1 package org.apache.maven.doxia.module.rtf;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 /**
23 * A basic font descriptor using standard PostScript font metrics to compute
24 * text extents. All dimensions returned are in twips.
25 */
26 class Font
27 {
28 private int size;
29
30 private FontMetrics metrics;
31
32 Font( int style, int size /*pts*/ )
33 throws Exception
34 {
35 this.size = size;
36 metrics = FontMetrics.find( style );
37 }
38
39 int ascent()
40 {
41 return toTwips( metrics.ascent );
42 }
43
44 int descent()
45 {
46 return toTwips( metrics.descent );
47 }
48
49 TextExtents textExtents( String text )
50 {
51 int i, n;
52 int width = 0;
53 int ascent = 0;
54 int descent = 0;
55
56 for ( i = 0, n = text.length(); i < n; ++i )
57 {
58 char c = text.charAt( i );
59 if ( c > 255 )
60 {
61 c = ' ';
62 }
63 FontMetrics.CharMetrics charMetrics = this.metrics.charMetrics[c];
64 width += charMetrics.wx;
65 if ( charMetrics.ury > ascent )
66 {
67 ascent = charMetrics.ury;
68 }
69 if ( charMetrics.lly < descent )
70 {
71 descent = charMetrics.lly;
72 }
73 }
74
75 int height = ascent + Math.abs( descent );
76
77 return new TextExtents( toTwips( width ), toTwips( height ), toTwips( ascent ) );
78 }
79
80 private int toTwips( int length )
81 {
82 return (int) Math.rint( (double) length * size / 50. );
83 }
84
85 static class TextExtents
86 {
87
88 int width;
89
90 int height;
91
92 int ascent;
93
94 TextExtents( int width, int height, int ascent )
95 {
96 this.width = width;
97 this.height = height;
98 this.ascent = ascent;
99 }
100
101 }
102 }