Merge "Move activities to fullscreen stack on display removal"

    }

    private void handleDisplayRemoved(int displayId) {

        if (displayId == DEFAULT_DISPLAY) {

            throw new IllegalArgumentException("Can't remove the primary display.");

        }

        synchronized (mService) {

            ActivityDisplay activityDisplay = mActivityDisplays.get(displayId);

            if (activityDisplay != null) {

                final boolean destroyContentOnRemoval

                        = activityDisplay.shouldDestroyContentOnRemove();

                ArrayList<ActivityStack> stacks = activityDisplay.mStacks;

                for (int stackNdx = stacks.size() - 1; stackNdx >= 0; --stackNdx) {

                    final ActivityStack stack = stacks.get(stackNdx);

                    moveStackToDisplayLocked(stack.mStackId, DEFAULT_DISPLAY,

                            !destroyContentOnRemoval /* onTop */);

                final ArrayList<ActivityStack> stacks = activityDisplay.mStacks;

                while (!stacks.isEmpty()) {

                    final ActivityStack stack = stacks.get(0);

                    if (destroyContentOnRemoval) {

                        moveStackToDisplayLocked(stack.mStackId, DEFAULT_DISPLAY,

                                false /* onTop */);

                        stack.finishAllActivitiesLocked(true /* immediately */);

                    } else {

                        // Moving all tasks to fullscreen stack, because it's guaranteed to be

                        // a valid launch stack for all activities. This way the task history from

                        // external display will be preserved on primary after move.

                        moveTasksToFullscreenStackLocked(stack.getStackId(), true /* onTop */);

                    }

                }

                mActivityDisplays.remove(displayId);