Fix qs rows count on foldables

Fixes: 255102159
Test: Manual on foldable device + autotest
Change-Id: I54243e2373fa6fac26886618173ef4c4b5a71a3a

packages/SystemUI/src/com/android/systemui/qs/PagedTileLayout.java

@@ -364,13 +364,18 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
     private void distributeTiles() {
         emptyAndInflateOrRemovePages();
 
-        final int tileCount = mPages.get(0).maxTiles();
-        if (DEBUG) Log.d(TAG, "Distributing tiles");
+        final int tilesPerPageCount = mPages.get(0).maxTiles();
         int index = 0;
-        final int NT = mTiles.size();
-        for (int i = 0; i < NT; i++) {
+        final int totalTilesCount = mTiles.size();
+        if (DEBUG) {
+            Log.d(TAG, "Distributing tiles: "
+                    + "[tilesPerPageCount=" + tilesPerPageCount + "]"
+                    + "[totalTilesCount=" + totalTilesCount + "]"
+            );
+        }
+        for (int i = 0; i < totalTilesCount; i++) {
             TileRecord tile = mTiles.get(i);
-            if (mPages.get(index).mRecords.size() == tileCount) index++;
+            if (mPages.get(index).mRecords.size() == tilesPerPageCount) index++;
             if (DEBUG) {
                 Log.d(TAG, "Adding " + tile.tile.getClass().getSimpleName() + " to "
                         + index);
@@ -577,8 +582,8 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
         });
         setOffscreenPageLimit(lastPageNumber); // Ensure the page to reveal has been inflated.
         int dx = getWidth() * lastPageNumber;
-        mScroller.startScroll(getScrollX(), getScrollY(), isLayoutRtl() ? -dx  : dx, 0,
-            REVEAL_SCROLL_DURATION_MILLIS);
+        mScroller.startScroll(getScrollX(), getScrollY(), isLayoutRtl() ? -dx : dx, 0,
+                REVEAL_SCROLL_DURATION_MILLIS);
         postInvalidateOnAnimation();
     }
 
@@ -738,6 +743,7 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
 
     public interface PageListener {
         int INVALID_PAGE = -1;
+
         void onPageChanged(boolean isFirst, int pageNumber);
     }
 }

packages/SystemUI/src/com/android/systemui/qs/TileLayout.java

@@ -123,7 +123,6 @@ public class TileLayout extends ViewGroup implements QSTileLayout {
     public boolean updateResources() {
         final Resources res = mContext.getResources();
         mResourceColumns = Math.max(1, res.getInteger(R.integer.quick_settings_num_columns));
-        updateColumns();
         mMaxCellHeight = mContext.getResources().getDimensionPixelSize(mCellHeightResId);
         mCellMarginHorizontal = res.getDimensionPixelSize(R.dimen.qs_tile_margin_horizontal);
         mSidePadding = useSidePadding() ? mCellMarginHorizontal / 2 : 0;

packages/SystemUI/tests/src/com/android/systemui/qs/TileLayoutTest.java

@@ -27,6 +27,8 @@ import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
+import android.content.Context;
+import android.content.res.Resources;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.view.accessibility.AccessibilityNodeInfo;
 
@@ -42,16 +44,22 @@ import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.ArgumentCaptor;
+import org.mockito.Mockito;
 
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class TileLayoutTest extends SysuiTestCase {
-    private TileLayout mTileLayout;
+    private Resources mResources;
     private int mLayoutSizeForOneTile;
+    private TileLayout mTileLayout; // under test
 
     @Before
     public void setUp() throws Exception {
-        mTileLayout = new TileLayout(mContext);
+        Context context = Mockito.spy(mContext);
+        mResources = Mockito.spy(context.getResources());
+        Mockito.when(mContext.getResources()).thenReturn(mResources);
+
+        mTileLayout = new TileLayout(context);
         // Layout needs to leave space for the tile margins. Three times the margin size is
         // sufficient for any number of columns.
         mLayoutSizeForOneTile =
@@ -203,4 +211,21 @@ public class TileLayoutTest extends SysuiTestCase {
         verify(tileRecord1.tileView).setPosition(0);
         verify(tileRecord2.tileView).setPosition(1);
     }
+
+    @Test
+    public void resourcesChanged_updateResources_returnsTrue() {
+        Mockito.when(mResources.getInteger(R.integer.quick_settings_num_columns)).thenReturn(1);
+        mTileLayout.updateResources(); // setup with 1
+        Mockito.when(mResources.getInteger(R.integer.quick_settings_num_columns)).thenReturn(2);
+
+        assertEquals(true, mTileLayout.updateResources());
+    }
+
+    @Test
+    public void resourcesSame_updateResources_returnsFalse() {
+        Mockito.when(mResources.getInteger(R.integer.quick_settings_num_columns)).thenReturn(1);
+        mTileLayout.updateResources(); // setup with 1
+
+        assertEquals(false, mTileLayout.updateResources());
+    }
 }