/**
* Copyright (c) 2006-2013, JGraph Ltd
*/
package com.mxgraph.io;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import com.mxgraph.util.mxUtils;
import com.mxgraph.view.mxStylesheet;
/**
* Codec for mxStylesheets. This class is created and registered
* dynamically at load time and used implicitely via mxCodec
* and the mxCodecRegistry.
*/
public class mxStylesheetCodec extends mxObjectCodec
{
/**
* Constructs a new model codec.
*/
public mxStylesheetCodec()
{
this(new mxStylesheet());
}
/**
* Constructs a new stylesheet codec for the given template.
*/
public mxStylesheetCodec(Object template)
{
this(template, null, null, null);
}
/**
* Constructs a new model codec for the given arguments.
*/
public mxStylesheetCodec(Object template, String[] exclude,
String[] idrefs, Map<String, String> mapping)
{
super(template, exclude, idrefs, mapping);
}
/**
* Encodes the given mxStylesheet.
*/
public Node encode(mxCodec enc, Object obj)
{
Element node = enc.document.createElement(getName());
if (obj instanceof mxStylesheet)
{
mxStylesheet stylesheet = (mxStylesheet) obj;
Iterator<Map.Entry<String, Map<String, Object>>> it = stylesheet
.getStyles().entrySet().iterator();
while (it.hasNext())
{
Map.Entry<String, Map<String, Object>> entry = it.next();
Element styleNode = enc.document.createElement("add");
String stylename = entry.getKey();
styleNode.setAttribute("as", stylename);
Map<String, Object> style = entry.getValue();
Iterator<Map.Entry<String, Object>> it2 = style.entrySet()
.iterator();
while (it2.hasNext())
{
Map.Entry<String, Object> entry2 = it2.next();
Element entryNode = enc.document.createElement("add");
entryNode.setAttribute("as",
String.valueOf(entry2.getKey()));
entryNode.setAttribute("value", getStringValue(entry2));
styleNode.appendChild(entryNode);
}
if (styleNode.getChildNodes().getLength() > 0)
{
node.appendChild(styleNode);
}
}
}
return node;
}
/**
* Returns the string for encoding the given value.
*/
protected String getStringValue(Map.Entry<String, Object> entry)
{
if (entry.getValue() instanceof Boolean)
{
return ((Boolean) entry.getValue()) ? "1" : "0";
}
return entry.getValue().toString();
}
/**
* Decodes the given mxStylesheet.
*/
public Object decode(mxCodec dec, Node node, Object into)
{
Object obj = null;
if (node instanceof Element)
{
String id = ((Element) node).getAttribute("id");
obj = dec.objects.get(id);
if (obj == null)
{
obj = into;
if (obj == null)
{
obj = cloneTemplate(node);
}
if (id != null && id.length() > 0)
{
dec.putObject(id, obj);
}
}
node = node.getFirstChild();
while (node != null)
{
if (!processInclude(dec, node, obj)
&& node.getNodeName().equals("add")
&& node instanceof Element)
{
String as = ((Element) node).getAttribute("as");
if (as != null && as.length() > 0)
{
String extend = ((Element) node).getAttribute("extend");
Map<String, Object> style = (extend != null) ? ((mxStylesheet) obj)
.getStyles().get(extend) : null;
if (style == null)
{
style = new Hashtable<String, Object>();
}
else
{
style = new Hashtable<String, Object>(style);
}
Node entry = node.getFirstChild();
while (entry != null)
{
if (entry instanceof Element)
{
Element entryElement = (Element) entry;
String key = entryElement.getAttribute("as");
if (entry.getNodeName().equals("add"))
{
String text = entry.getTextContent();
Object value = null;
if (text != null && text.length() > 0)
{
value = mxUtils.eval(text);
}
else
{
value = entryElement
.getAttribute("value");
}
if (value != null)
{
style.put(key, value);
}
}
else if (entry.getNodeName().equals("remove"))
{
style.remove(key);
}
}
entry = entry.getNextSibling();
}
((mxStylesheet) obj).putCellStyle(as, style);
}
}
node = node.getNextSibling();
}
}
return obj;
}
}