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Diffstat (limited to 'dom/xml/nsXMLContentSink.h')
| -rw-r--r-- | dom/xml/nsXMLContentSink.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/dom/xml/nsXMLContentSink.h b/dom/xml/nsXMLContentSink.h new file mode 100644 index 000000000..5e9880b08 --- /dev/null +++ b/dom/xml/nsXMLContentSink.h @@ -0,0 +1,204 @@ +/* -*- 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/. */ + +#ifndef nsXMLContentSink_h__ +#define nsXMLContentSink_h__ + +#include "mozilla/Attributes.h" +#include "nsContentSink.h" +#include "nsIXMLContentSink.h" +#include "nsIExpatSink.h" +#include "nsIDocumentTransformer.h" +#include "nsTArray.h" +#include "nsCOMPtr.h" +#include "nsCRT.h" +#include "nsCycleCollectionParticipant.h" +#include "nsIDTD.h" +#include "mozilla/dom/FromParser.h" + +class nsIDocument; +class nsIURI; +class nsIContent; +class nsIParser; + +namespace mozilla { +namespace dom { +class NodeInfo; +} // namespace dom +} // namespace mozilla + +typedef enum { + eXMLContentSinkState_InProlog, + eXMLContentSinkState_InDocumentElement, + eXMLContentSinkState_InEpilog +} XMLContentSinkState; + +struct StackNode { + nsCOMPtr<nsIContent> mContent; + uint32_t mNumFlushed; +}; + +class nsXMLContentSink : public nsContentSink, + public nsIXMLContentSink, + public nsITransformObserver, + public nsIExpatSink +{ +public: + nsXMLContentSink(); + + nsresult Init(nsIDocument* aDoc, + nsIURI* aURL, + nsISupports* aContainer, + nsIChannel* aChannel); + + // nsISupports + NS_DECL_ISUPPORTS_INHERITED + + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_NO_UNLINK(nsXMLContentSink, + nsContentSink) + + NS_DECL_NSIEXPATSINK + + // nsIContentSink + NS_IMETHOD WillParse(void) override; + NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) override; + NS_IMETHOD DidBuildModel(bool aTerminated) override; + NS_IMETHOD WillInterrupt(void) override; + NS_IMETHOD WillResume(void) override; + NS_IMETHOD SetParser(nsParserBase* aParser) override; + virtual void FlushPendingNotifications(mozFlushType aType) override; + NS_IMETHOD SetDocumentCharset(nsACString& aCharset) override; + virtual nsISupports *GetTarget() override; + virtual bool IsScriptExecuting() override; + virtual void ContinueInterruptedParsingAsync() override; + + // nsITransformObserver + NS_IMETHOD OnDocumentCreated(nsIDocument *aResultDocument) override; + NS_IMETHOD OnTransformDone(nsresult aResult, nsIDocument *aResultDocument) override; + + // nsICSSLoaderObserver + NS_IMETHOD StyleSheetLoaded(mozilla::StyleSheet* aSheet, + bool aWasAlternate, + nsresult aStatus) override; + static bool ParsePIData(const nsString &aData, nsString &aHref, + nsString &aTitle, nsString &aMedia, + bool &aIsAlternate); + +protected: + virtual ~nsXMLContentSink(); + + nsIParser* GetParser(); + + void ContinueInterruptedParsingIfEnabled(); + + // Start layout. If aIgnorePendingSheets is true, this will happen even if + // we still have stylesheet loads pending. Otherwise, we'll wait until the + // stylesheets are all done loading. + virtual void MaybeStartLayout(bool aIgnorePendingSheets); + + virtual nsresult AddAttributes(const char16_t** aNode, nsIContent* aContent); + nsresult AddText(const char16_t* aString, int32_t aLength); + + virtual bool OnOpenContainer(const char16_t **aAtts, + uint32_t aAttsCount, + int32_t aNameSpaceID, + nsIAtom* aTagName, + uint32_t aLineNumber) { return true; } + // Set the given content as the root element for the created document + // don't set if root element was already set. + // return TRUE if this call set the root element + virtual bool SetDocElement(int32_t aNameSpaceID, + nsIAtom *aTagName, + nsIContent *aContent); + virtual bool NotifyForDocElement() { return true; } + virtual nsresult CreateElement(const char16_t** aAtts, uint32_t aAttsCount, + mozilla::dom::NodeInfo* aNodeInfo, uint32_t aLineNumber, + nsIContent** aResult, bool* aAppendContent, + mozilla::dom::FromParser aFromParser); + + // aParent is allowed to be null here if this is the root content + // being closed + virtual nsresult CloseElement(nsIContent* aContent); + + virtual nsresult FlushText(bool aReleaseTextNode = true); + + nsresult AddContentAsLeaf(nsIContent *aContent); + + nsIContent* GetCurrentContent(); + StackNode* GetCurrentStackNode(); + nsresult PushContent(nsIContent *aContent); + void PopContent(); + bool HaveNotifiedForCurrentContent() const; + + nsresult FlushTags() override; + + void UpdateChildCounts() override; + + void DidAddContent() + { + if (!mXSLTProcessor && IsTimeToNotify()) { + FlushTags(); + } + } + + // nsContentSink override + virtual nsresult ProcessStyleLink(nsIContent* aElement, + const nsSubstring& aHref, + bool aAlternate, + const nsSubstring& aTitle, + const nsSubstring& aType, + const nsSubstring& aMedia) override; + + nsresult LoadXSLStyleSheet(nsIURI* aUrl); + + bool CanStillPrettyPrint(); + + nsresult MaybePrettyPrint(); + + bool IsMonolithicContainer(mozilla::dom::NodeInfo* aNodeInfo); + + nsresult HandleStartElement(const char16_t *aName, const char16_t **aAtts, + uint32_t aAttsCount, uint32_t aLineNumber, + bool aInterruptable); + nsresult HandleEndElement(const char16_t *aName, bool aInterruptable); + nsresult HandleCharacterData(const char16_t *aData, uint32_t aLength, + bool aInterruptable); + + nsCOMPtr<nsIContent> mDocElement; + nsCOMPtr<nsIContent> mCurrentHead; // When set, we're in an XHTML <haed> + + XMLContentSinkState mState; + + // The length of the valid data in mText. + int32_t mTextLength; + + int32_t mNotifyLevel; + nsCOMPtr<nsIContent> mLastTextNode; + + uint8_t mPrettyPrintXML : 1; + uint8_t mPrettyPrintHasSpecialRoot : 1; + uint8_t mPrettyPrintHasFactoredElements : 1; + uint8_t mPrettyPrinting : 1; // True if we called PrettyPrint() and it + // decided we should in fact prettyprint. + // True to call prevent script execution in the fragment mode. + uint8_t mPreventScriptExecution : 1; + + nsTArray<StackNode> mContentStack; + + nsCOMPtr<nsIDocumentTransformer> mXSLTProcessor; + + // Holds the children in the prolog until the root element is added, after which they're + // inserted in the document. However, if we're doing an XSLT transform this will + // actually hold all the children of the source document, until the transform is + // finished. After the transform is finished we'll just discard the children. + nsTArray<nsCOMPtr<nsIContent>> mDocumentChildren; + + static const int NS_ACCUMULATION_BUFFER_SIZE = 4096; + // Our currently accumulated text that we have not flushed to a textnode yet. + char16_t mText[NS_ACCUMULATION_BUFFER_SIZE]; +}; + +#endif // nsXMLContentSink_h__ |