1 files changed, 62 insertions, 0 deletions
diff --git a/plugins/org.eclipse.dltk.sh.ui/src/org/eclipse/dltk/sh/ui/text/EvalScanner.java b/plugins/org.eclipse.dltk.sh.ui/src/org/eclipse/dltk/sh/ui/text/EvalScanner.java
new file mode 100644
index 0000000..53b28e5
--- /dev/null
+++ b/plugins/org.eclipse.dltk.sh.ui/src/org/eclipse/dltk/sh/ui/text/EvalScanner.java
@@ -0,0 +1,62 @@
+/*******************************************************************************
+ * Copyright (c) 2010 Mat Booth 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
+ *******************************************************************************/
+package org.eclipse.dltk.sh.ui.text;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.dltk.sh.ui.IShellColorConstants;
+import org.eclipse.dltk.ui.text.AbstractScriptScanner;
+import org.eclipse.dltk.ui.text.IColorManager;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.text.rules.IRule;
+import org.eclipse.jface.text.rules.IToken;
+import org.eclipse.jface.text.rules.WhitespaceRule;
+
+/**
+ * Scans command substitution document partitions. I.e., the sections between
+ * back-ticks or enclosed in $()s.
+ */
+public class EvalScanner extends AbstractScriptScanner {
+
+	/**
+	 * Array of preference keys used to define the style of token types used by
+	 * this scanner.
+	 */
+	private static String fgTokenProperties[] = new String[] { IShellColorConstants.SHELL_EVAL,
+		IShellColorConstants.SHELL_VARIABLE };
+
+	public EvalScanner(IColorManager manager, IPreferenceStore store) {
+		super(manager, store);
+		initialize();
+	}
+
+	@Override
+	protected List<IRule> createRules() {
+		List<IRule> rules = new ArrayList<>();
+
+		// Token types used in the rules
+		IToken defaultToken = this.getToken(IShellColorConstants.SHELL_EVAL);
+		IToken varToken = this.getToken(IShellColorConstants.SHELL_VARIABLE);
+
+		// Add generic whitespace rule. This is here for efficiency reasons,
+		// there is a LOT of whitespace and when a token is detected the other
+		// rules are not evaluated.
+		rules.add(new WhitespaceRule(new WhitespaceDetector()));
+		rules.add(new DollarBraceCountingRule('{', '}', varToken, '\\'));
+		rules.add(new DollarRule(new DollarDetector(), defaultToken, varToken));
+		setDefaultReturnToken(defaultToken);
+		return rules;
+	}
+
+	@Override
+	protected String[] getTokenProperties() {
+		return fgTokenProperties;
+	}
+
+}