зеркало из https://github.com/mozilla/gecko-dev.git
334 строки
6.4 KiB
C++
334 строки
6.4 KiB
C++
/* 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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#define NS_HTML5_TREE_BUILDER_HANDLE_ARRAY_LENGTH 512
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private:
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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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nsHtml5OplessBuilder* mBuilder;
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// If mBuilder is not null, the tree op machinery is not in use and
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// the fields below aren't in use, either.
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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nsHtml5Highlighter* mViewSource;
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nsTArray<nsHtml5TreeOperation> mOpQueue;
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nsTArray<nsHtml5SpeculativeLoad> mSpeculativeLoadQueue;
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nsAHtml5TreeOpSink* mOpSink;
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mozilla::UniquePtr<nsIContent* []> mHandles;
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int32_t mHandlesUsed;
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nsTArray<mozilla::UniquePtr<nsIContent* []>> mOldHandles;
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nsHtml5TreeOpStage* mSpeculativeLoadStage;
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nsresult mBroken;
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bool mCurrentHtmlScriptIsAsyncOrDefer;
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bool mPreventScriptExecution;
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#ifdef DEBUG
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bool mActive;
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#endif
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// DocumentModeHandler
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/**
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* Tree builder uses this to report quirkiness of the document
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*/
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void
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documentMode(nsHtml5DocumentMode m);
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nsIContentHandle*
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getDocumentFragmentForTemplate(nsIContentHandle* aTemplate);
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nsIContentHandle*
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getFormPointerForContext(nsIContentHandle* aContext);
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/**
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* Using nsIContent** instead of nsIContent* is the parser deals with DOM
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* nodes in a way that works off the main thread. Non-main-thread code
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* can't refcount or otherwise touch nsIContent objects in any way.
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* Yet, the off-the-main-thread code needs to have a way to hold onto a
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* particular node and repeatedly operate on the same node.
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*
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* The way this works is that the off-the-main-thread code has an
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* nsIContent** for each DOM node and a given nsIContent** is only ever
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* actually dereferenced into an actual nsIContent* on the main thread.
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* When the off-the-main-thread code requests a new node, it gets an
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* nsIContent** immediately and a tree op is enqueued for later allocating
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* an actual nsIContent object and writing a pointer to it into the memory
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* location pointed to by the nsIContent**.
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*
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* Since tree ops are in a queue, the node creating tree op will always
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* run before tree ops that try to further operate on the node that the
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* nsIContent** is a handle to.
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*
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* On-the-main-thread parts of the parser use nsIContent* instead of
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* nsIContent**. Since both cases share the same parser core, the parser
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* core casts both to nsIContentHandle*.
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*/
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nsIContentHandle*
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AllocateContentHandle();
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void
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accumulateCharactersForced(const char16_t* aBuf,
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int32_t aStart,
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int32_t aLength)
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{
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accumulateCharacters(aBuf, aStart, aLength);
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}
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void
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MarkAsBrokenAndRequestSuspensionWithBuilder(nsresult aRv)
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{
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mBuilder->MarkAsBroken(aRv);
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requestSuspension();
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}
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void
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MarkAsBrokenAndRequestSuspensionWithoutBuilder(nsresult aRv)
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{
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MarkAsBroken(aRv);
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requestSuspension();
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}
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void
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MarkAsBrokenFromPortability(nsresult aRv);
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public:
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explicit nsHtml5TreeBuilder(nsHtml5OplessBuilder* aBuilder);
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nsHtml5TreeBuilder(nsAHtml5TreeOpSink* aOpSink, nsHtml5TreeOpStage* aStage);
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~nsHtml5TreeBuilder();
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void
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StartPlainTextViewSource(const nsAutoString& aTitle);
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void
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StartPlainText();
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void
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StartPlainTextBody();
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bool
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HasScript();
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void
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SetOpSink(nsAHtml5TreeOpSink* aOpSink)
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{
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mOpSink = aOpSink;
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}
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void
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ClearOps()
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{
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mOpQueue.Clear();
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}
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bool
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Flush(bool aDiscretionary = false);
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void
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FlushLoads();
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void
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SetDocumentCharset(NotNull<const Encoding*> aEncoding, int32_t aCharsetSource);
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void
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StreamEnded();
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void
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NeedsCharsetSwitchTo(NotNull<const Encoding*> aEncoding,
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int32_t aSource,
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int32_t aLineNumber);
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void
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MaybeComplainAboutCharset(const char* aMsgId, bool aError, int32_t aLineNumber);
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void
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TryToEnableEncodingMenu();
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void
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AddSnapshotToScript(nsAHtml5TreeBuilderState* aSnapshot, int32_t aLine);
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void
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DropHandles();
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void
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SetPreventScriptExecution(bool aPrevent)
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{
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mPreventScriptExecution = aPrevent;
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}
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bool
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HasBuilder()
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{
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return mBuilder;
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}
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/**
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* Makes sure the buffers are large enough to be able to tokenize aLength
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* UTF-16 code units before having to make the buffers larger.
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*
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* @param aLength the number of UTF-16 code units to be tokenized before the
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* next call to this method.
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* @return true if successful; false if out of memory
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*/
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bool
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EnsureBufferSpace(int32_t aLength);
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void
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EnableViewSource(nsHtml5Highlighter* aHighlighter);
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void
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errStrayStartTag(nsAtom* aName);
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void
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errStrayEndTag(nsAtom* aName);
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void
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errUnclosedElements(int32_t aIndex, nsAtom* aName);
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void
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errUnclosedElementsImplied(int32_t aIndex, nsAtom* aName);
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void
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errUnclosedElementsCell(int32_t aIndex);
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void
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errStrayDoctype();
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void
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errAlmostStandardsDoctype();
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void
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errQuirkyDoctype();
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void
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errNonSpaceInTrailer();
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void
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errNonSpaceAfterFrameset();
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void
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errNonSpaceInFrameset();
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void
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errNonSpaceAfterBody();
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void
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errNonSpaceInColgroupInFragment();
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void
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errNonSpaceInNoscriptInHead();
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void
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errFooBetweenHeadAndBody(nsAtom* aName);
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void
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errStartTagWithoutDoctype();
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void
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errNoSelectInTableScope();
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void
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errStartSelectWhereEndSelectExpected();
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void
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errStartTagWithSelectOpen(nsAtom* aName);
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void
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errBadStartTagInHead(nsAtom* aName);
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void
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errImage();
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void
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errIsindex();
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void
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errFooSeenWhenFooOpen(nsAtom* aName);
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void
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errHeadingWhenHeadingOpen();
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void
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errFramesetStart();
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void
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errNoCellToClose();
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void
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errStartTagInTable(nsAtom* aName);
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void
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errFormWhenFormOpen();
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void
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errTableSeenWhileTableOpen();
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void
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errStartTagInTableBody(nsAtom* aName);
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void
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errEndTagSeenWithoutDoctype();
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void
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errEndTagAfterBody();
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void
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errEndTagSeenWithSelectOpen(nsAtom* aName);
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void
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errGarbageInColgroup();
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void
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errEndTagBr();
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void
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errNoElementToCloseButEndTagSeen(nsAtom* aName);
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void
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errHtmlStartTagInForeignContext(nsAtom* aName);
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void
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errTableClosedWhileCaptionOpen();
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void
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errNoTableRowToClose();
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void
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errNonSpaceInTable();
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void
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errUnclosedChildrenInRuby();
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void
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errStartTagSeenWithoutRuby(nsAtom* aName);
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void
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errSelfClosing();
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void
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errNoCheckUnclosedElementsOnStack();
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void
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errEndTagDidNotMatchCurrentOpenElement(nsAtom* aName, nsAtom* aOther);
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void
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errEndTagViolatesNestingRules(nsAtom* aName);
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void
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errEndWithUnclosedElements(nsAtom* aName);
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void
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MarkAsBroken(nsresult aRv);
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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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nsresult
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IsBroken()
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{
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return mBroken;
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}
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