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import ij.plugin.*;
import ij.*;
import ij.plugin.frame.Editor;
import javax.script.*;
/** Implements the macro editor's Macros/Evaluate JavaScript command
on Linux and Windows systems running Java 1.6 or later. This command is
implemented as a separately compilable plugin so that the ImageJ core
can continue to be compiled using Java 1.4 and Java 1.5. The JavaScript
plugin at <http://rsb.info.nih.gov/ij/plugins/download/misc/JavaScript.java>
is used to evaluate JavaScript on Macs and on systems running versions
of Java earlier than 1.6. */
public class JavaScriptEvaluator implements PlugIn, Runnable {
Thread thread;
String script;
// run script in separate thread
public void run(String script) {
if (script.equals("")) return;
if (!IJ.isJava16())
{IJ.error("Java 1.6 or later required"); return;}
this.script = script;
thread = new Thread(this, "JavaScript");
thread.setPriority(Math.max(thread.getPriority()-2, Thread.MIN_PRIORITY));
thread.start();
}
// run script in current thread
public String run(String script, String arg) {
this.script = script;
run();
return null;
}
public void run() {
try {
ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
ScriptEngine engine = scriptEngineManager.getEngineByName("ECMAScript");
if (engine == null)
{IJ.error("Could not find JavaScript engine"); return;}
engine.eval(script);
} catch(Throwable e) {
String msg = e.getMessage();
if (msg.startsWith("sun.org.mozilla.javascript.internal.EcmaError: "))
msg = msg.substring(47, msg.length());
if (msg.startsWith("sun.org.mozilla.javascript.internal.EvaluatorException"))
msg = "Error"+msg.substring(54, msg.length());
if (msg.indexOf("Macro canceled")==-1)
IJ.log(msg);
}
}
}
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