dom/svg/SVGStyleElement.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/SVGStyleElement.h"
   8
   9 #include "mozilla/RefPtr.h"
  10 #include "mozilla/dom/Document.h"
  11 #include "mozilla/dom/Element.h"
  12 #include "mozilla/dom/FetchPriority.h"
  13 #include "mozilla/dom/ReferrerInfo.h"
  14 #include "mozilla/dom/SVGStyleElementBinding.h"
  15 #include "nsCOMPtr.h"
  16 #include "nsContentUtils.h"
  17
  18 NS_IMPL_NS_NEW_SVG_ELEMENT(Style)
  19
  20 namespace mozilla::dom {
  21
  22 JSObject* SVGStyleElement::WrapNode(JSContext* aCx,
  23                                     JS::Handle<JSObject*> aGivenProto) {
  24   return SVGStyleElement_Binding::Wrap(aCx, this, aGivenProto);
  25 }
  26
  27 //----------------------------------------------------------------------
  28 // nsISupports methods
  29
  30 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(SVGStyleElement,
  31                                              SVGStyleElementBase,
  32                                              nsIMutationObserver)
  33
  34 NS_IMPL_CYCLE_COLLECTION_CLASS(SVGStyleElement)
  35
  36 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGStyleElement,
  37                                                   SVGStyleElementBase)
  38   tmp->LinkStyle::Traverse(cb);
  39 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  40
  41 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGStyleElement,
  42                                                 SVGStyleElementBase)
  43   tmp->LinkStyle::Unlink();
  44 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  45
  46 //----------------------------------------------------------------------
  47 // Implementation
  48
  49 SVGStyleElement::SVGStyleElement(
  50     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  51     : SVGStyleElementBase(std::move(aNodeInfo)) {
  52   AddMutationObserver(this);
  53   SetEnabledCallbacks(kCharacterDataChanged | kContentAppended |
  54                       kContentInserted | kContentWillBeRemoved);
  55 }
  56
  57 //----------------------------------------------------------------------
  58 // nsINode methods
  59
  60 NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGStyleElement)
  61
  62 //----------------------------------------------------------------------
  63 // nsIContent methods
  64
  65 nsresult SVGStyleElement::BindToTree(BindContext& aContext, nsINode& aParent) {
  66   nsresult rv = SVGStyleElementBase::BindToTree(aContext, aParent);
  67   NS_ENSURE_SUCCESS(rv, rv);
  68   LinkStyle::BindToTree();
  69   return rv;
  70 }
  71
  72 void SVGStyleElement::UnbindFromTree(UnbindContext& aContext) {
  73   nsCOMPtr<Document> oldDoc = GetUncomposedDoc();
  74   ShadowRoot* oldShadow = GetContainingShadow();
  75   SVGStyleElementBase::UnbindFromTree(aContext);
  76   Unused << UpdateStyleSheetInternal(oldDoc, oldShadow);
  77 }
  78
  79 void SVGStyleElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
  80                                    const nsAttrValue* aValue,
  81                                    const nsAttrValue* aOldValue,
  82                                    nsIPrincipal* aMaybeScriptedPrincipal,
  83                                    bool aNotify) {
  84   if (aNameSpaceID == kNameSpaceID_None) {
  85     if (aName == nsGkAtoms::title || aName == nsGkAtoms::media ||
  86         aName == nsGkAtoms::type) {
  87       Unused << UpdateStyleSheetInternal(nullptr, nullptr, ForceUpdate::Yes);
  88     }
  89   }
  90
  91   return SVGStyleElementBase::AfterSetAttr(
  92       aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
  93 }
  94
  95 bool SVGStyleElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
  96                                      const nsAString& aValue,
  97                                      nsIPrincipal* aMaybeScriptedPrincipal,
  98                                      nsAttrValue& aResult) {
  99   if (aNamespaceID == kNameSpaceID_None &&
 100       aAttribute == nsGkAtoms::crossorigin) {
 101     ParseCORSValue(aValue, aResult);
 102     return true;
 103   }
 104
 105   return SVGStyleElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,
 106                                              aMaybeScriptedPrincipal, aResult);
 107 }
 108
 109 //----------------------------------------------------------------------
 110 // nsIMutationObserver methods
 111
 112 void SVGStyleElement::CharacterDataChanged(nsIContent* aContent,
 113                                            const CharacterDataChangeInfo&) {
 114   ContentChanged(aContent);
 115 }
 116
 117 void SVGStyleElement::ContentAppended(nsIContent* aFirstNewContent) {
 118   ContentChanged(aFirstNewContent->GetParent());
 119 }
 120
 121 void SVGStyleElement::ContentInserted(nsIContent* aChild) {
 122   ContentChanged(aChild);
 123 }
 124
 125 void SVGStyleElement::ContentWillBeRemoved(nsIContent* aChild) {
 126   if (nsContentUtils::IsInSameAnonymousTree(this, aChild)) {
 127     // Make sure to run this once the removal has taken place.
 128     nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
 129         "SVGStyleElement::ContentWillBeRemoved",
 130         [self = RefPtr{this}] { self->UpdateStyleSheetInternal(); }));
 131   }
 132 }
 133
 134 void SVGStyleElement::ContentChanged(nsIContent* aContent) {
 135   if (nsContentUtils::IsInSameAnonymousTree(this, aContent)) {
 136     Unused << UpdateStyleSheetInternal(nullptr, nullptr);
 137   }
 138 }
 139
 140 //----------------------------------------------------------------------
 141
 142 void SVGStyleElement::GetMedia(nsAString& aMedia) {
 143   GetAttr(nsGkAtoms::media, aMedia);
 144 }
 145
 146 void SVGStyleElement::SetMedia(const nsAString& aMedia, ErrorResult& rv) {
 147   SetAttr(nsGkAtoms::media, aMedia, rv);
 148 }
 149
 150 void SVGStyleElement::GetType(nsAString& aType) {
 151   GetAttr(nsGkAtoms::type, aType);
 152 }
 153
 154 void SVGStyleElement::SetType(const nsAString& aType, ErrorResult& rv) {
 155   SetAttr(nsGkAtoms::type, aType, rv);
 156 }
 157
 158 void SVGStyleElement::GetTitle(nsAString& aTitle) {
 159   GetAttr(nsGkAtoms::title, aTitle);
 160 }
 161
 162 void SVGStyleElement::SetTitle(const nsAString& aTitle, ErrorResult& rv) {
 163   SetAttr(nsGkAtoms::title, aTitle, rv);
 164 }
 165
 166 bool SVGStyleElement::Disabled() const {
 167   StyleSheet* ss = GetSheet();
 168   return ss && ss->Disabled();
 169 }
 170
 171 void SVGStyleElement::SetDisabled(bool aDisabled) {
 172   if (StyleSheet* ss = GetSheet()) {
 173     ss->SetDisabled(aDisabled);
 174   }
 175 }
 176
 177 //----------------------------------------------------------------------
 178 // nsStyleLinkElement methods
 179
 180 Maybe<LinkStyle::SheetInfo> SVGStyleElement::GetStyleSheetInfo() {
 181   if (!IsCSSMimeTypeAttributeForStyleElement(*this)) {
 182     return Nothing();
 183   }
 184
 185   nsAutoString title;
 186   nsAutoString media;
 187   GetTitleAndMediaForElement(*this, title, media);
 188
 189   return Some(SheetInfo{
 190       *OwnerDoc(),
 191       this,
 192       nullptr,
 193       // FIXME(bug 1459822): Why doesn't this need a principal, but
 194       // HTMLStyleElement does?
 195       nullptr,
 196       // FIXME(bug 1459822): Why does this need a crossorigin attribute, but
 197       // HTMLStyleElement doesn't?
 198       MakeAndAddRef<ReferrerInfo>(*this),
 199       AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin)),
 200       title,
 201       media,
 202       /* integrity = */ u""_ns,
 203       /* nsStyleUtil::CSPAllowsInlineStyle takes care of nonce checking for
 204          inline styles. Bug 1607011 */
 205       /* nonce = */ u""_ns,
 206       HasAlternateRel::No,
 207       IsInline::Yes,
 208       IsExplicitlyEnabled::No,
 209       FetchPriority::Auto,
 210   });
 211 }
 212
 213 }  // namespace mozilla::dom