1 files changed, 50 insertions, 0 deletions
diff --git a/org.eclipse.jface.text/src/org/eclipse/jface/text/rules/WhitespaceRule.java b/org.eclipse.jface.text/src/org/eclipse/jface/text/rules/WhitespaceRule.java
new file mode 100644
index 00000000000..c4c47050233
--- /dev/null
+++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/rules/WhitespaceRule.java
@@ -0,0 +1,50 @@
+package org.eclipse.jface.text.rules;
+
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+
+import org.eclipse.jface.util.Assert;
+
+/**
+ * An implementation of <code>IRule</code> capable of detecting whitespace.
+ * A whitespace rule uses a whitespace detector in order to find out which
+ * characters are whitespace characters.
+ *
+ * @see IWhitespaceDetector
+ */
+public class WhitespaceRule implements IRule {
+
+	/** The whitespace detector used by this rule */
+	protected IWhitespaceDetector fDetector;
+
+	/**
+	 * Creates a rule which, with the help of an
+	 * whitespace detector, will return a whitespace
+	 * token when a whitespace is detected.
+	 *
+	 * @param detector the rule's whitespace detector, may not be <code>null</code>
+	 */
+	public WhitespaceRule(IWhitespaceDetector detector) {
+		Assert.isNotNull(detector);
+		fDetector= detector;
+	}
+
+	/*
+	 * @see IRule#evaluate
+	 */
+	public IToken evaluate(ICharacterScanner scanner) {
+		int c= scanner.read();
+		if (fDetector.isWhitespace((char) c)) {
+			do {
+				c= scanner.read();
+			} while (fDetector.isWhitespace((char) c));
+			scanner.unread();
+			return Token.WHITESPACE;
+		} else {
+			scanner.unread();
+			return Token.UNDEFINED;
+		}
+	}
+}
+\ No newline at end of file