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
|
/*
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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.
*/
#ifndef SVGPropertyTearOff_h
#define SVGPropertyTearOff_h
#if ENABLE(SVG)
#include "SVGAnimatedProperty.h"
#include "SVGElement.h"
#include "SVGProperty.h"
namespace WebCore {
template<typename PropertyType>
class SVGPropertyTearOff : public SVGProperty {
public:
typedef SVGPropertyTearOff<PropertyType> Self;
// Used for child types (baseVal/animVal) of a SVGAnimated* property (for example: SVGAnimatedLength::baseVal()).
// Also used for list tear offs (for example: text.x.baseVal.getItem(0)).
static PassRefPtr<Self> create(SVGAnimatedProperty* animatedProperty, SVGPropertyRole role, PropertyType& value)
{
ASSERT(animatedProperty);
return adoptRef(new Self(animatedProperty, role, value));
}
// Used for non-animated POD types (for example: SVGSVGElement::createSVGLength()).
static PassRefPtr<Self> create(const PropertyType& initialValue)
{
return adoptRef(new Self(initialValue));
}
PropertyType& propertyReference() { return *m_value; }
SVGAnimatedProperty* animatedProperty() const { return m_animatedProperty.get(); }
// Used only by the list tear offs!
void setValue(PropertyType& value)
{
if (m_valueIsCopy)
delete m_value;
m_valueIsCopy = false;
m_value = &value;
}
void setAnimatedProperty(SVGAnimatedProperty* animatedProperty) { m_animatedProperty = animatedProperty; }
SVGElement* contextElement() const
{
if (!m_animatedProperty || m_valueIsCopy)
return 0;
return m_animatedProperty->contextElement();
}
void detachWrapper()
{
if (m_valueIsCopy)
return;
// Switch from a live value, to a non-live value.
// For example: <text x="50"/>
// var item = text.x.baseVal.getItem(0);
// text.setAttribute("x", "100");
// item.value still has to report '50' and it has to be possible to modify 'item'
// w/o changing the "new item" (with x=100) in the text element.
// Whenever the XML DOM modifies the "x" attribute, all existing wrappers are detached, using this function.
m_value = new PropertyType(*m_value);
m_valueIsCopy = true;
m_animatedProperty = 0;
}
virtual void commitChange()
{
if (!m_animatedProperty || m_valueIsCopy)
return;
m_animatedProperty->commitChange();
}
virtual SVGPropertyRole role() const { return m_role; }
protected:
SVGPropertyTearOff(SVGAnimatedProperty* animatedProperty, SVGPropertyRole role, PropertyType& value)
: m_animatedProperty(animatedProperty)
, m_role(role)
, m_value(&value)
, m_valueIsCopy(false)
{
// Using operator & is completly fine, as SVGAnimatedProperty owns this reference,
// and we're guaranteed to live as long as SVGAnimatedProperty does.
}
SVGPropertyTearOff(const PropertyType& initialValue)
: m_animatedProperty(0)
, m_role(UndefinedRole)
, m_value(new PropertyType(initialValue))
, m_valueIsCopy(true)
{
}
virtual ~SVGPropertyTearOff()
{
if (m_valueIsCopy)
delete m_value;
}
RefPtr<SVGAnimatedProperty> m_animatedProperty;
SVGPropertyRole m_role;
PropertyType* m_value;
bool m_valueIsCopy : 1;
};
}
#endif // ENABLE(SVG)
#endif // SVGPropertyTearOff_h
|
