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TabableView.java
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1998-06-30
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/*
* @(#)TabableView.java 1.2 98/04/09
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.swing.text;
/**
* Interface for View's that have size dependant
* upon tabs.
*
* @author Timothy Prinzing
* @author Scott Violet
* @version 1.2 04/09/98
* @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);
}