Merge "Ensuring that tasks in the back are always visible."

    private static final float STACK_PEEK_MIN_SCALE = 0.85f;

    // The scale of the last task

    private static final float SINGLE_TASK_SCALE = 0.95f;

    // The percentage of the height of the stack that we want to show the last task at

    private static final float VISIBLE_LAST_TASK_HEIGHT_PCT = 0.45f;

    // The percentage of height of task to show between tasks

    private static final float VISIBLE_TASK_HEIGHT_BETWEEN_TASKS = 0.5f;

    // The percentage between the maxStackScroll and the maxScroll where a given scroll will still

            mFrontMostTaskP = pAtFrontMostTaskTop;

            // Set the stack end scroll progress to the point at which the bottom of the front-most

            // task is aligned to the bottom of the stack

            mStackEndScrollP = alignToStackBottom(pAtFrontMostTaskTop,

                    mTaskHeightPOffset);

            mStackEndScrollP = alignToStackBottom(pAtFrontMostTaskTop, mTaskHeightPOffset);

            if (mNumStackTasks > 1) {

                // Set the preferred stack end scroll progress to the point where the bottom of the

                // front-most task is offset by the navbar and padding from the bottom of the stack

                mPreferredStackEndScrollP = mStackEndScrollP + mStackBottomPOffset;

            // Basically align the back-most task such that its progress is the same as the top of

            // the front most task at the max stack scroll

            mMinScrollP = alignToStackBottom(pAtBackMostTaskTop,

                    mStackBottomPOffset + mTaskHeightPOffset);

                // Basically align the back-most task such that the last two tasks would be visible

                mMinScrollP = alignToStackBottom(pAtBackMostTaskTop, 2 *

                        mBetweenAffiliationPOffset);

            } else {

                // When there is a single item, then just make all the stack progresses the same

                mPreferredStackEndScrollP = mStackEndScrollP;

                mMinScrollP = mStackEndScrollP;

            }

        } else {

            // TODO: In the case where there is only freeform tasks, then the scrolls should be

            // set to zero

            // Center the task in the stack, changing the scale will not follow the curve, but just

            // modulate some values directly

            float pTaskRelative = mMinScrollP - stackScroll;

            float scale = SINGLE_TASK_SCALE;

            float scale = (mNumFreeformTasks > 0) ? 1f : SINGLE_TASK_SCALE;

            int topOffset = (mStackRect.height() - mTaskRect.height()) / 2;

            transformOut.scale = scale;

            transformOut.translationX = 0;