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51 package org.apache.fop.fo.pagination;
52
53 import org.apache.avalon.framework.logger.Logger;
55
56
61 public class PageNumberGenerator {
62
63 private String  format;
64 private char groupingSeparator;
65 private int groupingSize;
66 private int letterValue;
67
68 private final int DECIMAL = 1; private final int LOWERALPHA = 2; private final int UPPERALPHA = 3; private final int LOWERROMAN = 4; private final int UPPERROMAN = 5;
75 private int formatType = DECIMAL;
77 private int minPadding = 0;
79 private String zeros[] = {
81 "", "0", "00", "000", "0000", "00000"
82 };
83
84 private Logger log;
85
86 public PageNumberGenerator(String format, char groupingSeparator,
87 int groupingSize, int letterValue) {
88 this.format = format;
89 this.groupingSeparator = groupingSeparator;
90 this.groupingSize = groupingSize;
91 this.letterValue = letterValue;
92
93 int fmtLen = format.length();
96 if (fmtLen == 1) {
97 if (format.equals("1")) {
98 formatType = DECIMAL;
99 minPadding = 0;
100 } else if (format.equals("a")) {
101 formatType = LOWERALPHA;
102 } else if (format.equals("A")) {
103 formatType = UPPERALPHA;
104 } else if (format.equals("i")) {
105 formatType = LOWERROMAN;
106 } else if (format.equals("I")) {
107 formatType = UPPERROMAN;
108 } else {
109 formatType = DECIMAL;
112 minPadding = 0;
113 }
114 } else {
115 for (int i = 0; i < fmtLen - 1; i++) {
119 if (format.charAt(i) != '0') {
120 formatType = DECIMAL;
122 minPadding = 0;
123 } else {
124 minPadding = fmtLen - 1;
125 }
126 }
127 }
128 }
129
130 public void setLogger(Logger logger) {
131 log = logger;
132 }
133
134 public String makeFormattedPageNumber(int number) {
135 String pn = null;
136 if (formatType == DECIMAL) {
137 pn = Integer.toString(number);
138 if (minPadding >= pn.length()) {
139 int nz = minPadding - pn.length() + 1;
140 pn = zeros[nz] + pn;
141 }
142 } else if ((formatType == LOWERROMAN) || (formatType == UPPERROMAN)) {
143 pn = makeRoman(number);
144 if (formatType == UPPERROMAN)
145 pn = pn.toUpperCase();
146 } else {
147 pn = makeAlpha(number);
149 if (formatType == UPPERALPHA)
150 pn = pn.toUpperCase();
151 }
152 return pn;
153 }
154
155 private String makeRoman(int num) {
156 int arabic[] = {
157 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1
158 };
159 String roman[] = {
160 "m", "cm", "d", "cd", "c", "xc", "l", "xl", "x", "ix", "v", "iv",
161 "i"
162 };
163
164 int i = 0;
165 StringBuffer romanNumber = new StringBuffer ();
166
167 while (num > 0) {
168 while (num >= arabic[i]) {
169 num = num - arabic[i];
170 romanNumber.append(roman[i]);
171 }
172 i = i + 1;
173 }
174 return romanNumber.toString();
175 }
176
177 private String makeAlpha(int num) {
178 String letters = "abcdefghijklmnopqrstuvwxyz";
179 StringBuffer alphaNumber = new StringBuffer ();
180
181 int base = 26;
182 int rem = 0;
183
184 num--;
185 if (num < base) {
186 alphaNumber.append(letters.charAt(num));
187 } else {
188 while (num >= base) {
189 rem = num % base;
190 alphaNumber.append(letters.charAt(rem));
191 num = num / base;
192 }
193 alphaNumber.append(letters.charAt(num - 1));
194 }
195 return alphaNumber.reverse().toString();
196 }
197
198 }
199
200 |
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