[Webkit-unassigned] [Bug 92637] New: webkitRegionOverflow giving random value

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=92637

           Summary: webkitRegionOverflow giving random value
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: johannes.wilm at sourcefabric.org


It seems that there is a bug in Chromium/Webkit that makes webkitRegionOverflow output random values. At times it says it fits, when it doesn't and at other times it says overflow, when it really does fit. The overset property of a NamedFlow gives the same random result.

The below code shows how I try to add new pages based on whether the previous is full. 

You can check out the full example by including the JS/CSS from this project:https://github.com/sourcefabric/BookJS


function setupDocument() {
    $('body').wrapInner('<div id="contents" />');
    $('body').append('<div id="layout" />');
    $('#layout').append('<div class="page"><div class="contents"></div><div class="pagenumber"></div></div>');
}

$(document).ready(function () {
    setupDocument();
    var lastColumnState;
    var fillingPages = true;
    setTimeout(function () {
        while (fillingPages == true) {
            lastColumnState = $(".page:last .contents")[0].webkitRegionOverflow;
            if (lastColumnState == 'overflow') {
                $('#layout').append('<div class="page"><div class="contents"></div><div class="pagenumber"></div></div>');
            } else if (lastColumnState == 'fit' || lastColumnState == 'empty') {
                fillingPages = false;
            }
        }
    }, 1000);

});

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