1 files changed, 81 insertions, 0 deletions
diff --git a/org.eclipse.mylyn.wikitext.creole.core/src/org/eclipse/mylyn/internal/wikitext/creole/core/token/LinkReplacementToken.java b/org.eclipse.mylyn.wikitext.creole.core/src/org/eclipse/mylyn/internal/wikitext/creole/core/token/LinkReplacementToken.java
new file mode 100644
index 000000000..336a9b6d6
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+++ b/org.eclipse.mylyn.wikitext.creole.core/src/org/eclipse/mylyn/internal/wikitext/creole/core/token/LinkReplacementToken.java
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Igor Malinin and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Igor Malinin - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.mylyn.internal.wikitext.creole.core.token;
+
+import java.util.regex.Pattern;
+
+import org.eclipse.mylyn.wikitext.core.parser.markup.PatternBasedElement;
+import org.eclipse.mylyn.wikitext.core.parser.markup.PatternBasedElementProcessor;
+import org.eclipse.mylyn.wikitext.creole.core.CreoleLanguage;
+
+/**
+ * Tokens that represent links, as follows: <code>[[link]]</code>
+ * 
+ * @author Igor Malinin
+ */
+public class LinkReplacementToken extends PatternBasedElement {
+
+	private static final Pattern replacementPattern = Pattern.compile("\\W"); //$NON-NLS-1$
+
+	@Override
+	protected String getPattern(int groupOffset) {
+		return "(~)?(\\[\\[([^\\]|]+)(?:[|]([^\\]]*))?\\]\\])"; //$NON-NLS-1$
+	}
+
+	@Override
+	protected int getPatternGroupCount() {
+		return 4;
+	}
+
+	@Override
+	protected PatternBasedElementProcessor newProcessor() {
+		return new LinkProcessor();
+	}
+
+	private static class LinkProcessor extends PatternBasedElementProcessor {
+		@Override
+		public void emit() {
+			String escaped = group(1);
+			if (escaped != null) {
+				String escapedText = group(2);
+				builder.characters(escapedText);
+			} else {
+				String link = group(3);
+				String text = group(4);
+				if (text == null || text.trim().length() == 0) {
+					text = link;
+				}
+				boolean looksLikeEmail = link.indexOf('@') != -1;
+				if (link.indexOf('/') != -1 || link.indexOf('#') != -1 || looksLikeEmail) {
+					if (looksLikeEmail) {
+						text = text.replaceFirst("\\s*mailto:", ""); //$NON-NLS-1$ //$NON-NLS-2$
+					}
+					// url link
+					builder.link(link, text);
+				} else {
+					// wiki link
+					String target = replacementPattern.matcher(link).replaceAll("_"); //$NON-NLS-1$
+					CreoleLanguage creoleLanguage = (CreoleLanguage) markupLanguage;
+					boolean exists = creoleLanguage.computeInternalLinkExists(target);
+
+					String internalHref = creoleLanguage.toInternalHref(target);
+					if (!exists) {
+						builder.characters(text);
+						builder.link(internalHref, "?"); //$NON-NLS-1$
+					} else {
+						builder.link(internalHref, text);
+					}
+				}
+			}
+		}
+	}
+
+}