1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 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/SVGFEOffsetElement.h"
24
25#include "core/SVGNames.h"
26#include "platform/graphics/filters/FilterEffect.h"
27#include "core/svg/graphics/filters/SVGFilterBuilder.h"
28
29namespace WebCore {
30
31inline SVGFEOffsetElement::SVGFEOffsetElement(Document& document)
32    : SVGFilterPrimitiveStandardAttributes(SVGNames::feOffsetTag, document)
33    , m_dx(SVGAnimatedNumber::create(this, SVGNames::dxAttr, SVGNumber::create()))
34    , m_dy(SVGAnimatedNumber::create(this, SVGNames::dyAttr, SVGNumber::create()))
35    , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
36{
37    ScriptWrappable::init(this);
38
39    addToPropertyMap(m_dx);
40    addToPropertyMap(m_dy);
41    addToPropertyMap(m_in1);
42}
43
44DEFINE_NODE_FACTORY(SVGFEOffsetElement)
45
46bool SVGFEOffsetElement::isSupportedAttribute(const QualifiedName& attrName)
47{
48    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
49    if (supportedAttributes.isEmpty()) {
50        supportedAttributes.add(SVGNames::inAttr);
51        supportedAttributes.add(SVGNames::dxAttr);
52        supportedAttributes.add(SVGNames::dyAttr);
53    }
54    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
55}
56
57void SVGFEOffsetElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
58{
59    if (!isSupportedAttribute(name)) {
60        SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
61        return;
62    }
63
64    SVGParsingError parseError = NoError;
65
66    if (name == SVGNames::inAttr)
67        m_in1->setBaseValueAsString(value, parseError);
68    else if (name == SVGNames::dxAttr)
69        m_dx->setBaseValueAsString(value, parseError);
70    else if (name == SVGNames::dyAttr)
71        m_dy->setBaseValueAsString(value, parseError);
72    else
73        ASSERT_NOT_REACHED();
74
75    reportAttributeParsingError(parseError, name, value);
76}
77
78void SVGFEOffsetElement::svgAttributeChanged(const QualifiedName& attrName)
79{
80    if (!isSupportedAttribute(attrName)) {
81        SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
82        return;
83    }
84
85    SVGElement::InvalidationGuard invalidationGuard(this);
86
87    if (attrName == SVGNames::inAttr || attrName == SVGNames::dxAttr || attrName == SVGNames::dyAttr) {
88        invalidate();
89        return;
90    }
91
92    ASSERT_NOT_REACHED();
93}
94
95PassRefPtr<FilterEffect> SVGFEOffsetElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
96{
97    FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
98
99    if (!input1)
100        return nullptr;
101
102    RefPtr<FilterEffect> effect = FEOffset::create(filter, m_dx->currentValue()->value(), m_dy->currentValue()->value());
103    effect->inputEffects().append(input1);
104    return effect.release();
105}
106
107}
108