1 files changed, 56 insertions, 0 deletions
diff --git a/autotools/org.eclipse.linuxtools.cdt.autotools.ui/src/org/eclipse/linuxtools/cdt/autotools/ui/editors/AutoconfIdentifierRule.java b/autotools/org.eclipse.linuxtools.cdt.autotools.ui/src/org/eclipse/linuxtools/cdt/autotools/ui/editors/AutoconfIdentifierRule.java
new file mode 100644
index 0000000000..4306541d85
--- /dev/null
+++ b/autotools/org.eclipse.linuxtools.cdt.autotools.ui/src/org/eclipse/linuxtools/cdt/autotools/ui/editors/AutoconfIdentifierRule.java
@@ -0,0 +1,56 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 20009 Red Hat, Inc.
+ * 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:
+ *     Red Hat Incorporated - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.linuxtools.cdt.autotools.ui.editors;
+
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.text.rules.ICharacterScanner;
+import org.eclipse.jface.text.rules.IPredicateRule;
+import org.eclipse.jface.text.rules.IToken;
+import org.eclipse.jface.text.rules.Token;
+
+public class AutoconfIdentifierRule implements IPredicateRule {
+
+	private IToken fToken;
+	private String fExtraChars = "_${@"; //$NON-NLS-1$
+	
+	public AutoconfIdentifierRule(IToken token) {
+		Assert.isNotNull(token);
+		fToken = token;
+	}
+
+	public IToken getSuccessToken() {
+		return fToken;
+	}
+
+	/*
+	 * @see IRule#evaluate(ICharacterScanner)
+	 */
+	public IToken evaluate(ICharacterScanner scanner) {
+		return evaluate(scanner, false);
+	}
+	
+	/*
+	 * @see IPredicateRule#evaluate(ICharacterScanner, resume)
+	 */
+	public IToken evaluate(ICharacterScanner scanner, boolean resume) {
+		int c = scanner.read();
+		if (Character.isLetterOrDigit((char)c) || fExtraChars.indexOf((char)c) >= 0) {
+			do {
+				c = scanner.read();
+			} while (Character.isLetterOrDigit((char)c) || fExtraChars.indexOf((char)c) >= 0);
+			scanner.unread();
+			return fToken;
+		}
+		scanner.unread();
+		return Token.UNDEFINED;
+	}
+
+}