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
|
package org.eclipse.ecf.internal.irc.hyperlink;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.StringTokenizer;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.hyperlink.IHyperlink;
import org.eclipse.jface.text.hyperlink.URLHyperlinkDetector;
public class IRCHyperlinkDetector extends URLHyperlinkDetector {
public static final String IRC_PROTOCOL = "irc";
public IRCHyperlinkDetector() {
}
public IHyperlink[] detectHyperlinks(ITextViewer textViewer,
IRegion region, boolean canShowMultipleHyperlinks) {
if (region == null || textViewer == null)
return null;
IDocument document = textViewer.getDocument();
int offset = region.getOffset();
String urlString = null;
if (document == null)
return null;
IRegion lineInfo;
String line;
try {
lineInfo = document.getLineInformationOfOffset(offset);
line = document.get(lineInfo.getOffset(), lineInfo.getLength());
} catch (BadLocationException ex) {
return null;
}
int offsetInLine = offset - lineInfo.getOffset();
boolean startDoubleQuote = false;
int urlOffsetInLine = 0;
int urlLength = 0;
int urlSeparatorOffset = line.indexOf("://"); //$NON-NLS-1$
while (urlSeparatorOffset >= 0) {
// URL protocol (left to "://")
urlOffsetInLine = urlSeparatorOffset;
char ch;
do {
urlOffsetInLine--;
ch = ' ';
if (urlOffsetInLine > -1)
ch = line.charAt(urlOffsetInLine);
startDoubleQuote = ch == '"';
} while (Character.isUnicodeIdentifierStart(ch));
urlOffsetInLine++;
// Right to "://"
StringTokenizer tokenizer = new StringTokenizer(line
.substring(urlSeparatorOffset + 3), " \t\n\r\f<>", false); //$NON-NLS-1$
if (!tokenizer.hasMoreTokens())
return null;
urlLength = tokenizer.nextToken().length() + 3 + urlSeparatorOffset
- urlOffsetInLine;
if (offsetInLine >= urlOffsetInLine
&& offsetInLine <= urlOffsetInLine + urlLength)
break;
urlSeparatorOffset = line.indexOf("://", urlSeparatorOffset + 1); //$NON-NLS-1$
}
if (urlSeparatorOffset < 0)
return null;
if (startDoubleQuote) {
int endOffset = -1;
int nextDoubleQuote = line.indexOf('"', urlOffsetInLine);
int nextWhitespace = line.indexOf(' ', urlOffsetInLine);
if (nextDoubleQuote != -1 && nextWhitespace != -1)
endOffset = Math.min(nextDoubleQuote, nextWhitespace);
else if (nextDoubleQuote != -1)
endOffset = nextDoubleQuote;
else if (nextWhitespace != -1)
endOffset = nextWhitespace;
if (endOffset != -1)
urlLength = endOffset - urlOffsetInLine;
}
// Set and validate URL string
URI uri = null;
try {
urlString = line.substring(urlOffsetInLine, urlOffsetInLine
+ urlLength);
uri = new URI(urlString);
String protocol = uri.getScheme();
if (protocol == null || !protocol.equals(IRC_PROTOCOL))
return null;
} catch (URISyntaxException e) {
return null;
}
IRegion urlRegion = new Region(lineInfo.getOffset() + urlOffsetInLine,
urlLength);
return new IHyperlink[] { new IRCHyperlink(urlRegion, uri) };
}
}
|
