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1
11 package org.eclipse.pde.internal.core.util;
12
13 import java.io.PrintWriter  ;
14 import java.util.Enumeration ;
15
16 import org.eclipse.jface.text.BadLocationException;
17 import org.eclipse.jface.text.IDocument;
18
19 public class PropertiesUtil {
20 private static final char[] HEX =
21 {
22 '0',
23 '1',
24 '2',
25 '3',
26 '4',
27 '5',
28 '6',
29 '7',
30 '8',
31 '9',
32 'A',
33 'B',
34 'C',
35 'D',
36 'E',
37 'F' };
38
39 public static String createWritableName(String source) {
40 if (source.indexOf(' ') >= 0) {
41 StringBuffer writableName = new StringBuffer ();
43 for (int i = 0; i < source.length(); i++) {
44 char c = source.charAt(i);
45 if (c == ' ') {
46 writableName.append("\\ "); } else
48 writableName.append(c);
49 }
50 source = writableName.toString();
51 }
52 return createEscapedValue(source);
53 }
54
55 public static String createEscapedValue(String value) {
56 StringBuffer buf = new StringBuffer (value.length() * 2);
58 for (int i = 0; i < value.length(); i++) {
60 char character = value.charAt(i);
61 if (character == '\\'
62 || character == '\t'
63 || character == '\r'
64 || character == '\n'
65 || character == '\f') {
66 buf.append('\\');
68 buf.append(character);
69 } else if ((character < 0x0020) || (character > 0x007e)) {
70 buf.append('\\');
72 buf.append('u');
73 buf.append(HEX[(character >> 12) & 0xF]); buf.append(HEX[(character >> 8) & 0xF]); buf.append(HEX[(character >> 4) & 0xF]); buf.append(HEX[character & 0xF]); } else {
78 buf.append(character);
80 }
81 }
82 return buf.toString();
83 }
84
85
88 public static String windEscapeChars(String s) {
89 if (s == null)
90 return null;
91
92 char aChar;
93 int len= s.length();
94 StringBuffer outBuffer= new StringBuffer (len);
95
96 for (int x= 0; x < len;) {
97 aChar= s.charAt(x++);
98 if (aChar == '\\') {
99 if (x >= len)
100 break;
101 aChar= s.charAt(x++);
102 if (aChar == 'u') {
103 int value= 0;
105 for (int i= 0; i < 4; i++) {
106 if (x >= len)
107 break;
108 aChar= s.charAt(x++);
109 switch (aChar) {
110 case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
111 value= (value << 4) + aChar - '0';
112 break;
113 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
114 value= (value << 4) + 10 + aChar - 'a';
115 break;
116 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
117 value= (value << 4) + 10 + aChar - 'A';
118 break;
119 default:
120 throw new IllegalArgumentException ("Malformed \\uxxxx encoding."); }
122 }
123 outBuffer.append((char) value);
124 } else {
125 if (aChar == 't') {
126 outBuffer.append('\t');
127 } else {
128 if (aChar == 'r') {
129 outBuffer.append('\r');
130 } else {
131 if (aChar == 'n') {
132 outBuffer.append('\n');
133 } else {
134 if (aChar == 'f') {
135 outBuffer.append('\f');
136 } else {
137 outBuffer.append(aChar);
138 }
139 }
140 }
141 }
142 }
143 } else
144 outBuffer.append(aChar);
145 }
146 return outBuffer.toString();
147 }
148 public static void writeKeyValuePair(String indent, String name, String value, PrintWriter writer) {
149 String writableName = createWritableName(name);
150 writer.print(writableName + " = ");
152 writer.println(PropertiesUtil.createEscapedValue(value));
153 }
154
155 public static void writeKeyValuePair(String indent, String name, Enumeration tokens, PrintWriter writer) {
156 String writableName = createWritableName(name);
157 writer.print(writableName + " = "); if (!tokens.hasMoreElements()) {
159 writer.println();
160 return;
161 }
162 int indentLength = name.length() + 3;
163 for (;tokens.hasMoreElements();) {
164 String token = tokens.nextElement().toString();
165 writer.print(PropertiesUtil.createEscapedValue(token));
166 if (tokens.hasMoreElements()) {
167 writer.println(",\\"); for (int j = 0; j < indentLength; j++) {
169 writer.print(" "); }
171 } else
172 writer.println(""); }
174 }
175
176 public static int getInsertOffset(IDocument doc) {
177 int offset = doc.getLength();
178 for (int i = doc.getNumberOfLines() - 1; i >= 0; i--) {
179 try {
180 if (doc.get(doc.getLineOffset(i), doc.getLineLength(i)).trim().length() > 0) {
181 break;
182 }
183 offset = doc.getLineOffset(i);
184 } catch (BadLocationException e) {
185 }
186 }
187 return offset;
188 }
189
190 public static boolean isNewlineNeeded(IDocument doc) throws BadLocationException {
191 int line = doc.getLineOfOffset(getInsertOffset(doc));
192 return doc.get(doc.getLineOffset(line), doc.getLineLength(line)).trim().length() > 0;
193 }
194
195 }
196 |
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