Move zero-length-subpaths from RenderSVGShape to RenderSVGPath

[Philip Rogers]

The SVG spec only allows zero-length-subpaths in paths but our current codebase has the code in RenderSVGShape, the superclass of RenderSVGRect and RenderSVGEllipse. Neither rects nor ellipses can contain zero-length-subpaths so we should move the zero-length-subpath code into RenderSVGPath for better code clarity and rendering performance.

[Philip Rogers]

Created attachment 151129 [details]
Preliminary patch

This patch depends on both WK90514 and WK90655 so it's just a preview until those land.

[Philip Rogers]

Created attachment 152024 [details]
Move zero-length-subpaths from RenderSVGShape to RenderSVGPath

[Stephen Chenney]

Comment on attachment 152024 [details]
Move zero-length-subpaths from RenderSVGShape to RenderSVGPath

View in context: https://bugs.webkit.org/attachment.cgi?id=152024&action=review

Looks good to me.

> Source/WebCore/ChangeLog:10
> +        to RenderSVGPath.

I would suggest adding what you gain by this.

[Philip Rogers]

Created attachment 152046 [details]
Update per reviewer comments

Updated ChangeLog to summarize why this is awesome.

Also added OVERRIDEs to RenderSVGPath per schenney's comments in wkb.ug/88231

[Philip Rogers]

Nikolas, I think you may have the most context for a review here. Friendly ping for a review :)

[Nikolas Zimmermann]

Comment on attachment 152046 [details]
Update per reviewer comments

View in context: https://bugs.webkit.org/attachment.cgi?id=152046&action=review

Looks great, r=me with a minor comment.

> Source/WebCore/rendering/svg/RenderSVGPath.cpp:56
> +FloatRect RenderSVGPath::updateStrokeBoundingBox() const

I think updateStrokeBoundingBox is a misleading name, as it returns a new strokeBoundingBox, instead of updating the m_strokeBoundingBox.
Maybe you can come up with a better name not involving update...

> Source/WebCore/rendering/svg/RenderSVGPath.cpp:96
> +    context->save();

Use GraphicsContextStateSaver stateSaver(*context, true) here.

[Philip Rogers]

Created attachment 152821 [details]
Update per reviewer comments (2)

[WebKit Review Bot]

Comment on attachment 152821 [details]
Update per reviewer comments (2)

Clearing flags on attachment: 152821

Committed r122875: <http://trac.webkit.org/changeset/122875>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.