1 files changed, 67 insertions, 0 deletions
diff --git a/autotools/org.eclipse.linuxtools.cdt.autotools.ui/src/org/eclipse/linuxtools/internal/cdt/autotools/ui/FileRelevance.java b/autotools/org.eclipse.linuxtools.cdt.autotools.ui/src/org/eclipse/linuxtools/internal/cdt/autotools/ui/FileRelevance.java
new file mode 100644
index 0000000000..a360965f84
--- /dev/null
+++ b/autotools/org.eclipse.linuxtools.cdt.autotools.ui/src/org/eclipse/linuxtools/internal/cdt/autotools/ui/FileRelevance.java
@@ -0,0 +1,67 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Broadcom 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:
+ *     James Blackburn (Broadcom) - Initial API and implementation
+ *     Markus Schorn (Wind River Systems)
+ *******************************************************************************/
+package org.eclipse.linuxtools.internal.cdt.autotools.ui;
+
+import org.eclipse.cdt.core.model.CoreModel;
+import org.eclipse.cdt.core.model.ICProject;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.ResourceAttributes;
+
+/**
+ * This class computes a relevance for files in case we have to select
+ * from multiple files for the same file-system location.
+ */
+public class FileRelevance {
+	private static final int PREFERRED_PROJECT 		= 0x40;
+	private static final int CDT_PROJECT 			= 0x20;
+	private static final int ON_SOURCE_ROOT			= 0x10;
+
+	// Penalty for undesirable attributes
+	private static final int LINK_PENALTY			= 1;
+	private static final int INACCESSIBLE_SHIFT 	= 4;
+
+	/**
+	 * Compute a relevance for the given file. The higher the score the more relevant the
+	 * file. It is determined by the following criteria: <br>
+	 * - file belongs to preferred project <br>
+	 * - file belongs to a cdt-project <br>
+	 * - file belongs to a source folder of a cdt-project <br>
+	 * - file is accessible
+	 * - file is not a link
+	 * @param f the file to compute the relevance for
+	 * @return integer representing file relevance. Larger numbers are more relevant
+	 */
+	public static int getRelevance(IFile f, IProject preferredProject) {
+		int result= 0;
+		IProject p= f.getProject();
+		if (p.equals(preferredProject))
+			result+= PREFERRED_PROJECT;
+
+		if (CoreModel.hasCNature(p)) {
+			result+= CDT_PROJECT;
+			ICProject cproject= CoreModel.getDefault().create(p);
+			if (cproject.isOnSourceRoot(f))
+				result+= ON_SOURCE_ROOT;
+		}
+
+		if (!f.isAccessible())
+			result >>= INACCESSIBLE_SHIFT;
+		else {
+			ResourceAttributes ra = f.getResourceAttributes();
+			if (f.isLinked() || (ra != null && ra.isSymbolicLink()))
+				result -= LINK_PENALTY;
+		}
+
+		return result;
+	}
+}