package com.tom_roush.pdfbox.pdmodel.fdf;
import android.util.Log;
import com.tom_roush.pdfbox.cos.COSArray;
import com.tom_roush.pdfbox.cos.COSDictionary;
import com.tom_roush.pdfbox.cos.COSName;
import com.tom_roush.pdfbox.pdmodel.interactive.annotation.PDAnnotationLine;
import com.tom_roush.pdfbox.util.awt.AWTColor;
import org.w3c.dom.Element;
import java.io.IOException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
/**
* This represents a Polyline FDF annotation.
*
* @author Ben Litchfield
*/
public class FDFAnnotationPolyline extends FDFAnnotation
{
/**
* 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, NumberFormatException
{
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.d("PdfBox-Android",
"Error while evaluating XPath expression for polyline vertices");
}
}
private void initStyles(Element element) throws NumberFormatException
{
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 AWTColor(colorValue));
}
}
/**
* This will set the coordinates of the 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 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(AWTColor 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 AWTColor getInteriorColor()
{
AWTColor retval = null;
COSArray array = (COSArray) annot.getDictionaryObject(COSName.IC);
if (array != null)
{
float[] rgb = array.toFloatArray();
if (rgb.length >= 3)
{
retval = new AWTColor(rgb[0], rgb[1], rgb[2]);
}
}
return retval;
}
}