/* -*- Mode: C++; tab-width: 4; 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 nsXULContentSink_h__
#define nsXULContentSink_h__
#include "mozilla/Attributes.h"
#include "mozilla/WeakPtr.h"
#include "nsIExpatSink.h"
#include "nsIWeakReferenceUtils.h"
#include "nsIXMLContentSink.h"
#include "nsNodeInfoManager.h"
#include "nsXULElement.h"
#include "nsIDTD.h"
class nsIScriptSecurityManager;
class nsAttrName;
class nsXULPrototypeDocument;
class nsXULPrototypeElement;
class nsXULPrototypeNode;
class XULContentSinkImpl final :
public nsIXMLContentSink,
public nsIExpatSink {
public:
XULContentSinkImpl();
// nsISupports
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIEXPATSINK
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(XULContentSinkImpl,
nsIXMLContentSink)
// nsIContentSink
NS_IMETHOD WillParse(
void) override {
return NS_OK; }
NS_IMETHOD DidBuildModel(
bool aTerminated) override;
NS_IMETHOD WillInterrupt(
void) override;
void WillResume() override;
NS_IMETHOD SetParser(nsParserBase* aParser) override;
virtual void FlushPendingNotifications(mozilla::FlushType aType) override {}
virtual void SetDocumentCharset(NotNull<
const Encoding*> aEncoding) override;
virtual nsISupports* GetTarget() override;
/**
* Initialize the content sink, giving it a document with which to communicate
* with the outside world, and an nsXULPrototypeDocument to build.
*/
nsresult Init(mozilla::dom::Document* aDocument,
nsXULPrototypeDocument* aPrototype);
protected:
virtual ~XULContentSinkImpl();
// pseudo-constants
char16_t* mText;
int32_t mTextLength;
int32_t mTextSize;
bool mConstrainSize;
nsresult AddAttributes(
const char16_t** aAttributes,
const uint32_t aAttrLen,
nsXULPrototypeElement* aElement);
nsresult OpenRoot(
const char16_t** aAttributes,
const uint32_t aAttrLen,
mozilla::dom::NodeInfo* aNodeInfo);
nsresult OpenTag(
const char16_t** aAttributes,
const uint32_t aAttrLen,
const uint32_t aLineNumber,
mozilla::dom::NodeInfo* aNodeInfo);
// If OpenScript returns NS_OK and after it returns our state is eInScript,
// that means that we created a prototype script and stuck it on
// mContextStack. If NS_OK is returned but the state is still
// eInDocumentElement then we didn't create a prototype script (e.g. the
// script had an unknown type), and the caller should create a prototype
// element.
nsresult OpenScript(
const char16_t** aAttributes,
const uint32_t aLineNumber);
static bool IsDataInBuffer(char16_t* aBuffer, int32_t aLength);
// Text management
nsresult FlushText(
bool aCreateTextNode =
true);
nsresult AddText(
const char16_t* aText, int32_t aLength);
RefPtr<nsNodeInfoManager> mNodeInfoManager;
nsresult NormalizeAttributeString(
const char16_t* aExpatName,
nsAttrName& aName);
public:
enum State { eInProlog, eInDocumentElement, eInScript, eInEpilog };
protected:
State mState;
// content stack management
class ContextStack {
protected:
struct Entry {
RefPtr<nsXULPrototypeNode> mNode;
// a LOT of nodes have children; preallocate for 8
nsPrototypeArray mChildren;
State mState;
Entry* mNext;
Entry(RefPtr<nsXULPrototypeNode>&& aNode, State aState, Entry* aNext)
: mNode(std::move(aNode)),
mChildren(8),
mState(aState),
mNext(aNext) {}
};
Entry* mTop;
int32_t mDepth;
public:
ContextStack();
~ContextStack();
int32_t Depth() {
return mDepth; }
void Push(RefPtr<nsXULPrototypeNode>&& aNode, State aState);
nsresult Pop(State* aState);
nsresult GetTopNode(RefPtr<nsXULPrototypeNode>& aNode);
nsresult GetTopChildren(nsPrototypeArray** aChildren);
void Clear();
void Traverse(nsCycleCollectionTraversalCallback& aCallback);
};
friend class ContextStack;
ContextStack mContextStack;
mozilla::WeakPtr<mozilla::dom::Document> mDocument;
nsCOMPtr<nsIURI> mDocumentURL;
// [OWNER]
RefPtr<nsXULPrototypeDocument> mPrototype;
// [OWNER]
RefPtr<nsParserBase> mParser;
nsCOMPtr<nsIScriptSecurityManager> mSecMan;
};
#endif /* nsXULContentSink_h__ */