[Webkit-unassigned] [Bug 81209] Consistent resize events in mobile browsers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81209





--- Comment #1 from Kenneth Rohde Christiansen <kenneth at webkit.org>  2012-03-15 06:17:21 PST ---
It would be great with a method for getting the scroll bar sizes. It would be useful for this and it will be useful for innerWidth etc as well.

This should be easy on most platform (using webkit for drawing scrollbars), but might be a bit more complicated on Mac and GTK, though looking at the documentation it seems doable.

Passing some pseudo code here for inspiration and because something might know of better ways of doing this.

Mac:

double horizontalScrollbarWidth()
{
    BEGIN_BLOCK_OBJC_EXCEPTIONS;
    CGFloat width = 0;

    NSScrollView* view = NSScrollView<WebCoreFrameScrollView> *>(platformWidget());
    if (view->hasHorizontalScroller())
        width = view->horizontalScroller()->scrollerWidth();
    END_BLOCK_OBJC_EXCEPTIONS;
}

And GTK+:

double horizontalScrollbarWidth()
{
   if (!shouldCreateMainFrameScrollbar(this)
      fallback to webcore scrollbars

   GtkWidget* measuredWidget = hostWindow()->platformPageClient();
   GtkWidget* parentWidget = gtk_widget_get_parent(measuredWidget)

   if (!parentWidget)
       return 0;

   GtkWidget* sb = gtk_scrolled_window_get_hscrollbar(GTK_SCROLLED_WINDOW(parentWidget));
   if (!sb)
      return 0;

   GtkAllocation allocation;
   gtk_widget_get_allocation(sb, &allocation);

   return allocation.width;
}

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