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package org.eclipse.ecf.internal.irc.ui.hyperlink; |
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import java.util.StringTokenizer; |
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import org.eclipse.ecf.presence.ui.chatroom.ChatRoomManagerView; |
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import org.eclipse.jface.text.BadLocationException; |
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import org.eclipse.jface.text.IDocument; |
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import org.eclipse.jface.text.IRegion; |
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import org.eclipse.jface.text.ITextViewer; |
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import org.eclipse.jface.text.Region; |
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import org.eclipse.jface.text.hyperlink.IHyperlink; |
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import org.eclipse.ui.IViewPart; |
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public class ChannelHyperlinkDetector extends |
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org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector { |
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public static final String DEFAULT_PREFIX = "#"; //$NON-NLS-1$ |
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public static final String DEFAULT_ENDDELIMITERS = " \t\n\r\f<>"; //$NON-NLS-1$ |
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/* |
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* (non-Javadoc) |
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* |
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* @see org.eclipse.jface.text.hyperlink.IHyperlinkDetector#detectHyperlinks(org.eclipse.jface.text.ITextViewer, |
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* org.eclipse.jface.text.IRegion, boolean) |
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*/ |
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public IHyperlink[] detectHyperlinks(ITextViewer textViewer, |
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IRegion region, boolean canShowMultipleHyperlinks) { |
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if (region == null || textViewer == null) |
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return null; |
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ChatRoomManagerView view = (ChatRoomManagerView) getAdapter(IViewPart.class); |
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IDocument document = textViewer.getDocument(); |
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if (document == null) |
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return null; |
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int offset = region.getOffset(); |
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IRegion lineInfo; |
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String line; |
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try { |
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lineInfo = document.getLineInformationOfOffset(offset); |
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line = document.get(lineInfo.getOffset(), lineInfo.getLength()); |
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} catch (BadLocationException ex) { |
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return null; |
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} |
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Region detectedRegion = detectRegion(lineInfo, line, offset |
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- lineInfo.getOffset()); |
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if (detectedRegion == null) |
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return null; |
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int detectedOffset = detectedRegion.getOffset() - lineInfo.getOffset(); |
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return createHyperLinksForChannel(view, line.substring(detectedOffset, |
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detectedOffset + detectedRegion.getLength()), detectedRegion); |
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} |
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private Region detectRegion(IRegion lineInfo, String fromLine, |
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int offsetInLine) { |
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int resultLength = 0; |
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int separatorOffset = fromLine.indexOf(DEFAULT_PREFIX); |
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while (separatorOffset >= 0) { |
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StringTokenizer tokenizer = new StringTokenizer(fromLine |
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.substring(separatorOffset + DEFAULT_PREFIX.length()), |
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DEFAULT_ENDDELIMITERS, false); |
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if (!tokenizer.hasMoreTokens()) |
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return null; |
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resultLength = tokenizer.nextToken().length() |
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+ DEFAULT_PREFIX.length(); |
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if (offsetInLine >= separatorOffset |
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&& offsetInLine <= separatorOffset + resultLength) |
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break; |
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separatorOffset = fromLine.indexOf(DEFAULT_PREFIX, |
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separatorOffset + 1); |
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} |
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if (separatorOffset < 0) |
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return null; |
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return new Region(lineInfo.getOffset() + separatorOffset, resultLength); |
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} |
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private IHyperlink[] createHyperLinksForChannel(ChatRoomManagerView view, |
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String channel, Region region) { |
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return new IHyperlink[] { new ChannelHyperlink(view, channel, region) }; |
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} |
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} |