41282 2010-06-28 09:51:45 -0700 permanent mouse grab after clicking to image 2015-05-07 17:13:35 -0700 1 1 1 Unclassified WebKit WebKitGTK 528+ (Nightly build) All Linux RESOLVED FIXED P2 Major --- 0 sbrabec webkit-unassigned mrobinson oldest_to_newest 243738 0 sbrabec 2010-06-28 09:51:45 -0700 The browser sometimes permanently enters to a mouse grab mode. It happens after clicking to an image inside a web page. How to reproduce: Wobble with your mouse quicky and very shortly click to any image on any web page. Different cursor indicating manipulation with the image appears and stays forever after mouse button release. Browser has mouse grab and it is impossible to leave the application, click anywhere or so. Does it appear every time: No it appears only sometimes. It is easily reproducible on slow machines (PDA) and hardly on slower desktop systems. The problem was reproduced on: Linux openSUSE 11.3 RC1 x86_64, epiphany-2.30.2 libwebkit-1.2.0 (user agent 531.2) Linux Angstrom ARM (PXA270, armv5tel), midori-0.2.2, libwebkit-1.1.18 (svnr53071) Work-around that works on both midori and epiphany: Press Ctrl+L, go to the end of the URL, type any letter, wait for URL completion pop-up. This operation releases mouse grab. 243750 1 59906 sbrabec 2010-06-28 10:19:37 -0700 Created attachment 59906 backtrace of epiphany in the mouse grab (done from text console) 248218 2 60886 sbrabec 2010-07-08 08:24:59 -0700 Created attachment 60886 gdb backtrace at gdk_pointer_grab breakpoint Backtrace when breakpoint is set to gdk_pointer_grab() and gdb is running on a different display. With gdb, the race can be easily reproduced: When starting grab, gdk_pointer_grab is called twice. If you ensure, that the second breakpoint is executed after mouse button release, the problem occurs. How to reproduce: 1. Run gdb on a second machine and set breakpoint to gdk_pointer_grab 2. Shortly drag any image or link and release. 3. In gdb do: bt cont bt cont Actual result: browser runs, drag is finished, but the browser still has a mouse grab. 248317 3 sbrabec 2010-07-08 10:37:45 -0700 After a deeper analysis it looks like a gtk+ bug. Reporting as https://bugzilla.gnome.org/show_bug.cgi?id=623865 253776 4 sbrabec 2010-07-20 09:52:24 -0700 The bug is confirmed as an GTK+ problem, but there is an issue that may be addressed in webkit: DragClient::startDrag() may be interested in the system event details that triggered the drag. It could affect the toolkit behavior. Constructing of an artificial event instead of use operating system event is just a work-around. 1092876 5 mrobinson 2015-05-07 17:13:35 -0700 Seems this was a GTK+ issue. 59906 2010-06-28 10:19:37 -0700 2010-06-28 10:20:27 -0700 backtrace of epiphany in the mouse grab (done from text console) epiphany.gdb text/plain 3135 sbrabec VGhyZWFkIDYgKFRocmVhZCAweDdmYTlkYzRmMDcxMCAoTFdQIDM4ODcpKToKIzAgIHB0aHJlYWRf Y29uZF93YWl0QEBHTElCQ18yLjMuMiAoKSBhdCAuLi9ucHRsL3N5c2RlcHMvdW5peC9zeXN2L2xp bnV4L3g4Nl82NC9wdGhyZWFkX2NvbmRfd2FpdC5TOjE2MgojMSAgMHgwMDAwN2ZhOWYxNDc1MzM0 IGluIFdURjo6VENNYWxsb2NfUGFnZUhlYXA6OnNjYXZlbmdlclRocmVhZCAodGhpcz0weDdmYTlm MWQ2YTA2MCkgYXQgSmF2YVNjcmlwdENvcmUvd3RmL0Zhc3RNYWxsb2MuY3BwOjIzNzgKIzIgIDB4 MDAwMDdmYTlmMTQ3NTM1OSBpbiBXVEY6OlRDTWFsbG9jX1BhZ2VIZWFwOjpydW5TY2F2ZW5nZXJU aHJlYWQgKGNvbnRleHQ9MHg3ZmE5ZjFkNzgxMzQpIGF0IEphdmFTY3JpcHRDb3JlL3d0Zi9GYXN0 TWFsbG9jLmNwcDoxNDk3CiMzICAweDAwMDA3ZmE5ZWUxZjRhNGYgaW4gc3RhcnRfdGhyZWFkIChh 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