+
+    public static final Property<AlphaProperty, Float> VALUE =
+            new Property<AlphaProperty, Float>(Float.TYPE, "value") {
+
+                @Override
+                public Float get(AlphaProperty alphaProperty) {
+                    return alphaProperty.mValue;
+                }
+
+                @Override
+                public void set(AlphaProperty object, Float value) {
+                    object.setValue(value);
+                }
+            };
+
+    private final View mView;
+    private final AlphaProperty[] mMyProperties;
+
+    private int mValidMask;
+
+    public MultiValueAlpha(View view, int size) {
+        mView = view;
+        mMyProperties = new AlphaProperty[size];
+
+        mValidMask = 0;
+        for (int i = 0; i < size; i++) {
+            int myMask = 1 << i;
+            mValidMask |= myMask;
+            mMyProperties[i] = new AlphaProperty(myMask);
+        }
+    }
+
+    public AlphaProperty getProperty(int index) {
+        return mMyProperties[index];
+    }
+
+    public class AlphaProperty {
+
+        private final int mMyMask;
+
+        private float mValue = 1;
+        // Factor of all other alpha channels, only valid if mMyMask is present in mValidMask.
+        private float mOthers = 1;
+
+        AlphaProperty(int myMask) {
+            mMyMask = myMask;
+        }
+
+        public void setValue(float value) {
+            if (mValue == value) {
+                return;
+            }
+
+            if ((mValidMask & mMyMask) == 0) {
+                // Our cache value is not correct, recompute it.
+                mOthers = 1;
+                for (AlphaProperty prop : mMyProperties) {
+                    if (prop != this) {
+                        mOthers *= prop.mValue;
+                    }
+                }
+            }
+
+            // Since we have changed our value, all other caches except our own need to be
+            // recomputed. Change mValidMask to indicate the new valid caches (only our own).
+            mValidMask = mMyMask;
+            mValue = value;
+
+            mView.setAlpha(mOthers * mValue);
+        }
+
+        public float getValue() {
+            return mValue;
+        }
+    }
+}
diff --git a/src/com/android/launcher3/views/BaseDragLayer.java b/src/com/android/launcher3/views/BaseDragLayer.java
index 149b38b0f..66d9498a9 100644
--- a/src/com/android/launcher3/views/BaseDragLayer.java
+++ b/src/com/android/launcher3/views/BaseDragLayer.java
@@ -30,6 +30,8 @@ import com.android.launcher3.BaseActivity;
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.InsettableFrameLayout;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.util.MultiValueAlpha;
+import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
 import com.android.launcher3.util.TouchController;
 
 import java.util.ArrayList;
@@ -45,17 +47,18 @@ public abstract class BaseDragLayer<T extends BaseDraggingActivity> extends Inse
     protected final Rect mHitRect = new Rect();
 
     protected final T mActivity;
+    private final MultiValueAlpha mMultiValueAlpha;
 
     protected TouchController[] mControllers;
     protected TouchController mActiveController;
     private TouchCompleteListener mTouchCompleteListener;
 
-    public BaseDragLayer(Context context, AttributeSet attrs) {
+    public BaseDragLayer(Context context, AttributeSet attrs, int alphaChannelCount) {
         super(context, attrs);
         mActivity = (T) BaseActivity.fromContext(context);
+        mMultiValueAlpha = new MultiValueAlpha(this, alphaChannelCount);
     }
 
-
     public boolean isEventOverView(View view, MotionEvent ev) {
         getDescendantRectRelativeToSelf(view, mHitRect);
         return mHitRect.contains((int) ev.getX(), (int) ev.getY());
@@ -276,6 +279,10 @@ public abstract class BaseDragLayer<T extends BaseDraggingActivity> extends Inse
         return new LayoutParams(p);
     }
 
+    public AlphaProperty getAlphaProperty(int index) {
+        return mMultiValueAlpha.getProperty(index);
+    }
+
     public static class LayoutParams extends InsettableFrameLayout.LayoutParams {
         public int x, y;
         public boolean customPosition = false;