1 /*

     2  * Copyright (c) 2003, 2014, 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 javax.swing.plaf.synth;

    26 

    27 import javax.swing.*;

    28 import javax.swing.plaf.FontUIResource;

    29 import java.awt.Font;

    30 import java.util.*;

    31 import java.util.regex.*;

    32 import sun.swing.plaf.synth.*;

    33 import sun.swing.BakedArrayList;

    34 

    35 /**

    36  * Factory used for obtaining styles. Supports associating a style based on

    37  * the name of the component as returned by <code>Component.getName()</code>,

    38  * and the <code>Region</code> associated with the <code>JComponent</code>.

    39  * Lookup is done using regular expressions.

    40  *

    41  * @author Scott Violet

    42  */

    43 class DefaultSynthStyleFactory extends SynthStyleFactory {

    44     /**

    45      * Used to indicate the lookup should be done based on Component name.

    46      */

    47     public static final int NAME = 0;

    48     /**

    49      * Used to indicate the lookup should be done based on region.

    50      */

    51     public static final int REGION = 1;

    52 

    53     /**

    54      * List containing set of StyleAssociations used in determining matching

    55      * styles.

    56      */

    57     private List<StyleAssociation> _styles;

    58     /**

    59      * Used during lookup.

    60      */

    61     private BakedArrayList<SynthStyle> _tmpList;

    62 

    63     /**

    64      * Maps from a List (BakedArrayList to be precise) to the merged style.

    65      */

    66     private Map<BakedArrayList<SynthStyle>, SynthStyle> _resolvedStyles;

    67 

    68     /**

    69      * Used if there are no styles matching a widget.

    70      */

    71     private SynthStyle _defaultStyle;

    72 

    73 

    74     DefaultSynthStyleFactory() {

    75         _tmpList = new BakedArrayList<SynthStyle>(5);

    76         _styles = new ArrayList<>();

    77         _resolvedStyles = new HashMap<>();

    78     }

    79 

    80     public synchronized void addStyle(DefaultSynthStyle style,

    81                          String path, int type) throws PatternSyntaxException {

    82         if (path == null) {

    83             // Make an empty path match all.

    84             path = ".*";

    85         }

    86         if (type == NAME) {

    87             _styles.add(StyleAssociation.createStyleAssociation(

    88                             path, style, type));

    89         }

    90         else if (type == REGION) {

    91             _styles.add(StyleAssociation.createStyleAssociation(

    92                             path.toLowerCase(), style, type));

    93         }

    94     }

    95 

    96     /**

    97      * Returns the style for the specified Component.

    98      *

    99      * @param c Component asking for

   100      * @param id ID of the Component

   101      */

   102     public synchronized SynthStyle getStyle(JComponent c, Region id) {

   103         BakedArrayList<SynthStyle> matches = _tmpList;

   104 

   105         matches.clear();

   106         getMatchingStyles(matches, c, id);

   107 

   108         if (matches.size() == 0) {

   109             return getDefaultStyle();

   110         }

   111         // Use a cached Style if possible, otherwise create a new one.

   112         matches.cacheHashCode();

   113         SynthStyle style = getCachedStyle(matches);

   114 

   115         if (style == null) {

   116             style = mergeStyles(matches);

   117 

   118             if (style != null) {

   119                 cacheStyle(matches, style);

   120             }

   121         }

   122         return style;

   123     }

   124 

   125     /**

   126      * Returns the style to use if there are no matching styles.

   127      */

   128     private SynthStyle getDefaultStyle() {

   129         if (_defaultStyle == null) {

   130             _defaultStyle = new DefaultSynthStyle();

   131             ((DefaultSynthStyle)_defaultStyle).setFont(

   132                 new FontUIResource(Font.DIALOG, Font.PLAIN,12));

   133         }

   134         return _defaultStyle;

   135     }

   136 

   137     /**

   138      * Fetches any styles that match the passed into arguments into

   139      * <code>matches</code>.

   140      */

   141     private void getMatchingStyles(List<SynthStyle> matches, JComponent c,

   142                                    Region id) {

   143         String idName = id.getLowerCaseName();

   144         String cName = c.getName();

   145 

   146         if (cName == null) {

   147             cName = "";

   148         }

   149         for (int counter = _styles.size() - 1; counter >= 0; counter--){

   150             StyleAssociation sa = _styles.get(counter);

   151             String path;

   152 

   153             if (sa.getID() == NAME) {

   154                 path = cName;

   155             }

   156             else {

   157                 path = idName;

   158             }

   159 

   160             if (sa.matches(path) && matches.indexOf(sa.getStyle()) == -1) {

   161                 matches.add(sa.getStyle());

   162             }

   163         }

   164     }

   165 

   166     /**

   167      * Caches the specified style.

   168      */

   169     private void cacheStyle(List<SynthStyle> styles, SynthStyle style) {

   170         BakedArrayList<SynthStyle> cachedStyles = new BakedArrayList<>(styles);

   171 

   172         _resolvedStyles.put(cachedStyles, style);

   173     }

   174 

   175     /**

   176      * Returns the cached style from the passed in arguments.

   177      */

   178     private SynthStyle getCachedStyle(List<SynthStyle> styles) { // ??

   179         if (styles.size() == 0) {

   180             return null;

   181         }

   182         return _resolvedStyles.get(styles);

   183     }

   184 

   185     /**

   186      * Creates a single Style from the passed in styles. The passed in List

   187      * is reverse sorted, that is the most recently added style found to

   188      * match will be first.

   189      */

   190     private SynthStyle mergeStyles(List<SynthStyle> styles) {

   191         int size = styles.size();

   192 

   193         if (size == 0) {

   194             return null;

   195         }

   196         else if (size == 1) {

   197             return (SynthStyle)((DefaultSynthStyle)styles.get(0)).clone();

   198         }

   199         // NOTE: merging is done backwards as DefaultSynthStyleFactory reverses

   200         // order, that is, the most specific style is first.

   201         DefaultSynthStyle style = (DefaultSynthStyle)styles.get(size - 1);

   202 

   203         style = (DefaultSynthStyle)style.clone();

   204         for (int counter = size - 2; counter >= 0; counter--) {

   205             style = ((DefaultSynthStyle)styles.get(counter)).addTo(style);

   206         }

   207         return style;

   208     }

   209 }