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/* -*- 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 */
#ifndef mozilla_dom_PrototypeDocumentContentSink_h__
#define mozilla_dom_PrototypeDocumentContentSink_h__
#include "mozilla/Attributes.h"
#include "nsIContentSink.h"
#include "nsTArray.h"
#include "nsCOMPtr.h"
#include "nsCRT.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIDTD.h"
#include "mozilla/dom/FromParser.h"
#include "nsXULPrototypeDocument.h"
#include "nsIStreamLoader.h"
#include "nsIScriptContext.h"
#include "nsICSSLoaderObserver.h"
#include "mozilla/Logging.h"
class nsIURI;
class nsIChannel;
class nsIContent;
class nsIParser;
class nsTextNode;
class nsINode;
class nsXULPrototypeElement;
class nsXULPrototypePI;
class nsXULPrototypeScript;
namespace mozilla {
namespace dom {
class Element;
class ScriptLoader;
class Document;
class XMLStylesheetProcessingInstruction;
} // namespace dom
} // namespace mozilla
nsresult NS_NewPrototypeDocumentContentSink(nsIContentSink** aResult,
mozilla::dom::Document* aDoc,
nsISupports* aContainer,
nsIChannel* aChannel);
namespace mozilla {
namespace dom {
class PrototypeDocumentContentSink final : public nsIStreamLoaderObserver,
public nsIContentSink,
public nsICSSLoaderObserver,
public nsIOffThreadScriptReceiver {
nsresult Init(Document* aDoc, nsIURI* aURL, nsISupports* aContainer,
nsIChannel* aChannel);
// nsISupports
// nsIContentSink
NS_IMETHOD WillParse(void) override { return NS_OK; };
NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) override { return NS_OK; };
NS_IMETHOD DidBuildModel(bool aTerminated) override { return NS_OK; };
NS_IMETHOD WillInterrupt(void) override { return NS_OK; };
NS_IMETHOD WillResume(void) override { return NS_OK; };
NS_IMETHOD SetParser(nsParserBase* aParser) override;
virtual void InitialTranslationCompleted() override;
virtual void FlushPendingNotifications(FlushType aType) override{};
virtual void SetDocumentCharset(NotNull<const Encoding*> aEncoding) override;
virtual nsISupports* GetTarget() override;
virtual bool IsScriptExecuting() override;
virtual void ContinueInterruptedParsingAsync() override;
// nsICSSLoaderObserver
NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet, bool aWasDeferred,
nsresult aStatus) override;
// nsIOffThreadScriptReceiver
NS_IMETHOD OnScriptCompileComplete(JSScript* aScript,
nsresult aStatus) override;
nsresult OnPrototypeLoadDone(nsXULPrototypeDocument* aPrototype);
virtual ~PrototypeDocumentContentSink();
static LazyLogModule gLog;
nsIParser* GetParser();
void ContinueInterruptedParsingIfEnabled();
void StartLayout();
virtual nsresult AddAttributes(nsXULPrototypeElement* aPrototype,
Element* aElement);
RefPtr<nsParserBase> mParser;
nsCOMPtr<nsIURI> mDocumentURI;
RefPtr<Document> mDocument;
RefPtr<ScriptLoader> mScriptLoader;
PrototypeDocumentContentSink* mNextSrcLoadWaiter; // [OWNER] but not COMPtr
* The prototype-script of the current transcluded script that is being
* loaded. For document.write('<script src="nestedwrite.js"><\/script>')
* to work, these need to be in a stack element type, and we need to hold
* the top of stack here.
nsXULPrototypeScript* mCurrentScriptProto;
* Whether the current transcluded script is being compiled off thread.
* The load event is blocked while this is in progress.
bool mOffThreadCompiling;
* If the current transcluded script is being compiled off thread, the
* source for that script.
char16_t* mOffThreadCompileStringBuf;
size_t mOffThreadCompileStringLength;
* Wether the prototype document is still be traversed to create the DOM.
* Layout will not be started until false.
bool mStillWalking;
* Number of style sheets still loading. Layout will not start until zero.
uint32_t mPendingSheets;
* Context stack, which maintains the state of the Builder and allows
* it to be interrupted.
class ContextStack {
struct Entry {
nsXULPrototypeElement* mPrototype;
nsIContent* mElement;
int32_t mIndex;
Entry* mNext;
Entry* mTop;
int32_t mDepth;
int32_t Depth() { return mDepth; }
nsresult Push(nsXULPrototypeElement* aPrototype, nsIContent* aElement);
nsresult Pop();
nsresult Peek(nsXULPrototypeElement** aPrototype, nsIContent** aElement,
int32_t* aIndex);
nsresult SetTopIndex(int32_t aIndex);
friend class ContextStack;
ContextStack mContextStack;
* The current prototype that we are walking to construct the
* content model.
RefPtr<nsXULPrototypeDocument> mCurrentPrototype;
nsresult CreateAndInsertPI(const nsXULPrototypePI* aProtoPI);
nsresult ExecuteScript(nsXULPrototypeScript* aScript);
nsresult LoadScript(nsXULPrototypeScript* aScriptProto, bool* aBlock);
* A wrapper around ResumeWalkInternal to report walking errors.
nsresult ResumeWalk();
* Resume (or initiate) an interrupted (or newly prepared)
* prototype walk.
nsresult ResumeWalkInternal();
* Called at the end of ResumeWalk(), from StyleSheetLoaded(),
* and from DocumentL10n.
* If walking, stylesheets and l10n are not blocking, it
* will trigger `DoneWalking()`.
nsresult MaybeDoneWalking();
* Called from `MaybeDoneWalking()`.
* Expects that both the prototype document walk is complete and
* all referenced stylesheets finished loading.
nsresult DoneWalking();
* Create a delegate content model element from a prototype.
* Note that the resulting content node is not bound to any tree
nsresult CreateElementFromPrototype(nsXULPrototypeElement* aPrototype,
Element** aResult, nsIContent* aParent);
* Prepare to walk the current prototype.
nsresult PrepareToWalk();
* Creates a processing instruction based on aProtoPI and inserts
* it to the DOM.
nsresult CreateAndInsertPI(const nsXULPrototypePI* aProtoPI, nsINode* aParent,
nsINode* aBeforeThis);
* Inserts the passed <?xml-stylesheet ?> PI at the specified
* index. Loads and applies the associated stylesheet
* asynchronously.
* The prototype document walk can happen before the stylesheets
* are loaded, but the final steps in the load process (see
* DoneWalking()) are not run before all the stylesheets are done
* loading.
nsresult InsertXMLStylesheetPI(const nsXULPrototypePI* aProtoPI,
nsINode* aParent, nsINode* aBeforeThis,
XMLStylesheetProcessingInstruction* aPINode);
void CloseElement(Element* aElement);
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_PrototypeDocumentContentSink_h__