1 package jalview.javascript;
4 import java.util.Vector;
6 import netscape.javascript.JSException;
7 import netscape.javascript.JSObject;
8 import jalview.bin.JalviewLite;
10 public class JSFunctionExec implements Runnable
14 public JSFunctionExec(JalviewLite applet)
19 private static Vector jsExecQueue;
21 private static Thread executor = null;
23 public static void stopQueue()
25 if (jsExecQueue != null)
27 Vector q = jsExecQueue;
29 q.removeAllElements();
37 while (jsExecQueue != null)
39 if (jsExecQueue.size() > 0)
41 Runnable r = (Runnable) jsExecQueue.elementAt(0);
42 jsExecQueue.removeElementAt(0);
46 } catch (Exception ex)
58 synchronized (jsExecQueue)
60 jsExecQueue.wait(1000);
62 } catch (Exception ex)
72 * execute a javascript callback asynchronously
78 public void executeJavascriptFunction(final String _listener,
79 final Object[] objects) throws Exception
81 executeJavascriptFunction(false, _listener, objects);
85 * execute a javascript callback synchronously or asynchronously
88 * - true to execute asynchronously (do this for gui events)
90 * - javascript function
94 * - only if call is synchronous
96 public void executeJavascriptFunction(final boolean async,
97 final String _listener, Object[] arguments) throws Exception
100 executeJavascriptFunction(async, _listener, arguments, null);
104 public void executeJavascriptFunction(final boolean async,
105 final String _listener, Object[] arguments, final String dbgMsg)
108 final Object[] objects = new Object[arguments != null ? arguments.length
110 if (arguments != null)
112 System.arraycopy(arguments, 0, objects, 0, arguments.length);
114 final Exception[] jsex = new Exception[1];
115 Runnable exec = new Runnable()
121 JSObject scriptObject = null;
124 scriptObject = JSObject.getWindow(jvlite);
125 } catch (Exception ex)
129 if (scriptObject != null)
131 if (jvlite.debug && dbgMsg != null)
133 System.err.println(dbgMsg);
135 scriptObject.call(_listener, objects);
137 } catch (Exception jex)
139 // squash any malformedURLExceptions thrown by windows/safari
140 if (!(jex instanceof java.net.MalformedURLException))
144 System.err.println(jex);
146 if (jex instanceof netscape.javascript.JSException)
148 jsex[0] = (netscape.javascript.JSException) jex;
151 System.err.println("Falling back to javascript: url call");
153 StringBuffer sb = new StringBuffer("javascript:" + _listener
155 for (int i = 0; objects != null && i < objects.length; i++)
162 // strip out nulls and complex objects that we can't pass this
164 if (objects[i] != null
165 && !(objects[i].getClass().getName()
166 .indexOf("jalview") == 0))
168 sb.append(objects[i].toString());
175 System.err.println(sb.toString());
181 url = new URL(sb.toString());
182 jvlite.getAppletContext().showDocument(url);
184 } catch (Exception uex)
193 jex.printStackTrace();
208 if (JSFunctionExec.executor == null)
210 JSFunctionExec.jsExecQueue = new Vector();
211 JSFunctionExec.executor = new Thread(new JSFunctionExec(jvlite));
214 synchronized (jsExecQueue)
216 jsExecQueue.addElement(exec);
217 jsExecQueue.notify();