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Diffstat (limited to '')
| -rw-r--r-- | dom/xml/nsXMLFragmentContentSink.cpp | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/dom/xml/nsXMLFragmentContentSink.cpp b/dom/xml/nsXMLFragmentContentSink.cpp new file mode 100644 index 0000000000..ddf96793e4 --- /dev/null +++ b/dom/xml/nsXMLFragmentContentSink.cpp @@ -0,0 +1,372 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "nsCOMPtr.h" +#include "nsXMLContentSink.h" +#include "nsIFragmentContentSink.h" +#include "nsIXMLContentSink.h" +#include "nsContentSink.h" +#include "nsIExpatSink.h" +#include "nsIDTD.h" +#include "mozilla/dom/Document.h" +#include "nsIContent.h" +#include "nsGkAtoms.h" +#include "mozilla/dom/NodeInfo.h" +#include "nsContentCreatorFunctions.h" +#include "nsError.h" +#include "nsIDocShell.h" +#include "nsIScriptError.h" +#include "nsTHashtable.h" +#include "nsHashKeys.h" +#include "nsTArray.h" +#include "nsCycleCollectionParticipant.h" +#include "mozilla/css/Loader.h" +#include "mozilla/dom/DocumentFragment.h" +#include "mozilla/dom/ProcessingInstruction.h" +#include "mozilla/dom/ScriptLoader.h" + +using namespace mozilla::dom; + +class nsXMLFragmentContentSink : public nsXMLContentSink, + public nsIFragmentContentSink { + public: + nsXMLFragmentContentSink(); + + // nsISupports + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsXMLFragmentContentSink, + nsXMLContentSink) + + // nsIExpatSink + NS_IMETHOD HandleDoctypeDecl(const nsAString& aSubset, const nsAString& aName, + const nsAString& aSystemId, + const nsAString& aPublicId, + nsISupports* aCatalogData) override; + NS_IMETHOD HandleProcessingInstruction(const char16_t* aTarget, + const char16_t* aData) override; + NS_IMETHOD HandleXMLDeclaration(const char16_t* aVersion, + const char16_t* aEncoding, + int32_t aStandalone) override; + NS_IMETHOD ReportError(const char16_t* aErrorText, + const char16_t* aSourceText, nsIScriptError* aError, + bool* aRetval) override; + + // nsIContentSink + NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) override; + NS_IMETHOD DidBuildModel(bool aTerminated) override; + virtual void SetDocumentCharset(NotNull<const Encoding*> aEncoding) override; + virtual nsISupports* GetTarget() override; + NS_IMETHOD DidProcessATokenImpl(); + + // nsIXMLContentSink + + // nsIFragmentContentSink + NS_IMETHOD FinishFragmentParsing(DocumentFragment** aFragment) override; + NS_IMETHOD SetTargetDocument(Document* aDocument) override; + NS_IMETHOD WillBuildContent() override; + NS_IMETHOD DidBuildContent() override; + NS_IMETHOD IgnoreFirstContainer() override; + NS_IMETHOD SetPreventScriptExecution(bool aPreventScriptExecution) override; + + protected: + virtual ~nsXMLFragmentContentSink(); + + virtual bool SetDocElement(int32_t aNameSpaceID, nsAtom* aTagName, + nsIContent* aContent) override; + virtual nsresult CreateElement(const char16_t** aAtts, uint32_t aAttsCount, + mozilla::dom::NodeInfo* aNodeInfo, + uint32_t aLineNumber, uint32_t aColumnNumber, + nsIContent** aResult, bool* aAppendContent, + mozilla::dom::FromParser aFromParser) override; + virtual nsresult CloseElement(nsIContent* aContent) override; + + virtual void MaybeStartLayout(bool aIgnorePendingSheets) override; + + // nsContentSink overrides + virtual nsresult ProcessStyleLinkFromHeader( + const nsAString& aHref, bool aAlternate, const nsAString& aTitle, + const nsAString& aIntegrity, const nsAString& aType, + const nsAString& aMedia, const nsAString& aReferrerPolicy) override; + + // nsXMLContentSink overrides + virtual nsresult MaybeProcessXSLTLink( + ProcessingInstruction* aProcessingInstruction, const nsAString& aHref, + bool aAlternate, const nsAString& aTitle, const nsAString& aType, + const nsAString& aMedia, const nsAString& aReferrerPolicy, + bool* aWasXSLT = nullptr) override; + + nsCOMPtr<Document> mTargetDocument; + // the fragment + RefPtr<DocumentFragment> mRoot; + bool mParseError; +}; + +static nsresult NewXMLFragmentContentSinkHelper( + nsIFragmentContentSink** aResult) { + nsXMLFragmentContentSink* it = new nsXMLFragmentContentSink(); + + NS_ADDREF(*aResult = it); + + return NS_OK; +} + +nsresult NS_NewXMLFragmentContentSink(nsIFragmentContentSink** aResult) { + return NewXMLFragmentContentSinkHelper(aResult); +} + +nsXMLFragmentContentSink::nsXMLFragmentContentSink() : mParseError(false) { + mRunsToCompletion = true; +} + +nsXMLFragmentContentSink::~nsXMLFragmentContentSink() = default; + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXMLFragmentContentSink) + NS_INTERFACE_MAP_ENTRY(nsIFragmentContentSink) +NS_INTERFACE_MAP_END_INHERITING(nsXMLContentSink) + +NS_IMPL_ADDREF_INHERITED(nsXMLFragmentContentSink, nsXMLContentSink) +NS_IMPL_RELEASE_INHERITED(nsXMLFragmentContentSink, nsXMLContentSink) + +NS_IMPL_CYCLE_COLLECTION_INHERITED(nsXMLFragmentContentSink, nsXMLContentSink, + mTargetDocument, mRoot) + +NS_IMETHODIMP +nsXMLFragmentContentSink::WillBuildModel(nsDTDMode aDTDMode) { + if (mRoot) { + return NS_OK; + } + + mState = eXMLContentSinkState_InDocumentElement; + + NS_ASSERTION(mTargetDocument, "Need a document!"); + + mRoot = new (mNodeInfoManager) DocumentFragment(mNodeInfoManager); + + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::DidBuildModel(bool aTerminated) { + // Drop our reference to the parser to get rid of a circular + // reference. + mParser = nullptr; + + return NS_OK; +} + +void nsXMLFragmentContentSink::SetDocumentCharset( + NotNull<const Encoding*> aEncoding) { + MOZ_ASSERT_UNREACHABLE("fragments shouldn't set charset"); +} + +nsISupports* nsXMLFragmentContentSink::GetTarget() { + return ToSupports(mTargetDocument); +} + +//////////////////////////////////////////////////////////////////////// + +bool nsXMLFragmentContentSink::SetDocElement(int32_t aNameSpaceID, + nsAtom* aTagName, + nsIContent* aContent) { + // this is a fragment, not a document + return false; +} + +nsresult nsXMLFragmentContentSink::CreateElement( + const char16_t** aAtts, uint32_t aAttsCount, + mozilla::dom::NodeInfo* aNodeInfo, uint32_t aLineNumber, + uint32_t aColumnNumber, nsIContent** aResult, bool* aAppendContent, + FromParser /*aFromParser*/) { + // Claim to not be coming from parser, since we don't do any of the + // fancy CloseElement stuff. + nsresult rv = nsXMLContentSink::CreateElement( + aAtts, aAttsCount, aNodeInfo, aLineNumber, aColumnNumber, aResult, + aAppendContent, NOT_FROM_PARSER); + + // When we aren't grabbing all of the content we, never open a doc + // element, we run into trouble on the first element, so we don't append, + // and simply push this onto the content stack. + if (mContentStack.Length() == 0) { + *aAppendContent = false; + } + + return rv; +} + +nsresult nsXMLFragmentContentSink::CloseElement(nsIContent* aContent) { + // don't do fancy stuff in nsXMLContentSink + if (mPreventScriptExecution && (aContent->IsHTMLElement(nsGkAtoms::script) || + aContent->IsSVGElement(nsGkAtoms::script))) { + nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(aContent); + if (sele) { + sele->PreventExecution(); + } else { + NS_ASSERTION(nsNameSpaceManager::GetInstance()->mSVGDisabled, + "Script did QI correctly, but wasn't a disabled SVG!"); + } + } + return NS_OK; +} + +void nsXMLFragmentContentSink::MaybeStartLayout(bool aIgnorePendingSheets) {} + +//////////////////////////////////////////////////////////////////////// + +NS_IMETHODIMP +nsXMLFragmentContentSink::HandleDoctypeDecl(const nsAString& aSubset, + const nsAString& aName, + const nsAString& aSystemId, + const nsAString& aPublicId, + nsISupports* aCatalogData) { + MOZ_ASSERT_UNREACHABLE("fragments shouldn't have doctype declarations"); + + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::HandleProcessingInstruction(const char16_t* aTarget, + const char16_t* aData) { + FlushText(); + + const nsDependentString target(aTarget); + const nsDependentString data(aData); + + RefPtr<ProcessingInstruction> node = + NS_NewXMLProcessingInstruction(mNodeInfoManager, target, data); + + // no special processing here. that should happen when the fragment moves + // into the document + return AddContentAsLeaf(node); +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::HandleXMLDeclaration(const char16_t* aVersion, + const char16_t* aEncoding, + int32_t aStandalone) { + MOZ_ASSERT_UNREACHABLE("fragments shouldn't have XML declarations"); + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::ReportError(const char16_t* aErrorText, + const char16_t* aSourceText, + nsIScriptError* aError, bool* _retval) { + MOZ_ASSERT(aError && aSourceText && aErrorText, "Check arguments!!!"); + + // The expat driver should report the error. + *_retval = true; + + mParseError = true; + +#ifdef DEBUG + // Report the error to stderr. + fprintf(stderr, "\n%s\n%s\n\n", NS_LossyConvertUTF16toASCII(aErrorText).get(), + NS_LossyConvertUTF16toASCII(aSourceText).get()); +#endif + + // The following code is similar to the cleanup in + // nsXMLContentSink::ReportError() + mState = eXMLContentSinkState_InProlog; + + // Clear the current content + while (mRoot->GetLastChild()) { + mRoot->GetLastChild()->Remove(); + } + + // Clear any buffered-up text we have. It's enough to set the length to 0. + // The buffer itself is allocated when we're created and deleted in our + // destructor, so don't mess with it. + mTextLength = 0; + + return NS_OK; +} + +nsresult nsXMLFragmentContentSink::ProcessStyleLinkFromHeader( + const nsAString& aHref, bool aAlternate, const nsAString& aTitle, + const nsAString& aIntegrity, const nsAString& aType, + const nsAString& aMedia, const nsAString& aReferrerPolicy) + +{ + MOZ_ASSERT_UNREACHABLE("Shouldn't have headers for a fragment sink"); + return NS_OK; +} + +nsresult nsXMLFragmentContentSink::MaybeProcessXSLTLink( + ProcessingInstruction* aProcessingInstruction, const nsAString& aHref, + bool aAlternate, const nsAString& aTitle, const nsAString& aType, + const nsAString& aMedia, const nsAString& aReferrerPolicy, bool* aWasXSLT) { + MOZ_ASSERT(!aWasXSLT, "Our one caller doesn't care about whether we're XSLT"); + return NS_OK; +} + +//////////////////////////////////////////////////////////////////////// + +NS_IMETHODIMP +nsXMLFragmentContentSink::FinishFragmentParsing(DocumentFragment** aFragment) { + mTargetDocument = nullptr; + mNodeInfoManager = nullptr; + mScriptLoader = nullptr; + mCSSLoader = nullptr; + mContentStack.Clear(); + mDocumentURI = nullptr; + mDocShell = nullptr; + mDocElement = nullptr; + mCurrentHead = nullptr; + if (mParseError) { + // XXX PARSE_ERR from DOM3 Load and Save would be more appropriate + mRoot = nullptr; + mParseError = false; + *aFragment = nullptr; + return NS_ERROR_DOM_SYNTAX_ERR; + } + + mRoot.forget(aFragment); + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::SetTargetDocument(Document* aTargetDocument) { + NS_ENSURE_ARG_POINTER(aTargetDocument); + + mTargetDocument = aTargetDocument; + mNodeInfoManager = aTargetDocument->NodeInfoManager(); + + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::WillBuildContent() { + PushContent(mRoot); + + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::DidBuildContent() { + // Note: we need to FlushText() here because if we don't, we might not get + // an end element to do it for us, so make sure. + if (!mParseError) { + FlushText(); + } + PopContent(); + + return NS_OK; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::DidProcessATokenImpl() { return NS_OK; } + +NS_IMETHODIMP +nsXMLFragmentContentSink::IgnoreFirstContainer() { + MOZ_ASSERT_UNREACHABLE("XML isn't as broken as HTML"); + return NS_ERROR_FAILURE; +} + +NS_IMETHODIMP +nsXMLFragmentContentSink::SetPreventScriptExecution(bool aPrevent) { + mPreventScriptExecution = aPrevent; + return NS_OK; +} |