Support script modify iframe scrolling, marginWidth and marginHeight attr

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. 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 123 matching lines @@
     }
   } else if (name == srcAttr && !fastHasAttribute(srcdocAttr)) {
     setLocation(stripLeadingAndTrailingHTMLSpaces(value));
   } else if (name == idAttr) {
     // Important to call through to base for the id attribute so the hasID bit
     // gets set.
     HTMLFrameOwnerElement::parseAttribute(name, oldValue, value);
     m_frameName = value;
   } else if (name == nameAttr) {
     m_frameName = value;
-    // FIXME: If we are already attached, this doesn't actually change the
-    // frame's name.
-    // FIXME: If we are already attached, this doesn't check for frame name
-    // conflicts and generate a unique frame name.
   } else if (name == marginwidthAttr) {
     setMarginWidth(value.toInt());
-    // FIXME: If we are already attached, this has no effect.
   } else if (name == marginheightAttr) {
     setMarginHeight(value.toInt());
-    // FIXME: If we are already attached, this has no effect.
   } else if (name == scrollingAttr) {
     // Auto and yes both simply mean "allow scrolling." No means "don't allow
     // scrolling."
     if (equalIgnoringCase(value, "auto") || equalIgnoringCase(value, "yes"))
       setScrollingMode(ScrollbarAuto);
     else if (equalIgnoringCase(value, "no"))
       setScrollingMode(ScrollbarAlwaysOff);
-    // FIXME: If we are already attached, this has no effect.
   } else if (name == onbeforeunloadAttr) {
     // FIXME: should <frame> elements have beforeunload handlers?
     setAttributeEventListener(
         EventTypeNames::beforeunload,
         createAttributeEventListener(this, name, value, eventParameterName()));
   } else {
     HTMLFrameOwnerElement::parseAttribute(name, oldValue, value);
   }
 }
 
@@ skipping 74 matching lines @@
 // process. See http://crbug.com/339659.
 void HTMLFrameElementBase::defaultEventHandler(Event* event) {
   if (contentFrame() && contentFrame()->isRemoteFrame()) {
     toRemoteFrame(contentFrame())->forwardInputEvent(event);
     return;
   }
   HTMLFrameOwnerElement::defaultEventHandler(event);
 }
 
 void HTMLFrameElementBase::setScrollingMode(ScrollbarMode scrollbarMode) {
+  if (m_scrollingMode == scrollbarMode)
+    return;
+
+  if (contentDocument()) {
+    contentDocument()->willChangeFrameOwnerProperties(
+        m_marginWidth, m_marginHeight, scrollbarMode);
+  }
   m_scrollingMode = scrollbarMode;
   frameOwnerPropertiesChanged();
 }
 
 void HTMLFrameElementBase::setMarginWidth(int marginWidth) {
+  if (m_marginWidth == marginWidth)
+    return;
+
+  if (contentDocument()) {
+    contentDocument()->willChangeFrameOwnerProperties(
+        marginWidth, m_marginHeight, m_scrollingMode);
+  }
   m_marginWidth = marginWidth;
   frameOwnerPropertiesChanged();
 }
 
 void HTMLFrameElementBase::setMarginHeight(int marginHeight) {
+  if (m_marginHeight == marginHeight)
+    return;
+
+  if (contentDocument()) {
+    contentDocument()->willChangeFrameOwnerProperties(
+        m_marginWidth, marginHeight, m_scrollingMode);
+  }
   m_marginHeight = marginHeight;
   frameOwnerPropertiesChanged();
 }
 
 }  // namespace blink