dom/svg/SVGMPathElement.cpp

   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 "nsDebug.h"
  10 #include "mozilla/ArrayUtils.h"
  11 #include "mozilla/SVGObserverUtils.h"
  12 #include "mozilla/dom/Document.h"
  13 #include "mozilla/dom/SVGAnimateMotionElement.h"
  14 #include "mozilla/dom/SVGGeometryElement.h"
  15 #include "nsContentUtils.h"
  16 #include "nsIReferrerInfo.h"
  17 #include "mozilla/dom/SVGMPathElementBinding.h"
  18 #include "nsIURI.h"
  19
  20 NS_IMPL_NS_NEW_SVG_ELEMENT(MPath)
  21
  22 namespace mozilla::dom {
  23
  24 JSObject* SVGMPathElement::WrapNode(JSContext* aCx,
  25                                     JS::Handle<JSObject*> aGivenProto) {
  26   return SVGMPathElement_Binding::Wrap(aCx, this, aGivenProto);
  27 }
  28
  29 SVGElement::StringInfo SVGMPathElement::sStringInfo[2] = {
  30     {nsGkAtoms::href, kNameSpaceID_None, false},
  31     {nsGkAtoms::href, kNameSpaceID_XLink, false}};
  32
  33 // Cycle collection magic -- based on SVGUseElement
  34 NS_IMPL_CYCLE_COLLECTION_CLASS(SVGMPathElement)
  35
  36 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGMPathElement,
  37                                                 SVGMPathElementBase)
  38   tmp->mMPathObserver = nullptr;
  39 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  40
  41 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGMPathElement,
  42                                                   SVGMPathElementBase)
  43   SVGObserverUtils::TraverseMPathObserver(tmp, &cb);
  44 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  45
  46 //----------------------------------------------------------------------
  47 // nsISupports methods
  48
  49 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(SVGMPathElement,
  50                                                SVGMPathElementBase)
  51
  52 // Constructor
  53 SVGMPathElement::SVGMPathElement(
  54     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  55     : SVGMPathElementBase(std::move(aNodeInfo)) {}
  56
  57 //----------------------------------------------------------------------
  58 // nsINode methods
  59
  60 NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGMPathElement)
  61
  62 already_AddRefed<DOMSVGAnimatedString> SVGMPathElement::Href() {
  63   return mStringAttributes[HREF].IsExplicitlySet()
  64              ? mStringAttributes[HREF].ToDOMAnimatedString(this)
  65              : mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);
  66 }
  67
  68 //----------------------------------------------------------------------
  69 // nsIContent methods
  70
  71 void SVGMPathElement::UnbindFromTree(bool aNullParent) {
  72   mMPathObserver = nullptr;
  73   NotifyParentOfMpathChange();
  74   SVGMPathElementBase::UnbindFromTree(aNullParent);
  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                               ArrayLength(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