[Webkit-unassigned] [Bug 24761] New: Make it possible to test Full Page Zoom in LayoutTests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=24761

           Summary: Make it possible to test Full Page Zoom in LayoutTests
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com


It's not possible to fully test full page zoom on LayoutTests.

Using zoom: style does exercise some of the right code paths, but not all of
them. When the user zooms, the page is unaware of any change: all the APIs that
take and receive coordinates (e.g. event clientX, pageX, offsetX, and
document.elementFromPoint()) continue to use "unzoomed" points.

However, if there is zoom style in the content, then those APIs take the zoom
into account, and use zoomed points.

So what we need is a DRT API that allows a test to do what Safari does when a
page gets zoomed.


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