зеркало из https://github.com/mozilla/gecko-dev.git
133 строки
4.0 KiB
C++
133 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=78: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsHtml5DocumentBuilder_h
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#define nsHtml5DocumentBuilder_h
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#include "mozilla/dom/Document.h"
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#include "nsContentSink.h"
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#include "nsHtml5DocumentMode.h"
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#include "nsIContent.h"
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namespace mozilla::dom {
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class Document;
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}
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typedef nsIContent* nsIContentPtr;
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enum eHtml5FlushState {
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eNotFlushing = 0, // not flushing
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eInFlush = 1, // the Flush() method is on the call stack
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eInDocUpdate = 2, // inside an update batch on the document
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};
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class nsHtml5DocumentBuilder : public nsContentSink {
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using Encoding = mozilla::Encoding;
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template <typename T>
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using NotNull = mozilla::NotNull<T>;
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public:
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsHtml5DocumentBuilder,
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nsContentSink)
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NS_DECL_ISUPPORTS_INHERITED
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inline void HoldElement(already_AddRefed<nsIContent> aContent) {
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*(mOwnedElements.AppendElement()) = aContent;
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}
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nsresult Init(Document* aDoc, nsIURI* aURI, nsISupports* aContainer,
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nsIChannel* aChannel);
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// Getters and setters for fields from nsContentSink
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Document* GetDocument() { return mDocument; }
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nsNodeInfoManager* GetNodeInfoManager() { return mNodeInfoManager; }
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/**
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* Marks this parser as broken and tells the stream parser (if any) to
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* terminate.
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*
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* @return aReason for convenience
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*/
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virtual nsresult MarkAsBroken(nsresult aReason);
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/**
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* Checks if this parser is broken. Returns a non-NS_OK (i.e. non-0)
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* value if broken.
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*/
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inline nsresult IsBroken() { return mBroken; }
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inline bool IsComplete() { return !mParser; }
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inline void BeginDocUpdate() {
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MOZ_RELEASE_ASSERT(IsInFlush(), "Tried to double-open doc update.");
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MOZ_RELEASE_ASSERT(mParser, "Started doc update without parser.");
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mFlushState = eInDocUpdate;
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mDocument->BeginUpdate();
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}
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inline void EndDocUpdate() {
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MOZ_RELEASE_ASSERT(IsInDocUpdate(),
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"Tried to end doc update without one open.");
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mFlushState = eInFlush;
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mDocument->EndUpdate();
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}
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inline void BeginFlush() {
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MOZ_RELEASE_ASSERT(mFlushState == eNotFlushing,
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"Tried to start a flush when already flushing.");
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MOZ_RELEASE_ASSERT(mParser, "Started a flush without parser.");
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mFlushState = eInFlush;
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}
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inline void EndFlush() {
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MOZ_RELEASE_ASSERT(IsInFlush(), "Tried to end flush when not flushing.");
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mFlushState = eNotFlushing;
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}
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inline bool IsInDocUpdate() { return mFlushState == eInDocUpdate; }
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inline bool IsInFlush() { return mFlushState == eInFlush; }
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void SetDocumentCharsetAndSource(NotNull<const Encoding*> aEncoding,
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int32_t aCharsetSource);
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/**
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* Sets up style sheet load / parse
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*/
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void UpdateStyleSheet(nsIContent* aElement);
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void SetDocumentMode(nsHtml5DocumentMode m);
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void SetNodeInfoManager(nsNodeInfoManager* aManager) {
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mNodeInfoManager = aManager;
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}
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// nsContentSink methods
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virtual void UpdateChildCounts() override;
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virtual nsresult FlushTags() override;
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protected:
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explicit nsHtml5DocumentBuilder(bool aRunsToCompletion);
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virtual ~nsHtml5DocumentBuilder();
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protected:
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AutoTArray<nsCOMPtr<nsIContent>, 32> mOwnedElements;
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/**
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* Non-NS_OK if this parser should refuse to process any more input.
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* For example, the parser needs to be marked as broken if it drops some
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* input due to a memory allocation failure. In such a case, the whole
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* parser needs to be marked as broken, because some input has been lost
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* and parsing more input could lead to a DOM where pieces of HTML source
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* that weren't supposed to become scripts become scripts.
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*/
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nsresult mBroken;
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eHtml5FlushState mFlushState;
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};
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#endif // nsHtml5DocumentBuilder_h
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