/* * Copyright (c) 1998, 2000, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.swing.text;  /** * Interface for <code>View</code>s that have size dependent upon tabs. * * @author  Timothy Prinzing * @author  Scott Violet * @see TabExpander * @see LabelView * @see ParagraphView */public interface TabableView {     /**     * Determines the desired span when using the given     * tab expansion implementation.  If a container     * calls this method, it will do so prior to the     * normal layout which would call getPreferredSpan.     * A view implementing this should give the same     * result in any subsequent calls to getPreferredSpan     * along the axis of tab expansion.     *     * @param x the position the view would be located     *  at for the purpose of tab expansion >= 0.     * @param e how to expand the tabs when encountered.     * @return the desired span >= 0     */    float getTabbedSpan(float x, TabExpander e);     /**     * Determines the span along the same axis as tab     * expansion for a portion of the view.  This is     * intended for use by the TabExpander for cases     * where the tab expansion involves aligning the     * portion of text that doesn't have whitespace     * relative to the tab stop.  There is therefore     * an assumption that the range given does not     * contain tabs.     *     * @param p0 the starting location in the text document >= 0     * @param p1 the ending location in the text document >= p0     * @return the span >= 0     */    float getPartialSpan(int p0, int p1);}