Bug 35225 – Remove addScrolledContentOffset/subtractScrolledContentOffset

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Simon Fraser (smfr)]

scrolledContentOffset is already available as an IntPoint. We should just use it.

[Simon Fraser (smfr)]

Created attachment 49182 [details]
Patch

[Darin Adler]

Comment on attachment 49182 [details]
Patch

An excellent idea.

> +        IntRect clipRect(IntPoint() + m_offset + renderer->view()->layoutDelta(), layer->size());

It's annoying that the way to convert an IntSize to an IntPoint is to do "IntPoint() + size". That might end up doing addition to zero instead of just converting the type. I wish there was a clean idiom for doing that without addition.

>  void RenderBlock::offsetForContents(int& tx, int& ty) const

These arguments are just begging to be turned into an IntPoint&. Some day.

>      FloatPoint offsetFromRepaintContainer = transformState.mappedPoint();
> -    int x = offsetFromRepaintContainer.x();
> -    int y = offsetFromRepaintContainer.y();
>  
>      if (hasOverflowClip())
> -        layer()->subtractScrolledContentOffset(x, y);
> +        offsetFromRepaintContainer -= layer()->scrolledContentOffset();
> +
> +    int x = offsetFromRepaintContainer.x();
> +    int y = offsetFromRepaintContainer.y();

The old code did integer subtraction. This new code does floating point subtraction.

r=me too (I see mitz reviewed)

[Simon Fraser (smfr)]

http://trac.webkit.org/changeset/55090