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1   /*
2    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3    *
4    * This code is free software; you can redistribute it and/or modify it
5    * under the terms of the GNU General Public License version 2 only, as
6    * published by the Free Software Foundation.  Oracle designates this
7    * particular file as subject to the "Classpath" exception as provided
8    * by Oracle in the LICENSE file that accompanied this code.
9    *
10   * This code is distributed in the hope that it will be useful, but WITHOUT
11   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13   * version 2 for more details (a copy is included in the LICENSE file that
14   * accompanied this code).
15   *
16   * You should have received a copy of the GNU General Public License version
17   * 2 along with this work; if not, write to the Free Software Foundation,
18   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19   *
20   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21   * or visit www.oracle.com if you need additional information or have any
22   * questions.
23   *
24   */
25  
26  /*
27   *
28   * (C) Copyright IBM Corp. 2003, All Rights Reserved
29   *
30   */
31  
32  package sun.font;
33  
34  import java.awt.font.LineMetrics;
35  import java.awt.font.GraphicAttribute;
36  
37  public final class CoreMetrics {
38  
39      public CoreMetrics(float ascent,
40                         float descent,
41                         float leading,
42                         float height,
43                         int baselineIndex,
44                         float[] baselineOffsets,
45                         float strikethroughOffset,
46                         float strikethroughThickness,
47                         float underlineOffset,
48                         float underlineThickness,
49                         float ssOffset,
50                         float italicAngle) {
51          this.ascent = ascent;
52          this.descent = descent;
53          this.leading = leading;
54          this.height = height;
55          this.baselineIndex = baselineIndex;
56          this.baselineOffsets = baselineOffsets;
57          this.strikethroughOffset = strikethroughOffset;
58          this.strikethroughThickness = strikethroughThickness;
59          this.underlineOffset = underlineOffset;
60          this.underlineThickness = underlineThickness;
61          this.ssOffset = ssOffset;
62          this.italicAngle = italicAngle;
63      }
64  
65      public static CoreMetrics get(LineMetrics lm) {
66          return ((FontLineMetrics)lm).cm;
67      }
68  
69      public final int hashCode() {
70          return Float.floatToIntBits(ascent + ssOffset);
71      }
72  
73      public final boolean equals(Object rhs) {
74          try {
75              return equals((CoreMetrics)rhs);
76          }
77          catch(ClassCastException e) {
78              return false;
79          }
80      }
81  
82      public final boolean equals(CoreMetrics rhs) {
83          if (rhs != null) {
84              if (this == rhs) {
85                  return true;
86              }
87  
88              return ascent == rhs.ascent
89                  && descent == rhs.descent
90                  && leading == rhs.leading
91                  && baselineIndex == rhs.baselineIndex
92                  && baselineOffsets[0] == rhs.baselineOffsets[0]
93                  && baselineOffsets[1] == rhs.baselineOffsets[1]
94                  && baselineOffsets[2] == rhs.baselineOffsets[2]
95                  && strikethroughOffset == rhs.strikethroughOffset
96                  && strikethroughThickness == rhs.strikethroughThickness
97                  && underlineOffset == rhs.underlineOffset
98                  && underlineThickness == rhs.underlineThickness
99                  && ssOffset == rhs.ssOffset
100                 && italicAngle == rhs.italicAngle;
101         }
102         return false;
103     }
104 
105     // fullOffsets is an array of 5 baseline offsets,
106     // roman, center, hanging, bottom, and top in that order
107     // this does NOT add the ssOffset
108     public final float effectiveBaselineOffset(float[] fullOffsets) {
109         switch (baselineIndex) {
110         case GraphicAttribute.TOP_ALIGNMENT:
111             return fullOffsets[4] + ascent;
112         case GraphicAttribute.BOTTOM_ALIGNMENT:
113             return fullOffsets[3] - descent;
114         default:
115             return fullOffsets[baselineIndex];
116         }
117     }
118 
119     public final float   ascent;
120     public final float   descent;
121     public final float   leading;
122     public final float   height;
123     public final int     baselineIndex;
124     public final float[] baselineOffsets; // !! this is a hole, don't expose this class
125     public final float   strikethroughOffset;
126     public final float   strikethroughThickness;
127     public final float   underlineOffset;
128     public final float   underlineThickness;
129     public final float   ssOffset;
130     public final float   italicAngle;
131 }