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Source Code of PageHelper

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// __________ Imports __________

import com.sun.star.uno.UnoRuntime;
import com.sun.star.lang.XComponent;
import com.sun.star.lang.XServiceInfo;

import com.sun.star.awt.Size;

import com.sun.star.beans.XPropertySet;

import com.sun.star.drawing.XDrawPage;
import com.sun.star.drawing.XDrawPages;
import com.sun.star.drawing.XDrawPagesSupplier;
import com.sun.star.drawing.XMasterPageTarget;
import com.sun.star.drawing.XMasterPagesSupplier;

import com.sun.star.presentation.XPresentationPage;
import com.sun.star.presentation.XHandoutMasterSupplier;


public class PageHelper
{
    // __________ static helper methods __________

    // __________ draw pages __________

    /** get the page count for standard pages
  */
  static public int getDrawPageCount( XComponent xComponent )
  {
    XDrawPagesSupplier xDrawPagesSupplier =
      (XDrawPagesSupplier)UnoRuntime.queryInterface(
        XDrawPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xDrawPagesSupplier.getDrawPages();
    return xDrawPages.getCount();
  }

    /** get draw page by index
  */
  static public XDrawPage getDrawPageByIndex( XComponent xComponent, int nIndex )
    throws com.sun.star.lang.IndexOutOfBoundsException,
      com.sun.star.lang.WrappedTargetException
  {
    XDrawPagesSupplier xDrawPagesSupplier =
      (XDrawPagesSupplier)UnoRuntime.queryInterface(
        XDrawPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xDrawPagesSupplier.getDrawPages();
    return (XDrawPage)UnoRuntime.queryInterface(XDrawPage.class, xDrawPages.getByIndex( nIndex ));
  }

    /** creates and inserts a draw page into the giving position,
    the method returns the new created page
  */
  static public XDrawPage insertNewDrawPageByIndex( XComponent xComponent, int nIndex )
    throws Exception
  {
    XDrawPagesSupplier xDrawPagesSupplier =
      (XDrawPagesSupplier)UnoRuntime.queryInterface(
        XDrawPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xDrawPagesSupplier.getDrawPages();
    return xDrawPages.insertNewByIndex( nIndex );
  }

    /** removes the given page
  */
  static public void removeDrawPage( XComponent xComponent, XDrawPage xDrawPage )
  {
    XDrawPagesSupplier xDrawPagesSupplier =
      (XDrawPagesSupplier)UnoRuntime.queryInterface(
        XDrawPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xDrawPagesSupplier.getDrawPages();
    xDrawPages.remove( xDrawPage );
  }

  /** get size of the given page
  */
  static public Size getPageSize( XDrawPage xDrawPage )
    throws com.sun.star.beans.UnknownPropertyException,
      com.sun.star.lang.WrappedTargetException
  {
    XPropertySet xPageProperties = (XPropertySet)
      UnoRuntime.queryInterface( XPropertySet.class, xDrawPage );
    return new Size(
      ((Integer)xPageProperties.getPropertyValue( "Width" )).intValue(),
      ((Integer)xPageProperties.getPropertyValue( "Height" )).intValue() );
  }

    // __________ master pages __________

    /** get the page count for master pages
  */
  static public int getMasterPageCount( XComponent xComponent )
  {
    XMasterPagesSupplier xMasterPagesSupplier =
      (XMasterPagesSupplier)UnoRuntime.queryInterface(
        XMasterPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xMasterPagesSupplier.getMasterPages();
    return xDrawPages.getCount();
  }

    /** get master page by index
  */
  static public XDrawPage getMasterPageByIndex( XComponent xComponent, int nIndex )
    throws com.sun.star.lang.IndexOutOfBoundsException,
      com.sun.star.lang.WrappedTargetException
  {
    XMasterPagesSupplier xMasterPagesSupplier =
      (XMasterPagesSupplier)UnoRuntime.queryInterface(
        XMasterPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xMasterPagesSupplier.getMasterPages();
    return (XDrawPage)UnoRuntime.queryInterface(XDrawPage.class, xDrawPages.getByIndex( nIndex ));
  }

    /** creates and inserts a new master page into the giving position,
    the method returns the new created page
  */
  static public XDrawPage insertNewMasterPageByIndex( XComponent xComponent, int nIndex )
  {
    XMasterPagesSupplier xMasterPagesSupplier =
      (XMasterPagesSupplier)UnoRuntime.queryInterface(
        XMasterPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xMasterPagesSupplier.getMasterPages();
    return xDrawPages.insertNewByIndex( nIndex );
  }

    /** removes the given page
  */
  static public void removeMasterPage( XComponent xComponent, XDrawPage xDrawPage )
  {
    XMasterPagesSupplier xMasterPagesSupplier =
      (XMasterPagesSupplier)UnoRuntime.queryInterface(
        XMasterPagesSupplier.class, xComponent );
    XDrawPages xDrawPages = xMasterPagesSupplier.getMasterPages();
    xDrawPages.remove( xDrawPage );
  }

    /** return the corresponding masterpage for the giving drawpage
  */
  static public XDrawPage getMasterPage( XDrawPage xDrawPage )
  {
    XMasterPageTarget xMasterPageTarget =
      (XMasterPageTarget)UnoRuntime.queryInterface(
        XMasterPageTarget.class, xDrawPage );
    return xMasterPageTarget.getMasterPage();
  }

    /** sets given masterpage at the drawpage
  */
  static public void setMasterPage( XDrawPage xDrawPage, XDrawPage xMasterPage )
  {
    XMasterPageTarget xMasterPageTarget =
      (XMasterPageTarget)UnoRuntime.queryInterface(
        XMasterPageTarget.class, xDrawPage );
    xMasterPageTarget.setMasterPage( xMasterPage );
  }

    // __________ presentation pages __________

  /** test if a Presentation Document is supported.
    This is important, because only presentation documents
    have notes and handout pages
  */
  static public boolean isImpressDocument( XComponent xComponent )
  {
    XServiceInfo xInfo = (XServiceInfo)UnoRuntime.queryInterface(
        XServiceInfo.class, xComponent );   
    return xInfo.supportsService( "com.sun.star.presentation.PresentationDocument" );
  }

    /** in impress documents each normal draw page has a corresponding notes page
  */
  static public XDrawPage getNotesPage( XDrawPage xDrawPage )
  {
    XPresentationPage aPresentationPage =
      (XPresentationPage)UnoRuntime.queryInterface(
        XPresentationPage.class, xDrawPage );
    return aPresentationPage.getNotesPage();
  }

    /** in impress each documents has one handout page
  */
  static public XDrawPage getHandoutMasterPage( XComponent xComponent )
  {
    XHandoutMasterSupplier aHandoutMasterSupplier =
      (XHandoutMasterSupplier)UnoRuntime.queryInterface(
        XHandoutMasterSupplier.class, xComponent );
    return aHandoutMasterSupplier.getHandoutMasterPage();
  }
}
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