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
|
/* -*- 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 "mozilla/dom/SVGTests.h"
#include "DOMSVGStringList.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "mozilla/dom/SVGSwitchElement.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsStyleUtil.h"
#include "mozilla/Preferences.h"
namespace mozilla::dom {
nsStaticAtom* const SVGTests::sStringListNames[2] = {
nsGkAtoms::requiredExtensions,
nsGkAtoms::systemLanguage,
};
SVGTests::SVGTests() {
mStringListAttributes[LANGUAGE].SetIsCommaSeparated(true);
}
already_AddRefed<DOMSVGStringList> SVGTests::RequiredExtensions() {
return DOMSVGStringList::GetDOMWrapper(&mStringListAttributes[EXTENSIONS],
AsSVGElement(), true, EXTENSIONS);
}
already_AddRefed<DOMSVGStringList> SVGTests::SystemLanguage() {
return DOMSVGStringList::GetDOMWrapper(&mStringListAttributes[LANGUAGE],
AsSVGElement(), true, LANGUAGE);
}
bool SVGTests::HasExtension(const nsAString& aExtension) const {
#define SVG_SUPPORTED_EXTENSION(str) \
if (aExtension.EqualsLiteral(str)) return true;
SVG_SUPPORTED_EXTENSION("http://www.w3.org/1999/xhtml")
nsNameSpaceManager* nameSpaceManager = nsNameSpaceManager::GetInstance();
if (AsSVGElement()->IsInChromeDocument() ||
!nameSpaceManager->mMathMLDisabled) {
SVG_SUPPORTED_EXTENSION("http://www.w3.org/1998/Math/MathML")
}
#undef SVG_SUPPORTED_EXTENSION
return false;
}
bool SVGTests::IsConditionalProcessingAttribute(
const nsAtom* aAttribute) const {
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == sStringListNames[i]) {
return true;
}
}
return false;
}
int32_t SVGTests::GetBestLanguagePreferenceRank(
const nsAString& aAcceptLangs) const {
if (!mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
return -2;
}
int32_t lowestRank = -1;
for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
int32_t index = 0;
for (const nsAString& languageToken :
nsCharSeparatedTokenizer(aAcceptLangs, ',').ToRange()) {
bool exactMatch = languageToken.Equals(mStringListAttributes[LANGUAGE][i],
nsCaseInsensitiveStringComparator);
bool prefixOnlyMatch =
!exactMatch && nsStyleUtil::DashMatchCompare(
mStringListAttributes[LANGUAGE][i], languageToken,
nsCaseInsensitiveStringComparator);
if (index == 0 && exactMatch) {
// best possible match
return 0;
}
if ((exactMatch || prefixOnlyMatch) &&
(lowestRank == -1 || 2 * index + prefixOnlyMatch < lowestRank)) {
lowestRank = 2 * index + prefixOnlyMatch;
}
++index;
}
}
return lowestRank;
}
bool SVGTests::PassesConditionalProcessingTestsIgnoringSystemLanguage() const {
// Required Extensions
//
// The requiredExtensions attribute defines a list of required language
// extensions. Language extensions are capabilities within a user agent that
// go beyond the feature set defined in the SVG specification.
// Each extension is identified by a URI reference.
// For now, claim that mozilla's SVG implementation supports XHTML and MathML.
if (mStringListAttributes[EXTENSIONS].IsExplicitlySet()) {
if (mStringListAttributes[EXTENSIONS].IsEmpty()) {
return false;
}
for (uint32_t i = 0; i < mStringListAttributes[EXTENSIONS].Length(); i++) {
if (!HasExtension(mStringListAttributes[EXTENSIONS][i])) {
return false;
}
}
}
return true;
}
bool SVGTests::PassesConditionalProcessingTests() const {
if (!PassesConditionalProcessingTestsIgnoringSystemLanguage()) {
return false;
}
// systemLanguage
//
// Evaluates to "true" if one of the languages indicated by user preferences
// exactly equals one of the languages given in the value of this parameter,
// or if one of the languages indicated by user preferences exactly equals a
// prefix of one of the languages given in the value of this parameter such
// that the first tag character following the prefix is "-".
if (mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
if (mStringListAttributes[LANGUAGE].IsEmpty()) {
return false;
}
// Get our language preferences
nsAutoString acceptLangs;
Preferences::GetLocalizedString("intl.accept_languages", acceptLangs);
if (acceptLangs.IsEmpty()) {
NS_WARNING(
"no default language specified for systemLanguage conditional test");
return false;
}
for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
nsCharSeparatedTokenizer languageTokenizer(acceptLangs, ',');
while (languageTokenizer.hasMoreTokens()) {
if (nsStyleUtil::DashMatchCompare(mStringListAttributes[LANGUAGE][i],
languageTokenizer.nextToken(),
nsCaseInsensitiveStringComparator)) {
return true;
}
}
}
return false;
}
return true;
}
bool SVGTests::ParseConditionalProcessingAttribute(nsAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult) {
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == sStringListNames[i]) {
nsresult rv = mStringListAttributes[i].SetValue(aValue);
if (NS_FAILED(rv)) {
mStringListAttributes[i].Clear();
}
MaybeInvalidate();
return true;
}
}
return false;
}
void SVGTests::UnsetAttr(const nsAtom* aAttribute) {
for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
if (aAttribute == sStringListNames[i]) {
mStringListAttributes[i].Clear();
MaybeInvalidate();
return;
}
}
}
nsStaticAtom* SVGTests::GetAttrName(uint8_t aAttrEnum) const {
return sStringListNames[aAttrEnum];
}
void SVGTests::GetAttrValue(uint8_t aAttrEnum, nsAttrValue& aValue) const {
MOZ_ASSERT(aAttrEnum < ArrayLength(sStringListNames),
"aAttrEnum out of range");
aValue.SetTo(mStringListAttributes[aAttrEnum], nullptr);
}
void SVGTests::MaybeInvalidate() {
nsIContent* parent = AsSVGElement()->GetFlattenedTreeParent();
if (auto* svgSwitch = SVGSwitchElement::FromNodeOrNull(parent)) {
svgSwitch->MaybeInvalidate();
}
}
} // namespace mozilla::dom
|
