org.apache.poi.xssf.usermodel.XSSFPicture Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
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package org.apache.poi.xssf.usermodel;
import java.awt.Dimension;
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.ss.usermodel.Picture;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.ImageUtils;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
import org.apache.poi.util.Internal;
import org.openxmlformats.schemas.drawingml.x2006.main.CTBlipFillProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualPictureProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPoint2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPresetGeometry2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTShapeProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTransform2D;
import org.openxmlformats.schemas.drawingml.x2006.main.STShapeType;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPicture;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPictureNonVisual;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCol;
/**
* Represents a picture shape in a SpreadsheetML drawing.
*
* @author Yegor Kozlov
*/
public final class XSSFPicture extends XSSFShape implements Picture {
private static final POILogger logger = POILogFactory.getLogger(XSSFPicture.class);
/**
* Column width measured as the number of characters of the maximum digit width of the
* numbers 0, 1, 2, ..., 9 as rendered in the normal style's font. There are 4 pixels of margin
* padding (two on each side), plus 1 pixel padding for the gridlines.
*
* This value is the same for default font in Office 2007 (Calibry) and Office 2003 and earlier (Arial)
*/
private static float DEFAULT_COLUMN_WIDTH = 9.140625f;
/**
* A default instance of CTShape used for creating new shapes.
*/
private static CTPicture prototype = null;
/**
* This object specifies a picture object and all its properties
*/
private CTPicture ctPicture;
/**
* Construct a new XSSFPicture object. This constructor is called from
* {@link XSSFDrawing#createPicture(XSSFClientAnchor, int)}
*
* @param drawing the XSSFDrawing that owns this picture
*/
protected XSSFPicture(XSSFDrawing drawing, CTPicture ctPicture){
this.drawing = drawing;
this.ctPicture = ctPicture;
}
/**
* Returns a prototype that is used to construct new shapes
*
* @return a prototype that is used to construct new shapes
*/
protected static CTPicture prototype(){
if(prototype == null) {
CTPicture pic = CTPicture.Factory.newInstance();
CTPictureNonVisual nvpr = pic.addNewNvPicPr();
CTNonVisualDrawingProps nvProps = nvpr.addNewCNvPr();
nvProps.setId(1);
nvProps.setName("Picture 1");
nvProps.setDescr("Picture");
CTNonVisualPictureProperties nvPicProps = nvpr.addNewCNvPicPr();
nvPicProps.addNewPicLocks().setNoChangeAspect(true);
CTBlipFillProperties blip = pic.addNewBlipFill();
blip.addNewBlip().setEmbed("");
blip.addNewStretch().addNewFillRect();
CTShapeProperties sppr = pic.addNewSpPr();
CTTransform2D t2d = sppr.addNewXfrm();
CTPositiveSize2D ext = t2d.addNewExt();
//should be original picture width and height expressed in EMUs
ext.setCx(0);
ext.setCy(0);
CTPoint2D off = t2d.addNewOff();
off.setX(0);
off.setY(0);
CTPresetGeometry2D prstGeom = sppr.addNewPrstGeom();
prstGeom.setPrst(STShapeType.RECT);
prstGeom.addNewAvLst();
prototype = pic;
}
return prototype;
}
/**
* Link this shape with the picture data
*
* @param rel relationship referring the picture data
*/
protected void setPictureReference(PackageRelationship rel){
ctPicture.getBlipFill().getBlip().setEmbed(rel.getId());
}
/**
* Return the underlying CTPicture bean that holds all properties for this picture
*
* @return the underlying CTPicture bean
*/
@Internal
public CTPicture getCTPicture(){
return ctPicture;
}
/**
* Reset the image to the original size.
*
*
* Please note, that this method works correctly only for workbooks
* with the default font size (Calibri 11pt for .xlsx).
* If the default font is changed the resized image can be streched vertically or horizontally.
*
*/
public void resize(){
resize(1.0);
}
/**
* Reset the image to the original size.
*
* Please note, that this method works correctly only for workbooks
* with the default font size (Calibri 11pt for .xlsx).
* If the default font is changed the resized image can be streched vertically or horizontally.
*
*
* @param scale the amount by which image dimensions are multiplied relative to the original size.
* resize(1.0) sets the original size, resize(0.5) resize to 50% of the original,
* resize(2.0) resizes to 200% of the original.
*/
public void resize(double scale){
XSSFClientAnchor anchor = (XSSFClientAnchor)getAnchor();
XSSFClientAnchor pref = getPreferredSize(scale);
int row2 = anchor.getRow1() + (pref.getRow2() - pref.getRow1());
int col2 = anchor.getCol1() + (pref.getCol2() - pref.getCol1());
anchor.setCol2(col2);
anchor.setDx1(0);
anchor.setDx2(pref.getDx2());
anchor.setRow2(row2);
anchor.setDy1(0);
anchor.setDy2(pref.getDy2());
}
/**
* Calculate the preferred size for this picture.
*
* @return XSSFClientAnchor with the preferred size for this image
*/
public XSSFClientAnchor getPreferredSize(){
return getPreferredSize(1);
}
/**
* Calculate the preferred size for this picture.
*
* @param scale the amount by which image dimensions are multiplied relative to the original size.
* @return XSSFClientAnchor with the preferred size for this image
*/
public XSSFClientAnchor getPreferredSize(double scale){
XSSFClientAnchor anchor = (XSSFClientAnchor)getAnchor();
XSSFPictureData data = getPictureData();
Dimension size = getImageDimension(data.getPackagePart(), data.getPictureType());
double scaledWidth = size.getWidth() * scale;
double scaledHeight = size.getHeight() * scale;
float w = 0;
int col2 = anchor.getCol1();
int dx2 = 0;
for (;;) {
w += getColumnWidthInPixels(col2);
if(w > scaledWidth) break;
col2++;
}
if(w > scaledWidth) {
double cw = getColumnWidthInPixels(col2 );
double delta = w - scaledWidth;
dx2 = (int)(EMU_PER_PIXEL*(cw-delta));
}
anchor.setCol2(col2);
anchor.setDx2(dx2);
double h = 0;
int row2 = anchor.getRow1();
int dy2 = 0;
for (;;) {
h += getRowHeightInPixels(row2);
if(h > scaledHeight) break;
row2++;
}
if(h > scaledHeight) {
double ch = getRowHeightInPixels(row2);
double delta = h - scaledHeight;
dy2 = (int)(EMU_PER_PIXEL*(ch-delta));
}
anchor.setRow2(row2);
anchor.setDy2(dy2);
CTPositiveSize2D size2d = ctPicture.getSpPr().getXfrm().getExt();
size2d.setCx((long)(scaledWidth*EMU_PER_PIXEL));
size2d.setCy((long)(scaledHeight*EMU_PER_PIXEL));
return anchor;
}
private float getColumnWidthInPixels(int columnIndex){
XSSFSheet sheet = (XSSFSheet)getDrawing().getParent();
CTCol col = sheet.getColumnHelper().getColumn(columnIndex, false);
double numChars = col == null || !col.isSetWidth() ? DEFAULT_COLUMN_WIDTH : col.getWidth();
return (float)numChars*XSSFWorkbook.DEFAULT_CHARACTER_WIDTH;
}
private float getRowHeightInPixels(int rowIndex){
XSSFSheet sheet = (XSSFSheet)getDrawing().getParent();
XSSFRow row = sheet.getRow(rowIndex);
float height = row != null ? row.getHeightInPoints() : sheet.getDefaultRowHeightInPoints();
return height*PIXEL_DPI/POINT_DPI;
}
/**
* Return the dimension of this image
*
* @param part the package part holding raw picture data
* @param type type of the picture: {@link Workbook#PICTURE_TYPE_JPEG},
* {@link Workbook#PICTURE_TYPE_PNG} or {@link Workbook#PICTURE_TYPE_DIB}
*
* @return image dimension in pixels
*/
protected static Dimension getImageDimension(PackagePart part, int type){
try {
return ImageUtils.getImageDimension(part.getInputStream(), type);
} catch (IOException e){
//return a "singulariry" if ImageIO failed to read the image
logger.log(POILogger.WARN, e);
return new Dimension();
}
}
/**
* Return picture data for this shape
*
* @return picture data for this shape
*/
public XSSFPictureData getPictureData() {
String blipId = ctPicture.getBlipFill().getBlip().getEmbed();
return (XSSFPictureData)getDrawing().getRelationById(blipId);
}
protected CTShapeProperties getShapeProperties(){
return ctPicture.getSpPr();
}
}