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

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

content/base/src/nsTextNode.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 nsIDOMText node.
  */
 #include "nsTextNode.h"
 #include "mozilla/dom/TextBinding.h"
 #include "nsContentUtils.h"
 #include "mozilla/dom/DirectionalityUtils.h"
 #include "nsIDOMEventListener.h"
 #include "nsIDOMMutationEvent.h"
 #include "nsIDocument.h"
 #include "nsThreadUtils.h"
 #include "nsStubMutationObserver.h"
 #include "mozilla/IntegerPrintfMacros.h"
 #ifdef DEBUG
 #include "nsRange.h"
 #endif
 using namespace mozilla;
 using namespace mozilla::dom;
 /**
  * class used to implement attr() generated content
  */
 class nsAttributeTextNode MOZ_FINAL : public nsTextNode,
                                       public nsStubMutationObserver
 {
 public:
   NS_DECL_ISUPPORTS_INHERITED
   nsAttributeTextNode(already_AddRefed<nsINodeInfo>& aNodeInfo,
                       int32_t aNameSpaceID,
                       nsIAtom* aAttrName) :
     nsTextNode(aNodeInfo),
     mGrandparent(nullptr),
     mNameSpaceID(aNameSpaceID),
     mAttrName(aAttrName)
   {
     NS_ASSERTION(mNameSpaceID != kNameSpaceID_Unknown, "Must know namespace");
     NS_ASSERTION(mAttrName, "Must have attr name");
   }
   virtual ~nsAttributeTextNode() {
     NS_ASSERTION(!mGrandparent, "We were not unbound!");
   }
   virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                               nsIContent* aBindingParent,
                               bool aCompileEventHandlers);
   virtual void UnbindFromTree(bool aDeep = true,
                               bool aNullParent = true);
   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
   NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
   virtual nsGenericDOMDataNode *CloneDataNode(nsINodeInfo *aNodeInfo,
                                               bool aCloneText) const
   {
     already_AddRefed<nsINodeInfo> ni =
       nsCOMPtr<nsINodeInfo>(aNodeInfo).forget();
     nsAttributeTextNode *it = new nsAttributeTextNode(ni,
                                                       mNameSpaceID,
                                                       mAttrName);
     if (it && aCloneText) {
       it->mText = mText;
     }
     return it;
   }
   // Public method for the event to run
   void UpdateText() {
     UpdateText(true);
   }
 private:
   // Update our text to our parent's current attr value
   void UpdateText(bool aNotify);
   // This doesn't need to be a strong pointer because it's only non-null
   // while we're bound to the document tree, and it points to an ancestor
   // so the ancestor must be bound to the document tree the whole time
   // and can't be deleted.
   nsIContent* mGrandparent;
   // What attribute we're showing
   int32_t mNameSpaceID;
   nsCOMPtr<nsIAtom> mAttrName;
 };
 nsTextNode::~nsTextNode()
 {
 }
 NS_IMPL_ISUPPORTS_INHERITED(nsTextNode, nsGenericDOMDataNode, nsIDOMNode,
                             nsIDOMText, nsIDOMCharacterData)
 JSObject*
 nsTextNode::WrapNode(JSContext *aCx)
 {
   return TextBinding::Wrap(aCx, this);
 }
 bool
 nsTextNode::IsNodeOfType(uint32_t aFlags) const
 {
   return !(aFlags & ~(eCONTENT | eTEXT | eDATA_NODE));
 }
 nsGenericDOMDataNode*
 nsTextNode::CloneDataNode(nsINodeInfo *aNodeInfo, bool aCloneText) const
 {
   already_AddRefed<nsINodeInfo> ni = nsCOMPtr<nsINodeInfo>(aNodeInfo).forget();
   nsTextNode *it = new nsTextNode(ni);
   if (aCloneText) {
     it->mText = mText;
   }
   return it;
 }
 nsresult
 nsTextNode::AppendTextForNormalize(const char16_t* aBuffer, uint32_t aLength,
                                    bool aNotify, nsIContent* aNextSibling)
 {
   CharacterDataChangeInfo::Details details = {
     CharacterDataChangeInfo::Details::eMerge, aNextSibling
   };
   return SetTextInternal(mText.GetLength(), 0, aBuffer, aLength, aNotify, &details);
 }
 nsresult
 nsTextNode::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                        nsIContent* aBindingParent, bool aCompileEventHandlers)
 {
   nsresult rv = nsGenericDOMDataNode::BindToTree(aDocument, aParent,
                                                  aBindingParent,
                                                  aCompileEventHandlers);
   NS_ENSURE_SUCCESS(rv, rv);
   SetDirectionFromNewTextNode(this);
   return NS_OK;
 }
 void nsTextNode::UnbindFromTree(bool aDeep, bool aNullParent)
 {
   ResetDirectionSetByTextNode(this, aNullParent);
   nsGenericDOMDataNode::UnbindFromTree(aDeep, aNullParent);
 }
 #ifdef DEBUG
 void
 nsTextNode::List(FILE* out, int32_t aIndent) const
 {
   int32_t index;
   for (index = aIndent; --index >= 0; ) fputs("  ", out);
   fprintf(out, "Text@%p", static_cast<const void*>(this));
   fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
   if (IsCommonAncestorForRangeInSelection()) {
     typedef nsTHashtable<nsPtrHashKey<nsRange> > RangeHashTable;
     RangeHashTable* ranges =
       static_cast<RangeHashTable*>(GetProperty(nsGkAtoms::range));
     fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0);
   }
   fprintf(out, " primaryframe=%p", static_cast<void*>(GetPrimaryFrame()));
   fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get());
   nsAutoString tmp;
   ToCString(tmp, 0, mText.GetLength());
   fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
   fputs(">\n", out);
 }
 void
 nsTextNode::DumpContent(FILE* out, int32_t aIndent, bool aDumpAll) const
 {
   if(aDumpAll) {
     int32_t index;
     for (index = aIndent; --index >= 0; ) fputs("  ", out);
     nsAutoString tmp;
     ToCString(tmp, 0, mText.GetLength());
     if(!tmp.EqualsLiteral("\\n")) {
       fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
       if(aIndent) fputs("\n", out);
     }
   }
 }
 #endif
 nsresult
 NS_NewAttributeContent(nsNodeInfoManager *aNodeInfoManager,
                        int32_t aNameSpaceID, nsIAtom* aAttrName,
                        nsIContent** aResult)
 {
   NS_PRECONDITION(aNodeInfoManager, "Missing nodeInfoManager");
   NS_PRECONDITION(aAttrName, "Must have an attr name");
   NS_PRECONDITION(aNameSpaceID != kNameSpaceID_Unknown, "Must know namespace");
   *aResult = nullptr;
   already_AddRefed<nsINodeInfo> ni = aNodeInfoManager->GetTextNodeInfo();
   nsAttributeTextNode* textNode = new nsAttributeTextNode(ni,
                                                           aNameSpaceID,
                                                           aAttrName);
   if (!textNode) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   NS_ADDREF(*aResult = textNode);
   return NS_OK;
 }
 NS_IMPL_ISUPPORTS_INHERITED(nsAttributeTextNode, nsTextNode,
                             nsIMutationObserver)
 nsresult
 nsAttributeTextNode::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                                 nsIContent* aBindingParent,
                                 bool aCompileEventHandlers)
 {
   NS_PRECONDITION(aParent && aParent->GetParent(),
                   "This node can't be a child of the document or of the document root");
   nsresult rv = nsTextNode::BindToTree(aDocument, aParent,
                                        aBindingParent, aCompileEventHandlers);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ASSERTION(!mGrandparent, "We were already bound!");
   mGrandparent = aParent->GetParent();
   mGrandparent->AddMutationObserver(this);
   // Note that there is no need to notify here, since we have no
   // frame yet at this point.
   UpdateText(false);
   return NS_OK;
 }
 void
 nsAttributeTextNode::UnbindFromTree(bool aDeep, bool aNullParent)
 {
   // UnbindFromTree can be called anytime so we have to be safe.
   if (mGrandparent) {
     // aNullParent might not be true here, but we want to remove the
     // mutation observer anyway since we only need it while we're
     // in the document.
     mGrandparent->RemoveMutationObserver(this);
     mGrandparent = nullptr;
   }
   nsTextNode::UnbindFromTree(aDeep, aNullParent);
 }
 void
 nsAttributeTextNode::AttributeChanged(nsIDocument* aDocument,
                                       Element* aElement,
                                       int32_t aNameSpaceID,
                                       nsIAtom* aAttribute,
                                       int32_t aModType)
 {
   if (aNameSpaceID == mNameSpaceID && aAttribute == mAttrName &&
       aElement == mGrandparent) {
     // Since UpdateText notifies, do it when it's safe to run script.  Note
     // that if we get unbound while the event is up that's ok -- we'll just
     // have no grandparent when it fires, and will do nothing.
     void (nsAttributeTextNode::*update)() = &nsAttributeTextNode::UpdateText;
     nsCOMPtr<nsIRunnable> ev = NS_NewRunnableMethod(this, update);
     nsContentUtils::AddScriptRunner(ev);
   }
 }
 void
 nsAttributeTextNode::NodeWillBeDestroyed(const nsINode* aNode)
 {
   NS_ASSERTION(aNode == static_cast<nsINode*>(mGrandparent), "Wrong node!");
   mGrandparent = nullptr;
 }
 void
 nsAttributeTextNode::UpdateText(bool aNotify)
 {
   if (mGrandparent) {
     nsAutoString attrValue;
     mGrandparent->GetAttr(mNameSpaceID, mAttrName, attrValue);
     SetText(attrValue, aNotify);
   }
 }

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

content/base/src/nsTextNode.cpp