dom/html/HTMLTemplateElement.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/HTMLTemplateElement.h"
   8 #include "mozilla/dom/HTMLTemplateElementBinding.h"
   9
  10 #include "mozilla/dom/Document.h"
  11 #include "mozilla/dom/NameSpaceConstants.h"
  12 #include "mozilla/dom/ShadowRootBinding.h"
  13 #include "nsGenericHTMLElement.h"
  14 #include "nsGkAtoms.h"
  15 #include "nsStyleConsts.h"
  16 #include "nsAtom.h"
  17
  18 NS_IMPL_NS_NEW_HTML_ELEMENT(Template)
  19
  20 namespace mozilla::dom {
  21
  22 static constexpr nsAttrValue::EnumTable kShadowRootModeTable[] = {
  23     {"open", ShadowRootMode::Open},
  24     {"closed", ShadowRootMode::Closed},
  25     {nullptr, {}}};
  26
  27 const nsAttrValue::EnumTable* kShadowRootModeDefault = &kShadowRootModeTable[2];
  28
  29 HTMLTemplateElement::HTMLTemplateElement(
  30     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  31     : nsGenericHTMLElement(std::move(aNodeInfo)) {
  32   SetHasWeirdParserInsertionMode();
  33
  34   Document* contentsOwner = OwnerDoc()->GetTemplateContentsOwner();
  35   if (!contentsOwner) {
  36     MOZ_CRASH("There should always be a template contents owner.");
  37   }
  38
  39   mContent = contentsOwner->CreateDocumentFragment();
  40   mContent->SetHost(this);
  41 }
  42
  43 HTMLTemplateElement::~HTMLTemplateElement() {
  44   if (mContent && mContent->GetHost() == this) {
  45     mContent->SetHost(nullptr);
  46   }
  47 }
  48
  49 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLTemplateElement,
  50                                                nsGenericHTMLElement)
  51
  52 NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLTemplateElement)
  53
  54 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLTemplateElement,
  55                                                 nsGenericHTMLElement)
  56   if (tmp->mContent) {
  57     if (tmp->mContent->GetHost() == tmp) {
  58       tmp->mContent->SetHost(nullptr);
  59     }
  60     tmp->mContent = nullptr;
  61   }
  62 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  63
  64 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLTemplateElement,
  65                                                   nsGenericHTMLElement)
  66   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mContent)
  67 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  68
  69 NS_IMPL_ELEMENT_CLONE(HTMLTemplateElement)
  70
  71 JSObject* HTMLTemplateElement::WrapNode(JSContext* aCx,
  72                                         JS::Handle<JSObject*> aGivenProto) {
  73   return HTMLTemplateElement_Binding::Wrap(aCx, this, aGivenProto);
  74 }
  75
  76 void HTMLTemplateElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
  77                                        const nsAttrValue* aValue,
  78                                        const nsAttrValue* aOldValue,
  79                                        nsIPrincipal* aMaybeScriptedPrincipal,
  80                                        bool aNotify) {
  81   if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::shadowrootmode &&
  82       aValue && aValue->Type() == nsAttrValue::ValueType::eEnum &&
  83       !mShadowRootMode.isSome()) {
  84     mShadowRootMode.emplace(
  85         static_cast<ShadowRootMode>(aValue->GetEnumValue()));
  86   }
  87
  88   nsGenericHTMLElement::AfterSetAttr(aNamespaceID, aName, aValue, aOldValue,
  89                                      aMaybeScriptedPrincipal, aNotify);
  90 }
  91
  92 bool HTMLTemplateElement::ParseAttribute(int32_t aNamespaceID,
  93                                          nsAtom* aAttribute,
  94                                          const nsAString& aValue,
  95                                          nsIPrincipal* aMaybeScriptedPrincipal,
  96                                          nsAttrValue& aResult) {
  97   if (aNamespaceID == kNameSpaceID_None &&
  98       aAttribute == nsGkAtoms::shadowrootmode) {
  99     return aResult.ParseEnumValue(aValue, kShadowRootModeTable, false, nullptr);
 100   }
 101   return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
 102                                               aMaybeScriptedPrincipal, aResult);
 103 }
 104
 105 void HTMLTemplateElement::SetHTMLUnsafe(const nsAString& aHTML) {
 106   RefPtr<DocumentFragment> content = mContent;
 107   nsContentUtils::SetHTMLUnsafe(content, this, aHTML);
 108 }
 109
 110 }  // namespace mozilla::dom