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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "SVGAnimatedPathSegList.h"
#include <utility>
#include "DOMSVGPathSegList.h"
#include "SVGPathSegListSMILType.h"
#include "mozilla/SMILValue.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/dom/SVGElement.h"
using namespace mozilla::dom;
// See the comments in this file's header!
namespace mozilla {
nsresult SVGAnimatedPathSegList::SetBaseValueString(const nsAString& aValue) {
SVGPathData newBaseValue;
// The spec says that the path data is parsed and accepted up to the first
// error encountered, so we don't return early if an error occurs. However,
// we do want to throw any error code from setAttribute if there's a problem.
nsresult rv = newBaseValue.SetValueFromString(aValue);
// We must send these notifications *before* changing mBaseVal! Our baseVal's
// DOM wrapper list may have to remove DOM items from itself, and any removed
// DOM items need to copy their internal counterpart's values *before* we
// change them. See the comments in
// DOMSVGPathSegList::InternalListWillChangeTo().
DOMSVGPathSegList* baseValWrapper = nullptr;
DOMSVGPathSegList* animValWrapper = nullptr;
if (StaticPrefs::dom_svg_pathSeg_enabled()) {
baseValWrapper = DOMSVGPathSegList::GetDOMWrapperIfExists(GetBaseValKey());
if (baseValWrapper) {
baseValWrapper->InternalListWillChangeTo(newBaseValue);
}
if (!IsAnimating()) { // DOM anim val wraps our base val too!
animValWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (animValWrapper) {
animValWrapper->InternalListWillChangeTo(newBaseValue);
}
}
}
// Only now may we modify mBaseVal!
// We don't need to call DidChange* here - we're only called by
// SVGElement::ParseAttribute under Element::SetAttr,
// which takes care of notifying.
mBaseVal.SwapWith(newBaseValue);
return rv;
}
void SVGAnimatedPathSegList::ClearBaseValue() {
if (StaticPrefs::dom_svg_pathSeg_enabled()) {
// We must send these notifications *before* changing mBaseVal! (See above.)
DOMSVGPathSegList* baseValWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetBaseValKey());
if (baseValWrapper) {
baseValWrapper->InternalListWillChangeTo(SVGPathData());
}
if (!IsAnimating()) { // DOM anim val wraps our base val too!
DOMSVGPathSegList* animValWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (animValWrapper) {
animValWrapper->InternalListWillChangeTo(SVGPathData());
}
}
}
mBaseVal.Clear();
// Caller notifies
}
nsresult SVGAnimatedPathSegList::SetAnimValue(const SVGPathData& aNewAnimValue,
SVGElement* aElement) {
// Note that a new animation may totally change the number of items in the
// animVal list, either replacing what was essentially a mirror of the
// baseVal list, or else replacing and overriding an existing animation.
// Unfortunately it is not possible for us to reliably distinguish between
// calls to this method that are setting a new sample for an existing
// animation, and calls that are setting the first sample of an animation
// that will override an existing animation. In the case of DOMSVGPathSegList
// the InternalListWillChangeTo method is not virtually free as it is for the
// other DOM list classes, so this is a shame. We'd quite like to be able to
// skip the call if possible.
if (StaticPrefs::dom_svg_pathSeg_enabled()) {
// We must send these notifications *before* changing mAnimVal! (See above.)
DOMSVGPathSegList* domWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (domWrapper) {
domWrapper->InternalListWillChangeTo(aNewAnimValue);
}
}
if (!mAnimVal) {
mAnimVal = MakeUnique<SVGPathData>();
}
nsresult rv = mAnimVal->CopyFrom(aNewAnimValue);
if (NS_FAILED(rv)) {
// OOM. We clear the animation and, importantly, ClearAnimValue() ensures
// that mAnimVal's DOM wrapper (if any) is kept in sync!
ClearAnimValue(aElement);
}
aElement->DidAnimatePathSegList();
return rv;
}
void SVGAnimatedPathSegList::ClearAnimValue(SVGElement* aElement) {
if (StaticPrefs::dom_svg_pathSeg_enabled()) {
// We must send these notifications *before* changing mAnimVal! (See above.)
DOMSVGPathSegList* domWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (domWrapper) {
// When all animation ends, animVal simply mirrors baseVal, which may have
// a different number of items to the last active animated value.
//
domWrapper->InternalListWillChangeTo(mBaseVal);
}
}
mAnimVal = nullptr;
aElement->DidAnimatePathSegList();
}
bool SVGAnimatedPathSegList::IsRendered() const {
return mAnimVal ? !mAnimVal->IsEmpty() : !mBaseVal.IsEmpty();
}
UniquePtr<SMILAttr> SVGAnimatedPathSegList::ToSMILAttr(SVGElement* aElement) {
return MakeUnique<SMILAnimatedPathSegList>(this, aElement);
}
nsresult SVGAnimatedPathSegList::SMILAnimatedPathSegList::ValueFromString(
const nsAString& aStr, const dom::SVGAnimationElement* /*aSrcElement*/,
SMILValue& aValue, bool& aPreventCachingOfSandwich) const {
SMILValue val(SVGPathSegListSMILType::Singleton());
SVGPathDataAndInfo* list = static_cast<SVGPathDataAndInfo*>(val.mU.mPtr);
nsresult rv = list->SetValueFromString(aStr);
if (NS_SUCCEEDED(rv)) {
list->SetElement(mElement);
aValue = std::move(val);
}
return rv;
}
SMILValue SVGAnimatedPathSegList::SMILAnimatedPathSegList::GetBaseValue()
const {
// To benefit from Return Value Optimization and avoid copy constructor calls
// due to our use of return-by-value, we must return the exact same object
// from ALL return points. This function must only return THIS variable:
SMILValue val;
SMILValue tmp(SVGPathSegListSMILType::Singleton());
auto* list = static_cast<SVGPathDataAndInfo*>(tmp.mU.mPtr);
nsresult rv = list->CopyFrom(mVal->mBaseVal);
if (NS_SUCCEEDED(rv)) {
list->SetElement(mElement);
val = std::move(tmp);
}
return val;
}
nsresult SVGAnimatedPathSegList::SMILAnimatedPathSegList::SetAnimValue(
const SMILValue& aValue) {
NS_ASSERTION(aValue.mType == SVGPathSegListSMILType::Singleton(),
"Unexpected type to assign animated value");
if (aValue.mType == SVGPathSegListSMILType::Singleton()) {
mVal->SetAnimValue(*static_cast<SVGPathDataAndInfo*>(aValue.mU.mPtr),
mElement);
}
return NS_OK;
}
void SVGAnimatedPathSegList::SMILAnimatedPathSegList::ClearAnimValue() {
if (mVal->mAnimVal) {
mVal->ClearAnimValue(mElement);
}
}
size_t SVGAnimatedPathSegList::SizeOfExcludingThis(
MallocSizeOf aMallocSizeOf) const {
size_t total = mBaseVal.SizeOfExcludingThis(aMallocSizeOf);
if (mAnimVal) {
mAnimVal->SizeOfIncludingThis(aMallocSizeOf);
}
return total;
}
} // namespace mozilla
|
