Hide hotseat when bubble bar is expanded.

Added logic to stash the hotseat when on launcher home screen.

Bug: 280494203
Test: Manual:
http://recall/-/gx8ASgewUeUS3QYohfrd1J/fjfjUw296LRXUm9uYqXU4K
all tests in com.android.launcher3.taskbar
Flag: com.android.wm.shell.enable_bubble_bar

Change-Id: I67b298831eaed9c549a2fae7dc5a0d9fae51f7c4
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index 0d4ebe0..024dde4 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -33,15 +33,34 @@
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
+import androidx.annotation.IntDef;
+
 import com.android.launcher3.util.HorizontalInsettableView;
+import com.android.launcher3.util.MultiPropertyFactory.MultiProperty;
 import com.android.launcher3.util.MultiTranslateDelegate;
+import com.android.launcher3.util.MultiValueAlpha;
 import com.android.launcher3.views.ActivityContext;
 
+import java.io.PrintWriter;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * View class that represents the bottom row of the home screen.
  */
 public class Hotseat extends CellLayout implements Insettable {
 
+    public static final int ALPHA_CHANNEL_TASKBAR_ALIGNMENT = 0;
+    public static final int ALPHA_CHANNEL_PREVIEW_RENDERER = 1;
+    public static final int ALPHA_CHANNEL_TASKBAR_STASH = 2;
+    public static final int ALPHA_CHANNEL_CHANNELS_COUNT = 3;
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @IntDef({ALPHA_CHANNEL_TASKBAR_ALIGNMENT, ALPHA_CHANNEL_PREVIEW_RENDERER,
+            ALPHA_CHANNEL_TASKBAR_STASH})
+    public @interface HotseatQsbAlphaId {
+    }
+
     // Ratio of empty space, qsb should take up to appear visually centered.
     public static final float QSB_CENTER_FACTOR = .325f;
     private static final int BUBBLE_BAR_ADJUSTMENT_ANIMATION_DURATION_MS = 250;
@@ -50,6 +69,8 @@
     private boolean mHasVerticalHotseat;
     private Workspace<?> mWorkspace;
     private boolean mSendTouchToWorkspace;
+    private final MultiValueAlpha mIconsAlphaChannels;
+    private final MultiValueAlpha mQsbAlphaChannels;
 
     private final View mQsb;
 
@@ -63,9 +84,11 @@
 
     public Hotseat(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
-
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
         addView(mQsb);
+        mIconsAlphaChannels = new MultiValueAlpha(getShortcutsAndWidgets(),
+                ALPHA_CHANNEL_CHANNELS_COUNT);
+        mQsbAlphaChannels = new MultiValueAlpha(mQsb, ALPHA_CHANNEL_CHANNELS_COUNT);
     }
 
     /**
@@ -270,21 +293,27 @@
     }
 
     /**
-     * Sets the alpha value of just our ShortcutAndWidgetContainer.
+     * Sets the alpha value of the specified alpha channel of just our ShortcutAndWidgetContainer.
      */
-    public void setIconsAlpha(float alpha) {
-        getShortcutsAndWidgets().setAlpha(alpha);
+    public void setIconsAlpha(float alpha, @HotseatQsbAlphaId int channelId) {
+        getIconsAlpha(channelId).setValue(alpha);
     }
 
     /**
      * Sets the alpha value of just our QSB.
      */
-    public void setQsbAlpha(float alpha) {
-        mQsb.setAlpha(alpha);
+    public void setQsbAlpha(float alpha, @HotseatQsbAlphaId int channelId) {
+        getQsbAlpha(channelId).setValue(alpha);
     }
 
-    public float getIconsAlpha() {
-        return getShortcutsAndWidgets().getAlpha();
+    /** Returns the alpha channel for ShortcutAndWidgetContainer */
+    public MultiProperty getIconsAlpha(@HotseatQsbAlphaId int channelId) {
+        return mIconsAlphaChannels.get(channelId);
+    }
+
+    /** Returns the alpha channel for Qsb */
+    public MultiProperty getQsbAlpha(@HotseatQsbAlphaId int channelId) {
+        return mQsbAlphaChannels.get(channelId);
     }
 
     /**
@@ -294,4 +323,24 @@
         return mQsb;
     }
 
+    /** Dumps the Hotseat internal state */
+    public void dump(String prefix, PrintWriter writer) {
+        writer.println(prefix + "Hotseat:");
+        mIconsAlphaChannels.dump(
+                prefix + "\t",
+                writer,
+                "mIconsAlphaChannels",
+                "ALPHA_CHANNEL_TASKBAR_ALIGNMENT",
+                "ALPHA_CHANNEL_PREVIEW_RENDERER",
+                "ALPHA_CHANNEL_TASKBAR_STASH");
+        mQsbAlphaChannels.dump(
+                prefix + "\t",
+                writer,
+                "mQsbAlphaChannels",
+                "ALPHA_CHANNEL_TASKBAR_ALIGNMENT",
+                "ALPHA_CHANNEL_PREVIEW_RENDERER",
+                "ALPHA_CHANNEL_TASKBAR_STASH"
+        );
+    }
+
 }
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 365e3d4..fa7f564 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2678,6 +2678,7 @@
             }
 
             writer.println(prefix + "  Hotseat");
+            mHotseat.dump(prefix, writer);
             ViewGroup layout = mHotseat.getShortcutsAndWidgets();
             for (int j = 0; j < layout.getChildCount(); j++) {
                 Object tag = layout.getChildAt(j).getTag();
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index 2408955..4af9e2f 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -23,6 +23,7 @@
 import static com.android.launcher3.BubbleTextView.DISPLAY_TASKBAR;
 import static com.android.launcher3.BubbleTextView.DISPLAY_WORKSPACE;
 import static com.android.launcher3.DeviceProfile.DEFAULT_SCALE;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_PREVIEW_RENDERER;
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION;
 import static com.android.launcher3.Utilities.SHOULD_SHOW_FIRST_PAGE_WIDGET;
 import static com.android.launcher3.model.ModelUtils.filterCurrentWorkspaceItems;
@@ -320,12 +321,12 @@
         mUiHandler.post(() -> {
             if (mDp.isTaskbarPresent) {
                 // hotseat icons on bottom
-                mHotseat.setIconsAlpha(hide ? 0 : 1);
+                mHotseat.setIconsAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
                 if (mDp.isQsbInline) {
-                    mHotseat.setQsbAlpha(hide ? 0 : 1);
+                    mHotseat.setQsbAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
                 }
             } else {
-                mHotseat.setQsbAlpha(hide ? 0 : 1);
+                mHotseat.setQsbAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
             }
         });
     }