[Webkit-unassigned] [Bug 110964] New: Allow text selection region to be computed relative to container

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=110964

           Summary: Allow text selection region to be computed relative to
                    container
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: anilsson at rim.com
                CC: tonikitoo at webkit.org, jpetsovits at rim.com,
                    mifenton at rim.com, anilsson at rim.com


Currently, it's possible to compute the absolute quads for text runs, but with a minor tweak it would be possible to compute them relative to container as well.

The BlackBerry port has always rendered the selection as a separate overlay to avoid re-rendering the page when selection changes. This is an optimisation. We're now switching to an approach where the selection highlight is drawn using several overlays, one overlay for each container that contains part of the selection. This allows our selection overlay(s) to move along with scrollable divs, frames, fixed pos items, transformed elements etc despite being a separate overlay(s).

I want to put the patch up for review here to get your feedback.

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