81423 2012-03-16 15:43:01 -0700 getIntersectionList always returns empty NodeList until layout is complete 2017-02-08 15:17:37 -0800 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) PC Windows 7 RESOLVED FIXED P2 Normal --- 1 okozlo sabouhallawa commit-queue dtrebbien mvujovic sabouhallawa sam schenney simon.fraser thorton zimmermann oldest_to_newest 581054 0 132406 okozlo 2012-03-16 15:43:01 -0700 Created attachment 132406 Repro case Steps to reproduce: 1. Open attached mininmal repro (svg_getIntersectionList_CTM.html). This repro sets up a simple scene (rectangle at origin) and calls getIntersectionList multiple times, resulting in an empty NodeList (expected behavoir is to return the rectangle element). Calling getScreenCTM() (note: this can be called on either the root SVGSVGElement or the SVGRect) and calling getIntersectionList now returns the correct result. Correct behaviour under IE9 and Opera. 581807 1 zimmermann 2012-03-19 08:05:16 -0700 Bug confirmed. I see following on debug builds: ASSERTION FAILED: !fixed /Users/nzimmermann/Coding/WebKit/Source/WebCore/rendering/svg/RenderSVGRoot.cpp(370) : virtual void WebCore::RenderSVGRoot::mapLocalToContainer(WebCore::RenderBoxModelObject *, bool, bool, WebCore::TransformState &, bool *) const 1 0x11050393e WebCore::RenderSVGRoot::mapLocalToContainer(WebCore::RenderBoxModelObject*, bool, bool, WebCore::TransformState&, bool*) const 2 0x1104b22cc WebCore::RenderObject::localToAbsolute(WebCore::FloatPoint const&, bool, bool) const 3 0x11044f37b WebCore::RenderLayer::convertToLayerCoords(WebCore::RenderLayer const*, WebCore::IntPoint&) const 4 0x11044fa9d WebCore::RenderLayer::updateLayerPositions(WebCore::IntPoint*, unsigned int) 5 0x11044fee9 WebCore::RenderLayer::updateLayerPositions(WebCore::IntPoint*, unsigned int) 6 0x11044fee9 WebCore::RenderLayer::updateLayerPositions(WebCore::IntPoint*, unsigned int) 7 0x10f85d074 WebCore::FrameView::layout(bool) 8 0x10f555f96 WebCore::Document::updateLayout() 9 0x10f5560c5 WebCore::Document::updateLayoutIgnorePendingStylesheets() 10 0x11081c1f2 WebCore::SVGLocatable::computeCTM(WebCore::SVGElement*, WebCore::SVGLocatable::CTMScope, WebCore::SVGLocatable::StyleUpdateStrategy) 11 0x11087ccdf WebCore::SVGStyledLocatableElement::getScreenCTM(WebCore::SVGLocatable::StyleUpdateStrategy) 12 0x11009302f WebCore::jsSVGSVGElementPrototypeFunctionGetScreenCTM(JSC::ExecState*) 13 0x4f42d3a01258 14 0x10e6ec7b9 JSC::JITCode::execute(JSC::RegisterFile*, JSC::ExecState*, JSC::JSGlobalData*) 15 0x10e6e9278 JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) 16 0x10e5a3f0b JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) 17 0x10fc17f63 WebCore::JSMainThreadExecState::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) 18 0x10fd5a5af WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*) 19 0x10f799459 WebCore::EventTarget::fireEventListeners(WebCore::Event*, WebCore::EventTargetData*, WTF::Vector<WebCore::RegisteredEventListener, 1ul>&) 20 0x10f79929b WebCore::EventTarget::fireEventListeners(WebCore::Event*) 21 0x1102750bb WebCore::Node::handleLocalEvents(WebCore::Event*) 22 0x10f76b9d9 WebCore::EventDispatcher::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) 23 0x10f76f3ac WebCore::EventDispatchMediator::dispatchEvent(WebCore::EventDispatcher*) const 24 0x10f76ac1a WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::EventDispatchMediator>) 25 0x1102751b6 WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) 26 0x10f5617de WebCore::Document::finishedParsing() 27 0x10fa25ea4 WebCore::HTMLTreeBuilder::finished() 28 0x10f94f8d3 WebCore::HTMLDocumentParser::end() 29 0x10f94e7f6 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd() 30 0x10f94e5cc WebCore::HTMLDocumentParser::prepareToStopParsing() 31 0x10f94f081 WebCore::HTMLDocumentParser::endIfDelayed() 581820 2 zimmermann 2012-03-19 08:18:32 -0700 CC'ing Max who might be interested in this bug. 596855 3 mvujovic 2012-04-05 13:32:14 -0700 (In reply to comment #2) > CC'ing Max who might be interested in this bug. Hi Niko, It does look like an interesting bug :). Unfortunately, I don't think I'll get to it anytime soon. I've been completely wrapped up in CSS shaders work recently, so anybody is welcome to pick it up as far as I'm concerned. 1274516 4 300941 sabouhallawa 2017-02-08 12:55:03 -0800 Created attachment 300941 reduced test case 1274517 5 300942 sabouhallawa 2017-02-08 13:00:27 -0800 Created attachment 300942 Patch 1274522 6 sabouhallawa 2017-02-08 13:04:58 -0800 First of all the assertion is not related to this bug. And it is covered by https://bugs.webkit.org/show_bug.cgi?id=31278. I attached a reduced test case which does not hit the assertion and still can show the bug. The bug happens because getIntersectionList() is called before running the layout. getScreenCTM() happens to force layout. Other calls like root.getBoundingClientRect() or document.body.offsetWidth can do the same thing. The fix can be simply done by calling document().updateLayoutIgnorePendingStylesheets() from SVGSVGElement::getIntersectionList(). We call the same API from the DOM API Element::getBoundingClientRect(). 1274600 7 300942 commit-queue 2017-02-08 15:17:31 -0800 Comment on attachment 300942 Patch Clearing flags on attachment: 300942 Committed r211905: <http://trac.webkit.org/changeset/211905> 1274601 8 commit-queue 2017-02-08 15:17:37 -0800 All reviewed patches have been landed. Closing bug. 132406 2012-03-16 15:43:01 -0700 2012-03-16 15:43:01 -0700 Repro case svg_getIntersectionList_CTM.html text/html 2148 okozlo PGh0bWw+DQogICAgPGhlYWQ+DQogICAgICAgIDxtZXRhIGh0dHAtZXF1aXY9IlgtVUEtQ29tcGF0 aWJsZSIgY29udGVudD0iSUU9ZWRnZSI+PC9tZXRhPg0KICAgICAgICA8c2NyaXB0IHNyYz0iaHR0 cDovL2FqYXguYXNwbmV0Y2RuLmNvbS9hamF4L2pxdWVyeS9qcXVlcnktMS43LjEubWluLmpzIiB0 eXBlPSJ0ZXh0L2phdmFzY3JpcHQiPjwvc2NyaXB0Pg0KICAgICAgICANCiAgICAgICAgPHNjcmlw dCB0eXBlPSJ0ZXh0L2phdmFzY3JpcHQiPg0KICAgICAgICAgICAgJChkb2N1bWVudCkucmVhZHko ZnVuY3Rpb24oKSB7DQogICAgICAgICAgICAgICAgdmFyIHJvb3QgPSBkb2N1bWVudC5jcmVhdGVF bGVtZW50TlMoImh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiwgInN2ZyIpOw0KICAgICAgICAg ICAgICAgIHJvb3Quc2V0QXR0cmlidXRlKCJzdHlsZSIsICJwb3NpdGlvbjogZml4ZWQ7IHRvcDog MDsgbGVmdDogMCIpOw0KICAgICAgICAgICAgICAgIGRvY3VtZW50LmJvZHkuYXBwZW5kQ2hpbGQo cm9vdCk7DQogICAgICAgICAgICAgICAgDQogICAgICAgICAgICAgICAgdmFyIHJlY3QgPSByb290 LmFwcGVuZENoaWxkKGRvY3VtZW50LmNyZWF0ZUVsZW1lbnROUygiaHR0cDovL3d3dy53My5vcmcv 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