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src/jdk.scripting.nashorn.shell/share/classes/jdk/nashorn/tools/jjs/Main.java

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   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.nashorn.tools.jjs;
  27 



  28 import java.awt.GraphicsEnvironment;
  29 import java.io.BufferedReader;
  30 import java.io.File;
  31 import java.io.InputStream;
  32 import java.io.InputStreamReader;
  33 import java.io.IOException;
  34 import java.io.OutputStream;
  35 import java.io.PrintWriter;


  36 import java.util.function.Consumer;

  37 import jdk.internal.jline.console.completer.Completer;
  38 import jdk.internal.jline.console.UserInterruptException;
  39 import jdk.nashorn.api.scripting.NashornException;
  40 import jdk.nashorn.internal.objects.Global;

  41 import jdk.nashorn.internal.runtime.Context;
  42 import jdk.nashorn.internal.runtime.JSType;
  43 import jdk.nashorn.internal.runtime.Property;
  44 import jdk.nashorn.internal.runtime.ScriptEnvironment;

  45 import jdk.nashorn.internal.runtime.ScriptRuntime;
  46 import jdk.nashorn.tools.Shell;
  47 
  48 /**
  49  * Interactive command line Shell for Nashorn.
  50  */
  51 public final class Main extends Shell {
  52     private Main() {}
  53 
  54     static final boolean DEBUG = Boolean.getBoolean("nashorn.jjs.debug");
  55     static final boolean HEADLESS = GraphicsEnvironment.isHeadless();
  56 
  57     // file where history is persisted.
  58     private static final File HIST_FILE = new File(new File(System.getProperty("user.home")), ".jjs.history");
  59 
  60     /**
  61      * Main entry point with the default input, output and error streams.
  62      *
  63      * @param args The command line arguments
  64      */


  92     }
  93 
  94 
  95     /**
  96      * read-eval-print loop for Nashorn shell.
  97      *
  98      * @param context the nashorn context
  99      * @param global  global scope object to use
 100      * @return return code
 101      */
 102     protected int readEvalPrint(final Context context, final Global global) {
 103         final ScriptEnvironment env = context.getEnv();
 104         final String prompt = bundle.getString("shell.prompt");
 105         final String prompt2 = bundle.getString("shell.prompt2");
 106         final PrintWriter err = context.getErr();
 107         final Global oldGlobal = Context.getGlobal();
 108         final boolean globalChanged = (oldGlobal != global);
 109         final PropertiesHelper propsHelper = new PropertiesHelper(env._classpath);
 110         final NashornCompleter completer = new NashornCompleter(context, global, this, propsHelper);
 111 
 112         try (final Console in = new Console(System.in, System.out, HIST_FILE, completer)) {





















 113             if (globalChanged) {
 114                 Context.setGlobal(global);
 115             }
 116 
 117             global.addShellBuiltins();
 118 
 119             if (System.getSecurityManager() == null) {
 120                 final Consumer<String> evaluator = str -> {
 121                     // could be called from different thread (GUI), we need to handle Context set/reset
 122                     final Global _oldGlobal = Context.getGlobal();
 123                     final boolean _globalChanged = (oldGlobal != global);
 124                     if (_globalChanged) {
 125                         Context.setGlobal(global);
 126                     }
 127                     try {
 128                         evalImpl(context, global, str, err, env._dump_on_error);
 129                     } finally {
 130                         if (_globalChanged) {
 131                             Context.setGlobal(_oldGlobal);
 132                         }


 147                 } catch (final IOException ioe) {
 148                     err.println(ioe.toString());
 149                     if (env._dump_on_error) {
 150                         ioe.printStackTrace(err);
 151                     }
 152                     return IO_ERROR;
 153                 } catch (final UserInterruptException ex) {
 154                     break;
 155                 }
 156 
 157                 if (source == null) {
 158                     break;
 159                 }
 160 
 161                 if (source.isEmpty()) {
 162                     continue;
 163                 }
 164 
 165                 try {
 166                     final Object res = context.eval(global, source, global, "<shell>");
 167                     if (res != ScriptRuntime.UNDEFINED) {
 168                         err.println(toString(res, global));
 169                     }
 170                 } catch (final Exception exp) {
 171                     // Is this a ECMAScript SyntaxError at last column (of the single line)?
 172                     // If so, it is because parser expected more input but got EOF. Try to
 173                     // to more lines from the user (multiline edit support).
 174 
 175                     if (completer.isSyntaxErrorAt(exp, 1, source.length())) {
 176                         final String fullSrc = completer.readMoreLines(source, exp, in, prompt2, err);
 177 
 178                         // check if we succeeded in getting complete code.
 179                         if (fullSrc != null && !fullSrc.isEmpty()) {
 180                             evalImpl(context, global, fullSrc, err, env._dump_on_error);
 181                         } // else ignore, error reported already by 'completer.readMoreLines'
 182                     } else {
 183 
 184                         // can't read more lines to have parseable/complete code.
 185                         err.println(exp);
 186                         if (env._dump_on_error) {
 187                             exp.printStackTrace(err);


 201             try {
 202                 propsHelper.close();
 203             } catch (final Exception exp) {
 204                 if (DEBUG) {
 205                     exp.printStackTrace();
 206                 }
 207             }
 208         }
 209 
 210         return SUCCESS;
 211     }
 212 
 213     static String getMessage(final String id) {
 214         return bundle.getString(id);
 215     }
 216 
 217     private void evalImpl(final Context context, final Global global, final String source,
 218             final PrintWriter err, final boolean doe) {
 219         try {
 220             final Object res = context.eval(global, source, global, "<shell>");
 221             if (res != ScriptRuntime.UNDEFINED) {
 222                 err.println(JSType.toString(res));
 223             }
 224         } catch (final Exception e) {
 225             err.println(e);
 226             if (doe) {
 227                 e.printStackTrace(err);
 228             }











 229         }
 230     }
 231 }


   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.nashorn.tools.jjs;
  27 
  28 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
  29 
  30 import java.awt.Desktop;
  31 import java.awt.GraphicsEnvironment;
  32 import java.io.BufferedReader;
  33 import java.io.File;
  34 import java.io.InputStream;
  35 import java.io.InputStreamReader;
  36 import java.io.IOException;
  37 import java.io.OutputStream;
  38 import java.io.PrintWriter;
  39 import java.net.URI;
  40 import java.util.concurrent.Callable;
  41 import java.util.function.Consumer;
  42 import java.util.function.Function;
  43 import jdk.internal.jline.console.completer.Completer;
  44 import jdk.internal.jline.console.UserInterruptException;
  45 import jdk.nashorn.api.scripting.NashornException;
  46 import jdk.nashorn.internal.objects.Global;
  47 import jdk.nashorn.internal.objects.NativeJava;
  48 import jdk.nashorn.internal.runtime.Context;
  49 import jdk.nashorn.internal.runtime.JSType;
  50 import jdk.nashorn.internal.runtime.Property;
  51 import jdk.nashorn.internal.runtime.ScriptEnvironment;
  52 import jdk.nashorn.internal.runtime.ScriptFunction;
  53 import jdk.nashorn.internal.runtime.ScriptRuntime;
  54 import jdk.nashorn.tools.Shell;
  55 
  56 /**
  57  * Interactive command line Shell for Nashorn.
  58  */
  59 public final class Main extends Shell {
  60     private Main() {}
  61 
  62     static final boolean DEBUG = Boolean.getBoolean("nashorn.jjs.debug");
  63     static final boolean HEADLESS = GraphicsEnvironment.isHeadless();
  64 
  65     // file where history is persisted.
  66     private static final File HIST_FILE = new File(new File(System.getProperty("user.home")), ".jjs.history");
  67 
  68     /**
  69      * Main entry point with the default input, output and error streams.
  70      *
  71      * @param args The command line arguments
  72      */


 100     }
 101 
 102 
 103     /**
 104      * read-eval-print loop for Nashorn shell.
 105      *
 106      * @param context the nashorn context
 107      * @param global  global scope object to use
 108      * @return return code
 109      */
 110     protected int readEvalPrint(final Context context, final Global global) {
 111         final ScriptEnvironment env = context.getEnv();
 112         final String prompt = bundle.getString("shell.prompt");
 113         final String prompt2 = bundle.getString("shell.prompt2");
 114         final PrintWriter err = context.getErr();
 115         final Global oldGlobal = Context.getGlobal();
 116         final boolean globalChanged = (oldGlobal != global);
 117         final PropertiesHelper propsHelper = new PropertiesHelper(env._classpath);
 118         final NashornCompleter completer = new NashornCompleter(context, global, this, propsHelper);
 119 
 120         try (final Console in = new Console(System.in, System.out, HIST_FILE, completer,
 121                 str -> {
 122                     try {
 123                         final Object res = context.eval(global, str, global, "<shell>");
 124                         if (res != null && res != UNDEFINED) {
 125                             // Special case Java types: show the javadoc for the class.
 126                             if (NativeJava.isType(UNDEFINED, res)) {
 127                                 openBrowserForJavadoc(NativeJava.typeName(UNDEFINED, res).toString());
 128                             }
 129 
 130                             if (res instanceof ScriptFunction) {
 131                                 return ((ScriptFunction)res).getDocumentation();
 132                             }
 133 
 134                             // FIXME: better than toString for other cases?
 135                             return JSType.toString(res);
 136                         }
 137                      } catch (Exception ignored) {
 138                      }
 139                      return null;
 140                 })) {
 141 
 142             if (globalChanged) {
 143                 Context.setGlobal(global);
 144             }
 145 
 146             global.addShellBuiltins();
 147 
 148             if (System.getSecurityManager() == null) {
 149                 final Consumer<String> evaluator = str -> {
 150                     // could be called from different thread (GUI), we need to handle Context set/reset
 151                     final Global _oldGlobal = Context.getGlobal();
 152                     final boolean _globalChanged = (oldGlobal != global);
 153                     if (_globalChanged) {
 154                         Context.setGlobal(global);
 155                     }
 156                     try {
 157                         evalImpl(context, global, str, err, env._dump_on_error);
 158                     } finally {
 159                         if (_globalChanged) {
 160                             Context.setGlobal(_oldGlobal);
 161                         }


 176                 } catch (final IOException ioe) {
 177                     err.println(ioe.toString());
 178                     if (env._dump_on_error) {
 179                         ioe.printStackTrace(err);
 180                     }
 181                     return IO_ERROR;
 182                 } catch (final UserInterruptException ex) {
 183                     break;
 184                 }
 185 
 186                 if (source == null) {
 187                     break;
 188                 }
 189 
 190                 if (source.isEmpty()) {
 191                     continue;
 192                 }
 193 
 194                 try {
 195                     final Object res = context.eval(global, source, global, "<shell>");
 196                     if (res != UNDEFINED) {
 197                         err.println(toString(res, global));
 198                     }
 199                 } catch (final Exception exp) {
 200                     // Is this a ECMAScript SyntaxError at last column (of the single line)?
 201                     // If so, it is because parser expected more input but got EOF. Try to
 202                     // to more lines from the user (multiline edit support).
 203 
 204                     if (completer.isSyntaxErrorAt(exp, 1, source.length())) {
 205                         final String fullSrc = completer.readMoreLines(source, exp, in, prompt2, err);
 206 
 207                         // check if we succeeded in getting complete code.
 208                         if (fullSrc != null && !fullSrc.isEmpty()) {
 209                             evalImpl(context, global, fullSrc, err, env._dump_on_error);
 210                         } // else ignore, error reported already by 'completer.readMoreLines'
 211                     } else {
 212 
 213                         // can't read more lines to have parseable/complete code.
 214                         err.println(exp);
 215                         if (env._dump_on_error) {
 216                             exp.printStackTrace(err);


 230             try {
 231                 propsHelper.close();
 232             } catch (final Exception exp) {
 233                 if (DEBUG) {
 234                     exp.printStackTrace();
 235                 }
 236             }
 237         }
 238 
 239         return SUCCESS;
 240     }
 241 
 242     static String getMessage(final String id) {
 243         return bundle.getString(id);
 244     }
 245 
 246     private void evalImpl(final Context context, final Global global, final String source,
 247             final PrintWriter err, final boolean doe) {
 248         try {
 249             final Object res = context.eval(global, source, global, "<shell>");
 250             if (res != UNDEFINED) {
 251                 err.println(JSType.toString(res));
 252             }
 253         } catch (final Exception e) {
 254             err.println(e);
 255             if (doe) {
 256                 e.printStackTrace(err);
 257             }
 258         }
 259     }
 260 
 261     // FIXME: needs to be changed to use javase 9 docs later
 262     private static String JAVADOC_BASE = "http://download.java.net/jdk9/docs/api/";
 263 
 264     private static void openBrowserForJavadoc(String clsName) {
 265         try {
 266             final URI uri = new URI(JAVADOC_BASE + clsName.replace('.', '/') + ".html");
 267             Desktop.getDesktop().browse(uri);
 268         } catch (Exception ignored) {
 269         }
 270     }
 271 }
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