Add implementation of homepage swipe to dismiss.

- Only enable swipe for slice full/half card.
- Add isPendingDismiss in ContextualCard to determine if we should show
dismissal view.
- Take out long press feature.

Bug: 126214056
Test: robotests
Change-Id: Ib03e605347b2f50d3c62fcd4f95875a21cc9ef1c

src/com/android/settings/homepage/contextualcards/ContextualCard.java

@@ -71,6 +71,7 @@ public class ContextualCard {
     private final Drawable mIconDrawable;
     @LayoutRes
     private final int mViewType;
+    private final boolean mIsPendingDismiss;
 
     public String getName() {
         return mName;
@@ -156,6 +157,10 @@ public class ContextualCard {
         return mViewType;
     }
 
+    public boolean isPendingDismiss() {
+        return mIsPendingDismiss;
+    }
+
     public Builder mutate() {
         return mBuilder;
     }
@@ -181,6 +186,7 @@ public class ContextualCard {
         mIconDrawable = builder.mIconDrawable;
         mIsLargeCard = builder.mIsLargeCard;
         mViewType = builder.mViewType;
+        mIsPendingDismiss = builder.mIsPendingDismiss;
     }
 
     ContextualCard(Cursor c) {
@@ -226,6 +232,8 @@ public class ContextualCard {
         mBuilder.setIconDrawable(mIconDrawable);
         mViewType = getViewTypeByCardType(mCardType);
         mBuilder.setViewType(mViewType);
+        mIsPendingDismiss = false;
+        mBuilder.setIsPendingDismiss(mIsPendingDismiss);
     }
 
     @Override
@@ -277,6 +285,7 @@ public class ContextualCard {
         private boolean mIsLargeCard;
         @LayoutRes
         private int mViewType;
+        private boolean mIsPendingDismiss;
 
         public Builder setName(String name) {
             mName = name;
@@ -373,6 +382,11 @@ public class ContextualCard {
             return this;
         }
 
+        public Builder setIsPendingDismiss(boolean isPendingDismiss) {
+            mIsPendingDismiss = isPendingDismiss;
+            return this;
+        }
+
         public ContextualCard build() {
             return new ContextualCard(this);
         }

src/com/android/settings/homepage/contextualcards/ContextualCardsAdapter.java

@@ -28,7 +28,7 @@ import androidx.recyclerview.widget.GridLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.homepage.contextualcards.conditional.ConditionContextualCardRenderer;
-import com.android.settings.homepage.contextualcards.slices.SwipeDismissalDelegate.DismissalItemTouchHelperListener;
+import com.android.settings.homepage.contextualcards.slices.SwipeDismissalDelegate;
 import com.android.settings.homepage.contextualcards.slices.SliceContextualCardRenderer;
 
 import java.util.ArrayList;
@@ -36,7 +36,7 @@ import java.util.List;
 import java.util.Map;
 
 public class ContextualCardsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
-        implements ContextualCardUpdateListener, DismissalItemTouchHelperListener {
+        implements ContextualCardUpdateListener, SwipeDismissalDelegate.Listener {
     static final int SPAN_COUNT = 2;
 
     private static final String TAG = "ContextualCardsAdapter";
@@ -140,6 +140,9 @@ public class ContextualCardsAdapter extends RecyclerView.Adapter<RecyclerView.Vi
 
     @Override
     public void onSwiped(int position) {
-
+        final ContextualCard card = mContextualCards.get(position).mutate()
+                .setIsPendingDismiss(true).build();
+        mContextualCards.set(position, card);
+        notifyItemChanged(position);
     }
 }

src/com/android/settings/homepage/contextualcards/slices/SliceContextualCardRenderer.java

@@ -135,23 +135,19 @@ public class SliceContextualCardRenderer implements ContextualCardRenderer, Life
                 // Deferred setup is never dismissible.
                 break;
             case VIEW_TYPE_HALF_WIDTH:
-                initDismissalActions(holder, card, R.id.content);
+                initDismissalActions(holder, card);
                 break;
             default:
-                initDismissalActions(holder, card, R.id.slice_view);
+                initDismissalActions(holder, card);
+        }
+
+        if (card.isPendingDismiss()) {
+            flipCardToDismissalView(holder);
+            mFlippedCardSet.add(holder);
         }
     }
 
-    private void initDismissalActions(RecyclerView.ViewHolder holder, ContextualCard card,
-            int initialViewId) {
-        // initialView is the first view in the ViewFlipper.
-        final View initialView = holder.itemView.findViewById(initialViewId);
-        initialView.setOnLongClickListener(v -> {
-            flipCardToDismissalView(holder);
-            mFlippedCardSet.add(holder);
-            return true;
-        });
-
+    private void initDismissalActions(RecyclerView.ViewHolder holder, ContextualCard card) {
         final Button btnKeep = holder.itemView.findViewById(R.id.keep);
         btnKeep.setOnClickListener(v -> {
             mFlippedCardSet.remove(holder);

src/com/android/settings/homepage/contextualcards/slices/SwipeDismissalDelegate.java

@@ -18,31 +18,62 @@ package com.android.settings.homepage.contextualcards.slices;
 
 import android.content.Context;
 import android.graphics.Canvas;
+import android.widget.ViewFlipper;
 
 import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.android.settings.R;
+import com.android.settings.homepage.contextualcards.ContextualCard;
+
 public class SwipeDismissalDelegate extends ItemTouchHelper.Callback {
 
     private static final String TAG = "DismissItemTouchHelper";
 
-    public interface DismissalItemTouchHelperListener {
+    public interface Listener {
         void onSwiped(int position);
     }
 
     private final Context mContext;
-    private final DismissalItemTouchHelperListener mListener;
+    private final SwipeDismissalDelegate.Listener mListener;
 
-    public SwipeDismissalDelegate(Context context, DismissalItemTouchHelperListener listener) {
+    public SwipeDismissalDelegate(Context context, SwipeDismissalDelegate.Listener listener) {
         mContext = context;
         mListener = listener;
     }
 
+    /**
+     * Determine whether the ability to drag or swipe should be enabled or not.
+     *
+     * Only allow swipe on {@link ContextualCard} built with view type
+     * {@link SliceContextualCardRenderer#VIEW_TYPE_FULL_WIDTH} or
+     * {@link SliceContextualCardRenderer#VIEW_TYPE_HALF_WIDTH}.
+     *
+     * When the dismissal view is displayed, the swipe will also be disabled.
+     */
     @Override
     public int getMovementFlags(@NonNull RecyclerView recyclerView,
             @NonNull RecyclerView.ViewHolder viewHolder) {
-        return 0;
+        switch (viewHolder.getItemViewType()) {
+            case SliceContextualCardRenderer.VIEW_TYPE_FULL_WIDTH:
+            case SliceContextualCardRenderer.VIEW_TYPE_HALF_WIDTH:
+                //TODO(b/129438972): Convert this to a regular view.
+                final ViewFlipper viewFlipper = viewHolder.itemView.findViewById(R.id.view_flipper);
+
+                // As we are using ViewFlipper to switch between the initial view and
+                // dismissal view, here we are making sure the current displayed view is the
+                // initial view of either slice full card or half card, and only allow swipe on
+                // these two types.
+                if (viewFlipper.getCurrentView().getId() != getInitialViewId(viewHolder)) {
+                    // Disable swiping when we are in the dismissal view
+                    return 0;
+                }
+                return makeMovementFlags(0 /*dragFlags*/,
+                        ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT /*swipeFlags*/);
+            default:
+                return 0;
+        }
     }
 
     @Override
@@ -63,4 +94,11 @@ public class SwipeDismissalDelegate extends ItemTouchHelper.Callback {
             boolean isCurrentlyActive) {
         super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
     }
+
+    private int getInitialViewId(RecyclerView.ViewHolder viewHolder) {
+        if (viewHolder.getItemViewType() == SliceContextualCardRenderer.VIEW_TYPE_HALF_WIDTH) {
+            return R.id.content;
+        }
+        return R.id.slice_view;
+    }
 }