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/*
* Buffer_Switcher.bsh - a BeanShell macro script for displaying
* and switching between open buffers.
*
* Copyright (C) 2001-2004 Ollie Rutherfurd, [email protected]
*
* :mode=beanshell:tabSize=4:indentSize=4:maxLineLen=0:noTabs=false:
* :indentOnTab=true:indentOnEnter=true:folding=explicit:collapseFolds=1:
*
* {{{ License
* This program 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
* of the License, or any later version.
*
* This program 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 the jEdit program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
* }}}
*
* Notes:
*
* This is very similar to the functionality provided by the BufferList
* plugin but, that is overkill for me.  I just want a way I can
* see and switch between buffers without having to use the mouse
* to go to the BufferSwitcher widget in the EditPane.
*
* DELETE: closes the selected buffer but not the dialog.
* ENTER: switches to the selected buffer and closes the dialog.
* ESCAPE: closes the dialog.
* SPACE: switches to the selected buffer but does not close the dialog.
*
* $Id: Buffer_Switcher.bsh 21769 2012-06-07 15:09:15Z k_satoda $
*/

import javax.swing.border.EmptyBorder;

//Localization
final static String OpenBuffersLabel   = jEdit.getProperty("macro.rs.BufferSwitcher.OpenBuffers.label",  "open Buffers");
final static String QuickHelpLabel   = jEdit.getProperty("macro.rs.BufferSwitcher.QuickHelp.label",  "[ENTER] Switch to; [SPACE] Switch to, keep dialog; [DEL] Close Buffer");
final static String Help1Label   = jEdit.getProperty("macro.rs.BufferSwitcher.Help1.label",  "Help for Buffer Switcher macro:");
final static String Help2Label   = jEdit.getProperty("macro.rs.BufferSwitcher.Help2.label",  "DELETE closes selected buffer.");
final static String Help3Label   = jEdit.getProperty("macro.rs.BufferSwitcher.Help3.label",  "ENTER switches to selected buffer, closes dialog.");
final static String Help4Label   = jEdit.getProperty("macro.rs.BufferSwitcher.Help4.label",  "ESCAPE closes dialog.");
final static String Help5Label   = jEdit.getProperty("macro.rs.BufferSwitcher.Help5.label",  "SPACE switches to selected buffer, does not close dialog.");
final static String Help6Label   = jEdit.getProperty("macro.rs.BufferSwitcher.Help6.label",  "NOTE: This dialog will only be displayed once");

/*
* Custom Cell Renderer which displays the buffer icons in the JList.
* As it runs a little slowly on my machine, it is not used by default.
*
* set useCustomCellRenderer to true at the bottom of this macro to use this.
*/
// {{{ BufferCellRenderer
BufferCellRenderer()
{

l = new JLabel();
l.setOpaque(true);

Component getListCellRendererComponent(
  JList list,
  Object value,
  int index,
  boolean isSelected,
  boolean cellHasFocus)
{
  l.setText(value.toString());
  l.setIcon(value.getIcon());

  if (isSelected)
  {
   l.setBackground(list.getSelectionBackground());
   l.setForeground(list.getSelectionForeground());
  }
  else
  {
   l.setBackground(list.getBackground());
   l.setForeground(list.getForeground());
  }

  return l;

}

return this;
} // }}}

/*
* BufferSwitcherDialog - Dialog allows one to switch between
* open buffers (and/or close open buffers).
*/
BufferSwitcherDialog(doModal, useCustomCellRenderer)
{

// {{{ create dialog
Buffer[] openBuffers = jEdit.getBuffers();
int numOpen = openBuffers.length;
dialog = new JDialog(view, numOpen + " " + OpenBuffersLabel, doModal);
content = new JPanel(new BorderLayout());
content.setBorder(new EmptyBorder(12,12,12,12));
dialog.setContentPane(content);

bufferList = new JList(openBuffers);
bufferList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
if(useCustomCellRenderer)
  bufferList.setCellRenderer(BufferCellRenderer());
content.add(new JScrollPane(bufferList), BorderLayout.CENTER);

content.add(new JLabel(QuickHelpLabel), BorderLayout.NORTH);

buttonPanel = new JPanel();
buttonPanel.setLayout(new BoxLayout(buttonPanel,
  BoxLayout.X_AXIS));

buttonPanel.setBorder(new EmptyBorder(12,50,0,50));
buttonPanel.add(Box.createGlue());
ok = new JButton("OK");
close = new JButton("Close");
ok.setPreferredSize(close.getPreferredSize());
dialog.getRootPane().setDefaultButton(ok);
buttonPanel.add(ok);
buttonPanel.add(Box.createHorizontalStrut(6));
buttonPanel.add(close);
buttonPanel.add(Box.createGlue());
content.add(buttonPanel, BorderLayout.SOUTH);
// }}}

// {{{ switchBuffer()
void switchBuffer()
{
  _buffer = bufferList.getSelectedValue();
  if(_buffer == null)
   view.getToolkit().beep();
  else
   view.getEditPane().setBuffer(_buffer);
} // }}}

// {{{ closeBuffer()
void closeBuffer()
{
  index = bufferList.getSelectedIndex();
  _buffer = bufferList.getSelectedValue();
  if(_buffer == null)
   view.getToolkit().beep();
  else
   if(jEdit.closeBuffer(view, _buffer))
   {
    bufferList.setListData(jEdit.getBuffers());
    if(index == jEdit.getBufferCount())
     index--;
    bufferList.setSelectedIndex(index);
   }
  numOpen--;
  dialog.setTitle("" + numOpen + " Open Buffers");
} // }}}

// {{{ actionPerformed
void actionPerformed(evt)
{
  if(evt.getSource() == ok)
   switchBuffer();
  dialog.dispose();
  dialog = null;
} // }}}

// {{{ KeyListener implementation
void keyPressed(evt)
{
  if(evt.getKeyCode() == KeyEvent.VK_ESCAPE)
   dialog.dispose();
  else if(evt.getKeyCode() == KeyEvent.VK_SPACE)
   switchBuffer();
  else if(evt.getKeyCode() == KeyEvent.VK_DELETE)
  {
   evt.consume();
   closeBuffer();
  }
}

void keyReleased(evt)
{
  int selected = bufferList.getSelectedIndex();
  if(selected > -1)
   bufferList.ensureIndexIsVisible(selected);
}

void keyTyped(evt){}
// }}}

// {{{ MouseListener implementation
void mouseClicked(evt)
{
  if(evt.getClickCount() > 1)
  {
   switchBuffer();
   dialog.dispose();
  }
}

void mouseEntered(evt){}
void mouseExited(evt){}
void mousePressed(evt){}
void mouseReleased(evt){}
// }}}

// {{{ add listeners
dialog.addKeyListener(this);
bufferList.addKeyListener(this);
bufferList.addMouseListener(this);
ok.addActionListener(this);
close.addActionListener(this);
// }}}

// {{{ display dialog
dialog.pack();
bufferList.setSelectedValue(buffer,true);
dialog.setLocationRelativeTo(view);
dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
dialog.setVisible(true);
// }}}

}

// SETTINGS {{{
doModal = true;

// whether or not to use custom CellRenderer
useCustomCellRenderer = true;

// show help for keys on first run
showHelp = jEdit.getProperty("macro.buffer_switcher.display-help","1");
if(showHelp.equals("1"))
{
Macros.message(view, Help1Label + "\n\n"
  + Help2Label + "\n"
  + Help3Label + "\n"
  + Help4Label + "\n"
  + Help5Label + "\n\n"
  + Help6Label);
jEdit.setProperty("macro.buffer_switcher.display-help","0");
}
// }}}

BufferSwitcherDialog(doModal, useCustomCellRenderer);

/*

Macro index data (in DocBook format)

<listitem>
<para><filename>Buffer_Switcher</filename></para>
Displays a modal dialog listing all open buffers,
allowing one to switch to and/or close buffers.
<keycap>ENTER</keycap> switches to a buffer and closes the dialog,
<keycap>DELETE</keycap> closes a buffer, <keycap>SPACE</keycap>
switches to a buffer but does not close the dialog.
</para></abstract>
</listitem>

*/

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