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
|
/* -*- 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 "SVGAnimatedNumberList.h"
#include "DOMSVGAnimatedNumberList.h"
#include "mozilla/Move.h"
#include "nsSVGElement.h"
#include "nsSVGAttrTearoffTable.h"
#include "nsSMILValue.h"
#include "SVGNumberListSMILType.h"
namespace mozilla {
nsresult
SVGAnimatedNumberList::SetBaseValueString(const nsAString& aValue)
{
SVGNumberList newBaseValue;
nsresult rv = newBaseValue.SetValueFromString(aValue);
if (NS_FAILED(rv)) {
return rv;
}
DOMSVGAnimatedNumberList *domWrapper =
DOMSVGAnimatedNumberList::GetDOMWrapperIfExists(this);
if (domWrapper) {
// We must send this notification *before* changing mBaseVal! If the length
// of our baseVal is being reduced, 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 values *before* we change them.
//
domWrapper->InternalBaseValListWillChangeTo(newBaseValue);
}
// We don't need to call DidChange* here - we're only called by
// nsSVGElement::ParseAttribute under Element::SetAttr,
// which takes care of notifying.
mIsBaseSet = true;
rv = mBaseVal.CopyFrom(newBaseValue);
if (NS_FAILED(rv) && domWrapper) {
// Attempting to increase mBaseVal's length failed - reduce domWrapper
// back to the same length:
domWrapper->InternalBaseValListWillChangeTo(mBaseVal);
}
return rv;
}
void
SVGAnimatedNumberList::ClearBaseValue(uint32_t aAttrEnum)
{
DOMSVGAnimatedNumberList *domWrapper =
DOMSVGAnimatedNumberList::GetDOMWrapperIfExists(this);
if (domWrapper) {
// We must send this notification *before* changing mBaseVal! (See above.)
domWrapper->InternalBaseValListWillChangeTo(SVGNumberList());
}
mBaseVal.Clear();
mIsBaseSet = false;
// Caller notifies
}
nsresult
SVGAnimatedNumberList::SetAnimValue(const SVGNumberList& aNewAnimValue,
nsSVGElement *aElement,
uint32_t aAttrEnum)
{
DOMSVGAnimatedNumberList *domWrapper =
DOMSVGAnimatedNumberList::GetDOMWrapperIfExists(this);
if (domWrapper) {
// A new animation may totally change the number of items in the animVal
// list, replacing what was essentially a mirror of the baseVal list, or
// else replacing and overriding an existing animation. When this happens
// we must try and keep our animVal's DOM wrapper in sync (see the comment
// in DOMSVGAnimatedNumberList::InternalBaseValListWillChangeTo).
//
// It's 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. Happily it's cheap to just blindly
// notify our animVal's DOM wrapper of its internal counterpart's new value
// each time this method is called, so that's what we do.
//
// Note that we must send this notification *before* setting or changing
// mAnimVal! (See the comment in SetBaseValueString above.)
//
domWrapper->InternalAnimValListWillChangeTo(aNewAnimValue);
}
if (!mAnimVal) {
mAnimVal = new SVGNumberList();
}
nsresult rv = mAnimVal->CopyFrom(aNewAnimValue);
if (NS_FAILED(rv)) {
// OOM. We clear the animation, and, importantly, ClearAnimValue() ensures
// that mAnimVal and its DOM wrapper (if any) will have the same length!
ClearAnimValue(aElement, aAttrEnum);
return rv;
}
aElement->DidAnimateNumberList(aAttrEnum);
return NS_OK;
}
void
SVGAnimatedNumberList::ClearAnimValue(nsSVGElement *aElement,
uint32_t aAttrEnum)
{
DOMSVGAnimatedNumberList *domWrapper =
DOMSVGAnimatedNumberList::GetDOMWrapperIfExists(this);
if (domWrapper) {
// When all animation ends, animVal simply mirrors baseVal, which may have
// a different number of items to the last active animated value. We must
// keep the length of our animVal's DOM wrapper list in sync, and again we
// must do that before touching mAnimVal. See comments above.
//
domWrapper->InternalAnimValListWillChangeTo(mBaseVal);
}
mAnimVal = nullptr;
aElement->DidAnimateNumberList(aAttrEnum);
}
nsISMILAttr*
SVGAnimatedNumberList::ToSMILAttr(nsSVGElement *aSVGElement,
uint8_t aAttrEnum)
{
return new SMILAnimatedNumberList(this, aSVGElement, aAttrEnum);
}
nsresult
SVGAnimatedNumberList::
SMILAnimatedNumberList::ValueFromString(const nsAString& aStr,
const dom::SVGAnimationElement* /*aSrcElement*/,
nsSMILValue& aValue,
bool& aPreventCachingOfSandwich) const
{
nsSMILValue val(&SVGNumberListSMILType::sSingleton);
SVGNumberListAndInfo *nlai = static_cast<SVGNumberListAndInfo*>(val.mU.mPtr);
nsresult rv = nlai->SetValueFromString(aStr);
if (NS_SUCCEEDED(rv)) {
nlai->SetInfo(mElement);
aValue = Move(val);
}
aPreventCachingOfSandwich = false;
return rv;
}
nsSMILValue
SVGAnimatedNumberList::SMILAnimatedNumberList::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:
nsSMILValue val;
nsSMILValue tmp(&SVGNumberListSMILType::sSingleton);
SVGNumberListAndInfo *nlai = static_cast<SVGNumberListAndInfo*>(tmp.mU.mPtr);
nsresult rv = nlai->CopyFrom(mVal->mBaseVal);
if (NS_SUCCEEDED(rv)) {
nlai->SetInfo(mElement);
Swap(val, tmp);
}
return val;
}
nsresult
SVGAnimatedNumberList::SMILAnimatedNumberList::SetAnimValue(const nsSMILValue& aValue)
{
NS_ASSERTION(aValue.mType == &SVGNumberListSMILType::sSingleton,
"Unexpected type to assign animated value");
if (aValue.mType == &SVGNumberListSMILType::sSingleton) {
mVal->SetAnimValue(*static_cast<SVGNumberListAndInfo*>(aValue.mU.mPtr),
mElement,
mAttrEnum);
}
return NS_OK;
}
void
SVGAnimatedNumberList::SMILAnimatedNumberList::ClearAnimValue()
{
if (mVal->mAnimVal) {
mVal->ClearAnimValue(mElement, mAttrEnum);
}
}
} // namespace mozilla
|
