Mozilla/mozilla/extensions/transformiix/source/xslt/txExecutionState.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is TransforMiiX XSLT processor.
 *
 * The Initial Developer of the Original Code is
 * Jonas Sicking.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * Jonas Sicking. All Rights Reserved.
 *
 * Contributor(s):
 *   Jonas Sicking <jonas@sicking.cc>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef TRANSFRMX_TXEXECUTIONSTATE_H
#define TRANSFRMX_TXEXECUTIONSTATE_H

#include "txError.h"
#include "baseutils.h"
#include "txXMLEventHandler.h"
#include "nsCOMPtr.h"
#include "txStack.h"
#include "XMLUtils.h"
#include "nsVoidArray.h"
#include "txIXPathContext.h"
#include "txVariableMap.h"
#include "nsDoubleHashtable.h"
#include "txKey.h"
#include "txStylesheet.h"
#include "ExprResult.h"

class txInstruction;
class txIOutputHandlerFactory;
class txExpandedNameMap;


class txLoadedDocumentEntry : public PLDHashStringEntry {
public:
    txLoadedDocumentEntry(const void* aKey) : PLDHashStringEntry(aKey)
    {
    }
    ~txLoadedDocumentEntry()
    {
        delete mDocument;
    }
    Document* mDocument;
};

DECL_DHASH_WRAPPER(txLoadedDocumentsBase, txLoadedDocumentEntry, nsAString&)

class txLoadedDocumentsHash : public txLoadedDocumentsBase
{
public:
    ~txLoadedDocumentsHash();
    nsresult init(Document* aSourceDocument);
    void Add(Document* aDocument);
    Document* Get(const nsAString& aURI);

private:
    friend class txExecutionState;
    Document* mSourceDocument;
};


class txExecutionState : public txIMatchContext
{
public:
    txExecutionState(txStylesheet* aStylesheet);
    ~txExecutionState();
    nsresult init(Node* aNode, txExpandedNameMap* aGlobalParams);
    nsresult end();

    TX_DECL_MATCH_CONTEXT;

    /**
     * Struct holding information about a current template rule
     */
    struct TemplateRule {
        txStylesheet::ImportFrame* mFrame;
        PRInt32 mModeNsId;
        nsIAtom* mModeLocalName;
        txExpandedNameMap* mParams;
    };

    // Stack functions
    nsresult pushEvalContext(txIEvalContext* aContext);
    txIEvalContext* popEvalContext();
    nsresult pushString(const nsAString& aStr);
    void popString(nsAString& aStr);
    nsresult pushInt(PRInt32 aInt);
    PRInt32 popInt();
    nsresult pushResultHandler(txAXMLEventHandler* aHandler);
    txAXMLEventHandler* popResultHandler();
    nsresult pushTemplateRule(txStylesheet::ImportFrame* aFrame,
                              const txExpandedName& aMode,
                              txExpandedNameMap* aParams);
    void popTemplateRule();
    nsresult pushParamMap(txExpandedNameMap* aParams);
    txExpandedNameMap* popParamMap();

    // state-getting functions
    txIEvalContext* getEvalContext();
    txExpandedNameMap* getParamMap();
    Node* retrieveDocument(const nsAString& uri, const nsAString& baseUri);
    nsresult getKeyNodes(const txExpandedName& aKeyName, Document* aDocument,
                         const nsAString& aKeyValue, PRBool aIndexIfNotFound,
                         const NodeSet** aResult);
    TemplateRule* getCurrentTemplateRule();

    // state-modification functions
    txInstruction* getNextInstruction();
    nsresult runTemplate(txInstruction* aInstruction);
    nsresult runTemplate(txInstruction* aInstruction,
                         txInstruction* aReturnTo);
    void gotoInstruction(txInstruction* aNext);
    void returnFromTemplate();
    nsresult bindVariable(const txExpandedName& aName,
                          ExprResult* aValue, MBool aOwned);
    void removeVariable(const txExpandedName& aName);

    txAXMLEventHandler* mOutputHandler;
    txAXMLEventHandler* mResultHandler;
    txAOutputHandlerFactory* mOutputHandlerFactory;

    txExpandedNameMap* mTemplateParams;

    nsRefPtr<txStylesheet> mStylesheet;

private:
    txStack mReturnStack;
    txStack mLocalVarsStack;
    txStack mEvalContextStack;
    txStack mIntStack;
    txStack mResultHandlerStack;
    txStack mParamStack;
    nsStringArray mStringStack;
    txInstruction* mNextInstruction;
    txVariableMap* mLocalVariables;
    txVariableMap mGlobalVariableValues;
    nsAutoPtr<ExprResult> mGlobalVarPlaceholderValue;
    PRInt32 mRecursionDepth;

    TemplateRule* mTemplateRules;
    PRInt32 mTemplateRulesBufferSize;
    PRInt32 mTemplateRuleCount;

    txIEvalContext* mEvalContext;
    txIEvalContext* mInitialEvalContext;
    Document* mRTFDocument;
    txExpandedNameMap* mGlobalParams;

    txLoadedDocumentsHash mLoadedDocuments;
    txKeyHash mKeyHash;

    static const PRInt32 kMaxRecursionDepth;
};

#endif