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1: /* TabSet.java -- 2: Copyright (C) 2004, 2006, Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package javax.swing.text; 39: 40: import java.io.Serializable; 41: 42: /** 43: * A set of tab stops. Instances of this class are immutable. 44: */ 45: public class TabSet implements Serializable 46: { 47: /** The serialization UID (compatible with JDK1.5). */ 48: private static final long serialVersionUID = 2367703481999080593L; 49: 50: /** Storage for the tab stops. */ 51: TabStop[] tabs; 52: 53: /** 54: * Creates a new <code>TabSet</code> containing the specified tab stops. 55: * 56: * @param t the tab stops (<code>null</code> permitted). 57: */ 58: public TabSet(TabStop[] t) 59: { 60: if (t != null) 61: tabs = (TabStop[]) t.clone(); 62: else 63: tabs = new TabStop[0]; 64: } 65: 66: /** 67: * Returns the tab stop with the specified index. 68: * 69: * @param i the index. 70: * 71: * @return The tab stop. 72: * 73: * @throws IllegalArgumentException if <code>i</code> is not in the range 74: * <code>0</code> to <code>getTabCount() - 1</code>. 75: */ 76: public TabStop getTab(int i) 77: { 78: if (i < 0 || i >= tabs.length) 79: throw new IllegalArgumentException("Index out of bounds."); 80: return tabs[i]; 81: } 82: 83: /** 84: * Returns the tab following the specified location. 85: * 86: * @param location the location. 87: * 88: * @return The tab following the specified location (or <code>null</code>). 89: */ 90: public TabStop getTabAfter(float location) 91: { 92: int idx = getTabIndexAfter(location); 93: if (idx == -1) 94: return null; 95: else 96: return tabs[idx]; 97: } 98: 99: /** 100: * Returns the number of tab stops in this tab set. 101: * 102: * @return The number of tab stops in this tab set. 103: */ 104: public int getTabCount() 105: { 106: return tabs.length; 107: } 108: 109: /** 110: * Returns the index of the specified tab, or -1 if the tab is not found. 111: * 112: * @param tab the tab (<code>null</code> permitted). 113: * 114: * @return The index of the specified tab, or -1. 115: */ 116: public int getTabIndex(TabStop tab) 117: { 118: for (int i = 0; i < tabs.length; ++i) 119: if (tabs[i] == tab) 120: return i; 121: return -1; 122: } 123: 124: /** 125: * Returns the index of the tab at or after the specified location. 126: * 127: * @param location the tab location. 128: * 129: * @return The index of the tab stop, or -1. 130: */ 131: public int getTabIndexAfter(float location) 132: { 133: for (int i = 0; i < tabs.length; i++) 134: { 135: if (location <= tabs[i].getPosition()) 136: return i; 137: } 138: return -1; 139: } 140: 141: /** 142: * Tests this <code>TabSet</code> for equality with an arbitrary object. 143: * 144: * @param obj the object (<code>null</code> permitted). 145: * 146: * @return <code>true</code> if this <code>TabSet</code> is equal to 147: * <code>obj</code>, and <code>false</code> otherwise. 148: * 149: * @since 1.5 150: */ 151: public boolean equals(Object obj) 152: { 153: if (obj == this) 154: return true; 155: if (!(obj instanceof TabSet)) 156: return false; 157: TabSet that = (TabSet) obj; 158: int tabCount = getTabCount(); 159: if (tabCount != that.getTabCount()) 160: return false; 161: for (int i = 0; i < tabCount; i++) 162: { 163: if (!this.getTab(i).equals(that.getTab(i))) 164: return false; 165: } 166: return true; 167: } 168: 169: /** 170: * Returns a hash code for this <code>TabSet</code>. 171: * 172: * @return A hash code. 173: * 174: * @since 1.5 175: */ 176: public int hashCode() 177: { 178: // this hash code won't match Sun's, but that shouldn't matter... 179: int result = 193; 180: int tabs = getTabCount(); 181: for (int i = 0; i < tabs; i++) 182: { 183: TabStop t = getTab(i); 184: if (t != null) 185: result = 37 * result + t.hashCode(); 186: } 187: return result; 188: } 189: 190: /** 191: * Returns a string representation of this <code>TabSet</code>. 192: * 193: * @return A string representation of this <code>TabSet</code>. 194: */ 195: public String toString() 196: { 197: StringBuffer sb = new StringBuffer(); 198: sb.append("[ "); 199: for (int i = 0; i < tabs.length; ++i) 200: { 201: if (i != 0) 202: sb.append(" - "); 203: sb.append(tabs[i].toString()); 204: } 205: sb.append(" ]"); 206: return sb.toString(); 207: } 208: }
GNU Classpath (0.95) |