org.apache.pdfbox.pdmodel.fdf.FDFAnnotationPolyline Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of pdfbox Show documentation
Show all versions of pdfbox Show documentation
The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* 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.pdfbox.pdmodel.fdf;
import java.awt.Color;
import java.io.IOException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationLine;
import org.w3c.dom.Element;
/**
* This represents a Polyline FDF annotation.
*
* @author Ben Litchfield
* @author Johanneke Lamberink
*/
public class FDFAnnotationPolyline extends FDFAnnotation
{
private static final Log LOG = LogFactory.getLog(FDFAnnotationPolyline.class);
/**
* COS Model value for SubType entry.
*/
public static final String SUBTYPE = "Polyline";
/**
* Default constructor.
*/
public FDFAnnotationPolyline()
{
super();
annot.setName(COSName.SUBTYPE, SUBTYPE);
}
/**
* Constructor.
*
* @param a An existing FDF Annotation.
*/
public FDFAnnotationPolyline(COSDictionary a)
{
super(a);
}
/**
* Constructor.
*
* @param element An XFDF element.
*
* @throws IOException If there is an error extracting information from the element.
*/
public FDFAnnotationPolyline(Element element) throws IOException
{
super(element);
annot.setName(COSName.SUBTYPE, SUBTYPE);
initVertices(element);
initStyles(element);
}
private void initVertices(Element element) throws IOException
{
XPath xpath = XPathFactory.newInstance().newXPath();
try
{
String vertices = xpath.evaluate("vertices[1]", element);
if (vertices == null || vertices.isEmpty())
{
throw new IOException("Error: missing element 'vertices'");
}
String[] verticesValues = vertices.split(",|;");
float[] values = new float[verticesValues.length];
for (int i = 0; i < verticesValues.length; i++)
{
values[i] = Float.parseFloat(verticesValues[i]);
}
setVertices(values);
}
catch (XPathExpressionException e)
{
LOG.debug("Error while evaluating XPath expression for polyline vertices");
}
}
private void initStyles(Element element)
{
String startStyle = element.getAttribute("head");
if (startStyle != null && !startStyle.isEmpty())
{
setStartPointEndingStyle(startStyle);
}
String endStyle = element.getAttribute("tail");
if (endStyle != null && !endStyle.isEmpty())
{
setEndPointEndingStyle(endStyle);
}
String color = element.getAttribute("interior-color");
if (color != null && color.length() == 7 && color.charAt(0) == '#')
{
int colorValue = Integer.parseInt(color.substring(1, 7), 16);
setInteriorColor(new Color(colorValue));
}
}
/**
* This will set the coordinates of the vertices.
*
* @param vertices array of floats [x1, y1, x2, y2, ...] vertex coordinates in default user space.
*/
public void setVertices(float[] vertices)
{
COSArray newVertices = new COSArray();
newVertices.setFloatArray(vertices);
annot.setItem(COSName.VERTICES, newVertices);
}
/**
* This will get the coordinates of the vertices.
*
* @return array of floats [x1, y1, x2, y2, ...] vertex coordinates in default user space.
*/
public float[] getVertices()
{
COSArray array = (COSArray) annot.getDictionaryObject(COSName.VERTICES);
if (array != null)
{
return array.toFloatArray();
}
else
{
return null; // Should never happen as this is a required item
}
}
/**
* This will set the line ending style for the start point, see the LE_ constants for the possible values.
*
* @param style The new style.
*/
public void setStartPointEndingStyle(String style)
{
if (style == null)
{
style = PDAnnotationLine.LE_NONE;
}
COSArray array = (COSArray) annot.getDictionaryObject(COSName.LE);
if (array == null)
{
array = new COSArray();
array.add(COSName.getPDFName(style));
array.add(COSName.getPDFName(PDAnnotationLine.LE_NONE));
annot.setItem(COSName.LE, array);
}
else
{
array.setName(0, style);
}
}
/**
* This will retrieve the line ending style for the start point, possible values shown in the LE_ constants section.
*
* @return The ending style for the start point.
*/
public String getStartPointEndingStyle()
{
String retval = PDAnnotationLine.LE_NONE;
COSArray array = (COSArray) annot.getDictionaryObject(COSName.LE);
if (array != null)
{
retval = array.getName(0);
}
return retval;
}
/**
* This will set the line ending style for the end point, see the LE_ constants for the possible values.
*
* @param style The new style.
*/
public void setEndPointEndingStyle(String style)
{
if (style == null)
{
style = PDAnnotationLine.LE_NONE;
}
COSArray array = (COSArray) annot.getDictionaryObject(COSName.LE);
if (array == null)
{
array = new COSArray();
array.add(COSName.getPDFName(PDAnnotationLine.LE_NONE));
array.add(COSName.getPDFName(style));
annot.setItem(COSName.LE, array);
}
else
{
array.setName(1, style);
}
}
/**
* This will retrieve the line ending style for the end point, possible values shown in the LE_ constants section.
*
* @return The ending style for the end point.
*/
public String getEndPointEndingStyle()
{
String retval = PDAnnotationLine.LE_NONE;
COSArray array = (COSArray) annot.getDictionaryObject(COSName.LE);
if (array != null)
{
retval = array.getName(1);
}
return retval;
}
/**
* This will set interior color of the line endings defined in the LE entry.
*
* @param color The interior color of the line endings.
*/
public void setInteriorColor(Color color)
{
COSArray array = null;
if (color != null)
{
float[] colors = color.getRGBColorComponents(null);
array = new COSArray();
array.setFloatArray(colors);
}
annot.setItem(COSName.IC, array);
}
/**
* This will retrieve the interior color of the line endings defined in the LE entry.
*
* @return object representing the color.
*/
public Color getInteriorColor()
{
Color retval = null;
COSArray array = (COSArray) annot.getDictionaryObject(COSName.IC);
if (array != null)
{
float[] rgb = array.toFloatArray();
if (rgb.length >= 3)
{
retval = new Color(rgb[0], rgb[1], rgb[2]);
}
}
return retval;
}
}