Currently, once we decide to animate a scroll to an offset, we update the scroll a little bit each frame until it reaches the specified offset.

However, the scroller's maximum scroll offset might become smaller than the specified offset. There would be bugs if we still decides to animate to the originally specified offset. We should always clamp the scroll offset during the animation.


 

Currently, once we decide to animate a scroll to an offset, we update the scroll a little bit each frame until it reaches the specified offset.

However, during the animation, the scroller's maximum scroll offset might become smaller than the specified offset. For example, on an android device, user wants to find a string in a page. After tapping the 'search' icon on the virtual keyboard, the smooth scroll is initialized but the window's size becomes larger as the virtual keyboard disappears. In such cases, if we still decides to animate to the originally specified offset, the page won't be rendered correctly. We should always clamp the scroll offset during the animation.



 

Currently, once we decide to animate a scroll to an offset, we update the scroll a little bit each frame until it reaches the specified offset.

However, during the animation, the scroller's maximum scroll offset might become smaller than the specified offset. For example, on an android device, user wants to find a string in a page. After tapping the 'search' icon on the virtual keyboard, the smooth scroll is initialized but the window's size becomes larger as the virtual keyboard disappears. In such cases, if we still decide to animate to the originally specified offset, the page won't be rendered correctly. We should always clamp the scroll offset during the animation.