Clean up QS/NSSL bottom margin calculation

The root cause of b/222594381 was a deviation between the two mostly
repetitive branches of an if-else.

This change factors out the not-repetitive part of those two branches
into a top-level case, and then merges the rest of the cases between the
two branches.

It also removes the default value for stackScrollMargin, since that
saves a couple lines of code but makes the resulting outputs harder to
discern by eye.

Also, spell out some wildcard imports to make ktlint happy.

Bug: 222594381
Test: manual, on Pixel 5a
Change-Id: I6a034a6fb475be363667cb64ab2b3516a8df6005

1 files changed, 21 insertions, 27 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/shade/NotificationsQSContainerController.kt b/packages/SystemUI/src/com/android/systemui/shade/NotificationsQSContainerController.kt
index 13a5615a8b54..2a467763951c 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/NotificationsQSContainerController.kt
+++ b/packages/SystemUI/src/com/android/systemui/shade/NotificationsQSContainerController.kt
@@ -6,7 +6,11 @@ import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
 import android.view.WindowInsets
 import androidx.annotation.VisibleForTesting
 import androidx.constraintlayout.widget.ConstraintSet
-import androidx.constraintlayout.widget.ConstraintSet.*
+import androidx.constraintlayout.widget.ConstraintSet.BOTTOM
+import androidx.constraintlayout.widget.ConstraintSet.END
+import androidx.constraintlayout.widget.ConstraintSet.PARENT_ID
+import androidx.constraintlayout.widget.ConstraintSet.START
+import androidx.constraintlayout.widget.ConstraintSet.TOP
 import com.android.systemui.R
 import com.android.systemui.dagger.qualifiers.Main
 import com.android.systemui.flags.FeatureFlags
@@ -171,33 +175,23 @@ class NotificationsQSContainerController @Inject constructor(
 
     private fun calculateBottomSpacing(): Paddings {
         val containerPadding: Int
-        var stackScrollMargin = notificationsBottomMargin
-        if (splitShadeEnabled) {
-            if (isGestureNavigation) {
-                // only default cutout padding, taskbar always hides
-                containerPadding = bottomCutoutInsets
-            } else if (taskbarVisible) {
-                // navigation buttons + visible taskbar means we're NOT on homescreen
-                containerPadding = bottomStableInsets
-            } else {
-                // navigation buttons + hidden taskbar means we're on homescreen
-                containerPadding = 0
-                // we need extra margin for notifications as navigation buttons are below them
-                stackScrollMargin = bottomStableInsets + notificationsBottomMargin
-            }
+        val stackScrollMargin: Int
+        if (!splitShadeEnabled && (isQSCustomizing || isQSDetailShowing)) {
+            // Clear out bottom paddings/margins so the qs customization can be full height.
+            containerPadding = 0
+            stackScrollMargin = 0
+        } else if (isGestureNavigation) {
+            // only default cutout padding, taskbar always hides
+            containerPadding = bottomCutoutInsets
+            stackScrollMargin = notificationsBottomMargin
+        } else if (taskbarVisible) {
+            // navigation buttons + visible taskbar means we're NOT on homescreen
+            containerPadding = bottomStableInsets
+            stackScrollMargin = notificationsBottomMargin
         } else {
-            if (isQSCustomizing || isQSDetailShowing) {
-                // Clear out bottom paddings/margins so the qs customization can be full height.
-                containerPadding = 0
-                stackScrollMargin = 0
-            } else if (isGestureNavigation) {
-                containerPadding = bottomCutoutInsets
-            } else if (taskbarVisible) {
-                containerPadding = bottomStableInsets
-            } else {
-                containerPadding = 0
-                stackScrollMargin = bottomStableInsets + notificationsBottomMargin
-            }
+            // navigation buttons + hidden taskbar means we're on homescreen
+            containerPadding = 0
+            stackScrollMargin = bottomStableInsets + notificationsBottomMargin
         }
         val qsContainerPadding = if (!(isQSCustomizing || isQSDetailShowing)) {
             // We also want this padding in the bottom in these cases