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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 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 sun.swing; | ||
| 26 | |||
| 27 | import java.awt.Color; | ||
| 28 | import java.awt.Insets; | ||
| 29 | import javax.swing.*; | ||
| 30 | import javax.swing.border.Border; | ||
| 31 | import javax.swing.plaf.ComponentUI; | ||
| 32 | import sun.awt.AppContext; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * DefaultLookup provides a way to customize the lookup done by the | ||
| 36 | * UIManager. The default implementation of DefaultLookup forwards | ||
| 37 | * the call to the UIManager. | ||
| 38 | * <p> | ||
| 39 | * <b>WARNING:</b> While this class is public, it should not be treated as | ||
| 40 | * public API and its API may change in incompatable ways between dot dot | ||
| 41 | * releases and even patch releases. You should not rely on this class even | ||
| 42 | * existing. | ||
| 43 | * | ||
| 44 | * @author Scott Violet | ||
| 45 | */ | ||
| 46 | public class DefaultLookup { | ||
| 47 | /** | ||
| 48 | * Key used to store DefaultLookup for AppContext. | ||
| 49 | */ | ||
| 50 | private static final Object DEFAULT_LOOKUP_KEY = new | ||
| 51 | StringBuffer("DefaultLookup"); | ||
| 52 | /** | ||
| 53 | * Thread that last asked for a default. | ||
| 54 | */ | ||
| 55 | private static Thread currentDefaultThread; | ||
| 56 | /** | ||
| 57 | * DefaultLookup for last thread. | ||
| 58 | */ | ||
| 59 | private static DefaultLookup currentDefaultLookup; | ||
| 60 | |||
| 61 | /** | ||
| 62 | * If true, a custom DefaultLookup has been set. | ||
| 63 | */ | ||
| 64 | private static boolean isLookupSet; | ||
| 65 | |||
| 66 | |||
| 67 | /** | ||
| 68 | * Sets the DefaultLookup instance to use for the current | ||
| 69 | * <code>AppContext</code>. Null implies the UIManager should be | ||
| 70 | * used. | ||
| 71 | */ | ||
| 72 | public static void setDefaultLookup(DefaultLookup lookup) { | ||
| 73 | synchronized(DefaultLookup.class) { | ||
| 74 | if (!isLookupSet && lookup == null) { | ||
| 75 | // Null was passed in, and no one has invoked setDefaultLookup | ||
| 76 | // with a non-null value, we don't need to do anything. | ||
| 77 | return; | ||
| 78 | } | ||
| 79 | else if (lookup == null) { | ||
| 80 | // null was passed in, but someone has invoked setDefaultLookup | ||
| 81 | // with a non-null value, use an instance of DefautLookup | ||
| 82 | // which will fallback to UIManager. | ||
| 83 | lookup = new DefaultLookup(); | ||
| 84 | } | ||
| 85 | isLookupSet = true; | ||
| 86 | AppContext.getAppContext().put(DEFAULT_LOOKUP_KEY, lookup); | ||
| 87 | currentDefaultThread = Thread.currentThread(); | ||
| 88 | currentDefaultLookup = lookup; | ||
| 89 | } | ||
| 90 | } | ||
| 91 | |||
| 92 | public static Object get(JComponent c, ComponentUI ui, String key) { | ||
| 93 | boolean lookupSet; | ||
| 94 | synchronized(DefaultLookup.class) { | ||
| 95 | lookupSet = isLookupSet; | ||
| 96 | } | ||
| 97 | if (!lookupSet) { | ||
| 98 | // No one has set a valid DefaultLookup, use UIManager. | ||
| 99 | return UIManager.get(key, c.getLocale()); | ||
| 100 | } | ||
| 101 | Thread thisThread = Thread.currentThread(); | ||
| 102 | DefaultLookup lookup; | ||
| 103 | synchronized(DefaultLookup.class) { | ||
| 104 | // See if we've already cached the DefaultLookup for this thread, | ||
| 105 | // and use it if we have. | ||
| 106 | if (thisThread == currentDefaultThread) { | ||
| 107 | // It is cached, use it. | ||
| 108 | lookup = currentDefaultLookup; | ||
| 109 | } | ||
| 110 | else { | ||
| 111 | // Not cached, get the DefaultLookup to use from the AppContext | ||
| 112 | lookup = (DefaultLookup)AppContext.getAppContext().get( | ||
| 113 | DEFAULT_LOOKUP_KEY); | ||
| 114 | if (lookup == null) { | ||
| 115 | // Fallback to DefaultLookup, which will redirect to the | ||
| 116 | // UIManager. | ||
| 117 | lookup = new DefaultLookup(); | ||
| 118 | AppContext.getAppContext().put(DEFAULT_LOOKUP_KEY, lookup); | ||
| 119 | } | ||
| 120 | // Cache the values to make the next lookup easier. | ||
| 121 | currentDefaultThread = thisThread; | ||
| 122 | currentDefaultLookup = lookup; | ||
| 123 | } | ||
| 124 | } | ||
| 125 | return lookup.getDefault(c, ui, key); | ||
| 126 | } | ||
| 127 | |||
| 128 | // | ||
| 129 | // The following are convenience method that all use getDefault. | ||
| 130 | // | ||
| 131 | public static int getInt(JComponent c, ComponentUI ui, String key, | ||
| 132 | int defaultValue) { | ||
| 133 | Object iValue = get(c, ui, key); | ||
| 134 | |||
| 135 | if (iValue == null || !(iValue instanceof Number)) { | ||
| 136 | return defaultValue; | ||
| 137 | } | ||
| 138 | return ((Number)iValue).intValue(); | ||
| 139 | } | ||
| 140 | |||
| 141 | public static int getInt(JComponent c, ComponentUI ui, String key) { | ||
| 142 | return getInt(c, ui, key, -1); | ||
| 143 | } | ||
| 144 | |||
| 145 | public static Insets getInsets(JComponent c, ComponentUI ui, String key, | ||
| 146 | Insets defaultValue) { | ||
| 147 | Object iValue = get(c, ui, key); | ||
| 148 | |||
| 149 | if (iValue == null || !(iValue instanceof Insets)) { | ||
| 150 | return defaultValue; | ||
| 151 | } | ||
| 152 | return (Insets)iValue; | ||
| 153 | } | ||
| 154 | |||
| 155 | public static Insets getInsets(JComponent c, ComponentUI ui, String key) { | ||
| 156 | return getInsets(c, ui, key, null); | ||
| 157 | } | ||
| 158 | |||
| 159 | public static boolean getBoolean(JComponent c, ComponentUI ui, String key, | ||
| 160 | boolean defaultValue) { | ||
| 161 | Object iValue = get(c, ui, key); | ||
| 162 | |||
| 163 | if (iValue == null || !(iValue instanceof Boolean)) { | ||
| 164 | return defaultValue; | ||
| 165 | } | ||
| 166 | return ((Boolean)iValue).booleanValue(); | ||
| 167 | } | ||
| 168 | |||
| 169 | public static boolean getBoolean(JComponent c, ComponentUI ui, String key) { | ||
| 170 | return getBoolean(c, ui, key, false); | ||
| 171 | } | ||
| 172 | |||
| 173 | public static Color getColor(JComponent c, ComponentUI ui, String key, | ||
| 174 | Color defaultValue) { | ||
| 175 | Object iValue = get(c, ui, key); | ||
| 176 | |||
| 177 | if (iValue == null || !(iValue instanceof Color)) { | ||
| 178 | return defaultValue; | ||
| 179 | } | ||
| 180 | return (Color)iValue; | ||
| 181 | } | ||
| 182 | |||
| 183 | public static Color getColor(JComponent c, ComponentUI ui, String key) { | ||
| 184 | return getColor(c, ui, key, null); | ||
| 185 | } | ||
| 186 | |||
| 187 | public static Icon getIcon(JComponent c, ComponentUI ui, String key, | ||
| 188 | Icon defaultValue) { | ||
| 189 | Object iValue = get(c, ui, key); | ||
| 190 | if (iValue == null || !(iValue instanceof Icon)) { | ||
| 191 | return defaultValue; | ||
| 192 | } | ||
| 193 | return (Icon)iValue; | ||
| 194 | } | ||
| 195 | |||
| 196 | public static Icon getIcon(JComponent c, ComponentUI ui, String key) { | ||
| 197 | return getIcon(c, ui, key, null); | ||
| 198 | } | ||
| 199 | |||
| 200 | public static Border getBorder(JComponent c, ComponentUI ui, String key, | ||
| 201 | Border defaultValue) { | ||
| 202 | Object iValue = get(c, ui, key); | ||
| 203 | if (iValue == null || !(iValue instanceof Border)) { | ||
| 204 | return defaultValue; | ||
| 205 | } | ||
| 206 | return (Border)iValue; | ||
| 207 | } | ||
| 208 | |||
| 209 | public static Border getBorder(JComponent c, ComponentUI ui, String key) { | ||
| 210 | return getBorder(c, ui, key, null); | ||
| 211 | } | ||
| 212 | |||
| 213 | public Object getDefault(JComponent c, ComponentUI ui, String key) { | ||
| 214 | // basic | ||
| 215 | return UIManager.get(key, c.getLocale()); | ||
| 216 | } | ||
| 217 | } | ||