Bug 81366 – Add a RenderMultiColumnBlock subclass for multi-column layout.

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Dave Hyatt]

Add RenderMultiColumnBlock to handle layout of multi-column blocks. This will allow most of the multi-column code that is polluting RenderBlock to be implemented in the subclass instead.

[Dave Hyatt]

Created attachment 132313 [details]
Patch

Comment on attachment 132313 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=132313&action=review

> Source/WebCore/rendering/RenderMultiColumnBlock.cpp:43
> +    if (isAnonymousBlock())
> +        return "RenderMultiColumnBlock (anonymous)";

Just curious, can this case ever happen?

[Peter Beverloo]

Comment on attachment 132313 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=132313&action=review

> Source/WebCore/rendering/RenderMultiColumnBlock.cpp:44
> +    else if (isAnonymous())

drive-by nit: s/else if/if/ for consistency, considering that we know that isAnonymousBlock() and other previous checks are false.

[Dave Hyatt]

(In reply to comment #3)
> (From update of attachment 132313 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=132313&action=review
> 
> > Source/WebCore/rendering/RenderMultiColumnBlock.cpp:44
> > +    else if (isAnonymous())
> 
> drive-by nit: s/else if/if/ for consistency, considering that we know that isAnonymousBlock() and other previous checks are false.

Yup, sure. This was cut-and-paste from RenderBlock, which has the same issue.

[Dave Hyatt]

(In reply to comment #2)
> (From update of attachment 132313 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=132313&action=review
> 
> > Source/WebCore/rendering/RenderMultiColumnBlock.cpp:43
> > +    if (isAnonymousBlock())
> > +        return "RenderMultiColumnBlock (anonymous)";
> 
> Just curious, can this case ever happen?

Theoretically it will be possible to create anonymous multi-column layouts using CSS Page Templates, so I figured I might as well leave it in.

[Dave Hyatt]

Created attachment 132347 [details]
New patch just to test EWS

[WebKit Review Bot]

Attachment 132347 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/CMakeLists.txt', u'Source/W..." exit_code: 1
Source/WebCore/rendering/RenderMultiColumnBlock.h:35:  This { should be at the end of the previous line  [whitespace/braces] [4]
Total errors found: 1 in 16 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Dave Hyatt]

Fixed in r111048. Will watch bots.