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The source code

/*
 * BufferChangeListener.java - Buffer listener interface
 * :tabSize=8:indentSize=8:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * Copyright (C) 2001, 2003 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 org.gjt.sp.jedit.Buffer;

/**
 * A interface for notification of changes to buffer text. While the
 * {@link org.gjt.sp.jedit.msg.BufferUpdate} EditBus message is used for
 * general buffer state changes, this interface is used for events which are
 * fired frequently, or for which performance is essential.

* * Because this interface is subject to change in the future, you * should subclass BufferChangeAdapter instead of * implementing it directly. * * @author Slava Pestov * @version $Id: BufferChangeListener.java,v 1.12 2004/03/28 00:07:26 spestov Exp $ * @since jEdit 4.0pre1 */ public interface BufferChangeListener { //{{{ foldLevelChanged() method /** * Called when line fold levels change. * @param buffer The buffer in question * @param startLine The start line number * @param endLine The end line number * @since jEdit 4.0pre1 */ void foldLevelChanged(Buffer buffer, int startLine, int endLine); //}}} //{{{ contentInserted() method /** * Called when text is inserted into the buffer. * @param buffer The buffer in question * @param startLine The first line * @param offset The start offset, from the beginning of the buffer * @param numLines The number of lines inserted * @param length The number of characters inserted * @since jEdit 4.0pre1 */ void contentInserted(Buffer buffer, int startLine, int offset, int numLines, int length); //}}} //{{{ contentRemoved() method /** * Called when text is removed from the buffer. * @param buffer The buffer in question * @param startLine The first line * @param offset The start offset, from the beginning of the buffer * @param numLines The number of lines removed * @param length The number of characters removed * @since jEdit 4.0pre1 */ void contentRemoved(Buffer buffer, int startLine, int offset, int numLines, int length); //}}} //{{{ preContentRemoved() method /** * Called when text is about to be removed from the buffer, but is * still present. * @param buffer The buffer in question * @param startLine The first line * @param offset The start offset, from the beginning of the buffer * @param numLines The number of lines to be removed * @param length The number of characters to be removed * @since jEdit 4.2pre1 */ public void preContentRemoved(Buffer buffer, int startLine, int offset, int numLines, int length); //}}} //{{{ transactionComplete() method /** * Called after an undo or compound edit has finished. The text area * uses this event to queue up and collapse cleanup operations so they * are only run once during a long transaction (such as a "Replace All" * operation.) * * @param buffer The buffer in question * @since jEdit 4.0pre6 */ void transactionComplete(Buffer buffer); //}}} //{{{ foldHandlerChanged() method /** * Called to notify the text area that folds need to be collapsed if * the "collapseFolds" property is set. This method is called after the * buffer has been loaded, and also if the user changes the fold * handler. * * @param buffer The buffer in question * @since jEdit 4.2pre2 */ void foldHandlerChanged(Buffer buffer); //}}} }

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