Implement closed shadow adjustment for Element.offsetParent

third_party/WebKit/Source/core/html/HTMLElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004-2008, 2013, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 36 matching lines @@
 #include "core/events/KeyboardEvent.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMenuElement.h"
 #include "core/html/HTMLTemplateElement.h"
 #include "core/html/HTMLTextFormControlElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
+#include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/LayoutObject.h"
 #include "core/page/SpatialNavigation.h"
 #include "platform/Language.h"
 #include "platform/text/BidiResolver.h"
 #include "platform/text/BidiTextRun.h"
 #include "platform/text/TextRunIterator.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/CString.h"
 
 namespace blink {
@@ skipping 977 matching lines @@
         event->setDefaultHandled();
     }
 }
 
 const AtomicString& HTMLElement::eventParameterName()
 {
     DEFINE_STATIC_LOCAL(const AtomicString, eventString, ("event"));
     return eventString;
 }
 
+int HTMLElement::offsetLeftForBinding()
+{
+    document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);
+    if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
+        return adjustLayoutUnitForAbsoluteZoom(LayoutUnit(layoutObject->pixelSnappedOffsetLeft(unclosedOffsetParent())), layoutObject->styleRef()).round();
+    return 0;
+}
+
+int HTMLElement::offsetTopForBinding()
+{
+    document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);
+    if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
+        return adjustLayoutUnitForAbsoluteZoom(LayoutUnit(layoutObject->pixelSnappedOffsetTop(unclosedOffsetParent())), layoutObject->styleRef()).round();
+    return 0;
+}
+
+int HTMLElement::offsetWidthForBinding()
+{
+    document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);
+    if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
+        return adjustLayoutUnitForAbsoluteZoom(LayoutUnit(layoutObject->pixelSnappedOffsetWidth(unclosedOffsetParent())), layoutObject->styleRef()).round();
+    return 0;
+}
+
+int HTMLElement::offsetHeightForBinding()
+{
+    document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);
+    if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
+        return adjustLayoutUnitForAbsoluteZoom(LayoutUnit(layoutObject->pixelSnappedOffsetHeight(unclosedOffsetParent())), layoutObject->styleRef()).round();
+    return 0;
+}
+
+Element* HTMLElement::unclosedOffsetParent()
+{
+    document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);
+
+    LayoutObject* layoutObject = this->layoutObject();
+    if (!layoutObject)
+        return nullptr;
+
+    return layoutObject->offsetParent(this);
+}
+
 } // namespace blink
 
 #ifndef NDEBUG
 
 // For use in the debugger
 void dumpInnerHTML(blink::HTMLElement*);
 
 void dumpInnerHTML(blink::HTMLElement* element)
 {
     printf("%s\n", element->innerHTML().ascii().data());
 }
 #endif