Loading high resolution icons for first 3 items in a folder

> Sometimes a folder gets rearranged, without updating the model,
   like when an app in uninstalled. In that case, we need to update
   the icons for folder items, which were previously hidden

Bug: 22813360
Change-Id: I99754911c969bf2153efb2948c226c1c69219b88

src/com/android/launcher3/BubbleTextView.java

@@ -34,11 +34,13 @@ import android.util.SparseArray;
 import android.util.TypedValue;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
+import android.view.View;
 import android.view.ViewConfiguration;
 import android.view.ViewParent;
 import android.view.animation.AccelerateInterpolator;
 import android.view.animation.DecelerateInterpolator;
 import android.widget.TextView;
+
 import com.android.launcher3.IconCache.IconLoadRequest;
 import com.android.launcher3.model.PackageItemInfo;
 
@@ -538,6 +540,13 @@ public class BubbleTextView extends TextView
             } else if (info instanceof ShortcutInfo) {
                 applyFromShortcutInfo((ShortcutInfo) info,
                         LauncherAppState.getInstance().getIconCache());
+                if ((info.rank < FolderIcon.NUM_ITEMS_IN_PREVIEW) && (info.container >= 0)) {
+                    View folderIcon =
+                            mLauncher.getWorkspace().getHomescreenIconByItemId(info.container);
+                    if (folderIcon != null) {
+                        folderIcon.invalidate();
+                    }
+                }
             } else if (info instanceof PackageItemInfo) {
                 applyFromPackageItemInfo((PackageItemInfo) info);
             }

src/com/android/launcher3/Folder.java

@@ -1389,7 +1389,7 @@ public class Folder extends LinearLayout implements DragSource, View.OnClickList
     }
 
     // Compares item position based on rank and position giving priority to the rank.
-    private static final Comparator<ItemInfo> ITEM_POS_COMPARATOR = new Comparator<ItemInfo>() {
+    public static final Comparator<ItemInfo> ITEM_POS_COMPARATOR = new Comparator<ItemInfo>() {
 
         @Override
         public int compare(ItemInfo lhs, ItemInfo rhs) {

src/com/android/launcher3/FolderPagedView.java

@@ -329,6 +329,10 @@ public class FolderPagedView extends PagedView {
                 lp.cellY = info.cellY;
                 currentPage.addViewToCellLayout(
                         v, -1, mFolder.mLauncher.getViewIdForItem(info), lp, true);
+
+                if (rank < FolderIcon.NUM_ITEMS_IN_PREVIEW && v instanceof BubbleTextView) {
+                    ((BubbleTextView) v).verifyHighRes();
+                }
             }
 
             rank ++;

src/com/android/launcher3/Launcher.java

@@ -2662,6 +2662,7 @@ public class Launcher extends Activity
             throw new IllegalArgumentException("Input must be a FolderIcon");
         }
 
+        // TODO(sunnygoyal): Re-evaluate this code.
         FolderIcon folderIcon = (FolderIcon) v;
         final FolderInfo info = folderIcon.getFolderInfo();
         Folder openFolder = mWorkspace.getFolderForTag(info);

src/com/android/launcher3/LauncherModel.java

@@ -2303,6 +2303,21 @@ public class LauncherModel extends BroadcastReceiver
                     }
                 }
 
+                // Sort all the folder items and make sure the first 3 items are high resolution.
+                for (FolderInfo folder : sBgFolders) {
+                    Collections.sort(folder.contents, Folder.ITEM_POS_COMPARATOR);
+                    int pos = 0;
+                    for (ShortcutInfo info : folder.contents) {
+                        if (info.usingLowResIcon) {
+                            info.updateIcon(mIconCache, false);
+                        }
+                        pos ++;
+                        if (pos >= FolderIcon.NUM_ITEMS_IN_PREVIEW) {
+                            break;
+                        }
+                    }
+                }
+
                 if (restoredRows.size() > 0) {
                     // Update restored items that no longer require special handling
                     ContentValues values = new ContentValues();

src/com/android/launcher3/ShortcutInfo.java

@@ -198,13 +198,17 @@ public class ShortcutInfo extends ItemInfo {
         return mIcon;
     }
 
-    public void updateIcon(IconCache iconCache) {
+    public void updateIcon(IconCache iconCache, boolean useLowRes) {
         if (itemType == Favorites.ITEM_TYPE_APPLICATION) {
             iconCache.getTitleAndIcon(this, promisedIntent != null ? promisedIntent : intent, user,
-                    shouldUseLowResIcon());
+                    useLowRes);
         }
     }
 
+    public void updateIcon(IconCache iconCache) {
+        updateIcon(iconCache, shouldUseLowResIcon());
+    }
+
     @Override
     void onAddToDatabase(Context context, ContentValues values) {
         super.onAddToDatabase(context, values);

src/com/android/launcher3/Workspace.java

@@ -4059,6 +4059,16 @@ public class Workspace extends PagedView
         });
     }
 
+    public View getHomescreenIconByItemId(final long id) {
+        return getFirstMatch(new ItemOperator() {
+
+            @Override
+            public boolean evaluate(ItemInfo info, View v, View parent) {
+                return info.id == id;
+            }
+        });
+    }
+
     public View getViewForTag(final Object tag) {
         return getFirstMatch(new ItemOperator() {