| /* TabSet.java -- |
| Copyright (C) 2004, 2006, Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package javax.swing.text; |
| |
| import java.io.Serializable; |
| |
| /** |
| * A set of tab stops. Instances of this class are immutable. |
| */ |
| public class TabSet implements Serializable |
| { |
| /** The serialization UID (compatible with JDK1.5). */ |
| private static final long serialVersionUID = 2367703481999080593L; |
| |
| /** Storage for the tab stops. */ |
| TabStop[] tabs; |
| |
| /** |
| * Creates a new <code>TabSet</code> containing the specified tab stops. |
| * |
| * @param t the tab stops (<code>null</code> permitted). |
| */ |
| public TabSet(TabStop[] t) |
| { |
| if (t != null) |
| tabs = (TabStop[]) t.clone(); |
| else |
| tabs = new TabStop[0]; |
| } |
| |
| /** |
| * Returns the tab stop with the specified index. |
| * |
| * @param i the index. |
| * |
| * @return The tab stop. |
| * |
| * @throws IllegalArgumentException if <code>i</code> is not in the range |
| * <code>0</code> to <code>getTabCount() - 1</code>. |
| */ |
| public TabStop getTab(int i) |
| { |
| if (i < 0 || i >= tabs.length) |
| throw new IllegalArgumentException("Index out of bounds."); |
| return tabs[i]; |
| } |
| |
| /** |
| * Returns the tab following the specified location. |
| * |
| * @param location the location. |
| * |
| * @return The tab following the specified location (or <code>null</code>). |
| */ |
| public TabStop getTabAfter(float location) |
| { |
| int idx = getTabIndexAfter(location); |
| if (idx == -1) |
| return null; |
| else |
| return tabs[idx]; |
| } |
| |
| /** |
| * Returns the number of tab stops in this tab set. |
| * |
| * @return The number of tab stops in this tab set. |
| */ |
| public int getTabCount() |
| { |
| return tabs.length; |
| } |
| |
| /** |
| * Returns the index of the specified tab, or -1 if the tab is not found. |
| * |
| * @param tab the tab (<code>null</code> permitted). |
| * |
| * @return The index of the specified tab, or -1. |
| */ |
| public int getTabIndex(TabStop tab) |
| { |
| for (int i = 0; i < tabs.length; ++i) |
| if (tabs[i] == tab) |
| return i; |
| return -1; |
| } |
| |
| /** |
| * Returns the index of the tab at or after the specified location. |
| * |
| * @param location the tab location. |
| * |
| * @return The index of the tab stop, or -1. |
| */ |
| public int getTabIndexAfter(float location) |
| { |
| for (int i = 0; i < tabs.length; i++) |
| { |
| if (location <= tabs[i].getPosition()) |
| return i; |
| } |
| return -1; |
| } |
| |
| /** |
| * Tests this <code>TabSet</code> for equality with an arbitrary object. |
| * |
| * @param obj the object (<code>null</code> permitted). |
| * |
| * @return <code>true</code> if this <code>TabSet</code> is equal to |
| * <code>obj</code>, and <code>false</code> otherwise. |
| * |
| * @since 1.5 |
| */ |
| public boolean equals(Object obj) |
| { |
| if (obj == this) |
| return true; |
| if (!(obj instanceof TabSet)) |
| return false; |
| TabSet that = (TabSet) obj; |
| int tabCount = getTabCount(); |
| if (tabCount != that.getTabCount()) |
| return false; |
| for (int i = 0; i < tabCount; i++) |
| { |
| if (!this.getTab(i).equals(that.getTab(i))) |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Returns a hash code for this <code>TabSet</code>. |
| * |
| * @return A hash code. |
| * |
| * @since 1.5 |
| */ |
| public int hashCode() |
| { |
| // this hash code won't match Sun's, but that shouldn't matter... |
| int result = 193; |
| int tabs = getTabCount(); |
| for (int i = 0; i < tabs; i++) |
| { |
| TabStop t = getTab(i); |
| if (t != null) |
| result = 37 * result + t.hashCode(); |
| } |
| return result; |
| } |
| |
| /** |
| * Returns a string representation of this <code>TabSet</code>. |
| * |
| * @return A string representation of this <code>TabSet</code>. |
| */ |
| public String toString() |
| { |
| StringBuffer sb = new StringBuffer(); |
| sb.append("[ "); |
| for (int i = 0; i < tabs.length; ++i) |
| { |
| if (i != 0) |
| sb.append(" - "); |
| sb.append(tabs[i].toString()); |
| } |
| sb.append(" ]"); |
| return sb.toString(); |
| } |
| } |