/jEdit/tags/jedit-4-1-pre5/org/gjt/sp/jedit/buffer/FoldHandler.java
Java | 182 lines | 72 code | 19 blank | 91 comment | 8 complexity | 50aec4f7bb9c815b970a91da6a778c6e MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*
- * FoldHandler.java - Fold handler interface
- * :tabSize=8:indentSize=8:noTabs=false:
- * :folding=explicit:collapseFolds=1:
- *
- * Copyright (C) 2001 Slava Pestov
- *
- * 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 org.gjt.sp.jedit.buffer;
- import java.util.*;
- import javax.swing.text.Segment;
- import org.gjt.sp.jedit.Buffer;
- import org.gjt.sp.util.Log;
- /**
- * Interface for obtaining the fold level of a specified label.
- * @author Slava Pestov
- * @version $Id: FoldHandler.java 4277 2002-06-22 08:33:00Z spestov $
- * @since jEdit 4.0pre1
- */
- public abstract class FoldHandler
- {
- //{{{ getName() method
- /**
- * Returns the internal name of this FoldHandler
- * @return The internal name of this FoldHandler
- * @since jEdit 4.0pre6
- */
- public String getName()
- {
- return name;
- }
- //}}}
- //{{{ getFoldLevel() method
- /**
- * Returns the fold level of the specified line.
- * @param buffer The buffer in question
- * @param lineIndex The line index
- * @param seg A segment the fold handler can use to obtain any
- * text from the buffer, if necessary
- * @return The fold level of the specified line
- * @since jEdit 4.0pre1
- */
- public abstract int getFoldLevel(Buffer buffer, int lineIndex, Segment seg);
- //}}}
- //{{{ equals() method
- /**
- * Returns if the specified fold handler is equal to this one.
- * @param o The object
- */
- public boolean equals(Object o)
- {
- // Default implementation... subclasses can extend this.
- if(o == null)
- return false;
- else
- return getClass() == o.getClass();
- } //}}}
- //{{{ registerFoldHandler() method
- /**
- * Adds a fold handler to the list of registered handlers
- * @param handler The fold handler to add
- * @since jEdit 4.0pre6
- */
- public static void registerFoldHandler(FoldHandler handler)
- {
- if (getFoldHandler(handler.getName()) != null)
- {
- Log.log(Log.ERROR, FoldHandler.class, "Cannot register more than one fold handler with the same name");
- return;
- }
- foldHandlers.add(handler);
- }
- //}}}
- //{{{ unregisterFoldHandler() method
- /**
- * Removes a fold handler from the list of registered handlers
- * @param handler The fold handler to add
- * @since jEdit 4.1pre2
- */
- public static void unregisterFoldHandler(FoldHandler handler)
- {
- foldHandlers.remove(handler);
- }
- //}}}
- //{{{ getFoldHandlers() method
- /**
- * Returns an array containing the list of registered fold handlers
- * @since jEdit 4.0pre6
- */
- public static FoldHandler[] getFoldHandlers()
- {
- FoldHandler[] handlers = new FoldHandler[foldHandlers.size()];
- return (FoldHandler[])foldHandlers.toArray(handlers);
- }
- //}}}
- //{{{ getFoldHandler() method
- /**
- * Returns the fold handler with the specified name, or null if
- * there is no registered handler with that name.
- * @param name The name of the desired fold handler
- * @since jEdit 4.0pre6
- */
- public static FoldHandler getFoldHandler(String name)
- {
- FoldHandler handler;
- Iterator i = foldHandlers.iterator();
- while (i.hasNext())
- {
- handler = (FoldHandler)i.next();
- if (name.equals(handler.getName())) return handler;
- }
- return null;
- }
- //}}}
- //{{{ getFoldModes() method
- /**
- * Returns an array containing the names of all registered fold handlers
- * @since jEdit 4.0pre6
- */
- public static String[] getFoldModes()
- {
- FoldHandler[] handlers = getFoldHandlers();
- String[] foldModes = new String[handlers.length];
- for (int i = 0; i < foldModes.length; i++)
- {
- foldModes[i] = handlers[i].getName();
- }
- return foldModes;
- }
- //}}}
- //{{{ FoldHandler() constructor
- protected FoldHandler(String name)
- {
- this.name = name;
- }
- //}}}
- //{{{ Private members
- private String name;
- private static ArrayList foldHandlers;
- //}}}
- //{{{ Static initializer
- static
- {
- foldHandlers = new ArrayList();
- registerFoldHandler(new DummyFoldHandler());
- registerFoldHandler(new IndentFoldHandler());
- registerFoldHandler(new ExplicitFoldHandler());
- }
- //}}}
- }