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#if ENABLE(SVG) && ENABLE(FILTERS)
24#include "SVGFEOffsetElement.h"
25
26#include "Attribute.h"
27#include "FilterEffect.h"
28#include "SVGElementInstance.h"
29#include "SVGFilterBuilder.h"
30#include "SVGNames.h"
31
32namespace WebCore {
33
34// Animated property definitions
35DEFINE_ANIMATED_STRING(SVGFEOffsetElement, SVGNames::inAttr, In1, in1)
36DEFINE_ANIMATED_NUMBER(SVGFEOffsetElement, SVGNames::dxAttr, Dx, dx)
37DEFINE_ANIMATED_NUMBER(SVGFEOffsetElement, SVGNames::dyAttr, Dy, dy)
38
39BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGFEOffsetElement)
40    REGISTER_LOCAL_ANIMATED_PROPERTY(in1)
41    REGISTER_LOCAL_ANIMATED_PROPERTY(dx)
42    REGISTER_LOCAL_ANIMATED_PROPERTY(dy)
43    REGISTER_PARENT_ANIMATED_PROPERTIES(SVGFilterPrimitiveStandardAttributes)
44END_REGISTER_ANIMATED_PROPERTIES
45
46inline SVGFEOffsetElement::SVGFEOffsetElement(const QualifiedName& tagName, Document* document)
47    : SVGFilterPrimitiveStandardAttributes(tagName, document)
48{
49    ASSERT(hasTagName(SVGNames::feOffsetTag));
50    registerAnimatedPropertiesForSVGFEOffsetElement();
51}
52
53PassRefPtr<SVGFEOffsetElement> SVGFEOffsetElement::create(const QualifiedName& tagName, Document* document)
54{
55    return adoptRef(new SVGFEOffsetElement(tagName, document));
56}
57
58bool SVGFEOffsetElement::isSupportedAttribute(const QualifiedName& attrName)
59{
60    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
61    if (supportedAttributes.isEmpty()) {
62        supportedAttributes.add(SVGNames::inAttr);
63        supportedAttributes.add(SVGNames::dxAttr);
64        supportedAttributes.add(SVGNames::dyAttr);
65    }
66    return supportedAttributes.contains<QualifiedName, SVGAttributeHashTranslator>(attrName);
67}
68
69void SVGFEOffsetElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
70{
71    if (!isSupportedAttribute(name)) {
72        SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
73        return;
74    }
75
76    if (name == SVGNames::dxAttr) {
77        setDxBaseValue(value.toFloat());
78        return;
79    }
80
81    if (name == SVGNames::dyAttr) {
82        setDyBaseValue(value.toFloat());
83        return;
84    }
85
86    if (name == SVGNames::inAttr) {
87        setIn1BaseValue(value);
88        return;
89    }
90
91    ASSERT_NOT_REACHED();
92}
93
94void SVGFEOffsetElement::svgAttributeChanged(const QualifiedName& attrName)
95{
96    if (!isSupportedAttribute(attrName)) {
97        SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
98        return;
99    }
100
101    SVGElementInstance::InvalidationGuard invalidationGuard(this);
102
103    if (attrName == SVGNames::inAttr || attrName == SVGNames::dxAttr || attrName == SVGNames::dyAttr) {
104        invalidate();
105        return;
106    }
107
108    ASSERT_NOT_REACHED();
109}
110
111PassRefPtr<FilterEffect> SVGFEOffsetElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
112{
113    FilterEffect* input1 = filterBuilder->getEffectById(in1());
114
115    if (!input1)
116        return 0;
117
118    RefPtr<FilterEffect> effect = FEOffset::create(filter, dx(), dy());
119    effect->inputEffects().append(input1);
120    return effect.release();
121}
122
123}
124
125#endif // ENABLE(SVG)
126