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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [javax/] [swing/] [text/] [AttributeSet.java] - Blame information for rev 772

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1 772 jeremybenn 
/* AttributeSet.java --
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   Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing.text;
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import java.util.Enumeration;
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/**
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 * A set of attributes. An attribute has a key and a value. They typically
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 * describe features of a piece of text that make up its graphical
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 * representation.
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 *
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 * An <code>AttributeSet</code> may have a resolving parent,
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 * that is another <code>AttributeSet</code> that is searched for attribute
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 * keys that are not stored locally in this <code>AttributeSet</code>.
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 *
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 * @author original author unknown
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 * @author Roman Kennke (roman@kennke.org)
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 */
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public interface AttributeSet
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{
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  /**
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   * Used as keys to identify character-run attributes.
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   */
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  static interface CharacterAttribute
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  {
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    // This interface is a marker interface and has no methods.
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  }
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  /**
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   * Used as keys to identify color attributes.
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   */
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  static interface ColorAttribute
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  {
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    // This interface is a marker interface and has no methods.
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  }
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  /**
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   * Used as keys to identify font attributes.
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   */
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  static interface FontAttribute
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  {
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    // This interface is a marker interface and has no methods.
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  }
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  /**
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   * Used as keys to identify paragraph level attributes.
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   */
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  static interface ParagraphAttribute
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  {
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    // This interface is a marker interface and has no methods.
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  }
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  /**
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   * Key of the attribute that is used to describe the name of an
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   * <code>AttributeSet</code>.
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   */
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  Object NameAttribute = StyleConstants.NameAttribute;
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  /**
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   * Key of the attribute that is used to identify the resolving parent of
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   * an <code>AttributeSet</code>.
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   */
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  Object ResolveAttribute = StyleConstants.ResolveAttribute;
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  /**
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   * Returns <code>true</code> if this <code>AttributeSet</code> contains
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   * an attribute with the specified <code>name</code> and <code>value</code>,
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   * <code>false</code> otherwise.
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   *
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   * @param name the name of the requested attribute
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   * @param value the value of the requested attribute
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   *
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   * @return <code>true</code> if this <code>AttributeSet</code> contains
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   *         an attribute with the specified <code>name</code> and
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   *         <code>value</code>, <code>false</code> otherwise
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   */
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  boolean containsAttribute(Object name, Object value);
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  /**
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   * Returns <code>true</code> of this <code>AttributeSet</code> contains all
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   * of the specified <code>attributes</code>.
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   *
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   * @param attributes the requested attributes
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   *
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   * @return <code>true</code> of this <code>AttributeSet</code> contains all
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   *         of the specified <code>attributes</code>
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   */
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  boolean containsAttributes(AttributeSet attributes);
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  /**
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   * Creates and returns a copy of this <code>AttributeSet</code>.
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   *
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   * @return a copy of this <code>AttributeSet</code>
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   */
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  AttributeSet copyAttributes();
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  /**
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   * Returns the attribute with the specified <code>key</code> or
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   * <code>null</code> if no such attribute is defined in this
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   * <code>AttributeSet</code> and its resolving parents.
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   *
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   * @param key the key of the attribute that is looked up
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   *
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   * @return the attribute with the specified <code>key</code> or
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   *         <code>null</code> if no such attribute is defined in this
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   *         <code>AttributeSet</code> and its resolving parents
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   */
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  Object getAttribute(Object key);
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  /**
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   * Returns the number of attributes that are stored locally in this
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   * <code>AttributeSet</code>.
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   *
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   * @return the number of attributes that are stored locally in this
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   * <code>AttributeSet</code>
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   */
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  int getAttributeCount();
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  /**
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   * Returns the names of the attributes that are stored in this
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   * <code>AttributeSet</code>.
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   *
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   * @return the names of the attributes that are stored in this
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   *         <code>AttributeSet</code>
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   */
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  Enumeration<?> getAttributeNames();
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  /**
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   * Returns the resolving parent of this <code>AttributeSet</code>.
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   * If a key is not stored locally, then a {@link #getAttribute(Object)}
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   * request is resolved up in the resolving parent of this
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   * <code>AttributeSet</code>.
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   *
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   * @return the resolving parent of this <code>AttributeSet</code>
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   */
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  AttributeSet getResolveParent();
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  /**
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   * Returns <code>true</code> if an attribute with the specified name is
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   * defined locally in this <code>AttributeSet</code>, without resolving
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   * through the resolving parents.
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   *
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   * @return <code>true</code> if an attribute with the specified name is
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   *          defined locally in this <code>AttributeSet</code>
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   */
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  boolean isDefined(Object attrName);
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  /**
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   * Returns <code>true</code> if all of the attributes in <code>attr</code>
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   * are equal to the attributes in this <code>AttributeSet</code>,
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   * <code>false</code> otherwise.
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   *
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   * @param attr the attributes to be compared to <code>this</code>
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   *
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   * @return <code>true</code> if all of the attributes in <code>attr</code>
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   *         are equal to the attributes in this <code>AttributeSet</code>,
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   *         <code>false</code> otherwise
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   */
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  boolean isEqual(AttributeSet attr);
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}

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