/*
Copyright (c) 1998-2008 The Regents of the University of California
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*
*/
package diva.canvas.toolbox;
import java.awt.Color;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;
import diva.util.java2d.PaintedObject;
import diva.util.java2d.PaintedPath;
import diva.util.java2d.PaintedShape;
import diva.util.java2d.PaintedString;
import diva.util.java2d.Polygon2D;
import diva.util.java2d.Polyline2D;
/** A collection of utilities to help parsing graphics from strings
* and other kinds of external storage.
*
* @version $Id$
* @author John Reekie
*/
public class GraphicsParser {
// Note that this class was deprecated becase we were to use
// diva.compat.canvas instead. However, the Ptolemy sources
// do not include diva.compat.canvas, so I'm making this class
// undeprecated. -cxh 7/05
/** Create a new painted object. The element is parsed from
* two strings, the first being a representation of the element
* type, and the second being an XML-style attribute string.
* Any attributes that are not recognized will be ignored.
* Legal types and their attributes are:
*
* <ul>
* <li> <b>line</b>
* <b>coords</b>=<i>vertex-list</i>
* <b>fill</b>=<i>color</i>
* <b>width</b>=<i>integer</i>
* <li> <b>rectangle</b>
* <b>coords</b>=<i>x y width height</i>
* <b>fill</b>=<i>color</i>
* <b>outline</b>=<i>color</i>
* <b>width</b>=<i>integer</i>
* <li> <b>ellipse</b>
* <b>coords</b>=<i>x y width height</i>
* <b>fill</b>=<i>color</i>
* <b>outline</b>=<i>color</i>
* <b>width</b>=<i>integer</i>
* <li> <b>polygon</b>
* <b>coords</b>=<i>vertex-list</i>
* <b>fill</b>=<i>color</i>
* <b>outline</b>=<i>color</i>
* <b>width</b>=<i>integer</i>
* <li> <b>text</b>
* <b>coords</b>=<i>x y</i>
* <b>fill</b>=<i>color</i>
* <b>font</b>=<i>font-name</i>
* <b>size</b>=<i>int</i>
* <b>style</b>=<b>bold</b>|<b>italic</b>|<b>plain</b>
* </ul>
*/
public static PaintedObject createPaintedObject(String type,
String attributes, String content) {
Map hm = new HashMap();
hashAttributes(attributes, hm);
return createPaintedObject(type, hm, content);
}
/** Create a new painted object. The first argument is a string
* representation of the element type, and the second is a
* hash-table containing attributes of the object. Any attributes
* that are not recognized will be ignored. See the add(String,
* String) for a description of legal types and their attributes.
*
*/
public static PaintedObject createPaintedObject(String type,
Map attributes, String content) {
double[] coords = parseCoordString((String) attributes.get("coords"));
if (type.equals("rectangle")) {
PaintedShape ps = new PaintedShape(new Rectangle2D.Double(
coords[0], coords[1], coords[2], coords[3]));
processPaintedShapeAttributes(ps, attributes);
return ps;
} else if (type.equals("ellipse")) {
PaintedShape ps = new PaintedShape(new Ellipse2D.Double(coords[0],
coords[1], coords[2], coords[3]));
processPaintedShapeAttributes(ps, attributes);
return ps;
} else if (type.equals("polygon")) {
Polygon2D poly = new Polygon2D.Double();
poly.moveTo(coords[0], coords[1]);
for (int i = 2; i < coords.length; i += 2) {
poly.lineTo(coords[i], coords[i + 1]);
}
poly.closePath();
PaintedShape ps = new PaintedShape(poly);
processPaintedShapeAttributes(ps, attributes);
return ps;
} else if (type.equals("line")) {
Shape s;
if (coords.length == 4) {
s = new Line2D.Double(coords[0], coords[1], coords[2],
coords[3]);
} else {
Polyline2D poly = new Polyline2D.Double();
poly.moveTo(coords[0], coords[1]);
for (int i = 2; i < coords.length; i += 2) {
poly.lineTo(coords[i], coords[i + 1]);
}
s = poly;
}
PaintedPath pp = new PaintedPath(s);
processPaintedPathAttributes(pp, attributes);
return pp;
} else if (type.equals("text")) {
PaintedString string = new PaintedString(content);
processPaintedStringAttributes(string, attributes);
string.translate(coords[0], coords[1]);
return string;
}
return null;
}
/** Create a new painted object. The first argument is a string
* representation of the element type, and the second is a
* hash-table containing attributes of the object. Any attributes
* that are not recognized will be ignored. See the add(String,
* String) for a description of legal types and their attributes.
*/
public static PaintedObject createPaintedObject(String type, Map attributes) {
double[] coords = parseCoordString((String) attributes.get("coords"));
if (type.equals("rectangle")) {
PaintedShape ps = new PaintedShape(new Rectangle2D.Double(
coords[0], coords[1], coords[2], coords[3]));
processPaintedShapeAttributes(ps, attributes);
return ps;
} else if (type.equals("ellipse")) {
PaintedShape ps = new PaintedShape(new Ellipse2D.Double(coords[0],
coords[1], coords[2], coords[3]));
processPaintedShapeAttributes(ps, attributes);
return ps;
} else if (type.equals("polygon")) {
Polygon2D poly = new Polygon2D.Double();
poly.moveTo(coords[0], coords[1]);
for (int i = 2; i < coords.length; i += 2) {
poly.lineTo(coords[i], coords[i + 1]);
}
poly.closePath();
PaintedShape ps = new PaintedShape(poly);
processPaintedShapeAttributes(ps, attributes);
return ps;
} else if (type.equals("line")) {
Shape s;
if (coords.length == 4) {
s = new Line2D.Double(coords[0], coords[1], coords[2],
coords[3]);
} else {
Polyline2D poly = new Polyline2D.Double();
poly.moveTo(coords[0], coords[1]);
for (int i = 2; i < coords.length; i += 2) {
poly.lineTo(coords[i], coords[i + 1]);
}
s = poly;
}
PaintedPath pp = new PaintedPath(s);
processPaintedPathAttributes(pp, attributes);
return pp;
}
return null;
}
/** Given a XML-style attribute string and a hash-table, add
* each attribute and its value to the table.
*
* <P> FIXME: this sucks.
*/
public static void hashAttributes(String s, Map map) {
StreamTokenizer t = new StreamTokenizer(new StringReader(s));
t.whitespaceChars('=', '=');
t.ordinaryChars('0', '9');
t.ordinaryChar('.');
String key = "Unknown";
String val = "Unknown";
while (true) {
int ttype = 0;
try {
ttype = t.nextToken();
} catch (Exception e) {
}
if (ttype == StreamTokenizer.TT_EOF) {
break;
}
switch (ttype) {
case StreamTokenizer.TT_WORD:
key = t.sval;
break;
}
try {
ttype = t.nextToken();
} catch (Exception e) {
}
if (ttype == StreamTokenizer.TT_EOF) {
break;
}
switch (ttype) {
case StreamTokenizer.TT_WORD:
val = t.sval;
break;
}
////System.out.println(key + "=" + val);
map.put(key, val);
}
}
/** Given a string, return a color.
*/
private static Color lookupColor(String color) {
String s = color.toLowerCase();
if (s.equals("black")) {
return Color.black;
} else if (s.equals("blue")) {
return Color.blue;
} else if (s.equals("cyan")) {
return Color.cyan;
} else if (s.equals("darkgray")) {
return Color.darkGray;
} else if (s.equals("darkgrey")) {
return Color.darkGray;
} else if (s.equals("gray")) {
return Color.gray;
} else if (s.equals("grey")) {
return Color.gray;
} else if (s.equals("green")) {
return Color.green;
} else if (s.equals("lightgray")) {
return Color.lightGray;
} else if (s.equals("lightgrey")) {
return Color.lightGray;
} else if (s.equals("magenta")) {
return Color.magenta;
} else if (s.equals("orange")) {
return Color.orange;
} else if (s.equals("pink")) {
return Color.pink;
} else if (s.equals("red")) {
return Color.red;
} else if (s.equals("white")) {
return Color.white;
} else if (s.equals("yellow")) {
return Color.yellow;
} else {
return Color.black;
}
// Color c = Color.getColor(s);
// if (c == null) {
// try {
// c = Color.decode(s);
// }
// catch (Exception e) {}
// }
// if (c == null) {
// c = Color.black;
// }
// return c;
}
/** Parse a string of numbers into an array of double
*/
private static double[] parseCoordString(String s) {
double[] result = new double[4];
int i = 0;
StringTokenizer t = new StringTokenizer(s);
while (t.hasMoreTokens()) {
result[i++] = Double.parseDouble(t.nextToken());
if (i == result.length) {
double[] temp = new double[2 * result.length];
System.arraycopy(result, 0, temp, 0, result.length);
result = temp;
}
}
// Yawn! now we have to chop it back to size...
double[] temp = new double[i];
System.arraycopy(result, 0, temp, 0, i);
result = temp;
// Return it
return result;
}
/** Set the attributes of a PaintedShape from a hash-table
*/
private static void processPaintedShapeAttributes(PaintedShape ps,
Map attributes) {
Iterator i = attributes.entrySet().iterator();
while (i.hasNext()) {
Map.Entry entry = (Map.Entry) i.next();
String key = (String) entry.getKey();
String val = (String) entry.getValue();
////System.out.println(key + "=" + val);
if (key.equals("fill")) {
////System.out.println(lookupColor(val));
ps.fillPaint = lookupColor(val);
} else if (key.equals("outline")) {
ps.strokePaint = lookupColor(val);
} else if (key.equals("width")) {
ps.setLineWidth(Float.parseFloat(val));
}
}
}
/** Set the attributes of a PaintedPath from a hash-table
*/
private static void processPaintedPathAttributes(PaintedPath pp,
Map attributes) {
Iterator i = attributes.entrySet().iterator();
while (i.hasNext()) {
Map.Entry entry = (Map.Entry) i.next();
String key = (String) entry.getKey();
String val = (String) entry.getValue();
if (key.equals("fill")) {
pp.strokePaint = lookupColor(val);
} else if (key.equals("width")) {
pp.setLineWidth(Float.parseFloat(val));
}
}
}
/** Set the attributes of a PaintedString from a hash-table
*/
private static void processPaintedStringAttributes(PaintedString pp,
Map attributes) {
Iterator i = attributes.entrySet().iterator();
while (i.hasNext()) {
Map.Entry entry = (Map.Entry) i.next();
String key = (String) entry.getKey();
String val = (String) entry.getValue();
if (key.equals("font")) {
pp.setFontName(val);
} else if (key.equals("size")) {
pp.setSize(Integer.parseInt(val));
}
}
}
}