poi/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFSlide.java

/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (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.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */
package org.apache.poi.xslf.usermodel;

import java.awt.*;
import java.io.IOException;

import org.apache.poi.POIXMLDocumentPart;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.openxml4j.opc.PackageRelationship;
import org.apache.poi.util.Beta;
import org.apache.xmlbeans.XmlException;
import org.apache.xmlbeans.XmlObject;
import org.openxmlformats.schemas.drawingml.x2006.main.CTGroupShapeProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.CTGroupTransform2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPoint2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTransform2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTextListStyle;
import org.openxmlformats.schemas.presentationml.x2006.main.CTCommonSlideData;
import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShape;
import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShapeNonVisual;
import org.openxmlformats.schemas.presentationml.x2006.main.CTSlide;
import org.openxmlformats.schemas.presentationml.x2006.main.SldDocument;
import org.openxmlformats.schemas.presentationml.x2006.main.CTPlaceholder;

@Beta
public final class XSLFSlide extends XSLFSheet {
   private final CTSlide _slide;
   private XSLFSlideLayout _layout;
   private XSLFComments _comments;
   private XSLFNotes _notes;

    /**
     * Create a new slide
     */
    XSLFSlide() {
        super();
        _slide = prototype();
        setCommonSlideData(_slide.getCSld());
    }

    /**
     * Construct a SpreadsheetML slide from a package part
     *
     * @param part the package part holding the slide data,
     * the content type must be <code>application/vnd.openxmlformats-officedocument.slide+xml</code>
     * @param rel  the package relationship holding this slide,
     * the relationship type must be http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide
     */
    XSLFSlide(PackagePart part, PackageRelationship rel) throws IOException, XmlException {
        super(part, rel);

        SldDocument doc =
            SldDocument.Factory.parse(getPackagePart().getInputStream());
        _slide = doc.getSld();
        setCommonSlideData(_slide.getCSld());
    }


    private static CTSlide prototype(){
        CTSlide ctSlide = CTSlide.Factory.newInstance();
        CTCommonSlideData cSld = ctSlide.addNewCSld();
        CTGroupShape spTree = cSld.addNewSpTree();

        CTGroupShapeNonVisual nvGrpSpPr = spTree.addNewNvGrpSpPr();
        CTNonVisualDrawingProps cnvPr = nvGrpSpPr.addNewCNvPr();
        cnvPr.setId(1);
        cnvPr.setName("");
        nvGrpSpPr.addNewCNvGrpSpPr();
        nvGrpSpPr.addNewNvPr();

        CTGroupShapeProperties grpSpr = spTree.addNewGrpSpPr();
        CTGroupTransform2D xfrm = grpSpr.addNewXfrm();
        CTPoint2D off = xfrm.addNewOff();
        off.setX(0);
        off.setY(0);
        CTPositiveSize2D ext = xfrm.addNewExt();
        ext.setCx(0);
        ext.setCy(0);
        CTPoint2D choff = xfrm.addNewChOff();
        choff.setX(0);
        choff.setY(0);
        CTPositiveSize2D chExt = xfrm.addNewChExt();
        chExt.setCx(0);
        chExt.setCy(0);
        ctSlide.addNewClrMapOvr().addNewMasterClrMapping();
        return ctSlide;
    }

    @Override
	public CTSlide getXmlObject() {
		return _slide;
	}

    @Override
    protected String getRootElementName(){
        return "sld";        
    }

    public XSLFSlideMaster getMasterSheet(){
        return getSlideLayout().getSlideMaster();
    }

    @Override
    public XSLFSlideLayout getSlideLayout(){
        if(_layout == null){
             for (POIXMLDocumentPart p : getRelations()) {
                if (p instanceof XSLFSlideLayout){
                   _layout = (XSLFSlideLayout)p;
                }
            }
        }
        if(_layout == null) {
            throw new IllegalArgumentException("SlideLayout was not found for " + this.toString());
        }
        return _layout;
    }

    @Override
    public XSLFSlideMaster getSlideMaster(){
        return getSlideLayout().getSlideMaster();
    }

    public XSLFComments getComments() {
       if(_comments == null) {
          for (POIXMLDocumentPart p : getRelations()) {
             if (p instanceof XSLFComments) {
                _comments = (XSLFComments)p;
             }
          }
       }
       if(_comments == null) {
          // This slide lacks comments
          // Not all have them, sorry...
          return null;
       }
       return _comments;
    }

    public XSLFNotes getNotes() {
       if(_notes == null) {
          for (POIXMLDocumentPart p : getRelations()) {
             if (p instanceof XSLFNotes){
                _notes = (XSLFNotes)p;
             }
          }
       }
       if(_notes == null) {
          // This slide lacks notes
          // Not al have them, sorry...
          return null;
       }
       return _notes;
    }

    public void setFollowMasterBackground(boolean value){
        _slide.setShowMasterSp(value);    
    }

    public boolean getFollowMasterBackground(){
        return !_slide.isSetShowMasterSp() || _slide.getShowMasterSp();    
    }

    /**
     *
     * @return title of this slide or empty string if title is not set
     */
    public String getTitle(){
        XSLFTextShape txt = getTextShapeByType(Placeholder.TITLE);
        return txt == null ? "" : txt.getText();
    }
    
    public XSLFTheme getTheme(){
    	return getSlideLayout().getSlideMaster().getTheme();
    }

    @Override
    public void draw(Graphics2D graphics){

        if (getFollowMasterBackground()){
            XSLFSlideLayout layout = getSlideLayout();
            layout.draw(graphics);
        }

        super.draw(graphics);
    }

    @Override
    public XSLFBackground getBackground(){
        if(_slide.getCSld().isSetBg()) {
            return new XSLFBackground(_slide.getCSld().getBg(), this);
        }
        return null;
    }

}