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/* -*- 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/Document.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);
}
void SVGMPathElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) {
if (aName == nsGkAtoms::href) {
if (aValue) {
if ((aNamespaceID == kNameSpaceID_XLink ||
aNamespaceID == kNameSpaceID_None) &&
IsInComposedDoc()) {
// Note: If we fail the IsInComposedDoc 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->GetStringValue());
}
}
} else {
// 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(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;
}
return SVGGeometryElement::FromNodeOrNull(mPathTracker.get());
}
//----------------------------------------------------------------------
// 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 =
OwnerDoc()->ReferrerInfoForInternalCSSAndSVGResources();
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 (auto* animateMotionParent =
SVGAnimateMotionElement::FromNodeOrNull(aParent)) {
animateMotionParent->MpathChanged();
AnimationNeedsResample();
}
}
} // namespace mozilla::dom
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