74749 2011-12-16 14:30:10 -0800 Runtime changes to requiredExtensions don't update the enclosing <switch> 2014-01-13 01:22:31 -0800 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) Unspecified Unspecified ASSIGNED InRadar P2 Normal --- 88188 1 thorton webkit-unassigned dglazkov eric fred.wang pdr schenney webkit.review.bot zimmermann oldest_to_newest 523031 0 119671 thorton 2011-12-16 14:30:10 -0800 Created attachment 119671 repro The attached repro demonstrates that removing an extension requirement (requiredExtensions attribute) at runtime doesn't affect a <switch> which had previously used that attribute to skip over an element. <rdar://problem/10582174> 524113 1 119901 thorton 2011-12-19 12:26:23 -0800 Created attachment 119901 repro (first one was broken) 524801 2 120073 thorton 2011-12-20 13:55:46 -0800 Created attachment 120073 patch 524802 3 thorton 2011-12-20 13:56:19 -0800 Also removes a related comment in SVGSwitchElement which to my eye looks completely false. 525026 4 120073 webkit.review.bot 2011-12-20 18:11:28 -0800 Comment on attachment 120073 patch Attachment 120073 did not pass chromium-ews (chromium-xvfb): Output: http://queues.webkit.org/results/10992386 New failing tests: http/tests/inspector/resource-tree/resource-tree-document-url.html 525088 5 thorton 2011-12-20 21:35:57 -0800 (In reply to comment #4) > (From update of attachment 120073 [details]) > Attachment 120073 [details] did not pass chromium-ews (chromium-xvfb): > Output: http://queues.webkit.org/results/10992386 > > New failing tests: > http/tests/inspector/resource-tree/resource-tree-document-url.html That seems exceedingly unlikely. 525178 6 120073 zimmermann 2011-12-21 01:07:21 -0800 Comment on attachment 120073 patch View in context: https://bugs.webkit.org/attachment.cgi?id=120073&action=review Great catches, I still have some questions: > LayoutTests/svg/custom/requiredExtensions-runtime-changes.svg:36 > + var removeElements = document.getElementsByClassName("removeRequiredExtensions"); > + var addElements = document.getElementsByClassName("addRequiredExtensions"); Clever idea, I keep that in mind for further tests of mine :-) Makes the test itself much more readable/hackable. > Source/WebCore/ChangeLog:10 > + SVGStringList, because SVGStringList::reset() adds a single empty string to the list. Good catch - but I can't recall why reset() behaves this way. Can we just change the behavior of reset? > Source/WebCore/ChangeLog:13 > + Invalid elements inside <switch> are prevented from creating renderers, > + but are still attached; SVGTests assumes that invalid elements will always be detached. Why is this? I assumed that attached() returns false, if there's no renderer. I just checked the code, and indeed this assumption is just wrong. We're differentiating between two states in dom/Node.cpp (see attach()): * attach() called no renderer created: attached() returns true and renderer() zero. * attach() called renderer got created: attached() returns true and renderer() non-zero. Does anyone know where exactly the former is needed? When reading common code in eg. ContainerNode, it seems attached() is used to check whether the elements was attached to the rendering tree (which is what I assumed): ... // Add child to the rendering tree. if (attached() && !child->attached() && child->parentNode() == this) { if (shouldLazyAttach) child->lazyAttach(); else ... // Remove from rendering tree if (oldChild->attached()) oldChild->detach(); ... If theres a need to differentiate between those states, I'm fine with your approach, otherwise we should rethink it. 525337 7 thorton 2011-12-21 10:44:13 -0800 (In reply to comment #6) > (From update of attachment 120073 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=120073&action=review > > Great catches, I still have some questions: > > > LayoutTests/svg/custom/requiredExtensions-runtime-changes.svg:36 > > + var removeElements = document.getElementsByClassName("removeRequiredExtensions"); > > + var addElements = document.getElementsByClassName("addRequiredExtensions"); > > Clever idea, I keep that in mind for further tests of mine :-) Makes the test itself much more readable/hackable. > > > Source/WebCore/ChangeLog:10 > > + SVGStringList, because SVGStringList::reset() adds a single empty string to the list. > > Good catch - but I can't recall why reset() behaves this way. Can we just change the behavior of reset? I'd love to! I couldn't come up with a good reason (as it stands, this makes the empty-hasn't-been-touched list and the empty-was-touched-but-got-cleared list different, and I can't see a good reason for that, at all). > > Source/WebCore/ChangeLog:13 > > + Invalid elements inside <switch> are prevented from creating renderers, > > + but are still attached; SVGTests assumes that invalid elements will always be detached. > > Why is this? I assumed that attached() returns false, if there's no renderer. > I just checked the code, and indeed this assumption is just wrong. > > We're differentiating between two states in dom/Node.cpp (see attach()): > * attach() called no renderer created: attached() returns true and renderer() zero. > * attach() called renderer got created: attached() returns true and renderer() non-zero. > > Does anyone know where exactly the former is needed? > > When reading common code in eg. ContainerNode, it seems attached() is used to check whether the elements was attached to the rendering tree (which is what I assumed): > ... > // Add child to the rendering tree. > if (attached() && !child->attached() && child->parentNode() == this) { > if (shouldLazyAttach) > child->lazyAttach(); > else > ... > > // Remove from rendering tree > if (oldChild->attached()) > oldChild->detach(); > ... > > If theres a need to differentiate between those states, I'm fine with your approach, otherwise we should rethink it. I have no idea if there's a reason for this. I assumed there was, and just wanted to make our assumptions fit. Do you know who might know? 932183 8 212362 fred.wang 2013-09-23 10:33:31 -0700 Created attachment 212362 testcase Here is another testcase. I can help with fixing that bug, since it is similar to the implementation of maction/semantics I'm currently working on. 932193 9 fred.wang 2013-09-23 10:48:34 -0700 So more precisely: - update to <switch> when foreignObject@requiredExtensions changes is similar to update to <semantics> when annotation-xml@encoding changes (bug 100626) - update to <switch> when its children or attributes change is similar to what I have done to update <semantics>/<maction> (bug 120058) 964635 10 fred.wang 2014-01-06 08:46:57 -0800 Finally this will be a bit more complicated than the MathML case, since SVG attributes can be animated. So I don't think I'll spend some time on it in the short term. 119671 2011-12-16 14:30:10 -0800 2011-12-19 12:26:23 -0800 repro reduced.xhtml application/xhtml+xml 1327 thorton PGh0bWwgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGh0bWwiPiAgIAo8Ym9keT4KPHN2 ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8v d3d3LnczLm9yZy8xOTk5L3hsaW5rIiB3aWR0aD0iMzAwIiBoZWlnaHQ9IjYwMCI+CiAgICA8dGV4 dCB5PSIyMCI+VGhlIHNoYXBlcyBzaG91bGQgYmUgaWRlbnRpY2FsIGFmdGVyIGxvYWQuPC90ZXh0 PgogICAgPGcgaWQ9InN2Z3N0YXIiIHRyYW5zZm9ybT0idHJhbnNsYXRlKDEwMCwgMTUwKSI+CiAg ICAgICAgPHN3aXRjaD4KICAgICAgICAgICAgPHBhdGggZmlsbD0iYmxhY2siIG9wYWNpdHk9IjAu NCIgZD0iTS01MCwtMTAgTDUwLC0xMCBMNTAsMTAgTC01MCwxMCBaIiB0cmFuc2Zvcm09InJvdGF0 ZSg0NSkiIC8+CiAgICAgICAgICAgIDxwYXRoIGZpbGw9ImJsYWNrIiBvcGFjaXR5PSIwLjQiIGQ9 Ik0tNTAsLTEwIEw1MCwtMTAgTDUwLDEwIEwtNTAsMTAgWiIgdHJhbnNmb3JtPSJyb3RhdGUoOTAp IiAvPgogICAgICAgIDwvc3dpdGNoPgogICAgPC9nPgogICAgCiAgICA8ZyBpZD0ic3Znc3RhciIg 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