96584 2012-09-12 17:49:22 -0700 Logic to not composite fixed elements outside the viewport is wrong 2012-10-02 08:53:29 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED DUPLICATE 98144 P2 Normal --- 1 simon.fraser wangxianzhu bdakin jamesr wangxianzhu oldest_to_newest 718928 0 163746 simon.fraser 2012-09-12 17:49:22 -0700 Created attachment 163746 Testcase RenderLayerCompositor::requiresCompositingForPosition() has: FrameView* frameView = m_renderView->frameView(); if (frameView && !layer->absoluteBoundingBox().intersects(IntRect(IntPoint(frameView->scrollOffsetForFixedPosition()), frameView->layoutSize()))) return false; This is incorrect, since the fixed element may have abs pos children that lie outside its bounds, but they can be visible in the viewport. 720034 1 163983 wangxianzhu 2012-09-13 15:36:16 -0700 Created attachment 163983 A working test case 732682 2 wangxianzhu 2012-10-02 08:53:29 -0700 *** This bug has been marked as a duplicate of bug 98144 *** 163746 2012-09-12 17:49:22 -0700 2012-09-12 17:49:22 -0700 Testcase fixed-position-out-of-view-abspos-child.html text/html 1151 simon.fraser PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgPHN0eWxlPgogICAgYm9keSB7CiAgICAg ICAgaGVpZ2h0OiAxMjAwcHg7CiAgICB9CgogICAgLmZpeGVkIHsKICAgICAgcG9zaXRpb246IGZp eGVkOwogICAgICB3aWR0aDogNTBweDsKICAgICAgaGVpZ2h0OiA1MHB4OwogICAgICBiYWNrZ3Jv dW5kLWNvbG9yOiBncmVlbjsKICAgIH0KICAgIAogICAgLmJveCB7CiAgICAgICAgcG9zaXRpb246 IGFic29sdXRlOwogICAgICAgIHRvcDogMTUwcHg7CiAgICAgICAgaGVpZ2h0OiAxMDBweDsKICAg ICAgICB3aWR0aDogMTAwcHg7CiAgICAgICAgYmFja2dyb3VuZC1jb2xvcjogYmx1ZTsKICAgIH0K ICA8L3N0eWxlPgoKICA8c2NyaXB0IHR5cGU9InRleHQvamF2YXNjcmlwdCI+CiAgICBpZiAod2lu ZG93LmxheW91dFRlc3RDb250cm9sbGVyKSB7CiAgICAgIGxheW91dFRlc3RDb250cm9sbGVyLmR1 bXBBc1RleHQoKTsKICAgICAgbGF5b3V0VGVzdENvbnRyb2xsZXIud2FpdFVudGlsRG9uZSgpOwoK ICAgICAgd2luZG93LmFkZEV2ZW50TGlzdGVuZXIoImxvYWQiLCBmdW5jdGlvbigpIHsKICAgICAg ICAvLyBUaW1lb3V0IHJlcXVpcmVkIGJlY2F1c2Ugc2V0dGluZyB1cCB0aGUgZml4ZWQgcG9zaXRp b24gbGF5b3V0IHJlY3QgaXMgYXN5bmMuCiAgICAgICAgd2luZG93LnNldFRpbWVvdXQoZnVuY3Rp b24oKSB7CiAgICAgICAgICBkb2N1bWVudC5nZXRFbGVtZW50QnlJZCgibGF5ZXJ0cmVlIikuaW5u ZXJUZXh0ID0gbGF5b3V0VGVzdENvbnRyb2xsZXIubGF5ZXJUcmVlQXNUZXh0KCk7CiAgICAgICAg ICBsYXlvdXRUZXN0Q29udHJvbGxlci5ub3RpZnlEb25lKCk7CiAgICAgICAgfSwgMTApOwogICAg ICB9LCBmYWxzZSk7CiAgICB9CiAgPC9zY3JpcHQ+CjwvaGVhZD4KCjxib2R5PgogIDxkaXYgc3R5 bGU9ImhlaWdodDogMTAwMHB4Ij4KICAgIDxwcmUgaWQ9ImxheWVydHJlZSI+PC9wcmU+CiAgPC9k aXY+CgogIDwhLS0gTmVpdGhlciBvZiB0aGUgZm9sbG93aW5nIGVsZW1lbnRzIHNob3VsZCBnZXQg aXRzIG93biBsYXllci4gLS0+CiAgPGRpdiBjbGFzcz0iZml4ZWQiIHN0eWxlPSJ0b3A6IC0xMDBw eCI+CiAgICAgIDxkaXYgY2xhc3M9ImJveCI+CiAgICAgIDwvZGl2PgogIDwvZGl2PgoKPC9ib2R5 Pgo8L2h0bWw+Cgo= 163983 2012-09-13 15:36:16 -0700 2012-09-13 15:36:16 -0700 A working test case fixed.html text/html 1231 wangxianzhu PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgPHN0eWxlPgogICAgYm9keSB7CiAgICAg ICAgaGVpZ2h0OiAxMjAwcHg7CiAgICB9CgogICAgLmZpeGVkIHsKICAgICAgcG9zaXRpb246IGZp eGVkOwogICAgICB3aWR0aDogNTBweDsKICAgICAgaGVpZ2h0OiA1MHB4OwogICAgICBiYWNrZ3Jv dW5kLWNvbG9yOiBncmVlbjsKICAgIH0KICAgIAogICAgLmJveCB7CiAgICAgIHBvc2l0aW9uOiBm aXhlZDsKICAgICAgdG9wOiAxNTBweDsKICAgICAgbGVmdDogMTAwcHg7CiAgICAgIGhlaWdodDog MTAwcHg7CiAgICAgIHdpZHRoOiAxMDBweDsKICAgICAgYmFja2dyb3VuZC1jb2xvcjogYmx1ZTsK ICAgIH0KICA8L3N0eWxlPgoKICA8c2NyaXB0IHR5cGU9InRleHQvamF2YXNjcmlwdCI+CiAgICBp ZiAod2luZG93LmludGVybmFscykKICAgICAgd2luZG93LmludGVybmFscy5zZXR0aW5ncy5zZXRF bmFibGVDb21wb3NpdGluZ0ZvckZpeGVkUG9zaXRpb24odHJ1ZSk7CgogICAgaWYgKHdpbmRvdy50 ZXN0UnVubmVyKSB7CiAgICAgIHRlc3RSdW5uZXIuZHVtcEFzVGV4dCgpOwogICAgICB0ZXN0UnVu bmVyLndhaXRVbnRpbERvbmUoKTsKCiAgICAgIHdpbmRvdy5hZGRFdmVudExpc3RlbmVyKCJsb2Fk IiwgZnVuY3Rpb24oKSB7CiAgICAgICAgLy8gVGltZW91dCByZXF1aXJlZCBiZWNhdXNlIHNldHRp bmcgdXAgdGhlIGZpeGVkIHBvc2l0aW9uIGxheW91dCByZWN0IGlzIGFzeW5jLgogICAgICAgIHdp bmRvdy5zZXRUaW1lb3V0KGZ1bmN0aW9uKCkgewogICAgICAgICAgZG9jdW1lbnQuZ2V0RWxlbWVu dEJ5SWQoImxheWVydHJlZSIpLmlubmVyVGV4dCA9IHRlc3RSdW5uZXIubGF5ZXJUcmVlQXNUZXh0 KCk7CiAgICAgICAgICB0ZXN0UnVubmVyLm5vdGlmeURvbmUoKTsKICAgICAgICB9LCAxMCk7CiAg ICAgIH0sIGZhbHNlKTsKICAgIH0KICA8L3NjcmlwdD4KPC9oZWFkPgoKPGJvZHk+CiAgPGRpdiBz dHlsZT0iaGVpZ2h0OiAxMDAwcHgiPgogICAgPHByZSBpZD0ibGF5ZXJ0cmVlIj48L3ByZT4KICA8 L2Rpdj4KCiAgPCEtLSBUaGlzIG91dC1vZi12aWV3IGVsZW1lbnQgc2hvdWxkIG5vdCBnZXQgaXRz IG93biBsYXllci4gLS0+CiAgPGRpdiBjbGFzcz0iZml4ZWQiIHN0eWxlPSJ0b3A6IC0xMDBweCI+ CiAgICA8IS0tIFRoaXMgb25lIHNob3VsZC4gLS0+CiAgICA8ZGl2IGNsYXNzPSJib3giPgogICAg PC9kaXY+CiAgPC9kaXY+Cgo8L2JvZHk+CjwvaHRtbD4KCg==