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 synchronized (jsExecQueue)
29 Vector q = jsExecQueue;
30 q.removeAllElements();
40 while (jsExecQueue != null)
42 if (jsExecQueue.size() > 0)
44 Runnable r = (Runnable) jsExecQueue.elementAt(0);
45 jsExecQueue.removeElementAt(0);
49 } catch (Exception ex)
61 synchronized (jsExecQueue)
63 jsExecQueue.wait(1000);
65 } catch (Exception ex)
75 * execute a javascript callback asynchronously
81 public void executeJavascriptFunction(final String _listener,
82 final Object[] objects) throws Exception
84 executeJavascriptFunction(false, _listener, objects);
88 * execute a javascript callback synchronously or asynchronously
91 * - true to execute asynchronously (do this for gui events)
93 * - javascript function
97 * - only if call is synchronous
99 public void executeJavascriptFunction(final boolean async,
100 final String _listener, Object[] arguments) throws Exception
103 executeJavascriptFunction(async, _listener, arguments, null);
107 public void executeJavascriptFunction(final boolean async,
108 final String _listener, Object[] arguments, final String dbgMsg)
111 final Object[] objects = new Object[arguments != null ? arguments.length
113 if (arguments != null)
115 System.arraycopy(arguments, 0, objects, 0, arguments.length);
117 final Exception[] jsex = new Exception[1];
118 Runnable exec = new Runnable()
124 JSObject scriptObject = null;
127 scriptObject = JSObject.getWindow(jvlite);
128 } catch (Exception ex)
132 if (scriptObject != null)
134 if (jvlite.debug && dbgMsg != null)
136 System.err.println(dbgMsg);
138 scriptObject.call(_listener, objects);
140 } catch (Exception jex)
142 // squash any malformedURLExceptions thrown by windows/safari
143 if (!(jex instanceof java.net.MalformedURLException))
147 System.err.println(jex);
149 if (jex instanceof netscape.javascript.JSException)
151 jsex[0] = (netscape.javascript.JSException) jex;
154 System.err.println("Falling back to javascript: url call");
156 StringBuffer sb = new StringBuffer("javascript:" + _listener
158 for (int i = 0; objects != null && i < objects.length; i++)
165 // strip out nulls and complex objects that we can't pass this
167 if (objects[i] != null
168 && !(objects[i].getClass().getName()
169 .indexOf("jalview") == 0))
171 sb.append(objects[i].toString());
178 System.err.println(sb.toString());
184 url = new URL(sb.toString());
185 jvlite.getAppletContext().showDocument(url);
187 } catch (Exception uex)
196 jex.printStackTrace();
211 if (JSFunctionExec.executor == null)
213 JSFunctionExec.jsExecQueue = new Vector();
214 JSFunctionExec.executor = new Thread(new JSFunctionExec(jvlite));
217 synchronized (jsExecQueue)
219 jsExecQueue.addElement(exec);
220 jsExecQueue.notify();