1/*
2 * Copyright (C) Research In Motion Limited 2011. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21
22#include "core/svg/SVGAnimatedColor.h"
23
24#include "core/rendering/RenderObject.h"
25#include "core/svg/ColorDistance.h"
26#include "core/svg/SVGAnimateElement.h"
27
28namespace blink {
29
30String SVGColorProperty::valueAsString() const
31{
32    return m_styleColor.isCurrentColor() ? "currentColor" : m_styleColor.color().serializedAsCSSComponentValue();
33}
34
35PassRefPtr<SVGPropertyBase> SVGColorProperty::cloneForAnimation(const String&) const
36{
37    // SVGAnimatedColor is deprecated. So No SVG DOM animation.
38    ASSERT_NOT_REACHED();
39    return nullptr;
40}
41
42static inline Color fallbackColorForCurrentColor(SVGElement* targetElement)
43{
44    ASSERT(targetElement);
45    if (RenderObject* targetRenderer = targetElement->renderer())
46        return targetRenderer->style()->visitedDependentColor(CSSPropertyColor);
47    else
48        return Color::transparent;
49}
50
51void SVGColorProperty::add(PassRefPtrWillBeRawPtr<SVGPropertyBase> other, SVGElement* contextElement)
52{
53    ASSERT(contextElement);
54
55    Color fallbackColor = fallbackColorForCurrentColor(contextElement);
56    Color fromColor = toSVGColorProperty(other)->m_styleColor.resolve(fallbackColor);
57    Color toColor = m_styleColor.resolve(fallbackColor);
58    m_styleColor = StyleColor(ColorDistance::addColors(fromColor, toColor));
59}
60
61void SVGColorProperty::calculateAnimatedValue(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, PassRefPtr<SVGPropertyBase> fromValue, PassRefPtr<SVGPropertyBase> toValue, PassRefPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement)
62{
63    StyleColor fromStyleColor = toSVGColorProperty(fromValue)->m_styleColor;
64    StyleColor toStyleColor = toSVGColorProperty(toValue)->m_styleColor;
65    StyleColor toAtEndOfDurationStyleColor = toSVGColorProperty(toAtEndOfDurationValue)->m_styleColor;
66
67    // Apply currentColor rules.
68    ASSERT(contextElement);
69    Color fallbackColor = fallbackColorForCurrentColor(contextElement);
70    Color fromColor = fromStyleColor.resolve(fallbackColor);
71    Color toColor = toStyleColor.resolve(fallbackColor);
72    Color toAtEndOfDurationColor = toAtEndOfDurationStyleColor.resolve(fallbackColor);
73    Color animatedColor = m_styleColor.resolve(fallbackColor);
74
75    ASSERT(animationElement);
76    float animatedRed = animatedColor.red();
77    animationElement->animateAdditiveNumber(percentage, repeatCount, fromColor.red(), toColor.red(), toAtEndOfDurationColor.red(), animatedRed);
78
79    float animatedGreen = animatedColor.green();
80    animationElement->animateAdditiveNumber(percentage, repeatCount, fromColor.green(), toColor.green(), toAtEndOfDurationColor.green(), animatedGreen);
81
82    float animatedBlue = animatedColor.blue();
83    animationElement->animateAdditiveNumber(percentage, repeatCount, fromColor.blue(), toColor.blue(), toAtEndOfDurationColor.blue(), animatedBlue);
84
85    float animatedAlpha = animatedColor.alpha();
86    animationElement->animateAdditiveNumber(percentage, repeatCount, fromColor.alpha(), toColor.alpha(), toAtEndOfDurationColor.alpha(), animatedAlpha);
87
88    m_styleColor = StyleColor(makeRGBA(roundf(animatedRed), roundf(animatedGreen), roundf(animatedBlue), roundf(animatedAlpha)));
89}
90
91float SVGColorProperty::calculateDistance(PassRefPtr<SVGPropertyBase> toValue, SVGElement* contextElement)
92{
93    ASSERT(contextElement);
94    Color fallbackColor = fallbackColorForCurrentColor(contextElement);
95
96    Color fromColor = m_styleColor.resolve(fallbackColor);
97    Color toColor = toSVGColorProperty(toValue)->m_styleColor.resolve(fallbackColor);
98    return ColorDistance::distance(fromColor, toColor);
99}
100
101}
102