| /* |
| * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| package com.sun.demo.scripting.jconsole; |
| |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import javax.swing.*; |
| import javax.swing.event.*; |
| import javax.swing.text.*; |
| |
| |
| /** |
| * A JPanel subclass containing a scrollable text area displaying the |
| * jconsole's script console. |
| */ |
| |
| public class ScriptShellPanel extends JPanel { |
| |
| private static final long serialVersionUID = 4116273141148726319L; |
| |
| // interface to evaluate script command and script prompt |
| interface CommandProcessor { |
| // execute given String as script and return the result |
| public String executeCommand(String cmd); |
| // get prompt used for interactive read-eval-loop |
| public String getPrompt(); |
| } |
| |
| // my script command processor |
| private CommandProcessor commandProcessor; |
| // editor component for command editing |
| private JTextComponent editor; |
| |
| private final ExecutorService commandExecutor = |
| Executors.newSingleThreadExecutor(); |
| |
| // document management |
| private boolean updating; |
| |
| public ScriptShellPanel(CommandProcessor cmdProc) { |
| setLayout(new BorderLayout()); |
| this.commandProcessor = cmdProc; |
| this.editor = new JTextArea(); |
| editor.setDocument(new EditableAtEndDocument()); |
| JScrollPane scroller = new JScrollPane(); |
| scroller.getViewport().add(editor); |
| add(scroller, BorderLayout.CENTER); |
| |
| editor.getDocument().addDocumentListener(new DocumentListener() { |
| @Override |
| public void changedUpdate(DocumentEvent e) { |
| } |
| |
| @Override |
| public void insertUpdate(DocumentEvent e) { |
| if (updating) return; |
| beginUpdate(); |
| editor.setCaretPosition(editor.getDocument().getLength()); |
| if (insertContains(e, '\n')) { |
| String cmd = getMarkedText(); |
| // Handle multi-line input |
| if ((cmd.length() == 0) || |
| (cmd.charAt(cmd.length() - 1) != '\\')) { |
| // Trim "\\n" combinations |
| final String cmd1 = trimContinuations(cmd); |
| commandExecutor.execute(new Runnable() { |
| @Override |
| public void run() { |
| final String result = executeCommand(cmd1); |
| |
| SwingUtilities.invokeLater(new Runnable() { |
| @Override |
| public void run() { |
| if (result != null) { |
| print(result + "\n"); |
| } |
| printPrompt(); |
| setMark(); |
| endUpdate(); |
| } |
| }); |
| } |
| }); |
| } else { |
| endUpdate(); |
| } |
| } else { |
| endUpdate(); |
| } |
| } |
| |
| @Override |
| public void removeUpdate(DocumentEvent e) { |
| } |
| }); |
| |
| // This is a bit of a hack but is probably better than relying on |
| // the JEditorPane to update the caret's position precisely the |
| // size of the insertion |
| editor.addCaretListener(new CaretListener() { |
| @Override |
| public void caretUpdate(CaretEvent e) { |
| int len = editor.getDocument().getLength(); |
| if (e.getDot() > len) { |
| editor.setCaretPosition(len); |
| } |
| } |
| }); |
| |
| Box hbox = Box.createHorizontalBox(); |
| hbox.add(Box.createGlue()); |
| JButton button = new JButton("Clear"); // FIXME: i18n? |
| button.addActionListener(new ActionListener() { |
| @Override |
| public void actionPerformed(ActionEvent e) { |
| clear(); |
| } |
| }); |
| hbox.add(button); |
| hbox.add(Box.createGlue()); |
| add(hbox, BorderLayout.SOUTH); |
| |
| clear(); |
| } |
| |
| public void dispose() { |
| commandExecutor.shutdown(); |
| } |
| |
| @Override |
| public void requestFocus() { |
| editor.requestFocus(); |
| } |
| |
| public void clear() { |
| clear(true); |
| } |
| |
| public void clear(boolean prompt) { |
| EditableAtEndDocument d = (EditableAtEndDocument) editor.getDocument(); |
| d.clear(); |
| if (prompt) printPrompt(); |
| setMark(); |
| editor.requestFocus(); |
| } |
| |
| public void setMark() { |
| ((EditableAtEndDocument) editor.getDocument()).setMark(); |
| } |
| |
| public String getMarkedText() { |
| try { |
| String s = ((EditableAtEndDocument) editor.getDocument()).getMarkedText(); |
| int i = s.length(); |
| while ((i > 0) && (s.charAt(i - 1) == '\n')) { |
| i--; |
| } |
| return s.substring(0, i); |
| } catch (BadLocationException e) { |
| e.printStackTrace(); |
| return null; |
| } |
| } |
| |
| public void print(String s) { |
| Document d = editor.getDocument(); |
| try { |
| d.insertString(d.getLength(), s, null); |
| } catch (BadLocationException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| |
| // |
| // Internals only below this point |
| // |
| |
| private String executeCommand(String cmd) { |
| return commandProcessor.executeCommand(cmd); |
| } |
| |
| private String getPrompt() { |
| return commandProcessor.getPrompt(); |
| } |
| |
| private void beginUpdate() { |
| editor.setEditable(false); |
| updating = true; |
| } |
| |
| private void endUpdate() { |
| editor.setEditable(true); |
| updating = false; |
| } |
| |
| private void printPrompt() { |
| print(getPrompt()); |
| } |
| |
| private boolean insertContains(DocumentEvent e, char c) { |
| String s = null; |
| try { |
| s = editor.getText(e.getOffset(), e.getLength()); |
| for (int i = 0; i < e.getLength(); i++) { |
| if (s.charAt(i) == c) { |
| return true; |
| } |
| } |
| } catch (BadLocationException ex) { |
| ex.printStackTrace(); |
| } |
| return false; |
| } |
| |
| private String trimContinuations(String text) { |
| int i; |
| while ((i = text.indexOf("\\\n")) >= 0) { |
| text = text.substring(0, i) + text.substring(i+1, text.length()); |
| } |
| return text; |
| } |
| } |