JAL-4356 release date for 2.11.3.3 is 22nd May 2025

[jalview.git] / src / jalview / javascript / JSFunctionExec.java

diff --git a/src/jalview/javascript/JSFunctionExec.java b/src/jalview/javascript/JSFunctionExec.java
index 6ab0865..32f1972 100644 (file)
--- a/src/jalview/javascript/JSFunctionExec.java
+++ b/src/jalview/javascript/JSFunctionExec.java
@@ -1,43 +1,77 @@
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
 package jalview.javascript;
 
+import jalview.bin.JalviewLite;
+
 import java.net.URL;
 import java.util.Vector;
 
-import netscape.javascript.JSException;
 import netscape.javascript.JSObject;
-import jalview.bin.JalviewLite;
 
 public class JSFunctionExec implements Runnable
 {
-  JalviewLite jvlite;
+  public JalviewLite jvlite;
 
   public JSFunctionExec(JalviewLite applet)
   {
     jvlite = applet;
+
+    jsExecQueue = jvlite.getJsExecQueue();
+    jvlite.setExecutor(this);
   }
 
-  private static Vector jsExecQueue;
+  private Vector jsExecQueue;
 
-  private static Thread executor = null;
+  private Thread executor = null;
 
-  public static void stopQueue()
+  public void stopQueue()
   {
     if (jsExecQueue != null)
     {
+      Vector<JSFunctionExec> q = null;
       synchronized (jsExecQueue)
       {
-        Vector q = jsExecQueue;
-        q.removeAllElements();
+        q = jsExecQueue;
         jsExecQueue = null;
+      }
+      if (q != null)
+      {
+        for (JSFunctionExec jx : q)
+        {
+          jx.jvlite = null;
+
+        }
+        q.removeAllElements();
         synchronized (q)
         {
           q.notifyAll();
         }
       }
-      executor = null;
     }
+    jvlite = null;
+    executor = null;
   }
 
+  @Override
   public void run()
   {
     while (jsExecQueue != null)
@@ -75,7 +109,7 @@ public class JSFunctionExec implements Runnable
   }
 
   /**
-   * execute a javascript callback asynchronously
+   * execute a javascript callback synchronously
    * 
    * @param _listener
    * @param objects
@@ -120,6 +154,7 @@ public class JSFunctionExec implements Runnable
     final Exception[] jsex = new Exception[1];
     Runnable exec = new Runnable()
     {
+      @Override
       public void run()
       {
         try
@@ -136,7 +171,7 @@ public class JSFunctionExec implements Runnable
           {
             if (jvlite.debug && dbgMsg != null)
             {
-              System.err.println(dbgMsg);
+              jalview.bin.Console.errPrintln(dbgMsg);
             }
             scriptObject.call(_listener, objects);
           }
@@ -147,17 +182,19 @@ public class JSFunctionExec implements Runnable
           {
             if (jvlite.debug)
             {
-              System.err.println(jex);
+              jalview.bin.Console.errPrintln(jex);
             }
-            if (jex instanceof netscape.javascript.JSException)
+            if (jex instanceof netscape.javascript.JSException
+                    && jvlite.jsfallbackEnabled)
             {
-              jsex[0] = (netscape.javascript.JSException) jex;
+              jsex[0] = jex;
               if (jvlite.debug)
               {
-                System.err.println("Falling back to javascript: url call");
+                jalview.bin.Console
+                        .errPrintln("Falling back to javascript: url call");
               }
-              StringBuffer sb = new StringBuffer("javascript:" + _listener
-                      + "(");
+              StringBuffer sb = new StringBuffer(
+                      "javascript:" + _listener + "(");
               for (int i = 0; objects != null && i < objects.length; i++)
               {
                 if (i > 0)
@@ -167,9 +204,8 @@ public class JSFunctionExec implements Runnable
                 sb.append("\"");
                 // strip out nulls and complex objects that we can't pass this
                 // way.
-                if (objects[i] != null
-                        && !(objects[i].getClass().getName()
-                                .indexOf("jalview") == 0))
+                if (objects[i] != null && !(objects[i].getClass().getName()
+                        .indexOf("jalview") == 0))
                 {
                   sb.append(objects[i].toString());
                 }
@@ -178,7 +214,7 @@ public class JSFunctionExec implements Runnable
               sb.append(")");
               if (jvlite.debug)
               {
-                System.err.println(sb.toString());
+                jalview.bin.Console.errPrintln(sb.toString());
               }
               // alternate
               URL url = null;
@@ -211,10 +247,9 @@ public class JSFunctionExec implements Runnable
     };
     if (async)
     {
-      if (JSFunctionExec.executor == null)
+      if (executor == null)
       {
-        JSFunctionExec.jsExecQueue = new Vector();
-        JSFunctionExec.executor = new Thread(new JSFunctionExec(jvlite));
+        executor = new Thread(new JSFunctionExec(jvlite));
         executor.start();
       }
       synchronized (jsExecQueue)
@@ -225,6 +260,7 @@ public class JSFunctionExec implements Runnable
     }
     else
     {
+      // wat for executor to notify us if it's running.
       exec.run();
       if (jsex[0] != null)
       {