/* |
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* Copyright (c) 1998, 1999, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.awt.im; |
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import java.awt.AWTException; |
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import java.awt.im.spi.InputMethodDescriptor; |
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import java.util.Locale; |
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/** |
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* Provides complete information to make and handle the selection |
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* of an input method and a locale. Immutable class. |
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*/ |
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final class InputMethodLocator { |
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private InputMethodDescriptor descriptor; |
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// Currently `loader' is always the class loader for a |
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// descriptor. `loader' is provided for future extensions to be |
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// able to load input methods from somewhere else, and to support |
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// per input method name space. |
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private ClassLoader loader; |
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private Locale locale; |
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InputMethodLocator(InputMethodDescriptor descriptor, ClassLoader loader, Locale locale) { |
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if (descriptor == null) { |
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throw new NullPointerException("descriptor can't be null"); |
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} |
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this.descriptor = descriptor; |
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this.loader = loader; |
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this.locale = locale; |
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} |
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public boolean equals(Object other) { |
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if (other == this) { |
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return true; |
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} |
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if (other == null || this.getClass() != other.getClass()) { |
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return false; |
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} |
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InputMethodLocator otherLocator = (InputMethodLocator) other; |
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if (!descriptor.getClass().equals(otherLocator.descriptor.getClass())) { |
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return false; |
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} |
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if (loader == null && otherLocator.loader != null |
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|| loader != null && !loader.equals(otherLocator.loader)) { |
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return false; |
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} |
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if (locale == null && otherLocator.locale != null |
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|| locale != null && !locale.equals(otherLocator.locale)) { |
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return false; |
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} |
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return true; |
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} |
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public int hashCode() { |
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int result = descriptor.hashCode(); |
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if (loader != null) { |
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result |= loader.hashCode() << 10; |
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} |
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if (locale != null) { |
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result |= locale.hashCode() << 20; |
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} |
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return result; |
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} |
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InputMethodDescriptor getDescriptor() { |
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return descriptor; |
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} |
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ClassLoader getClassLoader() { |
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return loader; |
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} |
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Locale getLocale() { |
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return locale; |
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} |
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/** |
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* Returns whether support for locale is available from |
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* the input method. |
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*/ |
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boolean isLocaleAvailable(Locale locale) { |
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try { |
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Locale[] locales = descriptor.getAvailableLocales(); |
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for (int i = 0; i < locales.length; i++) { |
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if (locales[i].equals(locale)) { |
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return true; |
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} |
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} |
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} catch (AWTException e) { |
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// treat this as no locale available |
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} |
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return false; |
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} |
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/** |
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* Returns an input method locator that has locale forLocale, |
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* but otherwise the same data as this locator. Does not |
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* check whether the input method actually supports forLocale - |
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* use {@link #isLocaleAvailable} for that. |
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*/ |
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InputMethodLocator deriveLocator(Locale forLocale) { |
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if (forLocale == locale) { |
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return this; |
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} else { |
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return new InputMethodLocator(descriptor, loader, forLocale); |
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} |
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} |
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/** |
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* Returns whether this and other describe the same input method |
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* engine, ignoring the locale setting. |
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*/ |
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boolean sameInputMethod(InputMethodLocator other) { |
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if (other == this) { |
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return true; |
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} |
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if (other == null) { |
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return false; |
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} |
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if (!descriptor.getClass().equals(other.descriptor.getClass())) { |
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return false; |
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} |
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if (loader == null && other.loader != null |
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|| loader != null && !loader.equals(other.loader)) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Returns a string that can be used as an action command string. |
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* The first part of the string identifies the input method; it does |
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* not include '\n'. If getLocale is not null, getLocale().toString() |
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* is appended, separated by '\n'. |
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*/ |
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String getActionCommandString() { |
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String inputMethodString = descriptor.getClass().getName(); |
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if (locale == null) { |
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return inputMethodString; |
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} else { |
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return inputMethodString + "\n" + locale.toString(); |
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} |
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} |
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} |