package org.newdawn.slick.svg;
import java.util.Properties;
import org.newdawn.slick.Color;
/**
* A set of data about a shape that doesn't fit into it's geometric
* configuration.
*
* @author kevin
*/
public class NonGeometricData {
/** The ID of the figure */
public static final String ID = "id";
/** The fill type */
public static final String FILL = "fill";
/** The stroke type */
public static final String STROKE = "stroke";
/** The alpha value for filling */
public static final String OPACITY = "opacity";
/** The width of the line to draw */
public static final String STROKE_WIDTH = "stroke-width";
/** The mitre of the line to draw */
public static final String STROKE_MITERLIMIT = "stroke-miterlimit";
/** The dash definition of the line to draw */
public static final String STROKE_DASHARRAY = "stroke-dasharray";
/** The offset into the dash definition of the line to draw */
public static final String STROKE_DASHOFFSET = "stroke-dashoffset";
/** The alpha value for drawing */
public static final String STROKE_OPACITY = "stroke-opacity";
/** Value indicating that no settings has been specified */
public static final String NONE = "none";
/** The meta data stored for the figure */
private String metaData = "";
/** The attributes stored for the figure */
private Properties props = new Properties();
/**
* Create a set of non-geometric data for a figure
*
* @param metaData The meta data (either label or id) for the figure
*/
public NonGeometricData(String metaData) {
this.metaData = metaData;
addAttribute(STROKE_WIDTH, "1");
}
/**
* Morph the color from a string
*
* @param str The string to morph
* @return The new color string
*/
private String morphColor(String str) {
if (str.equals("")) {
return "#000000";
}
if (str.equals("white")) {
return "#ffffff";
}
if (str.equals("black")) {
return "#000000";
}
return str;
}
/**
* Add a configured style attribute into the data set
*
* @param attribute The attribute to add
* @param value The value to assign
*/
public void addAttribute(String attribute, String value) {
if (value == null) {
value = "";
}
if (attribute.equals(FILL) ) {
value = morphColor(value);
}
if (attribute.equals(STROKE_OPACITY)) {
if (value.equals("0")) {
props.setProperty(STROKE, "none");
}
}
if (attribute.equals(STROKE_WIDTH)) {
if (value.equals("")) {
value = "1";
}
if (value.endsWith("px")) {
value = value.substring(0,value.length()-2);
}
}
if (attribute.equals(STROKE)) {
if ("none".equals(props.getProperty(STROKE))) {
return;
}
value = morphColor(value);
}
props.setProperty(attribute, value);
}
/**
* Check if a given attribute is in colour format
*
* @param attribute The attribute to check
* @return True if the attirbute value is in colour format
*/
public boolean isColor(String attribute) {
return getAttribute(attribute).startsWith("#");
}
/**
* Get the meta data assigned to the figure. Either the label or
* the id value.
*
* @return The meta data assigned to the figure
*/
public String getMetaData() {
return metaData;
}
/**
* Get the attribtue value for a given attribute
*
* @param attribute The attribute whose value should be obtained
* @return The value for the given attribute
*/
public String getAttribute(String attribute) {
return props.getProperty(attribute);
}
/**
* Get an attribute value converted to a color. isColor should first be checked
*
* @param attribute The attribute whose value should be interpreted as a color
* @return The color based on the attribute
*/
public Color getAsColor(String attribute) {
if (!isColor(attribute)) {
throw new RuntimeException("Attribute "+attribute+" is not specified as a color:"+getAttribute(attribute));
}
int col = Integer.parseInt(getAttribute(attribute).substring(1), 16);
return new Color(col);
}
/**
* Get the attribute value as a reference to another entity
*
* @param attribute The name of the attribute to retrieve
* @return The reference part of the attribute value
*/
public String getAsReference(String attribute) {
String value = getAttribute(attribute);
if (value.length() < 7) {
return "";
}
value = value.substring(5, value.length()-1);
return value;
}
/**
* Get an attribute converted to a float value
*
* @param attribute The attribute to retrieve
* @return The float value derived from the attribute
*/
public float getAsFloat(String attribute) {
String value = getAttribute(attribute);
if (value == null) {
return 0;
}
try {
return Float.parseFloat(value);
} catch (NumberFormatException e) {
throw new RuntimeException("Attribute "+attribute+" is not specified as a float:"+getAttribute(attribute));
}
}
}