RESOLVED FIXED 86528
implement new negative flexing algorithm 
https://bugs.webkit.org/show_bug.cgi?id=86528
Summary implement new negative flexing algorithm
Tony Chang
Reported 2012-05-15 14:25:55 PDT
Correct formula for the desired result: space-shortage = sum(flex-basis) - available-space shrink-factor = space-shortage / sum(flex-basis * negative-flex)) main-size = flex-basis * (1 - shrink-factor * negative-flex)) See http://lists.w3.org/Archives/Public/www-style/2012May/0291.html for a test case and some rationale.
Attachments
Patch (13.04 KB, patch)
2012-05-25 14:48 PDT, Tony Chang 		no flags
DetailsFormatted DiffDiff
Patch (14.94 KB, patch)
2012-05-25 15:53 PDT, Tony Chang 		no flags
DetailsFormatted DiffDiff
Patch for landing (14.98 KB, patch)
2012-05-25 16:05 PDT, Tony Chang 		no flags
DetailsFormatted DiffDiff
Show Obsolete (2) View All Add attachment proposed patch, testcase, etc.
Tony Chang
Comment 1 2012-05-25 14:48:15 PDT
Created attachment 144151 [details] Patch
Tony Chang
Comment 2 2012-05-25 14:48:44 PDT
The spec reflects this change as well.
Tony Chang
Comment 3 2012-05-25 14:51:51 PDT
Comment on attachment 144151 [details] Patch Actually, I can overflow and get into an infinite loop. Let me fix that first.
Tony Chang
Comment 4 2012-05-25 15:53:58 PDT
Created attachment 144161 [details] Patch
Ojan Vafai
Comment 5 2012-05-25 16:03:14 PDT
Comment on attachment 144161 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=144161&action=review > Source/WebCore/rendering/RenderFlexibleBox.cpp:876 > + if (availableFreeSpace > 0 && totalPositiveFlexibility > 0 && flexSign == PositiveFlexibility && isfinite(totalPositiveFlexibility)) > childSize += lroundf(availableFreeSpace * child->style()->positiveFlex() / totalPositiveFlexibility); > - else if (availableFreeSpace < 0 && totalNegativeFlexibility > 0 && flexSign == NegativeFlexibility) > - childSize += lroundf(availableFreeSpace * child->style()->negativeFlex() / totalNegativeFlexibility); > + else if (availableFreeSpace < 0 && totalWeightedNegativeFlexibility > 0 && flexSign == NegativeFlexibility && isfinite(totalWeightedNegativeFlexibility)) Might want to mention this isfinite check in the ChangeLog description.
Tony Chang
Comment 6 2012-05-25 16:05:29 PDT
Created attachment 144164 [details] Patch for landing
WebKit Review Bot
Comment 7 2012-05-25 19:07:34 PDT
Comment on attachment 144164 [details] Patch for landing Clearing flags on attachment: 144164 Committed r118600: <http://trac.webkit.org/changeset/118600>
WebKit Review Bot
Comment 8 2012-05-25 19:07:44 PDT
All reviewed patches have been landed. Closing bug.
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