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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2000, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | package javax.swing.text; | ||
| 26 | |||
| 27 | |||
| 28 | /** | ||
| 29 | * Interface for <code>View</code>s that have size dependent upon tabs. | ||
| 30 | * | ||
| 31 | * @author Timothy Prinzing | ||
| 32 | * @author Scott Violet | ||
| 33 | * @see TabExpander | ||
| 34 | * @see LabelView | ||
| 35 | * @see ParagraphView | ||
| 36 | */ | ||
| 37 | public interface TabableView { | ||
| 38 | |||
| 39 | /** | ||
| 40 | * Determines the desired span when using the given | ||
| 41 | * tab expansion implementation. If a container | ||
| 42 | * calls this method, it will do so prior to the | ||
| 43 | * normal layout which would call getPreferredSpan. | ||
| 44 | * A view implementing this should give the same | ||
| 45 | * result in any subsequent calls to getPreferredSpan | ||
| 46 | * along the axis of tab expansion. | ||
| 47 | * | ||
| 48 | * @param x the position the view would be located | ||
| 49 | * at for the purpose of tab expansion >= 0. | ||
| 50 | * @param e how to expand the tabs when encountered. | ||
| 51 | * @return the desired span >= 0 | ||
| 52 | */ | ||
| 53 | float getTabbedSpan(float x, TabExpander e); | ||
| 54 | |||
| 55 | /** | ||
| 56 | * Determines the span along the same axis as tab | ||
| 57 | * expansion for a portion of the view. This is | ||
| 58 | * intended for use by the TabExpander for cases | ||
| 59 | * where the tab expansion involves aligning the | ||
| 60 | * portion of text that doesn't have whitespace | ||
| 61 | * relative to the tab stop. There is therefore | ||
| 62 | * an assumption that the range given does not | ||
| 63 | * contain tabs. | ||
| 64 | * | ||
| 65 | * @param p0 the starting location in the text document >= 0 | ||
| 66 | * @param p1 the ending location in the text document >= p0 | ||
| 67 | * @return the span >= 0 | ||
| 68 | */ | ||
| 69 | float getPartialSpan(int p0, int p1); | ||
| 70 | } | ||