[Webkit-unassigned] [Bug 153488] New: [meta][css-grid] Support implicit grid before explicit grid

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jan 26 08:28:34 PST 2016


            Bug ID: 153488
           Summary: [meta][css-grid] Support implicit grid before explicit
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: ASSIGNED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rego at igalia.com
                CC: simon.fraser at apple.com
            Blocks: 60731

In our current implementation the implicit grid is only after the explicit grid.

For example, in a 2x2 grid, if you have an item with:
  grid-row: 3;
An implicit 3rd row is created.

However, if you have an item like:
  grid-column: -4;
We should be creating an implicit column before the first one.

This has been already implemented on Blink (http://crbug.com/444011)
following a plan described in this document (http://bit.ly/1j3CRdi).

We should port these patches to WebKit as the grid layout code has the same issues.

This will be used as meta-bug for all the patches related.

More info in the spec: http://dev.w3.org/csswg/css-grid/#line-placement

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