/* -*- 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 code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Peter Van der Beken <peterv@propagandism.org>
 *
 * 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
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * 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_TXMOZILLAXSLTPROCESSOR_H
#define TRANSFRMX_TXMOZILLAXSLTPROCESSOR_H

#include "nsAutoPtr.h"
#include "nsStubMutationObserver.h"
#include "nsIDocumentTransformer.h"
#include "nsIXSLTProcessor.h"
#include "nsIXSLTProcessorPrivate.h"
#include "txExpandedNameMap.h"
#include "txNamespaceMap.h"
#include "nsIJSNativeInitializer.h"
#include "nsCycleCollectionParticipant.h"

class nsIDOMNode;
class nsIPrincipal;
class nsIURI;
class nsIXMLContentSink;
class txStylesheet;
class txResultRecycler;
class txIGlobalParameter;

/* bacd8ad0-552f-11d3-a9f7-000064657374 */
#define TRANSFORMIIX_XSLT_PROCESSOR_CID   \
{ 0xbacd8ad0, 0x552f, 0x11d3, {0xa9, 0xf7, 0x00, 0x00, 0x64, 0x65, 0x73, 0x74} }

#define TRANSFORMIIX_XSLT_PROCESSOR_CONTRACTID \
"@mozilla.org/document-transformer;1?type=xslt"

#define XSLT_MSGS_URL  "chrome://global/locale/xslt/xslt.properties"

/**
 * txMozillaXSLTProcessor is a front-end to the XSLT Processor.
 */
class txMozillaXSLTProcessor : public nsIXSLTProcessor,
                               public nsIXSLTProcessorPrivate,
                               public nsIDocumentTransformer,
                               public nsStubMutationObserver,
                               public nsIJSNativeInitializer
{
public:
    /**
     * Creates a new txMozillaXSLTProcessor
     */
    txMozillaXSLTProcessor();

    /**
     * Default destructor for txMozillaXSLTProcessor
     */
    ~txMozillaXSLTProcessor();

    // nsISupports interface
    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(txMozillaXSLTProcessor,
                                             nsIXSLTProcessor)

    // nsIXSLTProcessor interface
    NS_DECL_NSIXSLTPROCESSOR

    // nsIXSLTProcessorPrivate interface
    NS_DECL_NSIXSLTPROCESSORPRIVATE

    // nsIDocumentTransformer interface
    NS_IMETHOD Init(nsIPrincipal* aPrincipal);
    NS_IMETHOD SetTransformObserver(nsITransformObserver* aObserver);
    NS_IMETHOD LoadStyleSheet(nsIURI* aUri, nsILoadGroup* aLoadGroup);
    NS_IMETHOD SetSourceContentModel(nsIDOMNode* aSource);
    NS_IMETHOD CancelLoads() {return NS_OK;}
    NS_IMETHOD AddXSLTParamNamespace(const nsString& aPrefix,
                                     const nsString& aNamespace);
    NS_IMETHOD AddXSLTParam(const nsString& aName,
                            const nsString& aNamespace,
                            const nsString& aSelect,
                            const nsString& aValue,
                            nsIDOMNode* aContext);

    // nsIMutationObserver interface
    NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
    NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
    NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
    NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
    NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
    NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED

    nsresult setStylesheet(txStylesheet* aStylesheet);
    void reportError(nsresult aResult, const PRUnichar *aErrorText,
                     const PRUnichar *aSourceText);

    nsIDOMNode *GetSourceContentModel()
    {
        return mSource;
    }

    nsresult TransformToDoc(nsIDOMDocument **aResult);

    bool IsLoadDisabled()
    {
        return (mFlags & DISABLE_ALL_LOADS) != 0;
    }

    // nsIJSNativeInitializer
    NS_IMETHODIMP Initialize(nsISupports* aOwner, JSContext *cx, JSObject *obj,
                             PRUint32 argc, jsval *argv);

    static nsresult Startup();
    static void Shutdown();

private:
    nsresult DoTransform();
    void notifyError();
    nsresult ensureStylesheet();

    nsRefPtr<txStylesheet> mStylesheet;
    nsIDocument* mStylesheetDocument; // weak
    nsCOMPtr<nsIContent> mEmbeddedStylesheetRoot;

    nsCOMPtr<nsIDOMNode> mSource;
    nsresult mTransformResult;
    nsresult mCompileResult;
    nsString mErrorText, mSourceText;
    nsCOMPtr<nsIPrincipal> mPrincipal;
    nsCOMPtr<nsITransformObserver> mObserver;
    txOwningExpandedNameMap<txIGlobalParameter> mVariables;
    txNamespaceMap mParamNamespaceMap;
    nsRefPtr<txResultRecycler> mRecycler;

    PRUint32 mFlags;
};

extern nsresult TX_LoadSheet(nsIURI* aUri, txMozillaXSLTProcessor* aProcessor,
                             nsILoadGroup* aLoadGroup,
                             nsIPrincipal* aCallerPrincipal);

extern nsresult TX_CompileStylesheet(nsINode* aNode,
                                     txMozillaXSLTProcessor* aProcessor,
                                     nsIPrincipal* aCallerPrincipal,
                                     txStylesheet** aStylesheet);

#endif
