Bug 14145 – RenderSVGContainer should not inherit from RenderContainer

• Component: SVG
• Status: RESOLVED FIXED

[Eric Seidel (no email)]

RenderSVGContainer should not inherit from RenderContainer

at least not now that RenderSVGRoot exists. :)

This may mean implementing a little bit of RenderContainer logic in RenderSVGContainer manually (like RenderContainer::paint() for instance.

[Eric Seidel (no email)]

Created attachment 15070 [details]
partial fix

I'm not sure I'll have time/energy to finish this patch, but I thought I should post my partial work anyway.

[Eric Seidel (no email)]

Created attachment 15101 [details]
working patch (rob to finish)

Ok, so this patch works completely (no crashes, etc).  There are two things which still need to be done.

1.  It breaks 4 test cases.  I believe this is something to do with hit-testing errors in RenderSVGContainer when it's being an <svg>
2.  Still need to change RenderSVGRoot::rendererName() to return RenderSVGRoot and update tests accordingly.

[Nikolas Zimmermann]

Created attachment 15522 [details]
Initial patch

New patch incorporating Eric's patch, but bringing it to a working state w/o regressions.
Inlcudes some fixes from Rob made during WWDC.

[Oliver Hunt]

Comment on attachment 15522 [details]
Initial patch

     // Only the root <svg> element should need any translations using the HTML/CSS system
     // parentX, parentY are also non-zero for first-level kids of these
     // CSS-transformed <svg> root-elements (due to RenderBox::paint) for any other element
     // they should be 0.   m_x, m_y should always be 0 for non-root svg containers
-    ASSERT(m_x == 0);
-    ASSERT(m_y == 0);

should the assertions not become isRoot || m_x == 0
etc?

[Nikolas Zimmermann]

(In reply to comment #4)
> (From update of attachment 15522 [details] [edit])
>      // Only the root <svg> element should need any translations using the
> HTML/CSS system
>      // parentX, parentY are also non-zero for first-level kids of these
>      // CSS-transformed <svg> root-elements (due to RenderBox::paint) for any
> other element
>      // they should be 0.   m_x, m_y should always be 0 for non-root svg
> containers
> -    ASSERT(m_x == 0);
> -    ASSERT(m_y == 0);
> 
> should the assertions not become isRoot || m_x == 0
> etc?
> 

The outermost <svg> element is handled by RenderSVGRoot
nowadays. The commented is outdated, I'll fix it.

Greetings,
Niko

[Nikolas Zimmermann]

Landed in r24292.