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A tool for displaying and playing SVG content using the Java2D.
/*
* SVG Salamander
* Copyright (c) 2004, Mark McKay
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Mark McKay can be contacted at [email protected]. Salamander and other
* projects can be found at http://www.kitfox.com
*
* Created on February 18, 2004, 1:49 PM
*/
package com.kitfox.svg.xml;
import com.kitfox.svg.SVGConst;
import org.w3c.dom.*;
import java.awt.*;
import java.net.*;
import java.util.*;
import java.util.regex.*;
import java.lang.reflect.*;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author Mark McKay
* @author Mark McKay
*/
public class XMLParseUtil
{
static final Matcher fpMatch = Pattern.compile("([-+]?((\\d*\\.\\d+)|(\\d+))([eE][+-]?\\d+)?)(\\%|in|cm|mm|pt|pc|px|em|ex)?").matcher("");
static final Matcher intMatch = Pattern.compile("[-+]?\\d+").matcher("");
static final Matcher quoteMatch = Pattern.compile("^'|'$").matcher("");
/** Creates a new instance of XMLParseUtil */
private XMLParseUtil()
{
}
/**
* Scans the tag's children and returns the first text element found
*/
public static String getTagText(Element ele)
{
NodeList nl = ele.getChildNodes();
int size = nl.getLength();
Node node = null;
int i = 0;
for (; i < size; i++)
{
node = nl.item(i);
if (node instanceof Text) break;
}
if (i == size || node == null) return null;
return ((Text)node).getData();
}
/**
* Returns the first node that is a direct child of root with the coresponding
* name. Does not search children of children.
*/
public static Element getFirstChild(Element root, String name)
{
NodeList nl = root.getChildNodes();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (ele.getTagName().equals(name)) return ele;
}
return null;
}
public static String[] parseStringList(String list)
{
// final Pattern patWs = Pattern.compile("\\s+");
final Matcher matchWs = Pattern.compile("[^\\s]+").matcher("");
matchWs.reset(list);
LinkedList matchList = new LinkedList();
while (matchWs.find())
{
matchList.add(matchWs.group());
}
String[] retArr = new String[matchList.size()];
return (String[])matchList.toArray(retArr);
}
public static boolean isDouble(String val)
{
fpMatch.reset(val);
return fpMatch.matches();
}
public static double parseDouble(String val)
{
/*
if (val == null) return 0.0;
double retVal = 0.0;
try
{ retVal = Double.parseDouble(val); }
catch (Exception e)
{}
return retVal;
*/
return findDouble(val);
}
/**
* Searches the given string for the first floating point number it contains,
* parses and returns it.
*/
public synchronized static double findDouble(String val)
{
if (val == null) return 0;
fpMatch.reset(val);
try
{
if (!fpMatch.find()) return 0;
}
catch (StringIndexOutOfBoundsException e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
"XMLParseUtil: regex parse problem: '" + val + "'", e);
}
val = fpMatch.group(1);
//System.err.println("Parsing " + val);
double retVal = 0;
try
{
retVal = Double.parseDouble(val);
float pixPerInch;
try {
pixPerInch = (float)Toolkit.getDefaultToolkit().getScreenResolution();
}
catch (NoClassDefFoundError err)
{
//Default value for headless X servers
pixPerInch = 72;
}
final float inchesPerCm = .3936f;
final String units = fpMatch.group(6);
if ("%".equals(units)) retVal /= 100;
else if ("in".equals(units))
{
retVal *= pixPerInch;
}
else if ("cm".equals(units))
{
retVal *= inchesPerCm * pixPerInch;
}
else if ("mm".equals(units))
{
retVal *= inchesPerCm * pixPerInch * .1f;
}
else if ("pt".equals(units))
{
retVal *= (1f / 72f) * pixPerInch;
}
else if ("pc".equals(units))
{
retVal *= (1f / 6f) * pixPerInch;
}
}
catch (Exception e)
{}
return retVal;
}
/**
* Scans an input string for double values. For each value found, places
* in a list. This method regards any characters not part of a floating
* point value to be seperators. Thus this will parse whitespace seperated,
* comma seperated, and many other separation schemes correctly.
*/
public synchronized static double[] parseDoubleList(String list)
{
if (list == null) return null;
fpMatch.reset(list);
LinkedList doubList = new LinkedList();
while (fpMatch.find())
{
String val = fpMatch.group(1);
doubList.add(Double.valueOf(val));
}
double[] retArr = new double[doubList.size()];
Iterator it = doubList.iterator();
int idx = 0;
while (it.hasNext())
{
retArr[idx++] = ((Double)it.next()).doubleValue();
}
return retArr;
}
public static float parseFloat(String val)
{
/*
if (val == null) return 0f;
float retVal = 0f;
try
{ retVal = Float.parseFloat(val); }
catch (Exception e)
{}
return retVal;
*/
return findFloat(val);
}
/**
* Searches the given string for the first floating point number it contains,
* parses and returns it.
*/
public synchronized static float findFloat(String val)
{
if (val == null) return 0f;
fpMatch.reset(val);
if (!fpMatch.find()) return 0f;
val = fpMatch.group(1);
//System.err.println("Parsing " + val);
float retVal = 0f;
try
{
retVal = Float.parseFloat(val);
String units = fpMatch.group(6);
if ("%".equals(units)) retVal /= 100;
}
catch (Exception e)
{}
return retVal;
}
public synchronized static float[] parseFloatList(String list)
{
if (list == null) return null;
fpMatch.reset(list);
LinkedList floatList = new LinkedList();
while (fpMatch.find())
{
String val = fpMatch.group(1);
floatList.add(Float.valueOf(val));
}
float[] retArr = new float[floatList.size()];
Iterator it = floatList.iterator();
int idx = 0;
while (it.hasNext())
{
retArr[idx++] = ((Float)it.next()).floatValue();
}
return retArr;
}
public static int parseInt(String val)
{
if (val == null) return 0;
int retVal = 0;
try
{ retVal = Integer.parseInt(val); }
catch (Exception e)
{}
return retVal;
}
/**
* Searches the given string for the first integer point number it contains,
* parses and returns it.
*/
public static int findInt(String val)
{
if (val == null) return 0;
intMatch.reset(val);
if (!intMatch.find()) return 0;
val = intMatch.group();
//System.err.println("Parsing " + val);
int retVal = 0;
try
{ retVal = Integer.parseInt(val); }
catch (Exception e)
{}
return retVal;
}
public static int[] parseIntList(String list)
{
if (list == null) return null;
intMatch.reset(list);
LinkedList intList = new LinkedList();
while (intMatch.find())
{
String val = intMatch.group();
intList.add(Integer.valueOf(val));
}
int[] retArr = new int[intList.size()];
Iterator it = intList.iterator();
int idx = 0;
while (it.hasNext())
{
retArr[idx++] = ((Integer)it.next()).intValue();
}
return retArr;
}
/*
public static int parseHex(String val)
{
int retVal = 0;
for (int i = 0; i < val.length(); i++)
{
retVal <<= 4;
char ch = val.charAt(i);
if (ch >= '0' && ch <= '9')
{
retVal |= ch - '0';
}
else if (ch >= 'a' && ch <= 'z')
{
retVal |= ch - 'a' + 10;
}
else if (ch >= 'A' && ch <= 'Z')
{
retVal |= ch - 'A' + 10;
}
else throw new RuntimeException();
}
return retVal;
}
*/
/**
* The input string represents a ratio. Can either be specified as a
* double number on the range of [0.0 1.0] or as a percentage [0% 100%]
*/
public static double parseRatio(String val)
{
if (val == null || val.equals("")) return 0.0;
if (val.charAt(val.length() - 1) == '%')
{
parseDouble(val.substring(0, val.length() - 1));
}
return parseDouble(val);
}
public static NumberWithUnits parseNumberWithUnits(String val)
{
if (val == null) return null;
return new NumberWithUnits(val);
}
/*
public static Color parseColor(String val)
{
Color retVal = null;
if (val.charAt(0) == '#')
{
String hexStrn = val.substring(1);
if (hexStrn.length() == 3)
{
hexStrn = "" + hexStrn.charAt(0) + hexStrn.charAt(0) + hexStrn.charAt(1) + hexStrn.charAt(1) + hexStrn.charAt(2) + hexStrn.charAt(2);
}
int hexVal = parseHex(hexStrn);
retVal = new Color(hexVal);
}
else
{
final Matcher rgbMatch = Pattern.compile("rgb\\((\\d+),(\\d+),(\\d+)\\)", Pattern.CASE_INSENSITIVE).matcher("");
rgbMatch.reset(val);
if (rgbMatch.matches())
{
int r = Integer.parseInt(rgbMatch.group(1));
int g = Integer.parseInt(rgbMatch.group(2));
int b = Integer.parseInt(rgbMatch.group(3));
retVal = new Color(r, g, b);
}
else
{
Color lookupCol = ColorTable.instance().lookupColor(val);
if (lookupCol != null) retVal = lookupCol;
}
}
return retVal;
}
*/
/**
* Parses the given attribute of this tag and returns it as a String.
*/
public static String getAttribString(Element ele, String name)
{
return ele.getAttribute(name);
}
/**
* Parses the given attribute of this tag and returns it as an int.
*/
public static int getAttribInt(Element ele, String name)
{
String sval = ele.getAttribute(name);
int val = 0;
try { val = Integer.parseInt(sval); } catch (Exception e) {}
return val;
}
/**
* Parses the given attribute of this tag as a hexadecimal encoded string and
* returns it as an int
*/
public static int getAttribIntHex(Element ele, String name)
{
String sval = ele.getAttribute(name);
int val = 0;
try { val = Integer.parseInt(sval, 16); } catch (Exception e) {}
return val;
}
/**
* Parses the given attribute of this tag and returns it as a float
*/
public static float getAttribFloat(Element ele, String name)
{
String sval = ele.getAttribute(name);
float val = 0.0f;
try { val = Float.parseFloat(sval); } catch (Exception e) {}
return val;
}
/**
* Parses the given attribute of this tag and returns it as a double.
*/
public static double getAttribDouble(Element ele, String name)
{
String sval = ele.getAttribute(name);
double val = 0.0;
try { val = Double.parseDouble(sval); } catch (Exception e) {}
return val;
}
/**
* Parses the given attribute of this tag and returns it as a boolean.
* Essentially compares the lower case textual value to the string "true"
*/
public static boolean getAttribBoolean(Element ele, String name)
{
String sval = ele.getAttribute(name);
return sval.toLowerCase().equals("true");
}
public static URL getAttribURL(Element ele, String name, URL docRoot)
{
String sval = ele.getAttribute(name);
try
{
return new URL(docRoot, sval);
}
catch (Exception e)
{
return null;
}
}
/**
* Returns the first ReadableXMLElement with the given name
*/
public static ReadableXMLElement getElement(Class classType, Element root, String name, URL docRoot)
{
if (root == null) return null;
//Do not process if not a LoadableObject
if (!ReadableXMLElement.class.isAssignableFrom(classType))
{
return null;
}
NodeList nl = root.getChildNodes();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (!ele.getTagName().equals(name)) continue;
ReadableXMLElement newObj = null;
try
{
newObj = (ReadableXMLElement)classType.newInstance();
}
catch (Exception e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING, null, e);
continue;
}
newObj.read(ele, docRoot);
if (newObj == null) continue;
return newObj;
}
return null;
}
/**
* Returns a HashMap of nodes that are children of root. All nodes will
* be of class classType and have a tag name of 'name'. 'key' is
* an attribute of tag 'name' who's string value will be used as the key
* in the HashMap
*/
public static HashMap getElementHashMap(Class classType, Element root, String name, String key, URL docRoot)
{
if (root == null) return null;
//Do not process if not a LoadableObject
if (!ReadableXMLElement.class.isAssignableFrom(classType))
{
return null;
}
HashMap retMap = new HashMap();
NodeList nl = root.getChildNodes();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (!ele.getTagName().equals(name)) continue;
ReadableXMLElement newObj = null;
try
{
newObj = (ReadableXMLElement)classType.newInstance();
}
catch (Exception e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING, null, e);
continue;
}
newObj.read(ele, docRoot);
if (newObj == null) continue;
String keyVal = getAttribString(ele, key);
retMap.put(keyVal, newObj);
}
return retMap;
}
public static HashSet getElementHashSet(Class classType, Element root, String name, URL docRoot)
{
if (root == null) return null;
//Do not process if not a LoadableObject
if (!ReadableXMLElement.class.isAssignableFrom(classType))
{
return null;
}
HashSet retSet = new HashSet();
NodeList nl = root.getChildNodes();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (!ele.getTagName().equals(name)) continue;
ReadableXMLElement newObj = null;
try
{
newObj = (ReadableXMLElement)classType.newInstance();
}
catch (Exception e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING, null, e);
continue;
}
newObj.read(ele, docRoot);
if (newObj == null)
{
continue;
}
retSet.add(newObj);
}
return retSet;
}
public static LinkedList getElementLinkedList(Class classType, Element root, String name, URL docRoot)
{
if (root == null) return null;
//Do not process if not a LoadableObject
if (!ReadableXMLElement.class.isAssignableFrom(classType))
{
return null;
}
NodeList nl = root.getChildNodes();
LinkedList elementCache = new LinkedList();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (!ele.getTagName().equals(name)) continue;
ReadableXMLElement newObj = null;
try
{
newObj = (ReadableXMLElement)classType.newInstance();
}
catch (Exception e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING, null, e);
continue;
}
newObj.read(ele, docRoot);
elementCache.addLast(newObj);
}
return elementCache;
}
public static Object[] getElementArray(Class classType, Element root, String name, URL docRoot)
{
if (root == null) return null;
//Do not process if not a LoadableObject
if (!ReadableXMLElement.class.isAssignableFrom(classType))
{
return null;
}
LinkedList elementCache = getElementLinkedList(classType, root, name, docRoot);
Object[] retArr = (Object[])Array.newInstance(classType, elementCache.size());
return elementCache.toArray(retArr);
}
/**
* Takes a number of tags of name 'name' that are children of 'root', and
* looks for attributes of 'attrib' on them. Converts attributes to an
* int and returns in an array.
*/
public static int[] getElementArrayInt(Element root, String name, String attrib)
{
if (root == null) return null;
NodeList nl = root.getChildNodes();
LinkedList elementCache = new LinkedList();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (!ele.getTagName().equals(name)) continue;
String valS = ele.getAttribute(attrib);
int eleVal = 0;
try { eleVal = Integer.parseInt(valS); }
catch (Exception e) {}
elementCache.addLast(new Integer(eleVal));
}
int[] retArr = new int[elementCache.size()];
Iterator it = elementCache.iterator();
int idx = 0;
while (it.hasNext())
{
retArr[idx++] = it.next().intValue();
}
return retArr;
}
/**
* Takes a number of tags of name 'name' that are children of 'root', and
* looks for attributes of 'attrib' on them. Converts attributes to an
* int and returns in an array.
*/
public static String[] getElementArrayString(Element root, String name, String attrib)
{
if (root == null) return null;
NodeList nl = root.getChildNodes();
LinkedList elementCache = new LinkedList();
int size = nl.getLength();
for (int i = 0; i < size; i++)
{
Node node = nl.item(i);
if (!(node instanceof Element)) continue;
Element ele = (Element)node;
if (!ele.getTagName().equals(name)) continue;
String valS = ele.getAttribute(attrib);
elementCache.addLast(valS);
}
String[] retArr = new String[elementCache.size()];
Iterator it = elementCache.iterator();
int idx = 0;
while (it.hasNext())
{
retArr[idx++] = it.next();
}
return retArr;
}
/**
* Takes a CSS style string and retursn a hash of them.
* @param styleString - A CSS formatted string of styles. Eg,
* "font-size:12;fill:#d32c27;fill-rule:evenodd;stroke-width:1pt;"
*/
public static HashMap parseStyle(String styleString) {
return parseStyle(styleString, new HashMap());
}
/**
* Takes a CSS style string and returns a hash of them.
* @param styleString - A CSS formatted string of styles. Eg,
* "font-size:12;fill:#d32c27;fill-rule:evenodd;stroke-width:1pt;"
* @param map - A map to which these styles will be added
*/
public static HashMap parseStyle(String styleString, HashMap map) {
final Pattern patSemi = Pattern.compile(";");
String[] styles = patSemi.split(styleString);
for (int i = 0; i < styles.length; i++)
{
if (styles[i].length() == 0)
{
continue;
}
int colon = styles[i].indexOf(':');
if (colon == -1)
{
continue;
}
String key = styles[i].substring(0, colon).trim();
String value = quoteMatch.reset(styles[i].substring(colon + 1).trim()).replaceAll("");
map.put(key, new StyleAttribute(key, value));
}
return map;
}
}