The Tor Browser: content/base/src/Attr.cpp@deefc01c0e14 (annotated)

content/base/src/Attr.cpp@deefc01c0e14 (annotated)

content/base/src/Attr.cpp

Thu, 15 Jan 2015 21:03:48 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 21:03:48 +0100
branch: TOR_BUG_9701
changeset 11: deefc01c0e14
permissions: -rw-r--r--

Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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/. */
 /*
  * Implementation of DOM Core's nsIDOMAttr node.
  */
 #include "mozilla/dom/Attr.h"
 #include "mozilla/dom/AttrBinding.h"
 #include "mozilla/dom/Element.h"
 #include "mozilla/EventDispatcher.h"
 #include "mozilla/InternalMutationEvent.h"
 #include "nsContentCreatorFunctions.h"
 #include "nsError.h"
 #include "nsUnicharUtils.h"
 #include "nsDOMString.h"
 #include "nsIContentInlines.h"
 #include "nsIDocument.h"
 #include "nsIDOMUserDataHandler.h"
 #include "nsGkAtoms.h"
 #include "nsCOMArray.h"
 #include "nsNameSpaceManager.h"
 #include "nsNodeUtils.h"
 #include "nsTextNode.h"
 #include "mozAutoDocUpdate.h"
 #include "nsWrapperCacheInlines.h"
 nsIAttribute::nsIAttribute(nsDOMAttributeMap* aAttrMap,
                            already_AddRefed<nsINodeInfo>& aNodeInfo,
                            bool aNsAware)
 : nsINode(aNodeInfo), mAttrMap(aAttrMap), mNsAware(aNsAware)
 {
 }
 nsIAttribute::~nsIAttribute()
 {
 }
 namespace mozilla {
 namespace dom {
 //----------------------------------------------------------------------
 bool Attr::sInitialized;
 Attr::Attr(nsDOMAttributeMap *aAttrMap,
            already_AddRefed<nsINodeInfo>&& aNodeInfo,
            const nsAString  &aValue, bool aNsAware)
   : nsIAttribute(aAttrMap, aNodeInfo, aNsAware), mValue(aValue)
 {
   NS_ABORT_IF_FALSE(mNodeInfo, "We must get a nodeinfo here!");
   NS_ABORT_IF_FALSE(mNodeInfo->NodeType() == nsIDOMNode::ATTRIBUTE_NODE,
                     "Wrong nodeType");
   // We don't add a reference to our content. It will tell us
   // to drop our reference when it goes away.
   SetIsDOMBinding();
 }
 NS_IMPL_CYCLE_COLLECTION_CLASS(Attr)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Attr)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
   if (!nsINode::Traverse(tmp, cb)) {
     return NS_SUCCESS_INTERRUPTED_TRAVERSE;
   }
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAttrMap)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Attr)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Attr)
   nsINode::Unlink(tmp);
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mAttrMap)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Attr)
   Element* ownerElement = tmp->GetElement();
   if (tmp->IsBlack()) {
     if (ownerElement) {
       // The attribute owns the element via attribute map so we can
       // mark it when the attribute is certainly alive.
       mozilla::dom::FragmentOrElement::MarkNodeChildren(ownerElement);
     }
     return true;
   }
   if (ownerElement &&
       mozilla::dom::FragmentOrElement::CanSkip(ownerElement, true)) {
     return true;
   }
 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Attr)
   return tmp->IsBlackAndDoesNotNeedTracing(static_cast<nsIAttribute*>(tmp));
 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Attr)
   return tmp->IsBlack();
 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
 // QueryInterface implementation for Attr
 NS_INTERFACE_TABLE_HEAD(Attr)
   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
   NS_INTERFACE_TABLE(Attr, nsINode, nsIDOMAttr, nsIAttribute, nsIDOMNode,
                      nsIDOMEventTarget, EventTarget)
   NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(Attr)
   NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
                                  new nsNodeSupportsWeakRefTearoff(this))
   NS_INTERFACE_MAP_ENTRY_TEAROFF(nsIDOMXPathNSResolver,
                                  new nsNode3Tearoff(this))
 NS_INTERFACE_MAP_END
 NS_IMPL_CYCLE_COLLECTING_ADDREF(Attr)
 NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(Attr,
                                                    nsNodeUtils::LastRelease(this))
 void
 Attr::SetMap(nsDOMAttributeMap *aMap)
 {
   if (mAttrMap && !aMap && sInitialized) {
     // We're breaking a relationship with content and not getting a new one,
     // need to locally cache value. GetValue() does that.
     GetValue(mValue);
   }
   mAttrMap = aMap;
 }
 Element*
 Attr::GetElement() const
 {
   if (!mAttrMap) {
     return nullptr;
   }
   nsIContent* content = mAttrMap->GetContent();
   return content ? content->AsElement() : nullptr;
 }
 nsresult
 Attr::SetOwnerDocument(nsIDocument* aDocument)
 {
   NS_ASSERTION(aDocument, "Missing document");
   nsIDocument *doc = OwnerDoc();
   NS_ASSERTION(doc != aDocument, "bad call to Attr::SetOwnerDocument");
   doc->DeleteAllPropertiesFor(this);
   nsCOMPtr<nsINodeInfo> newNodeInfo;
   newNodeInfo = aDocument->NodeInfoManager()->
     GetNodeInfo(mNodeInfo->NameAtom(), mNodeInfo->GetPrefixAtom(),
                 mNodeInfo->NamespaceID(),
                 nsIDOMNode::ATTRIBUTE_NODE);
   NS_ASSERTION(newNodeInfo, "GetNodeInfo lies");
   mNodeInfo.swap(newNodeInfo);
   return NS_OK;
 }
 NS_IMETHODIMP
 Attr::GetName(nsAString& aName)
 {
   aName = NodeName();
   return NS_OK;
 }
 already_AddRefed<nsIAtom>
 Attr::GetNameAtom(nsIContent* aContent)
 {
   if (!mNsAware &&
       mNodeInfo->NamespaceID() == kNameSpaceID_None &&
       aContent->IsInHTMLDocument() &&
       aContent->IsHTML()) {
     nsString name;
     mNodeInfo->GetName(name);
     nsAutoString lowercaseName;
     nsContentUtils::ASCIIToLower(name, lowercaseName);
     return do_GetAtom(lowercaseName);
   }
   nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom();
   return nameAtom.forget();
 }
 NS_IMETHODIMP
 Attr::GetValue(nsAString& aValue)
 {
   Element* element = GetElement();
   if (element) {
     nsCOMPtr<nsIAtom> nameAtom = GetNameAtom(element);
     element->GetAttr(mNodeInfo->NamespaceID(), nameAtom, aValue);
   }
   else {
     aValue = mValue;
   }
   return NS_OK;
 }
 void
 Attr::SetValue(const nsAString& aValue, ErrorResult& aRv)
 {
   Element* element = GetElement();
   if (!element) {
     mValue = aValue;
     return;
   }
   nsCOMPtr<nsIAtom> nameAtom = GetNameAtom(element);
   aRv = element->SetAttr(mNodeInfo->NamespaceID(),
                          nameAtom,
                          mNodeInfo->GetPrefixAtom(),
                          aValue,
                          true);
 }
 NS_IMETHODIMP
 Attr::SetValue(const nsAString& aValue)
 {
   ErrorResult rv;
   SetValue(aValue, rv);
   return rv.ErrorCode();
 }
 bool
 Attr::Specified() const
 {
   return true;
 }
 NS_IMETHODIMP
 Attr::GetSpecified(bool* aSpecified)
 {
   NS_ENSURE_ARG_POINTER(aSpecified);
   *aSpecified = Specified();
   return NS_OK;
 }
 Element*
 Attr::GetOwnerElement(ErrorResult& aRv)
 {
   OwnerDoc()->WarnOnceAbout(nsIDocument::eOwnerElement);
   return GetElement();
 }
 NS_IMETHODIMP
 Attr::GetOwnerElement(nsIDOMElement** aOwnerElement)
 {
   NS_ENSURE_ARG_POINTER(aOwnerElement);
   OwnerDoc()->WarnOnceAbout(nsIDocument::eOwnerElement);
   Element* element = GetElement();
   if (element) {
     return CallQueryInterface(element, aOwnerElement);
   }
   *aOwnerElement = nullptr;
   return NS_OK;
 }
 void
 Attr::GetNodeValueInternal(nsAString& aNodeValue)
 {
   OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue);
   GetValue(aNodeValue);
 }
 void
 Attr::SetNodeValueInternal(const nsAString& aNodeValue, ErrorResult& aError)
 {
   OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue);
   aError = SetValue(aNodeValue);
 }
 nsresult
 Attr::Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const
 {
   nsAutoString value;
   const_cast<Attr*>(this)->GetValue(value);
   nsCOMPtr<nsINodeInfo> ni = aNodeInfo;
   *aResult = new Attr(nullptr, ni.forget(), value, mNsAware);
   if (!*aResult) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   NS_ADDREF(*aResult);
   return NS_OK;
 }
 already_AddRefed<nsIURI>
 Attr::GetBaseURI(bool aTryUseXHRDocBaseURI) const
 {
   Element* parent = GetElement();
   return parent ? parent->GetBaseURI(aTryUseXHRDocBaseURI) : nullptr;
 }
 void
 Attr::GetTextContentInternal(nsAString& aTextContent)
 {
   OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent);
   GetValue(aTextContent);
 }
 void
 Attr::SetTextContentInternal(const nsAString& aTextContent,
                              ErrorResult& aError)
 {
   OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent);
   SetNodeValueInternal(aTextContent, aError);
 }
 NS_IMETHODIMP
 Attr::GetIsId(bool* aReturn)
 {
   Element* element = GetElement();
   if (!element) {
     *aReturn = false;
     return NS_OK;
   }
   nsIAtom* idAtom = element->GetIDAttributeName();
   if (!idAtom) {
     *aReturn = false;
     return NS_OK;
   }
   *aReturn = mNodeInfo->Equals(idAtom, kNameSpaceID_None);
   return NS_OK;
 }
 bool
 Attr::IsNodeOfType(uint32_t aFlags) const
 {
     return !(aFlags & ~eATTRIBUTE);
 }
 uint32_t
 Attr::GetChildCount() const
 {
   return 0;
 }
 nsIContent *
 Attr::GetChildAt(uint32_t aIndex) const
 {
   return nullptr;
 }
 nsIContent * const *
 Attr::GetChildArray(uint32_t* aChildCount) const
 {
   *aChildCount = 0;
   return nullptr;
 }
 int32_t
 Attr::IndexOf(const nsINode* aPossibleChild) const
 {
   return -1;
 }
 nsresult
 Attr::InsertChildAt(nsIContent* aKid, uint32_t aIndex,
                               bool aNotify)
 {
   return NS_ERROR_NOT_IMPLEMENTED;
 }
 void
 Attr::RemoveChildAt(uint32_t aIndex, bool aNotify)
 {
 }
 nsresult
 Attr::PreHandleEvent(EventChainPreVisitor& aVisitor)
 {
   aVisitor.mCanHandle = true;
   return NS_OK;
 }
 void
 Attr::Initialize()
 {
   sInitialized = true;
 }
 void
 Attr::Shutdown()
 {
   sInitialized = false;
 }
 JSObject*
 Attr::WrapObject(JSContext* aCx)
 {
   return AttrBinding::Wrap(aCx, this);
 }
 } // namespace dom
 } // namespace mozilla

The Tor Browser / annotate

content/base/src/Attr.cpp@deefc01c0e14 (annotated)

content/base/src/Attr.cpp