The Tor Browser: dom/xbl/nsXBLContentSink.cpp@b8a032363ba2 (annotated)

dom/xbl/nsXBLContentSink.cpp@b8a032363ba2 (annotated)

dom/xbl/nsXBLContentSink.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- 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/. */
 #include "mozilla/ArrayUtils.h"
 #include "nsXBLContentSink.h"
 #include "nsIDocument.h"
 #include "nsBindingManager.h"
 #include "nsIDOMNode.h"
 #include "nsGkAtoms.h"
 #include "nsNameSpaceManager.h"
 #include "nsIURI.h"
 #include "nsTextFragment.h"
 #ifdef MOZ_XUL
 #include "nsXULElement.h"
 #endif
 #include "nsXBLProtoImplProperty.h"
 #include "nsXBLProtoImplMethod.h"
 #include "nsXBLProtoImplField.h"
 #include "nsXBLPrototypeBinding.h"
 #include "nsContentUtils.h"
 #include "nsIConsoleService.h"
 #include "nsIScriptError.h"
 #include "nsNodeInfoManager.h"
 #include "nsINodeInfo.h"
 #include "nsIPrincipal.h"
 #include "mozilla/dom/Element.h"
 using namespace mozilla;
 using namespace mozilla::dom;
 nsresult
 NS_NewXBLContentSink(nsIXMLContentSink** aResult,
                      nsIDocument* aDoc,
                      nsIURI* aURI,
                      nsISupports* aContainer)
 {
   NS_ENSURE_ARG_POINTER(aResult);
   nsXBLContentSink* it = new nsXBLContentSink();
   NS_ENSURE_TRUE(it, NS_ERROR_OUT_OF_MEMORY);
   nsCOMPtr<nsIXMLContentSink> kungFuDeathGrip = it;
   nsresult rv = it->Init(aDoc, aURI, aContainer);
   NS_ENSURE_SUCCESS(rv, rv);
   return CallQueryInterface(it, aResult);
 }
 nsXBLContentSink::nsXBLContentSink()
   : mState(eXBL_InDocument),
     mSecondaryState(eXBL_None),
     mDocInfo(nullptr),
     mIsChromeOrResource(false),
     mFoundFirstBinding(false),
     mBinding(nullptr),
     mHandler(nullptr),
     mImplementation(nullptr),
     mImplMember(nullptr),
     mImplField(nullptr),
     mProperty(nullptr),
     mMethod(nullptr),
     mField(nullptr)
 {
   mPrettyPrintXML = false;
 }
 nsXBLContentSink::~nsXBLContentSink()
 {
 }
 nsresult
 nsXBLContentSink::Init(nsIDocument* aDoc,
                        nsIURI* aURI,
                        nsISupports* aContainer)
 {
   nsresult rv;
   rv = nsXMLContentSink::Init(aDoc, aURI, aContainer, nullptr);
   return rv;
 }
 void
 nsXBLContentSink::MaybeStartLayout(bool aIgnorePendingSheets)
 {
   return;
 }
 nsresult
 nsXBLContentSink::FlushText(bool aReleaseTextNode)
 {
   if (mTextLength != 0) {
     const nsASingleFragmentString& text = Substring(mText, mText+mTextLength);
     if (mState == eXBL_InHandlers) {
       NS_ASSERTION(mBinding, "Must have binding here");
       // Get the text and add it to the event handler.
       if (mSecondaryState == eXBL_InHandler)
         mHandler->AppendHandlerText(text);
       mTextLength = 0;
       return NS_OK;
     }
     else if (mState == eXBL_InImplementation) {
       NS_ASSERTION(mBinding, "Must have binding here");
       if (mSecondaryState == eXBL_InConstructor ||
           mSecondaryState == eXBL_InDestructor) {
         // Construct a method for the constructor/destructor.
         nsXBLProtoImplMethod* method;
         if (mSecondaryState == eXBL_InConstructor)
           method = mBinding->GetConstructor();
         else
           method = mBinding->GetDestructor();
         // Get the text and add it to the constructor/destructor.
         method->AppendBodyText(text);
       }
       else if (mSecondaryState == eXBL_InGetter ||
                mSecondaryState == eXBL_InSetter) {
         // Get the text and add it to the getter/setter
         if (mSecondaryState == eXBL_InGetter)
           mProperty->AppendGetterText(text);
         else
           mProperty->AppendSetterText(text);
       }
       else if (mSecondaryState == eXBL_InBody) {
         // Get the text and add it to the method
         if (mMethod)
           mMethod->AppendBodyText(text);
       }
       else if (mSecondaryState == eXBL_InField) {
         // Get the text and add it to the method
         if (mField)
           mField->AppendFieldText(text);
       }
       mTextLength = 0;
       return NS_OK;
     }
     nsIContent* content = GetCurrentContent();
     if (content &&
         (content->NodeInfo()->NamespaceEquals(kNameSpaceID_XBL) ||
          (content->NodeInfo()->NamespaceEquals(kNameSpaceID_XUL) &&
           content->Tag() != nsGkAtoms::label &&
           content->Tag() != nsGkAtoms::description))) {
       bool isWS = true;
       if (mTextLength > 0) {
         const char16_t* cp = mText;
         const char16_t* end = mText + mTextLength;
         while (cp < end) {
           char16_t ch = *cp++;
           if (!dom::IsSpaceCharacter(ch)) {
             isWS = false;
             break;
           }
         }
       }
       if (isWS && mTextLength > 0) {
         mTextLength = 0;
         // Make sure to drop the textnode, if any
         return nsXMLContentSink::FlushText(aReleaseTextNode);
       }
     }
   }
   return nsXMLContentSink::FlushText(aReleaseTextNode);
 }
 NS_IMETHODIMP
 nsXBLContentSink::ReportError(const char16_t* aErrorText,
                               const char16_t* aSourceText,
                               nsIScriptError *aError,
                               bool *_retval)
 {
   NS_PRECONDITION(aError && aSourceText && aErrorText, "Check arguments!!!");
   // XXX FIXME This function overrides and calls on
   // nsXMLContentSink::ReportError, and probably should die.  See bug 347826.
   // XXX We should make sure the binding has no effect, but that it also
   // gets destroyed properly without leaking.  Perhaps we should even
   // ensure that the content that was bound is displayed with no
   // binding.
 #ifdef DEBUG
   // Report the error to stderr.
   fprintf(stderr,
           "\n%s\n%s\n\n",
           NS_LossyConvertUTF16toASCII(aErrorText).get(),
           NS_LossyConvertUTF16toASCII(aSourceText).get());
 #endif
   // Most of what this does won't be too useful, but whatever...
   // nsXMLContentSink::ReportError will handle the console logging.
   return nsXMLContentSink::ReportError(aErrorText,
                                        aSourceText,
                                        aError,
                                        _retval);
 }
 nsresult
 nsXBLContentSink::ReportUnexpectedElement(nsIAtom* aElementName,
                                           uint32_t aLineNumber)
 {
   // XXX we should really somehow stop the parse and drop the binding
   // instead of just letting the XML sink build the content model like
   // we do...
   mState = eXBL_Error;
   nsAutoString elementName;
   aElementName->ToString(elementName);
   const char16_t* params[] = { elementName.get() };
   return nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
                                          NS_LITERAL_CSTRING("XBL Content Sink"),
                                          mDocument,
                                          nsContentUtils::eXBL_PROPERTIES,
                                          "UnexpectedElement",
                                          params, ArrayLength(params),
                                          nullptr,
                                          EmptyString() /* source line */,
                                          aLineNumber);
 }
 void
 nsXBLContentSink::AddMember(nsXBLProtoImplMember* aMember)
 {
   // Add this member to our chain.
   if (mImplMember)
     mImplMember->SetNext(aMember); // Already have a chain. Just append to the end.
   else
     mImplementation->SetMemberList(aMember); // We're the first member in the chain.
   mImplMember = aMember; // Adjust our pointer to point to the new last member in the chain.
 }
 void
 nsXBLContentSink::AddField(nsXBLProtoImplField* aField)
 {
   // Add this field to our chain.
   if (mImplField)
     mImplField->SetNext(aField); // Already have a chain. Just append to the end.
   else
     mImplementation->SetFieldList(aField); // We're the first member in the chain.
   mImplField = aField; // Adjust our pointer to point to the new last field in the chain.
 }
 NS_IMETHODIMP
 nsXBLContentSink::HandleStartElement(const char16_t *aName,
                                      const char16_t **aAtts,
                                      uint32_t aAttsCount,
                                      int32_t aIndex,
                                      uint32_t aLineNumber)
 {
   nsresult rv = nsXMLContentSink::HandleStartElement(aName,aAtts,aAttsCount,aIndex,aLineNumber);
   if (NS_FAILED(rv))
     return rv;
   if (mState == eXBL_InBinding && !mBinding) {
     rv = ConstructBinding(aLineNumber);
     if (NS_FAILED(rv))
       return rv;
     // mBinding may still be null, if the binding had no id.  If so,
     // we'll deal with that later in the sink.
   }
   return rv;
 }
 NS_IMETHODIMP
 nsXBLContentSink::HandleEndElement(const char16_t *aName)
 {
   FlushText();
   if (mState != eXBL_InDocument) {
     int32_t nameSpaceID;
     nsCOMPtr<nsIAtom> prefix, localName;
     nsContentUtils::SplitExpatName(aName, getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     if (nameSpaceID == kNameSpaceID_XBL) {
       if (mState == eXBL_Error) {
         // Check whether we've opened this tag before; we may not have if
         // it was a real XBL tag before the error occurred.
         if (!GetCurrentContent()->NodeInfo()->Equals(localName,
                                                      nameSpaceID)) {
           // OK, this tag was never opened as far as the XML sink is
           // concerned.  Just drop the HandleEndElement
           return NS_OK;
         }
       }
       else if (mState == eXBL_InHandlers) {
         if (localName == nsGkAtoms::handlers) {
           mState = eXBL_InBinding;
           mHandler = nullptr;
         }
         else if (localName == nsGkAtoms::handler)
           mSecondaryState = eXBL_None;
         return NS_OK;
       }
       else if (mState == eXBL_InResources) {
         if (localName == nsGkAtoms::resources)
           mState = eXBL_InBinding;
         return NS_OK;
       }
       else if (mState == eXBL_InImplementation) {
         if (localName == nsGkAtoms::implementation)
           mState = eXBL_InBinding;
         else if (localName == nsGkAtoms::property) {
           mSecondaryState = eXBL_None;
           mProperty = nullptr;
         }
         else if (localName == nsGkAtoms::method) {
           mSecondaryState = eXBL_None;
           mMethod = nullptr;
         }
         else if (localName == nsGkAtoms::field) {
           mSecondaryState = eXBL_None;
           mField = nullptr;
         }
         else if (localName == nsGkAtoms::constructor ||
                  localName == nsGkAtoms::destructor)
           mSecondaryState = eXBL_None;
         else if (localName == nsGkAtoms::getter ||
                  localName == nsGkAtoms::setter)
           mSecondaryState = eXBL_InProperty;
         else if (localName == nsGkAtoms::parameter ||
                  localName == nsGkAtoms::body)
           mSecondaryState = eXBL_InMethod;
         return NS_OK;
       }
       else if (mState == eXBL_InBindings &&
                localName == nsGkAtoms::bindings) {
         mState = eXBL_InDocument;
       }
       nsresult rv = nsXMLContentSink::HandleEndElement(aName);
       if (NS_FAILED(rv))
         return rv;
       if (mState == eXBL_InBinding && localName == nsGkAtoms::binding) {
         mState = eXBL_InBindings;
         if (mBinding) {  // See comment in HandleStartElement()
           mBinding->Initialize();
           mBinding = nullptr; // Clear our current binding ref.
         }
       }
       return NS_OK;
     }
   }
   return nsXMLContentSink::HandleEndElement(aName);
 }
 NS_IMETHODIMP
 nsXBLContentSink::HandleCDataSection(const char16_t *aData,
                                      uint32_t aLength)
 {
   if (mState == eXBL_InHandlers || mState == eXBL_InImplementation)
     return AddText(aData, aLength);
   return nsXMLContentSink::HandleCDataSection(aData, aLength);
 }
 #define ENSURE_XBL_STATE(_cond)                                                       \
   PR_BEGIN_MACRO                                                                      \
     if (!(_cond)) { ReportUnexpectedElement(aTagName, aLineNumber); return true; } \
   PR_END_MACRO
 bool
 nsXBLContentSink::OnOpenContainer(const char16_t **aAtts,
                                   uint32_t aAttsCount,
                                   int32_t aNameSpaceID,
                                   nsIAtom* aTagName,
                                   uint32_t aLineNumber)
 {
   if (mState == eXBL_Error) {
     return true;
   }
   if (aNameSpaceID != kNameSpaceID_XBL) {
     // Construct non-XBL nodes
     return true;
   }
   bool ret = true;
   if (aTagName == nsGkAtoms::bindings) {
     ENSURE_XBL_STATE(mState == eXBL_InDocument);
     NS_ASSERTION(mDocument, "Must have a document!");
     nsRefPtr<nsXBLDocumentInfo> info = new nsXBLDocumentInfo(mDocument);
     // We keep a weak ref. We're creating a cycle between doc/binding manager/doc info.
     mDocInfo = info;
     if (!mDocInfo) {
       mState = eXBL_Error;
       return true;
     }
     mDocument->BindingManager()->PutXBLDocumentInfo(mDocInfo);
     nsIURI *uri = mDocument->GetDocumentURI();
     bool isChrome = false;
     bool isRes = false;
     uri->SchemeIs("chrome", &isChrome);
     uri->SchemeIs("resource", &isRes);
     mIsChromeOrResource = isChrome || isRes;
     mState = eXBL_InBindings;
   }
   else if (aTagName == nsGkAtoms::binding) {
     ENSURE_XBL_STATE(mState == eXBL_InBindings);
     mState = eXBL_InBinding;
   }
   else if (aTagName == nsGkAtoms::handlers) {
     ENSURE_XBL_STATE(mState == eXBL_InBinding && mBinding);
     mState = eXBL_InHandlers;
     ret = false;
   }
   else if (aTagName == nsGkAtoms::handler) {
     ENSURE_XBL_STATE(mState == eXBL_InHandlers);
     mSecondaryState = eXBL_InHandler;
     ConstructHandler(aAtts, aLineNumber);
     ret = false;
   }
   else if (aTagName == nsGkAtoms::resources) {
     ENSURE_XBL_STATE(mState == eXBL_InBinding && mBinding);
     mState = eXBL_InResources;
     // Note that this mState will cause us to return false, so no need
     // to set ret to false.
   }
   else if (aTagName == nsGkAtoms::stylesheet || aTagName == nsGkAtoms::image) {
     ENSURE_XBL_STATE(mState == eXBL_InResources);
     NS_ASSERTION(mBinding, "Must have binding here");
     ConstructResource(aAtts, aTagName);
   }
   else if (aTagName == nsGkAtoms::implementation) {
     ENSURE_XBL_STATE(mState == eXBL_InBinding && mBinding);
     mState = eXBL_InImplementation;
     ConstructImplementation(aAtts);
     // Note that this mState will cause us to return false, so no need
     // to set ret to false.
   }
   else if (aTagName == nsGkAtoms::constructor) {
     ENSURE_XBL_STATE(mState == eXBL_InImplementation &&
                      mSecondaryState == eXBL_None);
     NS_ASSERTION(mBinding, "Must have binding here");
     mSecondaryState = eXBL_InConstructor;
     nsAutoString name;
     if (!mCurrentBindingID.IsEmpty()) {
       name.Assign(mCurrentBindingID);
       name.AppendLiteral("_XBL_Constructor");
     } else {
       name.AppendLiteral("XBL_Constructor");
     }
     nsXBLProtoImplAnonymousMethod* newMethod =
       new nsXBLProtoImplAnonymousMethod(name.get());
     if (newMethod) {
       newMethod->SetLineNumber(aLineNumber);
       mBinding->SetConstructor(newMethod);
       AddMember(newMethod);
     }
   }
   else if (aTagName == nsGkAtoms::destructor) {
     ENSURE_XBL_STATE(mState == eXBL_InImplementation &&
                      mSecondaryState == eXBL_None);
     NS_ASSERTION(mBinding, "Must have binding here");
     mSecondaryState = eXBL_InDestructor;
     nsAutoString name;
     if (!mCurrentBindingID.IsEmpty()) {
       name.Assign(mCurrentBindingID);
       name.AppendLiteral("_XBL_Destructor");
     } else {
       name.AppendLiteral("XBL_Destructor");
     }
     nsXBLProtoImplAnonymousMethod* newMethod =
       new nsXBLProtoImplAnonymousMethod(name.get());
     if (newMethod) {
       newMethod->SetLineNumber(aLineNumber);
       mBinding->SetDestructor(newMethod);
       AddMember(newMethod);
     }
   }
   else if (aTagName == nsGkAtoms::field) {
     ENSURE_XBL_STATE(mState == eXBL_InImplementation &&
                      mSecondaryState == eXBL_None);
     NS_ASSERTION(mBinding, "Must have binding here");
     mSecondaryState = eXBL_InField;
     ConstructField(aAtts, aLineNumber);
   }
   else if (aTagName == nsGkAtoms::property) {
     ENSURE_XBL_STATE(mState == eXBL_InImplementation &&
                      mSecondaryState == eXBL_None);
     NS_ASSERTION(mBinding, "Must have binding here");
     mSecondaryState = eXBL_InProperty;
     ConstructProperty(aAtts, aLineNumber);
   }
   else if (aTagName == nsGkAtoms::getter) {
     ENSURE_XBL_STATE(mSecondaryState == eXBL_InProperty && mProperty);
     NS_ASSERTION(mState == eXBL_InImplementation, "Unexpected state");
     mProperty->SetGetterLineNumber(aLineNumber);
     mSecondaryState = eXBL_InGetter;
   }
   else if (aTagName == nsGkAtoms::setter) {
     ENSURE_XBL_STATE(mSecondaryState == eXBL_InProperty && mProperty);
     NS_ASSERTION(mState == eXBL_InImplementation, "Unexpected state");
     mProperty->SetSetterLineNumber(aLineNumber);
     mSecondaryState = eXBL_InSetter;
   }
   else if (aTagName == nsGkAtoms::method) {
     ENSURE_XBL_STATE(mState == eXBL_InImplementation &&
                      mSecondaryState == eXBL_None);
     NS_ASSERTION(mBinding, "Must have binding here");
     mSecondaryState = eXBL_InMethod;
     ConstructMethod(aAtts);
   }
   else if (aTagName == nsGkAtoms::parameter) {
     ENSURE_XBL_STATE(mSecondaryState == eXBL_InMethod && mMethod);
     NS_ASSERTION(mState == eXBL_InImplementation, "Unexpected state");
     ConstructParameter(aAtts);
   }
   else if (aTagName == nsGkAtoms::body) {
     ENSURE_XBL_STATE(mSecondaryState == eXBL_InMethod && mMethod);
     NS_ASSERTION(mState == eXBL_InImplementation, "Unexpected state");
     // stash away the line number
     mMethod->SetLineNumber(aLineNumber);
     mSecondaryState = eXBL_InBody;
   }
   return ret && mState != eXBL_InResources && mState != eXBL_InImplementation;
 }
 #undef ENSURE_XBL_STATE
 nsresult
 nsXBLContentSink::ConstructBinding(uint32_t aLineNumber)
 {
   nsCOMPtr<nsIContent> binding = GetCurrentContent();
   binding->GetAttr(kNameSpaceID_None, nsGkAtoms::id, mCurrentBindingID);
   NS_ConvertUTF16toUTF8 cid(mCurrentBindingID);
   nsresult rv = NS_OK;
   // Don't create a binding with no id. nsXBLPrototypeBinding::Read also
   // performs this check.
   if (!cid.IsEmpty()) {
     mBinding = new nsXBLPrototypeBinding();
     if (!mBinding)
       return NS_ERROR_OUT_OF_MEMORY;
     rv = mBinding->Init(cid, mDocInfo, binding, !mFoundFirstBinding);
     if (NS_SUCCEEDED(rv) &&
         NS_SUCCEEDED(mDocInfo->SetPrototypeBinding(cid, mBinding))) {
       if (!mFoundFirstBinding) {
         mFoundFirstBinding = true;
         mDocInfo->SetFirstPrototypeBinding(mBinding);
       }
       binding->UnsetAttr(kNameSpaceID_None, nsGkAtoms::id, false);
     } else {
       delete mBinding;
       mBinding = nullptr;
     }
   } else {
     nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
                                     NS_LITERAL_CSTRING("XBL Content Sink"), nullptr,
                                     nsContentUtils::eXBL_PROPERTIES,
                                     "MissingIdAttr", nullptr, 0,
                                     mDocumentURI,
                                     EmptyString(),
                                     aLineNumber);
   }
   return rv;
 }
 static bool
 FindValue(const char16_t **aAtts, nsIAtom *aAtom, const char16_t **aResult)
 {
   nsCOMPtr<nsIAtom> prefix, localName;
   for (; *aAtts; aAtts += 2) {
     int32_t nameSpaceID;
     nsContentUtils::SplitExpatName(aAtts[0], getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     // Is this attribute one of the ones we care about?
     if (nameSpaceID == kNameSpaceID_None && localName == aAtom) {
       *aResult = aAtts[1];
       return true;
     }
   }
   return false;
 }
 void
 nsXBLContentSink::ConstructHandler(const char16_t **aAtts, uint32_t aLineNumber)
 {
   const char16_t* event          = nullptr;
   const char16_t* modifiers      = nullptr;
   const char16_t* button         = nullptr;
   const char16_t* clickcount     = nullptr;
   const char16_t* keycode        = nullptr;
   const char16_t* charcode       = nullptr;
   const char16_t* phase          = nullptr;
   const char16_t* command        = nullptr;
   const char16_t* action         = nullptr;
   const char16_t* group          = nullptr;
   const char16_t* preventdefault = nullptr;
   const char16_t* allowuntrusted = nullptr;
   nsCOMPtr<nsIAtom> prefix, localName;
   for (; *aAtts; aAtts += 2) {
     int32_t nameSpaceID;
     nsContentUtils::SplitExpatName(aAtts[0], getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     if (nameSpaceID != kNameSpaceID_None) {
       continue;
     }
     // Is this attribute one of the ones we care about?
     if (localName == nsGkAtoms::event)
       event = aAtts[1];
     else if (localName == nsGkAtoms::modifiers)
       modifiers = aAtts[1];
     else if (localName == nsGkAtoms::button)
       button = aAtts[1];
     else if (localName == nsGkAtoms::clickcount)
       clickcount = aAtts[1];
     else if (localName == nsGkAtoms::keycode)
       keycode = aAtts[1];
     else if (localName == nsGkAtoms::key || localName == nsGkAtoms::charcode)
       charcode = aAtts[1];
     else if (localName == nsGkAtoms::phase)
       phase = aAtts[1];
     else if (localName == nsGkAtoms::command)
       command = aAtts[1];
     else if (localName == nsGkAtoms::action)
       action = aAtts[1];
     else if (localName == nsGkAtoms::group)
       group = aAtts[1];
     else if (localName == nsGkAtoms::preventdefault)
       preventdefault = aAtts[1];
     else if (localName == nsGkAtoms::allowuntrusted)
       allowuntrusted = aAtts[1];
   }
   if (command && !mIsChromeOrResource) {
     // Make sure the XBL doc is chrome or resource if we have a command
     // shorthand syntax.
     mState = eXBL_Error;
     nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
                                     NS_LITERAL_CSTRING("XBL Content Sink"),
                                     mDocument,
                                     nsContentUtils::eXBL_PROPERTIES,
                                     "CommandNotInChrome", nullptr, 0,
                                     nullptr,
                                     EmptyString() /* source line */,
                                     aLineNumber);
     return; // Don't even make this handler.
   }
   // All of our pointers are now filled in. Construct our handler with all of
   // these parameters.
   nsXBLPrototypeHandler* newHandler;
   newHandler = new nsXBLPrototypeHandler(event, phase, action, command,
                                          keycode, charcode, modifiers, button,
                                          clickcount, group, preventdefault,
                                          allowuntrusted, mBinding, aLineNumber);
   if (newHandler) {
     // Add this handler to our chain of handlers.
     if (mHandler) {
       // Already have a chain. Just append to the end.
       mHandler->SetNextHandler(newHandler);
     }
     else {
       // We're the first handler in the chain.
       mBinding->SetPrototypeHandlers(newHandler);
     }
     // Adjust our mHandler pointer to point to the new last handler in the
     // chain.
     mHandler = newHandler;
   } else {
     mState = eXBL_Error;
   }
 }
 void
 nsXBLContentSink::ConstructResource(const char16_t **aAtts,
                                     nsIAtom* aResourceType)
 {
   if (!mBinding)
     return;
   const char16_t* src = nullptr;
   if (FindValue(aAtts, nsGkAtoms::src, &src)) {
     mBinding->AddResource(aResourceType, nsDependentString(src));
   }
 }
 void
 nsXBLContentSink::ConstructImplementation(const char16_t **aAtts)
 {
   mImplementation = nullptr;
   mImplMember = nullptr;
   mImplField = nullptr;
   if (!mBinding)
     return;
   const char16_t* name = nullptr;
   nsCOMPtr<nsIAtom> prefix, localName;
   for (; *aAtts; aAtts += 2) {
     int32_t nameSpaceID;
     nsContentUtils::SplitExpatName(aAtts[0], getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     if (nameSpaceID != kNameSpaceID_None) {
       continue;
     }
     // Is this attribute one of the ones we care about?
     if (localName == nsGkAtoms::name) {
       name = aAtts[1];
     }
     else if (localName == nsGkAtoms::implements) {
       // Only allow implementation of interfaces via XBL if the principal of
       // our XBL document is the system principal.
       if (nsContentUtils::IsSystemPrincipal(mDocument->NodePrincipal())) {
         mBinding->ConstructInterfaceTable(nsDependentString(aAtts[1]));
       }
     }
   }
   NS_NewXBLProtoImpl(mBinding, name, &mImplementation);
 }
 void
 nsXBLContentSink::ConstructField(const char16_t **aAtts, uint32_t aLineNumber)
 {
   const char16_t* name     = nullptr;
   const char16_t* readonly = nullptr;
   nsCOMPtr<nsIAtom> prefix, localName;
   for (; *aAtts; aAtts += 2) {
     int32_t nameSpaceID;
     nsContentUtils::SplitExpatName(aAtts[0], getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     if (nameSpaceID != kNameSpaceID_None) {
       continue;
     }
     // Is this attribute one of the ones we care about?
     if (localName == nsGkAtoms::name) {
       name = aAtts[1];
     }
     else if (localName == nsGkAtoms::readonly) {
       readonly = aAtts[1];
     }
   }
   if (name) {
     // All of our pointers are now filled in. Construct our field with all of
     // these parameters.
     mField = new nsXBLProtoImplField(name, readonly);
     if (mField) {
       mField->SetLineNumber(aLineNumber);
       AddField(mField);
     }
   }
 }
 void
 nsXBLContentSink::ConstructProperty(const char16_t **aAtts, uint32_t aLineNumber)
 {
   const char16_t* name     = nullptr;
   const char16_t* readonly = nullptr;
   const char16_t* onget    = nullptr;
   const char16_t* onset    = nullptr;
   bool exposeToUntrustedContent = false;
   nsCOMPtr<nsIAtom> prefix, localName;
   for (; *aAtts; aAtts += 2) {
     int32_t nameSpaceID;
     nsContentUtils::SplitExpatName(aAtts[0], getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     if (nameSpaceID != kNameSpaceID_None) {
       continue;
     }
     // Is this attribute one of the ones we care about?
     if (localName == nsGkAtoms::name) {
       name = aAtts[1];
     }
     else if (localName == nsGkAtoms::readonly) {
       readonly = aAtts[1];
     }
     else if (localName == nsGkAtoms::onget) {
       onget = aAtts[1];
     }
     else if (localName == nsGkAtoms::onset) {
       onset = aAtts[1];
     }
     else if (localName == nsGkAtoms::exposeToUntrustedContent &&
              nsDependentString(aAtts[1]).EqualsLiteral("true"))
     {
       exposeToUntrustedContent = true;
     }
   }
   if (name) {
     // All of our pointers are now filled in. Construct our property with all of
     // these parameters.
     mProperty = new nsXBLProtoImplProperty(name, onget, onset, readonly, aLineNumber);
     if (exposeToUntrustedContent) {
       mProperty->SetExposeToUntrustedContent(true);
     }
     AddMember(mProperty);
   }
 }
 void
 nsXBLContentSink::ConstructMethod(const char16_t **aAtts)
 {
   mMethod = nullptr;
   const char16_t* name = nullptr;
   const char16_t* expose = nullptr;
   if (FindValue(aAtts, nsGkAtoms::name, &name)) {
     mMethod = new nsXBLProtoImplMethod(name);
     if (FindValue(aAtts, nsGkAtoms::exposeToUntrustedContent, &expose) &&
         nsDependentString(expose).EqualsLiteral("true"))
     {
       mMethod->SetExposeToUntrustedContent(true);
     }
   }
   if (mMethod) {
     AddMember(mMethod);
   }
 }
 void
 nsXBLContentSink::ConstructParameter(const char16_t **aAtts)
 {
   if (!mMethod)
     return;
   const char16_t* name = nullptr;
   if (FindValue(aAtts, nsGkAtoms::name, &name)) {
     mMethod->AddParameter(nsDependentString(name));
   }
 }
 nsresult
 nsXBLContentSink::CreateElement(const char16_t** aAtts, uint32_t aAttsCount,
                                 nsINodeInfo* aNodeInfo, uint32_t aLineNumber,
                                 nsIContent** aResult, bool* aAppendContent,
                                 FromParser aFromParser)
 {
 #ifdef MOZ_XUL
   if (!aNodeInfo->NamespaceEquals(kNameSpaceID_XUL)) {
 #endif
     return nsXMLContentSink::CreateElement(aAtts, aAttsCount, aNodeInfo,
                                            aLineNumber, aResult,
                                            aAppendContent, aFromParser);
 #ifdef MOZ_XUL
   }
   // Note that this needs to match the code in nsXBLPrototypeBinding::ReadContentNode.
   *aAppendContent = true;
   nsRefPtr<nsXULPrototypeElement> prototype = new nsXULPrototypeElement();
   if (!prototype)
     return NS_ERROR_OUT_OF_MEMORY;
   prototype->mNodeInfo = aNodeInfo;
   AddAttributesToXULPrototype(aAtts, aAttsCount, prototype);
   Element* result;
   nsresult rv = nsXULElement::Create(prototype, mDocument, false, false, &result);
   *aResult = result;
   return rv;
 #endif
 }
 nsresult
 nsXBLContentSink::AddAttributes(const char16_t** aAtts,
                                 nsIContent* aContent)
 {
   if (aContent->IsXUL())
     return NS_OK; // Nothing to do, since the proto already has the attrs.
   return nsXMLContentSink::AddAttributes(aAtts, aContent);
 }
 #ifdef MOZ_XUL
 nsresult
 nsXBLContentSink::AddAttributesToXULPrototype(const char16_t **aAtts,
                                               uint32_t aAttsCount,
                                               nsXULPrototypeElement* aElement)
 {
   // Add tag attributes to the element
   nsresult rv;
   // Create storage for the attributes
   nsXULPrototypeAttribute* attrs = nullptr;
   if (aAttsCount > 0) {
     attrs = new nsXULPrototypeAttribute[aAttsCount];
     if (!attrs)
       return NS_ERROR_OUT_OF_MEMORY;
   }
   aElement->mAttributes    = attrs;
   aElement->mNumAttributes = aAttsCount;
   // Copy the attributes into the prototype
   nsCOMPtr<nsIAtom> prefix, localName;
   uint32_t i;
   for (i = 0; i < aAttsCount; ++i) {
     int32_t nameSpaceID;
     nsContentUtils::SplitExpatName(aAtts[i * 2], getter_AddRefs(prefix),
                                    getter_AddRefs(localName), &nameSpaceID);
     if (nameSpaceID == kNameSpaceID_None) {
       attrs[i].mName.SetTo(localName);
     }
     else {
       nsCOMPtr<nsINodeInfo> ni;
       ni = mNodeInfoManager->GetNodeInfo(localName, prefix, nameSpaceID,
                                          nsIDOMNode::ATTRIBUTE_NODE);
       attrs[i].mName.SetTo(ni);
     }
     rv = aElement->SetAttrAt(i, nsDependentString(aAtts[i * 2 + 1]),
                              mDocumentURI);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   return NS_OK;
 }
 #endif

The Tor Browser / annotate

dom/xbl/nsXBLContentSink.cpp@b8a032363ba2 (annotated)

dom/xbl/nsXBLContentSink.cpp