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package org.kde.javascript;
import java.applet.Applet;
import org.kde.kjas.server.KJASAppletContext;
import org.kde.kjas.server.Main;
public class JSObject extends netscape.javascript.JSObject {
public String returnvalue = null;
public Thread thread;
private String jsobject;
private int id;
private Applet applet;
private String appletID = null;
/* JavaScript code:
* __lc=[[JS objects],call func(index,script,appletname,isglobal)]
*/
private final static String decls = "if(!window.__lc) window.__lc=[[window],function(i,s,a,g){var v;var len=window.__lc[0].length;if(i>=len)v='E unknown object';else{var r;try{r=eval((g?'':'window.__lc[0][i]')+s);}catch(e){v='E '+e;r='E ';}finally{var t=typeof r;if(t=='undefined')v='V ';else if(t=='number')v='N '+r;else if(t=='string'){if(r!='E ')v='S '+r;}else{window.__lc[0][len]=r;v=''+len+' '+(r==window.__lc?'[array]':r);}}}a.__lc_ret=v},0]";
public JSObject(Applet a, String name, int _id) {
Main.info("JSObject.ctor: " + name);
jsobject = new String(name);
applet = a;
id = _id;
KJASAppletContext kc = (KJASAppletContext)applet.getAppletContext();
appletID = kc.getAppletID(a);
if (id == 0) {
kc.evaluateJavaScript(decls, appletID, null);
}
}
int getId() {
return id;
}
private String escapeString(String string) {
StringBuffer sb = new StringBuffer();
int idx = 0;
boolean cr = false;
char [] chars = string.toCharArray();
while (idx < chars.length) {
if (cr && chars[idx] != '\n') {
cr = false;
sb.append("\\n");
}
switch (chars[idx]) {
case '\\':
sb.append("\\\\");
break;
case '"':
sb.append("\\\"");
break;
case '\n':
cr = false;
sb.append("\\n");
break;
case '\r':
cr = true;
break;
default:
sb.append(chars[idx]);
}
idx++;
}
if (cr)
sb.append("\\n");
return sb.toString();
}
private Object evaluate(String script, boolean global) throws netscape.javascript.JSException {
Main.info("evaluate (\"" + script + "\")");
KJASAppletContext kc = (KJASAppletContext) applet.getAppletContext();
//String appletname = kc.getAppletName(appletID);
thread = Thread.currentThread();
if (!kc.evaluateJavaScript("window.__lc[1](" + id + ",\"" + escapeString(script) + "\",this" + (global ? ",true)" : ")"), appletID, this)) {
Main.debug("evaluate on not active applet");
return null;
}
boolean timedout = true;
try {
Thread.sleep(30000);
} catch (InterruptedException ex) {
timedout = false;
}
thread = null;
if (timedout || returnvalue == null)
return null;
/* lets see what we've got */
String retval = returnvalue;
int pos = retval.indexOf(' ');
String type = retval.substring(0, pos);
if (type.equals("V")) // Void
return null;
String value = retval.substring(pos+1);
if (type.equals("E")) // Error
throw new netscape.javascript.JSException("Script error: " + value);
Main.info("value=" + value + " (type=" + type + ")");
if (type.equals("N")) // Number
return new Double(value);
if (type.equals("S")) // String
return value;
/* Is it an applet? */
if (value.startsWith("[object APPLET ref=")) {
int p1 = value.indexOf('=');
int p2 = value.indexOf(']', p1+1);
int applethashcode = Integer.parseInt(value.substring(p1+1, p2));
java.util.Enumeration e = kc.getApplets();
while (e.hasMoreElements()) {
Applet app = (Applet) e.nextElement();
if (app.hashCode() == applethashcode)
return app;
}
return null;
}
/* Is it a Java object then? */
if (value.startsWith("[object ") && value.indexOf("ref=") > 0) {
int p1 = value.indexOf("ref=");
int p2 = value.indexOf(']', p1+4);
int objecthashcode = Integer.parseInt(value.substring(p1+4, p2));
return kc.getJSReferencedObject(applet, objecthashcode);
}
/* Ok, make it a JSObject */
return new JSObject(applet, value, Integer.parseInt(type));
}
private String convertValueJ2JS(Object o) {
if (o == null)
return new String("null");
if (o instanceof java.lang.Number || o instanceof java.lang.Boolean)
return o.toString();
if (o instanceof netscape.javascript.JSObject)
return new String("window.__lc[0][" + ((JSObject)o).getId() + "]");
return new String("\"" + escapeString(o.toString()) + "\"");
}
public Object call(String func, Object [] args) throws netscape.javascript.JSException {
Main.info("JSObject.call: " + jsobject + "." + func);
String script = new String("." + func + "(");
for (int i = 0; args != null && i < args.length; i++)
script += (i > 0 ? "," : "") + convertValueJ2JS(args[i]);
script += ")";
return evaluate(script, false);
}
public Object eval(String s) throws netscape.javascript.JSException {
return evaluate(s, true);
}
public boolean equals(Object obj) {
Main.info("JSObject.equals");
return super.equals(obj);
}
public Object getMember(String name) throws netscape.javascript.JSException {
Main.info("JSObject.getMember: " + jsobject + "." + name);
return evaluate("." + name, false);
}
public void setMember(String name, java.lang.Object o) throws netscape.javascript.JSException {
Main.info("JSObject.setMember: " + jsobject + "." + name);
evaluate("." + name + "=" + convertValueJ2JS(o), false);
}
public void removeMember(String name) throws netscape.javascript.JSException {
Main.info("JSObject.removeMember: " + jsobject + "." + name);
evaluate("." + name + "=null", false);
}
/* get array element; JS: this[index] */
public Object getSlot(int index)throws netscape.javascript.JSException {
Main.info("JSObject.getSlot: " + jsobject + "[" + index + "]");
return evaluate("[" + index + "]", false);
}
public void setSlot(int index, Object o) throws netscape.javascript.JSException {
Main.info("JSObject.setSlot: " + jsobject + "[" + index + "]");
evaluate("[" + index + "]=" + convertValueJ2JS(o), false);
}
public String toString(){
Main.info("JSObject.toString: " + jsobject);
return new String(jsobject);
}
public static JSObject getWindow(Applet a, int dummy) {
Main.info("JSObject.getWindow");
return new JSObject(a, "[WINDOW]", 0);
}
}
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