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src/java.desktop/share/classes/javax/swing/text/html/MuxingAttributeSet.java

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  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 javax.swing.text.html;
  26 
  27 import javax.swing.text.*;
  28 import java.io.Serializable;
  29 import java.util.*;
  30 
  31 /**
  32  * An implementation of <code>AttributeSet</code> that can multiplex
  33  * across a set of <code>AttributeSet</code>s.
  34  *
  35  */
  36 @SuppressWarnings("serial") // Same-version serialization only
  37 class MuxingAttributeSet implements AttributeSet, Serializable {
  38     /**
  39      * Creates a <code>MuxingAttributeSet</code> with the passed in
  40      * attributes.
  41      */
  42     public MuxingAttributeSet(AttributeSet[] attrs) {
  43         this.attrs = attrs;
  44     }
  45 
  46     /**
  47      * Creates an empty <code>MuxingAttributeSet</code>. This is intended for
  48      * use by subclasses only, and it is also intended that subclasses will
  49      * set the constituent <code>AttributeSet</code>s before invoking any
  50      * of the <code>AttributeSet</code> methods.
  51      */
  52     protected MuxingAttributeSet() {
  53     }
  54 
  55     /**
  56      * Directly sets the <code>AttributeSet</code>s that comprise this
  57      * <code>MuxingAttributeSet</code>.
  58      */
  59     protected synchronized void setAttributes(AttributeSet[] attrs) {
  60         this.attrs = attrs;
  61     }
  62 
  63     /**
  64      * Returns the <code>AttributeSet</code>s multiplexing too. When the
  65      * <code>AttributeSet</code>s need to be referenced, this should be called.
  66      */
  67     protected synchronized AttributeSet[] getAttributes() {
  68         return attrs;
  69     }
  70 
  71     /**
  72      * Inserts <code>as</code> at <code>index</code>. This assumes
  73      * the value of <code>index</code> is between 0 and attrs.length,
  74      * inclusive.
  75      */
  76     protected synchronized void insertAttributeSetAt(AttributeSet as,
  77                                                      int index) {
  78         int numAttrs = attrs.length;
  79         AttributeSet newAttrs[] = new AttributeSet[numAttrs + 1];
  80         if (index < numAttrs) {
  81             if (index > 0) {
  82                 System.arraycopy(attrs, 0, newAttrs, 0, index);
  83                 System.arraycopy(attrs, index, newAttrs, index + 1,
  84                                  numAttrs - index);
  85             }
  86             else {
  87                 System.arraycopy(attrs, 0, newAttrs, 1, numAttrs);
  88             }
  89         }
  90         else {
  91             System.arraycopy(attrs, 0, newAttrs, 0, numAttrs);
  92         }
  93         newAttrs[index] = as;
  94         attrs = newAttrs;
  95     }
  96 
  97     /**
  98      * Removes the AttributeSet at <code>index</code>. This assumes
  99      * the value of <code>index</code> is greater than or equal to 0,
 100      * and less than attrs.length.
 101      */
 102     protected synchronized void removeAttributeSetAt(int index) {
 103         int numAttrs = attrs.length;
 104         AttributeSet[] newAttrs = new AttributeSet[numAttrs - 1];
 105         if (numAttrs > 0) {
 106             if (index == 0) {
 107                 // FIRST
 108                 System.arraycopy(attrs, 1, newAttrs, 0, numAttrs - 1);
 109             }
 110             else if (index < (numAttrs - 1)) {
 111                 // MIDDLE
 112                 System.arraycopy(attrs, 0, newAttrs, 0, index);
 113                 System.arraycopy(attrs, index + 1, newAttrs, index,
 114                                  numAttrs - index - 1);
 115             }
 116             else {
 117                 // END
 118                 System.arraycopy(attrs, 0, newAttrs, 0, numAttrs - 1);
 119             }


 241         boolean result = true;
 242 
 243         Enumeration<?> names = attrs.getAttributeNames();
 244         while (result && names.hasMoreElements()) {
 245             Object name = names.nextElement();
 246             result = attrs.getAttribute(name).equals(getAttribute(name));
 247         }
 248 
 249         return result;
 250     }
 251 
 252     /**
 253      * Returns null, subclasses may wish to do something more
 254      * intelligent with this.
 255      */
 256     public AttributeSet getResolveParent() {
 257         return null;
 258     }
 259 
 260     /**
 261      * The <code>AttributeSet</code>s that make up the resulting
 262      * <code>AttributeSet</code>.
 263      */
 264     private AttributeSet[] attrs;
 265 
 266 
 267     /**
 268      * An Enumeration of the Attribute names in a MuxingAttributeSet.
 269      * This may return the same name more than once.
 270      */
 271     private class MuxingAttributeNameEnumeration implements Enumeration<Object> {
 272 
 273         MuxingAttributeNameEnumeration() {
 274             updateEnum();
 275         }
 276 
 277         public boolean hasMoreElements() {
 278             if (currentEnum == null) {
 279                 return false;
 280             }
 281             return currentEnum.hasMoreElements();
 282         }




  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 javax.swing.text.html;
  26 
  27 import javax.swing.text.*;
  28 import java.io.Serializable;
  29 import java.util.*;
  30 
  31 /**
  32  * An implementation of {@code AttributeSet} that can multiplex
  33  * across a set of {@code AttributeSet}s.
  34  *
  35  */
  36 @SuppressWarnings("serial") // Same-version serialization only
  37 class MuxingAttributeSet implements AttributeSet, Serializable {
  38     /**
  39      * Creates a {@code MuxingAttributeSet} with the passed in
  40      * attributes.
  41      */
  42     public MuxingAttributeSet(AttributeSet[] attrs) {
  43         this.attrs = attrs;
  44     }
  45 
  46     /**
  47      * Creates an empty {@code MuxingAttributeSet}. This is intended for
  48      * use by subclasses only, and it is also intended that subclasses will
  49      * set the constituent {@code AttributeSet}s before invoking any
  50      * of the {@code AttributeSet} methods.
  51      */
  52     protected MuxingAttributeSet() {
  53     }
  54 
  55     /**
  56      * Directly sets the {@code AttributeSet}s that comprise this
  57      * {@code MuxingAttributeSet}.
  58      */
  59     protected synchronized void setAttributes(AttributeSet[] attrs) {
  60         this.attrs = attrs;
  61     }
  62 
  63     /**
  64      * Returns the {@code AttributeSet}s multiplexing too. When the
  65      * {@code AttributeSet}s need to be referenced, this should be called.
  66      */
  67     protected synchronized AttributeSet[] getAttributes() {
  68         return attrs;
  69     }
  70 
  71     /**
  72      * Inserts {@code as} at {@code index}. This assumes
  73      * the value of {@code index} is between 0 and attrs.length,
  74      * inclusive.
  75      */
  76     protected synchronized void insertAttributeSetAt(AttributeSet as,
  77                                                      int index) {
  78         int numAttrs = attrs.length;
  79         AttributeSet newAttrs[] = new AttributeSet[numAttrs + 1];
  80         if (index < numAttrs) {
  81             if (index > 0) {
  82                 System.arraycopy(attrs, 0, newAttrs, 0, index);
  83                 System.arraycopy(attrs, index, newAttrs, index + 1,
  84                                  numAttrs - index);
  85             }
  86             else {
  87                 System.arraycopy(attrs, 0, newAttrs, 1, numAttrs);
  88             }
  89         }
  90         else {
  91             System.arraycopy(attrs, 0, newAttrs, 0, numAttrs);
  92         }
  93         newAttrs[index] = as;
  94         attrs = newAttrs;
  95     }
  96 
  97     /**
  98      * Removes the AttributeSet at {@code index}. This assumes
  99      * the value of {@code index} is greater than or equal to 0,
 100      * and less than attrs.length.
 101      */
 102     protected synchronized void removeAttributeSetAt(int index) {
 103         int numAttrs = attrs.length;
 104         AttributeSet[] newAttrs = new AttributeSet[numAttrs - 1];
 105         if (numAttrs > 0) {
 106             if (index == 0) {
 107                 // FIRST
 108                 System.arraycopy(attrs, 1, newAttrs, 0, numAttrs - 1);
 109             }
 110             else if (index < (numAttrs - 1)) {
 111                 // MIDDLE
 112                 System.arraycopy(attrs, 0, newAttrs, 0, index);
 113                 System.arraycopy(attrs, index + 1, newAttrs, index,
 114                                  numAttrs - index - 1);
 115             }
 116             else {
 117                 // END
 118                 System.arraycopy(attrs, 0, newAttrs, 0, numAttrs - 1);
 119             }


 241         boolean result = true;
 242 
 243         Enumeration<?> names = attrs.getAttributeNames();
 244         while (result && names.hasMoreElements()) {
 245             Object name = names.nextElement();
 246             result = attrs.getAttribute(name).equals(getAttribute(name));
 247         }
 248 
 249         return result;
 250     }
 251 
 252     /**
 253      * Returns null, subclasses may wish to do something more
 254      * intelligent with this.
 255      */
 256     public AttributeSet getResolveParent() {
 257         return null;
 258     }
 259 
 260     /**
 261      * The {@code AttributeSet}s that make up the resulting
 262      * {@code AttributeSet}.
 263      */
 264     private AttributeSet[] attrs;
 265 
 266 
 267     /**
 268      * An Enumeration of the Attribute names in a MuxingAttributeSet.
 269      * This may return the same name more than once.
 270      */
 271     private class MuxingAttributeNameEnumeration implements Enumeration<Object> {
 272 
 273         MuxingAttributeNameEnumeration() {
 274             updateEnum();
 275         }
 276 
 277         public boolean hasMoreElements() {
 278             if (currentEnum == null) {
 279                 return false;
 280             }
 281             return currentEnum.hasMoreElements();
 282         }


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