/*
 * Search_Ruby_documentation.bsh v0.4
 *
 * Copyright 2004 Robert McKinnon
 *
 * Modified by Jim Morris to use qri (which is faster) and to offer a selectable list
 * where more than one match is found.
 *
 * 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
/*
 * Allows user to search Ruby documentation using qri - Ruby interactive reference. 
 *  - Brings up dialog for user to enter search term.
 *  - Macro runs ri on term, and reports ri results in another dialog.
 *  - Remembers last term searched, and places it in search entry field.
 *  - If user has text selected, then that is placed in search entry field instead.
 */

import java.util.Timer;
import javax.swing.border.EmptyBorder;

listResults(String txt, String [] result)
{
	result[0]= "";
	
	// {{{ create dialog
	l= txt.split(",");
	Vector names = new Vector();
	// split txt into a list separated by comma
	l= txt.split(",");
	for(int i=0; i <l.length; i++)
	{
		name = l[i].trim();
		if(!name.equals(""))
		{
			names.addElement(name);
		}
	}
	dialog = new JDialog(view, "Select Docs on", true);
	content = new JPanel(new BorderLayout());
	content.setBorder(new EmptyBorder(12,12,12,12));
	dialog.setContentPane(content);

	bufferList = new JList(names);
	bufferList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
	content.add(new JScrollPane(bufferList), BorderLayout.CENTER);

	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 doShow()
	{
		term = bufferList.getSelectedValue();
		Log.log(Log.DEBUG, BeanShell.class, "in doshow selected: " + term);
		result[0]= term;
	}	// }}}

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

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

	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)
		{
			doShow();
			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.setSelectedIndex(0);
	dialog.setLocationRelativeTo(view);
	dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
	dialog.setVisible(true);
	// }}}

}

/**
 * Runs supplied system command and returns process object.
 */
run(command) {
    Process process = Runtime.getRuntime().exec(command);
    
    java.util.Timer timer = new java.util.Timer();
    TimerTask task = new TimerTask() {
        public void run() {
            synchronized(process) {
                // kills blocked subprocess
                process.destroy();
            }
        }

    };
    timer.schedule(task, 1500);
    
    process.waitFor();
    
    synchronized(process) {
        task.cancel();
    }
 
    return process;
}

/**
 * Returns string output of execution of the supplied system command.
 */
getOutput(command) throws IOException, InterruptedException {
    process = run(command);
    reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
    buffer = new StringBuffer();

    if(reader.ready()) {
        buffer.append(reader.readLine());
        while(reader.ready()) {
            buffer.append('\n' + reader.readLine());
        }
    }
    reader.close();
    
    reader = new BufferedReader(new InputStreamReader(process.getErrorStream()));

    if(reader.ready()) {
        buffer.append(reader.readLine());
        while(reader.ready()) {
            buffer.append('\n' + reader.readLine());
        }
    }
    reader.close();
    
    if(buffer.length() == 0)
        return "Error:\nri output overflowed native platform's standard input stream buffer.";
    else 
        return buffer.toString();
}

/**
 * Runs ri on supplied string search term and returns result string.
 */
ri(searchTerm) {
    if(searchTerm.length() == 0)
        searchTerm = "-l";
    str= getOutput("qri -f plain -T " + searchTerm);
    return str;
}

getScrollPane(label, closeAction) {
    scrollPane = new JScrollPane(label);
    final String CLOSE = "close";
    scrollPane.getActionMap().put(CLOSE, closeAction);

    InputMap inputMap = scrollPane.getInputMap();
    inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), CLOSE);
    inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0), CLOSE);
    inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), CLOSE);
    return scrollPane;
}
    
showDialog(frame, title, text) {
    final JDialog dialog = new JDialog(frame, title, false);
    label = new JTextArea(text);
    label.setEditable(false);
    label.setBackground(dialog.getContentPane().getBackground());
    pane = getScrollPane(label, new AbstractAction() {
        public void actionPerformed(ActionEvent e) {
            dialog.setVisible(false);
            dialog.dispose();
        }
    });

    dialog.setContentPane(pane);
    dialog.pack();
    
    height = dialog.getHeight();    
    if(dialog.getHeight() > frame.getHeight()*.8) {
        height = (int)(frame.getHeight()*.8);
    }

    dialog.setSize((int)(dialog.getWidth() *1.05), height);
    dialog.setLocationRelativeTo(frame);

    dialog.show();
}

/**
 * Displays dialog for user to enter search term.
 */
getSearchTerm() {
  term = textArea.getSelectedText();
  
  if(term == null) {
    term = jEdit.getProperty("ruby-ri-search-term", "");
    term = Macros.input(view, "Search for:", term);
  }
  
  return term;
}

cc_ri(searchTerm) {
  return getCommandOutput("/home/aaa/.jedit/macros/Ruby/cc_ri " + searchTerm);
}

/**
 * Performs Ruby documentation search.
 */
doSearch() {
  term = getSearchTerm();
  if(term != null) {
    jEdit.setProperty("ruby-ri-search-term", term);
    r= ri(term);
    if(r.equals("nil")){
	    Macros.error(view, "No Results found");
	    return;
    }
    if((off=r.indexOf("Multiple choices:")) != -1){
	    // need to offer list of options
	    str= r.substring(off+19);
	    res= new String[1];
	    listResults(str, res);
	    if(res[0] != "")
		    r= ri(res[0]);
	    else
		    r= "";
    }
    
    if(r != "")
	    showDialog(view, "", r);
  }
}

doSearch();