/bundles/plugins-trunk/Ancestor/src/gatchan/jedit/ancestor/AncestorPlugin.java

/*

 * AncestorPlugin.java - The Ancestor plugin

 * :tabSize=8:indentSize=8:noTabs=false:

 * :folding=explicit:collapseFolds=1:

 *

 * Copyright (C) 2007, 2011 Matthieu Casanova

 *

 * 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.

 */

package gatchan.jedit.ancestor;



import java.awt.Component;

import java.awt.FlowLayout;

import java.lang.reflect.Field;

import java.util.HashMap;

import java.util.Map;

import javax.swing.JComponent;

import javax.swing.JPanel;



import org.gjt.sp.jedit.EditBus;

import org.gjt.sp.jedit.EditPane;

import org.gjt.sp.jedit.EditPlugin;

import org.gjt.sp.jedit.View;

import org.gjt.sp.jedit.jEdit;

import org.gjt.sp.jedit.msg.BufferUpdate;

import org.gjt.sp.jedit.msg.EditPaneUpdate;

import org.gjt.sp.jedit.msg.ViewUpdate;

import org.gjt.sp.util.Log;



/**

 * @author Matthieu Casanova

 * @version $Id: Server.java,v 1.33 2007/01/05 15:15:17 matthieu Exp $

 */

public class AncestorPlugin extends EditPlugin

{

	private final Map<View, AncestorToolBar> viewAncestorToolBar = new HashMap<View, AncestorToolBar>();

	private final Map<View, JComponent> topToolbars = new HashMap<View, JComponent>();



	//{{{ start() method

	@Override

	public void start()

	{

		View[] views = jEdit.getViews();

		for (int i = 0; i < views.length; i++)

		{

			addAncestorToolBar(views[i]);

		}

		EditBus.addToBus(this);

	} //}}}



	//{{{ addAncestorToolBar() method

	private void addAncestorToolBar(View view)

	{

		if (viewAncestorToolBar.containsKey(view))

			return;

		AncestorToolBar ancestorToolBar = new AncestorToolBar(view);

		EditPane editPane = view.getEditPane();

		ancestorToolBar.setBuffer(editPane.getBuffer());



		JComponent toolBar = getViewToolbar(view);

		toolBar.add(ancestorToolBar);

		toolBar.validate();

		topToolbars.put(view, toolBar);

		viewAncestorToolBar.put(view, ancestorToolBar);

	} //}}}



	private JComponent getViewToolbar(View view)

	{

		try

		{

			Field topToolBarsField = view.getClass().getDeclaredField("topToolBars");

			topToolBarsField.setAccessible(true);

			JPanel topToolBars = (JPanel) topToolBarsField.get(view);

			Component[] components = topToolBars.getComponents();



			if (components.length > 1)

			{

				for (int i = 1; i < components.length; i++)

				{

					Component component = components[i];

					if (component instanceof JComponent)

					{

						JComponent toolBar = (JComponent) component;

						if (toolBar.getClientProperty("Ancestor-SmartOpen") == Boolean.TRUE)

							return toolBar;



					}

				}

			}

		}

		catch (NoSuchFieldException e)

		{

			Log.log(Log.ERROR, this, e);

		}

		catch (IllegalAccessException e)

		{

			Log.log(Log.ERROR, this, e);

		}

		JPanel customToolbar = new JPanel(new FlowLayout(FlowLayout.LEADING));

		customToolbar.putClientProperty("Ancestor-SmartOpen", Boolean.TRUE);

		view.addToolBar(customToolbar);

		return customToolbar;

	}



	//{{{ removeAncestorToolBar() method

	private void removeAncestorToolBar(View view)

	{

		AncestorToolBar toolBar = viewAncestorToolBar.get(view);

		JComponent top = topToolbars.get(view);

		top.remove(toolBar);

		if (top.getComponentCount() == 0)

		{

			topToolbars.remove(view);

			view.removeToolBar(top);

		}

		else

		{

			top.validate();

			top.repaint();

		}

		viewAncestorToolBar.remove(view);

	} //}}}



	//{{{ handleViewUpdate() method

	@EditBus.EBHandler

	public void handleViewUpdate(ViewUpdate viewUpdate)

	{

		if (viewUpdate.getWhat() == ViewUpdate.CREATED)

		{

			View view = viewUpdate.getView();

			addAncestorToolBar(view);

		}

		else if (viewUpdate.getWhat() == ViewUpdate.CLOSED)

		{

			viewAncestorToolBar.remove(viewUpdate.getView());

		}

		else if (viewUpdate.getWhat() == ViewUpdate.EDIT_PANE_CHANGED)

		{

			View view = viewUpdate.getView();

			EditPane editPane = view.getEditPane();

			AncestorToolBar bar = viewAncestorToolBar.get(view);

			bar.setBuffer(editPane.getBuffer());

		}

	} //}}}



	//{{{ handleEditPaneUpdate() method

	@EditBus.EBHandler

	public void handleEditPaneUpdate(EditPaneUpdate editPaneUpdate)

	{

		if (editPaneUpdate.getWhat() == EditPaneUpdate.BUFFER_CHANGED)

		{

			EditPane editPane = editPaneUpdate.getEditPane();

			View view = editPane.getView();

			AncestorToolBar bar = viewAncestorToolBar.get(view);

			if (bar == null)

				addAncestorToolBar(view);

			bar = viewAncestorToolBar.get(view);

			bar.setBuffer(editPane.getBuffer());

		}

	} //}}}



	//{{{ handleMessage() method

	@EditBus.EBHandler

	public void handleBufferUpdate(BufferUpdate bufferUpdate)

	{

		// Needed to catch renaming of buffers / saving of new buffers

		if (bufferUpdate.getWhat() == BufferUpdate.SAVED)

		{

			View view = bufferUpdate.getView();

			AncestorToolBar bar = viewAncestorToolBar.get(view);

			bar.setBuffer(bufferUpdate.getBuffer());

		}

	} //}}}



	//{{{ stop() method

	@Override

	public void stop()

	{

		EditBus.removeFromBus(this);

		View[] views = jEdit.getViews();

		for (int i = 0; i < views.length; i++)

		{

			removeAncestorToolBar(views[i]);

		}

	} //}}}

}