defaulteditorkit.java

gcc的组建

/* DefaultEditorKit.java --
   Copyright (C) 2002, 2004, 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package javax.swing.text;

import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;

import javax.swing.Action;

/**
 * The default implementation of {@link EditorKit}. This <code>EditorKit</code>
 * a plain text <code>Document</code> and several commands that together
 * make up a basic editor, like cut / copy + paste.
 *
 * @author original author unknown
 * @author Roman Kennke ([e-mail])
 */
public class DefaultEditorKit extends EditorKit
{
  /**
   * Creates a beep on the PC speaker.
   *
   * @see Toolkit#beep()
   */
  public static class BeepAction extends TextAction
  {
    /**
     * Creates a new <code>BeepAction</code>.
     */
    public BeepAction()
    {
      super(beepAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      Toolkit.getDefaultToolkit().beep();
    }
  }

  /**
   * Copies the selected content into the system clipboard.
   *
   * @see Toolkit#getSystemClipboard()
   * @see CutAction
   * @see PasteAction
   */
  public static class CopyAction extends TextAction
  {

    /**
     * Create a new <code>CopyAction</code>.
     */
    public CopyAction()
    {
      super(copyAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      // FIXME: Implement me. Tookit.getSystemClipboard should be used
      // for that.
    }
  }


  /**
   * Copies the selected content into the system clipboard and deletes the
   * selection.
   *
   * @see Toolkit#getSystemClipboard()
   * @see CopyAction
   * @see PasteAction
   */
  public static class CutAction extends TextAction
  {

    /**
     * Create a new <code>CutAction</code>.
     */
    public CutAction()
    {
      super(cutAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      // FIXME: Implement me. Tookit.getSystemClipboard should be used
      // for that.
    }
  }

  /**
   * Copies content from the system clipboard into the editor.
   *
   * @see Toolkit#getSystemClipboard()
   * @see CopyAction
   * @see CutAction
   */
  public static class PasteAction extends TextAction
  {

    /**
     * Create a new <code>PasteAction</code>.
     */
    public PasteAction()
    {
      super(pasteAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      // FIXME: Implement me. Tookit.getSystemClipboard should be used
      // for that.
    }
  }

  /**
   * This action is executed as default action when a KEY_TYPED
   * event is received and no keymap entry exists for that. The purpose
   * of this action is to filter out a couple of characters. This includes
   * the control characters and characters with the ALT-modifier.
   * 
   * If an event does not get filtered, it is inserted into the document
   * of the text component. If there is some text selected in the text
   * component, this text will be replaced.
   */
  public static class DefaultKeyTypedAction 
    extends TextAction
  {

    /**
     * Creates a new <code>DefaultKeyTypedAction</code>.
     */
    public DefaultKeyTypedAction()
    {
      super(defaultKeyTypedAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      // first we filter the following events:
      // - control characters
      // - key events with the ALT modifier (FIXME: filter that too!)
      char c = event.getActionCommand().charAt(0);
      if (Character.isISOControl(c))
        return;

      JTextComponent t = getTextComponent(event);
      if (t != null)
        {
          try
            {
              t.getDocument().insertString(t.getCaret().getDot(),
                                           event.getActionCommand(), null);
            }
          catch (BadLocationException be)
            {
              // FIXME: we're not authorized to throw this.. swallow it?
            }
        }
    }
  }

  /**
   * This action inserts a newline character into the document
   * of the text component. This is typically triggered by hitting
   * ENTER on the keyboard.
   */
  public static class InsertBreakAction extends TextAction
  {

    /**
     * Creates a new <code>InsertBreakAction</code>.
     */
    public InsertBreakAction()
    {
      super(insertBreakAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      JTextComponent t = getTextComponent(event);
      t.replaceSelection("\n");
    }
  }

  /**
   * Places content into the associated editor. If there currently is a
   * selection, this selection is replaced.
   */
  // FIXME: Figure out what this Action is supposed to do. Obviously text
  // that is entered by the user is inserted through DefaultKeyTypedAction.
  public static class InsertContentAction extends TextAction
  {

    /**
     * Creates a new <code>InsertContentAction</code>.
     */
    public InsertContentAction()
    {
      super(insertContentAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      // FIXME: Figure out what this Action is supposed to do. Obviously text
      // that is entered by the user is inserted through DefaultKeyTypedAction.
    }
  }

  /**
   * Inserts a TAB character into the text editor.
   */
  public static class InsertTabAction extends TextAction
  {

    /**
     * Creates a new <code>TabAction</code>.
     */
    public InsertTabAction()
    {
      super(insertTabAction);
    }

    /**
     * Performs the <code>Action</code>.
     *
     * @param event the action event describing the user action
     */
    public void actionPerformed(ActionEvent event)
    {
      // FIXME: Implement this.
    }
  }

  /**
   * The serial version of DefaultEditorKit.
   */
  private static final long serialVersionUID = 9017245433028523428L;

  /**
   * The name of the <code>Action</code> that moves the caret one character
   * backwards.
   *
   * @see #getActions()
   */
  public static final String backwardAction = "caret-backward";

  /**
   * The name of the <code>Action</code> that creates a beep in the speaker.
   *
   * @see #getActions()
   */
  public static final String beepAction = "beep";

  /**
   * The name of the <code>Action</code> that moves the caret to the beginning
   * of the <code>Document</code>.
   *
   * @see #getActions()
   */
  public static final String beginAction = "caret-begin";

  /**
   * The name of the <code>Action</code> that moves the caret to the beginning
   * of the current line.
   *
   * @see #getActions()
   */
  public static final String beginLineAction = "caret-begin-line";

  /**
   * The name of the <code>Action</code> that moves the caret to the beginning
   * of the current paragraph.
   *
   * @see #getActions()
   */
  public static final String beginParagraphAction = "caret-begin-paragraph";

  /**
   * The name of the <code>Action</code> that moves the caret to the beginning
   * of the current word.
   *
   * @see #getActions()
   */
  public static final String beginWordAction = "caret-begin-word";

  /**
   * The name of the <code>Action</code> that copies the selected content
   * into the system clipboard.
   *
   * @see #getActions()
   */
  public static final String copyAction = "copy-to-clipboard";

  /**
   * The name of the <code>Action</code> that copies the selected content
   * into the system clipboard and removes the selection.
   *
   * @see #getActions()
   */
  public static final String cutAction = "cut-to-clipboard";

  /**
   * The name of the <code>Action</code> that is performed by default if
   * a key is typed and there is no keymap entry.
   *
   * @see #getActions()
   */
  public static final String defaultKeyTypedAction = "default-typed";

  /**
   * The name of the <code>Action</code> that deletes the character that
   * follows the current caret position.
   *
   * @see #getActions()
   */
  public static final String deleteNextCharAction = "delete-next";

  /**
   * The name of the <code>Action</code> that deletes the character that
   * precedes the current caret position.
   *
   * @see #getActions()
   */
  public static final String deletePrevCharAction = "delete-previous";

  /**
   * The name of the <code>Action</code> that moves the caret one line down.
   *
   * @see #getActions()
   */
  public static final String downAction = "caret-down";

  /**
   * The name of the <code>Action</code> that moves the caret to the end
   * of the <code>Document</code>.
   *
   * @see #getActions()
   */
  public static final String endAction = "caret-end";

  /**
   * The name of the <code>Action</code> that moves the caret to the end
   * of the current line.
   *
   * @see #getActions()
   */
  public static final String endLineAction = "caret-end-line";

  /**
   * When a document is read and an CRLF is encountered, then we add a property
   * with this name and a value of &quot;\r\n&quot;.
   */
  public static final String EndOfLineStringProperty = "__EndOfLine__";

  /**
   * The name of the <code>Action</code> that moves the caret to the end
   * of the current paragraph.
   *
   * @see #getActions()
   */
  public static final String endParagraphAction = "caret-end-paragraph";

  /**
   * The name of the <code>Action</code> that moves the caret to the end
   * of the current word.
   *
   * @see #getActions()
   */
  public static final String endWordAction = "caret-end-word";

  /**
   * The name of the <code>Action</code> that moves the caret one character
   * forward.
   *
   * @see #getActions()
   */
  public static final String forwardAction = "caret-forward";

  /**
   * The name of the <code>Action</code> that inserts a line break.
   *
   * @see #getActions()
   */
  public static final String insertBreakAction = "insert-break";

  /**
   * The name of the <code>Action</code> that inserts some content.
   *
   * @see #getActions()
   */
  public static final String insertContentAction = "insert-content";

  /**
   * The name of the <code>Action</code> that inserts a TAB.
   *
   * @see #getActions()
   */
  public static final String insertTabAction = "insert-tab";

  /**
   * The name of the <code>Action</code> that moves the caret to the beginning
   * of the next word.
   *