textarea.java

linux下建立JAVA虚拟机的源码KAFFE

   * prefer to display, and on the size of the font in which the text
   * would be displayed.
   *
   * @return The minimum size for this text area.
   *
   * @deprecated This method is deprecated in favor of
   * <code>getMinimumSize ()</code>.
   */
  public Dimension minimumSize ()
  {
    return minimumSize (getRows (), getColumns ());
  }

  /**
   * Retrieve the minimum size that this text area would have if its
   * row and column values were equal to those specified.  A text
   * area's minimum size depends on the number of rows and columns of
   * text it would prefer to display, and on the size of the font in
   * which the text would be displayed.
   *
   * @param rows The number of rows to use in the minimum size
   * calculation.
   * @param columns The number of columns to use in the minimum size
   * calculation.
   *
   * @return The minimum size for this text area.
   *
   * @deprecated This method is deprecated in favor of
   * <code>getMinimumSize (int, int)</code>.
   */
  public Dimension minimumSize (int rows, int columns)
  {
    TextAreaPeer peer = (TextAreaPeer) getPeer ();

    // Sun returns Dimension (0,0) in this case.
    if (peer == null)
      return new Dimension (0, 0);

    return peer.getMinimumSize (rows, columns);
  }

  /**
   * Retrieve the preferred size for this text area, considering the
   * text area's current row and column values.  A text area's preferred
   * size depends on the number of rows and columns of text it would
   * prefer to display, and on the size of the font in which the text
   * would be displayed.
   *
   * @return The preferred size for this text field.
   */
  public Dimension getPreferredSize ()
  {
    return getPreferredSize (getRows (), getColumns ());
  }

  /**
   * Retrieve the preferred size that this text area would have if its
   * row and column values were equal to those specified.  A text
   * area's preferred size depends on the number of rows and columns
   * of text it would prefer to display, and on the size of the font
   * in which the text would be displayed.
   *
   * @param rows The number of rows to use in the preferred size
   * calculation.
   * @param columns The number of columns to use in the preferred size
   * calculation.
   *
   * @return The preferred size for this text area.
   */
  public Dimension getPreferredSize (int rows, int columns)
  {
    return preferredSize (rows, columns);
  }

  /**
   * Retrieve the preferred size for this text area, considering the
   * text area's current row and column values.  A text area's preferred
   * size depends on the number of rows and columns of text it would
   * prefer to display, and on the size of the font in which the text
   * would be displayed.
   *
   * @return The preferred size for this text field.
   *
   * @deprecated This method is deprecated in favor of
   * <code>getPreferredSize ()</code>.
   */
  public Dimension preferredSize ()
  {
    return preferredSize (getRows (), getColumns ());
  }

  /**
   * Retrieve the preferred size that this text area would have if its
   * row and column values were equal to those specified.  A text
   * area's preferred size depends on the number of rows and columns
   * of text it would prefer to display, and on the size of the font
   * in which the text would be displayed.
   *
   * @param rows The number of rows to use in the preferred size
   * calculation.
   * @param columns The number of columns to use in the preferred size
   * calculation.
   *
   * @return The preferred size for this text area.
   *
   * @deprecated This method is deprecated in favor of
   * <code>getPreferredSize (int, int)</code>.
   */
  public Dimension preferredSize (int rows, int columns)
  {
    TextAreaPeer peer = (TextAreaPeer) getPeer ();

    // Sun returns Dimension (0,0) in this case.
    if (peer == null)
      return new Dimension (0, 0);

    return peer.getPreferredSize (rows, columns);
  }

  /**
   * Retrieve the scroll bar display policy -- one of SCROLLBARS_BOTH,
   * SCROLLBARS_VERTICAL_ONLY, SCROLLBARS_HORIZONTAL_ONLY,
   * SCROLLBARS_NONE.
   *
   * @return The current scroll bar display policy.
   */
  public int getScrollbarVisibility ()
  {
    return scrollbarVisibility;
  }

  /**
   * Notify this object that it should create its native peer.
   */
  public void addNotify ()
  {
    if (getPeer () == null)
      setPeer ((ComponentPeer) getToolkit().createTextArea (this));
  }

  /**
   * Append the specified text to the end of the current text.
   *
   * @param str The text to append.
   */
  public void append (String str)
  {
    appendText (str);
  }

  /**
   * Append the specified text to the end of the current text.
   *
   * @param str The text to append.
   *
   * @deprecated This method is deprecated in favor of
   * <code>append ()</code>.
   */
  public void appendText (String str)
  {
    TextAreaPeer peer = (TextAreaPeer) getPeer ();

    if (peer != null)
      peer.insert (str, peer.getText().length ());
  }

  /**
   * Insert the specified text at the specified position.  The first
   * character in the text area is at position zero.
   *
   * @param str The text to insert.
   * @param pos The position at which to insert text.
   */
  public void insert (String str, int pos)
  {
    insertText (str, pos);
  }

  /**
   * Insert the specified text at the specified position.  The first
   * character in the text area is at position zero.
   *
   * @param str The text to insert.
   * @param pos The position at which to insert text.
   *
   * @deprecated This method is deprecated in favor of
   * <code>insert ()</code>.
   */
  public void insertText (String str, int pos)
  {
    TextAreaPeer peer = (TextAreaPeer) getPeer ();

    if (peer != null)
      peer.insert (str, pos);
  }

  /**
   * Replace a range of characters with the specified text.  The
   * character at the start position will be replaced, unless start ==
   * end.  The character at the end posistion will not be replaced.
   * The first character in the text area is at position zero.  The
   * length of the replacement text may differ from the length of the
   * text that is replaced.
   *
   * @param str The new text for the range.
   * @param start The start position of the replacement range.
   * @param end The end position of the replacement range.
   */
  public void replaceRange (String str, int start, int end)
  {
    replaceText (str, start, end);
  }

  /**
   * Replace a range of characters with the specified text.  The
   * character at the start position will be replaced, unless start ==
   * end.  The character at the end posistion will not be replaced.
   * The first character in the text area is at position zero.  The
   * length of the replacement text may differ from the length of the
   * text that is replaced.
   *
   * @param str The new text for the range.
   * @param start The start position of the replacement range.
   * @param end The end position of the replacement range.
   *
   * @deprecated This method is deprecated in favor of
   * <code>replaceRange ()</code>.
   */
  public void replaceText (String str, int start, int end)
  {
    TextAreaPeer peer = (TextAreaPeer) getPeer ();

    if (peer != null)
      peer.replaceRange (str, start, end);
  }

  /**
   * Retrieve a debugging string for this text area.
   *
   * @return A debugging string for this text area.
   */
  protected String paramString ()
  {
    String sbVisibility = "";

    switch (scrollbarVisibility)
      {
      case SCROLLBARS_BOTH:
	sbVisibility = "both";
	break;
      case SCROLLBARS_VERTICAL_ONLY:
	sbVisibility = "vertical-only";
	break;
      case SCROLLBARS_HORIZONTAL_ONLY:
	sbVisibility = "horizontal-only";
	break;
      case SCROLLBARS_NONE:
	sbVisibility = "none";
	break;
      }

    String editable = "";
    if (isEditable ())
      editable = "editable,";

    return getName () + "," + getX () + "," + getY () + "," + getWidth ()
           + "x" + getHeight () + "," + "text=" + getText () + "," + editable
           + "selection=" + getSelectionStart () + "-" + getSelectionEnd ()
           + ",rows=" + rows + ",columns=" + columns + ",scrollbarVisibility="
           + sbVisibility;
  }

  /**
   * Generate a unique name for this text area.
   *
   * @return A unique name for this text area.
   */
  String generateName ()
  {
    return "text" + getUniqueLong ();
  }

  private static synchronized long getUniqueLong ()
  {
    return next_text_number++;
  }
  
  protected class AccessibleAWTTextArea extends AccessibleAWTTextComponent
  {
    private static final long serialVersionUID = 3472827823632144419L;

    protected AccessibleAWTTextArea()
    {
    }
    
    public AccessibleStateSet getAccessibleStateSet()
    {
      return super.getAccessibleStateSet();
    }
  }
  
  /**
   * Gets the AccessibleContext associated with this <code>TextArea</code>.
   * The context is created, if necessary.
   *
   * @return the associated context
   */
  public AccessibleContext getAccessibleContext()
  {
    /* Create the context if this is the first request */
    if (accessibleContext == null)
      accessibleContext = new AccessibleAWTTextArea();
    return accessibleContext;
  }
}