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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/* -*- 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/SVGMPathElement.h"
#include "nsDebug.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/dom/ReferrerInfo.h"
#include "mozilla/dom/SVGAnimateMotionElement.h"
#include "mozilla/dom/SVGGeometryElement.h"
#include "nsContentUtils.h"
#include "nsIReferrerInfo.h"
#include "mozilla/dom/SVGMPathElementBinding.h"
#include "nsIURI.h"
NS_IMPL_NS_NEW_SVG_ELEMENT(MPath)
namespace mozilla::dom {
JSObject* SVGMPathElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGMPathElement_Binding::Wrap(aCx, this, aGivenProto);
}
SVGElement::StringInfo SVGMPathElement::sStringInfo[2] = {
{nsGkAtoms::href, kNameSpaceID_None, false},
{nsGkAtoms::href, kNameSpaceID_XLink, false}};
// Cycle collection magic -- based on SVGUseElement
NS_IMPL_CYCLE_COLLECTION_CLASS(SVGMPathElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGMPathElement,
SVGMPathElementBase)
tmp->UnlinkHrefTarget(false);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGMPathElement,
SVGMPathElementBase)
tmp->mPathTracker.Traverse(&cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
//----------------------------------------------------------------------
// nsISupports methods
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(SVGMPathElement,
SVGMPathElementBase,
nsIMutationObserver)
// Constructor
SVGMPathElement::SVGMPathElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: SVGMPathElementBase(std::move(aNodeInfo)), mPathTracker(this) {}
SVGMPathElement::~SVGMPathElement() { UnlinkHrefTarget(false); }
//----------------------------------------------------------------------
// nsINode methods
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGMPathElement)
already_AddRefed<DOMSVGAnimatedString> SVGMPathElement::Href() {
return mStringAttributes[HREF].IsExplicitlySet()
? mStringAttributes[HREF].ToDOMAnimatedString(this)
: mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);
}
//----------------------------------------------------------------------
// nsIContent methods
nsresult SVGMPathElement::BindToTree(BindContext& aContext, nsINode& aParent) {
MOZ_ASSERT(!mPathTracker.get(),
"Shouldn't have href-target yet (or it should've been cleared)");
nsresult rv = SVGMPathElementBase::BindToTree(aContext, aParent);
NS_ENSURE_SUCCESS(rv, rv);
if (IsInComposedDoc()) {
const nsAttrValue* hrefAttrValue =
HasAttr(kNameSpaceID_None, nsGkAtoms::href)
? mAttrs.GetAttr(nsGkAtoms::href, kNameSpaceID_None)
: mAttrs.GetAttr(nsGkAtoms::href, kNameSpaceID_XLink);
if (hrefAttrValue) {
UpdateHrefTarget(nsIContent::FromNode(aParent),
hrefAttrValue->GetStringValue());
}
}
return NS_OK;
}
void SVGMPathElement::UnbindFromTree(bool aNullParent) {
UnlinkHrefTarget(true);
SVGMPathElementBase::UnbindFromTree(aNullParent);
}
bool SVGMPathElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) {
bool returnVal = SVGMPathElementBase::ParseAttribute(
aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult);
if ((aNamespaceID == kNameSpaceID_XLink ||
aNamespaceID == kNameSpaceID_None) &&
aAttribute == nsGkAtoms::href && IsInComposedDoc()) {
// Note: If we fail the IsInDoc call, it's ok -- we'll update the target
// on next BindToTree call.
// Note: "href" takes priority over xlink:href. So if "xlink:href" is being
// set here, we only let that update our target if "href" is *unset*.
if (aNamespaceID != kNameSpaceID_XLink ||
!mStringAttributes[HREF].IsExplicitlySet()) {
UpdateHrefTarget(GetParent(), aValue);
}
}
return returnVal;
}
nsresult SVGMPathElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) {
if (!aValue && aName == nsGkAtoms::href) {
// href attr being removed.
if (aNamespaceID == kNameSpaceID_None) {
UnlinkHrefTarget(true);
// After unsetting href, we may still have xlink:href, so we should
// try to add it back.
const nsAttrValue* xlinkHref =
mAttrs.GetAttr(nsGkAtoms::href, kNameSpaceID_XLink);
if (xlinkHref) {
UpdateHrefTarget(GetParent(), xlinkHref->GetStringValue());
}
} else if (aNamespaceID == kNameSpaceID_XLink &&
!HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
UnlinkHrefTarget(true);
} // else: we unset some random-namespace href attribute, or unset
// xlink:href but still have href attribute, so keep the target linking
// to href.
}
return SVGMPathElementBase::AfterSetAttr(
aNamespaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
}
//----------------------------------------------------------------------
// SVGElement methods
SVGElement::StringAttributesInfo SVGMPathElement::GetStringInfo() {
return StringAttributesInfo(mStringAttributes, sStringInfo,
ArrayLength(sStringInfo));
}
//----------------------------------------------------------------------
// nsIMutationObserver methods
void SVGMPathElement::AttributeChanged(Element* aElement, int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType,
const nsAttrValue* aOldValue) {
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::d) {
NotifyParentOfMpathChange(GetParent());
}
}
}
//----------------------------------------------------------------------
// Public helper methods
SVGGeometryElement* SVGMPathElement::GetReferencedPath() {
if (!HasAttr(kNameSpaceID_XLink, nsGkAtoms::href) &&
!HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
MOZ_ASSERT(!mPathTracker.get(),
"We shouldn't have a href target "
"if we don't have an xlink:href or href attribute");
return nullptr;
}
nsIContent* genericTarget = mPathTracker.get();
if (genericTarget && genericTarget->IsNodeOfType(nsINode::eSHAPE)) {
return static_cast<SVGGeometryElement*>(genericTarget);
}
return nullptr;
}
//----------------------------------------------------------------------
// Protected helper methods
void SVGMPathElement::UpdateHrefTarget(nsIContent* aParent,
const nsAString& aHrefStr) {
nsCOMPtr<nsIURI> baseURI = GetBaseURI();
if (nsContentUtils::IsLocalRefURL(aHrefStr)) {
baseURI = SVGObserverUtils::GetBaseURLForLocalRef(this, baseURI);
}
nsCOMPtr<nsIURI> targetURI;
nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), aHrefStr,
OwnerDoc(), baseURI);
// Stop observing old target (if any)
if (mPathTracker.get()) {
mPathTracker.get()->RemoveMutationObserver(this);
}
if (aParent) {
// Pass in |aParent| instead of |this| -- first argument is only used
// for a call to GetComposedDoc(), and |this| might not have a current
// document yet (if our caller is BindToTree).
nsCOMPtr<nsIReferrerInfo> referrerInfo =
ReferrerInfo::CreateForSVGResources(OwnerDoc());
mPathTracker.ResetToURIFragmentID(aParent, targetURI, referrerInfo);
} else {
// if we don't have a parent, then there's no animateMotion element
// depending on our target, so there's no point tracking it right now.
mPathTracker.Unlink();
}
// Start observing new target (if any)
if (mPathTracker.get()) {
mPathTracker.get()->AddMutationObserver(this);
}
NotifyParentOfMpathChange(aParent);
}
void SVGMPathElement::UnlinkHrefTarget(bool aNotifyParent) {
// Stop observing old target (if any)
if (mPathTracker.get()) {
mPathTracker.get()->RemoveMutationObserver(this);
}
mPathTracker.Unlink();
if (aNotifyParent) {
NotifyParentOfMpathChange(GetParent());
}
}
void SVGMPathElement::NotifyParentOfMpathChange(nsIContent* aParent) {
if (aParent && aParent->IsSVGElement(nsGkAtoms::animateMotion)) {
SVGAnimateMotionElement* animateMotionParent =
static_cast<SVGAnimateMotionElement*>(aParent);
animateMotionParent->MpathChanged();
AnimationNeedsResample();
}
}
} // namespace mozilla::dom
|
