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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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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22 private Vector jsExecQueue;
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24 private Thread executor = null;
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26 public void stopQueue()
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28 if (jsExecQueue != null)
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30 synchronized (jsExecQueue)
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32 Vector q = jsExecQueue;
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33 q.removeAllElements();
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46 while (jsExecQueue != null)
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48 if (jsExecQueue.size() > 0)
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50 Runnable r = (Runnable) jsExecQueue.elementAt(0);
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51 jsExecQueue.removeElementAt(0);
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55 } catch (Exception ex)
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57 ex.printStackTrace();
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60 ex.printStackTrace();
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67 synchronized (jsExecQueue)
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69 jsExecQueue.wait(1000);
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71 } catch (Exception ex)
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81 * execute a javascript callback synchronously
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87 public void executeJavascriptFunction(final String _listener,
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88 final Object[] objects) throws Exception
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90 executeJavascriptFunction(false, _listener, objects);
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94 * execute a javascript callback synchronously or asynchronously
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97 * - true to execute asynchronously (do this for gui events)
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99 * - javascript function
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102 * @throws Exception
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103 * - only if call is synchronous
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105 public void executeJavascriptFunction(final boolean async,
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106 final String _listener, Object[] arguments) throws Exception
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109 executeJavascriptFunction(async, _listener, arguments, null);
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113 public void executeJavascriptFunction(final boolean async,
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114 final String _listener, Object[] arguments, final String dbgMsg)
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117 final Object[] objects = new Object[arguments != null ? arguments.length
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119 if (arguments != null)
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121 System.arraycopy(arguments, 0, objects, 0, arguments.length);
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123 final Exception[] jsex = new Exception[1];
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124 Runnable exec = new Runnable()
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130 JSObject scriptObject = null;
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133 scriptObject = JSObject.getWindow(jvlite);
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134 } catch (Exception ex)
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138 if (scriptObject != null)
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140 if (jvlite.debug && dbgMsg != null)
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142 System.err.println(dbgMsg);
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144 scriptObject.call(_listener, objects);
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146 } catch (Exception jex)
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148 // squash any malformedURLExceptions thrown by windows/safari
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149 if (!(jex instanceof java.net.MalformedURLException))
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153 System.err.println(jex);
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155 if (jex instanceof netscape.javascript.JSException && jvlite.jsfallbackEnabled)
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157 jsex[0] = (netscape.javascript.JSException) jex;
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160 System.err.println("Falling back to javascript: url call");
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162 StringBuffer sb = new StringBuffer("javascript:" + _listener
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164 for (int i = 0; objects != null && i < objects.length; i++)
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171 // strip out nulls and complex objects that we can't pass this
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173 if (objects[i] != null
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174 && !(objects[i].getClass().getName()
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175 .indexOf("jalview") == 0))
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177 sb.append(objects[i].toString());
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184 System.err.println(sb.toString());
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190 url = new URL(sb.toString());
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191 jvlite.getAppletContext().showDocument(url);
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193 } catch (Exception uex)
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202 jex.printStackTrace();
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217 if (executor == null)
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219 executor = new Thread(new JSFunctionExec(jvlite));
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222 synchronized (jsExecQueue)
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224 jsExecQueue.addElement(exec);
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225 jsExecQueue.notify();
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230 // wat for executor to notify us if it's running.
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232 if (jsex[0] != null)
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