1 /*
2 * Copyright (C) 2014 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef SVGPathSegList_h
32 #define SVGPathSegList_h
33
34 #include "core/svg/SVGPathByteStream.h"
35 #include "core/svg/SVGPathSeg.h"
36 #include "core/svg/properties/SVGAnimatedProperty.h"
37 #include "core/svg/properties/SVGListPropertyHelper.h"
38 #include "wtf/WeakPtr.h"
39
40 namespace WebCore {
41
42 class SVGPathElement;
43 class SVGPathSegListTearOff;
44
45 class SVGPathSegList : public SVGListPropertyHelper<SVGPathSegList, SVGPathSeg> {
46 public:
47 typedef void PrimitiveType;
48 typedef SVGPathSeg ItemPropertyType;
49 typedef SVGPathSegListTearOff TearOffType;
50 typedef SVGListPropertyHelper<SVGPathSegList, SVGPathSeg> Base;
51
52 static PassRefPtr<SVGPathSegList> create(SVGPathElement* contextElement, SVGPathSegRole role = PathSegUndefinedRole)
53 {
54 return adoptRef(new SVGPathSegList(contextElement, role));
55 }
56
57 virtual ~SVGPathSegList();
58
59 const SVGPathByteStream* byteStream() const;
clearByteStream()60 void clearByteStream() { m_byteStream.clear(); }
61
62 // SVGListPropertyHelper methods with |m_byteStream| sync:
63
at(size_t index)64 ItemPropertyType* at(size_t index)
65 {
66 updateListFromByteStream();
67 return Base::at(index);
68 }
69
length()70 size_t length()
71 {
72 updateListFromByteStream();
73 return Base::length();
74 }
75
isEmpty()76 bool isEmpty() const
77 {
78 if (m_listSyncedToByteStream)
79 return Base::isEmpty();
80
81 return !m_byteStream || m_byteStream->isEmpty();
82 }
83
clear()84 void clear()
85 {
86 clearByteStream();
87 Base::clear();
88 }
89
append(PassRefPtr<ItemPropertyType> passNewItem)90 void append(PassRefPtr<ItemPropertyType> passNewItem)
91 {
92 updateListFromByteStream();
93 clearByteStream();
94 Base::append(passNewItem);
95 }
96
initialize(PassRefPtr<ItemPropertyType> passItem)97 PassRefPtr<ItemPropertyType> initialize(PassRefPtr<ItemPropertyType> passItem)
98 {
99 clearByteStream();
100 return Base::initialize(passItem);
101 }
102
getItem(size_t index,ExceptionState & exceptionState)103 PassRefPtr<ItemPropertyType> getItem(size_t index, ExceptionState& exceptionState)
104 {
105 updateListFromByteStream();
106 return Base::getItem(index, exceptionState);
107 }
108
insertItemBefore(PassRefPtr<ItemPropertyType> passItem,size_t index)109 PassRefPtr<ItemPropertyType> insertItemBefore(PassRefPtr<ItemPropertyType> passItem, size_t index)
110 {
111 updateListFromByteStream();
112 clearByteStream();
113 return Base::insertItemBefore(passItem, index);
114 }
115
replaceItem(PassRefPtr<ItemPropertyType> passItem,size_t index,ExceptionState & exceptionState)116 PassRefPtr<ItemPropertyType> replaceItem(PassRefPtr<ItemPropertyType> passItem, size_t index, ExceptionState& exceptionState)
117 {
118 updateListFromByteStream();
119 clearByteStream();
120 return Base::replaceItem(passItem, index, exceptionState);
121 }
122
removeItem(size_t index,ExceptionState & exceptionState)123 PassRefPtr<ItemPropertyType> removeItem(size_t index, ExceptionState& exceptionState)
124 {
125 updateListFromByteStream();
126 clearByteStream();
127 return Base::removeItem(index, exceptionState);
128 }
129
130 PassRefPtr<ItemPropertyType> appendItem(PassRefPtr<ItemPropertyType> passItem);
131
132 // SVGPropertyBase:
133 PassRefPtr<SVGPathSegList> clone();
134 virtual PassRefPtr<SVGPropertyBase> cloneForAnimation(const String&) const OVERRIDE;
135 virtual String valueAsString() const OVERRIDE;
136 void setValueAsString(const String&, ExceptionState&);
137
138 virtual void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) OVERRIDE;
139 virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtr<SVGPropertyBase> fromValue, PassRefPtr<SVGPropertyBase> toValue, PassRefPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement*) OVERRIDE;
140 virtual float calculateDistance(PassRefPtr<SVGPropertyBase> to, SVGElement*) OVERRIDE;
141
classType()142 static AnimatedPropertyType classType() { return AnimatedPath; }
143
144 private:
145 SVGPathSegList(SVGPathElement*, SVGPathSegRole);
146 SVGPathSegList(SVGPathElement*, SVGPathSegRole, PassOwnPtr<SVGPathByteStream>);
147
148 friend class SVGPathSegListBuilder;
149 // This is only to be called from SVGPathSegListBuilder.
appendWithoutByteStreamSync(PassRefPtr<ItemPropertyType> passNewItem)150 void appendWithoutByteStreamSync(PassRefPtr<ItemPropertyType> passNewItem)
151 {
152 Base::append(passNewItem);
153 }
154
155 void updateListFromByteStream();
156 void invalidateList();
157
158 // FIXME: This pointer should be removed after SVGPathSeg has a tear-off.
159 // FIXME: oilpan: This is raw-ptr to avoid reference cycles.
160 // SVGPathSegList is either owned by SVGAnimatedPath or
161 // SVGPathSegListTearOff. Both keep |contextElement| alive,
162 // so this ptr is always valid.
163 SVGPathElement* m_contextElement;
164
165 SVGPathSegRole m_role;
166 mutable OwnPtr<SVGPathByteStream> m_byteStream;
167 bool m_listSyncedToByteStream;
168 };
169
toSVGPathSegList(PassRefPtr<SVGPropertyBase> passBase)170 inline PassRefPtr<SVGPathSegList> toSVGPathSegList(PassRefPtr<SVGPropertyBase> passBase)
171 {
172 RefPtr<SVGPropertyBase> base = passBase;
173 ASSERT(base->type() == SVGPathSegList::classType());
174 return static_pointer_cast<SVGPathSegList>(base.release());
175 }
176
177 } // namespace WebCore
178
179 #endif
180