Fix getWidgetItemSizePx estimation

The size returned by getWidgetItemSizePx is used by the widget picker
for the NavigableAppWidgetHostView. We should NOT deduct the padding
applied to NavigableAppWidgetHostView to this size.

If a launcher grid insets NavigableAppWidgetHostView, then we must
add the inset to the NavigableAppWidgetHostView width / height.

Test: Compare the size of widgets in preview and home screen using
      layout inspector. See screenshots in the bug
Fix: 200983939
Change-Id: I35022861b65f2624f69940cf3856d9c47f8dbbd9
diff --git a/src/com/android/launcher3/widget/util/WidgetSizes.java b/src/com/android/launcher3/widget/util/WidgetSizes.java
index 451ed6e..b211f4c 100644
--- a/src/com/android/launcher3/widget/util/WidgetSizes.java
+++ b/src/com/android/launcher3/widget/util/WidgetSizes.java
@@ -17,7 +17,6 @@
 
 import static android.appwidget.AppWidgetHostView.getDefaultPaddingForWidget;
 
-
 import android.appwidget.AppWidgetHostView;
 import android.appwidget.AppWidgetManager;
 import android.content.ComponentName;
@@ -87,7 +86,13 @@
     }
 
     /**
-     * Returns the size of a WidgetItem.
+     * Returns the size of a {@link WidgetItem}.
+     *
+     * <p>This size is used by the widget picker. It should NEVER be shared with app widgets.
+     *
+     * <p>For sizes shared with app widgets, please refer to
+     * {@link #getWidgetPaddedSizes(Context, ComponentName, int, int)} &
+     * {@link #getWidgetPaddedSizePx(Context, ComponentName, DeviceProfile, int, int)}.
      */
     public static Size getWidgetItemSizePx(Context context, DeviceProfile profile,
             WidgetItem widgetItem) {
@@ -96,8 +101,15 @@
                     .getDimensionPixelSize(R.dimen.widget_preview_shortcut_padding);
             return new Size(dimension, dimension);
         }
-        return getWidgetPaddedSizePx(context, widgetItem.componentName, profile, widgetItem.spanX,
-                widgetItem.spanY);
+        Size widgetItemSize = getWidgetSizePx(profile, widgetItem.spanX,
+                widgetItem.spanY, /* recycledCellSize= */ null);
+        if (profile.shouldInsetWidgets()) {
+            Rect inset = new Rect();
+            AppWidgetHostView.getDefaultPaddingForWidget(context, widgetItem.componentName, inset);
+            return new Size(widgetItemSize.getWidth() + inset.left + inset.right,
+                    widgetItemSize.getHeight() + inset.top + inset.bottom);
+        }
+        return widgetItemSize;
     }
 
     private static Size getWidgetSizePx(DeviceProfile profile, int spanX, int spanY,