SchemeMode.java :  » IDE » J » org » armedbear » j » Java Open Source

/*
 * SchemeMode.java
 *
 * Copyright (C) 1998-2002 Peter Graves
 * $Id: SchemeMode.java,v 1.1.1.1 2002/09/24 16:09:19 piso Exp $
 *
 * 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 (at your option) 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.armedbear.j;

import java.awt.event.KeyEvent;

public final class SchemeMode extends AbstractMode implements Constants, Mode
{
    private static final SchemeMode mode = new SchemeMode();

    private SchemeMode()
    {
        super(SCHEME_MODE, SCHEME_MODE_NAME);
        keywords = new Keywords(this);
    }

    public static final SchemeMode getMode()
    {
        return mode;
    }

    public final String getCommentStart()
    {
        return "; ";
    }

    public final Formatter getFormatter(Buffer buffer)
    {
        return new SchemeFormatter(buffer);
    }

    protected void setKeyMapDefaults(KeyMap km)
    {
        km.mapKey(KeyEvent.VK_ENTER, 0, "newlineAndIndent");
        km.mapKey(KeyEvent.VK_T, CTRL_MASK, "findTag");
        km.mapKey(KeyEvent.VK_PERIOD, ALT_MASK, "findTagAtDot");
        km.mapKey(KeyEvent.VK_L, CTRL_MASK | SHIFT_MASK, "listTags");
        km.mapKey(')', "closeParen");
    }

    public boolean isTaggable()
    {
        return true;
    }

    public Tagger getTagger(SystemBuffer buffer)
    {
        return new SchemeTagger(buffer);
    }

    private static final String validChars =
        "!$%&*+-./0123456789:<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_abcdefghijklmnopqrstuvwxyz{}~";

    public final boolean isIdentifierStart(char c)
    {
        return validChars.indexOf(c) >= 0;
    }

    public final boolean isIdentifierPart(char c)
    {
        return validChars.indexOf(c) >= 0;
    }

    public boolean isInQuote(Buffer buffer, Position pos)
    {
        // This implementation only considers the current line.
        Line line = pos.getLine();
        int offset = pos.getOffset();
        boolean inQuote = false;
        for (int i = 0; i < offset; i++) {
            char c = line.charAt(i);
            if (c == '\\') {
                // Escape.
                ++i;
            } else if (inQuote) {
                if (c == '"')
                    inQuote = false;
            } else {
                if (c == '"')
                    inQuote = true;
            }
        }
        return inQuote;
    }
}