[css-grid] Avoid duplicated calls to resolution code

[Manuel Rego Casasnovas]

We're calling several times per item to the same methods in order to resolve the grid positions over an over.

Now that GridSpan doesn't have pointers anymore, we could just call the resolution code once and store it in the GridCoordinates cache.

This is a port from Blink of https://codereview.chromium.org/1465153004/

[Manuel Rego Casasnovas]

Created attachment 271550 [details]
Patch

[Sergio Villar Senin]

Comment on attachment 271550 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=271550&action=review

Nice change

> Source/WebCore/rendering/RenderGrid.cpp:1184
> +    for (RenderBox* child = m_orderIterator.first(); child; child = m_orderIterator.next()) {

Perhaps not for this patch but we should make OrderIterator a stl iterator-like class so that instead of first() and next() we have begin() and end() and we could do things like

for (auto child : m_orderIterator)

[Manuel Rego Casasnovas]

(In reply to comment #2)
> Comment on attachment 271550 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=271550&action=review
> 
> Nice change

Thanks for the review!

> > Source/WebCore/rendering/RenderGrid.cpp:1184
> > +    for (RenderBox* child = m_orderIterator.first(); child; child = m_orderIterator.next()) {
> 
> Perhaps not for this patch but we should make OrderIterator a stl
> iterator-like class so that instead of first() and next() we have begin()
> and end() and we could do things like
> 
> for (auto child : m_orderIterator)

Note down in bug #154590.

[WebKit Commit Bot]

Comment on attachment 271550 [details]
Patch

Clearing flags on attachment: 271550

Committed r196983: <http://trac.webkit.org/changeset/196983>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.