edu.buffalo.cse.green.util.IModifiableBuffer.java Source code

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Here is the source code for edu.buffalo.cse.green.util.IModifiableBuffer.java

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/* This file is part of Green.
 *
 * Copyright (C) 2005 The Research Foundation of State University of New York
 * All Rights Under Copyright Reserved, The Research Foundation of S.U.N.Y.
 * 
 * Green is free software, licensed under the terms of the Eclipse
 * Public License, version 1.0.  The license is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */

package edu.buffalo.cse.green.util;

import org.eclipse.jdt.core.IBuffer;
import org.eclipse.jface.text.AbstractDocument;
import org.eclipse.jface.text.DefaultLineTracker;
import org.eclipse.jface.text.ILineTracker;
import org.eclipse.jface.text.ITextStore;

/**
 * Basic {@link org.eclipse.jface.text.IDocument IDocument} support for source
 * code compilation units. Adapted from
 * {@link org.eclipse.jface.text.Document Document}.
 * 
 * @author evertwoo
 */
public class IModifiableBuffer extends AbstractDocument {
    public IModifiableBuffer(IBuffer buffer) {
        setTextStore(new BufferModifierStore(buffer));
        ILineTracker lineTracker = new DefaultLineTracker();
        lineTracker.set(buffer.getContents());
        setLineTracker(lineTracker);
        completeInitialization();
    }

    /**
     * Stores the modified contents of the buffer.
     * 
     * @author evertwoo
     */
    class BufferModifierStore implements ITextStore {
        private IBuffer _buffer;

        public BufferModifierStore(IBuffer buffer) {
            _buffer = buffer;
        }

        /**
         * @see org.eclipse.jface.text.ITextStore#get(int)
         */
        public char get(int offset) {
            return _buffer.getChar(offset);
        }

        /**
         * @see org.eclipse.jface.text.ITextStore#get(int, int)
         */
        public String get(int offset, int length) {
            return _buffer.getText(offset, length);
        }

        /**
         * @see org.eclipse.jface.text.ITextStore#getLength()
         */
        public int getLength() {
            return _buffer.getLength();
        }

        /**
         * @see org.eclipse.jface.text.ITextStore#replace(int, int, java.lang.String)
         */
        public void replace(int offset, int length, String text) {
            _buffer.replace(offset, length, text);
        }

        /**
         * @see org.eclipse.jface.text.ITextStore#set(java.lang.String)
         */
        public void set(String text) {
            _buffer.setContents(text);
        }
    }
}