/*************************************************************************
 *
 *  $RCSfile: DocumentHelper.java,v $
 *
 *  $Revision: 1.3 $
 *
 *  last change: $Author: hr $ $Date: 2003-06-30 15:27:13 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  the BSD license.
 *
 *  Copyright (c) 2003 by Sun Microsystems, 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.
 *  3. Neither the name of Sun Microsystems, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "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 THE
 *  COPYRIGHT OWNER 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.
 *
 *************************************************************************/

import com.sun.star.uno.*;
import com.sun.star.lang.*;
import com.sun.star.util.*;
import com.sun.star.container.*;
import com.sun.star.awt.*;
import com.sun.star.drawing.*;
import com.sun.star.frame.*;
import com.sun.star.form.*;
import com.sun.star.beans.*;

/**************************************************************************/
/** provides a small wrapper around a document
*/
public class DocumentHelper
{
    protected XMultiServiceFactory  m_xMSF;
    protected XComponent            m_xDocument;

    /* ------------------------------------------------------------------ */
    public XComponent   getDocument( )
    {
        return m_xDocument;
    }

    /* ------------------------------------------------------------------ */
    public DocumentHelper( XMultiServiceFactory xMSF, XComponent xDocument )
    {
        m_xMSF = xMSF;
        m_xDocument = xDocument;
    }

    /* ------------------------------------------------------------------ */
    /** retrieves the current view of the document
        @return
            the view component, queried for the interface described by aInterfaceClass
    */
    public DocumentViewHelper getCurrentView( )
    {
        // get the model interface for the document
        XModel xDocModel = (XModel)UnoRuntime.queryInterface(XModel.class, m_xDocument );
        // get the current controller for the document - as a controller is tied to a view,
        // this gives us the currently active view for the document.
        XController xController = xDocModel.getCurrentController();
        return new DocumentViewHelper( m_xMSF, this, xController );
    }

    /* ------------------------------------------------------------------ */
    /** classifies a document
    */
    public DocumentType classify( )
    {
        XServiceInfo xSI = UNO.queryServiceInfo( m_xDocument );
        if ( xSI.supportsService( "com.sun.star.text.TextDocument" ) )
            return DocumentType.WRITER;
        else if ( xSI.supportsService( "com.sun.star.sheet.SpreadsheetDocument" ) )
            return DocumentType.CALC;
        else if ( xSI.supportsService( "com.sun.star.drawing.DrawingDocument" ) )
            return DocumentType.DRAWING;

        return DocumentType.UNKNOWN;
    }

    /* ------------------------------------------------------------------ */
    /** creates a new form which is a child of the given form components container

        @param xParentContainer
            The parent container for the new form
        @param sInitialName
            The initial name of the form. May be null, in this case the default (which
            is an implementation detail) applies.
    */
    protected XIndexContainer createSubForm( XIndexContainer xParentContainer, String sInitialName )
        throws com.sun.star.uno.Exception
    {
        // create a new form
        Object xNewForm = m_xMSF.createInstance( "com.sun.star.form.component.DataForm" );

        // insert
        xParentContainer.insertByIndex( xParentContainer.getCount(), xNewForm );

        // set the name if necessary
        if ( null != sInitialName )
        {
            XPropertySet xFormProps = UNO.queryPropertySet( xNewForm );
            xFormProps.setPropertyValue( "Name", sInitialName );
        }

        // outta here
        return UNO.queryIndexContainer( xNewForm );
    }

    /* ------------------------------------------------------------------ */
    /** creates a new form which is a child of the given form components container

        @param aParentContainer
            The parent container for the new form
        @param sInitialName
            The initial name of the form. May be null, in this case the default (which
            is an implementation detail) applies.
    */
    public XIndexContainer createSubForm( Object aParentContainer, String sInitialName )
        throws com.sun.star.uno.Exception
    {
        XIndexContainer xParentContainer = UNO.queryIndexContainer( aParentContainer );
        return createSubForm( xParentContainer, sInitialName );
    }

    /* ------------------------------------------------------------------ */
    /** creates a form which is a sibling of the given form

        @param aForm
            A sinbling of the to be created form.

        @param sInitialName
            The initial name of the form. May be null, in this case the default (which
            is an implementation detail) applies.
    */
    public XIndexContainer createSiblingForm( Object aForm, String sInitialName ) throws com.sun.star.uno.Exception
    {
        // get the parent
        XIndexContainer xContainer = (XIndexContainer)FLTools.getParent(
            aForm, XIndexContainer.class );
        // append a new form to this parent container
        return createSubForm( xContainer, sInitialName );
    }

    /* ------------------------------------------------------------------ */
    /** retrieves the document model which a given form component belongs to
    */
    static public DocumentHelper getDocumentForComponent( Object aFormComponent, XMultiServiceFactory xMSF )
    {
        XChild xChild = (XChild)UnoRuntime.queryInterface( XChild.class, aFormComponent );
        XModel xModel = null;
        while ( ( null != xChild ) && ( null == xModel ) )
        {
            XInterface xParent = (XInterface)xChild.getParent();
            xModel = (XModel)UnoRuntime.queryInterface( XModel.class, xParent );
            xChild = (XChild)UnoRuntime.queryInterface( XChild.class, xParent );
        }

        return new DocumentHelper( xMSF, xModel );
    }

    /* ------------------------------------------------------------------ */
    /** gets the <type scope="com.sun.star.drawing">DrawPage</type> of the document
    */
    protected XDrawPage getMainDrawPage( ) throws com.sun.star.uno.Exception
    {
        XDrawPage xReturn;

        // in case of a Writer document, this is rather easy: simply ask the XDrawPageSupplier
        XDrawPageSupplier xSuppPage = (XDrawPageSupplier)UnoRuntime.queryInterface(
            XDrawPageSupplier.class, getDocument() );
        if ( null != xSuppPage )
            xReturn = xSuppPage.getDrawPage();
        else
        {   // the model itself is no draw page supplier - okay, it may be a Writer or Calc document
            // (or any other multi-page document)
            XDrawPagesSupplier xSuppPages = (XDrawPagesSupplier)UnoRuntime.queryInterface(
                XDrawPagesSupplier.class, getDocument() );
            XDrawPages xPages = xSuppPages.getDrawPages();

            xReturn = (XDrawPage)UnoRuntime.queryInterface( XDrawPage.class,
                xPages.getByIndex( 0 ) );

            // Note that this is no really error-proof code: If the document model does not support the
            // XDrawPagesSupplier interface, or if the pages collection returned is empty, this will break.
        }

        return xReturn;
    }

    /* ------------------------------------------------------------------ */
    /** retrieves the root of the hierarchy of form components
    */
    protected XNameContainer getFormComponentTreeRoot( ) throws com.sun.star.uno.Exception
    {
        XFormsSupplier xSuppForms = (XFormsSupplier)UnoRuntime.queryInterface(
            XFormsSupplier.class, getMainDrawPage( ) );

        XNameContainer xFormsCollection = null;
        if ( null != xSuppForms )
        {
            xFormsCollection = xSuppForms.getForms();
        }
        return xFormsCollection;
    }
};