1 files changed, 64 insertions, 0 deletions
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/expressions/CPropertyTester.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/expressions/CPropertyTester.java
new file mode 100644
index 00000000000..ecf152b3170
--- /dev/null
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/expressions/CPropertyTester.java
@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2014 Intel Corporation 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:
+ *     Intel Corporation - initial API and implementation
+ *     Sergey Prigogin (Google)
+ *******************************************************************************/
+package org.eclipse.cdt.internal.ui.expressions;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.eclipse.core.expressions.PropertyTester;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.preferences.IPreferencesService;
+
+import org.eclipse.cdt.core.model.CoreModel;
+import org.eclipse.cdt.core.model.ITranslationUnit;
+
+/**
+ * Property tester to test expressions in plugin.xml. Tests following expressions:
+ * 1. Checks whether given object is a source file. Usage:
+ *   <test property="org.eclipse.cdt.ui.isSource"/>
+ * 2. Checks value of a preference. Usage:
+ *   <test property="org.eclipse.cdt.ui.checkPreference" value="org.eclipse.cdt.ui:properties.export.page.enable=true"/>
+ */
+public class CPropertyTester extends PropertyTester {
+	private static final String KEY_SRC = "isSource"; //$NON-NLS-1$
+	private static final String KEY_PREF = "checkPreference"; //$NON-NLS-1$
+	private static final Pattern PREFERENCE_PATTERN = Pattern.compile("(.*)[/:](.*)=(.*)"); //$NON-NLS-1$
+
+	@Override
+	public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
+		if (KEY_SRC.equals(property)) {
+			if (receiver instanceof ITranslationUnit) {
+				return ((ITranslationUnit) receiver).isSourceUnit();
+			} else if (receiver instanceof IFile) {
+				IFile file = (IFile) receiver;
+				return CoreModel.isValidSourceUnitName(file.getProject(), file.getName());
+			}
+		} else if (KEY_PREF.equals(property) && expectedValue instanceof String) {
+			Matcher matcher = PREFERENCE_PATTERN.matcher((String) expectedValue);
+			if (matcher.matches()) {
+				String pluginId = matcher.group(1);
+				String preference = matcher.group(2);
+				String wantedValue = matcher.group(3);
+
+				IPreferencesService preferences = Platform.getPreferencesService();
+				String actualValue = preferences.getString(pluginId, preference, null, null);
+				if (wantedValue != null) {
+					return wantedValue.equals(actualValue) || (actualValue == null && wantedValue.equals("false")); //$NON-NLS-1$
+				} else {
+					return actualValue != null;
+				}
+			}
+		}
+		return false;
+	}
+}