Merge "Account for all apps offset during taskbar layout" into main
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 4449d92..6cc03ab 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -122,6 +122,8 @@
 
     private final int mMaxNumIcons;
 
+    private final int mAllAppsButtonTranslationOffset;
+
     public TaskbarView(@NonNull Context context) {
         this(context, null);
     }
@@ -141,8 +143,6 @@
         mActivityContext = ActivityContext.lookupContext(context);
         mIconLayoutBounds = mActivityContext.getTransientTaskbarBounds();
         Resources resources = getResources();
-        boolean isTransientTaskbar = DisplayController.isTransientTaskbar(mActivityContext)
-                && !mActivityContext.isPhoneMode();
         mIsRtl = Utilities.isRtl(resources);
         mTransientTaskbarMinWidth = resources.getDimension(R.dimen.transient_taskbar_min_width);
 
@@ -173,6 +173,8 @@
         setWillNotDraw(false);
 
         mAllAppsButtonContainer = new TaskbarAllAppsButtonContainer(context);
+        mAllAppsButtonTranslationOffset =  (int) getResources().getDimension(
+                mAllAppsButtonContainer.getAllAppsButtonTranslationXOffset(isTransientTaskbar()));
 
         if (enableTaskbarPinning() || enableRecentsInTaskbar()) {
             mTaskbarDividerContainer = new TaskbarDividerContainer(context);
@@ -221,9 +223,7 @@
                 enableTaskbarPinning() && !mActivityContext.isThreeButtonNav();
         availableWidth -= iconSize - (int) getResources().getDimension(
                 mAllAppsButtonContainer.getAllAppsButtonTranslationXOffset(
-                        forceTransientTaskbarSize || (
-                                DisplayController.isTransientTaskbar(mActivityContext)
-                                        && !mActivityContext.isPhoneMode())));
+                        forceTransientTaskbarSize || isTransientTaskbar()));
         ++additionalIcons;
 
         return Math.floorDiv(availableWidth, iconSize) + additionalIcons;
@@ -690,6 +690,15 @@
         mIconLayoutBounds.right = iconEnd;
         mIconLayoutBounds.top = (bottom - top - mIconTouchSize) / 2;
         mIconLayoutBounds.bottom = mIconLayoutBounds.top + mIconTouchSize;
+
+        // With rtl layout, the all apps button will be translated by `allAppsButtonOffset` after
+        // layout completion (by `TaskbarViewController`). Offset the icon end by the same amount
+        // when laying out icons, so the taskbar content remains centered after all apps button
+        // translation.
+        if (layoutRtl) {
+            iconEnd += mAllAppsButtonTranslationOffset;
+        }
+
         int count = getChildCount();
         for (int i = count; i > 0; i--) {
             View child = getChildAt(i - 1);
@@ -721,6 +730,15 @@
 
         mIconLayoutBounds.left = iconEnd;
 
+        // Adjust the icon layout bounds by the amount by which all apps button will be translated
+        // post layout to maintain margin between all apps button and the edge of the transient
+        // taskbar background. Done for ltr layout only - for rtl layout, the offset needs to be
+        // adjusted on the right, which is done by offsetting `iconEnd` after setting
+        // `mIconLayoutBounds.right`.
+        if (!layoutRtl) {
+            mIconLayoutBounds.left += mAllAppsButtonTranslationOffset;
+        }
+
         if (mIconLayoutBounds.right - mIconLayoutBounds.left < mTransientTaskbarMinWidth) {
             int center = mIconLayoutBounds.centerX();
             int distanceFromCenter = (int) mTransientTaskbarMinWidth / 2;
@@ -763,12 +781,13 @@
     /**
      * Returns the space used by the icons
      */
-    public int getIconLayoutWidth() {
+    private int getIconLayoutWidth() {
         int countExcludingQsb = getChildCount();
         DeviceProfile deviceProfile = mActivityContext.getDeviceProfile();
         if (deviceProfile.isQsbInline) {
             countExcludingQsb--;
         }
+
         int iconLayoutBoundsWidth =
                 countExcludingQsb * (mItemMarginLeftRight * 2 + mIconTouchSize);
 
@@ -777,17 +796,28 @@
             // All Apps icon, divider icon, and first app icon in taskbar
             iconLayoutBoundsWidth -= mItemMarginLeftRight * 4;
         }
+
+        // The all apps button container gets offset horizontally, reducing the overall taskbar
+        // view size.
+        iconLayoutBoundsWidth -= mAllAppsButtonTranslationOffset;
+
         return iconLayoutBoundsWidth;
     }
 
     /**
-     * Returns the app icons currently shown in the taskbar.
+     * Returns the app icons currently shown in the taskbar. The returned list does not include qsb,
+     * but it includes all apps button and icon divider views.
      */
     public View[] getIconViews() {
         final int count = getChildCount();
-        View[] icons = new View[count];
+        if (count == 0) {
+            return new View[0];
+        }
+        View[] icons = new View[count - (mActivityContext.getDeviceProfile().isQsbInline ? 1 : 0)];
+        int insertionPoint = 0;
         for (int i = 0; i < count; i++) {
-            icons[i] = getChildAt(i);
+            if (getChildAt(i)  == mQsb) continue;
+            icons[insertionPoint++] = getChildAt(i);
         }
         return icons;
     }
@@ -869,12 +899,25 @@
         // Ignore, we just implement Insettable to draw behind system insets.
     }
 
+    private boolean isTransientTaskbar() {
+        return DisplayController.isTransientTaskbar(mActivityContext)
+                && !mActivityContext.isPhoneMode();
+    }
+
     public boolean areIconsVisible() {
         // Consider the overall visibility
         return getVisibility() == VISIBLE;
     }
 
     /**
+     * @return The all apps button horizontal offset used to calculate the taskbar contents width
+     * during layout.
+     */
+    public int getAllAppsButtonTranslationXOffsetUsedForLayout() {
+        return mAllAppsButtonTranslationOffset;
+    }
+
+    /**
      * Maps {@code op} over all the child views.
      */
     public void mapOverItems(LauncherBindableItemsContainer.ItemOperator op) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index 5cc211d..6f2d459 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -359,10 +359,6 @@
         return mTaskbarView.getIconLayoutBounds();
     }
 
-    public int getIconLayoutWidth() {
-        return mTaskbarView.getIconLayoutWidth();
-    }
-
     public View[] getIconViews() {
         return mTaskbarView.getIconViews();
     }
@@ -442,6 +438,19 @@
         float allAppIconTranslateRange = mapRange(scale, transientTaskbarAllAppsOffset,
                 persistentTaskbarAllAppsOffset);
 
+        // Task icons are laid out so the taskbar content is centered. The taskbar width (used for
+        // centering taskbar icons) depends on the all apps button X translation, and is different
+        // for persistent and transient taskbar. If the offset used for current taskbar layout is
+        // different than the offset used in final taskbar state, the icons may jump when the
+        // animation completes, and the taskbar is replaced. Adjust item transform to account for
+        // this mismatch.
+        float sizeDiffTranslationRange =
+                mapRange(scale,
+                        (mTaskbarView.getAllAppsButtonTranslationXOffsetUsedForLayout()
+                                - transientTaskbarAllAppsOffset) / 2,
+                        (mTaskbarView.getAllAppsButtonTranslationXOffsetUsedForLayout()
+                                - persistentTaskbarAllAppsOffset) / 2);
+
         // no x translation required when all apps button is the only icon in taskbar.
         if (iconViews.length <= 1) {
             allAppIconTranslateRange = 0f;
@@ -449,6 +458,7 @@
 
         if (mIsRtl) {
             allAppIconTranslateRange *= -1;
+            sizeDiffTranslationRange *= -1;
         }
 
         if (mActivity.isThreeButtonNav()) {
@@ -457,25 +467,18 @@
             return;
         }
 
-        float taskbarCenterX =
-                mTaskbarView.getLeft() + (mTaskbarView.getRight() - mTaskbarView.getLeft()) / 2.0f;
-
         float finalMarginScale = mapRange(scale, 0f, mTransientIconSize - mPersistentIconSize);
 
-        float halfIconCount = iconViews.length / 2.0f;
+        // The index of the "middle" icon which will be used as a index from which the icon margins
+        // will be scaled. If number of icons is even, using the middle point between indices of two
+        // central icons.
+        float middleIndex = (iconViews.length - 1) / 2.0f;
         for (int iconIndex = 0; iconIndex < iconViews.length; iconIndex++) {
             View iconView = iconViews[iconIndex];
             MultiTranslateDelegate translateDelegate =
                     ((Reorderable) iconView).getTranslateDelegate();
-            float iconCenterX =
-                    iconView.getLeft() + (iconView.getRight() - iconView.getLeft()) / 2.0f;
-            if (iconCenterX <= taskbarCenterX) {
-                translateDelegate.getTranslationX(INDEX_TASKBAR_PINNING_ANIM).setValue(
-                        finalMarginScale * (halfIconCount - iconIndex));
-            } else {
-                translateDelegate.getTranslationX(INDEX_TASKBAR_PINNING_ANIM).setValue(
-                        -finalMarginScale * (iconIndex - halfIconCount));
-            }
+            translateDelegate.getTranslationX(INDEX_TASKBAR_PINNING_ANIM).setValue(
+                    finalMarginScale * (middleIndex - iconIndex) + sizeDiffTranslationRange);
 
             if (iconView.equals(mTaskbarView.getAllAppsButtonContainer())) {
                 mTaskbarView.getAllAppsButtonContainer().setTranslationXForTaskbarAllAppsIcon(
@@ -488,18 +491,14 @@
      * Calculates visual taskbar view width.
      */
     public float getCurrentVisualTaskbarWidth() {
-        if (mTaskbarView.getIconViews().length == 0) {
+        View[] iconViews = mTaskbarView.getIconViews();
+        if (iconViews.length == 0) {
             return 0;
         }
 
-        View[] iconViews = mTaskbarView.getIconViews();
+        float left = iconViews[0].getX();
 
-        int leftIndex = mActivity.getDeviceProfile().isQsbInline && !mIsRtl ? 1 : 0;
-        int rightIndex = mActivity.getDeviceProfile().isQsbInline && mIsRtl
-                ? iconViews.length - 2
-                : iconViews.length - 1;
-
-        float left = iconViews[leftIndex].getX();
+        int rightIndex = iconViews.length - 1;
         float right = iconViews[rightIndex].getRight() + iconViews[rightIndex].getTranslationX();
 
         return right - left + (2 * mTaskbarLeftRightMargin);