tor-browser

The Tor Browser
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SVGMPathElement.cpp (4485B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "mozilla/dom/SVGMPathElement.h"
      8 
      9 #include "mozilla/SVGObserverUtils.h"
     10 #include "mozilla/dom/Document.h"
     11 #include "mozilla/dom/SVGAnimateMotionElement.h"
     12 #include "mozilla/dom/SVGGeometryElement.h"
     13 #include "mozilla/dom/SVGMPathElementBinding.h"
     14 #include "nsContentUtils.h"
     15 #include "nsDebug.h"
     16 #include "nsIReferrerInfo.h"
     17 #include "nsIURI.h"
     18 
     19 NS_IMPL_NS_NEW_SVG_ELEMENT(MPath)
     20 
     21 namespace mozilla::dom {
     22 
     23 JSObject* SVGMPathElement::WrapNode(JSContext* aCx,
     24                                    JS::Handle<JSObject*> aGivenProto) {
     25  return SVGMPathElement_Binding::Wrap(aCx, this, aGivenProto);
     26 }
     27 
     28 SVGElement::StringInfo SVGMPathElement::sStringInfo[2] = {
     29    {nsGkAtoms::href, kNameSpaceID_None, false},
     30    {nsGkAtoms::href, kNameSpaceID_XLink, false}};
     31 
     32 // Cycle collection magic -- based on SVGUseElement
     33 NS_IMPL_CYCLE_COLLECTION_CLASS(SVGMPathElement)
     34 
     35 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGMPathElement,
     36                                                SVGMPathElementBase)
     37  tmp->mMPathObserver = nullptr;
     38 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
     39 
     40 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGMPathElement,
     41                                                  SVGMPathElementBase)
     42  SVGObserverUtils::TraverseMPathObserver(tmp, &cb);
     43 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
     44 
     45 //----------------------------------------------------------------------
     46 // nsISupports methods
     47 
     48 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(SVGMPathElement,
     49                                               SVGMPathElementBase)
     50 
     51 // Constructor
     52 SVGMPathElement::SVGMPathElement(
     53    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
     54    : SVGMPathElementBase(std::move(aNodeInfo)) {}
     55 
     56 //----------------------------------------------------------------------
     57 // nsINode methods
     58 
     59 NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGMPathElement)
     60 
     61 already_AddRefed<DOMSVGAnimatedString> SVGMPathElement::Href() {
     62  return mStringAttributes[HREF].IsExplicitlySet() ||
     63                 !mStringAttributes[XLINK_HREF].IsExplicitlySet()
     64             ? mStringAttributes[HREF].ToDOMAnimatedString(this)
     65             : mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);
     66 }
     67 
     68 //----------------------------------------------------------------------
     69 // nsIContent methods
     70 
     71 void SVGMPathElement::UnbindFromTree(UnbindContext& aContext) {
     72  mMPathObserver = nullptr;
     73  NotifyParentOfMpathChange();
     74  SVGMPathElementBase::UnbindFromTree(aContext);
     75 }
     76 
     77 void SVGMPathElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
     78                                   const nsAttrValue* aValue,
     79                                   const nsAttrValue* aOldValue,
     80                                   nsIPrincipal* aMaybeScriptedPrincipal,
     81                                   bool aNotify) {
     82  if (aName == nsGkAtoms::href &&
     83      (aNamespaceID == kNameSpaceID_None ||
     84       (aNamespaceID == kNameSpaceID_XLink && !HasAttr(nsGkAtoms::href)))) {
     85    mMPathObserver = nullptr;
     86    NotifyParentOfMpathChange();
     87  }
     88 
     89  return SVGMPathElementBase::AfterSetAttr(
     90      aNamespaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
     91 }
     92 
     93 //----------------------------------------------------------------------
     94 // SVGElement methods
     95 
     96 SVGElement::StringAttributesInfo SVGMPathElement::GetStringInfo() {
     97  return StringAttributesInfo(mStringAttributes, sStringInfo,
     98                              std::size(sStringInfo));
     99 }
    100 
    101 //----------------------------------------------------------------------
    102 // Public helper methods
    103 
    104 void SVGMPathElement::HrefAsString(nsAString& aHref) {
    105  if (mStringAttributes[SVGMPathElement::HREF].IsExplicitlySet()) {
    106    mStringAttributes[SVGMPathElement::HREF].GetBaseValue(aHref, this);
    107  } else {
    108    mStringAttributes[SVGMPathElement::XLINK_HREF].GetBaseValue(aHref, this);
    109  }
    110 }
    111 
    112 SVGGeometryElement* SVGMPathElement::GetReferencedPath() {
    113  return SVGObserverUtils::GetAndObserveMPathsPath(this);
    114 }
    115 
    116 void SVGMPathElement::NotifyParentOfMpathChange() {
    117  if (auto* animateMotionParent =
    118          SVGAnimateMotionElement::FromNodeOrNull(GetParent())) {
    119    animateMotionParent->MpathChanged();
    120    AnimationNeedsResample();
    121  }
    122 }
    123 
    124 }  // namespace mozilla::dom