1/*
2 * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#include "config.h"
22
23#include "core/svg/SVGGElement.h"
24
25#include "core/SVGNames.h"
26#include "core/rendering/svg/RenderSVGHiddenContainer.h"
27#include "core/rendering/svg/RenderSVGResource.h"
28#include "core/rendering/svg/RenderSVGTransformableContainer.h"
29
30namespace blink {
31
32inline SVGGElement::SVGGElement(Document& document, ConstructionType constructionType)
33    : SVGGraphicsElement(SVGNames::gTag, document, constructionType)
34{
35}
36
37DEFINE_NODE_FACTORY(SVGGElement)
38
39RenderObject* SVGGElement::createRenderer(RenderStyle* style)
40{
41    // SVG 1.1 testsuite explicitely uses constructs like <g display="none"><linearGradient>
42    // We still have to create renderers for the <g> & <linearGradient> element, though the
43    // subtree may be hidden - we only want the resource renderers to exist so they can be
44    // referenced from somewhere else.
45    if (style->display() == NONE)
46        return new RenderSVGHiddenContainer(this);
47
48    return new RenderSVGTransformableContainer(this);
49}
50
51bool SVGGElement::rendererIsNeeded(const RenderStyle&)
52{
53    // Unlike SVGElement::rendererIsNeeded(), we still create renderers, even if
54    // display is set to 'none' - which is special to SVG <g> container elements.
55    return parentOrShadowHostElement() && parentOrShadowHostElement()->isSVGElement();
56}
57
58}
59