1 files changed, 111 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderPart.cpp b/Source/WebCore/rendering/RenderPart.cpp
new file mode 100644
index 000000000..92fcf5d85
--- /dev/null
+++ b/Source/WebCore/rendering/RenderPart.cpp
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 2000 Simon Hausmann <hausmann@kde.org>
+ *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
+ * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) Research In Motion Limited 2011. 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
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "RenderPart.h"
+
+#include "Frame.h"
+#include "FrameView.h"
+#include "HTMLFrameElementBase.h"
+#include "PluginViewBase.h"
+#include "RenderSVGRoot.h"
+#include "RenderView.h"
+
+using namespace std;
+
+namespace WebCore {
+
+RenderPart::RenderPart(Element* node)
+    : RenderWidget(node)
+{
+    setInline(false);
+}
+
+RenderPart::~RenderPart()
+{
+    clearWidget();
+}
+
+void RenderPart::setWidget(PassRefPtr<Widget> widget)
+{
+    if (widget == this->widget())
+        return;
+
+    RenderWidget::setWidget(widget);
+
+    // make sure the scrollbars are set correctly for restore
+    // ### find better fix
+    viewCleared();
+}
+
+void RenderPart::viewCleared()
+{
+}
+
+#if USE(ACCELERATED_COMPOSITING)
+bool RenderPart::requiresLayer() const
+{
+    if (RenderWidget::requiresLayer())
+        return true;
+    
+    return requiresAcceleratedCompositing();
+}
+
+bool RenderPart::requiresAcceleratedCompositing() const
+{
+    // There are two general cases in which we can return true. First, if this is a plugin 
+    // renderer and the plugin has a layer, then we need a layer. Second, if this is 
+    // a renderer with a contentDocument and that document needs a layer, then we need
+    // a layer.
+    if (widget() && widget()->isPluginViewBase() && static_cast<PluginViewBase*>(widget())->platformLayer())
+        return true;
+
+    if (!node() || !node()->isFrameOwnerElement())
+        return false;
+
+    HTMLFrameOwnerElement* element = static_cast<HTMLFrameOwnerElement*>(node());
+    if (Document* contentDocument = element->contentDocument()) {
+        if (RenderView* view = contentDocument->renderView())
+            return view->usesCompositing();
+    }
+
+    return false;
+}
+#endif
+
+bool RenderPart::needsPreferredWidthsRecalculation() const
+{
+    if (RenderWidget::needsPreferredWidthsRecalculation())
+        return true;
+    return embeddedContentBox();
+}
+
+RenderBox* RenderPart::embeddedContentBox() const
+{
+    if (!node() || !widget() || !widget()->isFrameView())
+        return 0;
+    return static_cast<FrameView*>(widget())->embeddedContentBox();
+}
+
+}