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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/. */
#ifndef DOM_SVG_SVGMPATHELEMENT_H_
#define DOM_SVG_SVGMPATHELEMENT_H_
#include "mozilla/dom/IDTracker.h"
#include "mozilla/dom/SVGElement.h"
#include "nsStubMutationObserver.h"
#include "SVGAnimatedString.h"
nsresult NS_NewSVGMPathElement(
nsIContent** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
namespace mozilla::dom {
class SVGGeometryElement;
using SVGMPathElementBase = SVGElement;
class SVGMPathElement final : public SVGMPathElementBase,
public nsStubMutationObserver {
protected:
friend nsresult(::NS_NewSVGMPathElement(
nsIContent** aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
explicit SVGMPathElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
~SVGMPathElement();
JSObject* WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
public:
// interfaces:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGMPathElement, SVGMPathElementBase)
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
// nsIContent interface
nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
nsresult BindToTree(BindContext&, nsINode& aParent) override;
void UnbindFromTree(bool aNullParent) override;
// Element specializations
void AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue, const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) override;
// Public helper method: If our xlink:href attribute links to a Shape
// element, this method returns a pointer to that element. Otherwise,
// this returns nullptr.
SVGGeometryElement* GetReferencedPath();
// WebIDL
already_AddRefed<DOMSVGAnimatedString> Href();
protected:
/**
* Helper that provides a reference to the 'path' element with the ID that is
* referenced by the 'mpath' element's 'href' attribute, and that will
* invalidate the parent of the 'mpath' and update mutation observers to the
* new path element if the element that that ID identifies changes to a
* different element (or none).
*/
class PathElementTracker final : public IDTracker {
public:
explicit PathElementTracker(SVGMPathElement* aMpathElement)
: mMpathElement(aMpathElement) {}
protected:
// We need to be notified when target changes, in order to request a sample
// (which will clear animation effects that used the old target-path
// and recompute the animation effects using the new target-path).
void ElementChanged(Element* aFrom, Element* aTo) override {
IDTracker::ElementChanged(aFrom, aTo);
if (aFrom) {
aFrom->RemoveMutationObserver(mMpathElement);
}
if (aTo) {
aTo->AddMutationObserver(mMpathElement);
}
mMpathElement->NotifyParentOfMpathChange(mMpathElement->GetParent());
}
// We need to override IsPersistent to get persistent tracking (beyond the
// first time the target changes)
bool IsPersistent() override { return true; }
private:
SVGMPathElement* const mMpathElement;
};
StringAttributesInfo GetStringInfo() override;
void UpdateHrefTarget(nsIContent* aParent, const nsAString& aHrefStr);
void UnlinkHrefTarget(bool aNotifyParent);
void NotifyParentOfMpathChange(nsIContent* aParent);
enum { HREF, XLINK_HREF };
SVGAnimatedString mStringAttributes[2];
static StringInfo sStringInfo[2];
PathElementTracker mPathTracker;
};
} // namespace mozilla::dom
#endif // DOM_SVG_SVGMPATHELEMENT_H_
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