[Webkit-unassigned] [Bug 59821] New: [GTK] Untangle GtkAdjustments from WebCore

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=59821

           Summary: [GTK] Untangle GtkAdjustments from WebCore
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P3
         Component: WebKit Gtk
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mrobinson at webkit.org
                CC: xan.lopez at gmail.com, gns at gnome.org


Currently GTK+ adjustments are attached to three places in WebKit: the WebKitWebView, the main frame ScrollView and main frame Scrollbars. The lifetime of main frame ScrollViews and Scrollbars is different than that of the WebKitWebView. 

* Scrollbars, in particular, may be created and destroyed hundreds of times during window resizes (if opaque resizing is enabled in the window manager).
* In the past, we have had many bugs and crashes due to not updating the GTK+ adjustments properly when ScrollViews appear and disappear.

Both of these issues stem from the fact that we are attaching something with a very long lifetime (the GtkAdjustment) to something with a much shorter lifetime (Scrollbars/ScrollView). Instead of letting WebCore deal directly with the GtkAdjustments, I propose that we simply let WebKit worry about them and attach them to the ChromeClient.

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