summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/webkit/WebCore/svg/SVGAnimateTransformElement.cpp
blob: 3ebba06313cbb892faf890fc3abb870c7bd9db4e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
/*
    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
                  2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
    Copyright (C) 2007 Eric Seidel <eric@webkit.org>
    Copyright (C) 2008 Apple Inc. All Rights Reserved.

    This file is part of the WebKit project

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#include "config.h"

#if ENABLE(SVG) && ENABLE(SVG_ANIMATION)
#include "SVGAnimateTransformElement.h"

#include "MappedAttribute.h"
#include "RenderObject.h"
#include "SVGAngle.h"
#include "SVGElementInstance.h"
#include "SVGParserUtilities.h"
#include "SVGSVGElement.h"
#include "SVGStyledTransformableElement.h"
#include "SVGTextElement.h"
#include "SVGTransform.h"
#include "SVGTransformList.h"
#include "SVGUseElement.h"
#include "TransformationMatrix.h"
#include <math.h>
#include <wtf/MathExtras.h>

using namespace std;

namespace WebCore {

SVGAnimateTransformElement::SVGAnimateTransformElement(const QualifiedName& tagName, Document* doc)
    : SVGAnimationElement(tagName, doc)
    , m_type(SVGTransform::SVG_TRANSFORM_UNKNOWN)
    , m_baseIndexInTransformList(0)
{
}

SVGAnimateTransformElement::~SVGAnimateTransformElement()
{
}

bool SVGAnimateTransformElement::hasValidTarget() const
{
    SVGElement* targetElement = this->targetElement();
    return SVGAnimationElement::hasValidTarget() && (targetElement->isStyledTransformable() || targetElement->hasTagName(SVGNames::textTag));
}

void SVGAnimateTransformElement::parseMappedAttribute(MappedAttribute* attr)
{
    if (attr->name() == SVGNames::typeAttr) {
        if (attr->value() == "translate")
            m_type = SVGTransform::SVG_TRANSFORM_TRANSLATE;
        else if (attr->value() == "scale")
            m_type = SVGTransform::SVG_TRANSFORM_SCALE;
        else if (attr->value() == "rotate")
            m_type = SVGTransform::SVG_TRANSFORM_ROTATE;
        else if (attr->value() == "skewX")
            m_type = SVGTransform::SVG_TRANSFORM_SKEWX;
        else if (attr->value() == "skewY")
            m_type = SVGTransform::SVG_TRANSFORM_SKEWY;
    } else
        SVGAnimationElement::parseMappedAttribute(attr);
}

    
static PassRefPtr<SVGTransformList> transformListFor(SVGElement* element)
{
    ASSERT(element);
    if (element->isStyledTransformable())
        return static_cast<SVGStyledTransformableElement*>(element)->transform();
    if (element->hasTagName(SVGNames::textTag))
        return static_cast<SVGTextElement*>(element)->transform();
    return 0;
}
    
void SVGAnimateTransformElement::resetToBaseValue(const String& baseValue)
{
    if (!hasValidTarget())
        return;
    if (baseValue.isEmpty()) {
        ExceptionCode ec;
        RefPtr<SVGTransformList> list = transformListFor(targetElement());
        list->clear(ec);
    } else
        targetElement()->setAttribute(SVGNames::transformAttr, baseValue);
}

void SVGAnimateTransformElement::calculateAnimatedValue(float percentage, unsigned repeat, SVGSMILElement* resultElement)
{
    if (!hasValidTarget())
        return;
    SVGElement* targetElement = resultElement->targetElement();
    RefPtr<SVGTransformList> transformList = transformListFor(targetElement);
    ASSERT(transformList);

    ExceptionCode ec;
    if (!isAdditive())
        transformList->clear(ec);
    if (isAccumulated() && repeat) {
        SVGTransform accumulatedTransform = SVGTransformDistance(m_fromTransform, m_toTransform).scaledDistance(repeat).addToSVGTransform(SVGTransform());
        transformList->appendItem(accumulatedTransform, ec);
    }
    SVGTransform transform = SVGTransformDistance(m_fromTransform, m_toTransform).scaledDistance(percentage).addToSVGTransform(m_fromTransform);
    transformList->appendItem(transform, ec);
}
    
bool SVGAnimateTransformElement::calculateFromAndToValues(const String& fromString, const String& toString)
{
    m_fromTransform = parseTransformValue(fromString);
    if (!m_fromTransform.isValid())
        return false;
    m_toTransform = parseTransformValue(toString);
    return m_toTransform.isValid();
}

bool SVGAnimateTransformElement::calculateFromAndByValues(const String& fromString, const String& byString)
{

    m_fromTransform = parseTransformValue(fromString);
    if (!m_fromTransform.isValid())
        return false;
    m_toTransform = SVGTransformDistance::addSVGTransforms(m_fromTransform, parseTransformValue(byString));
    return m_toTransform.isValid();
}

SVGTransform SVGAnimateTransformElement::parseTransformValue(const String& value) const
{
    if (value.isEmpty())
        return SVGTransform(m_type);
    SVGTransform result;
    // FIXME: This is pretty dumb but parseTransformValue() wants those parenthesis.
    String parseString("(" + value + ")");
    const UChar* ptr = parseString.characters();
    SVGTransformable::parseTransformValue(m_type, ptr, ptr + parseString.length(), result); // ignoring return value
    return result;
}
    
void SVGAnimateTransformElement::applyResultsToTarget()
{
    if (!hasValidTarget())
        return;
    // We accumulate to the target element transform list so there is not much to do here.
    SVGElement* targetElement = this->targetElement();
    if (targetElement->renderer())
        targetElement->renderer()->setNeedsLayout(true);
    
    // ...except in case where we have additional instances in <use> trees.
    HashSet<SVGElementInstance*> instances = targetElement->instancesForElement();
    RefPtr<SVGTransformList> transformList = transformListFor(targetElement);
    HashSet<SVGElementInstance*>::iterator end = instances.end();
    for (HashSet<SVGElementInstance*>::iterator it = instances.begin(); it != end; ++it) {
        SVGElement* shadowTreeElement = (*it)->shadowTreeElement();
        ASSERT(shadowTreeElement);
        if (shadowTreeElement->isStyledTransformable())
            static_cast<SVGStyledTransformableElement*>(shadowTreeElement)->setTransform(transformList.get());
        else if (shadowTreeElement->hasTagName(SVGNames::textTag))
            static_cast<SVGTextElement*>(shadowTreeElement)->setTransform(transformList.get());
        if (shadowTreeElement->renderer())
            shadowTreeElement->renderer()->setNeedsLayout(true);
    }
}
    
float SVGAnimateTransformElement::calculateDistance(const String& fromString, const String& toString)
{
    // FIXME: This is not correct in all cases. The spec demands that each component (translate x and y for example) 
    // is paced separately. To implement this we need to treat each component as individual animation everywhere.
    SVGTransform from = parseTransformValue(fromString);
    if (!from.isValid())
        return -1.f;
    SVGTransform to = parseTransformValue(toString);
    if (!to.isValid() || from.type() != to.type())
        return -1.f;
    if (to.type() == SVGTransform::SVG_TRANSFORM_TRANSLATE) {
        FloatSize diff = to.translate() - from.translate();
        return sqrtf(diff.width() * diff.width() + diff.height() * diff.height());
    }
    if (to.type() == SVGTransform::SVG_TRANSFORM_ROTATE)
        return fabsf(to.angle() - from.angle());
    if (to.type() == SVGTransform::SVG_TRANSFORM_SCALE) {
        FloatSize diff = to.scale() - from.scale();
        return sqrtf(diff.width() * diff.width() + diff.height() * diff.height());
    }
    return -1.f;
}

}

// vim:ts=4:noet
#endif // ENABLE(SVG)