[Webkit-unassigned] [Bug 45399] New: -webkit-line-clamp is not respected when visibility is hidden

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45399

           Summary: -webkit-line-clamp is not respected when visibility is
                    hidden
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rob.brackett at gmail.com


Created an attachment (id=66913)
 --> (https://bugs.webkit.org/attachment.cgi?id=66913)
Test case for -webkit-line-clamp and visibility hidden issue

When an element with visibility: hidden and -webkit-line-clamp: [anything] is appended to the DOM, the line clamp is not respected, even after setting visibility: visible or removing the visibility setting altogether. Note that the problem really seems to be that -webkit-line-clamp is ignored when rendering an element with visibility: hidden, not when making it visible (although the problem continues to persist then).

Test case attached.

Brief example:
  <div id="root">
    <div id="container">
      <p id="clamped">
        Blah blah blah
      </p>
    </div>
  </div>

1. Remove #container
2. Set visibility: hidden on #container
3. Append #container to #root
4. Remove visibility: hidden on #container

This also works if the element you remove and set visibility on is #clamped instead of #container. Just wanted to illustrate that it could be any node up the tree.

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