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package ij;
import ij.util.Tools;
import ij.text.TextWindow;
import ij.plugin.MacroInstaller;
import ij.plugin.frame.Recorder;
import ij.io.OpenDialog;
import java.io.*;
import java.util.*;
import java.awt.event.KeyEvent;
import java.awt.Menu;
/** Runs ImageJ menu commands in a separate thread.*/
public class Executer implements Runnable {
private static String previousCommand;
private static CommandListener listener;
private static Vector listeners = new Vector();
private String command;
private Thread thread;
/** Create an Executer to run the specified menu command
in this thread using the active image. */
public Executer(String cmd) {
command = cmd;
}
/** Create an Executer that runs the specified menu
command in a separate thread using the specified image,
or using the active image if 'imp' is null. */
public Executer(String cmd, ImagePlus imp) {
if (cmd.startsWith("Repeat")) {
command = previousCommand;
IJ.setKeyUp(KeyEvent.VK_SHIFT);
} else {
command = cmd;
if (!(cmd.equals("Undo")||cmd.equals("Close")))
previousCommand = cmd;
}
IJ.resetEscape();
thread = new Thread(this, cmd);
thread.setPriority(Math.max(thread.getPriority()-2, Thread.MIN_PRIORITY));
if (imp!=null)
WindowManager.setTempCurrentImage(thread, imp);
thread.start();
}
public void run() {
if (command==null) return;
if (listeners.size()>0) synchronized (listeners) {
for (int i=0; i<listeners.size(); i++) {
CommandListener listener = (CommandListener)listeners.elementAt(i);
command = listener.commandExecuting(command);
if (command==null) return;
}
}
try {
if (Recorder.record) {
Recorder.setCommand(command);
runCommand(command);
Recorder.saveCommand();
} else
runCommand(command);
int len = command.length();
if (command.charAt(len-1)!=']')
IJ.setKeyUp(IJ.ALL_KEYS); // set keys up except for "<", ">", "+" and "-" shortcuts
} catch(Throwable e) {
IJ.showStatus("");
IJ.showProgress(1, 1);
ImagePlus imp = WindowManager.getCurrentImage();
if (imp!=null) imp.unlock();
String msg = e.getMessage();
if (e instanceof OutOfMemoryError)
IJ.outOfMemory(command);
else if (e instanceof RuntimeException && msg!=null && msg.equals(Macro.MACRO_CANCELED))
; //do nothing
else {
CharArrayWriter caw = new CharArrayWriter();
PrintWriter pw = new PrintWriter(caw);
e.printStackTrace(pw);
String s = caw.toString();
if (IJ.isMacintosh()) {
if (s.indexOf("ThreadDeath")>0)
return;
s = Tools.fixNewLines(s);
}
int w=500, h=300;
if (s.indexOf("UnsupportedClassVersionError")!=-1) {
if (s.indexOf("version 49.0")!=-1) {
s = e + "\n \nThis plugin requires Java 1.5 or later.";
w=700; h=150;
}
if (s.indexOf("version 50.0")!=-1) {
s = e + "\n \nThis plugin requires Java 1.6 or later.";
w=700; h=150;
}
if (s.indexOf("version 51.0")!=-1) {
s = e + "\n \nThis plugin requires Java 1.7 or later.";
w=700; h=150;
}
}
if (IJ.getInstance()!=null)
new TextWindow("Exception", s, w, h);
else
IJ.log(s);
}
}
}
void runCommand(String cmd) {
Hashtable table = Menus.getCommands();
String className = (String)table.get(cmd);
if (className!=null) {
String arg = "";
if (className.endsWith("\")")) {
// extract string argument (e.g. className("arg"))
int argStart = className.lastIndexOf("(\"");
if (argStart>0) {
arg = className.substring(argStart+2, className.length()-2);
className = className.substring(0, argStart);
}
}
if (IJ.shiftKeyDown() && className.startsWith("ij.plugin.Macro_Runner") && !Menus.getShortcuts().contains("*"+cmd))
IJ.open(IJ.getDirectory("plugins")+arg);
else
IJ.runPlugIn(cmd, className, arg);
} else {
// Is this command in Plugins>Macros?
if (MacroInstaller.runMacroCommand(cmd))
return;
// Is this command a LUT name?
String path = IJ.getDirectory("luts")+cmd+".lut";
File f = new File(path);
if (f.exists()) {
String dir = OpenDialog.getLastDirectory();
IJ.open(path);
OpenDialog.setLastDirectory(dir);
} else if (!openRecent(cmd))
IJ.error("Unrecognized command: " + cmd);
}
}
/** Opens a file from the File/Open Recent menu
and returns 'true' if successful. */
boolean openRecent(String cmd) {
Menu menu = Menus.openRecentMenu;
if (menu==null) return false;
for (int i=0; i<menu.getItemCount(); i++) {
if (menu.getItem(i).getLabel().equals(cmd)) {
IJ.open(cmd);
return true;
}
}
return false;
}
/** Returns the last command executed. Returns null
if no command has been executed. */
public static String getCommand() {
return previousCommand;
}
/** Adds the specified command listener. */
public static void addCommandListener(CommandListener listener) {
listeners.addElement(listener);
}
/** Removes the specified command listener. */
public static void removeCommandListener(CommandListener listener) {
listeners.removeElement(listener);
}
}
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