Brighten theme-icons when in Dark mode and add dark color for taskbar

Bug: 217247494
Test: change between dark and light mode and transition in and out of apps
Change-Id: Ia5e38d674a56eb95a48cb1e8c2688586594a69f9

quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java

@@ -27,6 +27,7 @@ import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.core.graphics.ColorUtils;
 import androidx.core.view.OneShotPreDrawListener;
 
 import com.android.launcher3.BubbleTextView;
@@ -37,6 +38,7 @@ import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.FolderIcon;
+import com.android.launcher3.icons.ThemedIconDrawable;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.LauncherBindableItemsContainer;
@@ -71,6 +73,9 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
             this::updateTranslationY);
     private AnimatedFloat mTaskbarNavButtonTranslationY;
 
+    private final AnimatedFloat mThemeIconsBackground = new AnimatedFloat(
+            this::updateIconsBackground);
+
     private final TaskbarModelCallbacks mModelCallbacks;
 
     // Initialized in init.
@@ -81,6 +86,8 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
     private AnimatorPlaybackController mIconAlignControllerLazy = null;
     private Runnable mOnControllerPreCreateCallback = NO_OP;
 
+    private int mThemeIconsColor;
+
     public TaskbarViewController(TaskbarActivityContext activity, TaskbarView taskbarView) {
         mActivity = activity;
         mTaskbarView = taskbarView;
@@ -93,6 +100,7 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
         mControllers = controllers;
         mTaskbarView.init(new TaskbarViewCallbacks());
         mTaskbarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarSize;
+        mThemeIconsColor = ThemedIconDrawable.getColors(mTaskbarView.getContext())[0];
 
         mTaskbarIconScaleForStash.updateValue(1f);
 
@@ -182,6 +190,15 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
                 + mTaskbarIconTranslationYForStash.value);
     }
 
+    private void updateIconsBackground() {
+        mTaskbarView.setThemedIconsBackgroundColor(
+                ColorUtils.blendARGB(
+                        mThemeIconsColor,
+                        mTaskbarView.mThemeIconsBackground,
+                        mThemeIconsBackground.value
+                ));
+    }
+
     /**
      * Sets the taskbar icon alignment relative to Launcher hotseat icons
      * @param alignmentRatio [0, 1]
@@ -217,6 +234,10 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
         setter.setFloat(mTaskbarIconTranslationYForHome, VALUE, -offsetY, LINEAR);
         setter.setFloat(mTaskbarNavButtonTranslationY, VALUE, -offsetY, LINEAR);
 
+        if (Utilities.isDarkTheme(mTaskbarView.getContext())) {
+            setter.addFloat(mThemeIconsBackground, VALUE, 0f, 1f, LINEAR);
+        }
+
         int collapsedHeight = mActivity.getDefaultTaskbarWindowHeight();
         int expandedHeight = Math.max(collapsedHeight,
                 mActivity.getDeviceProfile().taskbarSize + offsetY);