1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 2000 Simon Hausmann <hausmann@kde.org>
4 *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
5 * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB.  If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#include "config.h"
25#include "RenderPart.h"
26
27#include "Frame.h"
28#include "FrameView.h"
29#include "HTMLFrameElementBase.h"
30#include "PluginViewBase.h"
31#include "RenderView.h"
32
33namespace WebCore {
34
35RenderPart::RenderPart(Element* node)
36    : RenderWidget(node)
37{
38    setInline(false);
39}
40
41RenderPart::~RenderPart()
42{
43    clearWidget();
44}
45
46void RenderPart::setWidget(PassRefPtr<Widget> widget)
47{
48    if (widget == this->widget())
49        return;
50
51    RenderWidget::setWidget(widget);
52
53    // make sure the scrollbars are set correctly for restore
54    // ### find better fix
55    viewCleared();
56}
57
58void RenderPart::viewCleared()
59{
60}
61
62#if USE(ACCELERATED_COMPOSITING)
63bool RenderPart::requiresLayer() const
64{
65    if (RenderWidget::requiresLayer())
66        return true;
67
68    return requiresAcceleratedCompositing();
69}
70
71bool RenderPart::requiresAcceleratedCompositing() const
72{
73    // There are two general cases in which we can return true. First, if this is a plugin
74    // renderer and the plugin has a layer, then we need a layer. Second, if this is
75    // a renderer with a contentDocument and that document needs a layer, then we need
76    // a layer.
77    if (widget() && widget()->isPluginViewBase() && static_cast<PluginViewBase*>(widget())->platformLayer())
78        return true;
79
80    if (!node() || !node()->isFrameOwnerElement())
81        return false;
82
83#if PLATFORM(ANDROID)
84    // FIXME: Upstream this to webkit.org
85    // https://bugs.webkit.org/show_bug.cgi?id=52655
86    if (style()->visibility() != VISIBLE)
87        return false;
88#endif
89
90    HTMLFrameOwnerElement* element = static_cast<HTMLFrameOwnerElement*>(node());
91    if (Document* contentDocument = element->contentDocument()) {
92        if (RenderView* view = contentDocument->renderView())
93            return view->usesCompositing();
94    }
95
96    return false;
97}
98#endif
99
100}
101