Merge "Letterbox: Display rounded corners behind navigation bar instead of above." into sc-v2-dev

    private final LetterboxConfiguration mLetterboxConfiguration;

    private final ActivityRecord mActivityRecord;

    // Taskbar expanded height. Used to determine whether to crop an app window to display rounded

    // corners above the taskbar.

    private float mExpandedTaskBarHeight;

    private boolean mShowWallpaperForLetterboxBackground;

    @Nullable

        // is created in its constructor. It shouldn't be used in this constructor but it's safe

        // to use it after since controller is only used in ActivityRecord.

        mActivityRecord = activityRecord;

        mExpandedTaskBarHeight =

                getResources().getDimensionPixelSize(R.dimen.taskbar_frame_height);

    }

    /** Cleans up {@link Letterbox} if it exists.*/

            final InsetsSource taskbarInsetsSource =

                    insetsState.getSource(InsetsState.ITYPE_EXTRA_NAVIGATION_BAR);

            Rect cropBounds = new Rect(mActivityRecord.getBounds());

            // Activity bounds are in screen coordinates while (0,0) for activity's surface control

            // is at the top left corner of an app window so offsetting bounds accordingly.

            Rect cropBounds = null;

            // Rounded corners should be displayed above the taskbar. When taskbar is hidden,

            // an insets frame is equal to a navigation bar which shouldn't affect position of

            // rounded corners since apps are expected to handle navigation bar inset.

            // This condition checks whether the taskbar is visible.

            if (taskbarInsetsSource.getFrame().height() >= mExpandedTaskBarHeight) {

                cropBounds = new Rect(mActivityRecord.getBounds());

                // Activity bounds are in screen coordinates while (0,0) for activity's surface

                // control is at the top left corner of an app window so offsetting bounds

                // accordingly.

                cropBounds.offsetTo(0, 0);

                // Rounded cornerners should be displayed above the taskbar.

            cropBounds.bottom = Math.min(cropBounds.bottom, taskbarInsetsSource.getFrame().top);

                cropBounds.bottom =

                        Math.min(cropBounds.bottom, taskbarInsetsSource.getFrame().top);

                if (mActivityRecord.inSizeCompatMode()

                        && mActivityRecord.getSizeCompatScale() < 1.0f) {

                    cropBounds.scale(1.0f / mActivityRecord.getSizeCompatScale());

                }

            }

            transaction

                    .setWindowCrop(windowSurface, cropBounds)

                    .setCornerRadius(windowSurface, getRoundedCorners(insetsState));