1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.hssf.usermodel;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
/**
* Stores width and height details about a font.
*/
public class FontDetails
{
private String _fontName;
private int _height;
private final Map<Character, Integer> charWidths = new HashMap<>();
/**
* Construct the font details with the given name and height.
*
* @param fontName The font name.
* @param height The height of the font.
*/
public FontDetails( String fontName, int height )
{
_fontName = fontName;
_height = height;
}
public String getFontName()
{
return _fontName;
}
public int getHeight()
{
return _height;
}
public void addChar( char c, int width )
{
charWidths.put(Character.valueOf(c), Integer.valueOf(width));
}
/**
* Retrieves the width of the specified character. If the metrics for
* a particular character are not available it defaults to returning the
* width for the 'W' character.
*/
public int getCharWidth( char c )
{
Integer widthInteger = charWidths.get(Character.valueOf(c));
if (widthInteger == null) {
return 'W' == c ? 0 : getCharWidth('W');
}
return widthInteger;
}
public void addChars( char[] characters, int[] widths )
{
for ( int i = 0; i < characters.length; i++ )
{
charWidths.put( Character.valueOf(characters[i]), Integer.valueOf(widths[i]));
}
}
protected static String buildFontHeightProperty(String fontName) {
return "font." + fontName + ".height";
}
protected static String buildFontWidthsProperty(String fontName) {
return "font." + fontName + ".widths";
}
protected static String buildFontCharactersProperty(String fontName) {
return "font." + fontName + ".characters";
}
/**
* Create an instance of <code>FontDetails</code> by loading them from the
* provided property object.
* @param fontName the font name
* @param fontMetricsProps the property object holding the details of this
* particular font.
* @return a new FontDetails instance.
*/
public static FontDetails create( String fontName, Properties fontMetricsProps )
{
String heightStr = fontMetricsProps.getProperty( buildFontHeightProperty(fontName) );
String widthsStr = fontMetricsProps.getProperty( buildFontWidthsProperty(fontName) );
String charactersStr = fontMetricsProps.getProperty( buildFontCharactersProperty(fontName) );
// Ensure that this is a font we know about
if(heightStr == null || widthsStr == null || charactersStr == null) {
// We don't know all we need to about this font
// Since we don't know its sizes, we can't work with it
throw new IllegalArgumentException("The supplied FontMetrics doesn't know about the font '" + fontName + "', so we can't use it. Please add it to your font metrics file (see StaticFontMetrics.getFontDetails");
}
int height = Integer.parseInt(heightStr);
FontDetails d = new FontDetails(fontName, height);
String[] charactersStrArray = split(charactersStr, ",", -1);
String[] widthsStrArray = split(widthsStr, ",", -1);
if (charactersStrArray.length != widthsStrArray.length)
throw new RuntimeException("Number of characters does not number of widths for font " + fontName);
for ( int i = 0; i < widthsStrArray.length; i++ )
{
if (charactersStrArray[i].length() != 0)
d.addChar(charactersStrArray[i].charAt(0), Integer.parseInt(widthsStrArray[i]));
}
return d;
}
/**
* Gets the width of all characters in a string.
*
* @param str The string to measure.
* @return The width of the string for a 10 point font.
*/
public int getStringWidth(String str)
{
int width = 0;
for (int i = 0; i < str.length(); i++)
{
width += getCharWidth(str.charAt(i));
}
return width;
}
/**
* Split the given string into an array of strings using the given
* delimiter.
*/
private static String[] split(String text, String separator, int max)
{
StringTokenizer tok = new StringTokenizer(text, separator);
int listSize = tok.countTokens();
if(max != -1 && listSize > max)
listSize = max;
String list[] = new String[listSize];
for(int i = 0; tok.hasMoreTokens(); i++)
{
if(max != -1 && i == listSize - 1)
{
StringBuffer buf = new StringBuffer((text.length() * (listSize - i)) / listSize);
while(tok.hasMoreTokens())
{
buf.append(tok.nextToken());
if(tok.hasMoreTokens())
buf.append(separator);
}
list[i] = buf.toString().trim();
break;
}
list[i] = tok.nextToken().trim();
}
return list;
}
}
|
