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/*
* Copyright (C) 2010 Google, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef HTMLTreeBuilder_h
#define HTMLTreeBuilder_h
#include "Element.h"
#include "FragmentScriptingPermission.h"
#include "HTMLElementStack.h"
#include "HTMLFormattingElementList.h"
#include "HTMLTokenizer.h"
#include <wtf/Noncopyable.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/unicode/Unicode.h>
namespace WebCore {
class AtomicHTMLToken;
class Document;
class DocumentFragment;
class Frame;
class HTMLToken;
class HTMLDocument;
class LegacyHTMLTreeBuilder;
class Node;
class HTMLTreeBuilder : public Noncopyable {
public:
// FIXME: Replace constructors with create() functions returning PassOwnPtrs
HTMLTreeBuilder(HTMLTokenizer*, HTMLDocument*, bool reportErrors);
HTMLTreeBuilder(HTMLTokenizer*, DocumentFragment*, FragmentScriptingPermission);
~HTMLTreeBuilder();
void setPaused(bool paused) { m_isPaused = paused; }
bool isPaused() const { return m_isPaused; }
// The token really should be passed as a const& since it's never modified.
void constructTreeFromToken(HTMLToken&);
// Must be called when parser is paused before calling the parser again.
PassRefPtr<Element> takeScriptToProcess(int& scriptStartLine);
// Done, close any open tags, etc.
void finished();
static HTMLTokenizer::State adjustedLexerState(HTMLTokenizer::State, const AtomicString& tagName, Frame*);
// FIXME: This is a dirty, rotten hack to keep HTMLFormControlElement happy
// until we stop using the legacy parser. DO NOT CALL THIS METHOD.
LegacyHTMLTreeBuilder* legacyTreeBuilder() const { return m_legacyTreeBuilder.get(); }
private:
// Represents HTML5 "insertion mode"
// http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#insertion-mode
enum InsertionMode {
InitialMode,
BeforeHTMLMode,
BeforeHeadMode,
InHeadMode,
InHeadNoscriptMode,
AfterHeadMode,
InBodyMode,
TextMode,
InTableMode,
InTableTextMode,
InCaptionMode,
InColumnGroupMode,
InTableBodyMode,
InRowMode,
InCellMode,
InSelectMode,
InSelectInTableMode,
InForeignContentMode,
AfterBodyMode,
InFramesetMode,
AfterFramesetMode,
AfterAfterBodyMode,
AfterAfterFramesetMode,
};
void passTokenToLegacyParser(HTMLToken&);
// Specialized functions for processing the different types of tokens.
void processToken(AtomicHTMLToken&);
void processDoctypeToken(AtomicHTMLToken&);
void processStartTag(AtomicHTMLToken&);
void processEndTag(AtomicHTMLToken&);
void processComment(AtomicHTMLToken&);
void processCharacter(AtomicHTMLToken&);
void processEndOfFile(AtomicHTMLToken&);
// Default processing for the different insertion modes.
void processDefaultForInitialMode(AtomicHTMLToken&);
void processDefaultForBeforeHTMLMode(AtomicHTMLToken&);
void processDefaultForBeforeHeadMode(AtomicHTMLToken&);
void processDefaultForInHeadMode(AtomicHTMLToken&);
void processDefaultForInHeadNoscriptMode(AtomicHTMLToken&);
void processDefaultForAfterHeadMode(AtomicHTMLToken&);
bool processStartTagForInHead(AtomicHTMLToken&);
bool processBodyEndTagForInBody(AtomicHTMLToken&);
void processFakePEndTagIfPInScope();
HTMLElementStack::ElementRecord* furthestBlockForFormattingElement(Element*);
void findFosterParentFor(Element*);
void reparentChildren(Element* oldParent, Element* newParent);
void callTheAdoptionAgency(AtomicHTMLToken&);
template<typename ChildType>
PassRefPtr<ChildType> attach(Node* parent, PassRefPtr<ChildType> prpChild)
{
RefPtr<ChildType> child = prpChild;
parent->parserAddChild(child);
// It's slightly unfortunate that we need to hold a reference to child
// here to call attach(). We should investigate whether we can rely on
// |parent| to hold a ref at this point. In the common case (at least
// for elements), however, we'll get to use this ref in the stack of
// open elements.
child->attach();
return child.release();
}
void insertDoctype(AtomicHTMLToken&);
void insertComment(AtomicHTMLToken&);
void insertCommentOnDocument(AtomicHTMLToken&);
void insertCommentOnHTMLHtmlElement(AtomicHTMLToken&);
void insertHTMLHtmlElement(AtomicHTMLToken&);
void insertHTMLHeadElement(AtomicHTMLToken&);
void insertHTMLBodyElement(AtomicHTMLToken&);
void insertElement(AtomicHTMLToken&);
void insertSelfClosingElement(AtomicHTMLToken&);
void insertFormattingElement(AtomicHTMLToken&);
void insertGenericRCDATAElement(AtomicHTMLToken&);
void insertGenericRawTextElement(AtomicHTMLToken&);
void insertScriptElement(AtomicHTMLToken&);
void insertTextNode(AtomicHTMLToken&);
void insertHTMLStartTagBeforeHTML(AtomicHTMLToken&);
void insertHTMLStartTagInBody(AtomicHTMLToken&);
PassRefPtr<Element> createElement(AtomicHTMLToken&);
PassRefPtr<Element> createElementAndAttachToCurrent(AtomicHTMLToken&);
void mergeAttributesFromTokenIntoElement(AtomicHTMLToken&, Element*);
bool indexOfFirstUnopenFormattingElement(unsigned& firstUnopenElementIndex) const;
void reconstructTheActiveFormattingElements();
void generateImpliedEndTags();
void generateImpliedEndTagsWithExclusion(const AtomicString& tagName);
Element* currentElement() { return m_openElements.top(); }
RefPtr<Element> m_headElement;
RefPtr<Element> m_formElement;
HTMLElementStack m_openElements;
HTMLFormattingElementList m_activeFormattingElements;
bool m_framesetOk;
// FIXME: Implement error reporting.
void parseError(AtomicHTMLToken&) { }
void handleScriptStartTag();
void handleScriptEndTag(Element*, int scriptStartLine);
void setInsertionMode(InsertionMode value) { m_insertionMode = value; }
InsertionMode insertionMode() const { return m_insertionMode; }
static bool isScriptingFlagEnabled(Frame* frame);
Document* m_document; // This is only used by the m_legacyParser for now.
bool m_reportErrors;
bool m_isPaused;
InsertionMode m_insertionMode;
InsertionMode m_originalInsertionMode;
// HTML5 spec requires that we be able to change the state of the tokenizer
// from within parser actions.
HTMLTokenizer* m_tokenizer;
// We're re-using logic from the old LegacyHTMLTreeBuilder while this class is being written.
OwnPtr<LegacyHTMLTreeBuilder> m_legacyTreeBuilder;
// These members are intentionally duplicated as the first set is a hack
// on top of the legacy parser which will eventually be removed.
RefPtr<Element> m_lastScriptElement; // FIXME: Hack for <script> support on top of the old parser.
int m_lastScriptElementStartLine; // FIXME: Hack for <script> support on top of the old parser.
RefPtr<Element> m_scriptToProcess; // <script> tag which needs processing before resuming the parser.
int m_scriptToProcessStartLine; // Starting line number of the script tag needing processing.
// FIXME: FragmentScriptingPermission is a HACK for platform/Pasteboard.
// FragmentScriptingNotAllowed causes the Parser to remove children
// from <script> tags (so javascript doesn't show up in pastes).
FragmentScriptingPermission m_fragmentScriptingPermission;
bool m_isParsingFragment;
};
}
#endif
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