Filter unwanted file types from editor text search scope.

editor/tools/plugins/com.google.dart.tools.search/src/com/google/dart/tools/search/internal/ui/text/TextSearchScopeFilter.java

Index: editor/tools/plugins/com.google.dart.tools.search/src/com/google/dart/tools/search/internal/ui/text/TextSearchScopeFilter.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.search/src/com/google/dart/tools/search/internal/ui/text/TextSearchScopeFilter.java	(revision 0)
+++ editor/tools/plugins/com.google.dart.tools.search/src/com/google/dart/tools/search/internal/ui/text/TextSearchScopeFilter.java	(revision 0)
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2012, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.dart.tools.search.internal.ui.text;
+
+import org.eclipse.core.resources.IResourceProxy;
+
+import java.io.File;
+
+/**
+ * Identifies file types that should be filtered from dart search scopes.
+ */
+public class TextSearchScopeFilter {
+
+  private static final String LIB_CONFIG_PATH = "dart-sdk" + File.separator + "lib"
+      + File.separator + "config";
+
+  /**
+   * Checks if the given file should be filtered out of a search scope.
+   * 
+   * @param file the file name to check
+   * @return <code>true</code> if the file should be excluded, <code>false</code> otherwise
+   */
+  public static boolean isFiltered(File file) {
+    //dart-sdk/lib/config
+    if (file.getAbsolutePath().endsWith(LIB_CONFIG_PATH)) {
+      return true;
+    }
+    return isFiltered(file.getName());
+  }
+
+  /**
+   * Checks if the given file should be filtered out of a search scope.
+   * 
+   * @param file the file to check
+   * @return <code>true</code> if the file should be excluded, <code>false</code> otherwise
+   */
+  public static boolean isFiltered(IResourceProxy file) {
+    return isFiltered(file.getName());
+  }
+
+  /**
+   * Checks if the given file name should be filtered out of a search scope.
+   * 
+   * @param fileName the file name to check
+   * @return <code>true</code> if the file should be excluded, <code>false</code> otherwise
+   */
+  private static boolean isFiltered(String fileName) {
+    //ignore .files (and avoid traversing into folders prefixed with a '.')
+    if (fileName.startsWith(".")) {
+      return true;
+    }
+    if (fileName.endsWith(".dart.js")) {
+      return true;
+    }
+    return false;
+  }
+}