51978 2011-01-05 20:48:12 -0800 Marquee inside table incorrectly sized 2012-04-20 06:51:00 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) All All NEW http://www.bankmuscat.com/ P2 Normal --- 1 tonyg webkit-unassigned arpitabahuguna jchaffraix macpherson menard webkit.review.bot oldest_to_newest 330003 0 78092 tonyg 2011-01-05 20:48:12 -0800 Created attachment 78092 Testcase 1. Visit http://www.bankmuscat.com/. 2. Notice there is a wide horizontal scroll in WebKit. 3. There is no horizontal scroll in FF4. This is caused by a <marquee> with wide content and white-space:nowrap inside of a <table>. Removing the white-space:nowrap or the table removes the horizontal scroll. See testcase. Originally filed in chromium as http://crbug.com/68612 598267 1 arpitabahuguna 2012-04-09 07:23:54 -0700 The issue seems to be not as much to do with the white-space or the table (holding the marquee) as it is to do with the overflow: hidden property set on it. WebKit currently sets the overflow CSS property either as hidden (if specified) or as marquee (if it is a marquee element with no overflow specified) or as any of the scroll, auto, visible property values. This causes our "marquee" setting to be overridden by "hidden" (if marquee element has been specified with the overflow: hidden property). Thus currently for the marquee element (with overflow: hidden) WebKit is not even creating the corresponding renderer. Shall do further study of the same and try to upload a patch for it shortly. 599157 2 136428 arpitabahuguna 2012-04-10 04:32:29 -0700 Created attachment 136428 Testcase for marquee with overflow property The attached testcase contains marquee elements with different overflow properties. Note that only the marquee elements with no overflow property specified are rendered properly. 605524 3 137888 arpitabahuguna 2012-04-19 05:54:48 -0700 Created attachment 137888 Patch 606011 4 137888 adele 2012-04-19 15:35:41 -0700 Comment on attachment 137888 Patch It seems a little weird to clobber the style like this. Although I guess we're already doing that a little. We could just make the html.css rule for marquee tags !important. 606118 5 137888 jchaffraix 2012-04-19 16:25:40 -0700 Comment on attachment 137888 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=137888&action=review > Source/WebCore/css/CSSStyleSelector.cpp:2030 > + if (e && e->hasTagName(marqueeTag)) { > style->setOverflowX(OMARQUEE); > - else if (style->overflowX() == OVISIBLE && style->overflowY() != OVISIBLE) > + style->setOverflowY(OMARQUEE); > + } That's plain wrong: by default, marquee has those set-up and we allow people to override them. Do you have any proof that this is actually breaking any website? If not, that's how it's implemented in WebKit and allowing people to override that is good! (like <div style="display:table-cell">). We do need to drop our overflow: -webkit-marquee extension to fix this bug properly but that's another story. 606551 6 jchaffraix 2012-04-20 06:51:00 -0700 For anyone trying to fix this, WebKit ties the marquee behavior to the overflow property (using a -webkit-marquee extension). This was done to match an older version of the specification that doesn't make sense anymore. The proper fix is to move the behavior to a -webkit-overflow-style to follow the new specification (www.w3.org/TR/css3-marquee/). We will also need to deprecate overflow: -webkit-marquee. 78092 2011-01-05 20:48:12 -0800 2011-01-05 20:48:12 -0800 Testcase marquee.html text/html 797 tonyg PHRhYmxlPgogICAgPHRyPgogICAgICAgIDx0ZD4KICAgICAgICAgICAgPG1hcnF1ZWUgc3R5bGU9 Im92ZXJmbG93OiBoaWRkZW47IHdoaXRlLXNwYWNlOiBub3dyYXA7Ij4KLi4uLi4uLi4uLi4uLi4u Li4uLi4gLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4gLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4gLi4u Li4uLi4uLi4uLi4uLi4uLi4uLiAuLi4uLi4uLi4uLi4uLgouLi4uLi4uLi4uLi4uLi4uLi4uLiAu Li4uLi4uLi4uLi4uLi4uLi4uLi4uLiAuLi4uLi4uLi4uLi4uLi4uLi4uLi4uLiAuLi4uLi4uLi4u Li4uLi4uLi4uLi4uIC4uLi4uLi4uLi4uLi4uCi4uLi4uLi4uLi4uLi4uLi4uLi4uIC4uLi4uLi4u Li4uLi4uLi4uLi4uLi4uIC4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uIC4uLi4uLi4uLi4uLi4uLi4u Li4uLi4gLi4uLi4uLi4uLi4uLi4KLi4uLi4uLi4uLi4uLi4uLi4uLi4gLi4uLi4uLi4uLi4uLi4u Li4uLi4uLi4gLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4gLi4uLi4uLi4uLi4uLi4uLi4uLi4uLiAu Li4uLi4uLi4uLi4uLgouLi4uLi4uLi4uLi4uLi4uLi4uLiAuLi4uLi4uLi4uLi4uLi4uLi4uLi4u 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