Bug 73272 – CSS Grid Layout: Add support for parsing multiple grid-columns or grid-rows

• Component: CSS
• Status: RESOLVED FIXED

[Julien Chaffraix]

Currently we support only a subset of grid-columns and grid-rows. Let's extend it to better match the specification.

My goal is to add support for the following syntax as part of this bug:

<track-list> := [ <track-breadth> ]+ | 'none'
<track-breadth> := <length> | <percentage> | 'auto'

[Julien Chaffraix]

Created attachment 116867 [details]
Proposed change 1: implement the new syntax.

[WebKit Review Bot]

Attachment 116867 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/fast..." exit_code: 1

Source/WebCore/css/CSSStyleSelector.cpp:2522:  Code inside a namespace should not be indented.  [whitespace/indent] [4]
Total errors found: 1 in 10 files


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

[Tony Chang]

Comment on attachment 116867 [details]
Proposed change 1: implement the new syntax.

View in context: https://bugs.webkit.org/attachment.cgi?id=116867&action=review

> Source/WebCore/css/CSSStyleSelector.cpp:2520
> +    if (type == CSSPrimitiveValue::CSS_PERCENTAGE)
> +        length = Length(primitiveValue->getDoubleValue(), Percent);
> +        return true;
> +    }

Missing { here.  I think that confused the style checker.

> Source/WebCore/css/CSSStyleSelector.cpp:2544
> +        // Handle the special property 'none'.

Nit: You might want the comment to say how you 'none' is different.

[Julien Chaffraix]

Comment on attachment 116867 [details]
Proposed change 1: implement the new syntax.

View in context: https://bugs.webkit.org/attachment.cgi?id=116867&action=review

>> Source/WebCore/css/CSSStyleSelector.cpp:2520
>> +    }
> 
> Missing { here.  I think that confused the style checker.

Good catch, I missed it and thought style checker was confused.

>> Source/WebCore/css/CSSStyleSelector.cpp:2544
>> +        // Handle the special property 'none'.
> 
> Nit: You might want the comment to say how you 'none' is different.

I am not sure I follow your nit here. Do you mind clarifying?

[Tony Chang]

Comment on attachment 116867 [details]
Proposed change 1: implement the new syntax.

View in context: https://bugs.webkit.org/attachment.cgi?id=116867&action=review

>>> Source/WebCore/css/CSSStyleSelector.cpp:2544
>>> +        // Handle the special property 'none'.
>> 
>> Nit: You might want the comment to say how you 'none' is different.
> 
> I am not sure I follow your nit here. Do you mind clarifying?

Something like, "We use a single undefined length to specify a track-list of 'none'."  Or maybe just remove the comment.

[Julien Chaffraix]

Comment on attachment 116867 [details]
Proposed change 1: implement the new syntax.

View in context: https://bugs.webkit.org/attachment.cgi?id=116867&action=review

>>>> Source/WebCore/css/CSSStyleSelector.cpp:2544
>>>> +        // Handle the special property 'none'.
>>> 
>>> Nit: You might want the comment to say how you 'none' is different.
>> 
>> I am not sure I follow your nit here. Do you mind clarifying?
> 
> Something like, "We use a single undefined length to specify a track-list of 'none'."  Or maybe just remove the comment.

Fine enough, I will remove it in the patch to land. I have seen a couple of missing of return in the implementation. I don't understand why it was not caught by the cases but I need to investigate before landing this patch as it may mean that our current test coverage is not good enough.

[Julien Chaffraix]

> I have seen a couple of missing of return in the implementation. I don't understand why it was not caught by the cases but I need to investigate before landing this patch as it may mean that our current test coverage is not good enough.

I found out the issue: some code was unneeded (basically I was trying to handle several values on a CSSPrimitiveValue which was never reached). I have extended the testing a bit and removed this dead code in the to-be-landed-soon patch.

[Julien Chaffraix]

Created attachment 117982 [details]
Patch for landing

[Julien Chaffraix]

Comment on attachment 117982 [details]
Patch for landing

Something is fishy on this patch.

[Julien Chaffraix]

(In reply to comment #9)
> (From update of attachment 117982 [details])
> Something is fishy on this patch.

Actually it was fine, I just needed to double-check the logic. My comment #7 was half true: some code was unneeded and it is not because it would try to parse several values for a CSSPrimitiveValue but because the parser consider most of our input as a CSSValueList (even for 1 item).

[Julien Chaffraix]

Created attachment 117987 [details]
Patch for landing for tomorrow.

[WebKit Review Bot]

Comment on attachment 117987 [details]
Patch for landing for tomorrow.

Rejecting attachment 117987 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=queues.webkit.org', '-..." exit_code: 2

Last 500 characters of output:
112974 --non-interactive --force --accept theirs-conflict --ignore-externals returned non-zero exit status 1 in /mnt/git/webkit-commit-queue/Source/WebKit/chromium
Error: 'depot_tools/gclient sync --force --reset --delete_unversioned_trees' failed 3 tries and returned 256 at Tools/Scripts/update-webkit-chromium line 109.
Re-trying 'depot_tools/gclient sync --force --reset --delete_unversioned_trees'
No such file or directory at /mnt/git/webkit-commit-queue/Tools/Scripts/webkitdirs.pm line 2078.

Full output: http://queues.webkit.org/results/10736846

[Julien Chaffraix]

Committed r102183: <http://trac.webkit.org/changeset/102183>