1 package jalview.javascript;
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4 import java.util.Vector;
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6 import netscape.javascript.JSException;
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7 import netscape.javascript.JSObject;
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8 import jalview.bin.JalviewLite;
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10 public class JSFunctionExec implements Runnable
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12 public JalviewLite jvlite;
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14 public JSFunctionExec(JalviewLite applet)
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18 jsExecQueue = jvlite.getJsExecQueue();
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19 jvlite.setExecutor(this);
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21 public void finalize() {
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24 if (jsExecQueue!=null)
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26 jsExecQueue.clear();
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30 private Vector jsExecQueue;
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32 private Thread executor = null;
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34 public void stopQueue()
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36 if (jsExecQueue != null)
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38 Vector<JSFunctionExec> q=null;
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39 synchronized (jsExecQueue)
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45 for (JSFunctionExec jx : q)
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50 q.removeAllElements();
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63 while (jsExecQueue != null)
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65 if (jsExecQueue.size() > 0)
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67 Runnable r = (Runnable) jsExecQueue.elementAt(0);
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68 jsExecQueue.removeElementAt(0);
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72 } catch (Exception ex)
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74 ex.printStackTrace();
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77 ex.printStackTrace();
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84 synchronized (jsExecQueue)
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86 jsExecQueue.wait(1000);
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88 } catch (Exception ex)
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98 * execute a javascript callback synchronously
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102 * @throws Exception
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104 public void executeJavascriptFunction(final String _listener,
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105 final Object[] objects) throws Exception
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107 executeJavascriptFunction(false, _listener, objects);
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111 * execute a javascript callback synchronously or asynchronously
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114 * - true to execute asynchronously (do this for gui events)
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116 * - javascript function
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119 * @throws Exception
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120 * - only if call is synchronous
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122 public void executeJavascriptFunction(final boolean async,
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123 final String _listener, Object[] arguments) throws Exception
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126 executeJavascriptFunction(async, _listener, arguments, null);
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130 public void executeJavascriptFunction(final boolean async,
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131 final String _listener, Object[] arguments, final String dbgMsg)
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134 final Object[] objects = new Object[arguments != null ? arguments.length
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136 if (arguments != null)
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138 System.arraycopy(arguments, 0, objects, 0, arguments.length);
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140 final Exception[] jsex = new Exception[1];
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141 Runnable exec = new Runnable()
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147 JSObject scriptObject = null;
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150 scriptObject = JSObject.getWindow(jvlite);
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151 } catch (Exception ex)
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155 if (scriptObject != null)
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157 if (jvlite.debug && dbgMsg != null)
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159 System.err.println(dbgMsg);
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161 scriptObject.call(_listener, objects);
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163 } catch (Exception jex)
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165 // squash any malformedURLExceptions thrown by windows/safari
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166 if (!(jex instanceof java.net.MalformedURLException))
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170 System.err.println(jex);
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172 if (jex instanceof netscape.javascript.JSException && jvlite.jsfallbackEnabled)
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174 jsex[0] = (netscape.javascript.JSException) jex;
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177 System.err.println("Falling back to javascript: url call");
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179 StringBuffer sb = new StringBuffer("javascript:" + _listener
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181 for (int i = 0; objects != null && i < objects.length; i++)
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188 // strip out nulls and complex objects that we can't pass this
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190 if (objects[i] != null
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191 && !(objects[i].getClass().getName()
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192 .indexOf("jalview") == 0))
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194 sb.append(objects[i].toString());
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201 System.err.println(sb.toString());
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207 url = new URL(sb.toString());
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208 jvlite.getAppletContext().showDocument(url);
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210 } catch (Exception uex)
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219 jex.printStackTrace();
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234 if (executor == null)
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236 executor = new Thread(new JSFunctionExec(jvlite));
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239 synchronized (jsExecQueue)
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241 jsExecQueue.addElement(exec);
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242 jsExecQueue.notify();
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247 // wat for executor to notify us if it's running.
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249 if (jsex[0] != null)
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