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
33 namespace WebCore {
34
RenderPart(Element * node)35 RenderPart::RenderPart(Element* node)
36 : RenderWidget(node)
37 {
38 setInline(false);
39 }
40
~RenderPart()41 RenderPart::~RenderPart()
42 {
43 clearWidget();
44 }
45
setWidget(PassRefPtr<Widget> widget)46 void 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
viewCleared()58 void RenderPart::viewCleared()
59 {
60 }
61
62 #if USE(ACCELERATED_COMPOSITING)
requiresLayer() const63 bool RenderPart::requiresLayer() const
64 {
65 if (RenderWidget::requiresLayer())
66 return true;
67
68 return requiresAcceleratedCompositing();
69 }
70
requiresAcceleratedCompositing() const71 bool 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