Using view elevation for shadow during click feedback instead of
creating a shadow bitmap

Change-Id: I331186664c3c448596af3172e0e080921a6a1908
diff --git a/res/layout/deep_shortcut.xml b/res/layout/deep_shortcut.xml
index 4a2ad42..4a3db1f 100644
--- a/res/layout/deep_shortcut.xml
+++ b/res/layout/deep_shortcut.xml
@@ -35,6 +35,7 @@
         android:textColor="?android:attr/textColorPrimary"
         android:fontFamily="sans-serif"
         launcher:layoutHorizontal="true"
+        launcher:deferShadowGeneration="true"
         launcher:iconDisplay="shortcut_popup"
         launcher:iconSizeOverride="@dimen/deep_shortcut_icon_size" />
 
diff --git a/res/layout/system_shortcut.xml b/res/layout/system_shortcut.xml
index 04f3d02..1888e22 100644
--- a/res/layout/system_shortcut.xml
+++ b/res/layout/system_shortcut.xml
@@ -34,6 +34,7 @@
         android:fontFamily="sans-serif"
         launcher:iconDisplay="shortcut_popup"
         launcher:layoutHorizontal="true"
+        launcher:deferShadowGeneration="true"
         android:focusable="false" />
 
     <View
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index eb12dc8..957ec19 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -15,7 +15,10 @@
 -->
 
 <resources>
-<!-- Dynamic Grid -->
+
+    <dimen name="click_shadow_elevation">4dp</dimen>
+
+    <!-- Dynamic Grid -->
     <dimen name="dynamic_grid_edge_margin">8dp</dimen>
     <dimen name="dynamic_grid_min_page_indicator_size">32dp</dimen>
     <dimen name="dynamic_grid_page_indicator_line_height">1dp</dimen>
diff --git a/src/com/android/launcher3/AppInfo.java b/src/com/android/launcher3/AppInfo.java
index a5422aa..9796d18 100644
--- a/src/com/android/launcher3/AppInfo.java
+++ b/src/com/android/launcher3/AppInfo.java
@@ -21,9 +21,12 @@
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
+import android.os.Build;
+import android.os.Process;
 import android.os.UserHandle;
 
 import com.android.launcher3.compat.UserManagerCompat;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.PackageManagerHelper;
 
@@ -59,17 +62,12 @@
         this.componentName = info.getComponentName();
         this.container = ItemInfo.NO_ID;
         this.user = user;
-        if (PackageManagerHelper.isAppSuspended(info.getApplicationInfo())) {
-            runtimeStatusFlags |= ShortcutInfo.FLAG_DISABLED_SUSPENDED;
-        }
-        if (quietModeEnabled) {
-            runtimeStatusFlags |= ShortcutInfo.FLAG_DISABLED_QUIET_USER;
-        }
-
         intent = makeLaunchIntent(info);
-        runtimeStatusFlags |= (info.getApplicationInfo().flags & ApplicationInfo.FLAG_SYSTEM) == 0
-                ? FLAG_SYSTEM_NO : FLAG_SYSTEM_YES;
 
+        if (quietModeEnabled) {
+            runtimeStatusFlags |= FLAG_DISABLED_QUIET_USER;
+        }
+        updateRuntimeFlagsForActivityTarget(this, info);
     }
 
     public AppInfo(AppInfo info) {
@@ -102,4 +100,21 @@
                 .setComponent(cn)
                 .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
     }
+
+    public static void updateRuntimeFlagsForActivityTarget(
+            ItemInfoWithIcon info, LauncherActivityInfo lai) {
+        ApplicationInfo appInfo = lai.getApplicationInfo();
+        if (PackageManagerHelper.isAppSuspended(appInfo)) {
+            info.runtimeStatusFlags |= FLAG_DISABLED_SUSPENDED;
+        }
+        info.runtimeStatusFlags |= (appInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0
+                ? FLAG_SYSTEM_NO : FLAG_SYSTEM_YES;
+
+        if (FeatureFlags.LEGACY_ICON_TREATMENT && Utilities.ATLEAST_OREO
+                && appInfo.targetSdkVersion >= Build.VERSION_CODES.O
+                && Process.myUserHandle().equals(lai.getUser())) {
+            // The icon for a non-primary user is badged, hence it's not exactly an adaptive icon.
+            info.runtimeStatusFlags |= FLAG_ADAPTIVE_ICON;
+        }
+    }
 }
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 3162286..79a34a0 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -385,16 +385,7 @@
 
     @Override
     public void setPressedIcon(BubbleTextView icon, Bitmap background) {
-        if (icon == null || background == null) {
-            mTouchFeedbackView.setBitmap(null);
-            mTouchFeedbackView.animate().cancel();
-        } else {
-            if (mTouchFeedbackView.setBitmap(background)) {
-                mTouchFeedbackView.alignWithIconView(icon, mShortcutsAndWidgets,
-                        null /* clipAgainstView */);
-                mTouchFeedbackView.animateShadow();
-            }
-        }
+        mTouchFeedbackView.setPressedIcon(icon, background);
     }
 
     void setIsDragOverlapping(boolean isDragOverlapping) {
diff --git a/src/com/android/launcher3/ClickShadowView.java b/src/com/android/launcher3/ClickShadowView.java
index aad1112..5391b4d 100644
--- a/src/com/android/launcher3/ClickShadowView.java
+++ b/src/com/android/launcher3/ClickShadowView.java
@@ -16,15 +16,28 @@
 
 package com.android.launcher3;
 
+import static com.android.launcher3.FastBitmapDrawable.CLICK_FEEDBACK_DURATION;
+import static com.android.launcher3.FastBitmapDrawable.CLICK_FEEDBACK_INTERPOLATOR;
+import static com.android.launcher3.LauncherAnimUtils.ELEVATION;
+import static com.android.launcher3.graphics.HolographicOutlineHelper.ADAPTIVE_ICON_SHADOW_BITMAP;
+
+import android.animation.ObjectAnimator;
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
+import android.graphics.Outline;
 import android.graphics.Paint;
 import android.graphics.Rect;
+import android.graphics.drawable.AdaptiveIconDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.util.Property;
 import android.view.View;
 import android.view.ViewDebug;
 import android.view.ViewGroup;
+import android.view.ViewOutlineProvider;
 
 public class ClickShadowView extends View {
 
@@ -32,6 +45,8 @@
     private static final int SHADOW_LOW_ALPHA = 30;
     private static final int SHADOW_HIGH_ALPHA = 60;
 
+    private static float sAdaptiveIconScaleFactor = 1f;
+
     private final Paint mPaint;
 
     @ViewDebug.ExportedProperty(category = "launcher")
@@ -40,6 +55,10 @@
     private final float mShadowPadding;
 
     private Bitmap mBitmap;
+    private ObjectAnimator mAnim;
+
+    private Drawable mAdaptiveIcon;
+    private ViewOutlineProvider mOutlineProvider;
 
     public ClickShadowView(Context context) {
         super(context);
@@ -50,6 +69,10 @@
         mShadowOffset = getResources().getDimension(R.dimen.click_shadow_high_shift);
     }
 
+    public static void setAdaptiveIconScaleFactor(float factor) {
+        sAdaptiveIconScaleFactor = factor;
+    }
+
     /**
      * @return extra space required by the view to show the shadow.
      */
@@ -57,11 +80,64 @@
         return (int) (SHADOW_SIZE_FACTOR * mShadowPadding);
     }
 
+    public void setPressedIcon(BubbleTextView icon, Bitmap background) {
+        if (icon == null) {
+            setBitmap(null);
+            cancelAnim();
+            return;
+        }
+        if (background == null) {
+            if (mBitmap == ADAPTIVE_ICON_SHADOW_BITMAP) {
+                // clear animation shadow
+            }
+            setBitmap(null);
+            cancelAnim();
+            icon.setOutlineProvider(null);
+        } else if (setBitmap(background)) {
+            if (mBitmap == ADAPTIVE_ICON_SHADOW_BITMAP) {
+                setupAdaptiveShadow(icon);
+                cancelAnim();
+                startAnim(icon, ELEVATION,
+                        getResources().getDimension(R.dimen.click_shadow_elevation));
+            } else {
+                alignWithIconView(icon);
+                startAnim(this, ALPHA, 1);
+            }
+        }
+    }
+
+    @TargetApi(Build.VERSION_CODES.O)
+    private void setupAdaptiveShadow(final BubbleTextView view) {
+        if (mAdaptiveIcon == null) {
+            mAdaptiveIcon = new AdaptiveIconDrawable(null, null);
+            mOutlineProvider = new ViewOutlineProvider() {
+                @Override
+                public void getOutline(View view, Outline outline) {
+                    mAdaptiveIcon.getOutline(outline);
+                }
+            };
+        }
+
+        int iconWidth = view.getRight() - view.getLeft();
+        int iconHSpace = iconWidth - view.getCompoundPaddingRight() - view.getCompoundPaddingLeft();
+        int drawableWidth = view.getIcon().getBounds().width();
+
+        Rect bounds = new Rect();
+        bounds.left = view.getCompoundPaddingLeft() + (iconHSpace - drawableWidth) / 2;
+        bounds.right = bounds.left + drawableWidth;
+        bounds.top = view.getPaddingTop();
+        bounds.bottom = bounds.top + view.getIcon().getBounds().height();
+        Utilities.scaleRectAboutCenter(bounds, sAdaptiveIconScaleFactor);
+
+        mAdaptiveIcon.setBounds(bounds);
+        view.setOutlineProvider(mOutlineProvider);
+    }
+
     /**
      * Applies the new bitmap.
      * @return true if the view was invalidated.
      */
-    public boolean setBitmap(Bitmap b) {
+    private boolean setBitmap(Bitmap b) {
         if (b != mBitmap){
             mBitmap = b;
             invalidate();
@@ -80,48 +156,51 @@
         }
     }
 
-    public void animateShadow() {
-        setAlpha(0);
-        animate().alpha(1)
-            .setDuration(FastBitmapDrawable.CLICK_FEEDBACK_DURATION)
-            .setInterpolator(FastBitmapDrawable.CLICK_FEEDBACK_INTERPOLATOR)
-            .start();
+    private void cancelAnim() {
+        if (mAnim != null) {
+            mAnim.cancel();
+            mAnim.setCurrentPlayTime(0);
+            mAnim = null;
+        }
+    }
+
+    private void startAnim(View target, Property<View, Float> property, float endValue) {
+        cancelAnim();
+        property.set(target, 0f);
+        mAnim = ObjectAnimator.ofFloat(target, property, endValue);
+        mAnim.setDuration(CLICK_FEEDBACK_DURATION)
+                .setInterpolator(CLICK_FEEDBACK_INTERPOLATOR);
+        mAnim.start();
     }
 
     /**
      * Aligns the shadow with {@param view}
-     * @param viewParent immediate parent of {@param view}. It must be a sibling of this view.
+     * Note: {@param view} must be a descendant of my parent.
      */
-    public void alignWithIconView(BubbleTextView view, ViewGroup viewParent, View clipAgainstView) {
-        float leftShift = view.getLeft() + viewParent.getLeft() - getLeft();
-        float topShift = view.getTop() + viewParent.getTop() - getTop();
+    private void alignWithIconView(BubbleTextView view) {
+        int[] coords = new int[] {0, 0};
+        Utilities.getDescendantCoordRelativeToAncestor(
+                (ViewGroup) view.getParent(), (View) getParent(), coords, false);
+
+        float leftShift = view.getLeft() + coords[0] - getLeft();
+        float topShift = view.getTop() + coords[1] - getTop();
         int iconWidth = view.getRight() - view.getLeft();
         int iconHeight = view.getBottom() - view.getTop();
         int iconHSpace = iconWidth - view.getCompoundPaddingRight() - view.getCompoundPaddingLeft();
         float drawableWidth = view.getIcon().getBounds().width();
 
-        if (clipAgainstView != null) {
-            // Set the bounds to clip against
-            int[] coords = new int[] {0, 0};
-            Utilities.getDescendantCoordRelativeToAncestor(clipAgainstView, (View) getParent(),
-                    coords, false);
-            int clipLeft = (int) Math.max(0, coords[0] - leftShift - mShadowPadding);
-            int clipTop = (int) Math.max(0, coords[1] - topShift - mShadowPadding) ;
-            setClipBounds(new Rect(clipLeft, clipTop, clipLeft + iconWidth, clipTop + iconHeight));
-        } else {
-            // Reset the clip bounds
-            setClipBounds(null);
-        }
+        // Set the bounds to clip against
+        int clipLeft = (int) Math.max(0, coords[0] - leftShift - mShadowPadding);
+        int clipTop = (int) Math.max(0, coords[1] - topShift - mShadowPadding) ;
+        setClipBounds(new Rect(clipLeft, clipTop, clipLeft + iconWidth, clipTop + iconHeight));
 
         setTranslationX(leftShift
-                + viewParent.getTranslationX()
                 + view.getCompoundPaddingLeft() * view.getScaleX()
                 + (iconHSpace - drawableWidth) * view.getScaleX() / 2  /* drawable gap */
                 + iconWidth * (1 - view.getScaleX()) / 2  /* gap due to scale */
                 - mShadowPadding  /* extra shadow size */
                 );
         setTranslationY(topShift
-                + viewParent.getTranslationY()
                 + view.getPaddingTop() * view.getScaleY()  /* drawable gap */
                 + view.getHeight() * (1 - view.getScaleY()) / 2  /* gap due to scale */
                 - mShadowPadding  /* extra shadow size */
diff --git a/src/com/android/launcher3/ItemInfoWithIcon.java b/src/com/android/launcher3/ItemInfoWithIcon.java
index 1c4e88b..fea4dda 100644
--- a/src/com/android/launcher3/ItemInfoWithIcon.java
+++ b/src/com/android/launcher3/ItemInfoWithIcon.java
@@ -67,7 +67,6 @@
             FLAG_DISABLED_NOT_AVAILABLE | FLAG_DISABLED_SUSPENDED |
             FLAG_DISABLED_QUIET_USER | FLAG_DISABLED_BY_PUBLISHER | FLAG_DISABLED_LOCKED_USER;
 
-
     /**
      * The item points to a system app.
      */
@@ -81,6 +80,12 @@
     public static final int FLAG_SYSTEM_MASK = FLAG_SYSTEM_YES | FLAG_SYSTEM_NO;
 
     /**
+     * Flag indicating that the icon is an {@link android.graphics.drawable.AdaptiveIconDrawable}
+     * that can be optimized in various way.
+     */
+    public static final int FLAG_ADAPTIVE_ICON = 1 << 8;
+
+    /**
      * Status associated with the system state of the underlying item. This is calculated every
      * time a new info is created and not persisted on the disk.
      */
diff --git a/src/com/android/launcher3/LauncherAnimUtils.java b/src/com/android/launcher3/LauncherAnimUtils.java
index dfe51af..9869fdf 100644
--- a/src/com/android/launcher3/LauncherAnimUtils.java
+++ b/src/com/android/launcher3/LauncherAnimUtils.java
@@ -164,4 +164,17 @@
                     view.setScaleY(scale);
                 }
             };
+
+    public static final Property<View, Float> ELEVATION =
+            new Property<View, Float>(Float.class, "elevation") {
+                @Override
+                public Float get(View view) {
+                    return view.getElevation();
+                }
+
+                @Override
+                public void set(View view, Float elevation) {
+                    view.setElevation(elevation);
+                }
+            };
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index a1f37ba..81f5842 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -157,14 +157,7 @@
 
     @Override
     public void setPressedIcon(BubbleTextView icon, Bitmap background) {
-        if (icon == null || background == null) {
-            mTouchFeedbackView.setBitmap(null);
-            mTouchFeedbackView.animate().cancel();
-        } else if (mTouchFeedbackView.setBitmap(background)) {
-            View rv = findViewById(R.id.apps_list_view);
-            mTouchFeedbackView.alignWithIconView(icon, (ViewGroup) icon.getParent(), rv);
-            mTouchFeedbackView.animateShadow();
-        }
+        mTouchFeedbackView.setPressedIcon(icon, background);
     }
 
     /**
diff --git a/src/com/android/launcher3/graphics/HolographicOutlineHelper.java b/src/com/android/launcher3/graphics/HolographicOutlineHelper.java
index 9e67f56..fdf2d67 100644
--- a/src/com/android/launcher3/graphics/HolographicOutlineHelper.java
+++ b/src/com/android/launcher3/graphics/HolographicOutlineHelper.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.graphics;
 
+import static com.android.launcher3.ItemInfoWithIcon.FLAG_ADAPTIVE_ICON;
+
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BlurMaskFilter;
@@ -29,6 +31,7 @@
 import android.util.SparseArray;
 
 import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.ItemInfoWithIcon;
 import com.android.launcher3.R;
 
 /**
@@ -37,6 +40,12 @@
  */
 public class HolographicOutlineHelper {
 
+    /**
+     * Bitmap used as shadow for Adaptive icons
+     */
+    public static final Bitmap ADAPTIVE_ICON_SHADOW_BITMAP =
+            Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
+
     private static HolographicOutlineHelper sInstance;
 
     private final Canvas mCanvas = new Canvas();
@@ -63,6 +72,11 @@
     }
 
     public Bitmap createMediumDropShadow(BubbleTextView view) {
+        if (view.getTag() instanceof ItemInfoWithIcon &&
+                ((((ItemInfoWithIcon) view.getTag()).runtimeStatusFlags & FLAG_ADAPTIVE_ICON)
+                        != 0)) {
+            return ADAPTIVE_ICON_SHADOW_BITMAP;
+        }
         Drawable drawable = view.getIcon();
         if (drawable == null) {
             return null;
@@ -119,7 +133,7 @@
     }
 
     public void recycleShadowBitmap(Bitmap bitmap) {
-        if (bitmap != null) {
+        if (bitmap != null && bitmap != ADAPTIVE_ICON_SHADOW_BITMAP) {
             mBitmapCache.put((bitmap.getWidth() << 16) | bitmap.getHeight(), bitmap);
         }
     }
diff --git a/src/com/android/launcher3/model/LoaderCursor.java b/src/com/android/launcher3/model/LoaderCursor.java
index 47f370a..ccef9b7 100644
--- a/src/com/android/launcher3/model/LoaderCursor.java
+++ b/src/com/android/launcher3/model/LoaderCursor.java
@@ -16,15 +16,11 @@
 
 package com.android.launcher3.model;
 
-import static com.android.launcher3.ItemInfoWithIcon.FLAG_SYSTEM_NO;
-import static com.android.launcher3.ItemInfoWithIcon.FLAG_SYSTEM_YES;
-
 import android.content.ComponentName;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
 import android.content.Intent.ShortcutIconResource;
-import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
 import android.database.Cursor;
 import android.database.CursorWrapper;
@@ -36,6 +32,7 @@
 import android.util.Log;
 import android.util.LongSparseArray;
 
+import com.android.launcher3.AppInfo;
 import com.android.launcher3.IconCache;
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfo;
@@ -52,7 +49,6 @@
 import com.android.launcher3.util.ContentWriter;
 import com.android.launcher3.util.GridOccupancy;
 import com.android.launcher3.util.LongArrayMap;
-import com.android.launcher3.util.PackageManagerHelper;
 
 import java.net.URISyntaxException;
 import java.security.InvalidParameterException;
@@ -206,7 +202,6 @@
         return TextUtils.isEmpty(title) ? "" : Utilities.trim(title);
     }
 
-
     /**
      * Make an ShortcutInfo object for a restored application or shortcut item that points
      * to a package that is not yet installed on the system.
@@ -279,12 +274,7 @@
         }
 
         if (lai != null) {
-            ApplicationInfo appInfo = lai.getApplicationInfo();
-            if (PackageManagerHelper.isAppSuspended(appInfo)) {
-                info.runtimeStatusFlags |= ShortcutInfo.FLAG_DISABLED_SUSPENDED;
-            }
-            info.runtimeStatusFlags |= (appInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0
-                    ? FLAG_SYSTEM_NO : FLAG_SYSTEM_YES;
+            AppInfo.updateRuntimeFlagsForActivityTarget(info, lai);
         }
 
         // from the db
diff --git a/src/com/android/launcher3/model/LoaderTask.java b/src/com/android/launcher3/model/LoaderTask.java
index c2cfebb..310416f 100644
--- a/src/com/android/launcher3/model/LoaderTask.java
+++ b/src/com/android/launcher3/model/LoaderTask.java
@@ -25,6 +25,7 @@
 import android.content.pm.LauncherActivityInfo;
 import android.content.pm.PackageInstaller;
 import android.graphics.Bitmap;
+import android.graphics.drawable.AdaptiveIconDrawable;
 import android.os.Handler;
 import android.os.Process;
 import android.os.UserHandle;
@@ -35,6 +36,7 @@
 
 import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
+import com.android.launcher3.ClickShadowView;
 import com.android.launcher3.FolderInfo;
 import com.android.launcher3.IconCache;
 import com.android.launcher3.InstallShortcutReceiver;
@@ -52,6 +54,7 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.Folder;
 import com.android.launcher3.folder.FolderIconPreviewVerifier;
+import com.android.launcher3.graphics.IconNormalizer;
 import com.android.launcher3.graphics.LauncherIcons;
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.provider.ImportDataTask;
@@ -145,7 +148,9 @@
 
         TraceHelper.beginSection(TAG);
         try (LauncherModel.LoaderTransaction transaction = mApp.getModel().beginLoader(this)) {
-            TraceHelper.partitionSection(TAG, "step 1.1: loading workspace");
+            TraceHelper.partitionSection(TAG, "step 1.1: loading UI resources");
+            loadUiResources();
+            TraceHelper.partitionSection(TAG, "step 1.2: loading workspace");
             loadWorkspace();
 
             verifyNotStopped();
@@ -208,6 +213,14 @@
         this.notify();
     }
 
+    public void loadUiResources() {
+        if (Utilities.ATLEAST_OREO) {
+            ClickShadowView.setAdaptiveIconScaleFactor(
+                    IconNormalizer.getInstance(mApp.getContext()).getScale(
+                            new AdaptiveIconDrawable(null, null), null, null, null));
+        }
+    }
+
     private void loadWorkspace() {
         final Context context = mApp.getContext();
         final ContentResolver contentResolver = context.getContentResolver();