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Issue 613341 link

Starred by 2 users
Status: WontFix
Owner: ----
Closed: Sep 2017
Cc:
ajha@chromium.org
jfernan...@igalia.com
r...@igalia.com
█ brajkumar@chromium.org
svil...@igalia.com
Components:
EstimatedDays: ----
NextAction: ----
OS: All
Pri: 2
Type: Compat

Blocking:
issue 614667



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[css-grid] Fragmentation slices a grid row

Project Member Reported by mpalmg...@mozilla.com, May 19 2016 
UserAgent: Mozilla/5.0 (X11; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0

Example URL:

Steps to reproduce the problem:
1. load the attached testcase

What is the expected behavior?
The break should occur between the 3rd and 4th row.
In the first column, the blue left/right borders (of the grid container) should extend to the end of the black border (of the grid item), i.e. there should be no spacing at the break.
In the second column, there should be no space above the grid item.

What went wrong?
The break occurs inside the 4th grid row, slicing it and its item.  The CSS Grid spec says: "Class A break opportunities occur between rows or columns (whichever is in the appropriate axis)"
https://drafts.csswg.org/css-grid/#pagination
https://www.w3.org/TR/css-break-3/#btw-blocks

which makes it very clear that there are no break opportunities inside tracks, only between them.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 52.0.2716.0 (Official Build) dev (64-bit)  Channel: n/a
OS Version: 
Flash Version: 

The testcase renders according to spec in Firefox Nightly.
grid-fragmentation-chrome-bug3.html
815 bytes View Download

Comment 1 by brajkumar@chromium.org, May 20 2016

Cc: brajkumar@chromium.org
Labels: Needs-Feedback
Tested this issue on Ubuntu 14.04 using chrome latest Dev M52-52.0.2739.0 and observed the similar behavior across all other browsers as shown in the screen-shot by opening the provided html file.

mpalmgren@ - Could you please confirm what's the expected behavior of this issue by providing a snap-shot.

Thanks!
ComparisionGrid.JPG
124 KB View Download

Comment 2 by mpalmg...@mozilla.com, May 20 2016 

The testcase renders according to spec in Firefox Nightly.
https://nightly.mozilla.org/

Comment 3 by mpalmg...@mozilla.com, May 20 2016 

Also, looking at your screenshot it seems you haven't enabled Grid layout
in Chrome.  (FYI, I'm implementing CSS Grid in Gecko.)
Project Member

Comment 4 by sheriffbot@chromium.org, May 21 2016

Labels: -Needs-Feedback Needs-Review
Owner: brajkumar@chromium.org
Thank you for providing more feedback. Adding requester "brajkumar@chromium.org" for another review and adding "Needs-Review" label for tracking.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Comment 5 by ajha@chromium.org, May 25 2016

Cc: ajha@chromium.org
Components: Blink>Layout>Grid
Labels: -Needs-Review M-53 OS-Mac OS-Windows
Owner: r...@igalia.com
Status: Assigned (was: Unconfirmed)
Assigning to rego@ for help in further investigation and more inputs on this.

Comment 6 by r...@igalia.com, May 25 2016

Blocking: 614667
Cc: svil...@igalia.com jfernan...@igalia.com
Labels: -OS-Linux -OS-Windows -OS-Mac OS-All
Thanks for reporting this.

Yeah, fragmentation is still not implemented on Grid Layout, so it's a well-known bug. :-)
I've just report a meta-bug (issue #614667) to track all this once we work on it.
bug-613341-current.png
4.4 KB View Download
bug-613341-expected.png
3.7 KB View Download
Project Member

Comment 7 by sheriffbot@chromium.org, Jul 9 2016

Labels: -M-53 M-54 MovedFrom-53
Moving this nonessential bug to the next milestone.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Comment 8 by rbyers@chromium.org, Oct 3 2016

Labels: Hotlist-Interop
Bulk-adding Hotlist-Interop to bugs filed by other browser vendors based on the summary.  Feel free to remove if this issue doesn't actually reflect a difference in behavior between engines.

Comment 9 by r...@igalia.com, Oct 19 2016

Cc: r...@igalia.com
Labels: -M-54 -MovedFrom-53
Owner: ----
Status: Available (was: Assigned)
The whole engine has issues with fragmentation, so this is not a priority for Grid Layout at this point.

Comment 10 by e...@chromium.org, Sep 8 2017

Status: WontFix (was: Available)
►

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