Merge "Fix right-bottom corner edge to curve in PS container." into main
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index 1782791..3e55f61 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -22,6 +22,7 @@
 import android.content.Context;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import androidx.recyclerview.widget.DiffUtil;
 
 import com.android.launcher3.Flags;
@@ -338,26 +339,14 @@
             hasPrivateApps = appList.stream().
                     allMatch(mPrivateProviderManager.getItemInfoMatcher());
         }
-        int privateAppCount = 0;
-        int numberOfColumns = mActivityContext.getDeviceProfile().numShownAllAppsColumns;
-        int numberOfAppRows = (int) Math.ceil((double) appList.size() / numberOfColumns);
-        for (AppInfo info : appList) {
+        for (int i = 0; i < appList.size(); i++) {
+            AppInfo info = appList.get(i);
             // Apply decorator to private apps.
             if (hasPrivateApps) {
-                int roundRegion = ROUND_NOTHING;
-                if ((privateAppCount / numberOfColumns) == numberOfAppRows - 1) {
-                    if ((privateAppCount % numberOfColumns) == 0) {
-                        // App is the first column
-                        roundRegion = ROUND_BOTTOM_LEFT;
-                    } else if ((privateAppCount % numberOfColumns) == numberOfColumns-1) {
-                        roundRegion = ROUND_BOTTOM_RIGHT;
-                    }
-                }
                 mAdapterItems.add(AdapterItem.asAppWithDecorationInfo(info,
                         new SectionDecorationInfo(mActivityContext.getApplicationContext(),
-                                roundRegion,
+                                getRoundRegions(i, appList.size()),
                                 true /* decorateTogether */)));
-                privateAppCount += 1;
             } else {
                 mAdapterItems.add(AdapterItem.asApp(info));
             }
@@ -372,6 +361,43 @@
         }
     }
 
+    /**
+     * Determines the corner regions that should be rounded for a specific app icon based on its
+     * position in a grid. Apps that should only be cared about rounding are the apps in the last
+     * row. In the last row on the first column, the app should only be rounded on the bottom left.
+     * Apps in the middle would not be rounded and the last app on the last row will ALWAYS have a
+     * {@link SectionDecorationInfo#ROUND_BOTTOM_RIGHT}.
+     *
+     * @param appIndex The index of the app icon within the app list.
+     * @param appListSize The total number of apps within the app list.
+     * @return  An integer representing the corner regions to be rounded, using bitwise flags:
+     *          - {@link SectionDecorationInfo#ROUND_NOTHING}: No corners should be rounded.
+     *          - {@link SectionDecorationInfo#ROUND_TOP_LEFT}: Round the top-left corner.
+     *          - {@link SectionDecorationInfo#ROUND_TOP_RIGHT}: Round the top-right corner.
+     *          - {@link SectionDecorationInfo#ROUND_BOTTOM_LEFT}: Round the bottom-left corner.
+     *          - {@link SectionDecorationInfo#ROUND_BOTTOM_RIGHT}: Round the bottom-right corner.
+     */
+    @VisibleForTesting
+    int getRoundRegions(int appIndex, int appListSize) {
+        int numberOfAppRows = (int) Math.ceil((double) appListSize / mNumAppsPerRowAllApps);
+        int roundRegion = ROUND_NOTHING;
+        // App is in the last row.
+        if ((appIndex / mNumAppsPerRowAllApps) == numberOfAppRows - 1) {
+            if ((appIndex % mNumAppsPerRowAllApps) == 0) {
+                // App is the first column.
+                roundRegion = ROUND_BOTTOM_LEFT;
+            } else if ((appIndex % mNumAppsPerRowAllApps) == mNumAppsPerRowAllApps-1) {
+                // App is in the last column.
+                roundRegion = ROUND_BOTTOM_RIGHT;
+            }
+            // Ensure the last private app is rounded on the bottom right.
+            if (appIndex == appListSize - 1) {
+                roundRegion |= ROUND_BOTTOM_RIGHT;
+            }
+        }
+        return roundRegion;
+    }
+
     private static class MyDiffCallback extends DiffUtil.Callback {
 
         private final List<AdapterItem> mOldList;
diff --git a/src/com/android/launcher3/allapps/SectionDecorationInfo.java b/src/com/android/launcher3/allapps/SectionDecorationInfo.java
index 1fed2b6..c438d19 100644
--- a/src/com/android/launcher3/allapps/SectionDecorationInfo.java
+++ b/src/com/android/launcher3/allapps/SectionDecorationInfo.java
@@ -22,11 +22,11 @@
 
 public class SectionDecorationInfo {
 
-    public static final int ROUND_NOTHING = 1 << 1;
-    public static final int ROUND_TOP_LEFT = 1 << 2;
-    public static final int ROUND_TOP_RIGHT = 1 << 3;
-    public static final int ROUND_BOTTOM_LEFT = 1 << 4;
-    public static final int ROUND_BOTTOM_RIGHT = 1 << 5;
+    public static final int ROUND_NOTHING = 0;
+    public static final int ROUND_TOP_LEFT = 1 << 1;
+    public static final int ROUND_TOP_RIGHT = 1 << 2;
+    public static final int ROUND_BOTTOM_LEFT = 1 << 3;
+    public static final int ROUND_BOTTOM_RIGHT = 1 << 4;
     public static final int DECORATOR_ALPHA = 255;
 
     protected boolean mShouldDecorateItemsTogether;
diff --git a/tests/src/com/android/launcher3/allapps/AlphabeticalAppsListTest.java b/tests/src/com/android/launcher3/allapps/AlphabeticalAppsListTest.java
index 259f519..3068785 100644
--- a/tests/src/com/android/launcher3/allapps/AlphabeticalAppsListTest.java
+++ b/tests/src/com/android/launcher3/allapps/AlphabeticalAppsListTest.java
@@ -19,6 +19,9 @@
 import static androidx.test.core.app.ApplicationProvider.getApplicationContext;
 
 import static com.android.launcher3.allapps.BaseAllAppsAdapter.VIEW_TYPE_PRIVATE_SPACE_HEADER;
+import static com.android.launcher3.allapps.SectionDecorationInfo.ROUND_BOTTOM_LEFT;
+import static com.android.launcher3.allapps.SectionDecorationInfo.ROUND_BOTTOM_RIGHT;
+import static com.android.launcher3.allapps.SectionDecorationInfo.ROUND_NOTHING;
 import static com.android.launcher3.allapps.UserProfileManager.STATE_DISABLED;
 import static com.android.launcher3.allapps.UserProfileManager.STATE_ENABLED;
 import static com.android.launcher3.allapps.UserProfileManager.STATE_TRANSITION;
@@ -61,6 +64,8 @@
     private static final int PRIVATE_SPACE_HEADER_ITEM_COUNT = 1;
     private static final int MAIN_USER_APP_COUNT = 2;
     private static final int PRIVATE_USER_APP_COUNT = 1;
+    private static final int NUM_APP_COLS = 4;
+    private static final int NUM_APP_ROWS = 3;
 
     private AlphabeticalAppsList<?> mAlphabeticalAppsList;
     @Mock
@@ -81,6 +86,7 @@
                 info != null && info.user.equals(PRIVATE_HANDLE));
         mAlphabeticalAppsList = new AlphabeticalAppsList<>(mContext, mAllAppsStore,
                 null, mPrivateProfileManager);
+        mAlphabeticalAppsList.setNumAppsPerRowAllApps(NUM_APP_COLS);
     }
 
     @Test
@@ -182,6 +188,94 @@
                 .toList().size());
     }
 
+    @Test
+    public void getRoundRegions_whenIndexIsMiddleOfLastRow_roundNothing() {
+        int index = 3;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_NOTHING, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInEndOfLastRow_roundBottomRight() {
+        int index = 11;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_BOTTOM_RIGHT, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInBeginningOfLastRow_roundBottomLeft() {
+        int index = 8;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_BOTTOM_LEFT, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInMiddleOfLastRow_roundNothing() {
+        int index = 9;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_NOTHING, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInMiddleRow_roundNothing() {
+        int index = 5;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_NOTHING, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInBeginningOfTopRow_roundNothing() {
+        int index = 0;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_NOTHING, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInLastOfTopRow_roundNothing() {
+        int index = 3;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index,
+                NUM_APP_COLS * NUM_APP_ROWS);
+
+        assertEquals(ROUND_NOTHING, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInMiddleOfLastRowLastItem_roundBottomRight() {
+        int index = 9;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index, index+1);
+
+        assertEquals(ROUND_BOTTOM_RIGHT, roundRegions);
+    }
+
+    @Test
+    public void getRoundRegions_whenIndexIsInBeginningOfLastRowLastItem_roundBottomRight() {
+        int index = 8;
+
+        int roundRegions = mAlphabeticalAppsList.getRoundRegions(index, index+1);
+
+        assertEquals(ROUND_BOTTOM_RIGHT | ROUND_BOTTOM_LEFT, roundRegions);
+    }
+
     private int addPrivateSpaceHeader(List<BaseAllAppsAdapter.AdapterItem> adapterItemList) {
         adapterItemList.add(new BaseAllAppsAdapter.AdapterItem(VIEW_TYPE_PRIVATE_SPACE_HEADER));
         return adapterItemList.size();