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/* -*- Mode: C++; tab-width: 8; 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/. */
#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__
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